Wireless power transmission device and control method therefor
摘要
說明書
Furthermore, the predetermined power may be a power required to drive the wireless communication unit provided in the receiver. Here, the predetermined amount of power may be a preset amount. Furthermore, the predetermined power may be used to drive the wireless communication unit, and then used for the receiver afterwards when predetermined power is remained.
Furthermore, the power transmission control unit 180 may transmit the communication information and predetermined power using a frequency higher than an inherent resonant frequency of the transmitter. For example, the power transmission control unit 180 may transmit communication information and predetermined power using two frequencies f1, f2 higher than the resonant frequency.
At this time, the power transmission control unit 180 is able to transmit the communication information and predetermined power without any feedback of the receiver. Moreover, the receiver that has received the communication information and predetermined power may perform amplitude demodulation using different amplitudes of the two frequencies f1, f2, and analyze a signal through frequency demodulation when amplitude demodulation is difficult.
Through this, the transmitter and receiver may perform one-to-one communication using the demodulated signal.
A wireless power transmitter according to an embodiment of the present disclosure may perform the communication, and then transmit power to the receiver in a wireless manner (S342). At the same time, the present disclosure may control the power supply unit 190 not to transmit power in a wireless manner when the external material is not a receiver (S343).
