CN107967894B - Pixel-driving circuit and its driving method, display panel and display device - Google Patents
Pixel-driving circuit and its driving method, display panel and display device Download PDFInfo
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- CN107967894B CN107967894B CN201810072143.1A CN201810072143A CN107967894B CN 107967894 B CN107967894 B CN 107967894B CN 201810072143 A CN201810072143 A CN 201810072143A CN 107967894 B CN107967894 B CN 107967894B
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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]
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Abstract
The present invention provides a kind of pixel-driving circuit, comprising: multiple illuminating parts, an auxiliary compensation module；Auxiliary compensation module is under the control of voltage controling end selectively by high voltage and low-voltage to the first pole for driving transistor；Reset module makes control electrode extremely be connected with second under the control of the second control terminal when auxiliary compensation module exports low-voltage, and voltage is the threshold voltage for driving transistor；In auxiliary compensation module output HIGH voltage, control electrode is extremely connected threshold value compensation module with first under the control of the first control terminal, and voltage is the sum of high voltage and threshold voltage；Under the control of scanning end control electrode is written in the data-signal of data terminal by Data write. module, and control pole tension is the sum of data-signal, high voltage and threshold voltage；Driving transistor generates driving current driving illuminating part under the control of control electrode and shines.The present invention also provides a kind of driving method of pixel-driving circuit, display panel and display devices, it is possible to reduce the quantity of transistor.
Description
Technical field
The present invention relates to field of display technology, and in particular, to a kind of pixel-driving circuit and its driving method, display surface
Plate and display device.
Background technique
Organic light emitting display (OLED) is one of the hot spot of current field of display, compared with liquid crystal display, 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, digital camera etc.
Display field OLED, which has begun, replaces traditional LCD display.The design of pixel-driving circuit is OLED display core skill
Art content has important research significance.
It is that the electric current generated by driving transistor in saturation state is driven that traditional oled panel, which can shine, input
Identical gray scale voltage, but different critical voltages can generate different driving currents, also result in the inconsistency of electric current.Than
Such as, the brightness uniformity of traditional 2T1C pixel-driving circuit is very poor.For this purpose, the method for current solution is exactly in pixel driver
Interior addition compensating unit in circuit eliminates the influence of the threshold voltage vt h of driving transistor by compensating unit, still, leads to
It crosses and increases the quantity that compensating unit increases thin film transistor (TFT) TFT, not only result in the rapid decline of aperture opening ratio and transmitance, from
And it is the current density for guaranteeing to need to increase in the case where light emission luminance organic luminous layer, it can be easy to cause emitting layer material in this way
Aging, entire oled panel service life decline；And also cause increased costs.
Summary of the invention
The present invention provides a kind of pixel-driving circuit and its drive one of for the above-mentioned technical problems in the prior art
Dynamic method, display panel and display device, can not only reduce cost, but also aperture opening ratio and transmitance can be improved, in this way
In the case where guaranteeing light emission luminance, the current density of emitting layer material will reduce, and emitting layer material is non-aging.
The present invention provides a kind of pixel-driving circuit, comprising: multiple illuminating parts, an auxiliary compensation module and with it is described
The one-to-one Data write. module of illuminating part, resetting module, threshold value compensation module, driving transistor；
The auxiliary compensation module, with high voltage end, low-voltage end, voltage controling end, multiple driving transistors
First extremely be connected, under the control of voltage controling end selectively by the low electricity of the high voltage of high voltage end and low-voltage end
It presses to the first pole；
The resetting module, and the second control terminal and drives the control electrode and second of transistor to be extremely connected, is used for the
Under the control of two control terminals and when auxiliary compensation module exports low-voltage, control electrode is set extremely to be connected with second, the electricity of control electrode
Pressure is the threshold voltage of driving transistor；
The threshold value compensation module is extremely connected with the control electrode and first of the first control terminal and driving transistor, is used for
Under the control of the first control terminal and in auxiliary compensation module output HIGH voltage, control electrode is set extremely to be connected with first, control electrode
Voltage be the sum of high voltage and threshold voltage；
The Data write. module is connected with scanning end, data terminal and control electrode, for that will count under the control of scanning end
Control electrode is written according to the data-signal at end, so that the voltage of control electrode is the sum of data-signal, high voltage and threshold voltage；
Second pole of driving transistor is connected with illuminating part, for generating driving current driving hair under the control of control electrode
Light part shines.
