CN104361861B - A kind of Organnic electroluminescent device - Google Patents
A kind of Organnic electroluminescent device Download PDFInfo
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- CN104361861B CN104361861B CN201410667431.3A CN201410667431A CN104361861B CN 104361861 B CN104361861 B CN 104361861B CN 201410667431 A CN201410667431 A CN 201410667431A CN 104361861 B CN104361861 B CN 104361861B
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- scanner driver
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- organnic electroluminescent
- pixel cell
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Abstract
The invention belongs to field of organic electroluminescence, a kind of described Organnic electroluminescent device, including a data driver, one first scanner driver, two the second scanner drivers, the pixel cell of one the 3rd scanner driver and some array arrangements；Each column pixel cell is connected by data wire and is connected to data driver；Often row pixel cell is connected by the first scan line and is connected to the first scanner driver；Often row pixel cell is connected by the second scan line and is connected to the second scanner driver；Often row pixel cell is connected by three scan line and is connected to the 3rd scanner driver；By being electrically connected mode switching unit in each scan line, level for adjusting each scan line, so as to realize Organnic electroluminescent device any switching laws between display pattern and light illumination mode, and then the recycling for the badness screen body that can be lighted but can not normally show is realized, it is effectively saved resource.
Description
Technical field
The present invention relates to display technology field, and in particular to it is a kind of can having in display pattern and light illumination mode any switching laws
Organic electro luminescent device.
Background technology
Flat-panel monitor have fully planarize, light, thin, power saving the features such as, be the inexorable trend of image display development
And research focus.In various types of panel display apparatus, due to active matrix organic electroluminescence device, (English full name is
Active Matrix Organic Light Emitting Display, abbreviation AMOLED) use self luminous organic light emission
Diode (English full name is Organic Light Emitting Diode, abbreviation OLED) carrys out display image, during with response
Between it is short, be driven using low-power consumption, the characteristic of relatively more preferable brightness and colour purity, so Organnic electroluminescent device is
Through the focus as display device of future generation.
For large-scale active matrix organic electroluminescence device, including positioned at many of the intersection region of scan line and data wire
Individual pixel cell.Each pixel cell includes Organic Light Emitting Diode and the pixel electricity for driving the Organic Light Emitting Diode
Road, image element circuit then further comprises switching transistor, the component such as driving transistor and storage.
As shown in figure 1, traditional active matrix organic electroluminescence device passes through data wire Dm and the electricity of data driver 40
Connect, electrically connected by scan line Sn with scanner driver 11, in addition to power line ELVDD and ELVSS, and it is connected to these
Line and some pixel cells 50 being arranged in matrix.Each pixel cell 50 generally includes an Organic Light Emitting Diode
OLED, two thin film transistor (TFT)s and one are used for the capacitor for keeping data voltage.
Due to containing substantial amounts of thin-film device in active matrix organic electroluminescence device, the accuracy of manufacture is high, in manufacture
During unavoidably there are various defects, lead to not the generation of badness screen body normally shown.In the prior art, these energy
The usual waste treatment of badness screen body enough lighted but can not normally shown, causes the serious wasting of resources.
The content of the invention
It is existing display Organnic electroluminescent device because manufacturing defect can be lighted therefore, to be solved by this invention
But it can not normally show that the problem of in turn resulting in the wasting of resources can be in display pattern there is provided one kind so as to cause screen body to discard
The Organnic electroluminescent device switched at any time with light illumination mode.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
A kind of Organnic electroluminescent device of the present invention, including a data driver, one first scanner driver, two
The pixel cell of individual second scanner driver, one the 3rd scanner driver and some array arrangements；Pixel cell described in each column
Connected by data wire and be connected to the data driver；The pixel cell of often going is connected and connected by the first scan line
To first scanner driver；The pixel cell of often going is connected by the second scan line and is connected to second scanning and driven
Dynamic device；The pixel cell of often going is connected by three scan line and is connected to the 3rd scanner driver；
Each scan line is electrically connected with separate mode switching unit, and the mode switching unit is used to adjust
The level of each scan line.
