CN1464766A - Composite colour organic electroluminescent display device - Google Patents
Composite colour organic electroluminescent display device Download PDFInfo
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- CN1464766A CN1464766A CN 02124916 CN02124916A CN1464766A CN 1464766 A CN1464766 A CN 1464766A CN 02124916 CN02124916 CN 02124916 CN 02124916 A CN02124916 A CN 02124916A CN 1464766 A CN1464766 A CN 1464766A
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Abstract
An all colored organic electroluminescent display device comprising a substrate, a first electrode layer (cathode) at one side of the substrate, a second electrode layer (anode) clamped in the first electrode layer (cathode) and the substrate, an organic electroluminescent layer clamped between the second electrode layer (anode) and the first electrode layer (cathode), and a fluorescent powder color converting layer clamped between the second electrode layer (anode) and the substrate, wherein the organic electroluminescent layer emits the radiation light whose wavelength range covers blue light after current excitation, and the fluorescent powder color converting layer transforms the blue light into red light or green light. The invention also provides a process for making the organic electroluminescent display device.
Description
Technical field
The invention relates to a kind of flat display apparatus, especially refer to a kind of colored organic electroluminescence display device and method of manufacturing same that shows that is applicable to.
Background technology
The full-colorization technology of present organic light emitting display, more common person approximately slightly " three primary colors luminescent layer method " reaches " colored filter method " two kinds." three primary colors luminescent layer method " is to adopt red, green, blue independently organic luminous layer is as luminous pixel separately, and " colored filter method " then is as luminous pixel with white organic light emitting layer collocation colored filter.The three primary colors luminescent layer method one of known technology as shown in Figure 1.This technology is to form on substrate 110 after the anode, distinguishes red organic luminorphor 110 on the evaporation, green organic luminorphor 120 and blue organic luminorphor 130 again.Negative electrode and carry out suitable processing on the evaporation more afterwards to form organic light emitting display.Three primary colors luminescent layer technology is to utilize the active illuminating characteristic of organic light emitting display itself and produce different colors, does not therefore need the extra toning filtering assembly that uses.The right independently technical sophistication of the luminous pixel of three primary colors, the degree of difficulty height made separately.When the product of the big picture of exploitation, high-res, must cooperate the vapour deposition method of high accurancy and precision, and be not easy volume production.In addition, this technology still is subject to good micromolecule ruddiness at present the exciting light material, and the source of raw material is subjected to the cover restriction.And the three primary colors luminescent material luminous efficiency drop is too big each other, uniformity of luminance is little, when display frame being carried out the luminenscence homogenization processing, need very complicated huge drive circuit, can cause the difficulty on whole film layer structure coupling and the drives during display frame homogenizing.
And the colored filter method of known technology as shown in Figure 2, this technology is to pull printing one deck colored filter 210 on 200 in base, be equipped with a white organic mixolimnio 220 on this colored filter, this white organic mixolimnio mainly is made up of with blue organic luminorphor 224 the colour organic luminous body 222 of tangerine.Present technique mainly is to utilize, and the blue light that for example blue organic luminorphor 230 is sent mixes the formation white light with the tangerine light that the colour organic luminous body 220 of tangerine is sent, and produces various colors via colored filter 210 again.But it is not to be mixed by three primary colors that the disadvantage of this technology is formed white light, but utilize the white light that blendes together as complementary colours blue and the tangerine look, so the white light frequency spectrum is not an equally distributed broader frequency spectrum, acromion can appear on the frequency spectrum, purity is not very desirable, can't satisfy the requirement of high-quality full-color display color standard.
Moreover the novel full-color Organic Light Emitting Diode technology of proposing was also once arranged, and the Organic Light Emitting Diode of utilization emission ultraviolet light, purple light excited pre-aligned good red, blue, the green tri-color phosphor that is produced is to produce full-color effect.The ultraviolet light that right this method is produced can produce the effect of deterioration and reduce useful life for employed organic functional material in the organic light-emitting diode element because energy is stronger; And ultraviolet light is also absorbed by the other materials in its component structure easily, makes light conversion efficiency reduce; If having the ultraviolet light of the remnants that can't change fully to overflow more can damage human eye.
Therefore, still need at present a kind of new full-color technology on the market, can avoid above-mentioned processing procedure problem, can reach color resolution height simultaneously, luminous evenly and purity desirable, and can be applicable to the composite colour organic electroluminescent display device of large scale screen.
