Information Processing Apparatus, Program, And Control Method

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Information Processing Apparatus, Program, And Control Method

Abstract: An information processing apparatus includes a display, a sensor, and a controller. The display has a screen. The sensor is configured to detect an inclination. The controller is configured to display a first object on the screen and display a second object associated with the first object on the screen in accordance with the inclination detected by the sensor.

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Notices, Deadlines & Correspondence

Patent Information

Application #

Filing Date

30 August 2011

Publication Number

25/2013

Publication Type

INA

Invention Field

MECHANICAL ENGINEERING

Status

remfry-sagar@remfry.com

Parent Application

Applicants

SONY CORPORATION

1-7-1 KONAN, MINATO-KU, TOKYO

Inventors

1. YUSUKE MIYAZAWA

C/O SONY CORPORATION, 1-7-1 KONAN, MINATO-KU, TOKYO

2. SEIJI SUZUKI

C/O SONY CORPORATION, 1-7-1 KONAN, MINATO-KU, TOKYO

3. YASUSHI OKUMURA

C/O SONY CORPORATION, 1-7-1 KONAN, MINATO-KU, TOKYO

Specification

INFORMATION PROCESSING APPARATUS, PROGRAM, AND CONTROL METHOD Background The present disclosure relates to an information processing apparatus including a display and a touch panel, a program, and a control method. From the past, there has been widely. known an information processing apparatus including a display such . as an LCD (Liquid Crystal Display), and a touch panel that detects a contact position on a screen of the display (see, for example, Japanese Patent Application Laid-open No. 2005-09441). When making an input operation on an information processing apparatus including a display and a touch panel, a user touches a screen of the display with a finger, a stylus, or the like or slides a finger, a stylus, or the like thereon, thus making an input operation on the information processing apparatus. Summary It is desirable to provide an information processing apparatus adopting, as an unprecedented new input system, an input system using a combination of an input operation made by inclining the information processing apparatus and an input operation made via a touch panel. According to an embodiment of the present disclosure, there is provided an information processing apparatus including a display, a sensor, and a controller. The display has a screen. The sensor is configured to detect an inclination. The controller is configured to display a first object on the screen and display a second object associated with the first object on the screen in accordance with the inclination detected by the sensor. In the information processing apparatus, when a user inclines the information processing apparatus, the second object is displayed on the screen in accordance with the inclination. The information processing apparatus may further include a touch panel configured to detect contact. In this case, the second object may be an object operable with the touch panel. In the information processing apparatus, the controller may switch availability of an operation of the second object using the touch panel in accordance with the inclination. Accordingly, the user inclines the information processing apparatus to display the second object on the screen, and makes an input operation with a finger or the like via the touch panel to operate the second object. In the information processing apparatus, the first object-may be an object-operable -with-the touch panel. In the information processing apparatus, the controller may switch a first state where the first object is operable with the touch panel and a second state where the second object is operable with the touch panel in accordance with the inclination. In the information processing apparatus, when an input operation is made with use of the touch panel within the same display area on the screen, an object to be operated can be differentiated depending on an angle of the inclination of the information processing apparatus. Accordingly, the limited screen can be effectively utilized. In the information processing apparatus, the controller may display in a rotational manner a three-dimensional display object having a first surface serving as the first object and a second surface serving as the second object in accordance with the inclination, to thereby display the second object on the screen in accordance with the inclination. In the information processing apparatus, when the user inclines the information processing apparatus, the three-dimensional display object is rotated in accordance with the inclined angle. Accordingly, the operation becomes intuitive. In the information processing apparatus, the controller may control display such that the three-dimensional display object is hardly rotated in a case where an angle of the inclination is less than a predetermined value, and such that a rotation speed of the three-dimensional display object becomes higher as the-inclination increases in a case where the angle of the inclination is the predetermined value or more. In the information processing apparatus, in the case where an angle of the inclination of the information processing apparatus is less than a predetermined threshold value, the three-dimensional display object is hardly rotated and accordingly the three-dimensional display object can be prevented from being rotated by an unintentional hand movement or the like. On the other hand, in the case where the angle of the inclination of the information processing apparatus is the predetermined threshold value or more, the rotation speed of the three-dimensional display object becomes higher as the inclination increases. Accordingly, in the case where the user expresses his/her intention to rotate the three-dimensional display object and then rotates the casing, the three-dimensional display object can be appropriately rotated in accordance with the user's intention of rotation. In the information processing apparatus, the controller may determine a position of a virtual camera in accordance with the inclination, and change a background image of' the three-dimensional display object in accordance with the position of the virtual camera. Accordingly, when the user inclines the information processing apparatus, the three-dimensional display object is displayed in a rotational manner, and the background image of the three-dimensional display object is changed in accordance. with the position of the virtual camera. Accordingly, the feeling of rotating the three-dimensional display object can be improved. In the information processing-apparatus, the controller may move the first object and the second object in directions different from each other in accordance with the inclination, to thereby display the second object on the screen in accordance with the inclination. In the information processing apparatus, when the user inclines the information processing apparatus, the first object and the second object are moved in parallel to each other on the screen in accordance with the inclined angle. Also in such a case, an operation becomes instinctive. For example, the user can obtain the feeling as if to open a door (first object). In the information processing apparatus, the controller may move the first object while rotating the first object. Accordingly, the feeling of opening a door is improved. In the information processing apparatus, the first object may be an image displayed when content is reproduced. In this case, the second object may be an object for operating a reproduction position of the content. In this case, the controller may change, in a case where the second object is operated with the touch panel, the reproduction position in accordance with a change amount of a contact position of the touch panel. In the information processing apparatus, the controller