CN100442533C - Full color organic electrouminescent display device - Google Patents
Full color organic electrouminescent display device Download PDFInfo
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- CN100442533C CN100442533C CNB021249180A CN02124918A CN100442533C CN 100442533 C CN100442533 C CN 100442533C CN B021249180 A CNB021249180 A CN B021249180A CN 02124918 A CN02124918 A CN 02124918A CN 100442533 C CN100442533 C CN 100442533C
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Abstract
The present invention relates to a full color organic electroluminescent display device which comprises a base board, a first electrode layer(cathode), a second electrode layer (anode), at least one organic electroluminescent layer, a fluorescent powder color converting layer and at least one light filtering piece layer, wherein the first electrode layer (cathode) is positioned on one side of the base board, the second electrode layer (anode) is sandwiched between the first electrode layer (cathode) and the base board, the organic electroluminescent layer is sandwiched between the second electrode layer (anode) and the first electrode layer (cathode), the fluorescent powder color converting layer is sandwiched between the second electrode layer (anode) and the base board, the light filtering piece layer is sandwiched between the fluorescent powder color converting layer and the base board, the fluorescent powder color converting layer converts the short wavelength ultraviolet light or blue light generated by the organic electroluminescent layer through current excitation into white hybrid light, and then the white hybrid light is converted into the full color display information by colored light filtering pieces. The present invention also relates to a manufacturing method for 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
With regard to the full-colorization technology of organic light emitting display, at present the technology of quite popularizing is rough is divided into two kinds of technology, and the one, adopt the Red Green Blue luminous organic material to make separately independently " the three primary colors luminescent layer method " of organic electroluminescent pixel.Another kind then is only to adopt blue organic luminous material to cooperate red green organic light emission look conversion body to produce versicolor " look transformational structure method ".
Three primary colors luminescent layer method commonly used as shown in Figure 1.Fig. 1 is the schematic diagram of the three primary colors luminescent layer method of known technology.This technology is to form on transparency carrier 100 after the anode 102, respectively red organic luminorphor 110, green organic luminorphor 120 and blue organic luminorphor 130 on the evaporation again, negative electrode 104 and carry out suitable processing on the evaporation more afterwards.Right this technology is to utilize the active illuminating characteristic of organic light emitting display itself and produce different colors, does not therefore need the extra filtering assembly of mixing colours that uses.Right its made separately the independently technical sophistication degree of difficulty height of the luminous pixel of three primary colors, and is not easy to produce.And, must cooperate the vapour deposition method of high accurancy and precision, and be not suitable for volume production enforcement if desire is developed the display product of big picture, high-res.
And the technology of three primary colors luminescent layer method still is subject to the good micromolecule red light material of Shang Weiyou at present, and three primary colors luminescent material luminous efficiency drop each other is too big, luminosity is inhomogeneous, if wish to get even brightness display frame, then can cause the difficulty on whole film layer structure coupling and the drives.
And look transformational structure method commonly used as shown in Figure 2.Fig. 2 is the schematic diagram of the look transformational structure method of known technology.This technology is to put the organic color converting layer 210 of one deck on transparency carrier 200, contains independently red organic look conversion body 211 and green organic look conversion body 212 in this organic color converting layer, is equipped with blue organic luminous layer 220 on the color converting layer 210.This technology is to utilize blue light material to cooperate organic redness and green color converting layer full-color to show; But the luminous efficiency of this technology is relatively poor, and still lacks red Material Used at present.Range of application is wideless, and is not suitable for volume production.
Moreover once the someone proposed a novel full-color Organic Light Emitting Diode technology, was the Organic Light Emitting Diode that utilizes the emission ultraviolet light, and purple light excited pre-aligned good red, blue, the green tri-color phosphor that is produced is to produce full-color effect.But identical with above-mentioned prior art, also all need the processing procedure of a selective deposition, this processing procedure is the maximum commercialization bottleneck of present full-color organic light emitting display just, be located at the trichromatic material pixel of difference position because need at every turn.But with the requirement of work large scale and high-res, the difficulty of this kind color pixel location positioning significantly increases especially.In addition, this selective deposition at present is in evaporate process, adds the shade mode and reach on panel, and under the more and more high situation of precision requirement, the hole of shade itself certainly will influence the pixel resolution of display.Therefore, still need at present a kind of new full-color technology on the market, can avoid above-mentioned processing procedure problem, the luminous efficiency that can reach between each color simultaneously is close, color resolution height, 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, with can homogenizing the luminosity of pigment, the luminous efficiency between each color of furthering improves luminous efficiency, increases the color resolution, and can be applicable to the large scale screen.
