CN107342049B - The driving method of display panel and display panel - Google Patents
The driving method of display panel and display panel Download PDFInfo
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- CN107342049B CN107342049B CN201710765034.3A CN201710765034A CN107342049B CN 107342049 B CN107342049 B CN 107342049B CN 201710765034 A CN201710765034 A CN 201710765034A CN 107342049 B CN107342049 B CN 107342049B
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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
Abstract
The embodiment of the invention discloses the driving methods of a kind of display panel and display panel.Wherein, display panel includes: the multiple pixel circuits being arranged in array, and pixel circuit includes: light-emitting component, for shining in response to driving current；Drive module, for providing driving current to light-emitting component；Module is kept, for keeping the control terminal of drive module in the voltage of light emitting phase；At least one the first transistor is electrically connected with the control terminal of drive module, for writing a signal to the control terminal of drive module；At least one control module, each control module are electrically connected with the grid of a first transistor, for reducing leakage current when the first transistor shutdown in light emitting phase.Technical solution provided in an embodiment of the present invention can reduce the leakage current of the first transistor on light emitting phase leakage path, flicker problem caused by reducing because of electric leakage, and can reduce the characteristic drift of the first transistor, improve the stability of pixel circuit.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of driving sides of display panel and display panel
Method.
Background technique
Existing Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display compares liquid crystal
Show that device, OLED have many advantages, such as low low energy consumption, production cost, self-luminous, wide viewing angle and fast response time, currently, in mobile phone, the palm
The display fields such as upper computer (Personal Digital Assistant, PDA), digital camera are widely used.It is organic
Each pixel of active display includes the pixel circuit that Organic Light Emitting Diode and driving organic light-emitting diode are shown.
Pixel circuit generally comprises a driving transistor, several switching transistors and storage capacitance, such as 2T1C picture
Plain circuit includes a driving transistor, a switching transistor and a capacitor.In luminescence process, driving transistor is generated
Driving current drives organic light-emitting diode, and capacitor is used for the grid voltage of stabilized driving transistor, makes to drive crystal
Pipe generates stable driving current.In existing pixel-driving circuit, has switching transistor and generate leakage current, these switch crystal
Pipe and capacitor form leakage path, and the current potential on capacitor is caused to change, and then drive the grid and source voltage of transistor
Difference changes, and the drive current variations that driving transistor generates cause the light emission luminance of Organic Light Emitting Diode to change, cause
Flashing.
Summary of the invention
The present invention provides the driving method of a kind of display panel and display panel, to realize the crystal reduced in pixel circuit
Pipe light emitting phase electric leakage, and then reduce display flashing, improve display effect.
On the one hand, the embodiment of the invention provides a kind of display panel, the display panel include be arranged in array it is multiple
Pixel circuit, the pixel circuit include:
Light-emitting component, for shining in response to driving current；
Drive module, for providing the driving current to the light-emitting component；
Module is kept, for keeping the control terminal of the drive module in the voltage of light emitting phase；
At least one the first transistor is electrically connected with the control terminal of the drive module, for writing a signal to the drive
The control terminal of dynamic model block；
At least one control module, each control module are electrically connected with the grid of a first transistor, are used for
In the light emitting phase, leakage current when the first transistor shutdown is reduced.
On the other hand, the embodiment of the invention also provides a kind of driving method of display panel, which includes:
Data write phase, the control module conducting, the first transistor conducting, the first crystalline substance that signal passes through conducting
The control terminal of the drive module is written in body pipe；
Light emitting phase, the control module shutdown, the first transistor shutdown, the drive module generate driving electricity
Stream drives the light-emitting component to shine.
Technical solution provided in an embodiment of the present invention, control module are electrically connected with the grid of the first transistor, in luminous rank
Section, control module shutdown, the grid of the first transistor and other signals are isolated, are equivalent to make the grid of the first transistor
In high-impedance state, the leakage current of the first transistor can be effectively reduced, effectively inhibit flashing, improve display effect.But also it can
To reduce the characteristic drift of the first transistor, the stability of pixel circuit is improved.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of driver' s timing figure provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention.
Fig. 4 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention
Fig. 6 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention.
Fig. 7 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention.
Fig. 8 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention.
Fig. 9 is another driver' s timing figure provided in an embodiment of the present invention；
Figure 10 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention.
Figure 11 is a kind of flow diagram of the driving method of display panel 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.
