CN105405402B - Pixel circuit and its driving method, OLED display panel and display device - Google Patents
Pixel circuit and its driving method, OLED display panel and display device Download PDFInfo
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- CN105405402B CN105405402B CN201511019676.6A CN201511019676A CN105405402B CN 105405402 B CN105405402 B CN 105405402B CN 201511019676 A CN201511019676 A CN 201511019676A CN 105405402 B CN105405402 B CN 105405402B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
Abstract
A kind of pixel circuit and its driving method of present invention offer, OLED display panel and display device, including：Multiple row pixel units, gate driving circuit and source electrode drive circuit, each row pixel unit include compensation circuit and multiple sub-pixel units；Each sub-pixel unit includes sub-pixel driving circuit and OLED；The input terminal of compensation circuit is connect by auxiliary data line with source electrode drive circuit, and output end is connect by data line with sub-pixel driving circuit, for generating compensating control signal；Sub-pixel driving circuit shines for controlling OLED, and according to the threshold voltage of compensating control signal compensation for drive transistor；The extending direction of data line is parallel to the direction that the OLED display panel carries out laser beam when ELA crystallizations；To simplify the design of pixel circuit so that the aperture opening ratio of pixel greatly increases, and high-resolution can be realized while obtaining uniformly display, and therefore reduce cost since the number of the transistor of use is reduced.
Description
Technical field
The present invention relates to flat panel display technology fields, and in particular to a kind of pixel circuit and its driving method, OLED are shown
Panel and display device.
Background technology
Active matrix organic light-emitting diode (Active Matrix Organic Light Emitting Diode, letter
Claim AMOLED) show it is a kind of display technology applied in TV and mobile device, with its low-power consumption, low cost, large scale
The characteristics of had broad application prospects in the portable electronic device to sensitive power consumption.
Organic Light Emitting Diode (Organic Light Emitting Diode, abbreviation OLED) in AMOLED can be sent out
The driving current driving just generated by thin film transistor (TFT) (Thin Film Transistor, abbreviation TFT), but due to
Non-uniformity problem of the tft array substrate in technical process, can lead to threshold voltage shift, be shown so as to cause whole image
It is uneven.
Traditional AMOLED generally use 2T1C pixel driver modes utilize a switching thin-film transistor, a driving
Thin film transistor (TFT) and a storage capacitance control shining for diode, and simple with circuit, thin film transistor (TFT) quantity is few
Advantage easily realizes high-resolution, but 2T1C circuits do not have the effect of valve value compensation, and screen body display effect is relatively poor, complete
It is influenced entirely by thin film transistor (TFT) uniformity difference.In existing pixel circuit design, in order to compensate for driving film crystal
The threshold voltage of pipe, it will usually compensation circuit is used, such as in conventional 6T1C pixel circuits, it is mainly thin using six PMOS
Film transistor and a storage capacitance constitute a pixel circuit for individually carrying compensation effect, are mended with good threshold value
Ability is repaid, but the quantity of thin film transistor (TFT) is excessive in compensation circuit, influences the area of single pixel, to influence point
The raising of resolution.
Therefore it is urgent to provide a kind of pixel circuits, you can to reduce the quantity of the thin film transistor (TFT) in single pixel, and has
There is certain compensation effect, to realize high-resolution while obtaining uniform display effect.
Invention content
The purpose of the present invention is to provide a kind of pixel circuit and its driving method, OLED display panel and display device,
The design for simplifying pixel circuit, reduces the quantity of the transistor of single pixel, while having the effect of threshold voltage compensation,
High-resolution can be realized while obtaining uniformly display.
