US7042527B2
Expired / Lapsed
US
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Field sequential display of color video picture with color breakup prevention
Assignee: Vista Peak Ventures LLC
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Filing: 2001-08-30
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Granted: 2006-05-09
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Expires: 2021-08-30
Abstract
Abstract A method of displaying a color video picture according to a field sequential process is provided. A display device displays an image comprising a matrix of pixels. One frame image is composed of four field images ranging from a first field image to a fourth field image. With four adjacent pixels handled as one unit, the colors R, G, B, W of illuminating lights applied to the pixels in each unit are different from each other, and the arrangement of the colors is successively switched or changed in each field period. Information representing the colors R, G, B, W separated from a video signal is displayed sequentially in successive fields at positions corresponding to the colors of the illuminating lights applied to the pixels and times at which the illuminating lights are applied to the pixels.
Inventors
- 👤 Masao Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:38
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3111; H04N9/3114; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3406; G09G3/3413; G09G2310/00; G09G2310/02; G09G2310/0235; H04N5/00; H04N5/74; H04N5/7416; H04N5/7441
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
166 words
A method of displaying a color video picture by sequentially displaying color images on a display device and switching illumination light colors depending on the displayed color images according to a field sequential process, said method comprising the steps of: illuminating a display device having a matrix of pixels, with adjacent four pixels as a unit, with illuminating lights including a red illuminating light, a green illuminating light, a blue illuminating light, and an achromatic illuminating light, such that the illuminating lights applied to the pixels in each unit have different colors from each other and the colors of the illuminating lights are switched in each field period; generating a red video signal, a green video signal, a blue video signal, and an achromatic video signal from a color video signal so as to correspond to the colors of the illuminating lights applied to the pixels in each unit; and energizing said display device with the generated video signals to display a color video picture thereon.
Claim 2
Independent Claim
166 words
A method of displaying a color video picture by sequentially displaying color images on a display device and switching illumination light colors depending on the displayed color images according to a field sequential process, said method comprising the steps of: illuminating a display device having a matrix of pixels, with adjacent four pixels as a unit, with illuminating lights including a red illuminating light, a green illuminating light, a blue illuminating light, and an achromatic illuminating light, such that the illuminating lights applied to the pixels in each unit have different colors from each other and the colors of the illuminating lights are switched in each field period; generating a red video signal, a green video signal, a blue video signal, and an achromatic video signal from a color video signal so as to correspond to the colors of the illuminating lights applied to the pixels in each unit; and energizing said display device with the generated video signals to display a color video picture thereon.
Claim 3
Dependent Claim
22 words
A method according to claim 1 , further comprising the step of: projecting the color video picture displayed on said display device.
Claim 4
Dependent Claim
32 words
A method according to claim 1 , wherein the pixels in each unit are arranged in a square matrix with green and achromatic pixels positioned diagonally opposite in relation to each other.
Claim 5
Dependent Claim
32 words
A method according to claim 2 , wherein the pixels in each unit are arranged in a square matrix with green and achromatic pixels positioned diagonally opposite in relation to each other.
Claim 6
Independent Claim
177 words
An apparatus for displaying a color video picture by sequentially displaying color images on a display device and switching illumination light colors depending on the displayed color images according to a field sequential process, said apparatus comprising: a display device having a matrix of pixels; color switching illumination means for illuminating said display device, with adjacent four pixels as a unit, with illuminating lights including a red illuminating light, a green illuminating light, a blue illuminating light, and an achromatic illuminating light, such that the illuminating lights applied to the pixels in each unit have different colors from each other and the colors of the illuminating lights are switched in each field period; and video signal processing means for generating a red video signal, a green video signal, a blue video signal, and an achromatic video signal from a color video signal so as to correspond to the colors of the illuminating lights applied to the pixels in each unit, and energizing said display device with the generated video signals to display a color video picture thereon.
Claim 7
Independent Claim
177 words
An apparatus for displaying a color video picture by sequentially displaying color images on a display device and switching illumination light colors depending on the displayed color images according to a field sequential process, said apparatus comprising: a display device having a matrix of pixels; color switching illumination means for illuminating said display device, with adjacent four pixels as a unit, with illuminating lights including a red illuminating light, a green illuminating light, a blue illuminating light, and an achromatic illuminating light, such that the illuminating lights applied to the pixels in each unit have different colors from each other and the colors of the illuminating lights are switched in each field period; and video signal processing means for generating a red video signal, a green video signal, a blue video signal, and an achromatic video signal from a color video signal so as to correspond to the colors of the illuminating lights applied to the pixels in each unit, and energizing said display device with the generated video signals to display a color video picture thereon.
Claim 8
Dependent Claim
25 words
An apparatus according to claim 5 , further comprising the step of: projecting means for projecting the color video picture displayed on said display device.
Claim 9
Dependent Claim
63 words
An apparatus according to claim 5 , wherein said color switching illumination means comprises four regions for emitting said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light to each pixel of said display device, with only one at a time of said four regions being energizable to emit the illuminating light in each field period.
Claim 10
Dependent Claim
63 words
An apparatus according to claim 6 , wherein said color switching illumination means comprises four regions for emitting said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light to each pixel of said display device, with only one at a time of said four regions being energizable to emit the illuminating light in each field period.
Claim 11
Dependent Claim
59 words
An apparatus according to claim 5 , wherein said color switching illumination means comprises a region for emitting either one of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light to each pixel of said display device, with the color of said one illuminating light being switchable in each field period.
Claim 12
Dependent Claim
59 words
An apparatus according to claim 6 , wherein said color switching illumination means comprises a region for emitting either one of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light to each pixel of said display device, with the color of said one illuminating light being switchable in each field period.
