The present invention relates to a fingerprint reader.
BACKGROUND
[0002]
　Fingerprints, which has a million people dissimilarity of different by an individual, and lifelong having invariant that does not change life. Therefore, fingerprint, has led to the identification of individuals is widely used in situations where needed.
[0003]
　The apparatus for reading a fingerprint as described above, optical and apparatus capacitive like are known (Patent Documents 1-4). For example, in the optical device, the fingerprint is read is captured by CMOS (Complementary Metal Oxide Semiconductor) two-dimensional image sensor such as an image sensor.
[0004]
　Among optical device for imaging a fingerprint using an image sensor, transmission light type fingerprint input devices have been attracting attention (see Patent Documents 1-3). In transmitted light type fingerprint input apparatus, light from a light source placed in the finger and is scattered in the finger, thereby forming an image of the fingerprint by using the light emerging out again from the finger surface .
CITATION
Patent Document
[0005]
Patent Document 1: WO 2017/047090 Patent
Patent Document 2: WO 2017/047091
Patent Document 3: WO 2017/047092 Patent
Patent Document 4: JP 2005-182474 JP
Summary of the Invention
Problems that the Invention is to Solve
[0006]
　As described above, when reading a fingerprint by various methods, a finger of reading a fingerprint is generally finger reading surface on the reading sensor in accordance with the method such as an image sensor is mounted fingerprint is read. In this case, for example, wet fingers, and high water retention capacity fingers, relatively soft finger as newborns and infants fingers, depending on the manner of placement of the finger to the reading surface, the position with respect to the sensor surface there may be a shift. The finger position deviation with respect to the reading surface occurs, because it is difficult to read the fingerprint properly, it is difficult to obtain a high-quality fingerprint images that can be utilized for personal identification and the like.
[0007]
　An object of the present invention is to provide a fingerprint reading apparatus which can suppress the positional deviation of the reading surface of the finger to be read a fingerprint.
Means for Solving the Problems
[0008]
　According to one aspect of the present invention, a mounting portion in which the finger is placed, the reading surface of the finger placed on the mounting section is in contact, provided in the mounting table, the mounting section a pair of light sources for emitting light to the finger placed on the fingerprint of the finger in contact with the reading surface, and scattered inside the finger reading read by imaging by light emitted from the surface of the finger and a section, the pair of light source, the reading surface, provided on both sides of the opposite ends in the width direction of the mounting section, is formed along the longitudinal direction of the mounting section, respectively guide It has a light unit, the light guide unit, the fingerprint reader is provided, characterized in that it is formed so as to extend up over the end of the reading surface.
The invention's effect
[0009]
　According to the present invention, it is possible to suppress the positional displacement with respect to the reading surface of the finger to be read a fingerprint.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010]
[1] Figure 1 is a schematic diagram showing a fingerprint reading system according to a first embodiment of the present invention.
FIG. 2 is a plan view showing a fingerprint reading apparatus according to the first embodiment of the present invention.
FIG. 3 is a longitudinal sectional view showing a fingerprint reading apparatus according to the first embodiment of the present invention.
[4] FIG. 4 is a cross-sectional view showing a fingerprint reading apparatus according to the first embodiment of the present invention.
[Figure 5A] Figure 5A is a schematic diagram showing an example of a sensor driving unit in the fingerprint reading apparatus according to a first embodiment of the present invention.
[Figure 5B] Figure 5B is a schematic diagram showing an example of a sensor driving unit in the fingerprint reading apparatus according to a first embodiment of the present invention.
FIG. 6 is a schematic diagram showing how to read the fingerprint of the subject's finger using a fingerprint reading apparatus according to the first embodiment of the present invention.
[7] FIG. 7 is a block diagram showing a fingerprint reading apparatus according to the first embodiment of the present invention.
[8] FIG. 8 is a block diagram showing an image processing apparatus according to the first embodiment of the present invention.
FIG 9A] FIG 9A is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a first embodiment of the present invention.
[FIG. 9B] FIG 9B is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a first embodiment of the present invention.
FIG 9C] FIG 9C is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a first embodiment of the present invention.
FIG 10A] FIG 10A is a schematic view illustrating the principle of deformation of the fingerprint is reduced when reading the fingerprint by the fingerprint reading apparatus according to a first embodiment of the present invention.
[FIG. 10B] FIG 10B is a schematic view illustrating the principle of deformation of the fingerprint is reduced when reading the fingerprint by the fingerprint reading apparatus according to a first embodiment of the present invention.
[FIG. 10C] FIG 10C is a schematic view illustrating the principle of deformation of the fingerprint is reduced when reading the fingerprint by the fingerprint reading apparatus according to a first embodiment of the present invention.
[11] FIG 11 is a plan view showing a fingerprint reading apparatus according to a second embodiment of the present invention.
[12] FIG 12 is a longitudinal sectional view showing a fingerprint reading apparatus according to a second embodiment of the present invention.
FIG 13A] FIG 13A is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a second embodiment of the present invention.
FIG 13B] FIG 13B is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a second embodiment of the present invention.
[FIG. 13C] FIG 13C is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a second embodiment of the present invention.
[14] FIG 14 is a plan view showing a fingerprint reading apparatus according to a third embodiment of the present invention.
[15] FIG 15 is a longitudinal sectional view showing a fingerprint reading apparatus according to a third embodiment of the present invention.
[Figure 16A] Figure 16A is a schematic diagram showing an example of a sensor driving unit in the fingerprint reading apparatus according to a third embodiment of the present invention.
[FIG. 16B] FIG 16B is a schematic diagram showing an example of a sensor driving unit in the fingerprint reading apparatus according to a third embodiment of the present invention.
FIG 17A] FIG 17A is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a third embodiment of the present invention.
[Figure 17B] Figure 17B is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a third embodiment of the present invention.
[FIG. 17C] FIG 17C is a schematic diagram illustrating the operation of the fingerprint reading apparatus according to a third embodiment of the present invention.
[18] FIG 18 is a plan view showing a fingerprint reading apparatus according to a fourth embodiment of the present invention.
[19] FIG 19 is a plan view showing a fingerprint reading apparatus according to a fifth embodiment of the present invention.
[20] FIG 20 is a cross-sectional view showing a fingerprint reading apparatus according to a sixth embodiment of the present invention.
[21] FIG 21 is a longitudinal sectional view showing a fingerprint reading apparatus according to a seventh embodiment of the present invention.
[22] FIG 22 is a flowchart showing the operation of the fingerprint reading apparatus and an image processing apparatus according to an eighth embodiment of the present invention.
FIG. 23 is a block diagram showing the functional configuration of the fingerprint reader according to another embodiment of the present invention.
DESCRIPTION OF THE INVENTION
[0011]
　First Embodiment
　will be described with reference to FIGS. 1 to 10C fingerprint reading apparatus and fingerprint reading method according to a first embodiment of the present invention.
[0012]
　First, an overall configuration of a fingerprint reading system comprising a fingerprint reader device according to the present embodiment will be described with reference to FIG. Figure 1 is a schematic diagram showing the overall construction of the fingerprint reading system according to the present embodiment.
[0013]
　As shown in FIG. 1, a fingerprint reading system 1 according to this embodiment includes a fingerprint reader 10 for reading by imaging a fingerprint of a subject, with respect to the fingerprint image of a fingerprint read by the fingerprint reader 10 display, and an image processing apparatus 20 that performs processing such as recording. Fingerprint reader 10 includes a mounting portion 102 which subject's finger is placed, and a gripping portion 104 which is gripped by the user during use. The mounting portion 102, the sensor surface 118 of the finger placed on the placing portion 102 is in contact is provided. Fingerprint reader 10 is communicably connected to the image processing apparatus 20 via the communication cable 30. Note that the fingerprint reader 10, instead of the wired system by the communication cable 30, may be communicatively connected to the image processing apparatus 20 by wireless method.
[0014]
　Fingerprint reader 10 according to the present embodiment, for example, neonates, infants and young children, it is an subject to be read a fingerprint. Neonates, infants and young children, in particular finger neonates, compared with adult finger, soft due to the high water ratios may be readily increased elastic deformation as compared to the adult finger. Fingerprint reader 10 according to this embodiment, as described later, newborn, as infants and young children's fingers, even when a finger capable of relatively soft easily increased elastic deformation due to the high water ratio , it is possible to read the fingerprint to the right. Incidentally, newborns, infants, toddlers, etc., it is impossible or difficult imaging fingerprints in themselves alone. If this way himself alone should read the subject fingerprint image pickup is impossible or difficult for the fingerprint, as will be described later, it becomes adult and others operable devices is a user, the user, the subject's fingerprint It will be performed a reading of.
[0015]
　Fingerprint reader 10 is an optical fingerprint scanner to read a fingerprint by capturing the fingerprint image by using a two-dimensional image sensor. Fingerprint reader 10, for example, can be imaged either one of the fingerprint image of the finger of the left hand and right hand, respectively thumb of the subject, the index finger, middle finger, ring finger, and a total of ten pinky finger . Also, the fingerprint reader 10, not only the fingers, first toe of each left and right foot, the second toe, third toe, any of the fourth toe, and the fifth toe of the total ten toes one leg finger (toe) fingerprint image or can be taken to.
[0016]
　For example newborns, if baby or toddler is subject, using a fingerprint reader 10, captures a fingerprint for a plurality of fingers toes for one subject, the fingerprint image of the plurality of fingers to use personal identification it can be provided. In this case, for example, for one subject can be imaged left thumb, right thumb, first toe of the left foot, and successively the fingerprint for the first toe of the right foot.
[0017]
　Further described below with reference to FIGS. 2 to 7 The specific configuration of the fingerprint reader 10 according to this embodiment. Figure 2 is a plan view showing a fingerprint reader 10 according to this embodiment shows a plan viewed from the surface side of the front and back surfaces of the fingerprint reader 10. Figure 3 is a longitudinal sectional view showing a fingerprint reader 10 according to this embodiment, showing a longitudinal section along the line A-A of FIG. Figure 4 is a transverse sectional view showing the fingerprint reader 10 according to this embodiment, showing a cross section along the line B-B of FIG. 5A and 5B are schematic diagrams showing an example of a sensor driving unit in the fingerprint reading apparatus 10 according to the present embodiment. Figure 6 is a schematic diagram showing how to read the fingerprint of the subject's finger using a fingerprint reader 10 according to this embodiment. Figure 7 is a block diagram showing a fingerprint reader 10 according to this embodiment. Note that in each drawing referred to in the first embodiment and subsequent embodiments, the scale of each member is not always constant, for convenience of explanation, and may have been exaggerated.
[0018]
　As shown in FIGS. 2 to 4, the fingerprint reader 10 according to this embodiment includes a housing 106, an image sensor 108, a sensor cover 110, a pair of side light source 112, a sensor driving unit 114, the control and a circuit 116.
[0019]
　Housing 106 is of hollow having a substantially rectangular parallelepiped outer shape with flattened the thin vertically, it has a longitudinal direction and longitudinal direction. Housing 106 is, for example made of resin. Of longitudinal front portion and a rear portion along the housing 106, part 102 mounting the front portion, the rear portion has a gripping portion 104. Front end portion of the mounting portion 102 has a tapered shape which is inclined toward the surface side from the back side. Incidentally, the outer shape of the housing 106 is not intended to be limited to flat the substantially rectangular parallelepiped outer shape, it can be adopted any shape.
[0020]
　The image sensor 108 is provided in the housing 106 of the mounting portion 102. The image sensor 108 is positioned to direct the imaging surface on the outside of the housing 106. The imaging surface of the image sensor 108, the sensor cover 110 is provided.
[0021]
　Surface of the sensor cover 110 is adapted to the sensor surface 118 is a reading surface of the ball of the finger of a subject to be read a fingerprint is in contact is placed. Sensor cover 110 is composed is constituted by a plate-like member made of a material which transmits near-infrared light, for example, protective glass. Accordingly, incident on the finger on the sensor cover 110 are radiated from a pair of side light source 112 as will be described later, the near-infrared light image sensor 108 emitted from the ventral side of the finger after being scattered in the finger so that the incident on.
[0022]
　An imaging surface of an image sensor 108 has a rectangular planar shape having an area larger than the finger pad for which to image the fingerprint (toe). The image sensor 108, the imaging position below the longitudinal direction of the rectangular planar shape is arranged along the longitudinal direction of the housing 106. The planar shape of the image sensor 108 is not limited in particular, it is possible to adopt various shapes. Further, on the rear surface of the image sensor 108, an image sensor 108 heat sink made of metal or the like may be provided for cooling.
[0023]
　The image sensor 108 functions as a reading unit to read the fingerprint of the finger. The image sensor 108, as described later, by receiving the near infrared light emitted from the ball of the finger in contact with the sensor surface 118 of the sensor cover 110 has passed through the sensor cover 110 on the imaging surface, a fingerprint of a finger It is configured to read by imaging. The image sensor 108 is a two-dimensional image sensor, for example, a CMOS image sensor. Further, as the image sensor 108, in addition to the CMOS image sensor, it is also possible to use a CCD (Charge Coupled Device) image sensor. Pixel density and the number of pixels of the image sensor 108 include, but are not limited to, newborns, infants, and considering the case of imaging a fingerprint, such as infant, a large number of pixels at a high density, for example, as above 1000ppi it is preferable. Specifically, as the image sensor 108, for example, size width 20 mm, a length of 30 mm, pixel density can be used large and CMOS image sensor large number of pixels of high pixel density is 1270Ppi.
[0024]
　The front end of the image sensor 108 via a hinge portion 120 is attached to the top plate of the mounting portion 102 forward in the housing 106. The hinge unit 120 includes a pivot shaft along the width direction of the portion 102 mounting in the housing 106. Incidentally, the front or forward end of the image sensor 108 indicates the end opposite to the grip portion 104 at the ends, i.e. mounting portion 102 in the fingerprint reading apparatus 10. Further, the side and rear end after the image sensor 108 indicates the central portion of the fingerprint reader 10, i.e. the end of the grip portion 104 side of the mounting portion 102.
[0025]
　Sensor cover includes an image sensor 108 and the sensor surface 118 110 is swingable as a fulcrum pivot shaft of the hinge unit 120 located at the end of the mounting portion 102 forward. Thus, the sensor cover 110 including an image sensor 108 and the sensor surface 118 includes an imaging position is the first position, between a retracted position than the imaging position is a second position located within the housing 106 It is movable.
