CN100411186C - Organic light-emitting display panel - Google Patents
Organic light-emitting display panel Download PDFInfo
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- CN100411186C CN100411186C CNB2003101044155A CN200310104415A CN100411186C CN 100411186 C CN100411186 C CN 100411186C CN B2003101044155 A CNB2003101044155 A CN B2003101044155A CN 200310104415 A CN200310104415 A CN 200310104415A CN 100411186 C CN100411186 C CN 100411186C
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- display panel
- electroluminescence display
- organic electroluminescence
- barrier layer
- organic
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Abstract
The present invention relates to an organic luminous display panel which comprises a base plate, at least one organic luminous zone, at least one protection layer and at least one barrier layer, wherein the organic luminous zone is formed on the base plate. The organic luminous zone has a plurality of pixels. The protection layer is formed on the base plate and the organic luminous zone. The barrier layer is formed on the protection layer.
Description
Technical field
The present invention relates to a kind of display floater, particularly a kind of organic electroluminescence display panel.
Background technology
Flat-panel screens is towards high brightness, complanation, the frivolous and trend development of economizing the energy in recent years, and in view of this, organic light emission (OEL) display unit becomes one of direction of utmost point desire development in the present opto-electronics.Organic light-emitting display device is the device that a kind of self luminous characteristic of utilizing organic functional material (organic functional materials) reaches display effect, molecular weight difference according to the organic functional material, can be divided into micromolecule organic light-emitting display device (small molecule OLED, SM-OLED) with macromolecule organic light-emitting display device (polymer light-emitting display, PLED) two big classes.
Because organic illuminating element (organic functional material) is very responsive for aqueous vapor and oxygen, with be easy to generate dim spot (Dark Spot) after atmosphere contacts, so, in order to ensure the useful life of organic illuminating element, as shown in Figure 1, present packaged type is to utilize ultraviolet light photopolymerization resin 31 with the substrate 33 mutual involutions of package casing 32 with organic light emitting apparatus 3, makes organic illuminating element 34 be arranged in a confined space.Yet the volume of this kind device is bigger, still has and improves the space, and meeting light, thin, short, little trend, and aqueous vapor and oxygen still can intrude into device inside via ultraviolet light photopolymerization resin 31, and then influence the life-span of organic light emitting apparatus 3.
Review another kind of present employed packaged type, be utilize modes such as sputter, plasma enhanced chemical vapor deposition (PECVD) or electron beam with inoranic membrane (as Si
xO
y) directly be deposited on the organic illuminating element.Yet,, more make aqueous vapor and oxygen intrude into element internal via the hole of rete because the surface of organic illuminating element and uneven makes inoranic membrane produce discontinuous situation.For avoiding this problem, as shown in Figure 2, first kind of settling mode is that the inoranic membrane 41 that deposits a layer thickness very thick (about 0.1 micron to 10 microns) coats whole organic illuminating element 42, yet blocked up inoranic membrane 41 its expansions or contractility can be restricted, thereby the generation internal stress, more likely cause inoranic membrane 41 to peel off the situation of demoulding when serious.In addition, as shown in Figure 3, second kind of settling mode is that evaporation or coating last layer organic layer 43 are used as resilient coating (buffer layer) and are used between inoranic membrane 41 and organic illuminating element 42, yet, the organic layer temperature capacity is relatively poor, under hot environment, may chap and cause watertight composition to lose efficacy, moreover, if mode with coating, solvent and aqueous vapor in the organic layer 43 before unhardened might corrode organic illuminating element 42, and the phenomenon of outgassing also might take place the organic layer 43 after the sclerosis.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and defective, a kind of organic electroluminescence display panel that stops aqueous vapor and oxygen invasion is provided.
For reaching above-mentioned purpose, according to a kind of organic electroluminescence display panel of the present invention, comprise a substrate, at least one organic luminous zone, at least one protective layer and at least one barrier layer, wherein, organic luminous zone is formed on the substrate, and organic luminous zone has several pixels; The protection series of strata are formed on substrate and the organic luminous zone; Barrier layer is formed on the protective layer.
For reaching above-mentioned purpose, according to a kind of organic electroluminescence display panel of the present invention, comprise a substrate, at least one organic luminous zone, at least one protective layer, several teats and at least one barrier layer, wherein, organic luminous zone is formed on the substrate, and organic luminous zone has several pixels; Protective layer is formed on substrate and the organic luminous zone; Teat is formed on the protective layer; Barrier layer is formed on teat and/or the protective layer.