Summary of the invention
Main purpose of the present invention is to provide a kind of composite colour organic electroluminescent display device, can homogenizing the luminous efficiency of each color, improve luminance purity, improve the effect of color resolution, luminescent material is easy to obtain, and can be applicable to the large scale screen.
Another object of the present invention is to provide the manufacture method of organic electroluminescence display device and method of manufacturing same, must not use red luminous organic material, and can improve the photochromic purity of white.
For achieving the above object, composite colour organic electroluminescent display device provided by the invention comprises:
One substrate;
One first electrode layer (negative electrode) is positioned at the side that this base is pulled;
One the second electrode lay (anode) is folded between this first electrode layer (negative electrode) and this substrate;
At least one organic electro luminescent layer is folded between this second electrode lay (anode) and this first electrode layer (negative electrode); And
One phosphor powder body colour conversion layer is folded between this second utmost point layer (anode) and this substrate;
Wherein this organic electro luminescent layer is sent the light of main wavelength between the blue light wavelength scope after electric current excites;
This phosphor powder body colour conversion layer is that this organic electro luminescent layer is excited the blue light that is sent through electric current, is converted to ruddiness or green glow, the independent pixel information of red to produce, blue, green each color.
Also comprise a separator, this separator is folded between this second electrode lay (anode) and this phosphor powder body colour conversion layer, and this separator is folded between this second electrode lay and this phosphor powder body colour conversion layer, to protect this phosphor powder body colour conversion layer.
Also comprise a protective layer, this protective layer is positioned at the surface of this first electrode layer (negative electrode) to protect this first electrode layer (negative electrode), this protective layer such as Aromatic Polyimide, Parylene or TeflonCopolymer.
Also comprise at least one dark-coloured extinction matrix frame, this dead color extinction matrix frame is positioned at the pixel periphery of this phosphor powder body colour conversion layer in case leak-stopping light.
Wherein this second electrode lay (anode) is a transparent electrode layer.
Wherein this second electrode lay (anode) is indium tin oxide (ITO).
Wherein this separator is transparent epoxy resin, pi resin, silicone or inorganic transparent adhesive such as SiO
2Or TiO
2
Wherein this organic electro luminescent layer is macromolecule organic electro luminescent layer or micromolecule organic electro luminescent layer, and being used to produce short wavelength's blue light is ruddiness and green glow to excite phosphor powder body colour conversion layer.
Wherein this fluorescent powder is the first powder of inorganic firefly.
Wherein this first electrode layer (negative electrode) is a plurality of strip shaped electric poles, and this second electrode lay (anode) is a plurality of strip shaped electric poles, and this first electrode layer (negative electrode) is staggered with this second electrode lay (anode).
The manufacture method of composite colour organic electroluminescent display device provided by the invention comprises the steps:
On a substrate, form a phosphor powder body colour conversion layer;
On this phosphor powder body colour conversion layer, form a second electrode lay (anode) layer;
Go up at least one organic electro luminescent layer of formation in this second electrode lay (anode);
And
On this organic electro luminescent layer, form one first electrode layer (negative electrode);
Wherein, this organic electro luminescent layer is sent the light of main wavelength between the wave-length coverage of blue light after electric current excites;
This phosphor powder body colour conversion layer excites the blue light that is sent with this organic electro luminescent layer through electric current, is converted to ruddiness or green glow, independent pixel information red, blue to produce, green each color.
It also is contained in after phosphor powder body colour conversion layer forms, and forms a transparent spacer layer on this phosphor powder body colour conversion layer, and this transparent spacer layer is folded between this second electrode lay and this phosphor powder body colour conversion layer, to protect this phosphor powder body colour conversion layer.
It also is contained in after this phosphor powder body colour conversion layer forms, and forms dark-coloured extinction matrix frame on this substrate, and this dead color extinction matrix frame is positioned at the pixel periphery of this phosphor powder body colour conversion layer in case leak-stopping light.
It also is contained in before this separator forms, and forms dark-coloured extinction matrix frame on this substrate, and this dead color extinction matrix frame is positioned at the pixel periphery of this phosphor powder body colour conversion layer in case leak-stopping light.
Wherein this fluorescent powder conversion layer forms with sedimentation.
Wherein this second electrode lay (anode) is indium tin oxide (ITO).
