Color and polarization timeplexed stereoscopic display apparatus

• US 20080239068A1
• Filed: 04/02/2007
• Published: 10/02/2008
• Est. Priority Date: 04/02/2007
• Status: Abandoned Application

• Current Assignee: RealD Incorporated
• Original Assignee: Real D
• Inventors: Lipton, Lenny
• Application Number:
  US11/732,302
• Publication Number:
  US 20080239068A1
• Time in Patent Office: Days
• US Class Current: 348/60
• 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 9/3114 by using a sequential colour filter producing one colour at a time

Abstract

A device used in projecting stereoscopic images is provided. The device includes an illumination source configured to transmit light energy in multiple sections or segments, each section or segment having an optical attribute associated therewith, such as a color (red, green, blue). The illumination source may include light emitting diodes or light projected through a “color wheel,” and light energy is polarized by the illumination source. At least two adjacent sections of the have identical optical attributes, such as identical colors, and different perspective views associated therewith. Different polarization attributes or polarization axis orientations may be employed to facilitate stereoscopic image transmission using linear, circular, and achromatic circular polarization. Polarization and viewing of polarized light energy may be addressed by occlusion using eyewear.

Claims

1. A device configured to project stereoscopic images, comprising:

an illumination source configured to provide light energy in multiple sections, each section provided having an optical attribute associated therewith, wherein at least two adjacent sections of the illumination source provide light energy having identical optical attributes and different stereoscopic perspective views associated therewith;

wherein at least two adjacent sections are provided with different polarization attributes.

2. The device of claim 1, wherein the optical attribute comprises color.

3. The device of claim 1, wherein each section is polarized by the illumination source and has a polarization direction associated therewith, and polarization direction differs between at least two adjacent sections.

4. The device of claim 1, wherein each section is polarized by the illumination source and has a polarization orientation associated therewith, and polarization direction is similar for at least two adjacent sections.

5. The device of claim 2, wherein the illumination source comprises a rotating projection wheel having at least two adjacent red sections, at least two adjacent blue sections, and at least two adjacent green sections.

6. The device of claim 1, wherein said device is configured to be employed within a rear projection television device.

7. The device of claim 1, wherein the device is configured to be employed within a front projection screen arrangement.

8. The device of claim 1, wherein the illumination source comprises a rotating color wheel having multiple sections receiving light energy passing therethrough, and wherein each section of the rotating color wheel is polarized by a polarization filter attached to the section.

9. A polarized color wheel comprising:

a plurality of segments, each segment comprising;

a colored substantially transparent polarized element; and

a perspective view attribute associated with the colored substantially transparent element;

wherein at least two adjacent segments of the polarized color wheel share the same color but have different perspective view attributes, wherein the use of different perspective view attributes enables stereoscopic image viewing using the polarized color wheel.

10. The polarized color wheel of claim 9, wherein each segment further has a polarization attribute and a polarization direction associated therewith, and polarization direction differs between at least two adjacent segments.

11. The polarized color wheel of claim 9, wherein each segment has a polarization attribute and a polarization orientation associated therewith, and polarization direction is similar for at least two adjacent segments.

12. The polarized color wheel of claim 9, wherein the wheel comprises at least two adjacent red segments, at least two adjacent blue segments, and at least two adjacent green segments.

13. The polarized color wheel of claim 9, wherein said polarized color wheel is configured to be employed within a rear projection television device.

14. The polarized color wheel of claim 9, wherein the polarized color wheel is configured to be employed within a front projection screen arrangement.

15. The polarized color wheel of claim 9, wherein each segment of the polarized color wheel is polarized by a polarization filter adjacent to the segment.

16. A stereoscopic image projection device, comprising:

an illumination source configured to project light energy in multiple sections, each section having an optical attribute associated therewith, wherein at least two adjacent sections of the illumination source provide light energy having identical optical attributes but different perspective views;

an image engine positioned proximate the light source; and

a lens positioned proximate the image engine,

wherein the illumination source polarizes the light energy transmitted in a predetermined manner.

17. The stereoscopic image projection device of claim 16, wherein the light source comprises a plurality of light emitting diodes.

18. The stereoscopic image projection device of claim 16, wherein said stereoscopic image projection device is configured to be employed with at least one set of selection eyewear wearable by a user, said selection eyewear operational to occlude the user'"'"'s eyes and provide relatively clear images to the user.

19. The stereoscopic image projection device of claim 16, wherein the illumination source comprises a rotating projection wheel positioned between a light source and the image engine.

20. The stereoscopic image projection device of claim 16, wherein the optical attribute comprises color.

21. The stereoscopic image projection device of claim 16, wherein each section is polarized and has a polarization direction associated therewith.