US 12,444,991 B2
Method for detecting foreign material, and device and system therefor
Jae Hee Park, Seoul (KR); and Yong Il Kwon, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Filed by LG INNOTEK CO., LTD., Seoul (KR)
Filed on Jul. 20, 2023, as Appl. No. 18/355,935.
Application 18/355,935 is a continuation of application No. 18/298,896, filed on Apr. 11, 2023, granted, now 12,034,317.
Application 18/298,896 is a continuation of application No. 17/318,000, filed on May 12, 2021, granted, now 11,646,607, issued on May 9, 2023.
Application 17/318,000 is a continuation of application No. 16/314,559, granted, now 11,070,095, issued on Jul. 20, 2021, previously published as PCT/KR2017/006975, filed on Jun. 30, 2017.
Claims priority of application No. 10-2016-0083406 (KR), filed on Jul. 1, 2016; application No. 10-2016-0090701 (KR), filed on Jul. 18, 2016; application No. 10-2016-0093483 (KR), filed on Jul. 22, 2016; and application No. 10-2016-0095293 (KR), filed on Jul. 27, 2016.
Prior Publication US 2023/0369903 A1, Nov. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 50/60 (2016.01); G01N 27/02 (2006.01); G01R 27/26 (2006.01); H02J 3/02 (2006.01); H02J 7/00 (2006.01); H02J 7/02 (2016.01); H02J 13/00 (2006.01); H02J 50/12 (2016.01)
CPC H02J 50/60 (2016.02) [G01N 27/02 (2013.01); G01R 27/26 (2013.01); H02J 3/02 (2013.01); H02J 7/00308 (2020.01); H02J 7/02 (2013.01); H02J 13/00001 (2020.01); H02J 50/12 (2016.02); H02J 7/00045 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A wireless power receiver that receives power from a wireless power transmitter, the wireless power receiver comprising:
a communication unit configured to communicate with the wireless power transmitter; and
a main controller,
wherein the main controller generates a plurality of packets including a foreign object detection (FOD) status packet,
wherein the communication unit transmits the FOD status packet to the wireless power transmitter, and the communication unit receives, from the wireless power transmitter, a response signal indicating whether a foreign object is present in a charging area of the wireless power transmitter,
wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver,
wherein each of the plurality of packets includes a preamble, a header, a message, and a checksum for identifying whether an error occurs in each packet,
wherein the header is configured to identify a type of the each packet, and
wherein the plurality of packets further include an end power transfer packet having a header value of “0x02” and a message size of 1 byte, and the end power transfer packet is used in both a ping phase and a power transfer phase.