CN110223640A - A kind of pixel-driving circuit and display device - Google Patents
A kind of pixel-driving circuit and display device Download PDFInfo
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- CN110223640A CN110223640A CN201910563742.8A CN201910563742A CN110223640A CN 110223640 A CN110223640 A CN 110223640A CN 201910563742 A CN201910563742 A CN 201910563742A CN 110223640 A CN110223640 A CN 110223640A
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- 239000010409 thin film Substances 0.000 claims abstract description 85
- 230000003760 hair shine Effects 0.000 claims abstract description 8
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- 239000010408 film Substances 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 description 17
- 238000003860 storage Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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]
- 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
-
- 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]
- G09G3/3275—Details of drivers for data electrodes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a kind of pixel-driving circuit and display devices, pixel-driving circuit includes drive module, Data write. module, memory module and threshold value compensation module, drive module is used to provide driving current to organic light-emitting structure, organic light-emitting structure responds driving current and shines, drive module includes driving transistor, Data write. module is used for the control terminal of data-signal write driver module in data write phase, memory module is for maintaining the control terminal of drive module in the current potential of light emitting phase, threshold value compensation module is used to carry out initialization in current potential of the initial phase to the control terminal of drive module and grabs the threshold voltage of driving transistor to the control terminal of drive module in data write phase, the thin film transistor (TFT) for constituting threshold value compensation module is the oxide thin film transistor of multi-gate structure.According to the technical solution of the present invention, the problem of improving the control terminal electric leakage of drive module, the display effect of display device is optimized.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of pixel-driving circuit and display devices.
Background technique
Organic light-emitting display device has generally comprised several pixels, and each pixel includes pixel-driving circuit and organic hair
Photo structure, pixel-driving circuit provide driving current to organic light-emitting structure, and organic light-emitting structure response pixel-driving circuit mentions
The driving current of confession shines, and organic light-emitting display device realizes display.
It include driving transistor in pixel-driving circuit, driving transistor generates the luminous driving of driving organic light-emitting structure
Electric current.Currently, pixel-driving circuit in the process of work, drives the grid of transistor, there are electrical leakage problems, influence display dress
The display effect set.
Summary of the invention
The present invention provides a kind of pixel-driving circuit and display device, in the normal driving function for realizing pixel-driving circuit
Can while, improve drive module control terminal electric leakage the problem of, optimize the display effect of display device.
In a first aspect, the embodiment of the invention provides a kind of pixel-driving circuits, comprising:
Drive module, the drive module are used to provide driving current, the organic light-emitting structure to organic light-emitting structure
It responds the driving current to shine, the drive module includes driving transistor；
Data write. module, the Data write. module are used to that the driving to be written in data-signal in data write phase
The control terminal of module；
Memory module, the memory module is for maintaining the control terminal of the drive module in the current potential of light emitting phase；
Threshold value compensation module, the threshold value compensation module are used in initial phase to the control terminal of the drive module
Current potential carries out initialization and grabs the threshold voltage for driving transistor to the drive module in data write phase
Control terminal；Wherein, the thin film transistor (TFT) for constituting the threshold value compensation module is the oxide thin film transistor of multi-gate structure.
Further, the first end of the threshold value compensation module is electrically connected with the second end of the drive module, the threshold
The second end of value compensating module is electrically connected with the control terminal of the drive module, the first end of the drive module and the data
Writing module electrical connection.
Further, the first end of the threshold value compensation module is electrically connected with the first end of the drive module, the threshold
The second end of value compensating module is electrically connected with the control terminal of the drive module, the second end of the drive module and the data
Writing module electrical connection.
Further, the pixel-driving circuit further include:
First initialization module, first initialization module are used in the initial phase to the drive module
The current potential of control terminal is initialized, and the thin film transistor (TFT) for constituting first initialization module is oxide thin film transistor.
Further, the thin film transistor (TFT) for constituting first initialization module is the sull crystal of multi-gate structure
Pipe.
Further, the first end incoming reference signal of first initialization module, second end and the threshold compensation
The first end of module is electrically connected.
Further, the pixel-driving circuit further include:
Second initialization module, second initialization module are used in the initial phase to the organic light emission knot
The current potential of the first electrode of structure is initialized, and the thin film transistor (TFT) for constituting second initialization module is that sull is brilliant
Body pipe.
Further, the thin film transistor (TFT) for constituting second initialization module is the sull crystal of multi-gate structure
Pipe.
Further, the pixel-driving circuit further include:
First initialization module, first initialization module are used in the initial phase to the drive module
The current potential of control terminal is initialized, and the thin film transistor (TFT) for constituting first initialization module is oxide thin film transistor；
Second initialization module, second initialization module are used in the initial phase to the organic light emission knot
The current potential of the first electrode of structure is initialized, and the thin film transistor (TFT) for constituting second initialization module is that sull is brilliant
Body pipe；
The control terminal of first initialization module is electrically connected or described with the control terminal of second initialization module
The control terminal of second initialization module is electrically connected with the control terminal of the threshold value compensation module.
Second aspect, the embodiment of the invention also provides a kind of display device, display device includes the picture such as first aspect
Plain driving circuit.
