CN107342049A - The driving method of display panel and display panel - Google Patents
The driving method of display panel and display panel Download PDFInfo
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- CN107342049A CN107342049A CN201710765034.3A CN201710765034A CN107342049A CN 107342049 A CN107342049 A CN 107342049A CN 201710765034 A CN201710765034 A CN 201710765034A CN 107342049 A CN107342049 A CN 107342049A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The embodiment of the invention discloses a kind of display panel and the driving method of display panel.Wherein, display panel includes：The multiple image element circuits being arranged in array, image element circuit include：Light-emitting component, for being lighted in response to driving current；Drive module, for providing driving current to light-emitting component；Module is kept, for keeping the control terminal of drive module in the voltage of glow phase；At least one the first transistor, electrically connected with the control terminal of drive module, for writing a signal to the control terminal of drive module；At least one control module, each control module electrically connect with the grid of a first transistor, for the leakage current in glow phase, reduction the first transistor shut-off.Technical scheme provided in an embodiment of the present invention, the leakage current of the first transistor on glow phase leakage path can be reduced, reduce the flicker problem caused by electric leakage, and the characteristic drift of the first transistor can be reduced, improve the stability of image element circuit.
Description
Technical field
The present embodiments relate to display technology field, more particularly to the driving side of a kind of display panel and display panel
Method.
Background technology
Existing Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display compares liquid crystal
Show device, OLED has the advantages that low low energy consumption, production cost, self-luminous, wide viewing angle and fast response time, at present, in mobile phone, the palm
The display fields such as upper computer (Personal Digital Assistant, PDA), digital camera are widely used.It is organic
The image element circuit that each pixel of active display includes Organic Light Emitting Diode and drives organic light-emitting diode to show.
Image element circuit generally comprises a driving transistor, several switching transistors and storage capacitance, such as 2T1C pictures
Plain circuit includes a driving transistor, a switching transistor and an electric capacity.In luminescence process, driving transistor produces
Driving current drives organic light-emitting diode, and electric capacity is used for the grid voltage of stabilized driving transistor, makes driving crystal
Pipe produces stable driving current.In existing pixel-driving circuit, have switching transistor and produce leakage current, these switch crystal
Pipe and electric capacity form leakage path, cause the current potential on electric capacity to change, and then the grid and source voltage of driving transistor
Difference changes, drive current variations caused by driving transistor, causes the luminosity of Organic Light Emitting Diode to change, causes
Flicker.
The content of the invention
The present invention provides a kind of driving method of display panel and display panel, to realize the crystal reduced in image element circuit
Pipe glow phase electric leakage, and then reduce display flicker, improve display effect.
On the one hand, the embodiments of the invention provide a kind of display panel, the display panel are multiple including being arranged in array
Image element circuit, the image element circuit include：
Light-emitting component, for being lighted in response to driving current；
Drive module, for providing the driving current to the light-emitting component；
Module is kept, for keeping the control terminal of the drive module in the voltage of glow phase；
At least one the first transistor, electrically connected with the control terminal of the drive module, for writing a signal to the drive
The control terminal of dynamic model block；
At least one control module, each control module are electrically connected with the grid of a first transistor, are used for
In the glow phase, the leakage current during the first transistor shut-off is reduced.
On the other hand, the embodiment of the present invention additionally provides a kind of driving method of display panel, and the driving method includes：
Data write phase, the control module conducting, the first transistor conducting, the first crystalline substance that signal passes through conducting
Body pipe writes the control terminal of the drive module；
Glow phase, the control module shut-off, the first transistor shut-off, the drive module produce driving electricity
Stream, drives the light-emitting component to light.
Technical scheme provided in an embodiment of the present invention, control module electrically connect with the grid of the first transistor, in luminous rank
Section, control module shut-off, the grid of the first transistor and other signals are isolated, are equivalent to the grid for making the first transistor
In high-impedance state, the leakage current of the first transistor can be effectively reduced, effectively suppresses flicker, improves display effect.But also can
To reduce the characteristic drift of the first transistor, the stability of image element circuit is improved.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of image element circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of driver' s timing figure provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of display panel provided in an embodiment of the present invention.
Fig. 4 is the circuit diagram of another image element circuit provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of another image element circuit provided in an embodiment of the present invention
Fig. 6 is the circuit diagram of another image element circuit provided in an embodiment of the present invention.
Fig. 7 is the circuit diagram of another image element circuit provided in an embodiment of the present invention.