may change a ratio of a change amount of the reproduction position of the content to the change amount of the contact position of the touch panel, in accordance with the - inclination. Accordingly, by inclining the information processing apparatus, the user can optionally change the ratio of the change amount of the reproduction position of the content to the change amount of the contact position of the touch panel. In the information processing apparatus, the controller may simultaneously execute a plurality of application programs. In this case, the first object may be an image displayed by one of! the plurality of application programs. In this case, the second object may be an image for selecting one of the plurality of application programs. Accordingly, by inclining the information processing apparatus and making an input via the touch panel, the user can select an optional application. In the information processing apparatus, the first object may be an image indicating content. In this case, the second object may be an icon for deleting content. Accordingly/ in the case where the user does not intend to delete content, the content can be prevented from being deleted mistakenly. In the information processing apparatus, the controller may be capable of updating a reference point serving as a reference of the inclination. In the information processing apparatus, the controller may determine whether an angle of the inclination is a predetermined threshold value or more, and update the reference point when the angle of the inclination is the predetermined threshold value or more. Accordingly, in the case where an operation position of the information processing apparatus is changed, the change of the operation position can be appropriately supported. In the information processing apparatus, the controller may determine whether the contact with the touch panel is not detected for a predetermined period of time or more and update, in the case where the contact is not detected for the predetermined period of time or more, a position of the information processing apparatus at that time as the reference point. Accordingly, in the case where the operation position of the information processing apparatus is changed, the change of the operation position can be appropriately supported. In the information processing apparatus, the controller may determine whether a change amount of the inclination is less than a predetermined threshold value within a predetermined period of time and update, in the case where an angle of the inclination is less than the predetermined threshold value, a position of the information processing apparatus at that time as the reference point. Accordingly, in the case where the operation position of the information processing apparatus is changed, the change of the operation position can be appropriately supported. According to an embodiment of the present disclosure, there is provided a program causing an information processing apparatus to execute displaying a first object on a screen of a display. Further, a second-object associated with the first object is displayed; on the screen in accordance with an inclination detected by a sensor. According to an embodiment of the present disclosure, there is provided a control method including displaying a first object on a screen of a display. A second object associated with the first object is displayed on the screen in accordance with an inclination detected by a sensor. As described above, according to one of the embodiments of the present disclosure, it is possible to provide an information processing apparatus adopting, as an unprecedented new input system, an input system using a combination of an input operation made by inclining the information processing apparatus and an input operation made via a touch panel. These and other objects, features and advantages of the present disclosure will become more apparent in light of the following detailed description of best mode embodiments thereof, as illustrated in the accompanying drawings. Brief Description of Drawings FIG. 1 is a front view showing an information processing apparatus according to an embodiment of the present disclosure; FIG. 2 is a block diagram showing an electrical configuration of the information processing apparatus; FIG. 3 is a flowchart showing processing of the information processing apparatus; FIG. 4 is a diagram showing display states on a screen in the case where the processing shown in FIG. 3 is executed; FIG. 5 is a diagram showing display states on the screen in the case where the processing shown in FIG. 3 is executed; FIG. 6 is a diagram for explaining the principle used for displaying in a rotational manner objects constituting respective surfaces of a three-dimensional display object or objects such as an album title and an artist name; FIG. 7 is a flowchart she wing processing when a controller calculates an object rotation angle of a UI (User Interface) object based on a rotation angle of a casing; FIG. 8 is a graph showing an expression used for achieving processing of removing an unintentional hand movement and threshold value processing at a limit angle, and showing a relationship between a rotation angle of the casing and an object rotation angle of an UI object; FIG. 9 is a diagram showing an example of a case where a background image of the three-dimensional display object is changed in accordance with the rotation angle of the casing from the reference point; FIG. 10 is a flowchart showing processing of an information processing apparatus according to another embodiment of the present disclosure; FIG. 11 is a diagram showing display states on a screen in the case where the processing shown in FIG. 10 is executed; FIG. 12 is a diagram for explaining movement processing for a two-dimensional display object or a UI object such as a hidden icon; FIG. 13 is a--flowchart showing processing of an information processing apparatus according to still another embodiment of the present disclosure; FIG. 14 is a diagram showing display states on a screen in the case where the processing shown in FIG. 13 is executed; FIG. 15 is a diagram showing an example of a case where when the casing is rotated by a critical angle or more, a mail delete icon is displayed on a screen; FIG. 16 is a diagram showing an example of a case where when the casing is rotated by a critical angle or more, an icon for operating a reproduction position of content such as music content is displayed; FIG. 17 is a flowchart showing processing of an information processing apparatus according to still another embodiment of the present disclosure; FIG. 18 is a diagram showing display states on a screen in the case where the processing shown in FIG. 17 is executed; FIG. 19 is a flowchart showing processing of an information processing apparatus according to still another embodiment of the present disclosure; FIG. 20 is a diagram showing display states on a screen in the case where the processing shown in FIG. 19 is executed; FIG. 21 is a flowchart showing processing of an information processing apparatus according to still another embodiment of the present disclosure; FIG. 22 is a diagram showing display states on a screen in the case where the processing shown in FIG. 21 is executed; FIG. 23 is a diagram showing-an example-of a case where when the user slides a finger or the like at a position of the screen on which a three-dimensional display object is displayed, the three-dimensional i display object is rotated; and FIG. 24 is a diagram showing an example of a case where an information processing apparatus does not include a display, and a display is separately provided. Detailed description of Embodiments Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Next, a second embodiment of the present disclosure will be described. It should be noted that in the description of the second