The embodiment of the invention provides a kind of pixel-driving circuit and display devices, and it includes driving that pixel-driving circuit, which is arranged,
Module, Data write. module, memory module and threshold value compensation module, drive module are used to provide driving electricity to organic light-emitting structure
Stream, organic light-emitting structure respond driving current and shine, and drive module includes driving transistor, and Data write. module is used in data
Write phase is by the control terminal of data-signal write driver module, and memory module is for maintaining the control terminal of drive module shining
The current potential in stage, threshold value compensation module be used for current potential of the initial phase to the control terminal of drive module carry out initialization and
In the threshold voltage that data write phase grabs driving transistor to the control terminal of drive module, the thin of threshold value compensation module is constituted
Film transistor is the oxide thin film transistor of multi-gate structure, in the same of the normal driving function of realizing pixel-driving circuit
When, improve drive module control terminal electric leakage the problem of, optimize the display effect of display device.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of structural schematic diagram of pixel-driving circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of particular circuit configurations schematic diagram of pixel-driving circuit provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 4 is the particular circuit configurations schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 5 is the particular circuit configurations schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 6 is the particular circuit configurations schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 7 is the particular circuit configurations schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 8 is the particular circuit configurations schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention；
Fig. 9 is the driver' s timing figure of the pixel-driving circuit of structure shown in Fig. 1 to Fig. 6；
Figure 10 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention；
Figure 11 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.It is same or similar in this specification
Drawing reference numeral represent the same or similar structure, element or process.It should be noted that in the absence of conflict, this Shen
Please in embodiment and embodiment in feature can be combined with each other.
It include drive module, Data write. module, memory module the embodiment of the invention provides a kind of pixel-driving circuit
And threshold value compensation module, drive module are used to provide driving current, organic light-emitting structure response driving electricity to organic light-emitting structure
Stream shines, and drive module includes driving transistor, and Data write. module is used to that data-signal to be written in data write phase and drives
The control terminal of dynamic model block, memory module is for maintaining the control terminal of drive module in the current potential of light emitting phase, threshold value compensation module
For carrying out initialization and grabbing in data write phase to drive in current potential of the initial phase to the control terminal of drive module
For the threshold voltage of transistor to the control terminal of drive module, the thin film transistor (TFT) for constituting threshold value compensation module is the oxygen of multi-gate structure
Compound thin film transistor (TFT).
Organic light-emitting display device has generally comprised several pixels, and each pixel includes pixel-driving circuit and organic hair
Photo structure, pixel-driving circuit provide driving current to organic light-emitting structure, and organic light-emitting structure response pixel-driving circuit mentions
The driving current of confession shines, and organic light-emitting display device realizes display.It include driving transistor in pixel-driving circuit, driving is brilliant
Body pipe generates the luminous driving current of driving organic light-emitting structure, i.e. the light emission luminance of organic light-emitting structure depends on driving crystal
The driving current that pipe generates, and the driving current for driving transistor to generate is directly related with the driving grid potential of transistor.
Currently, pixel-driving circuit in the process of work, drives the grid of transistor, there are electrical leakage problems, drive transistor gate
Leakage current is bigger, and driving transistor maintains the time of grid potential shorter, and the driving frequency of corresponding driving IC is bigger, causes to drive
Dynamic IC power consumption is higher, and then causes display device power consumption higher, while being also unable to satisfy the requirement of small driving frequency, is unfavorable for pair
Pixel-driving circuit carries out the operation of more refreshing frequencys, different to the operating time of pixel-driving circuit under different refreshing frequencys
Storage information preservation is insufficient in memory module when also resulting in the switching of multiple refreshing frequencys in pixel-driving circuit, and then causes
There is the problems such as display flashing when multiple refreshing frequencys switch.In addition, the electric leakage of the grid of driving transistor to drive transistor
Grid potential it is unstable so that driving transistor switch state it is unstable, the fluorescent lifetime of organic light-emitting structure
Length is also just unstable, influences the display effect of display device.
It includes drive module, Data write. module, memory module and threshold value that pixel-driving circuit, which is arranged, in the embodiment of the present invention
Compensating module, drive module are used to provide driving current to organic light-emitting structure, and organic light-emitting structure responds driving current and shines,
Drive module includes driving transistor, and Data write. module is used for data-signal write driver module in data write phase
Control terminal, for maintaining the control terminal of drive module in the current potential of light emitting phase, threshold value compensation module is used for first memory module
Stage beginning carries out initialization to the current potential of the control terminal of drive module and grabs driving transistor in data write phase
For threshold voltage to the control terminal of drive module, the thin film transistor (TFT) for constituting threshold value compensation module is the sull of multi-gate structure
Transistor utilizes the sull crystal of multi-gate structure while the normal driving function of realizing pixel-driving circuit
The threshold value compensation module that pipe is constituted effectively reduces the leakage current of light emitting phase threshold value compensation module generation, improves drive module
Control terminal electric leakage the problem of, reduce display device power consumption, improve the stability of the control terminal voltage of drive module, favorably
In the operation for carrying out more refreshing frequencys to pixel-driving circuit, there is display flashing lamp when avoiding the switching of more refreshing frequencys and ask
Topic, optimizes the display effect of display device.
It is core of the invention thought above, following will be combined with the drawings in the embodiments of the present invention, to the embodiment of the present invention
In technical solution be clearly and completely described.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Under the premise of making creative work, every other embodiment obtained be shall fall within the protection scope of the present invention.
