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Variable Brightness LCD Backlight

  • US 20090146944A1
  • Filed: 02/18/2009
  • Published: 06/11/2009
  • Est. Priority Date: 08/31/2004
  • Status: Active Grant
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 brightness level that corresponds to the greatest initial brightness level associated with the pixels in the source image;

    modifying an intensity of a backlight associated with the backlit display device based on the first brightness level to produce a modified intensity level for the backlight;

    computing an LCD input image that is based on the first brightness level and the source image;

    generating the display image comprising a plurality of pixels, wherein each pixel in the display image is associated with a second brightness level that is determined by adjusting the modified intensity of the backlight based on the LCD input image; and

    displaying the display image on the backlit display device.

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