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:
Mar. 09, 2021
Filed:
Aug. 31, 2017
Wits Co., Ltd., Yongin-si, KR;
Yun Ki Hong, Suwon-si, KR;
Joung Ho Son, Suwon-si, KR;
Keun Soo Ha, Suwon-si, KR;
Dae Sik Kim, Suwon-si, KR;
Eun Young Shin, Suwon-si, KR;
Seung Won Park, Suwon-si, KR;
WITS Co., Ltd., Gyeonggi-do, KR;
Abstract
A wireless power transmitter includes a converter comprising at least one switching element, and configured to generate boosted input power; a resonator and a controller. The resonator is configured to receive the boosted input power as an alternating current (AC) power, and transmit a ping signal in a detection mode for determining whether any one or both of an external object approaching and a type of the external object. The controller is configured to control the switching element, and gradually increase a duty cycle of a gate signal provided to the switching element, in the detection mode.