CN106297714A - Scan drive circuit and display device - Google Patents
Scan drive circuit and display device Download PDFInfo
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- CN106297714A CN106297714A CN201610867947.1A CN201610867947A CN106297714A CN 106297714 A CN106297714 A CN 106297714A CN 201610867947 A CN201610867947 A CN 201610867947A CN 106297714 A CN106297714 A CN 106297714A
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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
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The present invention provides a kind of scan drive circuit, and for the scan line of cascade is driven operation, it includes pulling up control module, driving module, drop-down module, drop-down maintenance module and constant voltage low level source；The most drop-down maintenance module includes the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube and the tenth switching tube.The present invention also provides for a kind of display device, the scan drive circuit of the present invention and the display device setting by drop-down maintenance module, scanning level signal is carried out segmentation drop-down, so can well avoid the generation of the leaky of switching tube in drop-down maintenance module, improve the reliability of scan drive circuit.
Description
Technical field
The present invention relates to show driving field, particularly relate to a kind of scan drive circuit and display device.
Background technology
Gate Driver On Array, is called for short GOA, i.e. on the array base palte of existing Thin Film Transistor-LCD
Make scan drive circuit, it is achieved the type of drive to scan line progressive scan.The structural representation of existing scan drive circuit
As it is shown in figure 1, this scan drive circuit 10 includes pulling up control module 101, driving module 102, drop-down module 103, bootstrapping electricity
Appearance 104 and drop-down maintenance module 105.
When this scan drive circuit 10 works at high operating temperatures, the threshold voltage of switching tube can move, so toward negative value
The switching tube causing drop-down maintenance module 105 is susceptible to electric leakage, thus affects the reliability of this scan drive circuit.
Therefore, it is necessary to provide a kind of scan drive circuit and display device, to solve the problem existing for prior art.
Summary of the invention
It is an object of the invention to provide a kind of leaky is relatively light and reliability is higher scan drive circuit and display
Device, to solve the leaky that is susceptible to of existing scan drive circuit, thus affects the reliability of scan drive circuit
Technical problem.
The embodiment of the present invention provides a kind of scan drive circuit, for the scan line of cascade is driven operation, and its bag
Include:
Pull-up control module, for receiving the cascade signal of higher level, and generates corresponding according to the cascade signal of described higher level
The scanning level signal of described scan line；
Drive module, for according to described scanning level signal and the clock signal of this grade, draw high corresponding described in sweep
Retouch the scanning signal of this grade of line；
Drop-down module, for the scanning signal according to subordinate, drags down the scanning level signal of corresponding described scan line；
Drop-down maintenance module, for maintaining the low level of the scanning level signal of corresponding described scan line；And
Constant voltage low level source, is used for providing drop-down low level；
Wherein said drop-down maintenance module include the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube with
And the tenth switching tube；
The input input low frequency electric potential signal of described 6th switching tube；The control end input low frequency of described 6th switching tube
Electric potential signal, the outfan of described 6th switching tube and the first reference point connect；
The end that controls of described 7th switching tube is connected with the output of described pull-up control module, described 7th switching tube defeated
Entering end to be connected with described constant voltage low level source, the outfan of described 7th switching tube is connected with described first reference point；
The control end of described 8th switching tube is connected with described first reference point, the input of described 8th switching tube and institute
The output stating pull-up control module connects, and the outfan of described 8th switching tube is connected with the output of described driving module；
The control end of described 9th switching tube is connected with described first reference point, the input of described 9th switching tube and institute
Stating constant voltage low level source to connect, the outfan of described 9th switching tube is connected with the output of described driving module；
The control end of described tenth switching tube is connected with described first reference point, the input of described tenth switching tube and institute
Stating constant voltage low level source to connect, the outfan of described tenth switching tube is connected with the output of described driving module.
In scan drive circuit of the present invention, described pull-up control module includes the first switching tube, described first
The cascade signal controlling end input upper level of switching tube, the input of described first switching tube is connected with constant voltage high level source,
The outfan of described first switching tube exports described scanning level signal.
In scan drive circuit of the present invention, described driving module includes second switch pipe and the 3rd switch
Pipe,
The end that controls of described second switch pipe is connected with the output of described pull-up control module, described second switch pipe defeated
Entering the clock signal of end described level of input, the outfan of described second switch pipe exports the cascade signal of this grade；Described 3rd
The end that controls of switching tube is connected with the output of described pull-up control module, and the input of described 3rd switching tube inputs described level
Clock signal, the outfan of described 3rd switching tube exports the scanning signal of this grade.
