CN109637483A - GOA circuit and liquid crystal display device - Google Patents
GOA circuit and liquid crystal display device Download PDFInfo
- Publication number
- CN109637483A CN109637483A CN201910059101.9A CN201910059101A CN109637483A CN 109637483 A CN109637483 A CN 109637483A CN 201910059101 A CN201910059101 A CN 201910059101A CN 109637483 A CN109637483 A CN 109637483A
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- Prior art keywords
- circuit
- pull
- goa
- electrically connected
- preliminary filling
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
A kind of GOA circuit, including multiple cascade GOA modules, each the multiple GOA module includes: pull-up control circuit, for the preliminary filling point precharge to the module；Pull-up circuit, the grid for improving the GOA module export；Pull-down circuit；Pull down holding circuit；Bootstrap capacitor is used to grid output being promoted to the first high level；And coupling circuit, for the preliminary filling point to be promoted to the second high level, second high level is higher than first high level.A kind of liquid crystal display device is also provided.
Description
Technical field
This announcement is related to field of display technology, more particularly to a kind of GOA circuit and liquid crystal display device.
Background technique
It is a kind of drive liquid crystal display device scan line technology be array substrate row drive (Gate driver On
Array, GOA) technology.GOA technology, which refers to, to be directly made in gate driving circuit in the array substrate of liquid crystal display device, because
This does not need external grid-driving integrated circuit.Since directly gate driving circuit can be made in using existing processing procedure
In array substrate, therefore manufacturing cost can be reduced and be suitable for the liquid crystal display device of narrow frame and slimming.
Existing GOA circuit includes multiple GOA modules, and each GOA module is for providing scan signal to a scan line.
The fall time (falling time) of the output waveform of GOA module be judge GOA module output waveform superiority and inferiority it is important because
Element.Shorter when fall time, GOA module faster can will be not turned on the thin film transistor (TFT) that scan line is electrically connected, and pixel is wrong
The risk filled is lower.However the problem that the fall time of the output waveform of existing GOA module is not short enough.
Therefore it needs to propose a solution to problem of the prior art.
Summary of the invention
This announcement is designed to provide a kind of GOA circuit and liquid crystal display device, can solve existing GOA module
The fall time of output waveform not short enough problem.
To solve the above problems, a kind of GOA circuit that this announcement provides includes multiple cascade GOA modules, it is each described
Multiple GOA modules include: pull-up control circuit, for the preliminary filling point precharge to the module；Pull-up circuit is electrically connected to
The pull-up control circuit and the grid output for being used to improve the GOA module；Pull-down circuit is electrically connected to the pull-up control
Circuit processed and the pull-up circuit；Holding circuit is pulled down, the pull-up control circuit, the pull-up circuit and institute are electrically connected to
State pull-down circuit；Bootstrap capacitor is electrically connected to the pull-up control circuit, the pull-up circuit, the pull-down circuit and institute
State drop-down holding circuit and for grid output to be promoted to the first high level；And coupling circuit, it is electrically connected to institute
It states pull-up control circuit, the pull-up circuit, the pull-down circuit, the drop-down holding circuit and the bootstrap capacitor and is used for
The preliminary filling point is promoted to the second high level, second high level is higher than first high level.
In an embodiment, the coupling circuit include: the first transistor, and the grid of the first transistor is electrically connected
To the preliminary filling point, the source electrode of the first transistor is electrically connected to clock signal；And first capacitor, it is electrically connected at institute
It states between the drain electrode of the first transistor and preliminary filling point.
In an embodiment, the clock signal is different from the clock signal for being input to the GOA module.
In an embodiment, the pull-down circuit is used to the preliminary filling point and grid output being pulled low to low level.
In an embodiment, the drop-down holding circuit is used to maintain the preliminary filling point and grid output described
Low level.
To solve the above problems, a kind of liquid crystal display device that this announcement provides includes: a plurality of source electrode line；A plurality of grid
Line, a plurality of source electrode line and a plurality of grid line define multiple pixels；And GOA circuit, it is electrically connected to described more
Grid line and for providing scanning signal to a plurality of grid line, the GOA circuit includes multiple cascade GOA modules,
Each the multiple GOA module includes: pull-up control circuit, for the preliminary filling point precharge to the module；Pull-up circuit, electricity
Property be connected to the pull-up control circuit and for improve the GOA module grid output；Pull-down circuit is electrically connected to institute
State pull-up control circuit and the pull-up circuit；Holding circuit is pulled down, the pull-up control circuit, the pull-up are electrically connected to
Circuit and the pull-down circuit；Bootstrap capacitor is electrically connected to the pull-up control circuit, the pull-up circuit, the drop-down
Circuit and the drop-down holding circuit are simultaneously promoted to the first high level for exporting the grid；And coupling circuit, electrically
It is connected to the pull-up control circuit, the pull-up circuit, the pull-down circuit, the drop-down holding circuit and bootstrapping electricity
Hold and be used to for the preliminary filling point being promoted to the second high level, second high level is higher than first high level.
