CN107146577B - A kind of pixel circuit, its driving method, display panel and display device - Google Patents
A kind of pixel circuit, its driving method, display panel and display device Download PDFInfo
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- CN107146577B CN107146577B CN201710493101.0A CN201710493101A CN107146577B CN 107146577 B CN107146577 B CN 107146577B CN 201710493101 A CN201710493101 A CN 201710493101A CN 107146577 B CN107146577 B CN 107146577B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—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
-
- 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
Abstract
The invention discloses a kind of pixel circuit, its driving method, display panel and display devices, comprising: coupling control module, drive module, compensating module and luminescent device；Luminescent device can be driven to shine by the mutual cooperation of these modules, and the signal at LED control signal end is coupled in coupling stages just because of coupling control module the first pole of driving transistor, improve the voltage for driving the first pole of transistor, it can be chronically under forward bias to avoid driving transistor, the time for having given drive transistor characteristics to restore, to make that the threshold voltage shift of transistor and mobility change is driven comparatively fast to restore normal, and then avoid display abnormal, improve exhibit stabilization.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of pixel circuit, its driving method, display panel and display
Device.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) is current flat-panel monitor research
One of the hot spot in field is compared with liquid crystal display (Liquid Crystal Display, LCD), and OLED display has low
The advantages that energy consumption, self-luminous, wide viewing angle and fast response time.Currently, in display fields such as mobile phone, tablet computer, digital cameras,
OLED display, which has begun, replaces traditional LCD display.Different using stable voltage control brightness from LCD, OLED belongs to
It is driven in electric current, needs stable electric current to control it and shine.The general driving by pixel-driving circuit in OLED display
Transistor come drive OLED shine.
However, OLED display when switching to 128 grey menu after showing gridiron pattern picture 1 minute, is drawn in 128 grayscale
It can be observed that apparent ghost (Image retention) phenomenon in face.This is because when showing gridiron pattern picture, driving
OLED luminous driving transistor is under same bias for a long time, especially under positive bias, leads to the threshold value for driving transistor
Voltage drift and mobility change gradually aggravate and cannot restore normal in time, and which results in 128 grey menus
When flow through the electric current of each OLED and change, cause display brightness uneven, cause display abnormal, to influence the steady of display
It is qualitative.
Summary of the invention
The embodiment of the present invention provides a kind of pixel circuit, its driving method, display panel and display device, existing to solve
Have in technology since driving transistor is under same bias for a long time, causes drive transistor characteristics to drift about, cause to show different
The problem of often and influencing the stability of display.
Therefore, the embodiment of the invention provides a kind of pixel circuits, comprising: coupling control module, drive module, compensation mould
Block and luminescent device；
The drive module includes: driving transistor, the first transistor and second transistor；The first transistor
Control electrode is connected with LED control signal end, and the first pole of the first transistor is connected with the first power end, and described first is brilliant
Second pole of body pipe is extremely connected with the first of the driving transistor；The control electrode of the second transistor and the light emitting control
Signal end is connected, and the first pole of the second transistor is extremely connected with the second of the driving transistor, the second transistor
The second pole be connected with the first end of the luminescent device；The second end of the luminescent device is connected with second source end；It is described
Drive module is for driving the luminescent device to shine；
The first pole phase that control module is coupled respectively with the LED control signal end and the driving transistor
Even, for coupling the signal at the LED control signal end to the first pole of the driving transistor；
The compensating module is connected with the driving transistor, for the driving transistor and the luminescent device into
Row initializes and the driving transistor is written in the threshold voltage of the signal of data signal end and the driving transistor
Control electrode.
Preferably, in above-mentioned pixel circuit provided in an embodiment of the present invention, the coupling control module includes coupling electricity
Hold；
The first end of the coupled capacitor is connected with the LED control signal end, second end and the driving transistor
First is extremely connected.
Preferably, in above-mentioned pixel circuit provided in an embodiment of the present invention, the compensating module includes: initialization submodule
Block, data write-in submodule, sub-module stored and compensation control submodule；Wherein,
The initialization submodule control with the first scanning signal end, initializing signal end, the driving transistor respectively
The first end of pole processed and the luminescent device be connected, under the control at first scanning signal end respectively to the drive
The control electrode of dynamic transistor and the first end of the luminescent device are initialized；
Data write-in submodule respectively with the second scanning signal end, the data signal end and the driving crystal
The first of pipe is extremely connected, for the signal of the data signal end to be supplied to institute under the control at second scanning signal end
State the first pole of driving transistor；
It is described compensation control submodule respectively with second scanning signal end, it is described driving transistor control electrode and
The second of the driving transistor is extremely connected, for the driving transistor to be connected under the control at second scanning signal end
Control electrode and the second pole；
The sub-module stored is connected with the control electrode of first power end and the driving transistor respectively, is used for
Charge or discharge are carried out under the co- controlling of the signal of the control electrode of first power end and the driving transistor, and
The control electrode of the driving transistor and first electricity are kept when the control electrode of the driving transistor is in floating
Voltage difference between source is stablized.
Preferably, in above-mentioned pixel circuit provided in an embodiment of the present invention, the initialization submodule includes: third crystalline substance
Tetra- transistor of body Guan Yu；
The control electrode of the third transistor is connected with first scanning signal end, the first pole and the initializing signal
End is connected, and the second pole is connected with the control electrode of the driving transistor；
The control electrode of 4th transistor is connected with first scanning signal end, the first pole and the initializing signal
End is connected, and the second pole is connected with the first end of the luminescent device.
