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:
Sep. 07, 2004
Filed:
Sep. 30, 2002
Applicant:
Inventor:
Yoshiki Yoshida, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 1/501 ; G02B 2/610 ;
U.S. Cl.
CPC ...
G03G 1/501 ; G02B 2/610 ;
Abstract
One color is determined as a reference, and adjustment is carried out such that other color is matched with a detection signal generated from a synchronous detector of this color. Each control circuit of other color generates a mark pulse signal by determining an optional position based on a DP generated from each synchronous detector. A reference color control circuit receives a mark signal, and measures time relative to the reference. A CPU checks whether a result of this measurement coincides with a target value. The CPU changes the setting according to the difference, and repeats the measurement until when there is no difference, thereby obtains an adjustment value.