Variable brightness LCD backlight
First Claim
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1. A method for displaying a display image on a backlit display device, the method comprising:
- generating a source image comprised of a plurality of pixels, wherein each pixel in the source image has an associated initial brightness level;
determining a first backlight input for a first backlight that illuminates pixels of the display device and a second backlight input for a second backlight that illuminates pixels of the display device based on a first brightness profile, a second brightness profile, and the source image, wherein the first brightness profile comprises a mapping of non-uniform brightness of the first backlight as a function of pixel position and wherein the second brightness profile comprises a mapping of non-uniform brightness of the second backlight as a function of pixel position;
modifying a first intensity of the first backlight and a second intensity of the second backlight based on the first backlight input and the second backlight input; and
computing an LCD input image that is based on the first backlight input, the second backlight input, the first brightness profile, the second brightness profile, and the source image.
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Abstract
A display for a computer system, such as an LCD, is configured to consume less power when compared to conventional designs. The display includes a screen and at least one backlight configured to illuminate the screen. An input to the at least one backlight is adjustable to produce a desired level of brightness. The input may be computed based on a generated source image and a defined constraint. An input to the display is computed based on the input to the at least one backlight and the source image. The input to the display modifies the level of brightness provided by the at least one backlight to produce a viewable image.
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Citations
21 Claims
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1. A method for displaying a display image on a backlit display device, the method comprising:
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generating a source image comprised of a plurality of pixels, wherein each pixel in the source image has an associated initial brightness level; determining a first backlight input for a first backlight that illuminates pixels of the display device and a second backlight input for a second backlight that illuminates pixels of the display device based on a first brightness profile, a second brightness profile, and the source image, wherein the first brightness profile comprises a mapping of non-uniform brightness of the first backlight as a function of pixel position and wherein the second brightness profile comprises a mapping of non-uniform brightness of the second backlight as a function of pixel position; modifying a first intensity of the first backlight and a second intensity of the second backlight based on the first backlight input and the second backlight input; and computing an LCD input image that is based on the first backlight input, the second backlight input, the first brightness profile, the second brightness profile, and the source image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 21)
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8. A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause a computer system to display a display image on a backlit display device, by performing the steps of:
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generating a source image comprised of a plurality of pixels, wherein each pixel in the source image has an associated initial brightness level; determining a first backlight input for a first backlight that illuminates pixels of the display device and a second backlight input for a second backlight that illuminates pixels of the display device based on a first brightness profile, a second brightness profile, and the source image, wherein the first brightness profile comprises a mapping of non-uniform brightness of the first backlight as a function of pixel position and wherein the second brightness profile comprises a mapping of non-uniform brightness of the second backlight as a function of pixel position; modifying a first intensity of the first backlight and a second intensity of the second backlight based on the first backlight input and the second backlight input; and computing an LCD input image that is based on the first backlight input, the second backlight input, the first brightness profile, the second brightness profile, and the source image. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for displaying a display image, comprising:
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a display device; and one or more processors configured to carry out the steps of; generating a source image comprised of a plurality of pixels, wherein each pixel in the source image has an associated initial brightness level, determining a first backlight input for a first backlight that illuminates pixels of the display device and a second backlight input for a second backlight that illuminates pixels of the display device based on a first brightness profile, a second brightness profile, and the source image, wherein the first brightness profile comprises a mapping of non-uniform brightness of the first backlight as a function of pixel position and wherein the second brightness profile comprises a mapping of non-uniform brightness of the second backlight as a function of pixel position, modifying a first intensity of the first backlight and a second intensity of the second backlight based on the first backlight input and the second backlight input, and computing an LCD input image that is based on the first backlight input, the second backlight input, the first brightness profile, the second brightness profile, and the source image. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification