CN109584786A - A kind of driving circuit of display panel, driving method and display device - Google Patents
A kind of driving circuit of display panel, driving method and display device Download PDFInfo
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- CN109584786A CN109584786A CN201910055157.7A CN201910055157A CN109584786A CN 109584786 A CN109584786 A CN 109584786A CN 201910055157 A CN201910055157 A CN 201910055157A CN 109584786 A CN109584786 A CN 109584786A
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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]
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
The application belongs to field of display technology, provide a kind of driving circuit of display panel, driving method and display device, first switch unit receives the first scanning signal that the first scan line provides, second switch unit receives the second scanning signal that the second scan line provides, the power supply signal that third switch unit receives the third scanning signal that third scan line provides and power supply line provides, pass through the on or off for the data voltage signal that control data line provides, to charge to first capacitor unit and the second capacitor cell, so that the electric current for flowing through luminescence unit is not driven the influence of the threshold voltage of unit, it avoids luminescence unit and the uneven problem of display occurs.
Description
Technical field
The embodiment of the present application belongs to field of display technology more particularly to a kind of driving circuit of display panel, driving method
And display device.
Background technique
With the continuous development of display technology, liquid crystal display panel, display etc. show equipment constantly towards high-resolution, large-size screen monitors
Change, low-power consumption, low cost direction develop.Liquid crystal display panel includes the pixel unit embarked on journey He in column, in liquid crystal display panel work,
Gate drive signal controls the opening and closing of the thin film transistor (TFT) (Thin Film Transistor, TFT) in pixel unit,
To complete the row scanning of liquid crystal display panel, realize that liquid crystal display panel shows the function of image, in order to promote display effect, usually to aobvious
Show that panel is driven using active array LED drive circuit.
However, since thin film transistor (TFT) can be because of threshold voltage at prolonged gate stress (gate stress)
It drifts about and the electric current of thin film transistor (TFT) is drifted about, the uneven problem of display occur so as to cause micro- light emitting diode.
Apply for content
The embodiment of the present application provides the driving circuit, driving method and display device of a kind of display panel, it is intended to solve by
Under prolonged gate stress in thin film transistor (TFT) sends out the electric current of thin film transistor (TFT) because of the drift of threshold voltage
There is the uneven problem of display so as to cause micro- light emitting diode in raw drift.
The embodiment of the present application provides a kind of driving circuit of display panel, comprising:
The input terminal of first switch unit, the first switch unit is connect with data line, the first switch unit
Control terminal is connect with the first scan line, is set as controlling the data according to the first scanning signal that first scan line inputs
The turn-on and turn-off for the data voltage signal that line provides；
First capacitor unit, the first end of the first capacitor unit are connect with the output end of the first switch unit；
The first end of second capacitor cell, second capacitor cell is connect with power supply line, and the power supply line is set as mentioning
Power supply source signal；
Second switch unit, the input terminal of the second switch unit are connect with the second end of second capacitor cell,
The output end of the second switch unit is connect with the second end of the first capacitor unit, the control of the second switch unit
End is connect with the second scan line, and second scan line is set as providing the second scanning signal；
Third switch unit, the control terminal of the third switch unit are connect with the second end of second capacitor cell,
The input terminal of the third switch unit is connect with the power supply line, the output end of the third switch unit and first electricity
Hold the second end connection of unit；
Luminescence unit, the first end of the luminescence unit are connect with the output end of the third switch unit, described to shine
The second end of unit is connect with public electrode.
Optionally, the first switch unit, the second switch unit and the third switch unit are electronic cutting
Guan Guan.
Optionally, the electronic switching tube is N-type film crystal field-effect tube；
The drain electrode of the N-type film crystal field-effect tube is the input terminal of the electronic switching tube, the N-type film crystal
The source electrode of field-effect tube is the output end of the electronic switching tube, and the grid of the N-type film crystal field-effect tube is the electricity
The control terminal of sub switch pipe.
Optionally, the first capacitor unit includes first capacitor, and the first end of the first capacitor is as described first
The first end of capacitor cell, second end of the second end of the first capacitor as the first capacitor unit.
