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US 10,380,929 B2Granted
GOA drive unit and GOA drive circuit
AssigneeWuhan China Star Optoelectronics Technology Co., Ltd.
InventorWeixin Ma
Life of this patent
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Abstract
Disclosed are a GOA drive unit and a GOA drive circuit. The GOA drive unit includes a bidirectional selection unit. The bidirectional selection unit is activated under an action of a first control signal and a second control signal which are complementary to each other in timing sequence, and outputs a first selection signal. The bidirectional selection unit is activated under an action of a third control signal and a fourth control signal which are complementary to each other in timing sequence, and outputs a second selection signal. The GOA drive unit can reduce the influence of stress and improve the reliability of the GOA drive circuit.
Claims12
A GOA drive unit, comprising a bidirectional selection unit which is used to transmit a selection signal for controlling a scanning direction of the GOA drive unit, and is configured to:
- receive a first control signal and a second control signal, which enable the bidirectional selection unit to be in an active state in a first timing sequence and a second timing sequence, respectively, and to output a first selection signal for controlling forward scanning of the GOA drive unit, wherein the first timing sequence and the second timing sequence are complementary to each other;
- and
- receive a third control signal and a fourth control signal, which enable the bidirectional selection unit to be in an active state in a third timing sequence and a fourth timing sequence, respectively, and to output a second selection signal for controlling backward scanning of the GOA drive unit, wherein the third timing sequence and the fourth timing sequence are complementary to each other;
- wherein the bidirectional selection unit comprises a first switching element,
- wherein in the forward scanning, as for the first switching element, its signal input end receives the first selection signal;
- its first control end receives the first control signal;
- its second control end receives the second control signal;
- and its signal output end outputs the first selection signal under an action of the first control signal and the second control signal;
- and
- wherein in the backward scanning, as for the first switching element, its signal input end receives the second selection signal;
- its first control end receives the third control signal;
- its second control end receives the fourth control signal;
- and its signal output end outputs the second selection signal under an action of the third control signal and the fourth control signal;
- wherein the first switching element comprises a first thin film transistor and a second thin film transistor, a source and a drain of the first thin film transistor being correspondingly connected to a source and a drain of the second thin film transistor, respectively;
- a gate of the first thin film transistor receives the first control signal or the third control signal, and a grid of the second thin film transistor receives the second control signal or the fourth control signal;
- and
- the sources of the first thin film transistor and the second thin film transistor serve as the signal input end of the first switching element, and the drains of the first thin film transistor and the second thin film transistor serve as the signal output end of the first switching element;
- wherein the first thin film transistor and the second thin film transistor are both N-type thin film transistors;
- or the first thin film transistor and the second thin film transistor are both P-type thin film transistors;
- wherein the bidirectional selection unit is continuously in the active state to continuously output the first selection signal, by the first thin film transistor and the second thin film transistor being turned on alternately, corresponding to the first selection signal and the second selection signal;
- wherein the bidirectional selection unit is continuously in the active state to continuously output the second selection signal, by the first thin film transistor and the second thin film transistor being turned on alternately, corresponding to the third selection signal and the fourth selection signal.
18 more elements
A GOA drive circuit, which comprises cascaded GOA drive units,
- wherein the GOA drive circuit comprises a bidirectional selection unit which is used to transmit a selection signal for controlling a scanning direction of the GOA drive unit and is configured to:
- receive a first control signal and a second control signal, which enable the bidirectional selection unit to be in an active state in a first timing sequence and a second timing sequence, respectively, and to output a first selection signal for controlling forward scanning of the GOA drive unit, wherein the first timing sequence and the second timing sequence are complementary to each other;
- and
- receive a third control signal and a fourth control signal, which enable the bidirectional selection unit to be in an active state in a third timing sequence and a fourth timing sequence, respectively, and to output a second selection signal for controlling backward scanning of the GOA drive unit, wherein the third timing sequence and the fourth timing sequence are complementary to each other;
- wherein the bidirectional selection unit comprises a first switching element,
- wherein in the forward scanning, as for the first switching element, its signal input end receives the first selection signal;
- its first control end receives the first control signal;
- its second control end receives the second control signal;
- and its signal output end outputs the first selection signal under an action of the first control signal and the second control signal;
- and
- wherein in the backward scanning, as for the first switching element, its signal input end receives the second selection signal;
- its first control end receives the third control signal;
- its second control end receives the fourth control signal;
- and its signal output end outputs the second selection signal under an action of the third control signal and the fourth control signal;
- wherein the first switching element comprises a first thin film transistor and a second thin film transistor, a source and a drain of the first thin film transistor being correspondingly connected to a source and a drain of the second thin film transistor, respectively;
- a gate of the first thin film transistor receives the first control signal or the third control signal, and a gate of the second thin film transistor receives the second control signal or the fourth control signal;
- and
- the sources of the first thin film transistor and the second thin film transistor serve as the signal input end of the first switching element, and the drains of the first thin film transistor and the second thin film transistor serve as the signal output end of the first switching element;
- wherein the first thin film transistor and the second thin film transistor are both N-type thin film transistors;
- or the first thin film transistor and the second thin film transistor are both P-type thin film transistors;
- wherein the bidirectional selection unit is continuously in the active state to continuously output the first selection signal, by the first thin film transistor and the second thin film transistor being turned on alternately, corresponding to the first selection signal and the second selection signal;
- wherein the bidirectional selection unit is continuously in the active state to continuously output the second selection signal, by the first thin film transistor and the second thin film transistor being turned on alternately, corresponding to the third selection signal and the fourth selection signal.
19 more elements
Dependencies are inferred from the claim text.