| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device capable of obtaining an excellent image forming condition, without affecting high-voltage output value. SOLUTION: When a photoreceptor 1 is subjected to a corona discharge from a corona discharger 2, an output current is obtained from the surface of the photoreceptor 1. This output current is detected by current detection resistance R, a voltage obtained as the product of the resistance of the detection resistance R and a current I is fed back to the ADC 22 of a control part 21 and a PWM signal is transmitted to a switching element Q from a CNT 23, and the primary side of a transformer T is excited so as to always make the output current equal to a target value. At this time, the upper limit value of the duty of the PWM signal is corrected according to a value detected by the resistance R. |
