CN109545138A - A kind of pixel circuit, display panel and pixel circuit drive method - Google Patents
A kind of pixel circuit, display panel and pixel circuit drive method Download PDFInfo
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- CN109545138A CN109545138A CN201910023649.8A CN201910023649A CN109545138A CN 109545138 A CN109545138 A CN 109545138A CN 201910023649 A CN201910023649 A CN 201910023649A CN 109545138 A CN109545138 A CN 109545138A
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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]
-
- 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
- G09G3/3233—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 current through the light-emitting element
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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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of pixel circuit, display panel and pixel circuit drive methods, wherein pixel circuit includes the first transistor, the second brilliant pole pipe, switch unit, first capacitor and organic luminescent device；The first transistor is used for the grid of data voltage write-in second transistor；Second transistor is used to provide driving current to organic luminescent device, and driving organic luminescent device shines；Switch unit includes first end, second end and control terminal；The first end of switch unit is electrically connected with the first pole of organic luminescent device, the second end of switch unit is electrically connected with the second pole of organic luminescent device, the control signal that switch unit is used to be inputted according to its control terminal will be connected or be turned off between first end and second end, technical solution provided in an embodiment of the present invention, switch unit can neutralize the electrons and holes that organic luminescent device interface is accumulated, eliminate the built in field of luminescent layer two sides, luminous efficiency is improved, organic luminescent device service life is extended.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of pixel circuits, display panel and pixel circuit
Driving method.
Background technique
Compared to traditional liquid crystal display panel, organic light emitting display panel have that reaction speed is fast, contrast is high and
The features such as visual angle is wide, therefore have been more and more widely used.
Organic light emitting display panel includes organic light emitting display, and organic light emitting display generally includes from bottom to top
Anode layer, hole injection layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer and the cathode layer being stacked.
When OLED device shines, the interface between hole transmission layer and luminescent layer can assemble the hole for not entering luminescent layer, send out
Interface between photosphere and electron transfer layer can assemble the electronics for not entering luminescent layer, in the electronics or sky of interface aggregation
Cave can stop other electronics or hole to enter luminescent layer.With OLED fluorescent lifetime lengthen, can make more and more electronics or
Person's void coalescence can form built in field in luminescent layer two sides, hinder electrons and holes in interface, the electrons and holes of aggregation
Compound, the polarity of organic material in accelerated luminescence layer, so as to cause Organic Light Emitting Diode threshold voltage increase, drop significantly
Therefore the service life of Organic Light Emitting Diode has been greatly shortened in the low luminous efficiency of Organic Light Emitting Diode.
Summary of the invention
The present invention provides a kind of pixel circuit, display panel and pixel circuit drive method, to realize the electricity for eliminating aggregation
The built in field that son and hole are formed in organic luminous layer two sides reduces the polarity of organic material, improves organic luminescent device
Service life.
In a first aspect, the embodiment of the invention provides a kind of pixel circuit, including the first transistor, the second brilliant pole pipe, open
Close unit, first capacitor and organic luminescent device；
The first transistor is used for the grid of data voltage write-in second transistor；
Second transistor is used to provide driving current to organic luminescent device, and driving organic luminescent device shines；
First capacitor is used to keep the voltage of the grid of second transistor in light emitting phase；
Switch unit includes first end, second end and control terminal；The of the first end of switch unit and organic luminescent device
The electrical connection of one pole, the second end of switch unit are electrically connected with the second pole of organic luminescent device, and switch unit is used for according to its control
The control signal of end input processed will be connected or be turned off between first end and second end.
Second aspect, the embodiment of the invention also provides a kind of display panel, the pixel circuit provided including first aspect.
The third aspect, the embodiment of the invention also provides a kind of driving method of pixel circuit, pixel circuit includes first
Transistor, the second brilliant pole pipe, switch unit, first capacitor and organic luminescent device；
Switch unit includes first end, second end and control terminal；The of the first end of switch unit and organic luminescent device
The electrical connection of one pole, the first end of switch unit are electrically connected with the second pole of organic luminescent device；
Driving method includes:
Data write phase inputs scanning signal, the first crystalline substance that data voltage passes through conducting to the grid of the first transistor
The grid of second transistor and the first pole of first capacitor is written in body pipe, to the control terminal of switch unit input the first control letter
Number, it is connected between the first end and second end of switch unit；
Light emitting phase, second transistor generate driving current driving organic luminescent device and shine, the control to switch unit
End inputs second control signal, turns off between the first end and second end of switch unit.
