Invention Grant
- Patent Title: Image forming apparatus and image forming adjustment method
- Patent Title (中): 图像形成装置和图像形成调整方法
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Application No.: US11523321Application Date: 2006-09-18
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Publication No.: US07949289B2Publication Date: 2011-05-24
- Inventor: Kengo Matsuyama , Yoshikazu Harada , Norio Tomita
- Applicant: Kengo Matsuyama , Yoshikazu Harada , Norio Tomita
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Edwards Angell Palmer & Dodge LLP
- Agent David G. Conlin; Steven M. Jensen
- Priority: JP2005-282326 20050928
- Main IPC: G03G15/01
- IPC: G03G15/01

Abstract:
Multiple photoconductive drums on which images with different color components are formed respectively are rotated using individual motors, multiple adjustment images are formed at a predetermined interval along the cycle length of one rotation of each photoconductive drum, the reference phases for the rotation of the respective photoconductive drums are determined based on the maximum portions of the divergences between the predetermined interval and the detection interval of each adjustment image, and the individual motors are controlled so that the respective reference phases determined are aligned. The image forming region corresponding to the cycle length of one rotation of the photoconductive drum is divided into four or more even-numbered regions, the divergence amount of each region is calculated, and the maximum portions of the divergences are determined based on the difference between the divergence amounts of the divided regions being away from each other by a half cycle length.
Public/Granted literature
- US20070071510A1 Image forming apparatus and image forming adjustment method Public/Granted day:2007-03-29
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