CN207115975U - A kind of image element circuit, display device - Google Patents
A kind of image element circuit, display device Download PDFInfo
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- CN207115975U CN207115975U CN201721135794.8U CN201721135794U CN207115975U CN 207115975 U CN207115975 U CN 207115975U CN 201721135794 U CN201721135794 U CN 201721135794U CN 207115975 U CN207115975 U CN 207115975U
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Abstract
The utility model provides a kind of image element circuit, display device, is related to display technology field, can solve the problems, such as the brightness irregularities between pixel and pixel on display panel.Image element circuit, including：Data write. module, under the control of the first signal end, the signal at secondary signal end to be inputted to compensating module and drive module；Compensating module, the signal that signal and light emitting control module under the control of the 3rd signal end, being exported according to Data write. module export carry out the compensation of threshold voltage to drive module；Light emitting control module, under the control of the 4th signal end, the signal at first voltage end to be inputted to drive module and compensating module；Drive module, the signal for light emitting control module to be exported are inputted to light emitting module；Light emitting module, lighted for the signal exported in drive module and under the driving at second voltage end.
Description
Technical field
It the utility model is related to display technology field, more particularly to a kind of image element circuit, display device.
Background technology
Organic electroluminescent LED (Organic Light Emitting Diode, OLED) display is to study at present
One of the focus in field, compared to liquid crystal display (Liquid Crystal Display, LCD), OLED has low energy consumption, life
The advantages that producing low cost, self-luminous, fast wide viewing angle and corresponding speed.Wherein, pixel circuit design is OLED display core skill
Art content, there is important Research Significance.
AMOLED is OLED using thin film transistor (TFT) (Thin Film Transistor, TFT) structure image element circuit
Corresponding electric current is provided.Use low-temperature polysilicon film transistor (LTPS TFT) or oxide thin film transistor (Oxide more
TFT).However, LTPS TFT or the Oxide TFT made in large-area glass substrate, are usually present threshold voltage shift
Problem, because display panel each several part TFT threshold drift amount is different, display brightness difference can be caused so that pixel and pixel
Between luminance non-uniformity.
Utility model content
Embodiment of the present utility model provides a kind of image element circuit, display device, can solve pixel and picture on display panel
The problem of brightness irregularities between element.
To reach above-mentioned purpose, embodiment of the present utility model adopts the following technical scheme that：
First aspect, there is provided a kind of image element circuit, including：Data write. module, compensating module, drive module, luminous control
Molding block and light emitting module；The Data write. module, the compensating module, the drive module, the first letter are connected respectively
Number end and secondary signal end, under the control of first signal end, by the signal at the secondary signal end input to
The compensating module and the drive module；The compensating module, it is also connected with the drive module, light emitting control module and
Three signal ends, under the control of the 3rd signal end, the signal that is exported according to the Data write. module and described
The signal of light emitting control module output carries out the compensation of threshold voltage to the drive module；The light emitting control module, also connects
The drive module, the 4th signal end and first voltage end are connect, under the control of the 4th signal end, by described
The signal of one voltage end is inputted to the drive module and the compensating module；The drive module, light emitting module is also connected with, used
Inputted in the signal for exporting the light emitting control module to the light emitting module；The light emitting module, is also connected with second voltage
End, is lighted for the signal exported in the drive module and under the driving at the second voltage end.
Preferably, the Data write. module includes the first transistor；The grid connection described the of the first transistor
One signal end, the first pole connect the secondary signal end, and the second pole connects the compensating module and the drive module.
Preferably, the compensating module includes second transistor and the first electric capacity；The first end connection of first electric capacity
The Data write. module, the second end connect the first pole of the second transistor；The grid connection institute of the second transistor
The 3rd signal end is stated, the second pole connects the drive module and the light emitting control module.
Preferably, the drive module includes third transistor and the second electric capacity；The first end connection of second electric capacity
The first end of first electric capacity and the Data write. module, the second end connect the second pole of the third transistor；It is described
The grid of third transistor connects the second end of first electric capacity, and the first pole connects the second pole and the institute of the second transistor
Light emitting control module is stated, the second pole is also connected with the light emitting module.
