CN102540613A - Method and apparatus for manufacturing electrophoretic display device - Google Patents
Method and apparatus for manufacturing electrophoretic display device Download PDFInfo
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- CN102540613A CN102540613A CN2010106105865A CN201010610586A CN102540613A CN 102540613 A CN102540613 A CN 102540613A CN 2010106105865 A CN2010106105865 A CN 2010106105865A CN 201010610586 A CN201010610586 A CN 201010610586A CN 102540613 A CN102540613 A CN 102540613A
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- electrophoretic display
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Abstract
The invention provides a method and apparatus for manufacturing an electrophoretic display device, relating to the technical field of electrophoretic display. The invention has the purposes of easily filling an electrophoretic liquid into a micro cup array of the electrophoretic display device and improving the production efficiency of the electrophoretic display device. The method for manufacturing the electrophoretic display device comprises the following steps of: forming the micro cup array on a first electrode layer of the electrophoretic display device by using the cup manufacturing technology; and filling the electrophoretic liquid with certain pressure into the micro cup array in vacuum state. The apparatus for manufacturing the electrophoretic display device comprises a cup manufacturing device, a vacuum device and an electrophoretic liquid filling device, wherein the cup manufacturing device is used for forming the micro cup array on the first electrode layer of the electrophoretic display device by using the cup manufacturing technology; the vacuum device is used for providing a vacuum environment so that the micro cup array stays in vacuum state; and the electrophoretic liquid filling device is used for filling the electrophoretic liquid with certain pressure into the micro cup array in vacuum state. The method and the apparatus provided by the invention are used for manufacturing the electrophoretic display device.
Description
Technical field
The present invention relates to the electrophoretic display technology field, relate in particular to a kind of manufacturing approach and manufacturing equipment of electrophoretic display device, EDD.
Background technology
Electrophoresis showed is a kind of novel display technique, and it possesses paper and electronic device characteristics simultaneously, has both met people's visual custom, and is convenient, fast again.The e-inks technology of one of gordian technique of electrophoresis showed; Be charged electrophoresis particle to be suspended in the dispersion medium solvent form suspension system; Under effect of electric field; Electrophoresis particle can move towards different directions by induced charge, and constantly changes pattern and the literal that is shown according to people's setting.
Miniature cup type electrophoretic display device (EPD); Its principle is charged electrophoresis particle to be dispersed in constitute colloid electrophoresis liquid in the dispersion medium solvent; It is encapsulated in the special miniature cup, this dispersed system is applied electric field, electrophoresis takes place in charged electrophoresis particle under the effect of Coulomb force.Through changing direction of an electric field, make the directed swimming of charged electrophoresis particle of a certain color, and see through transparent electrode plate and show that its structure is as shown in Figure 1.
Be a kind of typical miniature cup type electrophoretic display device (EPD) 10 shown in Fig. 1, this miniature cup type electrophoretic display device (EPD) 10 is separated into a plurality of miniature cup 10a through wall 10b, and is clipped between first electrode layer 11 and the second electrode lay 12.Miniature cup 10a fills with electrophoresis liquid, and this electrophoresis liquid comprises the electrophoresis particle 10c that is scattered among the dispersion medium solvent 10d.This seals with encapsulated layer 13 through the miniature cup 10a that fills, and with the second electrode lay 12, carry out lamination with frame sealant layer 14.
At present, miniature cup be packaged with single stage method and two-step approach is gone into the fluid-tight packing technique for two kinds.It is earlier the encapsulated layer material to be scattered in the electrophoresis liquid in advance that single stage method is gone into the fluid-tight packing technique, and layering is floating to the surface rapidly to treat electrophoresis liquid to fill the back, and final curing becomes encapsulated layer.It is earlier electrophoresis liquid to be injected miniature cup that two-step approach is gone into the fluid-tight packing technique, the encapsulated layer material is coated on the electrophoresis liquid again, and the encapsulated layer material is through solidifying to form encapsulated layer then.
In the process of in miniature cup, filling electrophoresis liquid, owing to the capillary reason of electrophoresis liquid, cause being difficult in miniature cup, fill, thereby reduced the production efficiency of electrophoretic display device, EDD.
