CN109523951A - A kind of pixel circuit and display device - Google Patents
A kind of pixel circuit and display device Download PDFInfo
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- CN109523951A CN109523951A CN201811643514.3A CN201811643514A CN109523951A CN 109523951 A CN109523951 A CN 109523951A CN 201811643514 A CN201811643514 A CN 201811643514A CN 109523951 A CN109523951 A CN 109523951A
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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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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a kind of pixel circuit and display devices.The pixel circuit includes data voltage writing module, drive module, light emitting module, light emitting control module, compensating module and memory module, and memory module includes concatenated at least two capacitor.Memory module voltage for storing data, if memory module is used to shine with the first driving frequency driving light emitting module, the capacitor of memory module is set to first capacitor value；If being shone with the second driving frequency driving light emitting module, the capacitor of memory module is set to the second capacitance；Wherein, the first driving frequency is greater than the second driving frequency, and first capacitor value is less than the second capacitance.So as to which so that pixel circuit responds different driving frequencies, different driving frequencies can be compatible with by realizing pixel circuit, improve the display effect of display panel.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of pixel circuit and display devices.
Background technique
Current display panel needs to meet for different usage scenarios using different driving frequencies the difference of user
Demand.Such as display panel needs low frequency driving to reduce the power consumption of display panel in reading model, display panel in viewing and
High-frequency drive is needed to improve the viewing experience of user when game isotype.But the pixel-driving circuit of present display panel is not
The compatible different driving frequency of energy, therefore it is unable to satisfy the different demands of user.
Summary of the invention
The present invention provides a kind of pixel circuit and display device, to realize the compatible different pixel driver of pixel-driving circuit
Frequency.
In a first aspect, the embodiment of the invention provides a kind of pixel circuit, including data voltage writing module, driving mould
Block, light emitting module, light emitting control module and compensating module；Further include memory module, the memory module include it is concatenated at least
Two capacitors；
The data voltage writing module is used to that data voltage to be written to the drive module；
The compensating module is for compensating the data voltage that the drive module is written；
The memory module is for storing the data voltage, if the memory module is used for the driving of the first driving frequency
The light emitting module shines, and the capacitor of the memory module is set to first capacitor value；If driving institute with the second driving frequency
It states light emitting module to shine, the capacitor of the memory module is set to the second capacitance；Wherein, first driving frequency is greater than
Second driving frequency, the first capacitor value are less than second capacitance；
The drive module is used for according to the data voltage output drive signal；
The light emitting control module is exported for controlling the driving signal to the light emitting module, controls the luminous mould
Block shines.
Specifically, the memory module further includes first end, second end and at least one the first transistor；At least two institutes
It states capacitor to be connected between the first end and second end of the memory module, the first end and second end difference of the memory module
It is electrically connected with the first end of the control terminal of the drive module and the drive module；The commonly connected pole of capacitor described in every two
It is electrically connected with the first pole of a first transistor, the second pole of the first transistor and the second end of the memory module
Electrical connection, the control terminal electrical connections different from the pixel circuit respectively of the grid of each the first transistor.
Optionally, the memory module further includes second transistor；
First pole of the second transistor is electrically connected with the first end of the memory module, and the of the second transistor
Two poles are electrically connected with the second pole of first capacitor, and the of the first pole of capacitor described in the latter and the previous capacitor
The electrical connection of two poles, the second pole of the last one capacitor is electrically connected with the second end of the memory module；
The grid of the grid of each the first transistor and the second transistor difference with the pixel circuit respectively
Control terminal electrical connection.
Optionally, the memory module further includes second transistor；
First pole of first capacitor is electrically connected with the first end of the memory module, and of capacitor described in the latter
One pole is electrically connected with the second pole of the previous capacitor, the second pole and the second transistor of the last one capacitor
The electrical connection of first pole, the second pole of the second transistor is electrically connected with the second end of the memory module；
The grid of the grid of each the first transistor and the second transistor difference with the pixel circuit respectively
Control terminal electrical connection.
Optionally, at least one transistor turns in each the first transistor and the second transistor, other are brilliant
The shutdown of body pipe.
Optionally, the memory module includes two capacitors and a first transistor, alternatively, the storage
Module includes three capacitors and two the first transistors.
Optionally, the Data write. module includes third transistor, and the drive module includes driving transistor, described
Light emitting module is light emitting diode；The light emitting control module includes the 4th transistor；The compensating module includes the 5th crystal
Pipe；
First scanning of the grid of the grid of the third transistor and the 5th transistor and the pixel circuit is believed
The electrical connection of number input terminal, the first pole of the third transistor are electrically connected with the data signal input of the pixel circuit, institute
The second pole for stating third transistor is electrically connected with the first pole of the driving transistor；First pole of the driving transistor and institute
State the second pole electrical connection of the 4th transistor, the second pole of the driving transistor and the second pole and the institute of the 5th transistor
State the anode electrical connection of light emitting diode；The second source input terminal electricity of the cathode of the light emitting diode and the pixel circuit
Connection；The second of first pole of the 4th transistor and the first power input of the pixel circuit and the memory module
End electrical connection, the grid of the 4th transistor are electrically connected with the first light emitting control end；The grid of the driving transistor and institute
State the first pole of the 5th transistor and the first end electrical connection of the memory module.
Optionally, the Data write. module includes third transistor, and the drive module includes driving transistor, described
Light emitting module is light emitting diode；The light emitting control module includes the 4th transistor；The compensating module includes the 4th capacitor；
The grid of the third transistor is electrically connected with the first scanning signal input terminal of the pixel circuit, the third
First pole of transistor is electrically connected with the data signal input of the pixel circuit, the second pole of the third transistor and institute
State the grid of driving transistor and the first end electrical connection of the memory module；The first pole and described the of the driving transistor
First pole of four capacitors and the first power input electrical connection of the pixel circuit, the second pole of the driving transistor and institute
State the first pole electrical connection of the second pole of the 4th capacitor, the second end of the memory module and the 4th transistor, described the
Second pole of four transistors is electrically connected with the anode of the light emitting diode；The cathode of the light emitting diode and pixel electricity
The second source input terminal on road is electrically connected；The grid of 4th transistor and the first light emitting control end electricity of the pixel circuit
Connection.Optionally, pixel circuit further includes reseting module；The second of the control terminal of the reseting module and the pixel circuit
The electrical connection of scanning signal input terminal, the first end of the reseting module and the reset signal input terminal of the pixel circuit are electrically connected
It connects, the second end of the reseting module is electrically connected with the anode of the light emitting diode.
