Patent ID: 7574159
Filing Date: 2009-08-11
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a photosensitive drum on which an electrostatic latent image is formed by an exposure unit; a developing unit accommodating toner to develop the electrostatic latent image; a main motor which rotates the photosensitive drum and operates the developing unit; an eraser unit which removes a potential charged on the photosensitive drum; a controller which controls the eraser unit to remove a potential of the photosensitive drum while the photosensitive drum rotates due to an inertial force after the main motor stops rotating; and a sensor which measures an average voltage of the toner in the developing unit during rotation of the photosensitive drum and a stationary voltage of the toner in the developing unit when the photosensitive drum stops rotating.