CN109903724A - The driving method and display panel of a kind of pixel circuit, pixel circuit - Google Patents
The driving method and display panel of a kind of pixel circuit, pixel circuit Download PDFInfo
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- CN109903724A CN109903724A CN201910357690.9A CN201910357690A CN109903724A CN 109903724 A CN109903724 A CN 109903724A CN 201910357690 A CN201910357690 A CN 201910357690A CN 109903724 A CN109903724 A CN 109903724A
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Abstract
The invention discloses a kind of pixel circuits, the driving method and display panel of pixel circuit.The pixel circuit includes data voltage writing module, driving transistor, light emitting module, memory module, the first transistor and electric leakage compensating module.Data voltage writing module is used to that data voltage to be written to driving transistor.The first transistor is electrically connected with the grid of driving transistor, and the first transistor is compensation transistor or reset transistor.Memory module is electrically connected with driving transistor, the grid voltage for storage driving transistor.Electric leakage compensating module is electrically connected with the grid of transistor is driven, for compensating the current potential of driving transistor gate.Transistor is driven to be used to drive light emitting module to shine according to its grid voltage output drive signal.When voltage is written in the grid for driving transistor, electric leakage compensating module carries out electric leakage compensation to the grid of driving transistor, it is possible to reduce the residence time of display panel previous frame ghost, improves the ghost phenomena of display panel.
Description
Technical field
The present embodiments relate to field of display technology more particularly to the driving methods of a kind of pixel circuit, pixel circuit
And display panel.
Background technique
Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display panel is in display process
In, since the time that the grid voltage of the driving transistor of different pixel circuits is written to data voltage is different, lead to display surface
When plate carries out screen switching, a picture before switching will not disappear at once, but as next picture slowly disappears, so that
There are short-term ghost phenomenas in OLED display panel.And it is short to drive the leakage phenomenon of transistor gate to make in pixel circuit
Phase ghost phenomena is more obvious, has seriously affected display effect.
Summary of the invention
The present invention provides the driving method and display panel of a kind of pixel circuit, pixel circuit, to improve display panel
Ghost phenomena.
In a first aspect, the embodiment of the invention provides a kind of pixel circuit, including data voltage writing module, driving crystal
Pipe, light emitting module, memory module, the first transistor and electric leakage compensating module；
The data voltage writing module is used to that data voltage to be written to the driving transistor；
The first transistor is electrically connected with the grid of the driving transistor, and the first transistor is compensation transistor
Or reset transistor；
The memory module is electrically connected with the driving transistor, for storing the grid voltage of the driving transistor；
The electric leakage compensating module is electrically connected with the grid of the driving transistor, for compensating the driving transistor gate
The current potential of pole；
The driving transistor is used to drive the light emitting module to shine according to its grid voltage output drive signal.
Optionally, the first transistor is compensation transistor；The data voltage writing module includes second transistor,
The light emitting module includes light emitting diode, and the memory module includes first capacitor, and the electric leakage compensating module includes third
Transistor；The pixel circuit further includes the 4th transistor, the 5th transistor and first control signal input terminal；
First scanning of the grid of the grid of the second transistor and the first transistor and the pixel circuit is believed
The electrical connection of number input terminal, the first pole of the second transistor and the first pole of the third transistor and the pixel circuit
Data signal input electrical connection, the first pole and described the of the second pole of the second transistor and the driving transistor
First pole of four transistors is electrically connected；
The of second pole of the driving transistor and the second pole of the first transistor and the 5th transistor
The electrical connection of one pole, the second pole of the 5th transistor are electrically connected with the first pole of the light emitting diode, the driving crystal
The first pole, the first pole of the first transistor and the second pole of the third transistor of the grid of pipe and the first capacitor
Electrical connection；First power supply of the second pole of the first capacitor and the second pole of the 4th transistor and the pixel circuit is believed
The electrical connection of number input terminal；The grid of the third transistor is electrically connected with the first control signal input terminal；
The light emitting control of the grid of 4th transistor and the grid of the 5th transistor and the pixel circuit is believed
The electrical connection of number input terminal；
Second pole of the light emitting diode is electrically connected with the second source signal input part of the pixel circuit.
Optionally, the first transistor is reset transistor；The data voltage writing module includes second transistor,
The light emitting module includes light emitting diode, and the memory module includes first capacitor, and the electric leakage compensating module includes third
Transistor；The pixel circuit further includes the 4th transistor, the 5th transistor, the 6th transistor and first control signal input
End；
First scanning of the grid of the grid of the second transistor and the 6th transistor and the pixel circuit is believed
The electrical connection of number input terminal, the first pole of the second transistor and the first pole of the third transistor and the pixel circuit
Data signal input electrical connection, the first pole and described the of the second pole of the second transistor and the driving transistor
First pole of four transistors is electrically connected；Second pole of the 4th transistor and the second pole of the first capacitor and the pixel
First power supply signal input of circuit is electrically connected；
The of second pole of the driving transistor and the first pole of the 5th transistor and the 6th transistor
The electrical connection of two poles, the grid of the driving transistor and the first pole of the first capacitor, the 6th transistor the first pole,
First pole of the first transistor and the second pole electrical connection of the third transistor；Second pole of the first transistor
It is electrically connected with the reference voltage signal input terminal of the pixel circuit, the grid of the first transistor and the pixel circuit
The electrical connection of second scanning signal input terminal；The grid of the third transistor is electrically connected with the first control signal input terminal；
The light emitting control of the grid of 4th transistor and the grid of the 5th transistor and the pixel circuit is believed
The electrical connection of number input terminal；Second pole of the 5th transistor is electrically connected with the first pole of the light emitting diode, described to shine
Second pole of diode is electrically connected with the second source signal input part of the pixel circuit.
Optionally, the turn-on time of the third transistor is less than the turn-on time of the second transistor, the third
Transistor is connected during the second transistor is connected.
Optionally, the absolute value of the first control signal level of first control signal input terminal input is greater than described the
The absolute value of first scanning signal level of scan signal input terminal input.
Optionally, pixel circuit further includes the 7th transistor and first voltage signal input part；The first transistor is
Double-gated transistor；
The first transistor includes the first sub- transistor and the second sub- transistor；The first grid of the first sub- transistor
The electrical connection of the second grid of pole and the second sub- transistor, and the grid as the first transistor；First son is brilliant
First pole of the extremely described the first transistor of the first of body pipe, the second pole of the first sub- transistor and the described second sub- crystal
First pole of pipe is electrically connected；Second pole of the second extremely described the first transistor of the second sub- transistor；
The of first pole of the 7th transistor and the second pole of the first transistor or the first sub- transistor
The electrical connection of two poles, the second pole of the 7th transistor is electrically connected with the first voltage signal input part；7th crystal
The grid of pipe is electrically connected with the third scanning signal input terminal of the pixel circuit.
