CN106887207A - Image element circuit and its driving method and OLED - Google Patents
Image element circuit and its driving method and OLED Download PDFInfo
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- CN106887207A CN106887207A CN201510939734.0A CN201510939734A CN106887207A CN 106887207 A CN106887207 A CN 106887207A CN 201510939734 A CN201510939734 A CN 201510939734A CN 106887207 A CN106887207 A CN 106887207A
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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]
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Abstract
In the image element circuit and its driving method and OLED that the present invention is provided, the threshold voltage of third transistor is compensated by the 4th transistor, so that the first supply voltage that the data voltage that is provided by data wire of the electric current that the third transistor is exported and the first power supply are provided is determined, and it is unrelated with the threshold voltage of the third transistor, therefore, it is possible to the brightness disproportionation for avoiding threshold voltage deviation from causing, thus, the display problem caused by threshold voltage shift can be simultaneously avoided using the OLED of the image element circuit and its driving method.
Description
Technical field
The present invention relates to technical field of flat panel display, more particularly to a kind of image element circuit, the drive of the image element circuit
Dynamic method and the OLED with the image element circuit.
Background technology
OLED (OLED) is a kind of emerging flat-panel monitor, is lighted with active, contrasted
Degree height, fast response time, it is frivolous many advantages, such as, be described as that liquid crystal display (LCD) can be replaced
Display of new generation.
Fig. 1 is refer to, it is the structural representation of the image element circuit of the OLED of prior art.Such as
Shown in Fig. 1, existing image element circuit 10 includes the first transistor T1, transistor seconds T2 and storage capacitance
Cs, the grid of the first transistor T1 is connected with scan line Sn, the source electrode of the first transistor T1 with
Data wire Dm is connected, the grid of the transistor seconds T2, the drain electrode of the first transistor T1 and storage electricity
The first substrate for holding Cs is all connected to the source electrode and storage capacitance of first node N1, the transistor seconds T2
The second substrate of Cs is connected with the first power supply ELVDD, and the drain electrode of the transistor seconds T2 has with described
The anode connection of machine light emitting diode OLED, the negative electrode of the Organic Light Emitting Diode OLED and the second electricity
Source ELVSS is connected.
When opening the first transistor T1 by scan line Sn, the data voltage that data wire Dm is provided
Vdata arrives storage capacitance Cs via the first transistor T1 storages, so as to control the transistor seconds T2
Electric current is produced, to drive the Organic Light Emitting Diode OLED to light.
Wherein, the first transistor T1 and transistor seconds T2 are thin film transistor (TFT) (TFT).It is existing
It can be indium gallium zinc oxide thin film transistor (TFT) (IGZO TFT) to have the thin film transistor (TFT) in technology, and it is to adopt
The thin film transistor (TFT) being made of indium gallium zinc oxide (In-Ga-Zn-O, abbreviation IGZO), is that a kind of N-type is thin
Film transistor.Although the process uniformity of IGZO TFT is preferably, under long-time pressurization and hot conditions,
Its threshold voltage vt h occurs drift.The drift value of threshold voltage vt h is different, and display brightness can be caused to go out
Existing difference.This luminance difference is generally relevant with display image before, therefore is rendered as ghost phenomena.
Base this, how to solve existing OLED because threshold voltage shift causes asking for ghost phenomena
Topic, into those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of image element circuit and its driving method and OLED, with
Solve the problems, such as existing OLED because threshold voltage shift causes ghost phenomena.
To solve the above problems, the present invention provides a kind of image element circuit, including：
The first transistor, is connected between the first power supply and first node, and its grid is connected to the first scan line；
Transistor seconds, is connected between data wire and Section Point, and its grid is connected to the second scan line；
Third transistor, is connected between Section Point and the 3rd node, and its grid is connected to first node；
4th transistor, is connected between first node and the 3rd node, and its grid is connected to the second scan line；
5th transistor, is connected between the first power supply and Section Point, and its grid is connected to three scan line；
6th transistor, is connected between the 3rd node and the anode of Organic Light Emitting Diode, the connection of its grid
To three scan line；
First capacitor, is connected between the first power supply and first node；And
Organic Light Emitting Diode, its anode is connected with the drain electrode of the 6th transistor, its negative electrode and second electricity
Source connects.