Wherein this separator is transparent epoxy resin, pi resin, silicone or inorganic transparent adhesive such as SiO
2Or TiO
2
Wherein this organic electro luminescent layer is macromolecule organic electro luminescent layer or micromolecule organic electric-excitation luminescent layer.
Wherein this fluorescent powder is inorganic fluorescent powder.
Wherein this first electrode layer (negative electrode) is a plurality of strip shaped electric poles, and this second electrode lay (anode) is a plurality of strip shaped electric poles, and this first electrode layer (negative electrode) is staggered with this second electrode lay (anode).
Description of drawings
Fig. 1 is the schematic diagram of known " three primary colors luminescent layer method ".
Fig. 2 is the schematic diagram of known " colored filter method ".
Fig. 3 is the schematic diagram of a preferable example of organic electroluminescence display device and method of manufacturing same of the present invention.
Embodiment
The substrate of organic electroluminescence display device and method of manufacturing same of the present invention can be any transparency carrier commonly used, is preferably soda-lime glass, Pyrex, plastic cement or silicon wafer.The material of anode (first electrode) can be any electrode material commonly used, is preferably InSnO
3, SnO
2, doping ZnO In
2O
3, CdSnO or antimony.The material of negative electrode (second electrode) can be any electrode material commonly used, is preferably MgAg, aluminium, diamond, class diamond or calcium.The organic electro luminescent layer of organic electroluminescence display device and method of manufacturing same of the present invention can be for single layer structure or optionally is the structure of multilayer.This multilayer organic electro luminescent layer can be optionally has electric hole implanted layer, electric hole transport layer, electroluminescence layer, the organic electro luminescent layer of electron transfer layer or electron injecting layer.The number or the shape of first electrode of the present invention and second electrode are unrestricted, and being preferably this first electrode layer (negative electrode) is a plurality of strip shaped electric poles, and this second electrode lay (anode) is a plurality of strip shaped electric poles; And arrangement mode is unrestricted, and it is staggered with this second electrode lay (anode) to be preferably this first electrode layer (negative electrode).
The preferable separator that comprises of the present invention; this separator is folded between this second electrode lay (anode) and this phosphor powder body colour conversion layer; and this separator is folded between this second electrode lay and this phosphor powder body colour conversion layer, to protect this phosphor powder body colour conversion layer.And can further comprise a protective layer, this protective layer is positioned at the surface of this first electrode layer (negative electrode) to protect this first electrode layer (negative electrode).The dark-coloured extinction matrix frame of a shading be can optionally form between the phosphor powder body colour conversion layer of the present invention or between phosphor powder body colour conversion layer and substrate,, light leak and the image sharpening that increases the pixel edge prevented in order to reduce the interference of surround lighting.
Color converting layer of the present invention is a thin layer of being made up of fluorescent powder and adhesion polymer, and it is in order to excite the light that is sent to be converted to ruddiness through electric current organic electro luminescent layer, and green glow or blue light are to produce color.Whole color converting layer structure is coated with or the moulding of dry type depositional mode with wet type after evenly mixing by the fluorescent powder that can absorb short wavelength's blue light.The alternative condition of this fluorescent powder be preferably can be anti-high-strength light according to, can with organic blueness, white light or UV-light luminous element blend together ruddiness, green glow or blue light, good to temperature stability, and good to the environment weatherability.Adhesion polymer of the present invention is preferably transparent epoxy resin, pi resin, urea resin, silicone or inorganic transparent adhesive.The preferable SiO that can be of inorganic transparent adhesive
2Or TiO
2Wherein this transparent epoxy resin is preferably and is applicable to the wet type coating process, and this transparent adhesive then is applicable to the dry type deposition manufacture process.Ratio between this fluorescent powder and the adhesion polymer can be according to the luminous efficiency adjustment of each color, to reach the luminous efficiency balance.The distribution of fluorescent powder can be controlled by the structure of adjusting color converting layer, formation temperature, viscosity, crystal structure and the particle size distribution of fluorescent powder in the color converting layer.Organic electroluminescence display device and method of manufacturing same of the present invention; can optionally also comprise a separator; this separator is folded between this second electrode lay (anode) and this color converting layer, and this separator is folded between this second electrode lay (anode) and this substrate, to protect this color converting layer.Insolated layer materials of the present invention is unrestricted, is preferably transparent epoxy resin, pi resin, urea resin, silicone or inorganic transparent adhesive.The preferable SiO that can be of inorganic transparent adhesive
2Or TiO
2Wherein this transparent epoxy resin is preferably and is applicable to the wet type coating process, and this transparent adhesive then is applicable to the dry type deposition manufacture process.
