CN109872682A - Pixel compensation circuit and display device - Google Patents
Pixel compensation circuit and display device Download PDFInfo
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- CN109872682A CN109872682A CN201910244259.3A CN201910244259A CN109872682A CN 109872682 A CN109872682 A CN 109872682A CN 201910244259 A CN201910244259 A CN 201910244259A CN 109872682 A CN109872682 A CN 109872682A
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- switching tube
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- compensation circuit
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- pixel compensation
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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]
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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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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
This announcement provides a kind of pixel compensation circuit and display device, the pixel compensation circuit includes driving switch pipe, first to the 5th switching tube, storage capacitance and light-emitting component, pass through the pixel compensation circuit, both it may be implemented to reduce or eliminate influence of the drift of the threshold voltage vt h of driving thin film transistor (TFT) to OLED driving current, the influence that the pressure drop of supply voltage VDD is drifted about to OLED driving current can also be reduced or eliminated simultaneously, the compensation of the pressure drop drift to the threshold voltage vt h and supply voltage VDD of driving thin film transistor (TFT) can be achieved at the same time, be conducive to improve the uniformity of the light emission luminance of light-emitting component.
Description
Technical field
This announcement is related to field of display technology more particularly to a kind of pixel compensation circuit and display device.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) display technology is as novel display
Technology, with the incomparable many advantages of some other display technology, such as wide viewing angle, wide colour gamut, high contrast, low-power consumption
The advantages that with foldable/flexibility, thus it has strong competitiveness, OLED display technology root in new generation display technology
It is divided into passive OLED (Passive Matrix OLED, PMOLED) display technology and active OLED (Active according to its driving method
Matrix OLED, AMOLED) display technology, wherein AMOLED display technology is a kind of applied to the aobvious of TV and mobile device
Show technology, had broad application prospects in the mancarried electronic aid to sensitive power consumption with its low-power consumption, large-sized feature,
AMOLED display technology is one of the prior development direction of current flexible display technologies simultaneously.
As shown in Figure 1, it includes a switching thin-film transistor that the base pixel driving circuit of AMOLED, which is 2T1C circuit,
Switch Thin Film Transistor (STFT, T1), a driving thin film transistor (TFT) Driver TFT (DTFT, T2) and
One storage capacitance Cst.The driving current of OLED is controlled by DTFT, IOLEDCorrespond to gate source voltage Vgs for driving transistor M1
Electric current, size are as follows: IOLED=k (Vgs-Vth)2, wherein k is the current amplification factor of DTFT, is determined by DTFT self attributes
Fixed, Vth is the threshold voltage of DTFT.It is restricted because of DTFT by the homogeneity of making technology and with factors such as the decaying for using the time,
So that its threshold voltage vt h easily drifts about, OLED driving current is caused easily to change, so that OLED shows image not
Uniformly, image quality is influenced.
Existing widely to be approved and apply to be a kind of 6T1C pixel compensation circuit by industry at present, the circuit is by 6 TFT
It is constituted with 1 storage capacitance, the although caused AMOLED picture of Vth drift which eliminates DTFT is shown not
Equal problem, however, the pressure drop drift of supply voltage VDD can then seriously affect the electric current of OLED.
Accordingly, it is desirable to provide a kind of new pixel compensation circuit and display device, to solve above-mentioned technical problem.
Summary of the invention
This announcement provides a kind of pixel compensation circuit and display device, solves pixel compensation circuit and display device,
Shadow of the OLED driving current vulnerable to the drift of driving thin film transistor (TFT) threshold voltage vt h and the pressure drop drift of supply voltage VDD
The technical issues of ringing and change, causing OLED to show that image is uneven, influence image quality.
