| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a stable light quantity control device wherein a light quantity of emission light is not varied even when a power source voltage is varied in terms of a multi-beam image drawing/recording apparatus. SOLUTION: A main CPU 10 transmits data for controlling a current to be applied to an LED 1 to a light quantity control substrate 20, the data being formed based on an inputted desired light quantity, then the current corresponding to the desired light quantity is allowed to flow in the LED 1 through a transistor 25 provided between the light quantity control substrate 20 and LED 1. A voltage value of a power source for energizing the LED 1 is not varied.</p> |
