Patent ID: 8164559

Claim:
A display device comprising: a display panel in which a gate lines are formed; and a gate driving circuit which is connected to the gate lines and outputs a gate signal, wherein the gate driving circuit comprises: a first stage; a second stage electrically coupled to the first stage; and a third stage electrically coupled to the second stage, and wherein the second stage comprises: a driving controller which generates a first control signal and a second control signal upon receiving gate signals applied from the first stage and the third stage; a driver which outputs a gate signal of a high level according to the first control signal and the second control signal; a sustain part comprising at least one sustain transistor for sustaining a gate-off voltage of the driver after the gate signal is outputted from the driver; and a controller for controlling a threshold voltage of the sustain transistor, wherein the controller comprises: an input transistor configured to output a gate signal outputted from the first stage to a predetermined third node; a third capacitor which is connected between the third node and a base voltage source terminal to which a gate off voltage is to be applied; and an output transistor comprising an input terminal to which the gate signal outputted from the first stage is to be inputted, a control terminal to which a gate signal from the third stage is to be inputted, and an output terminal which is connected to the third node.