| 摘要 |
A power supply device is provided to prevent a display part from being dimmed by firstly activating a controller and then activating an inverter through the application of a PWM(Pulse Width Modulation) signal. The first delay circuit part(306) outputs the second high signal after receiving the power source voltage and the first high signal when the power supply unit is initially turned on. The first delay circuit part applies a driving voltage and the fifth high signal to an inverter(312). In case of receiving the first low/high signal while the first high signal is being applied, the first delay circuit part outputs the second low/high signal corresponding to the first low/high signal and then applies a reset signal corresponding to the second low/high signal to the inverter. The second delay circuit part(308) applies the fourth high signal after a predetermined time from the time when receiving the power source voltage. |
