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:
Dec. 17, 2019
Filed:
Oct. 21, 2015
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Yasuyuki Shirasaka, Sakai, JP;
Takuma Hiramatsu, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, Osaka, JP;
Abstract
Disturbance noise is distinguished and an appropriate detection result is output in accordance with a state of each disturbance noise. A signal processing circuit () of a photodetection device () includes non-synchronous detection units () that detect existence of a light reception signal which is not synchronous with a light emitting drive timing in at least one of a case where it is determined that a value of the light reception signal exceeds a predetermined first threshold and a case where the value of the light reception signal becomes less than a predetermined second threshold in a non-synchronous detection period except a synchronous detection period in a detection period in the signal processing circuit (). In addition, is a case where existence of the light reception signal which is not synchronous with the light emitting drive timing is detected by the non-synchronous detection units (), the signal processing circuit () maintains a result of the detection of the existence/non-existence of the light reception signal acquired by the synchronous detection unit in a subsequent detection period.