Preferably, in above-mentioned pixel circuit provided in an embodiment of the present invention, the data write-in submodule includes: the 5th
Transistor；
The control electrode of 5th transistor is connected with second scanning signal end, the first pole of the 5th transistor
It is connected with the data signal end, the second pole of the 5th transistor is extremely connected with the first of the driving transistor.
Preferably, in above-mentioned pixel circuit provided in an embodiment of the present invention, the compensation control submodule includes: the 6th
Transistor:
The control electrode of 6th transistor is connected with second scanning signal end, the first pole of the 6th transistor
Extremely it is connected with the second of the driving transistor, the control electrode phase of the second pole of the 6th transistor and the driving transistor
Even.
Preferably, in above-mentioned pixel circuit provided in an embodiment of the present invention, the memory module includes: storage capacitance；
The first end of the storage capacitance is connected with first power end, the control of second end and the driving transistor
Extremely it is connected.
Preferably, in above-mentioned pixel circuit provided in an embodiment of the present invention, all transistors are P-type transistor.
Correspondingly, the embodiment of the invention also provides a kind of display panels, including above-mentioned provided in an embodiment of the present invention
A kind of pixel circuit.
Correspondingly, the embodiment of the invention also provides a kind of display device, including it is provided in an embodiment of the present invention above-mentioned aobvious
Show panel.
Correspondingly, any of the above-described kind of pixel electricity provided in an embodiment of the present invention is used the embodiment of the invention also provides a kind of
The driving method on road, comprising:
Initial phase, the compensating module initialize the driving transistor with the luminescent device；
Data write phase, the compensating module by the signal of data signal end and it is described driving transistor threshold voltage
The control electrode of the driving transistor is written；
First light emitting phase, the first transistor, the second transistor and the drive in the drive module
Dynamic transistor turns, drive the luminescent device to shine；
The signal at the LED control signal end is coupled to the driving crystal by coupling stages, the coupling control module
First pole of pipe.
It correspondingly, include coupling in the coupling control module in above-mentioned driving method provided in an embodiment of the present invention
When capacitor, the coupling stages are specifically included: the coupled capacitor is by the signal coupling of the high potential at the LED control signal end
It is bonded to the first pole of the driving transistor, to improve the voltage of the first pole of the driving transistor.
Correspondingly, in above-mentioned driving method provided in an embodiment of the present invention, the initial phase is specifically included: described
Initialization submodule is under the control at first scanning signal end respectively to the control electrode for driving transistor and the hair
The first end of optical device is initialized, to discharge the sub-module stored；
The data write phase specifically includes: control of the data write-in submodule at second scanning signal end
The lower signal by the data signal end is supplied to the first pole of the driving transistor；The compensation control submodule is described
Control electrode and the second pole that the driving transistor is connected under the control at the second scanning signal end, make the driving transistor turns
It charges to the sub-module stored；
First light emitting phase further include: the sub-module stored keep it is described driving transistor control electrode with it is described
Voltage difference between first power end is stablized；
In the coupling stages further include: the sub-module stored keeps the control electrode and described the of the driving transistor
Voltage difference between one power end is stablized.
Correspondingly, in above-mentioned driving method provided in an embodiment of the present invention, after the coupling stages, further includes:
Second light emitting phase；
The first transistor, the second transistor in second light emitting phase, the drive module and
The driving transistor turns drive the luminescent device to shine.
Correspondingly, in above-mentioned driving method provided in an embodiment of the present invention, second light emitting phase further include: described
Sub-module stored keeps the voltage difference between the control electrode and first power end of the driving transistor to stablize.
The present invention has the beneficial effect that:
Pixel circuit, its driving method, display panel and display device provided in an embodiment of the present invention, comprising: coupling control
Molding block, drive module, compensating module and luminescent device；Wherein, the drive module is for driving luminescent device to shine and wrap
It includes: driving transistor, the first transistor and second transistor；The control electrode of the first transistor and LED control signal end phase
Even, the first pole of the first transistor is connected with the first power end, the second pole of the first transistor and the first pole of driving transistor
It is connected；The control electrode of second transistor is connected with LED control signal end, the first pole and the driving transistor of second transistor
Second is extremely connected, and the second pole of second transistor is connected with the first end of luminescent device；The second end of luminescent device and the second electricity
Source is connected；Coupling control module is used to couple the signal at LED control signal end to the first pole of driving transistor；Compensation
Module is used to carry out driving transistor and luminescent device initialization and by the signal of data signal end and driving transistor
The control electrode of threshold voltage write driver transistor.Luminescent device can be driven to shine, and just because of coupling control module
The signal at LED control signal end can be coupled to the first pole of driving transistor in coupling stages, so that driving transistor the
The voltage of one pole improves, and can be chronically under forward bias to avoid driving transistor, drive transistor characteristics has been given to restore
Time to make that the threshold voltage shift of transistor and mobility change is driven comparatively fast to restore normally, and then avoids display abnormal,
Improve the stability of display.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 2 is the concrete structure schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 3 is the concrete composition structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 4 is the timing diagram of pixel circuit shown in Fig. 3；
Fig. 5 a is the analogue simulation signal of the signal at the first scanning signal end of pixel circuit provided in an embodiment of the present invention
Figure；
Fig. 5 b is the analogue simulation signal of the signal at the second scanning signal end of pixel circuit provided in an embodiment of the present invention
Figure；
Fig. 5 c is the analogue simulation signal of the signal at the LED control signal end of pixel circuit provided in an embodiment of the present invention
Figure；
Fig. 5 d is the analogue simulation of the voltage of the first pole of the driving transistor of pixel circuit provided in an embodiment of the present invention
Schematic diagram；
Fig. 6 is the flow chart of driving method provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of display panel provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose of the present invention, the technical scheme and advantages are more clear, with reference to the accompanying drawing, to the embodiment of the present invention
The pixel circuit of offer, its driving method, display panel and display device specific embodiment be described in detail.It should
Understand, preferred embodiment disclosed below is only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.And not
In the case where conflict, the features in the embodiments and the embodiments of the present application be can be combined with each other.
