CN110070839A - GOA circuit and display panel - Google Patents
GOA circuit and display panel Download PDFInfo
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- CN110070839A CN110070839A CN201910327516.XA CN201910327516A CN110070839A CN 110070839 A CN110070839 A CN 110070839A CN 201910327516 A CN201910327516 A CN 201910327516A CN 110070839 A CN110070839 A CN 110070839A
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- switching tube
- circuit unit
- goa
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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
- G09G3/3674—Details of drivers for scan electrodes
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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)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
A kind of GOA circuit of present disclosure and display panel, the GOA circuit passes through the Curve guide impeller to drop-down holding circuit unit, including introducing a suitable capacitor to the 53rd switching tube in drop-down holding circuit unit, so that still being able to work normally the drop-down holding circuit unit in the case where the 51st switching tube pulled down in holding circuit unit and the 53rd switching tube are by larger current stress influence and the biggish situation of its threshold voltage shift, the output waveform of first reference point Pn is normal, so that scanning level signal Qn maintains the normal current potential having, to be further ensured that scanning signal exports normal waveform.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of GOA circuits and display panel.
Background technique
The advantages that liquid crystal display panel is high, cheap, easy to carry with its display quality, become mobile communication equipment,
The display panel of PC, TV etc..Liquid crystal display panel actuation techniques are gradually intended to using GOA circuit at present, and GOA circuit can simplify
The production process of panel display board saves engagement (bonding) technique in horizontal scanning line direction, can promote production capacity, reduce
Product cost, while the integrated level that can promote display panel is allowed to be more suitable for making narrow frame or Rimless shows product, it is full
The vision of sufficient modern people is pursued.
GOA circuit, i.e. Gate Driver on Array technology, that is, utilize available liquid crystal display panel Array system
Gate driving circuit is produced on underlay substrate by journey, realizes the driving method progressively scanned to scan line.The GOA circuit packet
The GOA unit for including multistage interconnection, as shown in Figure 1, N grades of GOA units include pull-up control unit 110, pull-up circuit unit
120, bootstrap capacitor unit Cb (marked as 160 in Fig. 1), drop-down holding circuit unit 150, pull-down circuit unit 130, signal pass
Circuit unit 140 etc. is sent, N is the integer more than or equal to 1.
GOA technology has been widely used in panel design at present, therefore continues to optimize GOA circuit, so that GOA is electric
Road performance is more stable, it appears particularly important.In order to enable the scanning of the output end output current level of pull-up circuit unit 120
The waveform of signal Gn is normal, it is required that the output end of the pull-up control circuit unit 110 in GOA circuit was exported
It scans level signal Q (N) and keeps the normal current potential having.And in order to enable the output waveform of the scanning level signal Qn is positive
Often, therefore, to assure that the drop-down holding circuit unit 150 in GOA circuit works normally.However, in drop-down holding circuit unit 150
The pipe T51 that opens the light gate terminal and drain electrode end receive clock signal CKn, and clock signal CKn is high level signal, therefore,
The drain terminal voltage of switch transistor T 51 and the difference Vds of source terminal voltage can be very big, when Vds is bigger, the electric current of switch transistor T 51
Stress is more serious, and such switch transistor T 51 can be influenced by forward current stress for a long time, causes its threshold voltage vt h inclined
It moves seriously, and is electrically easy failure, there is also similar situations by the pipe T53 that equally opens the light, and thus will affect drop-down and maintain signal
Pn and switch transistor T 43, and drop-down holding circuit unit is caused to can not work normally, so that scanning level signal Qn's is defeated
Waveform will become the waveform output that is serious, and then influencing the scanning signal Gn of current level that declines out.
In view of this, it is desirable to provide a kind of novel GOA circuit can overcome in the drop-down holding circuit unit of existing GOA circuit
Switch transistor T FT be easy to be influenced by forward current stress caused by threshold voltage shift it is serious and influence scanning signal
The problems such as waveform exports.
Summary of the invention
The object of the present invention is to provide a kind of GOA circuit, by the Curve guide impeller to drop-down holding circuit unit,
Including introducing a suitable capacitor to the 53rd switching tube in drop-down holding circuit unit, so that under described
Draw the 51st switch transistor T 51 in holding circuit unit and the 53rd switch transistor T 53 by larger current stress influence and
It still is able to work normally the drop-down holding circuit unit in the biggish situation of its threshold voltage shift, the first reference point P's
Output waveform is normal, so that scanning level signal Qn maintains the normal current potential having, to be further ensured that scanning signal
The normal output of waveform.
