CN104299570B - A kind of image element circuit and its driving method, array base palte and display panel - Google Patents
A kind of image element circuit and its driving method, array base palte and display panel Download PDFInfo
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- CN104299570B CN104299570B CN201410611987.0A CN201410611987A CN104299570B CN 104299570 B CN104299570 B CN 104299570B CN 201410611987 A CN201410611987 A CN 201410611987A CN 104299570 B CN104299570 B CN 104299570B
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Abstract
The invention discloses a kind of image element circuit and its driving method, array base palte and display panel, wherein, the image element circuit includes：The first transistor, transistor seconds, Organic Light Emitting Diode and voltage regulation unit.The present invention sets voltage regulation unit by between the grid in the second pole of the first transistor and as the transistor seconds of driving tube, the secondary signal that secondary signal input is received, even if due to the Capacitance Coupled by image element circuit periphery, there are the reasons such as decay and produces unstable in a frame shows in electric leakage, by after voltage regulation unit, the voltage signal that can be stablized, the voltage signal applies the grid of transistor seconds, stably transistor seconds can be controlled, the drain current that transistor seconds under opening can so stablized, so that the electric current for flowing through Organic Light Emitting Diode is more stablized, such that it is able to improve the display effect of display panel.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of image element circuit and its driving method, array base palte and aobvious
Show panel.
Background technology
In the image element circuit of display panel, active matrix organic light-emitting diode (Active MatrixOrganic
Light Emitting Diode, abbreviation AMOLED) can to light be thin film transistor (TFT) (Thin Film by as driving tube
Transistor, abbreviation TFT) driving current that produces in the saturated condition driven, therefore, the control to driving tube can shadow
Ring the display effect of Organic Light Emitting Diode.
Type of drive to driving tube can be divided into analog-driven and digital drive, and wherein analog-driven can be by electric current
Signal is realized, and digital drive can then be realized by voltage signal.By to driving tube apply only have high level and
Two kinds of voltage signals of voltage status of low level, can control driving tube to be turned on or off, further control organic light emission two
Pole tube light-emitting stops lighting, and then recycles the mode of field sequence to realize the control of gray scale.
Fig. 1 is the structural representation of the image element circuit of prior art.As shown in figure 1, the image element circuit of prior art includes
NMOS tube N1, PMOS P1, capacitor C0 and Organic Light Emitting Diode D0, wherein, the source electrode of NMOS tube N1 is defeated with data-signal
Enter and hold SOURCE to electrically connect, the grid of NMOS tube N1 is electrically connected with scanning signal input GATE, drain electrode and the electricity of NMOS tube N1
The grid electrical connection of the first end and PMOS P1 of container C0, second end of capacitor C0 and the source electrode of PMOS P1 connect the first electricity
The drain electrode of source PVDD, PMOS P1 meets second source PVEE, the electricity of the second source PVEE by Organic Light Emitting Diode D0
Voltage of the pressure less than the first power supply PVDD.Wherein PMOS P1 is in image element circuit as driving tube；Data-signal is input into
End SOURCE is used to receive the data-signal with digital drive function (only has two kinds of voltage status of high level and low level
Voltage signal)；Scanning signal input GATE is used to receive scanning signal；Capacitor C0 plays a part of storage capacitance,
After NMOS tube N1 is changed into closed mode from opening, so that PMOS P1 is continued on and is continued Organic Light Emitting Diode D0
It is luminous.
In the image element circuit shown in Fig. 1, on the one hand, because the data-signal for being applied to the grid of PMOS P1 can be subject to
The capacity coupled influence on the image element circuit periphery in display panel and a frame show in occur fluctuation, on the other hand, by
Situations such as electric leakage and data-signal occur decay in a frame shows, therefore, data-signal can be caused to PMOS P1
Control is unstable, further result in flow through Organic Light Emitting Diode D0 electric current it is unstable, so as to the aobvious of display panel can be influenceed
Show effect.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of image element circuit and its driving method, array base palte and display panel,
The data-signal of the grid for being applied to driving tube in the prior art with solution is unstable, causes to flow through the electricity of Organic Light Emitting Diode
The unstable technical problem of stream.
