CN108062938A - Shift register cell and its driving method, gate driving circuit, display device - Google Patents
Shift register cell and its driving method, gate driving circuit, display device Download PDFInfo
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- CN108062938A CN108062938A CN201810012061.8A CN201810012061A CN108062938A CN 108062938 A CN108062938 A CN 108062938A CN 201810012061 A CN201810012061 A CN 201810012061A CN 108062938 A CN108062938 A CN 108062938A
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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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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
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- Crystallography & Structural Chemistry (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
The disclosure provides a kind of shift register cell and its driving method, gate driving circuit and display device, is related to display technology field.The shift register cell includes：Input module responds input signal so that the first power supply signal is transmitted to pull-up node；Reseting module, reset signal after operating lag is with by second source signal transmission to pull-up node；Output module responds the signal of pull-up node with by clock signal transmission to signal output part；First drop-down control module, responds the signal of pull-up node so that the 3rd power supply signal is transmitted to pull-down node；Second drop-down control module, responds the 4th power supply signal so that the 4th power supply signal is transmitted to pull-down node；Module is pulled down, responds the signal of pull-down node so that the 3rd power supply signal is transmitted separately to pull-up node and signal output part；The shift register cell is the corresponding shift register cell of touch-control scan line.It is slow that the disclosure can solve the problems, such as that the corresponding gate drive signal of touch-control scan line declines.
Description
Technical field
This disclosure relates to display technology field more particularly to a kind of shift register cell and its driving method, grid drive
Dynamic circuit and display device.
Background technology
(Thin Film Transistor-Liquid Crystal Display, Thin Film Transistors-LCD are shown TFT-LCD
Show device) display of image is realized using the progressive scan mode of M × N picture element matrixs.The display driver of TFT-LCD mainly wraps
Gate drivers and data driver are included, clock signal can be converted to apply by wherein gate drivers by shift register
The grid line of liquid crystal display panel is added to, so as to export gate drive signal to corresponding grid line, to realize that it progressively scans work(
Energy.
In TDDI (Touch and Display Driver Intergation, touch-control and the raster data model of such as 120Hz
Device integrates) in the application of product, touching signals line can be increased in the particular row of gate driving circuit, this was resulted in the touch-control stage
Having the shift register cell of fixed several rows needs to keep current state, until touch-control terminates to recover to work normally.But
During this period, since the charging capacitor in retainer member such as shift register cell can generate electric leakage so that pull-up node is beaten
It opens and is not enough, therefore the corresponding gate drive signal waveform distortion of this row clock signal will be caused；Meanwhile drop-down saves this moment
Point is also not up to operating voltage, i.e., entire shift register cell can not also carry out putting action of making an uproar, but output transistor is
Shut-off so will result in signal output part this moment as floating state, tighter so as to cause the waveform of gate drive signal
The distortion of weight is such as presented as that decline is slow.
It should be noted that information is only used for strengthening the reason to the background of the disclosure disclosed in above-mentioned background section
Solution, therefore can include not forming the information to the prior art known to persons of ordinary skill in the art.
The content of the invention
The disclosure be designed to provide a kind of shift register cell and its driving method, gate driving circuit and
Display device, the gate drive signal decline for solving the corresponding shift register cell of touch-control scan line are slowly asked
Topic.
Other characteristics and advantage of the disclosure will be by the following detailed description apparent from or partially by the disclosure
Practice and acquistion.