Fig. 8 is the circuit diagram of another image element circuit provided in an embodiment of the present invention.
Fig. 9 is another driver' s timing figure provided in an embodiment of the present invention；
Figure 10 is the circuit diagram of another image element circuit provided in an embodiment of the present invention.
Figure 11 is a kind of schematic flow sheet of the driving method of display panel provided in an embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
The embodiments of the invention provide a kind of display panel, the display panel includes the multiple pixels electricity being arranged in array
Road.Exemplarily, referring to Fig. 1, Fig. 1 is a kind of circuit diagram of image element circuit provided in an embodiment of the present invention, the image element circuit bag
Include：
Light-emitting component 11, for being lighted in response to driving current；
Drive module 12, for providing driving current to light-emitting component 11；
Module 13 is kept, for keeping the control terminal of drive module 12 in the voltage of glow phase；
At least one the first transistor 14, is electrically connected with the control terminal of drive module 12, for writing a signal to driving mould
The control terminal of block；
At least one control module 15, each control module 15 electrically connect with the grid of a first transistor 14, for
Glow phase, reduce leakage current when the first transistor 14 turns off.
In embodiments of the present invention, image element circuit may include one or more the first transistor 14, the first transistor 14
Can be by the transistor of the control terminal of data-signal write driver module 12 or for by again as switching transistor
The transistor of the control terminal of position signal write driver module 12 or the transistor for playing other effects.The first transistor
14 be usually the control terminal for electrically connecting drive module 13, namely electrically connects and keep the control terminal of module 13 and drive module 12 to be electrically connected
The one end connect.In data write phase, the control signal K that control module 15 inputs according to its control terminal is turned on, control module 15
The scanning signal VG of first end input writes the grid of the first transistor 14, the first transistor 14 by the control module 15 of conducting
Conducting, the control terminal and holding module of the data-signal Vdata write drivers module 12 of the first pole input of the first transistor 14
First end, namely first node N1.In glow phase, the first transistor 14 turns off, and the first transistor 14 can produce electric leakage, the
One transistor 14 and holding module 13 form leakage path, produce leakage current, can cause to keep the current potential of the first end of module 13,
That is the current potential of the control terminal of drive module 12 changes, and driving current caused by drive module 12 typically with drive module 12
The potential voltage of control terminal is related, the electric leakage of the first transistor 14 will influence drive module 12 caused by drive current variations, make
The brightness of light-emitting component 11 changes, and may produce flicker.And in the embodiment of the present invention, control module 15 and first crystal
The grid electrical connection of pipe 14, in glow phase, control module 15 turns off, by the grid of the first transistor and other signals carry out every
From, it is equivalent to make the grid of the first transistor to be in high-impedance state, can effectively reduces the leakage current of the first transistor 14, effective suppression
System flicker, improves display effect.But also the characteristic drift of the first transistor 14 can be reduced, improve the stabilization of image element circuit
Property.
Fig. 2 is a kind of driver' s timing figure provided in an embodiment of the present invention, and referring to Fig. 2, control module is turned at the t1 moment, swept
The grid that signal VG writes the first transistor 14 by the control module 15 of conducting is retouched, the first transistor turns at the t2 moment,
The t3 moment turns off；At the t4 moment, signal control module 15 turns off.When i.e. the first transistor 14 turns on or before conducting, its electricity
The control module 15 of connection turns on；When the first transistor 14 turns off or after shut-off, its control module 15 electrically connected turns off.
That is, the ON time section of the first transistor is located within the ON time section of control module 15.Control module 15 turns off
When, the first transistor 14 is also switched off, and data-signal Vdata can write the control of control module by the first transistor 14 of conducting
End.
Display panel provided in an embodiment of the present invention, the display scan frequency of display panel are smaller than being equal to 60Hz, if
The scan frequency of display panel is less than 10Hz, and the time of the glow phase of the image element circuit of display panel is relatively long.It is such as right
When scan frequency 60Hz is shown, the duration of glow phase is about 16.67ms in a frame, when display scan frequency is from original
60Hz is reduced to 20Hz, and the duration of glow phase is changed into about 50ms from about 16.67ms in a frame.If the first transistor produces
Raw electric leakage, the electric leakage time of the first transistor is also longer, and display panel is easier the problem of display flicker occur.Control module exists
Glow phase turns off, and the grid of the first transistor is in high-impedance state, reduces the leakage current on the first transistor, suppresses display surface
The flicker of plate, improve display effect.
