GOA circuit, display panel and display device
AssigneeWuhan China Star Optoelectronics Technology Co., Ltd.
InventorJian Tao
Life of this patent
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Abstract
A driving circuit, a display panel and a display device are provided. The driving circuit includes cascaded driving units. Each of the driving units comprises a pull-up control circuit, a pull-down circuit, a pull-down maintaining circuit, a bootstrap circuit, a discharging circuit and a reset circuit. Furthermore, the discharging circuit comprises a twelfth TFT and a fourteenth TFT.
Claims20
A driving circuit, comprising a plurality of cascaded driving units, each of the driving units comprising a pull-up control circuit, a pull-down circuit, a pull-down maintaining circuit, a bootstrap circuit, a discharging circuit and a reset circuit;
- wherein the pull-up control circuit is electrically connected to the pull-down circuit, the pull-down maintaining circuit, and the bootstrap circuit;
- the pull-down maintaining circuit is electrically connected to the pull-down circuit;
- the pull-down maintaining circuit, the bootstrap circuit, the discharging circuit and the reset circuit are all electrically connected to a current-stage gate driving signal output end;
- and the pull-up control circuit is electrically connected to a previous-stage gate driving signal input end;
- wherein the discharging circuit comprises:
- a twelfth thin film transistor (TFT), having a gate, a source electrically connected to a first global control signal input end, and a drain electrically connected to the current-stage gate driving signal output end;
- and
- a fourteenth TFT, having a gate electrically connected to a constant high voltage signal, a source electrically connected to the first global control signal input end, and a drain electrically connected to the gate of the twelfth TFT;
- wherein when an input signal of the first global control signal input end corresponds to a high voltage level, a voltage on the gate of the twelfth TFT is larger than a voltage level of the constant high voltage signal input end such that the discharging circuit sufficiently performs a discharging operation.
A display panel, comprising a driving circuit, the driving circuit comprising a plurality of cascaded driving units, each of the driving units comprising a pull-up control circuit, a pull-down circuit, a pull-down maintaining circuit, a bootstrap circuit, a discharging circuit and a reset circuit;
- wherein the pull-up control circuit is electrically connected to the pull-down circuit, the pull-down maintaining circuit, and the bootstrap circuit;
- the pull-down maintaining circuit is electrically connected to the pull-down circuit;
- the pull-down maintaining circuit, the bootstrap circuit, the discharging circuit and the reset circuit are all electrically connected to a current-stage gate driving signal output end;
- and the pull-up control circuit is electrically connected to a previous-stage gate driving signal input end;
- wherein the discharging circuit comprises:
- a twelfth thin film transistor (TFT), having a gate, a source electrically connected to a first global control signal input end, and a drain electrically connected to the current-stage gate driving signal output end;
- and
- a fourteenth TFT, having a gate electrically connected to a constant high voltage signal, a source electrically connected to the first global control signal input end, and a drain electrically connected to the gate of the twelfth TFT;
- wherein when an input signal of the first global control signal input end corresponds to a high voltage level, a voltage on the gate of the twelfth TFT is larger than a voltage level of the constant high voltage signal input end such that the discharging circuit sufficiently performs a discharging operation.
A display device, comprising a display panel, the display panel comprising a driving circuit, the driving circuit comprising a plurality of cascaded driving units, each of the driving units comprising a pull-up control circuit, a pull-down circuit, a pull-down maintaining circuit, a bootstrap circuit, a discharging circuit and a reset circuit;
- wherein the pull-up control circuit is electrically connected to the pull-down circuit, the pull-down maintaining circuit, and the bootstrap circuit;
- the pull-down maintaining circuit is electrically connected to the pull-down circuit;
- the pull-down maintaining circuit, the bootstrap circuit, the discharging circuit and the reset circuit are all electrically connected to a current-stage gate driving signal output end;
- and the pull-up control circuit is electrically connected to a previous-stage gate driving signal input end;
- wherein the discharging circuit comprises:
- a twelfth thin film transistor (TFT), having a gate, a source electrically connected to a first global control signal input end, and a drain electrically connected to the current-stage gate driving signal output end;
- and
- a fourteenth TFT, having a gate electrically connected to a constant high voltage signal, a source electrically connected to the first global control signal input end, and a drain electrically connected to the gate of the twelfth TFT;
- wherein when an input signal of the first global control signal input end corresponds to a high voltage level, a voltage on the gate of the twelfth TFT is larger than a voltage level of the constant high voltage signal input end such that the discharging circuit sufficiently performs a discharging operation.
Dependencies are inferred from the claim text.