CN109637443A - Pixel compensation circuit and driving method, display device - Google Patents
Pixel compensation circuit and driving method, display device Download PDFInfo
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- CN109637443A CN109637443A CN201910023739.7A CN201910023739A CN109637443A CN 109637443 A CN109637443 A CN 109637443A CN 201910023739 A CN201910023739 A CN 201910023739A CN 109637443 A CN109637443 A CN 109637443A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention discloses a kind of pixel compensation circuit and driving method, display device, is related to field of display technology, which includes: Data write. module, drive control module, initialization module, compensating module and drive module；The second end of Data write. module and the first end of drive control module connect, and the second end of drive control module and the control terminal of drive module connect；The first end of compensating module is connected for receiving DC voltage, the second end of compensating module and the first end of drive module, and the second end of drive module is connect with the first end of pixel light emission unit, and the second end of pixel light emission unit is connect with reference data voltage end；The second end of compensating module is also connect with the first end of drive control module, and the second end of drive control module is also connect with the first end of initialization module, and the second end of initialization module is also connect with reference data voltage end.Influence of the DC voltage to pixel driving current can be eliminated using the embodiment of the present invention.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of pixel compensation circuits and driving method, display device.
Background technique
Stretching display is one of important front edge direction of next-generation display technology, peripheral wiring such as Fig. 1 of stretchable screen body
Shown, conducting wire is arranged into bending to match the draftability of its structure.Currently, generally by peripheral (non-display area) traverse design
It is wider, to reduce the single DC voltage that drives in pixel-driving circuit by lesser resistance to the shadow of pixel driving current
It rings, still, the design of wide wire bonding bending cabling will cause screen body width excessive, not meet narrow frame design.
Summary of the invention
The embodiment of the invention provides a kind of pixel compensation circuit and driving methods, display device, can eliminate direct current
The influence to pixel driving current is pressed, so as to which under the premise of not influencing pixel driving current, peripheral conducting wire is done more
Carefully, narrow frame design is realized.
In a first aspect, the embodiment of the present invention provides a kind of pixel compensation circuit, which includes: data write-in
Module, drive control module, initialization module, compensating module and drive module；
Wherein, the first end of Data write. module voltage for receiving data, the second end and driving of Data write. module
The first end of control module connects, and the second end of drive control module and the control terminal of drive module connect；
The first end of compensating module connects for receiving DC voltage, the second end of compensating module and the first end of drive module
It connects, the second end of drive module is connect with the first end of pixel light emission unit, the second end and reference data of pixel light emission unit
Voltage end connection；
The second end of compensating module is also connect with the first end of drive control module, the second end of drive control module also with
The first end of initialization module connects, and the second end of initialization module is also connect with reference data voltage end；
Data write. module is configured as the first end of data voltage write driver control module, and initialization module is matched
It is set to and provides reference data voltage for the second end of drive control module, compensating module is configured as driving using DC voltage compensation
The voltage of the second end of dynamic control module, and worked using compensated voltage control drive module.
In a kind of possible embodiment of first aspect, Data write. module includes the first transistor, first crystal
The first end of pipe voltage for receiving data, the second end of the first transistor respectively with the first end of drive control module and compensation
The second end of module connects.
In a kind of possible embodiment of first aspect, drive control module includes first capacitor, first capacitor
First end is connect with the second end of the second end of Data write. module and compensating module respectively, the second end of first capacitor respectively with
The control terminal of drive module is connected with the first end of initialization module.
In a kind of possible embodiment of first aspect, initialization module includes second transistor, second transistor
First end connect respectively with the control terminal of the second end of drive control module and drive module, the second end of second transistor with
The connection of reference data voltage end.
In a kind of possible embodiment of first aspect, compensating module includes third transistor, third transistor
First end for receiving DC voltage, the second end of third transistor respectively with the first end of drive control module and drive module
First end connection.
In a kind of possible embodiment of first aspect, drive module includes the 4th transistor, the 4th transistor
Control terminal is connect with the first end of the second end of drive control module and initialization module respectively, the first end point of the 4th transistor
It is not connect with the first end of the second end of compensating module and drive control module, the second end and pixel light emission list of the 4th transistor
The first end connection of member.
