Patent ID: 11923692
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method for operating a first wireless power transmission device comprising a first power source, a plurality of first patch antennas, a first RF circuit connected to the first power source and the plurality of first patch antennas, a communication circuit configured to communicate with an electronic device configured to wirelessly receive power, a first interface comprising interface circuitry, and a processor, the method comprising:
detecting, based on a change of a voltage value in the first interface, a connection with a second wireless power transmission device comprising a second power source, a second RF circuit, and a plurality of second patch antennas through the first interface;
based on detection of the connection, selecting, as a master device, the first wireless power transmission device among the first wireless power transmission device and the second wireless power transmission device, based on a pre-established communication connection between the electronic device and the first wireless power transmission device,
controlling the first RF circuit to adjust at least one of a phase or an amplitude of each of a plurality of first electrical signals received from the first power source, and output the plurality of first electrical signals of the adjusted phase or amplitude to the plurality of first patch antennas respectively;
transmitting first control data to the second wireless power transmission device through the first interface while controlling the first RF circuit, wherein the first control data is for the second RF circuit to adjust at least one of a phase or an amplitude of each of a plurality of second electrical signals received from the second power source, based on the first control data, wherein controlling the first RF circuit includes identifying, as a reference antenna, one of the plurality of first patch antennas, and causing the first RF circuit to be controlled to apply a reference current to the reference antenna;
controlling the communication circuit to receive at least one communication signal from the electronic device configured to convert RF waves, formed from the plurality of first patch antennas and the plurality of second patch antennas, into electrical signals;
identifying a first optimum phase adjustment degree of the first RF circuit and a second optimum phase adjustment degree of the second RF circuit, based on information included in each of the at least one communication signal; and
transmitting second control data to the second wireless power transmission device through the first interface, while controlling the first RF circuit to control an input electrical signal to the first optimum phase adjustment degree, wherein the second control data is for the second RF circuit to control an electrical signal input to the second wireless power transmission device to the second optimum phase adjustment degree.