According to one aspect of the disclosure, a kind of shift register cell is provided, including：
Input module, connection input signal end, the first power supply signal end and pull-up node, for responding input signal
The first power supply signal is transmitted to the pull-up node；
Reseting module, connection reset signal end, second source signal end, the 3rd power supply signal end and the pull-up section
Point, the reseting module include reset unit and delay cell, the delay cell be connected to the reset signal end with it is described
To postpone to reset signal between 3rd power supply signal end, the reset unit be used for operating lag after reset signal with
By second source signal transmission to the pull-up node；
Output module connects the pull-up node, clock signal terminal and signal output part, for responding the pull-up
The voltage signal of node is with by clock signal transmission to the signal output part；
First drop-down control module, connects the pull-up node, the 3rd power supply signal end and pull-down node, uses
In the voltage signal for responding the pull-up node the 3rd power supply signal is transmitted to the pull-down node；
Second drop-down control module, connects the 4th power supply signal end and the pull-down node, for responding the 4th power supply letter
Number the 4th power supply signal is transmitted to the pull-down node；
Module is pulled down, connects the pull-down node, the 3rd power supply signal end, the pull-up node and the letter
Number output terminal, for responding the voltage signal of the pull-down node so that the 3rd power supply signal is transmitted separately to the pull-up
Node and the signal output part；
Wherein, the shift register cell is the corresponding shift register cell of touch-control scan line.
In a kind of exemplary embodiment of the disclosure, the reset unit includes reset switch element, the reset switch
On the control terminal of element connects the reset signal end, first end connects the second source signal end, second end connection is described
Draw node；
The delay cell includes delay electric capacity, and the delay electric capacity is connected to the reset signal end and the described 3rd electricity
Between source signal end.
In a kind of exemplary embodiment of the disclosure, the input module includes input switch element, the input switch
On the control terminal of element connects the input signal end, first end connects the first power supply signal end, second end connection is described
Draw node.
In a kind of exemplary embodiment of the disclosure, the output module includes output switch element and charging capacitor；
The control terminal of the output switch element connects the pull-up node, first end connects the clock signal terminal, the
Two ends connect the signal output part；
The charging capacitor is connected between the pull-up node and the signal output part.
In a kind of exemplary embodiment of the disclosure, it is described first drop-down control module include first control switch element and
Second control switch element；
The control terminal of the first control switch element connects the pull-up node, first end connects the 3rd power supply letter
Number end, second end connection drop-down control node；
The control terminal of the second control switch element connects the pull-up node, first end connects the 3rd power supply letter
Number end, second end connect the pull-down node.
In a kind of exemplary embodiment of the disclosure, it is described second drop-down control module include the 3rd control switch element and
4th control switch element；
The control terminal of the 3rd control switch element connects the 4th power supply signal end, second end connection with first end
The drop-down control node；
The control terminal connection drop-down control node, the first end of the control switch element connect the 4th power supply
Signal end, second end connect the pull-down node.
In a kind of exemplary embodiment of the disclosure, it is described drop-down module include first pull down switch element and second pull down
Switch element；
Described first control terminal for pulling down switch element connects the pull-down node, first end connects the 3rd power supply letter
Number end, second end connect the pull-up node；
Described second control terminal for pulling down switch element connects the pull-down node, first end connects the 3rd power supply letter
Number end, second end connect the signal output part.
In a kind of exemplary embodiment of the disclosure, all switch elements are N-type transistor or are P-type crystal
Pipe.
According to one aspect of the disclosure, a kind of driving method of shift register cell is provided, it is above-mentioned for driving
Shift register cell；The driving method includes：
Input signal is responded by input module so that the first power supply signal is transmitted to pull-up node；
Reset signal is postponed by the delay cell in reseting module, and passes through the reset in the reseting module
Reset signal after unit operating lag is with by second source signal transmission to the pull-up node；
The voltage signal of the pull-up node is responded with by clock signal transmission to signal output part by output module；
The voltage signal of the pull-up node is responded by the first drop-down control module so that the 3rd power supply signal to be transmitted to
Pull-down node；
By second drop-down control module respond the 4th power supply signal with by the 4th power supply signal be transmitted to it is described under
Draw node；
The 3rd power supply signal is transmitted separately to by pulling down the voltage signal of the module response pull-down node
The pull-up node and the signal output part.
According to one aspect of the disclosure, a kind of gate driving circuit is provided, including above-mentioned shift register cell.
According to one aspect of the disclosure, a kind of display device is provided, which is characterized in that including above-mentioned raster data model electricity
Road.
Shift register cell and its driving method that disclosure illustrative embodiments are provided, gate driving circuit,
And display device, increase by a delay cell in reseting module to postpone to reset signal, can so delay upwards
The time of node PU and signal output part Output transmission pick-off signals is drawn, so as to pass through before pull-up node PU is resetted
Clock signal drags down the voltage of signal output part Output, and while shut-off exports signal pull-down node is made to be rapidly achieved work
Make voltage, in order to carry out noise reduction to signal output part rapidly by pulling down module.Based on this, pass through delayed reset signal
Improve the corresponding shift register cell grid caused by due to the wave distortion of pull-up node and pull-down node of touch-control scan line
The wave distortion of drive signal for example declined the problem of slow, and this method for the charging capacitor of remaining all row charging when
Between without influence, so as to the output waveform for quickly reducing gate drive signal to obtain stable.
It should be appreciated that above general description and following detailed description are only exemplary and explanatory, not
The disclosure can be limited.
Description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and for explaining the principle of the disclosure together with specification.It should be evident that the accompanying drawings in the following description is only the disclosure
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 schematically shows the circuit structure diagram of conventional shift register cell；
Fig. 2 schematically shows the waveform change schematic diagram of pull-up node and pull-down node in conventional shift register cell；
Fig. 3 schematically shows the distorted waveform figure of gate drive signal in conventional shift register cell；
Fig. 4 schematically shows the electrical block diagram of shift register cell in disclosure exemplary embodiment；
Fig. 5 schematically shows the effect improved comparison diagram of gate drive signal in disclosure exemplary embodiment；
Fig. 6 schematically shows the distribution signal of shift register cell in TDDI products in disclosure exemplary embodiment
Figure；
Fig. 7 schematically shows the driving method flow chart of shift register cell in disclosure exemplary embodiment；
Fig. 8 schematically shows the drive signal sequence diagram of shift register cell in disclosure exemplary embodiment；
Fig. 9 schematically shows the level link composition of gate driving circuit in disclosure exemplary embodiment.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to example set forth herein；On the contrary, these embodiments are provided so that the disclosure will more comprehensively and
Completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, structure or characteristic
It can in any suitable manner be incorporated in one or more embodiments.In the following description, many details are provided
Embodiment of the disclosure is fully understood so as to provide.It will be appreciated, however, by one skilled in the art that the disclosure can be put into practice
Technical solution and omit one or more in the specific detail or may be employed other methods, constituent element, device,
Step etc..In other cases, known solution is not shown in detail or describes to avoid all aspects of this disclosure is made to become mould
Paste.
In addition, attached drawing is only the schematic illustrations of the disclosure, it is not necessarily drawn to scale.The thickness of each layer in attached drawing
Do not reflect actual proportions with shape, be merely for convenience and purposes of illustration content of this disclosure.Identical reference numeral represents identical in figure
Or similar part, thus repetition thereof will be omitted.
Fig. 1 shows the circuit structure diagram of conventional shift register cell 10.It is understood with reference to figure 1, the shift register list
Member 10 can mainly include：The input module 101 being made of input transistors T1, in response to input signal Input and to
Node PU is drawn to charge；The output module 102 being made of output transistor T2 and charging capacitor C, for responding pull-up node
The voltage signal of PU and clock signal clk is exported by signal output part Output；The reset being made of reset transistor T3
Module 103, for pulling up node PU and signal output part Output output pick-off signals in response to reset signal Reset；Control
Molding block 104, for controlling the voltage of pull-down node PD according to pull-up node PU and a supply voltage VGH；Pull down module
105, pull-up node PU and signal output part Output put making an uproar for the voltage signal in response to pull-down node PD.
