US 11,916,615 B2
Device and method for wirelessly transmitting power on basis of reestablishment of out-band communication
Jinkwon Lim, Seoul (KR); Jingu Choi, Seoul (KR); Joonho Park, Seoul (KR); and Yongcheol Park, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/310,089
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Dec. 2, 2019, PCT No. PCT/KR2019/016873
§ 371(c)(1), (2) Date Jul. 15, 2021,
PCT Pub. No. WO2020/149525, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. 10-2019-0005938 (KR), filed on Jan. 16, 2019.
Prior Publication US 2022/0077893 A1, Mar. 10, 2022
Int. Cl. H04B 5/00 (2006.01); H02J 50/80 (2016.01); H02J 50/10 (2016.01); H04W 36/00 (2009.01); H02J 7/00 (2006.01); H02J 7/02 (2016.01); H02J 50/40 (2016.01); H02J 50/60 (2016.01)
CPC H04B 5/0037 (2013.01) [H02J 7/00045 (2020.01); H02J 7/02 (2013.01); H02J 50/10 (2016.02); H02J 50/80 (2016.02); H04W 36/03 (2018.08); H02J 50/40 (2016.02); H02J 50/60 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A wireless power receiver for receiving wireless power based on an out-band communication, comprising:
a power pickup circuit configured to receive wireless power from a wireless power transmitter based on magnetic coupling with the wireless power transmitter in an operation frequency and transform an alternate current (AC) signal generated by the wireless power to a direct current (DC) signal;
a communication/control circuit configured to be provided with the DC signal from the power pickup circuit, perform a handover to the out-band communication using a frequency except the operating frequency in an in-band communication using the operation frequency, transmit power characteristic information to the wireless power transmitter or receive the power characteristic information from the wireless power receiver based on the out-band communication before entering a power transfer phase, and perform a process of saving power state information determined during the power transfer phase; and
a load configured to receive the direct current from the power pickup circuit.