[0026]
　In the imaging position, the image sensor 108 and the sensor cover 110, the sensor surface 118 of the sensor cover 110 are arranged so as to be perpendicular to the vertical direction of the mounting portion 102. Further, the image sensor 108 and the sensor cover 110 is positioned at the imaging position is in sealed mounting portion 102. On the other hand, in the retracted position, the image sensor 108 and the sensor cover 110, the sensor surface 118 of the sensor cover 110 are arranged to be inclined so as to face the side obliquely upward after placing portion 102.
[0027]
　Sensor cover 110 including an image sensor 108 and the sensor surface 118 is driven by the sensor drive unit 114, to move between the imaging position and the retracted position. In the imaging position, the sensor surface 118 is in contact with the belly mounted on the mounting portion 102 fingers. On the other hand, in the retracted position, the sensor surface 118, belly mounted on the mounting portion 102 finger separates.
[0028]
　3 shows the image sensor 108 and the sensor cover 110 in the imaging position shown in solid lines, the image sensor 108 and the sensor cover 110 at the retracted position by a one-dot chain line. As shown, the sensor surface 118 of the sensor cover 110 in the imaging position is perpendicular to the vertical direction of the mounting portion 102, it is substantially the stepless flush with the surface of the grip portion 104. On the other hand, the sensor surface 118 of the sensor cover 110 at the retracted position, toward the rear side from the front side of the mounting portion 102 is inclined so as to enter the inside of the housing 106.
[0029]
　On both sides of the area of ​​the sensor surface 118 in the mounting portion 102 of the housing 106, a pair of side light source 112 is provided. A pair of side light source 112, respectively, is a linear light source provided so as to extend along the longitudinal direction of the longitudinal and which mounting portion 102 of the housing 106. A pair of side light source 112, the sensor surface 118, provided on both sides of the opposite ends in the width direction of the mounting portion 102, are opposed to each other in the width direction of the mounting portion 102 via the sensor surface 118 . A pair of side light source 112 is a light source that irradiates near infrared light on placed on the sensor surface 118 of the mounting portion 102 fingers.
[0030]
　Each lateral source 112 includes a plurality of near-infrared LED 122, a light guide portion 124 formed so as to cover a plurality of near-infrared LED 122. In each lateral light sources 112, a plurality of near-infrared LED122 is arranged so as to be aligned in a row along the longitudinal direction of the mounting portion 102. A plurality of near-infrared LED122 arranged in a row are covered by the light guide portion 124 provided along the longitudinal direction of the mounting portion 102.
[0031]
　A plurality of near-infrared LED122 are each a unit light source constituting a linear light source, for emitting near-infrared light of a wavelength 820 ~ 980 nm. Each near-infrared LED122, in the vertical direction of the housing 106, is provided at a higher height than the sensor surface 118 at the same height or the imaging position and the sensor surface 118 in the imaging position. Each near-infrared LED122 is arranged inclined to the central upper sensor surface 118 in the imaging position so as to face its optical axis. Each near-infrared LED122 is arranged to be inclined so as to be smaller than the larger 90 degrees than the angle, for example 0 ° of the optical axis with respect to the sensor surface 118.
[0032]
　By the near infrared LED122 are disposed inclined manner, the lateral light source 112, which is a linear light source is inclined towards the inside of the sensor surface 118 to which the optical axis is positioned at the imaging position, the the optical axis is configured to face the upper center of the sensor surface 118. Each lateral source 112 is, for example smaller than than 90 degrees than the angle of the optical axis, for example, 0 degrees with respect to the sensor surface 118. By thus optical axes of the lateral light source 112 is inclined toward the inside of the sensor surface 118, the lateral light source 112, a near-infrared light of sufficient light amount, the mounting portion 102 sensor it can be irradiated to the placed finger on the surface 118.
[0033]
　The light guide portion 124 is composed of a translucent resin other translucent material such as silicone or the like. Incidentally, the light-transmitting material constituting the light guide portion 124 is not limited in particular as long as a plurality of near-infrared LED122 has a light-transmitting property with respect to near-infrared light emitted, various it can be used a light-transmitting material.
[0034]
　The light guide portion 124, so as to cover a plurality of near-infrared LED122 a plurality of unit light sources in a row along the longitudinal direction of the mounting portion 102, are formed along the longitudinal direction of the mounting portion 102 there. Light guide section 124 for covering the plurality of near-infrared LED 122 is guided while spreading the near-infrared light emitted from the plurality of near-infrared LED 122, placed on the sensor surface 118 of the mounting portion 102 It is emitted toward the have been finger.
[0035]
　The light guide portion 124 has a ridge-shaped protrusions 126, and a projecting portion 126 and the skirt-like edge portion 128 which is integrally formed. Protrusion 126 is formed in a ridge shape so as to protrude above the mounting portion 102 to cover the plurality of near-infrared LED 122. Edge end portion 128 on the side of the sensor surface 118 of the protrusion 126 is formed integrally to supporting shaped a protrusion 126 so as continuously extending sensor surface 118 side from the projecting portion 126. Edge end portion 128 is lower vertical height of the mounting portion 102 than protrusions 126 gradually its height is lower toward the sensor surface 118 side.
[0036]
　Protrusions 126, for example, has a surface convex toward the opposite side in which mounting portion 102 upward of the sensor surface 118. On the other hand, edge end portion 128, for example, has a surface convex toward the at which mounting portion 102 below the side of the sensor surface 118.
[0037]
　The light guide portion 124 is formed so as to extend partially flared up on the end of the sensor surface 118. More specifically, the light guide portion 124, the edge 128 side of the part and the edge end portion 128 of the protrusion 126, located on the end of the sensor surface 118 protrudes on the end portion of the sensor surface 118 are doing. The light guide portion 124 in this manner partially overhanging the surface of the sensor surface 118 side is configured to contact the sensor surface 118 side of the surface of the finger on the sensor surface 118. Thus, the light guide portion 124, that are formed so as to extend partially flared up on the end of the sensor surface 118, is configured to placed on the placing portion 102 fingers can be supported there.
[0038]
　Overhang width edge 128 side of the part and the edge end portion 128 of the protrusion 126 is the width located on an end portion of the sensor surface 118 projects is made constant over the longitudinal direction of the mounting portion 102 . Overhang width of the edge 128 side of the part and the edge end portion 128 of the protrusion 126 is not limited in particular, it is set appropriately depending on the size of the finger of age to be subject it can. For example, if the subject neonates, for the image sensor 108 of width 20 mm, the light guide portion 124 on both sides, respectively, of a portion of the edge 128 side of the projecting portion 126 and the edge end portion 128 overhanging width can be configured to be 5 mm. In this case, the width of the sensor surface 118 which is exposed between the opposite sides of the edge 128 becomes 10 mm.
[0039]
　On the lower surface of the part and the sensor surface 118 side of the edge end portion 128 of the part at which the projecting portion 126 located overhangs on the ends of the sensor surface 118 of the light guide portion 124, the light shielding portion 130 is provided. The lower surface of the sensor surface 118 side of the part and the edge end portion 128 of the light-shielding portion 130 is provided protruding portions 126 is a flat surface parallel to the sensor surface 118 in the imaging position.
[0040]
　Shielding portion 130 is near-infrared light emitted from the near-infrared LED122 is provided in order to prevent the directly entering the image sensor 108 from the protrusion 126 and the edge end portion 128 without passing through the finger . By near-infrared light to direct the image sensor 108 without passing through the finger is prevented by the light shielding portion 130 from being incident, it is possible to obtain a higher quality fingerprint images to reduce noise light. Incidentally, the light blocking portion 130 may be of a reflective type of shielding near-infrared light by reflecting the near-infrared light entering the light-shielding portion 130, near-infrared light entering the light-shielding portion 130 the may be of the absorption type of shielding near-infrared light by absorbing. The light shielding part 130, it is possible to use such a film made of a light shielding material for shielding near-infrared light by reflecting or absorbing near infrared light, foil, sheet and other light shielding member.
[0041]
　In the fingerprint reading apparatus 10 according to the present embodiment, the light guide portion 124, not only the projecting portion 126, the edge 128 close to the sensor surface 118 than protrusions 126, a near toward the finger on the sensor surface 118 it can be irradiated external light. Furthermore, edge end portion 128 or the edge end portion 128 and the projection 126 is in contact with the placed sensor surface 118 side of the surface of the finger on the sensor surface 118. Such edge end portion 128, it is possible to increase the amount of near-infrared light entering into the finger on the sensor surface 118. Therefore, according to this embodiment, it is possible to obtain a high quality fingerprint images contrast.
[0042]
　Further, the light guide portion 124 in the lateral light source 112 not only guides the near infrared light emitted from the plurality of near-infrared LED122 As described above, on the sensor surface 118 of the mounting portion 102 the placed finger functions as a support capable constructed support. That is, the light guide portion 124, and part edge end portion 128 of the protrusion 126 positioned overhangs on the ends of the sensor surface 118, as shown in FIG. 4, the sensor surface of the finger F on the sensor surface 118 in contact with the 118-side surface is adapted to support the finger F from the sensor surface 118 side. By such a light guide portion 124 is provided, to support the finger to be imaged fingerprint stably suppressing the positional deviation of the finger to the sensor surface 118 can be further prevented.
[0043]
　In particular, the fingerprint reader 10 according to this embodiment, the sensor cover 110 including an image sensor 108 and the sensor surface 118 as described above has a structure to move between the retracted position and the imaging position. In such a configuration, a part and edge end portion 128 of the protrusion 126 contacts the sensor surface 118 side of the surface of the finger F for supporting the finger F from the sensor surface 118 side. Accordingly, the positional deviation of the finger F due to the movement of the image sensor 108 and the sensor cover 110 suppression, more can be prevented. For example, an image sensor 108 and the sensor cover 110 is a case where it has been moved to a retracted position from the imaging position, suppressing the positional deviation of the finger F due to the movement, it is possible to further prevent.
[0044]
　The image sensor 108 is in the imaging position is read by imaging a fingerprint placed on the finger on the sensor surface 118. Here, the sensor driving unit 114, as described below, the sensor surface 118 in contact with the finger in the imaging position, is moved to the retracted position from the imaging position to return is moved to the imaging position from the further retracted position. In this case, the image sensor 108 reads by imaging a fingerprint of a finger contacting the sensor surface 118 has returned to the imaging position from the retracted position.
[0045]
　The image sensor 108 is read by imaging a fingerprint by near-infrared light scattered within the finger emitted from the surface of the finger. Principles fingerprint is imaged by the image sensor 108 is as follows. In imaging of a fingerprint is, in a state contacting the ball of the finger on the sensor surface 118 of the sensor cover 110, a near-infrared light from the pair of side light source 112 is emitted. Near-infrared light emitted from the pair of side light source 112 is incident on the finger on the sensor cover 110. Infrared light incident on the fingers, after scattered in the finger and emitted from the surface of the finger outside the finger. Near-infrared light emitted to the outside of the finger, depending on whether the output from either the valley portion exiting from the ridge portion of the fingerprint, and that the intensity is different.
[0046]
　Near-infrared light emitted to the outside of the finger from the ridge portion of the fingerprint, since the ridge portion is in contact with the sensor surface 118 of the sensor cover 110, without being attenuated significantly, the image sensor 108 at a relatively high strength incident reached. On the other hand, the near-infrared light emitted from the valley line of a fingerprint outside the finger, because the valley portions is not in contact with the sensor surface 118, by the air layer present between the valley line portion and the sensor surface 118 spreading It is. Along with this, it occurs refraction phenomenon and reflection due to the difference in refractive index at the interface of the skin and the air and air and the sensor cover 110. Or Accordingly, the near-infrared light emitted from the valley line portion, as compared with near-infrared light emitted from the ridge portion is increased attenuation, enters to reach the image sensor 108 at a relatively low intensity, image it is impossible to reach the sensor 108.
[0047]
　As a result, the image sensor 108, fingerprint image exists difference in brightness between the ridge portion and the valley portion of the fingerprint is imaged. That is, in the fingerprint image focused, ridges of a fingerprint is a bright portion, the valley portion is dark portion. Thus, the fingerprint is imaged by receiving the near-infrared light emitted by scattered within the finger outside the finger by the image sensor 108.
[0048]
　The image sensor 108 of the captured fingerprint of the finger outputs image data constituting the fingerprint image. As described later, the image data output from the image sensor 108 is passed through the control circuit 116, is transferred to the image processing apparatus 20 via the communication cable 30. Image data is the image processing apparatus is transferred 20, based on the transferred image data, display of the fingerprint image, performs recording or the like.
[0049]
　Sensor driving unit 114 is provided below the rear end portion of the image sensor 108 in the housing 106 of the mounting portion 102. Sensor driving unit 114 swingably lowered rear end portion of the image sensor 108 attached to the housing 106, is driven to raise, swing the sensor cover 110 including an image sensor 108 and the sensor surface 118 a driving section for moving by.
[0050]
　Specifically, the sensor driving unit 114 lowers the rear portion of the image sensor 108 located at the imaging position, to swing the sensor cover 110 including an image sensor 108 and the sensor surface 118 retracted position from the imaging position to move to. The sensor driving unit 114 raises the rear end of the image sensor 108 located at the retracted position, to move the sensor cover 110 including an image sensor 108 and the sensor surface 118 from the retracted position by swinging the imaging position . Thus, the sensor driving unit 114, a sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved to the retracted position from the imaging position to return is moved to the imaging position from the further retracted position.
[0051]
　Configuration of the sensor driving unit 114 is not limited to the particular configuration, the rear end portion of the image sensor 108 drops, as long as it can be raised. For example, the sensor driving unit 114, may have a configuration solenoid of solenoid type used as an actuator. 5A and 5B, as an example of a sensor driving unit 114 shows the one having a structure of a solenoid type. Figure 5A is a side view showing a solenoid type of sensor driver 114 when the image sensor 108 is positioned at the imaging position. Figure 5B is a side view showing a solenoid type of sensor driver 114 when the image sensor 108 is positioned at the retracted position.
[0052]
　As shown in FIGS. 5A and 5B, the sensor driving unit 114 of the solenoid includes a solenoid 132, a contact portion 134, and an elastic body member 136.
