CN1505442A - Packaging structure of organic electroluminescent cell and making process thereof - Google Patents
Packaging structure of organic electroluminescent cell and making process thereof Download PDFInfo
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- CN1505442A CN1505442A CNA021536813A CN02153681A CN1505442A CN 1505442 A CN1505442 A CN 1505442A CN A021536813 A CNA021536813 A CN A021536813A CN 02153681 A CN02153681 A CN 02153681A CN 1505442 A CN1505442 A CN 1505442A
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Abstract
The invention is a kind of sealing structure of the organic electric laser element and the manufacturing craft. It uses a multi-hole drier into the sealing structure of the organic electric laser element. The drier is produced through hydraulic drier configuration, foam generating process, and solidification craft. The drier is made up of solid hardened glue with form and several drier particles or power dispersed in the glue. The glue also may contain foam generating agent. The foams in the drier can enhance the water and oxygen absorption rate and the area, enhances the absorption efficiency of water and oxygen.
Description
Technical field
The invention relates to a kind of organic electroluminescent element (Organic Light EmittingDevice, OLED or Organic Electro luminescence, OEL) encapsulating structure and manufacture craft thereof, and particularly relevant for a kind of encapsulating structure and manufacture craft thereof with organic electroluminescent element of porousness drier (porous desiccant).
Background technology
The information communication industry has become main flow industry now, and particularly portable various communication shows the emphasis that product develops especially, and behave communication interface with information of flat-panel screens, so its development particular importance that seems.The technology that is applied in flat-panel screens now mainly contains following several: plasma scope (Plasna Display Panel, PDP), LCD (Liquid Crystal Display, LCD), inorganic EL display (Electro-luminescent Display), light-emitting diode (Light Emitting Diode, LED), vacuum fluorescent display (Vacuum FluorescentDisplay), field-emitter display (Field Emission Display, FED) and electrochromics display (Electro-chromic Display) etc.
Compared to other plane Display Technique, advantages such as organic electroluminescent element is interdependent with its self-luminous, no visual angle, power saving, manufacture craft are simple and easy, low-cost, low operating temperature scope, high answer speed and full-colorization and have great application potential are expected to become the main flow of follow-on flat-panel screens.
Organic illuminating element is the element that a kind of self luminous characteristic of utilizing organic functional material (organic functionalmaterials) reaches display effect, can be divided into micromolecule organic illuminating element (small molecule OLED according to the molecular weight difference of organic functional material, SM-OLED) with macromolecule organic illuminating element (polymer light-emitting device, PLED) two big classes.Its ray structure is made of pair of electrodes and organic functional material layer.Between electric current is by transparent anode and metallic cathode, make electronics and electric hole in the organic functional material layer in conjunction with and when producing exciton, just can make the organic functional material layer according to its properties of materials, and produce the mechanism of giving out light of different colours.
Fig. 1 illustrates the encapsulating structure schematic diagram into known organic electroluminescent element.Please refer to Fig. 1, the encapsulation of organic electroluminescent element mainly under inert gas environment, provides a substrate 100, has multilayer organic electric-excitation luminescent film 102 on it, then fluid sealant 104 is coated on substrate 100 surfaces, this fluid sealant 104 is surrounded on around the organic electric-excitation luminescent film 102.One cover plate 106 then is provided, and cover plate 106 and substrate 100 are carried out the contraposition pressing, in by cover plate 106, substrate 100 and fluid sealant 104 organic electric-excitation luminescent film 102 being sealed in.
Yet, because fluid sealant is a macromolecular material, and can't block the infiltration of external environment moisture and oxygen fully, and organic functional material in the organic electroluminescent element structure and negative electrode very easily with moisture and oxygen reaction, cause the life-span of organic electroluminescent element can't reach commercial demand.Has decisive influence because be worth for entire product the useful life of organic electroluminescent element, industrial circle is devoted to develop the packaging manufacturing process technology of element invariably, with the influence of guaranteeing that electrode in the organic electroluminescent element and luminescent material are not infiltrated by moisture or oxygen etc.So at US6,226, a kind of method for packing of organic electroluminescent element is promptly disclosed in 890, its mainly be utilize one by desiccant particle (desiccant particle) with link agent (binder) and mix the drier of being formed and absorb moisture or the oxygen that infiltrates in the packaging body.The making of above-mentioned drier mixes the link agent of desiccant particle with liquid state earlier, again this liquid desiccant is coated afterwards on the encapsulation required cover plate (cover plate) or other carrier (support), again it is solidified to form a solid film at last.
Can be coated by the link agent because the desiccant particle in the solid film has partly, the moisture and the oxygen that cause infiltrating in the packaging body can't be absorbed by the drier in the solid film fast and effectively.In other words, the moisture and the oxygen of the interior existence of packaging body in the early stage, the low absorption performance of desiccant particle can make that still organic electroluminescent element is subjected to destruction to a certain degree; Moreover, organic electroluminescent element is the plane display element of filming, in the very thin structure of component thickness own, space that can the agent of holding solid particle drying is just very limited, so for the moisture of the drier height more next than other display with the requirement of oxygen absorption usefulness, and tradition is used for the solid particle drier of display also can't satisfy organic electroluminescent element fully in the feature of moisture and oxygen absorption usefulness and non-flattening demand.
