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:
Oct. 24, 2006
Filed:
Dec. 08, 2004
Ryo Takamatsu, Tokyo, JP;
Naoki Sato, Tokyo, JP;
Yuusuke Ishizaki, Tokyo, JP;
Hiroto Ohishi, Tokyo, JP;
Masahide Nakaya, Tokyo, JP;
Keiichi Sugai, Tokyo, JP;
Ryo Takamatsu, Tokyo, JP;
Naoki Sato, Tokyo, JP;
Yuusuke Ishizaki, Tokyo, JP;
Hiroto Ohishi, Tokyo, JP;
Masahide Nakaya, Tokyo, JP;
Keiichi Sugai, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A main controller controls a capacitor charger to charge a capacitor as necessary. A sub-controller controls a power saving mode and stops a power supply to the main controller when shifting to the power saving mode. A charge control circuit compares a terminal voltage of the capacitor with a predetermined value by a comparator circuit. If the terminal voltage is lower than the reference value, an AND circuit takes a logical product of an output signal of the comparator circuit and a power saving signal indicating the shift to the power saving mode, and outputs a control signal indicating an instruction to charge the capacitor, to the capacitor charger.