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Ambient light rejecting quad photodiode sensor

  • US 5,117,099 A
  • Filed: 10/29/1990
  • Issued: 05/26/1992
  • Est. Priority Date: 09/01/1989
  • Status: Expired due to Term
First Claim
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1. A photodiode array for detecting a projected image in the presence of ambient light, comprising a plurality of image sensing photodiodes connected together in parallel with like polarity, and a plurality of further photodiodes connected in parallel with and with reverse polarity to respective ones of said image sensing photodiodes, for compensating the effects of said ambient light on and sensor dark current within said image sensing diodes.

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