| 摘要 |
<p>PROBLEM TO BE SOLVED: To execute stable forming of an image by a method wherein a temperature and a humidity are monitored by an environment sensor, a drum voltage and a development property with respect to a quantity of an exposing light are predicted, and then the quantity of the exposing light is varied. SOLUTION: An SLED driving signal generator is equipped with a PWM circuit which can vary a duty of a light exposing signalϕI based on a value of the environment sensor. The PWM circuit has a means for predicting variation of the drum voltage and the development property of a photosensitive drum and can vary the duty of the light exposing signalϕI based on the result of the prediction.</p> |
