A display device including an array substrate, the array substrate including a GOA (Gate-on-Array) circuit, the GOA circuit including multiple cascaded GOA units, each GOA unit corresponds to a stage of a scanning line, and each GOA unit comprises:
- a pull-up circuit;
- a pull-up control circuit;
- a pull-down circuit;
- and
- a pull-down holding circuit;
- wherein the pull-up circuit is electrically connected to the pull-up control circuit, the pull-up control circuit provides a turning-on control signal to the pull-up circuit, the pull-up circuit outputs a scanning driving signal of a current stage to a scanning line of the current stage according to the turning-on control signal;
- wherein the pull-down circuit includes a first pull-down switch, the first pull-down switch receives a scanning driving signal of a next stage, and pulls down the scanning driving signal of the current stage to a low voltage level according to the scanning driving signal of the next stage;
- wherein the pull-down holding circuit includes a first pull-down holding switch, the first pull-down holding switch receives a pull-down holding signal, and holds the scanning driving signal of the current stage at a low voltage level according to the pull-down holding signal;
- and
- wherein each of the first pull-down switch and the first pull-down holding switch is a dual-gate TFT switch, the dual-gate TFT switch includes a bottom gate electrode and a top gate electrode, wherein the top gate electrode receives a first direct-current voltage in order to control a threshold voltage offset of the dual-gate TFT switch;
- wherein the pull-down circuit further includes a second pull-down switch, the second pull-down switch receives the scanning driving signal of the next stage, and pulls down the turning-on control signal to a low voltage level according to the scanning driving signal of the next stage;
- the pull-down holding circuit further includes a second pull-down holding switch, the second pull-down holding switch receives the pull-down holding signal, and holds the turning-on control signal at a low voltage level according to the pull-down holding signal;
- and wherein each of the second pull-down switch and the second pull-down holding switch is a dual-gate TFT switch, a top gate electrode of each of the second pull-down switch and the second pull-down holding switch also receives the first direct-current voltage;
- wherein a bottom gate electrode of each of the first pull-down switch and the second pull-down switch receives the scanning driving signal of the next stage, a top gate electrode of each of the first pull-down switch and the second pull-down switch receives the first direct-current voltage, source electrodes of the first pull-down switch and the second pull-down switch respectively receives the scanning driving signal and the turning-on control signal of the current stage, drain electrodes of the first pull-down switch and the second pull-down switch respectively receives a second direct-current voltage;
- wherein a bottom gate electrode of each of the first pull-down holding switch and the second pull-down holding switch receives the pull-down holding signal, a top gate electrode of each of the first pull-down holding switch and the second pull-down holding switch receives the first direct-current voltage, source electrodes of the first pull-down holding switch and the second pull-down holding switch respectively receives the scanning driving signal and the turning-on control signal of the current stage, and drain electrodes of the first pull-down holding switch and the second pull-down holding switch receives the second direct-current voltage;
- wherein the pull-down holding circuit further includes a third pull-down holding switch, a fourth pull-down holding switch, a fifth pull-down holding switch and a sixth pull-down holding switch;
- wherein, an input terminal of the third pull-down holding switch and an input terminal and a control terminal of the fourth pull-down holding switch receive a pull-down clock, an output terminal of the fourth pull-down holding switch is electrically connected to a control terminal of the third pull-down holding switch and an input terminal of the sixth pull-down holding switch, an output terminal of the third pull-down holding switch is electrically connected to the first pull-down holding switch, a bottom gate electrode of the second pull-down holding switch and an input terminal of the fifth pull-down holding switch;
- and
- a control terminal of the fifth pull-down holding switch and a control terminal of the sixth pull-down holding switch receive the turning-on control signal, an output terminal of the fifth pull-down holding switch and an output terminal of the sixth pull-down holding switch receive the second direct-current voltage.