Optionally, pixel circuit further includes the 8th transistor and second control signal input terminal；The first transistor is
Double-gated transistor；
The first transistor includes the first sub- transistor and the second sub- transistor；The first grid of the first sub- transistor
The electrical connection of the second grid of pole and the second sub- transistor, and the grid as the first transistor；First son is brilliant
First pole of the extremely described the first transistor of the first of body pipe, the second pole of the first sub- transistor and the described second sub- crystal
First pole of pipe is electrically connected by the 8th transistor；The second extremely described the first transistor of the second sub- transistor
Second pole；
First pole of the 8th transistor is electrically connected with the second pole of the described first sub- transistor, the 8th transistor
The second pole be electrically connected with the first pole of the described second sub- transistor, the grid of the 8th transistor and it is described second control believe
The electrical connection of number input terminal.
Optionally, pixel circuit further includes zener diode；
First pole of the first transistor is electrically connected by the zener diode with the grid of the driving transistor；
Wherein, the anode of the zener diode is electrically connected with the first pole of the first transistor, the cathode of the zener diode
It is electrically connected with the grid of the driving transistor.
Second aspect, the embodiment of the invention also provides a kind of display panels, provide including any embodiment of that present invention
Pixel circuit.
The third aspect, the embodiment of the invention also provides a kind of driving method of pixel circuit, the pixel circuit includes
Data voltage writing module, driving transistor, light emitting module, memory module, the first transistor and electric leakage compensating module, described the
One transistor is electrically connected with the grid of the driving transistor；The driving method of the pixel circuit includes:
Data write phase, data voltage is written to the driving transistor in the data voltage writing module, described to deposit
Storage module stores the voltage of the driving transistor gate；
Leak electricity compensated stage, and the electric leakage compensating module compensates the current potential of the driving transistor gate；The electric leakage is mended
Repaying the stage is located in the data write phase, the duration of the electric leakage compensated stage be less than the data write phase when
It is long；
Light emitting phase, the driving transistor drive the light emitting module to send out according to its grid voltage output drive signal
Light.
The technical solution of the embodiment of the present invention, plain circuit includes data voltage writing module, driving transistor, shine mould
Block, memory module, the first transistor and electric leakage compensating module.When voltage is written in the grid for driving transistor, electric leakage compensation mould
Block carries out electric leakage compensation to the grid of driving transistor, makes the data electricity for driving the grid quick charge of transistor to present frame
Pressure reduces the charging time that driving transistor gate charges to the data voltage of present frame, to reduce on display panel
The residence time of one frame data voltage, and then reduce the residence time of display panel previous frame ghost, improve display panel
Ghost phenomena.Meanwhile it can be to avoid the inconsistent caused driving crystalline substance of current potential for driving transistor gate in different pixels circuit
Body pipe is that the driving current that light emitting diode provides is different, and then keeps lumination of light emitting diode brightness in different pixels circuit different
The problem of, improve the homogeneity of display panel.
Detailed description of the invention
Fig. 1 is a kind of electrical block diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of timing diagram of the pixel circuit of corresponding diagram 1；
Fig. 3 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 4 is a kind of timing diagram of the pixel circuit of corresponding diagram 3；
Fig. 5 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 6 is a kind of timing diagram of the pixel circuit of corresponding diagram 5；
Fig. 7 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 8 is a kind of timing diagram of the pixel circuit of corresponding diagram 7；
Fig. 9 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Figure 10 is a kind of timing diagram of the pixel circuit of corresponding diagram 9；
Figure 11 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Figure 12 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Figure 13 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention；
Figure 14 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention；
Figure 15 is a kind of flow chart of the driving method of pixel circuit provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
In the prior art, OLED display panel is during display, due to pixel circuit different in OLED display panel
The initial gate-source voltage of middle driving transistor is different, and the grid voltage of the driving transistor of different pixel circuits is written to data electricity
The time of pressure is different, and when display panel being caused to carry out screen switching, a picture before switching will not disappear at once, but with
Next picture slowly disappears, so that there are short-term ghost phenomenas in OLED display panel.Under normal circumstances, in pixel circuit
The grid of driving transistor there are leakage phenomenons, in data write phase, leakage phenomenon makes the grid for driving transistor
The time that current potential is written to data voltage is long, so that the ghost of the display panel remaining time is longer, ghost phenomena is more
Add obvious.There are many reason of driving the grid of transistor to generate leakage current, for example, when pixel circuit includes threshold compensation crystal
Guan Shi, threshold compensation strings of transistors are associated between the grid and drain electrode of driving transistor.In the threshold compensation stage, threshold compensation is brilliant
The conducting of body pipe compensates the threshold voltage of the driving transistor after write-in data voltage, while threshold compensation transistor sheet
Body is there are leakage phenomenon so that the time of gate charges to the data voltage of driving transistor is long, display panel it is residual
The shadow remaining time is longer, and ghost phenomena is more obvious.Under normal circumstances, after determining driving transistor, transistor is driven
Grid potential and charging time are a curve, therefore drive the time of gate charges to the data voltage of transistor that can determine.
When driving the grid of transistor to pass through threshold compensation transistor drain current, drive the gate charges of transistor to data voltage
Time, which is greater than on curve, drives the gate charges of transistor to the data voltage corresponding time, therefore the ghost residual of display panel
Time it is longer.Similarly, when pixel circuit includes reset transistor, the drain electrode of reset transistor and the grid of driving transistor
Electrical connection, the source electrode of reset transistor are electrically connected with the reference voltage signal input terminal of pixel circuit.In reset transistor to drive
After the grid of dynamic transistor is resetted, reset transistor cut-off, when data voltage is written in the grid for driving transistor, driving
The grid voltage of transistor is leaked electricity in the form of leakage current reset transistor, again such that the ghost of display panel is remaining
Time is longer, and ghost phenomena is more obvious.
In view of the above-mentioned problems, the embodiment of the present invention proposes a kind of pixel circuit, to improve the homogeneity that display panel is shown,
Improve ghost phenomena.
Pixel circuit provided in an embodiment of the present invention includes data voltage writing module, driving transistor, light emitting module, deposits
Store up module, the first transistor and electric leakage compensating module.Data voltage writing module is used to that data voltage to be written to driving transistor.
