CN106611585B - Drive circuit, display panel and display device - Google Patents
Drive circuit, display panel and display device Download PDFInfo
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- CN106611585B CN106611585B CN201710117318.1A CN201710117318A CN106611585B CN 106611585 B CN106611585 B CN 106611585B CN 201710117318 A CN201710117318 A CN 201710117318A CN 106611585 B CN106611585 B CN 106611585B
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- 108010075750 P-Type Calcium Channels Proteins 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
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- 229910052738 indium Inorganic materials 0.000 description 1
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Classifications
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Compared with the driving circuit in the prior art, the driving circuit provided by the invention has the advantages that the position of the capacitor is changed, one end of the capacitor is connected with a voltage end through the light-emitting element, and the first end of the capacitor is connected with the grid electrode of the driving tube. The driving circuit provided by the invention keeps the anode potential of the OLED device fixed only by changing the structure of the driving circuit, so that the gate-source voltage of the NMOS driving tube is not changed, the output current of the driving transistor is ensured not to be changed by the difference of the threshold voltage of the driving tube, the threshold voltage of the OLED device and the partial pressure of the OLED device, and the stability of the current passing through the OLED display device in the pixel display time period is further improved, and the uniformity of the display brightness is improved.
Description
Technical field
The present invention relates to field of display technology, fill more specifically to a kind of driving circuit, display panel and display
It sets.
Background technique
OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) display device in the prior art
Pixel-driving circuit in driving transistor TFT (Thin Film Transistor, thin film transistor (TFT)) be usually PMOS
(Positive channel MetalOxide Semiconductor, P-type channel metal oxide semiconductor field effect tube).
But with the development of OLED drive, the material of TFT use gradually IGZO (oxide of the zinc of gallium containing indium) and its
Similar material is made, and is only capable of being formed using the transistor fabrication of NMOS type at present, therefore, the pixel driver of OLED display
Driving transistor in circuit is NMOS type.But transistor driving OLED display is driven using NMOS type, at certain
In a little periods, it will cause that the stability that pixel in OLED display show is bad, and brightness disproportionation etc. is extremely.
Summary of the invention
In view of this, the present invention provides a kind of driving circuit, display panel and display device, to solve in the prior art
When driving transistor using NMOS type, within certain periods caused by pixel is shown in OLED display stability
The problem of difference, brightness disproportionation.
To achieve the above object, the invention provides the following technical scheme:
A kind of driving circuit, comprising: the first input module, the first input node, the first control module, driving tube, second
Control module, the second input node and capacitor；
In response to the signal of the first control terminal, control first voltage end and first input save first input module
On-state between point, and, in response to the signal of the second control terminal, control second voltage end and first input node
Between on-state, wherein the first end of the driving tube is as first input node；
First control module controls the grid at tertiary voltage end and the driving tube in response to the signal of third control terminal
On-state between pole, and, in response to the signal of the first control terminal, control the second end and described second of the driving tube
On-state between input node；
Second control module controls the first end and the driving of the capacitor in response to the signal of the second control terminal
On-state between the second end of pipe, and, control the on-state between the 4th voltage end and the second end of the capacitor；
The second end of the capacitor is connected by light-emitting component with the 5th voltage end, the first end of the capacitor and the drive
The grid of dynamic pipe is connected, and the second end of the capacitor is as second input node.
The present invention also provides a kind of display panels, including an any of the above driving circuit, the driving circuit to exist:
First detecting the period, close the first transistor, second transistor, the 4th transistor, the 5th transistor and
6th transistor, opens the third transistor, described in the first end of the grid of the driving tube and the capacitor inputs
The voltage signal at tertiary voltage end；
Second detecting period, the first transistor, third transistor and the 4th transistor are closed, opens described second
Transistor, the 5th transistor and the 6th transistor, the drain electrode of the driving tube input the voltage signal at the second voltage end,
The second end of the capacitor inputs the voltage signal of the 4th voltage end；
Third detects the period, closes the second transistor, third transistor, the 5th transistor and the 6th transistor,
The first transistor and the 4th transistor are opened, the grid of the driving tube and the voltage difference of source electrode are equal to the capacitor
Voltage value.
