CN107591136B - A kind of gated sweep driving circuit and liquid crystal display device - Google Patents
A kind of gated sweep driving circuit and liquid crystal display device Download PDFInfo
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- CN107591136B CN107591136B CN201710743089.4A CN201710743089A CN107591136B CN 107591136 B CN107591136 B CN 107591136B CN 201710743089 A CN201710743089 A CN 201710743089A CN 107591136 B CN107591136 B CN 107591136B
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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
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Abstract
The invention discloses a kind of gated sweep driving circuit, including cascade multiple drive circuit units, n-th grade of (N >=n >=1, and n is integer) drive circuit unit includes positive and negative sweeping control module, maintenance module and pull-up module；It is positive and negative sweep control module include it is positive and negative sweep pull-up control module and drop-down empty module；It is positive and negative sweep pull-up control module, drop-down empties module, maintenance module and pull-up module and is connected to pull-up control node, maintenance module, pull-up module are connected to the same level scan signal line；The positive and negative path terminal input high level for sweeping pull-up control module, the scanning signal of the positive and negative control terminal input pre-driver circuitry unit for sweeping pull-up control module and the scanning signal of post-stage drive circuit unit；Drop-down empties the clock signal of the control terminal input pre-driver circuitry unit of module, and the path terminal that drop-down empties module is separately connected pull-up control node and low level.
Description
Technical field
The present invention relates to technical field of liquid crystal display more particularly to a kind of gated sweep driving circuits and liquid crystal display to fill
It sets.
Background technique
Liquid crystal display (Liquid Crystal Display, LCD) has thin fuselage, power saving, radiationless etc. numerous excellent
Point, is widely used.Such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen
Curtain or laptop screen etc., occupy an leading position in flat display field.
In some special applications, liquid crystal display needs to have the function of forward and reverse scanning, such as mobile phone
The display picture of screen can normally place display, it is also desirable to display can be inverted, then this requires gated sweep driving circuits
Both top-down scanning can be carried out, also wants that scanning from bottom to top can be carried out.It is common shown in Fig. 1 applied to embedded
Formula touching display screen has the positive and negative gate scanning circuit design drawing for sweeping function, mainly has and positive and negative sweeps control module 1, upper drawing-die
Block 2, touch-control maintenance module 3, maintenance module and other supplementary modules 4, there are also bootstrap capacitor C1.Wherein, positive and negative to sweep function master
Signal U2D is controlled by forward scan and reverse scan controls signal D2U and first film transistor M1 and the 9th film
Transistor M9 element is realized.In forward scan, U2D is high potential, and D2U is low spot position, and first film transistor M1 is responsible for
It pulls up preliminary filling and pulls up control node netAn, the 9th thin film transistor (TFT) M9 is responsible for emptying resetting pull-up control node netAn point；?
When reverse scan, U2D is low potential, and D2U is high point, and first film transistor M1 is responsible for emptying resetting pull-up control node
NetAn, the 9th thin film transistor (TFT) M9 are responsible for pulling up preliminary filling pull-up control node netAn.The main disadvantage of the design is as follows:
1. when forward scan, first film transistor M1 is in long-term negative pressure stress state, it is easy to produce threshold value electricity
Negative sense drift is pressed, when being switched to reverse scan, M1, which can leak electricity, seriously leads to circuit malfunction, otherwise the 9th film when reverse scan
There is also the same problems by transistor M9；
2. needing to increase additional U2D and D2U signal to carry out the positive and negative control for sweeping function.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of gated sweep driving circuit and liquid crystal display device, avoid
The negative sense drift of threshold voltage has an impact drive circuit functionality.
Technical solution provided by the invention is as follows:
The invention discloses a kind of gated sweep driving circuit, including cascade multiple drive circuit units, n-th grade (N >=
N >=1, and n is integer) drive circuit unit includes positive and negative sweeping control module, maintenance module and pull-up module；It is described positive and negative to sweep
Control module include it is positive and negative sweep pull-up control module and drop-down empty module；It is described it is positive and negative sweep pull-up control module, drop-down empty
Module, maintenance module and pull-up module are connected to pull-up control node, and maintenance module, pull-up module are connected to the same level scanning letter
Number line；The positive and negative path terminal input high level for sweeping pull-up control module, the positive and negative control terminal input for sweeping pull-up control module
The scanning signal of pre-driver circuitry unit and the scanning signal of post-stage drive circuit unit；It is described to pull down the control for emptying module
The clock signal of end input pre-driver circuitry unit, the path terminal that the drop-down empties module are separately connected pull-up control node
And low level.