Optionally, second capacitor cell includes the second capacitor, and the first end of second capacitor is as described second
The first end of capacitor cell, second end of the second end of second capacitor as second capacitor cell.
Optionally, the luminescence unit includes micro- light emitting diode, and the anode of micro- light emitting diode is described shines
The first end of unit, the cathode of micro- light emitting diode are the second end of the luminescence unit.
Optionally, the electronic switching tube is polycrystalline SiTFT, amorphous silicon film transistor, Zinc oxide based film
Any one in transistor or Organic Thin Film Transistors.
The embodiment of the present application also provides a kind of driving method of any of the above-described driving circuit, the driving method packet
It includes:
In initial phase, high level is set by first scanning signal, sets second scanning signal to
Low level, sets high level for the power supply signal, sets the first data voltage for the data voltage signal；
In the threshold voltage compensation stage, high level is set by first scanning signal and second scanning signal,
High level is set by the power supply signal, sets the second data voltage for the data voltage signal；
In the charging stage, high level is set by first scanning signal and second scanning signal, by the electricity
Source signal is set as high level, sets third data voltage for the data voltage signal；
In light emitting phase, low level is set by first scanning signal and second scanning signal, by the electricity
Source signal is set as low level, sets the first data voltage for the data voltage signal.
Optionally, in the initial phase, the voltage of the power supply signal is less than the voltage of the public electrode.
Another embodiment of the application also provides a kind of display device, comprising:
Display panel；And
Control unit, wherein described control unit includes the driving circuit as described in any of the above-described embodiment.
The embodiment of the present application provides the driving circuit, driving method and display device of a kind of display panel, first switch
Unit receives the first scanning signal that the first scan line provides, and second switch unit receives the second scanning that the second scan line provides
Signal, the power supply signal that third switch unit receives the third scanning signal that third scan line provides and power supply line provides, passes through
The on or off for the data voltage signal that data line provides is controlled, to fill to first capacitor unit and the second capacitor cell
Electricity avoids luminescence unit appearance so that the electric current for flowing through luminescence unit is not driven the influence of the threshold voltage of unit
Show uneven problem.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the present application, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the structural schematic diagram of the driving circuit for the display panel that one embodiment of the application provides；
Fig. 2 is the structural schematic diagram of the driving circuit for the display panel that another embodiment of the application provides；
Fig. 3 is the flow diagram for the driving method that one embodiment of the application provides；
Fig. 4 is the driver' s timing schematic diagram for the driving method that the application one embodiment provides；
Fig. 5 is the structural schematic diagram for the display device that one embodiment of the application provides.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, technical solutions in the embodiments of the present application are explicitly described, it is clear that described embodiment is the application one
The embodiment divided, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present application.
The description and claims of this application and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " second " and
" third " etc. is arranged to distinguish different objects, rather than is set as description particular order.
Fig. 1 is the structural schematic diagram of the driving circuit for the display panel that one embodiment of the application provides.Such as Fig. 1 institute
Show, the driving circuit in the present embodiment includes:
The input terminal of first switch unit 10, the first switch unit 10 is connect with data line, the first switch list
The control terminal of member 10 is connect with the first scan line, is set as controlling institute according to the first scanning signal that first scan line inputs
The turn-on and turn-off of the data voltage signal of data line offer are provided；
First capacitor unit 101, the output of the first end of the first capacitor unit 101 and the first switch unit 10
End connection；
The first end of second capacitor cell 102, second capacitor cell 102 is connect with power supply line, and the power supply line is set
Offer power supply signal is provided；
The second of second switch unit 20, the input terminal of the second switch unit 20 and second capacitor cell 102
End connection, the output end of the second switch unit 20 are connect with the second end of the first capacitor unit 101, and described second opens
The control terminal for closing unit 20 is connect with the second scan line, and second scan line is set as providing the second scanning signal；
Third switch unit 30, the second end of the control terminal of the third switch unit 30 and second capacitor cell 20
Connection, the input terminal of the third switch unit 30 connect with the power supply line, the output end of the third switch unit 30 and
The second end of the first capacitor unit 101 connects；
Luminescence unit 103, the first end of the luminescence unit 103 are connect with the output end of the third switch unit 30,
The second end of the luminescence unit 103 is connect with public electrode.
