CN1568111A - Organic Electroluminescent Display - Google Patents
Organic Electroluminescent Display Download PDFInfo
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- CN1568111A CN1568111A CN 03141039 CN03141039A CN1568111A CN 1568111 A CN1568111 A CN 1568111A CN 03141039 CN03141039 CN 03141039 CN 03141039 A CN03141039 A CN 03141039A CN 1568111 A CN1568111 A CN 1568111A
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- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims 1
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- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
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- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical group [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
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- IBHBKWKFFTZAHE-UHFFFAOYSA-N n-[4-[4-(n-naphthalen-1-ylanilino)phenyl]phenyl]-n-phenylnaphthalen-1-amine Chemical group C1=CC=CC=C1N(C=1C2=CC=CC=C2C=CC=1)C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=C1 IBHBKWKFFTZAHE-UHFFFAOYSA-N 0.000 description 1
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- Electroluminescent Light Sources (AREA)
Abstract
The present invention relates to an organic electroluminescent display, and more particularly, to an organic electroluminescent display having an insulating layer. The organic electroluminescent display comprises a transparent substrate, a first electrode, an organic electroluminescent layer, a second electrode and an isolation layer. The isolation layer can not only prevent short circuit caused by too close or contact of the first electrode and the second electrode, but also avoid the defect of the organic electroluminescent display picture caused by the fact that the whole pixel can not be driven. Meanwhile, the pixels with the short circuit can be repaired to have the same luminous capability (such as efficiency, brightness, color purity and the like) as the adjacent pixels without defects, thereby increasing the yield of the organic electroluminescent display.
Description
Technical field
The present invention relates to a kind of display of organic electroluminescence, particularly relate to a kind of display of organic electroluminescence with isolation layer.
Background technology
Organic electroluminescence (field cause or electricity swash) active display with its self-luminous, no visual angle, power saving, advantages such as processing procedure is easy, cost is low, high answer speed and full-colorization, make it have great application potential, become follow-on flat-panel screens.
As shown in Figure 1, display of organic electroluminescence 3 mainly is made up of a transparency carrier 31, a transparent anode 32, an organic electro luminescent layer 33 and a negative electrode 34.When imposing a direct current voltage in display of organic electroluminescence 3, the hole is injected by transparent anode 32, and electronics is injected by negative electrode 34 simultaneously.Because potential difference that extra electric field caused, make carrier in organic electro luminescent layer 33, move to meet and produce combination again, part combines the energy of being emitted again by electronics and hole and light emitting molecule can be excited, and excited state molecule gives off energy with the form of light.
Yet, shown in Fig. 2 a, in the processing procedure of display of organic electroluminescence 3, control the environment cleanliness of dust free room howsoever, always having a spot of impurity 4 (as bubble or particulate) falls in the display of organic electroluminescence 3, make when forming negative electrode 34, cause these negative electrode 34 contacts or essence to contact this transparent anode 32, and then cause the essence short circuit of display.In addition, shown in Fig. 2 b, spend when big, when for example on transparent anode 32 surfaces, being formed with the tip, also might produce the situation of essence short circuit when the unevenness on transparent anode 32 surfaces.With regard to above-mentioned two kinds of situations, because electric current can flow through via short circuit place, make whole pixel to be driven, and then cause the defective of display of organic electroluminescence picture, lower the yield of display of organic electroluminescence, because the defective of a few pixels exists and will cause whole display of organic electroluminescence to discard, eliminate in the display.
Summary of the invention
From the above, purpose of the present invention provides a kind of display of organic electroluminescence with isolation layer and inpainted pixels defective.
For reaching above-mentioned purpose, the invention provides a kind of display of organic electroluminescence, comprise a transparency carrier, one first electrode, an organic electro luminescent layer, one second electrode and an isolation layer.Wherein, first electrode is formed on the transparency carrier; Organic electro luminescent layer is formed on first electrode; Second electrode is formed on the organic electro luminescent layer; Isolation layer is formed on second electrode, and local the infiltration in the organic electro luminescent layer.
Compared with prior art, a kind of display of organic electroluminescence with isolation layer is provided in the present invention, this display of organic electroluminescence not only can prevent because first electrode and second electrode too near or contact formed short circuit, and then avoid owing to the defective that can't drive the display of organic electroluminescence picture that whole pixel produces.Simultaneously, more can repair pixel with short circuit place, make it have identical luminous power (for example: efficient, brightness and colorimetric purity or the like) with adjacent defect-free pixel, and then the yield of increase display of organic electroluminescence, and do not need because the defective of a few pixels exists in the display, and will cause whole display of organic electroluminescence discarded.