embodiment and subsequent embodiments, members or the like having the same structures and functions as those in the first embodiment are simply described or not described, and different points from those of the first embodiment will mainly be described. FIG. 10 is a flowchart showing processing of an information processing apparatus 100 according to the second embodiment. FIG. 11 is a diagram showing display states on a screen in the case where the processing shown in FIG. 10 is executed. In Steps 301 to 305 shown in FIG. 10, the same processing as that in Steps 101 to 105 shown in FIG. 3 is executed. In the case where the determination is positive in Steps 301 to 304 (YES of Steps 301 to 304), the controller 14 updates the reference point (Step 305). Upon update of the reference point, the rotation angle of the casing 10 at-that time is a reference, and the rotation angle of the casing 10 is zero. In the case where the rotation angle of the casing 10 is zero, the controller 14 displays a reference image on the screen. In the second embodiment, a reference image is an image shown in the left part of FIG. 11. In the left part of FIG. 11, it is assumed that the reference image is a music reproduction image. A user performs touch and tap operations with a finger or the like at positions on a lower area of the screen 1, on which rewind, pause, and fast forward icons are displayed, to thereby control reproduction, stop, and the like of music. At the center of the reference image, a two-dimensional display object (hereinafter, two-dimensional display object 5) moved on the screen in accordance with the rotation of the casing 10 is displayed. The two-dimensional display object 5 (first object) has an image of a jacket of a track to be reproduced. In Step 306, the controller 14 calculates a rotation angle (about y axis) of the casing 10 from the reference point based on an output of the sensor 13. Next, the controller 14 determines whether the rotation angle of the casing 10 is a limit angle (for example, about 20 degrees to 45 degrees) or more (Step 307). In the case where the rotation angle is less than a limit angle (NO of Step 307), the controller 14 controls the display such that the two-dimensional display object 5 is moved on the screen in accordance with the rotation angle (Step 308). It should be noted that in this case, the controller 14 controls the display such that the two-dimensional display object 5 is moved while being rotated (see broken line of right part of FIG. 11) . Accordingly, ab shown in the right part of FIG. 11, a hidden icon 6 (sebond object) hidden behind the two-dimensional display object 5 gradually emerges on the screen as the rotation angle from the reference point increases. Further, in this case, the controller 14 controls display such that the hidden icon 6 is also moved on the screen in accordance with the rotation angle of the casing 10, similarly to the two-dimensional display object 5. In this case, the hidden icon 6 is moved in the opposite direction of the movement direction of the two-dimensional display object 5. FIG. 12 is a diagram for explaining movement processing for the two-dimensional display object 5 or the UI object 4 such as the hidden icon 6. t As shown in FIG. 12, two UI objects 4 are moved in parallel to each other and in the opposite directions in accordance with the rotation angle of the casing 10, and accordingly it is possible for the user to "recognize a changed perspective. The hidden icon 6 is typically an icon having association with a track to be reproduced in a reference image. For example, the hidden icon 6 is an icon of a track whose artist is the same for the track to be reproduced, or an icon of a track whose field (pops, jazz, etc.) is the same for the track to be reproduced. Alternatively, the hidden icon 6 may be an icon of a moving image or a still image, or the like associated with the track to be reproduced. The-controller 14 calculates movement amounts of the two-dimensional display object 5 and the hidden icon 6 in Step 308 based on the rotation angle of the casing 10. Then, the controller 14 only has to move the two-dimensional display object 5 and the hidden icon 6 on the screen based, on the calculated movement amounts. In the case where the rotation angle of the casing 10 is a limit angle or more (YES of Step 307), the controller 14 stops movement of the two-dimensional display object 5. In this case, the movement of the hidden icon 6 may be stopped or may not be stopped. Next, the controller 14 determines whether the hidden icon 6 is selected with the touch panel 12 (Step 310). In the case where the hidden icon 6 is not selected (NO of Step 310), the controller 14 returns to Step 301. On the other hand, in the case where the hidden icon 6 is selected (YES of Step 310), a command for that hidden icon 6 is issued (Step 311) . [Action etc.] In the second embodiment, when the user rotates the casing 10, the two dimensional display object 5 is moved on the screen in accordance with that rotation operation. Then, the hidden icon 6 hidden behind the two-dimensional display object emerges on the screen in accordance with the rotation operation, or hides behind the two-dimensional display object 5. Accordingly, the user can cause the hidden icon 6 to emerge on the screen or hide behind the two-dimensional display object 5 with the feeling of opening or closing a door (two-dimensional display object 5), at a time when the casing 10 is rotated. Further, in this- embodiment, the two dimensional display object 5 is moved while being rotated at a time of the movement. Accordingly, the feeling of opening or closing a door (two dimensional display object 5) further becomes instinctive Further, in this embodiment, the user can select an icon (hidden icon 6) without moving to another image when a track is reproduced. Accordingly, a load on the' user can be relieved. [Modified example of second embodiment] In the above description, the reference image is a music reproduction image, and the two-dimensional display object 5 is an image of a jacket of a track to be reproduced. However, the reference image may be a moving-image reproduction image. In this case, the two-dimensional display object 5 is a moving image to be reproduced in the moving-image reproduction image. In this case, the hidden icon 6 is typically an icon having association with that moving image. For example, in the case where the moving image is a moving image of a movie or a television program, the hidden icon 6 is an icon of a moving image of another movie or television program, or the like in a common series. Alternatively, in this case, the hidden icon 6 may be an icon of music (sound track) used in another movie or television program, or the like in a common series. Next, a third embodiment of the present disclosure will be described. It should be noted that in an information processing apparatus according to the third embodiment, a controller can simultaneously execute a plurality of application programs (multitask). Examples of the application programs include a mail program, a browsing program, a music reproduction program, a moving image reproduction program, and a telephone directory management program, but the application programs are not limited thereto. FIG. 13 is a flowchart showing processing of an information processing apparatus 100 according to the third embodiment. FIG. 14 is a diagram showing display states on a screen in the case where the processing shown in FIG. 13 is executed. In Steps 401 to 405 shown in FIG. 13, the same processing as that in Steps 101 to 105 shown in FIG. 3 is executed. In the case where the determination is positive in Steps 401 to 404 (YES of Steps 401 to 404), the controller 14 updates the reference point (Step 405). In this case, the reference image is displayed on the screen f (see left part of FIG. 14). In the third