To solve the above problems, the technical solution that this announcement provides is as follows:
This announcement embodiment provides a kind of pixel compensation circuit, comprising:
Driving switch pipe, the driving switch pipe include first end, second end and control terminal, the institute of the driving switch pipe
It states first end and connects the first power supply signal；
First switch tube, the first switch tube include first end, second end and control terminal, the institute of the first switch tube
It states first end to connect with the control terminal of the driving switch pipe, the second end and the driving of the first switch tube
The second end of switching tube connects, and the control terminal of the first switch tube connects the first scanning signal；
Second switch, the second switch include first end, second end and control terminal, the institute of the second switch
First end connection resetting voltage is stated, the control terminal of the second switch connects the second scanning signal；
Third switching tube, the third switching tube include first end, second end and control terminal, the institute of the third switching tube
First end connection data-signal is stated, the control terminal of the third switching tube connects first scanning signal；
4th switching tube, the 4th switching tube include first end, second end and control terminal, the institute of the 4th switching tube
First end ground connection is stated, the second end of the 4th switching tube connects the second end of the third switching tube, and described the
The control terminal of four switching tubes connects first control signal；
5th switching tube, the 5th switching tube include first end, second end and control terminal, the institute of the 5th switching tube
It states first end and connects the second end of the driving switch pipe and the second end of the first switch tube, the described 5th
The control terminal of switching tube connects second control signal；
Storage capacitance, the storage capacitance have first end and second end, and the first end of the storage capacitance connects
The second end of the second end of the third switching tube and the 4th switching tube, described the of the storage capacitance
Two ends connect the control terminal of the driving switch pipe, the first end of the first switch tube and the second switch
The second end of pipe；And
Light-emitting component, the light-emitting component have anode tap and cathode terminal, and the anode tap of the light-emitting component connects
The cathode terminal of the second end of 5th switching tube, the light-emitting component connects second source signal.
It is the driving switch pipe, the first switch tube, described in the pixel compensation circuit that this announcement embodiment provides
Second switch, the third switching tube, the 4th switching tube and the 5th switching tube are thin film transistor (TFT), wherein
The first end of the thin film transistor (TFT) is source electrode, and second end is drain electrode and control terminal is grid.
It is the driving switch pipe, the first switch tube, described in the pixel compensation circuit that this announcement embodiment provides
Second switch, the third switching tube, the 4th switching tube and the 5th switching tube be P-type TFT or
It is N-type TFT.
In the pixel compensation circuit that this announcement embodiment provides, the driving process of the pixel compensation circuit includes resetting
Stage, compensated stage and light emitting phase, in which:
The reseting stage: using first scanning signal, second scanning signal, the first control signal and
The second control signal is connected the second switch and the 4th switching tube and turns off the driving switch pipe, described the
One switching tube, the third switching tube and the 5th switching tube；
The compensated stage: using first scanning signal, second scanning signal, the first control signal and
The second control signal is connected the first switch tube and the third switching tube and turns off the driving switch pipe, described
Second switch, the 4th switching tube and the 5th switching tube；
The light emitting phase: using first scanning signal, second scanning signal, the first control signal and
The second control signal is connected described in the driving switch pipe, the 4th switching tube and the 5th switching tube and shutdown
First switch tube, the second switch and the third switching tube.
In the pixel compensation circuit that this announcement embodiment provides, the driving switch pipe and the first switch tube extremely
In the case that 5th switching tube is P-type TFT, when second scanning signal and the first control signal
Output is low level, and first scanning signal and the second control signal export when being high level, the pixel
Compensation circuit is in the reseting stage；When first scanning signal output is low level, and second scanning signal, institute
It states first control signal and the second control signal exports when being high level, the pixel compensation circuit is in the compensation
Stage；When the first control signal and second control signal output are low level, and first scanning signal with
When the second scanning signal output is high level, the pixel compensation circuit is in the light emitting phase.
In the pixel compensation circuit that this announcement embodiment provides, the driving switch pipe and the first switch tube extremely
In the case that 5th switching tube is P-type TFT, when second scanning signal and the first control signal
Output is high level, and first scanning signal and the second control signal export when being low level, the pixel
Compensation circuit is in the reseting stage；When first scanning signal output is high level, and second scanning signal, the
When one control signal and second control signal output are low level, the pixel compensation circuit is in the compensation rank
Section；When the first control signal and second control signal output are high level, and first scanning signal and institute
The output of the second scanning signal is stated when being low level, the pixel compensation circuit is in the light emitting phase.
In the pixel compensation circuit that this announcement embodiment provides, the voltage of first power supply signal is greater than described second
The voltage of power supply signal.
This announcement embodiment provide pixel compensation circuit in, first power supply signal be high level, described second
Power supply signal is low level.
In the pixel compensation circuit that this announcement embodiment provides, the light-emitting component is Organic Light Emitting Diode.
This announcement embodiment provides a kind of display device, includes above-mentioned pixel compensation circuit.