In one embodiment, the first switch unit, the second switch unit and the third switch unit
For electronic switching tube.
In one embodiment, the electronic switching tube is N-type film crystal field-effect tube；
The drain electrode of the N-type film crystal field-effect tube is the input terminal of the electronic switching tube, the N-type film crystal
The source electrode of field-effect tube is the output end of the electronic switching tube, and the grid of the N-type film crystal field-effect tube is the electricity
The control terminal of sub switch pipe.
Fig. 2 is the structural schematic diagram of the driving circuit for the display panel that another embodiment of the application provides.
Referring to fig. 2, in one embodiment, the first capacitor unit 101 includes first capacitor C1, the first capacitor
First end of the first end of C1 as the first capacitor unit 101, the second end of the first capacitor C1 is as described first
The second end of capacitor cell 101.
In one embodiment, first capacitor unit 101 can also be the in series or in parallel of multiple capacitors, for example, more
First end of the first end of a concatenated capacitor as first capacitor unit 101, the second end of multiple concatenated capacitors is as
The second end of one capacitor cell 101.
Referring to fig. 2, in one embodiment, second capacitor cell 102 includes the second capacitor, the second capacitor C2
First end of the first end as second capacitor cell 102, the second end of the second capacitor C2 is as second electricity
Hold the second end of unit 102.
In one embodiment, the second capacitor cell 102 can also be the in series or in parallel of multiple capacitors, for example, more
First end of the first end of a concatenated capacitor as the second capacitor cell 102, the second end of multiple concatenated capacitors is as
The second end of two capacitor cells 102.
Referring to fig. 2, in one embodiment, the luminescence unit 103 includes micro- light emitting diode uLED, described micro- luminous
The anode of diode uLED is the first end of the luminescence unit 103, and the cathode of micro- light emitting diode uLED is the hair
The second end of light unit 103.
Referring to fig. 2, in one embodiment, first switch unit 10 includes first film transistor M1, and the first film is brilliant
The drain electrode of body pipe M1 is the input terminal of first switch unit 10, and the source electrode of first film transistor M1 is first switch unit 10
Output end, the grid of first film transistor M1 are the control terminal of first switch unit 10.
Referring to fig. 2, in one embodiment, second switch unit 20 includes the second thin film transistor (TFT) M2, and the second film is brilliant
The drain electrode of body pipe M2 is the input terminal of second switch unit 20, and the source electrode of the second thin film transistor (TFT) M2 is second switch unit 20
Output end, the grid of the second thin film transistor (TFT) M2 are the control terminal of second switch unit 20.
Referring to fig. 2, in one embodiment, third switch unit 30 includes third thin film transistor (TFT) M3, and third film is brilliant
The drain electrode of body pipe M3 is the input terminal of third switch unit 30, and the source electrode of third thin film transistor (TFT) M3 is third switch unit 30
Output end, the grid of third thin film transistor (TFT) M3 are the control terminal of third switch unit 30.
In one embodiment, the second end of first capacitor unit 101 is set as node n, the control of third switch unit 30
End processed is set as node m.
Referring to fig. 2, another embodiment of the application provides a kind of driving circuit of display panel, comprising:
First film transistor M1, the drain electrode of the first film transistor M1 are connect with data line, the first film
The grid of transistor M1 is connect with the first scan line, is set as the first scanning signal control inputted according to first scan line
The turn-on and turn-off for the data voltage signal that the data line provides；
First capacitor C1, the first end of the first capacitor C1 are connect with the source electrode of the first film transistor M1；
Second capacitor C2, the first end of the second capacitor C2 are connect with power supply line, and the power supply line is set as providing electricity
Source signal；
The drain electrode of second thin film transistor (TFT) M2, the second thin film transistor (TFT) M2 connects with the second end of the second capacitor C2
It connects, the source electrode of the second thin film transistor (TFT) M2 is connect with the second end of the first capacitor C1, second thin film transistor (TFT)
The grid of M2 is connect with the second scan line, and second scan line is set as providing the second scanning signal；
The second end of third thin film transistor (TFT) M3, the grid of the third thin film transistor (TFT) M3 and the second capacitor C2 connect
It connects, the drain electrode of the third thin film transistor (TFT) M3 is connect with the power supply line, the source electrode of the third thin film transistor (TFT) M3 and institute
State the second end connection of first capacitor C1；
The source of the anode and the third thin film transistor (TFT) M3 of micro- light emitting diode uLED, micro- light emitting diode uLED
Pole connection, the cathode of micro- light emitting diode uLED are connect with public electrode VSS.