The light emitting module includes luminescent device；The anode of the luminescent device connects the drive module, negative electrode connection
The second voltage end；The luminescent device is OLED.
Preferably, the light emitting control module includes the 4th transistor；The grid connection described the of 4th transistor
Four signal ends, the first pole connect the first voltage end, and the second pole connects the drive module and the compensating module.
Preferably, the transistor that the image element circuit includes is N-type transistor.
Preferably, the light emitting module includes luminescent device；The anode of the luminescent device connects the drive module, cloudy
Pole connects the second voltage end.
It is further preferred that the luminescent device is OLED.
Second aspect, there is provided a kind of display device, including the image element circuit described in multiple first aspects.
Preferably, the 3rd signal end in multiple image element circuits connects same signal input part, multiple pixels
The 4th signal end in circuit connects same signal input part.
The third aspect, there is provided a kind of driving method of image element circuit, the driving method include：In the initialization rank of a frame
Section, Data write. module input the reset control signal that secondary signal end exports to compensation under the control of the first signal end
Module and drive module, the compensating module and the drive module are initialized；In the compensated stage of a frame, the number
According to writing module under the control of first signal end, the compensating control signal that the secondary signal end exports is inputted to institute
Compensating module is stated, the compensating module carries out the compensation of threshold voltage to the drive module under the control of the 3rd signal end；
In the data write phase of a frame, the Data write. module is under the control of first signal end, by the secondary signal
The data-signal of end output is inputted to the drive module and stored to the drive module；In the glow phase of a frame, light
Control module inputs the supply voltage that first voltage end exports to the drive module, hair under the control of the 4th signal end
Optical module lights under the driving of drive signal and the supply voltage of second voltage end output that the drive module exports.
Preferably, also include in the initial phase of a frame, methods described：The light emitting control module is in the 4th signal end
Control under, the compensating module under the control of the 3rd signal end, by the first voltage end output reset voltage through institute
State compensating module to input to the drive module, the drive module is initialized.
Preferably, the Data write. module includes the first transistor；The compensating module includes second transistor and the
One electric capacity；The drive module includes third transistor and the second electric capacity；In the initial phase of a frame, first signal end
Open signal is inputted, controls the first transistor to open, the reset control signal that the secondary signal end exports passes through described
The first transistor is exported to first electric capacity and second electric capacity, and first electric capacity and second electric capacity are carried out just
Beginningization.
Preferably, open signal is inputted, controls the first transistor in the compensated stage of a frame, first signal end
Open, the compensating control signal of the secondary signal end output is exported to the compensating module, institute by the first transistor
The 3rd signal end input open signal is stated, controls the second transistor to open, threshold voltage is carried out to the drive module
Compensation.
Preferably, in the data write phase of a frame, first signal end inputs open signal, and control described first is brilliant
Body pipe is opened, and the data-signal of the secondary signal end output is exported to second electric capacity and deposited by the first transistor
Store up to second electric capacity.
Preferably, the light emitting control module includes the 4th transistor；The light emitting module includes luminescent device；In a frame
Glow phase, the 4th signal end inputs open signal, controls the 4th transistor to open, and the first voltage end is defeated
The supply voltage gone out is inputted to the drive module by the 4th transistor, and the luminescent device is defeated in the drive module
Lighted under the driving of the drive signal gone out and the supply voltage of second voltage end output.
Preferably, the Data write. module includes the first transistor；The compensating module includes second transistor and the
One electric capacity；The drive module includes third transistor and the second electric capacity；The light emitting control module includes the 4th transistor；
The initial phase of one frame, first signal end input open signal, control the first transistor to open, second letter
Number end output reset control signal exported by the first transistor to first electric capacity and second electric capacity, to institute
State the first electric capacity and second electric capacity is initialized；4th signal end inputs open signal, and control the described 4th is brilliant
Body pipe is opened, and the reset voltage of the first voltage end output is exported to the third transistor by the 4th transistor
Grid, the third transistor is initialized.