Pixel circuit, display panel and pixel circuit drive method provided in an embodiment of the present invention, by organic light emission
The first of paralleling switch unit between the first pole and the second pole of device, the first end of switch unit and organic luminescent device is extremely electric
Connection, the second end of switch unit are electrically connected with the second pole of organic luminescent device, which can be defeated according to its control terminal
The control signal entered will be connected or be turned off between first end and second end；Pass through the control in data write phase to switch unit
End processed inputs first control signal, makes to be connected between the first end and second end of switch unit, so that organic luminescent device
First pole and the second pole, which are formed, neutralizes circuit, and the electrons and holes of organic luminescent device interface accumulation are carried out by neutralizing circuit
It neutralizes, and then eliminates the built in field that electrons and holes are formed in organic luminescent device luminescent layer two sides, it is organic to reduce luminescent layer
The polarity of luminescent material improves the luminous efficiency of organic luminescent device, extends the service life of organic luminescent device.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of working timing figure of pixel circuit provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 5 is the working timing figure of another pixel circuit provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 8 is the working timing figure of another pixel circuit provided in an embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of another display panel provided in an embodiment of the present invention；
Figure 11 is a kind of flow chart of the driving method of pixel circuit provided in an embodiment of the present invention；
Figure 12 is the flow chart of the driving method of another pixel circuit provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Pixel circuit provided in an embodiment of the present invention includes the first transistor, the second brilliant pole pipe, switch unit, first capacitor
And organic luminescent device；
The first transistor is used for the grid of data voltage write-in second transistor T2；
Second transistor is used to provide driving current to organic luminescent device, and driving organic luminescent device shines；
First capacitor is used to keep the voltage of the grid of second transistor in light emitting phase；
Switch unit includes first end, second end and control terminal；The of the first end of switch unit and organic luminescent device
The electrical connection of one pole, the second end of switch unit are electrically connected with the second pole of organic luminescent device, and switch unit is used for according to its control
The control signal of end input processed will be connected or be turned off between first end and second end.
When shining because of organic luminescent device, under the action of extra electric field, the electricity in hole and cathode generation that anode generates
Son is moved to luminescent layer respectively and is realized in luminescent layer compound.In the motion process of hole and electronics, in luminescent layer and hole
Interface between transport layer can assemble hole, and set electron is assembled in the interface between luminescent layer and electron transfer layer.With
OLED fluorescent lifetime lengthens, and in interface, the electrons and holes of aggregation can shine for more and more electronics or void coalescence
Layer two sides form built in field, hinder the compound of electrons and holes, the polarity of organic material in accelerated luminescence layer, so as to cause
Organic Light Emitting Diode threshold voltage increases, and reduces the luminous efficiency of Organic Light Emitting Diode.Pixel electricity provided in this embodiment
Road, by the paralleling switch unit between the first pole and the second pole of organic luminescent device, switch unit can be according to its control terminal
The control signal of input will be connected or be turned off between first end and second end, and then in switching means conductive, make organic hair
Charging neutrality circuit is formed between the first pole and the second pole of optical device, can make to pass in the luminescent layer of organic luminescent device and hole
The electronics that the hole and luminescent layer assembled at defeated bed boundary are assembled with electron transfer layer interface carries out in time along circuit is neutralized
It neutralizes, so that the hole of the interface of luminescent layer and hole transmission layer aggregation and the interface of luminescent layer and electron transfer layer
The electronics of aggregation tails off, and then eliminates the built in field that electrons and holes are formed in organic luminescent device luminescent layer two sides, so that
The movement of hole and electronics not will receive the obstruction of built in field, improve the luminous efficiency of organic luminescent device；And reduce hair
The polarity of photosphere luminous organic material extends the service life of organic luminescent device.
Above in core of the invention thought, below with reference to the attached drawing in embodiment, to the technology in the embodiment of the present invention
Scheme is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than complete
The embodiment in portion.Based on the embodiments of the present invention, those of ordinary skill in the art without making creative work,
Every other embodiment obtained, shall fall within the protection scope of the present invention.
It illustratively, should referring to FIG. 1, Fig. 1 is a kind of structural schematic diagram of pixel circuit provided in an embodiment of the present invention
Pixel circuit includes the first transistor T1, the second brilliant pole pipe T2, switch unit 100, first capacitor C1 and organic luminescent device D1；
The grid of the first transistor T1 is electrically connected with the first scanning signal input terminal Sn1 of pixel circuit, the first transistor
The first pole of T1 is electrically connected with the data signal input Data of pixel circuit, and the second pole of the first transistor T1 is brilliant with second
The grid of body pipe T2 is electrically connected；
The first pole of second transistor T2 is electrically connected with the first level signal input terminal ELVDD of pixel circuit, and second is brilliant
The second pole of body pipe T2 is connect with the first pole of organic luminescent device D1, the second pole of organic luminescent device D1 and pixel circuit
Second electrical level signal input part ELVEE electrical connection, the first pole of first capacitor C1 are electrically connected with the grid of second transistor T2, the
The second pole of one capacitor C1 is electrically connected with the first pole of second transistor T2.Switch unit 100 include first end M, second end N and
Control terminal G；The first pole of the first end M and organic luminescent device D1 of switch unit 100 are electrically connected, and the second of switch unit 100
End N is electrically connected with the second pole of organic luminescent device D1, and switch unit 100 is used for the control signal inputted according to its control terminal G
It will be connected or turn off between first end and second end.
Wherein, the first level signal input terminal ELVDD is for receiving externally input first supply voltage, second electrical level letter
Number input terminal ELVEE is higher than second source voltage for receiving externally input second source voltage, the first supply voltage, such as
First supply voltage is positive voltage, and second source voltage is negative voltage or the first supply voltage is positive voltage, second source electricity
Pressure is zero.The first pole of the first transistor T1 and second transistor T2 can be source electrode, the first transistor T1 and second transistor
The first pole of T2 can be drain electrode.The first pole of organic luminescent device D1 can be the anode of organic luminescent device D1, You Jifa
The second pole of optical device D1 can be the cathode of organic luminescent device D1.
Fig. 2 is a kind of working timing figure of pixel circuit provided in an embodiment of the present invention, which is suitable for Fig. 1 institute
The pixel circuit shown.The working sequence of pixel circuit shown in Fig. 2 includes data write phase t1 and light emitting phase t2.Below with picture
The first transistor T1, second transistor T2 in plain circuit are to illustrate for P-type transistor.
