CN107256695B - Pixel circuit, its driving method, display panel and display device - Google Patents
Pixel circuit, its driving method, display panel and display device Download PDFInfo
- Publication number
- CN107256695B CN107256695B CN201710642949.5A CN201710642949A CN107256695B CN 107256695 B CN107256695 B CN 107256695B CN 201710642949 A CN201710642949 A CN 201710642949A CN 107256695 B CN107256695 B CN 107256695B
- Authority
- CN
- China
- Prior art keywords
- transistor
- pole
- switching transistor
- light emitting
- connect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
-
- 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]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of pixel circuit, its driving method, display panel and display devices, the signal at reference signal end is respectively supplied to grid and the second pole of driving transistor by initialization module before luminescent device shines, and the signal at first voltage end is supplied to the first pole of driving transistor.The grid of driving transistor and the first pole are resetted respectively using initialization module, avoid difference caused by the parasitic capacitance of the two, and then it avoids threshold value caused by voltage jump and grabs inconsistent problem, therefore can guarantee that the brightness of the first frame after height grayscale switches is consistent.Also, it is resetted in second pole of the initial phase of each frame to driving transistor, so that driving transistor has big electric current to flow through, force revert drives transistor because of threshold voltage shift caused by deviated stress, so that ghost phenomena be avoided to occur.
Description
Technical field
The present invention relates to field of display technology, espespecially a kind of pixel circuit, its driving method, display panel and display dress
It sets.
Background technique
Organic light emitting display (Organic Light Emitting Diode, OLED) is current flat-panel monitor research
One of the hot spot in field, compared with liquid crystal display, OLED has low low energy consumption, production cost, self-luminous, wide viewing angle and response
The advantages that speed is fast, currently, OLED, which has begun, replaces traditional liquid in flat display fields such as mobile phone, PDA, digital cameras
Crystal display screen (Liquid Crystal Display, LCD).Wherein, pixel circuit design is in OLED display core technology
Hold, there is important research significance.
A kind of structure of existing pixel circuit is as shown in Figure 1, include 6 switching transistors: M1~M6,1 driving are brilliant
Body pipe M0 and 1 capacitor C.Although corresponding input timing figure is as shown in Fig. 2, the circuit is improved by internal compensation because of technique
Uneven problem is shown caused by transistor M0 threshold voltage shift with driving caused by transistor ageing, but is cut in height grayscale
There is a problem of that first frame brightness is inconsistent after changing.Also, the pixel circuit shone after a period of time, since deviated stress can make
The threshold voltage of driving transistor M0 shifts, and by offset variation Different Effects, ghost phenomena is caused to occur.
Summary of the invention
The embodiment of the present invention provides a kind of pixel circuit, its driving method, display panel and display device, existing to improve
The inconsistent problem of existing first frame brightness after thering is ghost existing for pixel circuit and height grayscale to switch.
A kind of pixel circuit provided in an embodiment of the present invention, comprising: driving transistor, drive control module, light emitting control
Module, initialization module, anode reseting module and luminescent device；
The drive control module is used to write the threshold voltage of the signal of data signal end and the driving transistor
Enter to the grid of the driving transistor；
The light emitting control module is for mentioning the signal at the first voltage end under the control at the second light emitting control end
Supply it is described driving transistor the first pole, make under the control at the first light emitting control end it is described driving transistor the second pole with
The anode of the luminescent device is connected；
The initialization module is used to be respectively supplied to the signal at reference signal end before the luminescent device shines
The signal at the first voltage end is supplied to the first of the driving transistor by the grid of the driving transistor and the second pole
Pole；
The anode reseting module is used to provide the signal at the reference signal end before the luminescent device shines
To the anode of the luminescent device.
Correspondingly, the embodiment of the invention also provides a kind of driving methods of pixel circuit, comprising:
Node initializing stage, the first scanning signal end Xiang Suoshu and second light emitting control end provide the first current potential letter
Number, the second scanning signal end Xiang Suoshu and first light emitting control end provide the second electric potential signal；
Routing restoration stage, the first scanning signal of Xiang Suoshu end, second scanning signal end and the second light emitting control end
The first electric potential signal is provided, the first light emitting control end Xiang Suoshu provides the second electric potential signal；
Data write phase, the second scanning signal end Xiang Suoshu provide the first electric potential signal, the first scanning signal of Xiang Suoshu
End, first light emitting control end and second light emitting control end provide the second electric potential signal；
Light emitting phase, the first light emitting control end Xiang Suoshu and second light emitting control end provide the first electric potential signal, to
First scanning signal end and second scanning signal end provide the second electric potential signal.
Correspondingly, the embodiment of the invention also provides a kind of driving methods of pixel circuit, comprising:
Node initializing stage, the first scanning signal end Xiang Suoshu provide the first electric potential signal, the scanning letter of Xiang Suoshu second
Number end, first light emitting control end and second light emitting control end provide the second electric potential signal；
Routing restoration stage, the first scanning signal end Xiang Suoshu and second scanning signal end provide the first current potential letter
Number, the first light emitting control end Xiang Suoshu and second light emitting control end provide the second electric potential signal；
Data write phase, the second scanning signal end Xiang Suoshu provide the first electric potential signal, the first scanning signal of Xiang Suoshu
End, first light emitting control end and second light emitting control end provide the second electric potential signal；
Light emitting phase, the first light emitting control end Xiang Suoshu and second light emitting control end provide the first electric potential signal, to
First scanning signal end and second scanning signal end provide the second electric potential signal.
Correspondingly, the embodiment of the invention also provides a kind of driving methods of pixel circuit, comprising:
Node initializing stage, the first scanning signal end Xiang Suoshu provide the first electric potential signal, the scanning letter of Xiang Suoshu second
Number end, first light emitting control end and second light emitting control end provide the second electric potential signal；
Data write phase, the second scanning signal end Xiang Suoshu provide the first electric potential signal, the first scanning signal of Xiang Suoshu
End, first light emitting control end and second light emitting control end provide the second electric potential signal；
Light emitting phase, the first light emitting control end Xiang Suoshu and second light emitting control end provide the first electric potential signal, to
First scanning signal end and second scanning signal end provide the second electric potential signal.
Correspondingly, the embodiment of the invention also provides a kind of display panels, including above-mentioned provided in an embodiment of the present invention
A kind of pixel circuit.
Correspondingly, the embodiment of the invention also provides a kind of display device, including it is provided in an embodiment of the present invention above-mentioned aobvious
Show panel.
The present invention has the beneficial effect that:
Pixel circuit, its driving method, display panel and display device provided in an embodiment of the present invention are sent out in luminescent device
The signal at reference signal end is respectively supplied to grid and the second pole of driving transistor by initialization module before light, by the first electricity
The signal of pressure side is supplied to the first pole of driving transistor.Grid and the first pole point using initialization module to driving transistor
It is not resetted, avoids difference caused by the parasitic capacitance of the two, and then it is different to avoid the crawl of threshold value caused by voltage jump
The problem of cause, therefore can guarantee that the brightness of the first frame after height grayscale switches is consistent.Also, in the initialization rank of each frame
Section resets the second pole of driving transistor, so that driving transistor has big electric current to flow through, force revert drives crystal
Pipe is because of threshold voltage shift caused by deviated stress, so that ghost phenomena be avoided to occur.