Optionally, in described image element circuit, first power supply is high potential pixel power, described
Two power supplys are low potential pixel powers, and first power supply and second source are used as the Organic Light Emitting Diode
Driving power supply.
Optionally, in described image element circuit, it is thin that the first transistor to the 6th transistor is N-type
Film transistor.
Optionally, in described image element circuit, the first transistor to the 6th transistor is indium gallium zinc
Oxide thin film transistor.
Optionally, in described image element circuit, it is described first scanning line traffic control the first transistor conducting and
Cut-off, the conducting and cut-off of the second scanning line traffic control transistor seconds and the 4th transistor, the described 3rd
The conducting and cut-off of the scanning transistor of line traffic control the 5th and the 6th transistor.
Optionally, in described image element circuit, the third transistor as driving transistor, described
Three transistors provide the data voltage and institute provided by the data wire to the electric current of the Organic Light Emitting Diode
The first supply voltage for stating the offer of the first power supply is determined, and the second source voltage provided with the second source
And the threshold voltage of third transistor is unrelated.
Optionally, in described image element circuit, also include：Second capacitor, second capacitor connects
It is connected between the first node and the anode of Organic Light Emitting Diode, for compensating and stablizes organic hair
The anode voltage of optical diode.
Accordingly, present invention also offers a kind of driving method of image element circuit, the driving of the image element circuit
Method includes first time period, second time period and the 3rd time period, wherein,
In first time period, the scanning signal that the first scan line is provided is high level, the second scan line and the 3rd
The scanning signal that scan line is provided is low level, opens the first transistor, and the voltage of the first power supply is supplied to
First node；
In second time period, the scanning signal that the second scan line is provided is high level, the first scan line and the 3rd
The scanning signal that scan line is provided is low level, transistor seconds and the 4th transistor is opened, to the 3rd crystal
The threshold voltage of pipe is compensated；
In the 3rd time period, the scanning signal that the first scan line and the second scan line are provided is low level, the 3rd
The scanning signal that scan line is provided is high level, opens the 5th transistor and the 6th transistor, brilliant by the 3rd
Body pipe output current is driving the organic light-emitting diode.
Accordingly, present invention also offers a kind of OLED, the OLED includes
Image element circuit as described above.
It is brilliant by the 4th in the image element circuit and its driving method and OLED that the present invention is provided
Body pipe compensates the threshold voltage of third transistor so that the electric current that the third transistor is exported is by data wire
The first supply voltage that the data voltage of offer and the first power supply are provided determines, and with the third transistor
Threshold voltage is unrelated, therefore, it is possible to the brightness disproportionation for avoiding threshold voltage deviation from causing, thus, using described
The OLED of image element circuit and its driving method can avoid being caused by threshold voltage shift simultaneously
Display problem.
Brief description of the drawings
Fig. 1 is the structural representation of the image element circuit of the OLED of prior art；
Fig. 2 is the structural representation of the image element circuit of the embodiment of the present invention one；
Fig. 3 is the timing diagram of the driving method of the image element circuit of the embodiment of the present invention one；
Fig. 4 is the structural representation of the image element circuit of the embodiment of the present invention two；
Fig. 5 is the structural representation of the OLED of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of image element circuit proposed by the present invention and its driving method and
OLED is described in further detail.It is of the invention excellent according to following explanation and claims
Point and feature will become apparent from.It should be noted that, accompanying drawing is in the form of simplifying very much and using non-accurate
Ratio, be only used to conveniently, lucidly aid in illustrating the embodiment of the present invention purpose.
