CN100466328C - Organic light-emitting display panel - Google Patents
Organic light-emitting display panel Download PDFInfo
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- CN100466328C CN100466328C CNB2003101044174A CN200310104417A CN100466328C CN 100466328 C CN100466328 C CN 100466328C CN B2003101044174 A CNB2003101044174 A CN B2003101044174A CN 200310104417 A CN200310104417 A CN 200310104417A CN 100466328 C CN100466328 C CN 100466328C
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Abstract
The organic luminous display faceplate includes a base plate, at least an organic luminous zone, at least a protection layer, at least a barrier layer and an encapsulation layer. The said organic luminous zone is formed on the base plate, and the organic luminous zone possesses several pixels. The protection layer is formed on base plate and the organic luminous zone. The barrier layer is formed on the protection layer and/or base plate. The encapsulation layer formed on the base plate covers circumference of the barrier layer and/or 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 functions material (organic functional materials) reaches display effect, molecular weight difference according to the organic functions 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 functions 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 be utilize modes such as sputter, plasma-assisted chemical vapour deposition (PECVD) or electron beam directly with inoranic membrane 41 (as Si
xO
y) be deposited on the organic illuminating element 42.
In addition, as shown in Figure 2, U.S. Vitex System company also directly is deposited on inorganic/organic multilayer barrier layer structure 51 (Barix Coating) on the organic illuminating element 52, invades to organic illuminating element 52 to reach obstruct aqueous vapor and oxygen.
Yet aqueous vapor and oxygen are invaded the organic illuminating element from positive (A direction) except meeting, also invade to element via the edge (B direction) of barrier layer (inoranic membrane) easily.But two kinds of above-mentioned packaged types only can prevent aqueous vapor and oxygen from positive (A direction) invasion, and can't block aqueous vapor and oxygen (B direction) invasion from the side.
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, at least one barrier layer and an involution 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; Intercepting series of strata is formed on protective layer and/or the substrate; The involution layer is formed on the substrate, and the periphery of coating barrier layer and/or protective layer at least.
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 teat, at least one protective layer, at least one barrier layer and an involution layer, wherein, organic luminous zone is formed on the substrate, and organic luminous zone has several pixels; Teat is formed on the substrate; Protective layer is formed on substrate and the organic luminous zone; Barrier layer is formed on protective layer and/or the teat; The involution layer is formed on substrate and/or the teat, and the periphery of coating barrier layer and/or protective layer at least.
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; Protective layer is formed on substrate and the organic luminous zone; Barrier layer is formed on protective layer and the substrate, and wherein one deck of wherein one deck of protective layer and/or barrier layer forms with the photo chemical vapor deposition method.
From the above, organic electroluminescence display panel of the present invention utilizes barrier layer or involution layer to stop aqueous vapor and oxygen from the element front and side invasion.Compared with prior art, barrier layer of the present invention or involution layer are formed on protective layer and the substrate, can avoid aqueous vapor and oxygen to penetrate into element internal from the edge of protective layer.Simultaneously, protective layer of the present invention can avoid follow-up formed barrier layer or involution layer that discontinuous situation takes place, and further avoids aqueous vapor and oxygen to enter in the element via hole.In addition, teat of the present invention makes the involution layer present wavy structure, not only increase contact area and adhesive force between involution layer and the other parts (teat, substrate), the stress that reduces rising-heat contracting-cold simultaneously and produced, more can increase the path of aqueous vapor and oxygen penetration, thereby slow down the speed of aqueous vapor and oxygen invasion.Moreover the position that multilayer barrier layer of the present invention such as can stagger at hole between the barrier layer compensates the defective of rete effectively.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 between the barrier layer with higher young's modulus to produce the effect of buffering, with the stress between the barrier layers such as reduction.In addition, flatness layer, barrier layer or involution series of strata 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 that one of packaged type of existing organic illuminating element is implemented schematic diagram;
Fig. 2 is another enforcement schematic diagram of the packaged type of existing organic illuminating element;
Fig. 3, Fig. 4, Fig. 5 and Fig. 6 are one of organic electroluminescence display panel group schematic diagram in the first embodiment of the invention;
Fig. 7, Fig. 8, Fig. 9 and Figure 10 are one of organic electroluminescence display panel group schematic diagram in the second embodiment of the invention; And
Figure 11 and Figure 12 are one of organic electroluminescence display panel group schematic diagram in the third 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 function layers
1,213 second electrodes
13 protective layers
14,141,142,143 barrier layers
15 involution layers
2 organic electroluminescence display panels
21 substrates
22 organic luminous zone
221 pixels
2,211 first electrodes
2212 organic function layers
2,213 second electrodes
23 teats
24 protective layers
25 barrier layers
26 involution layers
3 organic electroluminescence display panels
31 substrates
32 organic luminous zone
321 pixels
3,211 first electrodes
3212 organic function layers
3,213 second electrodes
33 protective layers
34,341,342,343 barrier layers
41 inoranic membranes
42 organic illuminating elements
51 multilayer barrier layer structures
52 organic illuminating elements
Embodiment
Hereinafter with reference to relevant indicators, the organic electroluminescence display panel according to preferred embodiment of the present invention is described.For ease of explanation, after relevant indicators only is shown in single pixel.
