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:
Apr. 24, 2012
Filed:
Sep. 17, 2009
Applicant:
Hidetoshi Yamashita, Kanagawa, JP;
Inventor:
Hidetoshi Yamashita, Kanagawa, JP;
Assignee:
Ricoh Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/435 (2006.01);
U.S. Cl.
CPC ...
Abstract
A first beam splitter splits each laser beam into a first beam and a second beam. A deflecting unit deflects a direction of the second beam. A second beam splitter splits the second beam into multiple split beams. A first photoelectric converting unit measures intensity of the first beam and outputs first voltage. A second photoelectric converting unit measures intensity of each split beam and outputs second voltage. A control unit updates a driving-current correction value using the first voltage and the second voltage, corrects a driving current, and controls intensity of the laser beam based on corrected driving current.