To provide an image forming apparatus in which DC voltage or DC current is set to the optimal value by simple circuit constitution.
The image forming apparatus has: a photoreceptor drum 2 which is rotationally driven; a electrifying roller 3 which is arranged in contact with or close to the photoreceptor drum 2 and electrically charges the photoreceptor drum 2; an electrode 9 arranged opposite to the photoreceptor drum 2; a voltage detection part 7 which detects an amount of change in surface potential of the photoreceptor drum 2 which appears on the electrode 9; and a control part 8 which changes the DC voltage or the DC current to be applied to the electrifying roller 3 like steps and controls the DC voltage or the DC current to be applied to the electrifying roller 3 based on a detection result of the voltage detection part 7. Consequently, the amount of change in the surface potential of the photoreceptor drum 2 is detected and the optimal DC voltage or DC current to be applied to the electrifying roller 3 is detected by the simple constitution.
| JP2001066857 | IMAGE FORMING DEVICE |
| JP2021039257 | CLEANING MEMBER AND CHARGING DEVICE |
IKEDA CHIKAO
MORIYA HIDEKI
OMORI MASAO
