| 摘要 |
PROBLEM TO BE SOLVED: To provide a charging control device capable of charging a plurality of a body to be charged to the optical values by accurately obtaining the AC value of the body that has the highest application AC value when saturating. SOLUTION: The charging control device includes: a plurality of charging rolls 3 provided for a plurality of corresponding photoreceptors 2, each charging roll 3 being used to charge the corresponding photoreceptor 20 by applying an AC voltage and a DC voltage to the photoreceptor 20; a DC current detecting section 13 for detecting a DC current flowing in each of the photoreceptors 20 from the corresponding charging roll 30; and a control section 14. The control section selects one of the photoreceptors 2 each time, measures a DC current obtained when an AC current of a predetermined level is caused to flow in the selected photoreceptor 2, and calculates a difference between the average value and maximum value of the AC voltages. The control section 14 applies the voltage in which a DC voltage overlaps an AC voltage to each of the plurality of photoreceptors. When the AC value of the AC voltage is swept over, the AC value when the predetermined photoreceptor saturates, calculated from changes in the DC currents flowing in the corresponding photoreceptors, is shifted by a difference, and thus the AC values when all the photoreceptors saturate are obtained. COPYRIGHT: (C)2007,JPO&INPIT
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