CN107452332B - A kind of pixel-driving circuit and its driving method and display device - Google Patents
A kind of pixel-driving circuit and its driving method and display device Download PDFInfo
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- CN107452332B CN107452332B CN201710749836.5A CN201710749836A CN107452332B CN 107452332 B CN107452332 B CN 107452332B CN 201710749836 A CN201710749836 A CN 201710749836A CN 107452332 B CN107452332 B CN 107452332B
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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- Engineering & Computer Science (AREA)
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a kind of pixel-driving circuit and its driving method and display device.The pixel-driving circuit includes the first reset circuit, charging circuit, the second reset circuit, driving circuit and driving tube, further includes pull-down circuit, the first reset circuit is for resetting the grid of driving tube；Charging circuit is for charging to the grid of driving tube；Second reset circuit is for resetting the anode of light-emitting component；Driving circuit for driving light-emitting component to shine jointly with driving tube；Pull-down circuit is for dragging down the grid potential of driving tube, to increase the gate source voltage of driving tube.The pixel-driving circuit passes through setting pull-down circuit, the grid potential of driving tube can be dragged down in the course of work of driving tube, to increase the gate source voltage of driving tube, the charge quick release accumulated on interface to enable the active layer of driving tube and gate insulation layer to contact with each other, and then the duration of the image retention occurred during display is greatly shortened, improve afterimage phenomena.
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 and display
Device.
Background technique
In the pixel-driving circuit of OLED (organic electroluminescent) display device, due to the hesitation of driving tube,
OLED product display when ninsolid color screen switching during will appear image retention, as OLED product is lighting one section of black and white screen
When being switched to ater picture after the time, it will appear image retention.Image retention can disappear over time, but different OLED products is residual
It has nothing in common with each other due to the appearance duration of picture is different because of the hesitation of its driving tube the case where.
The hesitation of driving tube refers to driving tube during the work time, on the contact interface of active layer and gate insulation layer
A certain amount of charge can be accumulated, if the rate of release of this partial buildup charge is too slow, will lead to show picture in ninsolid color
Occurs image retention when switching.The rate of release of stored charge is slower, then the appearance duration of image retention is longer, seriously affects the view of viewer
Feel experience.
Therefore, how to eliminate OLED and show that image retention of product during display has become current urgent problem to be solved.
Summary of the invention
The present invention is directed to the above-mentioned technical problems in the prior art, provides a kind of pixel-driving circuit and its driving side
Method and display device.The pixel-driving circuit, can be in the course of work of driving tube by driving tube by setting pull-down circuit
Grid potential drag down, with increase driving tube gate source voltage (i.e. driving tube grid and source electrode between voltage), to make to drive
The charge accumulated on the interface that the active layer and gate insulation layer of dynamic pipe contact with each other can quick release, and then make driving tube in work
It is faster stable during making, so that the duration of image retention greatly shortens when ninsolid color display screen switching during display, change
It has been apt to the visual experience of people.
The present invention provides a kind of pixel-driving circuit, including the first reset circuit, charging circuit, the second reset circuit, drive
Dynamic circuit and driving tube, further include pull-down circuit, and the pull-down circuit connects first reset circuit；Described first resets electricity
Road, the driving circuit, the charging circuit are all connected with the driving tube；Second reset circuit and the driving circuit are equal
Connect the anode of light-emitting component；The driving circuit connects the first electric potential signal；The second electricity of cathode connection of the light-emitting component
Position signal；
First reset circuit is used under the control of reset signal, the 5th electric potential signal and third electric potential signal to institute
The grid for stating driving tube is resetted；
The charging circuit is used under the control of nth grid line scanning signal and data-signal to the grid of the driving tube
It charges pole；
Second reset circuit is used under the control of the nth grid line scanning signal and the 4th electric potential signal to institute
The anode for stating light-emitting component is resetted；
The driving circuit for driving the luminous member jointly under the control of driving control signal with the driving tube
Part shines；
The pull-down circuit is used to drag down the grid potential of the driving tube under the control of the 5th electric potential signal,
To increase the gate source voltage of the driving tube.
