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. 10, 2019
Filed:
Sep. 26, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Jun Kawakatsu, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A power supply device controls a driving frequency of a transformer in which a primary side and a secondary side are insulated, thereby converting a voltage input to the primary side, and supplying a voltage output to the secondary side to a load. The power supply device includes a control unit, a switching element, and a setting unit. The control unit is configured to control operation of the switching element for driving the primary side of the transformer. The setting unit is configured to set an upper limit driving frequency of a driving frequency of the switching element. In a case where a voltage to be input to the primary side is higher than a rated input voltage, the control unit controls the operation of the switching element to perform driving by using the upper limit driving frequency as the driving frequency of the switching element.