Preferably, the Data write. module, comprising: the first transistor and first capacitor；
The control electrode of the first transistor is connected with scanning end, and the first pole is connected with data terminal, the second pole and the first electricity
The first end of appearance is connected；
The second end of the first capacitor is connected with the control electrode of the driving transistor.
Preferably, the threshold value compensation module includes: second transistor and the second capacitor；
The control electrode of the second transistor is connected with the first control terminal, the first pole phase of the first pole and driving transistor
Even, the second pole is connected with the first end of the second capacitor；
The second end of second capacitor is connected with the control electrode of driving transistor.
Preferably, the resetting module includes: third transistor；
The control electrode of the third transistor is connected with the second control terminal, the control electrode phase of the first pole and driving transistor
Even, the second pole is extremely connected with the second of driving transistor.
Preferably, the auxiliary compensation module includes: that the 4th transistor, the 5th transistor, the 6th transistor and the 7th are brilliant
Body pipe；
The voltage controling end includes first voltage control terminal and second voltage control terminal；
The control electrode of 4th transistor is connected with first voltage control terminal, and the first pole is connected with high voltage end, and second
Output end of the pole as auxiliary compensation module；
The control electrode of 5th transistor is connected with second voltage control terminal, and the first pole is connected with high voltage end, and second
Output end of the pole as auxiliary compensation module；
The control electrode of 6th transistor is connected with first voltage control terminal, the first pole of the first pole and the 7th transistor
It is connected, output end of second pole as auxiliary compensation module；
The control electrode of 7th transistor is connected with second voltage control terminal, and the second pole is connected with low-voltage end.
The present invention also provides a kind of display panel, the pixel-driving circuit including the above-mentioned offer of the present invention.
Preferably, an illuminating part and corresponding Data write. module, resetting module, threshold value compensation module, driving crystal
Pipe is known as a sub-pixel unit；Multiple sub-pixel units are arranged along the same row interval of the display panel.
The present invention also provides a kind of display device, the display panel including the above-mentioned offer of the present invention.
The present invention also provides a kind of driving method of pixel-driving circuit, the above-mentioned offer of the pixel-driving circuit present invention
Pixel-driving circuit, the driving method the following steps are included:
Reset phase, the auxiliary compensation module export low-voltage, and the resetting module makes the control for driving transistor
Pole is extremely connected with second, so that the voltage of control electrode is the threshold voltage for driving transistor；
Compensated stage, the auxiliary compensation module output HIGH voltage number, the threshold value compensation module to drive transistor
Control electrode be extremely connected with first so that the voltage of control electrode rises to the sum of high voltage and threshold voltage；
Data write-in and light emitting phase, the auxiliary compensation module output HIGH voltage, the resetting module and threshold compensation
Module makes the control electrode and the first pole and the second extremely equal disconnection that drive transistor, and the Data write. module is by the number of data terminal
It is believed that number write driver transistor controls pole, makes the voltage data-signal, high voltage and the threshold value that drive the control electrode of transistor
The sum of voltage, driving transistor generate driving current driving illuminating part and shine.
Preferably, the Data write. module, comprising: the first transistor and first capacitor；The control of the first transistor
Pole processed is connected with scanning end, and the first pole is connected with data terminal, and the second pole is connected with the first end of first capacitor；The first capacitor
Second end with it is described driving transistor control electrode be connected；
The threshold value compensation module includes: second transistor and the second capacitor；The control electrode of the second transistor and the
One control terminal is connected, and the first pole is extremely connected with the first of driving transistor, and the second pole is connected with the first end of the second capacitor；It is described
The second end of second capacitor is connected with the control electrode of driving transistor；
In the reset phase, the Data write. module makes the control electrode for driving transistor and the data terminal
Be connected, the data-signal of the data terminal is low-voltage, using reset the first capacitor first end voltage as low-voltage；Institute
Stating threshold value compensation module also makes the control electrode for driving transistor extremely be connected with first, to reset the first end of second capacitor
Voltage be low-voltage.