In a kind of possible embodiment of first aspect, the 4th transistor is P-type TFT, and p-type film is brilliant
The grid of body pipe is the control terminal of the 4th transistor, and the source electrode of P-type TFT is the first end of the 4th transistor, and p-type is thin
The drain electrode of film transistor is the second end of the 4th transistor.
Second aspect, the embodiment of the present invention provide a kind of driving method of pixel compensation circuit, are used for picture as described above
Plain driving circuit, the driving method include: to control Data write. module work according to the first level signal, and data voltage is written
The first end of drive control module；And initialization module work is controlled according to first control signal, it is the of drive control module
Two ends provide reference data voltage；Compensating module work is controlled according to second electrical level signal, compensates driving control using DC voltage
The voltage of the second end of molding block, and worked using compensated voltage control drive module.
In a kind of possible embodiment of second aspect, reference data voltage is less than 0V.
The third aspect, the embodiment of the present invention provide a kind of display device, which includes that pixel as described above is mended
Repay circuit.
In embodiments of the present invention, Data write. module is configured as the first of data voltage write driver control module
End, initialization module are configured as providing reference data voltage for the second end of drive control module, and compensating module is configured as
Using the voltage of the second end of DC voltage compensation drive control module, and drive module work is controlled using compensated voltage
Make.
Need to reduce DC voltage pair in single drive pixel-driving circuit by lesser resistance in the prior art
The influence of pixel driving current is compared, and the compensating module in the embodiment of the present invention is configured as utilizing DC voltage compensation driving control
The voltage of the second end of molding block, and worked using compensated voltage control drive module, thoroughly to eliminate DC voltage pair
The influence of pixel driving current, it is thinner so as to which under the premise of not influencing pixel driving current, peripheral conducting wire is done, it is real
Existing narrow frame design.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention wherein,
The same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 be the present embodiments relate to stretchable screen body peripheral wiring schematic diagram；
Fig. 2 is the structural schematic diagram for the pixel compensation circuit that one embodiment of the invention provides；
Fig. 3 be another embodiment of the present invention provides pixel compensation circuit structural schematic diagram；
Fig. 4 is the flow diagram of the driving method of pixel compensation circuit provided in an embodiment of the present invention；
Fig. 5 is the timing control figure of pixel compensation circuit provided in an embodiment of the present invention.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.
The embodiment of the invention provides a kind of pixel compensation circuit and driving methods, display device, are implemented using the present invention
Technical solution in example, can eliminate influence of the DC voltage to pixel driving current, so as to not influence driving current
Under the premise of, peripheral conducting wire is done thinner, and then realizes narrow frame design.
Fig. 2 is the structural schematic diagram for the pixel compensation circuit that one embodiment of the invention provides, as shown in Fig. 2, pixel compensation
Circuit includes: Data write. module 101, drive control module 102, initialization module 103, compensating module 104 and drive module
105。
Wherein, the first end of Data write. module 101 voltage Vdata for receiving data, the of Data write. module 101
Two ends are connect with the first end of drive control module 102, the control of the second end and drive module 105 of drive control module 102
End connection.
The first end of compensating module 104 is for receiving DC voltage Vdd, the second end and drive module of compensating module 104
105 first end connection, the second end of drive module 105 are connect with the first end of pixel light emission unit 106, pixel light emission unit
106 second end is connect with reference data voltage end.
The second end of compensating module 104 is also connect with the first end of drive control module 102, drive control module 102
Second end is also connect with the first end of initialization module 103, and the second end of initialization module 103 also connects with reference data voltage end
It connects.
In embodiments of the present invention, Data write. module 101 is configured as data voltage Vdata write driver controlling mould
The first end of block 102, initialization module 103 are configured as by providing reference data electricity for the second end of drive control module 102
Vss is pressed, compensating module 104 is configured as the voltage of the second end using DC voltage Vdd compensation drive control module 102, and
It is worked using compensated voltage control drive module 105.
