The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2017
Filed:
Jun. 12, 2014
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Yasuyuki Shirasaka, Osaka, JP;
Takayuki Shimizu, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An object is sensed without a malfunction due to disturbance light. An optical sensor () of an aspect of the invention includes: a light-emitting element (LED) which turns off and turns on alternately for each one period; a light-receiving element (PD) which receives reflection light and generates a photocurrent; and an integrating circuit () which integrates the photocurrent in a positive direction in a period during which the light-emitting element turns on and integrates the photocurrent in a negative direction in a period during which the light-emitting element turns off. A sum of lengths of integration periods in a first period and a last period is same as a length of another integration period.