Fig. 1 is a kind of structural schematic diagram of pixel-driving circuit provided in an embodiment of the present invention, and Fig. 2 is the embodiment of the present invention
A kind of particular circuit configurations schematic diagram of the pixel-driving circuit provided.Pixel-driving circuit includes driving combined with Figure 1 and Figure 2,
Module 1, Data write. module 2, memory module 3 and threshold value compensation module 4, drive module 1 are used to provide to organic light-emitting structure A
Driving current, organic light-emitting structure A respond driving current and shine, and drive module 1 includes driving transistor T1, Data write. module
2 in data write phase, by the control terminal a1 of data-signal write driver module 1, memory module 3 to be for maintaining driving mould
The control terminal a1 of block 1 is in the current potential of light emitting phase, and threshold value compensation module 4 is for the control in initial phase to drive module 1
The current potential of end a1 carries out initialization and grabs in data write phase to drive the threshold voltage of transistor T1 to drive module 1
Control terminal a1, the thin film transistor (TFT) for constituting threshold value compensation module 4 is the oxide thin film transistor of multi-gate structure, and Fig. 2 is exemplary
Ground shows the oxide thin film transistor for constituting the thin film transistor (TFT) of threshold value compensation module 4 as double-gate structure.
Specifically, threshold value compensation module 4 is used in initial phase to the control terminal of drive module 1 combined with Figure 1 and Figure 2,
The current potential of a1 is initialized, i.e., resets to 1 control terminal a1 of drive module, and former frame is avoided to show the corresponding driving of picture
The control terminal a1 current potential of module 1 influences the control terminal a1 current potential that a later frame shows the corresponding drive module 1 of picture, optimizes display
The display effect of device.In addition, threshold value compensation module 4 is extremely driven in the threshold voltage that data write phase grabs driving transistor T1
The control terminal a1 of dynamic model block 1 advantageously allows to flow through the driving current Id and driving crystal of organic light-emitting structure A in light emitting phase
The threshold voltage vt h of pipe T1 is unrelated, effectively avoids showing non-uniform ask caused by driving transistor T1 threshold voltage vt h drift
Topic.
In addition, pixel-driving circuit enters after light emitting phase, threshold value compensation module 4 is turned off, the production of threshold value compensation module 4
Raw leakage current directly affects the electric leakage degree of the control terminal a1 of drive module 1, the i.e. electricity of the control terminal a1 of influence drive module 1
The stability of position, the thin film transistor (TFT) that setting constitutes threshold value compensation module 4 is oxide thin film transistor, such as structure can be set
Channel material at the thin film transistor (TFT) of threshold value compensation module 4 is IGZO (indium gallium zinc oxide), and oxide thin film transistor exists
The leakage current generated when shutdown is smaller, such as relative to LTPS (low temperature polycrystalline silicon) thin film transistor (TFT) generallyd use at present,
The leakage current generated when off is smaller, in this way, utilizing oxygen while the normal driving function of realizing pixel-driving circuit
The threshold value compensation module 4 that compound thin film transistor (TFT) is constituted effectively reduces the leakage current of the generation of light emitting phase threshold value compensation module 4,
The problem of improving the control terminal a1 electric leakage of drive module 1, display device power consumption is reduced, the control of drive module 1 is improved
The stability for holding a1 voltage, is conducive to the operation that more refreshing frequencys are carried out to pixel-driving circuit, and then optimize display device
Display effect.
In addition, LTPS thin film transistor (TFT) is related to changing the technique for polysilicon, channel by amorphous silicon during production
The uniformity of material is poor, influences the switching characteristic of LTPS thin film transistor (TFT), the channel material of oxide thin film transistor it is equal
Even property is preferable, and the thin film transistor (TFT) that setting constitutes threshold value compensation module 4 is oxide thin film transistor, is conducive to optimize threshold value benefit
The switching characteristic of module 4 is repaid, and then optimizes the display effect of display device.In addition, setting constitutes the oxidation of threshold value compensation module 4
Object transistor is that the thin film transistor (TFT) of multi-gate structure is conducive to further decrease threshold relative to the thin film transistor (TFT) of single grid structure
The leakage current that value compensating module 4 generates when off reduces display device power consumption, improves the control terminal a1 voltage of drive module 1
Stability, optimize the display effect of display device.
Optionally, the first end a2 and the second of drive module 1 of threshold value compensation module 4 can be set combined with Figure 1 and Figure 2,
A3 electrical connection is held, the second end a3 of threshold value compensation module 4 is electrically connected with the control terminal a1 of drive module 1, and the first of drive module 1
End a2 is electrically connected with Data write. module 2.Specifically, it can control threshold compensation mould in initial phase combined with Figure 1 and Figure 2,
Block 4 is connected to realize that the initialization to 1 control terminal a1 current potential of drive module can control threshold compensation in data write phase
Threshold voltage of the conducting of module 4 to realize crawl driving transistor controls Data write. module to the control terminal a1 of drive module 1
To realize mould is written in the control terminal a1 of data-signal write driver module 1, the first end a2 and data of drive module 1 by 2 conductings
Block 2 is electrically connected, and threshold compensation is arranged as shown in path L1 in Fig. 2 in the path of the control terminal a1 of data-signal write driver module 1
The first end a2 of module 4 is electrically connected with the second end a3 of drive module 1, the second end a3 and drive module 1 of threshold value compensation module 4
Control terminal a1 electrical connection, be conducive to realize 1 control terminal a1 current potential of drive module is initialized while so that sending out
The driving current Id that photophase flows through organic light-emitting structure A is unrelated with the driving threshold voltage vt h of transistor T1, effectively avoids driving
The non-uniform problem of display caused by dynamic transistor T1 threshold voltage vt h drift.