The image element circuit of the utility model embodiment offer, display device, by increasing compensating module in image element circuit,
Threshold voltage caused by drive module is compensated, so as to avoid display panel each several part TFT because of threshold voltage shift
Amount is different, caused by display brightness difference, the uniformity of brightness between pixel and pixel can be improved.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation for image element circuit that the utility model embodiment provides；
Fig. 2 is a kind of concrete structure schematic diagram of the modules of image element circuit shown in Fig. 1；
The timing diagram one for each signal that Fig. 3 (a) is used when being for driving the image element circuit shown in Fig. 2；
The timing diagram two for each signal that Fig. 3 (b) is used when being for driving the image element circuit shown in Fig. 2；
Fig. 4-Fig. 7 corresponds to equivalent circuit diagram during different situations for the image element circuit shown in Fig. 2；
Fig. 8-Figure 10 is that the image element circuit that the utility model embodiment provides simulates design sketch；
Figure 11 is a kind of pixel circuit drive method schematic flow sheet that the utility model embodiment provides.
Reference
10- Data write. modules；20- compensating modules；30- drive modules；40- light emitting control modules；50- light emitting modules.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
The utility model embodiment provides a kind of image element circuit, as shown in figure 1, including：Data write. module 10, compensation mould
Block 20, drive module 30, light emitting control module 40 and light emitting module 50.
Specifically, Data write. module 10, connect respectively compensating module 20, drive module 30, the first signal end S1 and
Secondary signal end S2, under the first signal end S1 control, secondary signal end S2 signal to be inputted to compensating module 20
With drive module 30.
Compensating module 20, drive module 30, the signal end S3 of light emitting control module 40 and the 3rd are also connected with, for the 3rd
Under signal end S3 control, the signal of signal and light emitting control module 40 output exported according to Data write. module 10 is to driving
Dynamic model block 30 carries out the compensation of threshold voltage.
Light emitting control module 40, drive module 30, the 4th signal end S4 and first voltage end V1 are also connected with, for
Under four signal end S4 control, first voltage end V1 signal is inputted to drive module 30 and compensating module 20.
Drive module 30, light emitting module 50 is also connected with, the signal for light emitting control module 40 to be exported is inputted to luminous
Module 50.
Light emitting module 50, second voltage end V2 is also connected with, for the signal exported in drive module 30 and second voltage end
Lighted under V2 driving.
The image element circuit that the utility model embodiment provides, by increasing compensating module 20 in image element circuit, to driving
Threshold voltage caused by module 30 compensates, so as to avoid display panel each several part TFT because of threshold voltage shift amount not
Together, display brightness difference caused by, the uniformity of brightness between pixel and pixel can be improved.
Specifically, as shown in Fig. 2 Data write. module 10 includes the first transistor T1.
The first transistor T1 grid connects the first signal end S1, the first pole connection secondary signal end S2, the connection of the second pole
Compensating module 20 and drive module 30.
Further specifically, the first transistor T1 the second pole connects the first electric capacity C1 first end and the second electric capacity C2
First end.
It should be noted that the Data write. module 10 can also include the multiple switch in parallel with the first transistor T1
Transistor.Above-mentioned is only to Data write. module 10 for example, other with the function identical of Data write. module 10
This is no longer going to repeat them for structure, but should all belong to the scope of protection of the utility model.
As shown in Fig. 2 compensating module 20 includes second transistor T2 and the first electric capacity C1.
First electric capacity C1 first end connection Data write. module 10, the second end connection second transistor T2 the first pole.
Second transistor T2 grid connects the 3rd signal end S3, the second pole connection drive module 30 and light emitting control module
40。
Further specifically, the first electric capacity C1 first end connection the first transistor T1 the second pole.
