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. 08, 2017
Filed:
Sep. 25, 2014
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Akiyoshi Uchida, Akashi, JP;
Seiichi Kamon, Kakogawa, JP;
Kiyotaka Tanaka, Kakogawa, JP;
Masunari Tamesue, Akashi, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A power transmission device has: a power transmission unit configured to perform wireless power transmission; a communication unit configured to perform wireless communication within a range wider than a power transmission possible range of the power transmission unit; and a power transmission control circuit configured to control power of wireless power transmission of the power transmission unit, wherein the power transmission control circuit controls the power of wireless power transmission of the power transmission unit according to a number of power reception devices for which the communication unit received a response indicating that power reception is performed from power reception devices receiving power equal to or more than a threshold when the power transmission unit performs power transmission by first power, and a number of power reception devices for which the communication unit received a response indicating that power reception is performed from power reception devices receiving power equal to or more than the threshold when the power transmission unit does not perform power transmission or performs power transmission by second power smaller than the first power.