Color display devices and methods with enhanced attributes

• US 20050122294A1
• Filed: 02/02/2005
• Published: 06/09/2005
• Est. Priority Date: 04/11/2002
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Ben-Chorin, Moshe, Eliav, Dan, Ben-David, Ilan, Roth, Shmuel
• Granted Patent: US 9,953,590 B2
• Time in Patent Office: Days
• US Class Current: 345/87
• 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 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• 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
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/28 for enhancement of character form, e.g. smoothing
• CPC Class Codes: G09G 5/363 Graphics controllers

Abstract

A color display device for displaying an n-primary color image wherein n is greater than three, the device including an array of sub-pixel (801) configured to have at least one repeating unit having one sub-pixel representing each of the n primary colors, wherein repeating unit (906) is configured to optimize at least one of the n-primary color image.

Claims

1-36. -36. (canceled)

37. A color display device for displaying an n-primary color image, wherein n is greater than four, the device comprising an array of sub-pixels configured to have at least one repeating unit comprising one sub-pixel representing each of said n primary colors, wherein the repeating unit is configured to optimize at least one attribute of the n-primary color image.

38. A device according to claim 37 comprising a controller able to receive an input corresponding to said color image and to selectively activate at least some of said sub-pixels to produce one or more attenuation patterns corresponding to a gray-level representation of said color image.

39. A device according to claims 37, wherein said sub-pixels are arranged according to a hue order of said n primary colors.

40. A device according to claim 37, wherein said sub-pixels are arranged in sub-sets, each sub-set comprising neighboring sub-pixels, wherein each one of said sub-sets has a relatively neutral white-balance.

41. A device according to claim 40, wherein one or more of said sub-sets comprises three neighboring color sub-pixels.

42. A device according to claim 41, wherein said three neighboring color sub-pixels are located on one row or column.

43. A device according to claim 40, wherein one or more of said sub-sets comprises sub-pixels of five primary colors arranged in the order red, green, blue, yellow and cyan.

44. A device according to claim 40, wherein one or more of said sub-sets comprises two neighboring color sub-pixels.

45. A device according to claim 44, wherein said two neighboring color-sub-pixels are located on one row or column.

46. A device according to claim 38, wherein said controller is able to activate at least one of said sub-pixels in accordance with an adjusted coverage value.

47. A device according to claim 46, wherein said controller is able to determine said adjusted coverage value by applying a smoothing function to initial coverage values of a group of less than n different primary color sub-pixels containing the activated sub-pixel.

48. A device according to claim 47, wherein said group of sub-pixels comprises two sub-pixels neighboring said activated sub-pixel.

49. A device according to claim 48, wherein the two sub-pixels neighboring said activated sub-pixel are located on one row or column.

50. A device according to claims 46, wherein said controller is able to determine said adjusted coverage value by applying first and second smoothing functions to initial coverage values of first and second groups of sub-pixels, respectively, wherein each of said first and second groups of sub-pixels contains the activated sub-pixel and comprises less than n different primary color sub-pixels.

51. A device according to claim 50, wherein said first group comprises two sub-pixels in a single row or column including said activated sub-pixel.

52. A device according to claim 50, wherein said second group comprises at least one neighboring sub-pixel on the same column or row as said activated sub-pixel.

53. A device according to claims 37, wherein sub-pixels of said repeating unit are arranged in a one-dimensional array.

54. A device according to claims 37, wherein sub-pixels of said repeating unit are arranged in a two-dimensional array comprising a plurality of rows and columns.

55. A device according to claim 54 comprising six primary color sub-pixels arranged in first and second rows, said first row comprising color sub-pixels in the order red, green, blue, cyan, magenta and yellow, and said second row comprising color sub-pixels in the order cyan, magenta, yellow, red, green and blue.

56. A device according to claim 37, wherein said n primary colors comprise red, green, blue and yellow.

57. A device according to claim 37, wherein said n primary colors comprise at least five different primary colors.

58. A device according to claim 57, wherein said at least five different primary colors comprise red, green, blue, yellow and cyan.

59. A device according to claim 57, wherein said at least five different primary colors comprise at least six different primary colors.

60. A device according to claim 59, wherein said at least six different primary colors comprise red, green, blue, yellow, cyan and magenta.

61. A device according to claim 37, wherein said repeating unit comprises an arrangement of said sub-pixels that optimizes at least one property of said displayed image.

62. A device according to claim 61, wherein the arrangement of said sub-pixels is selected based on minimizing a harmonic of a transformation function applied to luminance values of a group of possible sub-pixel arrangements.

63. A device according to claim 62, wherein said transformation function comprises a Fourier Transform and wherein said harmonic comprises a first harmonic of said Fourier Transform.

64. A device according to claim 37, wherein said at least one attribute comprises a gray-level range of said repeating unit.