【Embodiment one】
Fig. 2 is refer to, it is the structural representation of the image element circuit of the embodiment of the present invention one.The image element circuit
20 include：
The first transistor M1, is connected between the first power supply ELVDD and first node N1, and its grid connects
It is connected to the first scan line Sn1；
Transistor seconds M2, is connected between data wire Dm and Section Point N2, and its grid is connected to
Two scan line Sn2；
Third transistor M3, is connected between Section Point N2 and the 3rd node N3, and its grid is connected to
One node N1；
4th transistor M4, is connected between first node N1 and the 3rd node N3, and its grid is connected to
Second scan line Sn2；
5th transistor M5, is connected between the first power supply ELVDD and Section Point N2, and its grid connects
It is connected to three scan line Sn3；
6th transistor M6, is connected between the 3rd node N3 and the anode of Organic Light Emitting Diode OLED,
Its grid is connected to three scan line Sn3；
First capacitor Cs1, is connected between the first power supply ELVDD and first node N1；And
Organic Light Emitting Diode OLED, its anode is connected with the drain electrode of the 6th transistor M6, and it is cloudy
Pole is connected with second source ELVSS.
Specifically, the first power supply ELVDD is high potential pixel power, the second source ELVSS
It is low potential pixel power, the first power supply ELVDD and second source ELVSS is used as organic hair
The driving power supply of optical diode OLED.It should be appreciated that high potential pixel power herein is relative to herein
Low potential pixel power for, i.e. the potential of the first power supply ELVDD is relative to second source
ELVSS is higher, and the potential of the second source ELVSS is relatively low relative to the first power supply ELVDD.
As shown in Fig. 2 the image element circuit 20 is a kind of 6T1C types circuit structure, including 6 transistors
With 1 capacitor.Wherein, the transistor M6 of the first transistor M1 to the 6th are N-type TFT.
In the present embodiment, the transistor M6 of the first transistor M1 to the 6th are IGZO TFT.
Please continue to refer to Fig. 2, the image element circuit 20 controls the first transistor by the first scan line Sn1
M1 is turned on and ended, and controls transistor seconds M2 and the 4th transistor M4 to lead by the second scan line Sn2
Logical and cut-off, controls the 5th transistor M5 and the 6th transistor M6 to turn on and cut by three scan line Sn3
Only.
When the scanning signal that the first scan line Sn1 is provided transits to high level, the first transistor M1 conductings,
Now, the voltage of first node N1 is driven high, third transistor M3 conductings.
When the scanning signal that the second scan line Sn2 is provided transits to high level, transistor seconds M2 and the
Four transistor M4 are both turned on, and the data-signal that data wire Dm is provided is provided to the via transistor seconds M2
Two node N2.
When the scanning signal that three scan line Sn3 is provided transits to high level, the 5th transistor M5 and the
Six transistor M6 are both turned on, and the source electrode of third transistor M3 is connected to the first power supply ELVDD, and the 3rd is brilliant
The driving current of body pipe M3 outputs is along the first power supply ELVDD through the 5th transistor M5, third transistor
M3, the path of the 6th transistor M6 and Organic Light Emitting Diode OLED flow to second source ELVSS, cause
Light Organic Light Emitting Diode OLED luminous.
In the present embodiment, the first capacitor Cs1 is connected between first node N1 and the first power supply ELVDD,
For memory data signal, third transistor M3 as pixel driving transistor, corresponding to first node
The voltage of N1 come control provide to the Organic Light Emitting Diode OLED driving current.The organic light emission
Diode OLED sends the light of corresponding brightness according to the driving current, so that display image.
Third transistor M3 provides the driving current to the Organic Light Emitting Diode OLED by data wire Dm
The first supply voltage Vdd decisions that the data voltage Vdata of offer and the first power supply ELVDD is provided, and
It is unrelated with the second source voltage and the threshold voltage of third transistor M3 that second source ELVSS is provided.
Therefore, brightness as caused by the threshold voltage deviation of transistor can be avoided not using the image element circuit 20
, so improve display display quality, it is to avoid ghost phenomena.
