| 摘要 |
PURPOSE:To prolong the life of a photosensitive body by providing a storage means which integrates and stores the rotating time of the photosensitive body and an exposure voltage control means which increases the input voltage of the exposing lamp for the photosensitive body in accordance with the increase of the rotating time which is stored in the storage means. CONSTITUTION:When an image forming device is actuated and the photosensitive body is rotated, a CPU 28 fetches the on-time of a driving circuit 32 for rotating the photosensitive body through an I/O 29 and integrates and stores the on-time in the memory 26a of a RAM 26. The CPU 28 reads out data from a ROM 27 and the RAM 26 and outputs exposure voltage in accordance with the stored rotating time to a control part 22 through the I/O 29. Then, the relation of the rotating time and the appropriate exposure voltage of the exposing lamp 21 is set, and the exposure voltage is increased according to the increase of the rotating time which is integrated and stored based on the set relation. Thus, the time till the exchange of the photosensitive body 30 is put off. |
