CN1741695A - A wholeclour organic electroluminous display element and panel thereof - Google Patents
A wholeclour organic electroluminous display element and panel thereof Download PDFInfo
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- CN1741695A CN1741695A CNA2004100569625A CN200410056962A CN1741695A CN 1741695 A CN1741695 A CN 1741695A CN A2004100569625 A CNA2004100569625 A CN A2004100569625A CN 200410056962 A CN200410056962 A CN 200410056962A CN 1741695 A CN1741695 A CN 1741695A
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Abstract
An all colored organic electro luminescence display element consists of shared electrode, the first sub pixel organic material layer and the first corresponding electrode, the second sub pixel organic material layer and the second corresponding electrode, the third sub pixel organic material layer and the third corresponding electrode. It is prepared as setting the first sub pixel organic material layer SOML between shared electrode and the first corresponding electrode CE, setting the second and the third SOML in parallel at another side surface of shared electrode and setting the second SOML between shared electrode and the second CE, setting the third SOML between shared electrode and the third CE.
Description
Technical field
The present invention relates to a kind of organic electro-luminescent display unit and panel thereof, particularly relate to a kind of composite colour organic electroluminescent display element and panel thereof.
Background technology
Organic electroluminescent (organic electroluminescence, OEL) display, with multinomial characteristics such as frivolous, high parsing, power saving and the active illuminating of inorganic light-emitting diode of LCD, high answer speeds, be considered to next emerging application technology of flat-panel screens from generation to generation.
Full-color (full color) organic light emitting display mainly can be divided into photochromic conversion and RGB (side byside) ray structure two big classes side by side.Photochromic translation type comprises colorful filter structure and color converting layer structure, colorful filter structure is to use white organic LED, again in conjunction with colored filter to reach full-color effect, its advantage is for can directly use the existing colorized optical filtering chip technology of LCD, must be many when but element is luminous through one deck colored filter, cause luminous efficiency on the low side, the panel power consumption is higher, and cost is higher.The look transformational structure then discloses as the U.S. the 5294870th and No. 6166489 patents, radiothermy long hair optical element (blue, green) adds color converting layer, make blue light or green glow change red to form, blue, green three looks of red light into via the look switching film, the method is comparatively simple on making, yet, the cost of look transformational structure is higher, and the panel power consumption is high, and color saturation is also relatively poor.
At present the most normal mode of using of full-colorization of organic light emitting display is formed single pixel with the sub-pixel of red, blue, green (RGB) three looks, to produce full-color effect side by side as RGB ray structure side by side.This technological merit is that luminous efficiency reaches optimization, and color saturation the best, shortcoming are that the sub-pixel of each color all need be made with the metallic shield location processing procedure of precision, so quite difficult in processing procedure control.Simultaneously, the interval between sub-pixel also will make aperture ratio of pixels reduce.Therefore, No. 453132 publication of the Republic of China (No. 5917280 patent of the U.S.) discloses a kind of stacking-type organic light emitting apparatus, the organic electroluminescent device of storehouse three looks on substrate, and send red, blue, green glow and produce full-color effect with circuit control respectively.But this stack architecture the top need penetrate multi-layered electrode and many group organic material layers with time light that organic illuminating element sent of top, its luminous efficiency can produce decay, and causes the photochromic phenomenon of skew that produces because of microcavity effect (micro-cavity effect).
In addition, the bottom surface of organic electro-luminescent display unit is a metallic diaphragm traditionally, so when practical application, the contrast of organic EL display panel can reduce significantly because of the reflection of external environment light, causes the image identification rate not good.Therefore can adopt optical absorption to cooperate the method for destruction interference to reduce the reflectivity of element, as the U.S. the 6th, 411, No. 019 and the 6th, 545, No. 409 disclosed component structures of patent are to add an interfering layer in organic electro-luminescent display unit, this interfering layer is interval between the electrode and organic material layer of display element, with the absorption ambient light, and make the catoptrical destructive optical interference of generation between the electrode, in order to the reflectivity that reduces element with optical absorption and destruction interference.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of composite colour organic electroluminescent display element and panel thereof, integrate three sub-pixel light emission element to form full-color pixel element, and by structural design, increased the aperture opening ratio of display panel pixel, reduced its reflectivity.