Further, the positive and negative pull-up control module of sweeping includes first film transistor M1A and the 11st film crystal
Pipe M1B；The two paths end of first film transistor M1A is separately connected high level and pull-up control node, and the 11st film is brilliant
The two paths end of body pipe M1B is separately connected high level and pull-up control node；The control terminal of first film transistor M1A inputs
The scanning signal of pre-driver circuitry unit, the control terminal input post-stage drive circuit unit of the 11st thin film transistor (TFT) M1B
Scanning signal, wherein the control terminal of the first film transistor M1A in the 1st grade of drive circuit unit inputs scanning
Trigger signal, the control terminal input scanning triggering of the 11st thin film transistor (TFT) M1B in the N grades of drive circuit units
Signal.
Further, it includes the 9th thin film transistor (TFT) M9 that the drop-down, which empties module,；Two of 9th thin film transistor (TFT) M9
Path terminal is separately connected pull-up control node and low level, and the control terminal of the 9th thin film transistor (TFT) M9 inputs post-stage drive circuit list
The clock signal of member.
Further, the maintenance module includes the 5th thin film transistor (TFT) M5, the 6th thin film transistor (TFT) M6, the 16th film
Transistor M6A, the 26th thin film transistor (TFT) M6B, the 8th thin film transistor (TFT) M8 and the 13rd thin film transistor (TFT) M13；It is described
The control terminal of 5th thin film transistor (TFT) M5 inputs the clock signal or high level of the same level drive circuit unit, the 5th thin film transistor (TFT)
The two paths end of M5 is separately connected high level and a path terminal of the 6th thin film transistor (TFT) M6；6th thin film transistor (TFT) M6's
Another path terminal connects low level, the control terminal connection pull-up control node of the 6th thin film transistor (TFT) M6；16th film is brilliant
The scanning signal of the control terminal input pre-driver circuitry unit of body pipe M6A, the two paths end of the 16th thin film transistor (TFT) M6A
It is separately connected and maintains control node and low level；The control terminal of 26th thin film transistor (TFT) M6B inputs post-stage drive circuit list
The scanning signal of member, the two paths end of the 26th thin film transistor (TFT) M6B, which is separately connected, maintains control node and low level；The
The control terminal connection of eight thin film transistor (TFT) M8 maintains control node, and two path terminals of the 8th thin film transistor (TFT) M8 are separately connected pull-up
Control node and low level；The control terminal connection of 13rd thin film transistor (TFT) M13 maintains control node, the 13rd thin film transistor (TFT)
Two path terminals of M13 are separately connected the same level scan signal line and low level；Or the 8th thin film transistor (TFT) M8 control terminal input this
The clock signal of stage drive circuit unit, two path terminals of the 8th thin film transistor (TFT) M8 are separately connected pull-up control node and the same level
Scan signal line, the two paths end of the 13rd thin film transistor (TFT) M13 are separately connected the same level scan signal line and low level, and the tenth
The control terminal connection of three thin film transistor (TFT) M13 maintains control node.
It further, further include emptying resetting module；The resetting module that empties includes the second thin film transistor (TFT) M2, third
Thin film transistor (TFT) M3 and the 12nd thin film transistor (TFT) M12；The two paths end of the second thin film transistor (TFT) M2 is separately connected
Control node and low level are drawn, the control terminal input of the second thin film transistor (TFT) M2 empties reset signal；The third film crystal
The two paths end of pipe M3, which is separately connected, maintains control node and low level, and the control terminal input of third thin film transistor (TFT) M3 empties
Reset signal；The two paths end of 12nd thin film transistor (TFT) M12 is separately connected the same level scan signal line and low level, and the 12nd
The control terminal input of thin film transistor (TFT) M12 empties reset signal.
Further, the pull-up module includes the tenth thin film transistor (TFT) M10；Two of tenth thin film transistor (TFT) M10 are logical
Terminal is separately connected the clock signal and the same level scan signal line of the same level drive circuit unit, the control of the tenth thin film transistor (TFT) M10
Connection pull-up control node in end processed.
It further, further include touch-control maintenance module；The touch-control maintenance module connects the same level scan signal line and low electricity
Flat, touch-control maintenance module inputs touch-control and maintains control signal.
Further, the touch-control maintenance module includes the 14th thin film transistor (TFT) M14；14th thin film transistor (TFT) M14
Two paths end be separately connected the same level scan signal line and low level, the control terminal of the 14th thin film transistor (TFT) M14 inputs touching
Control maintains control signal.
Further, drive circuit unit further includes bootstrap capacitor, bootstrap capacitor one end connection pull-up control node,
The other end connects the same level scan signal line.
The invention also discloses a kind of liquid crystal display devices, including above-mentioned gated sweep driving circuit.
Compared with prior art, the positive and negative path terminal input high level for sweeping control module of the invention, before control terminal input
The scanning signal of stage drive circuit unit and the scanning signal of post-stage drive circuit unit increase forward scan control without additional
Signal and reverse scan control signal come carry out it is positive and negative sweep function, the device threshold that forward and reverse scanning is controlled in circuit can be improved
The drift of voltage negative sense leads to circuit malfunction problem, meanwhile, positive counter-scanning is realized by sequential control circuit, reduces control signal
Quantity, so that circuit structure is more simple.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, the present invention is given furtherly
It is bright.