Description of drawings
Fig. 1 is the schematic diagram of the display of organic electroluminescence of prior art.
The schematic diagram of Fig. 2 a and the short circuit of Fig. 2 b display of organic electroluminescence generation essence.
The schematic diagram of the display of organic electroluminescence of Fig. 3 a and Fig. 3 b present embodiment.
Symbol description among the figure
1 display of organic electroluminescence
11 transparency carriers
12 first electrodes
13 organic electro luminescent layer
14 second electrodes
15 isolation layers
2 impurity
3 display of organic electroluminescence
31 transparency carriers
32 transparent anodes
33 organic electro luminescent layer
34 negative electrodes
4 impurity
Embodiment
Hereinafter with reference to relevant drawings, a kind of display of organic electroluminescence according to the embodiment of the invention is described, wherein identical assembly will be illustrated with identical reference marks.
The present invention falls into display of organic electroluminescence because of small amount of impurities in solving prior art, or the unevenness of first electrode surface, and institute causes second electrode to contact or essence contacts the problem of first electrode and then the display essence situation of short circuit that causes.
For a display of organic electroluminescence, it has the pixel that array is arranged, and in embodiments of the invention for convenience of description, below will replace the pixel of whole display of organic electroluminescence with a pixel.
Shown in Fig. 3 a or Fig. 3 b, the invention provides a kind of display of organic electroluminescence 1, comprise a transparency carrier 11, one first electrode 12, an organic electro luminescent layer 13, one second electrode 14 and an isolation layer 15.Wherein, first electrode 12 is formed on the transparency carrier 11; Organic electro luminescent layer 13 is formed on first electrode 12; Second electrode 14 is formed on the organic electro luminescent layer 13; Isolation layer 15 is formed on second electrode 14, and local the infiltration in the organic electro luminescent layer 13.
In addition, first electrode 12 in the present embodiment is formed on the transparency carrier 11 with sputter (sputtering) mode or ion plating (ion plating) mode, the material of this first electrode 12 is a conductive metal oxide, this conductive metal oxide can be tin indium oxide (ITO), indium zinc oxide (IZO) or aluminum zinc oxide (AZO), and its thickness is more than about 500 .
Organic electro luminescent layer 13 can comprise a hole injection layer, a hole transport layer, a luminescent layer, an electron transfer layer and an electron injecting layer.Wherein, the main material of hole injection layer is copper phthalocyanine (CuPc); The material of hole transmission layer is mainly 4,4 '-bis[N-(1-naphthyl)-N-phenylamino] biphenyl (NPB); The material of electron injecting layer is mainly lithium fluoride (LiF); The material of electron transfer layer is mainly tris (8-quinolinato-N1,08)-aluminum (Alq).And organic electro luminescent layer 13 is formed on first electrode 12 with evaporation (evaporation), rotary coating (spin coating), ink-jet (ink jet printing) or printing (printing), and its thickness is about 500 to 3000 .In addition, the light launched of organic electro luminescent layer 13 can be blue light, green glow, ruddiness, white light, other monochromatic light or the colourama that is combined into of monochromatic light.
Then, second electrode 14 is with vapour deposition method, electron beam coating method (E-gun) or sputtering method (sputtering) forms, and its thickness is 500 to 5000 , and material can be aluminium, aluminium/lithium, calcium, magnesium silver alloy or silver.
The isolation layer 15 of present embodiment is formed on second electrode 14, and local the infiltration in the organic electro luminescent layer 13, shown in Fig. 3 a and Fig. 3 b.At this, the material of isolation layer 15 can be the organic material that constitutes organic electroluminescent layer 13, for example: the material of hole injection layer, hole transport layer, luminescent layer, electron transfer layer and electron injecting layer, or have high-resistance inorganic material, as silicon nitride, silica or silicon oxynitride.In addition, when linking with passivation protection layer plated film system (passivation coating system), more available macromolecule is used as the material of isolation layer 15, as fluoride resin, Parylene.
General in the processing procedure of display of organic electroluminescence, because the cleanliness factor deficiency of dust free room production environment, make partial impurities (bubble or particulate) fall in the display of organic electroluminescence, and make when forming second electrode, cause contact of second electrode or essence to contact first electrode, cause the essence short circuit of display, shown in Fig. 2 a of the prior art.If with single pixel, whole pixel can only circulate from the essence short circuit because of electric current, and can't drive whole pixel.
