A display system is disclosed in the present invention, which includes a low drop-out voltage regulator (LDO) for receiving an input voltage and providing a stable output voltage. The low drop-out voltage regulator includes a regulating circuit, a first switch, a current source circuit and an inverting circuit. The regulating circuit has a regulating circuit input, a regulating circuit output and a regulating circuit control terminal. The first switch selectively forms short or open circuit in accordance with ON/OFF states thereof. The current source circuit provides a fixed current to the control terminal and the output of the regulating circuit. The inverting circuit has an inverting circuit input coupled to the regulating circuit output and an inverting circuit output terminal coupled to the regulating circuit control terminal, the inverting circuit inverting the output voltage from the regulating circuit output. The regulating circuit control terminal adjusts the output voltage in accordance with a control voltage received thereof.