Hoffmann & Baron, LLP
Wireless charging system method of controlling wireless charging of a rechargeable battery
An object of the present invention is to provide a wireless charging system and a control method thereof, as well as a portable electronic device and a charging device, all of which are capable of performing charging at an appropriate charging level. The wireless charging system includes: a battery charger 100; and a cellular telephone device 1. The cellular telephone device 1 includes: a plurality of power receiving units 10; a charging state monitoring unit 21; and a cellular telephone device side communication unit 14. The battery charger 100 includes: a plurality of power transmitting units 110 that transmit power to the cellular telephone device 1; a battery charger side communication unit 140; and a power transmission control unit 121 that controls transmission of power by the power transmitting units 110, based on a result of monitoring by the charging state monitoring unit 21. 
KYOCERA CORPORATION
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Hideki Hidekatsu Yu
Negishi Yamada Nishino