Based on this, such as 120Hz TDDI (Touch and Display Driver Intergation, touch-control with
Gate drivers integrate) in the application of product, touching signals line can be increased in the particular row of gate driving circuit, this is resulted in
The shift register cell that the touch-control stage has fixed several rows needs to keep current state, until touch-control terminates to recover normal
Work.But it is during this period, shown referring to figs. 2 and 3, due to the charging capacitor in retainer member such as shift register cell 10
C can generate electric leakage so that pull-up node PU openings are not enough, therefore will cause the corresponding grid of this journey clock signal clk
The wave distortion of drive signal；Meanwhile the voltage of pull-down node PD is not raised to high level VGH also this moment, i.e., entire displacement is posted
Storage unit 10 can not also carry out putting action of making an uproar, but output transistor T2 has been switched off, and so will result in signal this moment
Output terminal Output is floating state, so as to cause the more serious distortion of waveform of gate drive signal, is such as embodied in decline
Slowly.
Specifically, since when carrying out touch, the shift register cell 10 corresponding to touch-control scan line is in
Dead state, charging capacitor C, which is generated, at this time leaks electricity so that output transistor T2 is from fully opening, this is resulted on output signal
It rises slowly, it is slow to the reset of upper level shift register cell 10 so as to cause, therefore upper level shift register cell 10
Put the mechanism of making an uproar slowly less than, ultimately result in its export signal delay turn off and there is the gate drive signal in Fig. 3
Wave distortion.
One of solution method of problem above can directly reduce work period of all row clock signal CLK for example to push away
The rising time of slow clock signal clk realizes delaying for resetting time with this, and first that signal is defeated by clock signal clk
The gate drive signal of outlet Output moves low potential to.But this method can reduce the charging time of all row charging capacitor C, from
And it is more slow that output transistor T2 is caused to open, this can generate certain negative effect to the unlatching of gate drive signal.
Based on this, this example embodiment provides a kind of shift register cell 40, the grid applied to TDDI products
Driving circuit；Specifically, which can sweep as the touch-control in the gate driving circuit of TDDI products
Retouch the corresponding shift register cell of row.
As shown in figure 4, the shift register cell 40 can include：
Input module 401, connection input signal end, the first power supply signal end and pull-up node PU, inputs for responding
Signal Input by the first power supply signal VDD to be transmitted to pull-up node PU, so as to charge to pull-up node PU；
Reseting module 402, connection reset signal end, second source signal end, the 3rd power supply signal end and pull-up node
PU, the reseting module 402 can include reset unit and delay cell, wherein delay cell can be connected to reset signal end with
To postpone to reset signal Reset between 3rd power supply signal end, the reset that reset unit can be used for after operating lag is believed
Number Reset so as to be resetted to pull-up node PU, and is being resetted so that second source signal VSS is transmitted to pull-up node PU
The timing period clock signal clk of signal is low level, therefore directly signal output part Output can be resetted；
Output module 403, connection pull-up node PU, clock signal terminal and signal output part Output, for response
The voltage signal of node PU is drawn so that clock signal clk is transmitted to signal output part Output, so as to export to corresponding grid line
Using as gate drive signal；
First drop-down control module 404, connection pull-up node PU, the 3rd power supply signal end and pull-down node PD are used for
The voltage signal of pull-up node PU is responded so that the 3rd power supply signal VGL is transmitted to pull-down node PD；
Second drop-down control module 405, connects the 4th power supply signal end and pull-down node PD, for responding the 4th power supply letter
Number GCH by the 4th power supply signal GCH to be transmitted to pull-down node PD；
Pull down module 406, connection pull-down node PD, the 3rd power supply signal end, pull-up node PU and signal output part
Output, for respond the voltage signal of pull-down node PD with by the 3rd power supply signal VGL be transmitted separately to pull-up node PU and
Signal output part Output.
The shift register cell 40 that disclosure illustrative embodiments are provided increases in reseting module 402 and one prolongs
Slow unit can so be delayed to postpone to reset signal Reset and pull up node PU and signal output part Output biographies
The time of defeated pick-off signal, so as to drag down signal output part Output by clock signal before pull-up node PU is resetted
Voltage, and shut-off export signal while pull-down node PD is made to be rapidly achieved operating voltage, in order to by pulling down module
406 carry out noise reduction to signal output part Output rapidly.Based on this, Fig. 5 is using the shift LD in this example embodiment
The waveform improvement figure of the obtained gate drive signal of device unit.It follows that it can be improved by delayed reset signal
The corresponding shift register cell of touch-control scan line raster data model caused by due to the wave distortion of pull-up node and pull-down node
The wave distortion of signal for example declined the problem of slow, and this method is equal for the charging time of the charging capacitor of remaining all row
Without influence, so as to the output waveform for quickly reducing gate drive signal to obtain stable.