The embodiment of the invention provides a kind of pixel circuits, as shown in Figure 1, comprising: coupling control module 10, drive module
20, compensating module 30 and luminescent device L；Drive module 20 is for driving luminescent device L to shine；Drive module 20 specifically can be with
It include: driving transistor M0, the first transistor M1 and second transistor M2；The control electrode and light emitting control of the first transistor M1
Signal end Emit is connected, and the first pole of the first transistor M1 is connected with the first power end PVDD, the second pole of the first transistor M1
Extremely it is connected with the first of driving transistor M0；The control electrode of second transistor M2 is connected with LED control signal end Emit, and second
The first pole of transistor M2 is extremely connected with the second of driving transistor M0, and the second pole of second transistor M2 is with luminescent device L's
First end is connected；The second end of luminescent device L is connected with second source end PVEE；
Coupling control module 10 is extremely connected with the first of LED control signal end Emit and driving transistor M0 respectively, uses
In the first pole for coupling the signal of LED control signal end Emit to driving transistor M0；
Compensating module 30 is connected with driving transistor M0, for initializing to driving transistor M0 and luminescent device L
And by the signal of data signal end and driving transistor M0 threshold voltage write driver transistor M0 control electrode.
Above-mentioned pixel circuit provided in an embodiment of the present invention, comprising: coupling control module, drive module, compensating module with
And luminescent device；Wherein, the drive module for drive luminescent device shine and include: driving transistor, the first transistor with
And second transistor；The control electrode of the first transistor is connected with LED control signal end, the first pole and first of the first transistor
Power end is connected, and the second pole of the first transistor is extremely connected with the first of driving transistor；The control electrode and hair of second transistor
Optical control signal end is connected, and the first pole of second transistor is extremely connected with the second of driving transistor, and the second of second transistor
Pole is connected with the first end of luminescent device；The second end of luminescent device is connected with second source end；Coupling control module is used for will
The signal at LED control signal end is coupled to the first pole of driving transistor；Compensating module is used for driving transistor and photophore
Part carry out initialization and by the signal of data signal end and driving transistor threshold voltage write driver transistor control
Pole.Therefore, the embodiment of the present invention can drive luminescent device to shine by the mutual cooperation of above-mentioned each module and transistor, and
And the signal at LED control signal end can be coupled to driving transistor in coupling stages just because of coupling control module
First pole can be chronically under forward bias to avoid driving transistor, give so that the voltage of driving the first pole of transistor improves
The time that drive transistor characteristics are restored, to make that the threshold voltage shift of transistor and mobility change is driven comparatively fast to restore
Normally, it and then avoids display abnormal, improves exhibit stabilization.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the first end of luminescent device is positive
Pole, second end are cathode.Also, luminescent device is generally organic electroluminescent LED, is in saturation in driving transistor
It realizes and shines under the action of electric current when state.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in Figure 1, driving transistor
M0 can be P-type transistor；Wherein, the grid of the P-type transistor is the control electrode for driving transistor M0, and source electrode is driving crystal
The first pole of pipe M0 drains as the second pole for driving transistor M0.Also, when driving transistor M0 is P-type transistor, driving
Voltage difference V of the transistor M0 between its source electrode and its gridsgWith its threshold voltage VthBetween relationship meet formula :-Vsg<
VthWhen be connected.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in Figure 1, the first transistor
M1 and second transistor M2 is P-type transistor.And the first transistor M1 is in the control of the signal of LED control signal end Emit
Under it is in the conductive state when, by the signal of the first power end PVDD be supplied to driving transistor M0 the first pole.Second transistor
When M2 is in the conductive state under the control of the signal of LED control signal end Emit, the second pole and the hair of transistor M0 will be driven
Optical device L conducting makes the operating current for driving transistor M0 output be supplied to luminescent device L, to drive luminescent device L to shine.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in Fig. 2, compensating module has
Body may include: initialization submodule 31, data write-in submodule 32, sub-module stored 33 and compensation control submodule 34；
Wherein,
Initialization submodule 31 respectively with the first scanning signal end Scan1, initializing signal end Vinit, driving transistor
The control electrode of M0 and the first end of luminescent device L are connected, under the control of the first scanning signal end Scan1 respectively to drive
The control electrode of dynamic transistor M0 and the first end of luminescent device L are initialized；
Data be written submodule 32 respectively with the second scanning signal end Scan2, data signal end Data and driving crystal
The first of pipe M0 is extremely connected, for providing the signal of data signal end Data under the control of the second scanning signal end Scan2
To the first pole of driving transistor M0；
Compensate control electrode and drive of the control submodule 34 respectively with the second scanning signal end Scan2, driving transistor M0
The second of dynamic transistor M0 is extremely connected, the control for the conducting driving transistor M0 under the control of the second scanning signal end Scan2
Pole processed and the second pole；
Sub-module stored 33 respectively with the first power end PVDD and the control electrode of transistor M0 is driven to be connected, be used for the
Charge or discharge are carried out under the co- controlling of the signal of the control electrode of one power end PVDD and driving transistor M0, and are being driven
The control electrode of transistor M0 is kept between the control electrode and the first power end PVDD of driving transistor M0 when being in floating
Voltage difference is stablized.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the voltage V of the first power endddOne
As be positive value, the voltage V at second source endeeIt is typically grounded or be negative value, the voltage V at initial signal endinitGenerally negative value.?