To achieve these goals, the invention provides a kind of composite colour organic electroluminescent display element and panel thereof, this display element comprises shared electrode, the first sub-pixel organic material layer, first counter electrode, the second sub-pixel organic material layer, second counter electrode, the 3rd sub-pixel organic material layer and the 3rd counter electrode.The first sub-pixel organic material layer is disposed between first counter electrode and the shared electrode; The second sub-pixel organic material layer and the 3rd pixel organic material layer are disposed at the opposite side surface of shared electrode side by side, the second sub-pixel organic material layer is disposed between second counter electrode and the shared electrode, and the 3rd sub-pixel organic material layer is disposed between the 3rd counter electrode and the shared electrode.Under identical structural principle, composite colour organic electroluminescent display element structure of the present invention also can be made suitable change.
Thus, under the prerequisite of same pixel area, composite colour organic electroluminescent display element of the present invention compared to prior art side by side with three sub-pixels, the present invention is two sub-pixels and storehouse one sub-pixel side thereon side by side.Therefore, at three sub-pixels side by side in the prior art of mode, the ratio that each sub-pixel area respectively accounts for single pixel is about 1/3, yet, the area of second among the present invention and the 3rd sub-pixel accounts for single pixel and is about 1/2, first sub-pixel area is then close with single pixel, has high aperture opening ratio significantly.On the other hand, if make panel with the metallic shield of identical A/F, full-color pixel wide of the present invention will only be 2/3 of a previous RGB prior art side by side, in other words, than RGB prior art arranged side by side, the present invention reduces into Pixel Dimensions original 2/3 approximately, helps the making of the display floater of high-fineness.
The present invention also comprises the formed display faceplate of full color organic electroluminescence of a plurality of composite colour organic electroluminescent display elements, the composite colour organic electroluminescent element is as pixel, and a plurality of composite colour organic electroluminescent display elements are arranged in rectangular to form display surface, wherein, the composite colour organic electroluminescent element that each composite colour organic electroluminescent display element is adjacent, sub-pixel organic material layer that can be similar and different is adjacent, the 3rd sub-pixel organic material layer that is the second sub-pixel organic material layer of element and adjacent element is adjacent, as shown in Figure 3 and Figure 4, or the second sub-pixel organic material layer of second sub-pixel organic material layer of element and adjacent element is adjacent, as Fig. 5 and shown in Figure 6.
In addition, structure of the present invention also can reduce the composite colour organic electroluminescent display element reflectivity of light to external world, and shared electrode can be used the semi-reflection and semi absorbed layer, with the extraneous light of absorption and reflecting part.And according to different luminous patterns, for example with the side of first counter electrode as emission side, first counter electrode is the high light penetrated bed of visible light, second counter electrode and the 3rd counter electrode then are respectively the high light reflectivity layer.So, can by by the visible light semi-reflection and semi absorbed layer of shared electrode and high light reflectivity layer as the reflectivity key-course.Second counter electrode, the 3rd counter electrode and shared electrode through suitably adjusting, can be produced destructive optical interference,, improve display element image contrast quality to eliminate most of ambient light line reflection.In addition, as with the side of second counter electrode and the 3rd counter electrode as emission side, then first counter electrode is the high light reflectivity layer, second counter electrode and the 3rd counter electrode then are respectively high light penetrated bed, similarly, first counter electrode and shared electrode also can produce destructive optical interference through suitably adjusting, to eliminate most of ambient light line reflection, improve display element image contrast quality.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the invention;
Fig. 2 is the structural representation of second embodiment of the invention;
Fig. 3 is the panel construction schematic diagram of third embodiment of the invention;
Fig. 4 is the panel construction schematic diagram of fourth embodiment of the invention;
Fig. 5 is the panel construction schematic diagram of fifth embodiment of the invention;
Fig. 6 is the panel construction schematic diagram of sixth embodiment of the invention.
Wherein, Reference numeral:
100 composite colour organic electroluminescent display elements
110 shared electrode
111 first sub-pixel organic material layers
121 first counter electrodes
112 second sub-pixel organic material layers
122 second counter electrodes
113 the 3rd sub-pixel organic material layers
123 the 3rd counter electrodes
200 transparency carriers
Embodiment
On actual fabrication, composite colour organic electroluminescent display element of the present invention is carried on transparency carrier, please refer to Fig. 1, and it is the structural representation of first embodiment of the invention.Composite colour organic electroluminescent display element 100 comprises transparency carrier 200, shared electrode 110, the first sub-pixel organic material layer 111, first counter electrode 121, the second sub-pixel organic material layer 112, second counter electrode 122, the 3rd sub-pixel organic material layer 113 and the 3rd counter electrode 123.Transparency carrier carries second counter electrode 122 and the 3rd counter electrode 123, the second sub-pixel organic material layer 112 is disposed on second counter electrode 122 and the 3rd counter electrode 123 with the 3rd pixel organic material layer 113 is corresponding respectively side by side, and shared electrode 110 is disposed at the second sub-pixel organic material layer 112 and the 3rd pixel organic material layer 113 on both; The first sub-pixel organic material layer 111 is disposed on the shared electrode 110, and first counter electrode 121 is disposed on the first sub-pixel organic material layer 111.
