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:
Jul. 28, 2020
Filed:
Sep. 07, 2017
Wits Co. Ltd., Yongin-si, Gyeonggi-do, KR;
Jung Ho Son, Suwon-si, KR;
Keun Soo Ha, Suwon-si, KR;
Yun Ki Hong, Suwon-si, KR;
Seung Won Park, Suwon-si, KR;
Eun Young Shin, Suwon-si, KR;
Dae Sik Kim, Suwon-si, KR;
WITS Co., Ltd., Gyeonggi-do, KR;
Abstract
A wireless power transmitter includes a converter, a resonator, and a controller. The converter includes switching elements forming a bridge circuit, and is configured to output an alternating current (AC) voltage in response to control signals. The resonator includes a resonant capacitor and a resonant coil, and is configured to receive the AC voltage to wirelessly transmit power. The controller is configured to perform a first mode operation in which a duty of the control signals is fixed, a frequency of one of the control signals is varied and the control signals are output, and a second mode operation in which a frequency of the control signals is fixed, a duty of one of the control signals is reduced and the control signals are output.