| 摘要 |
<p>PURPOSE:To extend a service life of a light emission diode array by constituting the device so that the light emission time of a light emission diode element does not become partial to some light emission diodes. CONSTITUTION:A light emission diode array 3 moves in the rotation axis direction of a photosensitive body 1 by a rotation of a position control motor 4, and a moving amount at the time when the light emission diode array 3 has been moved is measured by a position detecting sensor 7. This moving amount is fed back to a light emission diode array control driver 5 through a position correcting circuit 6, and a lighting place of a light emission diode is corrected. In such a way, a position of the light emission diode array is shifted in the rotation axis direction of the photosensitive body, and write of a frame line is shared with other light emission diode element, as well. In such a way, a long service life of the light emission diode array can be realized.</p> |