In practical application, above-mentioned specific value needs to design determination according to practical situations, is not limited thereto.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, coupling control module can also be used
It charges under the co- controlling of signal and the signal of the first end of driving transistor at luminous signal end.
Combined with specific embodiments below, the present invention is described in detail.It should be noted that the present embodiment merely to
It preferably explains the present invention, but does not limit the present invention.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, coupling control mould
Block 10 can specifically include: coupled capacitor C1；
The first end of coupled capacitor C1 is connected with LED control signal end Emit, and the first of second end and driving transistor M0
Extremely it is connected.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, coupling of the coupled capacitor due to itself
Cooperation is used, first end voltage change and when its second end suspension joint, can be by the in order to keep the voltage difference at its both ends to stablize
The voltage difference of one end variation is coupled to second end.To in the voltage change of the signal at LED control signal end and its second end is floating
When connecing, the voltage difference of the signal intensity at LED control signal end can be coupled to its second end by coupled capacitor, that is, be coupled to drive
First pole of dynamic transistor.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, initialization submodule
Block 31 can specifically include: third transistor M3 and the 4th transistor M4；
The control electrode of third transistor M3 is connected with the first scanning signal end Scan1, the first pole and initializing signal end
Vinit is connected, and the second pole is connected with the control electrode of driving transistor M0；
The control electrode of 4th transistor M4 is connected with the first scanning signal end Scan1, the first pole and initializing signal end
Vinit is connected, and the second pole is connected with the first end of luminescent device L.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, third transistor
M3 and the 4th transistor M4 can be P-type transistor.Alternatively, third transistor and the 4th transistor may be N-type transistor,
It is not limited thereto.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, third transistor is in the first scanning
When in the conductive state under the control of the signal of signal end, the signal at initializing signal end can be supplied to driving transistor
Control electrode, to be initialized to driving transistor.4th transistor is on shape under the control at the first scanning signal end
When state, the signal at initializing signal end can be supplied to the first end of luminescent device, to initialize to luminescent device.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, data write-in
Module 32 can specifically include: the 5th transistor M5；
The control electrode of 5th transistor M5 is connected with the second scanning signal end Scan2, the first pole of the 5th transistor M5 with
Data signal end Data is connected, and the second pole of the 5th transistor M5 is extremely connected with the first of driving transistor M0.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, the 5th transistor
M5 can be P-type transistor.Alternatively, the 5th transistor may be N-type transistor, it is not limited thereto.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the 5th transistor is in the second scanning
When in the conductive state under the control of the signal of signal end, the signal of data signal end can be supplied to the of driving transistor
Level-one, by the signal write driver transistor of data signal end.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, compensation control
Module 34 can specifically include: the 6th transistor M6:
The control electrode of 6th transistor M6 is connected with the second scanning signal end Scan2, the first pole of the 6th transistor M6 with
The second of transistor M0 is driven extremely to be connected, the second pole of the 6th transistor M6 is connected with the control electrode of driving transistor M0.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, the 6th transistor
M6 can be P-type transistor.Alternatively, the 6th transistor may be N-type transistor, it is not limited thereto.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, the 6th transistor is in the second scanning
When in the conductive state under the control of the signal of signal end, the second of the control electrode of transistor and driving transistor can will be driven
Pole conducting, by the control of the voltage of the signal of data signal end and the threshold voltage write driver transistor for driving transistor
Pole.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, as shown in figure 3, memory module 33
It can specifically include: storage capacitance C2；
The first end of storage capacitance C2 is connected with the first power end PVDD, the control electrode phase of second end and driving transistor M0
Even.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, storage capacitance can be in the first electricity
It charges under the co- controlling of the signal of the control electrode of the signal and driving transistor of source；And in the signal of the first power end
It discharges under the co- controlling of the signal of the control electrode of driving transistor；And it is in floating in the control electrode of driving transistor
When connecing state, keeps the voltage difference between the first power end and the control electrode for driving transistor to stablize, transistor will be driven
The voltage of threshold voltage and the signal of data signal end is stored in the control electrode of driving transistor.
The above is only the specific structures of each module in the pixel circuit for illustrating the present invention embodiment offer, specific real
The specific structure of Shi Shi, above-mentioned each module are not limited to above structure provided in an embodiment of the present invention, can also be art technology
Other structures known to personnel, are not limited thereto.
Further, in order to which the fabrication processing for simplifying pixel circuit is mentioned in the embodiment of the present invention in the specific implementation
In the above-mentioned pixel circuit supplied, as shown in figure 3, all transistors can be made to be p-type switching transistor.
In the specific implementation, in above-mentioned pixel circuit provided in an embodiment of the present invention, P-type transistor is acted in high potential
Lower cut-off is connected under low potential effect；N-type transistor is connected under high potential effect, ends under low potential effect.
It should be noted that above-mentioned each transistor can be thin in above-mentioned pixel circuit provided in an embodiment of the present invention
Film transistor (TFT, Thin Film Transistor), is also possible to metal oxide semiconductor field effect tube (MOS, Metal
Oxide Scmiconductor), it is not limited thereto.In the specific implementation, the control of these transistors extremely its grid, and
According to the type of transistor and the difference of the signal of input, can using the first pole as the source electrode of transistor or drain electrode, and
Using the second pole as the drain electrode of transistor or source electrode.
Below by taking pixel circuit shown in Fig. 3 as an example, combined circuit timing diagram is to above-mentioned picture provided in an embodiment of the present invention
The course of work of plain circuit is described.High potential is indicated with 1 in described below, and 0 indicates low potential.It should be noted that 1 He
0 is logic level, merely to preferably explain the specific work process of the embodiment of the present invention, rather than in the specific implementation
The current potential being applied in the control electrode of each transistor.