The mode switching unit includes at least one P-type TFT, the source electrode of the thin film transistor (TFT) or drain electrode
The output end of each scan line is electrically connected to, the source electrode of the thin film transistor (TFT) or drain electrode are electrically connected to fixed level, described
The grid of thin film transistor (TFT) is electrically connected to external control signal.
Thin film transistor (TFT) described in the mode switching unit that first scan line is connected with the three scan line
It is connected to fixed low level；Thin film transistor (TFT) is connected to described in the mode switching unit of the second scan line connection
Fixed high level.
The mode switching unit includes at least one P-type TFT, the source electrode of the thin film transistor (TFT) or drain electrode
The grid that thin film transistor (TFT) is driven in each scanner driver is electrically connected to, the source electrode of the thin film transistor (TFT) or drain electrode are electrically connected
Fixed low level is connected to, the grid of the thin film transistor (TFT) is electrically connected to external control signal.
The source electrode of the driving thin film transistor (TFT) in first scanner driver or drain electrode are electrically connected to described first
The output end of scan line；The source electrode of the driving thin film transistor (TFT) in second scanner driver or drain electrode are electrically connected to institute
State the output end of the second scan line；The source electrode of the driving thin film transistor (TFT) in 3rd scanner driver or drain electrode are electrically connected
It is connected to the output end of the three scan line.
First scanner driver is separately positioned on the battle array of the pixel cell formation with the 3rd scanner driver
Arrange both sides；Two second scanner drivers are set with first scanner driver, the 3rd scanner driver respectively
In the array homonymy of pixel cell formation.
The Organnic electroluminescent device further comprises the first power supply, second source.
The fixed low level can be -7~-10V, and the fixed high level is 7~10V.
The external control signal is set to direct current high level, and the Organnic electroluminescent device is display pattern；It is described
Direct current high level is more than or equal to the fixed high level.
The external control signal is set to direct current low level, and the Organnic electroluminescent device is light illumination mode；It is described
Direct current low level is less than or equal to the fixed low level.
The above-mentioned technical proposal of the present invention has advantages below compared with prior art：
1st, a kind of Organnic electroluminescent device of the present invention, each column pixel cell is connected and is connected to by data wire
Data driver；Often row pixel cell is connected by the first scan line and is connected to first scanner driver, passes through second
Scan line is connected and is connected to the second scanner driver, is connected by three scan line and is connected to the 3rd turntable driving
Device；By electrically connecting mode switching unit in each scan line, for adjusting the level of each scan line, so as to have described in realizing
Organic electro luminescent device any switching laws between display pattern and light illumination mode, so realize can light but can not normally show
Badness screen body recycling, be effectively saved resource.
2nd, a kind of Organnic electroluminescent device of the present invention, is provided with two the second scanner drivers, effectively enhancing
Its driving force, has smaller rising edge trailing edge than independent scan driver, therefore the second scanner driver is as double
End driving energy strengthens its driving force.First scanner driver is separately positioned on the picture with the 3rd scanner driver
The array both sides of plain unit formation, effectively reduce the border width of the Organnic electroluminescent device, optimize described organic
The structure of el light emitting device.
Brief description of the drawings
In order that present disclosure is more likely to be clearly understood, specific embodiment and combination below according to the present invention
Accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the structural map of conventional active matrix Organnic electroluminescent device in the prior art；
Fig. 2 is the structural map of Organnic electroluminescent device of the present invention；
Fig. 3 is the circuit diagram of a pixel cell in the prior art；
Fig. 4 is the circuit diagram of mode switching unit described in embodiment 1；
Fig. 5 is that mode switching unit described in embodiment 1 accesses the output wave under display pattern after pixel cell described in Fig. 3
Shape；
Fig. 6 is the output wave that mode switching unit described in embodiment 1 is accessed under pixel cell back lighting pattern described in Fig. 3
Shape；
Fig. 7 is the circuit diagram of Organnic electroluminescent device turntable driving described in embodiment 2.