Detailed description of the invention
Fig. 1 is a kind of existing structural schematic diagram of pixel circuit；
Fig. 2 is the corresponding input timing figure of existing pixel circuit；
Fig. 3 is a kind of structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Figure 11 a is a kind of corresponding input timing figure of pixel circuit shown in Fig. 4；
Figure 11 b is the corresponding another input timing figure of pixel circuit shown in Fig. 4；
Figure 12 is Fig. 5 and the corresponding input timing figure of pixel circuit shown in Fig. 8；
Figure 13 is Fig. 6, Fig. 7, Fig. 9 and the corresponding input timing figure of pixel circuit shown in Fig. 10；
Figure 14 is a kind of flow chart of the driving method of pixel circuit provided in an embodiment of the present invention；
Figure 15 is the flow chart of the driving method of another pixel circuit provided in an embodiment of the present invention；
Figure 16 is the flow chart of the driving method of another pixel circuit provided in an embodiment of the present invention；
Figure 17 is the structural schematic diagram of display panel provided in an embodiment of the present invention；
Figure 18 is the structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
Analogue simulation is carried out by pixel circuit to Fig. 1, when the (n-1)th frame is 0 grayscale, n-th frame is 255 grayscale, (n+1)th
When frame is 255 grayscale, the current potential in different time sections of first node N1 and N2 node is detected, testing result is as follows
Shown in table 1.
Table 1
It can be seen from above-mentioned table 1 in initial phase n-th frame second when the current potential and the (n+1)th frame of second node N2
The current potential of node N2 is different.This is because current potential-the 3V of the first node N1 of n-th frame is cut by 3.44V in initial phase
It changes, and the current potential -3V of the first node N1 of the (n+1)th frame is come by 1.5V switching, due to first in pixel circuit
There are parasitic capacitances between node N1 and second node N2, and second node N2 is in vacant state in initial phase, therefore
The current potential and n-th of the voltage change Δ V of first node N1 is inconsistent when will lead to the n-th frame in initial phase second node N2
The current potential of second node N2 is different when+1 frame, and then causes in data write phase, when n-th frame the current potential of first node N1 with
The current potential of first node N1 node is different when the (n+1)th frame, causes n-th frame brightness and the inconsistent problem of the (n+1)th frame brightness.
In view of this, the embodiment of the invention provides a kind of pixel circuit, its driving method and ORGANIC ELECTROLUMINESCENCE DISPLAYSs
Panel avoids the two from posting by resetting simultaneously to the current potential of first node N1 and second node N2 in initial phase
The problem that difference caused by raw capacitor brings brightness inconsistent.
In order to make the purpose of the present invention, the technical scheme and advantages are more clear, with reference to the accompanying drawing, to the embodiment of the present invention
The specific embodiment of the pixel circuit of offer, its driving method and organic electroluminescent display panel is described in detail.
It should be appreciated that preferred embodiment disclosed below is only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.And
In the absence of conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.
A kind of pixel circuit provided in an embodiment of the present invention, as shown in Figure 3, comprising: driving transistor M0, drive control mould
Block 01, light emitting control module 02, initialization module 03, anode reseting module 04 and luminescent device oled；
Drive control module 01 is used for the signal of data signal end data and the threshold voltage of transistor M0 is driven to write
Enter to the grid of driving transistor M0；
Light emitting control module 02 is used for the signal of first voltage end PVDD under the control of the second light emitting control end Emit2
It is supplied to the first pole of driving transistor M0, makes to drive the second of transistor M0 under the control of the first light emitting control end Emit1
Pole is connected with the anode of luminescent device oled；
Initialization module 03 is used to provide the signal of reference signal end Vref respectively before luminescent device oled shines
The signal of first voltage end PVDD is supplied to the first of driving transistor M0 by grid and the second pole to driving transistor M0
Pole；
Anode reseting module 04 is used to be supplied to the signal of reference signal end Vref before luminescent device oled shines
The anode of luminescent device oled.
Pixel circuit provided in an embodiment of the present invention, initialization module is by reference signal end before luminescent device shines
Signal is respectively supplied to grid and the second pole of driving transistor, and the signal at first voltage end is supplied to the of driving transistor
One pole.The grid of driving transistor and the first pole are resetted respectively using initialization module, avoid the parasitic capacitance of the two
Caused by difference, and then avoid threshold value caused by voltage jump and grab inconsistent problem, therefore can guarantee in high low ash
The brightness of first frame is consistent after rank switching.Also, it is answered in second pole of the initial phase of each frame to driving transistor
Position, so that driving transistor has big electric current to flow through, force revert drives transistor inclined because of threshold voltage caused by deviated stress
It moves, so that ghost phenomena be avoided to occur.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in figure 3, the cathode of luminescent device and second
Voltage end PVEE connection, the voltage of second voltage end PVEE are generally negative voltage or ground connection.
Combined with specific embodiments below, the present invention is described in detail.It should be noted that be in the present embodiment in order to
It preferably explains the present invention, but does not limit the present invention.
In the specific implementation, in display panel provided in an embodiment of the present invention, driving transistor is P-type transistor, right
In drive transistor be N-type transistor the case where, design principle is identical as the present invention, also belongs to the scope of protection of the invention.
Specifically, in pixel circuit provided in an embodiment of the present invention, luminescent device is generally Organic Light Emitting Diode, In
This is not construed as limiting.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in Figures 4 to 7, drive control module 01 is wrapped
Include third switching transistor M3, the 4th switching transistor M4 and capacitor C1；
The grid of third switching transistor M3 is connect with the second scanning signal end Scan2, and the of third switching transistor M3
One pole is connect with data signal end Data, and the second pole of third switching transistor M3 is connect with the first pole of driving transistor M0；
The grid of 4th switching transistor M4 is connect with the second scanning signal end Scan2, and the of the 4th switching transistor M4
One pole is connect with the second pole of driving transistor M0, and the second pole of the 4th switching transistor M4 and the grid of driving transistor M0 connect
It connects；
One end of capacitor is connect with first voltage end PVDD, and the other end is connect with the grid of driving transistor M0.
Specifically, third switching transistor M3 and the 4th switching transistor under the control of the second scanning signal end Scan2
M4 conducting, the 4th switching transistor M4 of conducting make that transistor M0 is driven to form diode structure, and the signal of data signal end is logical
It crosses after third switching transistor M3 reaches the first of driving transistor M0 extremely, is reached by the driving transistor M0 of diode structure
The grid of transistor M0 is driven, to being written the threshold voltage of the signal of data signal end Data and driving transistor M0 to drive
The grid of dynamic transistor M0.When luminescent device shines, the grid potential of driving transistor M0 is maintained using capacitor.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in Figures 4 to 7, the 4th switching transistor M4 is
Double-gate structure.The leakage current in the 4th switching transistor M4 cut-off can be reduced, in this way to advantageously reduce in light emitting phase
Interference of the leakage current of 4th switching transistor M4 to driving transistor M0, and then influence the driving current of driving transistor M0.
