DESCRIPTION
TITLE OF INVENTION
LED Illumination Device and Rail Vehicle Using Same
5 TECHNICAL FIELD
[OOOl]
The present invention relates to an LED illumination device
that performs illumination by an LED light emitting element, and a
rail vehicle using the same.
10 BACKGROUND ART
[0002]
1 For example, in case of a fluorescent light as an illumination
device, since it is possible to irradiate light over the almost
entire circumference of the fluorescent light, it is suited to
15 illuminate not only a bottom face but also a ceiling face which is
an installation face and side wall faces as illumination of a room.
There is described, for example, in Patent Document 1, the one which
is configured to laterally irradiate light emitted from a
fluorescent light by providing a light passing opening in a side
20 face of the illumination device (see Fig. 1) .
[0003]
On the other hand, various LED illumination lights using light
emitting diodes (LED: Light Emitting Diode) are proposed and
adoption thereof in a rail vehicle is now being discussed from the
25 viewpoint of energy saving. Although since the LED is low in power
consumption and long in life in comparison with the fluorescent
light, it is gathering attention in recent years as a luminaire,
laterally-directed illumination light cannot be expected by the LED
element alone because it is high in directivity in general.
5 [0004]
There is described, in Patent Document 2, an illumination
device that a plurality of luminaires, each being formed by mounting
LED elements on a substrate, are prepared and they are installed in
a transparent tube by individually changing their directions so as
10 to obtain laterally-directed illumination light (see Fig. 15).
[0005]
In addition, there is described, in Patent Document 3, an
illumination device that two substrates on each of which a plurality
of LED elements are mounted are prepared and they are installed in
15 opposition in a linear tube so as to obtain illumination light from
the almost entire circumference of the tube (see Fig. 2, Fig. 3).
Further, there is also described, in Patent Document 3, a
configuration that a reflecting surface is provided within the tube
and emitted light from the LED element is reflected by this
20 reflecting surface so as to obtain the laterally-directed
illumination light (see Fig. 4 to Fig. 7) .
[0006]
Further, there is disclosed, in Patent Document 4, an
illumination device of a shelf structure which is provided with a
25 light emitting element array and can be attached to a lower face or
25 compartment with a predetermined illuminance along its full length,
a lower part of a tray, and the illumination device of the shelf
structure that there are provided a frame which can be attached to
the lower face or the lower part of the tray, the light emitting
element array which can be mounted within this frame, and a
5 transparent part formed in at least one region of a forward region,
an upper region and a lower region of the afore-mentioned frame, and
the afore-mentioned transparent part can be illuminated with emitted
light from the afore-mentioned light emitting element array.
RELATED ART-DOCUMENTS
10 PATENT DOCUMENT
[0007]
Patent Document 1: Japanese Patent Application Laid-Open No.
2007-273385 A
Patent Document 2: Japanese Patent Application laid-Open No.
15 2002-197901 A
Patent Document 3: Japanese Patent Application Laid-Open No.
2011-508380 A
Patent Document 4: Japanese Patent Application Laid-Open No.
2010-251294 A
20 SUMMARY OF THE INVENTION
PROBLEMS TO BE SOLVED BY THE INVENTION
[0008]
A vehicle, in particular, a rail vehicle is long in lengthwise
direction, and in order to uniformly illuminate the inside of the
5
a plurality of illumination devices, in general, long-sized
fluorescent lights are continuously provided on the ceiling of the
vehicle in a longitudinal direction as a main illumination device
for compartment. There are many cases when in illumination of light
5 from the illumination device, light distribution to lateral parts is
also needed in addition to making it emit light as a main light
emitting face in order to uniformly illuminate the inside of the
compartment.
[0009]
10 However, it is difficult to apply the device described in
Patent Document 1 that use of the fluorescent light is premised to
the main illumination device for compartment using the LED
illumination light as it is.
[ 0 0 10 ]
15 In addition, in the LED illumination light described in the
above-mentioned Patent Document 2, it is necessary to prepare the
plurality of LED elements which are respectively surface-mounted on
different substrates and to assemble them into the transparent tube,
and the configuration of the entire device is complicated. In
20 addition, in the LED illumination light describe in Patent Document
3, it is necessary to prepare two substrates on each of which the
plurality of LED elements are mounted and to assemble them into the
tube. In addition, it is necessary to provide a new reflecting
surface within the tube and the configuration of the entire device
25 becomes complicated similarly.
[ OOll]
Incidentally, although it can be conceived to dispose a lens
in front of the LED element so as to laterally refract the emitted
light from the LED element in order to laterally distribute the
5 light emitted from the LED element, since the lens is needed for
each LED element in a case where the illumination device is
configured by many LED elements, the entire device is complicated
similarly. Also in the illumination device of shelf structure
described in Patent Document 4, it is necessary to install an
10 orientation member (a reflection member) that orients light from the
light emitting element array toward the lateral transparent part
within the frame corresponding to each LED element in order to
laterally refract the emitted light, and the configuration within
the frame becomes complicated.
15 [0012]
In addition, in a case where the conventional illumination
device having the lateral light distribution function is mounted on
the rail vehicle, since the structure is complicated, there were
such problems that time is taken for detaching the illumination
20 device main body from the rail vehicle and for dismantling the
illumination device main body and maintenance of the vehicle is
time-consuming.
[0013]
The present invention has been made in view of the
25 conventional circumstances as mentioned above, and an object of the
present invention is to provide an LED illumination device capable
of implementing distribution of light to the main light emitting
surface and lateral sides by a simple mechanism.
MEANS OF SOLVING THE PROBLEMS
5 [0014]
In order to solve the above-mentioned problems, the present
invention adopts a configuration that a substrate on which a
plurality of LED light emitting elements are mounted is fixed to a
frame provided with a bottom face to which the substrate is to be
I 10 fixed and side wall faces relative to the bottom face, and a face of
the frame facing the afore-mentioned bottom face is formed as an
open face such that light radiated from the afore-mentioned LED
~ 1
light emitting element is irradiated to the outside through the open
face.
15 [0015]
In addition to this, a transparent plate which makes some of
the light emitted from the afore-mentioned LED light emitting
element pass and makes some thereof reflect or scatter is provided
in the vicinity of the afore-mentioned open face. An aperture is
20 provided in a side wall face of the above-mentioned frame, through
which the light reflected or scattered can be distributed to the
lateral side of the illumination device by a diffusion plate.
On the other hand, the above-mentioned open face is covered by
attaching an ornamental cover from the open face side. The above-
25 mentioned transparent plate is fixed to this ornamental cover, and
the light passing through the diffusion sheet is distributed to a
lower side of the illumination device through the transparent sheet.