With reference to Fig. 1 and Fig. 2, specifically, the first scanning signal input terminal Sn1 input is low electricity in data write phase t1
Ordinary mail number, the low level signal are transmitted to the grid of the first transistor T1, and the first transistor T1 is connected, and data voltage passes through
The grid of the first transistor T1 write-in second transistor T2 of conducting and the first pole of first capacitor C1.In data write phase
T1 inputs first control signal to the control terminal of switch unit 100, is connected between the first end and second end of switch unit 100,
So that forming charging neutrality circuit between the first pole organic luminescent device D1 and the second pole, make shining in organic luminescent device D1
Layer and the electronics edge of the hole of hole transmission layer interface aggregation and luminescent layer and the aggregation of electron transfer layer interface neutralize back
Road is neutralized in time.
Light emitting phase t2, the first scanning signal input terminal Sn1 input are high level signal, which is transmitted to the
The grid of one transistor T1 ends the first transistor T1, and because of the memory action of capacitor, first capacitor C1 can keep the second crystal
Pipe T2 grid voltage is constant, and second transistor T2 generates driving current driving organic luminescent device D1 and shines.In light emitting phase t2,
Second control signal is inputted to the control terminal G of switch unit 100, is turned off between the first end M and second end N of switch unit 100,
So that switch unit 100 does not influence organic luminescent device D1 and shines.
It should be noted that first control signal is high level signal, second signal is low level signal；Alternatively, first
Control signal is low level signal, and second control signal is high level signal.
Pixel circuit provided in this embodiment, by being controlled in data write phase to the control terminal of switch unit input first
Signal processed makes to be connected between the first end and second end of switch unit, so that the first pole of organic luminescent device and the second pole
It is formed and neutralizes circuit, so that movement when organic luminescent device shines due to hole and electronics to luminescent layer, in luminescent layer two sides
The electrons and holes of interface accumulation are neutralized by neutralizing circuit, and then are eliminated electrons and holes and sent out in organic luminescent device
The built in field that photosphere two sides are formed improves organic hair so that the movement of hole and electronics not will receive the obstruction of built in field
The luminous efficiency of optical device；And the polarity of luminescent layer luminous organic material is reduced, the use of organic luminescent device D1 is extended
Service life.
Fig. 3 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention.Optionally, switch unit 100
Including third transistor T3, the first pole, the second pole and the grid of third transistor T3 is respectively as the first of switch unit 100
End, second end and control terminal.The working sequence of pixel circuit shown in Fig. 2 is equally applicable to pixel circuit described in Fig. 3, for it
Specific work process, details are not described herein.
Fig. 4 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention.Optionally, the pixel circuit packet
Include the first transistor T1, second transistor T2, third transistor T3, the 4th transistor T4, the 5th transistor T5, the 6th transistor
T6, the 7th transistor T7 and organic luminescent device D1；
The grid of the first transistor T1 is electrically connected with the second scanning signal input terminal Sn2 of pixel circuit, the first transistor
The first pole of T1 is electrically connected with the data signal input Data of pixel circuit, and the second pole of the first transistor T1 is brilliant with second
The first pole of body pipe T2 is electrically connected；
Wherein third transistor T3 is as switch unit, the grid of third transistor T3 and charging neutrality control signal input
SW1 electrical connection is held, the first pole of third transistor T3 is electrically connected with the first pole of organic luminescent device D1, third transistor T3's
Second pole is electrically connected with the second pole of organic luminescent device；The grid of 4th transistor T4 and the third of pixel circuit scan and believe
Number input terminal Sn3 electrical connection, the first pole of the 4th transistor T4 are electrically connected with the grid of second transistor T2, the 4th transistor T4
The second pole be electrically connected with the reference voltage signal input terminal Vref of pixel circuit；
The grid of 5th transistor T5 is electrically connected with the second scanning signal input terminal Sn2, the first pole of the 5th transistor T5
It is electrically connected with the grid of second transistor T2, the second pole of the 5th transistor T5 is electrically connected with the second pole of second transistor T2；
The first pole of first capacitor C1 is electrically connected with the first level signal input terminal ELVDD of pixel circuit, first capacitor
The second pole of C1 is electrically connected with the grid of second transistor T2；
The grid of 6th transistor T6 is electrically connected with the LED control signal input terminal of pixel circuit, the 6th transistor T6's
First pole is electrically connected with the first level input, and the second pole of the 6th transistor T6 is electrically connected with the first pole of second transistor T2
It connects；
The grid of 7th transistor T7 is electrically connected with the LED control signal input terminal of pixel circuit, the 7th transistor T7's
First pole is electrically connected with the second pole of second transistor T2, the second pole of the 7th transistor T7 and the first of organic luminescent device D1
Pole electrical connection, the second pole of organic luminescent device D1 is electrically connected with the second electrical level signal input part ELVEE of pixel circuit.
Fig. 5 is a kind of working timing figure of pixel circuit provided in an embodiment of the present invention, which is applicable to Fig. 4
Shown in pixel circuit.The working sequence of pixel circuit shown in Fig. 5 includes reseting stage t01, write-in compensated stage t02 and shines
Stage t03.Each transistor shown in Fig. 4 in pixel circuit illustrates for being P transistor npn npn below.