Summary of the invention
Therefore, first purpose of the present invention is in the encapsulating structure and the manufacture craft thereof that propose a kind of organic electroluminescent element, it utilizes the porousness drier can promote the absorption usefulness of moisture and oxygen greatly, and the characteristic of fast Absorption moisture and oxygen is to promote the life-span of organic electroluminescent element.
Second purpose of the present invention is proposing a kind of porousness drier, and it has bigger contact area with extraneous, thus can be fast and absorb moisture and oxygen effectively, promote the absorption usefulness of moisture and oxygen greatly.
The 3rd purpose of the present invention is proposing a kind of porousness drier manufacture method, it foams by blowing agent or other chemical action makes to have numerous air-bubble in the porousness drier, moisturize and the oxygen adsorption area, and then desiccant particle promotes the absorption usefulness of moisture and oxygen to the absorbability of moisture and oxygen in the enhancement porousness drier.
The 4th purpose of the present invention is proposing a kind of porousness drier manufacture method, it makes the porousness drier have numerous air-bubble by the mode that the mode or other the physical property of gas injection produce bubble, moisturize and the oxygen adsorption area, and then desiccant particle promotes the absorption usefulness of moisture and oxygen to the absorbability of moisture and oxygen in the enhancement porousness drier.
For reaching above-mentioned purpose, the present invention proposes a kind of encapsulating structure of organic electroluminescent element, mainly is made of a substrate, a cover plate, a porousness drier and a fluid sealant.Wherein, has an organic electroluminescent element on the substrate; Cover plate is disposed at the substrate top; The porousness drier for example is disposed on the cover plate, this porousness drier for example is made up of a solid-state sclerosis glue and an a plurality of desiccant particle or the powder that is scattered in the solid-state sclerosis glue with bubble, in addition, also may have blowing agent in the solid-state sclerosis glue exists; Fluid sealant then is disposed between substrate and the cover plate, and in substrate, cover plate and fluid sealant be sealed in organic electroluminescent element and porousness drier.
For reaching above-mentioned purpose, the present invention proposes a kind of packaging manufacturing process of organic electroluminescent element, comprises the following steps: that (a) provides a substrate, has an organic electroluminescent element on this substrate; (b) provide a cover plate; (c) provide a liquid desiccant, wherein liquid desiccant for example by a liquid sclerosis glue, a plurality ofly be scattered in the blowing agent that desiccant particle in the liquid sclerosis glue or powder and be scattered in the liquid sclerosis glue and formed; (d) liquid desiccant being formed on the cover plate, for example is the mode with coating or ink-jet; (e) make the blowing agent in the liquid desiccant foam, and liquid desiccant solidified, to form a porousness drier, wherein the porousness drier for example is made up of a solid-state sclerosis glue and an a plurality of desiccant particle or the powder that is scattered in the solid-state sclerosis glue with bubble, in addition, may have residual blowing agent in the solid-state sclerosis glue exists; And (f) between substrate and cover plate, form a fluid sealant, in by substrate, cover plate and fluid sealant organic electroluminescent element and porousness drier being sealed in.
For reaching above-mentioned purpose, the present invention proposes a kind of manufacture method of porousness drier, comprise the following steps: that (a) provides a liquid desiccant, wherein liquid desiccant for example by a liquid sclerosis glue, a plurality ofly be scattered in the blowing agent that desiccant particle in the liquid sclerosis glue or powder and be scattered in the liquid sclerosis glue and constituted; (b) liquid desiccant is formed on the carrier; And (c) make the blowing agent in the liquid desiccant foam; and liquid desiccant solidified; to form the porousness drier, wherein the porousness drier for example is made up of a solid-state sclerosis glue and an a plurality of desiccant particle or the powder that is scattered in the solid-state sclerosis glue with bubble.In addition, may have residual blowing agent in the solid-state sclerosis glue exists.
Can further have at least one groove on the edge of above-mentioned cover plate or carrier, in order to limit the scope of fluid sealant configuration, it is wide too slightly or too thin problem to improve glue, promotes the water-resisting property of adhesion and fluid sealant between cover plate and the substrate.
Among the present invention, blowing agent for example is liquid blowing agent or solid-state blowing agent, its material comprises pentamethylene, Chlorofluorocarbons (CFCs), azo-compound, and this blowing agent for example by the heating or the mode of UV-irradiation produces nitrogen or other inert gas, to reach the purpose of foaming; The material of desiccant particle or powder for example is suitable for absorbing the material of moisture and oxygen for barium monoxide (BaO) or other; And the material of liquid sclerosis glue for example is thermmohardening glue or UV cured glue etc., and it can by heating or the mode of UV-irradiation be solidified into solid-state sclerosis glue.
