CN107591125A - The drive circuit and driving method of a kind of electroluminescent cell, display device - Google Patents
The drive circuit and driving method of a kind of electroluminescent cell, display device Download PDFInfo
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- CN107591125A CN107591125A CN201711018361.9A CN201711018361A CN107591125A CN 107591125 A CN107591125 A CN 107591125A CN 201711018361 A CN201711018361 A CN 201711018361A CN 107591125 A CN107591125 A CN 107591125A
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- drive circuit
- pole
- electroluminescent cell
- switch pipe
- switching tube
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Abstract
The present invention provides a kind of drive circuit and driving method, display device of electroluminescent cell.The drive circuit of the electroluminescent cell includes first switch pipe, also include at least two drive circuit units, drive circuit unit is connected in parallel with each other, and the first pole of drive circuit unit connection first switch pipe, control signal is lighted in the grid connection of first switch pipe, the anode of the second pole connection electroluminescent cell of first switch pipe, the negative electrode of electroluminescent cell connect the first potential end；Drive circuit unit is used to drive electroluminescent cell to light according to the data-signal of write-in.The parallel drive while drive circuit can realize at least two drive circuit units to electroluminescent cell, so as to increase the excursion of the driving current of electroluminescent cell, and then the brightness regulation scope of electroluminescent cell is increased, expand the application scenarios scope of the ORGANIC ELECTROLUMINESCENCE DISPLAYS product using the drive circuit.
Description
Technical field
The present invention relates to display technology field, in particular it relates to a kind of drive circuit of electroluminescent cell and driving side
Method, display device.
Background technology
Electroluminescence display panel is aobvious including organic electroluminescent (Organic Light-Emitting Diode, OLED)
Show panel and inorganic EL (MicroLED) display panel.At present, greatly developing with Display Technique, electroluminescent shows
Show that panel turns into the trend of following display panel industry with its high contrast and low power consumption.
In the making of silicon substrate electroluminescence display panel, due to the limitation of processing procedure (i.e. preparation technology), electroluminescent hair is passed to
The data area (data voltage range) of optical element (i.e. pixel) can be subject to certain restrictions, and cause the brightness of electroluminescent cell
Adjustable range be able to can be limited in a less scope by a definite limitation, i.e. the brightness regulation scope of electroluminescent cell,
Limited brightness regulation scope can be such that the application scenarios of silicon substrate electroluminescence display panel are limited in limited scope, serious shadow
The extensive use of electroluminescence display panel is rung.
The content of the invention
The present invention is for above-mentioned technical problem present in prior art, there is provided a kind of drive circuit of electroluminescent cell
With driving method, display device.The drive circuit of the electroluminescent cell is by setting at least two driving electricity being connected in parallel
Road unit, parallel drive while at least two drive circuit units can be realized to electroluminescent cell, so as to increase electricity
The excursion of the driving current of electroluminescent element, and then the brightness regulation scope of electroluminescent cell is increased, expand and adopt
With the application scenarios scope of the ORGANIC ELECTROLUMINESCENCE DISPLAYS product of the drive circuit.
The present invention provides a kind of drive circuit of electroluminescent cell, including first switch pipe, in addition at least two drive
Dynamic circuit unit, the drive circuit unit are connected in parallel with each other, and the drive circuit unit connects the first switch pipe
The first pole, control signal is lighted in the grid connection of the first switch pipe, described in the second pole connection of the first switch pipe
The anode of electroluminescent cell, the negative electrode of the electroluminescent cell connect the first potential end；
The drive circuit unit is used to drive the electroluminescent cell to light according to the data-signal of write-in.
Preferably, the circuit all same of each drive circuit unit；Each drive circuit unit includes the
Two switching tubes, the 3rd switching tube, the first electric capacity and the first driving tube；
The grid of the second switch pipe connects the first charging control signal, the grid connection second of the 3rd switching tube
Charging control signal, the first pole of the second switch pipe connect the first data-signal with the first pole of the 3rd switching tube,
Second pole of the second switch pipe connects the grid of first driving tube and described with the second pole of the 3rd switching tube
First pole of the first electric capacity；
Second pole of first electric capacity connects the second potential end with the first pole of first driving tube；Described first drives
Second pole of dynamic pipe connects the first pole of the first switch pipe.
