System and method for electro-optically producing and displaying spectrally-multiplexed images of three-dimensional imagery for use in stereoscopic viewing thereof

• US 5,745,164 A
• Filed: 01/17/1997
• Issued: 04/28/1998
• Est. Priority Date: 11/12/1993
• Status: Expired due to Fees

• Current Assignee: Reveo, Inc.
• Original Assignee: Reveo, Inc.
• Inventors: Faris, Sadeg M.
• Primary Examiner(s): Britton, Howard W.
• Application Number:
  US08/784,979
• Time in Patent Office: 466 Days
• Field of Search: 348/60, 348/42, 348/43, 348/47, 348/51
• US Class Current: 348/60
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: H04N 13/15 for colour aspects of image signals
• CPC Class Codes: H04N 13/161 Encoding, multiplexing or demultiplexing different image signal components for multi-view video sequence encoding H04N19/597
• CPC Class Codes: H04N 13/189 Recording image signals; Reproducing recorded image signals
• CPC Class Codes: H04N 13/194 Transmission of image signals
• CPC Class Codes: H04N 13/211 using temporal multiplexing
• CPC Class Codes: H04N 13/214 using spectral multiplexing
• CPC Class Codes: H04N 13/218 using spatial multiplexing
• CPC Class Codes: H04N 13/239 using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 13/257 Colour aspects
• CPC Class Codes: H04N 13/275 from 3D object models, e.g. computer-generated stereoscopic image signals
• CPC Class Codes: H04N 13/286 having separate monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/334 using spectral multiplexing
• CPC Class Codes: H04N 13/337 using polarisation multiplexing
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 19/597 specially adapted for multi-view video sequence encoding

Abstract

A Method and apparatus is provided for producing and displaying pairs of spectrally-multiplexed gray-scale or color images of 3-D scenery for use in stereoscopic viewing wherein pairs of spectrally-multiplexed color images of 3-D scenery are produced using a camera system records left and right color perspective images thereof and optically processes the spectral components thereof. In another illustrative embodiment, pairs of spectrally-multiplexed color images of 3-D imagery are produced within a computer-based system which generates left and right perspective images thereof using computer graphic processes, and processes the pixel data thereof using pixel-data processing methods. Thereafter, produced pairs of spectrally-multiplexed images can be recorded on diverse recording mediums, and accessed by the display system for real-time display on diverse display surfaces including, for example, flat-panel liquid-crystal display (LCD) surfaces, CRT display surfaces, projection display screen surfaces, and electro-luminescent panel display surfaces. In the display system, stereoscopic viewing of 3-D imagery is facilitated by wearing electrically passive or electrically-active light polarizing spectacles during the image display process of the present invention.

Claims

1. A system for visually presenting a pair of spectrally-multiplexed images of a three-dimensional scene for use in stereoscopic viewing thereof by a viewer having left and right eyes, said system comprising:

image display means for sequentially displaying a first spectrally-multiplexed image during a first display period and a second spectrally-multiplexed image during a second display period, said first spectrally-multiplexed image having a first group of spectral components obtained from a first perspective image of said three-dimensional scene and a second group of spectral components obtained from a second perspective image of said three-dimensional scene, and said second spectrally-multiplexed image having a second group of spectral components obtained from said first perspective image of said three-dimensional scene and a first group of spectral components obtained from said second perspective image; and

electro-optical image processing apparatus, disposed between said image display means and the left and right eyes of the viewer, for alternatively processing said first and second spectrally-multiplexed images as said first and second spectrally-multiplexed images are visually presented to the left and right eyes of the viewer by said image presentation means, said electro-optical image processing means being operable during said first display period for processing said first spectrally-multiplexed image so as to selectively transmit only the first group of spectral components of said first perspective image to the left eye of the viewer and only the second group of spectral components of said second perspective image to the right eye of the viewer during said first display period, and said electro-optical image processing apparatus being operable during said second display period for optically processing said second spectrally-multiplexed image so as to selectively transmit only the second group of spectral components of said first perspective image to the left eye of the viewer and only the first group of spectral components of said second perspective image to the right eye of the viewer during said second display period,

whereby the first and second groups of spectral components of said first perspective image are transmitted from said image display means to the left eye of the viewer over said first and second display periods, and the first and second groups of spectral components of said second perspective image are transmitted from said image display means to the right eye of the viewer over said first and second display periods so that said three-dimensional scene can be stereoscopically viewed by the left and right eyes of the viewer.

2. The system of claim 1, wherein said image display means comprises an image display panel, and wherein said electro-optical image processing apparatus comprises eyewear having a first electro-optical elements positionable in front of the left eye of the viewer and a second electro-optical lens positionable in front of the right eye of the viewer.

3. The system of claim 2, wherein said first electro-optical element comprises

first optically transparent input surface through which the first and second groups of spectral components can enter said first electro-optical element,

first optically transparent output surface through which the first and second groups of spectral components can exit said first electro-optical element, and

first spectral-component transmission means, disposed between the first optically transparent input and output surfaces of said first electro-optical element, for transmitting the first group of spectral components of said first perspective image to the left eye of the viewer during said first display period and transmitting the second group of spectral components of said first perspective image to the left eye of the viewer during said second display period, while substantially blocking the transmission of the second and first spectral components of said second perspective image during the first and second display periods, respectively, and wherein said second electro-optical element comprises

second optically transparent input surface through which the first and second groups of spectral components can enter said second electro-optical element,

second optically transparent output surface through which the first and second groups of spectral components can exit said second electro-optical element, and

second spectral-component transmission means, disposed between the second optically transparent input and output surfaces of said second electro-optical element, for transmitting the second group of spectral components of said second perspective image to the right eye of the viewer during said first display period and transmitting the first group of spectral components of said second perspective image to the right eye of the viewer during said second display period, while substantially blocking the transmission of the first and second spectral components of said first perspective image during the first and second display periods, respectively.

4. The system of claim 3, wherein said first spectral-component transmission means comprises

a first polarizing filter panel for transmitting said first and second groups of spectral components while imparting said first polarization state P1 to said first group of spectral components, without imparting any particular polarization state to said second group of spectral components,

a second polarizing filter panel for transmitting said first and second groups of spectral components while imparting said second polarization state P2 to said second group of spectral components, without changing the polarization state of state of said first group of spectral components, and

controllable polarization state conversion means for preserving the first and second polarization states P1 and P2 of the first and second groups of spectral components in response to a first control signal provided to said controllable polarization conversion means during said first display period, and for converting the first polarization state P1 of said first group of spectral components to the second polarization state P2 and the second polarization state P2 of the second group of spectral components to the first polarization state P1 in response to a second control signal provided to said controllable polarization conversion means during said second display period.

5. The system of claim 4, wherein said second spectral-component transmission means of said second electro-optical element comprises

a first polarizing filter panel for transmitting said first and second groups of spectral components while imparting said first polarization state P1 to said first group of spectral components, without imparting any particular polarization state to said second group of spectral components,

a second polarizing filter panel for transmitting said first and second groups of spectral components while imparting said second polarization state P2 to said second group of spectral components, without changing the polarization state of state of said first group of spectral components, and

controllable polarization state conversion means for preserving the first and second polarization states P1 and P2 of the first and second groups of spectral components in response to a first control signal provided to said controllable polarization conversion means during said first display period, and for converting the first polarization state P1 of said first group of spectral components to the second polarization state P2 and the second polarization state P2 of the second group of spectral components to the first polarization state P1 in response to a second control signal provided to said controllable polarization conversion means during said second display period.

6. The system of claim 1, wherein said image display means comprises a liquid crystal light valve(LCLV) image projection panel, and wherein said electro-optical image processing apparatus comprises an electro-optical panel laminated to said LCLV image projection panel, and eyewear having a first polarized lens characterized by polarization state P1 and positionable in front of the left eye of the viewer and a second polarized lens characterized by polarization state P2 and positionable in front of the right eye of the viewer.

7. The system of claim 6, which further comprises a display controller for producing said first control signal during each said first display period, and for producing each said second control signal during each said second display period.

8. The system of claim 6, wherein both said first and second control signals are voltage signals.

9. The system of claim 6, wherein said electro-optical panel further comprises

an optically transparent input surface through which the first and second groups of spectral components can enter said electro-optical panel,

an optically transparent output surface through which the first and second groups of spectral components can exit said electro-optical panel,

first means, disposed between said optically transparent input and output surfaces, for imparting a first polarization state P1 to said first group of spectral components,

second means, disposed between said optically transparent input and output surfaces, for imparting a second polarization state P2 to said second group of spectral components, and

controllable polarization state conversion means, disposed between said optically transparent input and output surfaces, for converting the first polarization state P1 of said first group of spectral components to the second polarization state P2 and the second polarization state P2 of the second group of spectral components to the first polarization state P1 in response to a first control signal provided to said controllable polarization conversion means, and preserving the first and second polarization states P1 and P2 of the first and second groups of spectral components in response to a second control signal provided to said controllable polarization conversion means.

10. The system of claim 9, wherein said polarization state conversion means comprises a polarization state conversion panel, said image display panel, said first polarizing filter panel, said second polarizing filter panel and said controllable polarization state conversion panel are laminated together to form an integral unit of substantially planar geometry.

11. The system of claim 9, wherein said first means comprises a first polarizing filter panel for transmitting said first and second groups of spectral components while imparting said first polarization state P1 to said first group of spectral components, without imparting any particular polarization state to said second group of spectral components, and wherein said second means comprises a second polarizing filter panel for transmitting said first and second groups of spectral components while imparting said second polarization state P2 to said second group of spectral components, without changing the polarization state of state of said first group of spectral components.

12. The system of claim 10, wherein said polarization state conversion panel comprises a half-wave phase retardation panel.

13. The system of claim 10, wherein said integral unit has a maximal thickness dimension between said optically transparent input and output surfaces, and wherein said maximal thickness dimension is from about 1 to about 10 millimeters.

14. The system of claim 1, wherein said image display means comprises an image display panel, and wherein said electro-optical image processing apparatus comprises an electro-optical panel laminated to said image display panel, and eyewear having a first polarized lens characterized by polarization state P1 and positionable in front of the left eye of the viewer and a second polarized lens characterized by polarization state P2 and positionable in front of the right eye of the viewer.

15. The system of claim 14, wherein the first group of spectral components of said first and second perspective images include optical wavelengths associated with the perception of the colors red and blue, and wherein the second group of spectral components of said first and second perspective images include optical wavelengths associated with the perception of the color green.

16. The system of claim 14, wherein said electro-optical panel further comprises

an optically transparent input surface through which the first and second groups of spectral components can enter said electro-optical panel,

an optically transparent output surface through which the first and second groups of spectral components can exit said electro-optical panel,

first means, disposed between said optically transparent input and output surfaces, for imparting a first polarization state P1 to said first group of spectral components,

second means, disposed between said optically transparent input and output surfaces, for imparting a second polarization state P2 to said second group of spectral components, and

controllable polarization state conversion means, disposed between said optically transparent input and output surfaces, for converting the first polarization state P1 of said first group of spectral components to the second polarization state P2 and the second polarization state P2 of the second group of spectral components to the first polarization state P1 in response to a first control signal provided to said controllable polarization conversion means, and preserving the first and second polarization states P1 and P2 of the first and second groups of spectral components in response to a second control signal provided to said controllable polarization conversion means.

17. The system of claim 16, which further comprises a display controller for producing said first control signal during each said first display period, and for producing each said second control signal during each said second display period.

18. The system of claim 16, wherein both said first and second control signals are voltage signals.

19. The system of claim 16, wherein said first means comprises a first polarizing filter panel for transmitting said first and second groups of spectral components while imparting said first polarization state P1 to said first group of spectral components, without imparting any particular polarization state to said second group of spectral components, and wherein said second means comprises a second polarizing filter panel for transmitting said first and second groups of spectral components while imparting said second polarization state P2 to said second group of spectral components, without changing the polarization state of state of said first group of spectral components.

20. The system of claim 14, wherein said polarization state conversion panel comprises a half-wave phase retardation panel.

21. The system of claim 14, wherein said polarization state conversion means comprises a polarization state conversion panel, and wherein said image display panel, said first polarizing filter panel, said second polarizing filter panel and said controllable polarization state conversion panel are laminated together to form integral unit of substantially planar geometry.

22. The system of claim 21, wherein said integral unit has a maximal thickness dimension between said optically transparent input and output surfaces, and wherein said maximal thickness dimension is from about 1 to about 10 millimeters.