Claim 13
Dependent Claim
70 words
An apparatus according to claim 5 , wherein said color switching illumination means comprises a region for emitting either one of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light to each pixel of said display device, and means for moving the relative position of said region and said display device by a distance corresponding to one pixel in each filed period.
Claim 14
Dependent Claim
70 words
An apparatus according to claim 6 , wherein said color switching illumination means comprises a region for emitting either one of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light to each pixel of said display device, and means for moving the relative position of said region and said display device by a distance corresponding to one pixel in each field period.
Claim 15
Independent Claim
212 words
An apparatus for displaying a color video picture by sequentially displaying color images on a display device and switching illumination light colors depending on the displayed color images according to a field sequential process, said apparatus comprising: a display device having a matrix of pixels and a condensing lens disposed on a surface thereof for applying illuminating light in association with every four pixels of said matrix; color switching illumination means for applying illuminating lights including a red illuminating light, a green illuminating light, a blue illuminating light, and an achromatic illuminating light at different angles to said condensing lens, switching the colors of the illuminating lights in each field period, such that, with adjacent four pixels as a unit, the illuminating lights applied to the pixels in each unit have different colors from each other, and switching the colors of the illuminating lights in each field period; and video signal processing means for generating a red video signal, a green video signal, a blue video signal, and an achromatic video signal from a color video signal so as to correspond to the colors of the illuminating lights applied to the pixels in each unit, and energizing said display device with the generated video signals to display a color video picture thereon.
Claim 16
Independent Claim
212 words
An apparatus for displaying a color video picture by sequentially displaying color images on a display device and switching illumination light colors depending on the displayed color images according to a field sequential process, said apparatus comprising: a display device having a matrix of pixels and a condensing lens disposed on a surface thereof for applying illuminating light in association with every four pixels of said matrix; color switching illumination means for applying illuminating lights including a red illuminating light, a green illuminating light, a blue illuminating light, and an achromatic illuminating light at different angles to said condensing lens, switching the colors of the illuminating lights in each field period, such that, with adjacent four pixels as a unit, the illuminating lights applied to the pixels in each unit have different colors from each other, and switching the colors of the illuminating lights in each field period; and video signal processing means for generating a red video signal, a green video signal, a blue video signal, and an achromatic video signal from a color video signal so as to correspond to the colors of the illuminating lights applied to the pixels in each unit, and energizing said display device with the generated video signals to display a color video picture thereon.
Claim 17
Dependent Claim
25 words
An apparatus according to claim 13 , further comprising the step of: projecting means for projecting the color video picture displayed on said display device.
Claim 18
Dependent Claim
71 words
An apparatus according to claim 13 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, respectively, said color switching illumination means being arranged to energize either one at a time of said four regions to emit the illuminating light in each field period.
Claim 19
Dependent Claim
71 words
An apparatus according to claim 14 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, respectively, said color switching illumination means being arranged to energize either one at a time of said four regions to emit the illuminating light in each field period.
Claim 20
Dependent Claim
78 words
An apparatus according to claim 13 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, respectively, said color switching illumination means being arranged to energize either one at a time of said four regions to emit the illuminating light in each field period, said regions being arranged in a matrix.
Claim 21
Dependent Claim
78 words
An apparatus according to claim 14 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, respectively, said color switching illumination means being arranged to energize either one at a time of said four regions to emit the illuminating light in each field period, said regions being arranged in a matrix.
Claim 22
Dependent Claim
65 words
An apparatus according to claim 13 , wherein said color switching illumination means has a collimator lens associated with four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said color switching illumination means being arranged to switch the colors of the illuminating lights in each field period.
Claim 23
Dependent Claim
68 words
An apparatus according to claim 14 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said color switching illumination means being arranged to switch the colors of the illuminating lights in each field period.
Claim 24
Dependent Claim
75 words
An apparatus according to claim 13 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said color switching illumination means being arranged to switch the colors of the illuminating lights in each field period, said regions being arranged in a matrix.
Claim 25
Dependent Claim
75 words
An apparatus according to claim 14 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said color switching illumination means being arranged to switch the colors of the illuminating lights in each field period, said regions being arranged in a matrix.
Claim 26
Dependent Claim
81 words
An apparatus according to claim 13 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said color switching illumination means having means for moving the relative position of said collimator lens and said four regions by a distance corresponding to one light-emitting region in each field period.
Claim 27
Dependent Claim
81 words
An apparatus according to claim 14 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said color switching illumination means having means for moving the relative position of said collimator lens and said four regions by a distance corresponding to one light-emitting region in each field period.
Claim 28
Dependent Claim
88 words
An apparatus according to claim 13 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said regions being arranged in a matrix, said color switching illumination means having means for moving the relative position of said collimator lens and said four regions by a distance corresponding to one light-emitting region in each field period.
Claim 29
Dependent Claim
88 words
An apparatus according to claim 14 , wherein said color switching illumination means has a collimator lens associated with four sets of four regions for emitting either one at a time of said red illuminating light, said green illuminating light, said blue illuminating light, and said achromatic illuminating light, said regions being arranged in a matrix, said color switching illumination means having means for moving the relative position of said collimator lens and said four regions by a distance corresponding to one light-emitting region in each field period.
Claim 30
Dependent Claim
32 words
An apparatus according to claim 13 , wherein the pixels in each unit are arranged in a square matrix with green and achromatic pixels positioned diagonally opposite in relation to each other.
Claim 31
Dependent Claim
32 words
An apparatus according to claim 14 , wherein the pixels in each unit are arranged in a square matrix with green and achromatic pixels positioned diagonally opposite in relation to each other.
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