CN108665865A - Drive element of the grid and display device - Google Patents
Drive element of the grid and display device Download PDFInfo
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- CN108665865A CN108665865A CN201810455345.4A CN201810455345A CN108665865A CN 108665865 A CN108665865 A CN 108665865A CN 201810455345 A CN201810455345 A CN 201810455345A CN 108665865 A CN108665865 A CN 108665865A
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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
- G09G3/3696—Generation of voltages supplied to electrode drivers
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Crystallography & Structural Chemistry (AREA)
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- Computer Hardware Design (AREA)
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The embodiment of the present invention specifically discloses a kind of drive element of the grid and display device, wherein drive element of the grid includes pre-charge module, and precharging signal is provided to first node for transmitting signal according to prime；Low voltage signal is supplied to first node by pull-down module for transmitting signal according to rear class；First output module is connected in first node with pre-charge module and pull-down module, and the first output module, which is used to generate this grade according to the current potential and the first clock signal of first node, transmits signal；And second output module, it is connected with first node, for generating this grade of gate drive signal according to the current potential and power supply voltage signal of first node, larger AC power dissipation is generated so as to avoid the second output module, directly reduces the power consumption of drive element of the grid.
Description
Technical field
The present invention relates to display technology fields, relate more specifically to drive element of the grid and display device.
Background technology
Liquid crystal display device is changed the phenomenon that being changed under the action of electric field using the orientation of liquid crystal molecule
The display device of light source light transmittance.Due to having the advantages that display is high-quality, small and low in energy consumption, liquid crystal display device is
It is widely used in the mobile terminal of such as mobile phone and the large scale display panel of such as flat panel TV.Liquid on existing market
Crystal display is largely projection-type liquid crystal display comprising liquid crystal display panel and backlight module (backlight module).
The operation principle of liquid crystal display panel is liquid crystal molecule to be placed among the parallel glass substrate of two panels, and applied on two panels glass substrate
Add driving voltage to control the direction of rotation of liquid crystal molecule, generation picture is modulated to the luminous of backlight module.
The development of liquid crystal display in recent years presents high integration, the development trend of low cost, and integrative display drives
The dynamic research hotspot for being increasingly becoming flat panel display.So-called integrative display driving circuit refers to by gate driving circuit and source electrode
The peripheral circuits such as driving circuit are realized using switching tube (TFT) and are made in TFT substrate together with pixel switch pipe.And tradition
Circuit (IC) type of drive compare, using the method for integrated gate driving can not only reduce peripheral driver chip quantity and
Its press seal program reduces cost, and makes display periphery more slim so that display module is compacter, machinery and
Electrical reliability is enhanced.
Fig. 1 shows the circuit structure diagram of the drive element of the grid of the prior art.
As shown in Figure 1, the drive element of the grid 100 of the prior art includes switch transistor T 1-T7 and capacitance C1-C2.Wherein,
The control terminal of switch transistor T 1 receives prime gate drive signal Gn-2, and the first path terminal receives the first clock signal clk1, and second
Path terminal is connected with first node Q.The control terminal of switch transistor T 3 receives rear class gate drive signal Gn+2, the first path terminal and the
One node Q is connected, and alternate path end receives third clock signal clk3.Switch transistor T 2 constitutes the output of drive element of the grid 100
Module, control terminal are connected with first node Q, and the first path terminal receives second clock signal clk2, and alternate path end exports this grade
Gate drive signal Gn.The stable module of switch transistor T 4-T7 composition drive element of the grid 100, the control terminal of switch transistor T 4 receive
4th clock signal clk4, the first path terminal are connected with the alternate path end of switch transistor T 5, and alternate path end receives low-voltage letter
Number VGL, wherein the intermediate node and this grade of gate driving of the first path terminal of switch transistor T 4 and the alternate path end of switch transistor T 5
The output end of signal Gn is connected.The middle node of first path terminal of switch transistor T 5 and first node Q and the control terminal of switch transistor T 2
Point is connected, and control terminal is connected with the control terminal of switch transistor T 7.First path terminal of switch transistor T 6 and the control terminal of switch transistor T 5 and
The intermediate node of the control terminal of switch transistor T 7 is connected, and alternate path end receives low voltage signal VGL, control terminal and switch transistor T 7
First path terminal is connected.First path terminal of switch transistor T 7 is connected with the output end of this grade of gate drive signal Gn, alternate path
End receives low voltage signal VGL.In addition, the first end of capacitance C1 is connected with the control terminal of switch transistor T 2, second end and switching tube
The alternate path end of T2 connects.The first end of capacitance C2 is connected with second clock signal clk2 receiving terminals, second end and switching tube
The control terminal of T5 is connected with the intermediate node of the control terminal of switch transistor T 7.