Please refer to Fig. 2, it is the structural representation of second embodiment of the invention.Composite colour organic electroluminescent display element 100 comprises transparency carrier 200, shared electrode 110, the first sub-pixel organic material layer 111, first counter electrode 121, the second sub-pixel organic material layer 112, second counter electrode 122, the 3rd sub-pixel organic material layer 113 and the 3rd counter electrode 123.Transparency carrier 200 carryings first counter electrode 121, the first sub-pixel organic material layers 111 are disposed on first counter electrode 121, and shared electrode 110 is disposed on the first sub-pixel organic material layer 111; The second sub-pixel organic material layer 112 and the 3rd pixel organic material layer 113 are disposed on the shared electrode 110 side by side, second counter electrode, 122 corresponding shared electrode 110 are disposed on the second sub-pixel organic material layer 112, and the 3rd counter electrode 123 corresponding shared electrode 110 are disposed on the 3rd sub-pixel organic material layer 113.
A plurality of composite colour organic electroluminescent display elements can be formed display faceplate of full color organic electroluminescence, different relative position configurations when composite colour organic electroluminescent display element of the present invention is incorporated into substrate according to its emission side, it is applied as luminous pattern and following luminous pattern, and display floater may be selected to be active driving or passive type drives.
Please refer to Fig. 3, the panel construction schematic diagram of the 3rd embodiment for being formed with first embodiment of the invention.Its display faceplate of full color organic electroluminescence for following luminous pattern comprises a plurality of composite colour organic electroluminescent display elements 100, composite colour organic electroluminescent element 100 is arranged in rectangular to form display surface, second counter electrode 122 and the 3rd counter electrode 123 of composite colour organic electroluminescent display element 100 are attached on the transparency carrier 200, the second sub-pixel organic material layer 112 and the 3rd pixel organic material layer 113 are side by side, correspondence is disposed on second counter electrode 122 and the 3rd counter electrode 123 respectively, and shared electrode 110 is disposed at the second sub-pixel organic material layer 112 and the 3rd pixel organic material layer 113 on both; The first sub-pixel organic material layer 111 is disposed on the shared electrode 110, and first counter electrode 121 is disposed on the first sub-pixel organic material layer 111.Wherein, the composite colour organic electroluminescent element 100 that each composite colour organic electroluminescent display element 100 is adjacent, connect with different sub-pixel organic material layers, and in the 3rd embodiment, composite colour organic electroluminescent element 100 is provided with the side of second counter electrode 122 and the 3rd counter electrode 123 as emission side, first counter electrode 121 is the high light reflectivity layer, and second counter electrode 122 and 123 of the 3rd counter electrodes are respectively high light penetrated bed.So first counter electrode 121 can be metal electrode, second counter electrode 122 and 123 of the 3rd counter electrodes can be the transparency electrode that is plated on the transparency carrier surface in advance, as tin indium oxide (ITO) electrode, indium zinc oxide (IZO) electrode or thin metal electrode.
On the contrary, display faceplate of full color organic electroluminescence is as desiring to take luminous pattern, then can use general substrate, and make the composite colour organic electroluminescent element side of first counter electrode is set as emission side, first counter electrode is required to be high light penetrated bed, and second counter electrode and the 3rd counter electrode then are respectively the high light reflectivity layer.So first counter electrode can be transparency electrode, as tin indium oxide (ITO) electrode, indium zinc oxide (IZO) electrode or thin metal electrode, second counter electrode and the 3rd counter electrode then can be the metal electrode that is plated on substrate surface in advance.
In addition, please refer to Fig. 4, the panel construction schematic diagram of the 4th embodiment for being formed with second embodiment of the invention.