EFFECTS OF THE INVENTION
[0016]
According to the present invention, the LED illumination
device which allows light distribution to the main light emitting
surface and the lateral side of the illumination device main body
can be implemented without such complicated mechanisms as described
in the afore-mentioned prior art Documents, without such an
10 additional mechanism that, for example, the plurality of substrates
with the LED light emitting elements mounted are installed in the
transparent tube in different directions, or the two substrates with
the plurality of LED light emitting elements mounted are installed
in opposition within the tube, or the new reflecting surface is
15 provided within the tube.
In addition, since the structure of the entire device is
simplified, it becomes also possible to implement an extremely thin
LED illumination device.
BRIEF DESCRIPTION OF THE DRAWINGS
20 [0017]
Fig. 1A is a rear view of an LED illumination device according
to an embodiment 1 of the present invention.
Fig. 1B is a right-side view of the LED illumination device of
the embodiment 1.
Fig. 1C is a front view of the LED illumination device of the
embodiment 1.
Fig. ID is a schematic diagram showing a one-car rail vehicle
with the LED illumination device mounted as an application example
5 of the present invention.
Fig. 1E is an almost longitudinal sectional diagram of the
train vehicle in Fig. ID.
Fig. 2A is a diagram showing the II-II line section of the LED
illumination device shown in Fig. 1B in a state that a frame is
10 separated from an ornamental cover.
Fig. 2B is the II-II line sectional diagram of the LED
illumination device shown in Fig. 1B.
Fig. 3 is a detailed diagram of a partial section of a
longitudinal end part (the V part) of the LED illumination device
15 shown in Fig. 1B.
Fig. 4 is a front view of a substrate on which LED light
emitting elements are mounted.
Fig. 5 is a diagram explaining an electrical connection
relation among the plurality of substrates to be mounted on the LED
20 illumination device.
Fig. 6 is a diagram showing the VI-VI line section of the LED
illumination device shown in Fig. 1B.
Fig. 7 is a diagram for explaining an optical path of light
emitted from the LED light emitting element of the embodiment 1.
Fig. 8 is a schematic diagram for explaining an advantageous
effect of a side edge part of an ornamental cover.
Fig. 9 is a detailed diagram of a partial section pertaining
to a modified example of a longitudinal end part of the LED
5 illumination device.
Fig. 10 is a schematic diagram for explaining a configuration
and an advantageous effect of an extended part of the ornamental
cover of the LED illumination device according to an embodiment 2 of
the present invention.
10 Fig. 11 is a schematic diagram for explaining a configuration
I and an advantageous effect of an extended part of the ornamental I ~
cover of the LED illumination device according to a modified example
of the embodiment 2 of the present invention.
Fig. 12 is a sectional diagram of an LED illumination device
15 according to an embodiment 3 of the present invention.
Fig. 13A is a sectional diagram of an LED illumination device
according to an embodiment 4 of the present invention.
Fig. 13B is a sectional diagram of an LED illumination device
pertaining to a modified example of the embodiment 4.
Fig. 14 is a diagram showing one example of an attachment mode
of a power source unit integrated type LED illumination device
according to an embodiment 5 of the present invention.
Fig. 15 is diagram showing another example of the attachment
mode of the power source unit integrated type LED illumination
25 device according to the embodiment 5 of the present invention.
Fig. 16 is a diagram showing a further example of the
attachment mode of the power source unit integrated type LED
illumination device according to the embodiment 5 of the present
invention.
Fig. 17 is a diagram showing a still further example of the
attachment mode of the power source unit integrated type LED
illumination device according to the embodiment 5 of the present
invention.
MODE FOR CARRYING OUT THE INVENTION
10 [0018]
Embodiments of the LED illumination device of the present
invention will be described with reference to the drawings.
EMBODIMENT 1
[0019]
In the following, an LED illumination device pertaining to the
embodiment 1 of the present invention will be described.
In Fig. lA, Fig. 1B and Fig. lC, a rear view, a side view and
a front view of an LED illumination device 1 of an embodiment of the
present invention are respectively shown. Fig. 1A is the rear view
20 of the LED illumination device 1 of the present embodiment when
viewed from above (a rear face 2A side), Fig. 1B is a right-side
view thereof, and Fig. 1C shows an outside view of the LED
illumination device 1 when viewed from a main light emitting surface
side. The LED illumination device 1 shown in Fig. 1A to Fig. 1C is
25 provided with an illumination device main body 2 which is extended
in a longitudinal direction (a left-right direction in Fig. I), and
an LED power source unit 3 disposed on a rear face thereof. Although
2A, 23C, 23h, 5, 6, and 6a respectively correspond to a heat sink, a
hanging part, a second aperture window, a first transparent plate,
5 an ornamental cover, and an aperture, structures and functions
thereof will be described later.
[00201
The LED illumination device 1 of the present embodiment can be
installed on various equipment and facilities such as transportation
10 equipment such as rail vehicles, buildings and so forth. For example,
in case of the rail vehicle, the LED power source unit 3 is
connected to a terminal block for power source supply on a car body
side of the rail vehicle via a power source line 31. In this case,
it is also possible to use either an AC power source or a DC power
15 source as the power source.
[0021]
Fig. ID is a schematic diagram of a one-car rail vehicle
provided with a plurality (here, 5 sets) of LED illumination devices
1 as an example of an application object of the LED illumination
20 device of the present invention. In addition, Fig. 1E is an almost
longitudinal sectional diagram of the rail vehicle in Fig. ID. A
rail vehicle 80 has a current collector device 82 that collects the
electric power through an overhead line 81 on its roof, and high
voltage electric power collected by this current collector device 82
25 is sent to a second power source device 83 installed under the floor
--
of the rail vehicle 80. A storage cell or a rectifier device 84 and
a first power source device 85 are also mounted under the floor of
the rail vehicle 80. The second power source device 83 converts the
high-voltage electric power to low-voltage electric power which can
5 be supplied to service equipment such as illumination, air
conditioner and so forth and supplies the electric power to the
first power source device 85 via the rectifier device 84. On the
other hand, the first power source device 85 supplies the electric
power to service equipment such as the LED illumination device 1 and
10 so forth mounted on the ceiling and so forth of the compartment of
the rail vehicle 80 via the power source line 31. Although there are
many cases when the storage cell is disposed on the power source
line 31 connecting the first power source device 85 with the abovementioned
service equipment, it may be disposed on a wire connection
15 between the first power source device 85 and the second power source
device 83. Incidentally, in the following, the second power source
device, the storage cell, the rectifier device and the first power
source device with a controlling function will be referred to as a
main power source device in all.
i As shown in Fig. lE, two rows, that is, one pair of the LED
illumination devices 1 (1A and 1B) are installed into attaching part
88 in the ceiling within a compartment 90 of the rail vehicle 80
with an air conditioner 89 interposed between them. Incidentally, 91
25 denotes a window and a 92 denotes a seat. The one pair of LED
.
illumination devices 1 (1A and 1B) illuminates the seats 92 in the
compartment 90 and functions as an indirect illumination device that
softly illuminates the vicinity of ceiling parts above the right and
left windows 91 of the compartment.
