US 12,395,016 B2
Method and device for improving communication quality on basis of PWM in wireless power transmission system
Jinho Youn, Seoul (KR); Taewook Kwon, Seoul (KR); Gyunghwan Yook, Seoul (KR); and Yongcheol Park, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 18/283,720
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Mar. 22, 2022, PCT No. PCT/KR2022/003967
§ 371(c)(1), (2) Date Sep. 22, 2023,
PCT Pub. No. WO2022/203343, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 10-2021-0037522 (KR), filed on Mar. 23, 2021.
Prior Publication US 2024/0178703 A1, May 30, 2024
Int. Cl. H02J 50/40 (2016.01); H02J 50/12 (2016.01); H02J 50/80 (2016.01); H04B 5/79 (2024.01)
CPC H02J 50/40 (2016.02) [H02J 50/12 (2016.02); H02J 50/80 (2016.02); H04B 5/79 (2024.01)] 8 Claims
OG exemplary drawing
 
1. A method for receiving a wireless power in a wireless power transfer system, the method performed by a wireless power receiver and comprising:
transmitting information related to a power transfer contract to a wireless power transmitter;
generating the power transfer contract with the wireless power transmitter based on the information; and
receiving the wireless power from the wireless power transmitter based on the power transfer contract,
wherein the wireless power receiver transmits the information to the wireless power transmitter based on an amplitude shift keying (ASK) signal, which is generated based on a pulse width modulation (PWM),
wherein the wireless power receiver controls the ASK signal based on adjusting a frequency or a phase of the PWM using power intensity or coupling degree, and
wherein the wireless power receiver increases modulation of the ASK signal based on that the power intensity or the coupling degree is low.