As shown in figure 3, all transistors are P-type transistor；Corresponding circuit timing diagram is as shown in Figure 4.Specifically, it selects
Take initial phase T1, data write phase T2, the first light emitting phase T3 and the coupling in circuit timing diagram as shown in Figure 4
Stage T4 four-stage.
In initial phase T1, Scan1=0, Scan2=1, Emit=1, therefore third transistor M3 and the 4th transistor
M4 conducting, and the first transistor M1, second transistor M2, the 5th transistor M5 and the 6th transistor M6 are turned off.Conducting
The signal of initializing signal end Vinit is supplied to the control electrode and storage capacitance C2 of driving transistor M0 by third transistor M3,
It is initialized with the control electrode to driving transistor M0 with storage capacitance C2.4th transistor M4 of conducting is by initializing signal
The signal of end Vinit is supplied to the first end of luminescent device L, to initialize to luminescent device L.Transistor M0 is driven at this time
It is in the conductive state, preparation work is done with the signal that data signal end Data is written for next stage, but due to the second crystal
Pipe M2 cut-off, therefore luminescent device L does not shine.
In data write phase T2, Scan1=1, Scan2=0, Emit=1, therefore the 5th transistor M5 and the 6th crystal
Pipe M6 conducting, and the first transistor M1, second transistor M2, third transistor M3 and the 4th transistor M4 are turned off.Conducting
The 5th transistor M5 by the signal of data signal end Data be supplied to driving transistor M0 the first pole, therefore drive transistor
The voltage V for the signal that the first pole of M0 and the voltage of coupled capacitor C1 second end are data signal end Datadata.The 6th of conducting
The control electrode for driving transistor M0 and the second pole of driving transistor M0 is connected in transistor M6, and control driving transistor M0 is in
Diode-connected state, so that the signal of data signal end Data be made to pass through the driving transistor M0 in diode-connected state
It charges to storage capacitance C2, until the voltage of the control electrode of driving transistor M0 becomes: Vdata-|Vth| until, wherein VthIt represents
Drive the threshold voltage of transistor M0.
In the first light emitting phase T3, Scan1=1, Scan2=1, Emit=0, therefore the first transistor M1 and the second crystal
Pipe M2 conducting, and third transistor M3, the 4th transistor M4, the 5th transistor M5 and the 6th transistor M6 are turned off.Conducting
The first transistor M1 by the voltage V of the signal of the first power end PVDDddIt is supplied to the first pole of driving transistor M0, therefore is driven
The first pole of dynamic transistor M0 and the voltage of coupled capacitor C1 second end are Vdd, therefore, the voltage difference at the both ends coupled capacitor C1 is
Vdd-V(0)emit, V (0)emitRepresent the voltage of the signal of LED control signal end Emit low potential.The second transistor M2 of conducting
The second pole of transistor M0 will be driven to be connected with luminescent device L.Drive voltage and its first pole of the transistor M0 in its control electrode
Voltage co- controlling under it is in a saturated state, according to saturation state current characteristics it is found that flowing through driving transistor M0 and use
In the luminous operating current I of driving luminescent device LLMeet formula: IL=K (Vsg-|Vth|)2=K (Vdd-Vdata+|Vth|-|Vth|)2
=K (Vdd-Vdata)2；Wherein, VsgFor the source gate voltage for driving transistor M0, and Vsg=Vdd-Vdata+|Vth|；K is structure ginseng
It counts, this numerical value is relatively stable in identical structure, can be regarded as constant.Therefore luminescent device L is in operating current ILDriving under open
Originate light.
In coupling stages T4, Scan1=1, Scan2=1, Emit=1, therefore the first transistor M1, second transistor M2,
Third transistor M3, the 4th transistor M4, the 5th transistor M5 and the 6th transistor M6 are turned off, therefore luminescent device L is not
It shines.Therefore, the first pole of transistor M0 is driven to be in floating, due to the voltage of the signal of LED control signal end Emit
High potential is become from low potential, therefore the voltage change of the first end of coupled capacitor C1 is V (0)emit+ Δ v, wherein Δ v is represented
When the signal of LED control signal end Emit becomes high potential from low potential, coupled capacitor C is coupled to the voltage difference of its other end.
It is still V to keep the voltage difference at the both ends coupled capacitor C1 due to the coupling of coupled capacitor C1dd-V(0)emit, driving crystalline substance
The voltage of the first pole of body pipe M0 is raised as Vdd+ Δ v, so that the source gate voltage V of driving transistor M0sg=(Vdd+Δv)-
Vdata+|Vth|.Therefore, the voltage high that the first pole for driving transistor M0 is made by the coupling of coupled capacitor C1, can be with
Improve the V of driving transistor M0sgSize, so as to improve driving transistor M0 characteristic, make drive transistor M0 threshold
Threshold voltage drift and mobility change can comparatively fast restore normal.
In addition, can also include: the second light emitting phase T5 after coupling stages T4.In the second light emitting phase T5, Scan1
=1, Scan2=1, Emit=0, therefore the first transistor M1 and second transistor M2 conducting, and third transistor M3, the 4th crystalline substance
Body pipe M4, the 5th transistor M5 and the 6th transistor M6 are turned off.The first transistor M1 of conducting is by the first power end PVDD
Signal voltage VddIt is supplied to the first pole of driving transistor M0, therefore drives the first pole and the coupled capacitor C1 of transistor M0
The voltage of second end becomes Vdd.And the signal of LED control signal end Emit becomes low potential from high potential, therefore couples electricity
Hold C1 to the voltage of the first pole of driving transistor M0 without coupling.The second transistor M2 of conducting will drive transistor M0's
Second pole is connected with luminescent device L.Drive transistor M0 in the co- controlling of the voltage of its control electrode and the voltage of its first pole
Under it is in a saturated state, according to saturation state current characteristics it is found that flow through driving transistor M0 and for drive luminescent device L send out
The operating current I of lightLMeet formula: IL=K (Vsg-|Vth|)2=K (Vdd-Vdata+|Vth|-|Vth|)2=K (Vdd-Vdata)2；Its
In, VsgFor the source gate voltage for driving transistor M0, and Vsg=Vdd-Vdata+|Vth|；K is structural parameters, this in identical structure counts
Value is relatively stable, can be regarded as constant.Therefore luminescent device L is in operating current ILDriving under restart to shine, until under
One frame starts.