The embodiment of the invention provides a kind of display panel, which includes the multiple pixels electricity being arranged in array
Road.It illustratively, is a kind of circuit diagram of pixel circuit provided in an embodiment of the present invention, the pixel circuit packet referring to Fig. 1, Fig. 1
It includes:
Light-emitting component 11, for shining in response to driving current；
Drive module 12, for providing driving current to light-emitting component 11；
Module 13 is kept, for keeping the control terminal of drive module 12 in the voltage of light emitting phase；
At least one the first transistor 14, is electrically connected with the control terminal of drive module 12, for writing a signal to driving mould
The control terminal of block；
At least one control module 15, each control module 15 are electrically connected with the grid of a first transistor 14, are used for
Light emitting phase reduces leakage current when the first transistor 14 turns off.
In embodiments of the present invention, pixel circuit may include one or more the first transistor 14, the first transistor 14
It as switching transistor, can be the transistor of 12 control terminal of data-signal write driver module, be also possible to for that will answer
The transistor of the control terminal of position signal write driver module 12, is also possible to play the role of other transistor.The first transistor
14 be usually to be electrically connected the control terminal of drive module 13, namely electrical connection keeps module 13 and the control terminal of drive module 12 to be electrically connected
The one end connect.In data write phase, control module 15 is connected according to the control signal K that its control terminal inputs, control module 15
The grid of the first transistor 14, the first transistor 14 are written by the control module 15 of conducting by the scanning signal VG of first end input
Conducting, the control terminal and holding module of the data-signal Vdata write driver module 12 of the first pole input of the first transistor 14
First end namely first node N1.In light emitting phase, the first transistor 14 is turned off, and the first transistor 14 can generate electric leakage, the
One transistor 14 and holding module 13 form leakage path, generate leakage current, will cause the current potential for keeping 13 first end of module,
That is the current potential of the control terminal of drive module 12 changes, and drive module 12 generate driving current generally with drive module 12
The potential voltage of control terminal is related, and the electric leakage of the first transistor 14 will affect the drive current variations of the generation of drive module 12, makes
The brightness of light-emitting component 11 changes, and may generate flashing.And in the embodiment of the present invention, control module 15 and first crystal
The grid of pipe 14 is electrically connected, and in light emitting phase, control module 15 is turned off, by the grid of the first transistor and other signals carry out every
From, it is equivalent to make the grid of the first transistor to be in high-impedance state, the leakage current of the first transistor 14 can be effectively reduced, it is effective to press down
System flashing, improves display effect.But also the characteristic drift of the first transistor 14 can be reduced, improve the stabilization of pixel circuit
Property.
Fig. 2 is a kind of driver' s timing figure provided in an embodiment of the present invention, and referring to fig. 2, control module is connected at the t1 moment, is swept
The grid that the first transistor 14 is written by the control module 15 of conducting by signal VG is retouched, the first transistor is connected at the t2 moment,
The t3 moment turns off；At the t4 moment, signal control module 15 is turned off.When i.e. the first transistor 14 is connected or before conducting, electricity
The control module 15 of connection is connected；When the first transistor 14 turns off or after shutdown, the control module 15 of electrical connection is turned off.
That is, the turn-on time section of the first transistor is located within the turn-on time section of control module 15.Control module 15 turns off
When, the first transistor 14 is also switched off, and the control of control module can be written in data-signal Vdata by the first transistor 14 of conducting
End.
The display scan frequency of display panel provided in an embodiment of the present invention, display panel is smaller than equal to 60Hz, if
The scan frequency of display panel is less than 10Hz, and the time of the light emitting phase of the pixel circuit of display panel is relatively long.Such as it is right
When showing scan frequency 60Hz, the duration of light emitting phase is about 16.67ms in a frame, when display scan frequency is from original
60Hz is reduced to 20Hz, and the duration of light emitting phase becomes about 50ms from about 16.67ms in a frame.If the first transistor produces
Raw electric leakage, the electric leakage time of the first transistor is also longer, and display panel is easier the problem of display flashing occur.Control module exists
Light emitting phase shutdown, makes the grid of the first transistor be in high-impedance state, reduces the leakage current on the first transistor, inhibits display surface
The flashing of plate improves display effect.