With continued reference to Fig. 4 and Fig. 5, in reseting stage t01, third scanning signal input terminal Sn3 input low level signal should
Low level signal is transmitted to the grid of the 4th transistor T4, and the 4th transistor T4 is connected, the ginseng of reference voltage input terminal input
It examines voltage and the control terminal of second transistor T2 and the second pole of first capacitor C1 is written by the 4th transistor T4, to the second crystal
The grid of pipe T1 and the second pole first capacitor C1 are resetted；The control terminal input low level signal of switch unit 100, switch are single
It is connected between the first end and second end of member 100, so that being formed in charge between the first pole organic luminescent device D1 and the second pole
And circuit, make the hole and luminescent layer and electricity in the luminescent layer of organic luminescent device D1 and the aggregation of hole transmission layer interface
The electronics of sub- transport layer interface aggregation is neutralized in time along circuit is neutralized.
Compensated stage t02, third scanning signal input terminal Sn3 input high level signal is written, the 4th transistor T4 ends,
Second scanning signal input terminal Sn2 input low level signal, the first transistor T1, the 5th transistor T5 conducting, data-signal are defeated
The data voltage for entering to hold Data to input is written to the second crystalline substance by the first transistor T1, second transistor T2 and the 5th transistor T5
The grid of body pipe T2 increases between the grid voltage of second transistor T2, when the grid voltage of second transistor T2 reaches
Vdata- | Vth | (Vdata is the data voltage of data signal input Data, and Vth is the threshold voltage for driving transistor T0),
Second transistor T2 cut-off, completes write-in and the threshold voltage compensation of data voltage.In write-in compensated stage, third transistor T3
Grid input input low level signal, third transistor pipe T3 conducting so that the first pole organic luminescent device D1 and the second pole
Between formed charging neutrality circuit, make organic luminescent device D1 luminescent layer and hole transmission layer interface aggregation hole,
And the electronics that luminescent layer is assembled with electron transfer layer interface is neutralized in time along circuit is neutralized.
Light emitting phase t03, to luminous signal input terminal input low level signal, the 6th transistor T6 and the 7th transistor T7
Conducting, second transistor T2 generate driving current, and driving organic luminescent device D1 shines；It is inputted to the grid of third transistor T3
High level signal, third transistor shutdown.
Pixel circuit provided in this embodiment, by reseting stage and write-in control terminal of the compensated stage to switch unit
First control signal is inputted, makes to be connected between the first end and second end of switch unit, so that organic luminescent device first
Pole and the formation of the second pole neutralize circuit, and the electrons and holes of the interface organic luminescent device D1 accumulation are by neutralizing in the progress of circuit
With, and then the built in field that is formed in organic luminescent device luminescent layer two sides of electrons and holes is eliminated, so that hole and electronics
Movement not will receive the obstruction of built in field, improve the luminous efficiency of organic luminescent device；And reduce luminescent layer organic light emission
The polarity of material extends the service life of organic luminescent device.Also, when pixel circuit provided in this embodiment and its work
Sequence, realizing keeps the electric current of light emitting diode unrelated with the driving threshold voltage of transistor, therefore can efficiently solve transistor
The uneven problem of display caused by threshold voltage shift.
Fig. 6 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention, with reference to Fig. 6, optionally, the picture
Plain circuit further includes the 8th transistor T8；The grid of 8th transistor T8 is electrically connected with third scanning signal input terminal Sn3, and the 4th
The first pole of transistor T4 is electrically connected by the 8th transistor T8 with the grid of second transistor T2, and the first of the 8th transistor T8
Pole is electrically connected with the grid of second transistor T2, and the second pole of the 8th transistor T8 and the first pole of the 4th transistor T4 are electrically connected
It connects.
With continued reference to Fig. 6, optionally, which further includes the 9th transistor T9；The grid of 9th transistor T9 with
Second pole of the second scanning signal input terminal Sn2 electrical connection, the 5th transistor T5 passes through the 9th transistor T9 and second transistor
The second pole of T2 is electrically connected, and the first pole of the 9th transistor T9 is electrically connected with the second pole of the 5th transistor T5, the 9th transistor
The second pole of T9 is electrically connected with the second pole of second transistor T2.The working sequence of pixel circuit shown in Fig. 5 is equally applicable to Fig. 6
Shown in pixel circuit, details are not described herein.Pixel circuit provided in this embodiment makes the by increasing by the 8th transistor T8
Four transistor T4 as double-gate structure come using, by increase the 9th transistor T9 make the 5th transistor T5 as double-gate structure
It uses, can reduce the leakage current in pixel circuit.
Fig. 7 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention.It is optional with reference to Fig. 7, it should
Pixel circuit includes the first transistor T1, second transistor T2, third transistor T3, the tenth transistor T10, the 11st transistor
T11 and organic luminescent device D1；Third transistor T3 is as switch unit；
The grid of the first transistor T1 is electrically connected with the 4th scanning signal input terminal Sn4 of pixel circuit, the first transistor
The first pole of T1 is electrically connected with the data signal input Data of pixel circuit, the second pole of the first transistor T1 and the first electricity
Hold the first pole electrical connection of C1, the second pole of first capacitor C1 is electrically connected with the grid of second transistor T2；
The first pole of second transistor T2 is electrically connected with the first level signal input terminal ELVDD of pixel circuit, and second is brilliant
The second pole of body pipe T2 is electrically connected with the first pole of the 11st transistor T11；
The grid of tenth transistor T10 is electrically connected with the 5th scanning signal input terminal Sn5 of pixel circuit, the tenth transistor
The first pole of T10 is electrically connected with the grid of second transistor T2, the second pole of the tenth transistor T10 and the 11st transistor T11
The first pole electrical connection；
The grid of 11st transistor T11 is electrically connected with the 6th scanning signal input terminal Sn6 of pixel circuit, and the 11st is brilliant
The first pole of body pipe T11 is electrically connected with the second pole of second transistor T2, the second pole and the second pole of the 11st transistor T11
It is electrically connected with the first pole of organic luminescent device D1, the second pole of organic luminescent device D1 and the second electrical level of pixel circuit are believed
Number input terminal ELVEE electrical connection；
The grid of third transistor T3 is electrically connected with the charging neutrality control signal input SW1 of pixel circuit, and third is brilliant
The first pole of body pipe T3 is electrically connected with the first pole of organic luminescent device D1, the second pole of third transistor T3 and organic illuminator
The second pole of part D1 is electrically connected.
