Patent ID: 7450885

Claim:
A driving method of an image forming apparatus, the method comprising: providing a photoconductor, an exposure unit which forms an electrostatic latent image on the photoconductor, a developing unit which faces the photoconductor and forms a developing area for supplying toner to the electrostatic latent image, and a transferring unit which faces the photoconductor and forms a transfer area; performing a pre-rotation process to prepare for an image formation before starting to form an image, forming the electrostatic latent image by operating the exposure unit; developing the electrostatic latent image by operating the developing unit; and transferring the developed image to a paper by supplying the paper to the transfer area when a leading end of the developed image reaches the transfer area, wherein the developing unit is not operated during the pre-rotation process, delivering motor force of a developing motor to the developing unit is stopped after a tail end of the electrostatic latent image passes through the developing area, the developing unit comprises a developing roller which directly faces the photoconductor, and the developing roller is stopped when delivering motor force of a developing motor to the developing unit is stopped.