In a first aspect, the embodiment of the present invention provides a kind of image element circuit, including：It is the first transistor, transistor seconds, organic
Light emitting diode and voltage regulation unit；
The grid of the first transistor is electrically connected with the first signal input part of image element circuit, the first pole and image element circuit
Secondary signal input electrical connection, the second pole is electrically connected by the voltage regulation unit with the grid of the transistor seconds；
First pole of the transistor seconds and the first power electric connection, the sun of the second pole and the Organic Light Emitting Diode
Pole electrically connects；
The negative electrode of the Organic Light Emitting Diode is electrically connected with second source, wherein the voltage of the second source is less than institute
State the voltage of the first power supply；
Wherein, the voltage regulation unit is used for the current potential stabilization of the grid for remaining applied to the transistor seconds.
Second aspect, the embodiment of the present invention also provides a kind of array base palte, including the pixel electricity described in above-mentioned first aspect
Road.
The third aspect, the embodiment of the present invention also provides a kind of display panel, including the array base described in above-mentioned second aspect
Plate.
Fourth aspect, the embodiment of the present invention also provides a kind of driving method of image element circuit, and the driving method is by first
Image element circuit described in aspect is performed, including：
First signal control the first transistor is opened, the signal control second that secondary signal is exported after being processed through voltage regulation unit
Transistor is opened so that organic light-emitting diode；
First signal controls the first transistor to close, and the signal exported through the voltage regulation unit persistently controls institute
State transistor seconds unlatching so that the organic light-emitting diode；
First signal controls the first transistor to open, and the secondary signal is defeated after being processed through the voltage regulation unit
The signal for going out controls the transistor seconds to close so that the Organic Light Emitting Diode stops luminous.
Image element circuit provided in an embodiment of the present invention and its driving method, array base palte and display panel, by first
Voltage regulation unit, secondary signal input termination are set between the second pole of transistor and the grid as the transistor seconds of driving tube
The secondary signal of receipts, even if occurring decay due to the Capacitance Coupled by image element circuit periphery, electric leakage or in a frame shows
Produced etc. reason it is unstable, by after voltage regulation unit, the voltage signal that can be stablized, it is brilliant that the voltage signal applies second
The grid of body pipe, stably can be controlled to transistor seconds, can so make the second crystal under opening
It is in control the drain current of stabilization so that the electric current for flowing through Organic Light Emitting Diode is more stablized, such that it is able to improve display surface
The display effect of plate.
Brief description of the drawings
By the detailed description made to non-limiting example made with reference to the following drawings of reading, it is of the invention other
Feature, objects and advantages will become more apparent upon：
Fig. 1 is the structural representation of the image element circuit of prior art；
Fig. 2 is a kind of structural representation of image element circuit provided in an embodiment of the present invention；
Fig. 3 is the structural representation of another image element circuit provided in an embodiment of the present invention；
Fig. 4 is the structural representation of another image element circuit provided in an embodiment of the present invention；
Fig. 5 is the structural representation of another image element circuit provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of array base palte provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of display panel provided in an embodiment of the present invention；
Fig. 8 is a kind of schematic flow sheet of the driving method of image element circuit provided in an embodiment of the present invention；
Fig. 9 is the oscillogram of the first signal input part and the voltage signal of secondary signal input reception in Fig. 3.
Specific 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 rather than full content related to the present invention is illustrate only in description, accompanying drawing.