[0053]
　Solenoid 132 includes a plunger 138, and a main body portion 140 including the coil, the plunger 138 in the energizing state is a pull-type solenoid is drawn into the main body 140. Body portion 140 of the solenoid 132 is provided in the bottom of the housing 106 as the plunger 138 in the vertical direction of the housing 106 is operated.
[0054]
　Abutment 134 is attached to the upper end of the plunger 138. Abutment 134 supports the rear end portion of the image sensor 108 in contact with the lower surface of the rear end portion of the image sensor 108. Between the abutment 134 and the main body portion 140, the elastic member 136 such as a spring for biasing the abutment portion 134 to the image sensor 108 side.
[0055]
　In the non-energized state of the solenoid 132, as shown in FIG. 5A, the plunger 138 is not drawn into the main body 140. Further, the contact portion 134 is biased to the image sensor 108 side by the elastic member 136. Contact portion 134 which is urged by the elastic member 136 supports the rear end of the image sensor 108 in contact with the lower surface of the rear end portion of the image sensor 108. In the non-energized state, the sensor cover 110 including an image sensor 108 and the sensor surface 118 is positioned at the imaging position.
[0056]
　On the other hand, when electric power is supplied to the solenoid 132, the plunger 138 is drawn into the main body 140. When the plunger 138 is drawn into the main body portion 140 contact portion 134 is lowered against the urging force of the elastic member 136. Accordingly, also lowered rear end of the image sensor 108 that is supported by the abutment portion 134. Therefore, the contact portion 134, as shown in FIG. 5B, for supporting the image sensor 108 to the lower surface of the rear end portion of the image sensor 108 at a position lower than the position of the non-energized state abuts. Thus, in the energized state, the sensor cover 110 including an image sensor 108 and the sensor surface 118 is positioned at the retracted position.
[0057]
　Further, the energization of the solenoid 132 is stopped, pulling into the body portion 140 of the plunger 138 is released. Further, the plunger 138 and the contact portion 134 to return to rise by the biasing force of the elastic body member 136 to the initial position of the non-energized state. Accordingly, also rises the rear end of the image sensor 108 that is supported by the abutment portion 134. Thus, in the non-energized state after the energized state, the sensor cover 110 including an image sensor 108 and the sensor surface 118 returns to its imaging position.
[0058]
　Thus, the sensor driving unit 114 of the solenoid is the abutting portion 134 which is attached to the plunger 138, lowering the rear end portion of the image sensor 108, is increased. This movement, the sensor driving unit 114, a sensor cover 110 including an image sensor 108 and the sensor surface 118 is swung, the sensor cover 110 including an image sensor 108 and the sensor surface 118 between a retracted position and an imaging position make.
[0059]
　As described above, the sensor drive unit 114, can be used as the solenoid with a solenoid 132. The drive mechanism of the sensor driving unit 114 for moving the image sensor 108 and the sensor cover 110 is not limited to the electric mechanism using a solenoid 132 as described above. Drive mechanism of the sensor driving unit 114, electrically driven drive motor, may be another electrical mechanism using a linear actuator or the like, operable handle manually, lever, link, arm, etc. it may be a mechanical mechanism using.
[0060]
　Gripper 104 is the rear portion of the housing 106, when the imaging of a fingerprint, a portion held by the user to perform imaging of a finger of a subject to be imaged fingerprint.
[0061]
　Newborn, infant, toddler, etc., is impossible or difficult to those who imaging of the fingerprint is in itself alone. Therefore, performed by the user is himself alone operable devices adult person or minors, by operating the fingerprint reader 10, neonates, infants, the imaging of the subject's finger fingerprint is an infant or the like . The user holds the grip 104 with one hand the fingerprint reader 10 from mounting portion 102 side of the front, is moved toward the finger, such as thumb of the subject to be imaged fingerprint. The user, for example, among the fingers gripping the grip portion 104, the thumb is positioned on the top plate side of the housing 106, the gripping portion 104 as four-finger other than the thumb is positioned on the bottom plate side of the housing 106 the can be gripped from the side. Furthermore, the user, while using the other hand if necessary, as shown in FIG. 6, it is possible to contact the abdomen of the subject's finger to the sensor surface 118 of the sensor cover 110. Although not shown in FIG. 6, the user is able to fix its position holding the subject's finger in contact with the sensor surface 118 with a fingertip, such as the thumb of the hand gripping the grip portion 104.
[0062]
　The bottom surface of the grip portion 104 is gripped by the user, the mobile switch 142 of the push-button is provided. Moving switch 142 and presses this, drives the sensor driving unit 114 is configured to be able to move the sensor cover 110 including an image sensor 108 and the sensor surface 118. That is, the mobile switch 142 and presses this, the image sensor 108 and the sensor cover 110 is moved to the retracted position from the imaging position, further, to be able to return to move the imaging position from the retracted position It is configured.
[0063]
　Further, the bottom surface of the grip portion 104, the capture switch 144 pushbutton is provided. Capture switch 144 by depressing it, it is possible to perform instruction lit or off for the lateral light source 112, the image capture command of the fingerprint relative to the image sensor 108, or an instruction for recording of the fingerprint image to the image processing apparatus 20 It is configured to.
[0064]
　The user gripping the grip portion 104, while holding the holding portion 104, the mobile switch 142 and captured by one of four fingers located on the bottom plate side of the housing 106 of the fingers gripping the grip portion 104 You can press the switch 144.
[0065]
　The mobile switch 142, as between the bottom surface of the pressing surface and the grip portion 104 of the moving switch 142 is substantially flat and formed so as to be embedded in the grip portion 104. Also, the capture switch 144 also, like between the pressing surface and the bottom surface of the grip portion 104 of the capture switch 144 is substantially flat and formed so as to be embedded in the grip portion 104. Thus movement switch 142 and the capture switch 144 that is provided so as not to protrude with respect to the bottom surface of the grip portion 104, it is possible to suppress erroneous pressing of movement switch 142 and capture switch 144.
[0066]
　In the grip portion 104 of the housing 106, the control circuit 116 is housed. Further, the side end portion of the rear side of the grip portion 104, the connector portion 146 is provided with a communication cable 30 is connected.
[0067]
　Figure 7 is a block diagram illustrating each part of the fingerprint reader 10 described above, the image sensor 108, shows the details of the side light source 112, the sensor driving unit 114, and control circuit 116.
[0068]
　As shown in FIG. 7, the image sensor 108 includes a pixel array 148, and a timing generator 150. The image sensor 108 includes a vertical scanning circuit 152, a column amplification circuit 154, the A / D (Analog / Digital) conversion circuit 156, and a horizontal scanning circuit 158, and a signal processing circuit 160.
[0069]
　In the pixel array 148, a plurality of pixels arranged in a matrix. Each pixel includes a photoelectric conversion element for generating a pixel signal by photoelectrically converting the near-infrared light incident. The timing generator 150 generates and outputs a timing signal for controlling the vertical scan circuit 152 and the horizontal scanning circuit 158. The vertical scanning circuit 152 scans the pixel of the pixel array 148 for each pixel row. Column amplification circuit 154 amplifies the pixel signal read by the scanning of the vertical scanning circuit 152. A / D conversion circuit 156 converts the pixel signals amplified by the column amplifying circuit 154 from an analog signal to a digital signal. The horizontal scanning circuit 158 ​​scans for each pixel column in order to read out pixel signals converted by the A / D conversion circuit 156 to the outside. The signal processing circuit 160 performs predetermined signal processing on pixel signals outputted is read out by the horizontal scanning circuit 158 ​​from the A / D conversion circuit 156, and outputs the image data constituting the fingerprint image. Image data output from the signal processing circuit 160 is input to the control circuit 116.
[0070]
　In the side light source 112, each of the plurality of near-infrared LED 122, a current limiting resistor 162 for limiting the current flowing through the infrared LED 122, and transistor 164 is connected as a switch.
[0071]
　The anode terminals of the near-infrared LED 122, one terminal of the current limiting resistor 162 is connected. The cathode terminal of each near-infrared LED 122, the collector of the transistor 164 are connected. The other terminal of the current limiting resistor 162, a positive power supply voltage VDD is input. The base of transistor 164 is connected to the control circuit 116, on-off of the transistor 164 is switched by a switch signal input from the control circuit 116 to the base.
[0072]
　The control circuit 116 includes a CPU (Central Processing Unit) 166, a ROM (Read Only Memory) 168, a RAM (Random Access Memory) 170. Further, the control circuit 116, a video controller 172 has an interface (I / F) 174, a communication controller 176. Further, the control circuit 116 includes a voltage regulator 178. CPU 166, ROM 168, RAM 170, video controller 172, I / F174, and the communication controller 176 is connected to a common bus line 180.
[0073]
　CPU166 executes a program for controlling the operation of the fingerprint reader 10, and controls the operation of each unit of the fingerprint reader 10. ROM168 stores a program that CPU166 to be executed. Further, RAM 170 is a working area when the CPU166 executes the program.
[0074]
　Video controller 172 is connected to the signal processing circuit 160 of the image sensor 108, image data from the signal processing circuit 160 is input. Video controller 172 transfers the image data to the communication controller 176 via the bus line 180.
[0075]
　The I / F174, the timing generator 150 of the image sensor 108 are connected. Thus, the control signal by the CPU166 is input to the timing generator 150 via the I / F174. The timing generator 150 generates and outputs a timing signal based on the control signal inputted through the I / F174.
[0076]
　In addition, the I / F174, based multiple transistors 164 in the lateral source 112 is connected. Thus, the switch signal by the CPU166 is input to the base of the transistor 164 via the I / F174. Transistor 164 is switched off on the basis of the switch signal input through the I / F174. By on-off of the transistor 164 is switched, it is switched on and off of the lateral light source 112 is switched on and off of the near-infrared LED 122.
[0077]
　Sensor driver 114 includes a solenoid 132, a driver 182 for controlling the driving of the solenoid 132. The driver 182 is connected to the I / F174. Thus, the control signal by the CPU166 is input to the driver 182 via the I / F174. Driver 182 based on the control signal inputted through the I / F174, and controls the driving of the solenoid 132.
[0078]
　The I / F174, the moving switch 142 is connected. In response to the pressing of the movement switch 142, the output of the control signal of the driver 182 is triggered by the CPU 166.
[0079]
　More specifically, in the read state before the fingerprint by the image sensor 108, the sensor cover 110 including an image sensor 108 and the sensor surface 118 is positioned at the imaging position. When moving the switch 142 is depressed, the sensor driving unit 114, the solenoid 132 is driven by a driver 182. Accordingly, sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved to the retracted position from the imaging position to return to move the imaging position from the further retracted position.
[0080]
　The movement switch 142 is not necessarily provided. Alternatively, when the finger touches is detected by the sensor surface 118, similarly to the above, the output of the control signal of the driver 182 is triggered by the sensor drive unit 114, an image sensor 108 and the sensor surface 118 sensor cover 110 including the can also be configured to move toward the retracted position from the imaging position. This is not provided moving switch 142 configured, contact of a finger on the sensor surface 118, for example, can be detected based on a change in the image captured by the image sensor 108, also provided on the sensor surface 118 it can be detected by a sensor capable of detecting a contact, such as a touch sensor.
[0081]
　Further, operating time up to the image sensor 108 and the sensor cover 110 returns to the imaging position via the retracted position from the imaging position is not limited in particular, it can be appropriately set. However, the operation time, it is preferable that the elastic deformation of the finger once in contact with the sensor surface 118 is set to a time which is sufficiently reduced.
[0082]
　In addition, the I / F174, the capture switch 144 is connected. In response to the pressing of the capture switch 144, the output of the switch signal of the control signal and the lateral source 112 of the image sensor 108 by the CPU166 is triggered.
[0083]
　More specifically, in the stop state of the image sensor 108, lateral light source 112 is also turned off, the capture switch 144 is pressed in this state, the lateral light source 112 is turned on, the image sensor 108 is a fingerprint imaging. The image sensor 108 of the captured fingerprint, outputs image data of the captured fingerprint image. After outputting the image data, the image sensor 108 becomes stopped, the lateral light source 112 is unlit. The image processing apparatus 20, image data of the fingerprint image by the image sensor 108 has output is transferred.
[0084]
　Communication controller 176 functions as a transfer unit for transferring the image data of the fingerprint image, and transfers the image data transferred from the video controller 172, via the communication cable 30 connected to the connector unit 146 to the image processing apparatus 20 . Communication controller 176, for example USB is configured to communicate with the image processing apparatus 20 via the communication cable 30 in accordance with (Universal Serial Bus) or the like communication standard.
[0085]
　Communication cable 30, and two differential signal lines for transmitting and receiving signals, a power supply line for power supply, is configured to have a ground line. Communication controller 176 transmits and receives a signal by two differential signal lines of the communication cable 30.
[0086]
　The voltage regulator 178, and the power supply line of the communication cable 30 is connected, power from a power source circuit 216 (see FIG. 8) in the image processing apparatus 20 via the power supply line is supplied. Voltage regulator 178 and supplies the adjusted voltage of the supplied electric power as a power source to each unit of the fingerprint reader 10. Fingerprint reader 10 has assumed a bus-powered operated by electric power thus supplied via the communication cable 30 from the image processing apparatus 20. Note that the fingerprint reader 10 is not intended to be limited to the bus-powered, for example, may be one which is operated by power supplied by the internal battery.
[0087]
　On the other hand, the image processing apparatus 20, to the fingerprint image to be transferred from the fingerprint reader 10 of the captured fingerprint, its display, and functions as an image processing unit that performs processing such as recording. The image processing apparatus 20, for example, can be configured laptop, personal computer tablet or the like (PC), a computer device such as a smartphone. The image processing apparatus 20 may also control the operation of the fingerprint reader 10. The image processing apparatus 20 is not necessarily required to include a display 214 described later, it is also possible to configure the image processing unit as not including a display unit.
[0088]
　Further described below with reference to FIG. 8 the specific configuration of the image processing apparatus 20. Figure 8 is a block diagram showing an image processing apparatus 20.
[0089]
　As shown in FIG. 8, the image processing apparatus 20 includes a CPU 202, a ROM 204, a RAM 206, has a HDD (Hard Disk Drive) 208, a communication controller 210. The image processing apparatus 20 includes a display controller 212, a display 214. The image processing apparatus 20 includes a power supply circuit 216, and an input device 218. A CPU 202, ROM 204, RAM 206, HDD 208, communication controller 210, display controller 212, a power supply circuit 216, and input device 218 are connected to a common bus line 220. The image processing apparatus 20 includes a connector portion 222 of the communication cable 30 is connected is provided.
[0090]
　CPU202 controls the image processing apparatus 20 as a whole operation. Further, CPU 202 executes an image processing program for performing display of the fingerprint image acquired by the fingerprint reader 10, the recording and the like. The image processing program performs image processing on the image data transferred by the fingerprint reader 10, display of the fingerprint image, performs recording or the like.
[0091]
　The ROM204, programs such as a boot program is recorded. RAM206 is used as a working area when performing CPU202 processing. Further, RAM 206 also functions as an image memory in which image data of a fingerprint image to be transferred from the fingerprint reader 10 is temporarily stored. The HDD 208, the program of the image processing program and the like CPU202 executes is recorded.
[0092]
　Further, HDD 208 also functions as a recording unit for recording the fingerprint image captured by the fingerprint reader 10. CPU202 functions as a recording control section records the fingerprint image into HDD 208. The recording unit for recording the fingerprint image is not limited to the HDD 208, it can be used instead of the HDD 208, various recording apparatus as a recording unit. Recording unit for recording the fingerprint image may be built in the image processing apparatus 20 as HDD 208, or may be a separate and independent of the external recording device from the image processing apparatus 20.
[0093]
　Communication controller 210 functions as a receiving unit for receiving image data of the fingerprint image, via the communication cable 30 connected to the connector unit 222, receives the image data transferred from the communication controller 176 of the fingerprint reader 10 . Image data received by the communication controller 210 is temporarily stored in the RAM206 as an image memory. Communication controller 210, in response to the communication controller 176, for example, is configured to communicate with the fingerprint reading apparatus 10 via the communication cable 30 according to a communication standard such as USB. Communication controller 210, in response to the communication controller 176 is configured to perform transmission and reception of signals by the two differential signal lines of the communication cable 30.
[0094]
　The display controller 212, a display 214 functioning as a display unit for displaying a fingerprint image is connected. The display controller 212 functions as a display control unit in cooperation with CPU 202, and displays the drawing a display screen of the image processing program executed by the CPU 202 to the display 214. The display screen of the image processing program to be displayed on the display 214 includes a preview window captured fingerprint image is displayed. Incidentally, the display 214 is not particularly limited, for example, a liquid crystal display. Further, the display 214, a laptop, may be those incorporated in the image processing apparatus 20 is a PC of tablet, etc., the image processing apparatus 20 be an external display provided separately good.
[0095]
　Power supply circuit 216 supplies internal power of the power of the image processing apparatus 20, or the power of the connected external power supply to the image processing apparatus 20 to the fingerprint reader 10. Power supply circuit 216, power supply lines and ground lines are connected in a communication cable 30 supplies power to the voltage regulator 178 of the fingerprint reader 10 via a power line.
[0096]
　Input device 218 may be, for example, a keyboard, a mouse, or the like. The input device 218 may be a touch panel incorporated in the display 214. Operator, via the input device 218, an image processing program to be displayed on the display 214, the subject's identification number (ID), to input character information such as the name, or select the information related to the type of the finger can do. Further, it is possible to perform settings such as imaging conditions.
[0097]
　Thus, the fingerprint reading system 1 is constituted according to the present embodiment.
[0098]
　Then, further 9A to 9C, the operation of the fingerprint reading apparatus 10 according to the present embodiment, and will be described with reference to FIGS. 10A to 10C. 9A to 9C are schematic views illustrating the operation of the fingerprint reading apparatus 10 according to the present embodiment. 9A to 9C show a positional relationship between the finger F and the image sensor 108 and the sensor cover 110 during the period from the finger F is in contact with the sensor surface 118 until the image the fingerprint. For simplicity, in FIG. 9A through FIG. 9C, are omitted side light source 112. 10A to 10C are schematic views for explaining the principle of elastic deformation of the fingerprint is reduced when reading the fingerprint by the fingerprint reading apparatus 10 according to the present embodiment. Figure 10A is a schematic diagram showing an ideal fingerprint to be read schematically. Figure 10B is a schematic diagram schematically showing a fingerprint to be read from the large elastically deformed finger. Figure 10C is a schematic view schematically showing a fingerprint to be read from the elastic deformation is reduced finger.
[0099]
　In a state where the fingerprint reading apparatus 10 is stopped, the sensor cover 110 including an image sensor 108 and the sensor surface 118 is positioned at the imaging position. First, in a condition in which the image sensor 108 and the sensor cover 110 is positioned at the imaging position, as shown in FIG. 9A, the user, the ball of a finger F of a subject, contacting the sensor surface 118 of the fingerprint reader 10 make. For example, the ball of a finger F, the longitudinal direction of the housing 106, i.e. the mounting along the finger F in the longitudinal direction of the portion 102, the sensor surface 118 from the front side of the mounting portion 102 is a front of the housing 106 and slid into contact with the sensor surface 118.
[0100]
　In a state where the ball of the finger F is in contact with the sensor surface 118, in each of the pair of side light source 112, and a portion edge end portion 128 of the protrusion 126 positioned overhangs on the ends of the sensor surface 118, sensor contacting the placed on sensor surface 118 side of the surface of the finger F on the surface 118. And part edge end portion 128 of the protrusion 126 in contact with the sensor surface 118 side of the surface of the finger F supports the finger F in contact with the sensor surface 118 from the sensor surface 118 side.
[0101]
　Here, when brought into contact with the sensor surface 118 of the finger F, as described above, by the force other forces encountered direction sensor surface 118 is slid, the finger F in contact with the sensor surface 118, if a large elastic deformation occurs is there. In particular, when the finger F, such as newborns and infants finger, because of the high moisture ratio, relatively soft, large elastic deformation can occur. Further, when the slide the sensor surface 118 to the belly of the finger F, as described above, the tip-side portion of the finger F is to undergo a force in the direction in which the sensor surface 118 is slipped over a longer time than the portion of the base side Become. Thus, the tip-side portion of the finger F, as compared to base side portion, may be larger elastic deformation.
[0102]
　Reading a fingerprint in a state where large elastic deformation occurs in the finger F, fingerprint to be read, wholly or locally largely deformed, be different greatly from the ideal fingerprint. For example, the entire fingerprint large elastic deformation is read from the finger F produced, as compared to the ideal fingerprint shown in FIG. 10A, the direction in which slides the sensor surface 118 as shown in FIG. 10B, that is, in the longitudinal direction of the finger F the things that shrank manner to. Incidentally, fingerprints, not shrink only, depending on the force applied to the finger F, or elongation, etc. that flexes, can deform in a variety of ways. Further, fingerprints, if also entirely deformed as shown in FIG. 10B, there may be that the part is locally deformed.
[0103]
　Then, in a state where the ball of the finger F is in contact with the sensor surface 118, the user presses the move switch 142. By pressing the mobile switch 142 for the fingerprint reader 10, and inputs a drive instruction signal for instructing driving of the image sensor 108 and the sensor cover 110.
[0104]
　CPU166 fingerprint reader 10, in response to the input driving instruction signal by pressing a movement switch 142 drives the sensor driving unit 114 to drive the sensor cover 110 including an image sensor 108 and the sensor surface 118. Accordingly, sensor cover 110 including an image sensor 108 and the sensor surface 118 swings the swing axis of the hinge portion 120 for attaching the front end portion of the image sensor 108 to the housing 106 as a fulcrum.
[0105]
　In the structure without the mobile switch 142, instead of the pressing of the movement switch 142, when the ball of the finger F is detected that contacts the sensor surface 118, similarly to the above, the drive instruction signal is inputted, sensor cover 110 including an image sensor 108 and the sensor surface 118 is driven by the sensor drive unit 114.
[0106]
　Sensor cover 110 including an image sensor 108 and the sensor surface 118 to swing, first, as shown in FIG. 9B, is lowered rear end portion, is moved to the retracted position from the imaging position. In the retracted position, the sensor surface 118, away from the ball of the finger F. In the structure without the mobile switch 142, when it is detected that the ball of the finger F is in contact with the sensor surface 118, sensor cover 110 including an image sensor 108 and the sensor surface 118 is lowered rear end portion, imaging moves toward the retracted position from the position.
[0107]
　Then, the sensor cover 110 including an image sensor 108 and the sensor surface 118 has moved to the retracted position, as shown in FIG. 9C, the rear end portion rises and returns to move the imaging position from the retracted position. In return the imaging position, the sensor surface 118 is again in contact with the ball of the finger F.
[0108]
　Incidentally, CPU 166 of the fingerprint reader 10 as a trigger the rear end of the image sensor 108 and the sensor cover 110 is switched increase the descent, it is possible to use various trigger. For example, CPU 166 is lowered rear end portion of the image sensor 108 and the sensor cover 110, the sensor surface 118 detects that apart from the finger F, as a trigger which, the rear end of the image sensor 108 and the sensor cover 110 parts so as to raise and it is possible to drive the sensor driving unit 114. That is, when the sensor surface 118 toward the retracted position from the imaging position detects that apart from the finger F, the sensor drive unit 114 moves toward the sensor cover 110 including an image sensor 108 and the sensor surface 118 to the imaging position. Sensor surface 118 be spaced from the finger F, for example, it can be detected based on a change in the image captured by the image sensor 108, also capable of detecting the contact of the touch sensor or the like provided on the sensor surface 118 it can be detected by.
[0109]
　Also, if the user moves the image sensor 108 and the sensor cover 110 manually using a mobile switch 142 may be configured as follows. That is, by pressing the mobile switch 142 again, such that the sensor cover 110 including an image sensor 108 and the sensor surface 118 toward the retracted position from the imaging position is moved toward the imaging position from the retracted position by changing the direction of movement It can also be configured. In this case, for example, CPU202 of CPU166 or the image processing apparatus 20 of the fingerprint reading apparatus 10 detects that the sensor surface 118 is separated from the finger F, the user, that the sensor surface 118 is separated from the finger F e.g. notification light, notification sound, to notification by the screen display or the like. Thus, the user, without having to lower the entire image sensor 108 and the sensor cover 110, it is possible to know the timing for raising the image sensor 108 and the sensor cover 110. Users sensor surface 118 has been notified that apart from the finger F presses the moving switch 142 again. When pressed by the moving switch 142 again, the sensor surface 118 toward the imaging position from the retracted position is a position apart from the finger F, the sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved.
[0110]
　Thus, in this embodiment, in the retracted position, the sensor surface 118, once separated from the ball of the finger F. Subsequently, in the image pickup position after returning from the retracted position, the sensor surface 118 is again in contact with the ball of the finger F. By sensing surface 118 is moved away once from the ball of the finger F, reducing the elastic deformation of the finger F generated when the sensor surface 118 is in contact with the first, more can be eliminated. In the present embodiment, thus reducing the elastic deformation of the finger F, more from resolved, read by imaging a fingerprint of the finger F as described below, to acquire a fingerprint image. Therefore, according to this embodiment, even when reading a relatively soft easy to fingerprints of a finger F which can be elastically deformed, it is possible to read the fingerprint appropriate, to acquire a high-quality fingerprint images it can. Reading the fingerprint to reduce such an elastic deformation occurring in the finger F, the fingerprint to be read, as shown in FIG. 10C, it becomes almost same as the ideal fingerprint shown in FIG. 10A.
[0111]
　Further, in this embodiment, until the image sensor 108 and the sensor cover 110 is moved to the retracted position from the imaging position and further to return to the imaging position, the light guide portion 124 supports the finger F. That is, during this time, a part and edge end portion 128 of the part at which the projecting portion 126 located overhangs on the ends of the sensor surface 118 of the light guide portion 124, supports the finger F from the sensor surface 118 side. Therefore, according to this embodiment, the sensor surface 118 despite away once from the ball of the finger F, suppressing the positional deviation of the finger F, it is possible to further prevent, therefore, more appropriately a fingerprint of the finger F it can be read, it is possible to further obtain a high-quality fingerprint images.
[0112]
　Meanwhile, JP 2005-182474, detects that the finger is placed on the placing portion, configured to be moved up to the placement portion fingerprint sensor is described by a motor. In this configuration, except when reading the fingerprint for positioning the lowered position is separated from the mounting portion is a fingerprint sensor, it is difficult to ensure the sealing of the enclosure, thus there is a problem in dust resistance and the like . On the other hand, in this embodiment, the image sensor 108 and the sensor cover 110, usually located at the imaging position to seal the mounting portion 102 moves when reading the fingerprint, to the retracted position from the imaging position, further return to move the imaging position from the retracted position. Thus, in the present embodiment, usually because of the sealed image sensor 108 and the sensor cover 110 mounting portion 102, it is possible to ensure excellent dustproof property.
[0113]
　Then, in a state where the ball is in contact again finger F on the sensor surface 118 of the fingerprint reader 10, the user presses the capture switch 144. By pressing the capture switch 144 for the fingerprint reader 10, and inputs the imaging instruction signal instructing the imaging.
[0114]
　CPU166 fingerprint reader 10, in response to the imaging instruction signal inputted by pressing the capture switch 144, drives the image sensor 108, to turn on the lateral light source 112. Accordingly, the fingerprint reader 10 reads by imaging a fingerprint of the finger F in the image sensor 108, it acquires a fingerprint image. After acquisition of the fingerprint image, CPU 166 of the fingerprint reader 10, turns off the lateral light source 112.
[0115]
　Further, CPU 166 of the fingerprint reader 10 acquires a fingerprint image, via the communication cable 30, and transfers the image data of the acquired fingerprint image to the image processing apparatus 20.
[0116]
　In the image processing apparatus 20 in which the image data of the fingerprint image has been transferred, CPU 202, after temporarily storing the image data in RAM206 as an image memory, a predetermined image processing on the image data subjected. Furthermore, CPU 202 of the image processing apparatus 20 displays the fingerprint image on the display 214. Further, CPU 202 of the image processing apparatus 20, or automatically fingerprint image according to the input of the recording instruction from the user is recorded in the HDD208 or the like.
[0117]
　Second Embodiment
　will be described with reference to the second fingerprint reading apparatus and fingerprint reading method according to embodiment 11 to 13C of the present invention. Incidentally, the same components as the fingerprint reader device according to the first embodiment to omit the description the same reference numerals or simplified.