Preferably, the pull-down circuit includes the second capacitor and the 7th switching tube；
The grid of 7th switching tube connects the reset signal, the first pole connection of the 7th switching tube described the
Three electric potential signals, the second pole of the 7th switching tube connect second capacitor the first pole and first reset circuit；
Second pole of second capacitor connects first reset circuit and the 5th electric potential signal.
Preferably, first reset circuit includes first switch tube and first capacitor；
The grid of the first switch tube connects the first pole of second capacitor and the second pole of the 7th switching tube,
First pole of the first switch tube connect second capacitor the second pole and the 5th electric potential signal, the first switch
Second pole of pipe connects the grid and the charging circuit of the first pole of the first capacitor, the driving tube；
Second pole of the first capacitor connects first electric potential signal and the driving circuit.
Preferably, the charging circuit includes second switch and third switching tube；
The grid of the second switch connects the nth grid line scanning signal, the first pole of the second switch
The grid of the driving tube is connected, the second pole of the second switch connects the second pole and the driving electricity of the driving tube
Road；
The grid of the third switching tube connects the nth grid line scanning signal, the first pole of the third switching tube
Connect the data-signal, the second pole of the third switching tube connect the driving tube the first pole and the driving circuit.
Preferably, the driving circuit includes the 4th switching tube and the 5th switching tube；
The grid of 4th switching tube connects the driving control signal, and the first pole of the 4th switching tube connects institute
The first electric potential signal is stated, the second pole of the 4th switching tube connects the first pole of the driving tube；
The grid of 5th switching tube connects the driving control signal, and the first pole of the 5th switching tube connects institute
The second pole of driving tube is stated, the second pole of the 5th switching tube connects the anode of the light-emitting component and described second and resets electricity
Road.
Preferably, second reset circuit includes the 6th switching tube；
The grid of 6th switching tube connects the nth grid line scanning signal, the first pole of the 6th switching tube
The 4th electric potential signal is connected, the second pole of the 6th switching tube connects the anode of the light-emitting component.
Preferably, the first switch tube, the second switch, the third switching tube, the 4th switching tube, institute
It states the 5th switching tube, the 6th switching tube, the 7th switching tube and the driving tube and is all made of PMOS tube.
Preferably, the reset signal is the n-th -2 grid line scanning signals；5th electric potential signal is alternating voltage letter
Number；First electric potential signal is greater than second electric potential signal；The third electric potential signal and the 4th electric potential signal are equal
For d. c. voltage signal.
The present invention also provides a kind of display devices, including above-mentioned pixel-driving circuit.
The present invention also provides a kind of driving methods of above-mentioned pixel-driving circuit, comprising:
Reseting stage, the first reset circuit are right under the control of reset signal, the 5th electric potential signal and third electric potential signal
The grid of driving tube is resetted；
Drop-down stage, pull-down circuit draw the grid potential of the driving tube under the control of the 5th electric potential signal
It is low, to increase the gate source voltage of the driving tube；
Charging stage, charging circuit is under the control of nth grid line scanning signal and data-signal to the driving tube
Grid charges, to compensate the threshold voltage of the driving tube；Meanwhile second reset circuit scanned in the nth grid line
The anode of light-emitting component is resetted under the control of signal and the 4th electric potential signal；
It shines the driving stage, driving circuit drives the hair with the driving tube under the control of driving control signal jointly
Optical element shines.
Beneficial effects of the present invention: pixel-driving circuit provided by the present invention can driven by the way that pull-down circuit is arranged
The grid potential of driving tube is dragged down in the course of work of dynamic pipe, with increase driving tube gate source voltage (i.e. driving tube grid and
Voltage between source electrode), thus the charge accumulated on the interface for enabling the active layer of driving tube and gate insulation layer to contact with each other
Quick release, and then keep driving tube faster stable during the work time, when so that ninsolid color showing screen switching during display
The duration of image retention greatly shortens, and improves the visual experience of people.