The embodiment of the present invention provides a kind of image element circuit.Fig. 2 is a kind of knot of image element circuit provided in an embodiment of the present invention
Structure schematic diagram.As shown in Fig. 2 the image element circuit includes：The first transistor M1, transistor seconds M2, Organic Light Emitting Diode
D1 and voltage regulation unit 10；The grid of the first transistor M1 is electrically connected with the first signal input part S1 of image element circuit, and first
Pole M11 is electrically connected with the secondary signal input S2 of image element circuit, and the second pole M12 passes through the voltage regulation unit 10 and described second
The grid electrical connection of transistor M2；First pole M21 of the transistor seconds is electrically connected with the first power supply PVDD, the second pole M22
Anode with the Organic Light Emitting Diode D1 is electrically connected；The negative electrode of the Organic Light Emitting Diode D1 and second source PVEE electricity
Connection, wherein voltage of the voltage of the second source PVEE less than the first power supply PVDD；Wherein, the voltage regulation unit 10
Current potential stabilization for remaining applied to the grid of the transistor seconds M2.
In embodiments of the present invention, the first signal input part S1 receives the first signal, and first signal is pulse
Signal, first signal is applied to the grid of the first transistor M1, and the first transistor M1 is controlled by the change of low and high level
Be turned on or off；The secondary signal input receives secondary signal, and the secondary signal is data-signal, wherein, institute
It is, with two kinds of voltage signals of voltage status of high level and low level, to be in the first transistor M1 and open shape to state data-signal
Under state, after the secondary signal is through the treatment of voltage regulation unit 10, the grid of transistor seconds M2 is applied to, then by low and high level
Change control being turned on or off for transistor seconds M2.In actual use, the first signal can be turntable driving electricity
The scanning signal that road produces, secondary signal can be the data-signal that data drive circuit is produced.
It should be noted that above-mentioned transistor seconds M2 is the driving tube in image element circuit, for driving organic light emission
Diode D1 is luminous or stops lighting, therefore, by the control being turned on or off to transistor seconds M2, you can realize
To the control that Organic Light Emitting Diode D1 is luminous or stopping is luminous.Additionally, for first pole of above-mentioned the first transistor M1
M11, can be set as source electrode or drain electrode, and accordingly, its second pole M12 can be set as drain electrode or source electrode；It is same,
The first pole M21 for above-mentioned transistor seconds M2, can be set as source electrode or drain electrode, and accordingly, its second level M22 can
To be set as drain electrode or source electrode.
Set by between the second pole M12 in the first transistor M1 and the grid as the transistor seconds M2 of driving tube
Voltage regulation unit 10, if as data-signal secondary signal due to the Capacitance Coupled by image element circuit periphery, electric leakage or
There are the reasons such as decay in a frame shows and produce wild effect, by the way that stabilization after the treatment of voltage regulation unit 10, can be become
Voltage signal, the voltage signal applies the grid of transistor seconds M2, stably transistor seconds M2 can be controlled.
Because transistor seconds M2 is operated in saturation region in the state of unlatching, the relation according to its drain current and gate source voltage can
Know, if its grid voltage stabilization (source voltage in fig. 2 is constant voltage), it becomes possible to make its drain electrode electricity stablized
Stream, and the drain current flows through its electric current when being organic light-emitting diode, therefore, keep the grid of transistor seconds M2
Voltage stabilization, can cause that the electric current for flowing through Organic Light Emitting Diode D1 is more stablized.
Fig. 3 is the structural representation of another image element circuit provided in an embodiment of the present invention.Referring to Fig. 3, as in Fig. 2
Preferred embodiment, voltage regulation unit 10 can include the first phase inverter TR1 and the first capacitor C1 to of image element circuit；Institute
The input and the first end of the first capacitor C1 for stating the first phase inverter TR1 are electrically connected, and brilliant with described first
The second pole M12 electrical connections of body pipe M1, output end and the grid of the transistor seconds M2 of the first phase inverter TR1 are electrically connected
Connect, second end of the first capacitor C1 electrically connects with the 3rd signal input part S3 of image element circuit.