Second aspect, the embodiment of the invention also provides a kind of display devices, provide including any embodiment of that present invention
Pixel circuit.
Technical solution of the present invention, it is adjustable by the storage capacitance value that memory module is arranged, if meeting it with relatively high
Driving frequency driving light emitting module shine when, memory module first capacitor value it is smaller, so as to realize memory module
Quickly to drive module charge and discharge, guarantee that drive module charge and discharge are abundant, to ensure that data voltage writing module to drive
The correctness of memory module storing data voltage, the grayscale that ensure that pixel circuit is shown are bright when data voltage is written in dynamic model block
Degree, avoids the problem that poor contrast occurs in display panel.The mould that shines is driven with relatively low driving frequency if can satisfy simultaneously
When block shines, the second capacitance of memory module is bigger, and memory module can store up data voltage in long time memory,
So as to keep the current potential of drive module for a long time, avoid display panel during display because the current potential of drive module is kept
The problem of the time short homogeneity difference for display flashing or display panel occur.Therefore the storage capacitance value of pixel circuit can basis
Driving frequency is different and changes, and keeps the charge and discharge time of storage capacitance different with being kept for the time of drive module current potential, so as to
So that pixel circuit responds different driving frequencies, different driving frequencies can be compatible with by realizing pixel circuit, be improved aobvious
Show the display effect of panel.
Detailed description of the invention
Fig. 1 is a kind of electrical block diagram for pixel circuit that the prior art provides.
Fig. 2 is a kind of electrical block diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 3 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 4 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 5 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 6 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 7 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 8 is a kind of corresponding timing diagram of pixel circuit of Fig. 7；
Fig. 9 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Figure 10 is a kind of corresponding timing diagram of pixel circuit of Fig. 9；
Figure 11 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention；
Figure 12 is a kind of corresponding timing diagram of pixel circuit of Figure 11；
Figure 13 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
In the prior art, pixel circuit realizes that pixel circuit drives organic light emission two using two transistors and storage capacitance
Pole pipe (Organic Light Emitting Diode, OLED) shines.Fig. 1 is a kind of pixel circuit that the prior art provides
Electrical block diagram.As shown in Figure 1, pixel circuit includes switching transistor T0, driving transistor N0 and storage capacitance Cs.It opens
The grid connection scan line of transistor T0 is closed to receive scanning signal Scan1, source electrode is connected to data line to receive data-signal
Vdata, drain electrode are connected to the grid of driving transistor N0.The source electrode of driving transistor N0 is connected to first voltage end to receive the
One voltage Vdd (high voltage), drain electrode are connected to the positive terminal of OLED；One end of storage capacitance Cs is connected to switching transistor T0's
The grid of drain electrode and driving transistor N0, the other end are connected to source electrode and the first voltage end of driving transistor N0；OLED
Negative pole end be connected to second voltage end to receive second voltage Vss (low-voltage, such as ground voltage).The drive of the pixel circuit
Flowing mode is to control the light and shade (grayscale) of pixel via two transistors and storage capacitance Cs.It is swept when by scan line application
When retouching signal Scan1 to open switching transistor T0, data-signal Vdata that data drive circuit is sent by data line will be through
It is charged, thus data-signal Vdata is stored in storage capacitance Cs, and this is stored to storage capacitance Cs by switching transistor T0
Data-signal Vdata control driving transistor N0 conducting degree, thus control flow through driving transistor to drive OLED to send out
The grayscale that the size of current of light, i.e. this electric current determine the pixel light emission.
In above process, the capacitance of storage capacitance Cs is fixed, therefore the rate of storage capacitance Cs charge and discharge is fixed.When
When pixel circuit is with different driving frequency driving, storage capacitance Cs cannot the different driving frequency of complete response simultaneously, cause
Pixel circuit cannot be compatible with the display of different driving frequencies.For example, when pixel circuit is with relatively low driving frequency driving,
The storage capacitance Cs of pixel circuit needs bigger capacitance for the number of long time holding driving transistor gate
It is believed that number Vdata, if storage capacitance Cs capacitance is too small, display panel will appear the problems such as display flashes.When with pixel electricity
When road is with relatively high driving frequency driving, the storage capacitance Cs of pixel circuit needs smaller capacitance for quickly to drive
The gate charges of dynamic transistor.If storage capacitance Cs capacitance is too big, drives the grid potential of transistor to charge insufficient, show
Show the poor contrast of Display panel.
In view of the above-mentioned problems, the embodiment of the present invention proposes a kind of pixel circuit, to realize the compatible different drive of pixel circuit
Dynamic frequency.
Fig. 2 is a kind of electrical block diagram of pixel circuit provided in an embodiment of the present invention.As shown in Fig. 2, the pixel
Circuit includes data voltage writing module 10, drive module 20, light emitting module 50, light emitting control module 40,30 and of compensating module
Memory module 60, memory module 60 include concatenated at least two capacitor.
Data voltage writing module 10 is used to that data voltage to be written to drive module 20.Compensating module 30 is for compensating write-in
The data voltage of drive module 20.The voltage for storing data of memory module 60, if memory module 60 is used for the first driving frequency
Rate drives light emitting module 50 to shine, and the capacitor of memory module 60 is set to first capacitor value；If with the driving of the second driving frequency
Light emitting module 50 shines, and the capacitor of memory module 60 is set to the second capacitance；Wherein, the first driving frequency is greater than second and drives
Dynamic frequency, first capacitor value is less than the second capacitance.Drive module 20 is used for according to data voltage output drive signal.Shine control
Molding block 40 is exported for controlling driving signal to light emitting module 50, is controlled light emitting module 50 and is shone.
