Image forming apparatus

摘要

An image forming apparatus includes a photosensitive member, a developing portion to develop an electrostatic image on the photosensitive member, and a sensor to detect a toner image formed by the developing portion to output density information depending on a toner amount per unit area. A controller controls a supply of developer on the basis of a detection result of a supply control toner image. The controller adjusts an exposure condition for forming the supply control toner image by the exposure portion after exchange of the photosensitive member on the basis of first information and second information. The first information is a detection result when a first control toner image, formed before an exchange of the photosensitive member, is detected by the sensor, and the second information is a detection result when a second control toner image, formed after the exchange of the photosensitive member, is detected by the sensor.

主权项

1. An image forming apparatus comprising:
a photosensitive member; an exposure portion configured to expose said photosensitive member to light to form an electrostatic image; a developing portion configured to develop the electrostatic image on said photosensitive member with a developer containing a toner and a carrier; wherein each of said photosensitive member and said developing portion is configured to be independently exchangeable, a sensor configured to detect a toner image formed by said developing portion to output density information depending on a toner amount per unit area; a supply portion configured to supply the developer to said developing portion; a controller configured to control a supplying operation of said supply portion on the basis of a detection result, detected by said sensor, of a supply control toner image formed by said exposure portion; a storing portion configured to store the detection result detected by said sensor; and an exchange detecting portion configured to detect information for discriminating exchange of said photosensitive member, wherein said controller is configured to execute an operation in a mode, in which said controller adjusts an exposure condition for forming the supply control toner image by the exposure portion after exchange of said photosensitive member on the basis of first information and second information, and wherein the first information is stored in said storing portion and is a detection result when a first control toner image, formed before the exchange of the photosensitive member, is detected by said sensor, and the second information is a detection result when a second control toner image, formed after the exchange of said photosensitive member, is detected by said sensor.