Back-lighted autostereoscopic display

• US 20010005284A1
• Filed: 12/21/2000
• Published: 06/28/2001
• Est. Priority Date: 12/24/1999
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lee, Kuen, Tsai, Chao-Hsu
• Granted Patent: US 6,542,296 B2
• Time in Patent Office: Days
• US Class Current: 359/619
• CPC Class Codes: G02B 30/26 of the autostereoscopic type
• CPC Class Codes: H04N 13/305 using lenticular lenses, e.g. arrangements of cylindrical lenses
• CPC Class Codes: H04N 13/337 using polarisation multiplexing
• CPC Class Codes: H04N 13/368 for two or more viewers
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

A back-lighted autostereoscopic display. A uniform light is emitted from a plane light source. A polarization plate is disposed in front of the plane light source to polarize the uniform light into a polarized light. A micro-moving window device is disposed in front of the polarization plate to selectively change the polarity of the polarized light into another type of polarization. A micro-optical device is located in front of the micro-moving window device, thereby both the polarized light changed and unchanged pass through the micro-optical device to travel further. An imaging apparatus is located in front of the micro-optical device, so that the lights are converged into the eyes of an observer. A liquid crystal display panel with a patterned half-wavelength phase retarder according to the even rows and odd rows of the interlaced image displayed on the liquid crystal display is located in front of the imaging apparatus to project the stereo-image to the observer.

Claims

1. A back-lighted autostereoscopic display, comprising:

a light source,

a micro-moving window device, in front of the light source and comprising a plurality of micro-moving window elements, wherein each micro-moving window element further comprising at least one micro-moving window;

a micro-optical device, in front of the micro-moving window device and comprising a plurality of micro-lens, wherein an amount of the micro-lenses is the same as an amount of the micro-moving window elements, and each of the micro-moving window elements is aligned with a micro-lens;

a imaging apparatus in front of the micro-optical device; and

a liquid crystal display panel in front of the imaging apparatus, the area of the display panel can be covered by the imaging apparatus.

2. The display according to

claim 1

, wherein the micro-moving window device is located on a focal plane of the array of micro-lenses.

3. The display according to

claim 1

, comprising further a tracking system coupled to the micro-moving window device.

4. The display according to

claim 1

, comprising further a charge-coupled device as a tracking system coupled to the micro-moving window device to monitor at least one observer.

5. The display according to

claim 1

, wherein the micro-moving window device comprises a liquid crystal display.

6. The display according to

claim 1

, wherein the micro-lens comprises a lenticular lens array.

7. The display according to

claim 1

, wherein the liquid crystal display panel comprises a liquid crystal display panel with a micro-retarder

8. The display according to

claim 1

, wherein the micro-moving window device is coupled to a tracking system, so as to project lights onto a left eye and a right eye of an observer with different polarization.

9. An apparatus for providing a back light with stereo effect for a liquid crystal display panel, the apparatus comprising:

a light source, a uniform light emitted from the plane light source;

a micro-moving window device, in front of the light source and coupled with a tracking system to selectively change polarity of the uniform light emitted from the light source, wherein the micro-moving window device comprising a plurality of micro-moving window elements; and

an array of micro-lens, of which a focal plane is at which the micro-moving window device located, wherein an amount of the micro-lenses is the same as an amount of the micro-moving window elements, and each of the micro-moving window elements is aligned with a micro-lens.

10. The apparatus according to

claim 9

, wherein the micro-moving window device comprises a liquid crystal display.

11. The apparatus according to

claim 9

, wherein the micro-lenses comprise lenticular lenses array.

12. The apparatus according to

claim 9

, wherein the lights travelling through the array of micro-lens are then converged to left and right eyes of an observer by an imaging apparatus.

13. The apparatus according to

claim 9

, wherein a liquid crystal panel with a micro-retarder is located between the imaging apparatus and the observer.

14. An apparatus to provide a stereo-image for a liquid crystal display, the apparatus comprising.

a light source, to emit a uniform plane light;

a micro-moving window device in a plurality of micro-moving window elements, wherein each micro-moving window element further comprising at least one micro-moving window, the light passing through the micro-moving windows is the first type polarized light, and is converted into a second polarized type light passing through positions of the micro-moving window elements other than the micro-moving windows; and

a plurality of micro-lens, having a focal plane at which the micro-moving window device is located, wherein an amount of the micro-lenses is the same as an amount of the micro-moving window elements, and each of the micro-moving window elements is aligned with a micro-lens.

15. The apparatus according to

claim 14

, wherein the micro-moving window device is further coupled to a tracking system.

16. The apparatus according to

claim 14

, wherein the micro-moving window device comprises a liquid crystal display penal.

17. The apparatus according to

claim 14

, wherein the micro-lenses comprise lenticular lenses array.

18. The apparatus according to

claim 14

, wherein the liquid crystal display further comprises:

an imaging apparatus with an area large enough to cover all the first and second type of polarized lights passing through the micro-lens and the following liquid crystal display panel; and

a liquid crystal panel with a micro-retarder to provide a phase retardation for an observer without using a pair of polarization glasses.

19. The apparatus according to

claim 18

, wherein the imaging apparatus comprises a Fresnel lens or a conventional convex lens.

20. The apparatus according to

claim 18

, wherein the imaging apparatus comprises a holographic optical element.