Illustratively, as shown in Fig. 2, the control terminal of data voltage writing module 10 and the control terminal of compensating module 30 and the
Scan signal input terminal Scan1 electrical connection, for input the first scanning signal, the first end of data voltage writing module 10 with
Data signal input Vdata electrical connection is used for input data voltage, the second end and driving mould of data voltage writing module 10
The first end of block 20 is electrically connected.The first end of drive module 20 is electrically connected with the second end of light emitting control module 40, drive module
20 second end is electrically connected with the first end of the second end of compensating module 30 and light emitting module 50, the first end of compensating module 30 with
The first end electrical connection of the control terminal and memory module 60 of drive module 20, the control terminal of light emitting control module 40 shine with first
Control terminal E1 electrical connection, for inputting the first LED control signal, the of the first end of light emitting control module 40 and pixel circuit
The electrical connection of the second end of one power input Vdd and memory module 60.The second of the second end of light emitting module 50 and pixel circuit
Power input Vss electrical connection, for inputting second voltage.During pixel circuit driving light emitting module 50 shines,
Data voltage is written to drive module 20 in first stage, data voltage writing module 10, and compensating module 30 compensates write driver mould
The data voltage of block 20.In second stage, light emitting control module 40 controls driving signal and exports to light emitting module 50, and control shines
Module 50 shines.
Before pixel circuit driving light emitting module 50 shines, pixel circuit determines memory module 60 according to driving frequency
Capacitance.When being shone with the light emitting module of the first driving frequency driving pixel circuit, the capacitor of memory module 60 is set to
First capacitor value, voltage is stored when being shone with the light emitting module of the second driving frequency driving pixel circuit for storing data
The capacitor of module 60 is set to the second capacitance, for storing data voltage.When the first driving frequency is greater than the second driving frequency
When rate, need to be arranged first capacitor value less than the second capacitance, if driving light emitting module to meet with relatively high driving frequency
50 it is luminous when, memory module 60 first capacitor value it is smaller, so as to realize memory module 60 quickly to drive module
20 charge and discharge guarantee that 20 charge and discharge of drive module are abundant, to ensure that data voltage writing module 10 is write to drive module 20
The correctness of 60 storing data voltage of memory module, ensure that the gray-scale intensity that pixel circuit is shown, avoids when entering data voltage
There is the problem of poor contrast in display panel.It is shone if can satisfy simultaneously with relatively low driving frequency driving light emitting module 50
When, the second capacitance of memory module 60 is bigger, and memory module 60 can store up data voltage in long time memory, from
And the current potential of drive module 20 can be kept for a long time, avoid display panel during display because the current potential of drive module 20 is protected
Hold the problem of the time short homogeneity difference for display flashing or display panel occur.Therefore the storage capacitance value of pixel circuit can root
Change according to driving frequency difference, make the charge and discharge time of storage capacitance and kept for the time of drive module current potential change
Become, so as to which so that pixel circuit responds different driving frequencies, different driving frequencies can be compatible with by realizing pixel circuit,
Improve the display effect of display panel.
Under normal circumstances, the first power supply of the first power input Vdd input is high level, second source input terminal Vss
The second source of input is low level, such as can be earth signal, is 0V.
The technical solution of the present embodiment, pixel circuit include data voltage writing module, drive module, light emitting module, hair
Photocontrol module, compensating module and memory module, memory module include concatenated at least two capacitor.Memory module is for storing
Data voltage, if memory module is used to shine with the first driving frequency driving light emitting module, the capacitor of memory module is set to
First capacitor value；If being shone with the second driving frequency driving light emitting module, the capacitor of memory module is set to the second capacitance；
Wherein, the first driving frequency is greater than the second driving frequency, and first capacitor value is less than the second capacitance.Pass through setting memory module
Storage capacitance value is adjustable, if its satisfaction is made to shine with relatively high driving frequency driving light emitting module, the first of memory module
Capacitance is smaller, so as to realize that memory module quickly to drive module charge and discharge, guarantees that drive module charge and discharge are filled
Point, to ensure that memory module storing data voltage is just when data voltage is written to drive module in data voltage writing module
True property ensure that the gray-scale intensity that pixel circuit is shown, avoid the problem that poor contrast occurs in display panel.It can satisfy simultaneously
If shone with relatively low driving frequency driving light emitting module, the second capacitance of memory module is bigger, and memory module can
To avoid display panel in long time memory storage data voltage so as to keep the current potential of drive module for a long time
The problem of the current potential retention time short homogeneity difference for display flashing or display panel occur during display because of drive module.
Therefore the storage capacitance value of pixel circuit can change according to driving frequency difference, make charge and discharge time and the guarantor of storage capacitance
The time for holding drive module current potential changes, so as to realize picture so that pixel circuit responds different driving frequencies
Plain circuit can be compatible with different driving frequencies, improve the display effect of display panel.
Based on the above technical solution, memory module further includes first end, second end and at least one first crystal
Pipe.At least two capacitors are connected between the first end and second end of memory module, the first end and second end point of memory module
Be not electrically connected with the first power input of the control terminal of drive module and pixel circuit, the commonly connected pole of every two capacitor with
First pole of one the first transistor is electrically connected, and the second pole of the first transistor is electrically connected with the second end of memory module, and each first
The control terminal electrical connections different from pixel circuit respectively of the grid of transistor.
