Patent ID: 7315703

Claim:
An image forming apparatus comprising: an image bearing body for bearing a latent image; a developer bearing body that bears a developer and that is for developing the latent image borne on said image bearing body with said developer a transferring section that transfers, onto a medium, a developer image formed on said image bearing body by the development of said latent image, to form an image; a voltage applying section that alternately applies, to said developer bearing body, a first voltage for making the developer move from said developer bearing body toward said image bearing body in order to develop said latent image, and a second voltage for making the developer move from said image bearing body toward said developer bearing body; an image darkness adjusting section for adjusting a darkness of the image to be formed on said medium by changing only said second voltage, among said first voltage and said second voltage; a developing device that is provided with said developer bearing body and that is for containing the developer to be borne by said developer bearing body, and a first voltage setting section for setting said first voltage in accordance with an amount of usage of said developing device; and said image darkness adjusting section adjusts the darkness of the image to be formed on said medium by maintaining said first voltage that has been set by said first voltage setting section, and changing said second voltage.