Accordingly, present invention also offers a kind of driving method of image element circuit.Incorporated by reference to referring to figs. 2 and 3,
The driving method of the image element circuit includes：
Scan period includes first time period t1, second time period t2 and the 3rd time period t 3；Wherein,
In first time period t1, the scanning signal that the first scan line Sn1 is provided is high level, the second scan line
The scanning signal that Sn2 and three scan line Sn3 are provided is low level, opens the first transistor M1, by the
The voltage of one power supply ELVDD is supplied to first node N1；
In second time period t2, the scanning signal that the second scan line Sn2 is provided is high level, the first scan line
The scanning signal that Sn1 and three scan line Sn3 is provided is low level, opens transistor seconds M2 and the 4th brilliant
Body pipe M4, the threshold voltage to third transistor M3 is compensated；
In the 3rd time period t 3, the scanning signal that the first scan line Sn1 and the second scan line Sn2 is provided is low
Level, the scanning signal that three scan line Sn3 is provided is high level, opens the 5th transistor M5 and the 6th
Transistor M6, by third transistor M3 output currents driving the Organic Light Emitting Diode OLED to send out
Light.
Specifically, in first time period t1, because the scanning signal of the first scan line Sn1 offers is by low level
It is changed into high level, the first transistor M1 controlled by the first scan line Sn1 is changed into conducting, first from ending
The first supply voltage Vdd that power supply ELVDD is provided is provided to first node N1 via the first transistor M1,
The voltage of first node N1 is driven high.
First time period t1 is initialization time section, during this period using the first power supply ELVDD to the first electricity
Container Cs1 is initialized.After initialization, the voltage of the first node N1 is Vdd, i.e., the first electricity
The infrabasal plate voltage of container Cs1 is changed into Vdd, therefore third transistor M3 is turned on.
In second time period t2, because the scanning signal that the second scan line Sn2 is provided is changed into electricity high from low level
Flat, the transistor seconds M2 and the 4th transistor M4 controlled by the second scan line Sn2 are changed into leading by cut-off
It is logical.Now, transistor seconds M2, third transistor M3 and the 4th transistor M4 are both turned on, so that will
The data-signal provided from data wire Dm is supplied to Section Point N2, at the same time to third transistor M3
Threshold voltage compensate.
Second time period t2 is programming time section, and the data-signal for during this period providing data wire Dm is corresponding
Voltage store in the first capacitor Cs1.Now, the voltage of Section Point N2 is Vdata, due to the
Four transistor M4 conductings cause that the grid of third transistor M3 and drain electrode are shorted, therefore first node N1
Voltage be that the infrabasal plate voltage of the first capacitor Cs1 is changed into Vdata- | Vth |, wherein, Vth is the 3rd crystal
The threshold voltage of pipe M3.
In first time period t1 and second time period t2, because the 6th transistor M6 is in cut-off state, because
This is prevented from driving current and is provided to Organic Light Emitting Diode OLED.
In the 3rd time period t 3, because the scanning signal that three scan line Sn3 is provided is changed into electricity high from low level
Flat, the 5th transistor M5 and the 6th transistor M6 controlled by three scan line Sn3 are changed into leading by cut-off
It is logical.Due to the 5th transistor M5 conductings, the source electrode of third transistor M3 is connected to the first power supply ELVDD,
Simultaneously because the 6th transistor M6 is turned on, third transistor M3 is connected to Organic Light Emitting Diode OLED,
Third transistor M3 provides driving current to Organic Light Emitting Diode OLED.
3rd time period t 3 is fluorescent lifetime section, and Organic Light Emitting Diode OLED will launch electric with by first
The driving electricity that source ELVDD, the 5th transistor M5, third transistor M3 and the 6th transistor M6 are provided
Flow corresponding light.
Now, the source voltage of third transistor M3 is Vdd, and the grid voltage of third transistor M3 is equal to
The voltage of first node N1, i.e. Vdata- | Vth |, therefore, the gate source voltage Vgs of third transistor M3 is (i.e.
Voltage difference between the grid and source electrode of the third transistor M3) computing formula be：
Vgs=Vdd- (Vdata- | Vth |) formula 1；
And the computing formula for flowing through the electric current Ion of the Organic Light Emitting Diode OLED is：
Ion=K × (Vgs- | Vth |)2Formula 2；
Wherein, K is electron mobility, breadth length ratio, the product of unit-area capacitance three of transistor.
