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:
Jul. 10, 2012
Filed:
Aug. 27, 2009
Takuma Hiramatsu, Osaka, JP;
Ryohhei Tada, Osaka, JP;
Isamu Kawabe, Osaka, JP;
Naruichi Yokogawa, Osaka, JP;
Takuma Hiramatsu, Osaka, JP;
Ryohhei Tada, Osaka, JP;
Isamu Kawabe, Osaka, JP;
Naruichi Yokogawa, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An optical modulation-type detection device has a noise detection mode having (i) an offset canceling (hereinafter referred to as 'OC') period in which (a) the light-reception signal pathway of a pulse signal converting section is cut off so that an offset of the pulse signal converting section is suppressed and (b) the light-reception signal pathway of the pulse signal converting section is reconnected while a state in which the offset is suppressed is being maintained, at an end of the OC period, and (ii) an asynchronous reception period in which whether or not asynchronous reception occurs is detected after the first period, and an object detection mode having a synchronous reception period in which whether or not synchronous reception occurs is detected after the asynchronous reception is not detected in the noise detection mode.