In an embodiment, the coupling circuit include: the first transistor, and the grid of the first transistor is electrically connected
To the preliminary filling point, the source electrode of the first transistor is electrically connected to clock signal；And first capacitor, it is electrically connected at institute
It states between the drain electrode of the first transistor and preliminary filling point.
In an embodiment, the clock signal is different from the clock signal for being input to the GOA module.
In an embodiment, the pull-down circuit is used to the preliminary filling point and grid output being pulled low to low level.
In an embodiment, the drop-down holding circuit is used to maintain the preliminary filling point and grid output described
Low level.
Compared to the prior art, in the GOA circuit and liquid crystal display device of this announcement, since the coupling circuit can
(that is, second secondary coupling) is coupled again on the basis of the preliminary filling point, therefore can reduce the grid of the GOA module
The fall time of pole output, and then reduce the risk that the pixel mistake is filled.In addition, the GOA circuit of this announcement and liquid crystal display
Device can promote the level of the preliminary filling point again, and then keep the waveform of the grid output more ideal.
For the above content of this announcement can be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate institute's accompanying drawings, makees
Detailed description are as follows:
Detailed description of the invention
Fig. 1 shows the liquid crystal display device according to one embodiment of this announcement.
Fig. 2 shows the circuit diagram of a GOA module in Fig. 1.
Fig. 3 shows what the voltage curve C1 of grid output of the GOA module of this announcement and the grid of existing GOA module were exported
Voltage curve C2.
Fig. 4 shows the electricity of the voltage curve C1 ' of the preliminary filling point of the GOA module of this announcement and the preliminary filling point of existing GOA module
Buckle line C2 '.
Specific embodiment
The explanation of following embodiment is to can be used to the particular implementation of implementation to illustrate this announcement with reference to additional schema
Example.
Referring to Fig. 1, Fig. 1 shows the liquid crystal display device according to one embodiment of this announcement.
The liquid crystal display device has a viewing area 10 and a non-display area 30.The display device includes a plurality of source
Polar curve S1-SN, a plurality of gate lines G 1-GM, an at least source drive unit 12 (a source drive unit 12 is shown in figure) with
And array basal plate horizontal drive circuit (Gate driver On Array, hereinafter referred to as GOA circuit) 14.
The a plurality of source electrode line S1-SN and a plurality of gate lines G 1-GM are set on the viewing area 10.More clearly
It says, a plurality of source electrode line S1-SN is set on the viewing area 10 and extends to the source drive unit 12.It is described a plurality of
Gate lines G 1-GM is set on the viewing area 10 and extends to the multiple drive element of the grid 14.The a plurality of source electrode line
S1-SN is formed along a first direction.The a plurality of gate lines G 1-GM is formed along a second direction.The first direction perpendicular to
The second direction.The a plurality of source electrode line S1-SN and a plurality of gate lines G 1-GM define multiple pixels 16.Each institute
It states pixel 16 and is electrically connected to a thin film transistor (TFT) 18.
The source drive unit 12 is set on the non-display area 30 and is electrically connected to a plurality of source electrode line S1-
The first end of SN.The source drive unit 12 is used to provide data voltage, the data electricity to a plurality of source electrode line S1-SN
Pressure is for being written the pixel 16.
The GOA circuit 14 is set on the non-display area 30.The GOA circuit 14 is electrically connected to a plurality of grid
Polar curve G1-GM simultaneously is used to provide scanning signal to a plurality of gate lines G 1-GM.
The GOA circuit 14 includes multiple cascade GOA modules 140.Every level-one GOA module receives corresponding clock letter
Number.
Fig. 1 and Fig. 2 is please referred to, Fig. 2 shows the circuit diagram of a GOA module 140 in Fig. 1.
The GOA module 140 includes a pull-up control circuit 142, a pull-up circuit 144, a pull-down circuit 146, once
Draw holding circuit 148, a bootstrap capacitor Cb and a coupling circuit 150.
The pull-up control circuit 142 is used to realize precharge to the preliminary filling point Q of the GOA module 140.The pull-up control
Circuit 142 processed is usually electrically connected to the lower communication number that the GOA module 140 of upper level is transmitted.
The pull-up circuit 144 is electrically connected to the pull-up control circuit 142 and for improving the same level GOA module 140
Grid export OUT.The grid output OUT is used to be connected the film that scan line corresponding with the GOA module 140 is electrically connected
Transistor 18.
