ELECTRIFYING DEVICE AND IMAGE FORMING DEVICE PROVIDED WITH ELECTRIFYING DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent unevenness of density that is generated due to unevenness in electrification by assuring electrifying of a body to be electrified without generating any ozone. SOLUTION: In an electrifying device 2, an electrifying roll 8 is provided in a vicinity of a surface of a photoreceptor drum 1 to form a specified gap within an electrifying range. DC bias that is controlled to a constant voltage and AC bias that is controlled to a constant current are fed to a core metal 11 of the electrifying roll 8 from a power source unit 12 and the surface of the photoreceptor drum 1 is uniformly electrified by them. The AC component of voltage applied to the electrifying roll 8 is controlled to the constant current of a specified current value so that a voltage value between peaks of AC that is more than 2 times a voltage value at the start of electrifying at a maximum gap between the electrifying roll 8 and the photoreceptor drum 1 can be obtained.