Fig. 1 is embedded touch display screen with the positive and negative gate scanning circuit design drawing for sweeping function；
Fig. 2 is a kind of circuit diagram of the embodiment one of gated sweep driving circuit of the present invention；
Fig. 3 is a kind of circuit diagram of another embodiment of gated sweep driving circuit of the present invention；
Drive waveforms schematic diagram when Fig. 4 is a kind of gated sweep driving circuit forward scan of the invention；
Drive waveforms schematic diagram when Fig. 5 is a kind of gated sweep driving circuit reverse scan of the invention.
Drawing reference numeral explanation:
01, positive and negative to sweep pull-up control module, 02, drop-down empty module, 03, pull-up module, 04, maintenance module, 05, empty
Reset module, 06, touch-control maintenance module；
M1A, first film transistor, M1B, the 11st thin film transistor (TFT), M2, the second thin film transistor (TFT), M3, third film
Transistor, M5, the 5th thin film transistor (TFT), M6, the 6th thin film transistor (TFT), M6A, the 16th thin film transistor (TFT), M6B, the 26th
Thin film transistor (TFT), M8, the 8th thin film transistor (TFT), M9, the 9th thin film transistor (TFT), M10, the tenth thin film transistor (TFT), M12, the 12nd
Thin film transistor (TFT), M13, the 13rd thin film transistor (TFT), M14, the 14th thin film transistor (TFT), C1, bootstrap capacitor；
The scanning signal of Gn, the same level drive circuit unit, netAn, pull-up control node, netBn, maintain control node,
VGH, high level, VSS, low level, the clock signal of CKm, the same level drive circuit unit, CKm+4, post-stage drive circuit unit
Clock signal, the scanning signal of Gn-2, pre-driver circuitry unit, the scanning signal of Gn+2, post-stage drive circuit unit, TC1,
Touch-control maintains control signal, CLR, empties reset signal.
Specific embodiment
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below
A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented
Its practical structures as product.In addition, there is identical structure or function in some figures so that simplified form is easy to understand
Component only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not only indicated
" only this ", can also indicate the situation of " more than one ".
The present invention discloses a kind of gated sweep driving circuit, including the cascade multiple drive circuit units of N, n-th grade of (N >=n
>=1, and n is positive integer) drive circuit unit includes positive and negative sweeping control module, maintenance module 04 and pull-up module 03；It is described
It is positive and negative sweep control module include it is positive and negative sweep pull-up control module 01 and drop-down empty module 02；It is described positive and negative to sweep pull-up control module
01, drop-down empties module 02, maintenance module 04 and pull-up module 03 and is connected to pull-up control node netAn, maintenance module 04
The same level scan signal line Gn is connected to pull-up module 03；The positive and negative path terminal input high level for sweeping pull-up control module 01
VGH, the scanning signal and post-stage drive circuit of the positive and negative control terminal input pre-driver circuitry unit for sweeping pull-up control module 01
The scanning signal of unit；The drop-down empties the clock signal of the control terminal input pre-driver circuitry unit of module 02, described
The path terminal that drop-down empties module 02 is separately connected pull-up control node netAn and low level VSS.
Specifically, it is described it is positive and negative sweep control module mainly and include positive and negative sweep pull-up control module 01 and drop-down empties module 02
Two parts, positive and negative pull-up control module 01 of sweeping can receive the scanning signal (being expressed as Gn-2) of pre-driver circuitry unit simultaneously
With the scanning signal (being expressed as Gn+2) of post-stage drive circuit unit, and path terminal connects high level VGH, by circuit design and
Timing arranges in pairs or groups to realize the function of positive counter-scanning, and drop-down is emptied module and is responsible for using clock signal to pull-up control node netAn
It is emptied, compared with prior art, reduces driving signal, while preventing reverse leakage.
Pull-up module 03 by the scanning signal that the same level scan signal line exports the same level drive circuit unit for (being expressed as
Gn), at the same be also used to pull down empty the same level scan signal line.
Maintenance module 04 is used for pull-up control node netAn and the same level scanning between inaction period inside holding circuit
Signal wire makes that pull-up control node netAn and the same level scan signal line is maintained to maintain stable low potential without by other
The interference of signal, to ensure circuit reliability with higher.
Preferably, above-mentioned technical proposal is improved, obtains improved plan, a kind of gated sweep driving circuit is gone back
Including emptying resetting module 05 and bootstrap capacitor C1, the resetting module 05 that empties is using emptying reset signal CLR in every frame knot
The pull-up control node netAn of circuit is emptied when beam and switching on and shutting down, maintains control node netBn and the same level scanning letter
Number line.
