Patent ID: 7630659
Filing Date: 2009-12-08
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: a charge carrier configured to carry a charge; an AC voltage calculator configured to calculate a value of an alternating-current voltage of an application voltage based on first and second alternating-current voltages, first and second alternating currents, and a predefined reference alternating current capable of evenly charging a surface of the charge carrier; a charging device configured to charge the surface of the charge carrier, the charging device comprising: an instructing mechanism configured to generate an instruction, wherein the voltage value controller is configured to determine the alternating-current voltage value of the application voltage in accordance with the instruction generated by the instructing mechanism, the at least two alternating currents include the first and second alternating currents detected when the power controller applies the first and second alternating-current voltages, respectively, of the application voltage to the charge-applying device, and the first and second alternating-current voltages are different from each other and each have a value at least double a discharge-start voltage that initiates an electrical discharge from the charge-applying device to the charge carrier.