It is emphasized that：The shift register cell 40 that this example embodiment is provided is corresponding with touch-control scan line
Shift register cell, as shown in fig. 6, also there are many common displacements not corresponding with touch-control scan line in TDDI products
Register cell 60, and the shift register list for removing delay cell for example may be employed in these common shift register cells 60
Member.
In this example embodiment, refering to what is shown in Fig. 4, input module 401 can include input switch element M1, the input
The control terminal connection input signal end of switch element M1, first end connect the first power supply signal end, second end connection pull-up node
PU, for responding input signal Input so that the first power supply signal VDD is transmitted to pull-up node PU, so as to pull-up node PU
It charges.
In this example embodiment, refering to what is shown in Fig. 4, reseting module 402 can include reset unit and delay cell；Prolong
Slow unit can include a delay electric capacity C1, and delay electric capacity C1 can be connected to reset signal end and low level signal end example
Between such as the 3rd power supply signal end, for postponing to reset signal Reset；Reset unit can include reset switch element
The control terminal connection reset signal end of M2, reset switch element M2, first end connection second source signal end, second end connection
Pull-up node PU, for the reset signal Reset after operating lag second source signal VSS is transmitted to pull-up node PU,
So as to be resetted to pull-up node PU, and clock signal clk is low level in reset signal Reset timing periods, therefore
Directly signal output part Output can be resetted.
In this example embodiment, refering to what is shown in Fig. 4, output module 403 can include output switch element M3 and charging
Capacitance C2；The control terminal connection pull-up node PU of output switch element M3, first end connection clock signal terminal, second end connection
Signal output part Output, for responding the voltage signal of pull-up node PU so that clock signal clk is transmitted to signal output part
Output, so as to export gate drive signal to corresponding grid line；It is defeated with signal that charging capacitor C2 is arranged on pull-up node PU
Between outlet Output.
In this example embodiment, switched refering to what is shown in Fig. 4, the first drop-down control module 404 can include the first control
The control switch elements of element M4 and second M5；The control terminal connection pull-up node PU of first control switch element M4, first end
Connect the 3rd power supply signal end, second end connection drop-down control node PD-CN, for respond the voltage signal of pull-up node PU with
3rd power supply signal VGL is transmitted to drop-down control node PD-CN；The control terminal connection pull-up of second control switch element M5
Node PU, first end connect the 3rd power supply signal end, second end connection pull-down node PD, for responding the voltage of pull-up node PU
Signal by the 3rd power supply signal VGL to be transmitted to pull-down node PD.
In this example embodiment, switched refering to what is shown in Fig. 4, the second drop-down control module 405 can include the 3rd control
The control switch elements of element M6 and the 4th M7；The control terminal of 3rd control switch element M6 connects the 4th power supply letter with first end
Number end, second end connection drop-down control node PD-CN, for respond the 4th power supply signal CGH with by the 4th power supply signal CGH pass
Transport to drop-down control node PD-CN；The control terminal connection drop-down control node PD-CN of 4th control switch element, first end
Connect the 4th power supply signal end, second end connection pull-down node PD, for respond the voltage signal of drop-down control node PD-CN with
4th power supply signal CGH is transmitted to pull-down node PD.
It should be noted that：It is all for controlling drop-down that first drop-down control module 404 and second, which pulls down control module 405,
The voltage of node PD, the present embodiment controls the ratio of switch element M7 by design the 3rd control switch element M6 and the 4th,
Voltage when i.e. controllable pull-down node PD is driven high.
