Title:
FOREIGN MATERIAL DETECTION METHOD FOR WIRELESS CHARGING AND DEVICE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/194409
Kind Code:
A1
Abstract:
The present invention relates to a foreign material detection method and a device and system therefor. A method for detecting a foreign material in a wireless power transmitter according to an embodiment of the present invention may include: a step for measuring a quality factor value in an operation frequency band to search for the measurement peak frequency at which the quality factor value is largest, when an object disposed in a charging area is sensed; a step for storing the measurement peak frequency and a measurement quality factor value corresponding to the measurement peak frequency; a step for transmitting information about a transmitter type to an identified wireless power receiver; a step for receiving a reference quality factor value and a reference peak frequency corresponding to the transmitter type; and a step for using at least one among the reference quality factor value and the reference peak frequency to detect a foreign material. Accordingly, the present invention is advantageous in that a foreign material can be detected more effectively and accurately.
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Inventors:
PARK JAE HEE (KR)
KWON YONG IL (KR)
KWON YONG IL (KR)
Application Number:
PCT/KR2018/004589
Publication Date:
October 25, 2018
Filing Date:
April 19, 2018
Export Citation:
Assignee:
LG INNOTEK CO LTD (KR)
International Classes:
H02J50/60; G01R19/165; G01R23/15; G01R27/02; H02J7/02; H02J50/80
Foreign References:
| KR20160022823A | 2016-03-02 | |||
| KR20140036344A | 2014-03-25 | |||
| KR20170016171A | 2017-02-13 | |||
| US20140084857A1 | 2014-03-27 | |||
| KR20150059069A | 2015-05-29 |
Attorney, Agent or Firm:
LEE, Seung Chan (KR)
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