Fig. 3 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention.Referring to Fig. 3, the display panel packet
It includes control signal wire, a plurality of scan line (S1, S2, S3 ...) extended in a first direction and a plurality of extends in a second direction
Data line Vdata；Multi-strip scanning line and multiple data lines Vdata insulation, which intersect, limits multiple sub-pixels 201, each sub-pixel
201 include the pixel circuit that an any embodiment of that present invention provides；The corresponding electrical connection at least one of every a line pixel circuit is swept
Line is retouched, each column pixel circuit is corresponding to be electrically connected a data line Vdata, the control terminal and control of the control module in pixel circuit
Signal wire electrical connection processed.
Optionally, display panel provided in an embodiment of the present invention further includes the first level signal line and second electrical level signal
Line.In the pixel circuit in display panel provided in an embodiment of the present invention, at least one control module includes the first control mould
Block；At least one the first transistor includes switching transistor；Fig. 4 is the electricity of another pixel circuit provided in an embodiment of the present invention
Lu Tu the first end of the first control module 151 scan line Sn corresponding with pixel circuit electrical connection, second end and is opened referring to fig. 4
Close the grid electrical connection of transistor M1, control terminal is electrically connected with control signal wire VT1；The first pole of switching transistor M1 and pixel
The corresponding data line data electrical connection of circuit, the second pole are electrically connected with the control terminal of drive module 12；The first of drive module 12
End is electrically connected with the first level signal line PVDD, second end is electrically connected with the first pole of light-emitting component 11；Keep the of module 13
One end and the control terminal of drive module 12 are electrically connected；13 second end of module is kept to be electrically connected with the first end of drive module 12；It shines
Second pole of element 11 is electrically connected with second electrical level signal wire PVEE.The course of work of pixel circuit shown in Fig. 4 may include as
Next stage: data write phase, the control signal on control signal wire VT1 are written the control terminal of the first control module 151, and first
Control module 151 is connected, the 151 write switch transistor M1 of the first control module that the scanning signal on scan line Sn passes through conducting
Grid, switching transistor M1 conducting the control terminal of the data-signal write driver module on data line data and keeps module
First end namely first node N1.Light emitting phase, switching transistor shutdown, the first control module shutdown, drive module according to
The voltage of control terminal generates driving current, and driving current drives light-emitting component luminescence display, and module is kept to keep drive module
The voltage of control terminal, so that drive module persistently generates driving current driving light-emitting component and shines.The shutdown of first switch module, can
So that the grid of switching transistor is in high-impedance state, the leakage current in switching transistor is reduced, to stablize the electricity of first node N1
Position reduces flashing, improves display effect.
Fig. 5 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention, and referring to Fig. 5, drive module includes driving
Dynamic transistor M0, keeping module includes first capacitor Cst1, and the first control module includes second transistor M2；Second transistor M2
The first pole be electrically connected with scan line Sn, the second pole is electrically connected with the grid of switching transistor M1, grid and control signal wire VT1
Electrical connection；The first pole of switching transistor M1 is electrically connected with data line data, the second pole and the grid of driving transistor M0 are electrically connected
It connects；The first pole of transistor M0 is driven to be electrically connected with the first level signal line PVDD, the first pole of the second pole and light-emitting component 11
Electrical connection；The first pole of first capacitor Cst1 is electrically connected with the grid of driving transistor M0, the second pole is with driving transistor M0's
The electrical connection of first pole；Second pole of light-emitting component 11 is electrically connected with second electrical level signal wire PVEE.
Optionally, display panel provided in an embodiment of the present invention further includes the first level signal line, second electrical level signal wire
With a plurality of luminous signal line, the corresponding luminous signal line of every a line pixel circuit.Fig. 6 is provided in an embodiment of the present invention another
The circuit diagram of kind pixel circuit, referring to Fig. 6, which further includes Data write. module 16, the first light emitting control module 17
With the second light emitting control module 18；At least one control module includes the second control module 152；At least one the first transistor packet
Include compensation transistor M10 and reset transistor M11；The control terminal of Data write. module 16 scan line Sn corresponding with pixel circuit
Electrical connection, first end is electrically connected with data line data, second end is electrically connected with the first end of drive module 12, namely with the second section
Point N2 electrical connection；The control terminal of second control module 152 is electrically connected with control signal wire VT1, first end and scan line Sn are electrically connected
It connects, second end is electrically connected with the grid of compensation transistor M10；Compensate the first pole and the second of drive module 12 of transistor M10
End electrical connection, namely be electrically connected with third node N3, the second pole of transistor M10 and the control terminal of drive module 12 are compensated,
It is electrically connected with first node N1；The first pole of reset transistor M11 is electrically connected with third level signal line Vref3, the second pole
It is electrically connected with the control terminal of drive module 12；The first end of first light emitting control module 17 is electrically connected with the first level signal line PVDD
It connects, second end and the first end electrical connection of drive module 12, control terminal luminous signal line Emit1 corresponding with pixel circuit are electrically connected
It connects；It keeps the first end of module 13 to be electrically connected with the control terminal of drive module 12, keeps the second end and the first level of module 13
Signal wire PVDD electrical connection；The first end of second light emitting control module 18 is electrically connected with the second end of drive module 12, second end
It is electrically connected with the first pole of light-emitting component 11, control terminal is electrically connected with luminous signal line Emit1；Second pole of light-emitting component 11 with
Second electrical level signal wire PVEE electrical connection.