The present invention also provides a kind of display devices, including display panel recited above.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
Driving circuit provided by the present invention, only by changing driving circuit structure, so that the anode potential of OLED device
It is kept fixed, so that the gate source voltage of NMOS driving tube is constant, guarantees that the output electric current of driving transistor is not driven pipe
Threshold voltage and OLED device threshold voltage and OLED device partial pressure it is different and change, and then improve OLED and show
The stability for the electric current that showing device passes through in picture-point time section, the uniformity of display brightness.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is drive circuit schematic diagram in the prior art；
Fig. 2 is the driver' s timing figure of driving circuit in the prior art；
Fig. 3 is that the driving tube of driving circuit in the prior art exports electric current IPVEEWith the relationship of second voltage end Vdata
Scheme IPVEE-VdataCurve simulation figure；
Fig. 4 is that the driving tube of driving circuit in the prior art exports electric current IPVEEVariable quantity percentage curve simulation drawing；
Fig. 5 is a kind of driving circuit structure schematic diagram provided in an embodiment of the present invention；
Fig. 6 is real work circuit diagram of the prior art driving circuit within the T3 period；
Fig. 7 is real work circuit diagram of the driving circuit provided in an embodiment of the present invention within the T3 period；
Fig. 8 is that the driving tube of driving circuit provided in an embodiment of the present invention exports electric current IPVEEWith second voltage end Vdata
Relational graph IPVEE-VdataCurve simulation figure；
Fig. 9 is that the driving tube of driving circuit provided in an embodiment of the present invention exports electric current IPVEEVariable quantity percentage curve mould
Quasi- figure；
When Figure 10 is driving circuit threshold voltage variation provided in an embodiment of the present invention, driving tube exports current curve
Figure；
Figure 11 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
As background technology part is sayed, since the TFT of oxide semiconductor material is only capable of the crystal using NMOS type
Pipe makes to be formed, and therefore, the driving tube in the pixel-driving circuit of OLED display is NMOS type.But in reality
In use process, inventors have found that using the display picture of the OLED display of PMOS driving tube in compared with the existing technology
For, after driving tube is converted into NMOS driving tube, within certain periods, will cause pixel in OLED display show it is steady
Qualitative bad, brightness disproportionation etc. is abnormal.
Referring to Figure 1 and Fig. 2, when wherein Fig. 1 is that PMOS TFT is converted NMOS TFT by inventor, corresponding driving is electric
Road, Fig. 2 are the driver' s timing figure of the driving circuit, wherein driving circuit includes: the first transistor M1, second transistor M2, the
Three transistor M3, the 4th transistor M6, the 5th transistor M5, the 6th transistor M7, driving tube M4 and capacitor C；Voltage end includes
Tertiary voltage end Vref1, second voltage end Vdata, the 5th voltage end PVEE, the 4th voltage end Vref2, first voltage end
PVDD；Controlling end signal includes the first control terminal Emit signal, the second control terminal Scan2 signal and third control terminal Scan1 letter
Number；Each section connection relationship is as shown in Figure 1.
Inventor is learnt by calculating, in driving circuit shown in Fig. 1, in the T3 period in Fig. 2, and the grid of driving tube M4
Source pressure difference is Vdata+Vth, VthFor the threshold voltage of driving tube M4, ideally, it is K that driving tube M4, which exports electric current,n*(Vdata)2。
From current formula as can be seen that in the case where Vdata is constant, the output electric current of driving tube M4 is constant, OLED display
All pixels are shown should be identical, and display brightness is uniform, but actual conditions are different from this theory deduction result ideally.
Inventors discovered through research that OLED display, within the T3 period, OLED device is to driving tube source voltage
The partial pressure of formation, the electric current that can input OLED device to circuit impacts, so that OLED display is in the T3 period
Inside there is the brightness difference that the stability that pixel is shown is bad, and different OLED are shown, causes brightness disproportionation etc. abnormal.
