Patent ID: 7941070

Claim:
An image forming apparatus comprising: an electrophotographic photosensitive member including a substantially cylindrical body having outer circumference on which a photosensitive layer having a latent image forming area is formed; and a non-contact electrification unit positioned substantially parallel to axial direction of the body; wherein a distance between a surface of the electrophotographic photosensitive member and the electrification unit is shorter at a middle portion of the latent image forming area than at end portions of the latent image forming area; the image forming apparatus satisfying the following Formula 1; 0.6 μm/° C.≦ D/T≦ 10.0 μm/° C.; Formula 1 wherein in the Formula 1, T is a difference between a temperature of the electrophotographic photosensitive member at a first reference point on the latent image forming area and a temperature of the electrophotographic photosensitive member at a second reference point on the latent image forming area, and D is a difference between a length of a first perpendicular line extending from the first reference point to the electrification unit and a length of a second perpendicular line extending from the second reference point to the electrification unit.