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. 08, 2014
Filed:
Oct. 06, 2008
Takeshi Togura, Sakura, JP;
Takeshi Togura, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
A capacitive proximity sensor () comprises a sensor unit () and a sense circuit unit (). The sensor unit () includes a sensor electrode (), a shield electrode () and an auxiliary electrode (). The sensor electrode () is connected to a C-V conversion circuit () and the shield electrode () is connected to a shield drive circuit (). The auxiliary electrode () is connected via a change-over switch () to the C-V conversion circuit () or the shield drive circuit (). The capacitance values (C, C) switched by the change-over switch () and detected at the C-V conversion circuit () are compared to arbitrarily set a range of a sense region on the sensor electrode ().