According to an aspect of the present invention, a kind of GOA circuit, which is characterized in that the GOA circuit includes multiple cascade
GOA unit, every level-one GOA unit include a drop-down holding circuit unit；The drop-down holding circuit unit, for maintaining one
Grade scanning signal low level；The drop-down holding circuit unit include: one the 51st switching tube, one the 52nd switching tube,
One the 53rd switching tube, one the 54th switching tube and a first capacitor；The drain electrode of 51st switching tube receives one
Clock signal, the grid of the 51st switching tube receive the clock signal, the source electrode point of the 51st switching tube
It is not electrically connected to the one of the drain electrode of the 52nd switching tube, the grid of the 53rd switching tube and the first capacitor
End；The grid of 52nd switching tube receives a same level and scans level signal, and the source electrode of the 52nd switching tube connects
Receive the voltage source signal of a constant voltage low level source；The drain electrode of 53rd switching tube receives the clock signal, and described the
The grid of 53 switching tubes is respectively electrically connected to one end of the first capacitor and the drain electrode of the 52nd switching tube, institute
The source electrode for stating the 53rd switching tube is electrically connected to drain electrode and the other end of the first capacitor of the 54th switching tube；
The grid of 54th switching tube receives described the same level and scans level signal, and the source electrode of the 54th switching tube receives
The voltage source signal of the constant voltage low level source.
In one embodiment of this invention, the GOA unit further include: a pull-up control circuit unit, a pull-up circuit
Unit, a signal circuit unit and a pull-down circuit unit；The pull-up control circuit unit and the pull-up circuit list
Member electrical connection, the output end of the pull-up control circuit unit export a same level and scan level signal to the pull-up circuit list
Member；The pull-up circuit unit scans the control of level signal according to described the same level, and the same level clock signal is exported to the same level and is swept
Retouch the output end of signal；The signal circuit unit according to the same level clock signal, and by described the same level for sweeping
The control for retouching level signal generates n-th grade of grade communication number；The pull-down circuit unit is used for according to the n-th+4 grades scanning signals, will
First low level output provided by one constant voltage low level source to the same level scanning signal output end.
In one embodiment of this invention, the pull-down circuit unit include one the 43rd switching tube, the described 40th
The drain electrode of three switching tubes is electrically connected to the pull-up control circuit unit of the GOA unit, the grid of the 43rd switching tube
It is respectively electrically connected to the drain electrode and the described 5th of the other end, the 54th switch of the first reference point, the first capacitor
The source electrode of the source electrode of 13 switching tubes, the 43rd switching tube receives the voltage source signal of the constant voltage low level source.
In one embodiment of this invention, the pull-up control circuit unit is used to receive the n-th -4 grades scanning signals, and
By the control of the n-th -4 grades cascade signals, to generate the same level scanning level signal.
In one embodiment of this invention, the GOA unit further include: a bootstrap capacitor, the bootstrap capacitor with it is described
The electrical connection of pull-up control circuit unit, the bootstrap capacitor are used to generate the high level of the same level scanning level signal.
In one embodiment of this invention, the capacitance of the first capacitor be greater than 53 switching tube grid and
Source electrode is formed by the capacitance of the second capacitor.
In one embodiment of this invention, when the voltage value of the grid of the 53rd switching tube becomes larger, described
The voltage value of the other end of one capacitor correspondingly becomes larger, and the voltage value of one end of the first capacitor also correspondingly becomes larger, so that
It is further enlarged in the voltage value of the grid of 53 switching tube.
In one embodiment of this invention, when the voltage value of the other end of the first capacitor becomes larger, first ginseng
The voltage value of examination point correspondingly becomes larger, and the voltage value of the drain electrode of the 43rd switching tube also correspondingly becomes larger, so that institute
The voltage output for stating the same level scanning signal correspondingly becomes larger.
In one embodiment of this invention, the voltage value of the gate terminal of the 53rd switching tube is with the described 5th
The variation of the channel width ratio of 11 switching tubes and the 52nd switching tube and change.
According to another aspect of the present invention, the present invention provides a kind of display panel, including multirow pixel；The display panel
It further comprise above-mentioned GOA circuit, pixel described in every a line is connect with a GOA unit of the GOA circuit, and by the GOA
Unit driving.
