Patent ID: 7050729
Filing Date: 2006-05-23
Classification: G03G

Abstract:
1. An image forming apparatus comprising: electrostatic image forming means for forming an electrostatic image corresponding to image information on an image bearing member; developing means for developing the electrostatic image with a toner, said developing means including a developer container for accommodating a developer containing the toner and a carrier; toner density detection means for detecting a toner density in said developer container; toner replenishment amount control means for controlling an amount of the toner which is replenished to said developer container in accordance with a result of a detection by said toner density detection means, wherein said toner replenishment amount control means performs a control function such that the amount of the toner is maintained at a value equal to or larger than a replenishment amount lower limit value and equal to or smaller than a replenishment amount upper limit value; and changing means for changing the replenishment amount lower limit value and the replenishment amount upper limit value according to the image information.