Specifically, the first capacitor C1 plays a part of storage capacitance, is changed into closing from opening in the first transistor M1
After closed state, the voltage of the first end storage of the first capacitor C1 can continue on transistor seconds M2 and make organic light emission
Diode D1 continuous illuminations；By setting the first phase inverter TR1 in voltage regulation unit 10, because secondary signal is data-signal,
There are two kinds of voltage signals of voltage status of high level and low level, even if the secondary signal has unstable situation,
By after the treatment of the first phase inverter TR1, the voltage signal that can be stablized, for example, in figure 3, secondary signal is shakiness
Ground or float high level signal when, by after the first phase inverter TR1, the low level signal that can be stablized；Similarly,
After one transistor M1 becomes closed mode by opening, even if the voltage of the first end of the first capacitor C1 has unstable feelings
Condition occurs, by after the treatment of the first phase inverter TR1, the voltage signal that can be equally stablized, therefore, it is anti-phase through first
The voltage signal obtained after device TR1 treatment is applied to the grid of transistor seconds M2, and stably transistor seconds M2 can be entered
Row control, the drain current that the transistor seconds M2 under opening can so stablized, such that it is able to make stream
The electric current for crossing Organic Light Emitting Diode D1 is more stablized.
In figure 3, the 3rd signal input part S3 receives the 3rd signal, and the 3rd signal can be constant high level signal
Or constant low level signal, the level value of the constant high level signal can be 5V to 15V, the constant low electricity
The level value of ordinary mail number can arrive -5V for -15V.However, it is also possible to according to actual design or needs, believe constant high level
Number level value and the level value of constant low level signal selected.Except shown in Fig. 3 by the 3rd signal input
Be applied to 3rd signal outside second end of the first capacitor C1 by end S3, it is also possible to terminates first by the second of the first capacitor C1
Power supply PVDD or second source PVEE, i.e. the second end to the first capacitor C1 apply power supply signal, wherein the first power supply
The magnitude of voltage of PVDD can be 3V to 7V, and the magnitude of voltage of second source PVEE can generally take negative value, it is also possible to according to actually setting
Meter is needed, and the magnitude of voltage to corresponding power supply is selected.In addition it is also possible to apply other to second end of the first capacitor C1
Constant voltage signal, be not limited thereto.
Constant voltage signal is applied by the second end to the first capacitor C1, is in the first transistor M1 and is opened shape
Under state, after secondary signal is through the anti-phase treatment of the first phase inverter TR1, the grid of transistor seconds M2 is applied to, makes the second crystal
Pipe M2 is opened and is driven Organic Light Emitting Diode D1 to light, and at the same time, secondary signal can be to the first of the first capacitor C1
End is charged, and makes the voltage of first end reach secondary signal to recharge here the voltage in stage；In the first transistor M1 by opening
The state of opening is changed under closed mode, and the voltage of the first end of the first capacitor C1 can persistently make transistor seconds M2 open and drive
Organic Light Emitting Diode D1 lights.
Fig. 4 is the structural representation of another image element circuit provided in an embodiment of the present invention.Referring to Fig. 4, as in Fig. 2
Image element circuit another preferred embodiment, voltage regulation unit 10 can include latch, wherein, the latch includes anti-
To the second phase inverter TR2 and the 3rd phase inverter TR3 of electrical connection in parallel；The first end F1 of the latch and the first crystal
The second pole M12 electrical connections of pipe M1, the second end F2 of the latch is electrically connected with the grid of the transistor seconds M2.
Specifically, the latch being electrically connected to form by the second phase inverter TR2 and the 3rd phase inverter TR3 reverse parallel connections,
After two phase inverter TR2 output signals, the 3rd phase inverter TR3 is by the output signal by after anti-phase treatment, feeding back to second anti-phase
The input of device TR2 so that the level of the input of the second phase inverter TR2 and the voltage signal of output end remains opposite；
When the first transistor M2 is closed, due to the effect of the 3rd phase inverter TR3, the input of the second phase inverter TR2 persistently has voltage
Signal, therefore, the work that the first phase inverter TR1 and the first capacitor C1 in the role of latch in Fig. 4 and Fig. 3 rise
With identical.