The invention has the following advantages:
The voltage of pixel-driving circuit provided by the invention, the conducting electric current of illuminating part and the output of auxiliary compensation module and
Drive transistor threshold voltage it is unrelated, thus eliminate due to be input to driving transistor DTFT voltage signal decaying with
And the influence that the variation of threshold voltage vt h generates the light emission luminance of luminescent device, also, the driving circuit of multiple illuminating parts can
To share an auxiliary compensation circuit, it might even be possible to an auxiliary compensation electricity only be arranged for the illuminating part of the sub-pixel of a full line
Road, can reduce the setting quantity of transistor in this way, to can not only reduce cost, but also aperture opening ratio and thoroughly can be improved
Rate is crossed, the current density of emitting layer material will reduce in the case where guaranteeing light emission luminance in this way, and emitting layer material is non-aging.
Detailed description of the invention
Fig. 1 is the functional block diagram of pixel-driving circuit provided in an embodiment of the present invention；
Fig. 2 is the physical circuit figure of pixel-driving circuit shown in FIG. 1；
Fig. 3 is the working timing figure of circuit diagram shown in Fig. 2；
Fig. 4 is the flow chart of the driving method of pixel-driving circuit provided in an embodiment of the present invention.
Specific embodiment
To make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing and it is embodied
Mode further retouches pixel-driving circuit provided by the present invention and its driving method, display panel and display device work in detail
It states.
Embodiment 1:
Fig. 1 is the functional block diagram of pixel-driving circuit provided in an embodiment of the present invention；Fig. 2 is pixel driver shown in FIG. 1
The physical circuit figure of circuit；Also referring to Fig. 1 and Fig. 2, pixel-driving circuit provided in an embodiment of the present invention, comprising: multiple
Illuminating part OLED, an auxiliary compensation module 201 and with the one-to-one Data write. module 301 of illuminating part OLED, resetting
Module 101, threshold value compensation module 401, driving transistor DTFT.
Auxiliary compensation module 201, with high voltage end VDD, low-voltage end VEE, voltage controling end (Pn, Qn), driving crystal
The first of pipe DTFT is extremely connected, and is used under the control of the signal of voltage controling end (Pn, Qn) selectively by high voltage end VDD
High voltage VDD and low-voltage end VEE low-voltage it is (typically grounded) give the first pole, which is indicated with Vn；Wherein, n table
Show the line n of display panel.
Module 101 is reset, is extremely connected with the control electrode and second of the second control terminal Em and driving transistor DTFT, is used for
Under the control of the second control terminal Em and when auxiliary compensation module 201 exports low-voltage, control electrode is made extremely to be connected with second, with
The voltage of control electrode is set to drive the threshold voltage vt h of transistor DTFT.Wherein, m indicates the m column of display panel.
Threshold value compensation module 401 is extremely connected with the control electrode and first of the first control terminal Sm and driving transistor DTFT, uses
Under the control in the first control terminal Sm and in 201 output HIGH voltage VDD of auxiliary compensation module) when, make control electrode and the first pole
It is connected, so that the voltage of control electrode is the sum of high voltage VDD and threshold voltage vt h (at this point, the voltage U1=VDD+ of node U1
Vth)。
Data write. module 301 is connected with the DTFT control electrode of scanning end Gn, data terminal Dm and driving transistor, is used for
Control electrode is written into the data-signal VDATA of data terminal Dm under the control of scanning end Gn, so that the voltage of control electrode is data
The sum of signal, high voltage and threshold voltage (at this point, voltage U1=VDATA+VDD+Vth of node U1).
The second pole of transistor DTFT is driven to be connected with corresponding illuminating part OLED, for generating under the control of control electrode
Driving current drives illuminating part OLED to shine.
In the present embodiment, specifically, Data write. module 301 includes: the first transistor T1 and first capacitor C1；First
The control electrode of transistor T1 is connected with scanning end Gn, and the first pole is connected with data terminal Dm, the second pole and the first of first capacitor C1
End is connected；The second end of first capacitor C1 is connected with the control electrode of driving transistor DTFT.