Can be obtained according to formula 1 and formula 2：
Ion=K × (Vdd-Vdata)2Formula 3；
Knowable to expression formula based on formula 3, the electric current Ion of the Organic Light Emitting Diode OLED is flowed through only
The the first supply voltage Vdd and constant K provided with data voltage Vdata and the first power supply ELVDD have
Close, the second source voltage and the threshold voltage of third transistor M3 provided with second source ELVSS are all
It doesn't matter.Therefore, even if deviation occurs in the threshold voltage vt h of third transistor M3, also will not be to flowing through
The electric current Ion of the Organic Light Emitting Diode OLED is impacted.Therefore, using the image element circuit 20
And its driving method can realize the compensation of threshold voltage, it is to avoid because of threshold voltage deviation and caused by brightness disproportionation
Phenomenon.
The course of work of first time period t1, second time period t2 and the 3rd time period t 3 is repeated, image is completed
Display function.
【Embodiment two】
Fig. 4 is refer to, it is the structural representation of the image element circuit of the embodiment of the present invention two.The image element circuit
30 include：
The first transistor M1, is connected between the first power supply ELVDD and first node N1, and its grid connects
It is connected to the first scan line Sn1；
Transistor seconds M2, is connected between data wire Dm and Section Point N2, and its grid is connected to
Two scan line Sn2；
Third transistor M3, is connected between Section Point N2 and the 3rd node N3, and its grid is connected to
One node N1；
4th transistor M4, is connected between first node N1 and the 3rd node N3, and its grid is connected to
Second scan line Sn2；
5th transistor M5, is connected between the first power supply ELVDD and Section Point N2, and its grid connects
It is connected to three scan line Sn3；
6th transistor M6, is connected between the 3rd node N3 and the anode of Organic Light Emitting Diode OLED,
Its grid is connected to three scan line Sn3；
First capacitor Cs1, is connected between the first power supply ELVDD and first node N1；
Second capacitor Cs2, is connected between the anode of first node N1 and Organic Light Emitting Diode OLED；
Organic Light Emitting Diode OLED, its anode is connected with the drain electrode of the 6th transistor M6, and it is cloudy
Pole is connected with second source ELVSS.
Specifically, as shown in figure 3, the image element circuit 30 is a kind of 6T2C types circuit structure, including 6
Individual transistor and 2 capacitors.Wherein, the transistors of the first transistor M1 to the 6th are IGZO TFT.
The present embodiment is with the difference of embodiment one：The image element circuit 30 also includes the second capacitor
Cs2, the second capacitor Cs2 is connected to the anode of first node N1 and Organic Light Emitting Diode OLED
Between, for compensating and stablize the anode voltage of the Organic Light Emitting Diode OLED.
Accordingly, present invention also offers a kind of OLED.Fig. 5 is refer to, it is of the invention real
Apply the structural representation of the OLED of example.As shown in figure 5, the OLED includes：
Display unit 100, scanner driver 200 and data driver 300；The display unit 100 includes multiple
Pixel 110, the multiple pixel 110 be distributed in the matrix form scan line (S11, S12, S13 to Sn1,
Sn2, Sn3) and the intersection region of data wire (D1 to Dm) in, each pixel 110 is and scan line
Connected with data wire, the pixel 110 includes image element circuit as described above.
Specifically, the display unit 100 receive from outside (for example, from power supply) provide from the first electricity
Source ELVDD and second source ELVSS, the first power supply ELVDD and second source ELVSS are used as
The driving power supply of pixel 110.
As shown in figure 5, the display unit 100 includes multiple pixels 110, the multiple pixel 110 is in m
The array distribution of × n, wherein, m is the columns of pixel 110, and n is the line number of pixel 110, m >=1, n
≥1.Each pixel 110 is connected to corresponding scan line and data wire, for example, being located at ith row and jth column
The data wire Dj that arranges of scan control line Si0, Si1, Si2 and jth of pixel 110 and the i-th row be connected.
