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:
Nov. 22, 2011
Filed:
Feb. 15, 2008
Kota Onishi, Nagoya, JP;
Kentaro Yoda, Chino, JP;
Takahiro Kamijo, Fujimi, JP;
Mikimoto Jin, Chino, JP;
Haruhiko Sogabe, Chino, JP;
Yoichiro Kondo, Chino, JP;
Kuniharu Suzuki, Tokyo, JP;
Hiroshi Kato, Yokohama, JP;
Katsuya Suzuki, Takasaki, JP;
Manabu Yamazaki, Hiratsuka, JP;
Kota Onishi, Nagoya, JP;
Kentaro Yoda, Chino, JP;
Takahiro Kamijo, Fujimi, JP;
Mikimoto Jin, Chino, JP;
Haruhiko Sogabe, Chino, JP;
Yoichiro Kondo, Chino, JP;
Kuniharu Suzuki, Tokyo, JP;
Hiroshi Kato, Yokohama, JP;
Katsuya Suzuki, Takasaki, JP;
Manabu Yamazaki, Hiratsuka, JP;
Seiko Epson Corporation, Tokyo, JP;
Sony Ericsson Mobile, Tokyo, JP;
Abstract
A power-receiving-side control circuit of a power reception device performs intermittent load modulation by causing an NMOS transistor to be turned ON/OFF during normal power transmission. A power-transmission-side control circuit included in a power transmission control device of a power transmission device monitors, an intermittent change in the load of the power reception device during normal power transmission. The power-transmission-side control circuit determines that a foreign object has been inserted between a primary coil and a secondary coil and stops power transmission when an intermittent change in load cannot be detected. The amount of power supplied to the load may be compulsorily reduced when the load state of the load is heavy.