It should be noted that the compensating module 20 can also include the multiple switch crystal in parallel with second transistor T2
Pipe.Above-mentioned is only for example, other not another herein with the function identical structure of compensating module 20 to compensating module 20
One repeats, but should all belong to the scope of protection of the utility model.
As shown in Fig. 2 drive module 30 includes third transistor T3 and the second electric capacity C2.
Second electric capacity C2 first end connects the first electric capacity C1 first end and Data write. module 10, the second end connection the
Three transistor T3 the second pole.
Third transistor T3 grid connects the first electric capacity C1 the second end, and the first pole connects the second of second transistor T2
Pole and light emitting control module 40, the second pole are also connected with light emitting module 50.
Herein, third transistor T3 is driving transistor.
Further specifically, the second electric capacity C2 first end connection the first transistor T1 the second pole and the first electric capacity C1
First end.
It should be noted that the drive module 30 can also include the multiple switch crystal in parallel with third transistor T3
Pipe.Above-mentioned is only for example, other not another herein with the function identical structure of drive module 30 to drive module 30
One repeats, but should all belong to the scope of protection of the utility model.
As shown in Fig. 2 light emitting control module 40 includes the 4th transistor T4.
4th transistor T4 grid connects the 4th signal end S4, the first pole connection first voltage end V1, the connection of the second pole
Drive module 30 and compensating module 20.
Further specifically, the 4th transistor T4 the second pole connection third transistor T3 the first pole and second transistor
T2 the second pole.
It should be noted that the light emitting control module 40 can also include the multiple switch in parallel with the 4th transistor T4
Transistor.Above-mentioned is only to light emitting control module 40 for example, other with the function identical knot of light emitting control module 40
This is no longer going to repeat them for structure, but should all belong to the scope of protection of the utility model.
As shown in Fig. 2 light emitting module 50 includes luminescent device.
The anode connection drive module 30 of luminescent device, negative electrode connection second voltage end V2.
Wherein, luminescent device for example can be OLED.
Further specifically, the anode connection third transistor T3 of luminescent device the second pole.
Based on the above-mentioned description to each module physical circuit, above-mentioned pixel is driven below in conjunction with Fig. 2, Fig. 3 (a) and Fig. 3 (b)
The specific driving process of dynamic circuit is described in detail.
It should be noted that type of the first, the utility model embodiment to the transistor in modules and unit
Do not limit, i.e., above-mentioned the first transistor T1, second transistor T2, third transistor T3 and the 4th transistor T4 can be for
N-type transistor or P-type transistor.The transistor that the preferable image element circuit of the utility model embodiment includes is N-type crystal
Pipe.The utility model following examples are the explanations carried out so that above-mentioned transistor is N-type transistor as an example.
Wherein, the first of above-mentioned transistor extremely can be drain electrode, second extremely can be source electrode；Or first extremely can be
Source electrode, second extremely can be drain electrodes.The utility model embodiment is not restricted to this.
In addition, according to the difference of transistor conductivity mode, the transistor in above-mentioned image element circuit can be divided into enhanced
Transistor and depletion mode transistor.The utility model embodiment is not restricted to this.
Secondth, the utility model embodiment is low with first voltage end V1 input high levels, second voltage end V2 inputs
Level, or the explanation that will be carried out exemplified by the V2 groundings of second voltage end, also, the high and low voltage for only representing input here
Between relative size relation.
As shown in Fig. 3 (a) and Fig. 3 (b), each frame display process of the image element circuit can be divided into initial phase P1,
Compensated stage P2, data write phase P3, glow phase P4.Specifically：
In the initial phase P1 of a frame, as shown in Fig. 3 (a), the first signal end S1, the 3rd signal end S3 input height press off
Signal is opened, the 4th signal end S4 inputs low pressure pick-off signal, and based on this, the equivalent circuit diagram of the image element circuit shown in Fig. 2 is such as
Shown in Fig. 4, the first transistor T1, second transistor T2 and third transistor T3 are opened, the 4th transistor T4 cut-offs, (place
Represented in the transistor of cut-off state with beating "×").
