| 摘要 |
A wireless power transmission device for wirelessly transmitting power to a wireless power reception device according to an embodiment of the present invention includes a transmission induction coil which receives power from a power supply device; and a transmission resonance coil which transmits the power received from the transmission induction coil to the wireless power reception device. The wireless power transmission device informs about a chargeable area of the wireless power reception device on the basis of power transmission efficiency between the wireless power transmission device and the wireless power reception device. [Reference numerals] (230) Transmitting unit;(240) Identification unit;(250) Negotiation unit;(260) Light emitting unit;(270) Display unit;(280) Sound output unit;(290) Control unit;(340) Receiving unit;(350) Response signal delivery unit;(360) Negotiation unit;(370) Control unit |
