Polarization preserving projection screen with engineered pigment and method for making same

• US 9,110,363 B2
• Filed: 07/15/2013
• Issued: 08/18/2015
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: RealD Incorporated
• Original Assignee: RealD Incorporated
• Inventors: Petersen, Joel, Rich, Christopher, Lewandowski, Raymond Jacob, Sharp, Gary D., Coleman, David
• Primary Examiner(s): LaBalle, Clayton E
• Assistant Examiner(s): BUTLER, KEVIN C
• Application Number:
  US13/942,259
• Publication Number:
  US 20130301122A1
• Time in Patent Office: 764 Days
• Field of Search: 117/22, 359/443, 359/452, 427/194, 428/148, 430/321, 502/178
• US Class Current: 1/1
• CPC Class Codes: G03B 21/56 Projection screens
• CPC Class Codes: G03B 21/60 characterised by the nature of the surface
• CPC Class Codes: G03B 21/602 Lenticular screens G03B21/625 takes precedence
• CPC Class Codes: G03B 21/604 Polarised screens
• CPC Class Codes: G03B 21/62 Translucent screens
• CPC Class Codes: G03B 21/625 Lenticular translucent screens

Abstract

Polarization preserving projection screens provide optimum polarization preservation for 3D viewing. The projection screens additionally provide improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed method for providing a projection screen comprises stripping an optically functional material from a carrier substrate, thus creating engineered particles from the optically functional material. The engineered particles may then be deposited on a second substrate to create a substantially homogeneous optical appearance of the projection screen.

Claims

1. A web shuffling method for providing a projection screen, the method comprising:

distributing optical layers onto a carrier substrate to form an optically engineered material; and

generating individual engineered particles by stripping the optical layers from the carrier substrate, wherein the individual engineered particles are operable to create a substantially homogeneous appearance upon distribution onto a second substrate.

2. The web shuffling method of claim 1, further comprising combining the individual engineered particles with a carrier compound further comprising a transparent binder resin.

3. The web shuffling method of claim 2, wherein the transparent binder resin may be one of PVC resin, enamel, polyurethane, acrylic, or lacquer.

4. The web shuffling method of claim 1, wherein stripping the optical layers further comprises sacrificing the carrier substrate.

5. The web shuffling method of claim 1, further comprising verifying that the individual engineered particles are within a predetermined size range.

6. The web shuffling method of claim 5, wherein verifying the individual engineered particles are within a predetermined size range further comprises resizing the individual engineered particles if the individual engineered particles are outside the predetermined size range.

7. A web shuffling method for providing a projection screen, the method comprising:

depositing optical layers onto a carrier substrate, thereby creating an optically engineered material; and

removing the optical layers from the carrier substrate, thereby creating individual optically engineered particles operable to create a predetermined optical appearance upon distribution onto a surface.

8. The web shuffling method of claim 7, wherein depositing optical layers onto a carrier substrate further comprises depositing at least a first optical coating.

9. The web shuffling method of claim 8, wherein the at least first optical coating is adjacent to the diffuser prior to stripping the optically functional material from the carrier substrate.

10. The web shuffling method of claim 8, wherein depositing optical layers onto a carrier substrate further comprises depositing at least a second optical coating.

11. The web shuffling method of claim 10, wherein depositing at least the second optical coating further comprises depositing a dielectric coating.

12. The web shuffling method of claim 10, wherein the second optical coating is adjacent to the diffuser prior to stripping the optically functional material from the carrier substrate.

13. The web shuffling method of claim 10, further comprising depositing a reflective layer.

14. The web shuffling method of claim 13, wherein depositing a reflective layer further comprises depositing a reflective layer substantially composed of aluminum.

15. The web shuffling method of claim 13, wherein depositing optical layers further comprises depositing a third optical coating adjacent to the reflective layer.

16. The web shuffling method of claim 15, wherein depositing the third optical coating further comprises depositing a dielectric coating.

17. The web shuffling method of claim 8, wherein depositing at least a first optical coating further comprises depositing a release layer.

18. The web shuffling method of claim 7, further comprise creating a sandwich structure with the engineered particles, wherein the sandwich structure includes a plurality of optical coatings on at least a first side of a reflective layer.

19. The web shuffling method of claim 7, further comprising verifying that the engineered particles are within a predetermined size range.

20. The web shuffling method of claim 19, further comprising resizing the engineered particles if the engineered particles are outside the predetermined size range.