Illustratively, in a frame of display, first stage, also referred to as initial phase or reseting stage, luminous signal
The control of the control terminal and the second light emitting control module 18 of the first light emitting control module 17 is written in luminous signal on line Emit1
End, the first light emitting control module 17 and the second light emitting control module 18 turn off, the first scanning signal write-in on scan line Sn-1
The grid of reset transistor M1, reset transistor M1 are connected, and the third level signal on third level signal line Vref3, which is written, drives
The control terminal of dynamic model block 12 and the first end for keeping module 13, to the voltage and holding module 14 of the control terminal of drive module 12
The voltage of first end is resetted.Second stage, also referred to as data write phase, reset transistor M1 shutdown, control signal wire VT1
On control signal be written the control terminal of the second control module 152, the conducting of the second control module 152, second on scan line Sn
Scanning signal is compensated transistor M10 conducting, is swept by the grid of the second control module 152 write-in compensation transistor M10 of conducting
The control terminal of the second scanning signal write-in Data write. module 16 on line Sn is retouched, Data write. module 16 is connected, data line
Data-signal on data passes sequentially through Data write. module 16, drive module 12 and compensation transistor M10 write driver module
12 control terminal namely first node N1, the voltage of the control terminal of drive module 12 namely the voltage of first node N1 gradually rise
Height, until drive module 12 turns off, the voltage of first node N1 and the voltage of data-signal and the threshold voltage of drive module are closed
Connection.Phase III, also referred to as light emitting phase, Data write. module 16 and compensation transistor M10 shutdown, the second control module 152
It turns off, the control terminal and the second light emitting control of the first light emitting control module 17 is written in the luminous signal on luminous signal line Emit1
The control terminal of module 18, the first light emitting control module 17 and the conducting of the second light emitting control module 18, drive module 12 generate driving
The driving current of electric current, generation is unrelated with the threshold voltage of drive module 12, drives current through the second light emitting control module 18
Light-emitting component 11 is driven to shine, to realize the display function of display panel.In light emitting phase, the shutdown of the second control module 152 can
The grid for compensating transistor M10 is set to be in high-impedance state, the leakage path for reducing compensation transistor M10 and module 13 being kept to be formed
On leakage current, stabilize the current potential of first node N1, inhibit flashing, improve display effect.
Fig. 7 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention, referring to Fig. 7, pixel electricity shown in Fig. 6
On the basis of road, in pixel circuit provided in an embodiment of the present invention, at least one control module further includes third control module
153；
The first end of third control module 153 is electrically connected with control signal wire VT1, second end and reset transistor M11
Grid electrical connection, the lastrow scan line Sn-1 electrical connection of control terminal scan line Sn corresponding with pixel circuit.
It should be noted that each scan line can be with the scan drive circuit on display panel, also referred to as gate driving circuit
(GOA) output end electrical connection, GOA circuit are located at the non-display area of display panel, can be located at the viewing area of display panel
The side in domain or opposite two sides.Scan line Sn-1 is the previous scan line of scan line Sn, can be from GOA circuit to scan line
Sn-1 charging, that is, provide the first scanning signal；It charges to scan line Sn, that is, the second scanning signal is provided；It scan line Sn-1 and sweeps
Retouch line Sn successively arranged adjacent.GOA circuit is providing the first scanning signal to scan line Sn-1, after completing charging, and then
The second scanning signal is provided to scan line Sn.First scanning signal is the preceding signal of the second scanning signal, that is to say, that first
Scanning signal is identical with the amplitude of the second scanning signal, and phase is different.