Fluorescent powder kind used in the present invention is unrestricted, is preferably the Y that is mixed with rare earth element
3Al
5O
12(YAG) fluorescent powder.Because element can replace part Y in lattice middle rare earth family, therefore form Y
2.9R
0.1Al
5O
12(R is a rare earth element).And YAG is a thermally stable transparent material, after adding different rare earth elements, can send the light of different colours.For example add Tb in Y
3Al
5O
12(YAG) can green light, add the Ce light that then can turn to be yellow.
The preparation method of above-mentioned color converting layer can be divided into wet process and dry process dual mode.One of wet process method is with directly fusion behind the weighing measurement of required fluorescent powder end, adds appropriate solvent and mixes with epoxy resin; The another way of its wet process for utilize collosol and gel or coprecipitation method with fluorescent powder end after solution atom level state mixes down, mix with epoxy resin again.Can utilize rotary coating or printing coating method afterwards; be spun on separator or the luminescent panel; toasted again afterwards to remove and desolvated and moisture; finish the white color conversion layer behind coating optionally or the deposition layer protective layer again; be the former grade color converting layer technology of microcosmic fusion single layer white light of giving, to overcome the too big or bad problem of luminous efficiency of prior art luminous efficiency drop.
Dry process then be with behind the weighing measurement of required fluorescent powder end directly fusion or use collosol and gel or coprecipitation method with fluorescent powder end after solution atom level state mixes down, again with transparent adhesive such as SiO
2, TiO
2Mix.Must consider the deposition rate difference of different colours fluorescent powder during deposition; carry out evaporation, sputter or ion beam depositing; directly on separator or luminescent panel, form a white color conversion layer, and can in same processing procedure, deposit another protective layer, finish the white color conversion layer structure.
Organic, electro-optical element display of the present invention is preferably the display floater with red, green and blue plural light emitting pixel (pixel) array, with show image; Organic, electro-optical element display of the present invention can certainly be the display floater of monochromatic plural light emitting pixel (pixel) array because of needs.The organic EL display panel of manufacturing of the present invention can be applicable to purposes or the equipment that any image, picture, symbol and literal show, is preferably display panel, signal machine, communication apparatus, phone, light fixture, car light, conversation type e-book, the micro-display (microdisplay) of TV, computer, printer, screen, transport carrier (vehicle), demonstration, personal digital assistant (personaldigital assistant), game machine (game), the demonstration of aircraft (airplane) equipment and the demonstration of recreation eyeshade etc. of fishing (fishing) equipment.
For more understanding technology contents of the present invention, be described as follows especially exemplified by the organic electroluminescence display device and method of manufacturing same preferred embodiment.
Embodiment 1 organic electroluminescence display device and method of manufacturing same
Please refer to Fig. 3 of the present invention, Fig. 3 is the schematic diagram of a preferable example of organic electroluminescence display device and method of manufacturing same of the present invention.Organic electroluminescence display device and method of manufacturing same of the present invention is a passive type organic electroluminescence display device and method of manufacturing same, comprises: a substrate 300; One negative electrode (first electrode layer) 352; One anode (the second electrode lay) 354; One blue organic electroluminescent layer 350; And a phosphor powder body colour conversion layer 310, this phosphor powder body colour conversion layer 310 comprises a plurality of red phosphor bodies 314, green fluorescent body 316 and transparent pixel body 318; Dark-coloured extinction cover net 312; Separator (overcoating) 340; An insulation 360 and a cathodic protection layer 370.
