Patent ID: 7742067

Claim:
An image forming apparatus, comprising: an image carrier; a charging device configured to charge the surface of the image carrier; an exposure device, including a first exposure unit configured to emit a first laser and a second exposure unit configured to emit a second laser so as to form an electrostatic latent image on the image carrier, the first laser and the second laser configured to expose a same exposure spot, wherein a spot size of the second laser is larger than a spot size of the first laser when the first exposure unit and the second exposure unit emit the first laser and the second laser, respectively, with a same light amount; an image formation unit configured to develop an electrostatic latent image formed by the exposure device into a toner image; and an exposure control unit configured to control the first exposure unit or the second exposure unit so as to change an exposure ratio between an exposure amount of the first laser and an exposure amount of the second laser for exposing the same exposure spot with the first laser and the second laser, wherein the exposure control unit is configured to change the exposure ratio between a first exposure ratio and a second exposure ratio different from the first exposure ratio when the first exposure unit or the second exposure unit exposes the image carrier on the basis of image data for forming an image with a certain density.