The pixel compensation circuit and display device for having the beneficial effect that this announcement offer of this announcement, are mended by the pixel
Circuit is repaid, the drift for the threshold voltage vt h for reducing or eliminating driving thin film transistor (TFT) both may be implemented to OLED driving current
The influence that the pressure drop for influencing, while can also reducing or eliminating supply voltage VDD is drifted about to OLED driving current, can be achieved at the same time
Compensation to the pressure drop drift of the threshold voltage vt h and supply voltage VDD of driving thin film transistor (TFT), is conducive to improve light-emitting component
Light emission luminance uniformity.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of embodiment or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only some of announcement
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the OLED pixel driving circuit of the prior art；
Fig. 2 is a kind of structural schematic diagram for pixel compensation circuit that this announcement embodiment provides；
Fig. 3 is a kind of time diagram for pixel compensation circuit that this announcement embodiment provides；
Fig. 4 is a kind of reseting stage structural schematic diagram for pixel compensation circuit that this announcement embodiment provides；
Fig. 5 is a kind of compensated stage structural schematic diagram for pixel compensation circuit that this announcement embodiment provides；
Fig. 6 is a kind of light emitting phase structural schematic diagram for pixel compensation circuit that this announcement embodiment provides.
Specific embodiment
The explanation of following embodiment is referred to the additional illustration, the particular implementation that can be used to implement to illustrate this announcement
Example.The direction term that this announcement is previously mentioned, such as [on], [under], [preceding], [rear], [left side], [right side], [interior], [outer], [side]
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand this announcement, rather than to
Limit this announcement.The similar unit of structure is with being given the same reference numerals in the figure.
This announcement embodiment be directed to the prior art pixel compensation circuit and display device, OLED driving current vulnerable to
It drives the influence of the drift of thin film transistor (TFT) threshold voltage vt h and the pressure drop drift of supply voltage VDD and changes, cause
The technical issues of OLED shows that image is uneven, influences image quality.The present embodiment is able to solve the defect.
Embodiment one
As shown in Fig. 2, the pixel compensation circuit that this announcement embodiment provides, including driving switch pipe T, first switch tube
T1, second switch T2, third switch transistor T 3, the 4th switch transistor T 4, the 5th switch transistor T 5, storage capacitance Cst and the member that shines
Part, physical circuit connection relationship are as follows:
Driving switch pipe T, the driving switch pipe T include first end, second end and control terminal, the driving switch pipe T
First end connect the first power supply signal VDD；
First switch tube T1, the first switch tube T1 include first end, second end and control terminal, the first switch tube
The first end of T1 is connect with the control terminal of the driving switch pipe T, the second end of the first switch tube T1
It is connect with the second end of the driving switch pipe T, control terminal connection the first scanning letter of the first switch tube T1
Number Scan (n)；
Second switch T2, the second switch T2 include first end, second end and control terminal, the second switch
The first end of T2 connects resetting voltage Vi, and the control terminal of the second switch T2 connects the second scanning signal Scan
(n-1), wherein the current potential of the resetting voltage Vi is lower, the driving switch pipe T and the second switch T2 intersect at section
Point B；
Third switch transistor T 3, the third switch transistor T 3 include first end, second end and control terminal, the third switching tube
The first end of T3 connects data-signal Vdata, the control terminal connection of the third switch transistor T 3 first scanning
Signal Scan (n)；
4th switch transistor T 4, the 4th switch transistor T 4 include first end, second end and control terminal, the 4th switching tube
The first end of T4 is grounded, and the second end of the 4th switch transistor T 4 connects the second end of the third switch transistor T 3,
The control terminal of 4th switch transistor T 4 connects first control signal EM1, wherein the 4th switch transistor T 4 and described the
Three switch transistor Ts 3 intersect at node A；
5th switch transistor T 5, the 5th switch transistor T 5 include first end, second end and control terminal, the 5th switching tube
The first end of T5 connect the driving switch pipe T the second end and the first switch tube T1 described second
The control terminal at end, the 5th switch transistor T 5 connects second control signal EM2；
Storage capacitance Cst, the storage capacitance Cst have first end and a second end, and described the of the storage capacitance Cst
One end connects the second end of the third switch transistor T 3 and the second end of the 4th switch transistor T 4, the storage
The second end of capacitor Cst connect the control terminal of the driving switch pipe T, the first switch tube T1 described first
The second end of end and the second switch T2, specifically, the first end of the storage capacitance Cst are described
Node A, the second end of the storage capacitance Cst are the node B；
Light-emitting component, the light-emitting component can for Organic Light Emitting Diode (Organic Light-Emitting Diode,
OLED), the light-emitting component has anode tap and cathode terminal, the anode tap connection of the light-emitting component the 5th switch
The cathode terminal of the second end of pipe T5, the light-emitting component connects second source signal VSS.