Threshold value compensation module 401 includes: second transistor T2 and the second capacitor C2；The control electrode of second transistor T2 and the
One control terminal Sm is connected, and the first pole is extremely connected with the first of driving transistor DTFT, the first end of the second pole and the second capacitor C2
It is connected；The second end of second capacitor C2 is connected with the control electrode of driving transistor DTFT.
Resetting module 101 includes: third transistor T3, and the control electrode of third transistor T3 is connected with the second control terminal Em,
First pole is connected with the control electrode of driving transistor DTFT, and the second pole is extremely connected with the second of driving transistor DTFT.
Auxiliary compensation module 201 includes: the 4th transistor T4, the 5th transistor T5, the 6th transistor T6 and the 7th crystal
Pipe T7；Voltage controling end includes first voltage control terminal Pn and second voltage control terminal Qn；The control electrode of 4th transistor T4 with
First voltage control terminal Pn is connected, and the first pole is connected with high voltage end VDD, output of second pole as auxiliary compensation module 201
End；The control electrode of 5th transistor T5 is connected with second voltage control terminal Qn, and the first pole is connected with high voltage end VDD, the second pole
Output end as auxiliary compensation module 201；The control electrode of 6th transistor T6 is connected with first voltage control terminal Pn, the first pole
Extremely it is connected with the first of the 7th transistor T7, output end of second pole as auxiliary compensation module 201；The control of 7th transistor T7
Pole processed is connected with second voltage control terminal Qn, and the second pole is connected with low-voltage end VSS.
Below with reference to the course of work for the pixel circuit that Fig. 3 the present invention is described in detail embodiment provides.Under for ease of description,
The face only each device of symbolically, also, it is P-type transistor that T1~T3, T6, T7, which are N-type transistor, T4 and T5,.
The t0 stage is the data write-in and light emitting phase of previous frame picture scan period, referring specifically to t3 rank hereinafter
Section.
The t1 stage (reset phase), Gn, Sm, Em, Pn and Qn be high level, Dm is low level, at this point, T1, T2, T3, T6,
T7 is opened, and T4, T5 are closed, and Vn exports low level, drives the control electrode and drain electrode (the second pole) conducting of transistor DTFT, at this point,
The voltage of the first end of the first end and C2 of C1 is reset to low level (zero), and U2 current potential is in the electricity that the t0 stage is last time light emitting phase
Pressure, in the t1 stage, U1 is connected with U2, U1=U2, at this point, being equivalent between the source-drain electrode (i.e. the first pole and the second pole) of TFT
Diode, U2 current potential can be discharged to diode cut-off, at this time U1=U2=Vth.
T2 stage (compensated stage), Gn, Pn, Em and Qn are low level, and Sm, Dm are high level, at this point, T2, T4, T7 are beaten
It opens, T1, T3, T6, T5 are closed, and Vn exports high level, will be charged to the control electrode of driving transistor DTFT by T2, U1 passes through C2
Potential will be VDD+Vth, charging terminates.
T3 stage (data write-in and light emitting phase), Sm, Em, Pn are low level, and Qn, Dm, Gn are high level, at this point, T1,
T4, T7 are opened, and T2, T3, T6, T5 are closed, and Vn exports high level, and U1 node is written by C1 in VDATA, and U1 point potential is at this time
VDATA+VDD+Vth, driving transistor DTFT conducting, illuminating part OLED shine.
In the t3 stage, driving the voltage of the control electrode of transistor DTFT is VDATA+VDD+Vth, the electricity of source electrode (the first pole)
Pressure is VDD, and driving illuminating part OLED luminous driving current I is calculated according to following formula:
I=K (Vgs-Vth)2=K (VDATA+VDD+Vth-VDD-Vth) 2, therefore, I=KVDATA2, wherein K is and drive
The technological parameter and the related constant of geometric dimension of dynamic transistor DTFT, Vgs are the control electrode and source electrode for driving transistor DTFT
Between voltage difference.