embodiment, the reference image (first object) may have any configuration. The reference image is, for example, an image displayed by one of the plurality of application programs. In Step 406, the controller 14 calculates a rotation angle (about y axis) of the casing 10 from the reference point based on an output from the sensor 13. Next, the controller 14 determines whether the rotation angle of the casing 10 is less than a critical angle (for example, about 20 degrees to 45 degrees). In the case where the rotation angle is less than a critical angle (NO of Step 407), the controller 14 returns to Step 401. In the third embodiment,-unlike the embodiments described above, the display on the screen is not changed when the rotation angle is less than a critical angle, and the display remains in the reference image. On the other band, in the case where the rotation angle is a critical angle or more (YES of Step 407), the controller 14 displays an image for selecting one application program from the plurality of application programs (second object) (Step 408) (see right part of FIG. 14). This image includes a page group 8 of application programs. Pages 7 included in the page group 8 correspond to application programs such as a mail program, a browsing program, a music reproduction program, a moving image reproduction program, and a telephone directory management program. The pages 7 may include images of windows currently being opened. Upon display of the page group 8, the controller 14 determines whether fa page 7 is selected with the touch panel 12 (Step 409) Methods of selecting a page 7 include a method performed by a user sliding a finger on the touch panel 12 to move the focus and selecting an optional page by releasing the finger. It should be noted that any selection method for the pages 7 may be used. When determining that a page 7 is selected with the touch panel 12 (YES of Step 409), the controller 14 executes an application corresponding to the selected page 7 (Step 410). In the third embodiment, the user can rotate the casing 10 to cause the page group 8 of the application programs to emerge on the screen, and select an optional application program. Accordingly, the user does not need to repeat screen moving or the like in order to execute another application,. Accordingly, a load on the user can be relieved. Next, a fourth] embodiment of the present disclosure will be described. In the fourth embodiment, in the case where the casing 10 is rotated by a critical angle or more, a mail delete icon 9 is displayed on the screen. FIG. 15 is a diagram showing an example of a case where when the casing 10 is rotated by a critical angle or more, the mail delete icon 9 is displayed on a screen. In the fourth embodiment, it is assumed a case where the reference image is an image of an in-box (first object) (see left part of FIG. 15). The controller; 14 determines whether the rotation angle (about y axis) of the casing 10 from the reference point is a critical angle (about 20 degrees to 45 f degrees) or more. In the case where the rotation angle is less than a critical angle, the mail delete icon 9 (second object) is not displayed on the screen (see left part of FIG. 15). On the other hand, in the case where the rotation angle is a critical angle or more, the controller 14 displays the mail delete icon 9 on the screen. Upon display of the mail delete icon 9, the mail delete icon 9 enters a selectable state. When detecting an input made by the user via the touch panel 12, the controller 14 executes a command of a mail delete icon 9 displayed at a position corresponding to the contact position, an deletes a mail corresponding thereto. Here, there is a case where an icon for deleting contents such as the mail delete icon 9 is mistakenly selected and it is irreversible. On the other hand, in the information processing apparatus 100 according to the fourth embodiment, |an icon 9 for deleting contents is displayed on the screen for the first time when the if casing 10 is rotated by a critical angle or more, and enters an operable state. Accordingly, it is possible to prevent the user from mistakenly deleting content when the user does not intend to delete content. It should be n6ted that in the above description, the mail delete icon 9 emerges on the screen for the first time when the casing 10 is rotated by a critical angle or more, but the configuration is not limited thereto. For example, a configuration in which the mail delete icon 9 emerges on the screen while rotating in accordance with the rotation angle (for example, one rotation) is also conceived. Alternatively, there is conceived a case where the mail delete icon 9 emerges on the screen while the color thereof gradually becomes dark in accordance with the rotation angle. In the above description, the mail delete icon 9 is described as an icon for deleting contents, but icons for' deleting contents may be icons for deleting music contents, moving image contents, still image contents, or the like. Next, a fifth embodiment of the present disclosure will be described. In the fifth embodiment, in the case where the casing 10 is rotated by a critical angle or more, an icon 21 for operating a reproduction position of content such as music content is displayed. FIG. 16 is a diagram showing an example of a case where when the casing 10 is rotated by a critical angle or more, an icon 21, for operating a reproduction position of content such as music content (hereinafter, reproduction position control icon 21) is displayed. In the fifth embodiment, it is assumed that the reference image* is la. music reproduction image (first object) (see left part of FIG. 16) . A user performs touch and tap operations with a finger or the like at positions on a lower area of the screen 1, on which rewind, pause, and fast forward icons are displayed, to thereby control reproduction, stop, and the like of music. The controller 14 determines whether the rotation angle (about x axis) of the casing 10 from the reference point is a critical angle (about 20 degrees to 45 degrees) or more. In the case where the rotation angle is a critical angle or more, the controller 14 displays a reproduction position control icon 21 (second object) at an upper portion of the screen 1 (see center and right part of FIG. 16) . Upon display of the reproduction position control icon 21 on the screen, the reproduction position control icon 21 enters an operable state. In the case where the reproduction position control icon 21 is operated with the touch panel 12, the controller 14 changes a reproduction position of a track in accordance with a change amount of a contact position on the touch panel 12. The user touches a position at which the reproduction position control icon 21 is displayed and slides a finger in a lateral direction, thus optionally selecting a reproduction position of the track. Further, in the case where the rotation angle is a critical angle or more, the controller 14 changes a ratio of the change amount of the reproduction position of the track to the change amount of the contact position on the touch panel 12, in accordance with the rotation angle (see center and right part of FIG. 16). For example, in the case where the protation angle is small, the controller 14 reducss the ratio (center of FIG'. 