IP Library Granted Patent US 12,087,198
Granted Patent B2
US 12,087,198 · App. 18/342,953 · Granted Sep 10, 2024

Shift register, gate driving circuit, display apparatus and driving method

Inventors: Xuehuan Feng (Beijing, CN); Yongqian Li (Beijing, CN)
Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd.
G09G3/20G11C19/28G09G2310/0267G09G2310/0286G09G2310/061
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Quick Facts
Patent No.
US 12,087,198
App. No.
18/342,953
Granted
Sep 10, 2024
Kind
B2
Abstract

Disclosed is a shift register, a gate driving circuit, a display apparatus and a driving method, the shift register including a first input sub-circuit, configured to receive a first input signal from a first input terminal and output an output blanking output control signal; a second input sub-circuit, configured to receive a second input signal from a second input terminal and output a display output control signal; a selection sub-circuit, having a first terminal connected to the second input sub-circuit, a second terminal connected to the first input sub-circuit, and a third terminal connected to a first node, configured to control a potential of the first node according to the display output control signal and the blanking output control signal; an output sub-circuit, configured to output a composite output signal via an output terminal under control of a first node.

Claims (56)

1. A shift register, comprising:

a first input sub-circuit, configured to receive a first input signal from a first input terminal and output a blanking output control signal;

a second input sub-circuit, configured to receive a second input signal from a second input terminal and output a display output control signal, wherein the second input signal is a turn-on signal of a high level; and

an output sub-circuit, configured to output an output signal under control of a first node,

wherein the second input sub-circuit comprises a first display input transistor and a second display input transistor, and an electrode of the first display input transistor is connected to an electrode of the second display input transistor,

wherein a first electrode of the first display input transistor is connected to a high level signal line, a control electrode of the first display input transistor is connected to a display input signal line or an output terminal of another shift register, and a second electrode of the first display input transistor is connected to an electrode of the second display input transistor.

2. The shift register according to claim 1 , wherein a first electrode of the second display input transistor and a control electrode of the second display input transistor are connected with each other.

3. The shift register according to claim 1 , wherein the second display input transistor is connected in series between the first display input transistor and a pull-up node.

4. The shift register according to claim 1 , wherein a first electrode of the second display input transistor and a control electrode of the second display input transistor are configured to receive the turn-on signal of a high level, and a second electrode of the second display input transistor are connected to a first pull-up node.

5. The shift register according to claim 1 , wherein a high voltage signal input by the second display input transistor and a high voltage signal input by the first display input transistor have different potentials.

6. The shift register according to claim 1 , wherein a potential of a high voltage signal input by the second display input transistor is lower than a potential of a high voltage signal input by the first display input transistor.

7. The shift register according to claim 1 , further comprising: a display reset sub-circuit, configured to reset the first node under control of a display reset control signal.

8. The shift register according to claim 1 , wherein the output sub-circuit comprises at least one shift signal output terminal and at least one pixel signal output terminal.

9. The shift register according to claim 8 , further comprising:

a pull-down control sub-circuit, configured to control a potential of a pull-down node according to the first node; and

a pull-down sub-circuit, configured to pull down the first node and the output terminal to a non-operating potential under control of the pull-down node.

10. The shift register according to claim 1 , wherein the first input sub-circuit comprises:

a charging sub-circuit, configured to input the first input signal to a blanking pull-up control node according to the first input signal;

a storing sub-circuit, having a terminal connected to the blanking pull-up control node, configured to store a blanking pull-up control signal according to the first input signal; and

an isolating sub-circuit, configured to input the blanking output control signal to the first node according to the blanking pull-up control signal.

11. The shift register according to claim 10 , wherein the charging sub-circuit comprises a charging transistor, having a first electrode and/or control electrode connected to the first input terminal, and a second electrode connected to the blanking pull-up control node; and

the storing sub-circuit comprises a first capacitor, having a first terminal connected to the blanking pull-up control node; and the isolating sub-circuit comprises a first isolating transistor, wherein a control terminal of the first isolating transistor is connected to the blanking pull-up control node, and an electrode of the first isolating transistor is connected to the output terminal of the first input sub-circuit.

12. The shift register according to claim 10 , wherein the output sub-circuit comprises an output transistor and an output capacitor, wherein a first electrode of the output transistor is connected to an output clock signal line, a second electrode of the output transistor is connected to the output terminal, a control electrode of the output transistor is connected to the first node, a first terminal of the output capacitor is connected to the first node, and a second terminal of the output capacitor is connected the output terminal.