Wherein the surface of substrate 300 is to form dark-coloured extinction cover net and a plurality of red phosphor body 314, green fluorescent body 316 and transparent pixel body 318 earlier, and this phosphor powder body colour conversion layer excites the blue light that is sent to be converted to ruddiness or green glow through electric current this organic electro luminescent layer; So each phosphor body 314,316 or 318 corresponding pixel.Alleged herein pixel refers to by negative electrode (first electrode layer) 352, and anode (the second electrode lay) 354 and organic electro luminescent layer 350 constitute.The organic electro luminescent layer of this preferable example can optionally be the structure of multilayer, is the organic electro luminescent layer of individual layer in this preferable example.This dead color extinction matrix frame 312 is the light shield of a black, and it is in order to cover the scattered light at pixel edge.This dead color extinction matrix frame 312 encloses the scope of plain edge with the definition pixel around this.Then form a separator (overcoating) 340 on black light-absorbing cover net 312 and this phosphor powder body colour conversion layer 310, this separator (overcoating) is in order to the dark-coloured extinction cover net of protection black and this filter.On the separator (overcoating) 340, be provided with a strip transparent indium-tin-oxide layer (ITO layer) 354.Between this indium tin oxide layer (ITO layer) 354, optionally be formed with parallel insulation and isolate, when forming, separate the usefulness of cathode substance scope as cathode substance between picture element.On indium tin oxide layer (ITO layer), evaporation or sputter organic luminous layer 350 are in order to send the light in specific wavelength field.In this preferable example, this organic luminous layer 350 is for sending the light that wavelength is a blue wavelength region after exciting by electric current.
The manufacturing of the organic electroluminescence display device and method of manufacturing same of this preferable example is to prepare a fluorescent powder earlier, to form the usefulness of a phosphor layers on substrate.This fluorescent powder is with oxalic acid-triethylamine coprecipitation method preparation.This preparation method is rough as follows:
This preparation example prepares YAG fluorescent powder with oxalic acid-triethylamine coprecipitation method.Will other R (NO
3)
3(R is La, Ce, Pr, Sm, Tb, Ho, Tm, or Yb), Y (NO
3)
3With Al (NO
3)
3Than mixing, it is dissolved in 25 ml deionized water according to metering fully, adds 15 milliliters of triethylamines and 10 milliliters of 1.2M oxalic acid simultaneously, the pH value is about 10.22 in the preparation, and this moment, adularescent colloidal precipitation produced.The filtration of bleeding after the stirred for several minute after the filtration, is put into oven for drying with white powder, takes out after about 12 hours.Afterwards white powder is put into high temperature furnace and burnt and to separate, burn the carrying out separated and at first stopped 1 hour in 300 ℃, be warming up to 500 ℃ thereupon again and stopped 1 hour, stopped 24 hours in 1000 ℃ at last, get final product to such an extent that be mixed with the fluorescent powder of rare earth element after cooling.The short residual light characteristic of the about 120n sec of the fluorescent powder tool that makes can be applicable on the fast element of answer speed.
Present embodiment is according to the luminous source of difference prepared fluorescent powder composition such as following table 1:
Table 1
| The excitaton source optical source wavelength | Fluorescent powder composition |
| 470nm (blue light) | YAG:Ce 3+(yellow) |
| 420-473nm (blue/UV) | YBO 3:Ce 3+，Tb 3+(green)/SrGa 2S 4:Eu 2+(blueness)/Y 2O 2S:Eu 3+，Bi 3+(redness) |
| 370nm (ultraviolet light) | Ca 8Mg(SiO 4) 4Cl 2:Eu 2+，Mn 2+(green) 20-50%/Y 2O 3:Eu 3+，Bi 3+(redness) 40-80%/Ca 5(PO 4) 3Cl:Eu 2+(blueness) or BaMg 2Al 16O 27:Eu 2+(blueness) 5-25% |
| 460nm (blue light) | SrGa 2O 4:Eu 2+(green)/CaS:Eu (redness) |
After treating that the preparation of fluorescent powder layer is finished, the preparation of carrying out the white color conversion layer that continues.The method of its preparation is rough, and to be prepared as follows example 2 and 3 described:
Preparation-the wet process of preparation example 2 color converting layers
The given dose ratio of this fluorescent material by the principle modulation of this long emission wavelength frequency spectrum according to the different three primary colors fluorescent material of balance luminous efficiency, is used sol-gal process, mixes under solution atom level state with epoxy resin.
Preparation-the dry process of preparation example 3 color converting layers
In dry process, evenly fusion behind the direct weighing measurement of fluorescent material and transparent medium, make target, or with sol-gel, or, carry out evaporation, sputter or ion beam depositing with the target that coprecipitation method is made, on Organic Light Emitting Diode, form complanation fluorescent color converting layer, the given dose ratio of fluorescent material wherein is that the principle by the deposition rate difference of the different fluorescent materials of balance is determined, makes the short wavelength of this Organic Light Emitting Diode be converted to the long emission wavelength frequency spectrum.
