Wireless power transmission device and control method thereof

A method performed by a wireless power transmission device, the method comprising:

• controlling a wireless power transmitter of the wireless power transmission device to transmit first power supplied by a working coil included in the wireless power transmitter to a cooking appliance;
• controlling a light source driver of the wireless power transmission device to measure second power induced in a sensing coil surrounding the working coil in which the sensing coil encompasses an outer side edge of the working coil, when the first power is transmitted through the working coil;
• and
• controlling the light source driver to set at least one of a light emission intensity of a light source of the wireless power transmission device, a light emission color of the light source, or a light emission form of the light source, based on an amount of the second power.

A cooking appliance comprising:

• a communication interface configured to establish a wireless communication connection with a wireless power transmission device;
• a reception coil configured to wirelessly receive power from a wireless power transmission device;
• a pickup coil configured to generate power for operation of a printed circuit board (PCB);
• a communication coil configured to perform wireless communication with the wireless power transmission device;
• a power supply electrically connected to the reception coil;
• a light source configured to emit light according to driving of the power supply;
• and
• at least one processor,
• wherein the at least one processor is configured to:
• measure first power received by the reception coil, and
• control the power supply to set at least one of a light emission intensity of the light source, a light emission color of the light source, or a light emission form of the light source, based on an amount of the first power,
• wherein a magnetic field generated from current flowing in a working coil passes through the reception coil,
• wherein, as the magnetic field passes through the reception coil, an induced current flows in the reception coil,
• wherein power is supplied to a load due to the induced current flowing in the reception coil,
• wherein the reception coil, the pickup coil, and the communication coil are disposed on a same layer or in a stack structure.