Optical sensor circuit, method of processing output signal...

Details Optical sensor circuit, method of processing output signal... Optical sensor circuit, method of processing output signal...

2007-08-14

2007-08-14

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C348S243000, C348S245000

Reexamination Certificate

active

11103480

ABSTRACT:
An optical sensor circuit has a first optical sensor that outputs a signal according to the amount of received light on an opened light-receiving surface, a second optical sensor that is provided near the first optical sensor and outputs a signal according to the amount of received light on a shielded light-receiving surface, and a difference calculating circuit that calculates a difference between the output signal of the first optical sensor and the output signal of the second optical sensor and outputs the difference.

REFERENCES:
patent: 6043892 (2000-03-01), Park
patent: 2003/0122060 (2003-07-01), Nixon et al.
patent: A-59-128415 (1984-07-01), None
patent: A-09-082931 (1997-03-01), None
patent: 1999-047769 (1999-06-01), None

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