Scan line (including the first scan line Sn1, second scan line Sn2 and three scan line Sn3) with sweep
Retouch driver 200 to connect, the scanner driver 200 is produced and provided (for example, from timing controlled with outside
Unit provide) the corresponding scanning signal of scan control signal.The scanning that the scanning monitor 200 is produced
Signal is sequentially supplied to pixel 110 by scan line respectively.Data wire is connected with data driver 300,
The data driver 300 is produced and the outside data control for providing (for example, being provided from timing control unit)
The corresponding data-signal of signal processed.The data-signal that the data driver 300 is produced passes through data wire D1 extremely
Dm is provided synchronously to pixel 110 with scanning signal.
Incorporated by reference to Fig. 3 and Fig. 5 is referred to, during first time period t1, the first scan line Sn1 is by high level
The first scanning signal be supplied to pixel 110, each pixel 110 is initialised.In the second time period t2 phases
Between, the second scanning signal of high level is supplied to pixel 110 by the second scan line Sn, writes data-signal,
Simultaneously because first node N1 has been initialised during first time period t1, so driving transistor is just
Connected to by diode.During the 3rd time period t 3, data-signal stops write-in, three scan line Sn3
3rd scanning signal of high level is supplied to pixel 110, the pixel 110 has by transmitting to be believed with data
The light of number corresponding bright carrys out display image.
The pixel 110 includes image element circuit as described above, and the image element circuit can be in the volume of each frame
The threshold voltage of journey time period compensation for drive transistor (third transistor M3), so as to avoid threshold voltage from floating
The ghost phenomena that shifting is caused.
To sum up, in the image element circuit and its driving method and OLED that the present invention is provided, pass through
4th transistor compensate third transistor threshold voltage so that the electric current that the third transistor is exported by
The first supply voltage decision that the data voltage and the first power supply that data wire is provided are provided, and it is brilliant with the described 3rd
The threshold voltage of body pipe is unrelated, therefore, it is possible to the brightness disproportionation for avoiding threshold voltage deviation from causing, thus, adopts
Can be avoided simultaneously by threshold voltage shift with the OLED of the image element circuit and its driving method
And the display problem for causing.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention,
Any change, modification that the those of ordinary skill in field of the present invention does according to the disclosure above content, belong to power
The protection domain of sharp claim.
Claims (9)
1. a kind of image element circuit, it is characterised in that including：
The first transistor, is connected between the first power supply and first node, and its grid is connected to the first scan line；
Transistor seconds, is connected between data wire and Section Point, and its grid is connected to the second scan line；
Third transistor, is connected between Section Point and the 3rd node, and its grid is connected to first node；
4th transistor, is connected between first node and the 3rd node, and its grid is connected to the second scan line；
5th transistor, is connected between the first power supply and Section Point, and its grid is connected to three scan line；
6th transistor, is connected between the 3rd node and the anode of Organic Light Emitting Diode, the connection of its grid
To three scan line；
First capacitor, is connected between the first power supply and first node；And
Organic Light Emitting Diode, its anode is connected with the drain electrode of the 6th transistor, its negative electrode and second electricity
Source connects.
2. image element circuit as claimed in claim 1, it is characterised in that first power supply is high potential picture
Plain power supply, the second source is low potential pixel power, and first power supply and second source are as described
The driving power supply of Organic Light Emitting Diode.
3. image element circuit as claimed in claim 1, it is characterised in that the first transistor is to the 6th brilliant
Body pipe is N-type TFT.
4. image element circuit as claimed in claim 3, it is characterised in that the first transistor is to the 6th brilliant
Body pipe is indium gallium zinc oxide thin film transistor (TFT).
5. image element circuit as claimed in claim 1, it is characterised in that the first scanning line traffic control first
The conducting and cut-off of transistor, it is described second scanning line traffic control transistor seconds and the 4th transistor conducting and
Cut-off, the three scan line controls the conducting and cut-off of the 5th transistor and the 6th transistor.