Among the present invention, if blowing agent and liquid sclerosis glue are to foam when solidifying by the heating or the mode of UV-irradiation equally, then foaming can be carried out synchronously with the action of solidifying.In addition, if the mode that blowing agent foams is inequality with the mode that liquid sclerosis glue is cured, foam as the mode of blowing agent by heating, and under the situation that the mode of liquid sclerosis glue (UV cured glue) by UV-irradiation is cured, or the mode of blowing agent by UV-irradiation foams, and under the situation that the mode of liquid sclerosis glue (thermmohardening glue) by heating is cured, then earlier blowing agent is foamed, carry out the action of liquid sclerosis adhesive curing again.
For reaching above-mentioned purpose, the present invention proposes a kind of encapsulating structure of organic electroluminescent element, mainly is made of a substrate, a cover plate, a porousness drier and a fluid sealant.Wherein, has an organic electroluminescent element on the substrate; Cover plate is disposed at the substrate top; The porousness drier for example is disposed on the cover plate, and this porousness drier for example is made up of a solid-state sclerosis glue and an a plurality of desiccant particle or the powder that is scattered in the solid-state sclerosis glue with bubble; Fluid sealant then is disposed between substrate and the cover plate, and in substrate, cover plate and fluid sealant be sealed in organic electroluminescent element and porousness drier.
For reaching above-mentioned purpose, the present invention proposes a kind of packaging manufacturing process of organic electroluminescent element, comprises the following steps: that (a) provides a substrate, has an organic electroluminescent element on this substrate; (b) provide a cover plate; (c) provide a liquid desiccant, wherein liquid desiccant for example is made up of a liquid sclerosis glue and a plurality of desiccant particle or powder that is scattered in the liquid sclerosis glue; (d) liquid desiccant being formed on the cover plate, for example is the mode with coating or ink-jet; (e) mode of injecting by gas forms bubble in liquid desiccant; (f) liquid desiccant is solidified, to form a porousness drier, wherein the porousness drier for example is made of a solid-state sclerosis glue and an a plurality of desiccant particle or the powder that is scattered in the solid-state sclerosis glue with bubble; And (g) between substrate and cover plate, form a fluid sealant, in by substrate, cover plate and fluid sealant organic electroluminescent element and porousness drier being sealed in.
For reaching above-mentioned purpose, the present invention proposes a kind of manufacture method of porousness drier, comprise the following steps: that (a) provides a liquid desiccant, wherein liquid desiccant for example is made of a liquid sclerosis glue and a plurality of desiccant particle or powder that is scattered in the liquid sclerosis glue; (b) liquid desiccant is formed on the carrier; (c) mode of injecting by gas forms bubble in liquid desiccant; And (d) with liquid desiccant curing, to form the porousness drier, wherein the porousness drier for example is made up of a solid-state sclerosis glue and an a plurality of desiccant particle or the powder that is scattered in the solid-state sclerosis glue with bubble.
For reaching above-mentioned purpose, the present invention proposes a kind of porousness drier, mainly is made of a solid-state sclerosis glue and an a plurality of desiccant particle or the powder that is scattered in the solid-state sclerosis glue with bubble.In addition, also may have blowing agent in the solid-state sclerosis glue exists.
Can further have at least one groove on the edge of above-mentioned cover plate or carrier, in order to limit the scope of fluid sealant configuration, it is wide too slightly or too thin problem to improve glue, promotes the water-resisting property of adhesion and fluid sealant between cover plate and the substrate.
Among the present invention, the material of desiccant particle or powder for example is suitable for absorbing the material of moisture and oxygen for barium monoxide or other; And the material of liquid sclerosis glue for example is thermmohardening glue or UV cured glue etc., and it can by heating or the mode of UV-irradiation be solidified into solid-state sclerosis glue.
Among the present invention, the bubble in the liquid desiccant injects by a gas or other physical property mode forms, and this gas injects for example with inert gas injection liquid desiccant.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:
Description of drawings
Fig. 1 illustrates the encapsulating structure schematic diagram into known organic electroluminescent element;
Fig. 2 A to Fig. 2 D illustrates and is the encapsulation schematic flow sheet according to the present invention's first preferred embodiment organic electroluminescent element;
Fig. 3 A to Fig. 3 D illustrates and is the encapsulation schematic flow sheet according to the present invention's first preferred embodiment organic electroluminescent element;
Fig. 4 illustrates and is the making flow chart according to the present invention's first preferred embodiment porousness drier;
Fig. 5 illustrates and is different its hydroscopicities of kenel drier and time relation figure;
Fig. 6 illustrates the graph of a relation into heating time and formed bubble size;
Fig. 7 A to Fig. 7 D illustrates and is the encapsulation schematic flow sheet according to the present invention's second preferred embodiment organic electroluminescent element;
Fig. 8 A to Fig. 8 D illustrates and is the encapsulation schematic flow sheet according to the present invention's second preferred embodiment organic electroluminescent element;
Fig. 9 illustrates and is the making flow chart according to the present invention's second preferred embodiment porousness drier;
Figure 10 A to Figure 10 D illustrates the schematic diagram that distributes into according to groove on the cover plate of the present invention.
