Patent ID: 7376376
Filing Date: 2008-05-20
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: a plurality of image bearing members configured to bear respective images; an optical writing unit configured to write the respective images on the plurality of image bearing members by deflecting a laser beam off a polygon mirror; a transfer unit configured to transfer the respective images onto an image receiving member; a controlling unit configured to perform an adjustment of a difference in phase of respective rotation speeds between the plurality of image bearing members at a timing of one of non-image forming operations during a series of image forming operations performed by the plurality of image bearing members, the optical writing unit, and the transfer unit; a rotation position detecting unit configured to detect respective rotation positions of the plurality of image bearing members; and a phase difference adjusting unit configured to calculate an amount of the phase difference based on a detection result obtained by the rotation position detecting unit and adjust the phase difference according to a result obtained by the calculation.