US 12,444,993 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. 18/356,021.
Application 18/356,021 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 2023/0378819 A1, Nov. 23, 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)] 9 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 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 by a threshold value based on a reference peak frequency included in the FOD status packet received from the wireless power receiver, design factor for the wireless power transmitter, and
wherein the threshold value is determined by the wireless power transmitter based on a design factor for the wireless power transmitter, and
wherein the FOD status packet includes a preamble, a header, a message, and a checksum for identifying whether an error occurs in the packet.