Need to reduce DC voltage Vdd in single drive pixel-driving circuit by lesser resistance in the prior art
Influence to pixel driving current is compared, and the compensating module 104 in the embodiment of the present invention is configured as mending using DC voltage Vdd
The voltage of the second end of drive control module 102 is repaid, and is worked using compensated voltage control drive module 105, with thorough
Influence of the DC voltage Vdd to pixel driving current is eliminated, it, will be outer so as under the premise of not influencing pixel driving current
It encloses conducting wire and does thinner, realization narrow frame design.
Fig. 3 be another embodiment of the present invention provides pixel compensation circuit structural schematic diagram, as shown in figure 3, data are write
Entering module 101, drive control module 102, initialization module 103, compensating module 104 and drive module 105 can be by first device
Part composition will be exemplified below above-mentioned Data write. module 101, drive control module 102, initialization module 103, compensation mould
The specific structure of block 104 and drive module 105.
In one example, Data write. module 101 includes the first transistor M1, and drive control module 102 includes first
Capacitor C1, initialization module 103 include second transistor M2, and compensating module 104 includes third transistor M3, drive module 105
Including the 4th transistor M4, pixel light emission unit be Organic Light Emitting Diode (Organic Light-Emitting Diode,
OLED)。
Wherein, the first end of the first transistor M1 for receiving data divide by voltage Vdata, the second end of the first transistor M1
It is not connect with the second end of the first end of first capacitor C1 and third transistor M3；The first end of first capacitor C1 is respectively with first
The second end of transistor M1 is connected with the second end of third transistor M3, the second end of first capacitor C1 respectively with the 4th transistor
The control terminal of M4 is connected with the first end of second transistor M2；The first end of second transistor M2 respectively with first capacitor C1
Two ends are connected with the control terminal of the 4th transistor M4, and the second end of second transistor M2 is connect with reference data voltage end；Third
The first end of transistor M3 for receiving DC voltage Vdd, the second end of third transistor M3 respectively with first capacitor C1 the
One end is connected with the first end of the 4th transistor M4；The control terminal of 4th transistor M4 respectively with the second end of first capacitor C1 and
The first end of second transistor M2 connects, the first end of the 4th transistor M4 respectively with the second end of third transistor M3 and first
The first end of capacitor C1 connects, and the second end of the 4th transistor M4 is connect with the first end of pixel light emission unit 106.
According to embodiments of the present invention, above-mentioned the first transistor M1, second transistor M2 and third transistor M3 substantially
Switching transistor, including N-type TFT and P-type TFT.The substantially driving transistor of 4th transistor M4, tool
Body is P-type TFT, and the grid G of P-type TFT is the control terminal of the 4th transistor M4, P-type TFT
Source S is the first end of the 4th transistor M4, and the drain D of P-type TFT is the second end of the 4th transistor M4.
Fig. 4 is the flow diagram of the driving method of pixel compensation circuit provided in an embodiment of the present invention, is used for institute as above
The pixel compensation circuit stated, as shown in figure 4, the driving method includes step 401 and step 402.
In step 401, Data write. module 101 is controlled according to the first level signal to work, data voltage Vdata is write
Enter the first end of drive control module 102；And initialization module 103 is controlled according to first control signal and is worked, it is drive control
The second end of module 102 provides reference data voltage Vss.
In step 402, compensating module 104 is controlled according to second electrical level signal to work, compensated and driven using DC voltage Vdd
The voltage of the second end of dynamic control module, and worked using compensated voltage control drive module 105.
Below using the first transistor M1, second transistor M2 and third transistor M3 as N-type TFT, the 4th crystal
Pipe M4 is the working principle of brief description pixel compensation circuit for P-type TFT.
Fig. 5 is the timing control figure of pixel compensation circuit provided in an embodiment of the present invention.
As shown in figure 5, in the t1 period, to the control terminal S1 input low level of the first transistor M1 and second transistor M2
Signal (0), to the control terminal S2 input high level signal (1) of third transistor M3.