Display device provided by the present invention was showing the display device by using above-mentioned pixel-driving circuit
Ninsolid color shows that image retention duration when screen switching greatly shortens in journey, imitates so as to improve the display of the display device
Fruit.
Detailed description of the invention
Fig. 1 is the circuit diagram of pixel-driving circuit in the embodiment of the present invention 1；
Fig. 2 is the circuit diagram of pixel-driving circuit in the embodiment of the present invention 1；
Fig. 3 be the embodiment of the present invention 1 in pixel-driving circuit reseting stage circuit diagram；
Fig. 4 be the embodiment of the present invention 1 in pixel-driving circuit reseting stage timing diagram；
Fig. 5 be the embodiment of the present invention 1 in pixel-driving circuit drop-down the stage circuit diagram；
Fig. 6 be the embodiment of the present invention 1 in pixel-driving circuit drop-down the stage timing diagram；
Fig. 7 be the embodiment of the present invention 1 in pixel-driving circuit the charging stage circuit diagram；
Fig. 8 be the embodiment of the present invention 1 in pixel-driving circuit the charging stage timing diagram；
Fig. 9 is pixel-driving circuit in the embodiment of the present invention 1 in the circuit diagram in driving stage that shines；
Figure 10 is pixel-driving circuit in the embodiment of the present invention 1 in the timing diagram in driving stage that shines.
Description of symbols therein:
1. the first reset circuit；2. charging circuit；3. the second reset circuit；4. driving circuit；5. pull-down circuit.
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 is described in further detail a kind of pixel-driving circuit provided by the present invention and its driving method and display device.
Embodiment 1:
The present embodiment provides a kind of pixel-driving circuits, as depicted in figs. 1 and 2, including the first reset circuit 1, charging electricity
Road 2, the second reset circuit 3, driving circuit 4 and driving tube T8, further include pull-down circuit 5, and the connection of pull-down circuit 5 first resets electricity
Road 1；First reset circuit 1, driving circuit 4, charging circuit 2 are all connected with driving tube T8；Second reset circuit 3 and driving circuit 4
It is all connected with the anode of light-emitting component D1；Driving circuit 4 connects the first electric potential signal ELVDD；The cathode connection the of light-emitting component D1
Two electric potential signal ELVSS.First reset circuit 1 is used to believe in reset signal RST, the 5th electric potential signal VINT1 and third current potential
The grid of driving tube T8 is resetted under the control of number VGL.Charging circuit 2 is used in nth grid line scanning signal Gate (n)
It charges under control with data-signal Data to the grid of driving tube T8.Second reset circuit 3 in nth grid line for sweeping
It retouches and the anode of light-emitting component D1 is resetted under the control of signal Gate (n) and the 4th electric potential signal VINT.Driving circuit 4 is used
Light-emitting component D1 is driven to shine jointly with driving tube T8 under the control in driving control signal EM.Pull-down circuit 5 is used for the
The grid potential of driving tube T8 is dragged down under the control of five electric potential signal VINT1, to increase the gate source voltage of driving tube T8.
The pixel-driving circuit, can be in the course of work of driving tube T8 by driving tube T8 by setting pull-down circuit 5
Grid potential drag down, to increase the gate source voltage (voltage i.e. between driving tube T8 grid and source electrode) of driving tube T8, thus
Enable the active layer of driving tube T8 and interface that gate insulation layer contacts with each other on the charge quick release accumulated, and then make to drive
Pipe T8 is faster stable during the work time so that display during ninsolid color show screen switching when image retention duration significantly
Shorten, improves the visual experience of people.