The above is only the specific structures for illustrating drive control module in pixel circuit, in the specific implementation, driving control
The specific structure of molding block is not limited to above structure provided in an embodiment of the present invention, can also be skilled person will appreciate that
Other structures, it is not limited here.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in Figures 4 to 7, light emitting control module 02 includes
First switch transistor M1 and second switch transistor M2；
The grid of first switch transistor M1 is connect with the second light emitting control end Emit2, and the of first switch transistor M1
One pole is connect with first voltage end PVDD, and the second pole of first switch transistor M1 is connect with the first pole of driving transistor M0；
The grid of second switch transistor M2 is connect with the first light emitting control end Emit1, and the of second switch transistor M2
One pole is connect with the second pole of driving transistor M0, and the second pole of second switch transistor M2 and the anode of luminescent device connect.
Specifically, when being connected under control of the first switch transistor M1 in the second light emitting control end Emit2, first voltage
The signal of PVDD is held to be transmitted to the first pole of driving transistor M0 by first switch transistor M1；When the first light emitting control end
When Emit1 controls second switch transistor M2 conducting, driving transistor M0 is connected with the anode of luminescent device.
The above is only the specific structures for illustrating light emitting control module in pixel circuit, and in the specific implementation, shine control
The specific structure of molding block is not limited to above structure provided in an embodiment of the present invention, can also be skilled person will appreciate that
Other structures, it is not limited here.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in figure 4, initialization module 03 and light emitting control
Module 02 shares first switch transistor M1, and initialization module 03 further includes the 5th switching transistor M5；
The grid of 5th switching transistor M5 is connect with the first scanning signal end Scan1, and the of the 5th switching transistor M5
One pole is connect with reference signal end Vref, and the second pole of the 5th switching transistor M5 is connect with the grid of driving transistor M0.
Specifically, when first switch transistor M1 is connected, the signal of first voltage end PVDD passes through first switch crystal
Pipe M1 is transmitted to the first pole of driving transistor M0；When 5th switching transistor M5 is connected, the signal of reference signal end Vref is logical
The grid that the 5th switching transistor M5 is transmitted to driving transistor M0 is crossed, as the 4th switching transistor M4 in drive control module
When conducting, the signal of the received reference signal end Vref of grid of transistor M0 is driven to be transmitted to by the 4th switching transistor M4
Drive the second pole of transistor M0.To realize that grid, the first pole and the second pole to driving transistor M0 reset, avoid
Threshold value caused by voltage jump grabs inconsistent problem, therefore can guarantee the brightness of the first frame after height grayscale switches
Unanimously.And there is big electric current logical by making to drive in transistor M0 with the 4th switching transistor M4 cooperation in drive control module
It crosses, force revert drives transistor M0 because of performance drift caused by bias.
Alternatively, optionally, in pixel circuit provided in an embodiment of the present invention, as shown in figure 5, initialization module 03 includes the
Five switching transistor M5 and the 7th switching transistor M7；
The grid of 5th switching transistor M5 is connect with the first scanning signal end Scan1, and the of the 5th switching transistor M5
One pole is connect with reference signal end Vref, and the second pole of the 5th switching transistor M5 is connect with the grid of driving transistor M0；
The grid of 7th switching transistor M7 is connect with the first scanning signal end Scan1, and the of the 7th switching transistor M7
One pole is connect with first voltage end PVDD, and the second pole of the 7th switching transistor M7 is connect with the first pole of driving transistor M0.
Specifically, when the first scanning signal end Scan1 control the 5th switching transistor M5 and the 7th switching transistor M7 is led
When logical, the signal of first voltage end PVDD is transmitted to the first pole of driving transistor M0 by the 7th switching transistor M7, reference
The signal of signal end Vref is transmitted to the grid of driving transistor M0 by the 5th switching transistor M5, when in drive control module
The 4th switching transistor M4 conducting when, drive transistor M0 the received reference signal end Vref of grid signal pass through the 4th
Switching transistor M4 is transmitted to the second pole of driving transistor M0.To realize to the driving grid of transistor M0, the first pole and
Second pole is resetted, and is avoided threshold value caused by voltage jump and is grabbed inconsistent problem, therefore can guarantee in high low ash
The brightness of first frame is consistent after rank switching.And by keeping driving brilliant with the 4th switching transistor M4 cooperation in drive control module
There is big electric current to pass through in body pipe M0, force revert drives transistor M0 because of performance drift caused by bias.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 6, initialization module 03 further includes the 8th
Switching transistor M8；
The grid of 8th switching transistor M8 is connect with the first scanning signal end Scan1, and the of the 8th switching transistor M8
One pole is connect with the grid of driving transistor M0, and the second pole of the 8th switching transistor M8 and the second pole of driving transistor M0 connect
It connects.
Initialization module does not need to cooperate with drive control module in this way, when the first scanning signal end Scan1 controls the 8th
When switching transistor M8 is connected, drive the signal of the received reference signal end Vref of grid of transistor M0 brilliant by the 8th switch
Body pipe M8 is transmitted to the second pole of driving transistor M0.To realize grid, the first pole and the second pole to driving transistor M0
It is resetted, avoids threshold value caused by voltage jump and grab inconsistent problem, therefore can guarantee to switch in height grayscale
The brightness of first frame is consistent afterwards.And making there is big electric current to pass through in driving transistor M0, force revert drives transistor M0 because partially
Performance drift caused by pressing.
Alternatively, optionally, in pixel circuit provided in an embodiment of the present invention, as shown in fig. 7, initialization module 03 further includes
8th switching transistor M8；
The grid of 8th switching transistor M8 is connect with the first scanning signal end Scan1, and the of the 8th switching transistor M8
One pole is connect with reference signal end Vref, and the second pole of the 8th switching transistor M8 is connect with the second pole of driving transistor M0.
Specifically, when the first scanning signal end Scan1 controls the 8th switching transistor M8 conducting, reference signal end Vref
Signal directly pass through the 8th switching transistor M8 be transmitted to driving transistor M0 the second pole.To realize to driving transistor
The grid of M0, the first pole and the second pole are resetted, and are avoided threshold value caused by voltage jump and are grabbed inconsistent problem, therefore
It can guarantee that the brightness of the first frame after height grayscale switches is consistent.And make there is big electric current to pass through in driving transistor M0, by force
System restores driving transistor M0 because of performance drift caused by bias.
Specifically, in pixel circuit provided in an embodiment of the present invention, as shown in Figures 4 to 7, the in initialization module the 5th
Switching transistor M5 is double-gate structure.The leakage current in the 5th switching transistor M5 cut-off can be reduced, in this way to be conducive to
It reduces and flows to the driving current of luminescent device in the influence of leakage current driving transistor M0 of the 5th switching transistor M5 of light emitting phase.
The above is only the specific structures for illustrating initialization module in pixel circuit, in the specific implementation, initialize mould
The specific structure of block is not limited to above structure provided in an embodiment of the present invention, can also be skilled person will appreciate that other
Structure, it is not limited here.
Optionally, in pixel circuit provided in an embodiment of the present invention, as shown in Figures 4 to 7, anode reseting module 04 includes
6th switching transistor M6；
The grid of 6th switching transistor M6 is connect with the second scanning signal end Scan2, and the of the 6th switching transistor M6
One pole is connect with reference signal end Vref, and the second pole of the 6th switching transistor M6 and the anode of luminescent device connect.