Since N-type transistor is connected with low level (0), the characteristic of high level (1) shutdown, therefore, the in the t1 period
One transistor M1 conducting, second transistor M2 conducting, third transistor M3 shutdown.At this point, data voltage Vdata is written into first
The left pole plate of capacitor C1, reference data voltage Vss are written into the right pole plate of first capacitor C1, the left and right pole plate of first capacitor C1 it
Between voltage difference be denoted as: | Vdata-Vss |.
It is connected again due to P-type transistor with high level, the characteristic of low level shutdown, the grid voltage Vg of the 4th brilliant pipe M4
For Vss, Vss numerical value is smaller, in some instances it may even be possible to be negative value, belong to low level signal, therefore, the 4th crystalline substance pipe M4 is in the t1 period
Off state.
In the T2 period, to the control terminal S1 input high level signal (1) of the first transistor M1 and second transistor M2, to
The control terminal S2 input low level signal (0) of third transistor M3, so that the first transistor M1 shutdown, second transistor M2 are closed
Disconnected, third transistor M3 conducting, at this point, the source voltage Vs of the 4th transistor M4 is DC voltage Vdd, a left side of first capacitor C1
Polar plate voltage is raised to DC voltage Vdd.
According to capacitance characteristic, capacitor two sides voltage cannot be mutated, since the right plate charge of first capacitor C1 will not shift,
Therefore, the right polar plate voltage of first capacitor C1 can make between the left and right pole plate of first capacitor C1 with the synchronous lifting of its left polar plate voltage
Voltage difference be maintained at | Vdata-Vss |, that is to say, that the right polar plate voltage of first capacitor C1 also can be elevated (compensation) extremely
Vss+Vdd-Vdata, then the grid voltage Vg of the 4th transistor M4 becomes Vss+Vdd-Vdata at this time.
Since Vdd numerical value is larger, belong to high level signal, the 4th crystalline substance pipe M4 is connected in the t2 period, by the value of Vg and Vs
Substitute into formula (1) and formula (2):
Ids=λ (Vgs-Vth)2 (1)
Vgs=Vg-Vs (2)
It is available: Ids=λ (Vss+Vdd-Vdata-Vdd-Vth)2=λ (Vss-Vdata-Vth)2, Vdd is cancelled,
Eliminate influence of the DC voltage to pixel driving current Ids.
Wherein, Vgs is the grid and source voltage drop of the 4th transistor M4, and Vth is the channel surface between source electrode and drain electrode
Grid voltage when conducting channel is just induced, λ is coefficient.
As described above, the virtual voltage Vss of reference data voltage end can be according to the operative scenario of pixel light emission unit 106
And demand is set.Preferably, to guarantee that the 4th transistor M4 can be turned off within the t1 period, t2 is led in the period
Logical, Vss should be smaller value, it is preferable that Vss is less than mono- negative pressure of 0V, for example, -4V.
The embodiment of the present invention also provides a kind of display device, the pixel compensation circuit as described above.The display dress
Set to be computer, mobile phone, tablet computer etc..
It should be clear that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between the same or similar part may refer to each other, the highlights of each of the examples are it is different from other embodiments it
Place.For device embodiment, related place may refer to the declaratives of embodiment of the method.The invention is not limited to upper
Literary particular step described and shown in figure and structure.Those skilled in the art can understand spirit of the invention
Afterwards, it is variously modified, modification and addition, or the sequence between changing the step.Also, it for brevity, omits here
To the detailed description of known method technology.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, specific integrated circuit (ASIC), firmware appropriate, insert
Part, function card etc..When being realized with software mode, " machine readable media " may include capableing of appointing for storage or transmission information
What medium.The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM
(EROM), floppy disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..
The present invention can realize in other specific forms, without departing from its spirit and essential characteristics.For example, particular implementation
Algorithm described in example can be modified, and system architecture is without departing from essence spirit of the invention.Therefore, currently
Embodiment be all counted as being exemplary rather than in all respects it is limited, the scope of the present invention by appended claims rather than
Foregoing description definition, also, the meaning of claim and whole changes in the range of equivalent are fallen into all be included in
Among the scope of the present invention.