It should be noted that the specific value needs of Δ v design determination according to actual application environment, do not limit herein
It is fixed.The capacitance of general couple capacitor is bigger, and its coupling ability is stronger, then Δ v is bigger.
In practical applications, when pixel shows most black picture, the voltage of the signal of the data signal end of the pixel is inputted
VdataGenerally 5.5V, and the voltage V of the signal of the first power endddGenerally 4.6V, so that driving transistor is in just
To under bias, driving transistor may be at off state or can also in the first light emitting phase and the second light emitting phase at this time
With the state in the very small electric current of output, so that pixel shows most black picture.Since driving transistor is in forward bias
Under, characteristic is not easy to restore, and above-mentioned pixel circuit provided in an embodiment of the present invention passes through the work of coupled capacitor in coupling stages
With, make drive transistor the first pole voltage improve, can to avoid driving transistor be chronically under forward bias, give drive
The time of the recovery of dynamic transistor characteristic, and then can make to drive the threshold voltage shift of transistor and mobility change very fast
Restore normal.
In addition, it is necessary to explanation, when driving transistor to be in negative bias certain time length, due to preparation process, material
The factors such as material, characteristic deviation degree is very small, and the characteristic drift can be ignored in allowable range of error, therefore accidentally
In poor allowed band, in coupling stages the effect of coupled capacitor in negative bias driving transistor characteristic substantially invariably
Good influence.
By taking the structure of pixel circuit shown in Fig. 3 as an example, using shown in Fig. 5 a to Fig. 5 c when the analogue simulation of each signal
Sequence figure carries out analogue simulation to the voltage of the first pole of driving transistor M0.Fig. 5 a is the signal of the first scanning signal end Scan1
Analogue simulation figure, Fig. 5 b be the second scanning signal end Scan2 signal analogue simulation figure, Fig. 5 c be LED control signal end
The analogue simulation figure of the signal of Emit, Fig. 5 d are the analogue simulation figure for driving the voltage of the first pole of transistor M0.Fig. 5 a extremely
In Fig. 5 d, ordinate represents voltage, and abscissa represents the time.Part in Fig. 5 c in dashed rectangle in dashed rectangle in Fig. 5 d
Part it is corresponding, it can be seen that when at LED control signal end, the signal of Emit becomes high potential from low potential, drive crystal
The voltage of the first pole of pipe M0 is elevated, therefore above-mentioned pixel circuit provided in an embodiment of the present invention can be to avoid driving transistor
For a long time under forward bias, the time of the recovery of drive transistor characteristics has been given, and then the threshold for driving transistor can be made
Threshold voltage drift and mobility change can comparatively fast restore normal.
Based on the same inventive concept, above-mentioned provided in an embodiment of the present invention is used the embodiment of the invention also provides a kind of
A kind of driving method of pixel circuit, as shown in Figure 6, comprising:
S601, initial phase, compensating module initialize driving transistor with luminescent device；
S602, data write phase, compensating module write the signal of data signal end and the threshold voltage of driving transistor
Enter to drive the control electrode of transistor；
S603, the first light emitting phase, the first transistor, second transistor and driving transistor in drive module are led
Logical, driving luminescent device shines；
The signal at LED control signal end is coupled to the of driving transistor by S604, coupling stages, coupling control module
One pole.
Above-mentioned driving method provided in an embodiment of the present invention can improve the characteristic of driving transistor, make to drive transistor
Threshold voltage shift and mobility change comparatively fast restore normally, to avoid display abnormal, improve the stability of display.
It in the specific implementation, include coupling in coupling control module in above-mentioned driving method provided in an embodiment of the present invention
When closing capacitor, coupling stages can specifically include: the signal of the high potential at LED control signal end is couple drive by coupled capacitor
First pole of dynamic transistor, to improve the voltage of the first pole of driving transistor.
It in the specific implementation,, can be with after coupling stages in above-mentioned driving method provided in an embodiment of the present invention
It include: the second light emitting phase；The first transistor, second transistor and driving in the second light emitting phase, drive module is brilliant
The conducting of body pipe, driving luminescent device shine.
It in the specific implementation, can be with respectively in data write phase and the first light emitting phase and the second light emitting phase
It charges under the signal at luminous signal end and the co- controlling of the signal of the first end of driving transistor including coupling control module.
In the specific implementation, it is specifically included in compensating module: initialization submodule, data write-in submodule, storage submodule
When block and compensation control submodule, in above-mentioned driving method provided in an embodiment of the present invention, initial phase specifically can be with
Include: initialization submodule under the control at the first scanning signal end respectively to driving transistor control electrode and luminescent device
First end is initialized, to discharge sub-module stored.Data write phase can specifically include: submodule is written in data
The signal of data signal end is supplied to the first pole of driving transistor by block under the control at the second scanning signal end；Compensation control
Control electrode and the second pole of driving transistor is connected in submodule under the control at the second scanning signal end, makes to drive transistor turns
It charges to sub-module stored.
