Patent ID: 9722463
Date: 2017-08-01
CPC Classifications: H02J,H04B

Claim:
1. A wireless power transmitter which wirelessly transmits a power to a wireless power receiver, the wireless power transmitter comprising: a power source for supplying a power; a transmission coil for wirelessly transmitting the power received from the power source; a detector for detecting a quantity of energy stored in the transmission coil; and a controller for adjusting an intensity and a transmission pattern of the power supplied to the transmission coil based on the detection result, wherein the controller controls the power source to supply the power that is pulsed at a predetermined time interval for a specific time to determine an existence state of the wireless power receiver and the detector determines that the wireless power receiver exists if the quantity of energy stored in the transmission coil is less than a threshold value while the power source supplies the pulsed power, and wherein the controller controls the power source to supply the power continuously if the wireless power receiver exists and adjusts an intensity of the power in response to a requirement of the wireless power receiver while the power source does continuously supply the power.