From the above, in organic electroluminescence display panel of the present invention, on protective layer, be formed with the barrier layer of one deck structure at least.Compared with prior art, the position that barrier layer of the present invention can stagger hole between the barrier layer compensates the defective of rete effectively.In addition, one deck structure more makes the path that penetrates of aqueous vapor increase at least, prevents that further aqueous vapor and oxygen from intruding into element internal.Again, the barrier layer among the present invention more can be made up of the barrier layer with different young's moduluses, and the barrier layer that will have low young's modulus is folded in the effect that cushions with generation between the barrier layer with higher young's modulus, uses the stress that reduces between the barrier layer.Moreover, utilize several teats to make barrier layer become wavy, this measure can increase the contact area and the adhesive force of barrier layer and other parts (protective layer and teat), the stress that is produced in the time of more can reducing rising-heat contracting-cold simultaneously.In addition, barrier layer can utilize the photo chemical vapor deposition method to form, utilize the photo chemical vapor deposition method not only can under low temperature (about below 300 ℃), provide enough rate of film builds, again, because the formed film layer structure of low temperature is comparatively loose, the internal stress of rete can be lowered, more the possibility that rete peels off can be reduced.
Description of drawings
Fig. 1 is an enforcement schematic diagram of the packaged type of existing organic illuminating element;
Fig. 2 is another enforcement schematic diagram of the packaged type of existing organic illuminating element;
Fig. 3 is an enforcement schematic diagram again of the packaged type of existing organic illuminating element;
Fig. 4 is a schematic diagram of organic electroluminescence display panel in the first embodiment of the invention;
Fig. 5 is a schematic diagram of organic electroluminescence display panel in the second embodiment of the invention;
Fig. 6 is another schematic diagram of organic electroluminescence display panel in the second embodiment of the invention.
Symbol description among the figure
1 organic electroluminescence display panel
11 substrates
12 organic luminous zone
121 pixels
1,211 first electrodes
1212 organic functional layers
1,213 second electrodes
13 protective layers
14,141,142,143 barrier layers
2 organic electroluminescence display panels
21 substrates
22 organic luminous zone
221 pixels
2,211 first electrodes
2212 organic functional layers
2,213 second electrodes
23 protective layers
24 teats
25 barrier layers
3 organic light emitting apparatus
31 ultraviolet light photopolymerization resins
32 package casings
33 substrates
34 organic illuminating elements
41 inoranic membranes
42 organic illuminating elements
43 organic layers
Embodiment
Hereinafter with reference to relevant drawings, the organic electroluminescence display panel according to preferred embodiment of the present invention is described.For ease of explanation, after relevant drawings only is shown in single pixel.
First embodiment
As shown in Figure 4, organic electroluminescence display panel 1 according to first embodiment of the invention, comprise a substrate 11, at least one organic luminous zone 12, at least one protective layer 13 and at least one barrier layer 14, wherein, organic luminous zone 12 is formed on the substrate 11, and organic luminous zone 12 has several pixels 121; Protective layer 13 is formed on substrate 11 and the organic luminous zone 12; Barrier layer 14 is formed on the protective layer 13.
In present embodiment, substrate 11 can be flexible (flexible) substrate or rigidity (rigid) substrate.In addition, substrate 11 can also be plastics (plastic) substrate or glass substrate or the like.Wherein, flexible base, board and plastic base can be Merlon (polycarbonate, PC) substrate, polyester (polyester, PET) substrate, cyclenes copolymer (cyclic olefincopolymer, COC) substrate or crome metal compound base material one cyclenes copolymer (metallocene-based cyclic olefin copolymer, mCOC) substrate.Certainly, substrate 11 can also be a silicon substrate.
In addition, please refer to Fig. 4 again, organic luminous zone 12 has several pixels 121, and pixel 121 comprises one first electrode 1211, at least one organic functional layer 1212 and one second electrode 1213 in regular turn, and first electrode 1211 is positioned on the substrate 11.
In present embodiment, first electrode 1211 utilizes sputter (sputtering) mode or ion plating (ion plating) mode is formed on the substrate 11.At this, first electrode 1211 is generally a transparent conductive metal oxide as anode and its material usually, for example tin indium oxide (ITO), aluminum zinc oxide (AlZnO) or indium zinc oxide (IZO).
In addition, organic functional layer 1212 comprises an electric hole implanted layer, an electric hole transfer layer, a luminescent layer, an electron transfer layer and an electron injecting layer (not shown) usually.Wherein, organic functional layer 1212 utilizes evaporation (evaporation), rotary coating (spin coating), ink jet printing (ink jet printing) or printing modes such as (printing) to be formed on first electrode 1211.In addition, the light launched of organic functional layer 1212 can be blue light, green glow, ruddiness, white light, other monochromatic light or the colourama that is combined into of monochromatic light.
