Methods and Systems for Setting a Backlight Level
First Claim
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1. A method for selecting a display illumination-source power level, said method comprising:
- a) in a display system, receiving a first plurality of pixel values associated with an image;
b) determining a first image block associated with said image and a first illumination source in said display system, said first image block comprising a second plurality of pixel values from said first plurality of pixel values;
c) determining a second image block associated with said image and a second illumination source in said display system, wherein said first image block and said second image block overlap; and
d) selecting a final power level setting for said first illumination source, wherein said final power level setting minimizes a distortion measure between said second plurality of pixel values and a power-level-dependent clipped version of said second plurality of pixel values.
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Abstract
Aspects of the present invention are related to systems and methods for selecting backlight array driving values.
16 Citations
23 Claims
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1. A method for selecting a display illumination-source power level, said method comprising:
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a) in a display system, receiving a first plurality of pixel values associated with an image; b) determining a first image block associated with said image and a first illumination source in said display system, said first image block comprising a second plurality of pixel values from said first plurality of pixel values; c) determining a second image block associated with said image and a second illumination source in said display system, wherein said first image block and said second image block overlap; and d) selecting a final power level setting for said first illumination source, wherein said final power level setting minimizes a distortion measure between said second plurality of pixel values and a power-level-dependent clipped version of said second plurality of pixel values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for selecting a display illumination-source power level, said system comprising:
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a) an image receiver for receiving a first plurality of pixel values associated with an image; b) a block determiner for; i) determining a first image block associated with said image and a first illumination source in said display system, said first image block comprising a second plurality of pixel values from said first plurality of pixel values; and ii) determining a second image block associated with said image and a second illumination source in said display system, wherein said first image block and said second image block overlap; and c) a power-level selector for selecting a final power level setting for said first illumination source, wherein said final power level setting minimizes a distortion measure between said second plurality of pixel values and a power-level-dependent clipped version of said second plurality of pixel values. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. An image display system comprising:
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a) a display; b) an plurality of illumination sources; c) an image receiver for receiving an image for display on said display; and d) an illumination-source power level determiner for determining a power level setting for a first illumination source in said plurality of illumination sources, wherein said illumination-source power level determiner comprises; i) an image-block receiver for receiving a portion of said image; and ii) a distortion calculator for calculating a distortion measure associated with said portion of said image and a power level, wherein said distortion measure comprises; (1) a power-level penalty term; and (2) a mean-squared-error term between said portion of said image and a power-level-dependent clipped version of said portion of said image.
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Specification