5 [0023]
The LED illumination devices 1 are sequentially linked in
plurality in a longitudinal direction so as to form rows, and are
installed into the attaching parts 88 in the ceiling within the
compartment 90 with their openings facing downward in an attaching
10 mode which will be described in detail later.
[0024]
The plurality of LED illumination devices 1 are connected, for
example, in series or in parallel with the main power source device.
An illuminance sensor 86 which monitors the illuminance in the
15 compartment of the rail vehicle 80, and a car train formation
control device 87 are connected to the main power source device as
equipment configuring an LED illumination system in addition to the
LED illumination devices 1. The car train formation control device
87 processes route information such as tunnel positions and so forth
20 and a dim command and so forth for controlling the luminance of the
LED illumination device 1 installed in the rail vehicle 80. A change
in illuminance in the compartment incidental to changes in vehicle
outside environment of the rail vehicle 80, for example, changes in
traveling time zone, traveling position, weather and so forth is
25 sensed by the illuminance sensor 86 and is sent to the first power
I -
source device 85 as illuminance information. The first power source
device 85 controls the current or the electric power to be supplied
1 to the LED illumination device 1 via the power source line 31 such
I that the illuminance within the compartment falls within a
5 predetermined range on the basis of the route information and the
illuminance information. The illuminance within the compartment of
I
I the rail vehicle 80 is maintained at a desired level by such an LED
illumination system.
I I 10 Incidentally, a form that the LED power source unit 3 and the
I illumination device main body 2 are separated from each other is
also possible as will be described layer in an embodiment 3.
[0026]
II-II line sectional diagrams in Fig. 1B of the LED
1 15 illumination device 1 of the present embodiment are shown in.Fig. 2
I (Fig. 2A and Fig. 2B). The illumination device main body 2 of the
LED illumination device 1 of the present embodiment is configured by
~ roughly including an almost rectangular parallelepiped frame 20 one
, face of which formed an open face, and the ornamental cover 6 which
20 is put on the frame 20 from the above-mentioned open face side.
Although the II-II line sectional diagram in a state that the
I
i ornamental cover 6 is separated from the frame 20 is shown in Fig.
2A in consideration of easy understanding, the ornamental cover 6
and the frame 20 are used by being integrally combined in reality as
1 25 shown in Fig. 2B.
The frame 20 is configured by including a base part 21, and
side edge parts 22 and 23 provided on right end left both end parts
of the base part 21. The longitudinal section of the frame 20 is UI
I 5 shaped and it is extended in the longitudinal direction (in the
I paper plane right-left direction in the rear view, the side view,
and the front view shown in Fig. 1A to Fig. 1C) of the illumination
device main body 2. The frame 20 of such a shape can be molded, for
example, by extruding an aluminum alloy.
10 [0028]
An end plate 25 is attached to an end part of the frame 20 in
the longitudinal direction of the LED illumination device 1, as
shown in Fig. 3, and forms a wall face of the box-shaped
longitudinal end part of the above-mentioned frame 20.
15 [0029]
A side facing the above-mentioned open face of the base part
21 forms a bottom face of the frame 20 and a substrate 4 with a
plurality of LED light emitting elements 10 mounted is attached to
the bottom face, that is, an attaching surface. As one example, the
20 substrate 4 is formed by a rectangular flat plate and the attaching
face is also in the form of a flat face. A heat sink 2A (a protruded
part) is formed on a power source unit facing face (a rear face of
the attaching surface of the substrate 4) of the base part 21 via
one pair of recessed parts formed in the longitudinal direction of
25 the frame. This heat sink 2A has a function of releasing heat
generated by electric conduction to the LED light emitting element
10 to the outside. Although in the present embodiment, the mere
protruded part is used as the heat sink 2A because thermal
conductivity of aluminum itself is good, a metal thin film which is
5 good in thermal conductivity and a heat radiating coating may be
provided on the rear face of the base part 21 so as to be functioned
as the heat sink 2A with no provision of the protruded part.
Alternatively, the metal thin film and the heat radiating coating
may be provided on a front face of the protruded part.
The side edge part 22 has an upper projection part 22A which
projects leftward (leftward in Fig. 2) from a left side part of the
base part 21, and a lower projection part 22B which is disposed
under it (under in the same drawing) leaving a space and similarly
15 projects leftward. The upper projection part 22A and the lower
projection part 22B are coupled by a hanging part 22C in a vertical
direction (that is, in a thickness direction of the illumination
device main body 2). The lower projection part 22B is provided with
an inner projection part 22D which projected toward the side edge
20 part 23.
[0031]
Likewise, the side edge part 23 has an upper projection part
23A which projects rightward (rightward in Fig. 2) from a right side
part of the base part 21, a lower projection part 23B which is
25 disposed under it leaving a space and also projects rightward, the
upper projection part 23A and the lower projection part 23B are
coupled by a hanging part 23C in the vertical direction. In addition,
also the lower projection part 23B is provided with an inner
projection part 23D which projected toward the side edge part 22.
5 [0032]
The above-mentioned inner projection parts 22D and 23D extend
in the longitudinal direction of the frame 20, and an opening formed
by the inner projection parts 22D and 23D is referred to as an open
face in the present embodiment. In addition, recessed parts 22b and
10 23b by lower surfaces of the above-mentioned inner projection parts
22D and 23D and inner wall faces of the lower projection parts 22B
and 23B are respectively formed on the outside (lower side on the
paper plane in Fig. 2A) of this open face.
[0033]
15 The above-mentioned hanging parts 22C and 23C respectively
form side wall faces of the frame 20. The second aperture windows
23h are intermittently formed through the side wall faces (22C and
23C) along the longitudinal direction of the illumination device
main body as shown in Fig. 1B. The second aperture windows 23h are
20 slots extending in the longitudinal direction of the illumination
device main body 2 and are provided in plurality in the abovementioned
longitudinal direction at predetermined intervals. Though
described later, a second transparent plate 7 is fixed to the second
aperture window 23h with a screw which is a fastener member. The
25 second transparent plate 7 is fixed to each second aperture window
23h. In the present embodiment, favorably, a frame-retarded or fireresistant
resin plate (for example, a polycarbonate plate) is used
as the second transparent plate 7. Incidentally, although the
second transparent plate is not always necessary in principle, it
5 has an effect of protecting the inside of the frame 20 against dust
because it exhibits a function of closing the second aperture window
23h and can suppress illuminance degradation due to adhesion of duct
to the surface of the LED light emitting element 10.
