| 摘要 |
<p>PURPOSE:To provide a device capable of reproducing gradation satisfactorily without complicating circuit configuration and data arithmetic processing and compensating the fluctuation of sensitivity of a photoreceptor due to environmental fluctuation, etc. CONSTITUTION:This image forming device is the one equipped with means 21, 22 and 23 which generate by synchronizing the driving signal of each of LEDs 10 by applying D/A conversion to each of gradation data to instruct exposure by the LEDs 10 of an optical print head 1, means 26, 27 and 28 which generate a control signal to instruct the light output time of the LEDs 10 based on correction data to uniformalize the light output characteristic of the LEDs 10, a means 232 which outputs the driving currents of the LEDs 10, respectively, a means which detects physical quantity affecting on the sensitivity characteristic of the photoreceptor, and a means 29 which switches the amplification factor of the driving current corresponding to detected physical quantity.</p> |