13. The shift register according to claim 7 , wherein the display reset sub-circuit comprises a display reset transistor, having a first electrode connected to the first node, a control electrode connected to a display reset control terminal, and a second electrode connected to a display reset signal line.

14. The shift register according to claim 11 , wherein a first terminal of the first capacitor is connected to the blanking pull-up control node, and a second terminal of the first capacitor is configured to receive a constant voltage value.

15. The shift register according to claim 11 , wherein another electrode of the first isolating transistor is connected to a terminal of the first capacitor for receiving the same signal.

16. The shift register according to claim 9 , wherein the pull-down sub-circuit comprises:

a second pull-down transistor, having a first electrode connected to a first output terminal, a second electrode connected to a sixth signal line and a control electrode connected to the pull-down node; and

a third pull-down transistor, having a first electrode connected to a second output terminal, a second electrode connected to a seventh signal line, and a control electrode connected to the pull-down node,

wherein the first output terminal is used as a shift driving signal of a gate driving circuit, and a signal outputted by the second output terminal is used as a driving signal of a pixel circuit.

17. The shift register according to claim 16 , wherein the sixth signal line and the seventh signal line are different signal line.

18. The shift register according to claim 17 , wherein the pull-down control sub-circuit comprises a pull-down control transistor having an electrode connected to a first signal line.

19. A shift register, comprising:

a first input sub-circuit, configured to receive a first input signal from a first input terminal and output a blanking output control signal;

a second input sub-circuit, configured to receive a second input signal from a second input terminal and output a display output control signal, wherein the second input signal is a turn-on signal of a high level;

an output sub-circuit, configured to output an output signal via an output terminal under control of a first node;

a display reset sub-circuit, configured to reset the first node under control of a display reset control signal;

a pull-down control sub-circuit, configured to control a potential of a pull-down node according to the first node; and

a pull-down sub-circuit, configured to pull down the first node and the output terminal to a non-operating potential under control of the pull-down node, and comprising a pull-down control transistor having an electrode connected to a first signal line,

wherein,

the first input sub-circuit comprises a charging sub-circuit, a storing sub-circuit, and an isolating sub-circuit, wherein

the charging sub-circuit comprises a charging transistor, having a first electrode and/or control electrode connected to the first input terminal, and a second electrode connected to a blanking pull-up control node;

the storing sub-circuit comprises a first capacitor, having a first terminal connected to the blanking pull-up control node; and

the isolating sub-circuit comprises a first isolating transistor, wherein a control terminal of the first isolating transistor is connected to the blanking pull-up control node, and an electrode of the first isolating transistor is connected to the output terminal of the first input sub-circuit;

the second input sub-circuit comprises:

a display input transistor, wherein a first electrode of the display input transistor and a control electrode of the display input transistor are connected with each other, and a second electrode of the display input transistor is connected to a first pull-up node;

the output sub-circuit comprises:

a first output transistor, wherein a first electrode of the first output transistor is connected to a fourth clock signal line, a second electrode of the first output transistor is connected to a first output terminal, and a control electrode of the first output transistor is connected to the first pull-up node; and

an output capacitor, wherein a first electrode of the output capacitor is connected to the first pull-up node, and a second electrode of the output capacitor is connected to the first output terminal.

20. A driving method applicable to the shift register according to claim 1 , comprising:

a display period of time of a frame, comprising:

in a first control phase, inputting, by the first input sub-circuit, a first pull-up signal to the first node; and

in a first output phase, outputting, by the output sub-circuit, a first output signal under control of the first node; and

a blanking period of time of the frame, comprising:

in a second control phase, inputting, by the second input sub-circuit, a second pull-up signal to the first node; and

in a second output phase, outputting, by the output sub-circuit, a second output signal under control of the first node.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 28, 2023
From: FENG, XUEHUAN; LI, YONGQIAN
To: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.; BOE TECHNOLOGY GROUP CO., LTD.
Reel/Frame 064096/0792 →
Priority Claims (1)
CN 201810151876.4 · Feb 14, 2018 · national
Continuity (3)
Continuation 17880790 · Aug 4, 2022
Continuation 16478395
Related Publication 20230343264A1 · Oct 26, 2023
Cited By (1)
US 50,938