The first transistor is electrically connected with the grid of driving transistor, and the first transistor is compensation transistor or reset transistor.Store mould
Block is electrically connected with driving transistor, the grid voltage for storage driving transistor.Leak electricity compensating module and driving transistor
Grid electrical connection, for compensating the current potential of driving transistor gate.Transistor is driven to be used for according to its grid voltage output driving
Signal drives light emitting module to shine.
Specifically, the first transistor is electrically connected with the grid of driving transistor, when the first transistor is compensation transistor,
Compensated data voltage is written to the grid of driving transistor in the first transistor.When first today was reset transistor, the
Resetting voltage is written to the grid of driving transistor in one transistor.When voltage is written in the grid of driving transistor, electric leakage is mended
It repays module and electric leakage compensation is carried out to the grid of driving transistor, make the data for driving the grid quick charge of transistor to present frame
Voltage reduces the charging time that driving transistor gate charges to the data voltage of present frame, to reduce display panel
The residence time of previous frame data voltage, and then reduce the residence time of display panel previous frame ghost, improve display surface
The ghost phenomena of plate.Meanwhile it can be to avoid the inconsistent caused driving of current potential for driving transistor gate in different pixels circuit
Transistor is that the driving current that provides of light emitting diode is different, and then makes in different pixels circuit lumination of light emitting diode brightness not
Same problem, improves the homogeneity of display panel.
Illustratively, Fig. 1 is a kind of electrical block diagram of pixel circuit provided in an embodiment of the present invention, such as Fig. 1 institute
Show, the first transistor T1 is compensation transistor, and data voltage writing module 10 includes second transistor T2, and light emitting module 20 includes
Light emitting diode D1, memory module 30 include first capacitor C1, and electric leakage compensating module 40 includes third transistor T3, pixel circuit
It further include the 4th transistor T4, the 5th transistor T5 and first control signal input terminal Ctrl1.
First scanning signal input terminal of the grid of second transistor T2 and the grid of the first transistor T1 and pixel circuit
The data-signal of Scan1 electrical connection, the first pole of second transistor T2 and the first pole of third transistor T3 and pixel circuit is defeated
Enter Vdata is held to be electrically connected, the first pole and the 4th transistor T4 of the second pole of second transistor T2 and driving transistor Tdr
The electrical connection of first pole.Drive the of the second pole of transistor Tdr and the second pole of the first transistor T1 and the 5th transistor T5
The electrical connection of one pole, the second pole of the 5th transistor T5 are electrically connected with the first pole of light emitting diode D1, drive the grid of transistor Tdr
Pole is electrically connected with the second pole of the first pole of first capacitor C1, the first pole of the first transistor T1 and third transistor T3, and first
The second pole and the second pole of the 4th transistor T4 of capacitor C1 and the first power supply signal input Vdd of pixel circuit are electrically connected,
The grid of third transistor T3 is electrically connected with first control signal input terminal Ctrl1, the grid of the 4th transistor T4 and the 5th crystalline substance
The grid of body pipe T5 is electrically connected with the LED control signal input terminal E1 of pixel circuit.The second pole of light emitting diode D1 and pixel
The second source signal input part Vss of circuit is electrically connected.
Fig. 2 is a kind of timing diagram of the pixel circuit of corresponding diagram 1.Now in conjunction with Fig. 1 and Fig. 2, with pixel circuit described in Fig. 1
In transistor be P row transistor for, illustrate the working principle of the pixel circuit.
With reference to the timing for the first scanning signal that Fig. 2, scan1 are the first scanning signal input terminal Scan1 input, ctrl1
For the timing of the first control signal of first control signal input terminal Ctrl1 input, e1 is that LED control signal input terminal E1 is defeated
The timing of the first LED control signal entered.
T11 in the first stage, scan1 are low level, and e1 is high level.The first transistor T1 and second transistor T2 are led
Logical, data voltage is written by second transistor T2 and the first transistor T1 to the grid of driving transistor Tdr, and passes through first
Capacitor C1 stores data voltage.Until the grid potential of driving transistor Tdr is vdata+vth, transistor Tdr is driven
Cut-off.Vth therein is the threshold voltage for driving transistor Tdr.Therefore, in the first write phase t11, pixel circuit is completed
The write-in of data voltage and the threshold compensation for driving transistor Tdr.
In the first stage during t11, ctrl1 includes the low level stage, and there are conducting phases by third transistor T3.Third is brilliant
The turn-on time of body pipe T3 is less than the turn-on time of second transistor T2, and third transistor T3 is during second transistor T2 is connected
Conducting.In third transistor T3 conducting, data voltage is write direct by third transistor T3 to the grid of driving transistor Tdr
Pole makes the compensated data voltage of grid no write de-lay present frame for driving transistor Tdr, driving transistor Tdr cut-off.It reduces
Driving transistor gate Tdr charges to the charging time of the compensated data voltage of present frame, to reduce display panel
The residence time of previous frame data voltage, and then reduce the residence time of display panel previous frame ghost, improve display surface
The ghost phenomena of plate.
With continued reference to Fig. 2, the ctrl1 low level stage can be the final stage of first stage t11, i.e. ctrl1 and scan1
High level is changed by low level simultaneously, therefore can determine that ctrl1 is jumped by low level as height by the jumping moment of scan1
At the time of level, so that control ctrl1 timing is more easier.
In addition, ctrl1 low level start time with driving transistor Tdr grid potential according to the curve phase of time change
It closes.After driving transistor Tdr to determine, driving the theoretical value of transistor Tdr grid potential according to the curve of time change is the
One curve.When driving transistor Tdr grid is there are when leakage current, the actual value of driving transistor Tdr grid potential is according to the time
The curve of variation is the second curve.When third transistor T3 conducting, the current potential of driving transistor Tdr grid passes through third crystal
The value of pipe T3 charging and the curve of time change are third curve.At the end of for t11 in the first stage, transistor Tdr is driven
The current potential of grid reaches ideal potential (as vdata+vth), and third curve compensates exactly for the difference of the second curve and the first curve
Value, so that the grid potential of driving transistor Tdr passes through third transistor T3 quick charge to driving transistor Tdr grid potential
Theoretical value, can both make drive transistor Tdr grid quick charge to the compensated data voltage of present frame, reduce drive
The charging time for the data voltage that dynamic transistor Tdr gate charges to present frame compensates, to reduce display panel previous frame
The residence time of data voltage, and then reduce the residence time of display panel previous frame ghost, improve the residual of display panel
Shadow phenomenon.Meanwhile it can be to avoid the inconsistent caused driving crystal of current potential for driving transistor Tdr grid in different pixels circuit
Pipe Tdr is that the driving current that light emitting diode D1 is provided is different, and then makes light emitting diode D1 luminance in different pixels circuit
Different problems are spent, the homogeneity of display panel is improved.
