| 摘要 |
An LCD(Liquid Crystal Display) inverter is provided to improve noise by gently outputting PWM(Pulse Width Modulation) output of a PWM control circuit through an electric discharging and charging circuit. An LCD inverter includes a PWM control circuit(21), a switching circuit(22), an oscillation circuit(23), and a transformer(24). The PWM control circuit(21) outputs a control signal constantly fixing the change of input voltage variation from the outside as an input signal. The switching circuit(22) is switched according to the signal outputted from the PWM control circuit(21). The oscillation circuit(23) is oscillated by the signal switched on the switching circuit(22). The transformer(24) drives a cold cathode ray tube by raising voltage by the oscillation signal outputted from the oscillation circuit(23). |