Concrete condition, inventor are obtained as shown in Table 1 below by the resistance of the OLED device in change driving circuit
Electric current and current change quantity percentage analogue data；For convenience of the variation for intuitively embodying the analogue data, OLED device is made
Resistance variations caused by driving tube export electric current IPVEEWith the relational graph I of second voltage end VdataPVEE-VdataCurve such as Fig. 3
Shown and current change quantity percentage curve figure is as shown in Figure 4.
The relationship and electric current of corresponding driving TFT output electric current and second voltage end voltage become when 1 OLED device resistance of table
Change amount analogue data table
Wherein, in analogue data, the breadth length ratio W/L=5/5 of driving tube M4；The breadth length ratio W/L=5/5, C of other transistors
=150fF；OLED device capacitor 0.2pF；First voltage end PVDD=5V；5th voltage end PVEE=-1V；Tertiary voltage end
Vref1=10V；4th voltage end Vref2=-1V.
It can be obtained by the analogue data and Fig. 3 of table 1 and the simulation curve of Fig. 4, the resistance change of OLED device can change
OLED device is different to the partial pressure of driving tube TFT to the partial pressure situation of driving tube TFT namely different OLED device, and with
The increase for inputting Vdata, bigger to the partial pressure of driving TFT when OLED resistance is bigger, driving circuit current output characteristics curve
Differentiation be more obvious.The resistance of different OLED device is different, and current change quantity percentage substantially remains in 10%-20% range
It is interior.
It can be seen that the partial pressure of OLED device has larger impact to NMOS TFT output electric current, inventor thinks this influence
It may be caused by the property (such as threshold voltage) of technique or device itself, the stabilization shown so as to cause pixel in OLED screen curtain
Property it is bad, brightness disproportionation etc. is abnormal.
Based on this, the present invention provides a kind of driving circuit, comprising: the first input module, the first input node, the first control
Module, driving tube, the second control module, the second input node and capacitor；
In response to the signal of the first control terminal, control first voltage end and first input save first input module
On-state between point, and, in response to the signal of the second control terminal, control second voltage end and first input node
Between on-state, wherein the first end of the driving tube is as first input node；
First control module controls the grid at tertiary voltage end and the driving tube in response to the signal of third control terminal
On-state between pole, and, in response to the signal of the first control terminal, control the second end and described second of the driving tube
On-state between input node；
Second control module controls the first end and the driving of the capacitor in response to the signal of the second control terminal
On-state between the second end of pipe, and, control the on-state between the 4th voltage end and the second end of the capacitor；
The second end of the capacitor is connected by light-emitting component with the 5th voltage end, the first end of the capacitor and the drive
The grid of dynamic pipe is connected, and the second end of the capacitor is as second input node.
Driving circuit provided by the invention, by changing the position of capacitor, so that in the time of driving circuit, on capacitor
Charge can not flow, and the voltage difference at both ends maintains to fix, so that the grid source pressure difference of driving tube is equal to the pressure difference of capacitor, so that
The current potential of second input node keeps stablizing, and the grid source pressure difference of driving tube remains unchanged, and then avoids the threshold value electricity of driving tube
It presses and the output electric current of driving tube is impacted with the threshold voltage of OLED device, ensure that the stability of output electric current, so that
The display of display device is more uniform.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 5 is referred to, Fig. 5 provides a kind of driving circuit structure schematic diagram for the present invention；The driving circuit includes: first
Input module 101, the first input node N1, the first control module 102, driving tube M4, the input of the second control module 103, second
Node N2 and capacitor C；First input module 101 controls first voltage end PVDD in response to the signal of the first control terminal Emit
With the on-state between the first input node N1, and, in response to the signal of the second control terminal Scan2, control second voltage
Hold the on-state between Vdata and the first input node N1, wherein the first end of driving tube M4 is as the first input node
N1；First control module 102 controls tertiary voltage end Vref1's and driving tube M4 in response to the signal of third control terminal Scan1
On-state between grid, and, in response to the signal of the first control terminal Emit, control the second end and second of driving tube M4
On-state between input node N2；Second control module 103 controls capacitor in response to the signal of the second control terminal Scan2
First end and driving tube M4 second end between on-state, and, the of the 4th voltage end Vref2 of control and capacitor C
On-state between two ends；The second end of capacitor C is connected by light-emitting component with the 5th voltage end PVEE, and the first of capacitor C
End is connected with the grid of driving tube M4, and the second end of capacitor C is as the second input node N2.