Another object of the present invention is to provide the manufacture method of composite colour organic electroluminescent display device, simplify fabrication steps, only need to cooperate white together comprehensive coating or the deposition manufacture process that blendes together the phosphor powder body colour conversion layer of light, avoid using the processing procedure of selective deposition, and can overcome the restriction of red Material Used, and the colorized optical filtering chip technology that expands the available liquid crystal display is applied to the display of organic electroluminescence field, quickens the commercialization of marching toward of composite colour organic electroluminescent Display Technique.
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);
One phosphor powder body colour conversion layer is folded between this second electrode lay (anode) and this substrate; And
At least one filter layer is folded between this phosphor powder body colour conversion layer and this substrate;
Wherein this phosphor powder body colour conversion layer blendes together light for exciting the light that is sent to be converted to white through electric current this organic electro luminescent layer.
Also comprise a separator, this separator is folded between this second electrode lay (anode) and this filter layer, and this separator is folded between this second electrode lay (anode) and this substrate, to protect this filter 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 TeflonCopolymef.
Also comprise at least one dark-coloured extinction matrix frame, this dead color extinction matrix frame is positioned at the periphery of this filter pixel 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 or ultraviolet light is white light to excite phosphor powder body colour conversion layer.
Wherein this phosphor powder body colour conversion layer is a composition red, blue, the green 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).
The manufacture method of composite colour organic electroluminescent display device provided by the invention may further comprise the steps:
On a substrate, form at least one filter layer;
On this filter layer, 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 phosphor powder body colour conversion layer excites the light that is sent to be converted to white through electric current this organic electro luminescent layer to blend together light.
Also be contained in after filter layer forms, on this filter layer, form a transparent spacer layer, and on this separator, form a phosphor powder body colour conversion layer.
Also be contained in before this phosphor powder body colour conversion layer forms, form dark-coloured extinction matrix frame on this substrate, this dead color extinction matrix frame is positioned at the pixel periphery of this filter in case leak-stopping light.
Also be contained in before this separator forms, pull in this base and form dark-coloured extinction matrix frame, this dead color extinction matrix frame is positioned at the pixel periphery of this filter in case leak-stopping light.
Wherein this fluorescent powder conversion layer is to form with method of spin coating or printing rubbing method.
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.
Description of drawings
Fig. 1 is the schematic diagram of the three primary colors luminescent layer method of known technology.
Fig. 2 is the schematic diagram of the look transformational structure method of known technology.
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 material of first electrode of the present invention or second electrode can optionally be selected transparent electric conducting material for use.The material of substrate can optionally be selected material transparent for use, is preferably soda-lime glass, Pyrex, plastic cement or silicon wafer.The material of first electrode is preferably InSnO
3, SnO
2, doping ZnO In
2O
3, CdSnO or antimony.The material of second electrode 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 single layer structure or optionally is the structure of multilayer.This multilayer organic electro luminescent layer can be has electric hole implanted layer, electric hole transport layer, electroluminescence layer, the organic electro luminescent layer of electron transfer layer or electron injecting layer.Can optionally form the dark-coloured extinction matrix frame of a shading between the filter of the present invention or between filter and substrate, in order to interference that reduces surround lighting and the image sharpening that increases the pixel edge.
Color converting layer of the present invention is a thin layer of being made up of fluorescent powder and adhesion polymer, and it is to blend together light in order to excite the light that is sent to be converted to white through electric current organic electro luminescent layer; Utilize colored filter to produce color again.Whole color converting layer structure is the fluorescent powder by ultraviolet light that can absorb the short wavelength or blue light, is coated with or the moulding of dry type depositional mode with wet type after evenly mixing.The alternative condition of this fluorescent powder is preferably and can shines, can become white light, good to temperature stability with organic blue light emitting device colour mixture by anti-high-strength light, and good to the environment weatherability.The optical wavelength that employed fluorescent powder kind is sent according to organic electro luminescent layer and determining, if the light that sends of organic electro luminescent layer is ultraviolet light, then the employed fluorescent powder of color converting layer kind is preferably the mixing that ultraviolet excitation light can be converted to redness, green or blue fluorescent powder; If what organic electro luminescent layer was sent is blue light, then the employed fluorescent powder of color converting layer kind is preferably the mixing of the fluorescent powder that blue-light excited light can be converted to redness or green.This adhesion polymer 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 filter layer, and this separator is folded between this second electrode lay (anode) and this substrate, to protect this filter layer.Insolated layer materials of the present invention is unrestricted, is preferably to be 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
3A
L5O
12(YAG) fluorescent powder.Because element can replace part Y in character 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 color converting layer technology of an atom level microcosmic fusion single layer white light, to overcome the too big or bad problem of luminous efficiency of prior art luminous efficiency drop.