The drive element of the grid 100 of the prior art by first switch pipe T1 to first node Q1 into line precharge, later
Switch transistor T 2 is connected by the boot strap of the first capacitance C1, the clk2 outputs of second clock signal are this grade of grid by switch transistor T 2
Drive signal Gn.Since this grade of gate drive signal Gn is for driving corresponding load, so switch transistor T 2 needs offer stronger
Driving capability, therefore the size of switch transistor T 2 can be significantly greater than other switching tubes in drive element of the grid, lead to switching tube
T2 has larger coupled capacitor.It can be seen that the power consumption of the drive element of the grid 100 of the prior art mostlys come from
The charge and discharge of two clock signal clk2 switch tubes T2, large-sized switch transistor T 2 can lead to the drive element of the grid of the prior art
100 power consumption is very big.
Therefore, it is necessary to provide improved technical solution to overcome the above technical problem existing in the prior art.
Invention content
In view of this, the purpose of the present invention is to provide a kind of drive element of the grid and display device, be conducive to reduce
Power consumption.
A kind of drive element of the grid provided according to the first aspect of the invention, including：Pre-charge module, for before
Grade transmits signal and precharging signal is provided to first node；Pull-down module believes low-voltage for transmitting signal according to rear class
Number it is supplied to the first node；First output module is connected in described with the pre-charge module and the pull-down module
One node, first output module are used to generate this grade according to the current potential and the first clock signal of the first node and transmit
Signal；And second output module, control terminal are connected with the first node, input terminal receives power supply voltage signal, is used for root
This grade of gate drive signal is generated according to the current potential and power supply voltage signal of first node.
Preferably, the precharging signal is second clock signal or power supply voltage signal.
Preferably, the drive element of the grid further includes stable module, receives third clock signal and low-voltage letter
Number, transmit signal and described grade for stablizing described grade according to the third clock signal and the low voltage signal
Transmit signal.
Preferably, the pre-charge module includes first switch pipe, and control terminal receives the prime and transmits signal, and first is logical
Terminal receives the precharging signal, and alternate path end is connected with the first node.
Preferably, first output module includes second switch pipe, and control terminal is connected with the first node, and first is logical
Terminal receives the second clock signal, and signal is transmitted in alternate path end for providing described grade；First capacitance, first end with
The control terminal of the second switch pipe is connected, and second end is connected with the alternate path end of the second switch pipe.
Preferably, second output module includes third switching tube, and control terminal is connected with the first node, and first is logical
Terminal receives the power supply voltage signal, and alternate path end is for providing described grade gate drive signal.
Preferably, the stable module includes the 4th to the 7th switching tube and the second capacitance, wherein the 4th switch
Pipe and the 5th switching tube are series between the first node and the low voltage signal receiving terminal, the 4th switching tube
Lead to the second of the second switch pipe with the intermediate node of the 5th switching tube and the control terminal of the 6th switching tube
Terminal is connected, and the control terminal of the 4th switching tube receives the third clock signal, the control terminal of the 5th switching tube with
The control terminal of 7th switching tube is connected, the alternate path end of the first path terminal and the second switch pipe of the 7th switching tube
It is connected, alternate path end receives the low voltage signal, the first path terminal and the 5th switching tube of the 6th switching tube
Control terminal be connected, alternate path end receives the low voltage signal, and second capacitance is series at the second switch pipe
Between first path terminal and the control terminal of the 5th switching tube.
Preferably, the pull-down module includes the 8th switching tube, and control terminal receives the rear class and transmits signal, the first access
End is connected with the control terminal of the third switching tube, and alternate path end receives the low voltage signal；9th switching tube, control terminal
It receives the rear class and transmits signal, the first path terminal is connected with the alternate path end of the third switching tube, alternate path termination
Receive the low voltage signal；And the tenth switching tube, control terminal and the first path terminal of the 6th switching tube are connected in second
Node, the first path terminal are connected with the intermediate node of the third switching tube and the 9th switching tube, and alternate path end receives
The low voltage signal.