To achieve the above object, the present invention provides a kind of pixel circuit, is applied to OLED display panel, including multiple row pictures
Plain unit, gate driving circuit and source electrode drive circuit, which is characterized in that each row pixel unit include compensation circuit and
Multiple sub-pixel units；Each sub-pixel unit includes sub-pixel driving circuit and OLED；The sub-pixel driving circuit
It include the driving transistor being connect with the OLED；
The input terminal of the compensation circuit is connect by auxiliary data line with the source electrode drive circuit, the compensation circuit
Output end connect with the sub-pixel driving circuit by data line, the compensation circuit be used for according to from the source electrode drive
The control signal of dynamic circuit generates the compensating control signal for being input to the sub-pixel driving circuit；
The sub-pixel driving circuit is connect by scan line with gate driving circuit, for according to from gate driving electricity
The scanning signal on road receives the data voltage from data line, and controlling OLED by the driving transistor shines, and according to
Compensating control signal control when driving transistor driving OLED shines compensates the threshold voltage of the driving transistor；
Also, the OLED display panel is crystallized by the way of quasi-molecule laser annealing in the production process, institute
The extending direction for stating data line is parallel to the direction of laser beam.
Optionally, the compensation circuit includes the first transistor, second transistor, third transistor and the 4th transistor,
Wherein,
The grid of the first transistor is connected with first voltage signal, the grid of the second transistor, the described 4th
The grid of transistor is connected with second voltage signal；
The second electrode of the first transistor is connected with reference power power supply, the first electrode of the first transistor,
The first electrode phase of the second electrode of the second transistor, the grid of the third transistor and the 4th transistor
Even；
The first electrode of the third transistor is connected with the second electrode of the 4th transistor；
The second electrode of the third transistor is connected with auxiliary data line, as the input terminal of the compensation circuit, institute
The first electrode for stating second transistor is connected with data line, the output end as the compensation circuit.
Optionally, the first voltage signal is prior to the second voltage signal.
Optionally, the compensation circuit be set to the OLED display panel effective display area it is overseas, the sub-pixel
Unit is set in the effective display area domain of the OLED display panel.
Optionally, the sub-pixel driving circuit includes driving transistor, switching transistor and storage capacitance, wherein
The grid of the switching transistor is connected with scan line, and first electrode is connected with data line, second electrode with it is described
The grid of driving transistor is connected；
The first electrode of the driving transistor is connected with the anode of the OLED, and second electrode is connected with power cord；Institute
State the minus earth of OLED；
The storage capacitance is connected between the second electrode and grid of the driving transistor.
Optionally, the first electrode is source electrode or drain electrode, and the second electrode is another electricity in source electrode or drain electrode
Pole.
Correspondingly, the present invention also provides a kind of driving method of pixel circuit, it is applied to above-mentioned pixel circuit, the picture
The driving method of plain circuit includes：
First stage：First voltage signal is low level signal with scanning signal, and second voltage signal is believed for high level
Number, the grid voltage initialization of driving transistor；
Second stage：First voltage signal is high level signal, and second voltage signal is low level letter with scanning signal
Number, the grid of the data voltage write driver transistor after compensating；
Phase III：First voltage signal, second voltage signal and scanning signal are high level signal, and OLED shines.
Correspondingly, the present invention also provides a kind of OLED display panel, including above-mentioned pixel circuit.
Correspondingly, the present invention also provides a kind of OLED display, including above-mentioned OLED display panel.
Compared with prior art, pixel circuit and its driving method provided by the invention, OLED display panel and display dress
It sets, the direction for being oriented parallel to data line of laser beam when by the way that OLED display panel progress ELA crystallizations are arranged so that every number
It is consistent according to the ELA laser energies received on line, so that the driving transistor on per data line is consistent, while using each
Multiple sub-pixel unit common compensation circuits in row pixel unit, simplify the design of pixel circuit so that the opening of pixel
Rate greatly increases, to realize high-resolution, and the number of the transistor due to use while obtaining uniformly display
Therefore reducing reduces cost.
Description of the drawings
Fig. 1 is applied to the structural schematic diagram of OLED display panel by the pixel circuit that the embodiment of the present invention one provides；
The structural schematic diagram of compensation circuit in the pixel circuit that Fig. 2 is provided by the embodiment of the present invention one；
The structural schematic diagram for the pixel circuit sub-pixel driving circuit that Fig. 3 is provided by the embodiment of the present invention one；
Circuit work schedule schematic diagram in the pixel circuit drive method that Fig. 4 is provided by the embodiment of the present invention two.