In scan drive circuit of the present invention, described scan drive circuit also includes for generating described scan line
The bootstrap capacitor of high level of scanning signal of this grade；
Described bootstrap capacitor one end is connected with the output of described pull-up control module, the other end of described bootstrap capacitor and institute
The outfan stating the 3rd switching tube connects.
In scan drive circuit of the present invention, described drop-down module includes the 4th switching tube and the 5th switch
Pipe；
The end that controls of described 4th switching tube inputs the scanning signal of described next stage, the input of described 4th switching tube
Being connected with described constant voltage low level source, the outfan of described 4th switching tube is connected with the outfan of described first switching tube；
The end that controls of described 5th switching tube inputs the scanning signal of described next stage, the input of described 5th switching tube
Being connected with described constant voltage low level source, the outfan of described 5th switching tube is connected with described driving module outfan.
The embodiment of the present invention also provides for a kind of display device, it display panels including having data wire and scan line
And for the described scan line of cascade being driven the scan drive circuit of operation；Wherein said scan drive circuit includes:
Pull-up control module, for receiving the cascade signal of higher level, and generates corresponding according to the cascade signal of described higher level
The scanning level signal of described scan line；
Drive module, for according to described scanning level signal and the clock signal of this grade, draw high corresponding described in sweep
Retouch the scanning signal of this grade of line；
Drop-down module, for the scanning signal according to subordinate, drags down the scanning level signal of corresponding described scan line；
Drop-down maintenance module, for maintaining the low level of the scanning level signal of corresponding described scan line；And
Constant voltage low level source, is used for providing drop-down low level；
Wherein said drop-down maintenance module include the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube with
And the tenth switching tube；
The input input low frequency electric potential signal of described 6th switching tube；The control end input low frequency of described 6th switching tube
Electric potential signal, the outfan of described 6th switching tube and the first reference point connect；
The end that controls of described 7th switching tube is connected with the output of described pull-up control module, described 7th switching tube defeated
Entering end to be connected with described constant voltage low level source, the outfan of described 7th switching tube is connected with described first reference point；
The control end of described 8th switching tube is connected with described first reference point, the input of described 8th switching tube and institute
The output stating pull-up control module connects, and the outfan of described 8th switching tube is connected with the output of described driving module；
The control end of described 9th switching tube is connected with described first reference point, the input of described 9th switching tube and institute
Stating constant voltage low level source to connect, the outfan of described 9th switching tube is connected with the output of described driving module；
The control end of described tenth switching tube is connected with described first reference point, the input of described tenth switching tube and institute
Stating constant voltage low level source to connect, the outfan of described tenth switching tube is connected with the output of described driving module.
In display device of the present invention, described pull-up control module includes the first switching tube, described first switch
The cascade signal controlling end input upper level of pipe, the input of described first switching tube is connected with constant voltage high level source, described
The outfan of the first switching tube exports described scanning level signal.
In display device of the present invention, described driving module includes second switch pipe and the 3rd switching tube,
The end that controls of described second switch pipe is connected with the output of described pull-up control module, described second switch pipe defeated
Entering the clock signal of end described level of input, the outfan of described second switch pipe exports the cascade signal of this grade；Described 3rd
The end that controls of switching tube is connected with the output of described pull-up control module, and the input of described 3rd switching tube inputs described level
Clock signal, the outfan of described 3rd switching tube exports the scanning signal of this grade.
In display device of the present invention, described scan drive circuit also includes the basis for generating described scan line
The bootstrap capacitor of the high level of the scanning signal of level；
Described bootstrap capacitor one end is connected with the output of described pull-up control module, the other end of described bootstrap capacitor and institute
The outfan stating the 3rd switching tube connects.
In display device of the present invention, described drop-down module includes the 4th switching tube and the 5th switching tube；
The end that controls of described 4th switching tube inputs the scanning signal of described next stage, the input of described 4th switching tube
Being connected with described constant voltage low level source, the outfan of described 4th switching tube is connected with the outfan of described first switching tube；
The end that controls of described 5th switching tube inputs the scanning signal of described next stage, the input of described 5th switching tube
Being connected with described constant voltage low level source, the outfan of described 5th switching tube is connected with described driving module outfan.