Preferably, the pre-charge module further includes：11st switching tube, be series at the first switch pipe second are logical
Between terminal and the first node；12nd switching tube, control terminal receive first clock signal with the first path terminal, the
Two path terminals are connect with the control terminal of the 11st switching tube；13rd switching tube, control terminal receive the prime and transmit letter
Number, the first path terminal is connect with the intermediate node of the control terminal of the 11st switching tube and the alternate path end of the 12nd switching tube,
Alternate path end receives the low voltage signal；Third capacitance, first end and the alternate path end of the 11st switching tube connect
It connects, second end is connect with the alternate path end of the 5th switching tube.
A kind of display device is provided according to the second aspect of the invention, wherein including above-mentioned drive element of the grid.
The advantageous effect of drive element of the grid provided in an embodiment of the present invention and display device is：Drive element of the grid
In the second output module this grade of gate drive signal is directly generated according to supply voltage VDD, so as to avoid second output mould
Block generates larger AC power dissipation, directly reduces the power consumption of drive element of the grid；In addition, the second output module control signal by
First node is controlled, the third transistor size that connects with supply voltage VDD can be greatly reduced so that needed for reducing it
Layout areas are conducive to the design of narrow frame.Meanwhile drive element of the grid provided by the invention is generated for transmitting sequential simultaneously
The transmission signal of information and gate drive signal for driving load so that sequential between drive element of the grid at different levels and
The driving effect of load is more stablized.In preferred embodiment of the present invention, the pre-charge module of drive element of the grid is also straight
Connect the current potential that first node is controlled according to supply voltage VDD, to significantly reduce the AC power dissipation of pre-charge module, i.e., into
One step reduces the power consumption of drive element of the grid.In the drive element of the grid that preferred embodiment provides, by reducing preliminary filling
The electric time so that the effective time of gate drive signal is longer, improves the display quality of display device.Similarly, in use
Stating the power consumption of the display device of drive element of the grid can also be effectively reduced.
Description of the drawings
By referring to the drawings to the description of the embodiment of the present invention, above-mentioned and other purposes of the invention, feature and
Advantage will be apparent from.
Fig. 1 shows the circuit diagram of the drive element of the grid of the prior art.
Fig. 2 shows the structural schematic diagram of the drive element of the grid of the present invention.
Fig. 3 shows the circuit diagram of the drive element of the grid of first embodiment of the invention.
Fig. 4 shows the time diagram of the drive element of the grid work of first embodiment of the invention.
Fig. 5 show the prior art drive element of the grid and first embodiment of the invention drive element of the grid at 27 DEG C
Simulation schematic diagram.
Fig. 6 show the prior art drive element of the grid and first embodiment of the invention drive element of the grid at 60 DEG C
Simulation schematic diagram.
Fig. 7 shows the circuit diagram of the drive element of the grid of second embodiment of the invention.
Fig. 8 shows the time diagram of the drive element of the grid work of second embodiment of the invention.
Specific implementation mode
Hereinafter reference will be made to the drawings is more fully described the present invention.In various figures, identical element is using similar attached
Icon is remembered to indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.In addition, may not show in figure
Go out certain well known parts.
Many specific details of the present invention, such as the structure of component, material, size, processing work is described hereinafter
Skill and technology, to be more clearly understood that the present invention.But it just as the skilled person will understand, can not press
The present invention is realized according to these specific details.
Fig. 2 shows the structural schematic diagram of the drive element of the grid of the present invention.
As shown in Fig. 2, drive element of the grid 200 includes pre-charge module 210, the first output module 220, second output mould
Block 230, stable module 240 and pull-down module 250.Wherein, pre-charge module 210, the output of the first output module 220, second
Module 230 and stable module 240 are connected to first node Q1.Pre-charge module 210 receive prime transmit signal Zn-2 and
Second clock signal clk2, second clock signal clk2 is as precharging signal.When it is high level that prime, which transmits signal Zn-2,
Second clock signal clk2 is provided to first node by pre-charge module 210, to first node Q1 into line precharge, by first segment
Point Q1 preliminary fillings are to high potential.First output module 220 receives the first clock signal clk1, under the action of first node Q1
It is that this grade transmits signal Zn by the first clock signal clk1 outputs.Second output module 230 receives power supply voltage signal VDD, uses
In exporting this grade of gate drive signal Gn under the action of first node Q1.