Specifically, the first end and second end of memory module respectively with the control terminal of drive module and pixel circuit first
Power input electrical connection includes two kinds of situations.When the first situation, the first end of memory module and the control terminal of drive module
Electrical connection, the second end of memory module are electrically connected with the first power input of pixel circuit.When second situation, memory module
Second end be electrically connected with the control terminal of drive module, the first power input electricity of the first end of memory module and pixel circuit
Connection.Two kinds of situations may be implemented memory module and be serially connected in the control terminal of drive module and the first power input of pixel circuit
Between end.Alternatively, one of two kinds of situations of selection situation only exchanges the first end and second end of memory module, it equally can be real
Existing memory module is serially connected in the different situations between the control terminal of drive module and the first power input of pixel circuit.
In memory module, the first transistor can be used as the switch whether a capacitor in memory module is short-circuited.
For example, the second pole of the first transistor is electrically connected with the first end of memory module or second end, in the first pole and memory module
The commonly connected pole of multiple capacitors is electrically connected, and when the first transistor conducting, the first transistor is equivalent to short circuit, at this time with first
The capacitor of coupled in parallel is short-circuited, therefore capacitor corresponding with the first transistor cannot be with memory module others capacitor string
Connection, the concatenated capacitor of memory module tail off, and the capacitance of memory module becomes larger.When the first transistor cut-off, first crystal
Pipe is equivalent to open circuit, connects at this time with the capacitor of the first transistor parallel connection with memory module others capacitor, the string of memory module
The capacitor of connection becomes more, and the capacitance of memory module becomes smaller.Therefore it can be adjusted by controlling the on or off of the first transistor
The capacitance of memory module.
In addition, the control terminal electrical connections different from pixel circuit respectively of the grid of each the first transistor, pass through pixel circuit
Different control terminal input control signals, can control the on or off of the first transistor.For example, when the first transistor is P
When transistor npn npn, the first transistor is connected when the control terminal input low level signal of pixel circuit, when input terminal high level signal
The first transistor cut-off.Alternatively, when the first transistor is N-type transistor, the control terminal input low level signal of pixel circuit
When the first transistor end, the first transistor is connected when input terminal high level signal.
Under normal circumstances, reference voltage end can be the first power input of pixel circuit, for inputting the first power supply.
Illustratively, Fig. 3 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.Such as Fig. 3
Shown, memory module 60 is schematically illustrated including two storage capacitances, respectively first capacitor C1 and the second capacitor C2, with
An and the first transistor T1.First end of the first pole of first capacitor C1 as memory module 60, the second of first capacitor C1
Pole is electrically connected with the first pole of the second capacitor C2, and is formed points of common connection and be electrically connected with the first pole of the first transistor T1, the
Second end of the second pole of two capacitor C2 as memory module 60, the second pole of the first transistor T1 and the second of memory module 60
End electrical connection, the grid of the first transistor T1 are electrically connected with a control terminal of pixel circuit.When with the driving of the first driving frequency
When the light emitting module 50 of pixel circuit shines, control the first transistor T1 cut-off, the first capacitor that memory module 60 provides at this time
Value is first capacitor C1 and the second concatenated capacitance of capacitor C2, therefore capacitor when first capacitor value is with respect to only one capacitor
It is worth small, the charge and discharge time, 20 charge and discharge of drive module were abundant than very fast, can make the storage when the first driving frequency drives
60 charge and discharge of module reach required voltage in a short time, ensure that data voltage writing module 10 is written to drive module 20
The correctness of 60 storing data voltage of memory module, ensure that the gray-scale intensity that pixel circuit is shown when data voltage, avoid showing
Show that the problem of poor contrast occurs in panel.When being shone with the light emitting module 50 of the second driving frequency driving pixel circuit, second
Driving frequency controls the first transistor T1 conducting, the second capacitance that memory module 60 provides at this time less than the first driving frequency
For the capacitance of first capacitor C1, big relative to first capacitor C1 and the second concatenated capacitance of capacitor C2, memory module 60 can
To avoid display surface in long time memory storage data voltage so as to keep the current potential of drive module 20 for a long time
Current potential retention time of plate during display because of the drive module 20 short homogeneity difference for display flashing or display panel occur
Problem.Therefore the storage capacitance value of pixel circuit can change according to driving frequency difference, when making the charge and discharge of storage capacitance
Between and kept for the time of drive module current potential change, it is real so as to so that pixel circuit responds different driving frequencies
Different driving frequencies can be compatible with by having showed pixel circuit, improve the display effect of display panel.
It should be noted that Fig. 3 is only a kind of example, memory module 60 can be made to realize the adjusting of two kinds of capacitances.
Memory module 60 can also include multiple capacitors and multiple the first transistor T1.Fig. 4 is another kind provided in an embodiment of the present invention
The electrical block diagram of pixel circuit.As shown in figure 4, memory module 60 may include three capacitors, respectively first capacitor
C1, the second capacitor C2 and third capacitor C3 and two the first transistors T11 and T12, connection relationship are similar with Fig. 3.It can make
Memory module 60 realizes the adjusting of three kinds of capacitances.Specifically process is same as described above, and details are not described herein again.
Based on the above technical solution, Fig. 5 is the circuit knot of another pixel circuit provided in an embodiment of the present invention
Structure schematic diagram.As shown in figure 5, memory module 60 further includes second transistor T2.
First pole of first capacitor is electrically connected with the first end of memory module 60, the first pole of the latter capacitor with it is previous
Second pole of a capacitor is electrically connected, and the second pole of the last one capacitor is electrically connected with the first pole of second transistor T2, and second is brilliant
The second pole of body pipe T2 is electrically connected with the second end of memory module 60, the grid of each the first transistor T1 and second transistor T2's
Grid control terminal electrical connections different from pixel circuit respectively.
Specifically, as shown in figure 5, when memory module 60 includes two capacitors, the electricity of respectively first capacitor C1 and second
Hold C2, further includes the first transistor T1 and second transistor T2.The first pole of first capacitor C1 is as memory module 60
First end, the second pole of first capacitor C1 is electrically connected with the first pole of the second capacitor C2, and forms points of common connection and first
The first pole of transistor T1 is electrically connected, and the second pole of the second capacitor C2 is electrically connected with the first pole of second transistor T2, and second is brilliant
The second end of the second pole of body pipe T2 and the second pole of the first transistor T1 as memory module 60, the grid of the first transistor T1
With the grid different control terminal electrical connections from pixel circuit respectively of second transistor T2.