Dry process then be with after the stalk restatement amount 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.
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) 342; One anode (the second electrode lay) 344; One organic electro luminescent layer 340; One phosphor powder body colour conversion layer 330; One separator 320; A plurality of filters 310; Dark-coloured extinction matrix frame 312, and a cathodic protection layer 360.Wherein the surface of substrate 300 is to form dark-coloured extinction matrix frame and a plurality of filter 310, each filter 310 corresponding pixel earlier.Alleged herein pixel refers to by negative electrode (first electrode layer) 342, and anode (the second electrode lay) 344 and organic electro luminescent layer 340 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 shading matrix frame of a black, and it is in order to cover the scattered light at pixel edge.This dead color extinction cover net 312 around the edge of this pixel with the scope of definition pixel.On black light-absorbing matrix frame 312 and this filter 310, optionally be formed with a separator (overcoating), this separator (overcoating) is in order to the dark-coloured extinction cover net of protection black and this filter.In this preferable example, on black light-absorbing cover net 312 and this filter 310, be formed with a separator (overcoating) 320.On the separator 320 (overcoating), be provided with a phosphor powder body colour conversion layer 330.This phosphor powder body colour conversion layer 330 is a thin layer of being made up of fluorescent powder and adhesion polymer.It blendes together light in order to excite the light that is sent to be converted to white through electric current organic electro luminescent layer.On the phosphor powder body colour conversion layer 330, be provided with a strip transparent indium-tin-oxide layer (ITO layer) 344.Between this indium tin oxide layer (ITO layer) 344, optionally be formed with directional light resistance insulation, when it formed as cathode substance between picture element, definition cathode substance scope was used.On indium tin oxide layer (ITO layer), evaporation or sputter organic luminous layer 340 are in order to send the light in specific wavelength field.In this preferable example, this organic luminous layer 340 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, uses to form a phosphor layers on substrate.This fluorescent powder is with oxalic acid-triethylamine coprecipitation method preparation.This preparation method is rough as follows:
The preparation of preparation example 1 fluorescent powder
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, burning what separate is at first to stop 1 hour in 300 ℃, is warming up to 500 ℃ thereupon again and stops 1 hour, stops 24 hours in 1000 ℃ at last, gets 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 is by the principle modulation of this long emission wavelength frequency spectrum according to the different three primary colors fluorescent material of balance luminous efficiency.Use sol-gal process to mix down in solution atom level state.
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.
After treating the material preparation of white color conversion layer, be convenient on the substrate 300,, and form a color filter layers 310 according to the sequence of matrices of red, green, blue with mode of printing.In wet type spin coating mode, utilize rotary coating mode spin coating white light fluorescent powder on filter layer 310 afterwards, toasted again afterwards to remove and desolvate and moisture, and finish a white light phosphor powder body colour conversion layer behind the deposition layer protective layer.After forming a white light phosphor powder body colour conversion layer 330 on this filter layer 310, on this phosphor powder body colour conversion layer 330, form anode layer 344 (ITO) transparency electrode material again) with sputtering way; The formation of anode layer 344 is the ito transparent electrode material is formed parallel long bar shaped transparency electrode with the method for yellow light lithography pattern (pattern) and fully to clean up on substrate.Now forms the uniform photoresist layer 350 of a thickness with eurymeric chemical amplification type light resistance composition in the mode of spin coating on substrate.The substrate that then this has been applied eurymeric chemical amplification type light resistance composition carries out preceding baking (prebake) in baking oven, 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 photoresist layer, after developing, on substrate, form the parallel long strip light resistance layer vertical with parallel long bar shaped ito transparent electrode, and the cross section of this parallel long strip light resistance layer is that tool top width base portion is narrow, thickness 0.8 μ m, strip photoresist layer live width 0.18 μ m.Form an organic electro luminescent layer 340 in the evaporation mode afterwards and on this anode layer 344, it is that the strip photoresist 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)-β-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 342 in the evaporation mode at last, be on organic electro luminescent layer 340 with cathode electrode aluminium, equally with vacuum evaporation mode evaporation to 1000 dust thickness, so be formed with dynamo-electric light display element.On cathode layer 342, deposit layer protective layer 360 at last again as AromaticPolyimide, Parylene or Teflon Copolymer.