Specific implementation mode
The mainstream crystallization mode of low-temperature polysilicon film transistor (LTPS-TFT) is quasi-molecule laser annealing at present
(ELA) the main reason for crystallization, the threshold voltage that this method for crystallising generates is uneven is that the energy between each laser beams of ELA is difficult
It is completely the same, so as to cause the uneven than more serious of grain size, it is presented as that the strip nurse for being parallel to laser beam is drawn on screen body
(mura).Inventor it has been investigated that, the data line of body and laser beam Parallel Design will be shielded so that the pixel on per data line
Driving transistor is consistent, so as to be compensated for the threshold voltage of the pixel driven transistor between different data line.
After further research, a kind of pixel circuit and its driving method, OLED display panel and aobvious are inventors herein proposed
Showing device.Below in conjunction with the drawings and specific embodiments to pixel circuit proposed by the present invention and its driving method, OLED display surfaces
Plate and display device are described in further details.According to following explanation and claims, advantages and features of the invention will more
It is clear, it should be noted that, attached drawing is all made of very simplified form and uses non-accurate ratio, be only used for conveniently, it is apparent
Ground aids in illustrating the purpose of the embodiment of the present invention.
【Embodiment one】
As shown in Figure 1, the pixel circuit 100 described in the embodiment of the present invention, is applied to OLED display panel, including multiple rows
Pixel unit 110, gate driving circuit 120 and source electrode drive circuit 130, each row pixel unit 110 include compensation electricity
Road 111 and multiple sub-pixel units, each sub-pixel unit includes sub-pixel driving circuit 1121 and OLED 1122；Institute
It includes the driving transistor (not shown) being connect with the OLED1122 to state sub-pixel driving circuit 1121.
The input terminal of the compensation circuit 111 is connect by auxiliary data line Fm with source electrode drive circuit 130, and output end is logical
It crosses data line Dm to connect with the sub-pixel driving circuit 1121, for according to the control from the source electrode drive circuit 130
Signal generates the compensating control signal for being input to the sub-pixel driving circuit 1121.
The sub-pixel driving circuit 1121 is connect by scan line Sn with gate driving circuit 120, is come from for basis
The scanning signal of gate driving circuit 120 receives the data voltage from data line Dm, and institute is controlled by the driving transistor
It states OLED 1122 to shine, and according to the compensating control signal in the luminous time controls of driving transistor driving OLED1122
System compensates the threshold voltage of the driving transistor.
As previously mentioned, the crystallization mode of low-temperature polysilicon film transistor uses excimer laser in OLED display panel
Annealing crystallization will produce the strip nurse drawing for being parallel to laser beam, and in the present invention, the OLED display panel also uses quasi-molecule
Laser annealing mode is crystallized, and the extending direction of the data line Dm is parallel to the direction of laser beam, the mobile side of laser beam
To the extending direction perpendicular to the data line.
The direction for being oriented parallel to data line of laser beam when by the way that OLED display panel progress ELA crystallizations are arranged so that
The ELA laser energies received on per data line Dm are consistent, so that the driving transistor on per data line is consistent, simultaneously
Using multiple sub-pixel unit common compensation circuits in each row pixel unit, the pixel that can be directed between different data line
The threshold voltage of driving transistor compensates, and simplifies the design of pixel circuit so that and the aperture opening ratio of pixel greatly increases, from
And high-resolution can be realized while obtaining uniformly display, and therefore reduced since the number of the transistor of use is reduced
Cost.
Preferably, the compensation circuit 111 be set to the OLED display panel effective display area it is overseas, the sub- picture
Plain unit is set in the effective display area domain of the OLED display panel.
As shown in Fig. 2, the compensation circuit 111 include the first transistor T1, second transistor T2, third transistor T3 and
4th transistor T4.
The grid of the first transistor T1 is connected with first voltage signal Sa1, the grid of the second transistor T2, institute
The grid for stating the 4th transistor T4 is connected with second voltage signal Sa2；The first voltage signal Sa1 is prior to the second voltage
Signal Sa2.The first voltage signal Sa1 and second voltage signal Sa2 can pass through auxiliary by source electrode drive circuit 130
Data line provides, and can also be provided by other external circuits.
