Data voltage storage circuit, method for driving the same, liquid crystal display panel, and display device

Patent metadata

Field	Value
Publication number	US-10573262-B2
Application number	US-201815934060-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Sep 20, 2017
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

The disclosure discloses a data voltage storage circuit, a method for driving the same, a liquid crystal display, and a display device, and the data voltage storage circuit includes a voltage input subcircuit, a storage control subcircuit, and an output control subcircuit; and the storage control subcircuit stores a data signal input to the first node, so that the data signal can be stored for a long period of time. The three subcircuits above cooperate with each other so that a signal output end can be provided with a signal of a second reference voltage signal end or a common voltage signal end using the simple structure to thereby lower the difficulty of a fabrication process thereof, narrow a space to be occupied by the circuit, and improve a pixel aperture ratio.

First claim

The invention claimed is:

1. A data voltage storage circuit, comprising a voltage input subcircuit, a storage control subcircuit, and an output control subcircuit, wherein:
the voltage input subcircuit is coupled respectively to a scan signal end, a data signal end and a first node, and is configured to provide the first node with a data signal of the data signal end under control of the scan signal end;
the storage control subcircuit is coupled to the first node and a first reference voltage signal end, and is configured to stabilize voltage of the first node; and
the output control subcircuit is coupled respectively to a second reference voltage signal end, a common voltage signal end, the first node and a signal output end of the data voltage storage circuit, and is configured to provide the signal output end of the data voltage storage circuit with the signal of the second reference voltage signal end and a signal of the common voltage signal end respectively at different periods of time, under joint control of the second reference voltage signal end and a signal of the first node, wherein voltage of the signal of the second reference voltage signal end is fixed.

2. The data voltage storage circuit according to claim 1 , wherein the storage control subcircuit comprises a storage capacitor; and
the storage capacitor has a first end coupled to the first node, and a second end coupled to the first reference voltage signal end.

3. The data voltage storage circuit according to claim 1 , wherein the output control subcircuit comprises a first switch transistor, a second switch transistor, and a third switch transistor;
the first switch transistor has a control electrode coupled to the first node, a first electrode coupled to the second reference voltage signal end, and a second electrode coupled to a first electrode of the third switch transistor;
the second switch transistor has a control electrode coupled to the first node, a first electrode coupled to the common voltage signal end, and a second electrode coupled to a first electrode of the third switch transistor; and
the third switch transistor has a control electrode coupled to the second reference voltage signal end, and a second electrode coupled to the signal output end.

4. The data voltage storage circuit according to claim 3 , wherein the first switch transistor is an N-type switch transistor, and the second switch transistor is a P-type switch transistor; or
the first switch transistor is a P-type switch transistor, and the second switch transistor is an N-type switch transistor.

5. The data voltage storage circuit according to claim 3 , wherein the output control subcircuit further comprises a fourth switch transistor; and
the fourth switch transistor has a control electrode coupled to the scan signal end, a first electrode coupled to the second electrode of the first switch transistor, and a second electrode coupled to the signal output end of the data voltage storage circuit.

6. The data voltage storage circuit according to claim 1 , wherein the voltage input subcircuit comprises a fifth switch transistor; and
the fifth switch transistor has a control electrode coupled to the scan signal end, a first electrode coupled to the data signal end, and a second electrode coupled to the first node.

7. The data voltage storage circuit according to claim 1 , wherein the first reference voltage signal end is the same signal end as the common voltage signal end.

8. A method for driving the data voltage storage circuit according to claim 1 , the method comprising:
providing, by the voltage input subcircuit, the first node with the data signal of the data signal end under control of the scan signal end; stabilizing, by the storage control subcircuit, the voltage of the first node; and providing, by the output control subcircuit, the signal output end of the data voltage storage circuit with the signal of the second reference voltage signal end and the signal of the common voltage signal end respectively at the different periods of time, under joint control of the second reference voltage signal end and a signal of the first node.

9. A liquid crystal display panel, comprising a data voltage storage circuit, the data voltage storage circuit comprising a voltage input subcircuit, a storage control subcircuit, and an output control subcircuit, wherein:
the voltage input subcircuit is coupled respectively to a scan signal end, a data signal end and a first node, and is configured to provide the first node with a data signal of the data signal end under control of the scan signal end;
the storage control subcircuit is coupled to the first node and a first reference voltage signal end, and is configured to stabilize voltage of the first node; and
the output control subcircuit is coupled respectively to a second reference voltage signal end, a common voltage signal end, the first node and a signal output end of the data voltage storage circuit, and is configured to provide the signal output end of the data voltage storage circuit with the signal of the second reference voltage signal end and a signal of the common voltage signal end respectively at different periods of time, under joint control of the second reference voltage signal end and a signal of the first node, wherein voltage of the signal of the second reference voltage signal end is fixed.

10. The liquid crystal display panel according to claim 9 , wherein the liquid crystal display panel comprises an array substrate and an opposite substrate arranged opposite to the array substrate, and a liquid crystal layer located between the array substrate and the opposite substrate, wherein the array substrate comprises pixels in a plurality of colors, a first reference voltage signal line, a second reference voltage signal line, a common voltage signal line, a plurality of gate lines, and a plurality of data lines; and the first reference voltage signal line, the second reference voltage signal line, the common voltage signal line, the plurality of gate lines, and the plurality of data lines are arranged insulated from each other; and
each pixel in the plurality of colors comprises the data voltage storage circuit and a pixel electrode, wherein the scan signal end of the data voltage storage circuit is electrically coupled to corresponding one of the gate lines, the data signal end is electrically coupled to corresponding one of the data lines, the first reference voltage signal end is electrically coupled to the first reference voltage signal line, the second reference voltage signal end is electrically coupled to the second reference voltage signal line, and the common voltage signal end is electrically coupled to the common voltage signal line.

11. The liquid crystal display panel according to claim 10 , wherein the first reference voltage signal line, the second reference voltage signal line, the common voltage signal line, and the plurality of gate lines are made of the same material, and arranged on the same layer.

12. The liquid crystal display panel according to claim 11 , wherein the first reference voltage signal line, the second reference voltage signal line, the common voltage signal line, and the plurality of gate lines extend respectively along a row direction of the pixels in the plurality of colors.

13. The liquid crystal display panel according to claim 10 , wherein the first reference voltage signal line, the second reference voltage signal line, the common voltage signal line, and the plurality of data lines are made of the same material, and arranged on the same layer.

14. The liquid crystal display panel according to

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Chen Yimin
• Shao Xianjie
• Wang Xiujuan
• Wang Zhangmeng

Classifications

• G09G3/364 Primary

  with use of subpixels · CPC title

• G09G3/3648 Primary

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2300/0857

  Static memory circuit, e.g. flip-flop · CPC title