When this device passes to current drives, be to pass to electric current, order about organic luminous layer 340 and send blue light that this blue light illumination converts white mixed light on phosphor powder body colour conversion layer 330 via negative electrode 342 and anode 344; This white mixed light filters through colored filter 310 again, produces different color information.
Embodiment 2
Present embodiment removes the manufacturing powder that uses drying journey in white light phosphor powder body colour conversion layer, and with outside target method for sputtering formation white light phosphor powder body colour conversion layer is on this filter layer, other steps are all identical with embodiment 1.After this white light phosphor powder body forms, with sputtering way this mixture sputter is formed a white color conversion layer on this filter layer thereupon, and in same processing procedure, deposit another protective layer, finish the white color conversion layer structure.
From the above, the present invention proposes the color converting layer technology of an atom level microcosmic fusion single layer white light for the first time, to overcome the too big or bad problem of luminous efficiency of prior art luminous efficiency drop, provide a high brightness, the good component structure of the uniformity, so that the application of full-colorization of display to be provided.Another advantage of the present invention is not for needing electing property of three primary colors deposition, make the resolution of following display no longer be subject to the fineness of shade, promote process rate simultaneously, quite be fit to the use of large scale screen, the present invention has more used the mature fluorescent material of prior art and colorized optical filtering chip technology in organic luminorphor flat-panel screens field, comes out with the commercialization of quickening full-colorization organic light emitting display.
In addition, the present invention is excited the fluorescent powder and is emitted light by the shortwave blue light of organic illuminating element, can not form the frequency spectrum of specific direction, and the light radiation frequency spectrum of homogeneous, wideband can be provided, and 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 (19)
1, a kind of composite colour organic electroluminescent display device comprises:
One substrate;
One first electrode layer is positioned at a side of this substrate;
One the second electrode lay is folded between this first electrode layer and this substrate;
At least one organic electro luminescent layer is folded between this second electrode lay and this first electrode layer;
One phosphor powder body colour conversion layer is folded between this second electrode lay and this substrate; And
At least one filter layer is folded between this phosphor powder body colour conversion layer and this substrate;
Wherein this phosphor powder body colour conversion layer blendes together light for exciting the light that is sent to be converted to white through electric current this organic electro luminescent layer, and the employed fluorescent powder of this phosphor powder body colour conversion layer is the Y that is mixed with rare earth element
3Al
5O
12(YAG) phosphor body.
2, composite colour organic electroluminescent display device as claimed in claim 1; it is characterized in that, also comprise a separator, this separator is folded between this second electrode lay and this filter layer; and this separator is folded between this second electrode lay and this substrate, to protect this filter layer.
3, composite colour organic electroluminescent display device 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 to protect this first electrode layer, and this protective layer is aromatic polyimide, parylene or polytetrafluoroethylene.
4, composite colour organic electroluminescent display device 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 periphery of this filter pixel in case leak-stopping light.
5, composite colour organic electroluminescent display device as claimed in claim 1 is characterized in that, wherein this second electrode lay is a transparent electrode layer.
6, composite colour organic electroluminescent display device as claimed in claim 1 is characterized in that, wherein this second electrode lay is an indium tin oxide.
7, composite colour organic electroluminescent display device as claimed in claim 2 is characterized in that, wherein this separator is transparent epoxy resin, pi resin, silicone or inorganic transparent adhesive.
8, composite colour organic electroluminescent display device 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, is used to produce short wavelength's blue light or ultraviolet light and sends white light to excite phosphor powder body colour conversion layer.
9, composite colour organic electroluminescent display device as claimed in claim 1 is characterized in that, wherein this phosphor powder body colour conversion layer is a composition red, blue, the green fluorescent powder.
10, composite colour organic electroluminescent display device as claimed in claim 1, it is characterized in that, wherein this first electrode layer 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 and this second electrode lay are staggered.
