Thin film transistor, method of recovering performance of the same, and liquid crystal display employing the same
AssigneeSamsung Electronics Co., Ltd.
InventorsTae-Hyung Hwang, Hyung-Il Jeon, Nikulin Ivan
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Abstract
A method of compensating performance of a thin film transistor including a gate electrode, source and drain electrodes that are spaced apart from each other and insulated from the gate electrode, and an active layer to form a channel between the source and drain electrodes, includes applying a negative voltage to the gate electrode to compensate deterioration of the active layer.
Claims18
A method of compensating for performance deterioration of a thin film transistor for a display apparatus, which comprises a gate electrode, a source electrode and a drain electrode that are spaced apart from each other and insulated from the gate electrode, an active layer to form a channel between the source electrode and the drain electrode, and an annealing electrode insulated from the gate electrode, the method comprising:
- receiving a termination signal in response to the display apparatus being powered off;
- in response to the termination signal, applying a second negative voltage to the annealing electrode, thereby applying a first negative voltage in a range of −30 V to −50 V to the gate electrode to compensate for performance deterioration of the active layer.
A thin film transistor for a display device, comprising:
- an annealing electrode on an insulating substrate;
- a gate electrode insulated from and overlapping with the annealing electrode;
- a source electrode and a drain electrode insulated from the gate electrode, the source electrode being spaced apart from the drain electrode;
- and
- an active layer that forms a channel between the source electrode and the drain electrode,
- wherein the annealing electrode is configured to receive a second negative voltage to compensate for performance deterioration of the active layer in response to the display apparatus being powered off.
A liquid crystal display, comprising:
- a liquid crystal panel;
- a gate driving circuit on the liquid crystal display panel, the gate driving circuit comprising at least one thin film transistor, the thin film transistor comprising:
- an annealing electrode on an insulating substrate,
- a gate electrode insulated from and overlapping with the annealing electrode,
- a source electrode and a drain electrode spaced apart from each other and insulated from the gate electrode, and
- an active layer that forms a channel between the source electrode and the drain electrode;
- and
- a negative voltage applier to apply a second negative voltage to the annealing electrode, wherein the annealing electrode is configured to receive the second negative voltage in response to a termination signal to turn off the liquid crystal display.
Dependencies are inferred from the claim text.