DISPLAY DEVICE AND SIGNAL CONVERTING DEVICE

• US 20100026728A1
• Filed: 10/12/2007
• Published: 02/04/2010
• Est. Priority Date: 10/13/2006
• Status: Active Grant

• 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, Ueki, Shun, Miyazaki, Akiko
• Granted Patent: US 9,928,786 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• 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 2340/0457 Improvement of perceived resolution by subpixel rendering
• 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 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general

Abstract

A display device includes a multi-primary-color display panel with subpixels arranged in a matrix pattern of columns and rows; and a signal converter arranged to convert a video signal, having values that represent the colors of pixels with a matrix pattern, into a multi-primary-color signal for use in the multi-primary-color display panel. The signal converter associates a value of the video signal representing the color of at least one of pixels on a p^th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on (s−1)^th and s^th rows, and also associates a value of the video signal representing the color of at least one of the pixels on a (p+1)^th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on s^th and (s+1)^th rows.

Claims

1-27. -27. (canceled)

28. :

A display device comprising;

a multi-primary-color display panel including multiple subpixels that are arranged in a matrix pattern of columns and rows, wherein if a series of L columns of subpixels, where L is a natural number that is equal to or greater than two, multiple sets of subpixels in first and second different combinations, each set including L subpixels that are arranged in the row direction, are arranged alternately; and

a signal converter arranged to convert a video signal, having values that represent the colors of pixels with a matrix pattern, into a multi-primary-color signal for use in the multi-primary-color display panel;

wherein

the signal converter is arranged to associate a value of the video signal representing the color of at least one of the pixels on a pth row with values of the multi-primary-color signal corresponding to the luminances of subpixels on (s−

1)^th and s^th rows, and also associates a value of the video signal representing the color of at least one of the pixels on a (p+1)^th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on s^th and (s+1)^th rows.

29. :

The display device of claim 28, wherein the multi-primary-color display panel has a different vertical resolution from the video signal, and the signal converter is arranged to perform multi-primary-color conversion and vertical resolution conversion on the values of the video signal representing the colors of the pixels such that the values are adapted to the multi-primary-color display panel.

30. :

The display device of claim 29, wherein the video signal has a vertical resolution of 2M that is equal to the number of the rows of pixels, the multi-primary-color display panel has M sets of subpixels in the first combination and M sets of subpixels in the second combination that are arranged alternately in the column direction and also has a nominal vertical resolution of M, and the signal converter is arranged to convert the video signal with the vertical resolution of 2M into a multi-primary-color signal for use in the multi-primary-color display panel with the nominal vertical resolution of M.

31. :

The display device of claim 28, wherein on a certain column of subpixels belonging to the multiple subpixels of the multi-primary-color display panel, one of the L subpixels included in a set of subpixels in the first combination and one of the L subpixels included in a set of subpixels in the second combination are arranged alternately in the column direction.

32. :

The display device of claim 28, wherein on a certain row of subpixels belonging to the multiple subpixels of the multi-primary-color display panel, a set of subpixels in either the first or second combination is arranged in the row direction.

33. :

The display device of claim 32, wherein on a certain row of subpixels belonging to the multiple subpixels of the multi-primary-color display panel, the L subpixels, each of which belongs to a set of subpixels in either the first or second combination, are arranged periodically in the row direction.

34. :

The display device of claim 32, wherein the video signal has a horizontal resolution of 2H corresponding with the number of columns of pixels, on a certain row of subpixels belonging to the multiple subpixels of the multi-primary-color display panel, a set of 2H subpixels in either the first or second combination is arranged in the row direction, and a value of the video signal representing the colors of a column of pixels is associated with values of the multi-primary-color signal corresponding to the luminances of the L columns of subpixels.

35. :

The display device of claim 34, wherein a value of the video signal representing the color of a pixel at an intersection between a pth row and a qth column is associated with values of the multi-primary-color signal corresponding to the luminances of a series of L subpixels on an (s−

1)^th row, including one at an intersection between the (s−

1)^th row and a t^th column, and another series of L subpixels on an s^th row, including one at an intersection between the s^th row and the t^th column.

36. :

The display device of claim 35, wherein the value of the video signal representing the color of the pixel at the intersection between the p^th row and the q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of subpixels on (p−

1)^th and p^th rows and on {L×

(q−

1)+1}^th through (L×

q)^th columns, and wherein a value of the video signal representing the color of a pixel at an intersection between the (p+1)^th row and the q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of subpixels on the p^th and (p+1)^th rows and on the {L×

(q−

1)+1}^th through (L×

q)^th columns.

37. :

The display device of claim 28, wherein at least one of subpixels included in each said set of subpixels in the first combination displays the same color as at least one of subpixels included in each said set of subpixels in the second combination.

38. :

The display device of claim 37, wherein L is equal to 3, each said set of subpixels in the first combination includes a first red subpixel, a yellow subpixel and a blue subpixel, and each said set of subpixels in the second combination includes a second red subpixel, a green subpixel and a cyan subpixel.

39. :

The display device of claim 32, wherein the video signal has a horizontal resolution of 2H corresponding with the number 2H of columns of pixels, on a certain row of subpixels belonging to the multiple subpixels of the multi-primary-color display panel, a set of H subpixels in either the first or second combination is arranged in the row direction, the multi-primary-color display panel has a nominal horizontal resolution of H, and the signal converter is arranged to convert the video signal with the horizontal resolution of 2H into a multi-primary-color signal for use in the multi-primary-color display panel with the nominal horizontal resolution of H.

