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Methods and systems for area adaptive backlight management

  • US 8,531,380 B2
  • Filed: 07/22/2008
  • Issued: 09/10/2013
  • Est. Priority Date: 07/22/2008
  • Status: Active Grant
First Claim
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1. A method for modifying display backlight target values, said method comprising:

  • a) receiving an initial backlight target value image, BL0;

    b) establishing an initial LED driving value (led0) image comprising on-grid LED points and off-grid virtual points located between said on-grid LED points of said initial backlight target value image by convolving said BL0 image with an LED mask comprising said virtual point off-grid locations;

    c) determining an approximated backlight image (bl1) by convolving said led0 image with a truncated point spread function (psf2) kernel;

    d) determining a backlight deficiency image (bl2), based on a difference between said BL0 image and said bl1 image;

    e) creating a compensated backlight image (bl3) by convolving said bl2image with a diffusion kernel; and

    f) determining a modified LED target value image (BL1) by adding said bl3image to said BL0 image.

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