In this example embodiment, refering to what is shown in Fig. 4, drop-down module 406 can include first pull down switch element M8 with
Second pulls down switch element M9；First control terminal for pulling down switch element M8 connects pull-down node PD, first end connection the 3rd
Power supply signal end, second end connection pull-up node PU, for responding the voltage signal of pull-down node PD with by the 3rd power supply signal
VGL is transmitted to pull-up node PU, so as to put making an uproar to pull-up node PU；Second control terminal for pulling down switch element M9 connects
Pull-down node PD, first end connect the 3rd power supply signal end, second end connection signal output part Output, for responding drop-down section
The voltage signal of point PD by the 3rd power supply signal VGL to be transmitted to signal output part Output, so as to signal output part
Output put making an uproar.
In this example embodiment, refering to what is shown in Fig. 4, the shift register cell 40 can also be opened including a general reset
Element M10 is closed, the control terminal of general reset switch element M10 connects the 5th power supply signal end, first end connection the 3rd power supply letter
Number end, second end connection signal output part Output, for after the completion of two field picture progressive scan by the 5th power supply signal GCL
It is supreme, with to each shift register cell (including the corresponding shift register cell 40 of touching signals line and common displacement
Register cell 60) signal output part Output integrally carry out general reset.
Based on above-mentioned shift register cell 40, all switch elements can use N using P-type transistor or
Transistor npn npn.The present embodiment will be helpful to simplify manufacturing process, reduces manufacture cost using unified transistor types.
This example embodiment additionally provides a kind of driving method of shift register cell, for driving above-mentioned displacement
Register cell.As shown in fig. 7, the driving method includes：
S1, input signal Input is responded by input module 401 so that the first power supply signal VDD is transmitted to pull-up node
PU；
S2, reset signal Reset is postponed by the delay cell in reseting module 402, and passes through reseting module
The reset signal Reset after reset unit operating lag in 402 by second source signal VSS to be transmitted to pull-up node PU；
S3, the voltage signal for responding pull-up node PU by output module 403 are defeated clock signal clk is transmitted to signal
Outlet Output；
S4, the voltage signal of pull-up node PU is responded by the first drop-down control module 404 with by the 3rd power supply signal VGL
It is transmitted to pull-down node PD；
S5, the 4th power supply signal CGH is responded by the second drop-down control module 405 so that the 4th power supply signal CGH to be transmitted
To pull-down node PD；
S6, the 3rd power supply signal VGL is transmitted respectively by pulling down the voltage signal of the response pull-down node of module 406 PD
To pull-up node PU and signal output part Output.
The driving method for the shift register cell 40 that disclosure illustrative embodiments are provided, passes through reseting module
Delay cell in 402 postpones reset signal Reset, can so delay and pull up node PU and signal output part
Output transmits the time of pick-off signal, so as to while shut-off exports signal pull-down node PD be made to be rapidly achieved work
Voltage, in order to carry out noise reduction to signal output part Output rapidly by pulling down module 406.Based on this, Fig. 5 is to use originally to show
The waveform improvement figure of the obtained gate drive signal of shift register cell in example embodiment.It is it follows that logical
The corresponding shift register cell of touch-control scan line can be improved because of the ripple of pull-up node and pull-down node by crossing delayed reset signal
Shape distortion and caused by gate drive signal declined the problem of slow, and this method filling for the charging capacitor of remaining all row
The electric time without influence, so as to the output waveform for quickly reducing gate drive signal to obtain stable.
Below by taking all switch elements are N-type transistor as an example, with reference to signal timing diagram shown in Fig. 8 to shift LD
The course of work of device unit 40 is described in detail.
In the first t1 stages, input signal Input be high level, the first power supply signal VDD be high level, clock signal
CLK is low level, and input switch element M1 is turned at this time, and the first power supply signal VDD is transmitted to pull-up node PU and to the electricity that charges
Hold C2 to charge, the first control switch element M4 and the second control switch element M5 conductings under the action of pull-up node PU,
So that pull-down node PD is this moment for low level, then the first element M8 and second that pulls down switch pulls down switch element M9 shut-offs.