The second electrode of the first transistor T1 is connected with reference power power supply Vref, and the of the first transistor T1
One electrode, the second electrode of the second transistor T2, the grid of the third transistor T3 and the 4th transistor T4
First electrode be connected；The first electrode of the third transistor T3 is connected with the second electrode of the 4th transistor T4；Institute
The second electrode for stating third transistor T3 is connected with auxiliary data line, as the input terminal Vdata-in of the compensation circuit, institute
The first electrode for stating second transistor T2 is connected with data line, the output end Vdata-out as the compensation circuit.
The sub-pixel driving circuit includes driving transistor M1, switching transistor M2 and storage capacitance C, please refers to figure
Shown in 3, the grid of the switching transistor M1 is connected with scan line Sn, and first electrode is connected with data line, second electrode and institute
The grid for stating driving transistor is connected；The output end Vdata- of the second electrode connection compensation circuit of the i.e. described switching transistor M1
out；The first electrode of the driving transistor is connected with the anode of the OLED, and second electrode is connected with power cord Vdd；It is described
The minus earth of OLED；The storage capacitance C is connected between the second electrode and grid of the driving transistor M1.
The present invention compensates data voltage Vdata by compensation circuit, is compensated to threshold voltage to reach
Purpose, the design of pixel circuit is simple so that the aperture opening ratio of pixel greatly increases, to while obtaining uniformly display
It can realize high-resolution, and therefore cost is reduced since the number of the transistor of use is reduced.
The transistor used in all embodiments of the invention all can be thin film transistor (TFT) or field-effect tube or other characteristics
Identical device.In the present embodiment, the first electrode is drain electrode or source electrode, and the second electrode is another in source electrode or drain electrode
One electrode, i.e., the described first electrode are drain electrode, then the second electrode is source electrode, if the first electrode is source electrode, institute
It is drain electrode to state second electrode.
【Embodiment two】
The present embodiment provides a kind of driving methods of pixel circuit, using the pixel circuit described in embodiment one, the picture
The driving method of plain circuit includes：
First stage：First voltage signal is low level signal with scanning signal, and second voltage signal is believed for high level
Number, the grid voltage initialization of driving transistor；
Second stage：First voltage signal is high level signal, and second voltage signal is low level letter with scanning signal
Number, the grid of the data voltage write driver transistor after compensating；
Phase III：First voltage signal, second voltage signal and scanning signal are high level signal, and OLED shines.
It please refers to shown in Fig. 4, when circuit works in the pixel circuit drive method provided by the embodiment of the present invention two
Sequence schematic diagram.Specifically, first stage t1, first voltage signal Sa1 and scanning signal Sn are low level signal, second voltage
Signal Sa2 is high level signal, and the grid voltage of driving transistor is equal to Vref, i.e. grid voltage initializes；Second stage t2：
First voltage signal Sa1 is high level signal, and second voltage signal Sa2 and scanning signal Sn is low level signal, compensates it
The voltage of the grid of data voltage write driver transistor afterwards, write-in is Vdata- | Vth |；Phase III t3：First voltage
Signal Sa1, second voltage signal Sa2 and scanning signal Sn are high level signal, and OLED shines.Due to the grid of driving transistor
Pole tension is maintained at Vdata- | Vth |, according to β/2 formula Idata=(Vgs-Vth)2And Vgs=Vdd- grid voltages can be with
It obtains, β/2 Idata=(Vdd-Vdata)2, wherein Idata is the drain terminal electric current of driving transistor, and β is a constant, and Vgs is to drive
Dynamic voltage between transistor source and grid, Vth are the threshold voltage of driving transistor, and Vdd is supply voltage.Even if therefore
The threshold voltage vt h of driving transistor has fluctuation, and drain terminal electric current Idata also keeps stable, so that the electric current for passing through OLED
Also it keeps stablizing, to realize the compensation of threshold voltage between different data line.
