PURPOSE: To provide an image forming device free from deterioration of sensitivity after endurance and capable of obtaining an excellent image without blurring.
CONSTITUTION: In this image forming device using a contact type charging system; a substance to be charged is a photoreceptor having a photoreceptive layer containing a charge transfer material shown by an expression on a conductive supporting body. When the charging member corresponds to the image non-forming area of the substance to be charged the charging member is subjected to DC constant voltage (or constant current) control. The DC current quantity (or voltage quantity) in accordance with the layer thickness of the substance to be charged at such a time is detected and the charging member is subjected to DC constant voltage (or constant current) control so as to attain the DC voltage (or current) corresponding to the detected DC current quantity (or the voltage quantity) when the charging member corresponds to the image forming area of the substance to be charged.
GOTO KOJI
YOSHIDA AKIRA
OMORI HIROYUKI