Fig. 3 is the structural schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention, and Fig. 4 is that the present invention is implemented
The particular circuit configurations schematic diagram for another pixel-driving circuit that example provides.With the pixel driver electricity of structure shown in Fig. 1 and Fig. 2
Unlike road, the first end a2 and driving mould of the pixel-driving circuit setting threshold value compensation module 4 of structure shown in Fig. 3 and Fig. 4
The first end a2 of block 1 is electrically connected, and the second end a3 of threshold value compensation module 4 is electrically connected with the control terminal a1 of drive module 1, drives mould
The second end a3 of block 1 is electrically connected with Data write. module 2.It specifically,, equally can be in initial phase in conjunction with Fig. 3 and Fig. 4
Control threshold compensating module 4 is connected to realize the initialization to 1 control terminal a1 current potential of drive module, in data write phase,
It can control the conducting of threshold value compensation module 4 and grab the control terminal a1 for driving the threshold voltage of transistor to drive module 1 to realize,
The control conducting of Data write. module 2 is to realize the control terminal a1 of data-signal write driver module 1, the second of drive module 1
End a3 is electrically connected with Data write. module 2, path L2 in the path of the control terminal a1 of data-signal write driver module 1 such as Fig. 4
Shown, the first end a2 of setting threshold value compensation module 4 is electrically connected with the first end a2 of drive module 1, and the of threshold value compensation module 4
Two end a3 are electrically connected with the control terminal a1 of drive module 1, are carried out initially being advantageously implemented to 1 control terminal a1 current potential of drive module
While change, so that flowing through the threshold voltage of the driving current Id and driving transistor T1 of organic light-emitting structure A in light emitting phase
Vth is unrelated, effectively avoids the non-uniform problem of display caused by driving transistor T1 threshold voltage vt h drift.
Optionally, in conjunction with Fig. 1 to Fig. 4, it further includes the first initialization module 5 that pixel-driving circuit, which can be set, at the beginning of first
Beginningization module 5 constitutes the first initialization for initializing in current potential of the initial phase to the control terminal a1 of drive module 1
The thin film transistor (TFT) of module 5 is oxide thin film transistor.Specifically, it in conjunction with Fig. 1 to Fig. 4, can be controlled in initial phase
First initialization module 5 is both turned on to realize to the initial of the current potential of the control terminal a1 of drive module 1 with threshold value compensation module 4
Change, former frame is avoided to show that the control terminal a1 current potential of the corresponding drive module 1 of picture influences a later frame and shows the corresponding drive of picture
The control terminal a1 current potential of dynamic model block 1, optimizes the display effect of display device.In addition, the first initialization module 5 is in initial phase
The current potential of the control terminal a1 of drive module 1 is initialized, pixel-driving circuit enters data write phase and luminous rank
Duan Hou, the shutdown of the first initialization module 5, the leakage current that the first initialization module 5 generates directly affect the control terminal of drive module 1
The electric leakage degree of a1, the i.e. stability of the current potential of the control terminal a1 of influence drive module 1.
The thin film transistor (TFT) that the first initialization module 5 of composition is arranged is oxide thin film transistor, such as structure can be set
Channel material at the thin film transistor (TFT) of the first initialization module 5 is IGZO (indium gallium zinc oxide), oxide thin film transistor
The leakage current generated when off is smaller, in this way, utilizing oxygen while the normal driving function of realizing pixel-driving circuit
Compound thin film transistor (TFT) constitutes the first initialization module 5 and effectively reduces data write phase and the initialization mould of light emitting phase first
The leakage current that block 5 generates improves the problem of 1 control terminal a1 of drive module leaks electricity, reduces display device power consumption, improve drive
The stability of the control terminal a1 voltage of dynamic model block 1, is conducive to the operation that more refreshing frequencys are carried out to pixel-driving circuit, Jin Eryou
The display effect of display device is changed.Likewise, the uniformity of the channel material of oxide thin film transistor is preferable, setting is constituted
The thin film transistor (TFT) of first initialization module 5 is oxide thin film transistor, is conducive to the switch for optimizing the first initialization module 5
Characteristic, and then optimize the display effect of display device.
Fig. 5 is the particular circuit configurations schematic diagram of another pixel-driving circuit provided in an embodiment of the present invention, and Fig. 6 is this
The pixel of structure shown in the particular circuit configurations schematic diagram for another pixel-driving circuit that inventive embodiments provide, Fig. 5 and Fig. 2
Driving circuit is different, and composition the first initialization mould can be set unlike the pixel-driving circuit of structure shown in Fig. 4 in Fig. 6
The thin film transistor (TFT) of block 5 is the oxide thin film transistor of multi-gate structure, and it is initial that composition first is illustratively arranged in Fig. 5 and Fig. 6
The thin film transistor (TFT) for changing module 5 is the oxide thin film transistor of double-gate structure.Specifically, setting constitutes the first initialization module
5 oxide transistor is the thin film transistor (TFT) of multi-gate structure, is conducive to further decrease the first initialization module 5 when off
The leakage current of generation improves the stability of the control terminal a1 voltage of drive module 1, optimizes the display effect of display device.