Summary of the invention
The manufacturing approach of electrophoretic display device, EDD provided by the invention, manufacturing equipment and electrophoresis liquid filling device can easily be filled electrophoresis liquid in the miniature cup array, improved the production efficiency of electrophoretic display device, EDD.
For achieving the above object, the present invention adopts following technical scheme:
The present invention provides a kind of manufacturing approach of electrophoretic display device, EDD, comprising:
Adopt system cup technology on first electrode layer of electrophoretic display device, EDD, to form the miniature cup array;
In the said miniature cup array that is in vacuum state, fill electrophoresis liquid with pressure.
The top of the wall of said miniature cup has the breach of prescribed depth.
The notch depth at the top of the wall of said miniature cup is less than the thickness of encapsulated layer.
The notch depth at the top of the wall of said miniature cup is 1～8 μ m.
After forming the miniature cup array on first electrode layer of employing system cup technology at electrophoretic display device, EDD, before filling had the electrophoresis liquid of pressure in the said miniature cup array that is in vacuum state, said method also comprised:
The second electrode lay and said first electrode layer that is formed with the miniature cup array are buckled into box, and leave liquid inlet.
The said electrophoresis liquid with pressure of in the said miniature cup array that is in vacuum state, filling comprises:
In the said miniature cup array that is in vacuum state, fill have pressure be dispersed with encapsulated layer material electrophoresis liquid.
The said encapsulated layer material electrophoresis liquid that is dispersed with pressure of in the said miniature cup array that is in vacuum state, filling comprises:
To be in the said liquid inlet sealing of the said miniature cup array that is buckled into box under the vacuum state;
The miniature cup array that is buckled into box of said sealing is immersed in the electrophoresis liquid that is dispersed with the encapsulated layer material that normal atmosphere depresses;
Open said liquid inlet, so that said electrophoresis liquid is filled into said miniature cup array.
The present invention also provides a kind of manufacturing equipment of electrophoretic display device, EDD, and said equipment comprises
The miniature cup manufacturing installation is used to adopt system cup technology on first electrode layer of electrophoretic display device, EDD, to form the miniature cup array;
Vacuum plant is used to provide vacuum environment, so that said miniature cup array is in vacuum state;
The electrophoresis liquid filling device is used for filling the electrophoresis liquid with pressure to the said miniature cup array that is in vacuum state.
The manufacturing approach of electrophoretic display device, EDD provided by the invention and manufacturing equipment adopt system cup technology after forming the miniature cup array on first electrode layer, in this miniature cup array that is in vacuum state, fill the electrophoresis liquid with pressure.Like this; Owing to have pressure reduction between electrophoresis liquid and the miniature cup array when filling; Thereby can prevent effectively that the bubble in the electrophoresis liquid filling process from sneaking into; And effectively solve the problem that is difficult to pour into owing to the excessive electrophoresis liquid that causes of electrophoresis liquid surface tension, and then improved the production efficiency during the electrophoresis showed.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the organigram of electrophoretic display device, EDD;
The schematic flow sheet of the manufacturing approach of the electrophoretic display device, EDD that Fig. 2 provides for the embodiment of the invention;
The schematic flow sheet of the manufacturing approach of the electrophoretic display device, EDD that Fig. 3 provides for another embodiment of the present invention;
The perspective view that Fig. 4 constructs for the miniature cup that the embodiment of the invention provides;
The schematic top plan view of first electrode layer behind the system cup that Fig. 5 provides for the embodiment of the invention;
The perspective view of the electrophoretic display device, EDD behind the one-tenth box that Fig. 6 provides for the embodiment of the invention;
The schematic block diagram of the manufacturing equipment of the electrophoretic display device, EDD that Fig. 7 provides for the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The manufacturing approach of the electrophoretic display device, EDD that the embodiment of the invention provides, as shown in Figure 2, comprising:
S201, employing system cup technology form the miniature cup array on first electrode layer of electrophoretic display device, EDD.
Concrete, existing system cup technology mainly contains photetching and scribes glass technology and at a high speed full-automatic press mold system cup technology.