16) , and in the case where the rotation angle is large, the controller 14 increases the ratio (right part of FIG. 16). Accordingly, even in the case where the user slides a finger on the touch panel 12 in a lateral direction at the same speed, the change amount of the reproduction position becomes small (low speed) in the center of FIG. 16, and the change amount of the reproduction position becomes large (high speed) in the right part of FIG. 16. In the example shown in FIG. 16, by rotating the casing 10, the user can optionally changing the ratio (speed) of the change amount of the reproduction position of the track to the change amount of the contact position on the touch panel 12. In the above description, the reproduction position control icon 21 is described as an icon for operating a reproduction position of music contents, but the reproduction position control icon 21 may be an icon for operating a reproduction position of moving image contents. Next, a sixth embodiment of the present disclosure will-be described. The sixth embodiment is different from the embodiments descried above in that when the user rotates the casing 10 with a finger or the like in contact with the touch panel 12, the display or the like on the screen is changed. Therefore, that point will mainly be described. FIG. 17 is a flowchart showing processing of an information processing apparatus 100 according to the sixth embodiment. FIG. 18 is a diagram showing display states on a screen In the case where the processing shown in FIG. 17 is executed. The controller 14 determines whether contact of a user's finger or the like is detected with the touch panel 12 (Step 501). In the case where contact is not detected, the controller 14 returns to Step 501 and determines whether contact of a user's finger or the like is detected with the touch panel 12 again. In the case where contact is not detected, the display states or the like on the screen are not changed arid an image as shown in the left end part of FIG. 18 is displayed on the screen. In the left end part of FIG. 18, a track selection image 22 (first image) including a plurality of track titles (selection items) is displayed. It should be noted that a state where an image (first image) including selection items such as track titles is displayed on the entire screen will be hereinafter referred to as a first display mode. In the case where contact is detected with the touch panel 12 (YES of Step 501), the controller 14 proceeds to the next Step 502. In Step 502, the controller 14 determines whether a rotatable selection item such as a track title is displayed at a position of on the screen that corresponds to the contact position of the touch panel 12. In the case where a rotatable selection item (track title) is not displayed at the contact position (NO of Step 502), the controller 14 returns to Step 501. On the other hand, in the case where a rotatable selection item (trapk title) is displayed on the contact position (YES of Step 502), a position of the casing 10 at a time when contact is detected is recorded as a reference point (Step 503). Next, the controller 14 calculates a rotation angle (about y axis) of the casing 10 from the reference point based on an output from the sensor 13 (motion sensor) (Step 504) . Upon calculation of the rotation angle of the casing 10, the track selection image 22 is displayed in a rotational manner in accordance with the calculated rotation angle (Step 505) (see" center left part "and center right part of FIG. 18). Further, in this case, the controller 14 displays a track reproduction image 23 (second image) in a rotational manner in accordance with the calculated rotation angle (see center left part and center right part of FIG. 18). The track reproduction image 23 is a track reproduction image 23 of a track selected on the track selection image 22, and has an image of a jacket or the like of the track (see right end part of FIG. 18). In Step 505, the controller 14 calculates rotation angles of the track selection image 22 and, the track reproduction image 23 (UI objects 4) based on the rotation angle of the casing 10, and displays the respective images in a rotational manner about the respective axes (see FIG. 6). The track selection image 22 is displayed in a rotational manner with a left end of the screen 1 as a center axis of the rotation. On the other hand, the track reproduction image 23 is displayed in a rotational manner with a right end of the screen 1 as a center axis of the rotation. It should be noted that in the following description, a state where the uf objects 4 such as the track selection image 22 and the track reproduction image 23 are displayed in a rotational manner in accordance with the rotation angle of the casing 10 (may be displayed with movement) is referred to as a second display mode. In the second display mode, as the rotation angle of the casing 10 becomes large, the track reproduction image 23 gradually emerges on the screen and the track selection image 22 gradually disappears from the screen. Upon display of the track selection image 22 and the track reproduction image 23 in a rotational manner, the controller 14 then determines whether the rotation angle of the casing 10 is a first angle (about 0 degrees to 10 degrees) or more (Step 506). In the case where the rotation angle of the casing 10 is a first angle or more (YES of Step 506), the controller 14 reproduces the selected track (Step 507), and proceeds to Step 508. On the other hand, in the case where the rotation angle of the casing 10 is less than a first angle (NO of Step 506), the controller 14 does not reproduce the track and proceeds to the next Step 508. In Step 508, the controller 14 determines whether, contact with the touch panel 12 is released based on the output from the touch panel 12. In the case where contact with the touch panel 12 is not released (NO of Step 508), the controller 14 calculates a rotation angle of the casing 10 again (Step 504) and displays the respective images 22 and 23 in a rotational manner in accordance with the calculated rotation angle (Step 505). In other words, during a period of time from the detection of the contact with the touch panel 12 to the release of the contact with the touch panel 12, the controller 14 displays the respective images 22 and 23 in a rotational manner! based on the rotation angle of the casing 10. On the other hand, in the case where contact with the touch panel 12 is released (YES of Step 508), the controller 14 determines whether the rotation angle of the casing 10 at a time when contact is released is a second angle (about 20 degrees to 45 degrees) or more (Step 509) . In the case where the rotation angle of the casing 10 at a time when contact is released is less than a second angle (NO of Step 509), the controller 14 displays the track selection image 22 on the screen (Step 510) (center left part of FIG. 18 to left end part of FIG. 18) (second display mode to first display mode). In other words, in the case where the rotation angle of the casing 10 at a time when contact is released is less than a second angle, the selection and determination of a track selected on the track selection image 22 is cancelled and the track selection image 22 is displayed on the screen again. Upon display of the track selection image 22 on the screen, the controller 14 returns to Step 501 again and determines whether the touch panel 12 is touched. On the other hand, in the case where the rotation angle of the casing 10 at a time when contact is released is a second angle or more (YES of Step 509), the controller 14 displays the track reproduction image 23 on the screen (Step 511) (center right part of FIG. 18 to right end part of FIG. 18 (second display mode to third display mode). In other words, in the case where the rotation angle of the casing 10 at a time when contact is released is a second angle or more, a track selected on the track selection image 22 is determined and a track reproduction image 23 of the track is displayed on the screen. It should be noted that a state where the track reproduction image 23 (image after selection and determination) is displayed on the entire screen 1 will be hereinafter referred to as a third display mode. In the state where the track reproduction image 23 is displayed (third display mode), a user performs touch and tap operations with a finger or the lie at positions on a lower area of the screen 1, on which rewind, pause, and