First embodiment
As Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, the organic electroluminescence display panel 1 of first embodiment of the invention, comprise a substrate 11, at least one organic luminous zone 12, at least one protective layer 13, at least one barrier layer 14 and an involution layer 15, 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 protective layer 13 and/or the substrate 11; Involution layer 15 is formed on the substrate 11, and the periphery of coating barrier layer 14 and/or protective layer 13 at least.
In present embodiment, substrate 11 can be flexible (flexible) substrate or rigidity (rigid) substrate.In addition, substrate 11 can also be plastic cement (plastic) substrate or glass substrate or the like.Wherein, flexible base, board and plastic substrate can be Merlon (polycarbonate, PC) substrate, polyester (polyester, PET) substrate, cyclenes copolymer (cyclic olefincopolymer, COC) substrate or crome metal compound base material-cyclenes copolymer (metallocene-based cyclic olefin copolymer, mCOC) substrate.Certainly, substrate 11 can also be a silicon substrate.
In addition, please refer to Fig. 3 again, pixel 121 comprises one first electrode 1211, at least one organic function layer 1212 and one second electrode 1213 in regular turn, and first electrode 1211 is to be positioned on the substrate 11.
In present embodiment, first electrode 1211 is to utilize 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 function layer 1212 comprises a hole injection layer, a hole transport layer, a luminescent layer, an electron transfer layer and an electron injecting layer (not shown) usually.Wherein, organic function 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 function 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. 3 again, second electrode 1213 is positioned on the organic function layer 1212.In this, second electrode 1213 uses evaporation or sputter methods such as (sputtering) is formed on the organic function 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. 3 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 be formed on substrate 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 is to utilize 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.Certainly, protective layer 13 also can utilize sputtering method to be formed on substrate 11 and the organic luminous zone 12.
Please refer to Fig. 3 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 (barrier layer 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, but protective layer 13 existing particulate in the cladding process more.
In addition, please refer to Fig. 3 again, the protective layer 13 of present embodiment can avoid follow-up formed barrier layer 14 that discontinuous situation takes place, and makes aqueous vapor and oxygen enter via hole.
In present embodiment; protective layer 13 is an inorganic; and protective layer 13 be selected from Si oxide (SiOx), diamond like carbon film (Diamond Like Carbon, DLC), silicon nitride (SiNx), silicon oxynitride (SiOxNy) and alundum (Al (Al2O3) at least one of them.
Please refer to Fig. 3 again, the barrier layer 14 of present embodiment is formed on protective layer 13 and the substrate 11.Certainly, as Fig. 4, Fig. 5 and shown in Figure 6, barrier layer 14 also can be formed on the protective layer 13.
Wherein, barrier layer 14 can utilize the photo chemical vapor deposition method to form.Certainly, 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, diamond like carbon 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.
In addition, as shown in Figure 3, the one deck at least in several barrier layers 14 can utilize the photo chemical vapor deposition method to form.Certainly, wait the one deck at least in the barrier layer 14 can also utilize sputtering method to form.
In this, wait barrier layer 14 also can have water proofing property and pooling feature simultaneously.For example: as shown in Figure 3, barrier layer 141,143 (material such as silicon nitride, silicon oxynitride, diamond like carbon 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, the internal stress of barrier layer 14 such as can reduce effectively.This kind multilayered structure system can stagger and wait the position of hole between the barrier layer 14, compensates the defective of rete effectively, and what more make aqueous vapor in addition penetrates the path growth, further strengthens good waterproof effect.