Wherein, the first signal end S1 input high level open signals, control the first transistor T1 are opened, secondary signal end S2
The reset control signal of output exports first to the first electric capacity C1 first end and the second electric capacity C2 by the first transistor T1
End, that is, the n points in Fig. 4, are initialized to the first electric capacity C1 and the second electric capacity C2.
Or as shown in Fig. 3 (b), a frame initial phase P1, the first signal end S1, the 3rd signal end S3 and
4th signal end S4 inputs high-pressure opening signal, based on this, the equivalent circuit diagram of the image element circuit shown in Fig. 2 as shown in figure 5,
The first transistor T1, second transistor T2 and the 4th transistor T4 are opened, third transistor T3 cut-offs.
Wherein, the first signal end S1 input high level open signals, control the first transistor T1 are opened, secondary signal end S2
The reset control signal of output exports first to the first electric capacity C1 first end and the second electric capacity C2 by the first transistor T1
End, that is, the n points in Fig. 5, are initialized to the first electric capacity C1 and the second electric capacity C2；4th signal end S4 input high levels
Open signal, the 4th transistor T4 of control are opened, and the reset voltage of first voltage end V1 outputs is exported by the 4th transistor T4
To third transistor T3 grid, that is, the g points in Fig. 5, third transistor T3 is initialized.Now, to avoid sending out
Optical module 50 is luminous, and the reset voltage of first voltage end V1 outputs should control third transistor T3 to end.
In compensated stage P2, the first signal end S1, the 3rd signal end S3 the input high-pressure opening signal of a frame, the 4th signal
End S4 inputs low pressure pick-off signal, and based on this, the equivalent circuit diagram of the image element circuit shown in Fig. 2 is as shown in figure 4, first crystal
Pipe T1, second transistor T2 and third transistor T3 are opened, the 4th transistor T4 cut-offs.
Wherein, the first signal end S1 input high level open signals, control the first transistor T1 are opened, secondary signal end S2
The compensating control signal of output is exported to compensating module 20, the 3rd signal end S3 input open signals by the first transistor T1,
Control second transistor T2 to open, now second transistor T2 connects third transistor T3 grid and the first pole, by g points and
The voltage release of s points so that the voltage of s points is VSS+Voled0, and the voltage of g points is VSS+Voled0+Vth, to drive module
30 carry out the compensation of threshold voltage.Wherein, VSS is second voltage end V2 supply voltage, and Voled0 is that luminescent device does not light
When voltage, Vth be third transistor T3 threshold voltage.
Herein, the reset control signal of secondary signal end S2 outputs and compensating control signal can be with identical, if initializing
The signal end S4 of stage P1 the 4th do not input high-pressure opening signal, and so, initial phase P1 and compensated stage P2 can be closed
And completed for stage.
That is, at the end of compensated stage P2, the voltage of n points is Vref, and the voltage of s points is VSS+Voled0, the voltage of g points
For VSS+Voled0+Vth.
At data write phase P3, the first signal end S1 the input high-pressure opening signal of a frame, tertiary voltage end and the 4th
Voltage end inputs low pressure pick-off signal, and based on this, the equivalent circuit diagram of the image element circuit shown in Fig. 2 is as shown in fig. 6, first crystal
Pipe T1 and third transistor T3 are opened, second transistor T2 and the 4th transistor T4 cut-offs.
Wherein, the first signal end S1 inputs high-pressure opening signal, and control the first transistor T1 is opened, and secondary signal end S2 is defeated
The data-signal gone out is exported to the second electric capacity C2 and stored to the second electric capacity C2 by the first transistor T1.Now n points voltage is jumped
Vdata is changed to, variable Δ V=Vdata-Vref, g point voltage is jumped because C2 Capacitance Coupleds act on, is changed into VSS+Voled0+Vth+
Vdata-Vref。
That is, at the end of compensated stage P2, the voltage of n points is Vdata, and the voltage of s points is VSS+Voled0, the electricity of g points
Press as VSS+Voled0+Vth+Vdata-Vref.