Preferably, the drive circuit unit includes two, respectively the first drive circuit unit and the second drive circuit
Unit；
First drive circuit unit includes second switch pipe, the 3rd switching tube, the first electric capacity and the first driving tube；Institute
Stating the second drive circuit unit includes the 4th switching tube, the 5th switching tube, the second electric capacity and the second driving tube；
The grid of the second switch pipe connects the first charging control signal with the grid of the 4th switching tube, and described
The grid of three switching tubes connects the second charging control signal with the grid of the 5th switching tube；
First pole of the second switch pipe connects the first data-signal with the first pole of the 3rd switching tube, and described
Second pole of two switching tubes connects the grid of first driving tube and first electricity with the second pole of the 3rd switching tube
The first pole held；Second pole of first electric capacity connects the second potential end with the first pole of first driving tube；
First pole of the 4th switching tube connects the second data-signal with the first pole of the 5th switching tube, and described
Second pole of four switching tubes connects the grid of second driving tube and second electricity with the second pole of the 5th switching tube
The first pole held；Second pole of second electric capacity connects the 3rd potential end with the first pole of second driving tube；
Second pole of first driving tube connects the of the first switch pipe with the second pole of second driving tube
One pole.
Preferably, the second switch pipe uses P-type transistor, and the 3rd switching tube uses N-type transistor；Described
One driving tube uses P-type transistor.
Preferably, the 4th switching tube uses P-type transistor, and the 5th switching tube uses N-type transistor；Described
Two driving tubes use P-type transistor.
Preferably, the current potential of second potential end is higher than the current potential of first potential end.
Preferably, the current potential of the 3rd potential end is higher than the current potential of first potential end.
Preferably, the first switch pipe uses N-type transistor or P-type transistor.
The present invention also provides a kind of display device, includes the drive circuit of above-mentioned electroluminescent cell.
The present invention also provides a kind of driving method of the drive circuit of above-mentioned electroluminescent cell, including：
Data-signal write phase, data-signal are respectively written into each drive circuit unit；
Glow phase, under the control for lighting control signal, each drive circuit unit is according to the data-signal
The electroluminescent cell is driven simultaneously, so that the electroluminescent cell lights.
Beneficial effects of the present invention：The drive circuit of electroluminescent cell provided by the present invention, by setting at least two
The individual drive circuit unit being connected in parallel, it is parallel while at least two drive circuit units can be realized to electroluminescent cell
Driving, so as to increase the excursion of the driving current of electroluminescent cell, and then increases the brightness of electroluminescent cell
Adjustable range, expand the application scenarios scope of the ORGANIC ELECTROLUMINESCENCE DISPLAYS product using the drive circuit.
Display device provided by the present invention, by using above-mentioned drive circuit, the brightness of the display device can be increased
Adjustable range, so as to expand the application scenarios scope of the display device.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the drive circuit of electroluminescent cell in the embodiment of the present invention 1；
Fig. 2 is the circuit diagram of the drive circuit of electroluminescent cell in the embodiment of the present invention 1；
Fig. 3 is the driver' s timing figure of the drive circuit of electroluminescent cell in the embodiment of the present invention 1；
Fig. 4 is the circuit diagram of the drive circuit of electroluminescent cell in the embodiment of the present invention 2.
Description of reference numerals therein：
1. drive circuit unit；11. the first drive circuit unit；12. the second drive circuit unit.
Embodiment
To make those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings and it is embodied
Mode is further detailed to drive circuit and driving method, the display device work of a kind of electroluminescent cell provided by the present invention
Description.
Embodiment 1：
The present embodiment provides a kind of drive circuit of electroluminescent cell, as shown in figure 1, including first switch pipe T1, goes back
Including at least two drive circuit units 1, drive circuit unit 1 is connected in parallel with each other, and the connection of drive circuit unit 1 first is opened
Pipe T1 the first pole is closed, first switch pipe T1 grid, which connects, lights control signal Emission, and the second of first switch pipe T1
Pole connection electroluminescent cell EL anode, electroluminescent cell EL negative electrode connect the first potential end VSS；Drive circuit unit
1 is used to drive electroluminescent cell EL to light according to the data-signal Data of write-in.
In the present embodiment, electroluminescent cell EL uses organic electroluminescent device.It should be noted that electroluminescent is first
Part can also use inorganic el element.
