US 12,218,525 B2
Method for detecting foreign material, and apparatus and system therefor
Jae Hee Park, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Filed by LG INNOTEK CO., LTD., Seoul (KR)
Filed on Jul. 19, 2023, as Appl. No. 18/223,958.
Application 18/223,958 is a continuation of application No. 18/181,208, filed on Mar. 9, 2023, granted, now 11,923,699.
Application 18/181,208 is a continuation of application No. 17/183,012, filed on Feb. 23, 2021, granted, now 11,652,371, issued on May 16, 2023.
Application 17/183,012 is a continuation of application No. 16/327,622, granted, now 11,005,303, issued on May 11, 2021, previously published as PCT/KR2017/009208, filed on Aug. 23, 2017.
Claims priority of application No. 10-2016-0106789 (KR), filed on Aug. 23, 2016; and application No. 10-2016-0117518 (KR), filed on Sep. 12, 2016.
Prior Publication US 2023/0361608 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 50/60 (2016.01); H02J 7/02 (2016.01); H02J 50/10 (2016.01); H02J 50/12 (2016.01); H02J 50/20 (2016.01); H02J 50/40 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC H02J 50/60 (2016.02) [H02J 7/02 (2013.01); H02J 50/10 (2016.02); H02J 50/12 (2016.02); H02J 50/20 (2016.02); H02J 50/402 (2020.01); H02J 50/80 (2016.02); H02J 50/90 (2016.02)] 6 Claims
OG exemplary drawing
 
1. A power transmission method for a wireless power transmitter, the power transmission method comprising:
receiving, from a wireless power receiver, a foreign object detection (FOD) status packet including information on a reference quality factor or a reference peak frequency, and a packet having a length of eight bits to which a byte encoding technique is applied;
determining whether a foreign object is present in a charging area of the wireless power transmitter based on the FOD status packet;
generating a foreign object detection indicator indicating whether the foreign object is present in the charging area of the wireless power transmitter based on a result of the determination and transmitting the generated foreign object detection indicator to the wireless power receiver,
wherein the byte encoding technique is a technique of inserting a start bit, a stop bit, and a parity bit into a binary bit stream of a differential bi-phase encoded packet for binary data of the packet having the length of eight bits; and
performing a wireless charging procedure with a first power when the foreign object detection indicator indicates that the foreign object is not present in the charging area,
wherein the FOD status packet includes a first FOD status packet including information on the reference quality factor and a second FOD status packet including information on the reference peak frequency.