Fig. 3 is a kind of structural representation of display panel provided in an embodiment of the present invention.Referring to Fig. 3, the display panel bag
Include control signal wire, a plurality of scan line (S1, S2, S3 ...) extended in a first direction and a plurality of extend in a second direction
Data wire Vdata；Multi-strip scanning line and a plurality of data lines Vdata insulation, which intersect, limits multiple sub-pixels 201, each sub-pixel
201 include the image element circuit that an any embodiment of the present invention provides；Per a line image element circuit, corresponding electrical connection at least one is swept
Retouch line, each row image element circuit correspondingly electrically connects a data line Vdata, the control terminal of the control module in image element circuit and control
Signal wire electrical connection processed.
Optionally, display panel provided in an embodiment of the present invention also includes the first level signal line and second electrical level signal
Line.In image element circuit in display panel provided in an embodiment of the present invention, at least one control module includes the first control mould
Block；At least one the first transistor includes switching transistor；Fig. 4 is the electricity of another image element circuit provided in an embodiment of the present invention
Lu Tu, referring to Fig. 4, the scan line Sn electrical connections corresponding with image element circuit of the first end of the first control module 151, the second end are with opening
Close transistor M1 grid electrical connection, control terminal electrically connects with control signal wire VT1；Switching transistor M1 the first pole and pixel
Data wire data electrical connections, the second pole electrically connect with the control terminal of drive module 12 corresponding to circuit；The first of drive module 12
End electrically connects with the first level signal line PVDD, the second end electrically connects with the first pole of light-emitting component 11；Keep the of module 13
One end and the control terminal of drive module 12 are electrically connected；The end of module 13 second is kept to be electrically connected with the first end of drive module 12；It is luminous
Second pole of element 11 electrically connects with second electrical level signal wire PVEE.The course of work of image element circuit shown in Fig. 4 may include as
Next stage：Data write phase, the control signal on control signal wire VT1 write the control terminal of the first control module 151, and first
Control module 151 turns on, the write switch transistor M1 of the first control module 151 that the scanning signal on scan line Sn passes through conducting
Grid, switching transistor M1 conductings the control terminal of the data-signal write driver module on data wire data and keep module
First end, namely first node N1.Glow phase, switching transistor shut-off, the first control module shut-off, drive module according to
The voltage of control terminal produces driving current, driving current driving light-emitting component luminescence display, keeps module to keep drive module
The voltage of control terminal, so that drive module persistently produces driving current driving light-emitting component and lighted.First switch module turns off, can
So that the grid of switching transistor is in high-impedance state, the leakage current in switching transistor is reduced, to stablize first node N1 electricity
Position, flicker is reduced, improve display effect.
Fig. 5 is the circuit diagram of another image element circuit provided in an embodiment of the present invention, and referring to Fig. 5, drive module includes driving
Dynamic transistor M0, keeps module to include the first electric capacity Cst1, the first control module includes second transistor M2；Second transistor M2
The first pole electrically connected with scan line Sn, the second pole electrically connects with switching transistor M1 grid, grid and control signal wire VT1
Electrical connection；Switching transistor M1 the first pole electrically connects with data wire data, the second pole and driving transistor M0 grid are electrically connected
Connect；Driving transistor M0 the first pole electrically connects with the first level signal line PVDD, the first pole of the second pole and light-emitting component 11
Electrical connection；First electric capacity Cst1 the first pole electrically connects with driving transistor M0 grid, the second pole is with driving transistor M0's
First pole electrically connects；Second pole of light-emitting component 11 electrically connects with second electrical level signal wire PVEE.
