Patent ID: 7092647
Filing Date: 2006-08-15
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a developing device for developing an electrostatic image formed on an image bearing member in accordance with an image signal with a developer including a toner and a carrier; a toner container for containing the toner; a supplying member for supplying the toner from said toner container to said developing device; and controlling means for controlling an amount of toner supply to said developing device by moving said supplying member for a driving time corresponding to the image signal; and a density sensor for detecting a density of a reference toner image formed by said developing device, wherein when a value of the density of the reference toner image detected by said density sensor is equal to or less than a predetemined value, said controlling means changes the driving time to lengthen the driving time of said supplying member corresponding to the image signal.