Patent ID: 7768506

Claim:
A gate driving device, adapted for a display panel, comprising: a control circuit, receiving and outputting a plurality of logic control signals, comprising: a flip-flop circuit, an input terminal of the flip-flop circuit receiving a logic high level, a clock terminal of the flip-flop circuit receiving an activate pulse signal, a clear terminal receiving a reset signal, an output terminal of the flip-flop circuit outputting a selective signal; and a multiplexer, comprising a plurality of signal input terminals, a selective terminal and a signal output terminal, one of the signal input terminals receiving a logic-low level signal, one of the signal input terminals receiving the activate pulse signal, the selective terminal receiving the selective signal, the signal output terminal outputting a data signal generated according to statuses of the logic-low level signal, the activate pulse signal, and the selective signal; a shift register circuit coupled to the control circuit, receiving the data signal and a clock signal of the logic control signals, and sequentially outputting a first number of first horizontal voltage pulse signals; a voltage level shifter, receiving and transforming the first number of the first horizontal voltage pulse signals into a first number of second voltage output signals; a high-voltage buffer block coupled to the voltage level shifter, receiving the first number of the second voltage output signals to buffer a driving for the display panel; and a current overdrive protection circuit coupled to the control circuit and the shift register circuit, receiving an output enable signal which is among one of the logic control signals and a plurality of a second number of the first horizontal voltage pulse signals which are among the first number of the first horizontal voltage pulse signals, and outputting a reset signal while being triggered to prevent generation of a sudden current spike.