10 The lower projection parts 22B and 23B of the above-mentioned
respective side edge parts 22 and 23 mutually face leaving a space
in the width direction (right-left direction on the paper plane in
Fig. 2) of the LED illumination device 1, and a first aperture
window 20h facing the base part 21 of the frame 20 is formed by the
15 space. The first aperture window 20h is formed such that the first
transparent plate 5 is situated when the ornamental cover 6 has been
attached to the frame 20 (see Fig. 2B) .
[0035]
Next, the ornamental cover 6 will be described. The
20 ornamental cover 6 is a member for covering the frame 20 from below,
and is a plate-shaped member, in outer appearance, which is provided
with an opening 6a and end of which is subjected bending
process. The opening 6a extends in the longitudinal direction (a
vertical direction on the paper in Fig. 2A or Fig. 2B).
25 [0036]
As shown in Fig 3 which is a detailed diagram of a the V part
in Fig. lB, a folded part 63 which is folded upward while being bent
toward the side of the rear face 2A of the illumination device main
body 2 is formed on a longitudinal end part of the ornamental cover
5 6. The folded part 63 covers the end of the illumination device main
body 2 from an end face direction. In addition, later described
extended parts 61 and 62 are formed on width-wise end parts of the
ornamental cover 6.
[0037]
10 In case of the present embodiment, as shown in Fig. 2A, the
ornamental cover 6 is provided with a threaded screw hole 29 and is
detachably fixed to the frame 20 with a fastener member 28 (for
example, a screw, a bolt and nut and so forth) via a cushioning
member,such as packing 24 on the lower surface of each of the lower
15 projection parts 22B and 23B and the inner projection parts 22D and
23D of the frame 20.
[0038]
Since the LED illumination device 1 of the present invention
is simple in structure and hence is very thin in thickness, and
20 further since the open face and the first aperture window 20h and
the substrate 4 are in a parallel or almost parallel positional
relation (that is, since the substrate 4 is fixed to the bottom face
of the box-shaped frame 20), prompt access to the substrate 4 is
possible by removing the ornamental cover 6. Therefore,
25 accessibility to the substrate 4 is remarkably improved and
maintainability of the device such as replacement or the like of the
substrate 4 when the LED light emitting element 10 has been
damaged/failed is improved, by configuring the ornamental cover 6 to
be detachable without thoroughly fixing the ornamental cover 6 to
5 the frame 20. Although it goes without saying that lateral light
distribution of the illumination device is possible even when the
ornamental cover 6 is thoroughly fixed to the frame 20, it is more
preferable that the ornamental cover 6 be detachable relative to the
frame 20 from the viewpoint of maintainability.
10 [0039]
The first transparent plate 5 is disposed on the rear face
(on the face side opposite to the frame 20) of the opening 6a. In
the present embodiment, in a plate shaped member configuring the
ornamental cover 6, a part around the opening 6a is referred to as
, 15 an open edge part 60, the first transparent plate 5 is fixed to the
rear face side of the opening edge part 60 by the packing 24.
Although a configuration that the first transparent plate 5 is fixed
to the frame 20 side can be implemented, considering the
maintainability of the device, it is more preferable that the first
20 transparent plate 5 be fixed to the ornamental cover 6 side such
that it can be detached from the frame 20 integrally with the
ornamental cover 6.
1 In addition, in a case where the ornamental cover 6 has been
I 25 attached to the frame 20, the packing 24 is contained in the
*
recessed parts 22b and 23b as shown in Fig. 2B. That is, an outer
peripheral edge of the first transparent plate 5 is nip-held by the
inner projection parts 22D and 23D and the open edge part 60 via the
packing 24, and the open edge part 60 functions as a holding part
5 for holding the outer peripheral edge part of the first transparent
1 plate 5. The first transparent plate 5 is extended in the
I i longitudinal direction (vertical direction on the paper plane in Fig.
I
I 2) similarly to the opening 6a.
[0041]
10 The first transparent plate 5 is a member having a function
of guiding the light radiated from the LED light emitting element 10
toward the lower side of the illumination device main body 2 and
laterally reflecting or scattering it, and preferably a tabular
glass plate (for example, a tempered glass plate) is used. The first
15 transparent plate 5 configures a flat light emitting surface by
fixing the ornamental cover 6 to the box-shaped frame so as to close
the open face. In case of the rail vehicle, there exist passengers
who take long baggage such as ski plates, musical instruments and so
forth aboard the train. Therefore, it becomes more rarely for the
20 long baggage to be caught in the illumination device whose light
emitting surface is flat than in an illumination device having
ruggedness on its light emitting surface such as the florescent
light. In addition, since the height from the floor up to the
ceiling is increased by the amount of absence of ruggedness, it
25 becomes rare for the above-mentioned baggage to touch the ceiling.
23
Thus, it becomes possible to reduce the failure probability of the
illumination device by configuring the light emitting surface to be
flat in comparison with a case that the light emitting surface is
rugged.
[0042]
A diffusion sheet (not shown) which makes some of the light
emitted from the LED light emitting element 10 pass and makes some
thereof reflect or scatter is disposed on an inner face (an upper
side face in Fig. 2) of the first transparent plate 5, and it
becomes possible to irradiate the lateral side by diffusing the
emitted light from the LED light emitting element 10 by this
diffusion sheet. In addition, flying-apart of the transparent plate
5 can be prevented when the first transparent plate 5 has been
damaged owing to the provision of the diffusion sheet.
LO0431
A polarizable sheet may be adopted as the diffusion sheet.
In this case, when the emitted light from the LED light emitting
element 19 has been incident upon the first transparent plate 5 and
diffused, the appearance of the light emitting surface of the first
transparent plate 5 is changed by mounting the diffusion sheet onto
the first transparent plate 5 by changing the vertical/horizontal
directions thereof. For example, the first transparent plate 5 emits
light linearly in the longitudinal direction and the light emitting
surface looks like a cold-cathode tube, or the first transparent
plate 5 emits light in a striped pattern in a width direction
,.
orthogonal to the longitudinal direction and the light emitting
surface looks three-dimensional.
Incidentally, although in the present embodiment, the
5 diffusion sheet has been used in order to implement the
reflecting/scattering functions of the first transparent plate 5,
the first transparent plate 5 can be produced without'using the
diffusion sheet by using a member made of glass fiber or
polycarbonate. However, combination of the glass plate with the
10 diffusion sheet is less in light loss and allows implementation of
the illumination device which is higher in illuminance.