It is an advantage of the current invention that GOA circuit of the present invention passes through the Curve guide impeller to drop-down holding circuit unit, packet
It includes and a suitable capacitor is introduced to the 53rd switching tube in drop-down holding circuit unit, so that the drop-down is tieed up
Hold the 51st switch transistor T 51 in circuit unit and the 53rd switch transistor T 53 by larger current stress influence and its
In the biggish situation of threshold voltage shift, the drop-down holding circuit unit can also worked normally, the first reference point Pn's
Output waveform is normal, so that scanning level signal Qn maintains the normal current potential having, to be further ensured that scanning signal
The normal output of waveform.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those skilled in the art, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the schematic diagram of existing GOA circuit.
Fig. 2 is the schematic diagram of the GOA circuit in one embodiment of the invention.
Fig. 3 is the 53 (Vth=of the 53rd switch transistor T in the drop-down holding circuit unit in GOA circuit of the present invention
When forward migration 9V) occurs, the simulation waveform of the first reference point Pn.
Fig. 4 is the 53rd switch transistor T 53 and the 5th in the drop-down holding circuit unit in GOA circuit of the present invention
When forward migration occurs for 11 switching tubes (Vth=9V), the simulation waveform of the first reference point Pn.
Fig. 5 is the 53rd switch transistor T 53 and the 5th in the drop-down holding circuit unit in GOA circuit of the present invention
When forward migration occurs for 11 switching tubes (Vth=9V), the simulation waveform of scanning signal Gn.
Fig. 6 is the schematic diagram of the display panel in one embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those skilled in the art's every other implementation obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
Description and claims of this specification and term " first " in above-mentioned attached drawing, " second ", " third " etc.
(if present) is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be appreciated that this
The object of sample description is interchangeable under appropriate circumstances.In addition, term " includes " and " having " and their any deformation, meaning
Figure, which is to cover, non-exclusive includes.
In patent document, the attached drawing that is discussed herein below and for describing each embodiment of principle disclosed by the invention only
For illustrating, and should not be construed as limiting the scope of the present disclosure.Those skilled in the art will appreciate that original of the invention
Reason can be implemented in any system suitably arranged.It will be explained in illustrative embodiments, these realities be shown in the attached drawings
The example for applying mode.In addition, terminal accoding to exemplary embodiment will be described in detail with reference to the attached drawings.Identical attached drawing mark in attached drawing
Number refer to identical element.
Term used in description of the invention is only used to describe particular implementation, and is not intended to show of the invention
Concept.Unless have clearly different meanings in context, it is otherwise, used in the singular to express the table for covering plural form
It reaches.In the description of the present invention, it should be appreciated that there are this hairs for the terms meant for illustration such as " comprising ", " having " and " containing "
A possibility that feature for being disclosed in bright specification, number, step, movement or combinations thereof, and be not intended to exclude may be present or can
A possibility that adding other one or more features, number, step, movement or combinations thereof.Same reference numerals in attached drawing refer to
For same section.
The embodiment of the present invention provides a kind of GOA circuit and display panel.It will be described in detail respectively below.
Referring to Fig.2, the schematic diagram of the GOA circuit in one embodiment of the invention.
The present invention provides a kind of GOA circuit, the GOA circuit includes multiple cascade GOA units, and every level-one GOA is mono-
Member includes a drop-down holding circuit unit 350.The drop-down holding circuit unit 350 is low for maintaining the same level scanning signal Gn
Level.
Specifically, the drop-down holding circuit unit 350 includes: one the 51st switch transistor T 51, one the 52nd switch
Pipe T52, one the 53rd switch transistor T 53, one the 54th switch transistor T 54 and a first capacitor Cgs.51st switch
The drain electrode of pipe T51 receives a clock signal CKn, and the grid of the 51st switch transistor T 51 receives the clock signal CKn,
The source electrode of 51st switch transistor T 51 is respectively electrically connected to the drain electrode of the 52nd switch transistor T 52, the described 50th
One end of the grid of three switch transistor Ts 53 and the first capacitor Cgs；The grid of 52nd switch transistor T 52 receives one
Grade scanning level signal Qn, the source electrode of the 52nd switch transistor T 52 receive the voltage source letter of a constant voltage low level source VSS
Number；The drain electrode of 53rd switch transistor T 53 receives clock signal CKn, the grid difference of the 53rd switch transistor T 53
It is electrically connected to one end of the first capacitor Cgs and the drain electrode of the 52nd switch transistor T 52；53rd switching tube
The source electrode of T53 is respectively electrically connected to drain electrode and the other end of the first capacitor Cgs of the 54th switch transistor T 54；Institute
The grid for stating the 54th switch transistor T 54 receives the same level scanning level signal Qn, the source of the 54th switch transistor T 54
Pole receives the voltage source signal of the constant voltage low level source VSS.