In the above-mentioned pixel circuit course of work, in the first stage, third control is written in the control signal on control signal wire VT1
The control terminal of molding block 153, third control module 153 are connected, the first scanning signal on scan line Sn-1 pass through conducting the
The grid of reset transistor M11, reset transistor M11 conducting is written in three control modules 153；In second stage, reset transistor
M11 shutdown；In the phase III, third control module 153 is turned off, and the grid of reset transistor M11 can be made to be in high-impedance state, is reduced
Leakage current on reset transistor M11 and the leakage path for keeping module 13 to be formed, further stabilizes first node N1's
Current potential inhibits flashing, improves display effect.
It should be noted that third control module 153 can be only set in the other embodiments that the present invention is implemented,
It is not provided with the second control module 152, compensates grid and the scan line Sn-1 electrical connection of transistor.
Fig. 8 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention, referring to Fig. 8, in above-described embodiment
On the basis of, Data write. module includes third transistor M3, and the second control module 152 includes the 4th transistor M4, third control
Module 153 includes the 5th transistor M5, and the first light emitting control module 17 includes the 6th transistor M6, the second light emitting control module 18
Including the 7th transistor M7；Drive module 12 includes driving transistor M0, and keeping module 13 includes the second capacitor Cst2；
The first pole of third transistor M3 is electrically connected with data line Sn, the second pole and the first pole of driving transistor M0 are electrically connected
It connects, grid is electrically connected with scan line Sn；
The first pole of 4th transistor M4 is electrically connected with scan line Sn, the second pole and the grid of compensation transistor M10 are electrically connected
It connects, grid is electrically connected with control signal wire VT1；
The first pole for compensating transistor M10 is electrically connected with the grid of driving transistor M0, compensates the second pole of transistor M10
It is electrically connected with the second pole of driving transistor M0；
The previous article of scan line Sn-1 electrical connection of the first pole of 5th transistor M5 and corresponding scan line Sn, the second pole with
The grid electrical connection of reset transistor M11, grid are electrically connected with control signal wire VT1；
The first pole of reset transistor M11 is electrically connected with third level signal line Vref3, reset transistor M11 second
Pole is electrically connected with driving transistor M0 grid；
The first pole of 6th transistor M6 is electrically connected with the first level signal line PVDD, the second pole is with driving transistor M0's
The electrical connection of first pole, grid are electrically connected with corresponding luminous signal line Emit1；
The first pole of 7th transistor M7 be electrically connected with the second pole of driving transistor M0, the second pole and light-emitting component 11
The electrical connection of first pole, grid are electrically connected with corresponding luminous signal line Emit1；
The first pole of second capacitor Cst2 and the grid of driving transistor M0, namely be electrically connected with first node N1, second
The second pole of capacitor Cst2 and the first pole of driving transistor M0, namely be electrically connected with second node N2.
Fig. 9 is a kind of driver' s timing figure provided in an embodiment of the present invention.Illustratively illustrate this below with reference to Fig. 8 and Fig. 9
The course of work for the pixel circuit that inventive embodiments provide.Wherein, the first level signal on the first level signal line PVDD is
High level, the second electrical level signal on second electrical level signal wire PVEE are low level.4th transistor M4 and the 5th transistor M5
For N-type transistor, other transistors are P-type transistor.The course of work of the pixel circuit includes such as the next stage:
T1 stage, the luminous signal on luminous signal line Emit1 are high level, the 6th transistor M6 and the 7th transistor M7
Shutdown.Control signal on control signal wire VT1 is high level, the 4th transistor M4 and the 5th transistor M5 conducting, scan line
The grid of reset transistor M11, the first scanning letter are written by the 5th transistor M5 of conducting for the first scanning signal on Sn-1
It number is low level, reset transistor M11 conducting, the third level signal write driver crystal on third level signal line Vref3
First pole of the grid of pipe M0 and the second capacitor Cst2, the third level signal on this stage third level signal line Vref3 can
Think low level signal, is answered with the gate electrode to driving transistor M0 and with the voltage of the first pole of the second capacitor Cst2
Position, guarantees next stage driving transistor M0 conducting, and data-signal is capable of the grid of write driver transistor M0.On scan line Sn
The second scanning signal write-in third transistor M3 grid, and by conducting the 4th transistor M4 write-in compensation transistor
The grid of M10, because the second scanning signal is high level, third transistor M3 and compensation transistor M10 shutdown.This stage is also referred to as just
Stage beginning or reseting stage.