[0045]
In addition, the first transparent plate 5 and the second
transparent plate 7 may be configured by colored transparent members.
15 In this case, although light which is irradiated to the outside
passing through the first transparent plate 5 and the second
transparent plate 7 will be colored, an effect similar to cocktail
illumination can be created by arranging side by side the plurality
of LED illumination devices each having the colored first
20 transparent plate or second transparent plate and by changing the
colors of the transparent plates among the plurality of LED
illumination devices. It goes without saying that this effect is
exhibited even in a case where it is applied to the one other than
the rail vehicle.
25 [0046]
2 5
The ornamental cover 6 of the present embodiment is provided
with the extended parts 61 and 62 which are respectively extended
from the open edge part 60 toward the both sides as shown in Fig. 2.
In case of the LED illumination device 1 of the present embodiment,
I 5 since it is a single-side light emitting type lighting fixture that
I
only one of the both side faces emits light, the shapes of the
extended parts 61 and 62 are different from each other, that is, the
shapes of the extended parts 61 and 62 are bilaterally asymmetric.
I i The extended part 61 forms a vertical wall part which rises upward
1 10 while bending toward the side of the rear face 2A of the
illumination device main body 2 and is extended up to the upper
projection part 22A of the side edge part 22 of the frame 20, and
covers the side edge part 22 of the frame 20 from the lateral side.
This is because light emission from the side that the extended part
15 61 is provided is not needed. The extended part 62 forms an inclined
part which is inclined while curving upward toward the side of the
rear face 2A of the illumination device main body 2. Incidentally,
the function and action of the extended part 62 will be described
later.
Fig. 4 is a schematic diagram showing the state that the LED
light emitting element 10 has been mounted onto the substrate 4.
Many LED light emitting elements 10 which are arranged along the
longitudinal direction (the right-left direction in the drawing) of
25 the substrate 4 are loaded on a mounting surface of the substrate 4.
. This substrate 4 is fixed onto the base part 21 via an insulating
sheet (not shown) .
In the LED illumination device 1 of the present embodiment,
5 plural substrates are placed on one frame 20. For example, in the
present embodiment, the substrate 4 to be attached to the
illumination device main body 2 which is one of the constitutional
elements of one LED illumination device 1 is configured by a
plurality of sheets, for example, four substrates 4A, 4B, 4C, and 4D
10 (although many LED light emitting elements 10 are loaded on the
I
I mounting surface of each of the substrates 4A to 4D, illustration
I
I thereof is omitted). Since in the LED illumination device 1 of the
present embodiment, the substrate 4 on which the LED light emitting
elements are to be mounted is mounted on the illumination device
15 main body 2 by being divided into the plurality of substrates as
mentioned above, the maintenance of the device is facilitated in a
case where the LED light emitting element has been damaged/failed.
That is, although in a case where all the LED light emitting
elements have been mounted on one substrate, necessary to wholly
20 replace the substrate is generated even in case of a partial failure,
since in the LED illumination device 1 of the present embodiment,
the LED light emitting elements are mounted on the device by being
individually divided to the plurality of substrates, there is no
need to replace all of the LED light emitting elements.
25 [0049]
A schematic diagram of an electrical connection relation
among the plurality of substrates using one pair of connectors (a
male connector and a female connector) is shown in Fig. 5. A male
connector 40 is disposed on a corner part of each of the substrates
5 4A to 4D, and the adjacent substrates are electrically connected by
I a female connector 41 for relay which is fitted on each mating male
connector 40. In addition, female connectors 41' for short-circuit
are fitted on the remaining male connectors 40 of the substrates 4A
and 4D. A female connector 41" to be fitted on the remaining male
10 connector 40 of the substrate 4B is connected to the LED power
source unit 3 via a terminal block 30. In the example in Fig. 5, the
substrates 4A and 4B and the substrates 4C and 4D are respectively
serially connected to the power source unit 3. One substrate 4 which
is configured by connecting together the plurality of substrates by
15 using one pair of connectors as mentioned above is mounted on the
illumination device main body 2 of each LED illumination device 1.
[0050]
Next, the operation of the LED illumination device 1 of the
present embodiment will be described using Fig. 6 and Fig. 7. Fig. 6
20 shows a VI-VI line sectional diagram of Fig. lB, and Fig. 7 is a
schematic diagram showing an optical path of light emitted from the
LED light emitting element 10.
[0051]
The light emitted from the LED light emitting element is
25 incident upon the first transparent plate 5 facing the base part 21.
28
Since the first aperture window 20h (in other words, the first
transparent plate 5) and the substrate 4 are in the parallel or
almost parallel positional relation, light other than the light
which directly reaches the second aperture window 23h in the light
5 emitted from each LED light emitting element 10 is incident upon the
first transparent plate 5 which is directly under it, passes
downward through it and then is irradiated to the outside of the
illumination device main body as direct light. One example of the
optical path of the direct light is shown by solid lines in Fig. 6
10 and Fig. 7. In addition, some of the emitted light from the LED
light emitting element 10 is reflected (totally reflected or
partially reflected) by the first transparent plate 5 and thereafter
is irradiated to the lateral side of the second aperture window 23h
as indirect light passing through the second transparent plate 7 of
15 the hanging part 23C. The optical path of the indirect light is
shown by one-dot chain lines in Fig. 6 and Fig. 7. At that time, in
a case where the diffusion sheet is mounted on the inner surface of
the first transparent plate 5, not only the light can be emitted by
using the entire surface of the first transparent plate 5 as the
20 main light emitting surface, but also diffused light by the
diffusion sheet is laterally irradiated passing through the second
transparent plate 7.
[0052]
29
Lateral irradiation of the illumination device can be
implemented by the simple configuration by utilizing reflection and
(or) scattering by the first transparent plate 5 as mentioned above.
I 5 I Next, the functions of the extended part 62 of the ornamental
~ cover 6 and the upper projection part 23A of the frame 20 will be
I
I described. Fig. 8 is a schematic diagram showing the optical path of
the light emitted from the LED light emitting element 10, in which a
I I solid line indicates the optical path of direct light, a one-dot
I
I
10 chain line indicates the optical path of indirect light, and a twodot
chain line indicates the optical path of another indirect light.
A dotted line indicates the center of the second transparent plate 7.
Some of the emitted light from the LED light emitting element 10
passes through the first transparent plate 5 and irradiates the
15 lower surface of the illumination device along the optical path
indicated by the solid line in Fig. 8.
