Gate driving unit, driving method thereof, gate driving circuit and display device

Patent metadata

Field	Value
Publication number	US-11114004-B2
Application number	US-201816094615-A
Country	US
Kind code	B2
Filing date	Mar 14, 2018
Priority date	Apr 21, 2017
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

The present disclosure provides a gate driving unit, a driving method thereof, a gate driving circuit and a display device. The gate driving unit includes an input resetting module, a storage module, a pull-up node control module, a pull-down node control module and an output module. The gate driving unit further includes a clock signal control module, connected to a first control signal end, a second control signal end, a first reference clock signal end, a second reference clock signal end, a first clock signal end and a second clock signal end, and configured to, under the control of a first control signal from the first control signal end and a second control signal from the second control signal end, output clock signals at a same frequency and in opposite phases to the first clock signal end and the second clock signal end respectively in accordance with a first reference clock signal from the first reference clock signal end and a second reference clock signal from the second reference clock signal.

First claim

What is claimed is:

1. A gate driving unit, comprising an input resetting module, a storage module, a pull-up node control module, a pull-down node control module and an output module, wherein
the input resetting module is connected to a pull-up node, the pull-up node control module is connected to a pull-down node and the pull-up node, and the storage module is connected to the pull-up node and a gate driving signal output end;
the pull-down node control module is connected to a first clock signal end, the pull-up node and the pull-down node, and configured to control the pull-down node to be electrically connected to the first clock signal end when a potential at the pull-up node is a first level and a second level is applied to the first clock signal end;
the output module is connected to the pull-up node, the pull-down node, a second clock signal end and the gate driving signal output end, and configured to control the gate driving signal output end to be electrically connected to the second clock signal end when the potential at the pull-up node is a second level; and
the gate driving unit further comprises a clock signal control module connected to a first control signal end, a second control signal end, a first reference clock signal end, a second reference clock signal end, the first clock signal end and the second clock signal end, and configured to, under the control of a first control signal from the first control signal end and a second control signal from the second control signal end, output clock signals at a same frequency and in opposite phases to the first clock signal end and the second clock signal end at the same time respectively in accordance with a first reference clock signal from the first reference clock signal end and a second reference clock signal from the second reference clock signal end.

2. The gate driving unit according to claim 1 , wherein the first reference clock signal and the second reference clock signal are at a same frequency and in opposite phases.

3. The gate driving unit according to claim 1 , wherein the clock signal control module comprises:
a first switching transistor, a gate electrode of which is connected to the first control signal end, a first electrode of which is connected to the first reference clock signal end, and a second electrode of which is connected to the first clock signal end;
a second switching transistor, a gate electrode of which is connected to the second control signal end, a first electrode of which is connected to the first clock signal end, and a second electrode of which is connected to the second reference clock signal end;
a third switching transistor, a gate electrode of which is connected to the first control signal end, a first electrode of which is connected to the second reference clock signal end, and a second electrode of which is connected to the second clock signal end; and
a fourth switching transistor, a gate electrode of which is connected to the second control signal end, a first electrode of which is connected to the second clock signal end, and a second electrode of which is connected to the first reference clock signal end.

4. The gate driving unit according to claim 1 , wherein the clock signal control module comprises:
a first switching transistor, a gate electrode of which is connected to the first control signal end, a first electrode of which is connected to the first reference clock signal end, and a second electrode of which is connected to the first clock signal end;
a second switching transistor, a gate electrode of which is connected to the second control signal end, a first electrode of which is connected to the first clock signal end, and a second electrode of which is connected to the second reference clock signal end; and
an inverter, an input end of which is connected to the first clock signal end, and an output end of which is connected to the second clock signal end.

5. The gate driving unit according to claim 1 , wherein the pull-down node control module is further connected to the gate driving signal output end and a first level input end, and further configured to control the pull-down node to be electrically connected to the first level input end when the potential at the pull-up node is the second level, and control the pull-down node to be electrically connected to the first level input end when the a gate driving signal from the gate driving signal output end is at the second level; and
the output module is further connected to the first level input end, and further configured to control the gate driving signal output end to be electrically connected to the first level input end when a potential at the pull-down node is the second level.

6. The gate driving unit according to claim 5 , wherein the pull-down node control module comprises:
a first pull-down node control transistor, a gate electrode of which is connected to the pull-up node, a first electrode of which is connected to the first level input end, and a second electrode of which is connected to the pull-down node;
a second pull-down node control transistor, a gate electrode of which is connected to the gate driving signal output end, a first electrode of which is connected to the pull-down node, and a second electrode of which is connected to the first level input end;
a third pull-down node control transistor, a gate electrode and a first electrode of which are connected to the first clock signal end, and a second electrode of which is connected to the pull-down node; and
a pull-down node potential maintenance capacitor, a first end of which is connected to the pull-down node, and a second end of which is connected to the first level input end.

7. The gate driving unit according to claim 5 , wherein the output module comprises:
a pull-up transistor, a gate electrode of which is connected to the pull-up node, a first electrode of which is connected to the second clock signal end, and a second electrode of which is connected to the gate driving signal output end; and
a pull-down transistor, a gate electrode of which is connected to the pull-down node, a first electrode of which is connected to the gate driving signal output end, and a second electrode of which is connected to the first level input end.

8. The gate driving unit according to claim 1 , wherein the input resetting module comprises:
an inputting transistor, a gate electrode of which is connected to an input end, a first electrode of which is connected to a first scanning level input end, and a second electrode of which is connected to the pull-up node; and
a resetting transistor, a gate electrode of which is connected to a resetting end, a first electrode of which is connected to the pull-up node, and a second electrode of which is connected to a second scanning level input end.

9. The gate driving unit according to claim 1 , wherein the storage module comprises a storage capacitor, a first end of which is connected to the pull-up node, and a second end of which is connected to the gate driving signal output end.

10. The gate driving unit according to claim 1 , wherein the pull-up node control module comprises a pull-up node control transistor, a gate electrode of which is connected to the pull-down node, a first electrode of which is connected to the pull-up node, and a second electrode of which is connected to the first level input end.

11. A method for driving the gate driving unit according to claim 1 , comprising:
at a low power consumption display stage, under the control of the first control signal and the second control signal, applying, by the clock signal control module, the first clock signal to the first clock signal input end and app

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Li Yan
• Shi Lingyun
• Sun Wei
• Xie Xiaobo
• Jin Meiling

Classifications

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G2340/0407

  Resolution change, inclusive of the use of different resolutions for different screen areas · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2310/0286

  Details of a shift registers arranged for use in a driving circuit · CPC title

• G09G2330/023

  using energy recovery or conservation · CPC title