[0118]
　The basic configuration of the fingerprint reader according to the present embodiment is substantially the same as the configuration of the fingerprint reader 10 according to the first embodiment. Fingerprint reader device according to the present embodiment, by regarding the portion where the image sensor 108 is positioned attached to the housing 106, and lowering is supported by the sensor driver 114 of the image sensor 108, it is increased, according to the first embodiment It is different from the fingerprint reader 10.
[0119]
　Hereinafter will be described with reference to FIGS. 11 and 12 the specific configuration of the fingerprint reader device according to the present embodiment. Figure 11 is a plan view showing a fingerprint reading apparatus according to the present embodiment shows a plan viewed from the surface side of the front and back surfaces of the fingerprint reader. Figure 12 is a longitudinal sectional view showing a fingerprint reading apparatus according to the present embodiment, showing a longitudinal section along the line A-A of FIG. 11.
[0120]
　As shown in FIGS. 11 and 12, the fingerprint reader 2010 according to this embodiment, unlike the first embodiment, the rear end portion of the image sensor 108 via a hinge portion 2120, the grip portion 104 of the housing 106 It is attached to the top plate front end of. The hinge 2120 includes a pivot shaft along the width direction of the portion 102 mounting in the housing 106.
[0121]
　Sensor cover includes an image sensor 108 and the sensor surface 118 110 is swingable as a fulcrum pivot shaft of the hinge portion 2120 located at the end of the mounting portion 102 rear. Thus, the sensor cover 110 including an image sensor 108 and the sensor surface 118 includes an imaging position is the first position, between a retracted position than the imaging position is a second position located within the housing 106 It is movable.
[0122]
　In the imaging position, the image sensor 108 and the sensor cover 110, as in the first embodiment, the sensor surface 118 of the sensor cover 110 are arranged so as to be perpendicular to the vertical direction of the mounting portion 102. Further, the image sensor 108 and the sensor cover 110 is positioned at the imaging position, as in the first embodiment, seals the mounting portion 102. On the other hand, in the retracted position, in the present embodiment, unlike the first embodiment, the image sensor 108 and the sensor cover 110 is inclined so as to face obliquely upwardly forward of the sensor surface 118 mounting portion 102 of the sensor cover 110 It is placed Te.
[0123]
　Sensor cover 110 including an image sensor 108 and the sensor surface 118 is driven by the same sensor driving unit 2114 and the sensor driver 114 according to the first embodiment, to move between the imaging position and the retracted position.
[0124]
　FIG. 12 shows an image sensor 108 and the sensor cover 110 in the imaging position shown in solid lines, the image sensor 108 and the sensor cover 110 at the retracted position by a one-dot chain line. As shown, the sensor surface 118 of the sensor cover 110 in the imaging position, as in the first embodiment, is perpendicular to the vertical direction of the mounting portion 102, a substantially stepless flush with the surface of the grip portion 104 going on. On the other hand, the sensor surface 118 of the sensor cover 110 at the retracted position, unlike the first embodiment, toward the front side from the rear side of the mounting portion 102 is inclined so as to enter the inside of the housing 106.
[0125]
　Fingerprint reader 2010 according to this embodiment, in place of the sensor driving unit 114 according to the first embodiment has a sensor driving unit 2114. Sensor driver 2114 is provided below the front end portion of the image sensor 108 in the housing 106 of the mounting portion 102. Sensor driver 2114 is to have a same driving mechanism and sensor driver 114 according to the first embodiment.
[0126]
　Sensor driver 2114, swingably lowered front portion of the image sensor 108 attached to the housing 106, is driven to raise, to oscillate the sensor cover 110 including an image sensor 108 and the sensor surface 118 it is to move Te.
[0127]
　Specifically, the sensor driving unit 2114 lowers the front end of the image sensor 108 located at the imaging position, to swing the sensor cover 110 including an image sensor 108 and the sensor surface 118 to the retracted position from the imaging position so moved. The sensor driving unit 2114, it raises the front end of the image sensor 108 located at the retracted position, to move the sensor cover 110 including an image sensor 108 and the sensor surface 118 from the retracted position by swinging in the imaging position. Thus, the sensor driving unit 2114, a sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved to the retracted position from the imaging position to return is moved to the imaging position from the further retracted position.
[0128]
　Configuration of the sensor driving unit 2114, similarly to the sensor driver 114 according to the first embodiment, is not limited to a particular configuration, lowering the front end of the image sensor 108, as long as it can be raised good. For example, the sensor driving unit 2114, similarly to the sensor driver 114 according to the first embodiment, may have a configuration solenoid of solenoid type used as an actuator.
[0129]
　Will now be described with reference to FIGS. 13A to 13C, the operation of the fingerprint reading apparatus 2010 according to this embodiment. 13A to 13C are schematic views for explaining the operation of the fingerprint reading apparatus 2010 according to this embodiment. 13A to 13C show the positional relationship between the finger F and the image sensor 108 and the sensor cover 110 during the period from the finger F is in contact with the sensor surface 118 until the image the fingerprint. For simplicity, in FIGS. 13A to 13C, are omitted side light source 112.
[0130]
　First, like the first embodiment, with the sensor cover 110 including an image sensor 108 and the sensor surface 118 is positioned at the imaging position, as shown in FIG. 13A, the user, the ball of the finger F of the subject is contacted with the sensor surface 118 of the fingerprint reader 2010. In a state in which the ball of the finger F is in contact with the sensor surface 118, similarly to the first embodiment, and part edge end portion 128 of the protrusion 126 in contact with the sensor surface 118 side of the surface of the finger F, the sensor surface 118 the finger F in contact with the support from the sensor surface 118 side.
[0131]
　Then, in a state where the ball of the finger F is in contact with the sensor surface 118, the user, similarly to the first embodiment, the user presses the move switch 142. By pressing the mobile switch 142 for the fingerprint reader 2010, and inputs a drive instruction signal for instructing driving of the image sensor 108 and the sensor cover 110.
[0132]
　CPU166 fingerprint reader 2010 according to the input drive instruction signal by the pressing of the movement switch 142 drives the sensor driving unit 2114 to drive the sensor cover 110 including an image sensor 108 and the sensor surface 118. Accordingly, sensor cover 110 including an image sensor 108 and the sensor surface 118 swings the swing axis of the hinge portion 2120 for attaching the rear end portion of the image sensor 108 to the housing 106 as a fulcrum.
[0133]
　Also in this embodiment, it may be a structure without the mobile switch 142 as in the first embodiment. In this case, when the ball of the finger F is detected that contacts the sensor surface 118, similarly to the above, the drive instruction signal is inputted, the image sensor 108 and the sensor cover 110 is driven by the sensor driver 2114.
[0134]
　Sensor cover 110 including an image sensor 108 and the sensor surface 118 to swing, first, as shown in FIG. 13B, and lowered front end, is moved to the retracted position from the imaging position. In the retracted position, the sensor surface 118, away from the ball of the finger F. In the structure without the mobile switch 142, when it is detected that the ball of the finger F is in contact with the sensor surface 118, an image sensor 108 and the sensor cover 110 is lowered front end portion, toward the retracted position from the imaging position moving Te.
[0135]
　Then, the sensor cover 110 including an image sensor 108 and the sensor surface 118 has moved to the retracted position, as shown in FIG. 13C, the front end portion rises and returns to move the imaging position from the retracted position. In return the imaging position, the sensor surface 118 is again in contact with the ball of the finger F.
[0136]
　Incidentally, CPU 166 of the fingerprint reading apparatus 2010 is triggered the front end portion of the image sensor 108 and the sensor cover 110 is switched increase the descent, it is possible to use various trigger. For example, CPU 166 may be lowered front end of the image sensor 108 and the sensor cover 110, the sensor surface 118 detects that apart from the finger F, as a trigger which, the front end portion of the image sensor 108 and the sensor cover 110 as increase, it is possible to drive the sensor driving unit 2114. That is, when the sensor surface 118 toward the retracted position from the imaging position detects that apart from the finger F, the sensor driving unit 2114 moves toward the sensor cover 110 including an image sensor 108 and the sensor surface 118 to the imaging position. The sensor surface 118 is separated from the finger F can be detected as in the first embodiment.
[0137]
　Also, in this embodiment, like the first embodiment, by pressing the mobile switch 142 again, the sensor cover 110 including an image sensor 108 and the sensor surface 118 toward the retracted position from the imaging position, changing the direction of movement It may be configured to move toward the imaging position from the retracted position Te.
[0138]
　Thus, also in this embodiment, in the retracted position, the sensor surface 118, once separated from the ball of the finger F. Subsequently, in the image pickup position after returning from the retracted position, the sensor surface 118 is again in contact with the ball of the finger F. Thus, also in this embodiment, the elastic deformation of the finger F generated upon contact with the sensor surface 118 initially reduced, thereby further eliminating. Therefore, according to this embodiment, even when reading a relatively soft easy to fingerprints of a finger F which can be elastically deformed, it is possible to read the fingerprint appropriate, to acquire a high-quality fingerprint images it can.
[0139]
　Also, in this embodiment, the image sensor 108 and moves the sensor cover 110 is imaging position to the retracted position, until further returned to the imaging position, a part of the protrusion 126 in the light guide portion 124 and the edge end portion 128 but supports the finger F from the sensor surface 118 side. Therefore, according to this embodiment, the sensor surface 118 despite away once from the ball of the finger F, suppressing the positional deviation of the finger F, it is possible to further prevent, therefore, more appropriately a fingerprint of the finger F it can be read, it is possible to further obtain a high-quality fingerprint images.
[0140]
　Also, in this embodiment, like the first embodiment, normally because of the sealed image sensor 108 and the sensor cover 110 mounting portion 102, it is possible to ensure excellent dustproof property.
[0141]
　Subsequent operations will be omitted because it is similar to the first embodiment.
[0142]
　Incidentally, those in the above-described first and second embodiments, the front end or the rear end portion of the image sensor 108, the description has been given of the case via a hinge portion 2120 is attached to the housing 106, which is limited to is not. For example, one side edge portion of the image sensor 108 via the hinge portion may be pivotally mounted to one side portion of the mounting portion 102 in the housing 106. In this case, the hinge unit includes, for example, the swing shaft along the longitudinal direction of the portion 102 mounting in the housing 106. In this case, the mounting portion 102, down the other side edge portion of the image sensor 108 is driven to raise, it can be provided similar sensor driving unit and the sensor driver 114.
[0143]
　Third Embodiment
　will be explained with reference to FIGS. 14 to 17C for the third read fingerprint according to an embodiment the apparatus and the fingerprint reading method of the present invention. Incidentally, to omit the description the same reference numerals or simplified for the same components as the fingerprint reading apparatus and fingerprint reading method according to the first and second embodiments.
[0144]
　The basic configuration of the fingerprint reader according to the present embodiment is substantially the same as the configuration of the fingerprint reader 10 according to the first embodiment. Fingerprint reader device according to the present embodiment, by regarding aspects image sensor 108 and the sensor cover 110 is moved, is different from the fingerprint reader 10 according to the first embodiment.
[0145]
　Hereinafter will be described with reference to FIGS. 14 to 16B specific structure of the fingerprint reading apparatus according to the present embodiment. Figure 14 is a plan view showing a fingerprint reading apparatus according to the present embodiment shows a plan viewed from the surface side of the front and back surfaces of the fingerprint reader. Figure 15 is a longitudinal sectional view showing a fingerprint reading apparatus according to the present embodiment, showing a longitudinal section along the line A-A of FIG. 14. 16A and 16B are a schematic diagram showing an example of a sensor driving unit in the fingerprint reading apparatus according to the present embodiment.
[0146]
　As shown in FIGS. 14 and 15, the fingerprint reader 3010 according to this embodiment, unlike the first embodiment, the image sensor 108 through the sensor driving unit 3114, the housing 106 of the mounting portion 102 It is attached to the bottom.
[0147]
　Sensor cover 110 including an image sensor 108 and the sensor surface 118, via the sensor driver 3114, and is movable parallel to the vertical direction of the housing 106. Translatable direction of the image sensor 108 and the sensor cover 110 is made in a direction perpendicular to the sensor surface 118. Thus, the sensor cover 110 including an image sensor 108 and the sensor surface 118 includes an imaging position is the first position, between a retracted position than the imaging position is a second position located within the housing 106 It is movable. In the present embodiment, unlike the first embodiment, also in the retracted position, the image sensor 108 and the sensor cover 110 without having to tilt the sensor surface 118 of the sensor cover 110, remains perpendicular to the vertical direction of the casing 106 to become. Incidentally, the image sensor 108 and the sensor cover 110 is positioned at the imaging position, as in the first embodiment, seals the mounting portion 102.
[0148]
　Sensor cover 110 including an image sensor 108 and the sensor surface 118 is driven by the sensor drive unit 3114, to move between the imaging position and the retracted position.
[0149]
　FIG. 15 shows an image sensor 108 and the sensor cover 110 in the imaging position shown in solid lines, the image sensor and the sensor cover 110 at the retracted position by a one-dot chain line. As shown, the sensor surface 118 of the sensor cover 110 in the imaging position, as in the first embodiment, is perpendicular to the vertical direction of the mounting portion 102, a substantially stepless flush with the surface of the grip portion 104 going on. On the other hand, the sensor surface 118 of the sensor cover 110 at the retracted position is made while located within housing 106, and remains perpendicular to the vertical direction of the mounting portion 102 than when located on the imaging position.
[0150]
　Fingerprint reader 3010 according to this embodiment, in place of the sensor driving unit 114 according to the first embodiment has a sensor driving unit 3114. Sensor driver 3114 is provided below the central portion of the image sensor 108 in the housing 106 of the mounting portion 102. The top of the sensor driving unit 3114, the image sensor 108 is mounted.
[0151]
　Sensor driver 3114, lowering the image sensor 108 mounted thereon, is driven to raise, it is an image sensor 108 and the sensor cover 110 for moving by translation.
[0152]
　Specifically movement sensor driving unit 3114, lowers the overall image sensor 108 located at the imaging position, the sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved in parallel to the retracted position from the imaging position make. The sensor driving unit 3114, raises the whole of the image sensor 108 located at the retracted position, to move the sensor cover 110 including an image sensor 108 and the sensor surface 118 from the retracted position is moved in parallel to the imaging position. Thus, the sensor driving unit 3114, a sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved to the retracted position from the imaging position to return is moved to the imaging position from the further retracted position.