Wherein, the voltage that the first power supply signal VDD is provided is greater than the voltage that the second source signal VSS is provided,
Specifically, the first power supply signal VDD is high level signal, and the second source signal VSS is low level signal.
In this announcement embodiment, the driving switch pipe T, the first switch tube T1, the second switch T2, institute
Stating third switch transistor T 3, the 4th switch transistor T 4 and the 5th switch transistor T 5 is thin film transistor (TFT), wherein described thin
The first end of film transistor is source electrode (Source, S), second end be drain (Drain, D) and control terminal be grid (Gate,
G)。
In this announcement embodiment, the driving switch pipe T, the first switch tube T1, the second switch T2, institute
Stating third switch transistor T 3, the 4th switch transistor T 4 and the 5th switch transistor T 5 is P-type TFT, the present embodiment
It is illustrated by taking P-type TFT as an example.It should be understood that the driving switch pipe T, the first switch tube T1, described
Second switch T2, the third switch transistor T 3, the 4th switch transistor T 4 and the 5th switch transistor T 5 can also be N-type
Thin film transistor (TFT), OLED current flow direction and institute when selecting N-type TFT, in the corresponding pixel compensation circuit
State the first scanning signal Scan (n), the second scanning signal Scan (n-1), the first control signal EM1 and described first
The low and high level of control signal EM2 uses the thin film transistor (TFT) of different conduction-types opening as the pixel compensation circuit therewith
It closes the difference of element and changes, this is no longer going to repeat them.
It is illustrated in figure 3 the time diagram of the pixel compensation circuit of this announcement embodiment offer, by this present embodiment
P-type TFT is selected, when the grid signal of switching tube input is low level, corresponding switching tube conducting；When switching tube is defeated
When the grid signal entered is high level, corresponding switching tube shutdown.The driving process of the pixel compensation circuit include reseting stage,
Compensated stage and light emitting phase, in which:
Reset (Reset) stage:
In the t1 period, the pixel compensation circuit is in reseting stage, at this time the second scanning signal Scan (n-1)
It is low level with first control signal EM1 output, and the first scanning signal Scan (n) and second control are believed
When number EM2 output is high level, i.e., the described second scanning signal Scan (n-1) and the first control signal EM1 are opened, institute
The first scanning signal Scan (n) and the second control signal EM2 is stated to close.
It is illustrated in figure 4 the equivalent circuit structure figure of reseting stage.The second switch T2 and the 4th switching tube
T4 is in the conductive state, the driving switch pipe T, the first switch tube T1, the third switch transistor T 3 and the described 5th
Switch transistor T 5 is in an off state, at this time the first end of the storage capacitance Cst, the i.e. voltage amplitude of node A to 0V, institute
State the second end of storage capacitance Cst, the i.e. voltage amplitude of node B to the resetting voltage Vi.Specifically, the driving is opened
The voltage for closing the first end of pipe T is the data-signal Vdata voltage, then the control terminal of the driving switch pipe T
Voltage difference between the first end is Vgs=Vi-Vdata, need to guarantee Vgs=Vi-Vdata < Vth, i.e. Vi < Vdata+
When Vth, the driving switch pipe T is in an off state, wherein Vth is the threshold voltage of the driving switch pipe T.
Compensation (Compensate) stage:
In the t2 period, the first scanning signal Scan (n) output at this time is low level, and second scanning signal
When Scan (n-1), the first control signal EM1 and second control signal EM2 output are high level, i.e., described first
Scanning signal Scan (n) is opened, the second scanning signal Scan (n-1), the first control signal EM1 and second control
Signal EM2 processed is closed.
It is illustrated in figure 5 the equivalent circuit structure figure of compensated stage.The driving switch pipe T, the first switch tube T1
And the third switch transistor T 3 is in the conductive state, the driving switch pipe T, the second switch T2, the described 4th open
It closes pipe T4 and the 5th switch transistor T 5 is in an off state, at this time the first end of the storage capacitance Cst, i.e. node
The voltage that the data-signal Vdata is provided is written in the voltage of A, due to the driving switch pipe T the control terminal with it is described
Second end is shorted by the first switch tube T1, therefore the driving switch pipe T and first switch tube T1 forms one
Diode connects (Diode connect) structure 10, and the first power supply signal VDD is by described the first of the driving switch pipe
End write-in, by the diode connection structure 10, the control terminal (grid) of the driving switch pipe T is charged to
The control terminal (grid) current potential of the driving switch pipe T is VDD+Vth, i.e., the current potential of the described node B is VDD+Vth.
