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:
Aug. 30, 2016
Filed:
Mar. 29, 2013
Panasonic Corporation, Osaka, JP;
Futoshi Deguchi, Fukuoka, JP;
Yasuhito Yuasa, Osaka, JP;
Abstract
Reduction in the power transmission efficiency due to imprecise positioning between a primary power transmission coil and a secondary power reception coil is avoided. For transmitting electric power in a wireless manner to an electronic device including a secondary power reception coil and configured to receive electric power via the secondary power reception coil, a power transmission device includes a primary power transmission coil and a power transmission circuit unit for supplying electric power to the primary power transmission coil, and a transmission circuit unit is formed by the primary power transmission coil and the secondary power reception coil. A first impedance of an input end of the transmission circuit unit is matched with a second impedance of an output end of the transmission circuit unit by using a coupling coefficient between the primary power transmission coil and the secondary power reception coil.