In one embodiment, node n is set by the second end of first capacitor C1, by the grid of third thin film transistor (TFT) M3
Pole is set as m.
Fig. 3 is a kind of driving circuit of the display panel for any of the above-described embodiment that one embodiment of the application provides
Driving method flow diagram.
As shown in figure 3, the driving method in the present embodiment includes:
In initial phase, high level is set by first scanning signal, sets second scanning signal to
Low level, sets high level for the power supply signal, sets the first data voltage for the data voltage signal；
In the threshold voltage compensation stage, high level is set by first scanning signal and second scanning signal,
High level is set by the power supply signal, sets the second data voltage for the data voltage signal；
In the charging stage, high level is set by first scanning signal and second scanning signal, by the electricity
Source signal is set as high level, sets third data voltage for the data voltage signal；
In light emitting phase, low level is set by first scanning signal and second scanning signal, by the electricity
Source signal is set as low level, sets the first data voltage for the data voltage signal.
In one embodiment, in the initial phase, the voltage of the power supply signal is less than the public electrode
Voltage.
Fig. 4 is the driver' s timing schematic diagram for the driving method that the application one embodiment provides.
As shown in figure 4, entire driving process is divided into four-stage, including initial during the driving to driving circuit
Change stage T1, threshold voltage compensation stage T2, charging stage T3 and light emitting phase T4.
Specifically, frame time T=(T1+T2+T3+T4) t, t are the number of scan line, that is, frame picture scanning
Number, if scan frequency is 60HZ, a frame time T=1/60=16.7ms, if scan frequency is 120HZ, when a frame
Between T=1/120=8.33ms, for example, having 768 gate for high-res (High Definition, HD) 1366*768
Line, t=768, corresponding T1+T2+T3+T4=21.7 μ s (60HZ situation, or the corresponding scanning t=of 120HZ, 120HZ
10.85 μ s), for full HD (Full High Definition, FHD) resolution, t=1080, corresponding T1+T2+T3+T4
=15.4 μ s, for 4K resolution, i.e., 4096 × 2160 pixel resolution, t=2160, corresponding T1+T2+T3+T4=7.7
μs。
In one embodiment, a preset voltage signal is arranged in public electrode VSS, which is set as improving
The stability of driving circuit.
In one embodiment, public electrode VSS can be directly grounded.
In initial phase T1, Initialize installation is carried out, the first scanning signal Gate1 is set as high level VGH, and second sweeps
It retouches signal Gate2 and is set as low level VGL, power supply signal VDD is set as high level VDD_H, data voltage signal Vdata setting
For the first data voltage V0, at this point, first film transistor M1 is connected, the second thin film transistor (TFT) M2 ends, the voltage at node m
Vm is coupled by the second capacitor C2 and is promoted, and third thin film transistor (TFT) M3 can be opened, third thin film transistor (TFT) M3
It is connected after opening, at this point, the voltage at node n is discharged by third thin film transistor (TFT) M3, therefore, terminates in initial phase T1
When, the voltage Vn=VDD_H at node n, this moment, VDD_H < VSS+VTH_uLED, micro- light emitting diode uLED are closed, and VSS is
The voltage of public electrode is set as promoting the stability of driving circuit, the threshold value electricity that VTH_uLED is micro- light emitting diode uLED
Pressure.
