Patent ID: 9660486
Date: 2017-05-23
CPC Classifications: H01F,H02J

Claim:
1. A wireless power transmitter configured to wirelessly transmit power to a wireless power receiver, the wireless power transmitter comprising: a first coil configured to generate a first magnetic field for transmitting power via inductive coupling to the wireless power receiver; a second coil wound around the first coil and configured to generate a second magnetic field vibrating at a resonant frequency for transmitting power via resonant inductive coupling to the wireless power receiver; and a controller configured to: cause transmission of a detection signal comprising a wireless power signal; determine a wireless power transmission protocol corresponding to inductive coupling or resonant inductive coupling based on a control message response to the detection signal received from the wireless power receiver; and cause power to be selectively applied to the first coil or the second coil according to the control message response from the wireless power receiver.