Specifically, when the second scanning signal end Scan2 controls the 6th switching transistor M6 conducting, reference signal end Vref
Signal the anode of luminescent device is transmitted to by the 6th switching transistor M6, to be resetted to anode.
The above is only the specific structures for illustrating pixel circuit Anodic reseting module, and in the specific implementation, anode is multiple
Position module specific structure be not limited to above structure provided in an embodiment of the present invention, can also be skilled person will appreciate that
Other structures, it is not limited here.
Specifically, to save signal port quantity, wiring space is saved, for Fig. 5 to pixel circuit shown in Fig. 7, such as
Shown in Fig. 8 to Figure 10, the first light emitting control end Emit1 and the second light emitting control end Emit2 are same signal end.
Specifically, any to switch from the point of view of reducing leakage current in pixel circuit provided in an embodiment of the present invention
Transistor can be set to double-gate structure, be not limited thereto.
Specifically, in order to which manufacture craft is unified, in pixel circuit provided in an embodiment of the present invention, as shown in Fig. 4 to Figure 10,
All switching transistors are P-type transistor；
Or all switching transistors are N-type transistor.
The embodiment of the present invention is not illustrated so that all switching transistors are P-type transistor as an example, but not
Constitute the restriction to transistor types in the application.
Specifically, in pixel circuit provided in an embodiment of the present invention, N-type transistor is led under high potential signal effect
It is logical, end under low-potential signal effect；P-type transistor is connected under low-potential signal effect, under high potential signal effect
Cut-off.
Specifically, in pixel circuit provided in an embodiment of the present invention, the first of transistor extremely can be source electrode, the second pole
First for drain electrode or transistor extremely can be to drain, and the second extremely source electrode is not distinguished specifically herein.
It is described below with reference to the course of work of the circuit timing diagram to pixel circuit provided in an embodiment of the present invention.It is following
High potential is indicated with 1 in description, and 0 indicates low potential.It should be noted that 1 and 0 is logic level, merely to preferably
The specific work process of the explanation embodiment of the present invention, rather than specific voltage value.
Example one
By taking pixel circuit shown in Fig. 4 as an example, corresponding input and output timing is as shown in fig. 11a.Specifically, it chooses as schemed
T1, T2, T3 and T4 four-stage in input timing figure shown in 11a.
Node initializing stage T1, Scan1=0, Scan2=1, Emit1=1, Emit2=0.
Due to Scan1=0, the 5th switching transistor M5 conducting is to be supplied to for the signal of reference signal end Vref
The current potential of one node N1, first node N1 are Vref.Due to Emit2=0, first switch transistor M1 conducting is with by first voltage
The signal of end PVDD is supplied to second node N2, and the current potential of second node N2 is that VDD, first node N1 and second node N2 are initial
Change and resets.Due to Scan2=1, third switching transistor M3, the 4th switching transistor M4 and the 6th switching transistor M6
Cut-off.Since Emit1=1, second switch transistor M2 end, luminescent device oled does not shine.
Routing restoration stage T2, Scan1=0, Scan2=0, Emit1=1, Emit2=0.
Due to Scan1=0, the 5th switching transistor M5 conducting is to be supplied to for the signal of reference signal end Vref
The current potential of one node N1, first node N1 are Vref.Due to Emit2=0, first switch transistor M1 conducting is with by first voltage
The signal of end PVDD is supplied to second node N2, and the current potential of second node N2 is that VDD, first node N1 and second node N2 are initial
Change and reset, driving transistor M0 is opened.Due to Scan2=0, third switching transistor M3, the 4th switching transistor M4 and
6th switching transistor M6 is to passing through.Since the 4th switching transistor M4 is connected, the received reference signal end first node N1
The signal of Vref is transmitted to third node N3, therefore transistor M0 is driven to have big electric current to flow through, and force revert drives transistor
M0 is because of performance drift caused by bias.Since Emit1=1, second switch transistor M2 end, luminescent device oled is not sent out
Light.
Data write phase T3, Scan1=1, Scan2=0, Emit1=1, Emit2=1.
Since Scan1=1, the 5th switching transistor M5 end.Scan2=0, therefore, third switching transistor M3
Conducting drives the first pole of transistor M0 the signal of data signal end Data to be supplied to, and the current potential of second node N2 becomes
Vdata；4th switching transistor M4 conducting is connected with the grid that will drive transistor M0 and the second pole, first node N1 and third
The current potential of node N3 becomes Vdata- | Vth |, at this time drive transistor M0 Vsg from VDD-Vref → Vdata-Vref → | Vth
|, therefore no matter high gray jump be middle grayscale or low ash rank jump be middle grayscale, can guarantee grab threshold voltage
Vth is identical；6th switching transistor M6 is connected the signal of reference signal end Vref to be supplied to the anode of luminescent device, to hair
Optical device resets.Since Emit1=Emit2=1, first switch transistor M1 and second switch transistor M2 end, hair
Optical device oled does not shine.
Light emitting phase T4, Scan1=1, Scan2=1, Emit1=0, Emit2=0.
Since Scan1=1, the 5th switching transistor M5 and the 7th switching transistor M7 end.Due to Scan2=1,
Therefore, third switching transistor M3, the 4th switching transistor M4 and the 6th switching transistor M6 cut-off.Due to Emit1=Emit2
=0, therefore first switch transistor M1 conducting is to be supplied to the of driving transistor M0 for the high potential of first voltage end PVDD
One pole, the current potential of second node N2 become VDD, drive the Vsg=VDD-Vdata+ of transistor M0 at this time | Vth |, I=K (Vsg-
|Vth|)2=K (VDD-Vdata)2；Second switch transistor M2 conducting, so that the driving current driving of driving transistor M0 shines
Device oled work shines.
It further, further include keeping before light emitting phase T4 after data write phase T3 in example one
Stage T3 ', corresponding timing diagram is as shown in figure 11b.
Keeping stage T3 ', Scan1=1, Scan2=1, Emit1=0, Emit2=1.
Since Emit1=0, second switch transistor M2 are connected, other switching transistors are turned off.Increasing the stage can be with
Extend the time that the second LED control signal end Emit2 is high potential, to make the first LED control signal end Emit1 and second
The maintenance duration of the high potential of LED control signal end Emit2 is equal, and it is shared luminous that the superior and the subordinate's pixel circuit may be implemented in this way
Signal is controlled, to avoid increasing new LED control signal.Furthermore it is also possible to avoid signal delay bring adverse effect.
Example two
By taking Fig. 5 and pixel circuit shown in Fig. 8 as an example, corresponding input and output timing is as shown in figure 12.Specifically, it chooses
T1, T2, T3 and T4 four-stage in input timing figure as shown in figure 12.
Node initializing stage T1, Scan1=0, Scan2=1, Emit1=Emit2=1.
Due to Scan1=0, the 5th switching transistor M5 conducting is to be supplied to for the signal of reference signal end Vref
The current potential of one node N1, first node N1 are Vref；7th switching transistor M7 conducting is with by the signal of first voltage end PVDD
It is supplied to second node N2, the current potential of second node N2 is VDD, first node N1 and second node N2 initial reset, driving
Transistor M0 is opened.Due to Scan2=1, third switching transistor M3, the 4th switching transistor M4 and the 6th switch are brilliant
Body pipe M6 cut-off.Since Emit1=Emit2=1, first switch transistor M1 and second switch transistor M2 end, hair
Optical device oled does not shine.