The existing a set of drive circuit of electroluminescent cell generally use is driven, and due to drive circuit processing procedure (i.e.
Preparation technology) limitation, the data signal voltage range that a set of drive circuit passes to electroluminescent cell can be restricted, and make electricity
The data signal voltage range of electroluminescent element is limited in a less scope, so as to cause the bright of electroluminescent cell
Degree adjustable range is also limited in a less scope.By setting at least two drivings being connected in parallel in the present embodiment
Circuit unit 1, parallel drive while at least two drive circuit units 1 can be realized to electroluminescent cell EL, so as to increase
The big excursion of electroluminescent cell EL driving current, and then increase electroluminescent cell EL brightness regulation model
Enclose, expand the application scenarios scope of the ORGANIC ELECTROLUMINESCENCE DISPLAYS product using the drive circuit.
In the present embodiment, as shown in Fig. 2 drive circuit unit 1 includes two, the respectively He of the first drive circuit unit 11
Second drive circuit unit 12.First drive circuit unit 11 includes second switch pipe T2, the 3rd switch transistor T 3, the first electric capacity C1
With the first driving tube D1；Second drive circuit unit 12 includes the 4th switch transistor T 4, the 5th switch transistor T 5, the second electric capacity C2 and the
Two driving tube D2；Second switch pipe T2 grid and the grid of the 4th switch transistor T 4 connect the first charging control signal Rowsel,
The grid of 3rd switch transistor T 3 and the grid of the 5th switch transistor T 5 connect the second charging control signal Rowsel_B；Second switch pipe
T2 the first pole connects the first data-signal Data1 with the first pole of the 3rd switch transistor T 3, second switch pipe T2 the second pole and
Second pole of the 3rd switch transistor T 3 connects the first driving tube D1 grid and the first electric capacity C1 the first pole；The of first electric capacity C1
Two poles connect the second potential end VDD1 with the first driving tube D1 the first pole；First pole of the 4th switch transistor T 4 and the 5th switching tube
T5 the first pole connects the second data-signal Data2, and the second pole of the 4th switch transistor T 4 and the second pole of the 5th switch transistor T 5 connect
Connect the second driving tube D2 grid and the second electric capacity C2 the first pole；Second electric capacity C2 the second pole and the of the second driving tube D2
One pole connects the 3rd potential end VDD2；First driving tube D1 the second pole connects first switch with the second driving tube D2 the second pole
Pipe T1 the first pole.
Wherein, second switch pipe T2 uses P-type transistor, and the 3rd switch transistor T 3 uses N-type transistor；First driving tube D1
Using P-type transistor.4th switch transistor T 4 uses P-type transistor, and the 5th switch transistor T 5 uses N-type transistor；Second driving tube
D2 uses P-type transistor.First switch pipe T1 uses N-type transistor.Second potential end VDD1 current potential is higher than the first potential end
VSS current potential.3rd potential end VDD2 current potential is higher than the first potential end VSS current potential.
It should be noted that first switch pipe T1 can also use P-type transistor.N-type transistor in the present embodiment is such as
NMOS tube, the P-type transistor such as PMOS in the present embodiment.
It is further to note that drive circuit unit 1 in the present embodiment is it can also be provided that more than three, and it is each
Drive circuit unit 1 can use the switching tube of different unlatching performances and the driving tube of different driving performance to form respective drive
Dynamic circuit unit.
Based on the drive circuit of above-mentioned electroluminescent cell, the present embodiment also provides a kind of driving side of the drive circuit
Method, as shown in figure 3, including：
Data-signal write phase S1, data-signal are respectively written into each drive circuit unit.
At this stage, as shown in Figures 2 and 3, the first charging control signal Rowsel is low level, and the second charge control is believed
Number Rowsel_B is high level, and second switch pipe T2 and the 3rd switch transistor T 3 are opened, and the first data-signal Data1 write-ins first are driven
Dynamic circuit unit 11, and store to the first electric capacity C1；Meanwhile the 4th switch transistor T 4 and the 5th switch transistor T 5 open, the second data
Signal Data2 writes the second drive circuit unit 12, and stores to the second electric capacity C2.At this stage, control signal is lighted
Emission is low level, and electroluminescent cell EL does not light.
Glow phase S2, in the case where lighting control signal Emission control, each drive circuit unit is believed according to data
Number simultaneously electroluminescent cell is driven so that electroluminescent cell lights.