In addition, the composite colour organic electroluminescent element that each the composite colour organic electroluminescent display element in the display faceplate of full color organic electroluminescence is adjacent, sub-pixel organic material layer that can also be identical connects.Please refer to Fig. 5, the another kind of panel construction schematic diagram of the 5th embodiment for being formed with first embodiment of the invention.The difference of the 3rd embodiment of itself and Fig. 3 is the composite colour organic electroluminescent element 100 that each composite colour organic electroluminescent display element 100 is adjacent, all connect with identical sub-pixel organic material layer, promptly the second sub-pixel organic material layer 112 is connected with the second sub-pixel organic material layer 112 of adjacent element, and the 3rd sub-pixel organic material layer 113 of element opposite side is connected with the 3rd sub-pixel organic material layer 113 of another adjacent element.
In like manner, please refer to Fig. 6, the another kind of panel construction schematic diagram of the 6th embodiment for being formed with second embodiment of the invention.
The advantage of the structure of the 4th embodiment and the 6th embodiment is: compared to the structure of the 3rd embodiment and the 5th embodiment, utilize the metallic shield technology of identical openings of sizes, the structure of the 4th embodiment and the 6th embodiment can obtain the high panel precision of twice.
Wherein, shared electrode of the present invention is a semitransparent electrode, can be made up of metal, alloy or metal oxide.The first sub-pixel organic material layer, the second sub-pixel organic material layer and the 3rd sub-pixel organic material layer respectively comprise the appropriate combination of electric hole implanted layer, electric hole transfer layer, luminescent layer, electron transfer layer, electron injecting layer.And the first sub-pixel organic material layer, the second sub-pixel organic material layer and the 3rd sub-pixel organic material layer respectively send ruddiness, green glow and blue light a kind of not homochromy light wherein.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (26)
1. composite colour organic electroluminescent display element is characterized in that it includes:
One shares electrode;
One first sub-pixel organic material layer is disposed at the surface of this shared electrode;
One first counter electrode is to disposing this first sub-pixel organic material layer between the shared electrode;
One second sub-pixel organic material layer and one the 3rd pixel organic material layer are disposed at the opposite side surface of this shared electrode side by side;
One second counter electrode is to disposing this second sub-pixel organic material layer between the shared electrode; And
One the 3rd counter electrode is to disposing the 3rd sub-pixel organic material layer between the shared electrode.
2. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein this shared electrode is a semitransparent electrode.
3. composite colour organic electroluminescent display element according to claim 1 is characterized in that wherein the material of this shared electrode is selected from metal, alloy and metal oxide.
4. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein also comprises a transparency carrier, carries this first counter electrode.
5. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein also comprises a transparency carrier, carries this second counter electrode and the 3rd counter electrode.
6. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein this first counter electrode is the high light reflectivity layer, and this second counter electrode and the 3rd counter electrode are high light penetrated bed.
7. composite colour organic electroluminescent display element according to claim 6 is characterized in that, wherein this first counter electrode is a metal electrode, and this second counter electrode and the 3rd counter electrode are transparency electrode.
8. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein this first counter electrode is high light penetrated bed, and this second counter electrode and the 3rd counter electrode are the high light reflectivity layer.
9. composite colour organic electroluminescent display element according to claim 8 is characterized in that, wherein this first counter electrode is a transparency electrode, and this second counter electrode and the 3rd counter electrode are metal electrode.
10. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein this first sub-pixel organic material layer comprises the combination of electric hole implanted layer, electric hole transfer layer, luminescent layer, electron transfer layer, electron injecting layer.
11. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein this second sub-pixel organic material layer comprises the combination of electric hole implanted layer, electric hole transfer layer, luminescent layer, electron transfer layer, electron injecting layer.
12. composite colour organic electroluminescent display element according to claim 1 is characterized in that, wherein the 3rd sub-pixel organic material layer comprises the combination of electric hole implanted layer, electric hole transfer layer, luminescent layer, electron transfer layer, electron injecting layer.
13. composite colour organic electroluminescent display element according to claim 1, it is characterized in that wherein this first sub-pixel organic material layer, this second sub-pixel organic material layer and the 3rd sub-pixel organic material layer respectively send ruddiness, green glow and blue light a kind of not homochromy light wherein.