Pull-down module 250 receives rear class and transmits signal Zn+2 and low voltage signal VGL, for transmitting signal Zn+2 in rear class
For the current potential of first node Q1 and this grade of gate drive signal Gn are dragged down when high level.Stable module 240 receives third clock
Signal clk3 and low voltage signal VGL, stable module 240 are used to maintain the potential level of first node Q1, this grade is made to transmit letter
Number Zn and this grade of gate drive signal Gn keep low level.
Power supply voltage signal VDD outputs are this grade of gate drive signal Gn by drive element of the grid 200 provided by the invention,
Coupled capacitor is small, is conducive to reduce power consumption.Wherein, in some other embodiments of the invention, what pre-charge module 210 received
Precharging signal is d. c. voltage signal, is conducive to further decrease power consumption.
Fig. 3 shows the circuit diagram of the drive element of the grid of first embodiment of the invention.
As shown in figure 3, pre-charge module 210 includes first switch pipe T1, the control terminal of first switch pipe T1 receives prime
Signal Zn-2 is transmitted, the first path terminal receives precharging signal, such as second clock signal clk2, alternate path end and first segment
Point Q1 is connected.Wherein, the structure of pre-charge module 210 is without being limited thereto, can be multiple switch pipe or other structures.
First output module 220 include second switch pipe T2 and the first capacitance C1, the control terminal of second switch pipe T2 with
First node Q1 is connected, and the first path terminal receives the first clock signal clk1, and signal is transmitted in alternate path end for providing this grade
Zn.First capacitance C1 is series between the control terminal and alternate path end of second switch pipe T2.
Second output module 230 includes third switch transistor T 3, and the control terminal of third switch transistor T 3 is connected with first node Q1,
First path terminal receives power supply voltage signal VDD, and alternate path end is for providing this grade of gate drive signal Gn.Wherein, second
The structure of output module 230 is without being limited thereto, can also be multiple switch pipe or other structures.
Stable module 240 includes the 4th to the 7th switch transistor T 4-T7.Wherein, the control terminal of the 4th switch transistor T 4 receives the
Three clock signal clk3, alternate path end receive low voltage signal VGL, the alternate path of the first path terminal and the 5th switch transistor T 5
End is connected, and the intermediate node and second of the first path terminal of the 4th switch transistor T 4 and the alternate path end of the 5th switch transistor T 5
The alternate path end of switch transistor T 2 is connected.First path terminal of the 5th switch transistor T 5 is connected with first node Q1, control terminal and the
The control terminal of seven switch transistor Ts 7 is connected.The control terminal of 6th switch transistor T 6 is opened with the alternate path end of the 5th switch transistor T 5 with second
The intermediate node for closing the alternate path end of pipe T2 is connected, and the first path terminal is connected with the control terminal of the 5th switch transistor T 5, and second is logical
Terminal receives low voltage signal VGL.The of first path terminal of the 7th switch transistor T 7 and the first capacitance C1 and second switch pipe T2
The node of two path terminals is connected, and alternate path end receives low voltage signal VGL.Stable module 240 further includes the second capacitance C2, the
The first end of two capacitance C2 is connected with the first path terminal of second switch pipe T2, the control terminal phase of second end and the 5th switch transistor T 5
Even.
Pull-down module 250 includes the 8th to the tenth switch transistor T 8-T10, the control of the 8th switch transistor T 8 and the 9th switch transistor T 9
End processed receives rear class and transmits signal Zn+2, and the first path terminal of the 8th switch transistor T 8 is connected with the control terminal of third switch transistor T 3,
Alternate path end receives low voltage signal VGL.The alternate path of the first path terminal and third switch transistor T 3 of 9th switch transistor T 9
End is connected, and alternate path end receives low voltage signal VGL.The control terminal of tenth switch transistor T 10 and the first of the 6th switch transistor T 6
Path terminal is connected in second node Q2, and the first path terminal is connected with the alternate path end of third switch transistor T 3, alternate path termination
Receive low voltage signal VGL.
