Display Device and Recording Medium

• US 20100245369A1
• Filed: 02/22/2010
• Published: 09/30/2010
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: Casio Hitachi Mobile Communications Company Limited (NEC Corporation)
• Inventors: Yoshino, Ken
• Granted Patent: US 8,760,367 B2
• Time in Patent Office: Days
• US Class Current: 345/522
• CPC Class Codes: G06F 3/1438 using more than one graphics controller
• CPC Class Codes: H04M 1/0222 Foldable in two directions, i.e. using a two degree of freedom hinge
• CPC Class Codes: H04M 1/0235 Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
• CPC Class Codes: H04M 2250/16 including more than one display unit
• CPC Class Codes: H04N 13/315 the parallax barriers being time-variant
• CPC Class Codes: H04N 13/359 Switching between monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/378 for tracking rotational head movements around an axis perpendicular to the screen
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 7/142 Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
• CPC Class Codes: H04N 7/147 Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q

Abstract

The mobile communication terminal comprises a first casing and a second casing carrying a first display part and a second display part, respectively. The first display part and the second display part are each capable of 3D display. The controller of the mobile communication terminal detects the mobile communication terminal being opened vertically or horizontally and detects the opening angle between the first casing and the second casing. In the 3D display in the horizontal opened state, the visibility of the 3D display is altered as the opening angle is changed. Therefore, the controller of the mobile communication terminal calculates the viewing angle according to the detected opening angle and changes the parameters for the 3D display, whereby excellent visibility is maintained even if the opening angle is changed.

Claims

1. A display device including:

a first casing having a first display screen; and

a second casing movably coupled to the first casing and having a second display screen;

wherein the display device comprises;

a display unit providing three-dimensional image display on both of the first display screen and the second display screen;

a coupling state detection unit detecting the coupling state between the first casing and the second casing;

a viewing angle calculation unit calculating the viewing angle to the three-dimensional image display by the display unit based on the coupling state detected by the coupling state detection unit; and

a display control unit selecting parameters used by the display unit for providing the three-dimensional image display based on the coupling state detected by the coupling state detection unit and the viewing angle calculated by the viewing angle calculation unit.

2. The display device according to claim 1 wherein the display unit controls the first display screen and the second display screen in an interlocking manner based on the parameters selected by the display control unit for providing the three-dimensional image display.

3. The display device according to claim 1 wherein:

the display device is a folding type display device in which the first casing and the second casing are coupled in an openable/closable manner;

the coupling state detection unit at least detects the angle between the first casing and the second casing; and

the viewing angle calculation unit calculates the viewing angle based on the angle detected by the coupling state detection unit.

4. The display device according to claim 3, further comprises

a visibility check unit determining whether or not the visibility of the display by the folding type display device is good based on the angle detected by the coupling state detection unit, wherein:

the display unit does not provide the three-dimensional image display using the first display screen and/or the second display screen when the visibility check unit determines that the visibility is not good.

5. The display device according to claim 1 wherein:

the display device is a sliding type display device in which the first casing and the second casing are coupled in a slidable manner;

the coupling state detection unit at least detects the slide distance between the first casing and the second casing; and

the viewing angle calculation unit calculates the viewing angle based on the slide distance detected by the coupling state detection unit.

6. The display device according to claim 5, further comprises

a visibility check unit determining whether or not the visibility of the display on the first or the second display screen is good based on the slide distance detected by the coupling state detection unit, wherein

the display unit does not provide the three-dimensional image display using the first display screen and/or the second display screen when the visibility check unit determines that the visibility is not good.

7. The display device according to claim 1 further comprises

an expansion direction detection unit detecting the expansion direction of the first display screen and the second display screen, wherein:

the display control unit selects the parameters when the horizontal expansion of the first display screen and the second display screen is detected.

8. The display device according to claim 1 further comprises a parameter storing unit at least storing parameters regarding the matters detected by the coupling state detection unit as condition parameters.

9. The display device according to claim 8 wherein the parameter storing unit stores control parameters associated with the condition parameters and used by the display unit for display operation.

10. The display device according to claim 8 wherein:

the parameter storing unit stores only the parameters used in the three-dimensional image display using the first display screen and the second display screen expanded in the horizontal direction; and

the display control unit selects the parameters for viewing the three-dimensional image display squarely to the first or the second display screen among the parameters stored in the parameter storing unit and used for the three-dimensional image display using the first display screen and the second display screen expanded in the horizontal direction when the vertical expansion of the first display screen and the second display screen is detected.

11. The display device according to claim 8 wherein the display control unit identifies the condition parameters based on the coupling state detected by the coupling state detection unit and the viewing angle calculated by the viewing angle calculation unit and selects the control parameters specified by the identified condition parameters.

12. The display device according to claim 7 wherein the display unit does not provide the three-dimensional image display using the first display screen and/or the second display screen when the expansion direction detection unit detects the expansion neither in the horizontal direction nor in the vertical direction.

13. The display device according to claim 1 wherein the parameters include parameters defining the projection distance in the three-dimensional image display.

14. A display device including:

a first casing having a first display screen; and

a second casing movably coupled to the first casing and having a second display screen;

wherein the display device comprises;

a display unit providing three-dimensional image display on both of the first display screen and the second display screen;

a coupling state detection unit detecting the coupling state between the first casing and the second casing; and

a display control unit providing the three-dimensional image display on the first display screen and the second display screen with different projection distances based on the coupling state detected by the coupling state detection unit.

15. The display device according to claim 14 wherein the display control unit provides the three-dimensional image display on the first display screen and the second display screen with different projection distances depending on the display position based on the coupling state detected by the coupling state detection unit.

16. The display device according to claim 14, further comprises

a viewing angle calculation unit calculating the viewing angle to the three-dimensional image display by the display unit based on the coupling state detected by the coupling state detection unit, wherein

the display unit provides the three-dimensional image display on both of the first display screen and the second display screen based on the coupling state detected by the coupling state detection unit and the viewing angle calculated by the viewing angle calculation unit.

17. A recording medium for recording a program that allows a computer controlling a display device including:

a first casing having a first display screen; and

a second casing movably coupled to the first casing and having a second display screen to realize the following functions;

providing three-dimensional image display on both of the first display screen and the second display screen;

detecting the coupling state between the first casing and the second casing;

calculating the viewing angle to the three-dimensional image display based on the detected coupling state; and

selecting the parameters used for providing the three-dimensional image display based on the detected coupling state and calculated viewing angle.

18. A recording medium for recording a program that allows a computer controlling a display device including:

a first casing having a first display screen; and

a second casing movably coupled to the first casing and having a second display screen to realize the following functions;

providing three-dimensional image display on both of the first display screen and the second display screen;

detecting the coupling state between the first casing and the second casing; and

providing the three-dimensional image display on the first display screen and the second display screen with different projection distances based on the detected coupling state.