[0153]
　Structure of the sensor drive section 3114 is not limited to the particular configuration, the entire image sensor 108 drops, as long as it can be raised. For example, the sensor driving unit 3114, may have a structure of the pantograph mechanism is used pantographic. 16A and 16B, as an example of a sensor driving unit 3114 is shown one having a structure of pantograph. Figure 16A is a side view showing a pantograph-type sensor driver 3114 when the image sensor 108 is positioned at the imaging position. Figure 16B is a side view showing a pantograph-type sensor driver 3114 when the image sensor 108 is positioned at the retracted position.
[0154]
　As shown in FIGS. 16A and 16B, sensor driver 3114 of pantograph type includes a base 3116, a pantograph mechanism including a pantograph arm 3118, a support portion 3120. Incidentally, the pantograph arm 3118 is provided in parallel to, for example, two side by side. The sensor driving unit 3114 of the pantograph has a driving mechanism 3122 for driving the pantograph arm 3118.
[0155]
　Base 3116 is provided on the bottom of the housing 106 in the mounting portion 102. Supporting portion 3120 is provided on the base 3116 via a pantograph arm 3118. Drive mechanism 3122 is provided on the base 3116.
[0156]
　Lower end and the other end of the pantograph arm 3118 is pivotally supported on the base 3116. One end of the lower end and the other end of the pantograph arm 3118 is adapted to be slid along the base 3116. Upper end and the other end of the pantograph arm 3118 is pivotally supported on the support portion 3120. One end of the upper end and the other end of the pantograph arm 3118 is adapted to be slid along the support portion 3120.
[0157]
　Drive mechanism 3122 is for slide drive the lower end of the pantograph arm 3118. Drive mechanism 3122 is not intended to be limited to a particular mechanism, it may be used to electrically slide drive, or may be driven mechanically slide. For example, as the driving mechanism 3122, and a ball screw which is rotated by the drive motor, the lower end of the pantograph arm 3118 can be used an electric drive mechanism for driving a slide by a solenoid or the like. Further, for example, as a drive mechanism 3122, the lower end of the pantograph arm 3118 can be used a mechanical drive mechanism for driving a slide by a lever or the like to be manually operated.
[0158]
　Pantograph arm 3118, by one end of the lower slides are driven by the driving mechanism 3122, expands and contracts in the vertical direction of the housing 106. That is, the pantograph arm 3118 is extended by one end of the lower side so as to approach the other end, one end of the lower slides are driven by a drive mechanism 3122. Moreover, the pantograph arm 3118, one end of the lower side away from the other end, one end of the lower side is contracted by sliding is driven by a driving mechanism 3122.
[0159]
　The support portion 3120, an image sensor 108 is mounted. Sensor surface 118 with respect to the vertical direction of the housing 106 supports the image sensor 108 and the sensor cover 110 so as to be perpendicular.
[0160]
　As shown in FIG. 16A, in the state where the pantograph arm 3118 is extended, the sensor cover 110 including an image sensor 108 and the sensor surface 118 that is supported by the support portion 3120 is located at the imaging position.
[0161]
　As shown in FIG. 16B, when the pantograph arm 3118 is contracted state from the extended state by a drive mechanism 3122, the sensor cover 110 including an image sensor 108 and the sensor surface 118 that is supported by the support portion 3120, lowered from the imaging position to. Accordingly, sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved to the retracted position.
[0162]
　Further, when the pantograph arm 3118 is extended state from a contracted state by the driving mechanism 3122, the sensor cover 110 including an image sensor 108 and the sensor surface 118 that is supported by the support portion 3120 is moved to the imaging position from the retracted position to return.
[0163]
　Thus, the sensor driving unit 3114 of the pantograph type, due pantograph arm 3118, lowering the entire image sensor 108 and the sensor cover 110 is raised. Thus, the sensor driving unit 3114, an image sensor 108 and the sensor cover 110 is moved in parallel to move the sensor cover 110 including an image sensor 108 and the sensor surface 118 between a retracted position and an imaging position.
[0164]
　As described above, the sensor driving unit 3114, can be used as the pantograph having a pantograph mechanism.
[0165]
　Will now be described with reference to FIGS. 17A 17C, the operation of the fingerprint reading apparatus 3010 according to this embodiment. 17A-FIG. 17C is a schematic diagram illustrating the operation of the fingerprint reading apparatus 3010 according to this embodiment. 17A-17C shows the positional relationship between the finger F and the image sensor 108 and the sensor cover 110 during the period from the finger F is in contact with the sensor surface 118 until the image the fingerprint. For simplicity, in FIGS. 17A 17C, it is omitted side light source 112.
[0166]
　First, like the first embodiment, with the sensor cover 110 including an image sensor 108 and the sensor surface 118 is positioned at the imaging position, as shown in FIG. 17A, the user, the ball of the finger F of the subject is contacted with the sensor surface 118 of the fingerprint reader 3010. In a state in which the ball of the finger F is in contact with the sensor surface 118, similarly to the first embodiment, and part edge end portion 128 of the protrusion 126 in contact with the sensor surface 118 side of the surface of the finger F, the sensor surface 118 the finger F in contact with the support from the sensor surface 118 side.
[0167]
　Then, in a state where the ball of the finger F is in contact with the sensor surface 118, the user, similarly to the first embodiment, the user presses the move switch 142. By pressing the mobile switch 142 for the fingerprint reader 3010, and inputs a drive instruction signal for instructing driving of the image sensor 108 and the sensor cover 110.
[0168]
　CPU166 fingerprint reader 3010 according to the input drive instruction signal by the pressing of the movement switch 142 drives the sensor driving unit 3114 to drive the sensor cover 110 including an image sensor 108 and the sensor surface 118. Accordingly, sensor cover 110 including an image sensor 108 and the sensor surface 118 is moved in parallel in the vertical direction of the housing 106.
[0169]
　Also in this embodiment, it may be a structure without the mobile switch 142 as in the first embodiment. In this case, when the ball of the finger F is detected that contacts the sensor surface 118, similarly to the above, the drive instruction signal is inputted, the image sensor 108 and the sensor cover 110 is driven by the sensor driver 3114.
[0170]
　Sensor cover 110 including an image sensor 108 and the sensor surface 118 for translation, first, as shown in FIG. 17B, the whole is lowered, moved to the retracted position from the imaging position. In the retracted position, the sensor surface 118, away from the ball of the finger F. In the structure without the mobile switch 142, when it is detected that the ball of the finger F is in contact with the sensor surface 118, an image sensor 108 and the sensor cover 110 is entirely lowered, towards the retracted position from the imaging position Moving.
[0171]
　Then, the sensor cover 110 including an image sensor 108 and the sensor surface 118 has moved to the retracted position, as shown in FIG. 17C, a whole rises, returning to move the imaging position from the retracted position. In return the imaging position, the sensor surface 118 is again in contact with the ball of the finger F.
[0172]
　Incidentally, CPU 166 of the fingerprint reading apparatus 3010, as a trigger the entire image sensor 108 and the sensor cover 110 is switched increase the descent, it is possible to use various trigger. For example, CPU 166 is entirely lowered the image sensor 108 and the sensor cover 110, the sensor surface 118 detects that apart from the finger F, as a trigger which increases the entire image sensor 108 and the sensor cover 110 as such, it is possible to drive the sensor driving unit 3114. That is, when the sensor surface 118 toward the retracted position from the imaging position detects that apart from the finger F, the sensor driving unit 3114 moves toward the sensor cover 110 including an image sensor 108 and the sensor surface 118 to the imaging position. The sensor surface 118 is separated from the finger F can be detected as in the first embodiment.
[0173]
　Also, in this embodiment, like the first embodiment, by pressing the mobile switch 142 again, the sensor cover 110 including an image sensor 108 and the sensor surface 118 toward the retracted position from the imaging position, changing the direction of movement It may be configured to move toward the imaging position from the retracted position Te.
[0174]
　Thus, also in this embodiment, in the retracted position, the sensor surface 118, once separated from the ball of the finger F. Subsequently, in the image pickup position after returning from the retracted position, the sensor surface 118 is again in contact with the ball of the finger F. Thus, also in this embodiment, the elastic deformation of the finger F generated upon contact with the sensor surface 118 initially reduced, thereby further eliminating. Therefore, according to this embodiment, even when reading a relatively soft easy to fingerprints of a finger F which can be elastically deformed, it is possible to read the fingerprint appropriate, to acquire a high-quality fingerprint images it can.
[0175]
　Also, in this embodiment, the image sensor 108 and moves the sensor cover 110 is imaging position to the retracted position, until further returned to the imaging position, a part of the protrusion 126 in the light guide portion 124 and the edge end portion 128 but supports the finger F from the sensor surface 118 side. Therefore, according to this embodiment, the sensor surface 118 despite away once from the ball of the finger F, it is possible to suppress the positional deviation of the finger F, therefore, be read more suitably a fingerprint of the finger F can, it is possible to further obtain a high-quality fingerprint images.
[0176]
　Also, in this embodiment, like the first embodiment, normally because of the sealed image sensor 108 and the sensor cover 110 mounting portion 102, it is possible to ensure excellent dustproof property.
[0177]
　Subsequent operations will be omitted because it is similar to the first embodiment.
[0178]
　Fourth Embodiment
　A fourth embodiment fingerprint reader and a fingerprint reading method according to the present invention will be described with reference to FIG. 18. Incidentally, to omit the description the same reference numerals or simplified for the same components as the fingerprint reading apparatus and fingerprint reading method according to the first to third embodiments.
[0179]
　The basic configuration of the fingerprint reader according to the present embodiment is substantially the same as the fingerprint reader 10 according to the first embodiment. Fingerprint reader device according to the present embodiment, in terms related to the shape of the light guide portion of the side light source 112, is different from the fingerprint reader 10 according to the first embodiment.
[0180]
　Hereinafter will be described with reference to FIG. 18 for a specific configuration of the fingerprint reader device according to the present embodiment. Figure 18 is a plan view showing a fingerprint reading apparatus according to the present embodiment, showing the plane as the corresponding plane of the fingerprint reader 10 according to the first embodiment shown in FIG.
[0181]
　As shown in FIG. 18, the fingerprint reader 4010 according to the present embodiment, each of the pair of side light source 112, instead of the light guide portion 124 according to the first embodiment has a light guide part 4124. Incidentally, the light-transmitting material constituting the light guide part 4124 is similar to the light guide portion 124 according to the first embodiment.
[0182]
　Light guide section 4124 in each side light source 112, similar to the light guide portion 124 according to the first embodiment, are formed along the longitudinal direction of the mounting portion 102. The light guide part 4124 has a ridge-shaped protrusions 4126, and a skirt-like edge portion 4128. Protrusion 4126 is similar to the projecting portion 126 according to the first embodiment.
[0183]
　Edge end portion 4128, like the edge 128 of the first embodiment, on the side of the sensor surface 118 of the protrusion 4126, protrusion as continuously extending sensor surface 118 side from the projecting portion 4126 4126 It is formed integrally with the foot shape and. Edge end portion 4128, lower vertical height of the mounting portion 102 than the projection portion 4126, gradually the height is lower toward the sensor surface 118 side. And part edge end portion 4128 of the edge 4128 side of the protrusion 4126, as in the first embodiment, it is positioned overhang on the end portion of the sensor surface 118.
[0184]
　Furthermore, edge end portion 4128 is different from the edge portion 128 of the first embodiment, the overhang width has a portion not constant in width located overhangs on the ends of the sensor surface 118. Specifically, edge end portion 4128, in the front portion of the mounting portion 102, toward the front side of the mounting portion 102 along the longitudinal direction of the mounting portion 102, the projecting width is wider. Therefore, the distance between the edge 4128 at the edge 4128 and the other side light source 112 in one of the side light source 112, the front side of the mounting portion 102 along the longitudinal direction of the mounting portion 102 It is narrower as it goes.
[0185]
　Thus, the fingerprint reader 4010 according to this embodiment, the portion protruding width of the edge portion 4128 is wider at the front portion of the mounting portion 102 as described above, the sensor surface 118 of the finger to be read a fingerprint it can be more reliably supported from the side. Therefore, according to this embodiment, it is possible to more reliably suppress the positional deviation of the finger to be read a fingerprint. The portion projecting width of edge end portion 4128 is wider are the front portion of the mounting portion 102, nor interfere with the imaging of the fingerprint by the image sensor 108. Therefore, according to this embodiment, more suitably can read a fingerprint, it is possible to obtain a higher quality fingerprint images.
[0186]
　The feature of fingerprint, there are more tip than the base portion of the finger. Therefore, in this embodiment, as shown in FIG. 18, be edge end portion 4128 that corresponds to the root portion of the finger is present, since the tip of the finger is open, the sensor surface leading end portion of the finger can contact 118 can acquire a fingerprint image.
[0187]
　In the above has described the case of providing the light guide portion 4124 in place of the light guide portion 124 in the first embodiment, the light guide portion in place of the light guide portion 124 in the second and third embodiments 4124 it can be provided.
[0188]
　Fifth Embodiment
　will be explained with reference to FIG. 19 for the fingerprint reader and a fingerprint reading method according to a fifth embodiment of the present invention. Incidentally, to omit the description the same reference numerals or simplified for the same components as the fingerprint reading apparatus and fingerprint reading method according to the first to fourth embodiments.
[0189]
　The basic configuration of the fingerprint reader according to the present embodiment is substantially the same as the configuration of the fingerprint reader 10 according to the first embodiment. Fingerprint reader device according to the present embodiment, in terms related to the shape of the light guide portion of the side light source 112, is different from the fingerprint reader 10 according to the first embodiment.
[0190]
　Hereinafter will be described with reference to FIG. 19 for a specific configuration of the fingerprint reader device according to the present embodiment. Figure 19 is a plan view showing a fingerprint reading apparatus according to the present embodiment, showing the plane as the corresponding plane of the fingerprint reader 10 according to the first embodiment shown in FIG.
[0191]
　As shown in FIG. 19, the fingerprint reader 5010 according to the present embodiment, each of the pair of side light source 112, instead of the light guide portion 124 according to the first embodiment has a light guide part 5124. Incidentally, the light-transmitting material constituting the light guide part 5124 is similar to the light guide portion 124 according to the first embodiment.