In the present embodiment, the generation type of insulating barrier 15 is in a buffering cavity (bufferchamber) or single cavity (single chamber), imposing a positive voltage and a negative electricity respectively is pressed on first electrode 12 and second electrode 14, because the factor of impurity is contained in display of organic electroluminescence 1 inside, thereby the situation of generation gas explosion, make the organic electro luminescent layer 13 and second electrode 14 form the situation of outside warpage, allow the essence short circuit place formation of display of organic electroluminescence 1 open circuit, further utilize the vacuum evaporation mode to form an isolation layer 15 in the place of opening circuit again, shown in Fig. 3 a.In addition, also can impose a negative electricity and a positive electricity respectively, make display of organic electroluminescence 1 produce gas explosion in first electrode 12 and 14 at second electrode.
Because in the organic electroluminescence assembly making step, it is downward that the substrate film coating face mostly is, when organic electro luminescent layer 13 and second electrode 14 when the warpage situation takes place, if do not form isolation layer 15 in real time in the place of opening circuit, in making step backward, as long as the substrate film coating face has an opportunity to be reversed upwards, second electrode 14 might contact with first electrode 12 once more and form short circuit phenomenon.
Certainly, the generation type of insulating barrier 15 also can not contain oxidation second electrode 14 in the oxygen-containing atmosphere of aqueous vapor in one, forms an oxide layer on the surface of second electrode 14, in order to isolated second electrode 14 and first electrode 12, and then reaches the effect that maintenance is opened circuit.
In addition, the unevenness on first electrode, 12 surfaces is spent when big, also may produce the essence situation of short circuit, shown in Fig. 2 b of the prior art.
In the same manner, applying a positive voltage and a negative electricity is pressed on first electrode 12 and second electrode 14, connected in electrical series apply certain voltage in may produce the electric short circuit fault location during, organic layer approaches or the first electrode protruding tip place is easier to because of current concentration, owing to produce the relation of electric heating, make the tip of the electrode 12 of winning produce the phenomenon of melting, cooperate and become the gas kenel for relatively poor organic electro luminescent layer 13 lamination structures of luminous efficiency produce high thermal evaporation herein, this gas build-up of pressure difference and allow essence short circuit place of display of organic electroluminescence 1 form to open circuit, further utilize the vacuum evaporation mode to form an isolation layer 15 in the place of opening circuit again, shown in Fig. 3 b.Certainly, also can impose a negative electricity and a positive electricity respectively, the tip of first electrode 12 is melted in first electrode 12 and 14 at second electrode.
In present embodiment, the place of opening circuit that is formed with isolation layer 15 in the pixel keeps the dim spot state, yet whole pixel has identical luminous power with the pixel of adjacent no short circuit, comprises efficient, brightness and colorimetric purity, so for the whole image and the moment-less influence of display of organic electroluminescence.
Display of organic electroluminescence provided by the present invention has an isolation layer, and this isolation layer is formed on second electrode, and local the infiltration in the organic electro luminescent layer.Compare with existent technique, display of organic electroluminescence of the present invention can avoid owing to first electrode and second electrode too near or contact the short circuit that forms, prevent that electric current from only flowing through and can't drive whole pixel from short circuit, and then cause the defective of display of organic electroluminescence picture.Simultaneously, the present invention can repair the place that has circuit defect in the display of organic electroluminescence, make it have identical luminous efficiency, brightness and colorimetric purity with the display of organic electroluminescence of no picture element flaw, further increased the process rate of display of organic electroluminescence, and do not needed because of the defective existence and the need of a few pixels in the display whole display of organic electroluminescence is discarded.
Above-mentioned only is illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the described claim scope its equivalent modifications of carrying out or change.
Claims (12)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141039 CN1568111A (en) | 2003-06-16 | 2003-06-16 | Organic Electroluminescent Display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141039 CN1568111A (en) | 2003-06-16 | 2003-06-16 | Organic Electroluminescent Display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1568111A true CN1568111A (en) | 2005-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03141039 Pending CN1568111A (en) | 2003-06-16 | 2003-06-16 | Organic Electroluminescent Display |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101395733B (en) * | 2006-03-03 | 2010-09-29 | 皇家飞利浦电子股份有限公司 | Electroluminescent device |
| CN114521297A (en) * | 2019-10-16 | 2022-05-20 | 富士胶片株式会社 | Piezoelectric thin film and method for manufacturing piezoelectric thin film |
-
2003
- 2003-06-16 CN CN 03141039 patent/CN1568111A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101395733B (en) * | 2006-03-03 | 2010-09-29 | 皇家飞利浦电子股份有限公司 | Electroluminescent device |
| CN114521297A (en) * | 2019-10-16 | 2022-05-20 | 富士胶片株式会社 | Piezoelectric thin film and method for manufacturing piezoelectric thin film |
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