| 摘要 |
PROBLEM TO BE SOLVED: To control the rotational speed of a motor without providing an exclusive counter circuit. SOLUTION: When the surface of a photosensitive member is scanned by laser beam deflected by the rotary polyhedral mirror rotated by a motor and modulated by an image signal to form an image, the motor is controlled by using a discrimination circuit. At this time, the motor is controlled by obtaining signals setting an accelerated state, a decelerated state and a rotation holding state to the motor from a main scanning counter 1 for forming a mask signal or an unblanking signal. |
