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:
Jan. 28, 2014
Filed:
May. 12, 2011
Go Kato, Yokosuka, JP;
Hiroshi Kubota, Yokosuka, JP;
Masahiko Kamata, Yokosuka, JP;
Hiroshi Terasaka, Yokosuka, JP;
Tomokazu Usami, Yokosuka, JP;
Naoko Iwai, Yokosuka, JP;
Go Kato, Yokosuka, JP;
Hiroshi Kubota, Yokosuka, JP;
Masahiko Kamata, Yokosuka, JP;
Hiroshi Terasaka, Yokosuka, JP;
Tomokazu Usami, Yokosuka, JP;
Naoko Iwai, Yokosuka, JP;
Toshiba Lighting and Technology Corporation, Kanagawa, JP;
Abstract
In one embodiment, a DC power supply unit includes a DC power supply source; a load circuit connected to an output end of the DC power supply source; a load state detection device to detect a load voltage or an electric quantity corresponding to the load voltage; and a control device to receive the detected output of the load state detection device. The control device controls a maximum output voltage of the DC power supply source so that the voltage difference between the maximum output voltage of the DC power supply source and the load voltage at the time of normal operation falls within a predetermined range in which arc discharge is suppressed.