Compared to existing scan drive circuit and display device, scan drive circuit and the display device of the present invention are passed through
The setting of drop-down maintenance module, carries out segmentation to scanning level signal drop-down, so can well avoid drop-down maintenance module
In the generation of leaky of switching tube, improve the reliability of scan drive circuit；Solve existing scan drive circuit
Be susceptible to leaky, thus affect the technical problem of the reliability of scan drive circuit.
For the foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, make
Describe in detail as follows:
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of existing scan drive circuit；
Fig. 2 is the structural representation of the preferred embodiment of the scan drive circuit of the present invention
Fig. 3 is the signal waveforms of the preferred embodiment of the scan drive circuit of the present invention.
Detailed description of the invention
The explanation of following embodiment is particular implementation that is graphic with reference to add, that implement in order to illustrate the present invention may be used to
Example.The direction term that the present invention is previously mentioned, such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side "
Deng, it is only the direction with reference to annexed drawings.Therefore, the direction term of use is to illustrate and understand the present invention, and is not used to
Limit the present invention.
In the drawings, the unit that structure is similar is to represent with identical label.
Refer to the structural representation of the preferred embodiment of the scan drive circuit that Fig. 2 and Fig. 3, Fig. 2 are the present invention；Fig. 3
The signal waveforms of preferred embodiment for the scan drive circuit of the present invention.The scan drive circuit of this preferred embodiment is used for
The scan line of cascade is driven operation, and the scan drive circuit 20 of this preferred embodiment includes pulling up control module 21, driving
Dynamic model block 22, drop-down module 23, drop-down maintenance module 24, constant voltage low level source VSS and bootstrap capacitor Cb.
Pull-up control module 21 is used for receiving the cascade signal ST (N-1) of higher level, and according to the cascade signal ST (N-of higher level
1) scanning level signal Q (N) of corresponding scan line is generated；Drive module 22 for according to scanning level signal Q (N) and basis
Clock signal CK of level, draws high scanning signal G (N) of this grade of corresponding scan line；Drop-down module 23 is for according to subordinate
Scanning signal G (N+1), drags down scanning level signal G (N) of corresponding scan line；Drop-down maintenance module 24 is used for remaining corresponding
The low level of scanning level signal G (N) of scan line；Constant voltage low level source VSS is used for providing drop-down low level；Bootstrap capacitor
Cb is for generating the high level of scanning signal G (N) of scan line.
Wherein pull-up control module 21 includes the first switch transistor T 1, the level controlling end input upper level of the first switch transistor T 1
Connection signal ST (N-1), the input of the first switch transistor T 1 is connected with constant voltage high level source VGH, the outfan of the first switch transistor T 1
Output scanning level signal Q (N).
Module 22 is driven to include second switch pipe T2 and the 3rd switch transistor T 3.The control end of second switch pipe T2 and pull-up control
The output of molding block 21 connects, and the input of second switch pipe T2 inputs clock signal CK of this grade, and second switch pipe T2's is defeated
Go out end and export the cascade signal ST (N) of this grade；The end that controls of the 3rd switch transistor T 3 is connected with the output of pull-up control module 21, the
The input of three switch transistor T 3 inputs clock signal CK of this grade, and the outfan of the 3rd switch transistor T 3 exports the scanning signal of this grade
G(N)。
One end of bootstrap capacitor Cb is connected with the output of pull-up control module 21, and the other end of bootstrap capacitor Cb and the 3rd is opened
The outfan closing pipe T3 connects.
Drop-down module 23 includes the 4th switch transistor T 4 and the 5th switch transistor T 5.The control end of the 4th switch transistor T 4 inputs next
Scanning signal G (N+1) of level, the input of the 4th switch transistor T 4 is connected with constant voltage low level source VSS, the 4th switch transistor T 4 defeated
Go out end to be connected with the outfan of the first switch transistor T 1；The scanning signal G (N+ controlling end input next stage of the 5th switch transistor T 5
1), the input of the 5th switch transistor T 5 is connected with constant voltage low level source VSS, the outfan of the 5th switch transistor T 5 and driving module 22
Outfan connect.