[0054]
In case of the present embodiment, the outside of the
ornamental cover 6 forms the extended part 62 configured by an
20 upward warping curved surface part. As indicated by the one-dot
chain line in Fig. 8, some of the emitted light from the LED light
emitting element 10 directly passes through the second transparent
plate 7, is then reflected by the inner surface of the extended part
62 and irradiates a lateral upper part (the paper plane upper side
25 above the dotted line in Fig. 8). On the other hand, as indicated by
.. the two-dot chain line in Fig. 8, some of the emitted light from the
LED light emitting element 10 is reflected by the diffusion sheet on
I the rear surface of the first transparent plate 5, is then reflected
1 by the inner surface of the upper projection part 23A, and
1 5 irradiates a lateral lower part (lower side on the paper plane under
I
I the dotted line in Fig. 8)
It becomes possible to evenly irradiate the lateral part of
the illumination device from the upper side to the lower side by
10 providing the upward curved extended part 62 in a width-wise end
region of the ornamental cover 6 and providing the upper projection
part 23A on the frame 20 as described above.
I [0056]
This advantageous effect is great in particular in a case
15 where the LED illumination device 1 of the present embodiment is
attached to the rail vehicle, and it becomes possible to irradiate
the ceiling side faces, side advertisements and so forth of the
vehicle more brightly than by the conventional illumination device.
[0057]
20 For example, in the one pair of LED illumination devices 1
shown in Fig. lE, the left-side LED illumination device 1A has the
extended part 62 on its left side, and the right-side LED
illumination device 1B has the extended part 62 on its right side.
Thereby, there is an advantageous effect that light from the
extended parts 62 brightly irradiates the ceiling side faces, the
side advertisements and so forth of the vehicle with light.
1 At that time, it is preferable that the inner surface of the
~ 5 extended part 62 be painted white in order to increase the reflected
I light amount. In this case, since irradiation is made from the
lateral side of the illumination device main body 2 by utilizing
reflection by the extended part 62 of the ornamental cover 6, the
structure of the entire device can be simplified.
10 [0059]
In addition, although in the above-mentioned description, the
example that the emitted light from the LED light emitting element
10 is irradiated only laterally from the side part of the
illumination device main body 2 has been shown, as shown in Fig. 9,
15 a third aperture window 25a may be formed through the end plate 25
which is mounted on the longitudinal end part of the illumination
device main body 2 and a third transparent plate 8 may be mounted on
the aperture window 25a so as to irradiate the emitted light from
the LED light emitting element 10 in an end part direction through
20 the third aperture window 25a by passing it through the third
transparent plate 8.
[0060]
According to the present embodiment, there can be implemented
the LED illumination device that the structure of the entire device
25 is simplified, it emits light as the main light emitting surface
~ A without any additional complicated mechanism, and light distribution
to the lateral side of the illumination device main body is possible.
In addition, since the structure of the entire device is
simplified, it becomes also possible to implement the extremely thin
5 LED illumination device.
EMBODIMENT 2
[0061]
In the present embodiment, a modified example of the extended
part 62 of the ornamental cover 6 will be described. Although in the
10 embodiment 1, the curve-shaped extended part 62 has been described
as shown in Fig. 2 or Fig. 6, it may be the one which is linearly
orthogonal to the open edge part 60 of the ornamental cover 6 while
bending as shown in Fig. 10. Also in this case, the optical path
which is the same as that in Fig. 8 is formed.
Alternatively, the extended part 62 of the ornamental cover 6
may be the one which is extended simply onto an extension line of
the open edge part 60 without having the curved shape and the bent
shape as shown by a modified example in Fig. 11. Also in this case,
it is possible to laterally irradiate the emitted light from the LED
20 light emitting element 10.
According to the present embodiment, the structure of the
extended part for performing laterally-directed light distribution
and therefore the structure of the entire device are simplified, and
it becomes possible to implement the extremely thin LED illumination
25 device.
EMBODIMENT 3
Although in the embodiments 1 and 2, the configuration of the
one-side light emitting type LED illumination device that in the two
5 side faces of the LED illumination device, only one-side emits light
has been described, in the present embodiment, an LED illumination
device of a both-side light emitting type that the both side faces
of the LED illumination device emit light, and of a form that the
LED power source unit is separated from the illumination device main
10 body will be described.
A sectional diagram of the LED illumination device 1 of the
present embodiment which corresponds to the VI-VI line sectional
diagram in Fig. 1B is shown in Fig. 12. Here, although the outside
view of the LED illumination device of the present embodiment is
15 almost the same as Fig. 1B in side view, the rear view and the front
view thereof are slightly different from the modes shown in Fig. 1A
and Fig. 1C because the LED power source unit is separated and
further it is of the both-side light emitting type.
[0063]
In the present embodiment, the second aperture windows 23h
are formed through the both hanging parts 22C and 23C of the side
edge parts 22 and 23 of the frame 20 and the second transparent
plates 7 are mounted onto the aperture windows. In addition, both of
the extended parts 61 and 62 of the ornamental cover 6 are formed as
25 inclined parts which are inclined while curving toward the rear face
2A side of the illumination device main body 2. Further, the upper
projection parts 22A and 23A are respectively disposed on both of
the side edge parts 22 and 23. Thereby, it becomes possible to
evenly irradiate the both lateral sides of the illumination device
5 from the upper sides to the lower sides.
Since the shapes of the extended parts 61 and 62 of the LED
illumination device 1 of the present embodiment are bilaterally
symmetric, it is suited to the type that, for example, the air
10 conditioner for the compartment 90 of the rail vehicle is installed
under the floor of the rail vehicle 80 to condition the air in the
compartment 90 via a duct. That is, the LED illumination device 1 of
the present embodiment can be also attached to the center of the
ceiling within the compartment 90. In other words, the LED
15 illumination device 1 of the present embodiment has no restriction
on the installation position such as the ceiling plane and so forth.
[0065]
In addition, since the LED power source unit 3 is separated
from the illumination device main body 2 in the present embodiment,
20 the illumination device main body 2 can be light-weighted and a load
of work of attaching the illumination device main body 2 to the
ceiling plane can be reduced. In addition, since the LED power
source unit 3 can be installed on an outer part separated from the
illumination device main body, for example, under the floor of the
25 rail vehicle, such an advantageous effect that the center of gravity
I - - of the vehicle can be lowered can be also expected. Incidentally, it
goes without saying that also the one-side light emitting type LED
I illumination device described in the embodiment 1 can adopt the
I configuration that the power source unit is separated.