Reference is expressed as in figure：The scanner drivers of 10- first, the scanner drivers of 20- second, the scannings of 30- the 3rd are driven
Dynamic device, 40- data drivers, 50- pixel cells, 60- pixel unit arrays, 70- mode switching units, S1n- first are scanned
Line, the scan lines of S2n- second, EMn- three scan lines, Dm- data wires, RESET- external control signals, OUT- scan lines it is defeated
Go out end, the power supplys of ELVDD- first, ELVSS- second sources, OLED- Organic Light Emitting Diodes, VREF- reference power sources, VGH- positive electricity
Source input, VGL- negative supplies input, Mn- thin film transistor (TFT)s, Cn- electric capacity.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Certain exemplary embodiments according to the present invention are described referring to the drawings.Here, it is described as when by the first element
When ' attach ' to the second element, the first element can be directly connected to the second element, or by between one or more add ons
The second element is connected in succession.Further, for the sake of clarity, concisely eliminate be not for fully understanding the present invention must
Some elements of palpus.In addition, identical reference refers to identical element all the time.
Embodiment 1
The present embodiment provides a kind of Organnic electroluminescent device, as shown in Fig. 2 including a data driver 40, one first
Scanner driver 10, two the second scanner drivers 20, one the 3rd scanner driver 30, the pixel cells of some array arrangements
50, and the first power supply ELVDD, second source ELVSS.
First scanner driver 10 is separately positioned on the shape of pixel cell 50 with the 3rd scanner driver 30
Into the both sides of array 60；Two second scanner drivers 20 are swept with first scanner driver 10, the described 3rd respectively
Retouch the array homonymy that driver 30 is arranged on the formation of pixel cell 50.
The Organnic electroluminescent device is provided with two the second scanner drivers 20, effectively enhances its driving force,
There is smaller rising edge trailing edge than independent scan driver, therefore the second scanner driver 20 strengthens as both-end driving energy
Its driving force.As the convertible embodiment of the present invention, first scanner driver 10 and the 3rd scanner driver
30 it can also be provided that double-ended structure is to strengthen its signal driving force.
First scanner driver 10 is separately positioned on the pixel cell with the 3rd scanner driver 30 and formed
The both sides of array 60, effectively reduce the border width of the Organnic electroluminescent device, optimize the organic electroluminescent
The structure of device.
Pixel cell 50 described in each column is connected by data wire Dm and is connected to the data driver 40；Often go the picture
Plain unit 50 is connected by the first scan line S1n and is connected to first scanner driver 10；Often go the pixel cell 50
Connected by the second scan line S2n and be connected to second scanner driver 20；The pixel cell 50 of often going passes through the 3rd
Scan line EMn connects and is connected to the 3rd scanner driver 30.
Each described scan line S1n, S2n, EMn are electrically connected with separate mode switching unit 70, and the pattern turns
Change the level that unit 70 is used to adjust each described scan line S1n, S2n, EMn.
As shown in figure 4, the mode switching unit 70 is three end structures, including a P-type TFT, the film
A pole in the source electrode of transistor or drain electrode is electrically connected to each described scan line S1n, S2n, EMn output end OUT, another extremely electricity
Fixed level is connected to, the grid of the thin film transistor (TFT) is electrically connected to external control signal RESET.
Wherein, institute in the mode switching unit 70 that the first scan line S1n is connected with the three scan line EMn
State thin film transistor (TFT) and be connected to fixed low level；Institute in the mode switching unit 70 of the second scan line S2n connections
State thin film transistor (TFT) and be connected to fixed high level.The fixed low level can be -7~-10V, the fixed high level be 7~
10V。
When the external control signal RESET is set to direct current high level, and the direct current high level is to be more than or wait
In the fixed high level, the mode switching unit 70 can not work, first scanner driver 10, second scanning
Driver 20 and the equal normal work of the 3rd scanner driver 30, the Organnic electroluminescent device are display pattern.