When being shone with the light emitting module 50 of the first driving frequency driving pixel circuit, control the first transistor T1 cut-off,
Second transistor T2 conducting, the first capacitor value that memory module 60 provides at this time are that first capacitor C1 and the second capacitor C2 is concatenated
Capacitance, therefore capacitance when first capacitor value is with respect to only one capacitor is small, the charge and discharge time is than very fast.When with second
When the light emitting module 50 of driving frequency driving pixel circuit shines, the second driving frequency is less than the first driving frequency, control first
Transistor T1 conducting, second transistor T2 cut-off, the electricity that the second capacitance that memory module 60 provides at this time is first capacitor C1
Capacitance, big relative to first capacitor C1 and the second concatenated capacitance of capacitor C2, memory module 60 can be in the long time
Store data inside voltage, so as to keep the current potential of drive module 20 for a long time.
In addition, the first transistor T1 and second transistor T2 can respectively correspond different capacitors, as the first transistor T1
Circuit breaker when being turned off with second transistor T2, where memory module 60, it is therefore desirable to guarantee the first transistor T1 and the
At least one transistor turns in two-transistor T2.Moreover, when multiple crystalline substances in the first transistor T1 and second transistor T2
When body pipe is connected, it is equivalent to the capacitor minimum number of memory module 60 when multiple conducting transistors are individually connected in memory module 60
Turn-on effect.For example, in Fig. 5, when the first transistor T1 and second transistor T2 is both turned on, equivalent and the only first crystalline substance
When body pipe T1 is connected, the capacitance of memory module 60 is the capacitance of first capacitor C1.
It should be noted that Fig. 5 is only a kind of example, memory module 60 can be made to realize the adjusting of two kinds of capacitances.
Memory module 60 can also include multiple capacitors, multiple the first transistor T1 and second transistor T2.With continued reference to Fig. 4, storage
Module 60 may include three capacitors, respectively first capacitor C1, the second capacitor C2 and third capacitor C3 and two first crystalline substances
Body pipe T11 and T12 and second transistor T2, connection relationship are similar with Fig. 5.Memory module 60 can be made to realize three kinds of capacitances
It adjusts, therefore pixel circuit can be compatible with three kinds of driving frequencies.In three kinds of driving frequencies, it is set as the first driving frequency and is greater than the
Two driving frequencies, the second driving frequency are greater than third driving frequency.When with the luminous mould of the first driving frequency driving pixel circuit
When block 50 shines, two the first transistor T11 and T12 cut-offs are controlled, second transistor T2 conducting, memory module 60 provides at this time
First capacitor value be first capacitor C1, the second capacitor C2 and the concatenated capacitance of third capacitor C3, therefore first capacitor value is most
Small, the charge and discharge time is most fast.When shining with the light emitting module 50 of the second driving frequency driving pixel circuit, first is controlled
The first transistor T11 and second transistor T2 cut-off, second the first transistor T12 conducting, memory module 60 provides at this time
Second capacitance is first capacitor C1 and the second concatenated capacitance of capacitor C2, therefore the second capacitance is greater than first capacitor value,
Its charge and discharge time is greater than first capacitor and is worth the corresponding charge and discharge time, and the current potential retention time is worth corresponding also greater than first capacitor
The charge and discharge time.When shining with the light emitting module 50 of third driving frequency driving pixel circuit, second first crystal is controlled
Pipe T12 and second transistor T2 cut-off, first second transistor T11 conducting, the third capacitor that memory module 60 provides at this time
Value is the capacitance of first capacitor C1, charge and discharge time longest bigger relative to the second capacitance, storage capacitance holding electricity
Position time longest.
It should be noted that pixel circuit shown in fig. 5 is the control of the first end and drive module 20 of memory module 60
End electrical connection, the second end of memory module 60 are electrically connected with the first end of drive module.
Fig. 6 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.As shown in fig. 6, storage
Connection relationship between first power input Vdd of the control terminal and pixel circuit of module 60 and drive module 20 is constant, adjusts
Change memory module 60 first end and second end realize memory module 60 and drive module 20 control terminal and pixel circuit the
Another connection relationship of one power input Vdd.The first end of the first pole of second transistor T2 and memory module 60 at this time
Electrical connection, the second pole of second transistor T2 are electrically connected with the second pole of first capacitor, and the first pole of the latter capacitor is with before
The second pole electrical connection of one capacitor, the second pole of the last one capacitor are electrically connected with the second end of memory module 60, and each first
The grid control terminal electrical connections different from pixel circuit respectively of the grid and second transistor T2 of transistor T1.
Specifically, the difference of Fig. 6 and Fig. 5 is only that the exchange of the first end and second end of memory module 60, therefore Fig. 6 institute
The pixel circuit shown again may be by the conducting of control two the first transistor T11 and T12 and second transistor T2 and cut
Only change the capacitance of memory module 60, principle is same as described above, and details are not described herein again.
Based on the above technical solution, Fig. 7 is the circuit knot of another pixel circuit provided in an embodiment of the present invention
Structure schematic diagram.As shown in fig. 7, Data write. module 10 includes third transistor T3, drive module 20 includes driving transistor
Tdr, light emitting module 50 are light emitting diode, and light emitting control module 40 includes the 4th transistor T4, and compensating module 30 includes the 5th
Transistor T5.