Label declaration:
100,200,400: substrate 102,202,402: organic electric-excitation luminescent film
104,204,404: fluid sealant 106,206,406: cover plate
208,408: liquid desiccant 208a, 408a: liquid sclerosis glue
208b, 408b: desiccant particle 208c: blowing agent
210,410: porousness drier 210a, 410a: solid-state sclerosis glue
210b, 410b: desiccant particle 210c: blowing agent
210d, 410c: bubble 206a, 406a: groove
407: groove S300～S306: the making flow process of porousness drier
S500～S506: the making flow process of porousness drier
Embodiment
First preferred embodiment
Fig. 2 A to Fig. 2 D illustrates and is the encapsulation schematic flow sheet according to the present invention's first preferred embodiment organic electroluminescent element.Please refer to Fig. 2 A, a substrate 200 at first is provided, have an organic electric-excitation luminescent film 202 on this substrate 200.Wherein, organic electric-excitation luminescent film 202 for example is transparent anode, metallic cathode, organic electric-excitation luminescent layer, electron transfer layer (ETL), electric hole transport layer (HTL), electron injecting layer (EIL), electric hole implanted layer (HIL) etc.In addition, organic electric-excitation luminescent film 202 for example is micromolecule luminous organic material or macromolecule luminous organic material.
Then please refer to Fig. 2 B, one cover plate 206 is provided, and on cover plate 206, form a liquid desiccant 208, its generation type for example is the mode with coating or ink-jet, and this liquid desiccant 208 for example is made up of the blowing agent 208c that a liquid sclerosis glue 208a, a plurality of desiccant particle 208b and that is scattered among the liquid sclerosis glue 208a are scattered among the liquid sclerosis glue 208a.Wherein, the material of liquid sclerosis glue 208a for example is thermmohardening glue or UV cured glue etc., and it can reach the purpose of curing by the heating or the mode of UV-irradiation; The material of desiccant particle 208b for example is suitable for absorbing the material of moisture and oxygen for barium monoxide or other; And blowing agent 208c for example is liquid blowing agent or solid-state blowing agent, and its material comprises pentamethylene, Chlorofluorocarbons (CFCs), azo-compound.In addition, blowing agent 208c for example can by the heating or the mode of UV-irradiation produces nitrogen or other inert gas, to reach the purpose of foaming.
Then please be simultaneously with reference to Fig. 2 B and Fig. 2 C, after forming liquid desiccant 208, make blowing agent 208c foaming by the heating or the mode of UV-irradiation, then make liquid sclerosis glue 208a be cured as solid-state sclerosis glue 210a with the heating or the mode of UV-irradiation again, to form a porousness drier 210.At this moment, porousness drier 210 for example is made up of a solid-state sclerosis glue 210a and a plurality of desiccant particle 210b who is scattered among the solid-state sclerosis glue 210a with bubble 210d, and the size of these bubbles is for example between between 10 dusts to 1 micron.In addition, may there be the afterwards residual blowing agent 210c of a little foaming to exist among the solid-state sclerosis glue 210a.
In the present embodiment, still can do some between foaming manufacture craft and curing manufacture craft integrates and variation, below promptly be further described, but also non-limiting the present invention must use the heating or the mode of UV-irradiation to foam and solidify at the relation between the two.
When blowing agent 208c and liquid sclerosis glue 208a are that mode by heating foams when solidifying equally, then foaming can be carried out synchronously with the action of solidifying.Similarly, when blowing agent 208c and liquid sclerosis glue 208a are that mode by UV-irradiation foams when solidifying equally, foaming also can be carried out synchronously with the action of solidifying.Otherwise, the mode that foams as blowing agent 208c is inequality with the mode that liquid sclerosis glue 208a is cured, foam by the mode of heating as blowing agent 208c, and under the situation that the mode of liquid sclerosis glue 208a (UV cured glue) by UV-irradiation is cured, or the mode of blowing agent 208c by UV-irradiation foams, and under the situation that the mode of liquid sclerosis glue 208a (thermmohardening glue) by heating is cured, then earlier blowing agent 208c is foamed, carry out the action that liquid sclerosis glue 208a solidifies again.
Then please refer to Fig. 2 D, between substrate 200 and cover plate 206, form a fluid sealant 204, will have in organic electric-excitation luminescent film 202 and porousness drier 210 be sealed in by substrate 200, cover plate 206 and fluid sealant 204.In the present embodiment, because porousness drier 210 has numerous air-bubble 210d,, these can make that desiccant particle 210b can be effectively and will infiltrate apace or script is present in packaging body interior moisture and oxygen absorption so being dispersed in bubble 210d among the solid-state sclerosis glue 210a.
Please refer to Fig. 2 D equally, the encapsulating structure of the organic electroluminescent element of present embodiment mainly is made of a substrate 200, a cover plate 206, a porousness drier 210 and a fluid sealant 204.Wherein, has an organic electric-excitation luminescent film 202 on the substrate 200; Cover plate 206 is disposed at substrate 200 tops; Porousness drier 210 for example is disposed on the cover plate 206, this porousness drier 210 for example is made up of a solid-state sclerosis glue 210a and a plurality of desiccant particle 210b who is scattered among the solid-state sclerosis glue 210a with bubble 210d, in addition, also may have blowing agent 210c among the solid-state sclerosis glue 210a exists; Fluid sealant 204 then is disposed between substrate 200 and the cover plate 206, and in substrate 200, cover plate 206 and fluid sealant 204 be sealed in organic electric-excitation luminescent film 202 and porousness drier 210.
