| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device capable of controlling the charge potential of an image carrier at a predetermined potential without causing fog and darkness variations on the resulting images even at low environmental temperatures. SOLUTION: The image forming device 100 includes: a high voltage generating circuit 91 for applying an oscillating voltage to a charging member 42 disposed in contact with or proximity to the image carrier 41, the oscillating voltage having a DC voltage Vdc and an AC voltage Vac superimposed thereon; a current detecting portion 96 for detecting the value of a DC current Idc between the image carrier 41 and the charging member 42; an AC voltage control portion 52 for controlling the value of the AC voltage Vac so as to secure the detected value of the DC current Idc within a target current range. The image forming apparatus has an aging control portion 54 for performing rotation driving of the image carrier while securing the AC voltage Vac and the DC voltage Vdc at preset voltage values and setting the frequency of the AC voltage Vac at a frequency different from a frequency during an image forming operation. COPYRIGHT: (C)2009,JPO&INPIT |