Under normal circumstances, the first control signal ctrl1 level of first control signal input terminal Ctrl1 input can be set
Absolute value be greater than the first scanning signal input terminal Scan1 input the first scanning signal scan1 level absolute value so that the
Turn on process and cut-off of the turn on process and procedures of turn-off of three transistor T3 than the first transistor T1 and second transistor T2
Process is fast so that third transistor T3 can fast conducting charge to the grid of driving transistor Tdr, and can
Quickly end after charging.
It is high level in second stage t12, scan1, ctrl1 is high level, and e1 is low level.The first transistor T1,
Two-transistor T2 and third transistor T3 cut-off, the 4th transistor T4 and the 5th transistor T5 conducting.Drive the source of transistor Tdr
Extremely become the first power supply signal vdd, driving transistor Tdr conducting, driving transistor Tdr output driving current to light-emitting diodes
Pipe D1, light emitting diode D1 shine according to driving current.
It continues to refer to figure 1, the first transistor T1 can be double-gated transistor.The first transistor T1 includes the first sub- transistor
The sub- transistor T12 of T11 and second.The second grid of the first grid of first sub- transistor T11 and the second sub- transistor T12 are electrically connected
It connects, and the grid as the first transistor T1, extremely the first pole of the first transistor T1 of the first of the first sub- transistor T11, the
The second pole of one sub- transistor T11 is electrically connected with the first pole of the second sub- transistor T12, the second pole of the second sub- transistor T12
For the second pole of the first transistor T1.It is double-gated transistor by setting the first transistor T1, can reduce driving transistor Tdr
Grid pass through the leakage current of the first transistor T1.
Fig. 3 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.As shown in figure 3, pixel
Circuit further includes the 7th transistor T7.
The first transistor T1 is double-gated transistor, and the first transistor T1 includes the first sub- sub- crystal of transistor T11 and second
Pipe T12.The electrical connection of the second grid of the first grid of first sub- transistor T11 and the second sub- transistor T12, and as the first crystalline substance
The grid of body pipe T1, extremely the first pole of the first transistor T1 of the first of the first sub- transistor T11, the first sub- transistor T11's
Second pole is electrically connected with the first pole of the second sub- transistor T12, the second extremely the first transistor T1's of the second sub- transistor T12
Second pole.The first pole of 7th transistor T7 is electrically connected with the second pole of the first sub- transistor T11, and the second of the 7th transistor T7
Pole is electrically connected with first voltage signal input part V1, and the grid of the 7th transistor T7 and the third scanning signal of pixel circuit input
Hold Scan3 electrical connection.
Fig. 4 is a kind of timing diagram of the pixel circuit of corresponding diagram 3.Now in conjunction with Fig. 3 and Fig. 4, with pixel circuit described in Fig. 3
In transistor be P row transistor for, illustrate the working principle of the pixel circuit.
Scan1 is the timing of the first scanning signal of the first scanning signal input terminal Scan1 input, and scan3 sweeps for third
The timing of the third scanning signal of signal input part Scan3 input is retouched, ctrl1 is first control signal input terminal Ctrl1 input
First control signal timing, e1 be LED control signal input terminal E1 input the first LED control signal timing.
T21 in the first stage, scan1 are low level, and scan3 is high level, and e1 is high level.The first transistor T1 and
Two-transistor T2 conducting, data-signal are written by second transistor T2 and the first transistor T1 to the grid of driving transistor Tdr
Pole, and data-signal is stored by first capacitor C1.Until the grid potential of driving transistor Tdr is vdata+vth,
Drive transistor Tdr cut-off.Vth therein is the threshold voltage for driving transistor Tdr.Therefore, t11 in the first stage, pixel
Circuit completes the write-in of data voltage and drives the threshold compensation of transistor Tdr.
Similarly, in the first stage during t21, ctrl1 includes the low level stage, and there are conducting phases by third transistor T3.
The turn-on time of third transistor T3 is less than the turn-on time of second transistor T2, and third transistor T3 is led in second transistor T2
Conducting during logical.Make the compensated data electricity of grid no write de-lay present frame for driving transistor Tdr by third transistor T3
Pressure, driving transistor Tdr cut-off.Reduce driving transistor gate Tdr and charges to filling for the compensated data voltage of present frame
The electric time, to reduce the residence time of display panel previous frame data voltage, and then it is residual to reduce display panel previous frame
The residence time of shadow improves the ghost phenomena of display panel.
It is high level in second stage t22, scan1, scan3 is low level, and ctrl1 is high level, and e1 is high level.The
One transistor T1, second transistor T2, third transistor T3, the 4th transistor T4 and the 5th transistor T5 cut-off, the 7th crystal
Pipe T7 conducting.First voltage signal input part V1 inputs the sub- transistor of first voltage signal v1 to first by the 7th transistor T7
The second pole A point of T11 keeps the second pole A point of the first sub- transistor T11 no longer hanging, and current potential is fixed as v1, so as to avoid
When the grid potential of the first transistor T1 changes, the second pole A point of the first sub- transistor T11 is because of current potential increase caused by hanging.
Under normal circumstances, first voltage signal v1 can be the current potential after driving transistor Tdr gate data write-in, i.e., in the first stage
The grid potential vdata+vth of transistor Tdr is driven at the end of t11.When first voltage signal v1 is written to the first sub- transistor
When the second pole A point of T11, the grid potential phase of the current potential and driving transistor Tdr of the second pole A point of the first sub- transistor T11
Deng, between the two without voltage difference, therefore can be to avoid in the second pole A point of the first sub- transistor T11 and driving transistor Tdr
Grid between form leakage current, and then can potential change caused by the grid due to leakage current to avoid driving transistor Tdr, make
The grid potential of driving transistor Tdr remains vdata+vth, can not only inhibit in different pixels circuit because driving transistor
The difference of the grid potential for the driving transistor Tdr that the grid leakage current of Tdr generates increases, and the ghost for improving display panel is existing
As.It can become larger simultaneously to avoid the difference for the driving signal for driving transistor Tdr output in different pixels circuit, so as to keep away
Exempt from the light emission luminance of light emitting diode D1 in different pixels circuit difference increase, be conducive to improve display panel show it is uniform
Property.
It should be noted that the pixel circuit in Fig. 3 is illustrated by taking P-type transistor as an example.When the crystalline substance in pixel circuit
When body pipe is N-type transistor, in the first stage when t21, scan1 is high level, and the first transistor T1 is connected, in the first stage
After t21, scan1 signal is to become low level from high level, and the parasitic capacitance of the first transistor T1 leads to the first son at this time
The current potential of the second pole A point of transistor T11 reduces.