Be under opening in the first transistor M1, secondary signal through the second phase inverter TR2, because secondary signal is number
It is believed that number, i.e., with two kinds of voltage signals of voltage status of high level and low level, even if the secondary signal has unstable feelings
Condition occurs, by after the treatment of the second phase inverter TR2, the voltage signal that can be stablized；Similarly, in the first transistor M1
After becoming closed mode by opening, even if the voltage of the input of the second phase inverter TR2 has unstable situation,
By after the treatment of the second phase inverter TR2, the voltage signal that can be equally stablized, therefore, through the second phase inverter TR2 treatment
The voltage signal for obtaining afterwards is applied to the grid of transistor seconds M2, and stably transistor seconds M2 can be controlled, this
Sample can make the drain current that the transistor seconds M2 under opening is stablized, such that it is able to make to flow through organic light emission
The electric current of diode D1 is more stablized.
After the first transistor M1 becomes closed mode by opening, in order that the first end F1 of the latch in Fig. 4
There can be more lasting voltage signal, a capacitor can be set in pixel single channel.Fig. 5 is that the embodiment of the present invention is provided
Another image element circuit structural representation.Referring to Fig. 5, on the basis of Fig. 4, voltage regulation unit can also include the second electric capacity
Device C2, the first end of the second capacitor C2 is electrically connected with the first end F1 of the latch, the second capacitor C2's
Second end electrically connects with the 3rd signal input part S3 of image element circuit.Operation principle on the second capacitor C2, refer to Fig. 3
In the first capacitor C1 operation principle associated description, therefore not to repeat here.
In Figure 5, the 3rd signal input part S3 receives the 3rd signal, and the 3rd signal can be constant high level signal
Or constant low level signal, the level value of the constant high level signal can be 5V to 15V, the constant low electricity
The level value of ordinary mail number can arrive -5V for -15V.However, it is also possible to according to actual design or needs, believe constant high level
Number level value and the level value of constant low level signal selected.Except shown in Fig. 5 by the 3rd signal input
Be applied to 3rd signal outside second end of the second capacitor C2 by end S3, it is also possible to terminates first by the second of the second capacitor C2
Power supply PVDD or second source PVEE, i.e. the second end to the second capacitor C2 apply power supply signal, wherein the first power supply
The magnitude of voltage of PVDD can be 3V to 7V, and the magnitude of voltage of second source PVEE can generally take negative value, it is also possible to according to actually setting
Meter is needed, and the magnitude of voltage to corresponding power supply is selected.In addition it is also possible to apply other to second end of the second capacitor C2
Constant voltage signal, be not limited thereto.
It should be noted that in the image element circuit shown in above-mentioned Fig. 2 to Fig. 5, the first transistor M1 is NMOS tube, second
Transistor M2 is PMOS, wherein, when the first signal is the voltage signal of high level, the first transistor M1 is opened, the first signal
During for low level voltage signal, the first transistor M1 is closed；The data-signal of gained is low electricity after being processed through voltage regulation unit 10
During flat voltage signal, transistor seconds M2 is opened, the data-signal of gained for high level voltage signal when, transistor seconds
M2 is closed.This is only the specific embodiment chosen to the type of the first transistor and transistor seconds, another
In individual specific embodiment, the first transistor and transistor seconds can be NMOS tube, and now, the first signal is high level
During voltage signal, the first transistor M1 is opened, conversely, then the first transistor M1 is closed, and the institute after the treatment of voltage regulation unit 10
When the data-signal for obtaining is the voltage signal of high level, transistor seconds M2 is opened, conversely, then transistor seconds M2 is closed；Or
Person's the first transistor and transistor seconds can be PMOS, now, when the first signal is low level voltage signal, first
Transistor M1 is opened, conversely, then the first transistor M1 is closed, and the data-signal of gained is low after the treatment of voltage regulation unit 10
During the voltage signal of level, transistor seconds M2 is opened, conversely, then transistor seconds M2 is closed；Or the first transistor can be with
It is PMOS, and transistor seconds can be NMOS tube, now, when the first signal is low level voltage signal, first crystal
Pipe M1 is opened, conversely, then the first transistor M1 is closed, and the data-signal of gained is high level after the treatment of voltage regulation unit 10
Voltage signal when, transistor seconds M2 open, conversely, then transistor seconds M2 close.In the actual design of image element circuit,
Type that can be as needed to the first transistor and transistor seconds is chosen, as long as correspondingly setting the first signal and
Binary signal, herein the type not to the first transistor and transistor seconds be defined.
