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. 14, 2026
Filed:
Jul. 26, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Mitsunori Oshima, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A switching power supply includes a rectifier unit that subjects the AC power supply to rectification, a smoothing capacitor that smooths a rectified voltage, a switching unit disposed in parallel with the smoothing capacitor, a voltage detection circuit disposed between the AC power supply and the rectifier unit, a first switch element disposed between the AC power supply and the voltage detection circuit, a second switch element disposed between the rectifier unit and the smoothing capacitor, and a control unit. When the AC power supply, and the smoothing capacitor and the switching unit are connected, the second switch element is made conductive at a zero crossing point of the AC power supply.