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Method of operating an image sensor having a digital exposure circuit

  • US 8,531,550 B2
  • Filed: 11/07/2011
  • Issued: 09/10/2013
  • Est. Priority Date: 04/23/1998
  • Status: Expired due to Fees
First Claim
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1. A method of operating an image sensor comprising:

  • counting a number of digital values indicating an overexposed pixel output during at least one image frame from said image sensor;

    counting a number of digital values indicating an underexposed pixel output during said at least one image frame;

    comparing results of said first and second counters with predetermined thresholds; and

    determining whether to increase, decrease, or maintain an exposure of a next frame of said image sensor based on the comparison results.

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