At this stage, it is high level to light control signal Emission, and first switch pipe T1 is opened, and flows through the first driving tube
D1 electric current I1 is proportional to (VData1-VDD1-Vth1)2, wherein, Vth1 is the first driving tube D1 threshold voltage；Flow through
Two driving tube D2 electric current I2 is proportional to (VData2-VDD2-Vth2)2, wherein, the threshold value electricity that Vth2 is the second driving tube D2
Pressure；The electric current for flowing through electroluminescent cell EL is I1+I2, and electroluminescent cell EL lights, and its luminous intensity is proportional to I1+I2.
Wherein, the excursion of electroluminescent cell EL electric current is I1+I2, correspondingly, electroluminescent cell EL brightness regulation model
Enclose the excursion for being proportional to its electric current.
From the driving method of above-mentioned electroluminescence component drive circuit, by using two drivings being connected in parallel
Circuit unit drives electroluminescent cell to light simultaneously, compared to it is existing only with a set of drive circuit to electroluminescent cell
It is driven, increases the excursion of electroluminescent cell EL driving current, so as to increases electroluminescent cell EL's
Brightness regulation scope, and assume the first drive circuit unit in the present embodiment and the second drive circuit unit due to by processing procedure
The limitation to the data signal voltage range of electroluminescent cell is limited with existing a set of drive circuit to electroluminescent cell
Data signal voltage range limitation all same, then whole drive circuit in the present embodiment by processing procedure due to being limited pair
Data of the limitation of the data signal voltage range of electroluminescent cell with existing a set of drive circuit to electroluminescent cell
The limitation of signal voltage range is identical；Therefore, the drive circuit provided in the present embodiment be included in processing procedure limitation in the case of,
Electroluminescent cell EL brightness regulation scope can equally be increased, so as to expand the organic electroluminescent using the drive circuit
Show the application scenarios scope of product.
Embodiment 2：
The present embodiment provides a kind of drive circuit of electroluminescent cell, unlike embodiment 1, as shown in figure 4,
The circuit all same of each drive circuit unit 1；Each drive circuit unit 1 includes second switch pipe T2, the 3rd switching tube
T3, the first electric capacity C1 and the first driving tube D1.Second switch pipe T2 grid connection the first charging control signal Rowsel, the 3rd
The grid of switch transistor T 3 connects the second charging control signal Rowsel_B, second switch pipe T2 the first pole and the 3rd switch transistor T 3
The first pole connect the first data-signal Data1, second switch pipe T2 the second pole connects with the second pole of the 3rd switch transistor T 3
First pole of the first driving tube D1 grid and the first electric capacity C1；First electric capacity C1 the second pole and the first of the first driving tube D1
Pole connects the second potential end VDD1；First driving tube D1 the second pole connection first switch pipe T1 the first pole.
Drive circuit unit 1 in the present embodiment is provided with two.Certainly, drive circuit unit 1 can also set three
More than.
Switching tube, driving tube in the present embodiment in drive circuit and the second potential end VDD1 set with embodiment 1
Identical, here is omitted.
Based on above-mentioned drive circuit, the present embodiment also provides a kind of driving method of the drive circuit, the driving method
Driving process and principle are in the same manner as in Example 1, and here is omitted.
Embodiment 1-2 beneficial effect：The drive circuit for the electroluminescent cell that embodiment 1-2 is provided, pass through setting
At least two drive circuit units being connected in parallel, at least two drive circuit units can be realized to the same of electroluminescent cell
When parallel drive, so as to increase the excursion of the driving current of electroluminescent cell, and then increase electroluminescent cell
Brightness regulation scope, expand the application scenarios scope of the ORGANIC ELECTROLUMINESCENCE DISPLAYS product using the drive circuit.
Embodiment 3：
The present embodiment provides a kind of display device, including the drive circuit in embodiment 1 or 2.
By using the drive circuit in embodiment 1 or 2, the brightness regulation scope of the display device can be increased, so as to
Expand the application scenarios scope of the display device.