In addition, please refer to Fig. 3 and Fig. 4 again, involution layer 15 is formed on the substrate 11, and the periphery of coating barrier layer 14 and/or protective layer 13 at least.Certainly, as Fig. 5 and shown in Figure 6, involution layer 15 also can be coated on barrier layer 14 and the protective layer 13 fully.
In present embodiment, involution layer 15 can utilize the photo chemical vapor deposition method to form.Certainly, involution layer 15 also can utilize sputtering method to form.
In present embodiment, involution layer 15 is an inorganic, and be selected from silica, diamond like carbon 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, involution layer 15 cording have water proofing property, can further improve the reliability of organic electroluminescence display panel 1.
Second embodiment
In addition, please refer to Fig. 7, Fig. 8, Fig. 9 and Figure 10 again, 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 teat 23, at least one protective layer 24, at least one barrier layer 25 and an involution layer 26, wherein, organic luminous zone 22 is formed on the substrate 21, and organic luminous zone 22 has several pixels 221; Teat 23 is formed on the substrate 21; Protective layer 24 is formed on substrate 21 and the organic luminous zone 22; Barrier layer 25 is formed on protective layer 24 and/or the teat 23; Involution layer 26 is formed on substrate 21 and/or the teat 23, and the periphery of coating barrier layer 25 and/or protective layer 24 at least.
In present embodiment, pixel 221 comprises one first electrode 2211, at least one organic function 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 function layer 2212 and second electrode 2213 is identical with the similar elements among the function and first embodiment, does not repeat them here.
Please refer to Fig. 7, Fig. 8, Fig. 9 and Figure 10 again, protective layer 24 can avoid follow-up formed barrier layer 25 that discontinuous situation takes place, and makes aqueous vapor and oxygen enter via hole.In addition, all the protective layer 13 with first embodiment is identical with function for the feature of protective layer 24, also repeats no more at this.
Then, please refer to Fig. 7, Fig. 8 and Fig. 9 again, barrier layer 25 is formed on the protective layer 24.Please refer to Figure 10 again, certainly, barrier layer 25 also can be formed on protective layer 24 and the teat 23.In present embodiment, all the barrier layer 14 with first embodiment is identical with function for all the other features of barrier layer 25, also repeats no more at this.
Please refer to Fig. 7, Fig. 8, Fig. 9 and Figure 10 again, teat 23 is formed on the substrate 21.In present embodiment, teat 23 interconnects (as shown in Figure 8).Certainly, teat 23 can also independently be provided with (as Fig. 7, Fig. 9 and shown in Figure 10).
In addition, in present embodiment, the material of teat 23 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 23 of present embodiment can be a bulk or rectangular bulk or the like.In addition, in present embodiment, as Fig. 7, Fig. 8, Fig. 9 and shown in Figure 10, teat 23 can avoid follow-up formed involution layer 26 that discontinuous situation takes place, and makes aqueous vapor and oxygen enter via hole.
Please refer to Fig. 7 and Figure 10 again, the periphery of involution layer 26 coating barrier layer 25 and/or protective layer 24.Certainly, as Fig. 8 and shown in Figure 9, involution layer 26 is coated on barrier layer 25, protective layer 24, teat 23 and the substrate 21 fully.Because the involution layer 26 of part is formed on the teat 23, make involution layer 26 present similar wavy structure, this kind structure has not only increased contact area and the adhesive force between involution layer 26 and the other parts (teat 23, substrate 21), the stress that reduces rising-heat contracting-cold simultaneously and produced, more can increase the path of aqueous vapor and oxygen penetration, thereby slow down the speed of aqueous vapor and oxygen invasion.
The 3rd embodiment
As Figure 11 and shown in Figure 12, organic electroluminescence display panel 3 according to third embodiment of the invention, comprise a substrate 31, at least one organic luminous zone 32, at least one protective layer 33 and at least one barrier layer 34, wherein, organic luminous zone 32 is formed on the substrate 31, and organic luminous zone 32 has several pixels 321; Protective layer 33 is formed on substrate 31 and the organic luminous zone 32; Barrier layer 34 is formed on protective layer 33 and the substrate 31, and wherein one deck of wherein one deck of protective layer 33 and/or barrier layer 34 (341,342,343) forms with the photo chemical vapor deposition method.
In present embodiment, pixel 321 comprises one first electrode 3211, at least one organic function layer 3212 and one second electrode 3213 in regular turn, and first electrode 3211 is positioned on the substrate 31.