Drop-down maintenance module 24 includes the 6th switch transistor T the 6, the 7th switch transistor T the 7, the 8th switch transistor T the 8, the 9th switch transistor T 9
And the tenth switch transistor T 10；
The input input low frequency electric potential signal LC1 of the 6th switch transistor T 6；The control end input low frequency of the 6th switch transistor T 6
Electric potential signal LC1, the outfan of the 6th switch transistor T 6 and the first reference point connect P (N)；The control end of the 7th switch transistor T 7 is with upper
The output drawing control module 21 connects, and the input of the 7th switch transistor T 7 is connected with constant voltage low level source VSS, the 7th switch transistor T 7
Outfan and the first reference point P (N) connect；The control end of the 8th switch transistor T 8 and the first reference point P (N) connect, and the 8th opens
The output of the input and pull-up control module 21 that close pipe T8 is connected, and the outfan of the 8th switch transistor T 8 is defeated with driving module 22
Go out to connect；The control end of the 9th switch transistor T 9 and the first reference point P (N) connect, and the input of the 9th switch transistor T 9 is low with constant voltage
Level source VSS connects, and the outfan of the 9th switch transistor T 9 is connected with the output driving module 22；The control of the tenth switch transistor T 10
End is connected with the first reference point P (N), and the input of the tenth switch transistor T 10 is connected with constant voltage low level source VSS, the tenth switching tube
The outfan of T10 is connected with the output driving module 22.
Refer to Fig. 2 and Fig. 3, when the scan drive circuit 20 of this preferred embodiment uses, when the cascade signal of upper level
When ST (N-1) is high level, the first switch transistor T 1 turns on, and the high level signal of constant voltage high level source VGH passes through the first switching tube
T1 charges to bootstrap capacitor Cb so that scanning level signal Q (N) rises to a higher level.The cascade letter of upper level subsequently
Number ST (N-1) transfers low level to, and the first switch transistor T 1 disconnects, and scanning level signal Q (N) remains one higher by bootstrap capacitor Cb
Level.
Clock signal CK of this grade transfers high level to subsequently, and clock signal CK is continued to bootstrapping electricity by the 3rd switch transistor T 3
Hold Cb charging so that scanning level signal Q (N) reaches a higher level, and scanning signal G (N) of this grade also transfers high level to.
At this moment second switch pipe T2 and the 3rd switch transistor T 3 turn on, and the outfan of the 3rd switch transistor T 3 exports the scanning of this grade
Signal G (N), the outfan of second switch pipe T2 exports the cascade signal ST (N) of this grade.Simultaneously because the 7th switch transistor T 7 is being swept
Turning under the effect of the high level retouching level signal Q (n), the first reference point P (N) is protected under the control of constant voltage low level source VSS
Hold low level, thus the 8th switch transistor T the 8, the 9th switch transistor T 9 and the tenth switch transistor T 10 remain off, thus ensure
The high level of scan control signal Q (N).Owing to scan control signal Q (N) is by the 8th switch transistor T 8 and the 9th switch transistor T 9
Be connected to constant voltage low level source VSS, i.e. pressure reduction between scan control signal Q (N) and constant voltage low level source VSS is opened by two
The source-drain voltage closing pipe is shared, and so can preferably avoid the 8th switch transistor T 8 and the leaky of the 9th switch transistor T 9
Generation.
When scanning signal G (N+1) of next stage transfers high level to, the 4th switch transistor T 4 and the 5th switch transistor T 5 turn on,
Scan control signal Q (N) is pulled to low level by constant voltage low level source VSS, and now the 7th switch transistor T 7 is in the scanning control of low-voltage
Disconnecting under the effect of signal Q (N) processed, low frequency electric potential signal LC1 passes through the 6th switch transistor T 6 by the voltage of the first reference point P (N)
Being pulled to high level state, at this moment the 8th switch transistor T the 8, the 9th switch transistor T 9 and the tenth switch transistor T 10 turn on, and scan control is believed
Number Q (N) is connected with constant voltage low level source VSS by the 8th switch transistor T 8 and the 9th switch transistor T 9, thus keeps scan control to believe
The low level of number Q (N), scanning signal G (N) of this grade is connected with constant voltage low level source VSS by the tenth switch transistor T 10, thus
Keep the low level of scanning signal G (N) of this grade.