With continued reference to Fig. 2, the GOA unit further include: a pull-up control circuit unit 310, a pull-up circuit unit
320, a signal circuit unit 340 and a pull-down circuit unit 330.
The pull-up control circuit unit 310 is electrically connected with the pull-up circuit unit 320, the pull-up control circuit list
The same level that the output end of member 310 exports scans level signal Qn to the pull-up circuit unit 320.Specifically, the pull-up control
Circuit unit 310 processed is for receiving the n-th -4 grades scanning signal Gn-4, and by the control of the n-th -4 grades cascade signal STn-4, with
It generates the same level and scans level signal Qn.
The pull-up circuit unit 320 scans the control of level signal Qn according to described the same level, by the same level clock signal CKn
It exports to the output end of the same level scanning signal Gn.
The signal circuit unit 340 is used for according to the same level clock signal CKn, and is scanned by described the same level
The control of level signal Qn generates n-th grade of grade communication STn.
The pull-down circuit unit 330 is used for according to the n-th+4 grades scanning signal Gn+4, by a constant voltage low level source VSS institute
There is provided the first low level output to the same level scanning signal Gn output end.Specifically, the pull-down circuit unit 330 wraps
One the 43rd switch transistor T 43 is included, the drain electrode of the 43rd switch transistor T 43 is electrically connected to the pull-up control of the GOA unit
The grid of circuit unit 310 processed, the 43rd switch transistor T 43 is respectively electrically connected to the first reference point Pn, the described 50th
The drain electrode of the source electrode of three switch transistor Ts 53, the other end of the first capacitor Cgs and the 54th switch transistor T 54, described
The source electrode of 43 switch transistor Ts 43 receives the voltage source signal of the constant voltage low level source VSS
In addition, the GOA unit further include: a bootstrap capacitor Cb (in Fig. 3 marked as 360), the bootstrap capacitor Cb
It is electrically connected with the pull-up control circuit unit 310, the bootstrap capacitor Cb is for generating the same level scanning level signal Qn
High level.
In the present embodiment, the 51st switch transistor T 51, the 52nd switch transistor T 52, the described 53rd
Switch transistor T 53, the 54th switch transistor T 54 and the 43rd switch transistor T 43 are N type switch tube.
In the GOA circuit of the prior art, drop-down holding circuit unit 350 as shown in Figure 1, the 51st switch
The drain and gate end of pipe T51 receives clock signal CKn, when clock signal CKn is high-voltage signal VGH, i.e. high-voltage signal VGH
When for 28V, the Vds voltage of the 51st switch transistor T 51 is the difference of its drain terminal voltage and source terminal voltage, works as Vds
When voltage is bigger, current stress is more serious, and then the threshold voltage vt h of the 51st switch transistor T 51 is bigger, the electricity of gate terminal
Stream is bigger, and causes threshold voltage Vth shift serious.
And in GOA circuit of the present invention, following improvement has been carried out to the drop-down holding circuit unit 350.
In drop-down holding circuit unit 350 of the invention, a first capacitor Cgs is increased newly.The one of the first capacitor Cgs
End is respectively electrically connected to the source electrode of the 51st switch transistor T 51, the grid of the 53rd switch transistor T 53 and described the
The drain electrode of 52 switch transistor Ts 52, the other end of the first capacitor Cgs are respectively electrically connected to the 53rd switching tube
The source electrode of T53, the first reference point Pn, the grid of the 43rd switch transistor T 43 and the 54th switch transistor T 54
Drain electrode.
In the present embodiment, first capacitor Cgs, the as the 53rd switch are set in drop-down holding circuit unit 350
Additional capacitor between the grid and source electrode of pipe T53, and the capacitance of the first capacitor Cgs is greater than 53 switching tube
The grid and source electrode of T53 are formed by the capacitance of the second capacitor.