Fig. 3 A to Fig. 3 D illustrates and is the encapsulation schematic flow sheet according to the present invention's first preferred embodiment organic electroluminescent element.Please refer to Fig. 3 A to Fig. 3 D, present embodiment and the described manufacture craft difference of above-mentioned Fig. 2 A to Fig. 2 D are to have groove 206a on the cover plate 206, and liquid desiccant 208 is made among the groove 206a.With regard to encapsulating structure, difference only is that porousness drier 210 is disposed among the groove 206a of cover plate 206, and the thinning on thickness has very big benefiting for packaging body.
The foregoing description is that example describes at the encapsulating structure that the porousness drier is applied to organic electroluminescent element, yet, being familiar with this operator should know, the porousness drier that present embodiment proposed with and manufacture method also can be applicable to other need field with moisture or GAS ABSORPTION or removal on.
Fig. 4 illustrates and is the making flow chart according to the present invention's first preferred embodiment porousness drier.Please refer to Fig. 4, the porousness drier of present embodiment still can be made on the carrier separately, one liquid desiccant (S300) at first is provided, wherein liquid desiccant for example is made of the blowing agent that a liquid sclerosis glue, a plurality of desiccant particle and that is scattered in the liquid sclerosis glue are scattered in the liquid sclerosis glue, then liquid desiccant is formed at (S302) on the carrier, make the blowing agent in the liquid desiccant foam (S304) afterwards, and liquid desiccant is cured as porousness drier (S306).Porousness drier behind overcuring for example is made up of a solid-state sclerosis glue and a plurality of desiccant particle that is scattered in the solid-state sclerosis glue with bubble.In addition, may have unreacted in the solid-state sclerosis glue and residual blowing agent existence.
Fig. 5 illustrates and is different its hydroscopicities of kenel drier and time relation figure; And show the hydroscopicity that tabular first goes out different kenel drier.Please be simultaneously with reference to Fig. 5 and table one, sample A, B, C, D, E are that different desiccant particles (comprising barium monoxide) add the fixedly UV glue and the blowing agent of mixed proportion, and sample F (being equivalent to US 6,226,890 drier) is added UV glue for the barium monoxide particle.The hydroscopicity of sample A～sample F measures after 30 minutes in test.By Fig. 5 and table one as can be known, sample A, B, C, D, E are better than the moisture sorption effect of sample F.Compared to sample F, the porousness drier of this case is because of having than large contact surface long-pending (bubble), so comparatively excellent really on moisture sorption effect.
Table one
| Sample | The drier composition | Hydroscopicity (wt%) |
| ????A | Sclerosis glue+blowing agent+desiccant particle 1 | ????4 |
| ????B | Sclerosis glue+blowing agent+ | ????1 |
| ????C | Sclerosis glue+blowing agent+ | ????3.5 |
| ????D | Sclerosis glue+blowing agent+desiccant particle 4 | ????1.5 |
| ????E | Sclerosis glue+blowing agent+ | ????2 |
| ????F | Sclerosis glue+barium monoxide particle | ????0.7 |
Fig. 6 illustrates the graph of a relation into heating time and formed bubble size.Please refer to Fig. 6, blowing agent is heated or UV-irradiation can begin foaming afterwards, and the result's (bubble size) after its foaming is with relevant with the heating or the situation of UV-irradiation.In Fig. 6, enumerated the influence of heating-up temperature and heating time to bubble size, under the heating state of 80 degree (broken line B) Celsius, heating time is long more, bubble size has increase by a small margin, and under the heating state of 100 (broken line A), heating time is long more, and bubble size will have increase by a relatively large margin.
Second preferred embodiment
Fig. 7 A to Fig. 7 D illustrates and is the encapsulation schematic flow sheet according to the present invention's second preferred embodiment organic electroluminescent element.Please refer to Fig. 7 A, a substrate 400 at first is provided, have multilayer organic electric-excitation luminescent film 402 on this substrate 400.Wherein, organic electric-excitation luminescent film 402 for example is transparent anode, metallic cathode, organic electric-excitation luminescent layer, electron transfer layer (ETL), electric hole transport layer (HTL), electron injecting layer (EIL), electric hole implanted layer (HIL) etc.In addition, organic electric-excitation luminescent film 402 for example is micromolecule luminous organic material or macromolecule luminous organic material.
Then please refer to Fig. 7 B, one cover plate 406 is provided, and on cover plate 406, form a liquid desiccant 408, its generation type for example is the mode with coating or ink-jet, and this liquid desiccant 408 for example is made up of a liquid sclerosis glue 408a and a plurality of desiccant particle 408b that is scattered among the liquid sclerosis glue 408a.Wherein, the material of liquid sclerosis glue 408a for example is thermmohardening glue or UV cured glue etc., and it can reach the purpose of curing by the heating or the mode of UV-irradiation; And the material of desiccant particle 408b for example is suitable for absorbing the material of moisture and oxygen for barium monoxide or other.
