| 摘要 |
An image forming apparatus includes a developing unit for toner-developing a latent image formed on a photoreceptor, and a dual-component developer consisting of carrier particles and toner particles is contained in the developing unit. A toner concentration in the developing unit is sensed by a magnetic sensor. An output voltage of the magnetic sensor is applied to a microcomputer through an analog-to-digital converter. The microcomputer sets a toner supply time in accordance with a fuzzy inference based on the output voltage of the magnetic sensor and a change amount of the output voltage of the magnetic sensor. A toner supply motor is driven for the set time. Consequently, the toner supply roller supplies toner particles to the developing unit from a toner box. |