【Embodiment three】
The present embodiment provides a kind of OLED display panel, the OLED display panel includes the pixel electricity described in embodiment one
Road.
With the pixel circuit described in embodiment one in the OLED display panel of the present embodiment, by the way that OLED display surfaces are arranged
Plate carries out the direction for being oriented parallel to data line of laser beam when ELA crystallizations so that the ELA laser energy received on per data line
Amount is consistent, so that the driving transistor on per data line is consistent, while using multiple sons in each row pixel unit
Pixel unit common compensation circuit is compensated for the threshold voltage of the pixel driven transistor between different data line, letter
The design of pixel circuit is changed so that the aperture opening ratio of pixel greatly increases, to be realized while obtaining uniformly display
High-resolution, and therefore reduce cost since the number of the transistor of use is reduced.
【Example IV】
The present embodiment provides a kind of OLED display, the OLED display includes the OLED described in embodiment three aobvious
Show panel.
Display device in the present embodiment has the OLED display panel in embodiment three, by the way that OLED display panel is arranged
Carry out the direction for being oriented parallel to data line of laser beam when ELA crystallizations so that the ELA laser energies received on per data line
Unanimously, so that the driving transistor on per data line is consistent, while using multiple sub- pictures in each row pixel unit
Plain units shared compensation circuit, compensates for the threshold voltage of the pixel driven transistor between different data line, simplifies
The design of pixel circuit so that the aperture opening ratio of pixel greatly increases, to realize height while obtaining uniformly display
Resolution ratio, and therefore reduce cost since the number of the transistor of use is reduced.
In conclusion pixel circuit provided by the invention and its driving method, OLED display panel and display device, pass through
The direction for being oriented parallel to data line that OLED display panel carries out laser beam when ELA crystallizations is set so that per on data line
The ELA laser energies of reception are consistent, so that the driving transistor on per data line is consistent, while using each row pixel
Multiple sub-pixel unit common compensation circuits in unit, for the threshold value electricity of the pixel driven transistor between different data line
Pressure compensates, and simplifies the design of pixel circuit so that the aperture opening ratio of pixel greatly increases, to what is uniformly shown in acquisition
High-resolution can be realized simultaneously, and therefore reduces cost since the number of the transistor of use is reduced.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (8)
1. a kind of pixel circuit is applied to OLED display panel, including multiple row pixel units, gate driving circuit and source electrode drive
Dynamic circuit, which is characterized in that each row pixel unit includes compensation circuit and multiple sub-pixel units；Each sub- picture
Plain unit includes sub-pixel driving circuit and OLED；The sub-pixel driving circuit includes the driving crystal being connect with the OLED
Pipe；
The input terminal of the compensation circuit is connect by auxiliary data line with the source electrode drive circuit, the compensation circuit it is defeated
Outlet is connect by data line with the sub-pixel driving circuit, and the compensation circuit is used for according to from source drive electricity
The control signal on road generates the compensating control signal for being input to the sub-pixel driving circuit；
The sub-pixel driving circuit is connect by scan line with gate driving circuit, for according to from gate driving circuit
Scanning signal receives the data voltage from data line, and controlling OLED by the driving transistor shines, and according to described
Compensating control signal control when driving transistor driving OLED shines compensates the threshold voltage of the driving transistor；
Also, the OLED display panel is crystallized by the way of quasi-molecule laser annealing in the production process, the number
The direction of laser beam is parallel to according to the extending direction of line；
The compensation circuit includes the first transistor, second transistor, third transistor and the 4th transistor, wherein
The grid of the first transistor is connected with first voltage signal, the grid of the second transistor, the 4th crystal
The grid of pipe is connected with second voltage signal；
The second electrode of the first transistor is connected with reference power power supply, the first electrode of the first transistor, described
The first electrode of the second electrode of second transistor, the grid of the third transistor and the 4th transistor is connected；
The first electrode of the third transistor is connected with the second electrode of the 4th transistor；
The second electrode of the third transistor is connected with auxiliary data line, as the input terminal of the compensation circuit, described
The first electrode of two-transistor is connected with data line, the output end as the compensation circuit.