When the external control signal RESET is set to direct current low level, and the direct current low level is to be less than or wait
In the fixed low level, first scanner driver 10 is output as low level, second scanner driver 20 and is output as
High level, the 3rd scanner driver 30 are output as low level, and the Organnic electroluminescent device will be cut in normal bright state
It is changed to light illumination mode.
By taking the circuit of the conventional pixel cell 50 shown in Fig. 3 as an example (including thin film transistor (TFT) M1~M6, electric capacity C1, have
Machine light emitting diode OLED, the first power supply ELVDD, second source ELVSS, with reference to electric VREF etc.), each scan line S1n,
S2n, EMn are respectively connected to the mode switching unit 70 shown in Fig. 4, its output wave under display pattern and light illumination mode
Shape difference is as shown in Figure 5 and Figure 6.
As the convertible embodiment of the present invention, the mode switching unit 70 can also include multiple p-type film crystals
Pipe, can realize the purpose of the present invention, belong to protection scope of the present invention.
Embodiment 2
The present embodiment provides a kind of Organnic electroluminescent device, as shown in Fig. 2 including a data driver 40, one first
Scanner driver 10, two the second scanner drivers 20, one the 3rd scanner driver 30, the pixel cells of some array arrangements
50, and the first power supply ELVDD, second source ELVSS.
First scanner driver 10 is separately positioned on the shape of pixel cell 50 with the 3rd scanner driver 30
Into the both sides of array 60；Two second scanner drivers 20 are swept with first scanner driver 10, the described 3rd respectively
Retouch the array homonymy that driver 30 is arranged on the formation of pixel cell 50.
The Organnic electroluminescent device is provided with two the second scanner drivers 20, effectively enhances its driving force,
There is smaller rising edge trailing edge than independent scan driver, therefore the second scanner driver 20 strengthens as both-end driving energy
Its driving force.As the convertible embodiment of the present invention, first scanner driver 10 and the 3rd scanner driver
30 it can also be provided that double-ended structure is to strengthen its signal driving force.
First scanner driver 10 is separately positioned on the pixel cell with the 3rd scanner driver 30 and formed
The both sides of array 60, effectively reduce the border width of the Organnic electroluminescent device, optimize the organic electroluminescent
The structure of device.
Pixel cell 50 described in each column is connected by data wire Dm and is connected to the data driver 40；Often go the picture
Plain unit 50 is connected by the first scan line S1n and is connected to first scanner driver 10；Often go the pixel cell 50
Connected by the second scan line S2n and be connected to second scanner driver 20；The pixel cell 50 of often going passes through the 3rd
Scan line EMn connects and is connected to the 3rd scanner driver 30.
Each described scan line S1n, S2n, EMn are electrically connected with separate mode switching unit 70, and the pattern turns
Change the level that unit 70 is used to adjust each described scan line S1n, S2n, EMn.
So that one scan drives as an example, as shown in fig. 7, the mode switching unit 70 includes a P-type TFT, institute
State thin film transistor (TFT) source electrode or drain electrode in a pole be electrically connected in each scanner driver 10,20,30 and drive film brilliant
Body pipe M1 grid, another pole is electrically connected to fixed low level, and the grid of the thin film transistor (TFT) is electrically connected to outside control letter
Number RESET.The source electrode of the driving thin film transistor (TFT) M1 or drain electrode be respectively electrically connected to each self-driven scan line S1n,
S2n, EMn output end.The fixed low level can be -7~-10V, and the fixed high level is 7~10V.
When the external control signal RESET is set to direct current high level, and the direct current high level is to be more than or wait
In the fixed high level, the mode switching unit 70 can not work, first scanner driver 10, second scanning
Driver 20 and the equal normal work of the 3rd scanner driver 30, the Organnic electroluminescent device are display pattern.
When the external control signal RESET is set to direct current low level, and the direct current low level is to be less than or wait
In the fixed low level, first scanner driver 10 is output as low level, second scanner driver 20 and is output as
High level, the 3rd scanner driver 30 are output as low level, and the Organnic electroluminescent device will be cut in normal bright state
It is changed to light illumination mode.