Be prior to forming dark-coloured extinction cover net on the substrate 300 in the present embodiment,, and form a plurality of red phosphor bodies 314, green fluorescent body 316 and transparent pixel body 318 according to the matrix deposition of red, green, blue again in the evaporation mode.Deposition forms a separator 340 on this phosphor body color converting layer 310 again, and forms an anode layer 354 with sputtering way on this separator 340; The formation of anode layer 354 is that the ito transparent electrode material is formed parallel long bar shaped transparency electrode with the method for yellow light lithography pattern (pattern) on substrate.Fully clean up.Now forms the uniform insulation layer 360 of a thickness with eurymeric chemical amplification type insulation constituent in the mode of spin coating on substrate.Then the substrate that this has been applied eurymeric chemical amplification type insulation constituent carries out preceding baking (prebake) in baking oven, and now uses the light shield with bar pattern, cooperates the exposure facility to expose on substrate.Then this substrate is handled with postexposure bake (PEB), and when back baking (PEB) is handled, carry out surface treatment with the atmosphere that imports tetramethyl ammonium hydroxide simultaneously to the insulation layer, after developing, pull the formation parallel long bar shaped insulation layer vertical with parallel long bar shaped ito transparent electrode in base, and the cross section of this parallel long bar shaped insulation layer is the narrow shape of tool top width base portion top, thickness 0.8 μ m, the wide 0.18 μ m of strip insulation layer line.Form an organic electro luminescent layer 350 in the evaporation mode afterwards and on this anode layer 344, it is that the strip insulation layer with the narrow shape of this top width base portion is a shadow mask, gap area between all parallel shadow mask is with CuPc (the copper phthalocyanine of 250 dust thickness on the vacuum evaporation mode evaporation; Afterwards again the NPB of 500 dust thickness on the evaporation (4,4 '-bis[N-(1-naphthyl)-N-phenyl-amino]-biphenyl; BA-1 (Bis (2-methyl-8-quinolinolato) aluminum (III)-μ-oxo-bis (2-methyl-8-quinolinolato) aluminum (III) of 500 dust thickness on the evaporation more afterwards; The LiF of 15 dust thickness on the evaporation more afterwards; Form cathode layer 352 in the evaporation mode at last, on organic electro luminescent layer 350,,, so be formed with dynamo-electric light display element equally with vacuum evaporation mode evaporation to 1000 dust thickness with cathode electrode aluminium.On cathode layer 352, deposit layer protective layer 370 at last again as AromaticPolyimide, Parylene or Teflon Copolymer.
When this device starts, be to pass to electric current, order about organic luminous layer 350 and send blue light that this blue light illumination produces independent pixel red, blue, green each color in red phosphor body 314, green fluorescent body 316 and transparent pixel body 318 via negative electrode 352 and anode 354.
It is excitation source that the present invention proposes a monochromatic organic electroluminescent body for the first time, again with quite ripe at present fluorescent color converting layer technology, the fluorescent substance that deposits different colours respectively can overcome the problem that the red luminous organic material of prior art lacks to produce various colors.And because the fluorescent technology is quite ripe, the present invention can utilize with each color phosphor body constituent of known luminescence efficient material as color converting layer, and luminous quantity is even, can't have the too big or bad problem of luminous efficiency of luminous efficiency drop in the known technology; And then a high brightness, the good component structure of the uniformity are provided, so that the application of full-colorization of display to be provided.On the other hand, the light that Organnic electroluminescent device of the present invention produced is non-to be mixed by complementary colours, but is made up of three primary colors, and purity is high and luminous even, more strengthens the using value of full-colorization organic light emitting display, and quickens the commercialization appearance.
In addition, the present invention is that the shortwave blue light by organic illuminating element excites the fluorescent powder and emits light, so can not form the frequency spectrum of specific direction, can provide the light radiation frequency spectrum of homogeneous, wideband, is particularly suitable for scanner or display light source and uses.