In the specific implementation, it is specifically included in compensating module: initialization submodule, data write-in submodule, storage submodule
When block and compensation control submodule, in above-mentioned driving method provided in an embodiment of the present invention, the first light emitting phase can be with
It include: that sub-module stored keeps the voltage difference between the control electrode and the first power end of driving transistor to stablize；
It can also include: that sub-module stored is kept between the control electrode and the first power end that drive transistor in coupling stages
Voltage difference stablize.
In the specific implementation, it is specifically included in compensating module: initialization submodule, data write-in submodule, storage submodule
When block and compensation control submodule, in above-mentioned driving method provided in an embodiment of the present invention, the second light emitting phase can be with
It include: that sub-module stored keeps the voltage difference between the control electrode and the first power end of driving transistor to stablize.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display panels, as shown in fig. 7, comprises this hair
Any of the above-described kind of pixel circuit that bright embodiment provides.The principle that the display panel solves the problems, such as is similar to aforementioned pixel circuit,
Therefore the implementation of the display panel may refer to the implementation of aforementioned pixel circuit, and repeating place, details are not described herein.And for
Other essential component parts of the display panel are it will be apparent to an ordinarily skilled person in the art that having, herein
It does not repeat them here, should not be taken as limiting the invention yet.
In the specific implementation, above-mentioned display panel provided in an embodiment of the present invention is organic light emitting display panel.In reality
When production preparation, it is laid out (Layout) on underlay substrate generally to form above-mentioned display surface provided in an embodiment of the present invention
Plate, the coupled capacitor in pixel circuit can be arranged in domain in any way in the case where the space Layout allows, and
And the capacitance of the coupled capacitor of setting is the bigger the better.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display devices, including the embodiment of the present invention to mention
The above-mentioned display panel supplied.The display device can be with are as follows: mobile phone, tablet computer, television set, display, laptop, number
Any products or components having a display function such as photo frame, navigator.For other essential compositions of the display device
Part is it will be apparent to an ordinarily skilled person in the art that having, and this will not be repeated here, also should not be used as to of the invention
Limitation.The implementation of the display device may refer to the embodiment of above-mentioned pixel circuit, and overlaps will not be repeated.
Pixel circuit, its driving method, display panel and display device provided in an embodiment of the present invention, comprising: coupling control
Molding block, drive module, compensating module and luminescent device；Wherein, the drive module is for driving luminescent device to shine and wrap
It includes: driving transistor, the first transistor and second transistor；The control electrode of the first transistor and LED control signal end phase
Even, the first pole of the first transistor is connected with the first power end, the second pole of the first transistor and the first pole of driving transistor
It is connected；The control electrode of second transistor is connected with LED control signal end, the first pole and the driving transistor of second transistor
Second is extremely connected, and the second pole of second transistor is connected with the first end of luminescent device；The second end of luminescent device and the second electricity
Source is connected；Coupling control module is used to couple the signal at LED control signal end to the first pole of driving transistor；Compensation
Module is used to carry out driving transistor and luminescent device initialization and by the signal of data signal end and driving transistor
The control electrode of threshold voltage write driver transistor.Therefore, the embodiment of the present invention passes through the mutual of above-mentioned each module and transistor
Cooperation can drive luminescent device to shine, and can believe light emitting control just because of coupling control module in coupling stages
Number end signal be coupled to driving transistor the first pole so that driving the first pole of transistor voltage improve, can be to avoid drive
Dynamic transistor is chronically under forward bias, the time for having given drive transistor characteristics to restore, to make the threshold for driving transistor
Threshold voltage drift and mobility change are comparatively fast restored normally, and then avoid display abnormal, improve exhibit stabilization.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (14)
1. a kind of pixel circuit characterized by comprising coupling control module, drive module, compensating module and photophore
Part；
The drive module includes: driving transistor, the first transistor and second transistor；The control of the first transistor
Pole is connected with LED control signal end, and the first pole of the first transistor is connected with the first power end, the first transistor
The second pole and the driving transistor first be extremely connected；The control electrode of the second transistor and the LED control signal
End is connected, and the first pole of the second transistor drives second being extremely connected for transistor with described, and the of the second transistor
Two poles are connected with the first end of the luminescent device；The second end of the luminescent device is connected with second source end；The driving
Module is for driving the luminescent device to shine；
The coupling control module is extremely connected with the first of the LED control signal end and the driving transistor respectively, uses
In the first pole for coupling the signal at the LED control signal end in the driving transistor；The coupling control module includes
Coupled capacitor；Wherein, the first end of the coupled capacitor is connected with the LED control signal end, and second end and the driving are brilliant
The first of body pipe is extremely connected；
The compensating module is connected with the driving transistor, for carrying out just to the driving transistor and the luminescent device
Beginningization and the control that the threshold voltage of the signal of data signal end and the driving transistor is written to the driving transistor
Pole.
2. pixel circuit as described in claim 1, which is characterized in that the compensating module includes: initialization submodule, data
Submodule, sub-module stored and compensation control submodule is written；Wherein,
The initialization submodule respectively with the first scanning signal end, initializing signal end, it is described driving transistor control electrode
And the first end of the luminescent device is connected, for brilliant to the driving respectively under the control at first scanning signal end
The control electrode of body pipe and the first end of the luminescent device are initialized；
Data write-in submodule respectively with the second scanning signal end, the data signal end and the driving transistor
First is extremely connected, for the signal of the data signal end to be supplied to the drive under the control at second scanning signal end
First pole of dynamic transistor；
The compensation control submodule respectively with second scanning signal end, the driving control electrode of transistor and described
The second of transistor is driven extremely to be connected, for the control of the driving transistor to be connected under the control at second scanning signal end
Pole processed and the second pole；
The sub-module stored is connected with the control electrode of first power end and the driving transistor respectively, in institute
It states and carries out charge or discharge under the co- controlling of the signal of the control electrode of the first power end and the driving transistor, and in institute
State the control electrode for driving the control electrode of transistor to keep the driving transistor when being in floating and first power end
Between voltage difference stablize.