It should be noted that the first to the tenth switch transistor T 1-T10 referred in the present embodiment is N-type film crystal
Pipe, and the first path terminal of each transistor can be interchanged (i.e. drain electrode and source electrode can be interchanged) with alternate path end, but this
Invention is practiced without limitation to this.
Fig. 4 shows the time diagram of the drive element of the grid work of first embodiment of the invention.
The operation principle of the drive element of the grid of first embodiment of the invention is carried out specifically referring to Fig. 3 and Fig. 4
It is bright.
As shown in figure 4, first to third clock signal clk1-clk3 duty ratio is identical, duty ratio is half.
And the course of work per level-one drive element of the grid includes pre-charging stage, pull-up stage, drop-down stage and stabilization sub stage,
Corresponding to the t1-t4 in Fig. 4.
Pre-charging stage, it is high level that prime, which transmits signal Zn-2, and the T1 conductings of first switch pipe, first switch pipe T1 will be pre-
Charging signals are provided to first node Q1, and the current potential of first node Q1 is made to be raised to high level.Wherein, precharging signal is, for example,
Second clock signal clk2 or d. c. voltage signal, such as supply voltage VDD.The current potential of first node Q1 be raised to high level it
Afterwards, the first clock signal clk1 outputs are that this grade transmits signal Zn by conducting second switch pipe T2, second switch pipe T2.
The pull-up stage further raises the current potential of first node Q1, third switch using the boot strap of the first capacitance C1
Pipe T3 conductings.Meanwhile first clock signal clk1 be connected the 6th switch transistor T 6, the 6th switch transistor T 6 is by the current potential of second node Q2
It drags down, the shutdown of the tenth switch transistor T 10, supply voltage VDD outputs are this grade of gate drive signal Gn by third switch transistor T 3 at this time.
In the drop-down stage, it is high level that rear class, which transmits signal Zn+2, and the 8th switch transistor T 8 and the 9th switch transistor T 9 are connected, the 8th
Switch transistor T 8 drags down the current potential of first node Q1, and the 9th switch transistor T 9 drags down the current potential of this grade of gate drive signal Gn, the
Two switch transistor Ts 2, third switch transistor T 3 and the shutdown of the 6th switch transistor T 6.
Stabilization sub stage, third clock signal clk3 are low level, the shutdown of the 4th switch transistor T 4.At this time because of the second capacitance C2
It charges to second node Q2, second node Q2 is maintained high level, the 5th switch transistor T 5, the 7th switch transistor T 7 and the tenth switch
Pipe T10 conductings, maintain first node Q1, this grade to transmit signal Zn and this grade of gate drive signal Gn low level respectively.
The drive element of the grid of the prior art and the gate driving list of first embodiment of the invention is shown respectively in Fig. 5 and Fig. 6
Simulation schematic diagram of the member at 27 DEG C and 60 DEG C.
Wherein, curve a indicates that the output noise of the drive element of the grid of the present invention, curve b indicate the grid of the prior art
The output noise of driving unit.As shown in Figure 5 and Figure 6, drive element of the grid of the invention is because using direct current as output source, because
This output noise is lower.
Fig. 7 shows the circuit diagram of the drive element of the grid of second embodiment of the invention.With the first embodiment of Fig. 3
Drive element of the grid is compared, the drive element of the grid of second embodiment the difference is that：Pre-charge module 210 further includes
11 to 13 switch transistor T 11-T13 and third capacitance C3.11st switch transistor T 11 is series at the second of first switch pipe T1
Between path terminal and first node Q1.The control terminal of 12nd switch transistor T 12 and the first path terminal receive the first clock signal
Clk1, alternate path end are connected with the control terminal of the 11st switch transistor T 11.The control terminal of 13rd switch transistor T 13 receives prime
Transmit signal Zn-2, the first path terminal of the first path terminal and the control terminal and the 12nd switch transistor T 12 of the 11st switch transistor T 11
Intermediate node be connected, alternate path end receives low voltage signal VGL.The first end of third capacitance C3 is with first switch pipe T1's
Alternate path end connects, and second end is connect with the alternate path end of the 5th switch transistor T 5.
