WRITE DRIVE CONTROLLER, WRITE DRIVE CONTROL METHOD, OPTICAL WRITE DEVICE, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To reduce an exposure amount of a photoreceptor when an optical write device writing an image on the photoreceptor by scanning an optical beam performs an initialization operation.SOLUTION: A light source control unit 112 increases a drive current Iop of an LD 111a from a threshold current Ith step by step and controls a PD 111b to detect a light volume. A current value Iop1 when a detected value of the PD 111b is equal to a predetermined value Pand a current value Iop2 when the detected value is equal to a predetermined value Pare acquired, and drive current-to-light volume characteristics are acquired as linearity of passing through two points of the current values. Pand Pare values smaller than a light volume Pat a conventional initialization operation. After an acquisition process in an initialization operation, second and the following acquisition processes are performed in one-line cycles. In the second and the following acquisition processes, a light volume value Pat a center of a good linearity area is used.