| 摘要 |
PROBLEM TO BE SOLVED: To obtain an image forming device without causing any streaky density irregularity in the direction perpendicular to the rotating direction of a photoreceptor in the case of using AC voltage as developing bias voltage in a developing device equipped with plural developer carriers. SOLUTION: The developing device is equipped with plural developer carriers provided to be opposed to the photoreceptor, a developing bias applying means applying the developing bias voltage obtained by superposing AC voltage on DC voltage to the developer carrier, and a phase varying means making the phase of the AC voltage in the developing bias voltage different among the respective developer carriers. |
