HIGH VOLTAGE POWER SUPPLY FOR OUTPUTTING POSITIVE/NEGATIVE HIGH VOLTAGE WHICH APPLIED TO AN IMAGE FORMING APPARATUS AND A METHOD THEREOF

摘要

PURPOSE: A high voltage power supply for outputting positive/negative high voltage and a method thereof are provided to reduce the manufacturing costs by outputting positive/negative high voltage using only one input port.;CONSTITUTION: A positive high voltage output unit(110) outputs positive high voltage using a PWM(Pulse Width Modulation) signal. A negative high voltage operation controller(120) charges a predetermined amount voltage while the positive high voltage output unit outputs positive high voltage. A negative high voltage output unit(130) outputs negative high voltage using the charged voltage. A negative high voltage blocker(140) blocks the negative high voltage output while the positive high voltage output unit outputs the positive high voltage.;COPYRIGHT KIPO 2011