The bootstrap capacitor C1 is connected between pull-up control node netAn and the same level scan signal line, for acting on
Period lifting and the current potential for stablizing pull-up control node netAn, so that there is pull-up module 03 enough Current Zones to drive the same level
Scan signal line.
Preferably, above-mentioned technical proposal is improved, obtains improved plan, a kind of gated sweep driving circuit is gone back
Including touch-control maintenance module 06, the touch-control maintains mould 06 to connect the same level scan signal line and low level VSS, touch-control maintenance module
06 input touch-control maintains control signal TC1.When touch-control scanning, normal driving signal can be closed, and touch-control maintains control signal
TC1, which can be drawn high, maintains the same level scan signal line, to prevent the sensor of touch-control from generating biggish coupling to controlling grid scan line
Cooperation is used and influences picture and show and touch detection.It should be noted that touch-control maintenance module 06 of the present invention is suitable for interior
The gated sweep driving circuit of embedded touching display screen can then remove touch-control if common non-embedded touch display screen
Maintenance module 06.
In the present embodiment, Gn+2 is the scanning signal of the rear two-stage drive circuit unit of the same level drive circuit unit, real
On border, as long as scanning signal such as Gn+1, Gn+3, Gn+5 etc. of the drive circuit unit later of the same level drive circuit unit can be fitted
For the present invention.Similarly scanning signal such as Gn-1, Gn-3, Gn-5 of the drive circuit unit before the same level drive circuit unit
Deng Gn-2 in also alternative the present embodiment.The similarly clock signal in post-stage drive circuit unit as described in the examples later
CKm+4。
It should be noted that resetting module 05, bootstrap capacitor C1 and the touch-control maintenance module 06 of the present invention of emptying is
Whether the functional module added according to actual needs is not construed as limiting in circuit comprising above-mentioned module, while in order to meet reality
Border needs that other function module can also be increased, and conventional func improvement on this basis should all fall into protection model of the invention
It encloses.
Each thin film transistor (TFT) includes control terminal and two paths end, and in the present embodiment, control terminal is grid, wherein
One path terminal is source electrode, another path terminal is drain electrode.When giving control terminal high level, source electrode and drain electrode passes through semiconductor layer
Connection gives pixel electrode signal with this.
Technical solution of the present invention is discussed in detail with specific embodiment below.
Fig. 2 is a kind of circuit diagram of the embodiment one of gated sweep driving circuit of the present invention.As shown in Fig. 2, a kind of
Gated sweep driving circuit, including cascade multiple drive circuit units, drive circuit unit include it is positive and negative sweep control module, on
Drawing-die block 03, maintenance module 04 empty resetting module 05, touch-control maintenance module 06 and bootstrap capacitor C1.
It is positive and negative sweep control module include it is positive and negative sweep pull-up control module 01 and drop-down empty module 02.
Specifically, positive and negative pull-up control module 01 of sweeping includes first film transistor M1A and the 11st thin film transistor (TFT)
M1B.The two paths end of first film transistor M1A is separately connected high level VGH and pulls up control node netAn, and the 11st
The two paths end of thin film transistor (TFT) M1B is separately connected high level VGH and pull-up control node netAn, first film transistor
The control terminal input of the scanning signal Gn-2, the 11st thin film transistor (TFT) M1B of the control terminal input pre-driver circuitry unit of M1A
The scanning signal Gn+2 of post-stage drive circuit unit, wherein the first film crystal in the 1st grade of drive circuit unit
The control terminal input of pipe M1A scans trigger signal GSP1, the 11st film crystal in the N grades of drive circuit units
The control terminal input scanning trigger signal GSP1 of pipe M1B.First film transistor M1A be used in forward scan to netAn into
Row preliminary filling, the 11st thin film transistor (TFT) M1B are used to carry out preliminary filling to pull-up control node netAn in reverse scan.
It includes the 9th thin film transistor (TFT) M9 that drop-down, which empties module 02, and the two paths end of the 9th thin film transistor (TFT) M9 connects respectively
Connect the control terminal input post-stage drive circuit unit for drawing control node netAn and low level VSS, the 9th thin film transistor (TFT) M9
Clock signal (is expressed as CKm+4), and main function is to carry out drop-down to pull-up control node netAn to empty.In forward scan
The same level clock signal (CK7) of afterbody drive circuit unit starts after the CK3 of the control terminal of the 9th thin film transistor (TFT) M9,
So only the first order can normally start output realization forward scan；Conversely, the first stage drive circuit list in reverse scan
The same level clock CK1 of member starts after the CK5 of the 9th thin film transistor (TFT) M9 control terminal, so afterbody circuit can be opened normally
Reverse scan is realized in dynamic output.