fast forward icons are displayed, to thereby control reproduction, stop, and the like of music. It should be noted that in this embodiment, at a time when the second display mode is switched to the third display mode (center right part ©f FIG. 18 to right end part of FIG. 18), the reproduction of the track has been started (see Step 507). [Action etc.] Through the processing shown in FIG. 17, the user touches with a finger an area of the track selection image 22 where an optional selection item (track title) is displayed, and rotates the casing 10 with the finger being in contact with the area, and accordingly a track reproduction image 23 of the track can be gradually caused to emerge on the screen. The user visually recognizes the track reproduction image 23 (including image of a jacket or the like of the track), and accordingly can grasp details or the like of the track . It should be noted that in this embodiment, in the case where the rotation single of the casing 10 is the first angle or more, the track is started to be reproduced, with the result the details of the track selected on the track selection image 22 can be grasped more easily. Further, if the user releases the finger from the touch panel 12 in a state where the rotation angle of the casing 10 is less than the second angle, it is possible to cancel the selection item (track title) selected on the track selection image 22 and display the track selection image 22 again on the screen (center left part of FIG. 18 to center right part of FIG. 18). Accordingly, in the case where the track selected on the track selection image 22 is not a desired track, the user can release the finger from the touch panel 12 to display the track selection image 22 again on the screen, and look for a desired track quickly. On the other hand, in the case where a track selected on the selection image is a desired track, the user rotates the caging 10 to a large degree (second angle or more) and releases the finger from the touch panel 12,-to-thereby select and determine the track and cause the track reproduction image 23 to be displayed on the screen (center right part of FIG. 18 to right end part of FIG. 18). [Modified example of sixth embodiment] In the case where a specific position of the track reproduction image 23 is touched in the third display mode (right end part of FIG. 18), the third display mode may be switched to the second display mode (center left part and center right part of FIG. 18) In the above description, in the second display mode, the track selection image 22 and the track reproduction image 23 are displaed in a rotational manner in accordance with the rotation angle. However, the track selection image 22 fend the track reproduction image 23 may be moved in parallel to each other and in the opposite directions in accordance with the rotation angle in the second display mode (see FIG. 12). Alternatively, there is conceived a case where as the rotation angle becomes large, the color of the track selection image 22 becomes light and the color of the track reproduction image 23 becomes dark. In the above description, in the second display mode, the track selection image 22 and the track reproduction image 23 are displayed in a rotational manner in accordance with the rotation angle of the casing 10 about the y axis, with an axis of the y-axis direction as a center axis. On the other hand, the track selection image 22 and the track reproduction image 23 can be configured to be displayed in a rotational manner in accordance with the rotation angle of the casing 10 about the x axis with the axis of an x-axis -direct-ion-as a center axis. Alternatively, a combination of the above is also possible. In this case, an image after selection and determination (becond image) can be differentiated in accordance with a rotation direction. In the above description, the first image (image including selection items) is a track selection image 22 and the second image is (image after selection and determination) is a track reproduction image 23. However, the combination of the first image and the second image is not limited to the above. For example, the first image may be a moving-image selection image, and the second image may be a moving-image reproduction image. In this case, the reproduction of the moving image may be started in the case[of a first angle or more of the casing 10. Alternatively, examples of the combination of the first image and !the second image include a case where the first image is k selection image of an application program and the second image is an image of a window displayed by the application program. Typically, if the first image is an image including selection items and the second image is an image obtained after the selection item is selected an a determined, the embodiment of the present disclosure can be applied to any cases. Next, a seventh embodiment of the present disclosure will be described. FIG. 19 is a flowchart showing processing of an information processing apparatus 100 according to the seventh embodiment. FIG. 20 is a diagram showing display states on a screen in the case where the processing shown in FIG. 19is executed. As shown in FIG. 20, in the seventh embodiment, a first image is assured to be a text image 24 of foreign language such as English (image including selection items of character information) (see left end part of FIG. 20). The text image 24 of foreign language includes selection items (selection items of character information) such as words and idioms. Further, in the seventh embodiment, a second image is assumed to be a translation image 25 of a selected word, idiom, or the like (image including information relating to character information) (see right end part of FIG. 20). It should be noted that in FIG. 20, a case is assumed where a word of "optimization" is selected as a selection item, and a translation image 25 of "optimization" emerges as a second image on the screen in accordance with the rotation angle. The controller 14 determines whether the touch panel 12 is touched (Step 601), and if contact is detected (YES of Step 601), the controller 14 determines whether a selection item such as a word is displayed at a contact position of the touch panel 12 (Step 602). In the case where a selection item such as a word is selected (YES of Step 602), a position of the casing 10 at that time is recorded as a reference point (Step 603), and the rotation angle of the casing 10 is calculated (Step 604). Next, the controller 14 displays the text image 24 of foreign language and the translation image 25 in a rotational manner in accordance with the rotation angle of the casing 10 (Step 605). During a period of time from the detection of the contact with the touch panel 12 to the release of the contact, the controller 14 displays the text image 24 of foreign language an the translation image 25 in a rotational manner in accordance with the rotation angle of the casing 10 (drop of NO in Steps 604 to 606) (center left part and center right part of FIG. 20) (second display mode). In the case where contact with the touch panel 12 is released (YES of Step 606), the controller 14 determines whether the rotation angle of the casing 10 at a time when contact is released is a predetermined angle (for example, about 20 degrees to 45 degrees) or more (Step 607) . In the case Where the rotation angle is less than the above-mentioned, 'degree, the controller 14 displays the text image 24 o£ foreign language on the screen (Step 608) (center left part of FIG. 20 to left end part of FIG. 20) (second display mode to first display mode). On the other hand, in the case of the above-mentioned angle or more, the controller 14 displays the translation image 25 on the screen (Step 609) (center right part of FIG. 20 to right end part of FIG. 20) (second display mode to third display mode). In the seventh embodiment, the