Patent ID: 8145080

Claim:
An image forming apparatus comprising: an image forming device including a photoconductive body that rotates, an electrostatic latent image being formed on the photoconductive body, a developing device that develops the electrostatic latent image on the photoconductive body with a developer to form a developer image, the developer being supplied by a developer supply member which rotates and to which a developing voltage is applied; and a transfer device that transfers the developer image onto a recording medium; a time detection unit that detects information concerning a stop time period of the developing device; a humidity measurement unit that is provided in a casing in which the image forming device is provided and that measures a humidity; and a controller that controls the developer supply member in the developing device based on the information concerning the stop time period detected by the time detection unit and information concerning the humidity measured by the humidity measurement unit, so as to rotate at a lower speed than a rotation speed at a normal time before the developing device starts a first developing operation after the developing device stopped.