The pull-down circuit 146 is electrically connected to the pull-up control circuit 142 and the pull-up circuit 144 and for inciting somebody to action
The preliminary filling point Q and grid output OUT are pulled low to a low level VSS, and then are not turned on corresponding with the GOA module 140
The thin film transistor (TFT) 18 that scan line is electrically connected.
The drop-down holding circuit 148 is electrically connected to the pull-up control circuit 142, the pull-up circuit 144 and institute
State pull-down circuit 146 and for the preliminary filling point Q and grid output OUT to be maintained the low level VSS.
The bootstrap capacitor Cb is electrically connected to the pull-up control circuit 142, the pull-up circuit 144, the drop-down
Circuit 146 and the drop-down holding circuit 148 are simultaneously high for the grid output OUT of the GOA module 140 to be promoted to one first
Level (the first secondary coupling).
In order to reduce the fall time that the grid of the GOA module 140 exports OUT, the GOA module 140 into one of this announcement
Step includes the coupling circuit 150.The coupling circuit 150 are electrically connected to the pull-up control circuit 142, pull-up electricity
Road 144, the pull-down circuit 146, the drop-down holding circuit 148 and the bootstrap capacitor Cb are simultaneously used for the preliminary filling point Q
It is promoted to one second high level.Second high level is higher than first high level.
The coupling circuit 150 include an a first transistor T1 and first capacitor C1.
The grid of the first transistor T1 is electrically connected to the preliminary filling point Q.The source electrode electricity of the first transistor T1
Property is connected to the clock signal for the GOA module 140 that one is input to other grades.That is, the source electrode of the first transistor T1
The clock signal of electric connection is different from the clock signal for being input to the same level GOA module 140.For example, the first crystal
The source electrode of pipe T1 is electrically connected to the clock signal CK (k+1) of the GOA module 140 of next stage.The leakage of the first transistor T1
Pole is electrically connected to the preliminary filling point Q.
The first capacitor C1 is electrically connected between the drain electrode of the first transistor T1 and preliminary filling point Q and is used for
The preliminary filling point Q is couple by the output voltage of the first transistor T1.
Due to the coupling circuit 150 can be coupled again on the basis of the preliminary filling point Q (that is, second of coupling
Close), therefore can reduce the fall time of the grid output OUT of the GOA module 140, the GOA module 140 can be faster
It will be not turned on the thin film transistor (TFT) that scan line is electrically connected, the risk that 16 mistake of pixel is filled is lower.
Further, since the coupling circuit 150 can be coupled again (that is, on the basis of the preliminary filling point Q
Two secondary couplings), therefore the level of the preliminary filling point Q can be promoted again, and then manages the waveform of the grid output OUT more
Think.
Referring to Fig. 3, Fig. 3 shows the voltage curve C1 and existing GOA of the grid output OUT of the GOA module 140 of this announcement
The voltage curve C2 of the grid output of module.
As shown in figure 3, grid of the fall time of the grid output OUT of the GOA module 140 of this announcement than existing GOA module
The fall time of pole output is shorter, can decline about 10%.
Referring to Fig. 4, Fig. 4 shows the voltage curve C1 ' and existing GOA mould of the preliminary filling point Q of the GOA module 140 of this announcement
The voltage curve C2 ' of the preliminary filling point of block.
As shown in figure 4, the final voltage (ceiling voltage) of the preliminary filling point Q of the GOA module 140 of this announcement is higher than existing GOA
The final voltage of the preliminary filling point of module.
In the GOA circuit and liquid crystal display device of this announcement, since the coupling circuit can be in the preliminary filling point
On the basis of coupled (that is, second secondary coupling) again, therefore can reduce the GOA module grid output decline when
Between, and then reduce the risk that the pixel mistake is filled.In addition, the GOA circuit and liquid crystal display device of this announcement can mention again
The level of the preliminary filling point is risen, and then keeps the waveform of the grid output more ideal.
Although above preferred embodiment is not to limit in conclusion this announcement is disclosed above with preferred embodiment
This announcement is made, those skilled in the art can make various changes and profit in the spirit and scope for not departing from this announcement
Decorations, therefore the protection scope of this announcement subjects to the scope of the claims.