Optionally, display panel provided in an embodiment of the present invention also includes the first level signal line, second electrical level signal wire
With a plurality of luminous signal line, a corresponding luminous signal line per a line image element circuit.Fig. 6 is provided in an embodiment of the present invention another
The circuit diagram of kind image element circuit, referring to Fig. 6, the image element circuit also includes Data write. module 16, the first light emitting control module 17
With the second light emitting control module 18；At least one control module includes the second control module 152；At least one the first transistor bag
Include compensation transistor M10 and reset transistor M11；The control terminal of Data write. module 16 scan line Sn corresponding with image element circuit
Electrical connection, first end electrically connects with data wire data, the second end electrically connects with the first end of drive module 12, namely is saved with second
Point N2 is electrically connected；The control terminal of second control module 152 electrically connects with control signal wire VT1, first end and scan line Sn are electrically connected
Connect, the second end electrically connects with compensating transistor M10 grid；Compensate transistor M10 the first pole and the second of drive module 12
End electrical connection, namely electrically connected with the 3rd node N3, compensation transistor M10 the second pole and the control terminal of drive module 12,
Electrically connected with first node N1；Reset transistor M11 the first pole electrically connects with three level signal line Vref3, the second pole
Electrically connected with the control terminal of drive module 12；The first end of first light emitting control module 17 is electrically connected with the first level signal line PVDD
Connect, the second end electrically connects with the first end of drive module 12, control terminal luminous signal line Emit1 corresponding with image element circuit is electrically connected
Connect；Keep the first end of module 13 to be electrically connected with the control terminal of drive module 12, keep the second end and the first level of module 13
Signal wire PVDD is electrically connected；The first end of second light emitting control module 18 electrically connects with the second end of drive module 12, the second end
Electrically connected with the first pole of light-emitting component 11, control terminal electrically connects with luminous signal line Emit1；Second pole of light-emitting component 11 with
Second electrical level signal wire PVEE is electrically connected.
Exemplarily, in a frame of display, first stage, also referred to as initial phase or reseting stage, luminous signal
Luminous signal on line Emit1 writes the control of the control terminal and the second light emitting control module 18 of the first light emitting control module 17
End, the first light emitting control module 17 and the second light emitting control module 18 turn off, the first scanning signal write-in on scan line Sn-1
Reset transistor M1 grid, reset transistor M1 are turned on, and the three level signal write-in on three level signal line Vref3 is driven
The control terminal of dynamic model block 12 and the first end for keeping module 13, to the voltage and holding module 14 of the control terminal of drive module 12
The voltage of first end is resetted.Second stage, also referred to as data write phase, reset transistor M1 shut-offs, control signal wire VT1
On control signal write the control terminal of the second control module 152, the second control module 152 turns on, second on scan line Sn
The grid for the second control module 152 write-in compensation transistor M10 that scanning signal passes through conducting, the M10 conductings of compensation transistor, sweeps
The control terminal of the second scanning signal write-in Data write. module 16 on line Sn is retouched, Data write. module 16 turns on, data wire
Data-signal on data passes sequentially through Data write. module 16, drive module 12 and compensation transistor M10 write driver modules
12 control terminal, namely first node N1, the voltage of the control terminal of drive module 12, namely first node N1 voltage gradually rise
Height, until drive module 12 turns off, first node N1 voltage and the voltage of data-signal and the threshold voltage of drive module close
Connection.Phase III, also referred to as glow phase, Data write. module 16 and the M10 shut-offs of compensation transistor, the second control module 152
Turn off, the luminous signal on luminous signal line Emit1 writes the control terminal and the second light emitting control of the first light emitting control module 17
The control terminal of module 18, the first light emitting control module 17 and the second light emitting control module 18 turn on, and drive module 12 produces driving
Electric current, caused driving current is unrelated with the threshold voltage of drive module 12, drives current through the second light emitting control module 18
Drive light-emitting component 11 luminous, to realize the display function of display panel.In glow phase, the second control module 152 turns off, can
Compensation transistor M10 grid is set to be in high-impedance state, the leakage path for reducing compensation transistor M10 and keeping module 13 to be formed
On leakage current, stabilize first node N1 current potential, suppress flicker, improve display effect.
Fig. 7 is the circuit diagram of another image element circuit provided in an embodiment of the present invention, referring to Fig. 7, in the electricity of pixel shown in Fig. 6
On the basis of road, in image element circuit provided in an embodiment of the present invention, at least one control module also includes the 3rd control module
153；
The first end of 3rd control module 153 electrically connects with control signal wire VT1, the second end is with reset transistor M11's
Grid electrical connection, control terminal scan line Sn corresponding with image element circuit lastrow scan line Sn-1 electrical connections.
It should be noted that each scan line can be with the scan drive circuit on display panel, also referred to as gate driving circuit
(GOA) output end electrical connection, GOA circuits are located at the non-display area of display panel, can be located at the viewing area of display panel
The side in domain or relative both sides.Scan line Sn-1 is scan line Sn previous bar scan line, can be from GOA circuits to scan line
Sn-1 charges, that is, provides the first scanning signal；Charged to scan line Sn, that is, the second scanning signal is provided；Scan line Sn-1 and sweep
Retouch line Sn arranged adjacents successively.GOA circuits are providing the first scanning signal to scan line Sn-1, after completing charging, and then
The second scanning signal is provided to scan line Sn.First scanning signal is the preceding signal of the second scanning signal, that is to say, that first
Scanning signal is identical with the amplitude of the second scanning signal, and phase is different.
