Method and apparatus for high brightness wide color gamut display

• US 7,471,822 B2
• Filed: 07/24/2003
• Issued: 12/30/2008
• Est. Priority Date: 07/24/2002
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Genoa Color Technologies Limited (Samsung Electronics Co. Ltd.)
• Inventors: Roth, Shmuel, Ben-David, Ilan, Ben-Chorin, Moshe
• Primary Examiner(s): Do, Anh Hong
• Application Number:
  US10/491,726
• Publication Number:
  US 20040246389A1
• Time in Patent Office: 1,986 Days
• Field of Search: 382/162, 382/167, 382/191, 382/168, 345/88, 345/694, 345/589, 345/590, 345/593, 345/597, 345/32, 345/84, 348/743, 348/744, 348/E9.027, 353/84, 353/31, 359/497, 359/618, 358/500, 358/1.9, 358/512
• US Class Current: 382/162
• CPC Class Codes: H04N 9/3105 for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10

Abstract

A device to produce a color image, the device including a color filtering arrangement to sequentially produce at least four colors by transmission through respective color filters, each color filter having a spectral range of transmission, wherein the spectral range of at least one of the color filters includes substantially the entire spectral range of at least one additional color filter. A method of producing a color image, the method including sequentially transmitting light of at least four colors through at least four color filters respectively, each color filter having a spectral range of transmission, wherein the spectral range of at least one of the color filters includes substantially the entire spectral range of at least one additional color filter.

Claims

1. A display device to produce a color image, the device comprising a color filtering mechanism to sequentially produce light of at least four non-white colors by transmission through at least four non-white color filters respectively, each color filter having a spectral range of transmission in which substantially all light having a wavelength within said spectral range is transmitted, wherein the spectral range of at least one of said non-white color filters includes substantially the entire spectral range of at least one additional color filter of said color filters.

2. The device of claim 1 wherein said color filtering mechanism comprises a plurality of filter segments on a color wheel.

3. The display device of claim 1 wherein said at least four color filters comprise a blue color filter having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.

4. The display device of claim 1 wherein said at least four color filters comprise at least five color filters.

5. The display device of claim 4 wherein said at least five color filters comprise a blue color filter having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a cyan color filter having a spectral range from between 400 nm and 460 nm to between 500 nm and 560 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.

6. The display device of claim 4 wherein said at least five color filters comprise at least six color filters.

7. The display device of claim 6 wherein said at least six color filters have spectral ranges of approximately 400-500 nm, approximately 500-550 nm, approximately 575-750 nm, approximately 450-520 nm, approximately 520-620 nm, and approximately 620-750 nm, respectively.

8. The device of claim 1, further comprising a light source.

9. The device of claim 1, further comprising a spatial light modulator to produce said color image by modulating light filtered by said color filtering mechanism.

10. A device adapted to produce a color image using at least four non-white colors, the device comprising:

a reflection-transmission element to reflect an s-polarized component of received light and to transmit a p-polarized component of the received light;

a color filtering arrangement to separate said s-polarized and p-polarized components into at least four light beams corresponding to said at least four primary colors; and

at least four reflective LCD panels to modulate the polarization of said at least four light beams, respectively, to produce at least four modulated light beams corresponding to said color image,

wherein said color filtering arrangement comprises at least one color separation cube able to separate at least one of said s-polarized and p-polarized components into three or more of said at least four light beams.

11. The device of claim 10 wherein each of said primary colors has a spectral range, and wherein the spectral ranges of at least two of said colors overlap.

12. The device of claim 10 comprising a projection lens, wherein said reflection-transmission element further reflects s-polarized components of said modulated light beams and transmits p-polarized components of said modulated light beams onto said projection lens.

13. The device of claim 10 wherein said deflection-transmission element comprises a polarizing beam splitter.

14. The device of claim 11 wherein said at least four colors comprise a blue color having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a green color having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color having a spectral range from between 580 nm and 620 nm to 700 nm or more.

15. The device of claim 11 wherein said at least four colors comprise at least five colors.

16. The device of claim 15 wherein said at least five colors comprise a blue color having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a cyan color having a spectral range from between 400 nm and 460 nm to between 500 nm and 560 nm, a green color having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color having a spectral range from between 580 nm and 620 nm to 700 nm or more.

17. The device of claim 15, wherein said at least five colors comprise at least six colors.

18. The device of claim 17, wherein said at least six colors have spectral ranges of approximately 400-500 nm, approximately 500-550 nm, approximately 575-750 nm, approximately 450-520 nm, approximately 520-620 nm, and approximately 620-750 nm, respectively.

19. The device of claim 10, wherein said at least one color separation cube comprises a first color separation cube able to separate said s-polarized component into three light beams, and a second color separation cube able to separate the p-polarized component into three light beams.

20. A method of producing a color image, the method comprising sequentially transmitting light of at least four non-white colors corresponding to said color image through at least four non-white color filters respectively, each color filter having a spectral range of transmission in which substantially all light having a wavelength within said spectral range is transmitted, wherein the spectral range of at least one of said color filters includes substantially the entire spectral range of at least one additional color filter of said color filters.

21. The method of claim 20 wherein sequentially transmitting light of said colors comprises sequentially filtering light of an illumination unit.

22. The method of claim 20 wherein said at least four color filters comprise a blue color filter having a wavelength spectral range from about 400 nm to between 460 nm and 540 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.

23. The method of claim 20 wherein said at least four color filters comprise at least five color filters.

24. The method of claim 23 wherein said at least five color filters comprise a blue color filter having a wavelength spectra range from about 400 nm to between 460 nm and 540 nm, a cyan color filter having a spectral range from between 400 nm and 460 nm to between 500 nm and 560 nm, a green color filter having a spectral range from between 480 nm and 520 nm to between 540 nm and 580 nm, a yellow color filter having a spectral range from between 500 nm and 550 nm to 650 nm or more, and a red color filter having a spectral range from between 580 nm and 620 nm to 700 nm or more.

25. The method of claim 23 wherein said at least five color filters comprise at least six color filters.

26. The method of claim 25 wherein said at least six color filters have spectral ranges of approximately 400-500 nm, approximately 500-550 nm, approximately 575-750 nm, approximately 450-520 nm, approximately 520-620 nm, and approximately 620-750 nm, respectively.