It is to be coated with one deck radiation curing material on the substrate of conductive film again being coated with that photetching is scribed glass technology; See through photomask it is carried out the selectivity exposure, with the solvent of solubilized radiation curing material uncured radiation curing material is removed then and formed the miniature cup structure.Suitable radiation curing material comprises acrylic ester, methacrylate and epoxy compound base polymer.For making the miniature cup that makes show high color saturation and contrast and have excellent mechanical intensity, the length of single miniature cup (wide) can be 50～300 μ m, and the miniature cup degree of depth can be 10～50 μ m.In addition, also can in radiation curing material, add the color or the dyestuff of mass concentration 2%～10%, make miniature cup painted, thereby obtain the more display device of high-contrast.
At a high speed full-automatic system cup technology is to be coated with one deck thermosetting substance on the transparency carrier of conductive film again being coated with; Then on the vitrifacation phase transition temperature of thermosetting substance with a punch to its pressure molded cup of rolling, after modes such as cooling or illumination solidify.Suitable thermosetting substance comprises acrylic ester, methacrylate, vinyl ether and epoxy compound base polymer, and its vitrifacation phase transition temperature should be between-20～50 ℃.The thickness of miniature cup bottom should so that help the electric transmission between electrically-conductive backing plate and the electrophoresis liquid, improve the display performance of miniature cup below 1 μ m.
S202, in the miniature cup array that is in vacuum state, fill electrophoresis liquid with pressure.
Concrete, both can adopt single stage method also can adopt two-step approach in the miniature cup array that is in vacuum state, to fill electrophoresis liquid with pressure.
It is earlier the encapsulated layer material to be scattered in the electrophoresis liquid in advance that single stage method is gone into the fluid-tight packing technique, and layering is floating to the surface rapidly to treat electrophoresis liquid under vacuum, to fill the back, and final curing becomes encapsulating film.It is under vacuum environment, electrophoresis liquid to be injected miniature cup earlier that two-step approach is gone into the fluid-tight packing technique, the encapsulated layer material is coated on the electrophoresis liquid again, and the encapsulated layer material is through solidifying to form encapsulating film then.The encapsulated layer material chosen has following two principles: (1) encapsulated layer density of material is less than electrophoresis liquid density; (2) encapsulated layer material and electrophoresis liquid are immiscible.
Suitable encapsulating material comprises that (methyl) acrylic ester, cyanoacrylate, vinyl ether, epoxy compound, isocyanates, allyl alcohol etc. have the polymkeric substance of crosslinkable groups.Encapsulating material solidifies through means such as illumination, heating, interfacial polymerization or humidity variations, and for preventing the miniature cup leakage, suitable encapsulated layer thickness is at 1～8 μ m.
The manufacturing approach of the electrophoretic display device, EDD that the embodiment of the invention provides adopts system cup technology after forming the miniature cup array on first electrode layer, in this miniature cup array that is in vacuum state, fills the electrophoresis liquid with pressure.Like this; Owing to have pressure reduction between electrophoresis liquid and the miniature cup array when filling; Thereby can prevent effectively that the bubble in the electrophoresis liquid filling process from sneaking into; And effectively solve the problem that is difficult to pour into owing to the excessive electrophoresis liquid that causes of electrophoresis liquid surface tension, and then improved the production efficiency during the electrophoresis showed.
The manufacturing approach of the electrophoretic display device, EDD that another embodiment of the present invention provides, as shown in Figure 3, step comprises:
S301, employing system cup technology form the miniature cup array on first electrode layer of electrophoretic display device, EDD.
Identical with a last embodiment, system cup technology can adopt photetching to scribe glass technology and at a high speed full-automatic press mold system cup technology.
In the present embodiment, different with traditional miniature cup, the top of the wall of the miniature cup in the present embodiment has the breach of prescribed depth, and is as shown in Figure 4.Fig. 4 is the synoptic diagram of a miniature cup 40, the breach 402 that all has prescribed depth on the wall 401 between any two miniature cups 40, and this prescribed depth h can be the degree of depth less than encapsulated layer thickness, for example is 1～8 μ m.So; When miniature cup was filled electrophoresis liquid, electrophoresis liquid can flow to another miniature cup from a miniature cup through this breach 402, has guaranteed the even filling of electrophoresis liquid; Simultaneously owing to the thickness of these breach 402 degree of depth less than encapsulated layer; After encapsulated layer solidified, the electrophoresis particle between the miniature cup can not mix each other, can guarantee the display quality of electrophoretic display device, EDD.
S302, in preparation miniature cup array or afterwards forms frame fluid sealant part.
