Display device and color filter substrate

• US 7,760,177 B2
• Filed: 09/20/2006
• Issued: 07/20/2010
• Est. Priority Date: 09/21/2005
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nakamura, Kozo, Tomizawa, Kazunari
• Primary Examiner(s): Hjerpe; Richard
• Assistant Examiner(s): Shapiro; Leonid
• Application Number:
  US11/533,392
• Publication Number:
  US 20070063946A1
• Time in Patent Office: 1,399 Days
• Field of Search: 345/88, 345/55, 345/204
• US Class Current: 345/88
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127

Abstract

A display device includes a pixel defined by a plurality of subpixels. The plurality of subpixels include: first and second red subpixels for displaying red; a green subpixel for displaying green; a blue subpixel for displaying blue; and a yellow subpixel for displaying yellow.

Claims

1. An electronic display device comprising:

a pixel defined by a plurality of subpixels including first and second red subpixels, a green subpixel, and a yellow subpixel; and

a circuit arranged to drive the plurality of subpixels;

wherein

a total number of red subpixels in the pixel is greater than a total number of green subpixels in the pixel or a total number of yellow subpixels in the pixel; and

a total Y value of the first and second red subpixels is no less than 10% and no more than 22%, where a Y value in the XYZ color system of the pixel when displaying white is defined as 100%.

2. The electronic display device of claim 1, wherein, the green subpixel has a Y value of no less than 20% and no more than 35% and the yellow subpixel has a Y value of no less than 30% and no more than 50%.

3. The electronic display device of claim 1, wherein, the first and second red subpixels each have a dominant wavelength of no less than 605 nm and no more than 635 nm;

the green subpixel has a dominant wavelength of no less than 520 nm and no more than 550 nm; and

the yellow subpixel has a dominant wavelength of no less than 565 nm and no more than 580 nm.

4. The electronic display device of claim 1, wherein, the first and second red subpixels each have a color purity of no less than 90%;

the green subpixel has a color purity of no less than 65% and no more than 80%; and

the yellow subpixel has a color purity of no less than 85% and no more than 95%.

5. The electronic display device of claim 1, wherein the plurality of subpixels are of substantially the same size.

6. The electronic display device of claim 1, wherein the first and second red subpixels are driven independently of each other.

7. The electronic display device of claim 1, wherein the first and second red subpixels are driven by a same switching element.

8. The electronic display device of claim 1, wherein, within the pixel, the first red subpixel and the second red subpixel are disposed contiguous to each other.

9. The electronic display device of claim 1, wherein, within the pixel, the green subpixel and the yellow subpixel are disposed contiguous to each other and interposed between other subpixels.

10. The display electronic device of claim 1, wherein, within the pixel, the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel are disposed contiguous to one another.

11. The electronic display device of claim 1, wherein the plurality of subpixels further includes a cyan subpixel.

12. The electronic display device of claim 11, wherein the cyan subpixel has a Y value of no less than 10% and no more than 30%.

13. The electronic display device of claim 11, wherein the cyan subpixel has a dominant wavelength of no less than 475 nm and no more than 500 nm.

14. The electronic display device of claim 11, wherein the cyan subpixel has a color purity of no less than 65% and no more than 80%.

15. The electronic display device of claim 11, wherein, within the pixel, the cyan subpixel, and the green subpixel are disposed contiguous to one another.

16. The electronic display device of claim 1, which is a liquid crystal display device comprising a liquid crystal layer.

20. The electronic display device of claim 1, wherein, within the pixel, the green subpixel is interposed between other subpixels.

21. The electronic display device of claim 11, wherein, within the pixel, the cyan subpixel is interposed between other subpixels.

22. The electronic display device of claim 11, wherein, within the pixel, the green subpixel and the cyan subpixel are disposed contiguous to each other and interposed between other subpixels.

23. The electronic display device of claim 1, wherein, yellow displayed by the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel has a Y value of no less than 60% and no more than 85%.

24. The electronic display device of claim 1, wherein, red displayed by the first and second red subpixels has a dominant wavelength of no less than 605 nm and no more than 635 nm;

green displayed by the green subpixel has a dominant wavelength of no less than 520 nm and no more than 550 nm; and

yellow displayed by the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel has a dominant wavelength of no less than 565 nm and no more than 580 nm.

25. The electronic display device of claim 1, wherein, red displayed by the first and second red subpixels has a color purity of no less than 90%;

green displayed by the green subpixel has a color purity of no less than 65% and no more than 80%; and

yellow displayed by the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel has a color purity of no less than 85% and no more than 95%.

50. The electronic display device of claim 1, wherein the plurality of subpixels further includes a blue subpixel.

51. The electronic display device of claim 50, wherein the blue subpixel has a Y value of no less than 5% and no more than 10%.

52. The electronic display device of claim 50, wherein the blue subpixel has a dominant wavelength of no more than 470 nm.

53. The electronic display device of claim 50, wherein the blue subpixel has a color purity of no less than 90% and no more than 95%.

17. A color filter substrate for a display device comprising:

a substrate; and

a pixel defined by a plurality of color filters provided on the substrate and including first and second red color filters;

a green color filter; and

a yellow color filter;

wherein

a total number of red filters in the pixel is greater than a total number of green filters in the pixel or a total number of yellow filters in the pixel; and

a total Y value of red light transmitted from the first and second red filters is no less than 10% and no more than 22%, where a Y value in the XYZ color system of the pixel when displaying white is defined as 100%.

