US 12,249,850 B2
Method and apparatus for controlling wireless power transmission
Yu Ri 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. 18/356,078.
Application 18/356,078 is a continuation of application No. 18/117,631, filed on Mar. 6, 2023.
Application 18/117,631 is a continuation of application No. 17/830,993, filed on Jun. 2, 2022, granted, now 11,626,762, issued on Apr. 11, 2023.
Application 17/830,993 is a continuation of application No. 17/055,404, granted, now 11,381,119, issued on Jul. 5, 2022, previously published as PCT/KR2019/005881, filed on May 16, 2019.
Claims priority of application No. 10-2018-0056166 (KR), filed on May 16, 2018; and application No. 10-2018-0068751 (KR), filed on Jun. 15, 2018.
Prior Publication US 2024/0006927 A1, Jan. 4, 2024
Int. Cl. H02J 50/60 (2016.01); H02J 7/02 (2016.01); H02J 50/12 (2016.01); H02J 50/20 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01); H04L 5/00 (2006.01); H02J 50/40 (2016.01)
CPC H02J 50/60 (2016.02) [H02J 7/02 (2013.01); H02J 50/12 (2016.02); H02J 50/20 (2016.02); H02J 50/80 (2016.02); H02J 50/90 (2016.02); H04L 5/0055 (2013.01); H02J 50/402 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A wireless power transmitter of transmitting power to a wireless power receiver, comprising:
a controller configured to determine whether a foreign object is present in a charging area of the wireless power transmitter; and
a transmission part configured to transmit a wireless power according to whether the foreign object is present,
wherein the controller receives a signal including an FOD status packet from the wireless power receiver, determines whether the foreign object is present in a charging area of the wireless power transmitter based on the FOD status packet;
wherein the controller is set to operate in a first power transfer mode when it is determined that the foreign object is present in the charging area, or to operate in a second power transfer mode when it is determined that the foreign object is not present in the charging area;
wherein the controller receives a reception power packet including information on the reception power intensity from the wireless power receiver, determines the reception power intensity of the wireless power receiver based on the information on the reception power intensity, measures or calculates a power loss based on a difference between the determined reception power intensity and the transmission power intensity of the wireless power transmitter, and corrects any one of a transmission power, a reception power, and a loss of power using the power loss;
wherein the controller determines whether the foreign object is present in the charging area of the wireless power transmitter while being operated in the second power transfer mode;
wherein the FOD status packet includes a first FOD status packet and a second FOD status packet;
wherein the first FOD status packet includes one of a reference quality factor or a reference peak frequency; and
wherein the second FOD status packet includes the other of the reference quality factor and the reference peak frequency that is different from the first FOD status packet.