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:
Jan. 31, 2017
Filed:
Mar. 06, 2014
Panasonic Corporation, Osaka, JP;
Atsushi Fujita, Shiga, JP;
Yoshihiro Sakamoto, Nara, JP;
Yoshiharu Omori, Shiga, JP;
Hideki Sadakata, Shiga, JP;
Takashi Kashimoto, Nara, JP;
Hiroaki Kurihara, Shiga, JP;
Abstract
A contactless power transmission device includes a power receiver, a power feeder configured to contactlessly feed power to the power receiver, the power feeder including a primary coil configured to generate magnetic flux by an input alternating current voltage, and a cover configured to cover the primary coil, and a capacitive sensor configured to supply an alternating current voltage to an electrode to measure a capacitance occurring between the electrode and foreign matter present around the cover and thereby detect the foreign matter. The frequency of the alternating current voltage of the capacitive sensor is set to be higher than the frequency of the magnetic flux generated by the primary coil.