6. image element circuit as claimed in claim 1, it is characterised in that the third transistor is used as driving
Transistor, the third transistor is provided to the electric current of the Organic Light Emitting Diode and provided by the data wire
Data voltage and first power supply provide the first supply voltage determine, and with the second source provide
Second source voltage and third transistor threshold voltage it is unrelated.
7. image element circuit as claimed in claim 1, it is characterised in that also include：Second capacitor, institute
State the second capacitor to be connected between the first node and the anode of Organic Light Emitting Diode, for compensating simultaneously
Stablize the anode voltage of the Organic Light Emitting Diode.
8. a kind of driving method of image element circuit as any one of claim 1 to 7, its feature exists
In, the scan period includes first time period, second time period and the 3rd time period, wherein,
In first time period, the scanning signal that the first scan line is provided is high level, the second scan line and the 3rd
The scanning signal that scan line is provided is low level, opens the first transistor, and the voltage of the first power supply is supplied to
First node；
In second time period, the scanning signal that the second scan line is provided is high level, the first scan line and the 3rd
The scanning signal that scan line is provided is low level, transistor seconds and the 4th transistor is opened, to the 3rd crystal
The threshold voltage of pipe is compensated；
In the 3rd time period, the scanning signal that the first scan line and the second scan line are provided is low level, the 3rd
The scanning signal that scan line is provided is high level, opens the 5th transistor and the 6th transistor, brilliant by the 3rd
Body pipe output current is driving the organic light-emitting diode.
9. a kind of OLED, it is characterised in that including：Such as any one of claim 1 to 7
Described image element circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510939734.0A CN106887207A (en) | 2015-12-15 | 2015-12-15 | Image element circuit and its driving method and OLED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510939734.0A CN106887207A (en) | 2015-12-15 | 2015-12-15 | Image element circuit and its driving method and OLED |
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| CN108231002A (en) * | 2018-01-19 | 2018-06-29 | 昆山国显光电有限公司 | Pixel circuit and its driving method, organic electroluminescence device, display device |
| CN110047383A (en) * | 2019-04-29 | 2019-07-23 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN111223448A (en) * | 2019-09-16 | 2020-06-02 | 友达光电股份有限公司 | Pixel circuit |
| CN111312170A (en) * | 2019-11-13 | 2020-06-19 | 武汉华星光电半导体显示技术有限公司 | Pixel driving circuit and display device |
| WO2020192382A1 (en) * | 2019-03-28 | 2020-10-01 | 京东方科技集团股份有限公司 | Pixel driving circuit, display device and pixel driving method |
| CN112365840A (en) * | 2020-11-24 | 2021-02-12 | 昆山工研院新型平板显示技术中心有限公司 | Display panel compensation method and device and display device |
| CN113066427A (en) * | 2019-12-30 | 2021-07-02 | 乐金显示有限公司 | Pixel circuit, light emitting display device and driving method thereof |
| CN114913812A (en) * | 2021-02-09 | 2022-08-16 | 上海和辉光电股份有限公司 | Pixel circuit, driving method thereof and organic light emitting display device |
| WO2023197361A1 (en) * | 2022-04-12 | 2023-10-19 | 惠州华星光电显示有限公司 | Pixel driving circuit and driving method therefor, and display panel |
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| CN113066427B (en) * | 2019-12-30 | 2024-02-20 | 乐金显示有限公司 | Pixel circuit, light emitting display device and driving method thereof |
| CN112365840A (en) * | 2020-11-24 | 2021-02-12 | 昆山工研院新型平板显示技术中心有限公司 | Display panel compensation method and device and display device |
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| CN114913812A (en) * | 2021-02-09 | 2022-08-16 | 上海和辉光电股份有限公司 | Pixel circuit, driving method thereof and organic light emitting display device |
| WO2023197361A1 (en) * | 2022-04-12 | 2023-10-19 | 惠州华星光电显示有限公司 | Pixel driving circuit and driving method therefor, and display panel |
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Application publication date: 20170623 |