Pull-up module 03 includes the tenth thin film transistor (TFT) M10, and the two paths end of the tenth thin film transistor (TFT) M10 is separately connected
In the control terminal connection of the clock signal CKm and the same level scan signal line of the same level drive circuit unit, the tenth thin film transistor (TFT) M10
Control node netAn, the tenth thin film transistor (TFT) M10 is drawn to be used to carry out the same level scan signal line pull-up output and drop-down clearly
It is empty.
Maintenance module 04 include the 5th thin film transistor (TFT) M5, the 6th thin film transistor (TFT) M6, the 16th thin film transistor (TFT) M6A,
26th thin film transistor (TFT) M6B, the 8th thin film transistor (TFT) M8 and the 13rd thin film transistor (TFT) M13.
The two paths end of control terminal the input high level VGH, the 5th thin film transistor (TFT) M5 of 5th thin film transistor (TFT) M5 point
Not Lian Jie high level VGH and the 6th thin film transistor (TFT) M6 a path terminal.5th thin film transistor (TFT) M5 is used to control maintenance
Node netBn charges.It should be noted that above-mentioned 5th thin film transistor (TFT) M5 is improved, it can also be thin by the 5th
The control terminal of film transistor M5 inputs the clock signal CKm of the same level drive circuit unit or the clock of other stage drive circuit units
Signal, beneficial effect is can be to avoid generating biggish loop current between high level VGH and low level VSS.
Another path terminal of 6th thin film transistor (TFT) M6 connects low level VSS, the control terminal of the 6th thin film transistor (TFT) M6
Connection pull-up control node netAn.6th thin film transistor (TFT) M6 is used for using pull-up control node netAn to maintenance control node
NetBn carries out dragging down effect, it is ensured that maintains control node netBn not influence pull-up control node netAn and draws high.
The scanning signal Gn-2 of the control terminal input pre-driver circuitry unit of 16th thin film transistor (TFT) M6A, the 16th
The two paths end of thin film transistor (TFT) M6A, which is separately connected, maintains control node netBn and low level VSS.16th film crystal
Pipe M6A be used in forward scan using the scanning signal Gn-2 of pre-driver circuitry unit to maintain control node netBn into
Row drags down effect, it is ensured that maintains control node netBn not influence pull-up control node netAn and draws high.
The scanning signal Gn+2 of the control terminal input post-stage drive circuit unit of 26th thin film transistor (TFT) M6B, second
The two paths end of 16 thin film transistor (TFT) M6B, which is separately connected, maintains control node netBn and low level VSS.26th is thin
Film transistor M6B is used in reverse scan using the scanning signal Gn+2 of post-stage drive circuit unit to maintenance control node
NetBn carries out dragging down effect, it is ensured that maintains control node netBn not influence pull-up control node netAn and draws high.
The control terminal connection of 8th thin film transistor (TFT) M8 maintains control node netBn, and the two of the 8th thin film transistor (TFT) M8 are logical
Terminal is separately connected pull-up control node netAn and low level VSS.8th thin film transistor (TFT) M8 is used for pull-up control node
NetAn is maintained.
The control terminal connection of 13rd thin film transistor (TFT) M13 maintains control node netBn, the 13rd thin film transistor (TFT) M13
Two path terminals be separately connected the same level scan signal line and low level VSS.13rd thin film transistor (TFT) M13 is used to scan the same level
Signal wire is maintained.
Emptying resetting module 05 includes the second thin film transistor (TFT) M2, third thin film transistor (TFT) M3 and the 12nd thin film transistor (TFT)
M12.The two paths end of the second thin film transistor (TFT) M2 is separately connected pull-up control node netAn and low level VSS, and second
The control terminal input of thin film transistor (TFT) M2 empties reset signal CLR, and the second thin film transistor (TFT) M2 is for emptying resetting pull-up control
Node netAn.The two paths end of the third thin film transistor (TFT) M3, which is separately connected, maintains control node netBn and low level
The control terminal input of VSS, third thin film transistor (TFT) M3 empty reset signal CLR, and third thin film transistor (TFT) M3 is for emptying resetting
Maintain control node netBn.The two paths end of 12nd thin film transistor (TFT) M12 is separately connected the same level scan signal line and low electricity
The control terminal input of flat VSS, the 12nd thin film transistor (TFT) M12 empty reset signal CLR, and the 12nd thin film transistor (TFT) M12 is used for
Empty resetting the same level scan signal line.
Touch-control maintenance module 06 includes the 14th thin film transistor (TFT) M14, the two paths end of the 14th thin film transistor (TFT) M14
The control terminal input touch-control for being separately connected the same level scan signal line and low level VSS, the 14th thin film transistor (TFT) M14 maintains control
Signal TC1, the 14th thin film transistor (TFT) M14 are for maintaining the same level scan signal line during touch-control scanning.