Specifically, the first input module 101 includes: the first transistor M1 and second transistor M2 in the present embodiment；The
The grid of one transistor M1 is connected with the first control terminal Emit, and the first end of the first transistor M1 is connected to first voltage end
PVDD, the second end of the first transistor M1 are connected to the first input node N1；The grid of second transistor M2 and the second control terminal
Scan2 is connected, and the first end of second transistor M2 is connected to second voltage end Vdata, the second end connection of second transistor M2
To the first input node N1.
First control module 102 includes: third transistor M3 and the 4th transistor M6；The first end of third transistor M3
It is connected with tertiary voltage end Vref1, the grid of third transistor M3 is connected with third control terminal Scan1, third transistor M3's
Second end is connected with the grid of driving tube M4；The first end of 4th transistor M6 is connected with the second end of driving tube M4, and the 4th is brilliant
The second end of body pipe M6 is connected with the second end of capacitor C and the second input node N2, the grid and first of the 4th transistor M6
Control terminal Emit is connected.
Second control module 103 includes: the 5th transistor M5 and the 6th transistor M7；The first end of 5th transistor M5
It is connected with the second end of driving tube M4, the grid of the 5th transistor M5 is connected with the second control terminal Scan2, the 5th transistor M5's
Second end is connected with the first end of capacitor C；The first end of 6th transistor M7 is connected with the 4th voltage end Vref2, the 6th crystal
The second end of pipe M7 is connected with the second end of capacitor C, and the grid of the 6th transistor M7 is connected with the second control terminal Scan2.
Wherein, driving tube M4, the first transistor M1, second transistor M2, third transistor M3, in the embodiment of the present invention
Four transistor M6, the 5th transistor M5 and the 6th transistor M7 are N-type metal-oxide-semiconductor.
It should be noted that in the embodiment of the present invention, the voltage value of tertiary voltage end Vref1, second voltage end Vdata
Voltage value, the voltage value of the 5th voltage end PVEE, the 4th voltage end Vref2 voltage value relationship meet: Vref1 > Vdata
And PVEE >=Vref2.
When the driver' s timing figure of the driving circuit provided in the embodiment of the present invention is with the driving of NMOS TFT in the prior art
Sequence figure is identical, as shown in Fig. 2, this is not described in detail in the present embodiment, wherein the first control terminal Emit and the second control terminal
The level of the signal of Scan2 output is opposite.
In the embodiment of the present invention without limitation to the light-emitting component, it is optionally Organic Light Emitting Diode.
Drive circuit works principle provided in an embodiment of the present invention are as follows:
In the T1 period, third transistor M3 is opened, and the first transistor M1, the 4th transistor M6 are closed, driving tube M4 grid
Current potential is Vref1, and the one end capacitor C voltage becomes Vref1 via third transistor M3 at this time；Wherein current potential meets relationship: Vref1
> Vdata and PVEE >=Vref2.
In the T2 period, second transistor M2 is opened, and Vdata is input to the drain electrode of driving tube M4 by second transistor M2；
Third transistor M3 is closed, and the 5th transistor M5 is opened, due to Vref1 > Vdata, driving tube M4 grid potential from
Vref1 is toward decline, until being Vdata+Vth (threshold voltage that Vth is driving tube M4).6th transistor M7 is opened, electric at this time
The appearance both ends C pressure difference is Vdata+Vth-Vref2.
