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Contrast ratio enhancement system using black detector

  • US 8,089,433 B2
  • Filed: 01/11/2006
  • Issued: 01/03/2012
  • Est. Priority Date: 01/11/2006
  • Status: Active Grant
First Claim
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1. A method of enhancing a contrast ratio of a display device, the method comprising:

  • determining a quantity of accumulated pixels having a pixel blackness value between zero and a predetermined level of blackness in a frame of video data;

    comparing the quantity of accumulated pixels to a reference value that is indicative of a desired number of accumulated pixels that are in the frame of video data and that have pixel blackness values below the predetermined level of blackness; and

    modulating an illumination signal based on a quantity by which the quantity of accumulated pixels exceeds the reference value.

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