Patent ID: 8073348

Claim:
An image forming apparatus, comprising: an image bearing body on which an electrostatic latent image is formed; a developer bearing member that supplies developer to the electrostatic latent image; a developer supplying member that supplies the developer to said developer bearing member; an environment detecting section that detects at least one of an environmental condition outside of the image forming apparatus and an environmental condition inside of the image forming apparatus; and a voltage controller that corrects a voltage difference between a first voltage applied to said developer bearing member and a second voltage applied to said developer supplying member, the voltage difference being corrected in accordance with the detected environmental condition; wherein said environment detecting section includes: an external environment detector that detects a temperature outside of the image forming apparatus and a humidity outside of the image forming apparatus; and an internal temperature detector that detects an internal temperature inside of the image forming apparatus; wherein said voltage controller determines whether the following three conditions are satisfied: Condition I: the temperature outside of the image forming apparatus is equal to or higher than a first reference, Condition II: the humidity outside of the image forming apparatus is equal to or lower than a second reference, and Condition III: the temperature inside of the image forming apparatus is equal to or higher than a third reference; and wherein if all of the conditions I, II, and III are satisfied, then said voltage controller decreases the voltage difference.