Patent ID: 11862990
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A wireless charging device comprising:
a first inverter,
a first switch electrically connected to the first inverter;
a second inverter,
a second switch electrically connected to the second inverter;
a first coil group connected to the first inverter through the first switch;
a second coil group connected to the second inverter through the second switch; and
a processor operatively connected to the first inverter, the first switch, the second inverter, the second switch, the first coil group, and the second coil group,
wherein the processor is configured to:
detect an electronic device disposed above the wireless charging device through at least one coil in the first coil group or the second coil group, and
wirelessly transmit power to the electronic device by using one coil in the first coil group and one coil in the second coil group, and

wherein the processor is further configured to:
transmit a ping signal to the electronic device through each of the first coil group and the second coil group when the electronic device is detected,
identify a position of the electronic device through a feedback signal including a signal strength packet (SSP) signal returned from the electronic device, and
select, as operating coils, a coil having a largest value of the SSP signal in the first coil group and a coil having a largest value of the SSP signal in the second coil group.