[0192]
　Light guide section 5124 in each side light source 112, similar to the light guide portion 124 according to the first embodiment, are formed along the longitudinal direction of the mounting portion 102. The light guide part 5124 has a ridge-shaped protrusions 5126, and a skirt-like edge portion 5128. Protrusion 5126 is similar to the projecting portion 126 according to the first embodiment.
[0193]
　Edge end portion 5128, like the edge 128 of the first embodiment, on the side of the sensor surface 118 of the protrusion 5126, protrusion as continuously extending sensor surface 118 side from the projecting portion 5126 portion 5126 It is formed integrally with the foot shape and. Edge end portion 5128, lower vertical height of the mounting portion 102 than the projection portion 5126, gradually the height is lower toward the sensor surface 118 side. Edge 5128 side of the part and the edge end portion 5128 of the protrusion 5126, as in the first embodiment, are positioned overhang on the end portion of the sensor surface 118.
[0194]
　Furthermore, in the present embodiment, a continuous and edge 5128 of one of the lateral light source 112, and the edge 5128 of the other side light source 112, to each other on the sensor surface 118 extending over the sensor surface 118 It is formed so as to. The lower surface of the edge end portion 5128 that extends over the sensor surface 118, the light blocking portion 130 similar to the first embodiment is formed.
[0195]
　The central portion of the edge end portion 5128 that extends over the sensor surface 118, opening 5130 for exposing the sensor surface 118 is formed. Opening 5130, in a case where the image sensor 108 and the sensor cover 110 is positioned at the imaging position, shape and area of ​​the sensor surface 118 capable of reading a fingerprint is formed so as to expose. The planar shape of the opening 5130 is not particularly limited, for example, oval in shape and is fingertip-shape.
[0196]
　Thus, the fingerprint reader 5010 according to this embodiment, the portion other than the opening portion 5130 of the edge end portion 5128 that extends across the sensor surface 118 as described above, from the finger to be read a fingerprint from the sensor surface 118 side it is possible to reliably support. Therefore, according to this embodiment, it is possible to more reliably suppress the positional deviation of the finger to be read a fingerprint. Further, since the image sensor 108 through the opening 5130 can image a fingerprint, it no hindered imaging of the fingerprint by the image sensor 108. Therefore, according to this embodiment, more suitably can read a fingerprint, it is possible to obtain a higher quality fingerprint images.
[0197]
　Also, in this embodiment, as shown in FIG. 19, even in the presence of edge end portion 5128 that corresponds to the base of the finger, since the front end portion of the feature is large fingerprint of the finger is open, the finger it can tip the contacts on the sensor surface 118 can acquire a fingerprint image.
[0198]
　In the above has described the case of providing the light guide portion 5124 in place of the light guide portion 124 in the first embodiment, the light guide portion in place of the light guide portion 124 in the second and third embodiments 5124 it can be provided.
[0199]
　Sixth Embodiment
　A sixth embodiment fingerprint reader and a fingerprint reading method according to the present invention will be described with reference to FIG. 20. Note that the above description of the same components as the fingerprint reading apparatus and fingerprint reading method according to the first to fifth embodiments will not be described denoted by the same reference numerals or simplified.
[0200]
　In the first to fifth embodiments, neonates, infants and young children, there has been described a case where a subject to be read a fingerprint, the subject is not intended to be limited neonates, infants and young children. Fingerprint reader, neonatal, other than infants and young children can be a subject who of all ages.
[0201]
　In this embodiment, the fingerprint reader, neonatal, not infants and young children only, newborns, the case also with the subject persons other than infants and young children. In addition, newborns, to persons other than infants and young children are included newborns, minors other than infants and young children, and the adult's. In the following description, newborns, infants and young children referred to as "the newborn, etc.", the newborn, a person other than infants and young children referred to as "adult, etc.".
[0202]
　The basic configuration of the fingerprint reader according to this embodiment of the subject neonates like and adult person, etc., is almost the same as the configuration of the fingerprint reader 10 according to the first embodiment. Fingerprint reader device according to the present embodiment, in order to also subject the adult and others, in terms related to the shape of the light guide portion of the side light source 112, it is different from the fingerprint reader 10 according to the first embodiment.
[0203]
　Hereinafter will be described with reference to FIG. 20 for a specific configuration of the fingerprint reader device according to the present embodiment. Figure 20 is a transverse sectional view showing a fingerprint reading apparatus according to the present embodiment, showing a cross-section corresponding to the cross section of the fingerprint reading apparatus 10 according to the first embodiment shown in FIG. Incidentally, in FIG. 20, for comparison, shows a light guide portion 124 according to the first embodiment by a chain line.
[0204]
　As shown in FIG. 20, the fingerprint reader 6010 according to the present embodiment, each of the pair of side light source 112, instead of the light guide portion 124 according to the first embodiment has a light guide part 6124. Incidentally, the light-transmitting material constituting the light guide part 6124 is similar to the light guide portion 124 according to the first embodiment.
[0205]
　Light guide section 6124 in each side light source 112, similar to the light guide portion 124 according to the first embodiment, are formed along the longitudinal direction of the mounting portion 102. The light guide part 6124 has a ridge-shaped protrusions 6126, and a skirt-like edge portion 6128.
[0206]
　Protrusion 6126, like the protruding portion 126 according to the first embodiment, are formed in a ridge shape so as to project over the plurality of near-infrared LED122 above the housing 106 surfaces. However, the protruding portion 6126 is different from the protruding portion 126 according to the first embodiment, without overhang on the end portion of the sensor surface 118 is formed so as not located on an end portion of the sensor surface 118.
[0207]
　Edge end portion 6128, like the edge 128 of the first embodiment, on the side of the sensor surface 118 of the protrusion 6126, protrusion as continuously extending sensor surface 118 side from the projecting portion 6126 portion 6126 It is formed integrally with the foot shape and. Edge end portion 6128 is lower vertical height of the mounting portion 102 than the projection portion 6126, gradually the height is lower toward the sensor surface 118 side. In the present embodiment, a portion of the edge end portion 6128 is located overhangs on the ends of the sensor surface 118.
[0208]
　On the lower surface of the part of the sensor surface 118 side of the edge end portion 6128 is a portion located overhangs on the ends of the sensor surface 118 of the light guide portion 124, the light shielding portion 130 is provided as in the first embodiment ing.
[0209]
　The width projecting is a width which is located partially on the end of the sensor surface 118 projects the edge end portion 6128 not only fingerprints of newborn like, so that it can also read a fingerprint, such as adult's it can be set appropriately.
[0210]
　Thus, in the present embodiment, the projecting portion 6126 is not flared over the end of the sensor surface 118, only a portion of the edge portion 6128 of the light guide portion 6124 is, on the end of the sensor surface 118 overhang and is located in. Therefore, in the present embodiment, since the wide space compared to the first embodiment is secured on the sensor surface 118, the contact fingers such as big adult person the sensor surface 118 as compared to the finger newborns such it can be. Thus, in the present embodiment, as in the first embodiment, not only the newborn and the like, can read the fingerprint, such as adult person.
[0211]
　In the case of reading a fingerprint, such as adult person as the subject, the subject's own such adult operates the fingerprint reader 6010 can read the fingerprint of his fingers. In this case, the subject, while holding the holding portion 104 at the opposite hand and of itself to be imaged fingerprint finger is contacting the ball of the finger to be imaged fingerprint sensor surface 118 of the sensor cover 110 it can. Subjects, for example, among the fingers gripping the grip portion 104, the thumb is positioned on the top plate side of the housing 106, the gripping portion as 4 fingers other than the thumb is positioned on the bottom plate side of the housing 106 104 can be grasped from the side.
[0212]
　Subject, such as adult who holds the grip portion 104, a gripping portion 104 while grasping, with either four-finger positioned on the bottom plate side of the housing 106 of the fingers gripping the grip portion 104 it can be pressed to move the switch 142 and the capture switch 144. By subject himself operates the mobile switch 142 and capture switch 144, it is possible to read the fingerprint of the subject in the same manner as in the first embodiment. Even when reading a fingerprint of a finger, such as adult person, for example, wet, high water retention capacity, due to the influence of such high water ratios, the finger can greatly elastically deformed. According to this embodiment, even in the case of reading a fingerprint of a finger, such as adult's, reduce the elastic deformation occurring in the finger like the first embodiment, to read a fingerprint from further eliminated, the fingerprint appropriate can be read, it is possible to obtain a high-quality fingerprint images.
[0213]
　On the other hand, when reading the fingerprint of the newborn such as subject, it is possible to read the fingerprint of the subject in the same manner as in the first embodiment.
[0214]
　In the above has described the case of providing the light guide portion 6124 in place of the light guide portion 124 in the first embodiment, the light guide portion in place of the light guide portion 124 in the second and third embodiments 6124 it can be provided.
[0215]
　Further, in the fourth and fifth embodiment, as in the present embodiment, it is possible to protrusions 4126,5126 forms a light guide portion 4124,5124 so as not located on the end of the sensor surface 118.
[0216]
　[Seventh Embodiment]
　A seventh fingerprint reader and a fingerprint reading method according to an embodiment of the present invention will be described with reference to FIG. 21. Incidentally, to omit the description the same reference numerals or simplified for the same components as the fingerprint reading apparatus and fingerprint reading method according to the first to sixth embodiments.
[0217]
　In the first embodiment, the sensor cover 110 including an image sensor 108 and the sensor surface 118 has been described as being provided swingably by hinges 120, but is not limited thereto. Sensor cover includes an image sensor 108 and the sensor surface 118 110 may be provided to be fixed to the portion 102 mounting in the housing 106 so as to be positioned at the imaging position.
[0218]
　In this embodiment, the sensor cover 110 including an image sensor 108 and the sensor surface 118, will be described which is provided fixed to the mounting portion 102 so as to be positioned at the imaging position.
[0219]
　The basic configuration of the fingerprint reader according to the present embodiment is substantially the same as the fingerprint reader 10 according to the first embodiment. Fingerprint reader device according to the present embodiment, that the sensor cover 110 including an image sensor 108 and the sensor surface 118 is fixed, and in that the sensor driving unit 114 Along with this is not provided, a fingerprint according to the first embodiment It is different from the reader 10.
[0220]
　Hereinafter will be described with reference to FIG. 21 for a specific configuration of the fingerprint reader device according to the present embodiment. Figure 21 is a longitudinal sectional view showing a fingerprint reading apparatus according to the present embodiment and shows a longitudinal section corresponding to the longitudinal section of the fingerprint reading apparatus 10 according to the first embodiment shown in FIG.
[0221]
　As shown in FIG. 21, the fingerprint reader 7010 according to this embodiment, unlike the first embodiment, the hinge portion 120 is not used, the image sensor 108, for example, housing via the fixing member 7116 It is fixed to the mounting portion 102 in 106. The fixing member 7116 fixes the image sensor 108 in the bottom of the mounting portion 102. Sensor cover 110 including an image sensor 108 and the sensor surface 118 that is fixed to the mounting portion 102 is positioned at the imaging position of the same as the first embodiment. A desirable mode for fixing the sensor cover 110 including an image sensor 108 and the sensor surface 118 is not limited in particular, it can be fixed in various ways.
[0222]
　Thus, in this embodiment, the sensor cover 110 including an image sensor 108 and the sensor surface 118 is provided fixed to the mounting portion 102 so as to be positioned at the imaging position. Since the image sensor 108 and the sensor cover 110 is fixed, in this embodiment, the sensor driving unit 114 is not provided.
[0223]
　As in this embodiment, the sensor cover 110 including an image sensor 108 and the sensor surface 118 may be provided fixed to the mounting portion 102 so as to be positioned at the imaging position.
[0224]
　[Eighth Embodiment]
　The eighth embodiment fingerprint reader and a fingerprint reading method according to the present invention will be described with reference to FIG. 22. Incidentally, to omit the description the same reference numerals or simplified for the same components as the fingerprint reading apparatus and fingerprint reading method according to the first to the seventh embodiments.
[0225]
　In the first to the seventh embodiments, the case has been described where the user or subject to read the fingerprint by pressing the movement switch 142 and capture switch 144, the reading of the fingerprint can be automated. In the present embodiment, in the first embodiment, a case will be described in which automated reading of the fingerprint.
[0226]
　In the present embodiment, the image processing apparatus 20 in the fingerprint reading system 1 is configured to automate the reading of the fingerprint by the fingerprint reader 10. In the present embodiment, the image processing apparatus 20 and the fingerprint reader 10 is configured as follows.
[0227]
　In the image processing apparatus 20, CPU 202 functions as a control unit which controls the operation of the fingerprint reading apparatus 10 includes a sensor driver 114 and the image sensor 108 to automate the reading of the fingerprint by the fingerprint reader 10. CPU202, in response to the read instruction signal to instruct reading of the fingerprint is input through the fingerprint reader 10 outputs to the communication cable 30 a control signal for controlling the fingerprint reader 10. Control signal is a signal for automating the reading of the fingerprint by the fingerprint reader 10. Control signal includes a driving instruction signal for instructing driving of the image sensor 108 and the sensor cover 110, and an imaging instruction signal instructing the imaging of the fingerprint after driving of the image sensor 108 and the sensor cover 110.
[0228]
　Fingerprint reader 10 and the image processing apparatus 20, for example, the user presses the capture switch 144, the read instruction signal for instructing the reading of the fingerprint in the image processing apparatus 20 via the fingerprint reader 10 is input it can be configured to so that. The image processing apparatus 20, the user operates the input device 218 may be configured to read an instruction signal for instructing the reading of the fingerprint is input.
[0229]
　Further, in the image processing apparatus 20, CPU 202 also functions as a determination unit determining the quality of the quality of the fingerprint image to be transferred from the fingerprint reader 10. CPU202, based on the criteria regarding the quality of the fingerprint image, determining the acceptability of the quality of the fingerprint image to be transferred from the fingerprint reader 10. CPU202, the quality of the fingerprint image is determined to be good, the quality of the fingerprint image is defective if the quality of the fingerprint image is not predetermined quality or if the quality of the fingerprint image is a predetermined quality or higher It determines that.
