CN106920510B - Organic light emitting display and its driving method - Google Patents
Organic light emitting display and its driving method Download PDFInfo
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- CN106920510B CN106920510B CN201510990653.3A CN201510990653A CN106920510B CN 106920510 B CN106920510 B CN 106920510B CN 201510990653 A CN201510990653 A CN 201510990653A CN 106920510 B CN106920510 B CN 106920510B
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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
-
- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
Abstract
The present invention provides a kind of organic light emitting display and its driving methods, wherein the organic light emitting display includes: multiple pixel unit and at least one compensation circuit in matrix arrangement；The multiple pixel unit shares at least one described compensation circuit, and the compensation circuit is used to compensate the drive transistor threshold voltage of the pixel unit.In organic light emitting display provided by the invention and its driving method, in such a way that multiple pixel units share a compensation circuit, it is not only able to realize the compensation of drive transistor threshold voltage, brightness disproportionation caused by avoiding because of threshold voltage deviation, and the quantity of the transistor in the pixel unit can be reduced, to realize higher pixel density, and then improve the resolution ratio of the organic light emitting display.
Description
Technical field
The present invention relates to technical field of flat panel display, in particular to a kind of organic light emitting display and its driving method.
Background technique
Organic light emitting display utilizes Organic Light Emitting Diode (full name in English Organic Lighting Emitting
Diode, abbreviation OLED) display image is a kind of display that active is luminous, display mode and traditional thin film transistor (TFT) liquid
Crystal display (full name in English Thin Film Transistor liquid crystal display, abbreviation TFT-LCD) is shown
Show mode difference, be not necessarily to backlight, moreover, have contrast height, fast response time, it is frivolous many advantages, such as.Therefore, You Jifa
Optical display unit is known as that the display of a new generation of Thin Film Transistor-LCD can be replaced.
Organic light emitting display includes multiple pixels for displaying images, and multiple pixels are arranged with matrix pattern, each
Pixel includes Organic Light Emitting Diode and and the pixel circuit to drive Organic Light Emitting Diode.Simplest 2T1C type pixel
Circuit is made of two transistors and a storage capacitance, has the characteristics that circuit is simple, number of transistors is few, but do not have threshold
The effect that value complement is repaid.Using the organic light emitting display of 2T1C type pixel circuit, display effect is completely uniform by transistor
The influence of the difference of property, brightness uniformity are excessively poor.
And most widely used 6T2C type pixel circuit is made of six transistors and two storage capacitances, has good threshold
It is worth compensation ability.It can be improved the brightness uniformity of organic light emitting display using 6T2C type pixel circuit, but due to pixel electricity
The number of transistors that road uses is excessive, will affect the area of single pixel, therefore is unfavorable for improving point of organic light emitting display
Resolution.
Base this, asking for brightness uniformity and resolution ratio can not be improved simultaneously by how solving existing organic light emitting display
Topic, at those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The purpose of the present invention is to provide a kind of organic light emitting display and its driving methods, to solve existing organic hair
Optical display unit can not improve the problem of brightness uniformity and resolution ratio simultaneously.
To solve the above problems, the present invention provides a kind of organic light emitting display, comprising: multiple pixels in matrix arrangement
Unit and at least one compensation circuit；The multiple pixel unit shares at least one described compensation circuit, the compensation circuit
For compensating the drive transistor threshold voltage of the pixel unit.
Optionally, in the organic light emitting display, the pixel unit includes an Organic Light Emitting Diode and use
In the pixel circuit for driving the Organic Light Emitting Diode；
The Organic Light Emitting Diode is connected between the first power supply and second source；
The pixel circuit includes switching transistor, driving transistor and storage；The switching transistor connection
Between first node and second node, grid is connected to scan line；The driving transistor is connected to the first power supply and has
Between the anode of machine light emitting diode, grid is connected to first node；The storage is connected to the first power supply and
Between one node.
Optionally, in the organic light emitting display, the compensation circuit includes: third transistor, the 4th crystal
Pipe and the 5th transistor；The third transistor is connected between data line and the source electrode of the 4th transistor, and grid is connected to
Two control lines；4th transistor is connected between second node and the drain electrode of third transistor, and grid is connected to second
Node；5th transistor is connected between third power supply and second node, and grid is connected to the first control line.