T2 stage, the 6th transistor M6 and the 7th transistor M7 shutdown, the 4th transistor M4 and the 5th transistor M5 conducting,
The first scanning signal on scan line Sn-1 is high level, reset transistor M11 shutdown.The second scanning signal on scan line Sn
For low level, third transistor M3 and compensation transistor M10 are connected, and the data-signal on data line data passes sequentially through third crystalline substance
The first of the grid and the second capacitor Cst2 of body pipe M3, driving transistor M0 and compensation transistor M10 write driver transistor M0
The grid voltage of pole, driving transistor M0 gradually rises, until the grid voltage of driving transistor M0 and source voltage difference are equal to
When driving the threshold voltage of transistor M0, driving transistor M0 shutdown, the grid voltage of driving transistor M0 is remained unchanged, is driven
The grid voltage of transistor M0, i.e. the voltage V of first node N11=Vdata+Vth, wherein VdataFor the data on data line data
The voltage value of signal, VthFor the threshold voltage for driving transistor M0.
Stage after t2, also referred to as light emitting phase, the control signal on control signal wire VT1 are low level, the 4th crystal
Pipe M4 and the 5th transistor M5 shutdown, compensation transistor M10 and reset transistor M11 are also switched off.On luminous signal line Emit1
Luminous signal is low level, the 6th transistor M6 and the 7th transistor M7 conducting.The leakage current of transistor M0 is driven, i.e. driving is brilliant
The driving current driving light-emitting component 11 that body pipe M0 is generated shines, driving current IdMeet following formula:
Wherein, wherein μ be drive transistor M0 carrier mobility, W, L be driving transistor M0 channel width and
Length, CoxFor the gate oxide capacitance amount for driving transistor M0 unit area.VPVDDFor on the first level signal line PVDD
The voltage value of one level signal namely the voltage value of second node N2.It can be seen that the driving current that driving transistor M0 is generated
IdWith the threshold voltage V of driving transistor M0thIt is unrelated.It is abnormal to solve display caused by driving transistor M0 threshold voltage shift
Problem, and in this stage, the 4th transistor M4 and the 5th transistor M5 shutdown, the grid for compensating transistor M10 can be made and answered
The grid of bit transistor M11 is in high-impedance state, reduces on compensation transistor M10 and the leakage path for keeping module 13 to be formed
Leakage current, and the leakage current on reset transistor M11 and the leakage path for keeping module 13 to be formed is reduced, stabilize first
The current potential of node N1 inhibits flashing, improves display effect.
Above-mentioned example is using the 4th transistor M4 and the 5th transistor M5 as N-type transistor, other transistors are P-type crystal
Book is illustrated for pipe, in the other embodiments of the embodiment of the present invention, the 4th transistor M4 and the 5th transistor M5 can
For P-type transistor, other transistors are N-type transistor.
Figure 10 is the circuit diagram of another pixel circuit provided in an embodiment of the present invention, referring to Figure 10.With picture shown in Fig. 8
Unlike plain circuit, the control terminal of the 4th transistor M4 and the control terminal of the 5th transistor M5 and luminous signal line Emit1 electricity
Connection, that is to say, that luminous signal line Emit1 is multiplexed with control signal wire.Luminous signal line Emit1 can on display panel
Luminous signal driving circuit (EOA) output end electrical connection, EOA circuit is located at the non-display area of display panel, Ke Yiwei
In the side or opposite two sides of the display area of display panel.It is charged, that is, mentioned from EOA circuit to luminous signal line Emit1
For luminous signal.It is multiplexed with control signal wire using luminous signal line Emit1, is equivalent to and is replaced using luminous signal line Emit1
Control signal wire VT1 can save control signal wire VT1 and provide the circuit of control signal to control signal wire VT1, together
When save display panel in wiring space, reduce cost.
The embodiment of the invention also provides a kind of driving method of display panel, can be used for driving any embodiment of that present invention
The display panel of offer works.Figure 11 is a kind of process signal of the driving method of display panel provided in an embodiment of the present invention
Figure, referring to Figure 11, which includes:
S510, data write phase, control module conducting, the first transistor conducting, the first crystal that signal passes through conducting
The control terminal of pipe write driver module.
S520, light emitting phase, control module shutdown, the first transistor shutdown, drive module generate driving current, driving hair
Optical element shines.