2. pixel circuit as described in claim 1, which is characterized in that the first voltage signal is believed prior to the second voltage
Number.
3. pixel circuit as described in claim 1, which is characterized in that the compensation circuit is set to the OLED display panel
Effective display area it is overseas, the sub-pixel unit is set in the effective display area domain of the OLED display panel.
4. pixel circuit as described in claim 1, which is characterized in that the sub-pixel driving circuit include driving transistor,
Switching transistor and storage capacitance, wherein
The grid of the switching transistor is connected with scan line, and first electrode is connected with data line, second electrode and the driving
The grid of transistor is connected；
The first electrode of the driving transistor is connected with the anode of the OLED, and second electrode is connected with power cord；It is described
The minus earth of OLED；
The storage capacitance is connected between the second electrode and grid of the driving transistor.
5. pixel circuit as described in claim 1 or 4, which is characterized in that the first electrode is source electrode or drain electrode, described the
Two electrodes are another electrode in source electrode or drain electrode.
6. a kind of driving method of pixel circuit, which is characterized in that be applied to pixel circuit as claimed in claim 1 or 2, institute
The driving method for stating pixel circuit includes：
First stage：First voltage signal is low level signal with scanning signal, and second voltage signal is high level signal, is driven
The grid voltage initialization of dynamic transistor；
Second stage：First voltage signal is high level signal, and second voltage signal and scanning signal are low level signal, is mended
The grid of data voltage write driver transistor after repaying；
Phase III：First voltage signal, second voltage signal and scanning signal are high level signal, and OLED shines.
7. a kind of OLED display panel, which is characterized in that including pixel circuit such as according to any one of claims 1 to 5.
8. a kind of OLED display, which is characterized in that including the OLED display panel described in claim 7.
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| CN106531068A (en) * | 2016-12-27 | 2017-03-22 | 北京集创北方科技股份有限公司 | Organic electroluminesence display device |
| CN107195274B (en) * | 2017-05-02 | 2019-03-15 | 深圳市华星光电技术有限公司 | Pixel compensation circuit, scan drive circuit and display device |
| US10460664B2 (en) | 2017-05-02 | 2019-10-29 | Shenzhen China Star Technology Co., Ltd | Pixel compensation circuit, scanning driving circuit and display device |
| TWI681378B (en) * | 2018-11-15 | 2020-01-01 | 友達光電股份有限公司 | Display panel |
| TWI725768B (en) * | 2020-03-12 | 2021-04-21 | 友達光電股份有限公司 | Light emitting element driving circuit and related display panel |
| CN113113462B (en) * | 2021-04-14 | 2023-08-11 | 武汉京东方光电科技有限公司 | Display panel and display device |
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| CN104036726A (en) * | 2014-05-30 | 2014-09-10 | 京东方科技集团股份有限公司 | Pixel circuit and driving method, organic light-emitting diode (OLED) display panel and device thereof |
| CN104157238A (en) * | 2014-07-21 | 2014-11-19 | 京东方科技集团股份有限公司 | Pixel circuit, driving method of pixel circuit, and display device adopting pixel circuit |
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| KR100922071B1 (en) * | 2008-03-10 | 2009-10-16 | 삼성모바일디스플레이주식회사 | Pixel and Organic Light Emitting Display Using the same |
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| CN1361510A (en) * | 2000-12-29 | 2002-07-31 | 三星Sdi株式会社 | Organic electric lighting displaying device and its driving method and picture element circuit |
| CN101976546A (en) * | 2010-10-19 | 2011-02-16 | 友达光电股份有限公司 | Pixel circuits with power voltage drop compensation functions and luminous panel |
| CN104252837A (en) * | 2013-06-28 | 2014-12-31 | 乐金显示有限公司 | Organic light emitting display device and method of driving same |
| CN104036726A (en) * | 2014-05-30 | 2014-09-10 | 京东方科技集团股份有限公司 | Pixel circuit and driving method, organic light-emitting diode (OLED) display panel and device thereof |
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| CN105405402A (en) | 2016-03-16 |
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