公开(公告)号：US11031825B2

公开(公告)日：2021-06-08

申请号：US16475281

申请日：2018-01-02

Applicant: LG ELECTRONICS INC.

Inventor： Kyunghwan Kim ,  Jeongkyo Seo ,  Jinho Youn ,  Seonghun Lee

IPC: H02J50/60 ,  H02J50/90 ,  H02J50/30 ,  G01V8/14 ,  G02B27/14 ,  H02J7/02

Abstract: Disclosed in the present specification are a wireless power transmission apparatus, and a method therefor. The wireless power transmission apparatus (Tx) according to one embodiment of the present invention comprises: a laser light source unit; a light output unit for outputting, for wireless charging, laser light generated by the laser light source unit to a light receiving unit of a wireless power receiving apparatus; a foreign object (FO) sensing unit for sensing an FO by utilizing supplementary light; and a control unit for controlling the laser light output when an FO is sensed by the FO sensing unit.

公开(公告)号：US10971955B2

公开(公告)日：2021-04-06

申请号：US16915836

申请日：2020-06-29

Applicant: LG ELECTRONICS INC.

Inventor： Kyunghwan Kim ,  Yongcheol Park ,  Jihyun Lee ,  Gyunghwan Yook

IPC: H02J50/60 ,  H02J50/80 ,  H04B5/00 ,  H02J50/12 ,  H02J7/02

Abstract: Provided are an apparatus and method for performing foreign object detection in a wireless power transfer system. The present specification discloses a method comprising receiving a digital ping from the wireless power transmitter; transmitting an identification and configuration packets to the wireless power transmitter; transmitting a foreign object detection (FOD) state packet which indicates a reference Q factor of the wireless power receiver to the wireless power transmitter; and receiving wireless power through magnetic coupling from the wireless power transmitter based on the foreign object detection result of the wireless power transmitter using the reference Q factor. Irrespective of individual characteristics of a wireless power receiver, accuracy and reliability of detecting a foreign object may be improved.

公开(公告)号：US10892825B2

公开(公告)日：2021-01-12

申请号：US16904739

申请日：2020-06-18

Applicant: LG ELECTRONICS INC.

Inventor： Kyunghwan Kim ,  Gyunghwan Yuk ,  Byungsang Jung

IPC: H04B10/114 ,  H04B10/80 ,  H02J50/80 ,  H04B10/69 ,  H02J50/30 ,  H04B10/54

Abstract: An optical wireless power transfer system includes a transmission module, which includes a main light source configured to output a main light; a transmitting processor configured to modulate the main light to have a first modulation; a beam splitter configured to pass the main light as a power light; and a reception module. The reception module includes a retro-reflector configured to retro-reflect the main light back to the transmission module; and a receiving processor configured to control the retro-reflector to reflect the main light to have a second modulation based on a power generated by the main light. Further, the beam splitter is further configured to reflect the main light having the second modulation to a first photodiode included in the transmission module.