Liquid crystal display backlight with filtering
2 Assignments
0 Petitions
Accused Products
Abstract
A display is backlit by a source having spatially modulated luminance to attenuate illumination of dark areas of images and increase the dynamic range of the display.
161 Citations
86 Claims
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1-22. -22. (canceled)
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23. A method of illuminating a backlit display, said method comprising:
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(a) spatially varying the luminance of a light source illuminating a plurality of displayed pixels;
(b) varying the transmittance of a light valve of said display in a non-binary manner;
(c) wherein said spatially varying luminance of said light source is based upon low-pass filtering image data to be displayed on said display. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of illuminating a backlit display, said method comprising:
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(a) spatially varying the luminance of a light source illuminating a plurality of displayed pixels;
(b) varying the transmittance of a light valve of said display in a non-binary manner;
(c) wherein said spatially varying luminance of said light source is based upon sub-sampling image data to be displayed on said display. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A method of illuminating a backlit display, said method comprising:
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(a) spatially varying the luminance of a light source illuminating a plurality of displayed pixels;
(b) varying the transmittance of a light valve of said display in a non-binary manner;
(c) wherein spatially varying luminance of said light source is based upon non-linear rescaling image data to be displayed on said display. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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70. A method of illuminating a backlit display, said method comprising:
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(a) spatially varying the luminance of a light source illuminating a plurality of displayed pixels;
(b) varying the transmittance of a light valve of said display in a non-binary manner;
(c) wherein spatially varying luminance of said light source is based upon rescaling sub-sampled image data to be displayed on said display. - View Dependent Claims (71, 72, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
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73. The method of 71 wherein said resealing sub-sampled image data relative to image data to be displayed on said display is used to achieve a constant slope gray scale to avoid excess contrast at said plurality of displayed pixels.
Specification