As the above analysis, the voltage and driving crystal of the conducting electric current of illuminating part OLED and the output of auxiliary compensation module
The threshold voltage vt h of pipe DTFT is unrelated, thus eliminate due to be input to driving transistor DTFT voltage signal decaying with
And the influence that the variation of threshold voltage vt h generates the light emission luminance of luminescent device.
Also, in pixel-driving circuit provided by the invention, the driving circuit of multiple illuminating parts can share an auxiliary
Compensation circuit, it might even be possible to one auxiliary compensation circuit be only set for the illuminating part of the sub-pixel of a full line, can be subtracted in this way
The setting quantity of few transistor, to can not only reduce cost, but also can be improved aperture opening ratio and transmitance, is protecting in this way
The current density of emitting layer material will reduce in the case where card light emission luminance, and emitting layer material is non-aging.
Embodiment 2
The embodiment of the present invention provides a kind of display panel, the pixel-driving circuit provided including above-described embodiment 1.
Preferably, the illuminating part and corresponding Data write. module, resetting and threshold compensation in pixel-driving circuit
Module, driving transistor are known as a sub-pixel unit；Multiple sub-pixel units are arranged along the same row interval of display panel.
Display panel provided in an embodiment of the present invention, due to using the pixel-driving circuit of the offer of above-described embodiment 1, because
This, can be improved service life and display effect, but also can reduce cost.
Embodiment 3
The embodiment of the present invention provides a kind of display device, the display panel provided including above-described embodiment 2.
Display device provided in an embodiment of the present invention, due to using the display panel of the offer of above-described embodiment 1, can
To improve service life and display effect, but also cost can be reduced.
Embodiment 4
Fig. 4 is the flow chart of the driving method of pixel-driving circuit provided in an embodiment of the present invention, incorporated by reference to Fig. 4 and figure
3, the embodiment of the present invention provides the driving method of the pixel-driving circuit of the offer of above-described embodiment 1, comprising the following steps:
Reset phase t1, auxiliary compensation module export low-voltage, and resetting module to drive the control electrode of transistor and the
Two are extremely connected, so that control electrode is discharged to the threshold voltage of driving transistor.
Compensated stage t2, auxiliary compensation module output HIGH voltage, threshold value compensation module make the control electrode for driving transistor
Extremely it is connected with first, so that the voltage of control electrode is the sum of high voltage and threshold voltage.
Data write-in and light emitting phase t3, auxiliary compensation module output HIGH voltage, resetting module and threshold value compensation module makes
The control electrode and the first pole and the second extremely equal disconnection of transistor must be driven, the data-signal of data terminal is written Data write. module
Control electrode makes the sum of control pole tension data-signal, high voltage and the threshold voltage that drive transistor, so that driving transistor
Driving current driving illuminating part is generated to shine.
In the present embodiment, referring to Fig. 2, Data write. module 301 includes: the first transistor T1 and first capacitor C2；
The control electrode of the first transistor T1 is connected with scanning end Gn, and the first pole is connected with data terminal Dm, and the second pole is with first capacitor C1's
First end is connected；The second end of the first capacitor C1 is connected with the control electrode of the driving transistor DTFT.
In this way, Data write. module 301 makes the control electrode and data terminal phase that drive transistor DTFT in reset phase
Even, the data-signal of data terminal is low-voltage, using reset the first capacitor first end voltage as low-voltage, threshold compensation
Module 401 also makes the control electrode for driving transistor extremely be connected with first, to reset the electricity of the first end of the second capacitor C2
Pressure is low-voltage.
Also specifically, referring to Fig. 2, resetting module 101 includes: third transistor T3；The control electrode of third transistor T3
It is connected with the second control terminal, the first pole is connected with the control electrode of driving transistor, the second pole phase of the second pole and driving transistor
Even；Auxiliary compensation module includes: the 4th transistor T4, the 5th transistor T5, the 6th transistor T6 and the 7th transistor T7；Voltage
Control terminal includes first voltage control terminal Pn and second voltage control terminal Qn；The control electrode and first voltage control of 4th transistor T4
End Pn processed is connected, and the first pole is connected with high voltage end, output end of second pole as auxiliary compensation module；5th transistor T5's
Control electrode is connected with second voltage control terminal Qn, and the first pole is connected with high voltage end, and the second pole is defeated as auxiliary compensation module
Outlet；The control electrode of 6th transistor T6 is connected with first voltage control terminal Pn, the first pole phase of the first pole and the 7th transistor
Even, output end of second pole as auxiliary compensation module；The control electrode of 7th transistor is connected with second voltage control terminal Qn, the
Two poles are connected with low-voltage end.