In the T3 period, second transistor M2, the 5th transistor M5, the 6th transistor M7 are closed, and capacitor C charge can not flow
Dynamic, the voltage difference of the two ends of capacitor maintains Vdata+Vth-Vref2；The first transistor M1, the 4th transistor M6 are open state,
Driving tube M4 grid source pressure difference is equal to the pressure difference at the both ends capacitor C, i.e. Vdata+Vth-Vref2.So when driving tube M4 electric current be
Kn*(Vdata–Vref2)2, it is not driven the influence of the threshold voltage or resistance of pipe M4 and OLED device.
Wherein, the electric current of driving tube M4 is not driven the influence of the threshold voltage or resistance of pipe M4 and OLED, specifically can be with
It is illustrated by following comparison situation.
As shown in Figure 6 and Figure 7, wherein Fig. 6 is real work circuit diagram of the prior art driving circuit within the T3 period；
Fig. 7 is real work circuit diagram of the driving circuit provided in an embodiment of the present invention within the T3 period；Wherein, the second input node
N2 is equivalent to the source electrode of driving tube, while being also the anode of OLED.
As shown in fig. 6, the current potential of the second input node N2 can not be fixed after the 4th transistor M6 is opened, it can be due to OLED
The changes of threshold or resistance variations of device make the gate source voltage Vgs of driving tube M4 change, and lead to the output electricity of driving tube M4
Stream changes, and influences OLED exhibit stabilization.
As shown in fig. 7, one end of capacitor C connects one end of the second input node N2 by after the position movement of capacitor C, from
And it is able to maintain the current potential of the second input node N2, go back the current potential of the second input node N2 after the 4th transistor M6 opening
It is able to maintain stabilization, so the gate source voltage of driving tube M4 keeps Vgs constant, to guarantee the stabilization of the output electric current of driving tube M4
The uniformity that property and OLED are shown.
For confirm driving circuit provided in an embodiment of the present invention have the output electric current for improving driving tube M4 stability and
The effect for the uniformity that OLED is shown, this is illustrated by analogue data by inventor, specific as follows:
It obtains a result identical thinking with the analogue data of driving circuit in the prior art, by changing in driving circuit
The resistance of OLED device obtains electric current and current change quantity percentage analogue data as shown in table 2 below；It is embodied for convenience of intuitive
The variation of the analogue data makes the output of driving tube caused by the resistance variations of OLED device electric current IPVEEWith second voltage end
The relational graph I of VdataPVEE-VdataCurve as shown in figure 8, and current change quantity percentage curve figure it is as shown in Figure 9.
The relationship and electric current of corresponding driving TFT output electric current and second voltage end voltage become when 2 OLED device resistance of table
Change amount analogue data table
Wherein, in analogue data, the breadth length ratio W/L=5/5 of driving tube M4；The breadth length ratio W/L=5/5, C of other transistors
=150fF；OLED device capacitor 0.2pF；First voltage end PVDD=5V；5th voltage end PVEE=-1V；Tertiary voltage end
Vref1=10V；4th voltage end Vref2=-1V.
It can be obtained by the analogue data and Fig. 8 of table 2 and the simulation curve of Fig. 9, OLED caused by the resistance of OLED device changes
Device is no longer obvious to the partial pressure situation of driving tube TFT, and OLED device resistance is different, and the output electric current of driving tube is essentially identical.
The resistance of different OLED device is different, and current change quantity percentage also substantially remains within 5%, compared with the existing technology in
It is small much within the scope of 10%-20%.After the resistance for changing OLED device, device changes for the partial pressure of driving TFT,
But its curve of output variation percentage (corresponding diagram 9) is still relatively stable, and OLED changes the influence of the partial pressure of driving tube TFT source electrode
It is kind.
It should be noted that driving circuit has valve value compensation function in the prior art, i.e., sent out in driving tube threshold voltage
When changing, the output electric current of driving tube is basically unchanged.And after capacitance positions change in the driving circuit in the present embodiment,
Inventor obtains data and driving tube shown in Fig. 10 in table 3 by simulation and exports current curve figure.From table 3 and Figure 10
As can be seen that even if the threshold voltage of driving tube is changed in, output electric current does not change substantially, i.e., in the present embodiment
Driving circuit in after capacitance positions change, equally there is valve value compensation function, valve value compensation function is not disappeared
It loses.