Pixel-driving circuit provided in this embodiment only needs to be arranged five transistors and a capacitor, and the first transistor is made
For the switch of data write-in, the tenth transistor is as threshold voltage compensation transistor, and the 11st transistor is as the organic hair of control
The luminous transistor of optical element, for second transistor as driving transistor, first capacitor device is storage capacitance, transistor and capacitor
Use number it is all less, simplify image element circuit structure, be conducive to improve display device pixel density.
Fig. 8 is a kind of working timing figure of pixel circuit provided in an embodiment of the present invention, which is suitable for Fig. 7 institute
The pixel circuit shown, the working sequence of the pixel circuit include initial phase t10, data write phase t20 and light emitting phase
t30.With reference to Fig. 7 and Fig. 8, below with the first transistor T1, second transistor T2, third transistor T3, the tenth transistor T10 and
11st transistor T11 is to illustrate for P-type transistor.
Low electricity is inputted in initial phase t10, the 4th scanning signal input terminal Sn4 and the 5th scanning signal input terminal Sn5
Ordinary mail number, the 6th scanning signal input terminal Sn6 input high level signal, the first transistor T1 and the tenth transistor T10 conducting, it is complete
The initialization of pixel circuit and the compensation of second transistor T2 threshold voltage；The grid input low level of third transistor T3
Signal, third transistor T3 conducting make so that forming charging neutrality circuit between the first pole organic luminescent device D1 and the second pole
Hole and luminescent layer and electron-transport stratum boundary in the luminescent layer of organic luminescent device D1 and the aggregation of hole transmission layer interface
The electronics assembled at face is neutralized in time along circuit is neutralized.
Data write phase t20, the 4th scanning signal input terminal Sn4 input low level signal, the input of the 5th scanning signal
Hold Sn5 and the 6th scanning signal input terminal Sn6 input high level signal, the first transistor T1 conducting, data signal input
The data voltage of Data input is written to the first pole of first capacitor C1 by the first transistor T1 be connected, completes data-signal
Write-in；The grid input low level signal of third transistor T3, third transistor T3 conducting, so that organic luminescent device D1 the
Charging neutrality circuit is formed between one pole and the second pole, makes luminescent layer and hole transmission layer interface in organic luminescent device D1
The electronics that the hole of aggregation and luminescent layer are assembled with electron transfer layer interface is neutralized in time along circuit is neutralized.
Light emitting phase t30, the 4th scanning signal input terminal Sn4 and the 5th scanning signal input terminal Sn5 input high level letter
Number, the 6th scanning signal input terminal Sn6 input high level signal, the 11st transistor T11 conducting, second transistor T2, which drives, to be had
Machine luminescent device D1 shines；To the grid input high level signal of third transistor T3, third transistor T3 shutdown.
Pixel circuit and its driver' s timing provided in this embodiment, by initial phase and data write phase to opening
The control terminal for closing unit inputs first control signal, makes to be connected between the first end and second end of switch unit, so that having
The first pole of machine luminescent device and the second pole, which are formed, neutralizes circuit, and the electrons and holes of the interface organic luminescent device D1 accumulation are logical
It crosses neutralization circuit to be neutralized, and then eliminates the built in field that electrons and holes are formed in organic luminescent device luminescent layer two sides,
So that the movement of hole and electronics not will receive the obstruction of built in field, the luminous efficiency of organic luminescent device is improved；And it drops
The polarity of low luminescent layer luminous organic material, extends the service life of organic luminescent device.Also, picture provided in this embodiment
Plain circuit and its working sequence, realizing keeps the electric current of light emitting diode unrelated with the driving threshold voltage of transistor, therefore can
Efficiently solve the problems, such as that display caused by transistor threshold voltage drift is uneven.
It is said it should be noted that Fig. 4, Fig. 6, Fig. 7 have carried out signal row so that switch unit is third transistor T3 as an example
Bright, the embodiment of the present invention is not specifically limited switch unit, as long as being able to achieve the first pole of organic luminescent device and second
It is switched on or off between pole.