Further, the first capacitor Cgs is as a positive feedback capacitor, for improving the defeated of the 53rd switch transistor T 53
Waveform out, referring specifically to Fig. 3 and Fig. 4.Specifically, when wave occurs for the voltage value of the grid of the 53rd switch transistor T 53
It is dynamic, such as when the voltage value of grid of the 53rd switch transistor T 53 becomes larger, the voltage value of the other end of the first capacitor Cgs
Correspondingly become larger, the voltage value of one end of the first capacitor Cgs also correspondingly becomes larger, so that 53 switching tube
The voltage value of the grid of T53 is further enlarged.
When the voltage value of the other end of the first capacitor Cgs becomes larger, the voltage value of the first reference point Pn is corresponding
Ground becomes larger, and can refer to shown in Fig. 3, Fig. 4.Wherein A indicates the first reference in present invention drop-down holding circuit unit 350 in Fig. 3
The waveform of point Pn, A ' are the waveform of the first reference point Pn in the drop-down holding circuit unit of the prior art.B indicates this in Fig. 4
The waveform of the first reference point Pn in invention drop-down holding circuit unit 350, B are in the drop-down holding circuit unit of the prior art
The first reference point Pn waveform.
The voltage value of the drain electrode of 43rd switch transistor T 43 also correspondingly becomes larger, so that described the same level scanning letter
The voltage output of number Gn correspondingly becomes larger, as shown in Figure 5.Wherein C indicates the waveform of the same level scanning signal Gn of the present invention in Fig. 5,
C ' is the waveform of the same level scanning signal Gn of the prior art.
With continued reference to Fig. 2, in this hair embodiment, the voltage value of the gate terminal of the 53rd switch transistor T 53 be with
The variation of the channel width ratio of the 51st switch transistor T 51 and the 52nd switch transistor T 52 and change.Namely
It says, the voltage value of the gate terminal of the 53rd switch transistor T 53 is with the 51st switch transistor T 51 and the described 5th
The voltage proportion of 12 switch transistor Ts 52 changes and changes.In addition, the voltage value of the gate terminal of the 53rd switch transistor T 53
Also changed according to the voltage value of the drain electrode end of the 51st switch transistor T 51 and changed (because of the 52nd switching tube
The voltage value of the source terminal of T52 is fixed).
By the Curve guide impeller to drop-down holding circuit unit 350, including to the 5th in drop-down holding circuit unit 350
13 switch transistor Ts 53 introduce a suitable first capacitor Cgs, so that in the drop-down holding circuit unit 350
The 51st switch transistor T 51 and the 53rd switch transistor T 53 by larger current stress influence and its threshold voltage shift compared with
It still is able to work normally the drop-down holding circuit unit 350 in the case where big, the output waveform of the first reference point Pn is positive
Often, so that scanning level signal Qn maintains the normal current potential having, to be further ensured that the normal of scanning signal Gn waveform
Output.
Refering to Fig. 6, according to another aspect of the present invention, a kind of display panel 600 is provided, including multirow pixel is (in figure not
Show)；The display panel 600 further comprises above-mentioned GOA circuit 300, pixel described in every a line and the GOA circuit 300
The connection of one GOA unit (not shown), and driven by the GOA unit.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of GOA circuit, which is characterized in that the GOA circuit includes multiple cascade GOA units, every level-one GOA unit packet
Include a drop-down holding circuit unit；
The drop-down holding circuit unit, for maintaining the same level scanning signal low level；
The drop-down holding circuit unit includes: one the 51st switching tube, one the 52nd switching tube, one the 53rd switch
Pipe, one the 54th switching tube and a first capacitor；The drain electrode of 51st switching tube receives a clock signal, and described the
The grids of 51 switching tubes receives the clock signal, and the source electrode of the 51st switching tube is respectively electrically connected to described the
The drain electrode of 52 switching tubes, the grid of the 53rd switching tube and the first capacitor one end；Described 52nd
The grid of switching tube receives a same level and scans level signal, and the source electrode of the 52nd switching tube receives a constant voltage low level source
Voltage source signal；The drain electrode of 53rd switching tube receives the clock signal, the grid of the 53rd switching tube
Pole is respectively electrically connected to one end of the first capacitor and the drain electrode of the 52nd switching tube, the 53rd switching tube
Source electrode be electrically connected to the 54th switching tube drain electrode and the first capacitor the other end；54th switch
The grid of pipe receives described the same level and scans level signal, and the source electrode of the 54th switching tube receives the constant voltage low level source
Voltage source signal.