It should be noted that above-mentioned many embodiment give an example for convenience of explanation, the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (20)
1. composite colour organic electroluminescent display device comprises:
One substrate;
One first electrode layer (negative electrode) is positioned at the side that this base is pulled;
One the second electrode lay (anode) is folded between this first electrode layer (negative electrode) and this substrate;
At least one organic electro luminescent layer is folded between this second electrode lay (anode) and this first electrode layer (negative electrode); And
One phosphor powder body colour conversion layer is folded between this second utmost point layer (anode) and this substrate;
Wherein this organic electro luminescent layer is sent the light of main wavelength between the blue light wavelength scope after electric current excites;
This phosphor powder body colour conversion layer is that this organic electro luminescent layer is excited the blue light that is sent through electric current, is converted to ruddiness or green glow, the independent pixel information of red to produce, blue, green each color.
2, organic electroluminescence display device and method of manufacturing same as claimed in claim 1; it is characterized in that; also comprise a separator; this separator is folded between this second electrode lay (anode) and this phosphor powder body colour conversion layer; and this separator is folded between this second electrode lay and this phosphor powder body colour conversion layer, to protect this phosphor powder body colour conversion layer.
3, organic electroluminescence display device and method of manufacturing same as claimed in claim 1; it is characterized in that; also comprise a protective layer; this protective layer is positioned at the surface of this first electrode layer (negative electrode) to protect this first electrode layer (negative electrode), this protective layer such as Aromatic Polyimide, Parylene or TeflonCopolymer.
4, organic electroluminescence display device and method of manufacturing same as claimed in claim 1 is characterized in that, also comprises at least one dark-coloured extinction matrix frame, and this dead color extinction matrix frame is positioned at the pixel periphery of this phosphor powder body colour conversion layer in case leak-stopping light.
5, organic electroluminescence display device and method of manufacturing same as claimed in claim 1 is characterized in that, wherein this second electrode lay (anode) is a transparent electrode layer.
6, organic electroluminescence display device and method of manufacturing same as claimed in claim 1 is characterized in that, wherein this second electrode lay (anode) is indium tin oxide (ITO).
7, organic electroluminescence display device and method of manufacturing same as claimed in claim 1 is characterized in that, wherein this separator is transparent epoxy resin, pi resin, silicone or inorganic transparent adhesive such as SiO
2Or TiO
2
8, organic electroluminescence display device and method of manufacturing same as claimed in claim 1, it is characterized in that, wherein this organic electro luminescent layer is macromolecule organic electro luminescent layer or micromolecule organic electro luminescent layer, and being used to produce short wavelength's blue light is ruddiness and green glow to excite phosphor powder body colour conversion layer.
9, organic electroluminescence display device and method of manufacturing same as claimed in claim 1 is characterized in that, wherein this fluorescent powder is the first powder of inorganic firefly.
10, organic electroluminescence display device and method of manufacturing same as claimed in claim 1, it is characterized in that, wherein this first electrode layer (negative electrode) is a plurality of strip shaped electric poles, and this second electrode lay (anode) is a plurality of strip shaped electric poles, and this first electrode layer (negative electrode) is staggered with this second electrode lay (anode).
11, a kind of manufacture method of composite colour organic electroluminescent display device comprises the steps:
On a substrate, form a phosphor powder body colour conversion layer;
On this phosphor powder body colour conversion layer, form a second electrode lay (anode) layer;
Go up at least one organic electro luminescent layer of formation in this second electrode lay (anode);
And
On this organic electro luminescent layer, form one first electrode layer (negative electrode);
Wherein, this organic electro luminescent layer is sent the light of main wavelength between the wave-length coverage of blue light after electric current excites;
This phosphor powder body colour conversion layer excites the blue light that is sent with this organic electro luminescent layer through electric current, is converted to ruddiness or green glow, independent pixel information red, blue to produce, green each color.
12, manufacture method as claimed in claim 11; it is characterized in that; it also is contained in after phosphor powder body colour conversion layer forms; on this phosphor powder body colour conversion layer, form a transparent spacer layer; and this transparent spacer layer is folded between this second electrode lay and this phosphor powder body colour conversion layer, to protect this phosphor powder body colour conversion layer.
13, manufacture method as claimed in claim 11, it is characterized in that, it also is contained in after this phosphor powder body colour conversion layer forms, and forms dark-coloured extinction matrix frame on this substrate, and this dead color extinction matrix frame is positioned at the pixel periphery of this phosphor powder body colour conversion layer in case leak-stopping light.