In sum, the drop-down maintenance module 24 of the scan drive circuit 20 of this preferred embodiment is by the 8th switch transistor T 8
With the setting of the 9th switch transistor T 9, when can preferably to avoid scan control signal Q (N) be high potential state, drop-down maintenance mould
The generation of the leaky of the switching tube of block 24.
Scanning level signal, by the setting of drop-down maintenance module, is carried out under segmentation by the scan drive circuit of the present invention
Draw, so can well avoid the generation of the leaky of switching tube in drop-down maintenance module, improve scan drive circuit
Reliability.
The present invention also provides for a kind of display device, and this display device includes the LCD with data wire and scan line
Plate and for cascade scan line be driven operation scan drive circuit.
This scan drive circuit includes pulling up control module, driving module, drop-down module, drop-down maintenance module, constant voltage low
Level source and bootstrap capacitor.
Pull-up control module is for receiving the cascade signal of higher level, and generates corresponding scanning according to the cascade signal of higher level
The scanning level signal of line；Drive module for according to scanning level signal and the clock signal of this grade, drawing high and sweep accordingly
Retouch the scanning signal of this grade of line；Drop-down module, for the scanning signal according to subordinate, drags down the scanning electricity of corresponding scan line
Ordinary mail number；Drop-down maintenance module is for maintaining the low level of the scanning level signal of corresponding scan line；Constant voltage low level source is used
In providing drop-down low level；Bootstrap capacitor is for generating the high level of the scanning signal of scan line.
The most drop-down maintenance module includes the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube and
Ten switching tubes；
The input input low frequency electric potential signal of the 6th switching tube；The control end input low frequency current potential letter of the 6th switching tube
Number, the outfan of the 6th switching tube and the first reference point connect；The output controlling end and pull-up control module of the 7th switching tube
Connecting, the input of the 7th switching tube is connected with constant voltage low level source, and the outfan of the 7th switching tube and the first reference point connect；
The control end of the 8th switching tube and the first reference point connect, and the input of the 8th switching tube connects with the output of pull-up control module
Connecing, the outfan of described 8th switching tube is connected with the output of described driving module；The control end of the 9th switching tube and the first ginseng
Examination point connects, and the input of the 9th switching tube is connected with constant voltage low level source, the outfan of the 9th switching tube and driving module
Output connects；The control end of the tenth switching tube and the first reference point connect, the input of the tenth switching tube and constant voltage low level source
Connecting, the outfan of the tenth switching tube is connected with the output driving module.
Preferably, pull-up control module includes the first switching tube, the cascade controlling end input upper level of the first switching tube
Signal, the input of the first switching tube is connected with constant voltage high level source, and the outfan of the first switching tube exports described scanning level
Signal.
Preferably, module is driven to include second switch pipe and the 3rd switching tube, the control end of second switch pipe and pull-up
The output of control module connects, and the input of second switch pipe inputs the clock signal of this grade, and the outfan of second switch pipe is defeated
Go out the cascade signal of this grade；The end that controls of the 3rd switching tube is connected with the output of pull-up control module, the input of the 3rd switching tube
End inputs the clock signal of this grade, and the outfan of the 3rd switching tube exports the scanning signal of this grade.
Preferably, scan drive circuit also includes the bootstrapping of high level of scanning signal of this grade for generating scan line
Electric capacity；Bootstrap capacitor one end is connected with the output of pull-up control module, the other end of bootstrap capacitor and the output of the 3rd switching tube
End connects.
Preferably, drop-down module includes the 4th switching tube and the 5th switching tube；Under the control end input of the 4th switching tube
The scanning signal of one-level, the input of the 4th switching tube is connected with constant voltage low level source, the outfan and first of the 4th switching tube
The outfan of switching tube connects；The scanning signal controlling end input next stage of the 5th switching tube, the input of the 5th switching tube
Being connected with constant voltage low level source, the outfan of the 5th switching tube is connected with driving module outfan.
The specific works principle of the display device of the present invention and retouching in the preferred embodiment of above-mentioned scan drive circuit
State same or similar, specifically refer to the associated description in the preferred embodiment of scan drive circuit.
The scan drive circuit of the present invention and the display device setting by drop-down maintenance module, enter scanning level signal
Row segmentation is drop-down, so can well avoid the generation of the leaky of switching tube in drop-down maintenance module, improves scanning
The reliability of drive circuit；Solve the leaky that is susceptible to of existing scan drive circuit, thus affect turntable driving
The technical problem of the reliability of circuit.
