US 12,074,457 B2
Electronic device for wirelessly transmitting power and method of operating the same
Bohwan Choi, Suwon-si (KR); Jinsu Choi, Suwon-si (KR); Sungbum Park, Suwon-si (KR); Kyungmin Lee, Suwon-si (KR); and Sangwook Lee, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Oct. 19, 2022, as Appl. No. 17/969,283.
Application 17/969,283 is a continuation of application No. PCT/KR2022/015814, filed on Oct. 18, 2022.
Claims priority of application No. 10-2021-0139595 (KR), filed on Oct. 19, 2021.
Prior Publication US 2023/0118967 A1, Apr. 20, 2023
Int. Cl. H02J 50/60 (2016.01); H02J 50/12 (2016.01)
CPC H02J 50/60 (2016.02) [H02J 50/12 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A first electronic device for wirelessly transmitting power, comprising:
a power transmission circuit;
memory;
a pulse generator;
a foreign object detection circuit configured to detect a foreign object located in a path in which power is wirelessly transmitted through the power transmission circuit; and
a control circuit,
wherein the control circuit is configured to:
wirelessly transmit power to a second electronic device, based on an alternating current (AC) input voltage applied to the power transmission circuit,
generate a trigger signal synchronized with a first time corresponding to a specified voltage of the input voltage through the pulse generator,
store, in the memory, an output value of the foreign object detection circuit identified at the first time based on the trigger signal,
continuously obtain the output value stored in the memory from the memory during a specified time until before the trigger signal of a next period is received at the memory from the pulse generator, and
detect the foreign object based on the output value obtained during the specified time.