Display device provided by the present invention can be organic electroluminescence panel, organic electroluminescent TV, without electromechanics
Any product or part with display function such as electro-luminescence panel, inorganic EL TV, display, mobile phone, navigator.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, but the invention is not limited in this.For those skilled in the art, the essence of the present invention is not being departed from
In the case of refreshing and essence, various changes and modifications can be made therein, and these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of drive circuit of electroluminescent cell, including first switch pipe, it is characterised in that also including at least two drivings
Circuit unit, the drive circuit unit are connected in parallel with each other, and the drive circuit unit connects the first switch pipe
Control signal is lighted in first pole, the grid connection of the first switch pipe, and the second pole of the first switch pipe connects the electricity
The anode of electroluminescent element, the negative electrode of the electroluminescent cell connect the first potential end；
The drive circuit unit is used to drive the electroluminescent cell to light according to the data-signal of write-in.
2. the drive circuit of electroluminescent cell according to claim 1, it is characterised in that each drive circuit list
The circuit all same of member；Each drive circuit unit includes second switch pipe, the 3rd switching tube, the first electric capacity and first
Driving tube；
The grid of the second switch pipe connects the first charging control signal, the charging of grid connection second of the 3rd switching tube
Control signal, the first pole of the second switch pipe connects the first data-signal with the first pole of the 3rd switching tube, described
Second pole of second switch pipe connects the grid and described first of first driving tube with the second pole of the 3rd switching tube
First pole of electric capacity；
Second pole of first electric capacity connects the second potential end with the first pole of first driving tube；First driving tube
The second pole connect the first pole of the first switch pipe.
3. the drive circuit of electroluminescent cell according to claim 1, it is characterised in that the drive circuit unit bag
Include two, respectively the first drive circuit unit and the second drive circuit unit；
First drive circuit unit includes second switch pipe, the 3rd switching tube, the first electric capacity and the first driving tube；Described
Two drive circuit units include the 4th switching tube, the 5th switching tube, the second electric capacity and the second driving tube；
The grid of the second switch pipe connects the first charging control signal with the grid of the 4th switching tube, and the described 3rd opens
The grid for closing pipe connects the second charging control signal with the grid of the 5th switching tube；
First pole of the second switch pipe connects the first data-signal with the first pole of the 3rd switching tube, and described second opens
The second pole for closing pipe connects with the second pole of the 3rd switching tube grid of first driving tube and first electric capacity
First pole；Second pole of first electric capacity connects the second potential end with the first pole of first driving tube；
First pole of the 4th switching tube connects the second data-signal with the first pole of the 5th switching tube, and the described 4th opens
The second pole for closing pipe connects with the second pole of the 5th switching tube grid of second driving tube and second electric capacity
First pole；Second pole of second electric capacity connects the 3rd potential end with the first pole of second driving tube；
Second pole of first driving tube connects the first pole of the first switch pipe with the second pole of second driving tube.
4. the drive circuit of the electroluminescent cell according to Claims 2 or 3, it is characterised in that the second switch pipe
Using P-type transistor, the 3rd switching tube uses N-type transistor；First driving tube uses P-type transistor.
5. the drive circuit of electroluminescent cell according to claim 3, it is characterised in that the 4th switching tube uses
P-type transistor, the 5th switching tube use N-type transistor；Second driving tube uses P-type transistor.
6. the drive circuit of the electroluminescent cell according to Claims 2 or 3, it is characterised in that second potential end
Current potential be higher than first potential end current potential.
7. the drive circuit of electroluminescent cell according to claim 3, it is characterised in that the electricity of the 3rd potential end
Position is higher than the current potential of first potential end.
8. the drive circuit of electroluminescent cell according to claim 1, it is characterised in that the first switch pipe uses
N-type transistor or P-type transistor.
9. a kind of display device, it is characterised in that include the driving of the electroluminescent cell described in claim 1-8 any one
Circuit.
10. a kind of driving method of the drive circuit of electroluminescent cell as described in claim 1-8 any one, its feature
It is, including：
Data-signal write phase, data-signal are respectively written into each drive circuit unit；
Glow phase, under the control for lighting control signal, each drive circuit unit according to the data-signal simultaneously
The electroluminescent cell is driven, so that the electroluminescent cell lights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711018361.9A CN107591125A (en) | 2017-10-26 | 2017-10-26 | The drive circuit and driving method of a kind of electroluminescent cell, display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711018361.9A CN107591125A (en) | 2017-10-26 | 2017-10-26 | The drive circuit and driving method of a kind of electroluminescent cell, display device |
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