In the present embodiment, pull-down circuit 5 includes the second capacitor C2 and the 7th switch transistor T 7；The grid of 7th switch transistor T 7 connects
Reset signal RST is met, the first pole of the 7th switch transistor T 7 connects third electric potential signal VGL, and the second pole of the 7th switch transistor T 7 connects
Connect the first pole and the first reset circuit 1 of the second capacitor C2；The second pole of second capacitor C2 connects the first reset circuit 1 and the 5th
Electric potential signal VINT1.
Wherein, the 5th electric potential signal VINT1 is ac voltage signal.5th electric potential signal VINT1 is used for reset drives pipe
The grid potential of T8 is also used to further be dragged down the grid potential of driving tube T8, to increase the grid source electricity of driving tube T8
Pressure, thus the charge quick release accumulated on the interface for enabling the active layer of driving tube T8 and gate insulation layer to contact with each other, into
And greatly shorten the duration of image retention when ninsolid color shows screen switching during showing.In addition, reset signal RST can be with
It is the reset signal RST inputted on an independent increased reseting signal line, the n-th -2 grid line scanning signals can also be used
Gate(n-2)。
In the present embodiment, the first reset circuit 1 includes first switch tube T1 and first capacitor C1；The grid of first switch tube T1
Pole connects the first pole of the second capacitor C2 and the second pole of the 7th switch transistor T 7, the second electricity of the first pole connection of first switch tube T1
Hold the first pole of the second pole of C2 and the second pole connection first capacitor C1 of the 5th electric potential signal VINT1, first switch tube T1, drive
The grid and charging circuit 2 of dynamic pipe T8；The second pole of first capacitor C1 connects the first electric potential signal ELVDD and driving circuit 4.Its
In, third electric potential signal VGL is d. c. voltage signal, which can make first switch tube T1 to the grid of driving tube T8
Pole carries out stablizing reset.
In the present embodiment, charging circuit 2 includes second switch T2 and third switch transistor T 3；The grid of second switch T2
It connects nth grid line scanning signal Gate (n), the grid of the first pole connection driving tube T8 of second switch T2, second switch
The second pole of the second pole connection driving tube T8 of pipe T2 and driving circuit 4；The grid connection nth grid line of third switch transistor T 3 is swept
Signal Gate (n) is retouched, the first pole of third switch transistor T 3 connects data-signal Data, and the second pole of third switch transistor T 3, which connects, drives
The first pole of dynamic pipe T8 and driving circuit 4.
In the present embodiment, the second reset circuit 3 includes the 6th switch transistor T 6；The grid of 6th switch transistor T 6 connects nth
Grid line scanning signal Gate (n), the first pole of the 6th switch transistor T 6 connect the 4th electric potential signal VINT, and the of the 6th switch transistor T 6
The anode of two poles connection light-emitting component D1.Wherein, the 4th electric potential signal VINT is d. c. voltage signal, the d. c. voltage signal energy
It is enough that the anode of light-emitting component D1 is carried out stablizing reset.
In the present embodiment, driving circuit 4 includes the 4th switch transistor T 4 and the 5th switch transistor T 5；The grid of 4th switch transistor T 4
Connecting driving control signal EM, the first pole of the 4th switch transistor T 4 connects the first electric potential signal ELVDD, and the of the 4th switch transistor T 4
The first pole of two poles connection driving tube T8；The grid of 5th switch transistor T 5 connects driving control signal EM, the 5th switch transistor T 5
First pole connects the second pole of driving tube T8, and the anode and second of the second pole connection light-emitting component D1 of the 5th switch transistor T 5 resets
Circuit 3.Wherein, light-emitting component D1 uses light emitting diode.First electric potential signal ELVDD is greater than the second electric potential signal ELVSS, such as
This setting, can be realized the normal driving to light-emitting component D1.
In the present embodiment, first switch tube T1, second switch T2, third switch transistor T 3, the 4th switch transistor T the 4, the 5th are opened
It closes pipe T5, the 6th switch transistor T 6, the 7th switch transistor T 7 and driving tube T8 and is all made of PMOS tube.