In glow phase P4, the 4th signal end S4 the input high-pressure opening signal of a frame, tertiary voltage end and first voltage
V1 input low pressure pick-off signals are held, based on this, the equivalent circuit diagram of the image element circuit shown in Fig. 2 is as shown in fig. 7, third transistor
T3 and the 4th transistor T4 are opened, the first transistor T1 and second transistor T2 cut-offs.
Wherein, the 4th signal end S4 inputs high-pressure opening signal, and the 4th transistor T4 of control is opened, and first voltage end V1 is defeated
The supply voltage VDD gone out inputs the drive exported to drive module 30, luminescent device in drive module 30 by the 4th transistor T4
Lighted under the supply voltage VSS of dynamic signal and second voltage end V2 output driving.
That is, glow phase P4, g point voltage are VSS+Voled0+Vth+Vdata-Vref, and s points voltage is VSS+Voled.
Wherein, Voled is voltage when luminescent device is luminous.
Now, after third transistor T3 is opened, when third transistor T3 gate source voltage Vgs subtracts third transistor T3
Threshold voltage vt h obtained values when being less than or equal to third transistor T3 drain source voltage Vds, i.e. during Vgs-Vth≤Vds, the
Three transistor T3 are at saturation opening, and the driving current I for then flowing through third transistor T3 is：
Wherein, K=W/L × C × u, W/L be driving transistor Td breadth length ratio, C be raceway groove insulating barrier dielectric constant, u
For channel carrier mobility.
The above-mentioned parameter data-signal that only structure with third transistor T3, secondary signal end S2 are exported and secondary signal end
The compensating control signal of S2 outputs is relevant, unrelated with third transistor T3 threshold voltage vt h, so as to eliminate third transistor
Influences of the T3 threshold voltage vt h to luminescent device L luminosity, improve the homogeneity of luminescent device L brightness.In addition, by
Do not include VSS items in third transistor T3 driving current, therefore can solve pressure drop on VSS line and show inequality caused by influenceing
The problem of even, and comprising Voled0-Voled mono-, luminescent device L agings are brought to a certain extent display can be compensated not
The problem of uniform.
As Figure 8-Figure 10, emulation experiment is carried out to the image element circuit that the utility model embodiment provides, Fig. 8 is this reality
With the image element circuit of new offer in the simulated effect of compensated stage, Fig. 9 is image element circuit provided by the utility model in data
The simulated effect of write phase, Figure 10 are simulated effect of the image element circuit provided by the utility model in glow phase.From Figure 10
As can be seen that under the conditions of two kinds of Vth=1v and Vth=2v, glow current is identical.It is brilliant so as to compensate for the 3rd well
Body pipe T3 Vth inhomogeneities.
The utility model embodiment also provides a kind of display device, including multiple above-mentioned image element circuits.
Wherein, above-mentioned display device can be specifically OLED display, DPF, mobile phone, tablet personal computer, navigator etc.
Product or part with any display function.
The utility model embodiment provides a kind of display device, including any one image element circuit as described above.It is described
Display device can include multiple pixel unit arrays, and each pixel cell includes any one pixel electricity as described above
Road.The image element circuit that the display device that the utility model embodiment provides has with the utility model previous embodiment provides is identical
Beneficial effect, because image element circuit has been carried out describing in detail in the aforementioned embodiment, here is omitted.
In each stage of image element circuit, initial phase P1, compensated stage P2 and data write phase P3 it is full frame be not send out
Light, wherein initial phase P1 and compensated stage P2 are full frame while carried out, the 3rd signal end in multiple image element circuits
The same signal input part of S3 connections, the 4th same signal input part of signal end S4 connections in multiple image element circuits.Data write
Stage P3 is full frame to carry out line by line.After data are write, in all first signal end S1 of glow phase P4 and the 3rd signal
End S3 is in low level, and the 4th signal end S4 is high level, full frame to start to light.