First scanning signal input terminal of the grid and pixel circuit of the grid of third transistor T3 and the 5th transistor T5
Scan1 electrical connection, the first pole of third transistor T3 are electrically connected with the data signal input Vdata of pixel circuit, and third is brilliant
The second pole of body pipe T3 is electrically connected with the first pole of driving transistor Tdr, drives the first pole and the 4th transistor of transistor Tdr
The second pole of T4 is electrically connected, and drives the second pole and the second pole of the 5th transistor T5 and the sun of light emitting diode of transistor Tdr
Pole electrical connection, the cathode of light emitting diode is electrically connected with the second source input terminal Vss of pixel circuit, and the of the 4th transistor T4
One pole is electrically connected with the second end of the first power input Vdd of pixel circuit and memory module 60, the grid of the 4th transistor T4
Pole is electrically connected with the first light emitting control end E1, drives the grid of transistor Tdr and the first pole of the 5th transistor T5 and storage mould
The first end of block 60 is electrically connected.
Specifically, as shown in fig. 7, memory module 60 is illustrated for including three capacitors.The of memory module 60
One end is the first pole of first capacitor C1, and second end is the second pole of second transistor T2.In addition, two the first transistor T11
With the grid of T12 and second transistor T2 respectively with the first control terminal Ctrl1 of pixel circuit, the second control terminal Ctrl2 and
Third control terminal Ctrl3 electrical connection.
Fig. 8 is a kind of corresponding timing diagram of pixel circuit of Fig. 7.It works now in conjunction with pixel circuit of the Fig. 7 and Fig. 8 to Fig. 7
Principle is illustrated.
In fig. 8, ctrl1 is the timing of the first control signal of the first control terminal Ctrl1 input, and ctrl2 is the second control
The timing of the second control signal of Ctrl2 input in end processed, ctrl3 are that the third of third control terminal Ctrl3 input controls signal
Timing, scan1 are the timing of the first scanning signal of the first scanning signal input terminal Scan1 input, and e1 is the first light emitting control
Hold the timing of the first LED control signal of E1 input.It shines when with the light emitting module 50 of the first driving frequency driving pixel circuit
When, ctrl1 and ctrl2 are low level, and ctrl3 is high level, therefore two the first transistors T11 and T12 end, the second crystal
Pipe T2 conducting, the first capacitor value that memory module 60 provides at this time are that first capacitor C1, the second capacitor C2 and third capacitor C3 go here and there
The capacitance of connection, therefore first capacitor value is minimum, the charge and discharge time is most fast.
T1 in the first stage, scan1 are low level, and e1 is high level, and third transistor T3 and the 5th transistor T5 are connected,
4th transistor T4 cut-off.5th transistor T5 connects driving transistor Tdr in the form of diode.Due to driving transistor
Tdr is in the conductive state in the luminescence process of previous frame, therefore the data voltage of third transistor T3 input passes through driving crystal
Pipe Tdr and the 5th transistor T5 is input to the grid of driving transistor Tdr, until the grid voltage of driving transistor Tdr is number
According to the difference of voltage and the threshold voltage for driving transistor Tdr, driving transistor Tdr cut-off drives the grid of transistor Tdr at this time
Voltage is the difference of data voltage and the threshold voltage of driving transistor Tdr, and stores into the capacitor of memory module 60.Such as it counts
It is vdata according to voltage, the threshold voltage of driving transistor Tdr is vth, then drives the grid voltage Vg of transistor Tdr to be
vdata-vth。
It is high level in second stage t2, scan1, e1 is low level, and third transistor T3 and the 5th transistor T5 end,
4th transistor T4 conducting.4th transistor T4 exports the first power supply to the source electrode for driving transistor Tdr, i.e. driving transistor
The voltage of the source electrode Vs of Tdr is vdd.The voltage difference between the source electrode and grid of transistor Tdr is driven to be greater than driving transistor Tdr
Threshold voltage, therefore drive transistor Tdr conducting.Drive is provided to Organic Light Emitting Diode by driving transistor Tdr at this time
Streaming current drives the electric current I of organic light-emitting diode to be because driving transistor Tdr is P-type transistor Wherein, β is a constant, and Vgs is the voltage driven between the source electrode and grid of transistor Tdr.(Vgs-vth)=
(Vs-Vg-vth)=(vdd- (vdata-vth)-vth)=(vdd-vdata), therefore, driving current I isDriving current I is unrelated with the driving threshold voltage of transistor Tdr, it is achieved that driving crystal
The compensation of the threshold voltage of pipe Tdr, while organic light-emitting diode.
When being shone with the light emitting module 50 of the second driving frequency or third driving frequency driving pixel circuit, the tune of adaptation
The low and high level of whole ctrl1 and ctrl2 and ctrl3 controls leading for two the first transistor T11 and T12 and second transistor T2
Logical and cut-off, other driving processes are same as described above, and details are not described herein again.
Fig. 9 is the electrical block diagram of another pixel circuit provided in an embodiment of the present invention.As shown in figure 9, data
Writing module 10 includes third transistor T3, and drive module 20 includes driving transistor Tdr, and light emitting module 50 is light-emitting diodes
Pipe, light emitting control module 40 include the 4th transistor T4, and compensating module 30 includes the 4th capacitor C4.
The grid of third transistor T3 is electrically connected with the first scanning signal input terminal Scan1 of pixel circuit, third crystal
The first pole of pipe T3 is electrically connected with the data signal input Vdata of pixel circuit, the second pole of third transistor T3 and driving
The grid of transistor Tdr and the first end electrical connection of memory module 60, drive the first pole of transistor Tdr and the 4th capacitor C4's
First power input Vdd of the first pole and pixel circuit electrical connection drives the second pole of transistor Tdr and the 4th capacitor C4's
First pole of the second pole, the second end of memory module 60 and the 4th transistor T4 is electrically connected, the second pole of the 4th transistor T4 with
The anode of light emitting diode is electrically connected, and the cathode of light emitting diode is electrically connected with the second source input terminal Vss of pixel circuit, the
The grid of four transistor T4 is electrically connected with the first light emitting control end E1 of pixel circuit.
Specifically, Figure 10 is a kind of corresponding timing diagram of pixel circuit of Fig. 9.Now in conjunction with Fig. 9 and Figure 10 to the pixel of Fig. 9
Circuit operation principle is illustrated.