Foregoing circuit structure based on pixel-driving circuit, the present embodiment also provide a kind of driving of pixel-driving circuit
Method, as shown in Fig. 3-Figure 10, comprising:
Reseting stage S1, as shown in Figure 3 and Figure 4, the first reset circuit is in reset signal RST, the 5th electric potential signal VINT1
The grid of driving tube T8 is resetted under control with third electric potential signal VGL.
At this stage, reset signal RST is low level, and the 7th switch transistor T 7 is opened, and the grid of first switch tube T1 is filled with
Third electric potential signal VGL, third electric potential signal VGL are negative DC voltage signal, and first switch tube T1 is opened, the grid of driving tube T8
Pole (i.e. NET3 point) current potential is reset to the 5th electric potential signal VINT1 in the stage, and charges to first capacitor C1.
Drop-down stage S2, as shown in Figure 5 and Figure 6, pull-down circuit is under the control of the 5th electric potential signal VINT1 by driving tube
The grid potential of T8 drags down, to increase the gate source voltage of driving tube T8.
At this stage, reset signal RST is high level, and the 7th switch transistor T 7 turns off, and the grid of first switch tube T1 is in
The voltage of suspended state, the 5th electric potential signal VINT1 is further dragged down relative to reseting stage S1, in the coupling of the second capacitor C2
Under effect, first switch tube T1 is still opened, and is further dragged down the grid potential of driving tube T8 (i.e. by first switch tube T1
The current potential of NET3 point is further dragged down)；Relative to existing pixel-driving circuit, this increases the gate source voltage of driving tube T8
Greatly, so that the charge accumulated on the interface for enabling the active layer of driving tube T8 and gate insulation layer to contact with each other is in the shorter time
Interior release eliminates the removable ion between driving tube T8 active layer and gate insulation layer on interface within the shorter time,
And then keep the driving tube T8 faster stable during the work time, so that image retention is held when ninsolid color shows screen switching during display
The continuous time greatly shortens, and improves the visual experience of people.
Charging stage S3, as shown in Figure 7 and Figure 8, charging circuit in nth grid line scanning signal Gate (n) sum number it is believed that
It charges under the control of number Data to the grid of driving tube T8, to compensate the threshold voltage of driving tube T8；Meanwhile second resets
Circuit under the control of nth grid line scanning signal Gate (n) and the 4th electric potential signal VINT to the anode of light-emitting component D1 into
Row resets.
At this stage, the voltage high of the 5th electric potential signal VINT1 is made to a certain positive voltage in the coupling of the second capacitor C2
Under, the grid of first switch tube T1 inputs positive voltage, turns off first switch tube T1；It keeps making in the current potential of first capacitor C1
Under, NET3 point current potential keeps low level, and driving tube T8 is kept it turning on；Meanwhile nth grid line scanning signal Gate (n) is low
Level, second switch T2 and third switch transistor T 3 are opened, continue to charge to NET3 point, until by the grid of driving tube T8
Charge to its grid voltage Vgate=VData+Vth, wherein Vth is the threshold voltage of driving tube T8, at this point, driving tube T8 fills
Electricity reaches saturation state, stops charging；The secondary charging realizes the compensation to driving tube T8 threshold voltage.At this stage simultaneously,
6th switch transistor T 6 is also opened, and the anode of light-emitting component D1 passes through the 4th electric potential signal of low-voltage that the 6th switch transistor T 6 inputs
VINT is resetted.
Shine driving stage S4, as shown in Figure 9 and Figure 10, driving circuit under the control of driving control signal EM with driving
Pipe T8 drives light-emitting component D1 to shine jointly.
At this stage, driving tube T8 is kept it turning on after charging reaches saturation state；Driving control signal EM is low level,
4th switch transistor T 4 and the 5th switch transistor T 5 are opened, and the first electric potential signal ELVDD charges to the anode of light-emitting component D1 and makes it
It shines.