Claims (10)
1. a kind of GOA circuit, which is characterized in that including multiple cascade GOA modules, each the multiple GOA module includes:
Pull-up control circuit, for the preliminary filling point precharge to the module；
Pull-up circuit is electrically connected to the pull-up control circuit and the grid output for improving the GOA module；
Pull-down circuit is electrically connected to the pull-up control circuit and the pull-up circuit；
Holding circuit is pulled down, the pull-up control circuit, the pull-up circuit and the pull-down circuit are electrically connected to；
Bootstrap capacitor is electrically connected to the pull-up control circuit, the pull-up circuit, the pull-down circuit and drop-down dimension
Hold circuit and for grid output to be promoted to the first high level；And
Coupling circuit are electrically connected to the pull-up control circuit, the pull-up circuit, the pull-down circuit, drop-down dimension
It holds circuit and the bootstrap capacitor and is used to for the preliminary filling point being promoted to the second high level, second high level is higher than described
First high level.
2. GOA circuit according to claim 1, which is characterized in that the coupling circuit include:
The first transistor, the grid of the first transistor are electrically connected to the preliminary filling point, the source electrode of the first transistor
It is electrically connected to clock signal；And
First capacitor is electrically connected between the drain electrode of the first transistor and preliminary filling point.
3. GOA circuit according to claim 2, which is characterized in that the clock signal and be input to the GOA module
Clock signal is different.
4. GOA circuit according to claim 1, which is characterized in that the pull-down circuit is used for the preliminary filling point and institute
It states grid output and is pulled low to low level.
5. GOA circuit according to claim 4, which is characterized in that the drop-down holding circuit is used for the preliminary filling point
And the grid output maintains the low level.
6. a kind of liquid crystal display device characterized by comprising
A plurality of source electrode line；
A plurality of grid line, a plurality of source electrode line and a plurality of grid line define multiple pixels；And
GOA circuit is electrically connected to a plurality of grid line and is used to provide scanning signal to a plurality of grid line, described
GOA circuit includes multiple cascade GOA modules, and each the multiple GOA module includes:
Pull-up control circuit, for the preliminary filling point precharge to the module；
Pull-up circuit is electrically connected to the pull-up control circuit and the grid output for improving the GOA module；
Pull-down circuit is electrically connected to the pull-up control circuit and the pull-up circuit；
Holding circuit is pulled down, the pull-up control circuit, the pull-up circuit and the pull-down circuit are electrically connected to；
Bootstrap capacitor is electrically connected to the pull-up control circuit, the pull-up circuit, the pull-down circuit and drop-down dimension
Hold circuit and for grid output to be promoted to the first high level；And
Coupling circuit are electrically connected to the pull-up control circuit, the pull-up circuit, the pull-down circuit, drop-down dimension
It holds circuit and the bootstrap capacitor and is used to for the preliminary filling point being promoted to the second high level, second high level is higher than described
First high level.
7. liquid crystal display device according to claim 6, which is characterized in that the coupling circuit include:
The first transistor, the grid of the first transistor are electrically connected to the preliminary filling point, the source electrode of the first transistor
It is electrically connected to clock signal；And
First capacitor is electrically connected between the drain electrode of the first transistor and preliminary filling point.
8. liquid crystal display device according to claim 7, which is characterized in that the clock signal and be input to the GOA
The clock signal of module is different.
9. liquid crystal display device according to claim 6, which is characterized in that the pull-down circuit is used for the preliminary filling point
And the grid output is pulled low to low level.
10. liquid crystal display device according to claim 9, which is characterized in that the drop-down holding circuit is used for will be described
Preliminary filling point and grid output maintain the low level.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059101.9A CN109637483A (en) | 2019-01-22 | 2019-01-22 | GOA circuit and liquid crystal display device |
| PCT/CN2019/076913 WO2020151050A1 (en) | 2019-01-22 | 2019-03-05 | Goa circuit and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059101.9A CN109637483A (en) | 2019-01-22 | 2019-01-22 | GOA circuit and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109637483A true CN109637483A (en) | 2019-04-16 |
Family
ID=66062900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910059101.9A Pending CN109637483A (en) | 2019-01-22 | 2019-01-22 | GOA circuit and liquid crystal display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109637483A (en) |
| WO (1) | WO2020151050A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111243541A (en) * | 2020-02-26 | 2020-06-05 | 深圳市华星光电半导体显示技术有限公司 | GOA circuit and TFT substrate |
| CN111667793A (en) * | 2020-05-28 | 2020-09-15 | 昆山国显光电有限公司 | Shift register and display panel |
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| JP5419762B2 (en) * | 2010-03-18 | 2014-02-19 | 三菱電機株式会社 | Shift register circuit |
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- 2019-01-22 CN CN201910059101.9A patent/CN109637483A/en active Pending
- 2019-03-05 WO PCT/CN2019/076913 patent/WO2020151050A1/en active Application Filing
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| US6052426A (en) * | 1994-05-17 | 2000-04-18 | Thomson Lcd | Shift register using M.I.S. transistors of like polarity |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020151050A1 (en) | 2020-07-30 |
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| RJ01 | Rejection of invention patent application after publication |
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