In present embodiment; the feature of substrate 31, organic luminous zone 32, pixel 321, first electrode 3211, organic function layer 3212, second electrode 3213, protective layer 33 and barrier layer 34,341,342,343 and function all with first embodiment in similar elements identical, also repeat no more at this.
In present embodiment, more can comprise an involution layer (not shown) and be coated on barrier layer 34 and the substrate 31.
Organic electroluminescence display panel of the present invention utilizes barrier layer or involution layer to stop aqueous vapor and oxygen from the element front and side invasion.Compared with prior art, barrier layer of the present invention or involution layer are formed on protective layer and the substrate, can avoid aqueous vapor and oxygen to penetrate into element internal from the edge of protective layer.Simultaneously, protective layer can avoid follow-up formed barrier layer or involution layer that discontinuous situation takes place, and further avoids aqueous vapor and oxygen to enter in the element via hole.In addition, teat of the present invention makes the involution layer present wavy structure, not only increase contact area and adhesive force between involution layer and the other parts (teat, substrate), the stress that reduces rising-heat contracting-cold simultaneously and produced, more can increase the path of aqueous vapor and oxygen penetration, to slow down the speed of aqueous vapor and oxygen invasion.Moreover the position that multilayer barrier layer of the present invention can stagger hole between the barrier layer compensates the defective of rete effectively.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 between the barrier layer with higher young's modulus to produce the effect of buffering, to reduce the stress between the barrier layer.In addition, flatness layer, barrier layer or involution 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.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the accompanying claim its equivalent modifications of carrying out or change.
Claims (11)
1. 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 teat directly is formed on the zone that does not form described organic luminous zone of substrate surface;
At least one protective layer is formed on substrate and the organic luminous zone;
At least one barrier layer is formed on protective layer and/or the teat; And
One involution layer is formed on substrate and the teat, and the periphery of coating barrier layer and/or protective layer at least.
2. organic electroluminescence display panel as claimed in claim 1, wherein, pixel comprises one first electrode, at least one organic function layer and one second electrode in regular turn.
3. organic electroluminescence display panel as claimed in claim 1, wherein, the cross section of teat is a trapezoidal or rectangle.
4. organic electroluminescence display panel as claimed in claim 1, wherein, the material of teat is a waterproof material.
5. organic electroluminescence display panel as claimed in claim 1, wherein, protective layer, barrier layer and involution layer are inorganic.
6. organic electroluminescence display panel as claimed in claim 5, wherein, protective layer be selected from silica, diamond like carbon film, silicon nitride, silicon oxynitride and alundum (Al at least one of them.
7. organic electroluminescence display panel as claimed in claim 5, wherein, barrier layer and involution layer be selected from respectively silica, silicon nitride, diamond like carbon film, silicon oxynitride, alundum (Al and metal at least one of them.
8. organic electroluminescence display panel as claimed in claim 1, wherein, one deck at least of protective layer forms with the photo chemical vapor deposition method or with sputtering method.
9. organic electroluminescence display panel as claimed in claim 1, wherein, barrier layer and/or involution layer have water proofing property.
10. organic electroluminescence display panel as claimed in claim 1, wherein, one deck at least of barrier layer has resiliency.
11. organic electroluminescence display panel as claimed in claim 1, wherein, one deck at least of barrier layer forms with the photo chemical vapor deposition method or with sputtering method.
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| CNB2003101044174A CN100466328C (en) | 2003-10-29 | 2003-10-29 | Organic light-emitting display panel |
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| CNB2003101044174A CN100466328C (en) | 2003-10-29 | 2003-10-29 | Organic light-emitting display panel |
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| CN100466328C true CN100466328C (en) | 2009-03-04 |
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| US20020125822A1 (en) * | 1998-12-16 | 2002-09-12 | Graff Gordon L. | Environmental barrier material for organic light emitting device and method of making |
| US20020125866A1 (en) * | 2001-01-17 | 2002-09-12 | Stmicroelectronics, S.A. | Voltage regulator with an improved efficiency |
| US20030117068A1 (en) * | 2001-12-20 | 2003-06-26 | Stephen Forrest | Organic optoelectronic device structures |
| US20030164674A1 (en) * | 2002-01-15 | 2003-09-04 | Seiko Epson Corporation | Sealing structure with barrier membrane for electronic element, display device, electronic apparatus, and fabrication method for electronic element |
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| CN1612650A (en) | 2005-05-04 |
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