Optical sensor circuit, method of processing output signal of the same, and electronic apparatus
AssigneeSeiko Epson Corporation
InventorTokuro Ozawa
Life of this patent
Estimating the term…
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.
Claims4
An optical sensor circuit comprising:
- a first optical sensor that outputs a first 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 second 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 first signal and the second signal and outputs a signal calculated from the difference and the second signal.
A method of processing an output signal of an optical sensor circuit which has a first optical sensor that outputs a first signal according to the amount of received light on an opened light-receiving surface, and a second optical sensor that is provided near the first optical sensor and outputs a second signal according to the amount of received light on a shielded light-receiving surface, the method comprising:
- calculating a difference between the first signal and the second signal;
- and
- outputting a signal calculated from the difference and the second signal.
Dependencies are inferred from the claim text.