US 12,218,526 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. 18/223,960.
Application 18/223,960 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 2023/0361609 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 wireless power transmitter that transmits power to a wireless power receiver, the wireless power transmitter comprising:
a wireless communication unit configured to communicate with the wireless power receiver; and
a controller,
wherein the wireless communication unit receives a foreign object detection (FOD) status packet, and a packet having a length of eight bits to which a byte encoding technique is applied from the wireless power receiver,
wherein the controller determines whether a foreign object is present in a charging area of the wireless power transmitter on the basis of the FOD status packet,
wherein the wireless communication unit transmits, to the wireless power receiver, a foreign object detection indicator indicating whether the foreign object is present in the charging area of the wireless power transmitter on the basis of a result of the determination,
wherein the FOD status packet includes information on a reference quality factor or a reference peak frequency,
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,
wherein when the foreign object detection indicator indicates that the foreign object is not present in the charging area, the controller is configured to perform a wireless charging procedure with a first power, and
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.