LIGHT INTENSITY CONTROLLER

PROBLEM TO BE SOLVED: To control the intensity of a plurality of light beams by means of a simple structure. SOLUTION: light intensity is controlled by sequentially turning on 32 LDs including eight LDs for each color of YMCK. An APC turn-on beam switching means 62 generates and outputs an APC turn-on beam changeover signal made up of a pulse signal for each LD. A color group selection means 64 selects a light beam corresponding to each color from a plurality of luminous points of a light source and outputs a color group selection signal to select the sequence of turning on APC during the control of light intensity. A reference signal generation means 66 counts APC turn-on beam switching signals input and outputs the value of reference voltage of a corresponding color by switching a zero selector 80. A light intensity control circuit 52 obtains a reference voltage in which the value of a reference voltage for each color input is converted to an analog signal and performs light intensity control by the reference voltage and the voltage of the output signal of a light intensity sensing sensor 44. COPYRIGHT: (C)2007,JPO&INPIT