Liquid crystal display backlight with modulation
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.
150 Citations
53 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 combined with temporally varying the luminance of said light source illuminating said plurality of displayed pixels during a frame of a video stream. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. 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 filtering image data to be displayed on said display; and
(d) wherein said filtering is based upon at least one of an illumination profile of said light source as affected by a light diffuser and an illumination profile of said light source as affected by a human visual system. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44)
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45. 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 comprises varying a luminance of a plurality of light sources illuminating a plurality of displayed pixels substantially within a frame in a sequence of video frames and varying said luminance of said light sources for less than all frames of said sequence. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53)
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Specification