In the 2nd t2 stages, input signal Input is low level, and clock signal clk is high level, at this time input switch member
Part M1 is turned off, and switch element M3 conductings are exported under the action of pull-up node PU, and since the boot strap of capacitance to pull up
The effect of node PU further raises, then exports that switch element M3 is sufficiently conductive, and clock signal clk is transmitted to signal output part
Output is to realize the output of gate drive signal.The first control switch element M4 and the second control switch element M5 still locate at this time
In conducting state, therefore the first element M8 and second that pulls down switch pulls down switch element M9 still in off state, so as to
Ensure the stability of signal output.
In the 3rd t3 stages, next stage output signal G (n+1) i.e. reset signal Reset is high level, due to delay electric capacity
The presence of C1 causes reset switch element M2 reset signal Reset before fully on that can first charge to delay electric capacity C1, and
After delay electric capacity C1 is fully charged just can fully on reset switch element M2, to pull up section by second source signal VSS
Point PU and signal output part Output transmission pick-off signals, so as to be put to pull-up node PU and signal output part Output
Electricity.
In the 4th t4 stages, the 4th power supply signal GCH is high level, due on last stage to pull-up node PU and letter
Number output terminal Output is discharged, the first control switch element M4 and the second control switch element M5 shut-offs, therefore will not
It discharges again pull-down node PD；At this time so that the 3rd control switch element M6 and the 4th under the action of the 4th power supply signal CGH
Control switch element M7 conducting is to draw high the current potential of pull-down node PD, then the first element M8 and second that pulls down switch pulls down switch member
Part M9 conductings make an uproar to pull-up node PU and putting for signal output part Output with realizing so that the coupling generated by clock signal clk
It closes noise to be eliminated, so as to fulfill low-voltage output, ensures the stability of signal output.
Understand that this example embodiment postpones reset signal Reset by delay electric capacity C1 based on the above process,
The corresponding scan line of fixed touching signals line is improved because being brought when the wave distortion of pull-up node PU and pull-down node PD with this
Gate drive signal declined the problem of slow, and for other all row charging capacitor C2 charging time again without influence,
So as to improve the problem of gate drive signal shut-off is slow.
It should be noted that：The detail of the driving method of the shift register cell is posted in corresponding displacement
It has carried out detailed in the structure of storage unit and has described, which is not described herein again.
This example embodiment additionally provides a kind of gate driving circuit, as shown in figure 9, including multiple cascade above-mentioned shiftings
Bit register unit 40.
Wherein, all it is upper level shift register cell 40 per the input signal Input of level-one shift register cell 40
Output signal, the reset signal Reset per level-one shift register cell 40 is next stage shift register cell 40
Export signal.
In this example embodiment, grid stage drive circuit can with COF (Chip on Film, chip-on-film) or
The packaged type of COG (Chip on Glass, glass top chip) is arranged in display panel, can also be with GOA (Gate on
Array, the driving of array substrate row) mode of circuit is integrated in display panel.Wherein, liquid crystal display panel is directed to, with GOA
The gate driving circuit that technology is formed can reduce process to improve production capacity, while can also reduce cost.
This example embodiment additionally provides a kind of display device, including above-mentioned gate driving circuit raster data models
Circuit is integrated with display driving function and touch-control driving function, therefore can effectively reduce noise, is shown so as to improve touch-control
The display quality of device.
Wherein, the display device can include mobile phone, tablet computer, television set, laptop, Digital Frame, lead
Navigate any products or component with display function such as instrument.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice invention disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principle of the disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as illustratively, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
It should be appreciated that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by appended claim.
