US 12,341,350 B2
Device and method for controlling transmission of power in wireless power transmitting system
Joonho Park, Seoul (KR); Bongsik Kwak, Seoul (KR); Sungkyu Kim, Seoul (KR); and Jihyun Lee, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/044,600
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Apr. 2, 2019, PCT No. PCT/KR2019/003849
§ 371(c)(1), (2) Date Oct. 1, 2020,
PCT Pub. No. WO2019/194524, PCT Pub. Date Oct. 10, 2019.
Claims priority of application No. 10-2018-0039995 (KR), filed on Apr. 5, 2018.
Prior Publication US 2021/0028653 A1, Jan. 28, 2021
Int. Cl. H02J 50/12 (2016.01); H02J 50/00 (2016.01); H02J 50/40 (2016.01); H02J 50/60 (2016.01); H02J 50/80 (2016.01)
CPC H02J 50/12 (2016.02) [H02J 50/005 (2020.01); H02J 50/402 (2020.01); H02J 50/60 (2016.02); H02J 50/80 (2016.02)] 2 Claims
OG exemplary drawing
 
1. A wireless power transmitter configured to transmit wireless power, the wireless power transmitter comprising:
a power converter configured to transmit the wireless power to a wireless power receiver based on a primary coil array through magnetic coupling,
wherein the primary coil array comprises a plurality of primary coils; and
a communicator & controller configured to control the wireless power,
wherein the wireless power transmitter is configured to:
perform an analog ping,
wherein the analog ping results in a first set of primary coil combinations, among the plurality of primary coils of the wireless power transmitter;
for each of the primary coil combinations in the first set, perform, in a ping phase, a digital ping after performing the analog ping;
receive, from the wireless power receiver in the ping phase, at least one signal strength packet after the digital ping;
select a second set of primary coil combinations based on the at least one signal strength packet related to the digital ping among the first set related to the analog ping;
receive, from the wireless power receiver in a configuration phase, a configuration packet including an out-band field after the ping phase,
wherein the out-band field informs whether the wireless power receiver supports an out-band communication or not; and
receive, from the wireless power receiver in a negotiation phase, a foreign object detection (FOD) status packet after the configuration phase,
wherein the FOD status packet includes a reference quality factor value,
wherein the wireless power transmitter performs FOD based on the reference quality factor value.