Patent ID: 9124309
Filing Date: 2015-09-01
Classification: H01F,H02J,H04B

Abstract:
1. A wireless power transmission method of a wireless power transmitter for transmitting power using a resonance coil via a resonance frequency band to a wireless power receiver, the wireless power transmission method comprising: transmitting a connection signal for identifying a first wireless power receiver; identifying the first wireless power receiver by receiving a response signal corresponding to the connection signal from the first wireless power receiver; transmitting state information of the wireless power transmitter to the first wireless power receiver via a specific frequency band, wherein the state information comprises an available amount of power of the wireless power transmitter; receiving first specific state information from the first wireless power receiver via the specific frequency band, wherein the first specific state information comprises a demanded amount of power of the first wireless power receiver, and wherein the demanded amount of power is adjusted by the first wireless power receiver within the available amount of power of the wireless power transmitter; and transmitting the power to the first wireless power receiver according to the first specific state information via the resonance frequency band being a resonance-coupled frequency between the wireless power transmitter and the first wireless power receiver and being different from the specific frequency band.