In sum, although the present invention is disclosed above with preferred embodiment, but above preferred embodiment and be not used to limit
The present invention processed, those of ordinary skill in the art, without departing from the spirit and scope of the present invention, all can make various change and profit
Decorations, therefore protection scope of the present invention defines in the range of standard with claim.
Claims (10)
1. a scan drive circuit, for the scan line of cascade is driven operation, it is characterised in that including:
Pull-up control module, for receiving the cascade signal of higher level, and generates corresponding institute according to the cascade signal of described higher level
State the scanning level signal of scan line；
Drive module, for according to described scanning level signal and the clock signal of this grade, draw high corresponding described scan line
The scanning signal of this grade；
Drop-down module, for the scanning signal according to subordinate, drags down the scanning level signal of corresponding described scan line；
Drop-down maintenance module, for maintaining the low level of the scanning level signal of corresponding described scan line；And
Constant voltage low level source, is used for providing drop-down low level；
Wherein said drop-down maintenance module includes the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube and
Ten switching tubes；
The input input low frequency electric potential signal of described 6th switching tube；The control end input low frequency current potential of described 6th switching tube
Signal, the outfan of described 6th switching tube and the first reference point connect；
The end that controls of described 7th switching tube is connected with the output of described pull-up control module, the input of described 7th switching tube
Being connected with described constant voltage low level source, the outfan of described 7th switching tube is connected with described first reference point；
The control end of described 8th switching tube is connected with described first reference point, the input of described 8th switching tube with described on
The output drawing control module connects, and the outfan of described 8th switching tube is connected with the output of described driving module；
The control end of described 9th switching tube is connected with described first reference point, the input of described 9th switching tube and described perseverance
Forcing down level source to connect, the outfan of described 9th switching tube is connected with the output of described driving module；
The control end of described tenth switching tube is connected with described first reference point, the input of described tenth switching tube and described perseverance
Forcing down level source to connect, the outfan of described tenth switching tube is connected with the output of described driving module.
Scan drive circuit the most according to claim 1, it is characterised in that described pull-up control module includes the first switch
Pipe, the cascade signal controlling end input upper level of described first switching tube, the input of described first switching tube is high with constant voltage
Level source connects, and the outfan of described first switching tube exports described scanning level signal.
Scan drive circuit the most according to claim 1, it is characterised in that described driving module include second switch pipe with
And the 3rd switching tube,
The end that controls of described second switch pipe is connected with the output of described pull-up control module, the input of described second switch pipe
Inputting the clock signal of described level, the outfan of described second switch pipe exports the cascade signal of this grade；Described 3rd switch
Pipe control end be connected with the output of described pull-up control module, the input of described 3rd switching tube input described level time
Clock signal, the outfan of described 3rd switching tube exports the scanning signal of this grade.
Scan drive circuit the most according to claim 3, it is characterised in that described scan drive circuit also includes for giving birth to
Become the bootstrap capacitor of the high level of the scanning signal of this grade of described scan line；
Described bootstrap capacitor one end is connected with the output of described pull-up control module, the other end of described bootstrap capacitor and described the
The outfan of three switching tubes connects.
Scan drive circuit the most according to claim 1, it is characterised in that described drop-down module include the 4th switching tube with
And the 5th switching tube；
The end that controls of described 4th switching tube inputs the scanning signal of described next stage, the input of described 4th switching tube and institute
Stating constant voltage low level source to connect, the outfan of described 4th switching tube is connected with the outfan of described first switching tube；
The end that controls of described 5th switching tube inputs the scanning signal of described next stage, the input of described 5th switching tube and institute
Stating constant voltage low level source to connect, the outfan of described 5th switching tube is connected with described driving module outfan.