Then please be simultaneously with reference to Fig. 7 B and Fig. 7 C, after forming liquid desiccant 408, rely on the gas injection or the mode of other physical property in liquid desiccant 408 injecting gas, then make liquid sclerosis glue 408a be cured as solid-state sclerosis glue 410a with the heating or the mode of UV-irradiation again, to form a porousness drier 410.Because the cause that gas injects, the porousness drier 410 after the curing can be made up of a solid-state sclerosis glue 410a and a plurality of desiccant particle 410b who is scattered among the solid-state sclerosis glue 410a with bubble 410c.The size of above-mentioned bubble is for example between between 10 dusts to 1 micron.
Then please refer to Fig. 7 D, between substrate 400 and cover plate 406, form a fluid sealant 404, in by means of substrate 400, cover plate 406 and fluid sealant 404 organic electric-excitation luminescent film 402 and porousness drier 410 being sealed in.In the present embodiment, because porousness drier 410 has numerous air-bubble 410c,, these can make that desiccant particle 410b can be effectively and will infiltrate apace or script is present in packaging body interior moisture and oxygen absorption so being dispersed in bubble 410c among the solid-state sclerosis glue 410a.
Please refer to Fig. 7 D equally, the encapsulating structure of the organic electroluminescent element of present embodiment mainly is made of a substrate 400, a cover plate 406, a porousness drier 410 and a fluid sealant 404.Wherein, has multilayer organic electric-excitation luminescent film 402 on the substrate 400; Cover plate 406 is disposed at substrate 400 tops; Porousness drier 410 for example is disposed on the cover plate 406, and this porousness drier 410 for example is made up of a solid-state sclerosis glue 410a and a plurality of desiccant particle 410b who is scattered among the solid-state sclerosis glue 410a with bubble 410c; Fluid sealant 404 then is disposed between substrate 400 and the cover plate 406, and in substrate 400, cover plate 406 and fluid sealant 404 be sealed in organic electric-excitation luminescent film 402 and porousness drier 410.
Fig. 8 A to Fig. 8 D illustrates and is the encapsulation schematic flow sheet according to the present invention's second preferred embodiment organic electroluminescent element.Please refer to Fig. 7 A to Fig. 8 D, present embodiment and the described manufacture craft difference of above-mentioned Fig. 7 A to Fig. 7 D are to have groove 406a on the cover plate 406, and liquid desiccant 408 is made among the groove 406a.With regard to encapsulating structure, difference only is that porousness drier 410 is disposed among the groove 406a of cover plate 406, and the thinning on thickness has very big benefiting for packaging body.
The foregoing description is that example describes at the encapsulating structure that the porousness drier is applied to organic electroluminescent element, yet, being familiar with this operator should know, the porousness drier that present embodiment proposed with and manufacture method also can be applicable to other need field with moisture or GAS ABSORPTION on.
Fig. 9 illustrates and is the making flow chart according to the present invention's second preferred embodiment porousness drier.Please refer to Fig. 9, the porousness drier of present embodiment still can be made on the carrier separately, one liquid desiccant (S500) at first is provided, wherein liquid desiccant is for example by a liquid sclerosis glue and a plurality of desiccant particle that is scattered in the liquid sclerosis glue, then liquid desiccant is formed at (S502) on the carrier, in liquid desiccant, form bubble (S504) with the gas injection mode afterwards, and liquid desiccant is cured as porousness drier (S506).Porousness drier behind overcuring for example is made up of a solid-state sclerosis glue and a plurality of desiccant particle that is scattered in the solid-state sclerosis glue with bubble.
Shown in Figure 10 A to Figure 10 D, the arrangement kenel of groove 407 is for example formed by a continuous frame shape groove (illustrating as Figure 10 A) or a plurality of interrupted straight-line groove (illustrating as Figure 10 B and Figure 10 C) or by continuous frame shape groove (being illustrated as Figure 10 D) on the cover plate 406.
In sum, the present invention has following advantages at least:
1. porous drier of the present invention can be fast and is effectively absorbed moisture and the oxygen that infiltrates or originally be present in packaging body, moisturize and the Oxygen Adsorption area, greatly promote the absorption usefulness of moisture and oxygen, so can promote the life-span of organic electroluminescent element.
2. porous drier of the present invention only need be through liquid desiccant coating, Bubble formation manufacture craft (manufacture craft that for example foams or gas inject manufacture craft), and solidify manufacture craft and can finish making, be easy to do combination with product making.
Claims (28)
1, a kind of encapsulating structure of organic electroluminescent element is characterized in that: comprising:
One substrate has at least one organic electric-excitation luminescent film on this substrate;
One cover plate is disposed at this substrate top;
One porousness drier is disposed on this cover plate, and wherein this porousness drier comprises that one has solid-state sclerosis glue and a plurality of desiccant particle or powder that is scattered in this solid-state sclerosis glue of bubble;
One fluid sealant is disposed between this substrate and this cover plate, and wherein this substrate, this cover plate and sealing glue are with those organic electric-excitation luminescent films and the sealing of this porousness drier.