Each pixel only needs a first signal end S1, and a secondary signal end S2, other is common signal, the circuit
Driving structure is simple, can greatly save driving IC (Integrated Circuit integrated circuits) cost.
The utility model embodiment also provides a kind of driving method of image element circuit, as shown in figure 11, the driving method bag
Include：
S10, the initial phase P1 in a frame, Data write. module 10 is under the first signal end S1 control, by second
The reset control signal of signal end S2 outputs is inputted to compensating module 20 and drive module 30, to compensating module 20 and drive module
30 are initialized.
Specifically, in initial phase P1, the first signal end S1 the input high-pressure opening signal of a frame, first crystal is controlled
Pipe T1 is opened, and the reset control signal of secondary signal end S2 outputs is exported to the first electric capacity C1 and second by the first transistor T1
Electric capacity C2, the first electric capacity C1 and the second electric capacity C2 are initialized.
Preferably, also include in the initial phase P1 of a frame, methods described：Light emitting control module 40 is in the 4th signal end
Under S4 control, compensating module 20 under the 3rd signal end S3 control, by first voltage end V1 output reset voltage through mend
Repay module 20 to input to drive module 30, drive module 30 is initialized.
Specifically, in initial phase P1, the first signal end S1 the input open signal of a frame, control the first transistor T1
Open, the reset control signal of secondary signal end S2 outputs is exported to the first electric capacity C1 and the second electric capacity by the first transistor T1
C2, the first electric capacity C1 and the second electric capacity C2 are initialized；4th signal end S4 inputs open signal, controls the 4th transistor
T4 is opened, and the reset voltage of first voltage end V1 outputs is exported to third transistor T3 grid by the 4th transistor T4, right
Third transistor T3 is initialized.
S20, the compensated stage P2 in a frame, Data write. module 10 is under the first signal end S1 control, by the second letter
Number end S2 output compensating control signal input it is right under the 3rd signal end S3 control to compensating module 20, compensating module 20
Drive module 30 carries out the compensation of threshold voltage.
Specifically, in compensated stage P2, the first signal end S1 the input open signal of a frame, control the first transistor T1 is opened
Open, the compensating control signal of secondary signal end S2 outputs is exported to compensating module 20, the 3rd signal end by the first transistor T1
S3 inputs open signal, and control second transistor T2 is opened, and the compensation of threshold voltage is carried out to drive module 30.
S30, the data write phase P3 in a frame, Data write. module 10 is under the first signal end S1 control, by
The data-signal of binary signal end S2 outputs is inputted to drive module 30 and stored to drive module 30.
Specifically, in data write phase P3, the first signal end S1 the input open signal of a frame, the first transistor is controlled
T1 is opened, and the data-signal of secondary signal end S2 outputs is exported to the second electric capacity C2 and stored to second by the first transistor T1
Electric capacity C2.
S40, the glow phase P4 in a frame, light emitting control module 40 is under the 4th signal end S4 control, by the first electricity
The supply voltage of pressure side V1 outputs inputs the drive signal that is exported to drive module 30, light emitting module 50 in drive module 30 and the
Lighted under the driving of the supply voltage of two voltage end V2 outputs.
Specifically, in glow phase P4, the 4th signal end S4 the input open signal of a frame, the 4th transistor T4 of control is opened
Open, the supply voltage of first voltage end V1 outputs is inputted to drive module 30, luminescent device by the 4th transistor T4 to be driven
Lighted under the driving of the supply voltage for drive signal and second voltage end the V2 output that module 30 exports.
The driving method for the image element circuit that the utility model embodiment provides, by increasing compensating module in image element circuit
20, threshold voltage caused by drive module 30 is compensated, so as to avoid display panel each several part TFT because of threshold voltage
Drift value is different, caused by display brightness difference, the uniformity of brightness between pixel and pixel can be improved.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in change in the technical scope that the utility model discloses
Or replace, it should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with the power
The protection domain that profit requires is defined.