In this way, in reset phase t1, the first transistor T1, second transistor T2, third transistor T3, the 6th transistor
T6, the 7th transistor T7 are opened；4th transistor T4 and the 5th transistor T5 is closed, so that driving transistor is closed.
It is closed in compensated stage t2, the first transistor T1, third transistor T3, the 6th transistor T6, the 7th transistor T7,
Second transistor T2, the 4th transistor T4 and the 5th transistor T5 are opened, so that driving transistor is closed.
It is opened in data write-in and light emitting phase t3, the first transistor T1, the 4th transistor T4 and the 7th transistor T7, the
Two-transistor T2, third transistor T3, the 5th transistor T5 and the 6th transistor T6 are closed, so that driving transistor DTFT is opened
Driving current driving illuminating part OLED is generated to shine.
Specific driving process is referring also to the above embodiment of the present invention 1, and details are not described herein.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of pixel-driving circuit characterized by comprising multiple illuminating parts, an auxiliary compensation module and with it is described
The one-to-one Data write. module of illuminating part, resetting module, threshold value compensation module, driving transistor；
The auxiliary compensation module, with high voltage end, low-voltage end, voltage controling end, it is multiple it is described driving transistor first
Extremely it is connected, for selectively giving the low-voltage of the high voltage of high voltage end and low-voltage end under the control of voltage controling end
First pole；
The resetting module is extremely connected with the control electrode and second of the second control terminal and driving transistor, in the second control
Under the control at end processed and when auxiliary compensation module exports low-voltage, control electrode is set extremely to be connected with second, the voltage of control electrode is
Drive the threshold voltage of transistor；
The threshold value compensation module, and the first control terminal and drives the control electrode and first of transistor to be extremely connected, is used for the
Under the control of one control terminal and in auxiliary compensation module output HIGH voltage, control electrode is made extremely to be connected with first, the electricity of control electrode
Pressure is the sum of high voltage and threshold voltage；The threshold value compensation module includes: second transistor and the second capacitor；Described second is brilliant
The control electrode of body pipe is connected with the first control terminal, and the first pole is extremely connected with the first of driving transistor, the second pole and the second capacitor
First end be connected；The second end of second capacitor is connected with the control electrode of driving transistor；
The Data write. module is connected with scanning end, data terminal and control electrode, under the control of scanning end by data terminal
Data-signal control electrode is written so that the voltage of control electrode is the sum of data-signal, high voltage and threshold voltage；
Second pole of driving transistor is connected with illuminating part, drives illuminating part for generating driving current under the control of control electrode
It shines.
2. pixel-driving circuit according to claim 1, which is characterized in that
The Data write. module, comprising: the first transistor and first capacitor；
The control electrode of the first transistor is connected with scanning end, and the first pole is connected with data terminal, the second pole and first capacitor
First end is connected；
The second end of the first capacitor is connected with the control electrode of the driving transistor.
3. pixel-driving circuit according to claim 1, which is characterized in that the resetting module includes: third transistor；
The control electrode of the third transistor is connected with the second control terminal, and the first pole is connected with the control electrode of driving transistor, the
Two poles are extremely connected with the second of driving transistor.
4. pixel-driving circuit according to claim 1, which is characterized in that the auxiliary compensation module includes: the 4th crystalline substance
Body pipe, the 5th transistor, the 6th transistor and the 7th transistor；
The voltage controling end includes first voltage control terminal and second voltage control terminal；
The control electrode of 4th transistor is connected with first voltage control terminal, and the first pole is connected with high voltage end, and the second pole is made
For the output end for assisting compensating module；
The control electrode of 5th transistor is connected with second voltage control terminal, and the first pole is connected with high voltage end, and the second pole is made
For the output end for assisting compensating module；
The control electrode of 6th transistor is connected with first voltage control terminal, the first pole phase of the first pole and the 7th transistor
Even, output end of second pole as auxiliary compensation module；
The control electrode of 7th transistor is connected with second voltage control terminal, and the second pole is connected with low-voltage end.