As the convertible embodiment of the present invention, the mode switching unit 70 can also include multiple p-type film crystals
Pipe, can realize the purpose of the present invention, belong to protection scope of the present invention.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in protection scope of the present invention.
Claims (14)
1. a kind of Organnic electroluminescent device, it is characterised in that including a data driver (40), one first scanner driver
(10), the pixel cell of two the second scanner drivers (20), one the 3rd scanner driver (30) and some array arrangements
(50)；Pixel cell described in each column (50) is by data wire (Dm) series connection and is connected to the data driver (40)；Every row institute
Pixel cell (50) is stated by the first scan line (S1n) series connection and first scanner driver (10) is connected to；Often row is described
Pixel cell (50) is by the second scan line (S2n) series connection and is connected to second scanner driver (20)；Often go the picture
Plain unit (50) is by three scan line (EMn) series connection and is connected to the 3rd scanner driver (30)；
Each scan line (S1n, S2n, EMn) is electrically connected with separate mode switching unit (70), and the pattern turns
Change the level that unit (70) is used to adjust each scan line (S1n, S2n, EMn)；The mode switching unit (70) is included extremely
A few P-type TFT, the source electrode of the thin film transistor (TFT) or a pole of drain electrode be electrically connected to each scan line (S1n,
S2n, EMn) output end, another pole is electrically connected to fixed level, and the grid of the thin film transistor (TFT) is electrically connected to outside control
Signal (RESET).
2. Organnic electroluminescent device according to claim 1, it is characterised in that first scan line (S1n) and institute
State the thin film transistor (TFT) in the mode switching unit (70) of three scan line (EMn) connection and be connected to fixed low electricity
It is flat；Thin film transistor (TFT) is connected to fixed height described in the mode switching unit (70) of second scan line (S2n) connection
Level.
3. Organnic electroluminescent device according to claim 2, it is characterised in that first scanner driver (10) with
3rd scanner driver (30) is separately positioned on the array both sides of the pixel cell (50) formation；Two described second are swept
Retouch driver (20) and be arranged on the pixel with first scanner driver (10), the 3rd scanner driver (30) respectively
The array homonymy of unit (50) formation.
4. Organnic electroluminescent device according to claim 3, it is characterised in that further comprise the first power supply (ELVDD),
Second source (ELVSS).
5. Organnic electroluminescent device according to claim 4, it is characterised in that the fixed low level is -7~-10V,
The fixed high level is 7~10V.
6. Organnic electroluminescent device according to claim 5, it is characterised in that the external control signal (RESET) sets
Direct current high level is set to, the Organnic electroluminescent device is display pattern；The direct current high level is more than or equal to described
Fixed high level.
7. Organnic electroluminescent device according to claim 5, it is characterised in that the external control signal (RESET) sets
Direct current low level is set to, the Organnic electroluminescent device is light illumination mode；The direct current low level is less than or equal to described
Fixed low level.
8. a kind of Organnic electroluminescent device, it is characterised in that including a data driver (40), one first scanner driver
(10), the pixel cell of two the second scanner drivers (20), one the 3rd scanner driver (30) and some array arrangements
(50)；Pixel cell described in each column (50) is by data wire (Dm) series connection and is connected to the data driver (40)；Every row institute
Pixel cell (50) is stated by the first scan line (S1n) series connection and first scanner driver (10) is connected to；Often row is described
Pixel cell (50) is by the second scan line (S2n) series connection and is connected to second scanner driver (20)；Often go the picture
Plain unit (50) is by three scan line (EMn) series connection and is connected to the 3rd scanner driver (30)；
Each scan line (S1n, S2n, EMn) is electrically connected with separate mode switching unit (70), and the pattern turns
Change the level that unit (70) is used to adjust each scan line (S1n, S2n, EMn)；The mode switching unit (70) is included extremely
A few P-type TFT, the source electrode of the P-type TFT or a pole of drain electrode are electrically connected to each turntable driving
The grid of driving thin film transistor (TFT) in device (10,20,30), another pole is electrically connected to fixed low level, the P-type TFT
Grid be electrically connected to external control signal (RESET).
