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Digital exposure circuit for an image sensor

  • US 8,054,339 B2
  • Filed: 02/16/2010
  • Issued: 11/08/2011
  • Est. Priority Date: 04/23/1998
  • Status: Expired due to Fees
First Claim
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1. A device comprising:

  • a first counter which counts a number of digital values indicating an overexposed pixel output during at least one image frame;

    a second counter which counts a number of digital values indicating an underexposed pixel output during said at least one image frame;

    at least one comparator for comparing results of said first and second counters with programmable thresholds; and

    a decision element for making a decision to either increase, decrease, or maintain an exposure of a next frame of said image sensor based on comparison results from the at least one comparator.

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