Stereo-image displaying apparatus and method for reducing stereo-image cross-talk

• US 8,786,539 B2
• Filed: 02/08/2007
• Issued: 07/22/2014
• Est. Priority Date: 08/16/2006
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lee, Kuen, Huang, Kuo-Chung, Tsai, Chao-Hsu
• Primary Examiner(s): Cheng, Joe H
• Assistant Examiner(s): CRAWLEY, KEITH L
• Application Number:
  US11/672,521
• Publication Number:
  US 20080042924A1
• Time in Patent Office: 2,721 Days
• Field of Search: None
• US Class Current: 345/102
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: H04N 13/00 Stereoscopic video systems; Multi-view video systems; Details thereof
• CPC Class Codes: H04N 13/315 the parallax barriers being time-variant
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

A stereo-image displaying apparatus includes a light-source module and an image displaying device. The light-source module has at least one light-emitting block. A light-source driving unit is coupled with the light-source module and the image displaying device. The light-emitting block is driven by the light-source driving unit to synchronously emit a light according to a displaying frequency of the image displaying device with a reduced light-emitting duty cycle. The cross-talk between stereo images is reduced by using the light emitted from the light-source module, synchronously associating with the image displaying device.

Claims

1. A stereo-image displaying apparatus, comprising:

a light-source module including at least one light-emitting block;

a light-source driving unit, coupled with the light-source module, wherein the light emitting block is driven by the light-source driving unit to periodically emit a light according to a duty cycle; and

a stereo-image displaying panel, changing an image at an image displaying frequency, wherein a stereo image composed from a left-eye image and right-eye image is lit and presented to the viewers'"'"' eyes by the light-source module which is synchronously controlled to emit light by the light-source driving unit.

2. The stereo-image displaying apparatus of claim 1, wherein the duty cycle has a predetermined minimum corresponding to the human eye capability.

3. The stereo-image displaying apparatus of claim 1, wherein the stereo image is displayed according to a time-multiplexed displaying mechanism.

4. The stereo-image displaying apparatus of claim 1, wherein the stereo image is displayed according to a time/spatial multiplexed displaying mechanism.

5. The stereo-image displaying apparatus of claim 1, wherein the light-source module is a backlight module.

6. The stereo-image displaying apparatus of claim 1, wherein the light-source module is formed from an active luminescence device.

7. The stereo-image displaying apparatus of claim 6, wherein the active luminescent device includes LED, FED or CCFL.

8. The stereo-image displaying apparatus of claim 1, wherein the stereo-image displaying panel is a non-self-illuminating spatial light modulator.

9. The stereo-image displaying apparatus of claim 8, wherein the spatial light modulator comprises a liquid displaying device, a liquid crystal on silicon display device or a holographic image displaying device.

10. The stereo-image displaying apparatus of claim 1, wherein the light emitted by the light-source module turns off before the stereo-image displaying panel changes the image in each time.

11. A method of reducing stereo-image cross-talk, which is suitable for controlling a light-source module of a stereo-image displaying apparatus, comprising:

according to an image displaying period, setting an illuminating duty cycle, and the illuminating duty cycle is less than the image displaying period; and

utilizing a light-source driving unit for controlling the light-source module so as to illuminate according to the illuminating duty cycle, synchronizing to an image displaying frequency.

12. The method of reducing the stereo-image cross-talk of claim 11, wherein the light-source module is a backlight module.

13. The method of reducing the stereo-image cross-talk of claim 11, wherein the light-source module comprises at least a light emitting block driven by the light-source driving unit.

14. The method of reducing the stereo-image cross-talk of claim 11, wherein the stereo-image displaying apparatus utilizes a time multiplexed displaying mechanism to display the stereo-image.

15. The method of reducing the stereo-image cross-talk of claim 11, wherein the stereo-image displaying apparatus utilizes a time/spatial multiplexed displaying mechanism to display the stereo-image.

16. The method of reducing the stereo-image cross-talk of claim 11, wherein the light-source module is an active luminescence device.

17. The method of reducing the stereo-image cross-talk of claim 16, wherein the active luminescence device includes LED, FED or CCFL.

18. The method of reducing the stereo-image cross-talk of claim 11, wherein the stereo-image displaying apparatus is a non-self-illuminating optical device.

19. The method of reducing the stereo-image cross-talk of claim 18, wherein the non-self-illuminating optical device comprises a liquid displaying device, a liquid crystal on silicon display device or a holographic image displaying device.

20. The method of reducing stereo-image cross-talk of claim 11, wherein a light illuminated by the light-source module turns off before the stereo-image displaying apparatus changes a displaying image in each time.