US 11,949,254 B2
In-band and out-band communication method and device in wireless power transmission system
Jingu Choi, Seoul (KR); Jinkwon Lim, Seoul (KR); Minsoo Lee, Seoul (KR); Joonho Park, Seoul (KR); and Yongcheol Park, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/594,165
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Nov. 29, 2019, PCT No. PCT/KR2019/016699
§ 371(c)(1), (2) Date Oct. 5, 2021,
PCT Pub. No. WO2020/204303, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 10-2019-0040095 (KR), filed on Apr. 5, 2019.
Prior Publication US 2022/0158505 A1, May 19, 2022
Int. Cl. H02J 50/80 (2016.01); H02J 50/10 (2016.01); H04B 1/00 (2006.01); H04B 5/00 (2006.01)
CPC H02J 50/80 (2016.02) [H02J 50/10 (2016.02); H04B 1/005 (2013.01); H04B 5/0037 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A wireless power receiver comprising:
a power pickup circuit configured to:
receive a wireless power from a wireless power transmitter by a magnetic coupling with the wireless power transmitter having a primary coil at an operating frequency, and
convert an AC signal generated by the wireless power into a DC signal;
a communication circuit configured to:
perform an in-band communication with the wireless power transmitter using the operating frequency, and
perform an out-band communication with the wireless power transmitter or other device using a frequency other than the operating frequency; and
a control circuit configured to control an overall operation of the wireless power receiver,
wherein the communication circuit in the wireless power receiver includes:
a first out-band communication module configured to perform the out-band communication with the other device using the frequency other than the operating frequency; and
a second out-band communication module configured to perform the out-band communication with the wireless power transmitter using the frequency other than the operating frequency,
wherein, according to the second out-band communication module operating as a scanner, the second out-band communication module shares information about a scan record with the first out-band communication module,
wherein, according to the second out-band communication module operating as a master after the second out-band communication module operating as the scanner connects with the wireless power transmitter, the second out-band communication module shares scheduling information with the first out-band communication module,
wherein the second out-band communication module receives or transmits information related to a wireless charging from or to the wireless power transmitter, and
wherein, according to the second out-band communication module receiving a retransmission request for a packet transmitted by the wireless power receiver from the wireless power transmitter, the second out-band communication module reshares the scheduling information with the first out-band communication module.