Patent ID: 11881724
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method for a wireless charging device to charge at least one electronic device, the method comprising:
transmitting, by a processor of the wireless charging device, a first ping signal through a first group of coils and a second group of coils;
sensing a change in current, voltage, and/or frequency occurring in the first group of coils and the second group of coils in response to the first ping signal, and detecting that the at least one electronic device is placed on or in proximity to the wireless charging device;
selecting at least one coil from the first group of coils and at least one coil from the second group of coils at which the change in current, voltage, and/or frequency is sensed;
transmitting a second ping signal through the selected at least one coil of the first group of coils and the selected at least one coil of the second group of coils;
wirelessly transmitting power to the at least one electronic device by using the selected at least one coil of the first group of coils and the selected at least one coil of the second group of coils; and
setting remaining coils other than the selected at least one coil of the first group of coils and the selected at least one coil of the second group of coils as charging standby coils.