Drive circuit unit further includes bootstrap capacitor C1, and the connection of the one end the bootstrap capacitor C1 pulls up control node netAn,
The other end connects the same level scan signal line, is used for during the output of the same level scan signal line to pull-up control node netAn current potential
It is lifted.
Preferably, Fig. 3 is a kind of circuit diagram of another embodiment of gated sweep driving circuit of the present invention, as shown in figure 3,
Above-described embodiment is improved, the connection of above-mentioned 8th thin film transistor (TFT) M8 and the 13rd thin film transistor (TFT) M13 is changed
Into wherein the control terminal of the 8th thin film transistor (TFT) M8 inputs the clock signal CKm of the same level drive circuit unit, the 8th film crystal
Two path terminals of pipe M8 are separately connected pull-up control node netAn and the same level scan signal line, the 13rd thin film transistor (TFT) M13's
Two paths end is separately connected the same level scan signal line and the control terminal connection dimension of low level VSS, the 13rd thin film transistor (TFT) M13
Hold control node netBn.
Meanwhile the 12nd thin film transistor (TFT) M12 is got rid of, the 12nd film is realized by the 14th thin film transistor (TFT) M14
The function of transistor M12.
Drive waveforms schematic diagram when Fig. 4 is a kind of gated sweep driving circuit forward scan of the invention.Interlocked with left and right
For the driving framework of the unilateral driving method of formula, as shown in figure 4, each signal is as follows:
GSP1 is scanning trigger signal, while being responsible for being started in forward scan and reverse scan；
CK1, CK3, CK5, CK7 are the clock signals of driving, and when forward scan sequentially exports；
Touch-control during TC1 is touch-control maintains control signal, for maintaining the same level scan signal line during touch-control；
VGH is constant pressure high potential control signal, is the high level in the present embodiment；
VSS is constant pressure low potential control signal, is the low level in the present embodiment；
CLR is to empty reset signal, is mainly responsible for and carries out electricity to circuit internal node in every frame end and switching on and shutting down
Lotus empties.
Other shown waveforms such as netA1, netA2, netAlast-1, netAlast are the output waves of circuit internal node
Shape, G1, G2 and Glast are respectively the waveform of the scanning signal of drive circuit unit outputs at different levels.
Drive waveforms schematic diagram when Fig. 5 is a kind of gated sweep driving circuit reverse scan of the invention.Interlocked with left and right
For the driving framework of the unilateral driving method of formula, as shown in figure 5, each signal is as follows:
GSP1 is scanning trigger signal, while being responsible for being started in forward scan and reverse scan；
CK1, CK3, CK5, CK7 are the clock signals of driving, and inverted order exports when reverse scan；
Touch-control during TC1 is touch-control maintains control signal, for maintaining the same level scan signal line during touch-control；
VGH is constant pressure high potential control signal, is the high level in the present embodiment；
VSS is constant pressure low potential control signal, is the low level in the present embodiment；
CLR is to empty reset signal, is mainly responsible for and carries out electricity to circuit internal node in every frame end and switching on and shutting down
Lotus empties.
Other shown waveforms such as netA1, netA2, netAlast-1, netAlast are the output waves of circuit internal node
Shape, G1, G2 and Glast are respectively the waveform of the scanning signal of drive circuit unit outputs at different levels.
It should be noted that circuit diagram involved in above-described embodiment is single level-one electricity under interlace driving framework
Road, the i.e. unilateral driving method of left and right alternating expression, but the application of gated sweep driving circuit of the present invention is not limited only to which,
It can be adapted for the driving framework of arbitrary patterns.
The invention also discloses a kind of liquid crystal display device, including above-mentioned gated sweep driving circuit, which is driven
Dynamic circuit can be unilateral driving method, be also possible to bilateral driving method.
It should be noted that above-described embodiment can be freely combined as needed.The above is only of the invention preferred
Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (9)
1. a kind of gated sweep driving circuit, which is characterized in that including cascade N number of drive circuit unit, n-th grade (N >=n >=
1, and n is integer) drive circuit unit includes positive and negative sweeping control module, maintenance module and pull-up module；It is described positive and negative to sweep control
Molding block include it is positive and negative sweep pull-up control module and drop-down empty module；It is described it is positive and negative sweep pull-up control module, drop-down empty mould
Block, maintenance module and pull-up module are connected to pull-up control node, and maintenance module, pull-up module are connected to the same level scanning signal
Line；
The positive and negative path terminal input high level for sweeping pull-up control module, before the positive and negative control terminal input for sweeping pull-up control module
The scanning signal of stage drive circuit unit and the scanning signal of post-stage drive circuit unit；It is described to pull down the control terminal for emptying module
Input pre-driver circuitry unit clock signal, it is described pull down empty module path terminal be separately connected pull-up control node and
Low level；
The positive and negative pull-up control module of sweeping includes first film transistor and the 11st thin film transistor (TFT)；First film transistor
Two paths end be separately connected high level and pull-up control node, the two paths end of the 11st thin film transistor (TFT) is separately connected
High level and pull-up control node；The scanning signal of the control terminal input pre-driver circuitry unit of first film transistor, the
The scanning signal of the control terminal input post-stage drive circuit unit of 11 thin film transistor (TFT)s, wherein the 1st grade of driving circuit list
The control terminal input of the first film transistor in member scans trigger signal, the institute in the N grades of drive circuit units
State the control terminal input scanning trigger signal of the 11st thin film transistor (TFT).