Optionally, in conjunction with Fig. 1 to Fig. 6, the first end a2 incoming reference signal of the first initialization module 5 can be set, the
The second end a3 of one initialization module 5 is electrically connected with the first end a2 of threshold value compensation module 4, so that reference signal to first
Control terminal a1 of the initialization module 5 to threshold value compensation module 4 to drive module 1 forms entire branch, to realize in initialization rank
Section initializes the current potential of the control terminal a1 of drive module 1.
Optionally, in conjunction with Fig. 1 to Fig. 4, pixel-driving circuit can also include the second initialization module 6, the second initialization
It is initial to constitute second for initializing in current potential of the initial phase to the first electrode A1 of organic light-emitting structure A for module 6
The thin film transistor (TFT) for changing module 6 is oxide thin film transistor.It specifically, can be in initial phase control in conjunction with Fig. 1 to Fig. 4
The conducting of the second initialization module 6 is made to realize the initialization of the current potential to the first electrode A1 of organic light-emitting structure A, is avoided previous
Frame shows that the first electrode A1 current potential of the corresponding organic light-emitting structure A of picture influences a later frame and shows the corresponding organic light emission of picture
The first electrode A1 current potential of structure A, optimizes the display effect of display device.In addition, the second initialization module 6 is in initialization rank
Section initializes the current potential of the first electrode A1 of organic light-emitting structure A, and pixel-driving circuit enters after light emitting phase, the
The shutdown of two initialization modules 6, the leakage current that the second initialization module 6 generates directly affect the first electrode of organic light-emitting structure A
The electric leakage degree of A1, the i.e. stability of the current potential of the first electrode A1 of influence organic light-emitting structure A.
The thin film transistor (TFT) that the second initialization module 6 of composition is arranged is oxide thin film transistor, such as structure can be set
Channel material at the thin film transistor (TFT) of the second initialization module 6 is IGZO, what oxide thin film transistor generated when off
Leakage current is smaller, in this way, utilizing oxide thin film transistor while the normal driving function of realizing pixel-driving circuit
The leakage current that the second initialization module 6 effectively reduces the generation of the second initialization module of light emitting phase 6 is constituted, luminous rank is improved
The problem of first electrode A1 electric leakage of section organic light-emitting structure A, improve the steady of the first electrode A1 voltage of organic light-emitting structure A
It is qualitative, and then optimize the display effect of display device.Likewise, the uniformity of the channel material of oxide thin film transistor compared with
Good, the thin film transistor (TFT) that setting constitutes the second initialization module 6 is oxide thin film transistor, is conducive to the second initialization of optimization
The switching characteristic of module 6, and then optimize the display effect of display device.
Optionally, in conjunction with Fig. 1, Fig. 3 and Fig. 5 and Fig. 6, the film crystal for constituting the second initialization module 6 can be set
Pipe is the oxide thin film transistor of multi-gate structure, and the film for constituting the second initialization module 6 is illustratively arranged in Fig. 5 and Fig. 6
Transistor is the oxide thin film transistor of double-gate structure, is conducive to further decrease the second initialization module 6 and produces when off
Raw leakage current improves the stability of the first electrode A1 voltage of organic light-emitting structure A, optimizes the display effect of display device.
Optionally, in conjunction with Fig. 1 to Fig. 6, the thin film transistor (TFT) for constituting the first initialization module 5 is sull crystal
Pipe, the thin film transistor (TFT) for constituting the second initialization module 6 is oxide thin film transistor, and the first initialization module 5 can be set
Control terminal a1 be electrically connected with the control terminal a1 of the second initialization module 6, be arranged threshold value initialization module control terminal a1 not with
The control terminal a1 of the control terminal a1 of first initialization module 5 and the second initialization module 6 electrical connection, such as the first initialization of setting
The control terminal a1 of the control terminal a1 of module 5 and the second initialization module 6 accesses scanning signal S1, the control of threshold value initialization module
End a1 processed accesses scanning signal S3.
Specifically, in conjunction with Fig. 1 to Fig. 6, the first initialization module 5, the second initialization module 6 and threshold value can be set and mend
Module 4 is repaid to be connected in initial phase to realize first to the control terminal a1 current potential of drive module 1 and organic light-emitting structure A
The initialization of 1 current potential of electrode A controls the first initialization module 5 in data write phase and the second initialization module 6 turns off, threshold
It is worth compensating module 4 to be connected, to realize the crawl of the write-in of data-signal and the threshold voltage of driving transistor, constitutes at the beginning of first
The thin film transistor (TFT) of beginningization module 5, the second initialization module 6 and threshold value compensation module 4 is oxide thin film transistor, if
The control terminal a1 for setting the first initialization module 5 is electrically connected with the control terminal a1 of the second initialization module 6, threshold value initialization module
Control terminal a1 is not electrically connected with the control terminal a1 of the control terminal a1 of the first initialization module 5 and the second initialization module 6, is being realized
While above-mentioned driving process, the quantity for the scan signal line being electrically connected with pixel-driving circuit is advantageously reduced, and then reduce
The quantity of display device non-display area scanning circuit, is conducive to the realization of display device narrow frame.
