US 12,149,100 B2
Wireless power transmission device and electronic apparatus
Jungkeun Park, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/013,099
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jun. 24, 2020, PCT No. PCT/KR2020/008220
§ 371(c)(1), (2) Date Dec. 27, 2022,
PCT Pub. No. WO2021/261613, PCT Pub. Date Dec. 30, 2021.
Prior Publication US 2023/0253835 A1, Aug. 10, 2023
Int. Cl. H02J 50/40 (2016.01); H02J 50/10 (2016.01); H02J 50/80 (2016.01)
CPC H02J 50/402 (2020.01) [H02J 50/10 (2016.02); H02J 50/80 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A wireless power transmission device for wirelessly transmitting a transmission power to operate an electronic apparatus, comprising:
a plurality of transmission coils having different inductances; and
a controller,
wherein the controller is configured to:
wirelessly transmit a first transmission power to the electronic apparatus through a first transmission coil among the plurality of transmission coils,
obtain whether the wireless power transmission device and the electronic apparatus are in an under-coupling mode or an over-coupling mode, when receiving power shortage information from the electronic apparatus,
change from the first transmission coil to a second transmission coil according to the obtained mode, and
wirelessly transmit a second transmission power to the electronic apparatus through the changed second transmission coil,
wherein the second transmission coil is one of the remaining transmission coils except for the first transmission coil among the plurality of transmission coils.