Optionally, in the organic light emitting display, the 4th transistor and driving transistor are having the same
Threshold voltage.
Optionally, in the organic light emitting display, the third power supply is low level voltage source, for providing just
Beginningization voltage.
Optionally, in the organic light emitting display, the driving transistor is provided to the organic light-emitting diodes
The first supply voltage that the data voltage and first power supply that the electric current of pipe is provided by the data line provide codetermines, and
It is unrelated with the second source voltage and drive transistor threshold voltage that the second source provides.
Optionally, in the organic light emitting display, the pixel unit that same data line is connected shares same
A compensation circuit.
Optionally, in the organic light emitting display, all pixel units share the same compensation circuit.
Correspondingly, the present invention also provides a kind of driving method of organic light emitting display, the organic light emitting display
Driving method include first time period, second time period and third period, wherein
In first time period, the pixel unit of organic light emitting display is initialized, the organic light emitting display
Multiple pixel units share at least one compensation circuit；
In second time period, the pixel unit is written into data-signal, while it is brilliant to carry out driving to the pixel unit
The sampling of body pipe threshold voltage；
In the third period, the pixel unit shows figure by emitting with the light with data-signal corresponding bright
Picture.
Optionally, in the driving method of the organic light emitting display, in first time period, what scan line provided is swept
Retouching signal is low level, and the control signal that the first control line provides becomes low level, the control that the second control line provides from high level
Signal processed is high level, and the data-signal that data line provides is high level；
In second time period, the scanning signal that scan line provides keeps low level, the control signal that the second control line provides
Low level is become from high level, the control signal that the first control line provides is high level, and the data-signal that data line provides is low
Level；
In the third period, the scanning signal that scan line provides becomes high level, the first control line and second from low level
The control signal that control line provides keeps high level, and the data-signal that data line provides is high level.
In organic light emitting display provided by the invention and its driving method, a benefit is shared using multiple pixel units
The mode for repaying circuit is not only able to realize the compensation of drive transistor threshold voltage, bright caused by avoiding because of threshold voltage deviation
Degree is uneven, and can reduce the quantity of the transistor in the pixel unit, to realize higher pixel density, Jin Erti
The resolution ratio of the high organic light emitting display.
Detailed description of the invention
Fig. 1 is the partial structure diagram of the organic light emitting display of the embodiment of the present invention one；
Fig. 2 is the pixel unit of the embodiment of the present invention one and the structural schematic diagram that compensation circuit is connect；
Fig. 3 is the timing diagram of the driving method of the organic light emitting display of the embodiment of the present invention one；
Fig. 4 is the partial structure diagram of the organic light emitting display of the embodiment of the present invention two.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of organic light emitting display proposed by the present invention and its driving method
It is described in further detail.According to following explanation and claims, advantages and features of the invention will be become apparent from.It should be noted
It is that attached drawing is all made of very simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating this hair
The purpose of bright embodiment.
[embodiment one]
Referring to FIG. 1, its partial structure diagram for the organic light emitting display of the embodiment of the present invention one.Such as Fig. 1 institute
Show, the organic light emitting display 100 includes: multiple pixel unit 110 and at least one compensation circuit in matrix arrangement
120；The multiple pixel unit 110 shares at least one described compensation circuit 120, and the compensation circuit 120 is for compensating institute
State the drive transistor threshold voltage of pixel unit 110.
Specifically, the organic light emitting display 100 includes display area and non-display area (not shown), it is described
Display area includes scan line (not shown) and data line (Di, Di+1) arranged in a crossed manner, and the data line is along row side
To extension and along column direction sequential, the scan line extends along column direction and along line direction sequential.It is described
In the intersection region that multiple pixel units 110 are arranged in the scan line in the matrix form and data line limits, each pixel list
First 110 corresponding scan lines are connected with data line, for showing image.The compensation circuit 120 and multiple pixel lists
Member 110 is electrically connected, for compensating the drive transistor threshold voltage for sharing the pixel unit 110 of the compensation circuit 120.Institute
Stating compensation circuit 120 can be set in display area, also can be set in non-display area, specific location can be according to actual needs
It is configured, it is not limited here.