In Figure 10, ctrl1 is the timing of the first control signal of the first control terminal Ctrl1 input, and ctrl2 is the second control
The timing of the second control signal of Ctrl2 input in end processed, ctrl3 are that the third of third control terminal Ctrl3 input controls signal
Timing, scan1 are the timing of the first scanning signal of the first scanning signal input terminal Scan1 input, and e1 is the first light emitting control
Hold E1 input the first LED control signal timing, vdata be data signal input Vdata input data voltage when
Sequence.When being shone with the light emitting module 50 of the first driving frequency driving pixel circuit, ctrl1 and ctrl2 are low level, ctrl3
For high level, therefore two the first transistor T11 and T12 cut-offs, second transistor T2 conducting, memory module 60 provides at this time
First capacitor value is first capacitor C1, the second capacitor C2 and the concatenated capacitance of third capacitor C3, therefore first capacitor value is minimum,
Its charge and discharge time is most fast.
It is high level in phase III t3, scan1, e1 is high level, and third transistor T3 is connected, and the 4th transistor T4 is cut
Only.Third transistor T3 input data voltage, data voltage is low level at this time, can be reference voltage Vref, drive crystal
The grid potential Vg of pipe Tdr is Vref, i.e. the voltage of N1 point is Vref.Drive transistor Tdr conducting.First power input
First power supply vdd of Vdd input is charged by the second pole of the driving transistor Tdr to driving transistor Tdr, i.e., to N2 point
It charges.When driving the current potential Vs of the second pole of transistor Tdr is Vref-vth, driving transistor Tdr cut-off was charged
Journey terminates, and the threshold voltage of transistor Tdr will be driven to be stored in memory module 60.Vth therein is driving transistor Tdr
Threshold voltage.
It is high level in fourth stage t4, scan1, e1 is high level, and third transistor T3 is connected, and the 4th transistor T4 is cut
Only.Third transistor T3 input data voltage, data voltage vdata is through third transistor T3 to driving transistor Tdr's at this time
Grid charges, and the current potential Vg of the grid of transistor Tdr is driven to become data voltage vdata from reference voltage Vref.Due to
The characteristic of capacitor itself, the voltage of the second end of memory module 60 can also change, that is, drive the second pole of transistor Tdr
Current potential Vs can also change.Memory module 60 is connected with the 4th capacitor C4 simultaneously, and the first electrode potential of the 4th capacitor C4 is the
One power supply, remains unchanged, therefore is become according to the current potential Vs of the second pole of the available driving transistor Tdr of principle of charge conservation
Vref-Vth+ (Vdata-Vref) c1/ (c1+c2), wherein c1 is the capacitance of memory module 60, and c2 is the electricity of the 4th capacitor C4
Capacitance.
It is low level in the 5th stage t5, scan1, e1 is low level, and third transistor T3 ends, and the 4th transistor T4 is led
It is logical.Since the 4th transistor T4 is connected, drive the current potential Vs of the second pole of transistor Tdr by Vref-Vth+ (Vdata-Vref)
C1/ (c1+c2) becomes VOLED+ vss, wherein VOLEDFor the pressure drop of light emitting diode, vss is second source input terminal Vss input
Second source.Therefore, according to the characteristic of capacitor itself and principle of charge conservation it is found that the grid potential Vg of driving transistor Tdr
Become VOLED+vss-(vdata-Vref)c1/(c1+c2)-Vref+vth+vdata.Because driving transistor Tdr is N-type crystal
Pipe, drives the electric current I of organic light-emitting diode to beWherein, β is a constant, and Vgs is that driving is brilliant
Voltage between the second pole and grid of body pipe Tdr.The current potential and driving transistor Tdr of the second pole of transistor Tdr will be driven
Grid potential substitution can obtain, (Vgs+vth)=(Vs-Vg+vth)=(VOLED+vss-(VOLED+vss-(vdata-Vref)c1/
(c1+c2)-Vref+vth+vdata)+vth)=((vdata-Vref) c1/ (c1+c2)+Vref-vdata)=(vdata-
Vref) c2/ (c1+c2), therefore driving current I is unrelated with the driving threshold voltage vth of transistor Tdr, realizes brilliant to driving
The compensation of the threshold voltage of body pipe Tdr, while organic light-emitting diode.
On the basis of the various embodiments described above, Figure 11 is the circuit knot of another pixel circuit provided in an embodiment of the present invention
Structure schematic diagram.As shown in figure 11, pixel circuit further includes reseting module 70.The of the control terminal of reseting module 70 and pixel circuit
Two scanning signal input terminal Scan2 electrical connection, the first end of reseting module 70 and the reset signal input terminal Vinit of pixel circuit
Electrical connection, the second end of reseting module 70 are electrically connected with the anode of light emitting diode.
Illustratively, reseting module 70 can be the 6th transistor T6.The grid of 6th transistor T6 is as reseting module
Make second pole of 70 control terminal, first end of the first pole of the 6th transistor T6 as reseting module 70, the 6th transistor T6
For the second end of reseting module 70.
Figure 12 is a kind of corresponding timing diagram of pixel circuit of Figure 11.Now in conjunction with Figure 11 and Figure 12 to the pixel circuit of Figure 11
Working principle is illustrated.
In Figure 12, scan2 is the timing of the second scanning signal of the second scanning signal input terminal Scan2 input, vinit
For the timing of the reset signal of reset signal input terminal Vinit input, other timing are identical as Fig. 8, and increase Figure 12 ratio Fig. 8 more
A reseting stage t0 is added.
It is low level in reseting stage t0, scan2, scan1 is high level, and e1 is high level, and the 6th transistor T6 is connected,
Third transistor T3, the 4th transistor T4 and the 5th transistor T5 cut-off.The reset signal of reset signal input terminal Vinit input
Vinit is low level, and the anode of light emitting diode is input to by the 6th transistor T6, is carried out to the anode of light emitting diode
It resets.