user touches with a finger an area of the text image 24 of foreign language, in which a word that the user does not know is displayed, and rotates the casing 10 with the finger being in contact with the area. Accordingly, the user can cause a translation image 25 of the word to emerge on the screen. The user visually recognizes the translation image 25, and accordingly can check the meaning of the word. When the check is ended, the user only has to release the finger from the touch panel 12 in a state where the rotation angle of the casing 10 is smaller than the above-mentioned angle. Accordingly, the text image 24 of foreign language can be displayed again. On the other hand, in the case where the user intends to check the meaning of the word in details, the user only has to release the finger from the touch panel 12 in a state where the casing 10 is rotated to a large degree (by the above-mentioned angle or more). * Accordingly, the translation image 25 is displayed on the screen and the meaning of the word can be checked in details. In the case where a specific position of the translation image 25 is touched in the third display mode (right end part of FIG. 20), the third display mode may be switched to the second display mode. In the above description, the first image is the text image 24 of foreign language, and the second image is the translation image 25. However, the first image can be a search image on the web (image including search word), and the second image can be an image of a search result (image including information on search word). Next, an eighth embodiment of the present disclosure will be described. FIG. 21 is a flowchart showing processing of an information processing apparatus 100 according to an eighth embodiment. FIG. 22 is a diagram showing display states on a screen in the case where the processing shown in FIG. 21 is executed. The controller! 14 determines whether the touch panel 12 is touched (Step 701). In the ease where contact is detected (YES of Step 701), the controller 14 determines whether a three-dimensional display object 26 is displayed at a position on the screen that corresponds to the contact position (Step 702). In the case where a three-dimensional display object 26 is displayed (YES of Step 702), the controller 14 records a position of the casing 10 at a time when contact is detected, as a reference point (Step 703). Next, the controller 14 calculates the rotation angle of the casing 10 after the detection of the contact (Step 704), and displays the three-dimensional display object 2 6 in a rotational manner in accordance with the rotation angle of the casing 10 (Step 705). During a period of time from the detection of the contact with the touch panel 12 to the release of the contact, the controller 14 displays the three-dimensional display object 26 in a rotational manner in accordance with the rotation angle of the casing 10 (loop of NO in Steps 704 to 706). In the case where contact with the touch panel 12 is released (YES of Step 706), the controller 14 returns to Step 701 again and determines whether contact with the touch panel 12 is detected. Through the processing shown in FIG. 21, as shown in FIG. 22, the user repeats an operation of rotating the casing 10 while touching the touch panel 12 and an operation of rotating the casing 10 in the opposite direction without touching the touch panel 12, to thereby display a side surface, a rear surface, or the like of the three-dimensional display object 26. It should be noted that in FIG. 22, an example is shown in which when) the casing 10 is rotated about the y axis, the three-dimensional display object 26 is rotated about the y axis, however, when the casing 10 is rotated about the x axis, the three-dimensional display object 26 may be rotated about the x axis. It should be noted that the three-dimensional display object 26 may be displayed in a rotational manner about both the x axis and the y axis. In FIG. 22, the three-dimensional display object 26 is a hexahedron. However, the shape of the three dimensional display object 2 6 may be another polyhedron such as a tetrahedron, a sphere, or the like. The shape of the three-dimensional display object 26 is not particularly limited. In the case where the three-dimensional display object 26 has a plurality of surfaces, icons may be assigned to the respective surfaces. In this case, a selectable icon is switched in accordance with the angle of the casing 10 (see first embodiment described above). Accordingly, the user rotates the casing 10 with the finger or the like being in contact with the touch panel 12 to rotate the three-dimensional display object 26, to thereby cause an optional icon to be displayed on the screen for selection. In the case where the three-dimensional display object 26 includes a plurality of icons, those icons may have mutual association. It should be noted that when icons are assigned to respective surfaces, an optional icon is selected and determined in an operation such as a tap operation. Accordingly, when-the user touches a display position of the three-dimensional display object 26 in order to rotate the three-dimensional display object 26, an icon can be prevented from being selected and determined by the user. In the case where the user slides a finger or the like at a position of the screen on which the three-dimensional display' object 26 is displayed, the three-dimensional display object 26 may be configured to be rotated. FIG. 23 is a diagram showing an example of a case where when the user slides a finger or the like at a position of the screen on which the three-dimensional display object 26 is displayed, the three-dimensional display object 26 is rotated. As shown in the left end part and the center left part of FIG. 23, the user touches with a finger or the like a position where the three-dimensional display object 26 is displayed, and rotates the casing 10 while maintaining this state. Then, the three-dimensional t display object 26 is displayed in a rotational manner on the screen (Steps 701 to 706). In addition, as shown in the center right part and the right end part of FIG. 23, when the user slides the finger or the like at a position of the screen on which the three-dimensional display object 26 is displayed, the three-dimensional display object 26 is rotated. In this case, the controller 14 only has to display the three-dimensional display object 26 in a rotational manner based on information of the change amount of the contact position from the pouch panel 12. Accordingly, the user can rotate the three-dimensional display object 26 by rotating the casing 10 while touching the touch panel 12, or can rotate the three-dimensional display object 26 by sliding a finger at a position where the three-dimensional display object 26 is displayed. Accordingly, a surface such as a) rear surface of the three-dimensional display object 26 can be displayed on the screen with ease. In the description of FIG. 23, when the user rotates the casing 10 while touching a position at which the three-dimensional display object 26 is displayed, the three-dimensional display object 26 is displayed in a rotational manner, but the present disclosure is not limited thereto. The example shown in FIG. 22 can also be applied to a configuration in which the reference point is automatically updated, which has been described in the first embodiment to fifth embodiment. In the embodiments described above, the motion sensor has been exemplified as the sensor 13 that detects the inclination of the information processing apparatus. However, the sensor 13 that detects the inclination of the information processing apparatus is not limited to the motion sensor. For example, for the sensor 13, image sensors such as a CCD (Charge Coupled Device) sensor and a CMOS (Complementary Metal Oxide Semiconductor) sensor may be used. In this case, an image