Claims (10)
1. a kind of pixel compensation circuit characterized by comprising Data write. module, drive control module, initialization module,
Compensating module and drive module；
Wherein, the first end of Data write. module voltage for receiving data, the second end of the Data write. module with
The first end of the drive control module connects, and the control terminal of the second end of the drive control module and the drive module connects
It connects；
The first end of the compensating module is for receiving DC voltage, the second end of the compensating module and the drive module
First end connection, the second end of the drive module are connect with the first end of pixel light emission unit, the pixel light emission unit
Second end is connect with reference data voltage end；
The second end of the compensating module is also connect with the first end of the drive control module, and the of the drive control module
Two ends are also connect with the first end of the initialization module, the second end of the initialization module also with the reference data voltage
End connection；
The Data write. module is configured as that the first end of the drive control module is written the data voltage into, described first
Beginningization module is configured as providing reference data voltage for the second end of the drive control module, and the compensating module is configured
For compensated using the DC voltage drive control module second end voltage, and using compensated voltage control institute
State drive module work.
2. pixel compensation circuit according to claim 1, which is characterized in that the Data write. module includes first crystal
Pipe, the first end of the first transistor for receiving the data voltage, the second end of the first transistor respectively with institute
The first end for stating drive control module is connected with the second end of the compensating module.
3. pixel compensation circuit according to claim 1, which is characterized in that the drive control module includes the first electricity
Hold, the first end of the first capacitor connects with the second end of the Data write. module and the second end of the compensating module respectively
It connects, the second end of the first capacitor connects with the control terminal of the drive module and the first end of the initialization module respectively
It connects.
4. pixel-driving circuit according to claim 1, which is characterized in that the initialization module includes the second crystal
Pipe, the first end of the second transistor control terminal with the second end of the drive control module and the drive module respectively
Connection, the second end of the second transistor are connect with the reference data voltage end.
5. pixel-driving circuit according to claim 1, which is characterized in that the compensating module includes third transistor,
The first end of the third transistor for receiving the DC voltage, the second end of the third transistor respectively with the drive
The first end of dynamic control module is connected with the first end of the drive module.
6. pixel-driving circuit according to claim 1, which is characterized in that the drive module includes the 4th transistor,
The control terminal of 4th transistor first end with the second end of the drive control module and the initialization module respectively
Connection, the first end of the 4th transistor respectively with the second end of the compensating module and the drive control module first
End connection, the second end of the 4th transistor are connect with the first end of the pixel light emission unit.
7. pixel-driving circuit according to claim 6, which is characterized in that the 4th transistor is p-type film crystal
Pipe, the grid of the P-type TFT are the control terminal of the 4th transistor, and the source electrode of the P-type TFT is
The first end of 4th transistor, the drain electrode of the P-type TFT are the second end of the 4th transistor.
8. a kind of driving method of pixel compensation circuit, which is characterized in that for such as the described in any item pixels of claim 1-7
Driving circuit, the driving method include:
The Data write. module work is controlled according to the first level signal, the drive control mould is written into the data voltage
The first end of block；And the initialization module is controlled according to the first control signal and is worked, it is the drive control module
Second end provides reference data voltage；
The compensating module work is controlled according to second electrical level signal, compensates the drive control module using the DC voltage
Second end voltage, and control the drive module using compensated voltage and work.
9. driving method according to claim 8, which is characterized in that the reference data voltage is less than 0V.
10. a kind of display device, which is characterized in that including the described in any item pixel compensation circuits of such as claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910023739.7A CN109637443A (en) | 2019-01-10 | 2019-01-10 | Pixel compensation circuit and driving method, display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910023739.7A CN109637443A (en) | 2019-01-10 | 2019-01-10 | Pixel compensation circuit and driving method, display device |
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| CN109637443A true CN109637443A (en) | 2019-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110797413A (en) * | 2019-11-11 | 2020-02-14 | 云谷（固安）科技有限公司 | Thin film transistor, pixel driving circuit and display panel |
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Application publication date: 20190416 |
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| RJ01 | Rejection of invention patent application after publication |