14, manufacture method as claimed in claim 12 is characterized in that, it also is contained in before this separator forms, and forms dark-coloured extinction matrix frame on this substrate, and this dead color extinction matrix frame is positioned at the pixel periphery of this phosphor powder body colour conversion layer in case leak-stopping light.
15, manufacture method as claimed in claim 11 is characterized in that, wherein this fluorescent powder conversion layer forms with sedimentation.
16, manufacture method as claimed in claim 11 is characterized in that, wherein this second electrode lay (anode) is indium tin oxide (ITO).
17, manufacture method as claimed in claim 12 is characterized in that, wherein this separator is transparent epoxy resin, pi resin, silicone or inorganic transparent adhesive such as SiO
2Or TiO
2
18, manufacture method as claimed in claim 11 is characterized in that, wherein this organic electro luminescent layer is macromolecule organic electro luminescent layer or micromolecule organic electric-excitation luminescent layer.
19, manufacture method as claimed in claim 11 is characterized in that, wherein this fluorescent powder is inorganic fluorescent powder.
20, manufacture method as claimed in claim 11, it is characterized in that, wherein this first electrode layer (negative electrode) is a plurality of strip shaped electric poles, and this second electrode lay (anode) is a plurality of strip shaped electric poles, and this first electrode layer (negative electrode) is staggered with this second electrode lay (anode).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02124916 CN1464766A (en) | 2002-06-25 | 2002-06-25 | Composite colour organic electroluminescent display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02124916 CN1464766A (en) | 2002-06-25 | 2002-06-25 | Composite colour organic electroluminescent display device |
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|---|---|
| CN1464766A true CN1464766A (en) | 2003-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02124916 Pending CN1464766A (en) | 2002-06-25 | 2002-06-25 | Composite colour organic electroluminescent display device |
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| CN (1) | CN1464766A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028940A1 (en) * | 2005-09-10 | 2007-03-15 | Eastman Kodak Company | A display element |
| CN1674752B (en) * | 2004-03-24 | 2010-09-29 | 三洋电机株式会社 | Light emitting display apparatus |
| CN106410049A (en) * | 2016-06-02 | 2017-02-15 | 深圳市华星光电技术有限公司 | OLED device and OLED display |
| CN108877573A (en) * | 2017-05-08 | 2018-11-23 | 法雷奥市光（中国）车灯有限公司 | Pattern luminescent panel, light emitting device, car light and motor vehicles |
| CN110416437A (en) * | 2018-07-25 | 2019-11-05 | 京东方科技集团股份有限公司 | Display panel and its manufacturing method, display device |
| CN110429196A (en) * | 2018-09-18 | 2019-11-08 | 广东聚华印刷显示技术有限公司 | The preparation method and display device of display device, display device |
| WO2020056809A1 (en) * | 2018-09-21 | 2020-03-26 | 深圳市华星光电半导体显示技术有限公司 | Woled back plate and preparation method therefor |
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2002
- 2002-06-25 CN CN 02124916 patent/CN1464766A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1674752B (en) * | 2004-03-24 | 2010-09-29 | 三洋电机株式会社 | Light emitting display apparatus |
| WO2007028940A1 (en) * | 2005-09-10 | 2007-03-15 | Eastman Kodak Company | A display element |
| CN106410049A (en) * | 2016-06-02 | 2017-02-15 | 深圳市华星光电技术有限公司 | OLED device and OLED display |
| CN108877573A (en) * | 2017-05-08 | 2018-11-23 | 法雷奥市光（中国）车灯有限公司 | Pattern luminescent panel, light emitting device, car light and motor vehicles |
| CN110416437A (en) * | 2018-07-25 | 2019-11-05 | 京东方科技集团股份有限公司 | Display panel and its manufacturing method, display device |
| US11532803B2 (en) | 2018-07-25 | 2022-12-20 | Beijing Boe Technology Development Co., Ltd. | Display panel and method of manufacturing the same, and display device |
| CN110429196A (en) * | 2018-09-18 | 2019-11-08 | 广东聚华印刷显示技术有限公司 | The preparation method and display device of display device, display device |
| CN110429196B (en) * | 2018-09-18 | 2022-03-18 | 广东聚华印刷显示技术有限公司 | Display device, preparation method of display device and display device |
| WO2020056809A1 (en) * | 2018-09-21 | 2020-03-26 | 深圳市华星光电半导体显示技术有限公司 | Woled back plate and preparation method therefor |
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