Routing restoration stage T2, Scan1=0, Scan2=0, Emit1=Emit2=1.
Due to Scan1=0, the 5th switching transistor M5 conducting is to be supplied to for the signal of reference signal end Vref
The current potential of one node N1, first node N1 are Vref；7th switching transistor M7 conducting is with by the signal of first voltage end PVDD
It is supplied to second node N2, the current potential of second node N2 is VDD, first node N1 and second node N2 initial reset, driving
Transistor M0 is opened.Due to Scan2=0, third switching transistor M3, the 4th switching transistor M4 and the 6th switch are brilliant
Body pipe M6 is to passing through.Since the 4th switching transistor M4 is connected, the signal of the received reference signal end Vref of first node N1 is passed
Third node N3 is transported to, therefore transistor M0 is driven to have big electric current to flow through, force revert drives transistor M0 because bias causes
Performance drift.Since Emit1=Emit2=1, first switch transistor M1 and second switch transistor M2 end, hair
Optical device oled does not shine.
Data write phase T3, Scan1=1, Scan2=0, Emit1=Emit2=1.
Since Scan1=1, the 5th switching transistor M5 and the 7th switching transistor M7 end.Scan2=0, because
This, third switching transistor M3 is connected so that the signal of data signal end Data to be supplied to the first pole of driving transistor M0, the
The current potential of two node N2 becomes Vdata；4th switching transistor M4 conducting is to lead the grid and the second pole that drive transistor M0
Logical, the current potential of first node N1 and third node N3 become Vdata- | Vth |, drive the Vsg of transistor M0 from VDD- at this time
Vref → Vdata-Vref → | Vth |, thus no matter high gray jump be middle grayscale or low ash rank jump is middle grayscale,
To guarantee that the threshold voltage vt h of crawl is identical；6th switching transistor M6 is connected to provide the signal of reference signal end Vref
To the anode of luminescent device, luminescent device is resetted.Due to Emit1=Emit2=1, first switch transistor M1 and
Two switching transistor M2 cut-off, luminescent device oled do not shine.
Light emitting phase T4, Scan1=1, Scan2=1, Emit1=Emit2=0.
Since Scan1=1, the 5th switching transistor M5 and the 7th switching transistor M7 end.Due to Scan2=1,
Therefore, third switching transistor M3, the 4th switching transistor M4 and the 6th switching transistor M6 cut-off.Due to Emit1=Emit2
=0, therefore first switch transistor M1 conducting is to be supplied to the of driving transistor M0 for the high potential of first voltage end PVDD
One pole, the current potential of second node N2 become VDD, drive the Vsg=VDD-Vdata+ of transistor M0 at this time | Vth |, I=K (Vsg-
|Vth|)2=K (VDD-Vdata)2；Second switch transistor M2 conducting, so that the driving current driving of driving transistor M0 shines
Device oled work shines.
It should be noted that in example two, for avoid signal delay, can in the intersection in T3 stage and T4 stage
To shift to an earlier date Scan2 or delay Emit1 and Emit, it is not limited thereto.
Example three
By taking Fig. 6, Fig. 7, Fig. 9 and pixel circuit shown in Fig. 10 as an example, corresponding input and output timing is as shown in figure 13.Tool
Body, choose T1, T2 and T3 three phases in input timing figure as shown in fig. 13 that.
Node initializing stage T1, Scan1=0, Scan2=1, Emit1=Emit2=1.
Due to Scan1=0, the 5th switching transistor M5 conducting is to be supplied to for the signal of reference signal end Vref
The current potential of one node N1, first node N1 are Vref；7th switching transistor M7 conducting is with by the signal of first voltage end PVDD
It is supplied to second node N2, the current potential of second node N2 is VDD, first node N1 and second node N2 initial reset, the 8th
The signal of transistor turns and reference signal end Vref are supplied to third node N3, and driving transistor M0 is opened, and is driven brilliant
Body pipe M0 has big electric current to flow through, and force revert drives transistor M0 because of performance drift caused by bias.Due to Scan2=1, because
This, third switching transistor M3, the 4th switching transistor M4 and the 6th switching transistor M6 cut-off.Due to Emit1=Emit2=
1, therefore first switch transistor M1 and second switch transistor M2 cut-off, luminescent device oled do not shine.
Data write phase T2, Scan1=1, Scan2=0, Emit1=Emit2=1.
Since Scan1=1, the 5th switching transistor M5 and the 7th switching transistor M7 end.Scan2=0, because
This, third switching transistor M3 is connected so that the signal of data signal end Data to be supplied to the first pole of driving transistor M0, the
The current potential of two node N2 becomes Vdata；4th switching transistor M4 conducting is to lead the grid and the second pole that drive transistor M0
Logical, the current potential of first node N1 and third node N3 become Vdata- | Vth |, drive the Vsg of transistor M0 from VDD- at this time
Vref → Vdata-Vref → | Vth | |, thus no matter high gray jump be middle grayscale or low ash rank jump is middle grayscale,
It can guarantee that the threshold voltage of crawl is identical；6th switching transistor M6 is connected so that the signal of reference signal end Vref to be supplied to
The anode of luminescent device resets luminescent device.Due to Emit1=Emit2=1, first switch transistor M1 and second
Switching transistor M2 cut-off, luminescent device oled do not shine.
Light emitting phase T3, Scan1=1, Scan2=1, Emit1=Emit2=0.
Since Scan1=1, the 5th switching transistor M5 and the 7th switching transistor M7 end.Due to Scan2=1,
Therefore, third switching transistor M3, the 4th switching transistor M4 and the 6th switching transistor M6 cut-off.Due to Emit1=Emit2
=0, therefore first switch transistor M1 conducting is to be supplied to the of driving transistor M0 for the high potential of first voltage end PVDD
One pole, the current potential of second node N2 become VDD, drive the Vsg=VDD-Vdata+ of transistor M0 at this time | Vth |, I=K (Vsg-
|Vth|)2=K (VDD-Vdata)2；Second switch transistor M2 conducting, so that the driving current driving of driving transistor M0 shines
Device oled work shines.
It should be noted that in example three, for avoid signal delay, can in the intersection in T1 stage and T2 stage
It, can be by Scan2 in advance or by Emit1 in the intersection in T2 stage and T3 stage Scan2 in advance or to be delayed to Scan1
It delays, is not limited thereto with Emit.
Analogue simulation is carried out by the pixel circuit to figure Fig. 4 to Figure 10, when the (n-1)th frame is 0 grayscale, n-th frame is 255 ashes
Rank detects the current potential in different time sections of first node N1 and N2 node when the (n+1)th frame is 255 grayscale, detects
As a result as shown in table 2 below.
