Display with sub-region backlighting
First Claim
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1. A display comprising:
- a matrix of liquid crystal elements; and
a plurality of direct backlight devices, each direct backlight device being configured to selectively illuminate a discrete portion of said matrix of liquid crystal elements associated with a backlighting sub-region with a temporal sequence of at least two illumination color lights during an image frame period.
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Abstract
A display includes a matrix of liquid crystal elements, and a plurality of direct backlight devices. Each direct backlight device is configured to selectively illuminate a discrete portion of the matrix of liquid crystal elements associated with a backlighting sub-region with a temporal sequence of at least two illumination color lights during an image frame period.
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Citations
27 Claims
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1. A display comprising:
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a matrix of liquid crystal elements; and
a plurality of direct backlight devices, each direct backlight device being configured to selectively illuminate a discrete portion of said matrix of liquid crystal elements associated with a backlighting sub-region with a temporal sequence of at least two illumination color lights during an image frame period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display, comprising:
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a direct-view spatial light modulator having an array of pixel elements; and
an array of backlighting elements, each backlighting element being associated with a sub-region of the array of pixel elements and configured to provide a temporal sequence of illumination colored light to the associated sub-region of the array of pixel elements. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A display device, comprising:
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a first higher resolution light modulator, comprising an array of pixel elements configured to provide image information; and
a second lower resolution color light modulator, configured to illuminate the first higher resolution light modulator, comprising an array of independently-addressable color lighting devices, each lighting device configured to provide a temporal sequence of illumination colored backlighting to a sub-region of the higher resolution light modulator, in synchronization with selective actuation of the pixel elements of the higher resolution light modulator. - View Dependent Claims (18, 19, 20)
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21. A method for displaying an image, comprising the steps of:
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dividing an image signal for a single image frame into spatially discrete portions corresponding to a plurality of discrete backlight sub-regions of a direct-view spatial light modulator;
subdividing each spatially discrete portion of the image signal into temporally discrete sub-frames characterized by an illumination color across a range of pixel elements associated with the corresponding backlight sub-region;
modulating the spatial light modulator to sequentially actuate each range of pixel elements during each sub-frame; and
modulating a color backlight device in each sub-region for each sub-frame to sequentially provide the illumination color for each range of pixels for each sub-frame. - View Dependent Claims (22, 23, 24, 25)
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26. A method for displaying an image, comprising the steps of:
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analyzing an image signal to determine illumination colors and intensities for an image frame for a plurality of spatial sub-regions of a display;
generating a control signal for each sub-region based upon the image signal, the control signal being configured to temporally sequentially actuate a subset of pixels associated with the sub-region during a frame period; and
generating a control signal for a backlight device associated with the sub-region of pixels, so as to temporally sequentially actuate the backlight device to provide a desired illumination color for each subset of pixels for each sub-frame. - View Dependent Claims (27)
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Specification