Please refer to Fig. 4 again, second electrode 1213 is positioned on the organic functional layer 1212.In this, second electrode 1213 uses evaporation or sputter methods such as (sputtering) is formed on the organic functional layer 1212.In addition, the material of second electrode 1213 can be selected from but not be defined as aluminium (Al), calcium (Ca), magnesium (Mg), indium (In), tin (Sn), manganese (Mn), silver (Ag), gold (Au) and contain the alloy (for example magnesium silver (Mg:Ag) alloy, magnesium indium (Mg:In) alloy, magnesium tin (Mg:Sn) alloy, magnesium antimony (Mg:Sb) alloy and magnesium tellurium (Mg:Te) alloy) etc. of magnesium.
Then, please refer to Fig. 4 again, protective layer 13 is formed on substrate 11 and the organic luminous zone 12.In this, protective layer 13 can utilize the photo chemical vapor deposition method to form on submounts 11 and the organic luminous zone 12.Wherein, the photo chemical vapor deposition method can be vacuum-ultraviolet light (VacuumUltra-Violet, VUV) chemical vapour deposition technique.
Because the photo chemical vapor deposition method utilizes photon to decompose provocative reaction gas, so reaction is able to carry out at low temperature (being about below 300 ℃) environment.In addition, in present embodiment,, can reduce the internal stress of rete, come off so can avoid protective layer 13 to peel off because formed protective layer 13 structures of photo chemical vapor deposition method are comparatively loose.
Please refer to Fig. 4 again, the protective layer 13 in the present embodiment has the function of waterproof and anti-oxygen, can protect organic luminous zone 12 not to be subjected to the influence of aqueous vapor and oxygen.Moreover protective layer 13, makes the follow-up rete (as the barrier layer among Fig. 4 14) that is formed on the protective layer 13 have preferable uniformity, and discontinuous situation can not take place as the usefulness of planarization also in order to coat uneven organic luminous zone 12.Simultaneously, protective layer 13 more can coat existing particulate in the processing procedure.
In present embodiment, protective layer 13 is an inorganic, and protective layer 13 is selected from silica (SiO
2), the class diamond film (Diamond Like Carbon, DLC), silicon nitride (SiN
x), silicon oxynitride (SiO
xN
y) and alundum (Al (Al
2O
3) at least one of them.
Please refer to Fig. 4 again, several barrier layers 14 of present embodiment are formed on the protective layer 13.Wherein, the one deck at least in the barrier layer 14 can utilize the photo chemical vapor deposition method to form.Certainly, the one deck at least in the barrier layer 14 also can utilize sputtering method to form.
As mentioned above, utilize formed barrier layer 14 structures of photo chemical vapor deposition method comparatively loose, can reduce the internal stress of rete, come off so can avoid barrier layer 14 to peel off.
In present embodiment, barrier layer 14 is an inorganic, wherein, barrier layer 14 be selected from silica, class diamond film, silicon nitride, silicon oxynitride, alundum (Al and metal (including but not limited to aluminium, copper, gold and silver) at least one of them.In this, barrier layer 14 has water proofing property, can further improve the reliability of organic electroluminescence display panel 1.
Moreover the barrier layer 14 of present embodiment also can have water proofing property and pooling feature simultaneously.For example: as shown in Figure 4, barrier layer 141,143 (material such as silicon nitride, silicon oxynitride, class diamond film, alundum (Al and metal (for example, aluminium, copper, gold and silver)) has high water proofing property, can effectively prevent the invasion of aqueous vapor and oxygen; The barrier layer 142 (material such as silica) that is folded between the barrier layer 141,143 then has less mechanical strength, makes it have pooling feature, can reduce the internal stress of barrier layer 14 effectively.The position that this kind multilayered structure can stagger hole between the barrier layer 14 compensates the defective of rete effectively, more makes the path that penetrates of aqueous vapor increase in addition, further strengthens good waterproof effect.
Second embodiment
In addition, as Fig. 5 and shown in Figure 6, the organic electroluminescence display panel 2 of second embodiment of the invention, comprise a substrate 21, at least one organic luminous zone 22, at least one protective layer 23, several teats 24 and at least one barrier layer 25, wherein, organic luminous zone 22 is formed on the substrate 21, and organic luminous zone 22 has several pixels 221; Protective layer 23 is formed on substrate 21 and the organic luminous zone 22; Teat 24 is formed on the protective layer 23; Barrier layer 25 is formed on teat 24 and/or the protective layer 23.