It is described to shine (Emission) stage:
In the t3 period, the first control signal EM1 and second control signal EM2 output at this time is low electricity
It puts down, and the first scanning signal Scan (n) and the second scanning signal Scan (n-1) export when being high level, i.e. institute
It states the first control signal EM1 and second control signal EM2 to open, the first scanning signal Scan (n) and described second
Scanning signal Scan (n-1) is closed.
It is illustrated in figure 6 the equivalent circuit structure figure of light emitting phase.The driving switch pipe T, the 4th switch transistor T 4
And the 5th switch transistor T 5 is in the conductive state, the first switch tube T1, the second switch T2 and described
Three switch transistor Ts 3 are in an off state, at this time the first end of the storage capacitance Cst, i.e., the voltage of node A is 0V, due to
The coupling of the storage capacitance Cst, the control terminal (grid) current potential of the driving switch pipe T are VDD+Vth, i.e. institute
The current potential for stating node B is VDD+Vth-Vdata, therefore, the glow current I of OLEDOLEDFor IOLED=k [(VDD+Vth-Vdata-
VDD)-Vth]2=kVdata2, wherein k is coefficient.
From the above equation, we can see that the glow current I of OLEDOLEDIt is only related with the data-signal Data, with the driving switch
The threshold voltage vt h of pipe T is unrelated with the first supply voltage VDD, to solve due to the driving thin film transistor (TFT) T's
The problem of light emission luminance unevenness caused by the drift of threshold voltage vt h and the pressure drop of the first supply voltage VDD drift.
Embodiment two
This announcement embodiment also provides a kind of embodiment of display device.In the present embodiment, the display device can be
AMOLED display device, AMOLED display device include pixel compensation circuit described in above-described embodiment.
The display device that this announcement embodiment provides can using this announcement pixel compensation circuit provided by the above embodiment
It changes to avoid light emission luminance of the light-emitting component in each pixel in a frame picture, and, it avoids in each pixel
It drives in each pixel caused by the drift of the threshold voltage vt h of thin film transistor (TFT) and the pressure drop drift of supply voltage VDD and shines
Element light emission luminance it is uneven, to improve display effect and show uniformity.
It has the beneficial effect that the pixel compensation circuit and display device that this announcement embodiment provides, passes through the pixel compensation
Shadow of the drift to OLED driving current for reducing or eliminating the threshold voltage vt h of driving thin film transistor (TFT) both may be implemented in circuit
The pressure drop for ringing, while can also reducing or eliminating supply voltage VDD is drifted about influence to OLED driving current, can be achieved at the same time pair
The compensation for driving the pressure drop drift of the threshold voltage vt h and supply voltage VDD of thin film transistor (TFT), is conducive to improve light-emitting component
The uniformity of light emission luminance.
Although above preferred embodiment is not to limit in conclusion this announcement is disclosed above with preferred embodiment
This announcement is made, those skilled in the art can make various changes and profit in the spirit and scope for not departing from this announcement
Decorations, therefore the protection scope of this announcement subjects to the scope of the claims.
Claims (10)
1. a kind of pixel compensation circuit characterized by comprising
Driving switch pipe, the driving switch pipe include first end, second end and control terminal, and described the of the driving switch pipe
One end connects the first power supply signal；
First switch tube, the first switch tube include first end, second end and control terminal, and described the of the first switch tube
One end is connect with the control terminal of the driving switch pipe, the second end and the driving switch of the first switch tube
The second end of pipe connects, and the control terminal of the first switch tube connects the first scanning signal；
Second switch, the second switch include first end, second end and control terminal, and described the of the second switch
One end connects resetting voltage, and the control terminal of the second switch connects the second scanning signal；
Third switching tube, the third switching tube include first end, second end and control terminal, and described the of the third switching tube
One end connects data-signal, and the control terminal of the third switching tube connects first scanning signal；
4th switching tube, the 4th switching tube include first end, second end and control terminal, and described the of the 4th switching tube
One end ground connection, the second end of the 4th switching tube connect the second end of the third switching tube, and the described 4th opens
The control terminal for closing pipe connects first control signal；
5th switching tube, the 5th switching tube include first end, second end and control terminal, and described the of the 5th switching tube
One end connects the second end of the driving switch pipe and the second end of the first switch tube, the 5th switch
The control terminal of pipe connects second control signal；
Storage capacitance, the storage capacitance have first end and second end, the storage capacitance the first end connection described in
The second end of the second end of third switching tube and the 4th switching tube, the second end of the storage capacitance
Connect the control terminal of the driving switch pipe, the first end of the first switch tube and the second switch
The second end；And
Light-emitting component, the light-emitting component have anode tap and cathode terminal, the light-emitting component the anode tap connection described in
The cathode terminal of the second end of 5th switching tube, the light-emitting component connects second source signal.