2. gated sweep driving circuit as described in claim 1, which is characterized in that it includes the 9th thin that the drop-down, which empties module,
Film transistor；The two paths end of 9th thin film transistor (TFT) is separately connected pull-up control node and low level, the 9th film crystal
The clock signal of the control terminal input post-stage drive circuit unit of pipe.
3. gated sweep driving circuit as described in claim 1, which is characterized in that the maintenance module includes that the 5th film is brilliant
Body pipe, the 6th thin film transistor (TFT), the 16th thin film transistor (TFT), the 26th thin film transistor (TFT), the 8th thin film transistor (TFT) and
13 thin film transistor (TFT)s；
The control terminal of 5th thin film transistor (TFT) inputs the clock signal or high level of the same level drive circuit unit, the 5th film
The two paths end of transistor is separately connected a path terminal of high level and the 6th thin film transistor (TFT)；
Another path terminal of 6th thin film transistor (TFT) connects low level, the control terminal connection pull-up control of the 6th thin film transistor (TFT)
Node；
The scanning signal of the control terminal input pre-driver circuitry unit of 16th thin film transistor (TFT), the 16th thin film transistor (TFT)
Two paths end, which is separately connected, maintains control node and low level；
The scanning signal of the control terminal input post-stage drive circuit unit of 26th thin film transistor (TFT), the 26th film crystal
The two paths end of pipe, which is separately connected, maintains control node and low level；
The control terminal connection of 8th thin film transistor (TFT) maintains control node, and two path terminals of the 8th thin film transistor (TFT) are separately connected
Draw control node and low level；
The control terminal connection of 13rd thin film transistor (TFT) maintains control node, and two path terminals of the 13rd thin film transistor (TFT) connect respectively
Connect the same level scan signal line and low level；
Or the 8th the control terminal of thin film transistor (TFT) input the clock signal of the same level drive circuit unit, the two of the 8th thin film transistor (TFT)
Path terminal is separately connected pull-up control node and the same level scan signal line, the two paths end of the 13rd thin film transistor (TFT) connect respectively
The same level scan signal line and low level are connect, the control terminal connection of the 13rd thin film transistor (TFT) maintains control node.
4. gated sweep driving circuit as described in claim 1, which is characterized in that further include emptying resetting module；It is described clear
It includes the second thin film transistor (TFT), third thin film transistor (TFT) and the 12nd thin film transistor (TFT) that bare weight, which sets module,；Second film is brilliant
The two paths end of body pipe is separately connected pull-up control node and low level, and the control terminal input of the second thin film transistor (TFT) empties weight
Confidence number；The two paths end of the third thin film transistor (TFT), which is separately connected, maintains control node and low level, and third film is brilliant
The control terminal input of body pipe empties reset signal；The two paths end of 12nd thin film transistor (TFT) is separately connected the same level scanning signal
The control terminal input of line and low level, the 12nd thin film transistor (TFT) empties reset signal.
5. gated sweep driving circuit as described in claim 1, which is characterized in that the pull-up module includes that the tenth film is brilliant
Body pipe；The two paths end of tenth thin film transistor (TFT) is separately connected the clock signal and the same level scanning letter of the same level drive circuit unit
Number line, the control terminal connection pull-up control node of the tenth thin film transistor (TFT).
6. gated sweep driving circuit as described in claim 1, which is characterized in that further include touch-control maintenance module；The touching
Control maintenance module is separately connected the same level scan signal line and low level, and touch-control maintenance module inputs touch-control and maintains control signal.
7. gated sweep driving circuit as claimed in claim 6, which is characterized in that the touch-control maintenance module includes the 14th
Thin film transistor (TFT)；The two paths end of 14th thin film transistor (TFT) is separately connected the same level scan signal line and low level, and the 14th
The control terminal input touch-control of thin film transistor (TFT) maintains control signal.
8. gated sweep driving circuit as described in claim 1, which is characterized in that drive circuit unit further includes bootstrapping electricity
Hold, bootstrap capacitor one end connection pull-up control node, the other end connects the same level scan signal line.