Claims (10)
- A kind of 1. image element circuit, it is characterised in that including：Data write. module, compensating module, drive module, light emitting control mould Block and light emitting module；The Data write. module, the compensating module, the drive module, the first signal end and secondary signal are connected respectively End, under the control of first signal end, the signal at the secondary signal end to be inputted to the compensating module and institute State drive module；The compensating module, the drive module, light emitting control module and the 3rd signal end are also connected with, for the described 3rd The signal pair that the signal exported under the control of signal end according to the Data write. module and the light emitting control module export The drive module carries out the compensation of threshold voltage；The light emitting control module, the drive module, the 4th signal end and first voltage end are also connected with, for described Under the control of four signal ends, the signal at the first voltage end is inputted to the drive module and the compensating module；The drive module, is also connected with light emitting module, and the signal for the light emitting control module to be exported is inputted to the hair Optical module；The light emitting module, second voltage end is also connected with, for the signal exported in the drive module and the second voltage Lighted under the driving at end.
- 2. image element circuit according to claim 1, it is characterised in that the Data write. module includes the first transistor；The grid of the first transistor connects first signal end, and the first pole connects the secondary signal end, and the second pole connects Connect the compensating module and the drive module.
- 3. image element circuit according to claim 1, it is characterised in that the compensating module includes second transistor and first Electric capacity；The first end of first electric capacity connects the Data write. module, and the second end connects the first of the second transistor Pole；The grid of the second transistor connects the 3rd signal end, and the second pole connects the drive module and the luminous control Molding block.
- 4. image element circuit according to claim 3, it is characterised in that the drive module includes third transistor and second Electric capacity；The first end of second electric capacity connects the first end of first electric capacity and the Data write. module, the connection of the second end Second pole of the third transistor；The grid of the third transistor connects the second end of first electric capacity, and the first pole connects the of the second transistor Two poles and the light emitting control module, the second pole are also connected with the light emitting module.
- 5. image element circuit according to claim 1, it is characterised in that the light emitting control module includes the 4th transistor；The grid of 4th transistor connects the 4th signal end, and the first pole connects the first voltage end, and the second pole connects Connect the drive module and the compensating module.
- 6. image element circuit according to claim 1, it is characterised in that the transistor that the image element circuit includes is N-type Transistor.
- 7. image element circuit according to claim 1, it is characterised in that the light emitting module includes luminescent device；The anode of the luminescent device connects the drive module, and negative electrode connects the second voltage end.
- 8. image element circuit according to claim 7, it is characterised in that the luminescent device is OLED.
- 9. a kind of display device, it is characterised in that including the image element circuit described in multiple any one of claim 1-8.
- 10. display device according to claim 9, it is characterised in that the 3rd signal end in multiple image element circuits Connect same signal input part, the 4th signal end in multiple image element circuits connects same signal input part.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721135794.8U CN207115975U (en) | 2017-09-05 | 2017-09-05 | A kind of image element circuit, display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721135794.8U CN207115975U (en) | 2017-09-05 | 2017-09-05 | A kind of image element circuit, display device |
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| CN207115975U true CN207115975U (en) | 2018-03-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047701A1 (en) * | 2017-09-05 | 2019-03-14 | 京东方科技集团股份有限公司 | Pixel circuit, driving method therefor, and display device |
| CN109523951A (en) * | 2018-12-29 | 2019-03-26 | 云谷（固安）科技有限公司 | A kind of pixel circuit and display device |
-
2017
- 2017-09-05 CN CN201721135794.8U patent/CN207115975U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047701A1 (en) * | 2017-09-05 | 2019-03-14 | 京东方科技集团股份有限公司 | Pixel circuit, driving method therefor, and display device |
| US11217160B2 (en) | 2017-09-05 | 2022-01-04 | Boe Technology Group Co., Ltd. | Pixel circuit and method of driving the same, and display device |
| CN109523951A (en) * | 2018-12-29 | 2019-03-26 | 云谷（固安）科技有限公司 | A kind of pixel circuit and display device |
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