In the above-mentioned image element circuit course of work, in the first stage, the control of control signal write-in the 3rd on control signal wire VT1
The control terminal of molding block 153, the 3rd control module 153 turn on, the first scanning signal on scan line Sn-1 pass through conducting
Three control modules 153 write-in reset transistor M11 grid, reset transistor M11 conductings；In second stage, reset transistor
M11 is turned off；In the phase III, the 3rd control module 153 is turned off, and reset transistor M11 grid can be made to be in high-impedance state, is reduced
Reset transistor M11 and the leakage current on the leakage path that module 13 formed is kept, further stabilize first node N1's
Current potential, suppress flicker, improve display effect.
It should be noted that in the other embodiment that the present invention is implemented, the 3rd control module 153 can be only set,
The second control module 152 is not provided with, compensates grid and the scan line Sn-1 electrical connections of transistor.
Fig. 8 is the circuit diagram of another image element circuit provided in an embodiment of the present invention, referring to Fig. 8, in above-described embodiment
On the basis of, Data write. module includes third transistor M3, and the second control module 152 includes the 4th transistor M4, the 3rd control
Module 153 includes the 5th transistor M5, and the first light emitting control module 17 includes the 6th transistor M6, the second light emitting control module 18
Including the 7th transistor M7；Drive module 12 includes driving transistor M0, keeps module 13 to include the second electric capacity Cst2；
Third transistor M3 the first pole electrically connects with data wire Sn, the second pole and driving transistor M0 the first pole are electrically connected
Connect, grid electrically connects with scan line Sn；
4th transistor M4 the first pole electrically connects with scan line Sn, the second pole is electrically connected with compensating transistor M10 grid
Connect, grid electrically connects with control signal wire VT1；
Compensation transistor M10 the first pole electrically connects with driving transistor M0 grid, compensation transistor M10 the second pole
Electrically connected with driving transistor M0 the second pole；
5th transistor M5 the first pole and corresponding scan line Sn previous article of scan line Sn-1 electrical connections, the second pole with
Reset transistor M11 grid electrical connection, grid electrically connect with control signal wire VT1；
Reset transistor M11 the first pole electrically connects with three level signal line Vref3, the second of reset transistor M11
Pole electrically connects with driving transistor M0 grids；
6th transistor M6 the first pole electrically connects with the first level signal line PVDD, the second pole is with driving transistor M0's
The electrical connection of first pole, grid electrically connect with corresponding luminous signal line Emit1；
7th transistor M7 the first pole electrically connects with driving transistor M0 the second pole, the second pole and light-emitting component 11
The electrical connection of first pole, grid electrically connect with corresponding luminous signal line Emit1；
Second electric capacity Cst2 the first pole and driving transistor M0 grid, namely electrically connected with first node N1, second
Electric capacity Cst2 the second pole and driving transistor M0 the first pole, namely electrically connected with section point N2.
Fig. 9 is a kind of driver' s timing figure provided in an embodiment of the present invention.Exemplarily illustrate this with reference to Fig. 8 and Fig. 9
The course of work for the image element circuit that inventive embodiments provide.Wherein, the first level signal on the first level signal line PVDD is
High level, the second electrical level signal on second electrical level signal wire PVEE is low level.4th transistor M4 and the 5th transistor M5
For N-type transistor, other transistors are P-type transistor.The course of work of the image element circuit includes such as the next stage：
In the t1 stages, the luminous signal on luminous signal line Emit1 is high level, the 6th transistor M6 and the 7th transistor M7
Shut-off.Control signal on control signal wire VT1 is high level, and the 4th transistor M4 and the 5th transistor M5 are turned on, scan line
The first scanning signal on Sn-1, reset transistor M11 grid, the first scanning letter are write by the 5th transistor M5 of conducting
Number it is low level, reset transistor M11 conductings, the three level signal write driver crystal on three level signal line Vref3
First pole of pipe M0 grid and the second electric capacity Cst2, the three level signal on this stage three level signal line Vref3 can
Think low level signal, answered with the gate electrode to driving transistor M0 and with the second electric capacity Cst2 voltage of the first pole
Position, ensures the conducting of next stage driving transistor M0, and data-signal is capable of write driver transistor M0 grid.On scan line Sn
The second scanning signal write-in third transistor M3 grid, and pass through the 4th transistor M4 write-in compensation transistors of conducting
M10 grid, because the second scanning signal is high level, third transistor M3 and the M10 shut-offs of compensation transistor.This stage is also referred to as just
Stage beginning or reseting stage.