The embodiment of the invention also provides a kind of display panel, which may include that any implementation of the invention provides
Pixel circuit.Fig. 9 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention.With reference to Fig. 1 and Fig. 9, the display
Panel includes data-signal control driving unit 110, scan control driving unit 120 and charging neutrality control driving unit
130.Wherein, data-signal driving unit 110 passes through multiple data lines D1, the data-signal of D2, D3, D4 ... and pixel circuit
Input terminal Data electrical connection, is used for data signal input Data input data signal；Scanning signal driving unit 120 passes through
Multi-strip scanning line S1, S2, S3, S4 ... are connect with the first scanning signal input terminal Sn1 of pixel circuit respectively, for the
The scan signal end input terminal Sn1 provides scanning signal；Charging neutrality controls driving unit 130 and passes through a plurality of signal wire P1, P2,
P3, P4 ... are connect with the control terminal of switch unit 100, for providing charging neutrality control to the input terminal of switch unit 100
Signal.
Figure 10 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention.With reference to Figure 10, the display panel
Including data-signal control driving unit 210, scan control driving unit 220 and charging neutrality control driving unit 230 and hair
Photocontrol driving unit 240.Wherein, data-signal driving unit 210 passes through multiple data lines D1, D2, D3, D4 ... and pixel
The data signal input Data of circuit is electrically connected, and is used for data signal input Data input data signal；Scanning signal
Driving unit 220 by multi-strip scanning line S1, S2, S3, S4 ... respectively with the second scanning signal input terminal Sn2 of pixel circuit
It connects, is used for the second scanning signal end input terminal Sn2 and third scanning signal input terminal with third scanning signal input terminal Sn3
Sn3 provides scanning signal；Charging neutrality controls driving unit 230 by a plurality of signal wire P1, and P2, P3, P4 ... are single with switch
The control terminal connection of member controls signal for providing charging neutrality to the input terminal of switch unit.Luminous signal driving unit 240
By a plurality of control signal wire E1, E2, E3, E4 ... and the LED control signal input terminal of pixel circuit are used for light emitting control
Signal input part inputs LED control signal.
Figure 11 is a kind of flow chart of the driving method of pixel circuit provided in an embodiment of the present invention.The drive of the pixel circuit
Dynamic method can be used for driving Fig. 1 and pixel circuit shown in Fig. 3, with reference to Figure 11 and Fig. 1, in the driving method, and charging neutrality control
The signal of signal input part SW1 input processed can control driving unit 130 by the charging neutrality in above-mentioned display panel and provide；The
The signal of scan signal input terminal Sn1 input can be provided by scan control driving unit 120 in above-mentioned display panel；It shines
The signal of control signal input En input can be provided by the light emitting control driving unit in above-mentioned display panel, pixel electricity
The driving method on road includes:
S110, data write phase input scanning signal to the grid of the first transistor T1, and data voltage passes through conducting
The grid of second transistor T2 and the first pole of first capacitor C1 is written in the first transistor T1, to the control terminal of switch unit 100
First control signal is inputted, is connected between the first end and second end of switch unit 100；
S120, light emitting phase, second transistor T2 generates driving current driving organic luminescent device D1 and shines, single to switch
The control terminal of member 100 inputs second control signal, turns off between the first end and second end of switch unit 100.
The driving method of pixel circuit provided in this embodiment, by data write phase to switch unit, control
End input first control signal, makes to be connected between the first end and second end of switch unit, so that organic luminescent device the
One pole and the second pole, which are formed, neutralizes circuit, so that movement when organic luminescent device shines due to hole and electronics to luminescent layer,
Luminescent layer two sides interface accumulation electrons and holes pass through in and circuit carry out in and, and then eliminate electrons and holes having
The built in field that machine luminescent device luminescent layer two sides are formed, so that the movement of hole and electronics not will receive the resistance of built in field
Hinder, improves the luminous efficiency of organic luminescent device；And the polarity of luminescent layer luminous organic material is reduced, organic light emission is extended
The service life of device.
Figure 12 is the flow chart of the driving method of another pixel circuit provided in an embodiment of the present invention.The pixel circuit
Driving method can be used for driving Fig. 4 or pixel circuit shown in fig. 6, with reference to Figure 12 and Fig. 4, in the driving method, and charging neutrality
The signal of control signal input SW1 input can control driving unit by the charging neutrality in above-mentioned display panel and provide；The
The signal of two scanning signal input terminal Sn2 and third scanning signal input terminal Sn3 input can be by scanning in above-mentioned display panel
Driving unit is controlled to provide；The signal of LED control signal input terminal En input can be by the light emitting control in above-mentioned display panel
Driving unit provides, and the driving method of the pixel circuit includes:
S210, reseting stage input first control signal to third scanning signal input terminal Sn3, and the 4th transistor T4 is led
Logical, the control terminal of second transistor T2 is written by the 4th transistor T4 for the reference voltage of reference voltage input terminal input；Xiang Kai
The control terminal for closing unit 100 inputs first control signal, is connected between the first end and second end of switch unit 100；
S220, write-in compensated stage, input second control signal to third scanning signal input terminal Sn3, to the second scanning
Signal input part Sn2 inputs first control signal, the first transistor T1, the 5th transistor T5 conducting, data signal input
The data voltage of Data input is written to the second crystal by the first transistor T1, second transistor T2 and the 5th transistor T5
When the voltage difference of the grid of pipe T2, the grid of second transistor T2 and the first pole is equal to its threshold voltage, second transistor T2 is cut
Only；First control signal is inputted to the control terminal of switch unit 100, is connected between the first end and second end of switch unit 100；
S230, light emitting phase input first control signal, the 6th transistor T6 and the 7th crystal to luminous signal input terminal
Pipe T7 conducting, second transistor T2 drive organic luminescent device D1 to shine；To the second control of the control terminal of switch unit 100 input
Signal processed turns off between the first end and second end of switch unit 100.