Claims (11)
1. a kind of shift register cell, which is characterized in that including：
Input module, connection input signal end, the first power supply signal end and pull-up node, for responding input signal with general
First power supply signal is transmitted to the pull-up node；
Reseting module, connection reset signal end, second source signal end, the 3rd power supply signal end and the pull-up node, institute
Stating reseting module includes reset unit and delay cell, and the delay cell is connected to the reset signal end and the described 3rd electricity
To postpone to reset signal between source signal end, the reset unit is used for the reset signal after operating lag with by second
Power supply signal is transmitted to the pull-up node；
Output module connects the pull-up node, clock signal terminal and signal output part, for responding the pull-up node
Voltage signal with by clock signal transmission to the signal output part；
First drop-down control module, connects the pull-up node, the 3rd power supply signal end and pull-down node, for ringing
The voltage signal of the pull-up node is answered so that the 3rd power supply signal is transmitted to the pull-down node；
Second drop-down control module, connects the 4th power supply signal end and the pull-down node, for respond the 4th power supply signal with
4th power supply signal is transmitted to the pull-down node；
Module is pulled down, it is defeated to connect the pull-down node, the 3rd power supply signal end, the pull-up node and the signal
Outlet, for responding the voltage signal of the pull-down node so that the 3rd power supply signal is transmitted separately to the pull-up node
With the signal output part；
Wherein, the shift register cell is the corresponding shift register cell of touch-control scan line.
2. shift register cell according to claim 1, which is characterized in that the reset unit includes reset switch member
Part, the control terminal of the reset switch element connects the reset signal end, first end connects the second source signal end, the
Two ends connect the pull-up node；
The delay cell includes delay electric capacity, and the delay electric capacity is connected to the reset signal end and believes with the 3rd power supply
Number end between.
3. shift register cell according to claim 1, which is characterized in that the input module includes input switch member
Part, the control terminal of the input switch element connects the input signal end, first end connects the first power supply signal end, the
Two ends connect the pull-up node.
4. shift register cell according to claim 1, which is characterized in that the output module includes output switch member
Part and charging capacitor；
The control terminal of the output switch element connects the pull-up node, first end connects the clock signal terminal, second end
Connect the signal output part；
The charging capacitor is connected between the pull-up node and the signal output part.
5. shift register cell according to claim 1, which is characterized in that the first drop-down control module includes the
One control switch element and the second control switch element；
The control terminal of the first control switch element connects the pull-up node, first end connects the 3rd power supply signal
End, second end connection drop-down control node；
The control terminal of the second control switch element connects the pull-up node, first end connects the 3rd power supply signal
End, second end connect the pull-down node.
6. shift register cell according to claim 5, which is characterized in that the second drop-down control module includes the
Three control switch elements and the 4th control switch element；
Described in the control terminal of the 3rd control switch element connects the 4th power supply signal end with first end, second end connects
Pull down control node；
The control terminal connection drop-down control node, the first end of the control switch element connect the 4th power supply signal
End, second end connect the pull-down node.
7. shift register cell according to claim 1, which is characterized in that the drop-down module is pulled open under including first
Element and second is closed to pull down switch element；
Described first control terminal for pulling down switch element connects the pull-down node, first end connects the 3rd power supply signal
End, second end connect the pull-up node；
Described second control terminal for pulling down switch element connects the pull-down node, first end connects the 3rd power supply signal
End, second end connect the signal output part.
8. according to claim 1-7 any one of them shift register cells, which is characterized in that all switch elements are N
Transistor npn npn is P-type transistor.
9. a kind of driving method of shift register cell, for driving claim 1-8 any one of them shift registers
Unit；It is characterized in that, the driving method includes：
Input signal is responded by input module so that the first power supply signal is transmitted to pull-up node；
Reset signal is postponed by the delay cell in reseting module, and passes through the reset unit in the reseting module
Reset signal after operating lag is with by second source signal transmission to the pull-up node；
The voltage signal of the pull-up node is responded with by clock signal transmission to signal output part by output module；
The voltage signal of the pull-up node is responded by the first drop-down control module so that the 3rd power supply signal is transmitted to drop-down
Node；
The 4th power supply signal is responded by the second drop-down control module to save so that the 4th power supply signal is transmitted to the drop-down
Point；
It is described the 3rd power supply signal to be transmitted separately to by pulling down the voltage signal of the module response pull-down node
Pull-up node and the signal output part.
10. a kind of gate driving circuit, which is characterized in that including claim 1-8 any one of them shift register cells.
11. a kind of display device, which is characterized in that including the gate driving circuit described in claim 9.
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