sensor is provided on the front side of the casing 10. In this case, the controller 14 determines a position or an angle of the face of the user based on an image captured by the image sensor. The controller 14 can detect the inclination of the -information processing apparatus with respect to the face of the user based on a change of the position of the face within the image or a change of the angle of the face. It should be noted that in the case where the image sensor is used as the sensor 13 in the first to fifth embodiments, the reference point is obtained when the face of the user is positioned in front of the casing 10. In recent years, there is a case where an image sensor 13 such as a CCD sensor 13 may be arranged on the front side of the casing 10 for the purpose of video chat or the like. The image sensor 13 may be effectively used as a sensor 13 for calculating the rotation angle. In this case, const reduction is achieved. Alternatively, the sensor 13 may be a combination of a motion sensor and an image sensor. In this case, the position accuracy of a reference point, calculation accuracy of a rotation angle, or the like can be improved. There is conceived a case where the information processing apparatus does not include a display and a display is separately provided. FIG. 24 is a diagram showing an example of a case where an information processing apparatus 101 does not include a display 11, and a display is separately provided. The information processing apparatus 101 shown in FIG. 24 does not include a display 11. A UI such as a three-dimensional display object 27 is displayed on a screen of a display apparatus 102 such as a liquid crystal display apparatus or a television apparatus. In this case, when a user rotates -the casing 10 while touching the touch panel 12, the three-dimensional display object 27 is displayed in a rotational manner on the screen. The present disclosure contains subject matter related to that disclosed in Japanese Priority Patent Application JP 2010-199819 filed in the Japan Patent Office on September 7, 2010, the entire' content of which is hereby incorporated by reference. It should be understood by those skilled in the art that various modifications, combinations, sub combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof. What is claimed is: 1. An information processing apparatus, comprising: a display having a screen; a sensor configured to detect an inclination; and a controller configured to display a first object on the screen and display a second object associated with the first object on the screen in accordance with the inclination detected by the sensor. 2. The information processing apparatus according to claim 1, further comprising a touch panel configured to detect contact, wherein the second object is an object operable with the touch panel. 3. The information processing apparatus according to claim 2, wherein the controller switches availability of an operation of the second object using the touch panel in accordance with the inclination. 4. The information processing apparatus according to claim 3, wherein the first object-is an-object-operable with the touch panel. 5. The information processing apparatus according to claim 4, wherein the controller switches a first state where the first object is operable with the touch panel and a second state where the second object is operable with the touch panel in accordance with the inclination. 6. The information processing apparatus according to claim 5, wherein the controller displays in a rotational manner a three-dimensional display object having a first surface serving as the first object and a second surface serving as the second object in accordance with the inclination, to thereby display the second object on the screen in accordance with the inclination. 7. The information processing apparatus according to claim 6, wherein the controller controls display such that the three-dimensional display object is hardly rotated in a case where an angle of the inclination is less than a predetermined value, and such that a rotation speed of the three-dimensional display object becomes higher as the inclination increases in a case where the angle of the inclination is the predetermined value or more. 8. The information processing apparatus according to claim 6, wherein the controller determines a position of a virtual camera in accordance with the inclination, and changes a background image of the three-dimensional display object in accordance with the position of the virtual camera. 9. The information processing apparatus according-to claim 3, wherein the controller moves the first object and the second object in directions different from each other in accordance with the inclination, to thereby display the second object on the screen in accordance with the inclination. 10. The information processing apparatus according to claim 9, wherein the controller, moves the first object while rotating the first object. 11. The information processing apparatus according to claim 3, wherein the first object is an image displayed when content is reproduced, the second object is an object for operating a reproduction position of the content, and the controller changes, in a case where the second object is operated with the touch panel, the reproduction position in accordance with a change amount of a contact position of the touch panel. 12. The information processing apparatus according to claim 11, wherein the controller changes a ratio of a change amount of the reproduction position of the content to the change amount of the contact position of the touch panel, in accordance with the inclination. 13. The information processing apparatus according to claim 3, wherein the controller can simultaneously execute a plurality of application programs, the -first object is -an image displayed by one of the plurality of application programs, and the second object is an image for selecting one of the plurality of application programs. 14. The information processing apparatus according to claim 3, wherein the first object is an image indicating content, and the second object is an icon for deleting content. 15. The information processing apparatus according to claim 1, wherein the controller can update a reference point serving as a reference of the inclination. 16. The information processing apparatus according to claim 15, wherein the controller determines whether an angle of the inclination is a predetermined threshold value or more, and updates the reference point when the angle of the inclination is the predetermined threshold value or more. 17. The information processing apparatus according to claim 15, wherein the controller determines whether the contact with the touch panel is not detected for a predetermined period of time or more and updates, in the case where the contact is not detected for the predetermined period of time or more, a position of the information processing apparatus at that time as the reference point. 18. The information processing apparatus according to claim 15, wherein the controller determines whether a change amount of the inclination is less than a predetermined threshold value within a predetermined period of time and updates, in the case where an -angle of the -inclination -is less than the predetermined threshold value, a position of the information processing apparatus at that time as the reference point. 19. A program causing an information processing apparatus to execute: displaying a first object on a screen of a display; and displaying a second object associated with the first object on the screen in accordance with an inclination detected by a sensor. 20. A control method, comprising: displaying a first object on a screen of a display; and displaying a second object associated with the first object on the screen in accordance with an inclination detected by a sensor.