Sharp Kabushiki Kaisha Corporation

Yutaka Eba

Norio Tomita

Yoshikazu Harada

Tetsushi Ito

Yoshiteru Kikuchi

Kengo Matsuyama

A color image forming apparatus including: a plurality of drum-type photoconductors for forming an image in a different color on each peripheral surface and the photoconductors having at least two different diameters; a plurality of driving sections for driving each photoconductor at a driving speed in accordance with the diameter so that each photoconductor rotates at a predetermined peripheral speed; a correction signal output section for outputting a speed correction signal to correct a periodic pitch fluctuation included in each formed image; and a drive control section for controlling the driving section to correct the driving speed of each photoconductor by the speed correction signal, wherein the speed correction signal is a signal having the same cycle as a rotational cycle of each photoconductor.

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Tenri, Japan

Yutaka Eba