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. 29, 2022
Filed:
Mar. 24, 2020
Rohm Co., Ltd., Kyoto, JP;
Daisuke Uchimoto, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A transmission coil used in a wireless power transmitter includes a first coil, a second coil electrically connected in series with the first coil, and a tap provided at a connection node of the first coil and the second coil, the first coil and the second coil being stacked to at least partially overlap with each other. A transmission antenna includes the transmission coil, a first capacitor and a second capacitor connected in series with the transmission coil, and a switch provided in parallel to a series connection circuit of the second coil of the transmission coil and the second capacitor. A wireless power transmitter includes the transmission antenna and a bridge circuit that drives the transmission antenna. A charger includes the wireless power transmitter.