In addition, first output module 220 of the present embodiment, the second output module 230, stable module 240 and lower drawing-die
The structure of block 250 is identical as the first embodiment of connection relation as shown in figure 3, and details are not described herein.
The first to the 13rd switch transistor T 1-T13 referred in the present embodiment is N-type TFT, and each crystalline substance
(i.e. drain electrode and source electrode can be interchanged) can be interchanged with alternate path end in first path terminal of body pipe, but the realization of the present invention is not
It is limited to this.
Fig. 8 shows the time diagram of the drive element of the grid work of second embodiment of the invention.
The operation principle of the drive element of the grid of second embodiment of the invention is carried out specifically referring to Fig. 7 and Fig. 8
It is bright.
As shown in figure 8, first to third clock signal clk1-clk3 duty ratio is identical, duty ratio is half.
And the course of work per level-one drive element of the grid includes pre-charging stage, pull-up stage, drop-down stage and stabilization sub stage,
Corresponding to the t5-t8 in Fig. 8.
Pre-charging stage, when it is high level that prime, which transmits signal Zn-2, first switch pipe T1 and the 13rd switch transistor T 13
Low voltage signal VGL is provided to the control terminal of the 11st switch transistor T 11, drags down the 11st and open by conducting, the 13rd switch transistor T 13
The voltage of pipe T11 control terminals, the shutdown of the 11st switch transistor T 11 are closed, therefore the current potential of first node Q1 does not change.
In the pull-up stage, it is low level that prime, which transmits signal Zn-2, at this time, and the first clock signal clk1 is high level, and first opens
Pipe T1 and the shutdown of the 13rd switch transistor T 13 are closed, the conducting of the 12nd switch transistor T 12, the 12nd switch transistor T 12 is by the first clock signal
Clk1 is provided to the control terminal of the 11st switch transistor T 11, draws high the voltage of 11 control terminal of the 11st switch transistor T, the 11st switch
Pipe T11 conductings, the current potential of first node Q1 is raised using the boot strap of third capacitance C3, second switch pipe T2 and third is connected
Switch transistor T 3.First clock signal clk1 outputs are that this grade transmits signal Zn by second switch pipe T2；Third switch transistor T 3 will be electric
Voltage VDD outputs in source are this grade of gate drive signal Gn.
In addition, the operation principle and first in the drop-down stage and stabilization sub stage drive element of the grid of second embodiment of the invention
Embodiment it is identical, details are not described herein.
The drive element of the grid that second embodiment of the invention provides improves gate driving letter by reducing precharge time
Number effective time, the display quality of display device finally can be improved.
According to another aspect of the present invention, a kind of display device of the drive element of the grid including above-described embodiment is provided.
In conclusion an embodiment of the present invention provides drive element of the grid and display devices.Wherein, drive element of the grid
In the second output module this grade of gate drive signal is directly generated according to supply voltage VDD, so as to avoid second output mould
Block generates larger AC power dissipation, directly reduces the power consumption of drive element of the grid；In addition, the second output module control signal by
First node is controlled, the third transistor size that connects with supply voltage VDD can be greatly reduced so that needed for reducing it
Layout areas are conducive to the design of narrow frame.Meanwhile drive element of the grid provided by the invention is generated for transmitting sequential simultaneously
The transmission signal of information and gate drive signal for driving load so that sequential between drive element of the grid at different levels and
The driving effect of load is more stablized.In preferred embodiment of the present invention, the pre-charge module of drive element of the grid is also straight
Connect the current potential that first node is controlled according to supply voltage VDD, to significantly reduce the AC power dissipation of pre-charge module, i.e., into
One step reduces the power consumption of drive element of the grid.In the drive element of the grid that preferred embodiment provides, by reducing preliminary filling
The electric time so that the effective time of gate drive signal is longer, improves the display quality of display device.Similarly, in use
Stating the power consumption of the display device of drive element of the grid can also be effectively reduced.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
As described above according to the embodiment of the present invention, there is no all details of detailed descriptionthe for these embodiments, also not
Limit the specific embodiment that the invention is only described.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is in order to preferably explain the principle of the present invention and practical application, belonging to making
Technical field technical staff can utilize modification of the invention and on the basis of the present invention to use well.