5. a kind of display panel, which is characterized in that including pixel-driving circuit described in claim 1-4 any one.
6. display panel according to claim 5, which is characterized in that an illuminating part and corresponding Data write. module,
Resetting module, threshold value compensation module, driving transistor are known as a sub-pixel unit；
Multiple sub-pixel units are arranged along the same row interval of the display panel.
7. a kind of display device, which is characterized in that including display panel as claimed in any one of claims 5 to 6.
8. a kind of driving method of pixel-driving circuit, which is characterized in that the pixel-driving circuit is that claim 1-4 is any
Pixel-driving circuit described in one, the driving method the following steps are included:
Reset phase, the auxiliary compensation module export low-voltage, the resetting module to drive the control electrode of transistor with
Second is extremely connected, so that the voltage of control electrode is the threshold voltage for driving transistor；
Compensated stage, the auxiliary compensation module output HIGH voltage number, the threshold value compensation module make the control for driving transistor
Pole processed is extremely connected with first, so that the voltage of control electrode rises to the sum of high voltage and threshold voltage；
Data write-in and light emitting phase, the auxiliary compensation module output HIGH voltage, the resetting module and threshold value compensation module
So that the control electrode and the first pole and the second extremely equal disconnection of driving transistor, the Data write. module believe the data of data terminal
The control electrode of number write driver transistor keeps the voltage data-signal, high voltage and threshold value that drive the control electrode of transistor electric
The sum of pressure, driving transistor generate driving current driving illuminating part and shine.
9. the driving method of pixel-driving circuit according to claim 8, which is characterized in that the Data write. module,
It include: the first transistor and first capacitor；The control electrode of the first transistor is connected with scanning end, the first pole and data terminal phase
Even, the second pole is connected with the first end of first capacitor；The control electrode of the second end of the first capacitor and the driving transistor
It is connected；
The threshold value compensation module includes: second transistor and the second capacitor；The control electrode of the second transistor and the first control
End processed is connected, and the first pole is extremely connected with the first of driving transistor, and the second pole is connected with the first end of the second capacitor；Described second
The second end of capacitor is connected with the control electrode of driving transistor；
In the reset phase, the Data write. module makes the control electrode and the data terminal phase of the driving transistor
Even, the data-signal of the data terminal is low-voltage, using reset the first capacitor first end voltage as low-voltage；It is described
Threshold value compensation module also makes the control electrode for driving transistor extremely be connected with first, to reset the first end of second capacitor
Voltage is low-voltage.
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| CN109920377B (en) * | 2018-06-14 | 2020-10-16 | 友达光电股份有限公司 | Pixel circuit and driving method thereof |
| CN111199712A (en) * | 2018-11-16 | 2020-05-26 | 上海和辉光电有限公司 | Pixel compensation circuit and display device |
| CN112419963A (en) * | 2019-08-19 | 2021-02-26 | 群创光电股份有限公司 | Light emitting device and display apparatus |
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| CN104036726A (en) * | 2014-05-30 | 2014-09-10 | 京东方科技集团股份有限公司 | Pixel circuit and driving method, organic light-emitting diode (OLED) display panel and device thereof |
| CN105405395A (en) * | 2016-01-04 | 2016-03-16 | 京东方科技集团股份有限公司 | Pixel structure, driving method thereof and relevant display device |
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| CN105609051A (en) * | 2016-01-05 | 2016-05-25 | 京东方科技集团股份有限公司 | Pixel circuit, display panel, and display apparatus |
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| CN104036726A (en) * | 2014-05-30 | 2014-09-10 | 京东方科技集团股份有限公司 | Pixel circuit and driving method, organic light-emitting diode (OLED) display panel and device thereof |
| CN105405395A (en) * | 2016-01-04 | 2016-03-16 | 京东方科技集团股份有限公司 | Pixel structure, driving method thereof and relevant display device |
| CN105427808A (en) * | 2016-01-04 | 2016-03-23 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method therefor and display device |
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