T2 stages, the 6th transistor M6 and the 7th transistor M7 shut-offs, the 4th transistor M4 and the 5th transistor M5 conductings,
The first scanning signal on scan line Sn-1 is high level, and reset transistor M11 is turned off.The second scanning signal on scan line Sn
For low level, third transistor M3 and compensation transistor M10 are turned on, and it is brilliant that the data-signal on data wire data passes sequentially through the 3rd
The first of body pipe M3, driving transistor M0 and compensation transistor M10 write driver transistors M0 grid and the second electric capacity Cst2
Pole, driving transistor M0 grid voltage gradually rise, until driving transistor M0 grid voltage and source voltage difference are equal to
During driving transistor M0 threshold voltage, driving transistor M0 shut-offs, driving transistor M0 grid voltage keeps constant, driving
The voltage V of transistor M0 grid voltage, i.e. first node N11=Vdata+Vth, wherein VdataFor the data on data wire data
The magnitude of voltage of signal, VthFor driving transistor M0 threshold voltage.
Stage after t2, also referred to as glow phase, the control signal on control signal wire VT1 are low level, the 4th crystal
Pipe M4 and the 5th transistor M5 shut-offs, compensation transistor M10 and reset transistor M11 are also switched off.On luminous signal line Emit1
Luminous signal is low level, the 6th transistor M6 and the 7th transistor M7 conductings.Driving transistor M0 leakage current, i.e. driving are brilliant
Driving current driving light-emitting component 11 is luminous caused by body pipe M0, driving current IdMeet below equation：
Wherein, wherein, μ be driving transistor M0 carrier mobility, W, L be driving transistor M0 raceway grooves width and
Length, CoxFor the gate oxide capacitance amount of driving transistor M0 unit areas.VPVDDFor on the first level signal line PVDD
The magnitude of voltage of one level signal, namely section point N2 magnitude of voltage.It can be seen that driving current caused by driving transistor M0
IdWith driving transistor M0 threshold voltage VthIt is unrelated.It is abnormal to solve display caused by driving transistor M0 threshold voltage shifts
Problem, and turned off in this stage, the 4th transistor M4 and the 5th transistor M5, compensation transistor M10 grid can be made and answered
Bit transistor M11 grid is in high-impedance state, reduces compensation transistor M10 and keeps on the leakage path of the formation of module 13
Leakage current, and reduce reset transistor M11 and keep the leakage current on the leakage path of the formation of module 13, stabilize first
Node N1 current potential, suppress flicker, improve display effect.
Above-mentioned example is using the 4th transistor M4 and the 5th transistor M5 as N-type transistor, and other transistors are P-type crystal
Book is illustrated exemplified by pipe, in the other embodiment of the embodiment of the present invention, the 4th transistor M4 and the 5th transistor M5 can
For P-type transistor, other transistors are N-type transistor.
Figure 10 is the circuit diagram of another image element circuit provided in an embodiment of the present invention, referring to Figure 10.With the picture shown in Fig. 8
Unlike plain circuit, the 4th transistor M4 control terminal and the 5th transistor M5 control terminal and luminous signal line Emit1 electricity
Connection, that is to say, that luminous signal line Emit1 is multiplexed with control signal wire.Luminous signal line Emit1 can with display panel
Luminous signal drive circuit (EOA) output end electrical connection, EOA circuits are located at the non-display area of display panel, Ke Yiwei
In the side of the viewing area of display panel or relative both sides.Charged, that is, carried from EOA circuits to luminous signal line Emit1
For luminous signal.Control signal wire is multiplexed with using luminous signal line Emit1, is replaced equivalent to using luminous signal line Emit1
Control signal wire VT1, control signal wire VT1 can be saved and the circuit of control signal is provided to control signal wire VT1, together
When save display panel in wiring space, reduce cost.
The embodiment of the present invention additionally provides a kind of driving method of display panel, available for driving any embodiment of the present invention
The display panel work of offer.Figure 11 is a kind of flow signal of the driving method of display panel provided in an embodiment of the present invention
Figure, referring to Figure 11, the driving method includes：
S510, data write phase, control module conducting, the first transistor conducting, the first crystal that signal passes through conducting
The control terminal of pipe write driver module.
S520, glow phase, control module shut-off, the first transistor shut-off, drive module produce driving current, driving hair
Optical element lights.
