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. 21, 2014
Filed:
Aug. 01, 2013
Applicant:
Oki Data Corporation, Tokyo, JP;
Inventor:
Akira Nagumo, Tokyo, JP;
Assignee:
Oki Data Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/435 (2006.01); B41J 2/45 (2006.01); B41J 2/47 (2006.01); G03G 15/04 (2006.01); G03G 15/043 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
G03G 15/043 (2013.01); G03G 15/04054 (2013.01); B41J 2/45 (2013.01); H05B 33/0815 (2013.01);
Abstract
A drive circuit is provided for supplying a drive current to drive a plurality of driven elements. The drive circuit includes a switch circuit having an input terminal for receiving a drive signal alternately changing between an on state and an off state, and an output terminal connected to the driven elements; and a constant current circuit connected to the switch circuit for adjusting the drive current at a constant level. The constant current circuit is formed of a depletion type MOS transistor.