It is high level in phase III t23, scan1, scan3 is high level, and ctrl1 is high level, and e1 is low level.The
One transistor T1, second transistor T2 third transistor T3 and the 7th transistor T7 cut-off, the 4th transistor T4 and the 5th crystal
Pipe T5 conducting.The source electrode of driving transistor Tdr is to become the first power supply signal vdd, and driving transistor Tdr conducting drives crystal
For pipe Tdr output drive signal to light emitting diode D1, light emitting diode D1 is luminous according to driving signal.
In addition, in other embodiments, the first of the 7th transistor T7 extremely can also be with the second pole of the first transistor T1
Electrical connection.When the 7th transistor T7 conducting, first voltage signal input part V1 inputs first voltage by the 7th transistor T7
The second pole of signal v1 to the first transistor T1.After first voltage signal v1 is to drive the write-in of transistor Tdr gate data
When current potential, there is no voltage difference between the second pole of the first transistor T1 and the grid for driving transistor Tdr, thus can to avoid
Leakage current is formed between the second pole of the first transistor T1 and the grid for driving transistor Tdr, and then can be to avoid driving crystal
Potential change caused by the grid due to leakage current of pipe Tdr can equally inhibit in different pixels circuit because driving transistor Tdr's
The difference of the grid potential for the driving transistor Tdr that grid leakage current generates increases, and improves the ghost phenomena of display panel.Together
When can be to avoid driving the difference of driving signal of transistor Tdr output become larger in different pixels circuit, so as to avoid not
Difference with the light emission luminance of light emitting diode D1 in pixel circuit increases, and is conducive to improve the homogeneity that display panel is shown.
Fig. 5 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.As shown in figure 5, pixel
Circuit further includes the 8th transistor T8 and second control signal input terminal Ctrl2.
The first transistor T1 is double-gated transistor.The first transistor T1 includes the first sub- sub- crystal of transistor T11 and second
Pipe T12.The electrical connection of the second grid of the first grid of first sub- transistor T11 and the second sub- transistor T12, and as the first crystalline substance
The grid of body pipe T1, extremely the first pole of the first transistor T1 of the first of the first sub- transistor T11, the first sub- transistor T11's
Second pole is electrically connected with the first pole of the second sub- transistor T12, the second extremely the first transistor T1's of the second sub- transistor T12
Second pole.The first pole of 8th transistor T8 is electrically connected with the second pole of the first sub- transistor T11, and the second of the 8th transistor T8
Pole is electrically connected with the first pole of the second sub- transistor T12, the grid and second control signal input terminal Ctrl2 of the 8th transistor T8
Electrical connection.
Fig. 6 is a kind of timing diagram of the pixel circuit of corresponding diagram 5.Now in conjunction with Fig. 5 and Fig. 6, with pixel circuit described in Fig. 5
In transistor be P row transistor for, illustrate the working principle of the pixel circuit.In Fig. 6, scan1 is the first scanning letter
The timing of first scanning signal of number input terminal Scan1 input, ctrl1 are the of first control signal input terminal Ctrl1 input
The timing of one control signal, ctrl2 are the timing of the first control signal of second control signal input terminal Ctrl2 input, and e1 is
The timing of first LED control signal of LED control signal input terminal E1 input.
T31 in the first stage, scan1 are low level, and ctrl2 is low level, and e1 is high level.8th transistor T8 is led
Logical, data voltage is written by second transistor T2, the first transistor T1 and the 8th transistor T8 to the grid of driving transistor Tdr
Pole, and data-signal is stored by first capacitor C1.Also, in the first stage during t31, ctrl1 includes low electricity
In the flat stage, detailed process is identical as the first stage t11 in Fig. 2, and details are not described herein again.
It is high level in second stage t32, scan1, ctrl2 is high level, and e1 is high level.The first transistor T1,
Two-transistor T2 and the 8th transistor T8 cut-off.Become the moment of high level from low level in scan1, the first transistor T1's posts
Raw capacitor causes the current potential of the second pole A point of the first sub- transistor T11 to change, the first transistor T1 and driving transistor
Potential difference is formed between Tdr, to form leakage current.Meanwhile ctrl2 controls the 8th transistor T8 cut-off, to cut off leakage
The path of electric current avoids potential change caused by the grid due to leakage current of driving transistor Tdr, can equally inhibit different pixels
The difference of the grid potential of the driving transistor Tdr generated in circuit by the grid leakage current of driving transistor Tdr increases, and improves
The ghost phenomena of display panel.It simultaneously can be to avoid the driving signal for driving transistor Tdr output in different pixels circuit
Difference becomes larger, and so as to avoid the difference of the light emission luminance of light emitting diode D1 in different pixels circuit from increasing, is conducive to mention
The homogeneity that high display panel is shown.
Under normal circumstances, the level absolute value of ctrl2 is greater than the level absolute value of scan1, when ctrl2 is high level,
Ctrl2 can be such that the 8th transistor T8 quickly disconnects, so as to realize the grid leakage current of quickly cutting driving transistor Tdr
The phenomenon that.
It is high level in phase III t33, scan1, ctrl2 is high level, and e1 is low level.4th transistor T4 and
Five transistor T5 conducting.The source electrode of driving transistor Tdr is to become the first power supply signal vdd, and driving transistor Tdr conducting is driven
For dynamic transistor Tdr output drive signal to light emitting diode D1, light emitting diode D1 is luminous according to driving signal.
Fig. 7 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.As shown in fig. 7, pixel
Circuit further includes zener diode VT1.The first pole of the first transistor T1 passes through zener diode VT1 and driving transistor Tdr
Grid electrical connection.Wherein, the anode of zener diode VT1 is electrically connected with the first pole of the first transistor T1, zener diode
The cathode of VT1 is electrically connected with the grid of driving transistor Tdr.
Fig. 8 is a kind of timing diagram of the pixel circuit of corresponding diagram 7.Now in conjunction with Fig. 7 and Fig. 8, with pixel circuit described in Fig. 7
In transistor be P row transistor for, illustrate the working principle of the pixel circuit.
