Noise-compensated LCD display
AssigneeSharp Laboratories of America, Inc.
InventorsXiao-fan Feng, Scott J. Daly
Life of this patent
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Abstract
A method for displaying an input image on a display includes receiving the input image to be displayed on the display. The image is modified with a first process to determine a driving signal for a two-dimensional backlight array of independently selectable light emitting elements of the display. The first modified image is modified with a second noise reducing process to determine a driving signal for a two-dimensional liquid crystal layer defining pixels of the display. The two-dimensional backlight array has a different density of light emitting elements than the two-dimensional liquid crystal layer defining the pixels of the display.
Claims15
A method for displaying an input image on a display comprising:
- (a) receiving said input image to be displayed on said display and separating said input image into a backlight image and an LCD image, separation based at least in part on dividing said input image by said backlight image;
- (b) determining a driving signal for a two-dimensional backlight array of independently selectable light emitting elements of said display by using a first process on said input image;
- (c) determining a driving signal for a two-dimensional liquid crystal layer defining pixels of said display by using a second process that reduces noise present in pixel data of said input image, said second process occurring after said input image is divided by said backlight image and reducing noise based on gray-level data from said backlight array;
- (d) wherein said two-dimensional backlight array has a density of light emitting elements that differs from the density of LCD elements in said two-dimensional liquid crystal layer defining said pixels of said display.
A method for displaying an input image on a display comprising:
- (a) receiving said input image to be displayed on said display;
- (b) using said input image to create a first signal suitable for driving a two-dimensional backlight array of independently selectable light emitting elements of said display and a second signal suitable for driving a two-dimensional liquid crystal layer defining pixels of said display, and dividing said second signal by a modified said input image;
- (c) applying a noise reduction process to the divided said second signal, said noise reduction process reducing noise present in pixels of said input image.
Dependencies are inferred from the claim text.