The embodiment of the present invention also provides a kind of array base palte.Fig. 6 is a kind of array base palte provided in an embodiment of the present invention
Structural representation.Referring to Fig. 6, the array base palte includes：Scan drive circuit 21, data drive circuit 22, m bar scan lines
(S1, S2 ..., Sm), n data lines (D1, D2 ..., Dn) and multiple image element circuits 23；Wherein, the image element circuit 23
Structure using the image element circuit described in above-mentioned each embodiment, will not be repeated here.
Specifically, the scan drive circuit 21 shown in Fig. 6, sweeps for being provided to each bar scan line (S1, S2 ..., Sm)
Retouch signal；Data drive circuit 22, for providing data-signal to pieces of data line (D1, D2 ..., Dn)；23 points of image element circuit
It is not arranged in the pixel region that scan line and data wire are intersected to form, wherein, the first signal input of each image element circuit 23
End and the electrical connection of corresponding scan line, the first signal that first signal input part is received is scanning signal, each image element circuit
23 secondary signal input is electrically connected with corresponding data wire, and the secondary signal that the secondary signal input is received is believed for data
Number.
The embodiment of the present invention also provides a kind of display panel.Fig. 7 is a kind of display panel provided in an embodiment of the present invention
Structural representation.Referring to Fig. 7, the display panel includes：First substrate 31 and the second base being oppositely arranged with first substrate 31
Plate 32, wherein, the first substrate 31 can be color membrane substrates, packaged glass (Cover Glass) or cover-plate glass
(Cover Lens) etc., the second substrate 32 is the array base palte described in above-described embodiment.
It should be noted that above-mentioned display panel can have touch controllable function, it is also possible to without touch controllable function, in reality
During making, can be according to being selected the need for specific and designed.Wherein, touch controllable function can be electromagnetic touch function, electric capacity
Touch controllable function or electromagnetism capacitance touching control function etc..
Above-mentioned display panel is using being driven by data-signal driving tube and and then control the luminous of Organic Light Emitting Diode
Or stop luminous image element circuit, such display panel can be used to make display device below 3.5 cun of wrist-watch etc. or
Person's electronic equipment.
The embodiment of the present invention also provides a kind of driving method of image element circuit, and the driving method can be by above-mentioned each implementation
Image element circuit described in example is performed.Fig. 8 is that a kind of flow of the driving method of image element circuit provided in an embodiment of the present invention is shown
It is intended to.As shown in figure 8, the driving method of image element circuit includes：
S41, the first signal control the first transistor are opened, and the signal that secondary signal is exported after being processed through voltage regulation unit is controlled
Transistor seconds is opened so that organic light-emitting diode；
S42, first signal control the first transistor to close, and the signal exported through the voltage regulation unit is persistently controlled
Make the transistor seconds to open so that the organic light-emitting diode；
S43, first signal control the first transistor to open, and the secondary signal is processed through the voltage regulation unit
The signal for exporting afterwards controls the transistor seconds to close so that the Organic Light Emitting Diode stops luminous.
Because the driving method of the image element circuit can be performed as the image element circuit described in above-mentioned each embodiment, because
This, is in order to more fully understand the driving method, next, just by taking the image element circuit shown in Fig. 3 as an example, and combine Fig. 9 institutes
The oscillogram of the voltage signal that the first signal input part and secondary signal input are received in the image element circuit for showing, to the drive
Dynamic method is described further.Other each embodiments on image element circuit, refer to below with reference to the pixel electricity shown in Fig. 3
The associated description on road, will not be repeated here.Wherein, in fig .9, SS1 represents the first signal of the first signal input part reception,
SS2 represents the secondary signal of secondary signal input reception.
