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Method And Apparatus For Adjusting Backlight Brightness

  • US 20090028460A1
  • Filed: 09/17/2007
  • Published: 01/29/2009
  • Est. Priority Date: 07/27/2007
  • Status: Active Grant
First Claim
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1. A method for adjusting backlight brightness in an image display device having a number of backlights arranged as an M×

  • N, 2-dimensional array, the method comprising;

    a full search step determining the brightness adjustment value for each of the M×

    N image blocks corresponding to the backlights for the entire input image and selecting a reference block;

    a partial search step determining the brightness adjustment value for the selected reference block and surrounding blocks thereof for the image frame inputted following the full search step and reselecting a reference block based on the brightness adjustment value of the previous reference block and surrounding blocks thereof; and

    an adjustment step adjusting brightness of the backlights in accordance with the brightness adjustment value for each block as determined by the full search step and/or partial search step.

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