Patent ID: 6529693
Filing Date: 2003-03-04
Classification: G03G

Abstract:
An image forming apparatus comprising:an image bearing member; image forming means for forming an electrostatic latent image including an image portion and a non-image portion on said image bearing member; developing means for developing the electrostatic latent image on said image bearing member with toner; transfer means for electrostatically transferring a toner image on said image bearing member to a transfer material; detecting means for detecting environmental humidity; and control means for controlling a difference between an electric potential of the image portion and a voltage to be applied to said developing means to alter a toner amount per unit area of the toner image on said image bearing member in accordance with an output of said detecting means, wherein said control means controls the difference between the electric potential of the image portion and the voltage to be applied to said developing means so that the toner amount per unit area of the toner image decreases with decreasing values of environmental humidity detected by said detecting means.