Optionally, the thin film transistor (TFT) for constituting the first initialization module 5 is oxide thin film transistor, and it is initial to constitute second
The thin film transistor (TFT) for changing module 6 is oxide thin film transistor, can also be with for the pixel-driving circuit of the structure shown in Fig. 5
The control terminal a1 that the second initialization module 6 is arranged is electrically connected with the control terminal a1 of threshold value compensation module 4, the first initialization module 5
Control terminal a1 be not electrically connected with the control terminal a1 of the control terminal a1 of the second initialization module 6 and threshold value compensation module 4, such as Fig. 7
It is shown, equally for the pixel-driving circuit of the structure shown in Fig. 6, the control terminal a1 of the second initialization module 6 also can be set
Be electrically connected with the control terminal a1 of threshold value compensation module 4, the control terminal a1 of the first initialization module 5 not with the second initialization module 6
Control terminal a1 and threshold value compensation module 4 control terminal a1 electrical connection, as shown in Figure 8.
In conjunction with Fig. 7 and Fig. 8, the control terminal a1 of the second initialization module 6 and the control terminal a1 electricity of threshold value compensation module 4 are set
Connection, the control terminal a1 of the first initialization module 5 not with the control terminal a1 of the second initialization module 6 and threshold value compensation module 4
Control terminal a1 electrical connection, such as the control terminal a1 of the second initialization module 6 and the control terminal a1 of threshold value compensation module 4 can be set
Scanning signal S3 is accessed, the control terminal a1 of the first initialization module 5 accesses scanning signal S1.
Specifically, in conjunction with Fig. 7 and Fig. 8, the first initialization module 5, the second initialization module 6 and threshold value can be set and mend
Module 4 is repaid to be connected in initial phase to realize first to the control terminal a1 current potential of drive module 1 and organic light-emitting structure A
The initialization of 1 current potential of electrode A controls the shutdown of the first initialization module 5, threshold value compensation module 4 and second in data write phase
Initialization module 6 is connected, and the write-in of data-signal equally may be implemented and drive the crawl of the threshold voltage of transistor, constitute
The thin film transistor (TFT) of first initialization module 5, the second initialization module 6 and threshold value compensation module 4 is sull crystalline substance
The control terminal a1 of body pipe, the second initialization module 6 of setting is electrically connected with the control terminal a1 of threshold value compensation module 4, the first initialization
The control terminal a1 of module 5 is not electrically connected with the control terminal a1 of the control terminal a1 of the second initialization module 6 and threshold value compensation module 4,
While stating driving process in realization, the quantity for the scan signal line being electrically connected with pixel-driving circuit is advantageously reduced, into
And the quantity of display device non-display area scanning circuit is reduced, be conducive to the realization of display device narrow frame.
Optionally, in conjunction with Fig. 1 to Fig. 8, pixel-driving circuit can also include at least one light emitting control module 7, and Fig. 1 is extremely
Illustratively device pixel-driving circuit includes two light emitting control modules 7 to Fig. 8, i.e. the first light emitting control module 71 and the second hair
Photocontrol module 72, light emitting control module 7 are used to control organic light-emitting structure A before light emitting phase and not shine.Specifically, it ties
Fig. 1 to Fig. 8 is closed, light emitting control module 7, i.e. the first light emitting control module 71 and the second light emitting control module 72 are used in luminous rank
Control organic light-emitting structure A does not shine before section, i.e., in initial phase and data write phase, light emitting control module 7, i.e., the
One light emitting control module 71 and the second light emitting control module 72 are in off state, so that drive module 1 is to organic light emission knot
Structure A can not form current path, i.e., the driving current Id that drive module 1 generates can not be transmitted to organic light-emitting structure A, You Jifa
Photo structure A does not shine, and effectively prevents organic light-emitting structure A the non-luminescent stage light leakage the problem of.
Fig. 9 is the driver' s timing figure of the pixel-driving circuit of structure shown in Fig. 1 to Fig. 6.Illustratively, driving can be set
Transistor T1, data writing transistor T2, the first light emitting control transistor T7 and the second light emitting control transistor T8 are that p-type is thin
Film transistor, such as can be LTPS thin film transistor (TFT), the first initialization transistor T5 of setting, the second initialization transistor T6 and
Threshold compensation transistor T4 is N-type TFT, i.e. oxide thin film transistor, below with reference to Fig. 9 to shown in Fig. 1 and Fig. 6
The operating principle of the pixel-driving circuit of structure is specifically described:
In t1 (initialization) period, the first initialization transistor T5, the second initialization transistor T6 and threshold compensation are brilliant
It is connected between the corresponding first pole b2 of body pipe T4 and the second pole b3, between the first pole b2 and the second pole b3 of remaining transistor
Shutdown.
In this case, reference signal Vref is transmitted by the first initialization transistor T5 and threshold compensation transistor T4
To the grid b1 of driving transistor T1, the grid b1 of driving transistor T1 is referenced signal initialization.Likewise, reference signal
Vref is transmitted to the first electrode A1 of organic light-emitting structure A by the second initialization transistor T6, and the first of organic light-emitting structure A
Electrode A 1 is referenced signal initialization.