T41 in the first stage, scan1 are low level, and e1 is high level.The first transistor T1 and second transistor T2 are led
It is logical.Moreover, when data-signal flow to the anode of zener diode VT1 by second transistor T2 and the first transistor T1, pressure stabilizing
Diode VT1 anode potential is greater than cathode potential, zener diode VT1 one-way conduction, and data-signal passes through zener diode VT1
Write-in extremely drives the grid of transistor Tdr, and is stored by first capacitor C1 to data-signal.Until driving transistor
The grid potential of Tdr is vdata+vth, driving transistor Tdr cut-off.The pressure stabilizing value that zener diode VT1 can be set is
vdata+vth.When driving the grid potential of transistor Tdr to be vdata+vth, zener diode VT1 cathode potential is greater than sun
Electrode potential, it is vdata+vth that zener diode VT1, which keeps the grid potential of driving transistor Tdr, therefore can inhibit different pictures
The difference of the grid potential of the driving transistor Tdr generated in plain circuit by the grid leakage current of driving transistor Tdr increases, and changes
It has been apt to the ghost phenomena of display panel.It simultaneously can be to avoid the driving signal for driving transistor Tdr output in different pixels circuit
Difference become larger, so as to avoid the difference of the light emission luminance of light emitting diode D1 in different pixels circuit from increasing, be conducive to
Improve the homogeneity that display panel is shown.Also, in the first stage during t41, ctrl1 includes low level stage, specific mistake
Journey is identical as the first stage t11 in Fig. 2, and details are not described herein again.
It is high level in second stage t42, scan1, e1 is low level.The first transistor T1 and second transistor T2 is cut
Only, the 4th transistor T4 and the 5th transistor T5 conducting.The source electrode of driving transistor Tdr is to become the first power supply signal vdd, is driven
Dynamic transistor Tdr conducting, drives transistor Tdr output drive signal to light emitting diode D1, light emitting diode D1 is according to driving
Signal shines.
Fig. 9 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.As shown in figure 9, first
Transistor T1 is reset transistor.Data voltage writing module 10 includes second transistor T2, and light emitting module 20 includes luminous two
Pole pipe D1, memory module 30 include first capacitor C1, and electric leakage compensating module 40 includes third transistor T3, and pixel circuit further includes
4th transistor T4, the 5th transistor T5, the 6th transistor T6 and first control signal input terminal Ctrl1.
First scanning signal input terminal of the grid and pixel circuit of the grid of second transistor T2 and the 6th transistor T6
The data-signal of Scan1 electrical connection, the first pole of second transistor T2 and the first pole of third transistor T3 and pixel circuit is defeated
Enter Vdata is held to be electrically connected, the first pole and the 4th transistor T4 of the second pole of second transistor T2 and driving transistor Tdr
The electrical connection of first pole, the first power supply signal of the second pole of the 4th transistor T4 and the second pole of first capacitor C1 and pixel circuit
Input terminal Vdd electrical connection.Drive the second pole of transistor Tdr and the first pole of the 5th transistor T5 and the 6th transistor T6
The electrical connection of second pole drives grid and the first pole of first capacitor C1, the first pole of the 6th transistor T6, the of transistor Tdr
The first pole of one transistor T1 and the second pole electrical connection of third transistor T3, the second pole of the first transistor T1 and pixel electricity
The reference voltage signal input terminal Vref on road is electrically connected, and the grid of the first transistor T1 and the second scanning signal of pixel circuit are defeated
Enter Scan2 is held to be electrically connected, the grid of third transistor T3 is electrically connected with first control signal input terminal Ctrl1, the 4th transistor
The grid of the grid of T4 and the 5th transistor T5 are electrically connected with the LED control signal input terminal E1 of pixel circuit, the 5th transistor
The second pole of T5 is electrically connected with the first pole of light emitting diode D1, the second pole of light emitting diode D2 and the second electricity of pixel circuit
Source signal input terminal Vss electrical connection.
Figure 10 is a kind of timing diagram of the pixel circuit of corresponding diagram 9.Now in conjunction with Fig. 9 and Figure 10, with the electricity of pixel described in Fig. 9
For transistor in road is P row transistor, illustrate the working principle of the pixel circuit.
Scan1 is the timing of the first scanning signal of the first scanning signal input terminal Scan1 input, and scan2 sweeps for second
The timing of the second scanning signal of signal input part Scan2 input is retouched, ctrl1 is first control signal input terminal Ctrl1 input
First control signal timing, e1 be LED control signal input terminal E1 input the first LED control signal timing.
T51 in the first stage, scan1 are high level, and scan2 is low level, and e1 is high level.The first transistor T1 is led
It is logical, second transistor T2, third transistor T3, the 4th transistor T4, the 5th transistor T5 and the 6th transistor T6 cut-off.With reference to
The reference voltage signal of voltage signal inputs Vref input is input to the grid of driving transistor Tdr by the first transistor T1
Pole resets the grid of driving transistor Tdr.
It is low level in second stage t52, scan1, scan2 is high level, and e1 is high level.Second transistor T2 and
Six transistor T6 conducting, the first transistor T1, the 4th transistor T4 and the 5th transistor T5 cut-off.Data voltage is brilliant by second
Body pipe T2, the 6th transistor T6 are written to the grid of driving transistor Tdr, and are deposited by first capacitor C1 to data-signal
Storage.Also, during second stage t52, ctrl1 includes the low level stage, the first stage t11 in detailed process and Fig. 2
Identical, details are not described herein again.
It is high level in phase III t53, scan1, scan2 is high level, and e1 is low level.The first transistor T1,
Two-transistor T2, third transistor T3 and the 6th transistor T5 cut-off, the 4th transistor T4 and the 5th transistor T5 conducting.Driving
The source electrode of transistor Tdr is to become the first power supply signal vdd, and driving transistor Tdr conducting drives transistor Tdr output driving
For signal to light emitting diode D1, light emitting diode D1 is luminous according to driving signal.
The technical solution of the present embodiment, pixel circuit include third transistor, and third transistor is connected in second transistor
Period conducting makes the compensated data voltage of grid no write de-lay present frame for driving transistor, driving by third transistor
Transistor cutoff.Reduce driving transistor gate and charge to the charging time of the compensated data voltage of present frame, to subtract
Lack the residence time of display panel previous frame data voltage, and then reduce the residence time of display panel previous frame ghost,
Improve the ghost phenomena of display panel.
With continued reference to Fig. 9, pixel circuit can also include the 9th transistor T9.The grid of 9th transistor T9 is swept with second
Signal input part Scan2 electrical connection is retouched, the first pole of the 9th transistor T9 is electrically connected with reference voltage signal input terminal Vref, the
The second pole of nine transistor T9 is electrically connected with light emitting diode D11.In reseting stage, the 9th transistor T9 conducting, reference voltage
The reference voltage signal of signal input part Vref input resets light emitting diode D11.