When 3 OLED device parasitic capacitance of table is 5fF, threshold voltage exports electric current after changing and the relationship of Vdata simulates number
According to table
Wherein, in analogue data, the breadth length ratio W/L=5/5 of driving tube M4；The breadth length ratio W/L=5/5, C of other transistors
=150fF；OLED device capacitor 0.2pF；First voltage end PVDD=5V；5th voltage end PVEE=-1V；Tertiary voltage end
Vref1=10V；4th voltage end Vref2=-1V.
Driving circuit provided in an embodiment of the present invention, only by changing driving circuit structure, so that the anode of OLED device
Current potential is kept fixed, so that the gate source voltage of NMOS driving tube is constant, guarantees that the output electric current of driving transistor is not driven
The threshold voltage of dynamic pipe is different with the partial pressure of the threshold voltage of OLED device and OLED device and changes, and then improves
The stability for the electric current that OLED display passes through in picture-point time section, the uniformity of display brightness.
The embodiment of the present invention also provides a kind of display panel, including the driving circuit that above example provides, the driving
Circuit exists:
First detecting period, close the first transistor M1, second transistor M2, the 4th transistor M6, the 5th transistor M5
And the 6th transistor M7, third transistor M3 is opened, it is electric that the grid of driving tube M4 and the first end of capacitor C inputs third
The voltage signal of pressure side Vref1；
Second detecting period, the first transistor M1, third transistor M3 and the 4th transistor M6 are closed, it is brilliant to open second
Body pipe M2, the 5th transistor M5 and the 6th transistor M7, the voltage letter of the drain electrode input second voltage end Vdata of driving tube M4
Number, the second end of capacitor C inputs the voltage signal of the 4th voltage end Vref2；
Third detects the period, closes second transistor M2, third transistor M3, the 5th transistor M5 and the 6th transistor
M7, opens the first transistor M1 and the 4th transistor M6, and the grid of driving tube M4 and the voltage difference of source electrode are equal to the electricity of capacitor C
Pressure value.
Wherein, the voltage value of tertiary voltage end Vref1, the voltage value of second voltage end Vdata, the 5th voltage end PVEE
Voltage value, the 4th voltage end Vref2 voltage value relationship meet: Vref1 > Vdata and PVEE >=Vref2.
The embodiment of the present invention also provides a kind of display device, as shown in figure 11, including a upper display as described in the examples
Panel.It should be noted that only taking the mobile phone as an example the explanation display device in the present embodiment, but not to institute in the present embodiment
Display device is stated to limit.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.To the upper of the disclosed embodiments
It states bright, enables those skilled in the art to implement or use the present invention.Various modifications to these embodiments are to ability
Will be apparent for the professional technician in domain, the general principles defined herein can not depart from it is of the invention
In the case where spirit or scope, realize in other embodiments.Therefore, the present invention be not intended to be limited to it is shown in this article these
Embodiment, and it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. a kind of driving circuit characterized by comprising the first input module, the first control module, drives at the first input node
Dynamic pipe, the second control module, the second input node and capacitor；
First input module in response to the first control terminal signal, control first voltage end and first input node it
Between on-state, and, in response to the signal of the second control terminal, control between second voltage end and first input node
On-state, wherein the first end of the driving tube is as first input node；
First control module in response to third control terminal signal, control tertiary voltage end and the driving tube grid it
Between on-state, and, in response to the signal of the first control terminal, control the second end and second input of the driving tube
On-state between node；
Second control module in response to the signal of the second control terminal, control the capacitor first end and the driving tube
On-state between second end, and, control the on-state between the 4th voltage end and the second end of the capacitor；
The second end of the capacitor is connected by light-emitting component with the 5th voltage end, the first end of the capacitor and the driving tube
Grid be connected, the second end of the capacitor is as second input node；
Wherein, first input module includes: the first transistor and second transistor；
The grid of the first transistor is connected with first control terminal, and the first end of the first transistor is connected to described
First voltage end, the second end of the first transistor are connected to first input node；
The grid of the second transistor is connected with second control terminal, and the first end of the second transistor is connected to described
Second voltage end, the second end of the second transistor are connected to first input node；
First control module includes: third transistor and the 4th transistor；
The first end of the third transistor is connected with the tertiary voltage end, the grid of the third transistor and the third
Control terminal is connected, and the second end of the third transistor is connected with the grid of the driving tube；
The first end of 4th transistor is connected with the second end of the driving tube, the second end of the 4th transistor and institute
The second end and second input node for stating capacitor are connected, grid and the first control terminal phase of the 4th transistor
Even；
Second control module includes: the 5th transistor and the 6th transistor；
The first end of 5th transistor is connected with the second end of the driving tube, the grid of the 5th transistor with it is described
Second control terminal is connected, and the second end of the 5th transistor is connected with the first end of the capacitor；
The first end of 6th transistor is connected with the 4th voltage end, the second end of the 6th transistor and the electricity
The second end of appearance is connected, and the grid of the 6th transistor is connected with second control terminal.