High level VGH, power supply signal VDD setting are set as in threshold voltage compensation stage T2, the first scanning signal Gate1
High level VDD_H, the second scanning signal Gate2 are set as high level VGH, and the second thin film transistor (TFT) M2 is opened, at this point, data are electric
Pressure signal Vdata is set as the second data voltage Vc, wherein the second data voltage Vc is greater than the first data voltage V0.Second electricity
Hold C2 due to capacity coupled effect, the voltage of node m is raised, and in this stage, third thin film transistor (TFT) M3 work is being saturated
Area, power supply signal VDD charges to node m and node n before third thin film transistor (TFT) M3 is closed, at this point, node m and node
The voltage of n is VDD_H-Vth3, i.e. Vm=Vn=VDD_H-Vth3, wherein Vth3 is the threshold value electricity of third thin film transistor (TFT)
Pressure, the voltage Vn at node n is also not enough to open micro- light emitting diode uLED at this time.
High level VGH is set as in charging stage T3, the first scanning signal Gate1 and the second scanning signal Gate2, first
Thin film transistor (TFT) M1 and the second thin film transistor (TFT) M2 are in opening state, and power supply signal VDD is set as high level VDD_H, this
When, the data voltage signal Vdata that data line provides is set as third data voltage Vdata, carries out data write-in, the third number
It is greater than the second data voltage Vc according to voltage Vdata, is acted on according to Charged Couple, at this time the voltage of node m are as follows:
Before in the charging stage, T3 terminates, the voltage of node m is higher than the voltage of the node m in threshold voltage compensation stage T2,
Third thin film transistor (TFT) M3 is in saturation region, has the voltage Vm at node m at this point, power supply signal VDD carries out charging to node m
One voltage increment, at this point, the voltage of node m are as follows:
Wherein, VDD_H is the voltage of the high level of power supply signal VDD, and Vth3 is the threshold voltage of third thin film transistor (TFT),
Vdata is third data voltage, and it is one related to the mobility of third thin film transistor (TFT) that △ V, which is the voltage increment at node m,
Parameter.
It has completed to be written in light emitting phase T4, the data voltage signal Vdata that data line provides, micro- light emitting diode
Light-emission operation is carried out after uLED conducting, then flows through the electric current of micro- light emitting diode uLED are as follows:
Wherein, wherein Vdata is third data voltage, and Vc is the second data voltage, and k is that semiconductor layer mobility is related
A constant.K=uCoxW/L, u are the electron mobility of semiconductor layer, and Cox is that the metal of film transistor device is exhausted
The unit-area capacitance of edge semiconductor (metal-insulator-semiconductor, MIS) structure, W/L are TFT channel
Breadth length ratio.
By above formula it is found that third thin film transistor (TFT) M3 flows through micro- light emitting diode uLED's as driving switch pipe
Electric current IuLED is a data unrelated with the threshold voltage of third thin film transistor (TFT), at this point, the threshold voltage of driving switch pipe
It drifts about to the driving current IuLED of micro- light emitting diode uLED without larger impact, so as to obtain the display image of high quality.
Fig. 5 is the structural schematic diagram for the display device that one embodiment of the application provides.
As shown in figure 5, the display device 60 in the present embodiment, comprising:
Display panel 60；And
Control unit 61, wherein control unit 61 includes the driving circuit 610 such as any of the above-described.
In one embodiment, display device 60 can be to be provided with any type of display of above-mentioned driving circuit 610
Device, such as liquid crystal display device (Liquid Crystal Display, LCD), Organic Electricity laser display (Organic
Electroluminesence Display, OLED) display device, light emitting diode with quantum dots (Quantum Dot Light
Emitting Diodes, QLED) display device or curved-surface display device etc..
In one embodiment, display panel 62 includes the pixel array being made of multirow pixel and multiple row pixel.
In one embodiment, control unit 61 can pass through universal integrated circuit, such as central processing unit (Central
Processing Unit, CPU), or pass through specific integrated circuit (Application Specific Integrated
Circuit, ASIC) Lai Shixian.
The embodiment of the present application provides the driving circuit, driving method and display device of a kind of display panel, first switch
Unit receives the first scanning signal that the first scan line provides, and second switch unit receives the second scanning that the second scan line provides
Signal, the power supply signal that third switch unit receives the third scanning signal that third scan line provides and power supply line provides, passes through
The on or off for the data voltage signal that data line provides is controlled, to fill to first capacitor unit and the second capacitor cell
Electricity avoids luminescence unit appearance so that the electric current for flowing through luminescence unit is not driven the influence of the threshold voltage of unit
Show uneven problem.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The foregoing is merely the optional embodiments of the application, all the application's not to limit the application
Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within spirit and principle.