9. a kind of liquid crystal display device, which is characterized in that driven including gated sweep described in the claims 1-8 any one
Dynamic circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710743089.4A CN107591136B (en) | 2017-08-25 | 2017-08-25 | A kind of gated sweep driving circuit and liquid crystal display device |
| PCT/CN2018/082360 WO2019037435A1 (en) | 2017-08-25 | 2018-04-09 | Gate drive unit circuit, gate drive circuit and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710743089.4A CN107591136B (en) | 2017-08-25 | 2017-08-25 | A kind of gated sweep driving circuit and liquid crystal display device |
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| Publication Number | Publication Date |
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| CN107591136A CN107591136A (en) | 2018-01-16 |
| CN107591136B true CN107591136B (en) | 2019-03-19 |
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| CN201710743089.4A Active CN107591136B (en) | 2017-08-25 | 2017-08-25 | A kind of gated sweep driving circuit and liquid crystal display device |
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| WO (1) | WO2019037435A1 (en) |
Families Citing this family (10)
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| CN107591136B (en) * | 2017-08-25 | 2019-03-19 | 南京中电熊猫平板显示科技有限公司 | A kind of gated sweep driving circuit and liquid crystal display device |
| CN108399899A (en) * | 2018-01-29 | 2018-08-14 | 南京中电熊猫平板显示科技有限公司 | A kind of bilateral scanning gate driving circuit |
| CN108389554B (en) * | 2018-01-29 | 2020-11-06 | 南京中电熊猫液晶显示科技有限公司 | Grid scanning driving circuit and liquid crystal display device |
| CN108538268B (en) * | 2018-04-20 | 2020-08-04 | 南京中电熊猫液晶显示科技有限公司 | Bidirectional scanning grid driving circuit |
| CN108665867B (en) * | 2018-05-30 | 2020-08-04 | 南京中电熊猫平板显示科技有限公司 | Grid scanning driving circuit |
| CN109637484B (en) * | 2019-01-23 | 2020-12-25 | 南京中电熊猫液晶显示科技有限公司 | Gate driving unit circuit, gate driving circuit and display device |
| CN110379352B (en) * | 2019-08-07 | 2022-02-01 | 京东方科技集团股份有限公司 | Shifting register, driving method thereof and grid driving circuit |
| CN111179871B (en) * | 2020-02-12 | 2021-01-15 | 武汉华星光电技术有限公司 | GOA circuit and display panel thereof |
| CN111681589B (en) * | 2020-06-17 | 2022-10-04 | 武汉华星光电技术有限公司 | GOA circuit and display panel |
| CN113257168B (en) * | 2021-05-18 | 2022-07-12 | 武汉华星光电技术有限公司 | Grid driving circuit and display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI353575B (en) * | 2006-12-29 | 2011-12-01 | Novatek Microelectronics Corp | Gate driver structure of tft-lcd display |
| CN104766584B (en) * | 2015-04-27 | 2017-03-01 | 深圳市华星光电技术有限公司 | There is the GOA circuit of forward and reverse scan function |
| CN104992682B (en) * | 2015-07-03 | 2017-10-24 | 深圳市华星光电技术有限公司 | A kind of scan drive circuit |
| CN106128379B (en) * | 2016-08-08 | 2019-01-15 | 武汉华星光电技术有限公司 | GOA circuit |
| CN106448585A (en) * | 2016-09-23 | 2017-02-22 | 南京华东电子信息科技股份有限公司 | Grid electrode driving circuit with forward and reverse scanning function |
| CN106251820B (en) * | 2016-09-23 | 2018-12-21 | 南京华东电子信息科技股份有限公司 | Gate driving circuit for in-cell touching display screen |
| CN106652933B (en) * | 2016-11-18 | 2021-02-26 | 南京中电熊猫液晶显示科技有限公司 | Grid drive circuit with forward and reverse scanning function |
| CN106486075B (en) * | 2016-12-27 | 2019-01-22 | 武汉华星光电技术有限公司 | GOA circuit |
| CN106601169B (en) * | 2016-12-29 | 2019-08-02 | 南京华东电子信息科技股份有限公司 | Bilateral scanning gate driving circuit |
| CN106991986B (en) * | 2017-05-15 | 2019-07-12 | 南京中电熊猫平板显示科技有限公司 | A kind of bilateral scanning gate driving circuit |
| CN107591136B (en) * | 2017-08-25 | 2019-03-19 | 南京中电熊猫平板显示科技有限公司 | A kind of gated sweep driving circuit and liquid crystal display device |
-
2017
- 2017-08-25 CN CN201710743089.4A patent/CN107591136B/en active Active
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2018
- 2018-04-09 WO PCT/CN2018/082360 patent/WO2019037435A1/en active Application Filing
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| CN107591136A (en) | 2018-01-16 |
| WO2019037435A1 (en) | 2019-02-28 |
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