Electronic display apparatus having adaptable color gamut

• US 20060279708A1
• Filed: 06/13/2005
• Published: 12/14/2006
• Est. Priority Date: 06/13/2005
• Status: Abandoned Application

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Silverstein, Barry D., Maier, Thomas O.
• Application Number:
  US11/150,996
• Publication Number:
  US 20060279708A1
• Time in Patent Office: Days
• US Class Current: 353/84
• CPC Class Codes: G03B 21/20 Lamp housings
• CPC Class Codes: G03B 27/545 for enlargers
• CPC Class Codes: G03B 33/08 Sequential recording or projection G03B33/02, G03B33/04, G03B33/06 take precedence
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20

Abstract

A method for adapting an electronic projection apparatus (10) to emulate the color gamut of a second display apparatus characterizes the color gamut (130) of the electronic projection apparatus (10) and the color gamut (130′) of the second display apparatus. At least one color filter (50) is placed in the electronic projection apparatus (10). The color filter (50) modifies the color gamut (130) of the electronic projection apparatus (10) and alters the spectral region for at least one primary color.

Claims

1. A method for adapting an electronic projection apparatus to emulate the color gamut of a second display apparatus comprising the steps of:

a) characterizing the color gamut of the electronic projection apparatus;

b) characterizing the color gamut of the second display apparatus;

c) inputting at least one color filter in the electronic projection apparatus; and

d) modifying the color gamut of the electronic projection apparatus with the color filter to alter the spectral region for at least one primary color.

2. The method according to claim 1 wherein at least one color filter in the electronic projection apparatus is a color wheel.

3. The method according to claim 1 where in the at least one color filter in the electronic projection apparatus resides in a removable filter housing.

4. The method according to claim 1 wherein the color filter is comprised of thin film dielectric layers.

5. The method according to claim 4 wherein the color filter is a rugate filter.

6. The method according to claim 1 wherein the area of the modified color gamut of the electronic projection apparatus is at least 1.05 times the area of the original color gamut of the electronic projection apparatus.

7. The method according to claim 1 further comprising the step of reading an encoding coupled to the at least one color filter to obtain information related to the filter.

8. The method according to claim 7 wherein the encoding is stored in a memory of a wireless communication device.

9. The method according to claim 7 wherein the encoding is a bar code.

10. The method according to claim 7 wherein the encoding stores a network address.

11. The method according to claim 10 further comprising the step of initiating a network connection with the electronic projection apparatus to obtain information about the at least one color filter.

12. The method according to claim 1 wherein the color filter truncates a portion of visible spectrum between blue and green wavelengths.

13. The method according to claim 1 wherein the color filter truncates a portion of visible spectrum between green and red wavelengths.

14. The method according to claim 1 wherein the color filter is a thin film dielectric stack.

15. An electronic projection apparatus comprising:

a) an interchangeable color filter for providing light to a spatial light modulator, wherein the color filter comprises an encoding identifying characteristics of the color filter;

b) a sensor for sensing the encoding; and

c) a control logic processor for controlling behavior of the spatial light modulator according to the encoding.

16. The electronic projection apparatus according to claim 15 wherein the encoding is a bar code.

17. The electronic projection apparatus according to claim 15 wherein the encoding is accessed by a wireless communication device.

18. The electronic projection apparatus according to claim 15 wherein the color filter is provided on a color filter wheel.

19. The electronic projection apparatus according to claim 15 wherein the interchangeable color filter is a rugate filter.

20. The electronic projection apparatus according to claim 15 wherein the interchangeable color filter is a thin film dielectric stack.

21. The electronic projection apparatus according to claim 18 wherein a repeating sequence of colors are sent to the spatial light modulator.

22. The electronic projection apparatus according to claim 15 wherein the characteristics of the color filter include spectral transmission of the color filter.

23. A replaceable color filter unit for an electronic projection apparatus comprising a color filter within a protective housing, whereby the color filter is disposed in the optical path of the electronic projection apparatus when the color filter unit is inserted into the electronic projection apparatus.

24. The replaceable color filter unit according to claim 23 further comprising an encoding that is read by a sensor within the electronic projection apparatus, in order to condition the behavior of a spatial light modulator.

25. The replaceable color filter unit according to claim 23 wherein the color filter is a rugate filter.

26. The replaceable color filter unit according to claim 23 wherein the color filter is a color filter wheel.

27. The replaceable color filter unit according to claim 23 wherein the color filter is a thin film dielectric stack.