Control module shutdown can make control module electric due to being electrically connected with the grid of the first transistor for control module
The grid of the first transistor of connection is in high-impedance state, reduces the leakage current on the first transistor, stabilized driving module control terminal
Voltage, inhibit flashing, improve display effect.
In display panel provided in an embodiment of the present invention, drive module includes driving transistor, since driving transistor exists
Meeting occurrence features drift in the course of work, such as the threshold voltage shift of driving transistor, can be to the threshold value electricity for driving transistor
Pressure compensates, and improves display effect, correspondingly, above-mentioned driving method further include:
The threshold compensation stage drives the threshold voltage of transistor to be compensated, and writes with the associated offset voltage of threshold voltage
Enter to keep module；
In light emitting phase, keep module that offset voltage is supplied to driving transistor, driving transistor generates driving current
Light-emitting component is driven to shine.
In the threshold voltage compensation stage, it may also include reseting stage, reseting stage, by reset signal write driver transistor
Grid, to driving transistor reset, to open driving transistor, in data write phase, data-signal to be written
Drive the grid of transistor.It specifically, can be with the description of the reference pair pixel circuit course of work shown in Fig. 8.
The scan frequency of display panel provided in an embodiment of the present invention is smaller than equal to 60Hz.
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 display panel, which is characterized in that including the multiple pixel circuits being arranged in array, the pixel circuit includes:
Light-emitting component, for shining in response to driving current；
Drive module, for providing the driving current to the light-emitting component；
Module is kept, for keeping the control terminal of the drive module in the voltage of light emitting phase；
At least one the first transistor is electrically connected with the control terminal of the drive module, for writing a signal to the driving mould
The control terminal of block；
At least one control module, each control module are electrically connected with the grid of a first transistor, in institute
Light emitting phase is stated, leakage current when the first transistor shutdown is reduced；
The display panel further includes control signal wire, a plurality of scan line extended in a first direction and a plurality of prolongs in a second direction
The data line stretched；The a plurality of scan line and a plurality of data line insulation, which intersect, limits multiple sub-pixels, each sub- picture
Element includes a pixel circuit；Pixel circuit described in every a line corresponds to a scan line, each column pixel circuit
A corresponding data line, the control terminal of the control module are electrically connected with the control signal wire；
The display panel further include the first level signal line, second electrical level signal wire, third level signal line and it is a plurality of shine
Signal wire, the corresponding luminous signal line of pixel circuit described in every a line；The pixel circuit further includes data write-in mould
Block, the first light emitting control module and the second light emitting control module；At least one described control module includes the second control module；Institute
Stating at least one the first transistor includes compensation transistor and reset transistor；
The scan line electrical connection corresponding with the pixel circuit of the control terminal of the Data write. module, first end with it is described
Data line electrical connection, second end are electrically connected with the first end of the drive module；
The control terminal of second control module and control signal wire electrical connection, first end are corresponding with the pixel circuit
The scan line electrical connection, second end are electrically connected with the grid of the compensation transistor；
First pole of the compensation transistor is electrically connected with the second end of the drive module, the second pole of the compensation transistor
It is electrically connected with the control terminal of the drive module；
First pole of the reset transistor is electrically connected with the third level signal line, the control of the second pole and the drive module
End electrical connection processed；
The first end of the first light emitting control module is electrically connected with the first level signal line, second end and the driving mould
The first end electrical connection of block, the control terminal luminous signal line electrical connection corresponding with the pixel circuit；
The first end for keeping module is electrically connected with the control terminal of the drive module, the second end for keeping module and institute
State the electrical connection of the first level signal line；
The first end of the second light emitting control module is electrically connected with the second end of the drive module, second end shines with described
The first pole electrical connection of element, control terminal are electrically connected with the luminous signal line；
Second pole of the light-emitting component is electrically connected with the second electrical level signal wire.
2. display panel according to claim 1, which is characterized in that when the first transistor is connected or it is connected
Before, the control module conducting of electrical connection；When the first transistor turns off or after shutdown, what is be electrically connected is described
Control module shutdown.
3. display panel according to claim 1, which is characterized in that the display scan frequency of the display panel be less than etc.
In 60Hz.
4. display panel according to claim 1, which is characterized in that when the control module turns off, the institute of electrical connection
The grid for stating the first transistor is high-impedance state.
