Title:
FOREIGN SUBSTANCE DETECTION METHOD FOR WIRELESS CHARGING AND APPARATUS THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/106072
Kind Code:
A1
Abstract:
The present invention relates to a foreign substance detection method, and an apparatus and a system therefor. A foreign substance detection method in a wireless power transmitter, according to an embodiment of the present invention, may comprise the steps of: if an object placed in a charging area is detected, searching for a current peak frequency with a maximum quality factor value in an available frequency band; receiving, from a wireless power receiver, a foreign substance detection state packet including a reference peak frequency; determining a foreign substance detection reference frequency on the basis of the reference peak frequency; and determining whether or not a foreign substance is present by comparing the current peak frequency with the foreign substance detection reference frequency. Therefore, the present invention has an advantage of being capable of detecting a foreign substance more effectively and accurately.
Inventors:
KWON YONG IL (KR)
PARK JAE HEE (KR)
PARK JAE HEE (KR)
Application Number:
PCT/KR2017/014417
Publication Date:
June 14, 2018
Filing Date:
December 08, 2017
Export Citation:
Assignee:
LG INNOTEK CO LTD (KR)
International Classes:
H02J50/60; H02J7/02; H02J50/12
Foreign References:
| KR20160022823A | 2016-03-02 | |||
| KR20150059069A | 2015-05-29 | |||
| US20140084857A1 | 2014-03-27 | |||
| KR20140113147A | 2014-09-24 | |||
| KR20150003408A | 2015-01-08 |
Other References:
See also references of EP 3553916A4
Attorney, Agent or Firm:
LEE, Seung Chan (KR)
Download PDF: