Variable brightness LCD backlight
First Claim
Patent Images
1. A method for displaying a viewed image, comprising:
- generating a source image having a first brightness bitmap;
modifying a first input to a first backlight and a second input to a second backlight based on the first brightness bitmap to illuminate a display surface of a display device, wherein the first backlight and the second backlight are part of a backlight array within the display device; and
generating a second brightness bitmap associated with the viewed image based on the first brightness bitmap and the illumination produced by the backlight array.
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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
12 Claims
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1. A method for displaying a viewed image, comprising:
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generating a source image having a first brightness bitmap; modifying a first input to a first backlight and a second input to a second backlight based on the first brightness bitmap to illuminate a display surface of a display device, wherein the first backlight and the second backlight are part of a backlight array within the display device; and generating a second brightness bitmap associated with the viewed image based on the first brightness bitmap and the illumination produced by the backlight array. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for displaying a viewed image, comprising:
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a display device having a backlight; and one or more processors configured to carry out the steps of; generating a source image having a first brightness bitmap; modifying an input to the backlight to illuminate a display surface of the display device based on the first brightness bitmap; and generating a second brightness bitmap based on the first brightness bitmap and the input to the backlight and transmitting the second brightness bitmap to the display device. - View Dependent Claims (9)
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10. A computer-readable medium storing instructions that, when executed by a processor, cause the processor to display a viewed image, by performing the steps of:
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modifying an input to a backlight of a display device based on first brightness bitmap associated with a source image, wherein the backlight is used to illuminate a display surface of the display device; generating a second brightness bitmap based on the input to the backlight and the first brightness bitmap; and transmitting the second brightness bitmap to the display device to generate a third brightness bitmap associated with the viewed image, wherein the third brightness bitmap is based on the second brightness bitmap and the illumination produced by the backlight.
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11. A display system for controllably illuminating a liquid crystal display (LCD) to display a viewed image, comprising:
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a backlight; an image display surface on the LCD; and a processor adapted to; respond to a source image to control the intensity of the backlight so that the brightness of a pixel in the viewed image on the image display surface approximates the brightness assigned to the pixel in the source image, and define an input image to the LCD based on the controlled backlight intensity and the source image; wherein a brightness level produced by the backlight is at least as great as a brightness associated with a brightest pixel in the source image. - View Dependent Claims (12)
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Specification