Referring to FIG. 2, it is the structural schematic diagram that the pixel unit of the embodiment of the present invention one is connect with compensation circuit.Such as figure
Shown in 2, the pixel unit 110 is connect with the first external power supply and second source, and first power supply is high potential pixel
Power supply, for providing the first supply voltage Vdd, the second source is low potential pixel power, for providing second source electricity
Vss is pressed, first power supply and second source are used as the driving power of the Organic Light Emitting Diode OLED.It should be appreciated that this
The high potential pixel power at place is for low potential pixel power herein, that is, the potential of first power supply is opposite
Higher in second source, the potential of the second source is lower relative to the first power supply.
With continued reference to FIG. 2, the pixel unit 110 includes an Organic Light Emitting Diode OLED and described has for driving
The pixel circuit of machine light emitting diode OLED, the Organic Light Emitting Diode OLED be connected to the first power supply and second source it
Between.The pixel circuit includes switching transistor M1, driving transistor M2 and storage Cs；The switching transistor M1 connects
It connects between first node N1 and second node N2, grid is connected to scan line Sn；The driving transistor M2 is connected to
Between one power supply and the anode of Organic Light Emitting Diode OLED, grid is connected to first node N1；The storage Cs
It is connected between the first power supply and first node N1.
With continued reference to FIG. 2, the compensation circuit 120 connects with the external third power supply for providing initialization voltage Vref
It connects, the compensation circuit 120 includes: third transistor M3, the 4th transistor M4 and the 5th transistor M5；The third transistor
M3 is connected between data line and the source electrode of the 4th transistor M4, and grid is connected to the second control line Sa2；4th transistor
M4 is connected between second node N2 and the drain electrode of third transistor M3, and grid is connected to second node N2；Described 5th is brilliant
Body pipe M5 is connected between third power supply and second node N2, and grid is connected to the first control line Sa1.
In the present embodiment, first power supply, second source and third power supply are DC voltage sources, the initialization electricity
The voltage value of the voltage value and the second source voltage Vss of pressing Vref is close.
In the present embodiment, the switching transistor M1, driving transistor M2, third transistor M3 are equal to the 5th transistor M5
For thin film transistor (TFT).Preferably, the switching transistor M1, driving transistor M2, third transistor M3 to the 5th transistor M5
It is P-type TFT.
As shown in Fig. 2, data line provides when third transistor M3, the 4th transistor M4 and switching transistor M1 conducting
Data-signal Vdata be successively provided to first node via third transistor M3, the 4th transistor M4 and switching transistor M1
N1, due to the 4th transistor M4 drain electrode and grid be shorted, when the voltage of first node N1 rises to Vdata- | Vth | when the 4th
Transistor M4 becomes ending from being connected.Wherein, Vth is the threshold voltage of the 4th transistor M4.As a result, by data-signal Vdata
Storage Cs is stored in the voltage for reflecting the 4th transistor M4 threshold voltage.
Since the 4th transistor M4 is close with driving transistor M2 structure having the same and position, the 4th transistor M4 with
Drive transistor M2 that there is consistent threshold voltage as mirrored transistor, therefore in Organic Light Emitting Diode OLED light emitting phase
Drive transistor threshold voltage is compensated using the 4th transistor M4.
In the present embodiment, the compensation circuit 120 is electrically connected with the pixel unit 110, by driving the compensation
The pixel circuit of circuit 120 and the pixel unit 110 works, and is not only able to allow organic in the pixel unit 110
Light emitting diode OLED issues the light with data-signal corresponding brightness in response to scanning signal, thus show image, Er Qieneng
The brightness disproportionation caused by the threshold voltage deviation because of driving transistor is enough avoided, and then mentions high display quality.Simultaneously as every
A pixel unit 110 only has 2 transistors and 1 capacitor, and the number of transistors of pixel unit is less in display area, therefore
It can be realized higher pixel density, to improve resolution ratio.Compared with existing organic light emitting display, the organic light emission
Show that device 100 has good brightness uniformity and higher resolution ratio.
Preferably, the pixel unit 110 of same data line connection shares the same compensation circuit 120.
In the present embodiment, the position of the compensation circuit 120 and the position of the data line are corresponded, every data line
The multiple pixel units 110 of the pixel unit 110 of connection, i.e. each column share a compensation circuit 120.