18. The color filter substrate of claim 17, wherein the plurality of color filters further include a cyan color filter.

19. The color filter substrate of claim 17, wherein the plurality of color filters further includes a blue color filter.

26. An electronic display device comprising:

a pixel defined by a plurality of subpixels including first and second red subpixels, a green subpixel, and a yellow subpixel; and

a circuit arranged to drive the plurality of subpixels;

wherein

a total area of red subpixels in the pixel is greater than a total area of green subpixels in the pixel or a total area of yellow subpixels in the pixel; and

a total Y value of the first and second red subpixels is no less than 10% and no more than 22%, where a Y value in the XYZ color system of the pixel when displaying white is defined as 100%.

27. The electronic display device of claim 26, wherein, the green subpixel has a Y value of no less than 20% and no more than 35% and the yellow subpixel has a Y value of no less than 30% and no more than 50%.

28. The electronic display device of claim 26, wherein, the first and second red subpixels each have a dominant wavelength of no less than 605 nm and no more than 635 nm;

the green subpixel has a dominant wavelength of no less than 520 nm and no more than 550 nm; and

the yellow subpixel has a dominant wavelength of no less than 565 nm and no more than 580 nm.

29. The electronic display device of claim 26, wherein, the first and second red subpixels each have a color purity of no less than 90%;

the green subpixel has a color purity of no less than 65% and no more than 80%; and

the yellow subpixel has a color purity of no less than 85% and no more than 95%.

30. The electronic display device of claim 26, wherein the plurality of subpixels are of substantially the same size.

31. The electronic display device of claim 26, wherein the first and second red subpixels are driven independently of each other.

32. The electronic display device of claim 26, wherein the first and second red subpixels are driven by a same switching element.

33. The electronic display device of claim 26, wherein, within the pixel, the first red subpixel and the second red subpixel are disposed contiguous to each other.

34. The electronic display device of claim 26, wherein, within the pixel, the green subpixel and the yellow subpixel are disposed contiguous to each other and interposed between other subpixels.

35. The electronic display device of claim 26, wherein, within the pixel, the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel are disposed contiguous to one another.

36. The electronic display device of claim 26, wherein the plurality of subpixels further includes a cyan subpixel.

37. The electronic display device of claim 36, wherein the cyan subpixel has a Y value of no less than 10% and no more than 30%.

38. The electronic display device of claim 36, wherein the cyan subpixel has a dominant wavelength of no less than 475 nm and no more than 500 nm.

39. The electronic display device of claim 36, wherein the cyan subpixel has a color purity of no less than 65% and no more than 80%.

40. The electronic display device of claim 36, wherein, within the pixel, the cyan subpixel and the green subpixel are disposed contiguous to one another.

41. The electronic display device of claim 26, which is a liquid crystal display device comprising a liquid crystal layer.

44. The electronic display device of claim 26, wherein, within the pixel, the green subpixel is interposed between other subpixels.

45. The electronic display device of claim 36, wherein, within the pixel, the cyan subpixel is interposed between other subpixels.

46. The electronic display device of claim 36, wherein, within the pixel, the green subpixel and the cyan subpixel are disposed contiguous to each other and interposed between other subpixels.

47. The electronic display device of claim 26, wherein, yellow displayed by the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel has a Y value of no less than 60% and no more than 85%.

48. The electronic display device of claim 26, wherein, red displayed by the first and second red subpixels has a dominant wavelength of no less than 605 nm and no more than 635 nm;

green displayed by the green subpixel has a dominant wavelength of no less than 520 nm and no more than 550 nm; and

yellow displayed by the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel has a dominant wavelength of no less than 565 nm and no more than 580 nm.

49. The electronic display device of claim 26, wherein, red displayed by the first and second red subpixels has a color purity of no less than 90%;

green displayed by the green subpixel has a color purity of no less than 65% and no more than 80%; and

yellow displayed by the first red subpixel, the second red subpixel, the green subpixel, and the yellow subpixel has a color purity of no less than 85% and no more than 95%.

54. The electronic display device of claim 26, wherein the plurality of subpixels further includes a blue subpixel.

55. The electronic display device of claim 26, wherein the blue subpixel has a Y value of no less than 5% and no more than 10%.

56. The electronic display device of claim 26, wherein the blue subpixel has a dominant wavelength of no more than 470 nm.

57. The electronic display device of claim 26, wherein the blue subpixel has a color purity of no less than 90% and no more than 95%.

42. A color filter substrate for a display device comprising:

a substrate; and

a pixel defined by a plurality of color filters provided on the substrate and including first and second red color filters;

a green color filter; and

a yellow color filter;

wherein

a total area of red filters in the pixel is greater than a total area of green filters in the pixel or a total area of yellow filters in the pixel; and

a total Y value of red light transmitted from the first and second red filters is no less than 10% and no more than 22%, where a Y value in the XYZ color system of the pixel when displaying white is defined as 100%.

43. The color filter substrate of claim 42, wherein the plurality of color filters further include a cyan color filter for allowing cyan light to be transmitted therethrough.

58. The color filter substrate of claim 42, wherein the plurality of color filters further includes a blue color filter.