It should be noted that the driving of each pixel is all made of above-mentioned driving method in the present embodiment, by drop-down rank
Section S2, pull-down circuit drag down the grid potential of driving tube T8 under the control of the 5th electric potential signal VINT1, are capable of increasing driving
The gate source voltage of pipe T8, thus the charge accumulated on the interface for enabling the active layer of driving tube T8 and gate insulation layer to contact with each other
It discharges, i.e., is eliminated within the shorter time between driving tube T8 active layer and gate insulation layer on interface within the shorter time
Removable ion, and then keep driving tube T8 faster stable during the work time, so that ninsolid color shows that picture is cut during display
The duration of image retention greatly shortens when changing, and improves the visual experience of people.
Embodiment 1 the utility model has the advantages that pixel-driving circuit provided in embodiment 1, can by the way that pull-down circuit is arranged
The grid potential of driving tube is dragged down in the course of work of driving tube, to increase gate source voltage (the i.e. driving tube grid of driving tube
Voltage between pole and source electrode), thus the charge accumulated on the interface for making the active layer of driving tube and gate insulation layer contact with each other
Can quick release, and then keep driving tube faster stable during the work time, so that ninsolid color shows that picture is cut during display
The duration of image retention greatly shortens when changing, and improves the visual experience of people.
Embodiment 2:
The present embodiment provides a kind of display devices, including the pixel-driving circuit in embodiment 1.
By using the pixel-driving circuit in embodiment 1, display device ninsolid color during display is made to show picture
Image retention duration when face switches greatly shortens, so as to improve the display effect of the display device.
Display device provided by the present invention can appoint for oled panel, OLED TV, display, mobile phone, navigator etc.
What products or components having a display function.
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, including the first reset circuit, charging circuit, the second reset circuit, driving circuit and driving
Pipe, which is characterized in that further include pull-down circuit, the pull-down circuit connects first reset circuit；Described first resets electricity
Road, the driving circuit, the charging circuit are all connected with the driving tube；Second reset circuit and the driving circuit are equal
Connect the anode of light-emitting component；The driving circuit connects the first electric potential signal；The second electricity of cathode connection of the light-emitting component
Position signal；
First reset circuit is used under the control of reset signal, the 5th electric potential signal and third electric potential signal to the drive
The grid of dynamic pipe is resetted；
The charging circuit be used under the control of nth grid line scanning signal and data-signal to the grid of the driving tube into
Row charging；
Second reset circuit is used under the control of the nth grid line scanning signal and the 4th electric potential signal to the hair
The anode of optical element is resetted；
The driving circuit is used under the control of driving control signal that the light-emitting component to be driven to send out jointly with the driving tube
Light；
The pull-down circuit is for dragging down the grid potential of the driving tube under the control of the 5th electric potential signal, to increase
The gate source voltage of the big driving tube；
The pull-down circuit includes the second capacitor and the 7th switching tube；The grid of 7th switching tube connects the reset letter
Number, the first pole of the 7th switching tube connects the third electric potential signal, described in the second pole connection of the 7th switching tube
First pole of the second capacitor and first reset circuit；Second pole of second capacitor connect first reset circuit and
5th electric potential signal.
2. pixel-driving circuit according to claim 1, which is characterized in that first reset circuit includes first switch
Pipe and first capacitor；
The grid of the first switch tube connects the first pole of second capacitor and the second pole of the 7th switching tube, described
First pole of first switch tube connect second capacitor the second pole and the 5th electric potential signal, the first switch tube
Second pole connects the grid and the charging circuit of the first pole of the first capacitor, the driving tube；
Second pole of the first capacitor connects first electric potential signal and the driving circuit.