Correspondingly, the present invention also provides a kind of driving methods of organic light emitting display.Incorporated by reference to referring to figs. 2 and 3,
The driving method of the organic light emitting display includes:
Scan period includes first time period T1, second time period T2 and third period T3；Wherein,
In first time period T1, the pixel unit 110 of organic light emitting display is initialized, the organic light emission is aobvious
Show that multiple pixel units 110 of device share at least one compensation circuit；
In second time period T2, data-signal is written into the pixel unit 110, at the same to the pixel unit 110 into
The sampling of row drive transistor threshold voltage；
In third period T3, the pixel unit 110 by transmitting there is brightness light corresponding with data-signal to show
Diagram picture.
Specifically, the scan period of the organic light emitting display 100 successively includes first time period T1, second time period
T2 and third period T3.
With continued reference to FIG. 3, the scanning signal that scan line Sn is provided is low level, the first control in first time period T1
The control signal that line Sa1 is provided becomes low level from high level, and the control signal that the second control line Sa2 is provided is high level, number
High level is kept according to the data-signal Vdata that line provides.Since the scan line Sn scanning signal provided is low level, by scan line
The switching transistor M1 of Sn control is in the conductive state, simultaneously because the control signal that the first control line Sa1 is provided is by high level
Become low level, is become being connected from ending by the first control line Sa1 the 5th transistor M5 controlled, therefore the offer of third power supply
Initialization voltage Vref is provided to first node N1 via the 5th transistor M5 and switching transistor M1, to utilize third power supply
Pixel unit 110 is initialized.
First time period T1 is initialization time section, during this period using third power supply to the pixel of organic light emitting display
Unit 110 is initialized, and multiple pixel units 110 share at least one compensation circuit 120 in organic light emitting display.Just
After beginningization, the voltage of the first node N1 of the pixel unit 110 is Vref, i.e. the lower substrate voltage of storage Cs becomes
For Vref.
With continued reference to FIG. 3, the scanning signal that scan line Sn is provided keeps low level, the second control in second time period T2
The control signal that line Sa2 processed is provided becomes low level from high level, and the control signal that the first control line Sa1 is provided keeps high electricity
Flat, the data-signal Vdata that data line provides keeps low level.Since the first control line Sa1 control signal provided keeps high
Level, the 5th transistor M5 are in off state, and the initialization voltage Vref that third power supply provides can not be via the 5th transistor
M5 and switching transistor M1 are provided to first node N1.
At this point, since the scan line Sn scanning signal provided keeps low level, the switching transistor controlled by scan line Sn
M1 is still on state, since the second control line Sa2 control signal provided becomes low level from high level, by the second control
The third transistor M3 of line Sa2 control becomes being connected from ending, and the data-signal Vdata that data line provides is via third transistor
M3 starts in writing pixel, since switching transistor M1, third transistor M3 and the 4th transistor M4 are both turned at this time, data line
The data-signal Vdata of offer is successively provided to first via third transistor M3, the 4th transistor M4 and switching transistor M1
The voltage of node N1, first node N1 are begun to ramp up by Vref, when the voltage of first node N1 rises to Vdata- | Vth | when
Four transistor M4 become ending from being connected.
Second time period T2 is programming time section, the data-signal Vdata for during this period providing data line and reflection
The voltage of the threshold voltage of mirrored transistor M4 is stored in storage Cs, thus complete while data-signal is written
The sampling of pairs of mirrored transistor threshold voltage.At this point, the voltage of first node N1, that is, storage Cs lower substrate voltage
Equal to Vdata- | Vth |.
With continued reference to FIG. 3, the scanning signal that scan line Sn is provided becomes high electricity from low level in third period T3
Flat, the control signal that the first control line Sa1 and the second control line Sa2 are provided keeps high level, the data letter that data line provides
Number Vdata keeps high level.Since the scan line Sn scanning signal provided becomes high level from low level, controlled by scan line Sn
Switching transistor M1 become ending from being connected, since the control signal that the first control line Sa1 and the second control line Sa2 are provided is equal
High level is kept, by the first control line Sa1 the 5th transistor M5 controlled and the third transistor controlled by the second control line Sa2
M3 is in off state.At this point, the voltage of first node N1 remains Vdata- | Vth |.