Based on the above technical solution, Figure 11 is the circuit knot of another pixel circuit provided in an embodiment of the present invention
Structure schematic diagram.As shown in figure 11, when the first transistor T1 is double-gated transistor, pixel circuit further includes can be with the 7th transistor
T7.The first pole of 7th transistor T7 is electrically connected with the second pole of the first sub- transistor T11, the second pole of the 7th transistor T7 with
First voltage signal input part V1 electrical connection, the grid of the 7th transistor T7 and the third scanning signal input terminal of pixel circuit
Scan3 electrical connection.In the first stage at the end of t51, first voltage signal input part V1 passes through the 7th transistor T7 input first
The second pole A point of the sub- transistor T11 of voltage signal v1 to first makes the second pole A point of the first sub- transistor T11 be fixed as v1,
So as to avoid the current potential hair of the second pole A point of the first sub- transistor T11 when the first transistor T1 becomes cut-off from conducting
It is raw to change, there is no voltage between the current potential of the second pole A point of the first sub- transistor T11 and the grid potential for driving transistor Tdr
Difference, therefore avoid and form leakage current between the second pole A point of the first sub- transistor T11 and the grid for driving transistor Tdr, the
The potential change of the second pole A point of one sub- transistor T11 drives the grid potential of driving transistor Tdr to change, so that driving
The grid potential of dynamic transistor Tdr is excessively high, and data voltage can not be written, or the grid potential of driving transistor Tdr is too low, fills
Electricity to data voltage overlong time the phenomenon that.
Similarly, Figure 12 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.Such as Figure 12 institute
Show, when the first transistor T1 is double-gated transistor, pixel circuit can also include the 8th transistor T8 and second control signal
Input terminal Ctrl2.By controlling the 8th transistor T8 cut-off from the moment that low level becomes high level in scan2, can cut off
Drain current path between the first transistor T1 and driving transistor Tdr.The process class of the pixel circuit of its detailed process and Fig. 5
Seemingly, details are not described herein again.
The embodiment of the present invention also provides a kind of display panel.Figure 13 is a kind of display panel provided in an embodiment of the present invention
Structural schematic diagram.As shown in figure 13, display panel includes the pixel circuit 110 that any embodiment of that present invention provides.
The embodiment of the present invention also provides a kind of display device.Figure 14 is a kind of display device provided in an embodiment of the present invention
Structural schematic diagram.As shown in figure 14, which includes the display panel 101 that any embodiment of that present invention provides.
The embodiment of the present invention also provides a kind of driving method of pixel circuit.Pixel circuit includes data voltage write-in mould
Block, driving transistor, light emitting module, memory module, the first transistor and electric leakage compensating module, the first transistor and driving crystal
The grid of pipe is electrically connected.Figure 15 is a kind of flow chart of the driving method of pixel circuit provided in an embodiment of the present invention, such as Figure 15
Shown, the driving method of the pixel circuit includes:
Data voltage is written to driving transistor in S210, data write phase, data voltage writing module, and memory module is deposited
The voltage of storage driving transistor gate.
Specifically, when the first transistor is compensation transistor, data write phase further includes threshold compensation process.In number
According to write phase, when compensated data voltage is written to driving transistor by the first transistor in data voltage writing module,
Pixel circuit completes the write-in of data voltage and drives the threshold compensation of transistor Tdr.When the first transistor is to reset crystalline substance
It further include reseting stage before data write phase when body pipe.In reseting stage, the ginseng of reference voltage signal input terminal input
The grid that voltage signal is input to driving transistor by the first transistor is examined, the grid of driving transistor is resetted.
S220, electric leakage compensated stage, the current potential of electric leakage compensating module compensation driving transistor gate.Leak electricity compensated stage with
Data write phase is overlapping, and the duration for the compensated stage that leaks electricity is less than the duration of data write phase.
Specifically, electric leakage compensated stage and data write phase are overlapping, so that electric leakage compensating module is in Data write. module
It is connected during conducting, and the duration for the compensated stage that leaks electricity is less than the duration of data write phase, i.e. the conducting of electric leakage compensating module
Time be less than Data write. module conducting time.When leaking electricity compensating module conducting, data voltage can be mended by electric leakage
It repays module and writes direct the compensated data of grid no write de-lay present frame for making to drive transistor to the grid of driving transistor
Voltage reduces driving transistor gate and charges to the charging time of the compensated data voltage of present frame, to reduce aobvious
Show the residence time of panel previous frame data voltage, and then reduce the residence time of display panel previous frame ghost, improves
The ghost phenomena of display panel.
S230, light emitting phase, driving transistor drive light emitting module to shine according to its grid voltage output drive signal.
The technical solution of the present embodiment, by increasing electric leakage compensated stage in data write phase, so that being written in data
Stage, data voltage can write direct the grid for making to drive transistor to the grid of driving transistor by the compensating module that leaks electricity
The compensated data voltage of present frame is extremely fast written, reduces driving transistor gate and charges to the compensated data of present frame
The charging time of voltage to reduce the residence time of display panel previous frame data voltage, and then reduces display panel
The residence time of previous frame ghost improves the ghost phenomena of display panel.
It based on the above technical solution, can also include the electric leakage inhibition stage.When pixel circuit includes the 7th crystal
Guan Shi, in the electric leakage inhibition stage, the third scanning signal of third scanning signal input terminal input controls the 7th transistor turns, the
The second pole or first of the first transistor is written by the 7th transistor for the first voltage signal of one voltage signal inputs input
Second pole of sub- transistor, so as to avoid the first transistor from conducting become cut-off when the first transistor the second pole or
The current potential of second pole of the first sub- transistor increases, and avoids the second pole in the second pole of the first transistor or the first sub- transistor
Leakage current is formed between the grid of driving transistor.
When pixel circuit includes eight transistor, in the electric leakage inhibition stage, the first control signal input of pixel circuit
It holds the scanning signal inputted in the first scanning signal input terminal to control the 8th transistor from the moment that low level becomes high level to cut
Only, the first transistor can be cut off and drive the drain current path between transistor, inhibit driving transistor to realize
Leakage current.
When pixel circuit includes zener diode, in data write phase, data voltage is written by zener diode
Drive the grid of transistor.After data write phase, zener diode keeps the grid potential of driving transistor, can
To inhibit the leakage current of driving transistor.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of pixel circuit, which is characterized in that including data voltage writing module, driving transistor, light emitting module, storage mould
Block, the first transistor and electric leakage compensating module；
The data voltage writing module is used to that data voltage to be written to the driving transistor；
The first transistor is electrically connected with the grid of the driving transistor, and the first transistor is to compensate transistor or multiple
Bit transistor；
The memory module is electrically connected with the driving transistor, for storing the grid voltage of the driving transistor；
The electric leakage compensating module is electrically connected with the grid of the driving transistor, for compensating the driving transistor gate
Current potential；
The driving transistor is used to drive the light emitting module to shine according to its grid voltage output drive signal.