2, the encapsulating structure of organic electroluminescent element as claimed in claim 1 is characterized in that: also comprise a blowing agent in this porousness drier, and this blowing agent is scattered in this solid-state sclerosis glue.
3, the encapsulating structure of organic electroluminescent element as claimed in claim 2 is characterized in that: the material of this blowing agent be selected from pentamethylene, Chlorofluorocarbons (CFCs), azo-compound at least one of them.
4, the encapsulating structure of organic electroluminescent element as claimed in claim 2 is characterized in that: this blowing agent is liquid blowing agent or solid-state blowing agent.
5, the encapsulating structure of organic electroluminescent element as claimed in claim 1 is characterized in that: the material of those desiccant particles or powder comprises barium monoxide.
6, the encapsulating structure of organic electroluminescent element as claimed in claim 1 is characterized in that: the material of this solid-state sclerosis glue comprises thermmohardening glue or UV cured glue.
7, the encapsulating structure of organic electroluminescent element as claimed in claim 1 is characterized in that: comprise also on this cover plate that a groove, this groove are suitable for disposing this porousness drier.
8, the encapsulating structure of organic electroluminescent element as claimed in claim 1 is characterized in that: also comprise at least one groove on this cover plate, this groove limits fluid sealant configuration scope.
9, a kind of packaging manufacturing process of organic electroluminescent element is characterized in that: comprising:
One substrate is provided, has at least one organic electric-excitation luminescent film on this substrate;
One cover plate is provided;
One liquid desiccant is provided, and wherein this liquid desiccant comprises a liquid sclerosis glue and a plurality of desiccant particle or powder that is scattered in this liquid state sclerosis glue;
This liquid desiccant is formed on this cover plate;
In this liquid desiccant, form bubble;
This liquid desiccant is solidified, and to form a porousness drier, wherein this porousness drier comprises that one has solid-state sclerosis glue and a plurality of desiccant particle or powder that is scattered in this solid-state sclerosis glue of bubble;
Between this substrate and this cover plate, form a fluid sealant, rely on this substrate, this cover plate and sealing glue those organic electric-excitation luminescent films and the sealing of this porousness drier.
10, the packaging manufacturing process of organic electroluminescent element as claimed in claim 9 is characterized in that: the bubble in this liquid desiccant rely on to add a blowing agent, and makes this blowing agent foaming and form.
11, the packaging manufacturing process of organic electroluminescent element as claimed in claim 10 is characterized in that: the material of this blowing agent be selected from pentamethylene, Chlorofluorocarbons (CFCs), azo-compound at least one of them.
12, the packaging manufacturing process of organic electroluminescent element as claimed in claim 10 is characterized in that: this blowing agent relies on the mode of heating or UV-irradiation to foam.
13, the packaging manufacturing process of organic electroluminescent element as claimed in claim 10 is characterized in that: this blowing agent foams and the curing of this liquid state sclerosis glue is carried out synchronously.
14, the packaging manufacturing process of organic electroluminescent element as claimed in claim 10 is characterized in that: this blowing agent is foaming in advance, then should just solidify by liquid state sclerosis glue.
15, the packaging manufacturing process of organic electroluminescent element as claimed in claim 9 is characterized in that: the mode that the bubble in this liquid desiccant relies on a gas to inject forms.
16, the packaging manufacturing process of organic electroluminescent element as claimed in claim 15 is characterized in that: this gas injects an inert gas is injected this liquid desiccant.
17, a kind of porousness drier is characterized in that: comprising:
One has the solid-state sclerosis glue of bubble;
A plurality of desiccant particles or powder, those desiccant particles or powder are scattered in this solid-state sclerosis glue.
18, porousness drier as claimed in claim 17 is characterized in that: also comprise a blowing agent in this porousness drier, and this blowing agent is scattered in this solid-state sclerosis glue.
19, porousness drier as claimed in claim 18 is characterized in that: the material of this blowing agent be selected from pentamethylene, Chlorofluorocarbons (CFCs), azo-compound at least one of them.
20, porousness drier as claimed in claim 18 is characterized in that: this blowing agent is liquid blowing agent or solid-state blowing agent.
21, porousness drier as claimed in claim 17, it is characterized in that: the material of those desiccant particles or powder comprises barium monoxide.
22, porousness drier as claimed in claim 17 is characterized in that: the material of this solid-state sclerosis glue comprises thermmohardening glue or UV cured glue.
23, a kind of manufacture method of porousness drier is characterized in that: comprising:
One liquid desiccant is provided, and wherein this liquid desiccant comprises a liquid sclerosis glue and a plurality of desiccant particle or powder that is scattered in this liquid state sclerosis glue;
This liquid desiccant is formed on the carrier;
In this liquid desiccant, form bubble; and with this liquid desiccant curing; to form this porousness drier, wherein this porousness drier comprises that one has solid-state sclerosis glue and a plurality of desiccant particle or powder that is scattered in this solid-state sclerosis glue of bubble.