3. pixel-driving circuit according to claim 2, which is characterized in that the charging circuit include second switch and
Third switching tube；
The grid of the second switch connects the nth grid line scanning signal, the first pole connection of the second switch
The grid of the driving tube, the second pole of the second switch connect the driving tube the second pole and the driving circuit；
The grid of the third switching tube connects the nth grid line scanning signal, the first pole connection of the third switching tube
The data-signal, the second pole of the third switching tube connect the driving tube the first pole and the driving circuit.
4. pixel-driving circuit according to claim 3, which is characterized in that the driving circuit include the 4th switching tube and
5th switching tube；
The grid of 4th switching tube connects the driving control signal, the first pole connection of the 4th switching tube described the
Second pole of one electric potential signal, the 4th switching tube connects the first pole of the driving tube；
The grid of 5th switching tube connects the driving control signal, and the first pole of the 5th switching tube connects the drive
Second pole of dynamic pipe, the second pole of the 5th switching tube connects the anode and second reset circuit of the light-emitting component.
5. pixel-driving circuit according to claim 4, which is characterized in that second reset circuit includes the 6th switch
Pipe；
The grid of 6th switching tube connects the nth grid line scanning signal, the first pole connection of the 6th switching tube
Second pole of the 4th electric potential signal, the 6th switching tube connects the anode of the light-emitting component.
6. pixel-driving circuit according to claim 5, which is characterized in that the first switch tube, the second switch
Pipe, the third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube
PMOS tube is all made of with the driving tube.
7. pixel-driving circuit according to claim 6, which is characterized in that the reset signal is that the n-th -2 grid lines are swept
Retouch signal；5th electric potential signal is ac voltage signal；First electric potential signal is greater than second electric potential signal；Institute
Stating third electric potential signal and the 4th electric potential signal is d. c. voltage signal.
8. a kind of display device, which is characterized in that including pixel-driving circuit described in claim 1-7 any one.
9. a kind of driving method of the pixel-driving circuit as described in claim 1-7 any one characterized by comprising
Reseting stage, the first reset circuit is under the control of reset signal, the 5th electric potential signal and third electric potential signal to driving
The grid of pipe is resetted；
Drop-down stage, pull-down circuit drag down the grid potential of the driving tube under the control of the 5th electric potential signal, with
Increase the gate source voltage of the driving tube；
Charging stage, charging circuit is under the control of nth grid line scanning signal and data-signal to the grid of the driving tube
It charges, to compensate the threshold voltage of the driving tube；Meanwhile second reset circuit in the nth grid line scanning signal
The anode of light-emitting component is resetted under control with the 4th electric potential signal；
It shines the driving stage, driving circuit drives the luminous member jointly under the control of driving control signal with the driving tube
Part shines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108538248A (en) * | 2018-04-24 | 2018-09-14 | 京东方科技集团股份有限公司 | A kind of pixel circuit, driving method, display panel and display device |
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| CN103065592A (en) * | 2012-12-13 | 2013-04-24 | 京东方科技集团股份有限公司 | Shift register unit and driving method, gate drive circuit and displaying device thereof |
| CN106531076A (en) * | 2017-01-12 | 2017-03-22 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and driving method thereof |
| CN107068066A (en) * | 2017-06-22 | 2017-08-18 | 京东方科技集团股份有限公司 | Pixel compensation circuit and display device, driving method |
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| JP2008170788A (en) * | 2007-01-12 | 2008-07-24 | Hitachi Displays Ltd | Image display device |
| TWI436335B (en) * | 2011-03-17 | 2014-05-01 | Au Optronics Corp | Organic light emitting display having threshold voltage compensation mechanism and driving method thereof |
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| CN103065592A (en) * | 2012-12-13 | 2013-04-24 | 京东方科技集团股份有限公司 | Shift register unit and driving method, gate drive circuit and displaying device thereof |
| CN106531076A (en) * | 2017-01-12 | 2017-03-22 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and driving method thereof |
| CN107068066A (en) * | 2017-06-22 | 2017-08-18 | 京东方科技集团股份有限公司 | Pixel compensation circuit and display device, driving method |
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