Control module turns off, and due to being electrically connected with the grid of the first transistor for control module, control module can be made electric
The grid of the first transistor of connection is in high-impedance state, reduces the leakage current on the first transistor, stabilized driving module control terminal
Voltage, suppress flicker, improve display effect.
In display panel provided in an embodiment of the present invention, drive module includes driving transistor, because driving transistor exists
Meeting occurrence features drift in the course of work, such as the threshold voltage shift of driving transistor, can be to the threshold value electricity of driving transistor
Pressure compensates, and improves display effect, correspondingly, above-mentioned driving method also includes：
Valve value compensation stage, the threshold voltage of driving transistor are compensated, and the offset voltage associated with threshold voltage is write
Enter to keep module；
In glow phase, keep module that offset voltage is supplied into driving transistor, driving transistor produces driving current
Driving light-emitting component lights.
In the threshold voltage compensation stage, reseting stage, reseting stage, by reset signal write driver transistor may also include
Grid, driving transistor is resetted, to open driving transistor, so that in data write phase, data-signal to be write
The grid of driving transistor.Specifically, it may be referred to the description to the image element circuit course of work shown in Fig. 8.
The scan frequency of display panel provided in an embodiment of the present invention is smaller than being equal to 60Hz.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (14)
1. a kind of display panel, it is characterised in that including the multiple image element circuits being arranged in array, the image element circuit includes：
Light-emitting component, for being lighted in response to driving current；
Drive module, for providing the driving current to the light-emitting component；
Module is kept, for keeping the control terminal of the drive module in the voltage of glow phase；
At least one the first transistor, electrically connected with the control terminal of the drive module, for writing a signal to the driving mould
The control terminal of block；
At least one control module, each control module electrically connects with the grid of a first transistor, in institute
Glow phase is stated, reduces the leakage current during the first transistor shut-off.
2. display panel according to claim 1, it is characterised in that during the first transistor conducting or turn on it
Before, its control module electrically connected conducting；During the first transistor shut-off or after shut-off, it is electrically connected described
Control module turns off.
3. display panel according to claim 1, it is characterised in that the display scan frequency of the display panel be less than etc.
In 60Hz.
4. display panel according to claim 1, it is characterised in that during the control module shut-off, its institute electrically connected
The grid for stating the first transistor is high-impedance state.
5. display panel according to claim 1, it is characterised in that also including control signal wire, it is a plurality of in the first direction
The scan line of extension and a plurality of data wire extended in a second direction；The a plurality of scan line and a plurality of data wire insulation are handed over
Fork limits multiple sub-pixels, and each sub-pixel includes an image element circuit；Image element circuit is corresponding one described in per a line
The scan line, each corresponding data wire of the row image element circuit, the control terminal of the control module and the control
Signal wire electrical connection processed.
6. display panel according to claim 5, it is characterised in that also believe including the first level signal line and second electrical level
Number line, at least one control module include the first control module；At least one the first transistor includes switch crystal
Pipe；
The scan line electrical connection corresponding with the image element circuit of the first end of first control module, the second end with it is described
The grid electrical connection of switching transistor, control terminal electrically connect with the control signal wire；
The first pole corresponding with the image element circuit data wire electrical connection, the second pole and the drive of the switching transistor
The control terminal electrical connection of dynamic model block；
The first end of the drive module electrically connects with the first level signal line, the second end and the first of the light-emitting component
Pole electrically connects；
The control terminal of the first end and the drive module of the holding module is electrically connected；Second end and the first of the drive module
End electrical connection；
Second pole of the light-emitting component electrically connects with the second electrical level signal wire.
7. display panel according to claim 6, it is characterised in that the drive module includes driving transistor, described
Module is kept to include the first electric capacity, first control module includes second transistor；
First pole of the second transistor electrically connects with the scan line, the second pole and the grid of the switching transistor are electrically connected
Connect, grid electrically connects with the control signal wire；
First pole of the switching transistor electrically connects with the data wire, the second pole and the grid of the driving transistor are electrically connected
Connect；
First pole of the driving transistor electrically connects with the first level signal line, the of the second pole and the light-emitting component
One pole electrically connects；
First pole of first electric capacity electrically connects with the grid of the driving transistor, the second pole and the driving transistor
First pole electrically connects.