Claims (10)
1. a kind of drive element of the grid, which is characterized in that including：
Precharging signal is provided to first node by pre-charge module for transmitting signal according to prime；
Low voltage signal is supplied to the first node by pull-down module for transmitting signal according to rear class；
First output module is connected in the first node with the pre-charge module and the pull-down module, and described first is defeated
Go out module and transmits signal for generating this grade according to the current potential and the first clock signal of the first node；And
Second output module, control terminal are connected with the first node, and input terminal receives power supply voltage signal, for according to
The current potential of first node and the power supply voltage signal generate this grade of gate drive signal.
2. drive element of the grid according to claim 1, which is characterized in that the precharging signal is second clock signal
Or power supply voltage signal.
3. drive element of the grid according to claim 1, which is characterized in that further include：
Stable module receives third clock signal and low voltage signal, for according to the third clock signal and described
Low voltage signal stablizes described grade and transmits signal and described grade transmission signal.
4. drive element of the grid according to claim 3, which is characterized in that the pre-charge module includes：
First switch pipe, control terminal receive the prime and transmit signal, and the first path terminal receives the precharging signal, and second is logical
Terminal is connected with the first node.
5. drive element of the grid according to claim 4, which is characterized in that first output module includes：
Second switch pipe, control terminal are connected with the first node, and the first path terminal receives the second clock signal, and second is logical
Terminal transmits signal for providing described grade；
First capacitance, first end are connected with the control terminal of the second switch pipe, second end and the second of the second switch pipe
Path terminal is connected.
6. drive element of the grid according to claim 5, which is characterized in that second output module includes：
Third switching tube, control terminal are connected with the first node, and the first path terminal receives the power supply voltage signal, and second is logical
Terminal is for providing described grade gate drive signal.
7. drive element of the grid according to claim 6, which is characterized in that the stable module includes：
4th to the 7th switching tube and the second capacitance, wherein the 4th switching tube and the 5th switching tube are series at institute
It states between first node and the low voltage signal receiving terminal,
The intermediate node of 4th switching tube and the 5th switching tube and the control terminal of the 6th switching tube with it is described
The alternate path end of second switch pipe is connected,
The control terminal of 4th switching tube receives the third clock signal, and the control terminal of the 5th switching tube is opened with the 7th
The control terminal for closing pipe is connected,
First path terminal of the 7th switching tube is connected with the alternate path end of the second switch pipe, and alternate path end receives
The low voltage signal,
First path terminal of the 6th switching tube is connected with the control terminal of the 5th switching tube, described in the reception of alternate path end
Low voltage signal,
Second capacitance is series between the first path terminal of the second switch pipe and the control terminal of the 5th switching tube.
8. drive element of the grid according to claim 7, which is characterized in that the pull-down module includes：
8th switching tube, control terminal receive the rear class and transmit signal, the control terminal of the first path terminal and the third switching tube
It is connected, alternate path end receives the low voltage signal；
9th switching tube, control terminal receive the rear class and transmit signal, and the first path terminal is led to the second of the third switching tube
Terminal is connected, and alternate path end receives the low voltage signal；And
Tenth switching tube, the first path terminal of control terminal and the 6th switching tube are connected in second node, the first path terminal with
The third switching tube is connected with the intermediate node of the 9th switching tube, and alternate path end receives the low voltage signal.
9. drive element of the grid according to claim 4, which is characterized in that the pre-charge module further includes：
11st switching tube is series between the alternate path end and the first node of the first switch pipe；
12nd switching tube, control terminal receive first clock signal, alternate path end and the described tenth with the first path terminal
The control terminal of one switching tube connects；
13rd switching tube, control terminal receive the prime and transmit signal, the control terminal of the first path terminal and the 11st switching tube
It is connected with the intermediate node at the alternate path end of the 12nd switching tube, alternate path end receives the low voltage signal；
Third capacitance, first end are connect with the alternate path end of the 11st switching tube, and the of second end and the 5th switching tube
Two path terminals connect.
10. a kind of display device, which is characterized in that including claim 1-9 any one of them drive element of the grid.
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| CN201810455345.4A CN108665865B (en) | 2018-05-14 | 2018-05-14 | Gate drive unit and display device |
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| CN201810455345.4A CN108665865B (en) | 2018-05-14 | 2018-05-14 | Gate drive unit and display device |
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