2. driving circuit according to claim 1, which is characterized in that the driving tube, the first transistor, the second crystal
Pipe, third transistor, the 4th transistor, the 5th transistor and the 6th transistor are N-type metal-oxide-semiconductor.
3. driving circuit according to claim 2, which is characterized in that the voltage value Vref1 at the tertiary voltage end, described
The voltage value Vdata at second voltage end, the voltage value PVEE of the 5th voltage end, the 4th voltage end voltage value
The relationship of Vref2 meets: Vref1 > Vdata and PVEE >=Vref2.
4. driving circuit according to claim 1, which is characterized in that first control terminal and second control terminal are defeated
The level of signal out is opposite.
5. driving circuit according to claim 1, which is characterized in that the light-emitting component is Organic Light Emitting Diode.
6. a kind of display panel, which is characterized in that including any one driving circuit as described in claim 1-3, the drive
Dynamic circuit exists:
First detecting period, close the first transistor, second transistor, the 4th transistor, the 5th transistor and the 6th
Transistor, opens the third transistor, and the first end of the grid of the driving tube and the capacitor inputs the third
The voltage signal of voltage end；
Second detecting period, the first transistor, third transistor and the 4th transistor are closed, opens second crystal
Pipe, the 5th transistor and the 6th transistor, the drain electrode of the driving tube inputs the voltage signal at the second voltage end, described
The second end of capacitor inputs the voltage signal of the 4th voltage end；
Third detects the period, closes the second transistor, third transistor, the 5th transistor and the 6th transistor, opens
The first transistor and the 4th transistor, the grid of the driving tube and the voltage difference of source electrode are equal to the voltage of the capacitor
Value.
7. display panel according to claim 6, which is characterized in that the voltage value Vref1 at the tertiary voltage end, described
The voltage value Vdata at second voltage end, the voltage value PVEE of the 5th voltage end, the 4th voltage end voltage value
The relationship of Vref2 meets: Vref1 > Vdata and PVEE >=Vref2.
8. a kind of display device, which is characterized in that including display panel described in claim 6 or 7.
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| CN201710117318.1A CN106611585B (en) | 2017-03-01 | 2017-03-01 | Drive circuit, display panel and display device |
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| CN201710117318.1A CN106611585B (en) | 2017-03-01 | 2017-03-01 | Drive circuit, display panel and display device |
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| FR3069379B1 (en) * | 2017-07-21 | 2019-08-23 | Aledia | OPTOELECTRONIC DEVICE |
| CN110288948A (en) * | 2019-06-27 | 2019-09-27 | 京东方科技集团股份有限公司 | A kind of pixel compensation circuit and method, display drive apparatus and display equipment |
| CN111754940B (en) * | 2020-07-28 | 2021-10-26 | 武汉天马微电子有限公司 | Pixel driving circuit, driving method thereof and display device |
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