3. pixel circuit as claimed in claim 2, which is characterized in that the initialization submodule include: third transistor with
4th transistor；
The control electrode of the third transistor is connected with first scanning signal end, the first pole and initializing signal end phase
Even, the second pole is connected with the control electrode of the driving transistor；
The control electrode of 4th transistor is connected with first scanning signal end, the first pole and initializing signal end phase
Even, the second pole is connected with the first end of the luminescent device.
4. pixel circuit as claimed in claim 3, which is characterized in that the data write-in submodule includes: the 5th transistor；
The control electrode of 5th transistor is connected with second scanning signal end, the first pole of the 5th transistor and institute
It states data signal end to be connected, the second pole of the 5th transistor is extremely connected with the first of the driving transistor.
5. pixel circuit as claimed in claim 3, which is characterized in that the compensation control submodule includes: the 6th transistor:
The control electrode of 6th transistor is connected with second scanning signal end, the first pole of the 6th transistor and institute
State driving transistor second is extremely connected, and the second pole of the 6th transistor is connected with the control electrode of the driving transistor.
6. pixel circuit as claimed in claim 3, which is characterized in that the sub-module stored includes: storage capacitance；
The first end of the storage capacitance is connected with first power end, the control electrode phase of second end and the driving transistor
Even.
7. pixel circuit as claimed in any one of claims 1 to 6, which is characterized in that all transistors are P-type transistor.
8. a kind of display panel, which is characterized in that including such as described in any item pixel circuits of claim 1-7.
9. a kind of display device, which is characterized in that including display panel as claimed in claim 8.
10. a kind of driving method using such as the described in any item pixel circuits of claim 1-7 characterized by comprising
Initial phase, the compensating module initialize the driving transistor with the luminescent device；
The threshold voltage of the signal of data signal end and the driving transistor is written for data write phase, the compensating module
The control electrode of the driving transistor；
First light emitting phase, the first transistor, the second transistor and the driving in the drive module are brilliant
The conducting of body pipe, drives the luminescent device to shine；
The signal at the LED control signal end is coupled to the driving transistor by coupling stages, the coupling control module
First pole.
11. driving method as claimed in claim 10, which is characterized in that in the coupling control module include coupled capacitor
When, the coupling stages specifically include: the coupled capacitor couples the signal of the high potential at the LED control signal end to
First pole of the driving transistor, to improve the voltage of the first pole of the driving transistor.
12. driving method as claimed in claim 10, which is characterized in that the initial phase specifically includes: initial beggar
Module is under the control at the first scanning signal end respectively to the control electrode and the first of the luminescent device of the driving transistor
End is initialized, to discharge sub-module stored；
The data write phase specifically includes: submodule is written under the control at the second scanning signal end by the data in data
The signal of signal end is supplied to the first pole of the driving transistor；Control submodule is compensated at second scanning signal end
The control electrode of the lower conducting driving transistor of control and the second pole, make the driving transistor turns to the sub-module stored
Charging；
First light emitting phase further include: the sub-module stored keeps the control electrode and described first of the driving transistor
Voltage difference between power end is stablized；
In the coupling stages further include: the sub-module stored keeps the control electrode of the driving transistor and first electricity
Voltage difference between source is stablized.
13. such as the described in any item driving methods of claim 10-12, which is characterized in that after the coupling stages, also wrap
It includes: the second light emitting phase；
The first transistor, the second transistor in second light emitting phase, the drive module and described
Transistor turns are driven, the luminescent device is driven to shine.
14. driving method as claimed in claim 13, which is characterized in that second light emitting phase further include: storage submodule
Block keeps the voltage difference between the control electrode and first power end of the driving transistor to stablize.
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| CN108470538A (en) * | 2018-05-31 | 2018-08-31 | 昆山国显光电有限公司 | Pixel circuit and its driving method |
| CN111354314A (en) * | 2020-03-16 | 2020-06-30 | 昆山国显光电有限公司 | Pixel circuit, driving method of pixel circuit and display panel |
| CN111739476B (en) * | 2020-06-16 | 2021-10-26 | 昆山国显光电有限公司 | Shift register and display panel |
| CN111710298B (en) * | 2020-06-28 | 2022-01-25 | 云谷（固安）科技有限公司 | Pixel circuit, driving method thereof and display panel |
| CN113066439B (en) * | 2021-03-30 | 2022-11-29 | 京东方科技集团股份有限公司 | Pixel circuit, driving method, electroluminescent display panel and display device |
| CN114514573B (en) * | 2021-07-30 | 2022-08-09 | 京东方科技集团股份有限公司 | Pixel circuit, driving method and display device |
| CN113990262B (en) * | 2021-11-18 | 2023-03-21 | 武汉天马微电子有限公司 | Pixel circuit, display panel and display device |
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| CN106531076A (en) * | 2017-01-12 | 2017-03-22 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and driving method thereof |
| CN106782332A (en) * | 2017-01-19 | 2017-05-31 | 上海天马有机发光显示技术有限公司 | Organic electroluminescence display panel and its driving method, organic light-emitting display device |
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| CN1490779A (en) * | 2002-06-11 | 2004-04-21 | ����Sdi��ʽ���� | Luminous display device, luminous display board and driving method thereof |
| CN105427803A (en) * | 2016-01-04 | 2016-03-23 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method thereof, display panel and display device |
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