Claims (10)
1. a kind of driving circuit of display panel characterized by comprising
The input terminal of first switch unit, the first switch unit is connect with data line, the control of the first switch unit
End is connect with the first scan line, is set as the first scanning signal inputted according to first scan line the control data line and is mentioned
The turn-on and turn-off of the data voltage signal of confession；
First capacitor unit, the first end of the first capacitor unit are connect with the output end of the first switch unit；
The first end of second capacitor cell, second capacitor cell is connect with power supply line, and the power supply line is set as providing electricity
Source signal；
Second switch unit, the input terminal of the second switch unit is connect with the second end of second capacitor cell, described
The output end of second switch unit is connect with the second end of the first capacitor unit, the control terminal of the second switch unit with
The connection of second scan line, second scan line are set as providing the second scanning signal；
Third switch unit, the control terminal of the third switch unit is connect with the second end of second capacitor cell, described
The input terminal of third switch unit is connect with the power supply line, the output end of the third switch unit and the first capacitor list
The second end connection of member；
Luminescence unit, the first end of the luminescence unit are connect with the output end of the third switch unit, the luminescence unit
Second end connect with public electrode.
2. the driving circuit of display panel as described in claim 1, which is characterized in that the first switch unit, described
Two switch units and the third switch unit are electronic switching tube.
3. the driving circuit of display panel as claimed in claim 2, which is characterized in that the electronic switching tube is N-type film
Crystal field effects pipe；
The drain electrode of the N-type film crystal field-effect tube is the input terminal of the electronic switching tube, N-type film crystal field effect
Should pipe source electrode be the electronic switching tube output end, the grid of the N-type film crystal field-effect tube is the electronic cutting
Close the control terminal of pipe.
4. the driving circuit of display panel as described in claim 1, which is characterized in that the first capacitor unit includes first
The second end of capacitor, first end of the first end of the first capacitor as the first capacitor unit, the first capacitor is made
For the second end of the first capacitor unit.
5. the driving circuit of display panel as described in claim 1, which is characterized in that second capacitor cell includes second
The second end of capacitor, first end of the first end of second capacitor as second capacitor cell, second capacitor is made
For the second end of second capacitor cell.
6. the driving circuit of display panel as described in claim 1, which is characterized in that the luminescence unit includes micro- luminous two
Pole pipe, the anode of micro- light emitting diode are the first end of the luminescence unit, and the cathode of micro- light emitting diode is institute
State the second end of luminescence unit.
7. the driving circuit of display panel as claimed in claim 2, which is characterized in that the electronic switching tube is that polysilicon is thin
Any one in film transistor, amorphous silicon film transistor, Zinc oxide based film transistor or Organic Thin Film Transistors.
8. a kind of driving method of such as driving circuit of any of claims 1-7, which is characterized in that the method packet
It includes:
In initial phase, high level is set by first scanning signal, sets low electricity for second scanning signal
It is flat, high level is set by the power supply signal, sets the first data voltage for the data voltage signal；
In the threshold voltage compensation stage, high level is set by first scanning signal and second scanning signal, by institute
It states power supply signal and is set as high level, set the second data voltage for the data voltage signal；
In the charging stage, high level is set by first scanning signal and second scanning signal, the power supply is believed
Number it is set as high level, sets third data voltage for the data voltage signal；
In light emitting phase, low level is set by first scanning signal and second scanning signal, the power supply is believed
Number it is set as low level, sets the first data voltage for the data voltage signal.
9. driving method as claimed in claim 8, which is characterized in that in the initial phase, the electricity of the power supply signal
Pressure is less than the voltage of the public electrode.
10. a kind of display device characterized by comprising
Display panel；And
Control unit, wherein described control unit includes driving circuit as described in any one of claims 1 to 7.
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| CN201910055157.7A CN109584786B (en) | 2019-01-21 | 2019-01-21 | Driving circuit and driving method of display panel and display device |
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| CN109584786B (en) | 2020-12-04 |
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