Table 2
It can be seen from above-mentioned table 2 in initial phase n-th frame second when the current potential and the (n+1)th frame of second node N2
The current potential of node N2 is identical.Specifically, in initial phase, the current potential -3V of the first node N1 of n-th frame is cut by 3.44V
It changes, the current potential -3V of the first node N1 of the (n+1)th frame is come by 1.5V switching, although first segment in pixel circuit
There are parasitic capacitance between point N1 and second node N2, but second node N2 in initial phase by first voltage end reset potential
It is -3, therefore inconsistent second node N2 when will not influence the n-th frame in initial phase of voltage change Δ V of first node N1
Current potential and the (n+1)th frame when second node N2 current potential, and then will not influence in data write phase, first segment when n-th frame
The current potential of first node N1 node when the current potential and the (n+1)th frame of point N1 ensure that n-th frame brightness is consistent with the (n+1)th frame brightness.
Based on the same inventive concept, for pixel circuit shown in Fig. 4, the embodiment of the invention also provides a kind of drivings should
The driving method of pixel circuit, as shown in figure 14, comprising:
S1401, node initializing stage provide the first current potential letter to the first scanning signal end and the second light emitting control end
Number, the second electric potential signal is provided to the second scanning signal end and the first light emitting control end；
S1402, routing restoration stage are mentioned to the first scanning signal end, the second scanning signal end and the second light emitting control end
For the first electric potential signal, the second electric potential signal is provided to the first light emitting control end；
S1403, data write phase, to the second scanning signal end provide the first electric potential signal, to the first scanning signal end,
First light emitting control end and the second light emitting control end provide the second electric potential signal；
S1404, light emitting phase provide the first electric potential signal to the first light emitting control end and the second light emitting control end, to the
Scan signal end and the second scanning signal end provide the second electric potential signal.
Specifically, as shown in fig. 11a, concrete operating principle is referring to example for the corresponding timing diagram of driving method shown in Figure 14
One, details are not described herein.
Specifically, in driving method provided in an embodiment of the present invention, after data write phase, light emitting phase it
Before, further includes: it is kept for the stage, provides the first electric potential signal to the first light emitting control end, to the first scanning signal end, the second scanning
Signal end and the second light emitting control end provide the second electric potential signal.Corresponding timing diagram as shown in figure 11b, join by concrete operating principle
See example one, details are not described herein.
Based on the same inventive concept, for Fig. 5 and pixel circuit shown in Fig. 8, the embodiment of the invention also provides one kind
The driving method of the pixel circuit is driven, as shown in figure 15, comprising:
S1501, node initializing stage provide the first electric potential signal to the first scanning signal end, to the second scanning signal
End, the first light emitting control end and the second light emitting control end provide the second electric potential signal；
S1502, routing restoration stage provide the first electric potential signal to the first scanning signal end and the second scanning signal end,
The second electric potential signal is provided to the first light emitting control end and the second light emitting control end；
S1503, data write phase, to the second scanning signal end provide the first electric potential signal, to the first scanning signal end,
First light emitting control end and the second light emitting control end provide the second electric potential signal；
S1504, light emitting phase provide the first electric potential signal to the first light emitting control end and the second light emitting control end, to the
Scan signal end and the second scanning signal end provide the second electric potential signal.
Specifically, the corresponding timing diagram of driving method shown in figure 15 is as shown in figure 12, and concrete operating principle is referring to example
Two, details are not described herein.
Based on the same inventive concept, for Fig. 6, Fig. 7, Fig. 9 and pixel circuit shown in Fig. 10, the embodiment of the present invention is also mentioned
A kind of driving method for driving the pixel circuit is supplied, as shown in figure 16, comprising:
S1601, node initializing stage provide the first electric potential signal to the first scanning signal end, to the second scanning signal
End, the first light emitting control end and the second light emitting control end provide the second electric potential signal；
S1602, data write phase, to the second scanning signal end provide the first electric potential signal, to the first scanning signal end,
First light emitting control end and the second light emitting control end provide the second electric potential signal；
S1603, light emitting phase provide the first electric potential signal to the first light emitting control end and the second light emitting control end, to the
Scan signal end and the second scanning signal end provide the second electric potential signal.
Specifically, the corresponding timing diagram of driving method shown in figure 15 is as shown in figure 13, and concrete operating principle is referring to example
Three, details are not described herein.
Specifically, in driving method provided in an embodiment of the present invention, the first electric potential signal is low-potential signal, the second electricity
Position signal is high potential signal；Alternatively, the first electric potential signal is high potential signal, the second electric potential signal is low-potential signal.Figure
11a to Figure 13 is using the first electric potential signal as low-potential signal, and second electric potential signal is to be illustrated for high potential signal.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display panels, as shown in figure 17, including this hair
Any of the above-described kind of pixel circuit 10 that bright embodiment provides.The principle and a kind of aforementioned pixel solved the problems, such as due to the display panel
Circuit is similar, therefore the implementation of the display panel may refer to the implementation of aforementioned pixel circuit, and overlaps will not be repeated.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display devices, including the embodiment of the present invention to mention
Any of the above-described kind of display panel supplied.The display device can be mobile phone as shown in figure 18, or tablet computer, TV
Any products or components having a display function such as machine, display, laptop, Digital Frame, navigator.Due to the display
The principle that device solves the problems, such as is similar to a kind of aforementioned display panel, therefore the implementation of the display device may refer to aforementioned display
The implementation of panel, overlaps will not be repeated.
Pixel circuit, its driving method, display panel and display device provided in an embodiment of the present invention are sent out in luminescent device
The signal at reference signal end is respectively supplied to grid and the second pole of driving transistor by initialization module before light, by the first electricity
The signal of pressure side is supplied to the first pole of driving transistor.Grid and the first pole point using initialization module to driving transistor
It is not resetted, avoids difference caused by the parasitic capacitance of the two, and then it is different to avoid the crawl of threshold value caused by voltage jump
The problem of cause, therefore can guarantee that the brightness of the first frame after height grayscale switches is consistent.Also, in the initialization rank of each frame
Section resets the second pole of driving transistor, so that driving transistor has big electric current to flow through, force revert drives crystal
Pipe is because of threshold voltage shift caused by deviated stress, so that ghost phenomena be avoided to occur.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of pixel circuit characterized by comprising driving transistor, drive control module, light emitting control module, initial
Change module, anode reseting module and luminescent device；
The drive control module be used for by the signal of data signal end and it is described driving transistor threshold voltage be written to
The grid of the driving transistor；
The light emitting control module is used under the control at the second light emitting control end for the signal at first voltage end being supplied to described
The first pole for driving transistor makes the second pole of the driving transistor shine with described under the control at the first light emitting control end
The anode of device is connected；
The initialization module is used to before the luminescent device shines for the signal at reference signal end being respectively supplied to described
The signal at the first voltage end is supplied to the first pole of the driving transistor by grid and the second pole for driving transistor；
The anode reseting module is used to that the signal at the reference signal end to be supplied to institute before the luminescent device shines
State the anode of luminescent device；
The light emitting control module includes first switch transistor and second switch transistor；
The grid of the first switch transistor is connect with second light emitting control end, and the first of the first switch transistor
Pole is connect with the first voltage end, and the first pole of the second pole of the first switch transistor and the driving transistor connects
It connects；
The grid of the second switch transistor is connect with first light emitting control end, and the first of the second switch transistor
Pole is connect with the second pole of the driving transistor, the second pole of the second switch transistor and the anode of the luminescent device
Connection；
When the initialization module and the light emitting control module share the first switch transistor, and the initialization module
When further including five switching transistors, the grid of the 5th switching transistor is connect with the first scanning signal end, and the described 5th
First pole of switching transistor is connect with the reference signal end, and the second pole of the 5th switching transistor and the driving are brilliant
The grid of body pipe connects；
When the initialization module includes the 5th switching transistor and the 7th switching transistor；
The grid of 5th switching transistor is connect with the first scanning signal end, the first pole of the 5th switching transistor with
The reference signal end connection, the second pole of the 5th switching transistor are connect with the grid of the driving transistor；
The grid of 7th switching transistor is connect with first scanning signal end, and the first of the 7th switching transistor
Pole is connect with the first voltage end, and the first pole of the second pole of the 7th switching transistor and the driving transistor connects
It connects；
The initialization module further includes the 8th switching transistor；
The grid of 8th switching transistor is connect with first scanning signal end, and the first of the 8th switching transistor
Pole is connect with the grid of the driving transistor, the second pole of the 8th switching transistor and the second of the driving transistor
Pole connection；
Alternatively, the grid of the 8th switching transistor is connect with first scanning signal end, the 8th switching transistor
The first pole connect with the reference signal end, the second pole of the 8th switching transistor and it is described driving transistor second
Pole connection.
