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:
Apr. 23, 2019
Filed:
Dec. 22, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Jun Sumioka, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
In a vibrating-element driving circuit including a transformer and a coil as elements for stepping up a voltage, an improvement in a circuit efficiency of the driving circuit is achieved. The vibrating-element driving circuit includes a transformer, and an inductor connected to a primary side of the transformer, wherein an alternating voltage is applied to a primary winding coil of the transformer, an electro-mechanical energy conversion element of the vibration-type actuator is connected in parallel to a secondary winding coil of the transformer, the inductor is connected in series to the primary winding coil of the transformer, and wherein when the inductance of the inductor is Le, the inductance of the primary winding coil of the transformer is L, and Ka=L/Le, then the following is satisfied: 1≤Ka≤10.