| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of forming an image having a proper density without regard to the operated situation of the apparatus and the situation of the apparatus left neglected. SOLUTION: The density of a toner in a developer contained in a developer container 4a is detected by a toner density sensor 14. A control means 15 controls the supply of the toner to the developer container 4a so that the density of the toner detected by the toner density sensor 14 may assume a predetermined target value. When the last developing operation is performed at an ordinary speed, whereafter next developing operation is performed at a low speed, a toner image of predetermined density is formed, and the density of this toner image is detected by an image density sensor 13. The control means 15 determines an amount of toner supply by the use of the target value corrected on the basis of the detection output of the image density sensor 13, and the detection output of the toner density sensor 14. COPYRIGHT: (C)2004,JPO |
