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. 25, 2011
Filed:
Apr. 26, 2006
Yasuaki Norimatsu, Ibaraki, JP;
Akihiko Kanouda, Ibaraki, JP;
Mutsumi Kikuchi, Ibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel celland an electric double-layer capacitorare parallelly arranged for a power supply. A DC/DC convertersteps up voltage of the fuel celland the electric double-layer capacitor, to thereby output power. An output switchis disposed on an output pathway of the DC/DC converter. By controlling the output switchwith a control IC, output power can be switched on and off. When there is a fuel shortage or abnormality in the fuel cell, the control ICcontrols the output switch, to thereby intermittently alter the output power. With this configuration, when the power supply is used for a mobile telephone as a portable electronic device connected thereto, a user can confirm whether there is a fuel shortage or a fuel cell abnormality by checking of blinking state of a charge pilot lamp of the mobile telephone.