2. GOA circuit according to claim 1, which is characterized in that the GOA unit further include: a pull-up control circuit
Unit, a pull-up circuit unit, a signal circuit unit and a pull-down circuit unit；
The pull-up control circuit unit is electrically connected with the pull-up circuit unit, the output end of the pull-up control circuit unit
It exports a same level and scans level signal to the pull-up circuit unit；
The pull-up circuit unit scans the control of level signal according to described the same level, and the same level clock signal is exported to the same level and is swept
Retouch the output end of signal；
The signal circuit unit is used for according to the same level clock signal, and by described the same level scanning level signal
Control generates n-th grade of grade communication number；
The pull-down circuit unit is used for according to the n-th+4 grades scanning signals, by the first low electricity provided by a constant voltage low level source
It is flat to export to the output end of the same level scanning signal.
3. GOA circuit according to claim 2, which is characterized in that the pull-down circuit unit is opened including one the 43rd
Guan Guan, the drain electrode of the 43rd switching tube are electrically connected to the pull-up control circuit unit of the GOA unit, and the described 40th
The grid of three switching tubes be respectively electrically connected to the first reference point, the first capacitor the other end, it is described 54th switch
The source electrode of drain electrode and the 53rd switching tube, the source electrode of the 43rd switching tube receive the constant voltage low level source
Voltage source signal.
4. GOA circuit according to claim 2, which is characterized in that the pull-up control circuit unit is for receiving n-th -4
Grade scanning signal, and by the control of the n-th -4 grades cascade signals, to generate the same level scanning level signal.
5. GOA circuit according to claim 2, which is characterized in that the GOA unit further include: a bootstrap capacitor, it is described
Bootstrap capacitor is electrically connected with the pull-up control circuit unit, and the bootstrap capacitor is for generating the same level scanning level signal
High level.
6. GOA circuit according to claim 1, which is characterized in that the capacitance of the first capacitor is greater than described 50
The grid and source electrode of three switching tubes are formed by the capacitance of the second capacitor.
7. GOA circuit according to claim 3, which is characterized in that when the voltage of the grid of the 53rd switching tube
When value becomes larger, the voltage value of the other end of the first capacitor correspondingly becomes larger, the voltage value of one end of the first capacitor
Correspondingly become larger, so that the voltage value of the grid of 53 switching tube is further enlarged.
8. GOA circuit according to claim 7, which is characterized in that when the voltage value of the other end of the first capacitor becomes
When big, the voltage value of first reference point correspondingly becomes larger, and the voltage value of the drain electrode of the 43rd switching tube is also corresponding
Ground becomes larger, so that the voltage output of the same level scanning signal correspondingly becomes larger.
9. GOA circuit according to claim 1, which is characterized in that the voltage of the gate terminal of the 53rd switching tube
Value is the variation of the channel width ratio with the 51st switching tube and the 52nd switching tube and changes.
10. a kind of display panel, including multirow pixel；It is characterized in that, the display panel further comprises claim 1-9
GOA circuit described in any one, pixel described in every a line are connect with a GOA unit of the GOA circuit, and by the GOA
Unit driving.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910327516.XA CN110070839A (en) | 2019-04-23 | 2019-04-23 | GOA circuit and display panel |
| PCT/CN2019/102435 WO2020215553A1 (en) | 2019-04-23 | 2019-08-26 | Goa circuit and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910327516.XA CN110070839A (en) | 2019-04-23 | 2019-04-23 | GOA circuit and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110070839A true CN110070839A (en) | 2019-07-30 |
Family
ID=67368429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910327516.XA Pending CN110070839A (en) | 2019-04-23 | 2019-04-23 | GOA circuit and display panel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110070839A (en) |
| WO (1) | WO2020215553A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020215553A1 (en) * | 2019-04-23 | 2020-10-29 | 深圳市华星光电半导体显示技术有限公司 | Goa circuit and display panel |
| CN113744701A (en) * | 2021-07-30 | 2021-12-03 | 北海惠科光电技术有限公司 | Display panel's drive circuit, array substrate and display panel |
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| CN113744701A (en) * | 2021-07-30 | 2021-12-03 | 北海惠科光电技术有限公司 | Display panel's drive circuit, array substrate and display panel |
Also Published As
| Publication number | Publication date |
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| WO2020215553A1 (en) | 2020-10-29 |
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