T1 and second stage t2, scan2 are high level, the 6th transistor T6 cut-off, therefore first stage in the first stage
The course of work of t1 and second stage t2 are identical as the course of work of Figure 10, and details are not described herein again.
The embodiment of the present invention also provides a kind of display device, and Figure 13 is a kind of display device provided in an embodiment of the present invention
Structural schematic diagram.As shown in figure 13, which includes array substrate 110, and array substrate 110 includes that the present invention is any
The pixel circuit that embodiment provides.The display device 100 can be with are as follows: display panel, mobile phone, tablet computer, television set, display
Any products or components having a display function such as device, laptop, Digital Frame.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of pixel circuit, including data voltage writing module, drive module, light emitting module, light emitting control module and compensation
Module；It is characterized in that, further including memory module, the memory module includes concatenated at least two capacitor；
The data voltage writing module is used to that data voltage to be written to the drive module；
The compensating module is for compensating the data voltage that the drive module is written；
The memory module is for storing the data voltage, if the memory module is used for described in the driving of the first driving frequency
Light emitting module shines, and the capacitor of the memory module is set to first capacitor value；If driving the hair with the second driving frequency
Optical module shines, and the capacitor of the memory module is set to the second capacitance；Wherein, first driving frequency is greater than described
Second driving frequency, the first capacitor value are less than second capacitance；
The drive module is used for according to the data voltage output drive signal；
The light emitting control module is exported for controlling the driving signal to the light emitting module, controls the light emitting module hair
Light.
2. pixel circuit according to claim 1, which is characterized in that the memory module further includes first end, second end
With at least one the first transistor；At least two capacitors are connected between the first end and second end of the memory module,
The first end and second end of the memory module is electric with the first of the control terminal of the drive module and the pixel circuit respectively
The electrical connection of source input terminal；The commonly connected pole of capacitor described in every two is electrically connected with the first pole of a first transistor, institute
The second pole for stating the first transistor is electrically connected with the second end of the memory module, the grid of each the first transistor respectively with
The different control terminals of the pixel circuit are electrically connected.
3. pixel circuit according to claim 2, which is characterized in that the memory module further includes second transistor；
First pole of the second transistor is electrically connected with the first end of the memory module, the second pole of the second transistor
It is electrically connected with the second pole of first capacitor, the second pole of the first pole of capacitor described in the latter and the previous capacitor
Electrical connection, the second pole of the last one capacitor is electrically connected with the second end of the memory module；
The grid controls different from the pixel circuit respectively of the grid and the second transistor of each the first transistor
End electrical connection.
4. pixel circuit according to claim 2, which is characterized in that the memory module further includes second transistor；
First pole of first capacitor is electrically connected with the first end of the memory module, the first pole of capacitor described in the latter
It is electrically connected with the second pole of the previous capacitor, the second pole of the last one capacitor and the first of the second transistor
Pole electrical connection, the second pole of the second transistor is electrically connected with the second end of the memory module；
The grid controls different from the pixel circuit respectively of the grid and the second transistor of each the first transistor
End electrical connection.
5. pixel circuit according to claim 3 or 4, which is characterized in that each the first transistor and second crystalline substance
At least one transistor turns in body pipe, the shutdown of other transistors.
6. pixel circuit according to claim 2, which is characterized in that the memory module includes two capacitors and one
A the first transistor, alternatively, the memory module includes three capacitors and two the first transistors.
7. pixel circuit according to claim 2, which is characterized in that the Data write. module includes third transistor,
The drive module includes driving transistor, and the light emitting module is light emitting diode；The light emitting control module includes the 4th
Transistor；The compensating module includes the 5th transistor；
First scanning signal of the grid and the pixel circuit of the grid of the third transistor and the 5th transistor is defeated
Entering end electrical connection, the first pole of the third transistor is electrically connected with the data signal input of the pixel circuit, and described the
Second pole of three transistors is electrically connected with the first pole of the driving transistor；The first pole and described the of the driving transistor
Second pole of four transistors is electrically connected, the second pole of the driving transistor and the second pole and the hair of the 5th transistor
The anode of optical diode is electrically connected；The cathode of the light emitting diode and the second source input terminal of the pixel circuit are electrically connected
It connects；First pole of the 4th transistor and the first power input of the pixel circuit and the second end of the memory module
Electrical connection, the grid of the 4th transistor are electrically connected with the first light emitting control end；It is described driving transistor grid with it is described
First pole of the 5th transistor and the first end electrical connection of the memory module.
8. pixel circuit according to claim 2, which is characterized in that the Data write. module includes third transistor,
The drive module includes driving transistor, and the light emitting module is light emitting diode；The light emitting control module includes the 4th
Transistor；The compensating module includes the 4th capacitor；
The grid of the third transistor is electrically connected with the first scanning signal input terminal of the pixel circuit, the third crystal
First pole of pipe is electrically connected with the data signal input of the pixel circuit, the second pole of the third transistor and the drive
The grid of dynamic transistor and the first end electrical connection of the memory module；First pole of the driving transistor and the 4th electricity
The first power input electrical connection of the first pole and the pixel circuit that hold, the second pole and described the of the driving transistor
First pole of the second pole of four capacitors, the second end of the memory module and the 4th transistor is electrically connected, and the described 4th is brilliant
Second pole of body pipe is electrically connected with the anode of the light emitting diode；The cathode of the light emitting diode and the pixel circuit
The electrical connection of second source input terminal；The grid of 4th transistor is electrically connected with the first light emitting control end of the pixel circuit
It connects.
9. pixel circuit according to claim 7 or 8, which is characterized in that further include reseting module；The reseting module
Control terminal is electrically connected with the second scanning signal input terminal of the pixel circuit, the first end of the reseting module and the pixel
The reset signal input terminal of circuit is electrically connected, and the second end of the reseting module is electrically connected with the anode of the light emitting diode.
10. a kind of display device, which is characterized in that including any pixel circuit of claim 1-9.
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