A display device including a first voltage generator, a second voltage generator, a timing controller, a level shifter and a display panel is provided. The first voltage generator is configured to generate a gate high voltage. During a first period, the gate high voltage is a first voltage. After the first period, the gate high voltage is a second voltage. The first voltage is higher than the second voltage. The second voltage generator is configured to generate a gate low voltage. According to the gate high voltage and the gate low voltage, the level shifter shifts the voltage levels of the start signal, the clock signal and the inverse signal produced by the timing controller for driving a plurality of shift registers disposed on a substrate of the display panel. The shift registers is configured to output scanning signals in sequence.