In addition, pixel 221 comprises one first electrode 2211, at least one organic functional layer 2212 and one second electrode 2213 in regular turn, and first electrode 2211 is positioned on the substrate 21.
In present embodiment, the feature of substrate 21, organic luminous zone 22, pixel 221, first electrode 2211, organic functional layer 2212, second electrode 2213 and protective layer 23 is identical with the similar elements among the function and first embodiment, does not repeat them here.
Then, please refer to Fig. 5 and Fig. 6 again, teat 24 is formed on the protective layer 23.In present embodiment, teat 24 interconnects (as shown in Figure 5).Certainly, teat 24 can also independently be provided with (as shown in Figure 6).
In present embodiment, the material of teat 24 is a waterproof material, for example but be not defined as photosensitive material (for example photoresistance) or silicon dioxide.
Moreover the shape of the teat 24 of present embodiment can be a bulk or rectangular bulk or the like.In addition, in present embodiment, as shown in Figure 6, the angle theta between the side of teat 24 and the protective layer 23 is approximately more than or equal to 90 °, and it for fear of follow-up formed barrier layer 25 discontinuous situation takes place, and makes aqueous vapor and oxygen enter via hole.
In addition; as Fig. 5 and shown in Figure 6; because barrier layer 25 is formed on teat 24 and/or the protective layer 23; make barrier layer 25 present similar wavy structure; this kind structure has not only increased contact area and the adhesive force between barrier layer 25 and the other parts (teat 24 and protective layer 23), more can reduce the stress of rising-heat contracting-cold.
In present embodiment, except shape, identical among barrier layer 25 remaining feature and the function and first embodiment also repeats no more at this.
In organic electroluminescence display panel of the present invention, be on protective layer, to be formed with at least one deck The barrier layer of structure. Compared with prior art, barrier layer of the present invention can stagger barrier layer it Between the position of hole, effectively compensate the defective of rete. In addition, at least one deck structure more so that The path that penetrates of aqueous vapor increases, and prevents that further aqueous vapor and oxygen from intruding into element internal. Again, At least one deck barrier layer among the present invention more can be organized by the barrier layer with different young's moduluses Become, the barrier layer that will have low young's modulus is folded in the barrier layer with higher young's modulus Between to produce the effect of buffering, use the stress that reduces between the barrier layer. Moreover, utilize number Individual teat makes barrier layer become wavy, this measure can increase barrier layer and other parts (protective layer with Teat) contact area and adhesive force, the stress that produces in the time of more can reducing rising-heat contracting-cold simultaneously. In addition, barrier layer can utilize the photo chemical vapor deposition method to form, and utilizes the photo chemical vapor deposition method Not only can under low temperature (about 300 ℃), provide enough rate of film builds, again, because low temperature institute shape The film layer structure that becomes is comparatively loose, can lower the internal stress of rete, can reduce more that rete peels off Possibility.
The above only is illustrative, but not is restricted person. Anyly do not break away from essence of the present invention God and category, and to its equivalent modifications of carrying out or change all should be contained in claims In the scope.
Claims (25)
1. an organic electroluminescence display panel is characterized in that, comprises:
One substrate;
At least one organic luminous zone, it is formed on the substrate, and organic luminous zone has several pixels;
At least one protective layer, it is formed at and is covered in fully on substrate and the organic luminous zone, and forms with the photo chemical vapor deposition method; And
At least one barrier layer, it is formed on the protective layer.
2. organic electroluminescence display panel as claimed in claim 1, wherein, pixel comprises one first electrode, at least one organic functional layer and one second electrode in regular turn.
3. organic electroluminescence display panel as claimed in claim 2, wherein, the material of first electrode is the metal oxide of conduction.
4. organic electroluminescence display panel as claimed in claim 2, wherein, the alloy that the material of second electrode is selected from aluminium, calcium, magnesium, indium, tin, manganese, silver, gold and contains magnesium at least one of them.
5. organic electroluminescence display panel as claimed in claim 1, wherein, protective layer is an inorganic.
6. organic electroluminescence display panel as claimed in claim 5, wherein, protective layer be selected from silica, class diamond film, silicon nitride, silicon oxynitride and alundum (Al at least one of them.
7. organic electroluminescence display panel as claimed in claim 1, wherein, barrier layer is an inorganic.
8. organic electroluminescence display panel as claimed in claim 7, wherein, barrier layer be selected from silica, class diamond film, silicon nitride, silicon oxynitride, alundum (Al and metal at least one of them.
9. organic electroluminescence display panel as claimed in claim 8, wherein, metal comprises aluminium, copper, Jin Jiyin.
10. organic electroluminescence display panel as claimed in claim 1, wherein, barrier layer has water proofing property.