40. :

The display device of claim 39, wherein a value of the video signal representing the color of a pixel at an intersection between a p^th row and a q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of subpixels on an (s−

1)^th row, including a one at an intersection between the (s−

1)^th row and a t^th column, and subpixels on an s^th row, including a one at an intersection between the s^th row and the t^th column, and a value of the video signal representing the color of a pixel at an intersection between a (p+1)^th row and the q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of subpixels on the s^th row, including a one at an intersection between the s^th row and the t^th column, and subpixels on an (S+1)^th row, including a one at an intersection between the (s+1)^th row and the t^th column.

41. :

The display device of claim 39, wherein a value of the video signal representing the color of a pixel at an intersection between a p^th row and a q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of a series of L subpixels on an (s−

1)^th row and another series of L subpixels on an s^th row, and a value of the video signal representing the color of a pixel at an intersection between a (p+1)^th row and the q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of the series of L subpixels on the s^th row and another series of L subpixels on an (s+1)^th row.

42. :

The display device of claim 39, wherein a value of the video signal representing the color of a pixel at an intersection between a p^th row and a q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of less than L subpixels on an (s−

1)^th row and less than L subpixels on an s^th row, and a value of the video signal representing the color of a pixel at an intersection between a (p+1)^th row and the q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of the less than L subpixels on the s^th row and less than L subpixels on an (s+1)^th row.

43. :

The display device of claim 39, wherein a value of the video signal representing the color of a pixel at an intersection between a p^th row and a q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of more than L subpixels on an (s−

1)^th row and more than L subpixels on an s^th row, and a value of the video signal representing the color of a pixel at an intersection between a (p+1)^th row and the q^th column is associated with values of the multi-primary-color signal corresponding to the luminances of the more than L subpixels on the s^th row and more than L subpixels on an (s+1)^th row.

44. :

The display device of claim 28, wherein the subpixels included in each said set of subpixels in the first combination represent a different color from the subpixels included in each said set of subpixels in the second combination.

45. :

The display device of claim 44, wherein L is equal to 2, each said set of subpixels in the first combination includes a red subpixel and a yellow subpixel, and each said set of subpixels in the second combination includes a green subpixel and a blue subpixel.

46. :

The display device of claim 28, wherein the video signal is an interlaced signal, in odd-numbered fields, (s−

1)^th and s^th rows of subpixels of the multi-primary-color display panel have luminances that are associated with values of the video signal representing the colors of pixels on a p^th row, in even-numbered fields, the s^th and (s+1)^th rows of subpixels of the multi-primary-color display panel have luminances that are associated with values of the video signal representing the colors of pixels on a (p+1)^th row.

47. :

The display device of claim 46, wherein in each of the odd-numbered and even-numbered fields, (2w−

1)^th and 2w^th rows of subpixels have the same polarity but 2w^th and (2w+1)^th rows of subpixels have mutually different polarities, and in each of the odd-numbered and even-numbered fields, subpixels that are adjacent to each other in the row direction have mutually different polarities.

48. :

The display device of claim 46, wherein each of the multiple subpixels of the multi-primary-color display panel has its polarity inverted every field.

49. :

The display device of claim 28, wherein the video signal is a progressive signal, and the s^th row of subpixels of the multi-primary-color display panel exhibit luminances that have been obtained based on values of the video signal representing the colors of pixels on p^th and (p+1)^th rows.

50. :

The display device of claim 49, wherein the signal converter is arranged to determine the values of the multi-primary-color signal corresponding to the luminances of the s^th row of subpixels based on a result of a multi-primary-color conversion that has been performed on the values of the video signal representing the colors of the pixels on the p^th and (p+1)^th rows.

51. :

The display device of claim 50, wherein at least one of the subpixels included in each said set of subpixels in the first combination displays the same color as at least one of the subpixels included in each said set of subpixels in the second combination, and the signal converter is arranged to determine a value corresponding to the luminance of that subpixel that displays the same color among subpixels on an x^th row based on a result of a multi-primary-color conversion that has been performed on a value of the video signal representing the colors of pixels on the x^th row.

52. :

The display device of claim 51, wherein the signal converter is arranged to obtain a value representing the colors of a single row of pixels, comprised of two rows of subpixels in the multi-primary-color display panel, based on values of the video signal representing the colors of at least two rows of pixels that are adjacent to each other in the column direction, and to subject the value representing the colors of the single row of pixels to a multi-primary-color conversion, thereby determining the values of the multi-primary-color signal corresponding to the luminances of the two rows of subpixels.

53. :

The display device of claim 52, wherein the signal converter is arranged to obtain a value representing the colors of a single row of pixels, comprised of (2w−

1)^th and 2w^th rows of subpixels in the multi-primary-color display panel, based on values of the video signal representing the colors of (2w−

2)^th, (2w−

1)^th and 2w^th rows of pixels, and to subject the value representing the colors of the single row of pixels to a multi-primary-color conversion, thereby determining the values of the multi-primary-color signal corresponding to the luminances of the (2w−

1)^th and 2w^th rows of subpixels.

54. :

A signal converter for generating a multi-primary-color signal for use in a multi-primary-color display panel including multiple subpixels that are arranged in a matrix pattern of columns and rows, based on a video signal having values representing colors of pixels that are arranged in a matrix pattern, wherein if a series of L columns of subpixels are viewed in the column direction, multiple sets of subpixels in first and second different combinations, each set including L subpixels that are arranged in the row direction, are arranged alternately, wherein the signal converter is arranged to associate a value of the video signal representing the color of at least one of the pixels on a p^th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on (s−

1)^th and s^th rows, and to associate a value of the video signal representing the color of at least one of the pixels on a (p+1)^th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on s^th and (s+1)^th rows.