14. a display faceplate of full color organic electroluminescence is characterized in that, includes:
A plurality of composite colour organic electroluminescent display elements, as a plurality of pixels, and a plurality of this pixel is with the rectangular display surface that rearranges, and each element includes:
One shares electrode;
One first sub-pixel organic material layer is disposed at the surface of this shared electrode;
One first counter electrode is to disposing this first sub-pixel organic material layer between the shared electrode;
One second sub-pixel organic material layer and one the 3rd pixel organic material layer are disposed at the opposite side surface of this shared electrode side by side;
One second counter electrode is to disposing this second sub-pixel organic material layer between the shared electrode; And
One the 3rd counter electrode is to disposing the 3rd sub-pixel organic material layer between the shared electrode.
15. display faceplate of full color organic electroluminescence according to claim 14, it is characterized in that, wherein this second sub-pixel organic material layer of each this composite colour organic electroluminescent display element is connected in this second sub-pixel organic material layer of this composite colour organic electroluminescent element of its adjacency, and the 3rd sub-pixel organic material layer of each this composite colour organic electroluminescent display element is connected in the 3rd sub-pixel organic material layer of this composite colour organic electroluminescent element of its adjacency.
16. display faceplate of full color organic electroluminescence according to claim 14, it is characterized in that, wherein this second sub-pixel organic material layer of each this composite colour organic electroluminescent display element is connected in the 3rd sub-pixel organic material layer of this composite colour organic electroluminescent element of its adjacency, and the 3rd sub-pixel organic material layer of each this composite colour organic electroluminescent display element is connected in this second sub-pixel organic material layer of this composite colour organic electroluminescent element of its adjacency.
17. display faceplate of full color organic electroluminescence according to claim 14 is characterized in that, wherein this shared electrode is a semitransparent electrode.
18. display faceplate of full color organic electroluminescence according to claim 14 is characterized in that, wherein the material of this shared electrode is selected from metal, alloy and metal oxide.
19. display faceplate of full color organic electroluminescence according to claim 14 is characterized in that, wherein this first counter electrode is the high light reflectivity layer, and this second counter electrode and the 3rd counter electrode are high light penetrated bed.
20. display faceplate of full color organic electroluminescence according to claim 19 is characterized in that, wherein this first counter electrode is a metal electrode, and this second counter electrode and the 3rd counter electrode are transparency electrode.
21. display faceplate of full color organic electroluminescence according to claim 14 is characterized in that, wherein this first counter electrode is high light penetrated bed, and this second counter electrode and the 3rd counter electrode are the high light reflectivity layer.
22. display faceplate of full color organic electroluminescence according to claim 21 is characterized in that, wherein this first counter electrode is a transparency electrode, and this second counter electrode and the 3rd counter electrode are metal electrode.
23. display faceplate of full color organic electroluminescence according to claim 14 is characterized in that, wherein this first sub-pixel organic material layer comprises the combination of electric hole implanted layer, electric hole transfer layer, luminescent layer, electron transfer layer, electron injecting layer.
24. display faceplate of full color organic electroluminescence according to claim 14 is characterized in that, wherein this second sub-pixel organic material layer comprises the combination of electric hole implanted layer, electric hole transfer layer, luminescent layer, electron transfer layer, electron injecting layer.
25. display faceplate of full color organic electroluminescence according to claim 14 is characterized in that, wherein the 3rd sub-pixel organic material layer comprises the combination of electric hole implanted layer, electric hole transfer layer, luminescent layer, electron transfer layer, electron injecting layer.
26. display faceplate of full color organic electroluminescence according to claim 14, it is characterized in that wherein this first sub-pixel organic material layer, this second sub-pixel organic material layer and the 3rd sub-pixel organic material layer respectively send ruddiness, green glow and blue light a kind of not homochromy light wherein.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100569625A CN100414711C (en) | 2004-08-23 | 2004-08-23 | A wholeclour organic electroluminous display element and panel thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100569625A CN100414711C (en) | 2004-08-23 | 2004-08-23 | A wholeclour organic electroluminous display element and panel thereof |
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| CN1741695A true CN1741695A (en) | 2006-03-01 |
| CN100414711C CN100414711C (en) | 2008-08-27 |
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| US5703436A (en) * | 1994-12-13 | 1997-12-30 | The Trustees Of Princeton University | Transparent contacts for organic devices |
| US5917280A (en) * | 1997-02-03 | 1999-06-29 | The Trustees Of Princeton University | Stacked organic light emitting devices |
| US6844957B2 (en) * | 2000-11-29 | 2005-01-18 | International Business Machines Corporation | Three level stacked reflective display |
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