The driving method of pixel circuit provided in this embodiment, by single to switch in reseting stage and write-in compensated stage
The control terminal of member inputs first control signal, makes to be connected between the first end and second end of switch unit, so that organic hair
The first pole of optical device and the second pole, which are formed, neutralizes circuit, and the electrons and holes of organic luminescent device interface accumulation are by neutralizing back
Road is neutralized, and then eliminates the built in field that electrons and holes are formed in organic luminescent device luminescent layer two sides, so that hole
The obstruction that not will receive built in field with the movement of electronics, improves the luminous efficiency of organic luminescent device；And reduce luminescent layer
The polarity of luminous organic material, extend organic luminescent device, service life.Also, pixel circuit provided in this embodiment
Driving method, realizing keeps the electric current of light emitting diode unrelated with the driving threshold voltage of transistor, therefore can effectively solve
The uneven problem of display caused by transistor threshold voltage drift.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of pixel circuit, which is characterized in that including the first transistor, the second brilliant pole pipe, switch unit, first capacitor and have
Machine luminescent device；
The first transistor is used to be written data voltage the grid of the second transistor；
The second transistor is used to provide driving current to the organic luminescent device, and the organic luminescent device is driven to send out
Light；
The first capacitor is used to keep the voltage of the grid of the second transistor in light emitting phase；
The switch unit includes first end, second end and control terminal；The first end of the switch unit and the organic light emission
First pole of device is electrically connected, and the second end of the switch unit is electrically connected with the second pole of the organic luminescent device, described
The control signal that switch unit is used to be inputted according to its control terminal will be connected or be turned off between first end and second end.
2. pixel circuit according to claim 1, which is characterized in that the switch unit includes third transistor, described
First end, second end and control terminal of the first pole, the second pole and the grid of third transistor respectively as the switch unit.
3. pixel circuit according to claim 1 or 2, which is characterized in that the grid of the first transistor and the picture
First scanning signal input terminal of plain circuit is electrically connected, and the first pole of the first transistor and the data of the pixel circuit are believed
The electrical connection of number input terminal, the second pole of the first transistor is electrically connected with the grid of the second transistor；
First pole of the second transistor is electrically connected with the first level signal input terminal of the pixel circuit, and described second is brilliant
Second pole of body pipe is connect with the first pole of the organic luminescent device, the second pole of the organic luminescent device and the pixel
The second electrical level signal input part of circuit is electrically connected, and the first pole of the first capacitor and the grid of the second transistor are electrically connected
It connects, the second pole of the first capacitor is electrically connected with the first pole of the second transistor.
4. pixel circuit according to claim 1 or 2, which is characterized in that further include the 4th transistor, the 5th transistor,
6th transistor, the 7th transistor；The control terminal of the switch unit and the charging neutrality control signal of the pixel circuit are defeated
Enter end electrical connection；
The grid of the first transistor is electrically connected with the second scanning signal input terminal of the pixel circuit, the first crystal
First pole of pipe is electrically connected with the data signal input of the pixel circuit, the second pole of the first transistor and described the
First pole of two-transistor is electrically connected；
The grid of 4th transistor is electrically connected with the third scanning signal input terminal of the pixel circuit, the 4th crystal
First pole of pipe is electrically connected with the grid of the second transistor, the second pole and the pixel circuit of the 4th transistor
The electrical connection of reference voltage signal input terminal；
The grid of 5th transistor is electrically connected with the second scanning signal input terminal, the first pole of the 5th transistor
It is electrically connected with the grid of the second transistor, the second of the second pole of the 5th transistor and the second transistor is extremely electric
Connection；
First pole of the first capacitor is electrically connected with the first level signal input terminal of the pixel circuit, the first capacitor
The second pole be electrically connected with the grid of the second transistor；
The grid of 6th transistor is electrically connected with the LED control signal input terminal of the pixel circuit, the 6th crystal
First pole of pipe is electrically connected with first level input, the second pole and the second transistor of the 6th transistor
The electrical connection of first pole；
The grid of 7th transistor is electrically connected with the LED control signal input terminal of the pixel circuit, the 7th transistor
First pole is electrically connected with the second pole of the second transistor, and the of the second pole of the 7th transistor and the organic luminescent device
The electrical connection of one pole, the second pole of the organic luminescent device is electrically connected with the second electrical level signal input part of the pixel circuit.
5. pixel circuit according to claim 4, which is characterized in that further include the 8th transistor；8th transistor
Grid be electrically connected with the third scanning signal input terminal, the first pole of the 4th transistor passes through the 8th transistor
It is electrically connected with the grid of the second transistor, the first pole of the 8th transistor and the grid of the second transistor are electrically connected
It connects, the second pole of the 8th transistor is electrically connected with the first pole of the 4th transistor.
6. pixel circuit according to claim 5, which is characterized in that further include the 9th transistor；9th transistor
Grid be electrically connected with the second scanning signal input terminal, the second pole of the 5th transistor passes through the 9th transistor
It is electrically connected with the second pole of the second transistor, the first pole of the 9th transistor and the second pole of the 5th transistor
Electrical connection, the second pole of the 9th transistor is electrically connected with the second pole of the second transistor.
