| 摘要 |
<p>Any reduction in the dignity of image, any increase in the waiting time, any increase in toner consumption and waste toner, etc. are prevented. A memory is provided in a developing device detachably mountable to the main body of an image forming apparatus, and a main body memory is provided in the main body. The last optimum bias stored in the memory in the developing device and the newest development bias are compared with each other (S14), and on the basis of the difference ”Di therebetween, the interval at which density detection is effected is changed. When ”Di‰¥A, the interval is shortened (S18), and when A>”Di‰¥B, the interval is not changed, and when B>”Di, the interval is lengthened. Thereby, necessary minimum density control is effected to thereby prevent any reduction in the dignity of image and any increase in the waiting time.</p> |
