Patent ID: 7995942

Claim:
An image forming apparatus comprising: an image carrier; an exposure unit that exposes a surface of the image carrier to light and forms an electrostatic latent image; a developing unit that includes a stirring roller stirring a developer and a developing roller moving toner to the surface of the image carrier, and develops the electrostatic latent image formed on the image carrier to form a toner image; a drive source that rotationally drives the developing roller and the stirring roller; and a control unit that controls the drive source to change a rotational speed of the developing roller in a first mode and a second mode of an image forming, respectively, rotates the developing roller at a first speed in the first mode, rotates the developing roller at a lower speed than the first speed in the second mode, and rotationally controls the stirring roller at an equal speed in both the first mode and the second mode.