Conversion of a video signal for driving a liquid crystal display

  • US 6,359,663 B1
  • Filed: 12/14/1999
  • Issued: 03/19/2002
  • Est. Priority Date: 04/17/1998
  • Status: Expired due to Term
First Claim
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1. An apparatus (32) for converting a first video signal (33) into a second video signal (34), characterised in that it comprises:

  • a subtractor (36) for subtracting from the first video signal (33) a predicted present luminance, a processing block (39), having as input the output of the subtractor and the predicted present luminance, and as output a first and a second correction value, a first adder (37) for adding the first correction value of the processing block (39) and the predicted present luminance, thus forming the second video signal (34), a second adder for adding the second correction value and the predicted present luminance, thus forming the next predicted present luminance, a one-frame memory, for delaying the next predicted present luminance, thus forming the predicted present luminance for a next correction period.

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