6. a display device, it is characterised in that include there is data wire and the display panels of scan line and for level
The described scan line of connection is driven the scan drive circuit of operation；Wherein said scan drive circuit includes:
Pull-up control module, for receiving the cascade signal of higher level, and generates corresponding institute according to the cascade signal of described higher level
State the scanning level signal of scan line；
Drive module, for according to described scanning level signal and the clock signal of this grade, draw high corresponding described scan line
The scanning signal of this grade；
Drop-down module, for the scanning signal according to subordinate, drags down the scanning level signal of corresponding described scan line；
Drop-down maintenance module, for maintaining the low level of the scanning level signal of corresponding described scan line；And
Constant voltage low level source, is used for providing drop-down low level；
Wherein said drop-down maintenance module includes the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube and
Ten switching tubes；
The input input low frequency electric potential signal of described 6th switching tube；The control end input low frequency current potential of described 6th switching tube
Signal, the outfan of described 6th switching tube and the first reference point connect；
The end that controls of described 7th switching tube is connected with the output of described pull-up control module, the input of described 7th switching tube
Being connected with described constant voltage low level source, the outfan of described 7th switching tube is connected with described first reference point；
The control end of described 8th switching tube is connected with described first reference point, the input of described 8th switching tube with described on
The output drawing control module connects, and the outfan of described 8th switching tube is connected with the output of described driving module；
The control end of described 9th switching tube is connected with described first reference point, the input of described 9th switching tube and described perseverance
Forcing down level source to connect, the outfan of described 9th switching tube is connected with the output of described driving module；
The control end of described tenth switching tube is connected with described first reference point, the input of described tenth switching tube and described perseverance
Forcing down level source to connect, the outfan of described tenth switching tube is connected with the output of described driving module.
Display device the most according to claim 6, it is characterised in that described pull-up control module includes the first switching tube,
The cascade signal controlling end input upper level of described first switching tube, the input of described first switching tube and constant voltage high level
Source connects, and the outfan of described first switching tube exports described scanning level signal.
Display device the most according to claim 6, it is characterised in that described driving module includes second switch pipe and
Three switching tubes,
The end that controls of described second switch pipe is connected with the output of described pull-up control module, the input of described second switch pipe
Inputting the clock signal of described level, the outfan of described second switch pipe exports the cascade signal of this grade；Described 3rd switch
Pipe control end be connected with the output of described pull-up control module, the input of described 3rd switching tube input described level time
Clock signal, the outfan of described 3rd switching tube exports the scanning signal of this grade.
Display device the most according to claim 8, it is characterised in that described scan drive circuit also includes for generating
State the bootstrap capacitor of the high level of the scanning signal of this grade of scan line；
Described bootstrap capacitor one end is connected with the output of described pull-up control module, the other end of described bootstrap capacitor and described the
The outfan of three switching tubes connects.
Display device the most according to claim 6, it is characterised in that described drop-down module include the 4th switching tube and
5th switching tube；
The end that controls of described 4th switching tube inputs the scanning signal of described next stage, the input of described 4th switching tube and institute
Stating constant voltage low level source to connect, the outfan of described 4th switching tube is connected with the outfan of described first switching tube；
The end that controls of described 5th switching tube inputs the scanning signal of described next stage, the input of described 5th switching tube and institute
Stating constant voltage low level source to connect, the outfan of described 5th switching tube is connected with described driving module outfan.
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| CN201610867947.1A CN106297714B (en) | 2016-09-29 | 2016-09-29 | Scan drive circuit and display device |
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| CN201610867947.1A CN106297714B (en) | 2016-09-29 | 2016-09-29 | Scan drive circuit and display device |
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| CN106297714B CN106297714B (en) | 2018-11-27 |
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| CN106997753A (en) * | 2017-04-07 | 2017-08-01 | 深圳市华星光电技术有限公司 | A kind of GOA drive circuits |
| WO2018223519A1 (en) * | 2017-06-07 | 2018-12-13 | 深圳市华星光电技术有限公司 | Goa drive circuit and liquid crystal display |
| CN110264940A (en) * | 2019-07-16 | 2019-09-20 | 深圳市华星光电半导体显示技术有限公司 | Driving circuit |
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| CN104992682A (en) * | 2015-07-03 | 2015-10-21 | 深圳市华星光电技术有限公司 | Scanning driving circuit |
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| CN104464671A (en) * | 2014-12-12 | 2015-03-25 | 深圳市华星光电技术有限公司 | Scanning drive circuit |
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| WO2018223519A1 (en) * | 2017-06-07 | 2018-12-13 | 深圳市华星光电技术有限公司 | Goa drive circuit and liquid crystal display |
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| Publication number | Publication date |
|---|---|
| CN106297714B (en) | 2018-11-27 |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |