Steady state surface mode device for stereoscopic projection

• US 20070206155A1
• Filed: 03/03/2006
• Published: 09/06/2007
• Est. Priority Date: 03/03/2006
• Status: Abandoned Application

• Current Assignee: RealD Incorporated
• Original Assignee: Real D
• Inventors: Lipton, Lenny
• Application Number:
  US11/367,617
• Publication Number:
  US 20070206155A1
• Time in Patent Office: Days
• US Class Current: 353/7
• CPC Class Codes: G03B 21/32 Details specially adapted for motion-picture projection with film moving continuously through the gate G03B41/02
• CPC Class Codes: G03B 35/26 using polarised or coloured light separating different viewpoint images
• CPC Class Codes: H04N 13/337 using polarisation multiplexing
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388

Abstract

A modulator and system used to display motion pictures is provided. The design comprises a sheet polarizer and a SMD electro-optical modulator configured to operate in a steady state (non-switching) mode. The modulator is formed from two substantially parallel relatively clear plates, such as glass, two coatings of a transparent conductor, such as indium tin oxide, located between the two substantially parallel relatively clear plates, two polyamide layers located between the two coatings of the transparent conductor, and a film of liquid crystal material located between the two polyamide layers.

Claims

1. An apparatus comprising:

a sheet polarizer; and

a surface mode device (SMD) electro-optical modulator configured to operate in a steady state mode;

wherein the sheet polarizer and SMD electro-optical modulator are configured to be employed with at least one selection device comprising an analyzer, and the SMD electro-optical modulator is tuned to a wavelength associated with the analyzer in the selection device.

2. The apparatus of claim 1, wherein the SMD electro-optical modulator comprises:

two substantially parallel relatively clear plates;

two coatings of a transparent conductor located between the two substantially parallel relatively clear plates;

two polyamide layers located between the two coatings of the transparent conductor; and

a film of liquid crystal material located between the two polyamide layers.

3. The apparatus of claim 1, wherein the apparatus is configured to be employed with a plurality of digital projectors configured to perform frame splitting.

4. The apparatus of claim 1, wherein the sheet polarizer and the SMD electro-optical modulator are oriented at a predetermined angle from one another, and wherein light energy transmitted to the sheet polarizer and SMD electro-optical modulator result in circularly polarized light energy being transmitted from the SMD electro-optical modulator.

5. The apparatus of claim 1, further comprising at least one optical device positioned proximate the sheet polarizer.

6. The apparatus of claim 5, wherein the optical device comprises a prism.

7. The apparatus of claim 5, wherein the optical device comprises a lens.

8. The apparatus of claim 1, wherein the selection device comprises a set of glasses wearable by the user in order to view a motion picture projected via the sheet polarizer and the SMD electro-optical modulator to a screen.

9. A projection system, comprising:

a surface mode device (SMD) configured to create circular polarized light using a sheet polarizer in combination therewith;

a projection screen comprising projection screen binder materials; and

selection device eyewear wearable by a user and comprising at least one analyzer usable to view images projected using the SMD onto the projection screen;

wherein the SMD is configured to operate in a steady state mode that enables tuning the SMD to substantially the wavelength of each analyzer, thereby correcting for phase shifting resulting from birefringence produced by the projection screen binder materials.

10. The projection system of claim 9, wherein the SMD comprises:

two substantially parallel relatively clear plates;

two coatings of a transparent conductor located between the two substantially parallel relatively clear plates

two polyamide layers located between the two coatings of the transparent conductor; and

a film of liquid crystal material located between the two polyamide layers.

11. The projection system of claim 10, wherein the transparent conductor comprises indium tin oxide.

12. The projection system of claim 10, wherein the polyamide layers are rubbed in the manufacturing process.

13. The projection system of claim 10, wherein the film of liquid crystal material comprises multiple dipoles that align themselves in an electric field.

14. A display system, comprising:

a plurality of projectors;

at least one sheet polarizer configured to receive light energy from at least one projector;

at least one modulator oriented at a predetermined angle to the sheet polarizer and operating at steady state and configured to receive projected images from at least one sheet polarizer and transmit circularly polarized light energy; and

a screen configured to receive circularly polarized light energy from the at least one modulator.

15. The display system of claim 14, further comprising at least one selection device comprising an analyzer, wherein the display system is tuned to a wavelength associated with the analyzer in the selection device.

16. The display system of claim 14, wherein the modulator comprises:

two substantially parallel relatively clear plates;

two coatings of a transparent conductor located between the two substantially parallel relatively clear plates;

two polyamide layers located between the two coatings of the transparent conductor; and

a film of liquid crystal material located between the two polyamide layers.

17. The display system of claim 14, wherein at least one projector comprises a digital projector configured to perform frame splitting.

18. The display system of claim 14, wherein the predetermined angle is approximately 45 degrees.

19. The display system of claim 14, further comprising at least one optical device positioned between at least one projector and at least one modulator.

20. The display system of claim 19, wherein the optical device comprises a prism.

21. The display system of claim 19, wherein the optical device comprises a lens.