In t2 (data write-in) period, transistor T1, data writing transistor T2 and threshold compensation transistor T4 are driven
It is connected between corresponding first pole b2 and the second pole b3, is turned off between the first pole b2 and the second pole b3 of remaining transistor.
In this case, data writing transistor T2 is by the grid b1 of data-signal write driver transistor T1, data
The write paths of signal as shown in Figure 1, Figure 2 and the path L1 in Fig. 5, or as shown in the path L2 in Fig. 3, Fig. 4 and Fig. 6, drive
Transistor T1 is equivalent at diode and forward bias, the voltage Vdata of data-signal DATA subtract by threshold compensation transistor T4
Remove the absolute value of the threshold voltage vt h of driving transistor T1 | Vth | the offset voltage obtained afterwards is applied to driving transistor T1
Grid b1, i.e., threshold value compensation module 4 data write phase by comprising drive transistor T1 threshold voltage vt h information compensation
The control terminal a1 of signal write driver module 1, the voltage value on the second end e2 of storage capacitance C1 is equal to offset voltage at this time, deposits
Storage holds the voltage value Vdd that the voltage value on the first end e1 of C1 is equal to the first power supply signal VDD, the first end of storage capacitance C1
The corresponding charge storage of voltage difference between e1 and second end e2 is in storage capacitance C1.
In t3 (luminous) period, transistor T1, the first light emitting control transistor T7 and the second light emitting control crystal are driven
It is connected between the corresponding first pole b2 of pipe T8 and the second pole b3, is closed between the first pole b2 and the second pole b3 of remaining transistor
It is disconnected.
In this case, the first power supply signal VDD is transmitted to driving transistor by the first light emitting control transistor T7
The first pole b2 of T1 drives the voltage difference between the grid b1 voltage of transistor T1 and the voltage value Vdd of the first power supply signal VDD
The driving current Id of generation flows to organic light-emitting structure A by the second light emitting control transistor T8, and organic light-emitting structure A response is driven
Streaming current Id shines.
In the t3 period, since storage capacitance C1 is electrically connected with the grid b1 of driving transistor T1, and storage capacitance C1 energy
Enough grid b1 for maintaining driving transistor T1 in light emitting phase, the i.e. voltage of t3 period, drive the grid b1 of transistor T1 with
Voltage Vgs between source electrode (the first pole b2) is kept or is kept substantially (Vdata+Vth)-Vdd, root by storage capacitance C1
According to the corresponding relationship of voltage difference between the driving current Id and grid b1 and source electrode (the first pole b2) of driving transistor T1, driving is brilliant
Voltage Vgs between the driving current Id and grid b1 and source electrode (the first pole b2) of body pipe T1 subtracts the threshold value of driving transistor T1
Voltage Vth square i.e. (Vdata-Vdd)2It is proportional, therefore drive the driving current Id and driving transistor T1 of transistor T1
Threshold voltage vt h it is unrelated, effectively prevent display caused by driving transistor T1 threshold voltage vt h drift and non-uniform ask
Topic.
In addition, since threshold compensation transistor T4 is oxide thin film transistor, as N-type TFT, the first hair
Photocontrol transistor T7 and the second light emitting control transistor T8 can be set to P-type TFT, and threshold compensation crystal
Pipe T4 is connected in t1 period and t2 period, turns off in the t3 period, and the first light emitting control transistor T7 and second, which shines, to be controlled
Transistor T8 processed is turned off in t1 period and t2 period, is connected in the t3 period, therefore threshold compensation transistor can be set
The grid b1 of T4, the first light emitting control transistor T7 and the second light emitting control transistor T8 are electrically connected same scan signal line,
I.e. signal S3 is identical as the waveform of signal EM, advantageously reduces the quantity for the scan signal line being electrically connected with pixel-driving circuit,
And then the quantity of display device non-display area scanning circuit is reduced, be conducive to the realization of display device narrow frame.
Fig. 9 can also serve as the driver' s timing figure of the pixel-driving circuit of structure shown in Fig. 7 and Fig. 8, with Fig. 1 to Fig. 6
Unlike the above-mentioned working principle of the pixel-driving circuit of shown structure, the second initialization transistor T6 is in t2, (data are write
Enter) it is connected between period its corresponding first pole b2 and the second pole b3, it can likewise ensure that in initial phase reference signal
Vref is transmitted to the first electrode A1 of organic light-emitting structure A by the second initialization transistor T6, initial in light emitting phase second
Change transistor T6 shutdown, the second initialization transistor T6 of setting is oxide thin film transistor to reduce the second initialization transistor
The leakage current that T6 is generated when off improves the stability of the first electrode A1 voltage of organic light-emitting structure A, optimizes display device
Display effect.
Illustratively, Fig. 2 and Fig. 4 to Fig. 8 is controlled with driving transistor T1, data writing transistor T2, first to shine
Driving transistor also can be set to be illustrated for P-type transistor in transistor T7 processed and the second light emitting control transistor T8
T1, data writing transistor T2, the first light emitting control transistor T7 and the second light emitting control transistor T8 are N-type transistor, N-type
Driving transistor T1, data writing transistor T2, the first light emitting control transistor T7 and the second light emitting control transistor T8 it is brilliant
Body pipe is also possible to LTPS transistor, driving transistor T1, data writing transistor T2, the first light emitting control transistor of N-type
T7 and the corresponding driver' s timing of the second light emitting control transistor T8 and these transistors are in the corresponding driver' s timing of P-type transistor
Level height it is reversed.
