H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/98, 350/76.1
H04N 17/04 (2006.01) H04N 9/28 (2006.01) H04N 9/31 (2006.01) H04N 17/02 (2006.01)
Patent
CA 1329256
ABSTRACT An ambient light rejecting quad photodiode sensor having compensation diodes connected with reverse polarity to respective quadrant photodiodes within the sensor, the compensation diodes being located outside of the area of illumination. By direct connection of compensation diodes in reverse polarity to each quadrant of the quad photodiodes, a large boost in signal to noise ratio is achieved for eliminating the effects of ambient room light as well as sensor dark current.
610177
Schmidt Terrence Carl
Christie Digital Systems Inc.
Sim & Mcburney
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