65. A device according to claim 37, wherein said at least one attribute comprises color saturation.

66. A device according to claim 37, wherein said at least one attribute comprises luminance uniformity.

67. A device according to claim 37, wherein said at least one attribute comprises image resolution.

68. A device according to claim 37, wherein said at least one attribute comprises a property related to a color fringes effect.

69. A device according to claim 37 comprising an n-primary color Liquid Crystal Display (LCD) device, wherein said array of sub-pixels comprises an array of sub-pixel filters, each sub-pixel filter transmitting light of one of said n primary colors.

70. A color display device for displaying an n-primary color image, wherein n is greater than three, the device comprising:

an array of sub-pixels configured to have at least one repeating unit comprising one sub-pixel representing each of said n primary colors, wherein the repeating unit is configured to optimize at least one attribute of the n-primary color image; and

a controller able to receive an input corresponding to said color image and to selectively activate at least some of said sub-pixels to produce one or more attenuation patterns corresponding to a gray-level representation of said color image.

71. A device according to claim 70, wherein said sub-pixels are arranged according to a hue order of said n primary colors.

72. A device according to claim 70, wherein said sub-pixels are arranged in sub-sets, each sub-set comprising at least two neighboring sub-pixels, wherein each one of said sub-sets has a relatively neutral white-balance.

73. A device according to claim 72, wherein said at least two neighboring sub-pixels are located on one row or column.

74. A device according to claim 70, wherein said controller is able to activate at least one of said sub-pixels in accordance with an adjusted coverage value.

75. A device according to claim 74, wherein said controller is able to determine said adjusted coverage value by applying a smoothing function to initial coverage values of a group of less than n different primary color sub-pixels containing the activated sub-pixel.

76. A device according to claim 75, wherein said group of sub-pixels comprises two sub-pixels neighboring said activated sub-pixel.

77. A device according to claims 74, wherein said controller is able to determine said adjusted coverage value by applying first and second smoothing functions to initial coverage values of first and second groups of sub-pixels, respectively, wherein each of said first and second groups of sub-pixels contains the activated sub-pixel and comprises less than n different primary color sub-pixels.

78. A device according to claim 77, wherein said first group comprises two sub-pixels in a single row or column including said activated sub-pixel.

79. A device according to claim 78, wherein said second group comprises at least one neighboring sub-pixel on the same column or row as said activated sub-pixel.

80. A device according to claim 70, wherein sub-pixels of said repeating unit are arranged in a one-dimensional array.

81. A device according to claim 70, wherein sub-pixels of said repeating unit are arranged in a two-dimensional array comprising a plurality of rows and columns.

82. A device according to claim 70, wherein said n primary colors comprise red, green, blue and yellow.

83. A device according to claim 70, wherein said repeating unit comprises an arrangement of said sub-pixels that optimizes at least one property of said displayed image.

84. A device according to claim 83, wherein the arrangement of said sub-pixels is selected based on minimizing a harmonic of a transformation function applied to luminance values of a group of possible sub-pixel arrangements

85. A device according to claim 84, wherein said transformation function comprises a Fourier Transform and wherein said harmonic comprises a first harmonic of said Fourier Transform.

86. A device according to claim 70, wherein said at least one attribute comprises a gray-level range of said repeating unit.

87. A device according to claim 70, wherein said at least one attribute comprises color saturation.

88. A device according to claim 70, wherein said at least one attribute comprises luminance uniformity.

89. A device according to claim 70, wherein said at least one attribute comprises image resolution.

90. A device according to claim 70, wherein said at least one attribute comprises a property related to a color fringes effect.

91. A device according to claim 70 comprising an n-primary color Liquid Crystal Display (LCD) device, wherein said array of sub-pixels comprises an array of sub-pixel filters, each sub-pixel filter transmitting light of one of said n primary colors.

92. A method of displaying a color image on a color display comprising an array of sub-pixels configured in a plurality of repeating units of at least one type, each repeating unit including a sub-pixel of each of n different primary colors, wherein n is greater than three, the method comprising producing a color combination by at least one of said repeating units without activating a sub-set of sub-pixels capable of producing substantially white light in the repeating unit producing said color combination.

93. A method of displaying a color image on a color display comprising an array of sub-pixels including a plurality of sub-pixels of each of n different primary colors, wherein n is greater than three, the method comprising:

activating at least one of said sub-pixels in accordance with an adjusted coverage value.

94. A method according to claim 93 comprising determining said adjusted coverage value by applying a smoothing function to initial coverage values of a group of less than n different primary color sub-pixels containing said activated sub-pixel.

95. A method according to claim 94 comprising determining said adjusted coverage value by applying first and second smoothing functions to initial coverage values of first and second groups of sub-pixels respectively, wherein each of said first and second groups contains the activated sub-pixel and comprises less than n different primary color sub-pixels.

96. A method according to claim 94 comprising determining one or more of said initial coverage values.