Third period T3 is fluorescent lifetime section, due to driving transistor M2 conducting, the driving of driving transistor M2 output
Electric current Ion, through driving the path of transistor M2 and Organic Light Emitting Diode OLED to flow to second source, causes to have along the first power supply
Machine light emitting diode OLED light it is luminous, the pixel unit 110 by transmitting have brightness light corresponding with data-signal come
Show image.
Wherein, the first supply voltage that the electric current Ion and the first power supply for flowing through the Organic Light Emitting Diode OLED are provided
Vdd is related with data voltage Vdata, and the second source voltage Vss and driving transistor threshold electricity provided with second source
It presses all not related.
In the present embodiment, the benefit to drive transistor threshold voltage can be realized using the threshold voltage of mirrored transistor M4
Repay, therefore even if deviation occurs in drive transistor threshold voltage, as the threshold voltage of mirrored transistor M4 and mended
It repays, the electric current Ion for flowing through the Organic Light Emitting Diode OLED will not be impacted.
The course of work of first time period T1, second time period T2 and third period T3 are repeated, image is completed and shows function
Energy.
[embodiment two]
Referring to FIG. 4, its partial structure diagram for the organic light emitting display of the embodiment of the present invention two.Such as Fig. 4 institute
Show, the organic light emitting display 100 includes: multiple pixel unit 110 and at least one compensation circuit in matrix arrangement
120；The multiple pixel unit 110 shares at least one described compensation circuit 120, and the compensation circuit 120 is for compensating institute
State the drive transistor threshold voltage of pixel unit 110.
Specifically, as shown in figure 4, the two column pixel units 110 that adjacent two data lines are connected share the same benefit
Repay circuit 120.I.e. first row pixel unit 110 and secondary series pixel unit 110 share first compensation circuit 120, third column
Pixel unit 110 and the 4th column pixel unit 110 share second compensation circuit 120, and so on.
The present embodiment and embodiment one the difference is that, the two column pixel units 110 that adjacent two datas line is connected
The same compensation circuit 120 is shared, rather than the pixel unit 110 that each data line is connected shares a compensation circuit
120, the organic light emission shows that the quantity of compensation circuit 120 in device 100 is less.
In other embodiments, more than three, four, the pixel unit 110 that even more multiple data lines are connected share it is same
The pixel that the pixel unit 110 that a compensation circuit 120 or a data line are connected can be connect with other data lines respectively
Unit 110 shares the same compensation circuit 120.Wherein, all pixel units 110 share the same compensation circuit 120, i.e., and
When one column pixel unit 110 to m column (last column) pixel unit 110 shares the same compensation circuit 120, compensation circuit
120 minimum number.
Preferably, adjacent pixel unit 110 shares the same compensation circuit 120.In this way, the long-range of threshold voltage is uneven
Even property is eliminated.
For purposes of brevity, Fig. 1 and Fig. 4 illustrates only two data lines (Di and Di+1) and six pixel units.This
Field is it should be understood to the one skilled in the art that the case where example above is also applied for more multiple data lines and more pixel units.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment emphasis is said
Bright is the difference from other embodiments, and the same or similar parts in each embodiment may refer to each other.
To sum up, it in organic light emitting display provided by the invention and its driving method, is shared using multiple pixel units
The mode of one compensation circuit is not only able to realize the compensation of drive transistor threshold voltage, avoids drawing because of threshold voltage deviation
The brightness disproportionation risen, and the quantity of the transistor in the pixel unit can be reduced, thus realize higher pixel density,
And then improve the resolution ratio of the organic light emitting display.
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 (10)
1. a kind of organic light emitting display characterized by comprising multiple pixel units and at least one benefit in matrix arrangement
Repay circuit；The multiple pixel unit shares at least one described compensation circuit, and the compensation circuit is for compensating the pixel
The threshold voltage of the driving transistor of unit；
The pixel unit includes an Organic Light Emitting Diode and the pixel circuit for driving the Organic Light Emitting Diode, institute
Stating pixel circuit includes switching transistor, the driving transistor and storage, the grid of the driving transistor and institute
It states storage and is connected to first node, the compensation circuit includes the 4th transistor；Wherein, the 4th transistor
Drain and gate is shorted, and the data-signal that data line provides successively is provided via the 4th transistor and the switching transistor
To the first node, the data-signal and the voltage for reflecting the 4th transistor threshold voltage are stored in the storage
Capacitor.
