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:
Oct. 26, 2004
Filed:
Dec. 17, 2001
Kazuhiro Okada, Ageo, JP;
Nobumitsu Taniguchi, Ageo, JP;
Wacoh Corporation, Saitama, JP;
Abstract
The invention provides a force detector in which power consumption is suppressed. Four electrodes (E -E ) are formed on a substrate, and an elastic deformable body formed of a ruber film is disposed thereon. A conductive coating is applied on the lower surface of the elastic deformable body to provide a displacing conductive layer ( ). Four capacitance elements (C -C ) are comprised by the electrodes (E -E ) and the displacing conductive layer ( ) opposed to the electrodes. The capacitance values thereof are converted into voltage values (V -V ) by C/V converter circuit ( ), and based on operation by signal processing circuit ( ), an external force applied to the elastic deformable body is detected. A pair of contacting electrodes (E ) and (E ) are formed on the substrate, and when an external force with a predetermined strength or more is applied, the elastic deformable body deforms, and the displacing conductive layer ( ) comes into contact with both electrodes (E ) and (E ). The potential of the electrode (E ) is taken-in from the terminal (T ), and when said potential is Vcc, the C/V converter circuit ( ) is operated in a standby mode with less power consumption, and when said potential is GND, the circuit is operated in a normal mode.