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:
Sep. 06, 2022
Filed:
Nov. 02, 2018
Lg Innotek Co., Ltd., Seoul, KR;
Yong Il Kwon, Seoul, KR;
Jay Park, Seoul, KR;
LG INNOTEK CO., LTD., Seoul, KR;
Abstract
An embodiment of the present invention relates to a wireless charging method in a wireless power transmitter, the method comprising: a step of sensing an object in a charging region; a step of measuring a quality factor value; a step of receiving information including a reference quality factor value; a step of detecting a foreign object by using the measured quality factor value and the reference quality factor value; and a step of transmitting a response signal including ACK or NAK information according to whether or not the foreign object has been detected, wherein the wireless power transmitter transmits information including a first guaranteed power value when the response signal includes ACK information, and transmits information including a second guaranteed power value when the response signal includes NAK information, wherein the first guaranteed power value is greater than the second guaranteed power value.