2. organic light emitting display as described in claim 1, which is characterized in that the Organic Light Emitting Diode is connected to first
Between power supply and second source；
The switching transistor is connected between first node and second node, and grid is connected to scan line；The driving is brilliant
Body pipe is connected between the first power supply and the anode of Organic Light Emitting Diode, and grid is connected to first node；The storage electricity
Container is connected between the first power supply and first node.
3. organic light emitting display as claimed in claim 2, which is characterized in that the compensation circuit further include: third crystal
Pipe and the 5th transistor；The third transistor is connected between data line and the source electrode of the 4th transistor, and grid is connected to
Two control lines；4th transistor is connected between second node and the drain electrode of third transistor, and grid is connected to second
Node；5th transistor is connected between third power supply and second node, and grid is connected to the first control line.
4. organic light emitting display as claimed in claim 3, which is characterized in that the 4th transistor and driving transistor tool
There is identical threshold voltage.
5. organic light emitting display as claimed in claim 3, which is characterized in that the third power supply is low level voltage source,
For providing initialization voltage.
6. organic light emitting display as claimed in claim 3, which is characterized in that the driving transistor is provided to described organic
The first supply voltage that the data voltage and first power supply that the electric current of light emitting diode is provided by the data line provide is total to
With decision, and it is unrelated with the second source voltage and drive transistor threshold voltage that the second source provides.
7. organic light emitting display as described in claim 1, which is characterized in that the pixel unit that same data line is connected
Share the same compensation circuit.
8. organic light emitting display as described in claim 1, which is characterized in that all pixel units share the same compensation
Circuit.
9. a kind of driving method of such as organic light emitting display described in any item of the claim 1 to 8, which is characterized in that sweep
Retouching the period includes first time period, second time period and third period, wherein
In first time period, the pixel unit of organic light emitting display is initialized, the organic light emitting display it is more
A pixel unit shares at least one compensation circuit；
In second time period, the pixel unit is written into data-signal, while driving transistor is carried out to the pixel unit
The sampling of threshold voltage；
In the third period, the pixel unit shows image by emitting with the light with data-signal corresponding bright.
10. the driving method of organic light emitting display as claimed in claim 9, which is characterized in that
In first time period, the scanning signal that scan line provides is low level, and the control signal that the first control line provides is by high electricity
Flat to become low level, the control signal that the second control line provides is high level, and the data-signal that data line provides is high level；
In second time period, the scanning signal that scan line provides keeps low level, and the control signal that the second control line provides is by height
Level becomes low level, and the control signal that the first control line provides is high level, and the data-signal that data line provides is low level；
In the third period, the scanning signal that scan line provides becomes high level, the first control line and the second control from low level
The control signal that line provides keeps high level, and the data-signal that data line provides is high level.
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| KR102527216B1 (en) * | 2017-09-21 | 2023-04-28 | 삼성디스플레이 주식회사 | Display device |
| TWI662533B (en) * | 2018-05-04 | 2019-06-11 | 友達光電股份有限公司 | Display panel |
| CN108806612B (en) * | 2018-06-13 | 2020-01-10 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| TWI683296B (en) * | 2018-11-19 | 2020-01-21 | 友達光電股份有限公司 | Display panel |
| TWI708230B (en) * | 2018-11-20 | 2020-10-21 | 友達光電股份有限公司 | Display panel |
| CN112639950B (en) * | 2018-12-28 | 2022-11-29 | 深圳市柔宇科技股份有限公司 | Display screen and display device |
| CN113140183B (en) * | 2020-01-19 | 2022-06-10 | 北京小米移动软件有限公司 | OLED display screen display control method and device and storage medium |
| 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 |
| CN111564140B (en) * | 2020-06-12 | 2021-03-26 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN116917979A (en) * | 2021-12-30 | 2023-10-20 | 京东方科技集团股份有限公司 | Pixel group, array substrate and display panel |
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