I
I
I 5 EMBODIMENT 4
[0066]
In the present embodiment, an embodiment of a lighting
fixture with shade which is equipped with a shade (a diffuser) will
be described. Although the LED illumination devices described in the
10 embodiments 1 to 3 have such characteristics that they can
illuminate the lateral parts more brightly than the conventional LED
illumination device, there are cases when lateral illumination is
not so important and it is required to distribute the light emitted
from the LED light emitting element to the lower side of the
15 illumination device depending on the situation.
[0067]
Fig. 13A shows a sectional diagram of the LED illumination
device 1 of the present embodiment. The LED light emitting element
10 is mounted on the substrate 4 and the substrate 4 is screw-
20 clamped to the bottom face of the frame 20. The transparent plate 5
is fixed to the rear face of the opening 6a in the ornamental cover
6, and further the ornamental cover 6 is fixed to the frame 20 via
the packing 24 (the cushioning member) and with a not shown fastener
member. Although the second aperture window 23h is formed in the
25 side wall of the frame 20, the second transparent plate 7 is fixed
to both of the outside of the side wall face of the frame 20 and the
inside of the side wall face of the ornamental cover 6 in the
present embodiment. A diffuser 70 (a shade member) is fixed to the
frame 20 and the LED power source unit 3 via an attaching part 71.
5 [0068]
In the emitted light from the LED light emitting element 10,
light irradiated from the main light emitting surface passes through
the first transparent plate 5 and irradiates the lower face of the
illumination device, for example, along the optical path indicated
10 by a solid line in Fig. 13A. On the other hand, in case of indirect
light indicated by a one-dot chain line in Fig. 13A, although it
passes through the second transparent plate 7, it is reflected by an
inner wall face (a downward facing face on the paper plane) of the
diffuser 70 and is guided to the a lower part of the LED
15 illumination device 10. Likewise, even direct light whose optical
path runs through the second aperture window 23h is reflected by the
inner wall face (the downward facing face on the paper plane) of the
diffuser 70 and is guided to the lower part of the LED illumination
device 1.
20 [0069]
Therefore, in case of the embodiment shown in Fig. 13A, since
the light emitted from the LED light emitting element 10 thoroughly
contributes to illumination of a lower side of the illumination
device, it becomes possible to illuminate brightly in particular the
25 lower part of the illumination device in comparison with the LED
illumination devices described in the embodiments 1 to 3. Since the
LED illumination device of the present embodiment is bilaterally
symmetric in shape of the extended parts, for example, when it is to
be attached to the attaching part on the ceiling within the
5 compartment 90 of the rail vehicle 80, it can be attached to the
center of the ceiling and there is no restriction on its
installation position.
Fig. 13B shows a modified example of the embodiment 4. In
10 case of the example shown in Fig. 13B, since the lower end of the
second aperture window 23h is situated lower than the lower end of
the diffuser 70, some of the light passing through the second
aperture window 23h is not reflected by the diffuser 70 and is
irradiated to the lateral side of the LED illumination device 1
15 through the second aperture window 23h as direct light. Therefore,
the LED illumination device which is favorable in a case where
although it is desired to illuminate mainly the lower side of the
LED illumination device, it is also desired to distribute the light
also to the lateral side to some extent can be implemented by the
20 embodiment in Fig. 13B. Incidentally, it is apparent that the degree
of laterally-directed light distribution can be regulated by
adjusting a length d (a difference between a lower end position of
the second aperture window 23h and a lower end position of the
diffuser 70) shown in Fig. 13B.
25 EMBODIMENT 5
In the present embodiment, respective modes of a method of
attaching the LED illumination device with power source unit will be
described using Fig. 14 to Fig. 17. Here, an attaching method in
I 5 case of attaching the LED illumination device of the present
invention to the rail vehicle will be described. The LED
illumination device 1 described in the embodiments 1 to 4 is
I
attached to the attaching surface using the respective projection
~ parts 22A and 23A or 22B and 23B of the respective side edge parts
I 10 22 and 23 of the frame 20. In Fig. 14 to Fig. 17, the numerals which
are the same as the reference numerals shown in Fig. 1 to Fig. 13
mean the same or corresponding parts. In addition, in Fig. 14 to Fig.
17, the LED illumination device 1 is shown by the schematic diagram
and illustration of the substrate, the LED light emitting element,
15 the first and second transparent plates, the ornamental cover and so
forth of the illumination device main body 2 is omitted.
An attaching mode shown in Fig. 14 is an example that a
through-hole 16a id formed in a top plate 16 of the ceiling of the
20 rail vehicle and the LED power source unit 3 has been installed on
the rear side of the ceiling through the through-hole 16a. At that
time, the respective upper projection parts 22A and 23A of the
respective side edge parts 22 and 23 of the frame 20 are attached to
the top plate 16 with set screws 15 (the fastener members) which are
25 vertically inserted through them.
An attaching mode shown in Fig. 15 is an example that a
recessed part 16b formed in the ceiling is utilized and the LED
power source unit 3 is installed within the recessed part 16b. In
5 this case, a lower end of a metal fitting 17 which is almost inverse
U-shaped in cross section is attached to each of the upper
projection parts 22A and 23A of the frame 20 with the set screw 15.
The metal fitting 17 is disposed within the recessed part 16b and is
attached to a top plate 16A in the recessed part 16b by a set screw
10 18.
[0074]
Although in the attaching modes shown in Fig. 14 and Fig. 15,
the examples that the illumination device main body 2 has been
disposed under the top plate 16 have been shown, in the one shown in
15 Fig. 16, the respective upper projection parts 22A and 23A of the
frame 20 are disposed on the rear side of the ceiling and the lower
face of each of the upper projection parts 22A and 23A is attached
to the upper face of the top plate 16 with the set screw 15. That is,
in this case, part of the illumination device main body 2 is
20 disposed above the top plate 16.
[0075]
An attaching mode shown in Fig. 17 is an example that the
entire of the LED illumination device is disposed on the rear side
of the ceiling, and the LED illumination device 1 is embedded in the
25 ceiling. At that time, the lower face of each of the lower
projection parts 22B and 23B of each of the side edge parts 22 and
23 of the frame 20 is attached to the upper face of the top plate 16
with the set screw 15 (the fastener member). In this case, since
! there is no need to irradiate light from the lateral side of the LED
5 illumination device 1, the second transparent plate becomes
unnecessary. In case of the attaching mode shown in Fig. 17, since
the ceiling plane is not rugged, there is such an advantageous
effect that the ceiling plane looks tidy.
10 It becomes possible to readily perform the work of attaching
the LED illumination device 1 to the attaching surface and the
various attaching methods become possible, by utilizing the
projection parts 22A and 23A and 23A and 23B which are vertically
spaced apart on the left and right both side edge parts 22 and 23 of
15 the frame when attaching the LED illumination device 1 as described
above.
[0077]
In addition, in the attaching mode described in the present
embodiment, the illumination device main body is made to be attached
20 to the attaching surface via the projection parts of the side edge
parts. In this case, since the projection part is provided to be
laterally projected from the side part of the base part, it becomes
possible to readily perform the work of attaching the illumination
device main body to the attaching surface by utilizing this
25 projection part. In addition, since the respective projection parts
are disposed leaving a space in the thickness direction of the
illumination device main body with the hanging parts interposed,
attaching to the attaching surface can be performed at two positions
1 in the thickness direction of the illumination device main body.
Incidentally, when the illumination device main body is to be
installed onto the attaching surface (for example, the ceiling
plane), such advantageous effects are exhibited that the work of
connecting the power source unit 3 to, for example, the terminal
10 block on the attaching surface side is facilitated and the
maintenance work of the power source unit alone is facilitated, by
installing the LED power source unit 3 on the rear face 2A of the
illumination device main body 2.
[0079]
Although the attaching method when attaching the LED
illumination device of the present invention to the rail vehicle has
been described hereinabove in the embodiment 5, the LED illumination
device of the present invention is also applicable to indoor
illumination of a building and so forth, indoor illumination of a
20 home and so forth.
The present invention is favorable for the LED illumination
device which can implement laterally-directed irradiation light by
the simple mechanism.
25 EXPLANATION OF REFERENCE NUMERALS
[0080]
1: LED illumination device
2: illumination device main body
2A: heat sink
20h: first aperture window
21: base part
22: side edge part
22A, 22B: projection part
22C: hanging part
23: side edge part
23A, 23B: projection part
23C: hanging part
23h: second aperture window
25a: third aperture window
3: LED power source unit
31: power source line
4: substrate
4A to 4D: substrate
5: first transparent plate
6: ornamental cover
60: open edge part
61, 62 : extended part
7: second transparent plate
10: LED light emitting element
80: rail vehicle
88: ceiling attaching part
90 : compartment

WE CLAIM:
1. An LED illumination device, comprising:
a substrate on which a LED light emitting element is mounted;
5 a frame having a bottom face on which the substrate is fixed,
and side wall faces extending from the bottom face, whose face
opposite to the bottom face forms an open face;
an ornamental cover having a first aperture window through
which light emitted from the LED light emitting element passes, and
10 attached to the frame from the side od the open face;
a first transparent plate that is fixed to the ornamental
cover so as to cover the first aperture window, and makes some of
the light emitted from the LED light emitting element is passed and
makes some thereof reflect or disperse; and
15 a second aperture window that is provided in at least one of
the side wall faces and makes the light reflected from the first
transparent plate pass to the outside.
2. The LED illumination device according to claim 1, wherein
20 the first transparent plate configures a flat light emitting
face by fixing the ornamental cover to the frame so as to cover the
open face.
3. The LED illumination device according to claim 1, wherein
25 the first transparent plate is provided with
a glass plate, and a
of light passing through the glass plate.
4. The LED illumination device according to claim 3, wherein a
5 polarizing sheet is provided in place of the diffusion sheet.
5. The LED illumination device according to claim 1, comprising:
a second transparent plate disposed on the second aperture
window.
10
6. The LED illumination device according to claim 5, wherein the
second transparent plate is a colored transparent plate.
7. The LED illumination device according to claim 1, wherein the
15 second aperture window is formed in any one of two side wall faces
extending in a longitudinal direction of the frame in the side wall
faces.
8. The LED illumination device according to claim 7, wherein the
20 second aperture window is further formed in both of the two side
wall faces.
9. The LED illumination device according to claim 7, comprising:
a third aperture window provided in a side wall face on a
25 longitudinal end part of the frame.
46
10. The LED illumination device according to claim 1, wherein the
side end part of the second aperture window of the ornamental cover
is a curved surface.
11. The LED illumination device according to claim 10, wherein a
face on the second aperture window side of the curved surface is
painted in a light reflecting color.
10 12. The LED illumination device according to claim 1, wherein in
the side wall faces of the frame, two side wall faces that extend in
a longitudinal direction of the frame are provided with projection
parts on which fastener members that fix the LED illumination device
to a predetermined attaching face are arranged.
13. The LED illumination device according to claim 1, comprising:
a shade member that warps from the bottom face side of the
frame toward the open face side.
20 14. The LED illumination device according to claim 13, wherein
with the bottom face of the frame on an upper side and the
open face side on a lower side, at least a lower end of the second
aperture window is disposed lower than a lower end of the shade
member.
25
15. The LED illumination device according to claim 1, comprising:
a heat sink formed on a rear face side of an attaching surface
of sais substrate.
5 16. The LED illumination device according to claim 15, wherein the
heat sink is a protruded part formed by two longitudinal grooves
provided in the rear face side.
17. A rail vehicle, comprising:
10 a plurality of LED illumination devices to be installed in a
compartment of the rail vehicle; and
a main power source device that supplies electric power to the
LED illumination devices,
wherein, each of the LED illumination devices comprises
a substrate on which a LED light emitting element is mounted,
a frame having a bottom face on which the substrate is fixed,
and side wall faces extending from the bottom face, whose face
opposite to the bottom face forms an open face,
an ornamental cover having a first aperture window through
20 which light emitted from the LED light emitting element passes, and
attached to the frame from the side of the open face,
a first transparent plate that is fixed to the ornamental
cover so as to cover the first aperture window, and makes some of
the light emitted from the LED light emitting element is passed and
25 makes some thereof reflect or disperse, and
a second aperture window that is provided in at least one of
the side wall faces and makes the light reflected from the first
transparent plate pass to the outside.
5 18. The rail vehicle according to claim 17, wherein
the LED illumination devices are linked in plurality in a
longitudinal direction and installed on a ceiling of the compartment
of the rail vehicle with the first aperture windows facing downward,
and
10 wherein, with respect to each of the LED illumination devices,
a face of the bottom face on the opposite side of the
substrate is fixed to a front side of the ceiling, and the LED power
source unit is fixed to a rear face side of the ceiling, and
the first transparent plate configures a flat light emitting
15 face by fixing the ornamental cover to the box-shaped frame so as to
cover the open face.
19. The rail vehicle according to claim 18, wherein
a second transparent plate that is disposed on the second
20 aperture window is provided,
an upward curved extended part is provided in an width-wise
end part region of the ornamental cover, and
some of emitted light from the LED light emitting element
directly passes through the second transparent plate, is thereafter
'io
1 1 - reflected by an inner face of the extended part and i r r a d i a t e s a
l a t e r a l upper part.
Dated this 2oth day of January 2014
5
Of Anand and Anand Advocates
Agent for the Pgplicant