11. organic electroluminescence display panel as claimed in claim 10, wherein, one deck at least of barrier layer has resiliency.
12. organic electroluminescence display panel as claimed in claim 1, wherein, the one deck at least in the barrier layer forms with the photo chemical vapor deposition method or with sputtering method.
13. an organic electroluminescence display panel is characterized in that, comprises:
One substrate;
At least one organic luminous zone is formed on the substrate, and organic luminous zone has several pixels;
At least one protective layer is formed at and is covered in fully on substrate and the organic luminous zone, and forms with the photo chemical vapor deposition method;
Several teats are formed on the protective layer; And
At least one barrier layer, its be formed on the teat or teat and protective layer on.
14. organic electroluminescence display panel as claimed in claim 13, wherein, pixel comprises one first electrode, at least one organic functional layer and one second electrode in regular turn.
15. organic electroluminescence display panel as claimed in claim 14, wherein, the material of first electrode is the metal oxide of conduction.
16. organic electroluminescence display panel as claimed in claim 14, wherein, the alloy that the material of second electrode is selected from aluminium, calcium, magnesium, indium, tin, manganese, silver, gold and contains magnesium at least one of them.
17. organic electroluminescence display panel as claimed in claim 13, wherein, protective layer is an inorganic.
18. organic electroluminescence display panel as claimed in claim 17, wherein, protective layer be selected from silica, class diamond film, silicon nitride, silicon oxynitride and alundum (Al at least one of them.
19. organic electroluminescence display panel as claimed in claim 13, wherein, the material of teat is a waterproof material.
20. organic electroluminescence display panel as claimed in claim 13, wherein, barrier layer is an inorganic.
21. organic electroluminescence display panel as claimed in claim 20, wherein, barrier layer be selected from silica, ammonification silicon, class diamond film, silicon oxynitride, alundum (Al and metal at least one of them.
22. organic electroluminescence display panel as claimed in claim 21, wherein, metal comprises aluminium, copper, Jin Jiyin.
23. organic electroluminescence display panel as claimed in claim 13, wherein, barrier layer has water proofing property.
24. organic electroluminescence display panel as claimed in claim 23, wherein, one deck at least of barrier layer has resiliency.
25. organic electroluminescence display panel as claimed in claim 13, wherein, one deck at least of barrier layer forms with the photo chemical vapor deposition method or with sputtering method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101044155A CN100411186C (en) | 2003-10-29 | 2003-10-29 | Organic light-emitting display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101044155A CN100411186C (en) | 2003-10-29 | 2003-10-29 | Organic light-emitting display panel |
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| CN1612648A CN1612648A (en) | 2005-05-04 |
| CN100411186C true CN100411186C (en) | 2008-08-13 |
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|---|---|---|---|
| CNB2003101044155A Expired - Fee Related CN100411186C (en) | 2003-10-29 | 2003-10-29 | Organic light-emitting display panel |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7202504B2 (en) | 2004-05-20 | 2007-04-10 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting element and display device |
| WO2014136616A1 (en) * | 2013-03-08 | 2014-09-12 | 富士フイルム株式会社 | Organic el laminate |
| KR102212764B1 (en) * | 2013-10-15 | 2021-02-08 | 삼성디스플레이 주식회사 | Organic light emitting display device and method of manufacturing the same |
| CN104658990B (en) | 2015-03-02 | 2017-05-17 | 京东方科技集团股份有限公司 | Packaging assembly and preparation method thereof |
| CN106200032B (en) * | 2015-05-05 | 2019-09-17 | 群创光电股份有限公司 | Display panel |
| CN105225611B (en) * | 2015-08-25 | 2018-01-26 | 上海和辉光电有限公司 | The preparation method of display screen structure and display device |
| JP2017147165A (en) * | 2016-02-19 | 2017-08-24 | 株式会社ジャパンディスプレイ | Display device |
| CN106960914B (en) | 2017-03-22 | 2018-10-19 | 京东方科技集团股份有限公司 | Encapsulating structure, display panel, display device and preparation method thereof |
| CN107425126B (en) | 2017-04-27 | 2019-09-10 | 京东方科技集团股份有限公司 | Pixel defines structure, organic luminescent device and its packaging method, display device |
| TWI634468B (en) * | 2017-08-18 | 2018-09-01 | 財團法人工業技術研究院 | Transparent display device |
| CN109980073B (en) * | 2017-12-27 | 2021-02-19 | Tcl科技集团股份有限公司 | Packaging film, preparation method thereof and photoelectric device |
| CN113053915A (en) * | 2021-03-08 | 2021-06-29 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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