2. pixel compensation circuit according to claim 1, which is characterized in that the driving switch pipe, the first switch
Pipe, the second switch, the third switching tube, the 4th switching tube and the 5th switching tube are film crystal
Pipe, wherein the first end of the thin film transistor (TFT) is source electrode, second end is drain electrode and control terminal is grid.
3. pixel compensation circuit according to claim 2, which is characterized in that the driving switch pipe, the first switch
Pipe, the second switch, the third switching tube, the 4th switching tube and the 5th switching tube are p-type film
Transistor is N-type TFT.
4. pixel compensation circuit according to claim 1, which is characterized in that the driving process packet of the pixel compensation circuit
Include reseting stage, compensated stage and light emitting phase, in which:
The reseting stage: first scanning signal, second scanning signal, the first control signal and described are utilized
Second control signal is connected the second switch and the 4th switching tube and turns off the driving switch pipe, described first opens
Guan Guan, the third switching tube and the 5th switching tube；
The compensated stage: first scanning signal, second scanning signal, the first control signal and described are utilized
Second control signal is connected the first switch tube and the third switching tube and turns off the driving switch pipe, described second
Switching tube, the 4th switching tube and the 5th switching tube；
The light emitting phase: first scanning signal, second scanning signal, the first control signal and described are utilized
Second control signal is connected the driving switch pipe, the 4th switching tube and the 5th switching tube and turns off described first
Switching tube, the second switch and the third switching tube.
5. pixel compensation circuit according to claim 4, which is characterized in that opened in the driving switch pipe with described first
In the case that 5th switching tube described in Guan Guanzhi is P-type TFT, when second scanning signal and first control
Signal output processed is low level, and first scanning signal and the second control signal export when being high level, institute
It states pixel compensation circuit and is in the reseting stage；It is low level when first scanning signal exports, and described second scans
When signal, the first control signal and second control signal output are high level, the pixel compensation circuit is in
The compensated stage；It is low level when the first control signal and the second control signal export, and described first sweeps
It retouches signal and second scanning signal exports when being high level, the pixel compensation circuit is in the light emitting phase.
6. pixel compensation circuit according to claim 4, which is characterized in that opened in the driving switch pipe with described first
In the case that 5th switching tube described in Guan Guanzhi is P-type TFT, when second scanning signal and first control
Signal output processed is high level, and first scanning signal and the second control signal export when being low level, institute
It states pixel compensation circuit and is in the reseting stage；It is high level when first scanning signal exports, and described second scans
When signal, first control signal and second control signal output are low level, the pixel compensation circuit is in described
Compensated stage；It is high level when the first control signal and the second control signal export, and first scanning is believed
Number with second scanning signal output be low level when, the pixel compensation circuit is in the light emitting phase.
7. pixel compensation circuit according to claim 1, which is characterized in that the voltage of first power supply signal is greater than institute
State the voltage of second source signal.
8. pixel compensation circuit according to claim 7, which is characterized in that first power supply signal is high level, institute
Stating second source signal is low level.
9. pixel compensation circuit according to claim 1, which is characterized in that the light-emitting component is organic light-emitting diodes
Pipe.
10. a kind of display device, which is characterized in that include the described in any item pixel compensation circuits of claim 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244259.3A CN109872682A (en) | 2019-03-28 | 2019-03-28 | Pixel compensation circuit and display device |
| PCT/CN2019/086321 WO2020191872A1 (en) | 2019-03-28 | 2019-05-10 | Pixel compensation circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244259.3A CN109872682A (en) | 2019-03-28 | 2019-03-28 | Pixel compensation circuit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109872682A true CN109872682A (en) | 2019-06-11 |
Family
ID=66921512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910244259.3A Pending CN109872682A (en) | 2019-03-28 | 2019-03-28 | Pixel compensation circuit and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109872682A (en) |
| WO (1) | WO2020191872A1 (en) |
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Application publication date: 20190611 |