It should be noted that the embodiment of the present invention is to the quantity of transistor in pixel-driving circuit and the number of capacity cell
Amount is not especially limited, can be according to specific requirements to the quantity of transistor in pixel-driving circuit and the quantity of capacity cell
It is selected.
One kind that the embodiment of the present invention also provides has display device, and Figure 10 is a kind of display dress provided in an embodiment of the present invention
The structural schematic diagram set.As shown in Figure 10, including the pixel-driving circuit in above-described embodiment, therefore the embodiment of the present invention provides
Display device also have beneficial effect described in above-described embodiment, details are not described herein again.Illustratively, display device can
To be organic light-emitting display device, display device can also include multi-strip scanning signal wire D12, a plurality of data signal line D13, grid
Pole drive module D121, source drive module D131, drive control module D101 and power supply module D102, pixel driver electricity
Road D1 is set in the space of scan signal line D12 and data signal line D13 formation arranged in a crossed manner, and grid electrode drive module D121 is rung
The turntable driving control signal for answering drive control module D101 to generate, it is electric to corresponding pixel driver by surface sweeping signal wire D12
Road inputs scanning signal, effect of the pixel-driving circuit D1 in the scanning signal for the scan signal line D12 input being electrically connected
Under, it is connected to the data signal line D13 for electrical connection of being corresponding to it, source electrode drive circuit D131 responds drive control module D101 and generates
Data drive control signal, by data signal line D13 to corresponding pixel-driving circuit D1 input data signal, power supply is supplied
The first power supply signal VDD is provided to pixel-driving circuit to module 102 and second source signal VSS, display device are realized according to this
Display function.Illustratively, display device can be organic light-emitting display device, and display device can be mobile phone, such as Figure 11 institute
Show, or can be the electronic equipments such as computer or wearable device, the embodiment of the present invention does not make the concrete form of display device
It limits.
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 present invention is not limited to specific embodiments here, be able to carry out for a person skilled in the art it is various it is apparent variation, again
Adjustment and substitution are without departing from protection scope of the present invention.Therefore, although by above embodiments to the present invention carried out compared with
For detailed description, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, can be with
Including 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-driving circuit characterized by comprising
Drive module, the drive module are used to provide driving current, the organic light-emitting structure response to organic light-emitting structure
The driving current shines, and the drive module includes driving transistor；
Data write. module, the Data write. module are used to that the drive module to be written in data-signal in data write phase
Control terminal；
Memory module, the memory module is for maintaining the control terminal of the drive module in the current potential of light emitting phase；
Threshold value compensation module, the threshold value compensation module are used in initial phase to the current potential of the control terminal of the drive module
It carries out initialization and grabs the threshold voltage of the driving transistor to the control of the drive module in data write phase
End；Wherein, the thin film transistor (TFT) for constituting the threshold value compensation module is the oxide thin film transistor of multi-gate structure.
2. pixel-driving circuit according to claim 1, which is characterized in that the first end of the threshold value compensation module and institute
The second end electrical connection of drive module is stated, the second end of the threshold value compensation module and the control terminal of the drive module are electrically connected
It connects, the first end of the drive module is electrically connected with the Data write. module.
3. pixel-driving circuit according to claim 1, which is characterized in that the first end of the threshold value compensation module and institute
The first end electrical connection of drive module is stated, the second end of the threshold value compensation module and the control terminal of the drive module are electrically connected
It connects, the second end of the drive module is electrically connected with the Data write. module.
4. pixel-driving circuit according to claim 1-3, which is characterized in that further include:
First initialization module, first initialization module is for the control in the initial phase to the drive module
The current potential at end is initialized, and the thin film transistor (TFT) for constituting first initialization module is oxide thin film transistor.
5. pixel-driving circuit according to claim 4, which is characterized in that constitute the film of first initialization module
Transistor is the oxide thin film transistor of multi-gate structure.
6. pixel-driving circuit according to claim 4, which is characterized in that the first termination of first initialization module
Enter reference signal, second end is electrically connected with the first end of the threshold value compensation module.
7. pixel-driving circuit according to claim 1-3, which is characterized in that further include:
Second initialization module, second initialization module are used in the initial phase to the organic light-emitting structure
The current potential of first electrode is initialized, and the thin film transistor (TFT) for constituting second initialization module is sull crystal
Pipe.
8. pixel-driving circuit according to claim 7, which is characterized in that constitute the film of second initialization module
Transistor is the oxide thin film transistor of multi-gate structure.
9. pixel-driving circuit according to claim 1-3, which is characterized in that further include:
First initialization module, first initialization module is for the control in the initial phase to the drive module
The current potential at end is initialized, and the thin film transistor (TFT) for constituting first initialization module is oxide thin film transistor；
Second initialization module, second initialization module are used in the initial phase to the organic light-emitting structure
The current potential of first electrode is initialized, and the thin film transistor (TFT) for constituting second initialization module is sull crystal
Pipe；
The control terminal of first initialization module is electrically connected or described second with the control terminal of second initialization module
The control terminal of initialization module is electrically connected with the control terminal of the threshold value compensation module.
10. a kind of display device, which is characterized in that including such as described in any item pixel-driving circuits of claim 1-9.
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Application publication date: 20190910 |