Referring to Fig. 3 and Fig. 9, in the T1 stages, the first signal SS1 control the first transistors M1 of high level is opened, high level
The first transistor M1s of the secondary signal SS2 through opening, be transferred to the first end and the first phase inverter TR1 of the first capacitor C1
Input, through the anti-phase treatment of the first phase inverter TR1 after, obtain low level voltage signal, voltage signal control second is brilliant
Body pipe M2 is opened, and the first power supply PVDD and Organic Light Emitting Diode D1 is turned on so that Organic Light Emitting Diode D1 lights, same with this
When, the secondary signal of high level charges to the first end of the first capacitor C1, and causes that its first end obtains secondary signal
Voltage.
In the T2 stages, the first signal SS1 becomes low level by the high level in T1 stages so that the first transistor M1 is closed,
Secondary signal SS2 becomes low level by the high level in T1 stages, but can not be transferred to the input of the first phase inverter TR1；
This stage, the first end of the first capacitor C1 provides voltage signal for the input of the first phase inverter TR1, and the voltage signal is height
Level, by after the anti-phase treatment of the first phase inverter TR1, obtaining low level voltage signal, voltage signal control second is brilliant
Body pipe M2 is opened, so that Organic Light Emitting Diode D1 can constantly light.
In the T3 stages, the first signal SS1 becomes high level by the low level in T2 stages, and control the first transistor M1 is opened,
Secondary signal SS2 remains in that low level during T2 stages, and is transferred to the of the first capacitor C1 by the first transistor M1
One end and the input of the first phase inverter TR1, through the anti-phase treatment of the first phase inverter TR1 after, obtain the voltage signal of high level,
Voltage signal control transistor seconds M2 is closed, so that Organic Light Emitting Diode D1 is luminous, it is at the same time, low level
Secondary signal charges to the first end of the first capacitor C1, and causes that its first end obtains the voltage of secondary signal.
It should be noted that secondary signal is with two kinds of electricity of high level and low level for data-signal, i.e. secondary signal
The voltage signal of pressure condition；In above-mentioned T1, T2 and T3 stage, due to the Capacitance Coupled by image element circuit periphery, electric leakage or
There are the reasons such as decay and makes the voltage generation of secondary signal or the first capacitor first end unstable in a frame shows in person
Phenomenon, the voltage signal by that after the treatment of the first phase inverter TR1, can become stabilization, voltage signal applies transistor seconds
The grid of M2, stably can be controlled to transistor seconds M2, can so make the second crystal under opening
The drain current that pipe M2 is stablized, such that it is able to make the electric current for flowing through Organic Light Emitting Diode D1 more stablize.
Image element circuit provided in an embodiment of the present invention and its driving method, array base palte and display panel, by first
Voltage regulation unit, secondary signal input termination are set between the second pole of transistor and the grid as the transistor seconds of driving tube
The secondary signal of receipts, even if occurring decay due to the Capacitance Coupled by image element circuit periphery, electric leakage or in a frame shows
Produced etc. reason it is unstable, by after voltage regulation unit, the voltage signal that can be stablized, it is brilliant that the voltage signal applies second
The grid of body pipe, stably can be controlled to transistor seconds, can so make the second crystal under opening
It is in control the drain current of stabilization so that the electric current for flowing through Organic Light Emitting Diode is more stablized, such that it is able to improve display surface
The display effect of plate.
