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. 20, 2005
Filed:
Sep. 12, 2003
Hajime Kaji, Chiba, JP;
Hajime Kaji, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for controlling an image forming apparatus for forming a color image by superposing images formed at image forming units, each provided for a corresponding one of a plurality of color components, includes a first skipping step of skipping part of a main-scanning synchronizing signal in a first image forming unit for forming an image of a first color component, a first generation step of generating a sub-scanning reference signal based on the main-scanning synchronizing signal skipped in the first skipping step, a first exposure-scanning control step of controlling exposure scanning in a second image forming unit based on the main-scanning synchronizing signal skipped in the first skipping step and the sub-scanning reference signal generated in the first generation step, a second generation step of generating a sub-scanning reference signal in the second image forming unit for forming an image of a second color component, based on the sub-scanning reference signal generated in the first generation step, a second skipping step of performing skipping by determining a timing of skipping of the main-scanning synchronizing signal in the second image forming unit based on the sub-scanning reference signal generated in the second generation step, and an exposure-scanning control step of controlling exposure scanning in the second image forming unit based on the main-scanning synchronizing signal skipped in the second skipping step and the sub-scanning reference signal generated in the second generation step.