2. pixel circuit as described in claim 1, which is characterized in that the drive control module includes third switch crystal
Pipe, the 4th switching transistor and capacitor；
The grid of the third switching transistor is connect with the second scanning signal end, the first pole of the third switching transistor with
The data signal end connection, the second pole of the third switching transistor are connect with the first pole of the driving transistor；
The grid of 4th switching transistor is connect with the second scanning signal end, the first pole of the 4th switching transistor with
The grid of the second pole connection of the driving transistor, the second pole of the 4th switching transistor and the driving transistor connects
It connects；
One end of the capacitor is connect with the first voltage end, and the other end is connect with the grid of the driving transistor.
3. pixel circuit as claimed in claim 2, which is characterized in that the anode reseting module includes the 6th switch crystal
Pipe；
The grid of 6th switching transistor is connect with second scanning signal end, and the first of the 6th switching transistor
Pole is connect with the reference signal end, and the second pole of the 6th switching transistor is connect with the anode of the luminescent device.
4. pixel circuit as described in any one of claims 1-3, which is characterized in that first light emitting control end and described the
Two light emitting control ends are same signal end.
5. pixel circuit as described in any one of claims 1-3, which is characterized in that the 5th switching transistor is double grid knot
Structure.
6. pixel circuit as claimed in claim 2, which is characterized in that the 4th switching transistor is double-gate structure.
7. pixel circuit as described in any one of claims 1-3, which is characterized in that all switching transistors are N-type crystal
It manages or is P-type transistor.
8. a kind of driving method for driving pixel circuit as claimed in claim 2 characterized by comprising
The node initializing stage, the first electric potential signal of the first scanning signal end Xiang Suoshu offer, the second scanning signal of Xiang Suoshu end,
First light emitting control end and second light emitting control end provide the second electric potential signal；
Data write phase, the second scanning signal end Xiang Suoshu provide the first electric potential signal, the first scanning signal of Xiang Suoshu end, institute
It states the first light emitting control end and second light emitting control end and the second electric potential signal is provided；
Light emitting phase, the first light emitting control end Xiang Suoshu and second light emitting control end provide the first electric potential signal, Xiang Suoshu
First scanning signal end and second scanning signal end provide the second electric potential signal.
9. a kind of display panel, which is characterized in that including such as described in any item pixel circuits of claim 1-7.
10. a kind of display device, which is characterized in that including display panel as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642949.5A CN107256695B (en) | 2017-07-31 | 2017-07-31 | Pixel circuit, its driving method, display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642949.5A CN107256695B (en) | 2017-07-31 | 2017-07-31 | Pixel circuit, its driving method, display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107256695A CN107256695A (en) | 2017-10-17 |
| CN107256695B true CN107256695B (en) | 2019-11-19 |
Family
ID=60026419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710642949.5A Active CN107256695B (en) | 2017-07-31 | 2017-07-31 | Pixel circuit, its driving method, display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107256695B (en) |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10854684B2 (en) | 2016-02-18 | 2020-12-01 | Boe Technology Group Co., Ltd. | Pixel arrangement structure and driving method thereof, display substrate and display device |
| CN110137213A (en) | 2018-02-09 | 2019-08-16 | 京东方科技集团股份有限公司 | Pixel arrangement structure and its display methods, display base plate |
| US11233096B2 (en) | 2016-02-18 | 2022-01-25 | Boe Technology Group Co., Ltd. | Pixel arrangement structure and driving method thereof, display substrate and display device |
| US11448807B2 (en) | 2016-02-18 | 2022-09-20 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display substrate, fine metal mask set and manufacturing method thereof |
| US11264430B2 (en) | 2016-02-18 | 2022-03-01 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Pixel arrangement structure with misaligned repeating units, display substrate, display apparatus and method of fabrication thereof |
| US11747531B2 (en) | 2016-02-18 | 2023-09-05 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display substrate, fine metal mask set and manufacturing method thereof |
| CN107564456B (en) * | 2017-10-20 | 2020-05-15 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN107610651B (en) * | 2017-10-31 | 2019-11-08 | 武汉天马微电子有限公司 | The driving method and display panel of pixel circuit, pixel circuit |
| US11574960B2 (en) | 2018-02-09 | 2023-02-07 | Boe Technology Group Co., Ltd. | Pixel arrangement structure, display substrate, display device and mask plate group |
| CN115542617A (en) | 2018-02-09 | 2022-12-30 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN112186022A (en) | 2018-02-09 | 2021-01-05 | 京东方科技集团股份有限公司 | Pixel arrangement structure, display substrate and display device |
| CN109817165B (en) * | 2019-03-08 | 2021-04-20 | 京东方科技集团股份有限公司 | Pixel driving circuit, pixel driving method, display panel and display device |
| CN110060635A (en) * | 2019-04-08 | 2019-07-26 | 深圳市华星光电半导体显示技术有限公司 | Pixel circuit and OLED display panel |
| TWI696993B (en) * | 2019-05-17 | 2020-06-21 | 友達光電股份有限公司 | Pixel circuit |
| CN110223640A (en) * | 2019-06-26 | 2019-09-10 | 昆山国显光电有限公司 | A kind of pixel-driving circuit and display device |
| US11735108B2 (en) | 2019-07-31 | 2023-08-22 | Boe Technology Group Co., Ltd. | Display substrate and preparation method thereof, display panel, and display device |
| TWI713006B (en) * | 2019-09-24 | 2020-12-11 | 友達光電股份有限公司 | Pixel circuit |
| CN110675815A (en) * | 2019-09-26 | 2020-01-10 | 武汉天马微电子有限公司 | Pixel driving circuit, driving method thereof and display device |
| KR20210050050A (en) | 2019-10-25 | 2021-05-07 | 삼성디스플레이 주식회사 | Pixel and display device having the same |
| CN110827754B (en) * | 2019-11-04 | 2021-05-11 | Oppo广东移动通信有限公司 | Compensating circuit of OLED (organic light emitting diode) driving circuit and display |
| CN112349250B (en) | 2020-11-20 | 2022-02-25 | 武汉天马微电子有限公司 | Display panel and driving method |
| CN112397026B (en) | 2020-12-04 | 2022-06-28 | 武汉天马微电子有限公司 | Pixel driving circuit, display panel and driving method thereof |