Note, 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 the present invention is carried out by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
More other Equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (11)
1. a kind of image element circuit, it is characterised in that including：The first transistor, transistor seconds, Organic Light Emitting Diode and voltage stabilizing
Unit；
The grid of the first transistor is electrically connected with the first signal input part of image element circuit, and the of the first pole and image element circuit
Binary signal input is electrically connected, and the second pole electrically connected by the voltage regulation unit with the grid of the transistor seconds, and described the
Binary signal input receives secondary signal, and the secondary signal is data-signal；
First pole of the transistor seconds and the first power electric connection, the second pole are electric with the anode of the Organic Light Emitting Diode
Connection；
The negative electrode of the Organic Light Emitting Diode is electrically connected with second source, wherein the voltage of the second source is less than described the
The voltage of one power supply；
Wherein, the voltage regulation unit is used to that the data-signal to be carried out to process the voltage signal for becoming stabilization, to keep applying
In the current potential stabilization of the grid of the transistor seconds.
2. image element circuit according to claim 1, it is characterised in that the voltage regulation unit includes the first phase inverter and first
Capacitor；
The input of first phase inverter is electrically connected with the first end of first capacitor, and brilliant with described first
The second pole electrical connection of body pipe, the output end of first phase inverter electrically connects with the grid of the transistor seconds, and described the
Second end of one capacitor is electrically connected with the 3rd signal input part of first power supply, the second source or image element circuit
Connect.
3. image element circuit according to claim 1, it is characterised in that the voltage regulation unit includes latch, wherein, it is described
Latch includes second phase inverter and the 3rd phase inverter of reverse parallel connection electrical connection；
The first end of the latch is electrically connected with the second pole of the first transistor, the second end of the latch with it is described
The grid electrical connection of transistor seconds.
4. image element circuit according to claim 3, it is characterised in that the voltage regulation unit also includes the second capacitor, institute
The first end for stating the second capacitor is electrically connected with the first end of the latch, the second end of second capacitor and described
The 3rd signal input part electrical connection of one power supply, the second source or image element circuit.
5. the image element circuit according to claim 2 or 4, it is characterised in that the 3rd signal input part receives the 3rd to be believed
Number, the 3rd signal is constant high level signal or constant low level signal.
6. the image element circuit according to any one of claim 1-4, it is characterised in that first signal input part is received
First signal, first signal is pulse signal.
7. the image element circuit according to any one of claim 1-4, it is characterised in that the first transistor is NMOS tube
Or PMOS.
8. the image element circuit according to any one of claim 1-4, it is characterised in that the transistor seconds is NMOS tube
Or PMOS.
9. a kind of array base palte, it is characterised in that including the image element circuit as any one of claim 1-8.
10. a kind of display panel, it is characterised in that including array base palte as claimed in claim 9.
A kind of 11. driving methods of image element circuit, image element circuit of the driving method as any one of claim 1-8
To perform, it is characterised in that including：
First signal control the first transistor is opened, and the signal that secondary signal is exported after being processed through voltage regulation unit controls the second crystal
Pipe is opened so that organic light-emitting diode；
First signal controls the first transistor to close, and the signal exported through the voltage regulation unit persistently controls described the
Two-transistor is opened so that the organic light-emitting diode；
First signal controls the first transistor to open, what the secondary signal was exported after being processed through the voltage regulation unit
Signal controls the transistor seconds to close so that the Organic Light Emitting Diode stops luminous.
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| CN201410611987.0A CN104299570B (en) | 2014-11-03 | 2014-11-03 | A kind of image element circuit and its driving method, array base palte and display panel |
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| CN201410611987.0A CN104299570B (en) | 2014-11-03 | 2014-11-03 | A kind of image element circuit and its driving method, array base palte and display panel |
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| CN104299570B true CN104299570B (en) | 2017-06-16 |
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| JP6872571B2 (en) * | 2018-02-20 | 2021-05-19 | セイコーエプソン株式会社 | Electro-optics and electronic equipment |
| CN108877655A (en) * | 2018-07-03 | 2018-11-23 | 深圳吉迪思电子科技有限公司 | A kind of pixel circuit, display screen and electronic equipment |
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| DE102019129212A1 (en) | 2019-10-29 | 2021-04-29 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | PWM controlled power source and process |
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