11, a kind of manufacture method of composite colour organic electroluminescent display device may further comprise the steps:
On a substrate, form at least one filter layer;
Form dark-coloured extinction matrix frame on this substrate, this dead color extinction matrix frame is positioned at the pixel periphery of this filter in case leak-stopping light;
On this filter layer, form a phosphor powder body colour conversion layer;
On this phosphor powder body colour conversion layer, form a second electrode lay layer;
On this second electrode lay, form at least one organic electro luminescent layer;
And
On this organic electro luminescent layer, form one first electrode layer;
Wherein this phosphor powder body colour conversion layer excites the light that is sent to be converted to white through electric current this organic electro luminescent layer to blend together light, and the employed fluorescent powder of this phosphor powder body colour conversion layer is the Y that is mixed with rare earth element
3Al
5O
12(YAG) phosphor body.
12, manufacture method as claimed in claim 11 is characterized in that, also is contained in after filter layer forms, and forms a transparent spacer layer on this filter layer, and form a phosphor powder body colour conversion layer on this separator.
13, manufacture method as claimed in claim 11 is characterized in that, also is contained in before this separator forms, and pulls in this base and forms dark-coloured extinction matrix frame, and this dead color extinction matrix frame is positioned at the pixel periphery of this filter in case leak-stopping light.
14, manufacture method as claimed in claim 11 is characterized in that, wherein this fluorescent powder conversion layer is to form with method of spin coating or printing rubbing method.
15, manufacture method as claimed in claim 11 is characterized in that, wherein this second electrode lay (anode) is indium tin oxide (ITO).
16, manufacture method as claimed in claim 11 is characterized in that, wherein this separator is transparent epoxy resin, pi resin, silicone or inorganic transparent adhesive.
17, 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.
18, composite colour organic electroluminescent display device as claimed in claim 11 is characterized in that, wherein this phosphor powder body colour conversion layer is a composition red, blue, the green fluorescent powder.
19, composite colour organic electroluminescent display device as claimed in claim 11 is characterized in that, wherein this first electrode layer is a plurality of strip shaped electric poles, and this second electrode lay is a plurality of strip shaped electric poles, and this first electrode layer and this second electrode lay are staggered.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021249180A CN100442533C (en) | 2002-06-25 | 2002-06-25 | Full color organic electrouminescent display device |
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|---|---|---|---|
| CNB021249180A CN100442533C (en) | 2002-06-25 | 2002-06-25 | Full color organic electrouminescent display device |
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| CN100442533C true CN100442533C (en) | 2008-12-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006058332A (en) * | 2004-08-17 | 2006-03-02 | Seiko Epson Corp | Electro-optical device and electronic appliance |
| FR2903224A1 (en) * | 2006-06-30 | 2008-01-04 | Thomson Licensing Sa | DISPLAY DEVICE AND USES THEREOF. |
| CN102095155B (en) * | 2009-11-25 | 2014-05-14 | 松下电器产业株式会社 | Light-emitting unit and illumination fixture using same |
| CN103346265B (en) * | 2013-06-21 | 2016-01-06 | 深圳市华星光电技术有限公司 | A kind of luminescent device, display floater and manufacture method thereof |
| CN104252100B (en) * | 2013-06-26 | 2019-06-18 | 新应材股份有限公司 | Photocurable constituent and its application |
| CN109841747B (en) * | 2017-11-27 | 2021-09-24 | 上海和辉光电股份有限公司 | Organic light-emitting display panel and display device |
| CN110212008B (en) * | 2019-06-24 | 2021-07-23 | 深圳市华星光电半导体显示技术有限公司 | Array substrate and preparation method thereof |
| CN112002746B (en) * | 2020-08-31 | 2022-09-16 | 武汉天马微电子有限公司 | Display panel and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5717289A (en) * | 1996-01-30 | 1998-02-10 | Nec Corporation | Thin film electroluminescent element easily regulating emitted light to white |
| JP2001185356A (en) * | 1999-12-27 | 2001-07-06 | Nec Corp | Organic electroluminescent element and its manufacturing method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5717289A (en) * | 1996-01-30 | 1998-02-10 | Nec Corporation | Thin film electroluminescent element easily regulating emitted light to white |
| JP2001185356A (en) * | 1999-12-27 | 2001-07-06 | Nec Corp | Organic electroluminescent element and its manufacturing method |
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| CN1466405A (en) | 2004-01-07 |
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