| CN112669772B (en) * | 2020-12-28 | 2022-12-09 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN112885884B (en) * | 2021-01-29 | 2023-06-27 | 鄂尔多斯市源盛光电有限责任公司 | Display panel, manufacturing method thereof and display device |
| CN112908266A (en) * | 2021-02-03 | 2021-06-04 | 京东方科技集团股份有限公司 | Display panel, pixel driving circuit and driving method thereof |
| CN113223459B (en) * | 2021-04-29 | 2022-09-20 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof, display substrate and display device |
| CN116580671A (en) * | 2021-05-17 | 2023-08-11 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113299242A (en) * | 2021-05-24 | 2021-08-24 | 京东方科技集团股份有限公司 | Pixel circuit, driving method and display device |
| WO2023004817A1 (en) * | 2021-07-30 | 2023-02-02 | 京东方科技集团股份有限公司 | Pixel driving circuit and driving method therefor, and display panel |
| CN113870790B (en) * | 2021-09-14 | 2023-04-14 | 武汉天马微电子有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN113870771B (en) * | 2021-09-30 | 2023-01-17 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN113990261B (en) * | 2021-11-15 | 2023-02-24 | 合肥维信诺科技有限公司 | Pixel circuit, driving method thereof and display panel |
| CN114170959A (en) * | 2021-11-25 | 2022-03-11 | 云谷（固安）科技有限公司 | Pixel driving circuit and display panel |
| CN114743504B (en) * | 2022-05-18 | 2023-12-19 | 昆山国显光电有限公司 | Pixel circuit, display panel and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558287A (en) * | 2017-01-25 | 2017-04-05 | 上海天马有机发光显示技术有限公司 | Organic light emissive pixels drive circuit, driving method and organic electroluminescence display panel |
| CN106710529A (en) * | 2016-12-19 | 2017-05-24 | 上海天马有机发光显示技术有限公司 | Pixel driving circuit, driving method, and organic light-emitting display panel |
| CN106910468A (en) * | 2017-04-28 | 2017-06-30 | 上海天马有机发光显示技术有限公司 | The driving method of display panel, display device and image element circuit |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101411621B1 (en) * | 2012-12-24 | 2014-07-02 | 엘지디스플레이 주식회사 | Organic light emitting diode display device and method for driving the same |
| KR102072201B1 (en) * | 2013-06-28 | 2020-02-03 | 삼성디스플레이 주식회사 | Organic light emitting display device and driving method thereof |
| KR102442177B1 (en) * | 2015-09-16 | 2022-09-13 | 삼성디스플레이 주식회사 | Pixel, organic light emitting display device including the pixel and driving method of the pixel |
| CN105489168B (en) * | 2016-01-04 | 2018-08-07 | 京东方科技集团股份有限公司 | Pixel-driving circuit, image element driving method and display device |
| CN106205491B (en) * | 2016-07-11 | 2018-09-11 | 京东方科技集团股份有限公司 | A kind of pixel circuit, its driving method and relevant apparatus |
| CN106373528B (en) * | 2016-10-28 | 2019-02-19 | 上海天马微电子有限公司 | Display device, pixel-driving circuit and image element driving method |
| CN106652912B (en) * | 2016-12-13 | 2020-05-19 | 上海天马有机发光显示技术有限公司 | Organic light-emitting pixel driving circuit, driving method and organic light-emitting display panel |
| CN106782330B (en) * | 2016-12-20 | 2019-03-12 | 上海天马有机发光显示技术有限公司 | Organic light emissive pixels driving circuit, driving method and organic light emitting display panel |
| CN106531075B (en) * | 2017-01-10 | 2019-01-22 | 上海天马有机发光显示技术有限公司 | Organic light emissive pixels driving circuit, driving method and organic light emitting display panel |
-
2017
- 2017-07-31 CN CN201710642949.5A patent/CN107256695B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710529A (en) * | 2016-12-19 | 2017-05-24 | 上海天马有机发光显示技术有限公司 | Pixel driving circuit, driving method, and organic light-emitting display panel |
| CN106558287A (en) * | 2017-01-25 | 2017-04-05 | 上海天马有机发光显示技术有限公司 | Organic light emissive pixels drive circuit, driving method and organic electroluminescence display panel |
| CN106910468A (en) * | 2017-04-28 | 2017-06-30 | 上海天马有机发光显示技术有限公司 | The driving method of display panel, display device and image element circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107256695A (en) | 2017-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107256695B (en) | Pixel circuit, its driving method, display panel and display device | |
| CN107316606B (en) | A kind of pixel circuit, its driving method display panel and display device | |
| CN107316613B (en) | Pixel circuit, its driving method, organic light emitting display panel and display device | |
| CN107274830B (en) | A kind of pixel circuit, its driving method and organic electroluminescent display panel | |
| CN107452339B (en) | Pixel circuit, its driving method, organic light emitting display panel and display device | |
| CN107610652B (en) | Pixel circuit, its driving method, display panel and display device | |
| CN107170408B (en) | Pixel circuit, driving method, organic electroluminescent display panel and display device | |
| CN106910468B (en) | The driving method of display panel, display device and pixel circuit | |
| CN209265989U (en) | Shift register, emission control circuit, display panel | |
| CN107507567B (en) | A kind of pixel compensation circuit, its driving method and display device | |
| CN107068057B (en) | A kind of pixel-driving circuit, its driving method and display panel | |
| CN107452338B (en) | A kind of pixel circuit, its driving method, display panel and display device | |
| CN105225626B (en) | Organic light-emitting diode pixel drive circuit, its display panel and display device | |
| CN106205491B (en) | A kind of pixel circuit, its driving method and relevant apparatus | |
| CN108492770A (en) | A kind of pixel compensation circuit, its driving method and display panel, display device | |
| CN107342049B (en) | The driving method of display panel and display panel | |
| CN105913802B (en) | A kind of organic electroluminescent LED display panel and its driving method | |
| CN108877669A (en) | A kind of pixel circuit, driving method and display device | |
| CN106887210B (en) | Display panel, pixel-driving circuit and its driving method | |
| CN107945743A (en) | A kind of image element circuit, its driving method and display device | |
| CN107146577B (en) | A kind of pixel circuit, its driving method, display panel and display device | |
| JP7413022B2 (en) | Display panel, its driving method, and display device | |
| CN105304020B (en) | Organic light-emitting diode pixel drive circuit, array base palte and display device | |
| CN104933991B (en) | Pixel-driving circuit, display base plate and its driving method, display device | |
| CN106297667A (en) | Image element circuit and driving method, array base palte and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211019 Address after: No.8 liufangyuan Road, Dongyi Industrial Park, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee after: WUHAN TIANMA MICRO-ELECTRONICS Co.,Ltd. Patentee after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, 6111 Longdong Avenue, Pudong New Area, Shanghai 201201 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |
|
| TR01 | Transfer of patent right |