8. display panel according to claim 5, it is characterised in that also believe including the first level signal line, second electrical level
Number line and a plurality of luminous signal line, the corresponding luminous signal line of image element circuit described in per a line；The image element circuit is also
Including Data write. module, the first light emitting control module and the second light emitting control module；At least one control module includes
Second control module；At least one the first transistor includes compensation transistor and reset transistor；
The scan line electrical connection corresponding with the image element circuit of the control terminal of the Data write. module, first end with it is described
Data wire electrical connection, the second end electrically connect with the first end of the drive module；
The control terminal of second control module electrically connects with the control signal wire, first end is corresponding with the image element circuit
The scan line electrical connection, the second end electrically connect with the grid of the compensation transistor；
First pole of the compensation transistor electrically connects with the second end of the drive module, the second pole of the compensation transistor
Electrically connected with the control terminal of the drive module；
First pole of the reset transistor electrically connects with the three level signal line, the control of the second pole and the drive module
End electrical connection processed；
The first end of the first light emitting control module electrically connects with the first level signal line, the second end and the driving mould
The first end electrical connection of block, the control terminal luminous signal line electrical connection corresponding with the image element circuit；
The first end for keeping module electrically connects with the control terminal of the drive module, second end for keeping module and institute
State the electrical connection of the first level signal line；
The first end of the second light emitting control module electrically connects with the second end of the drive module, the second end lights with described
The first pole electrical connection of element, control terminal electrically connect with the luminous signal line；
Second pole of the light-emitting component electrically connects with the second electrical level signal wire.
9. display panel according to claim 8, it is characterised in that at least one control module also includes the 3rd control
Molding block；
The first end of 3rd control module electrically connects with the control signal wire, the grid of the second end and the reset transistor
Pole electrically connects, scan line electrical connection described in the lastrow of the control terminal scan line corresponding with the image element circuit.
10. display panel according to claim 9, it is characterised in that the Data write. module includes third transistor,
Second control module includes the 4th transistor, and the 3rd control module includes the 5th transistor, the described first luminous control
Molding block includes the 6th transistor, the second light emitting control module includes the 7th transistor；The drive module includes driving
Transistor, the holding module include the second electric capacity；
First pole of the third transistor and corresponding data wire electrical connection, the of the second pole and the driving transistor
The electrical connection of one pole, grid electrically connect with the corresponding scan line；
First pole of the 4th transistor and the corresponding scan line electrical connection, the second pole and the grid of the compensation transistor
Pole electrical connection, grid electrically connect with the control signal wire；
First pole of the compensation transistor electrically connects with the grid of the driving transistor, the second pole of the compensation transistor
Electrically connected with the second pole of the driving transistor；
The previous article of scan line electrical connection of first pole of the 5th transistor and the corresponding scan line, the second pole with it is described
The grid electrical connection of reset transistor, grid electrically connect with the control signal wire；
First pole of the reset transistor electrically connects with three level signal line, the second pole of the reset transistor with it is described
Driving transistor grid electrically connects；
First pole of the 6th transistor electrically connects with the first level signal line, the second pole and the driving transistor
The electrical connection of first pole, grid electrically connect with the corresponding luminous signal line；
First pole of the 7th transistor electrically connects with the second pole of the driving transistor, the second pole and the light-emitting component
The electrical connection of the first pole, grid and corresponding luminous signal line electrical connection；
First pole of second electric capacity electrically connects with the grid of the driving transistor, the second pole of second electric capacity and institute
State the first pole electrical connection of driving transistor.
11. display panel according to claim 10, it is characterised in that the luminous signal line is multiplexed with the control letter
Number line；
The grid of the 4th transistor and the grid of the 5th transistor in the pixel-driving circuit with it is corresponding
Luminous signal line electrically connects.
A kind of 12. driving method for being used to drive the display panel described in claim 1, it is characterised in that including：
Data write phase, the control module conducting, the first transistor conducting, the first transistor that signal passes through conducting
Write the control terminal of the drive module；
Glow phase, the control module shut-off, the first transistor shut-off, the drive module produce driving current, driven
The light-emitting component is moved to light.
13. driving method according to claim 12, it is characterised in that the drive module includes driving transistor, institute
Stating driving method also includes：
Valve value compensation stage, the threshold voltage of the driving transistor are compensated, and the offset voltage associated with threshold voltage is write
Enter the holding module；
In the glow phase, keep module that the offset voltage is supplied into the driving transistor, the driving transistor
Producing driving current drives the light-emitting component to light.
14. the driving method according to claim 12 or 13, it is characterised in that the scan period of the display panel is less than
Equal to 60Hz.
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