| 摘要 |
PROBLEM TO BE SOLVED: To control photoreceptor surface potential to the desired target potential value in a short time, without being influenced by irregularity of sensitivity of a photoreceptor, and with respect to the sustenance change or the environmental change. SOLUTION: The exposure control factor β is determined by the next formula. β=(LP2-LP1)/(V12-V11). In the formula, LP1 is a first razor light emitting quantity, LP2 is a second razor emitting quantity V11 is the photoreceptor surface potential by the first razor emitting quantity and V12 is the photoreceptor surface potential by the second razor emitting quantity. This βis a matter that takes the irregularity of sensitivity of the photoreceptor, the sustenance change and the environmental change into consideration, and the light emitting quantity capable of attaining the target drum potential is determined by limited repeating control frequency be applying the same. |