9. Organnic electroluminescent device according to claim 8, it is characterised in that in first scanner driver (10)
The driving thin film transistor (TFT) source electrode or drain electrode be electrically connected to the output end of first scan line (S1n)；Described second
The source electrode of the driving thin film transistor (TFT) in scanner driver (20) or drain electrode are electrically connected to second scan line (S2n)
Output end；The source electrode of the driving thin film transistor (TFT) in 3rd scanner driver (30) or drain electrode are electrically connected to described
The output end of three scan line (EMn).
10. Organnic electroluminescent device according to claim 9, it is characterised in that first scanner driver (10)
The array both sides of the pixel cell (50) formation are separately positioned on the 3rd scanner driver (30)；Two described second
Scanner driver (20) is arranged on the picture with first scanner driver (10), the 3rd scanner driver (30) respectively
The array homonymy that plain unit (50) is formed.
11. Organnic electroluminescent device according to claim 10, it is characterised in that further comprise the first power supply
(ELVDD), second source (ELVSS).
12. the Organnic electroluminescent device according to claim 11, it is characterised in that the fixed low level is -7~-
10V, fixed high level is 7~10V.
13. the Organnic electroluminescent device according to claim 12, it is characterised in that the external control signal (RESET)
Direct current high level is set to, the Organnic electroluminescent device is display pattern；The direct current high level is more than or equal to institute
State fixed high level.
14. the Organnic electroluminescent device according to claim 12, it is characterised in that the external control signal (RESET)
Direct current low level is set to, the Organnic electroluminescent device is light illumination mode；The direct current low level is less than or equal to institute
State fixed low level.
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| CN201410667431.3A CN104361861B (en) | 2014-11-20 | 2014-11-20 | A kind of Organnic electroluminescent device |
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| CN201410667431.3A CN104361861B (en) | 2014-11-20 | 2014-11-20 | A kind of Organnic electroluminescent device |
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| CN104361861B true CN104361861B (en) | 2017-10-10 |
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| CN105633122A (en) * | 2016-01-13 | 2016-06-01 | 深圳市华星光电技术有限公司 | Display device |
| CN108766360B (en) | 2018-05-23 | 2020-04-10 | 京东方科技集团股份有限公司 | Display panel driving method and display device |
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|---|---|---|---|---|
| EP1879171A1 (en) * | 2006-07-10 | 2008-01-16 | THOMSON Licensing | Organic electroluminescent display |
| CN101236736A (en) * | 2008-02-29 | 2008-08-06 | 上海广电光电子有限公司 | LCD device and drive method for second gate line |
| CN102622978A (en) * | 2012-02-15 | 2012-08-01 | 深圳市华星光电技术有限公司 | Method for implementing liquid crystal display with two operation modes |
| CN104008726A (en) * | 2014-05-20 | 2014-08-27 | 华南理工大学 | Pixel circuit of active organic electroluminescence displayer and driving method of pixel circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100898675B1 (en) * | 2007-04-19 | 2009-05-22 | 삼성모바일디스플레이주식회사 | Organic Light Emitting Display, Display for Multi Function Keypad Having the Same And Driving Method thereof |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1879171A1 (en) * | 2006-07-10 | 2008-01-16 | THOMSON Licensing | Organic electroluminescent display |
| CN101236736A (en) * | 2008-02-29 | 2008-08-06 | 上海广电光电子有限公司 | LCD device and drive method for second gate line |
| CN102622978A (en) * | 2012-02-15 | 2012-08-01 | 深圳市华星光电技术有限公司 | Method for implementing liquid crystal display with two operation modes |
| CN104008726A (en) * | 2014-05-20 | 2014-08-27 | 华南理工大学 | Pixel circuit of active organic electroluminescence displayer and driving method of pixel circuit |
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