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:
Dec. 26, 2006
Filed:
Mar. 29, 2004
Applicant:
Kazuya Iwasaki, Ohta-ku, JP;
Inventor:
Kazuya Iwasaki, Ohta-ku, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In power source control method and a control circuit thereof and an image forming apparatus having the control circuit: when a logic circuit voltage detecting circuit (voltage detecting means) detects a voltage drop of a power source of a power voltage (logic circuit power source), a residual charge of a logic circuit power source is forcibly discharged by a power source control circuit (voltage control means), whereby a drive circuit voltage can be caused to attenuate faster than the fall of the power source of the power voltage (logic circuit power source) of the power source unit, thereby preventing damage to an image forming apparatus.