[0230]
　CPU202, if the quality of the fingerprint image is determined to be defective, and inputs the fingerprint reader 10 outputs a control signal and a drive instruction signal and the imaging instruction signal of the re. Thus, CPU 202, based on the determination result of the quality of the quality of the fingerprint image, and controls the operation of the sensor driving unit 114 by a drive instruction signal, which functions as a control unit for controlling the operation of the image sensor 108 by the imaging instruction signal.
[0231]
　On the other hand, the fingerprint reader 10, CPU 166, based on the control signal inputted from the image processing apparatus 20, drives the sensor driver 114 and the image sensor 108. Specifically, CPU 166 is included in the control signal, in response to a drive instruction signal for instructing driving of the image sensor 108 and the sensor cover 110, drives the sensor drive unit 114. Accordingly, sensor cover 110 including an image sensor 108 and the sensor surface 118, similarly to the first embodiment, moved to the retracted position from the imaging position to return to move the imaging position from the further retracted position. Further, CPU 166 is included in the control signal, in response to the imaging instruction signal instructing the imaging of the fingerprint after driving of the image sensor 108 and the sensor cover 110, similarly to the first embodiment, the lighting of a side light source 112 in to read by imaging a fingerprint image sensor 108.
[0232]
　The operation of the fingerprint reader 10 and the image processing apparatus 20 according to the present embodiment will be explained with reference to FIG. 22. Figure 22 is a flowchart showing the operation of the fingerprint reading apparatus and an image processing apparatus according to this embodiment.
[0233]
　First, the user, similarly to the first embodiment, with the sensor cover 110 including an image sensor 108 and the sensor surface 118 is positioned at the imaging position, belly of the subject's finger, the fingerprint reader 10 sensor contacting the surface 118 (step S102).
[0234]
　The user then, for example, using the input device 218, inputs a reading instruction signal to instruct the reading of the fingerprint in the image processing apparatus 20 (step S202).
[0235]
　Then, CPU 202 of the image processing apparatus 20, in response to the fingerprint reading signal inputted by the user, and outputs a control signal for controlling the fingerprint reader 10 is inputted to the fingerprint reader 10 (step S204). Control signal includes a driving instruction signal for instructing driving of the image sensor 108 and the sensor cover 110, and an imaging instruction signal instructing the imaging of the fingerprint after driving of the image sensor 108 and the sensor cover 110. Also in this embodiment, when the ball of the finger has come into contact with the structure as well as the sensor surface 118 without the mobile switch 142 is detected, without waiting for an input of an instruction signal reading by the user, similarly to the above drive instruction signal and the imaging instruction signal may be inputted to the fingerprint reader 10.
[0236]
　Then, CPU 166 of the fingerprint reader 10, based on the control signal inputted from the image processing apparatus 20, as described below, drives the sensor drive unit 114, then to image the fingerprint image sensor 108 (step S104, S106).
[0237]
　First, CPU 166, in response to the drive instruction signal included in the control signal inputted from the image processing apparatus 20, drives the sensor drive unit 114 (step S104). Accordingly, sensor cover 110 including an image sensor 108 and the sensor surface 118, similarly to the first embodiment, moved to the retracted position from the imaging position to return to move the imaging position from the further retracted position. Also in this embodiment, as the trigger the rear end of the image sensor 108 and the sensor cover 110 is switched increase the descent, it is possible to use the same trigger in the first embodiment.
[0238]
　Then, CPU 166, in response to the imaging instruction signal included in the control signal inputted from the image processing apparatus 20, similarly to the first embodiment, by capturing the fingerprint image sensor 108 in the lighting of a side light source 112 to read (step S106).
[0239]
　Image data of the captured fingerprint image by the image sensor 108, as in the first embodiment, is transferred to the image processing apparatus 20 via the communication cable 30 (step S108). The image data transferred fingerprint image to the image processing apparatus 20, predetermined image processing is performed as in the first embodiment.
[0240]
　Then, CPU 202 of the image processing apparatus 20, based on the criteria regarding the quality of the fingerprint image, it is determined whether good quality of the transferred fingerprint image from the fingerprint reader 10 (step S206).
[0241]
　CPU202, when the quality of the fingerprint image is determined to be good (step S206, YES), similarly to the first embodiment, display of the fingerprint image, performs recording or the like (step S208).
[0242]
　Meanwhile, CPU 202, when the quality of the fingerprint image is determined to be defective (step S206, NO), the process proceeds to step S204, the fingerprint reader outputs a control signal and a drive instruction signal and the imaging instruction signal of the re to re-enter to the apparatus 10. Incidentally, CPU 202 can, for the determined fingerprint image to be defective, it is also possible to perform the same display or the like in the first embodiment.
[0243]
　CPU166 fingerprint reader 10 a control signal is inputted again from the image processing apparatus 20 executes steps S104, S106, S108 again. Thus, the image data again acquired fingerprint image in the fingerprint reading apparatus 10 is transferred again to the image processing apparatus 20. By step S104 to drive the sensor driver 114 is executed again, a reduction in the elastic deformation of the finger is a cause of deterioration in quality of the fingerprint image, eliminates is attempted.
[0244]
　CPU202 of the image processing apparatus 20 in which the image data of the fingerprint image is transferred again executes step S206 again.
[0245]
　Thus, the reading of the fingerprint in the fingerprint reader 10 to a predetermined quality or more fingerprint images are acquired is repeated.
[0246]
　Thus, in the present embodiment, to automate the reading of fingerprint controls the fingerprint reader 10 by the image processing apparatus 20. Furthermore, in the present embodiment, based on the result of the quality determination of the quality of the fingerprint image in the image processing apparatus 20, the reading of the fingerprint in the fingerprint reader 10 to a predetermined quality or more fingerprint images are acquired is repeated. Therefore, according to this embodiment, it is possible to obtain a high-quality fingerprint images efficiently.
[0247]
　Further, in the above, CPU 202 of the image processing apparatus 20 has described the case that functions as a determination unit and a control unit for automating the reading of the fingerprint by the fingerprint reading apparatus 10 controls the operation of the fingerprint reader 10, to the present invention is not limited. For example, CPU 166 of the control circuit 116 of the fingerprint reader 10 itself, function as all or part of the determination unit and a control unit for automating the reading of the fingerprint by the fingerprint reading apparatus 10 similarly to CPU202 of the image processing apparatus 20 it may be.
[0248]
　Further, in the above has described the case where automated reading of the fingerprint in the first embodiment, it is possible to automate the reading of the fingerprint as in the in the second to sixth embodiments.
[0249]
　Other Embodiments
　fingerprint reader described in the above embodiments, according to other embodiments, it may be configured as shown in FIG. 23. Figure 23 is a block diagram showing the functional configuration of the fingerprint reader according to another embodiment.
[0250]
　As shown in FIG. 23, the read fingerprint according to another embodiment device 8000, chromatic and mounting portion 8002 of the finger is placed, and a reading surface 8004, wherein the finger placed on the placing portion 8002 contacts are doing. Also, the fingerprint reader 8000 is provided on the placing portion 8002 has a pair of light source 8006 for emitting light to placed on the placing portion 8002 finger. Furthermore, the fingerprint reader 8000, the fingerprint of a finger in contact with the reading surface 8004, and a reading unit 8008 read by the imaging by the light scattered is emitted from the surface of the finger in the finger. A pair of light sources 8006 are provided on both sides of the opposite ends of the reading surface 8004, in the width direction of the mounting portion 8002. The pair of light source 8006 includes a light guide part 8010 formed along the longitudinal direction of the mounting portion 8002, respectively. The light guide part 8010 is formed so as to extend to the end of the reading surface 8004.
[0251]
　According to the fingerprint reader 8000 according to another embodiment, it is possible to suppress the positional displacement with respect to the reading surface of the finger to be read a fingerprint.
[0252]
　[Modified Embodiments]
　The present invention is not limited to the above embodiments, and various modifications are possible.
[0253]
　For example, in the above-described embodiments, the case of using the image sensor 108 is a reading unit of the optical reading by imaging the fingerprint as an example, but is not limited thereto. The reading section reads the fingerprint, other optical, can be used capacitive type, those of various systems such as a field intensity method.
[0254]
　In the above embodiment has described the case where the image sensor 108 with the sensor cover 110 including a sensor surface 118 that the finger is in contact is driven by the sensor drive unit 114 as an example, not limited thereto. Well if at least the sensor surface 118 is driven as in the above embodiment, other reading unit the image sensor 108 capable of reading a fingerprint of a finger contacting the sensor surface 118 positioned at the imaging position is separated from the sensor surface 118 and it may be fixed in position.
[0255]
　Some or all of the above embodiments, can be described as the following notes, not limited to the following.
[0256]
　(Supplementary Note 1)
　and mounting portion which the finger is placed,
　the reading surface of the finger placed on the mounting section is in contact,
　provided in the mounting table, placed on the placement section a pair of light sources for emitting light to the finger,
　the fingerprint of the finger in contact with the reading surface, and a reading unit to read by imaging by the light scattered by and emitted from the surface of the finger in said finger ,
　the pair of light source,
　　the reading surface, provided on both sides of the opposite ends in the width direction of the mounting section,
　　has a light guiding portion which is formed along the longitudinal direction of the mounting section, respectively ,
　the light guide portion is formed so as to extend up over the end of the reading face
　fingerprint reader, characterized in that.
[0257]
　(Supplementary Note 2)
　The light guide is configured the finger placed on the placement section to be supported
　fingerprint reader according to Supplementary Note 1, wherein the.
[0258]
　(Supplementary Note 3)
　The pair of light sources is inclined toward the inside of the reading face
　fingerprint reading apparatus according to supplementary note 1 or 2, characterized in that.
[0259]
　(Supplementary Note 4)
　Each of the pair of light sources has a plurality of unit light sources disposed along the longitudinal direction of the mounting section,
　formed as the light guide portion, covering the plurality of unit light sources are
　the fingerprint reading apparatus according to any one of Appendixes 1 to 3, wherein the.
[0260]
　(Supplementary Note 5)
　The light guide portion is
　a projecting portion for covering the plurality of unit light sources,
　wherein the projecting portion is of the reading surface the projecting portion integrally formed on the side of the vertical direction of the mounting section height and a lower edge portion than the protrusion of
　having
　a fingerprint reading apparatus according to Supplementary note 4, wherein the.
[0261]
　(Supplementary Note 6)
　portion and the edge portion of the projecting portion is positioned on the end of the reading face
　fingerprint reader Supplementary Note 5, wherein the.
[0262]
　(Supplementary Note 7)
　a portion of the edge is positioned on the end of the reading face
　fingerprint reader Supplementary Note 5, wherein the.
[0263]
　(Supplementary Note 8)
　width positioned on the end of the reading surface of the edge portion is wider toward the front side of the mounting table
　according to any one of Appendixes 5 to 7, characterized in that of the fingerprint reader.
[0264]
　(Supplementary Note 9)
　The edges of the one and the other of the light guide portions of the pair of light sources are formed to be continuous to each other on the scanning surface,
　the edge, the reading surface opening exposed is formed a
　fingerprint reading apparatus according to any one of Appendixes 5 to 7, characterized in that.
[0265]
　(Supplementary Note 10)
　having a light-shielding portion formed on the lower surface of the portion located on the end of the reading surface of the light guide portion
　fingerprint reading apparatus according to any one of Appendixes 1 to 9, characterized in that.
[0266]
　Although the invention has been described with reference to the embodiments, the present invention is not limited to the above-described exemplary embodiments. The configuration and details of the present invention can be various modifications that those skilled in the art can understand within the scope of the present invention.
[0267]
　This application claims priority based on Japanese Patent Application No. 2017-144533, filed on July 26, 2017, the entire disclosure of which is incorporated herein.
DESCRIPTION OF SYMBOLS
[0268]
1 ... fingerprint reading system
10,2010,3010,4010,5010,6010,7010,8000 ... fingerprint reader
20 ... image processing apparatus

WE claims

[Requested item 1]
　A mounting portion which the finger is placed,
　a reading surface on which the finger is in contact placed on the mounting section,
　provided in the mounting table, the light on the finger placed on the placement section a pair of light source for irradiating,
　the fingerprint of the finger in contact with the reading surface, and a reading section to read and imaged by light emitted from the surface of said scattered in said finger finger
　of the pair light source,
　　the reading surface, provided on both sides of the opposite ends in the width direction of the mounting section,
　　has a light guiding portion which is formed along the longitudinal direction of the mounting section, respectively,
　the light guide parts is formed so as to extend up over the end of the reading face
　fingerprint reader, characterized in that.
[Requested item 2]
　The light guide portion, the finger placed on the placement section is supported capable constructed
　fingerprint reading apparatus according to claim 1, wherein a.
[Requested item 3]
　It said pair of light sources is inclined toward the inside of the reading face
　fingerprint reading apparatus according to claim 1 or 2, characterized in that.
[Requested item 4]
　Each of the pair of light sources has a plurality of unit light sources disposed along the longitudinal direction of the mounting section,
　the light guide portion is formed so as to cover the plurality of unit light sources
　that fingerprint reading apparatus according to any one of claims 1 to 3, wherein.
[Requested item 5]
　The light guide portion,
　a projecting portion for covering the plurality of unit light sources,
　wherein the projecting portion is of the reading surface the projecting portion integrally formed on the side of the upper and lower direction of the height of the placement section protrudes and low edges than part
　having a
　fingerprint reading apparatus according to claim 4, wherein a.
[Requested item 6]
　Said portion and said edge portion of the protruding portion is positioned on the end of the reading face
　fingerprint reading apparatus according to claim 5, wherein a.
[Requested item 7]
　It said portion of the edge is positioned on the end of the reading face
　fingerprint reading apparatus according to claim 5, wherein a.
[Requested item 8]
　Width positioned on the end of the reading surface of the edge portion is wider toward the front side of the mounting table
　according to any one of claims 5 to 7, characterized in that fingerprint reader.
[Requested item 9]
　The edges of the one and the other of the light guide portions of the pair of light sources are formed to be continuous to each other on the scanning surface,
　open to the edge portion, which exposes the reading surface parts are formed
　fingerprint reading apparatus according to any one of claims 5 to 7, characterized in that.
[Requested item 10]
　Having a light shielding portion formed on the lower surface of the portion located on the end of the reading surface of the light guide portion
　fingerprint reading apparatus according to any one of claims 1 to 9, wherein the.