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. 24, 2018
Filed:
Mar. 06, 2014
Sony Corporation, Tokyo, JP;
Keigo Bunsen, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present disclosure includes a feed unit and a feed system. The feed unit includes a power transmission coil and a coupling coefficient calculation section. The power transmission coil is configured to transmit power to a power reception coil of a receiving unit using a magnetic field. The coupling coefficient calculation section is configured to measure frequency characteristics of input impedance of a rectification circuit of the receiving unit, the rectification circuit being in a non-operating state. The coupling coefficient calculation section is also configured to calculate a coupling coefficient between the power transmission coil and the power reception coil using the frequency characteristics of the input impedance of the rectification circuit that have been measured.