24, the manufacture method of porousness drier as claimed in claim 23 is characterized in that: the bubble in this liquid desiccant rely on to add a blowing agent, and makes this blowing agent foaming and form.
25, the manufacture method of porousness drier as claimed in claim 24 is characterized in that: the material of this blowing agent be selected from pentamethylene, Chlorofluorocarbons (CFCs), azo-compound at least one of them.
26, the manufacture method of porousness drier as claimed in claim 24 is characterized in that: this blowing agent relies on the mode of heating or UV-irradiation to foam.
27, the manufacture method of porousness drier as claimed in claim 24 is characterized in that: this blowing agent foams and the curing of this liquid state sclerosis glue is carried out synchronously.
28, the manufacture method of porousness drier as claimed in claim 24 is characterized in that: this blowing agent is foaming in advance, then should just solidify by liquid state sclerosis glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021536813A CN100334718C (en) | 2002-12-03 | 2002-12-03 | Packaging structure of organic electroluminescent cell and making process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021536813A CN100334718C (en) | 2002-12-03 | 2002-12-03 | Packaging structure of organic electroluminescent cell and making process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1505442A true CN1505442A (en) | 2004-06-16 |
| CN100334718C CN100334718C (en) | 2007-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021536813A Expired - Fee Related CN100334718C (en) | 2002-12-03 | 2002-12-03 | Packaging structure of organic electroluminescent cell and making process thereof |
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| Country | Link |
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| CN (1) | CN100334718C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102264206A (en) * | 2011-06-30 | 2011-11-30 | 山东亿玛信诺电气有限公司 | Automatic sealing device for electrical cabinet |
| CN102361064A (en) * | 2011-10-26 | 2012-02-22 | 四川虹视显示技术有限公司 | Method for packaging organic light-emitting diode (OLED) substrate |
| CN104425548A (en) * | 2013-09-05 | 2015-03-18 | 元太科技工业股份有限公司 | Organic light emitting display |
| CN106384788A (en) * | 2016-10-21 | 2017-02-08 | 纳晶科技股份有限公司 | Electroluminescent device and liquid desiccant for electroluminescence device |
| CN107464888A (en) * | 2017-08-01 | 2017-12-12 | 京东方科技集团股份有限公司 | A kind of encapsulating structure and preparation method thereof and display device |
| CN109037085A (en) * | 2018-08-01 | 2018-12-18 | 苏州福莱威封装技术有限公司 | Packaging method and encapsulating structure |
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| CN110364640A (en) * | 2019-07-16 | 2019-10-22 | 江苏集萃有机光电技术研究所有限公司 | A kind of encapsulating structure, encapsulation ink and its application |
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Family Cites Families (1)
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| EP1208726A1 (en) * | 1999-09-03 | 2002-05-29 | Uniax Corporation | Encapsulation of organic electronic devices |
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| CN102264206A (en) * | 2011-06-30 | 2011-11-30 | 山东亿玛信诺电气有限公司 | Automatic sealing device for electrical cabinet |
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| CN104425548A (en) * | 2013-09-05 | 2015-03-18 | 元太科技工业股份有限公司 | Organic light emitting display |
| CN106384788A (en) * | 2016-10-21 | 2017-02-08 | 纳晶科技股份有限公司 | Electroluminescent device and liquid desiccant for electroluminescence device |
| WO2019001151A1 (en) * | 2017-06-26 | 2019-01-03 | 京东方科技集团股份有限公司 | Packaging cover plate, organic light-emitting diode display and manufacturing method therefor |
| US11245099B2 (en) | 2017-06-26 | 2022-02-08 | Boe Technology Group Co., Ltd. | Packaging cover plate, organic light-emitting diode display and manufacturing method therefor |
| CN107464888A (en) * | 2017-08-01 | 2017-12-12 | 京东方科技集团股份有限公司 | A kind of encapsulating structure and preparation method thereof and display device |
| US10797267B2 (en) | 2017-08-01 | 2020-10-06 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Package structure, manufacturing method for the same, and display device |
| CN109037085A (en) * | 2018-08-01 | 2018-12-18 | 苏州福莱威封装技术有限公司 | Packaging method and encapsulating structure |
| CN110364640A (en) * | 2019-07-16 | 2019-10-22 | 江苏集萃有机光电技术研究所有限公司 | A kind of encapsulating structure, encapsulation ink and its application |
| CN110364640B (en) * | 2019-07-16 | 2021-09-28 | 江苏集萃有机光电技术研究所有限公司 | Packaging structure, packaging ink and application thereof |
| CN110635065A (en) * | 2019-09-26 | 2019-12-31 | 京东方科技集团股份有限公司 | Flexible display device, preparation method thereof and display device |
| CN110635065B (en) * | 2019-09-26 | 2022-08-12 | 京东方科技集团股份有限公司 | Flexible display device, preparation method thereof and display device |
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| CN100334718C (en) | 2007-08-29 |
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