2. pixel circuit according to claim 1, which is characterized in that the first transistor is compensation transistor；It is described
Data voltage writing module includes second transistor, and the light emitting module includes light emitting diode, and the memory module includes the
One capacitor, the electric leakage compensating module includes third transistor；The pixel circuit further includes the 4th transistor, the 5th transistor
With first control signal input terminal；
The grid of the grid of the second transistor and the first transistor and the first scanning signal of the pixel circuit are defeated
Enter end electrical connection, the data of the first pole of the second transistor and the first pole of the third transistor and the pixel circuit
First pole of signal input part electrical connection, the second pole of the second transistor and the driving transistor and the 4th crystalline substance
First pole of body pipe is electrically connected；
The second pole and the second pole of the first transistor and the first pole of the 5th transistor of the driving transistor
Electrical connection, the second pole of the 5th transistor are electrically connected with the first pole of the light emitting diode, the driving transistor
Grid and the second pole of the first pole of the first capacitor, the first pole of the first transistor and the third transistor are electrically connected
It connects；Second pole of the first capacitor and the second pole of the 4th transistor and the first power supply signal of the pixel circuit are defeated
Enter end electrical connection；The grid of the third transistor is electrically connected with the first control signal input terminal；
The LED control signal of the grid and the pixel circuit of the grid and the 5th transistor of 4th transistor is defeated
Enter end electrical connection；
Second pole of the light emitting diode is electrically connected with the second source signal input part of the pixel circuit.
3. pixel circuit according to claim 1, which is characterized in that the first transistor is reset transistor；It is described
Data voltage writing module includes second transistor, and the light emitting module includes light emitting diode, and the memory module includes the
One capacitor, the electric leakage compensating module includes third transistor；The pixel circuit further includes the 4th transistor, the 5th crystal
Pipe, the 6th transistor and first control signal input terminal；
First scanning signal of the grid and the pixel circuit of the grid of the second transistor and the 6th transistor is defeated
Enter end electrical connection, the data of the first pole of the second transistor and the first pole of the third transistor and the pixel circuit
First pole of signal input part electrical connection, the second pole of the second transistor and the driving transistor and the 4th crystalline substance
First pole of body pipe is electrically connected；Second pole of the 4th transistor and the second pole of the first capacitor and the pixel circuit
The first power supply signal input electrical connection；
The second pole and the first pole of the 5th transistor and the second pole of the 6th transistor of the driving transistor
Electrical connection, the first pole of grid and the first capacitor of the driving transistor, the 6th transistor the first pole, described
First pole of the first transistor and the second pole electrical connection of the third transistor；Second pole of the first transistor and institute
State the reference voltage signal input terminal electrical connection of pixel circuit, the grid of the first transistor and the second of the pixel circuit
The electrical connection of scanning signal input terminal；The grid of the third transistor is electrically connected with the first control signal input terminal；
The LED control signal of the grid and the pixel circuit of the grid and the 5th transistor of 4th transistor is defeated
Enter end electrical connection；Second pole of the 5th transistor is electrically connected with the first pole of the light emitting diode, the light-emitting diodes
Second pole of pipe is electrically connected with the second source signal input part of the pixel circuit.
4. pixel circuit according to claim 2 or 3, which is characterized in that the turn-on time of the third transistor is less than
The turn-on time of the second transistor, the third transistor are connected during the second transistor is connected.
5. pixel circuit according to claim 4, which is characterized in that the first of the first control signal input terminal input
The absolute value for controlling signal level is greater than the absolute value for the first scanning signal level that the first scanning signal input terminal inputs.
6. pixel circuit according to claim 2 or 3, which is characterized in that further include the 7th transistor and first voltage letter
Number input terminal；The first transistor is double-gated transistor；
The first transistor includes the first sub- transistor and the second sub- transistor；The first grid of the first sub- transistor and
The second grid of the second sub- transistor is electrically connected, and the grid as the first transistor；The first sub- transistor
The first extremely described the first transistor the first pole, the second pole of the first sub- transistor and the described second sub- transistor
The electrical connection of first pole；Second pole of the second extremely described the first transistor of the second sub- transistor；
First pole of the 7th transistor and the second pole of the first transistor or the second pole of the first sub- transistor
Electrical connection, the second pole of the 7th transistor is electrically connected with the first voltage signal input part；7th transistor
Grid is electrically connected with the third scanning signal input terminal of the pixel circuit.
7. pixel circuit according to claim 2 or 3, which is characterized in that further include the 8th transistor and the second control letter
Number input terminal；The first transistor is double-gated transistor；
The first transistor includes the first sub- transistor and the second sub- transistor；The first grid of the first sub- transistor and
The second grid of the second sub- transistor is electrically connected, and the grid as the first transistor；The first sub- transistor
The first extremely described the first transistor the first pole, the second pole of the first sub- transistor and the described second sub- transistor
First pole is electrically connected by the 8th transistor；The second of the second extremely described the first transistor of the second sub- transistor
Pole；
First pole of the 8th transistor is electrically connected with the second pole of the described first sub- transistor, and the of the 8th transistor
Two poles are electrically connected with the first pole of the described second sub- transistor, and the grid of the 8th transistor and the second control signal are defeated
Enter end electrical connection.
8. pixel circuit according to claim 2, which is characterized in that further include zener diode；
First pole of the first transistor is electrically connected by the zener diode with the grid of the driving transistor；Its
In, the anode of the zener diode is electrically connected with the first pole of the first transistor, the cathode of the zener diode with
The grid electrical connection of the driving transistor.
9. a kind of display panel, which is characterized in that including any pixel circuit of claim 1-8.
10. a kind of driving method of pixel circuit, the pixel circuit includes data voltage writing module, driving transistor, hair
Optical module, memory module, the first transistor and electric leakage compensating module, the grid of the first transistor and the driving transistor
Electrical connection；It is characterized in that, the driving method of the pixel circuit includes:
Data voltage, the storage mould is written to the driving transistor in data write phase, the data voltage writing module
Block stores the voltage of the driving transistor gate；
Leak electricity compensated stage, and the electric leakage compensating module compensates the current potential of the driving transistor gate；The electric leakage compensates rank
Section is located in the data write phase, and the duration of the electric leakage compensated stage is less than the duration of the data write phase；
Light emitting phase, the driving transistor drive the light emitting module to shine according to its grid voltage output drive signal.
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