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:
Nov. 25, 2014
Filed:
Aug. 15, 2012
Masahiko Kamata, Yokosuka, JP;
Masahiko Kamata, Yokosuka, JP;
Toshiba Lighting & Technology Corporation, Yokosuka-shi, Kanagawa-ken, JP;
Abstract
According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply and a power-supply-voltage converting section. The power-supply-voltage converting section includes a plurality of power-supply-voltage converting circuits provided between the rectifying circuit and a plurality of output sections to which loads are respectively connected. Switching elements configured to convert a power supply voltage rectified by the rectifying circuit and supply the power supply voltage to the loads are provided in the plurality of power-supply-voltage converting circuits. The switching elements of the plurality of power-supply-voltage converting circuits are set to at least two different switching frequencies and turned on and off with the respective switching frequencies fixed.