5. display panel according to claim 1, which is characterized in that at least one described control module further includes third control
Molding block；
The first end of the third control module is electrically connected with the control signal wire, the grid of second end and the reset transistor
Pole is electrically connected, scan line described in the lastrow of the control terminal scan line corresponding with the pixel circuit is electrically connected.
6. display panel according to claim 5, which is characterized in that the Data write. module includes third transistor,
Second control module includes the 4th transistor, and the third control module includes the 5th transistor, and described first, which shines, controls
Molding block includes the 7th transistor including the 6th transistor, the second light emitting control module；The drive module includes driving
Transistor, the holding module include the second capacitor；
The of first pole of the third transistor and corresponding data line electrical connection, the second pole and the driving transistor
The electrical connection of one pole, grid are electrically connected with the corresponding scan line；
The grid of first pole of the 4th transistor and the corresponding scan line electrical connection, the second pole and the compensation transistor
Pole electrical connection, grid are electrically connected with the control signal wire；
First pole of the compensation transistor is electrically connected with the grid of the driving transistor, the second pole of the compensation transistor
It is electrically connected with the second pole of the driving transistor；
The previous article of scan line electrical connection of first pole of the 5th transistor and the corresponding scan line, the second pole with it is described
The grid electrical connection of reset transistor, grid are electrically connected with the control signal wire；
First pole of the reset transistor is electrically connected with third level signal line, the second pole of the reset transistor with it is described
Drive transistor gate electrical connection；
First pole of the 6th transistor is electrically connected with the first level signal line, the second pole and the driving transistor
The electrical connection of first pole, grid are electrically connected with the corresponding luminous signal line；
First pole of the 7th transistor be electrically connected with the second pole of the driving transistor, the second pole and the light-emitting component
The electrical connection of the first pole, grid and corresponding luminous signal line electrical connection；
First pole of second capacitor is electrically connected with the grid of the driving transistor, the second pole of second capacitor and institute
State the first pole electrical connection of driving transistor.
7. display panel according to claim 6, which is characterized in that the luminous signal line is multiplexed with the control signal
Line；
The grid of the 4th transistor in the pixel circuit and the grid of the 5th transistor shine with corresponding
Signal wire electrical connection.
8. a kind of for driving the driving method of display panel described in claim 1 characterized by comprising
Data write phase, the control module conducting, the first transistor conducting, the first transistor that signal passes through conducting
The control terminal of the drive module is written；
Light emitting phase, the control module shutdown, the first transistor shutdown, the drive module generate driving current, drive
The light-emitting component is moved to shine.
9. driving method according to claim 8, which is characterized in that the drive module includes driving transistor, described
Driving method further include:
The threshold voltage in threshold compensation stage, the driving transistor is compensated, and is write with the associated offset voltage of threshold voltage
Enter the holding module；
In the light emitting phase, keep module that the offset voltage is supplied to the driving transistor, the driving transistor
Generating driving current drives the light-emitting component to shine.
10. driving method according to claim 8 or claim 9, which is characterized in that the scan period of the display panel be less than etc.
In 60Hz.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107908310B (en) | 2017-11-13 | 2019-12-06 | 京东方科技集团股份有限公司 | pixel circuit, driving method thereof and display device |
| CN108091308B (en) * | 2017-12-08 | 2019-03-22 | 武汉华星光电技术有限公司 | A kind of GOA circuit |
| CN108682399B (en) * | 2018-05-21 | 2020-03-06 | 京东方科技集团股份有限公司 | Display device, pixel driving circuit and driving method thereof |
| CN110111738B (en) * | 2019-05-31 | 2022-02-22 | 京东方科技集团股份有限公司 | Pixel circuit, display substrate, display device and driving method |
| CN110223636B (en) | 2019-06-17 | 2021-01-15 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method thereof and display device |
| CN111312170A (en) * | 2019-11-13 | 2020-06-19 | 武汉华星光电半导体显示技术有限公司 | Pixel driving circuit and display device |
| CN111710303B (en) * | 2020-07-16 | 2021-08-10 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method thereof and display device |
| CN112331150A (en) * | 2020-11-05 | 2021-02-05 | Tcl华星光电技术有限公司 | Display device and light-emitting panel |
| CN113012638B (en) * | 2020-12-31 | 2022-04-05 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN115997248A (en) * | 2021-08-20 | 2023-04-21 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| CN114141200B (en) * | 2021-12-03 | 2023-03-10 | 武汉天马微电子有限公司 | Display module and leakage current detection method |
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