7. pixel circuit according to claim 1 or 2, which is characterized in that further include the tenth transistor, the 11st crystal
Pipe；
The grid of the first transistor is electrically connected with the 4th scanning signal input terminal of the pixel circuit, the first crystal
First pole of pipe is electrically connected with the data signal input of the pixel circuit, the second pole of the first transistor and described the
First pole of one capacitor is electrically connected, and the second pole of the first capacitor is electrically connected with the grid of the second transistor；
First pole of the second transistor is electrically connected with the first level signal input terminal of the pixel circuit, and described second is brilliant
Second pole of body pipe is electrically connected with the first pole of the 11st transistor；
The grid of tenth transistor is electrically connected with the 5th scanning signal input terminal of the pixel circuit, the tenth crystal
First pole of pipe is electrically connected with the grid of the second transistor, the second pole of the tenth transistor and the 11st crystal
First pole of pipe is electrically connected；
The grid of 11st transistor is electrically connected with the 6th scanning signal input terminal of the pixel circuit, and the described 11st
First pole of transistor is electrically connected with the second pole of the second transistor, the second pole of the 11st transistor and described the
Two poles are electrically connected with the first pole of the organic luminescent device, the second pole and the pixel circuit of the organic luminescent device
The electrical connection of second electrical level signal input part.
8. a kind of display panel, including the described in any item pixel circuits of claim 1-7.
9. a kind of driving method of pixel circuit, which is characterized in that the pixel circuit includes the first transistor, the second brilliant pole
Pipe, switch unit, first capacitor and organic luminescent device；
The switch unit includes first end, second end and control terminal；The first end of the switch unit and the organic light emission
First pole of device is electrically connected, and the first end of the switch unit is electrically connected with the second pole of the organic luminescent device；
The driving method includes:
Data write phase, the grid of Xiang Suoshu the first transistor input scanning signal, data voltage pass through conducting described the
The grid of the second transistor and the first pole of the first capacitor, the control terminal of Xiang Suoshu switch unit is written in one transistor
First control signal is inputted, is connected between the first end and second end of the switch unit；
Light emitting phase, the second transistor generates driving current and the organic luminescent device is driven to shine, single to the switch
The control terminal of member inputs second control signal, turns off between the first end and second end of the switch unit.
10. the driving method of pixel circuit according to claim 9, which is characterized in that the pixel circuit further includes
Four transistors, the 5th transistor, the 6th transistor, the 7th transistor；The control terminal of the switch unit and the pixel circuit
Charging neutrality control signal input electrical connection；
The grid of the first transistor is electrically connected with the second scanning signal input terminal of the pixel circuit, the first crystal
First pole of pipe is electrically connected with the data signal input of the pixel circuit, the second pole of the first transistor and described the
First pole of two-transistor is electrically connected；
The grid of 4th transistor is electrically connected with the third scanning signal input terminal of the pixel circuit, the 4th crystal
First pole of pipe is electrically connected with the grid of the second transistor, the second pole and the pixel circuit of the 4th transistor
The electrical connection of reference voltage signal input terminal；
The grid of 5th transistor is electrically connected with the second scanning signal input terminal, the first pole of the 5th transistor
It is electrically connected with the grid of the second transistor, the second of the second pole of the 5th transistor and the second transistor is extremely electric
Connection；
First pole of the first capacitor is electrically connected with the first level signal input terminal of the pixel circuit, the first capacitor
The second pole be electrically connected with the grid of the second transistor；
The grid of 6th transistor is electrically connected with the LED control signal input terminal of the pixel circuit, the 6th crystal
First pole of pipe is electrically connected with first level input, the second pole and the second transistor of the 6th transistor
The electrical connection of first pole；
The grid of 7th transistor is electrically connected with the LED control signal input terminal of the pixel circuit, the 7th transistor
First pole is electrically connected with the second pole of the second transistor, and the of the second pole of the 7th transistor and the organic luminescent device
The electrical connection of one pole, the second pole of the organic luminescent device is electrically connected with the second electrical level signal input part of the pixel circuit；
The driving method includes:
Reseting stage, Xiang Suoshu third scanning signal input terminal input first control signal, and the 4th transistor turns are described
The control terminal of the second transistor is written by the 4th transistor for the reference voltage of reference voltage input terminal input；To institute
The control terminal input first control signal of switch unit is stated, is connected between the first end and second end of the switch unit；
Compensated stage is written, Xiang Suoshu third scanning signal input terminal inputs second control signal, the second scanning signal of Xiang Suoshu
Input terminal input first control signal, the first transistor, the 5th transistor turns, the data signal input are defeated
The data voltage entered is written to the grid of the second transistor by the first transistor, second transistor and the 5th transistor
When the voltage difference of pole, the grid of the second transistor and the first pole is equal to its threshold voltage, the second transistor cut-off；To
The control terminal of the switch unit inputs first control signal, is connected between the first end and second end of the switch unit
Light emitting phase, Xiang Suoshu luminous signal input terminal input first control signal, the 6th transistor and the 7th transistor
Conducting, the second transistor drive the organic luminescent device to shine；To the second control of the control terminal of switch unit input
Signal processed turns off between the first end and second end of the switch unit.
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| CN109872676A (en) * | 2019-04-22 | 2019-06-11 | 云谷（固安）科技有限公司 | A kind of digital drive pixel circuit and display device |
| CN110189708A (en) * | 2019-06-26 | 2019-08-30 | 云谷（固安）科技有限公司 | Pixel-driving circuit and display device |
| WO2023115665A1 (en) * | 2021-12-23 | 2023-06-29 | 深圳市华星光电半导体显示技术有限公司 | Light-emitting device driving circuit, and display panel |
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