The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2021
Filed:
Jan. 14, 2020
Lg Electronics Inc., Seoul, KR;
Joonho Park, Seoul, KR;
Seonghun Lee, Seoul, KR;
Bongsik Kwak, Seoul, KR;
Jihyun Lee, Seoul, KR;
Sungkyu Kim, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
The present invention relates to a wireless power transfer apparatus. The wireless power transfer apparatus includes: a resonant circuit unit including a plurality of coils and a plurality of capacitor elements respectively connected to the plurality of coils; and a controller configured to calculate individual quality factor of each of the plurality of coils and a total quality factor of the plurality of coils, at a resonant frequency, and calculate whether foreign matter exists on a charging surface, based on the total quality factor and the individual quality factor, at the resonance frequency. Accordingly, foreign matter on the charging surface can be detected more easily.