Fig. 5 is the schematic top plan view of first electrode layer behind the system cup.In Fig. 5, be formed with miniature cup 40 arrays and frame fluid sealant 14 on first electrode layer 11, have breach 402 on the wall between miniature cup 40 and the miniature cup 40, leave the required liquid inlet 50 of follow-up electrophoresis liquid filling step in addition.
S303, through the frame fluid sealant, the second electrode lay fastened with first electrode layer that is formed with the miniature cup array for preparing is sealed to box, and leave the liquid inlet that can fill electrophoresis liquid.
Present embodiment is earlier first electrode layer and the second electrode lay to be buckled into box, fills electrophoresis liquid to the miniature cup array again.As shown in Figure 6; After first electrode layer 11 is buckled into box with the second electrode lay 12 through frame fluid sealant 14; Because special tectonic---the breach 402 on the wall of present embodiment miniature cup 40; Thereby can after becoming box, carry out the filling of electrophoresis liquid, electrophoresis liquid can be through breach 402 each miniature cups of circulation.
S304, under vacuum environment, seal up the liquid inlet that this is buckled into the miniature cup array behind the box.
S305, the miniature cup array behind the box of being buckled into that is under the vacuum state that will seal immerse in the electrophoresis liquid that is dispersed with the encapsulated layer material that normal atmosphere depresses.
S306, open the liquid inlet that this is buckled into the miniature cup array behind the box, realize the filling of electrophoresis liquid.
Because first electrode layer has become box with the second electrode lay,, present embodiment use single stage method comparatively suitable so carrying out the electrophoresis liquid filling.That is, in the miniature cup array that is in vacuum state, fill have pressure be dispersed with encapsulated layer material electrophoresis liquid, help the encapsulated layer material like this and be evenly distributed in each miniature cup.At this, this encapsulated layer material can be for not containing the high dielectric polymer or the oligomer of solvent, and composition radiation-curable, thermmohardening.Like this, adopt no-solvent type encapsulated layer material, can avoid the volatilization process of solvent, not only simplified manufacture craft, also avoided residual polar solvent showing the influence of performance of handoffs.
In the electrophoresis liquid filling process; Because the miniature cup array that immerses behind the one-tenth box in the electrophoresis liquid is in vacuum state, its outside electrophoresis liquid is in the normal atmosphere pressure condition, has pressure reduction between the two; After liquid inlet is opened; Because atmospheric existence, electrophoresis liquid can comparatively successfully be filled in the miniature cup array, and can prevent effectively that the bubble in the electrophoresis liquid filling process from sneaking into; And effectively solve the problem that is difficult to pour into owing to the excessive electrophoresis liquid that causes of electrophoresis liquid surface tension, and then improved the production efficiency during the electrophoresis showed.
S307, treat that the encapsulated layer material in the electrophoresis liquid is floating to the surface, be cured, obtain encapsulated layer through processing such as overheated, radiation.
Because the notch depth on the miniature wall of cup is less than the thickness of encapsulated layer; So the encapsulated layer in the present embodiment can be linked to be whole piece on the miniature cup array; Not only block the mutual mixing of electrophoresis particle in the electrophoresis liquid, also can play the effect of bonding first electrode layer and the second electrode lay.
The manufacturing approach of the electrophoretic display device, EDD that the embodiment of the invention provides is carried out molding process earlier, is in to this and fills the electrophoresis liquid with pressure in the miniature cup array under the vacuum state.Like this; Not only simplified the manufacturing process of electrophoretic display device, EDD; Can also prevent effectively that the bubble in the electrophoresis liquid filling process from sneaking into, and effectively solve because the problem that the excessive electrophoresis liquid that causes of electrophoresis liquid surface tension is difficult to pour into, and then improve the production efficiency of electrophoretic display device, EDD.
Need to prove; The detailed process of filling the electrophoresis liquid with pressure in the miniature cup array in the present embodiment under being in vacuum state is a kind of giving an example; The embodiment of the invention is not limited to this; Other filling mode also can, as utilize conduit, valve etc. to electrophoresis liquid pressurization, it is pushed the modes such as miniature cup array under the vacuum state.
As shown in Figure 7, the manufacturing equipment 70 of the electrophoretic display device, EDD that the embodiment of the invention provides comprises:
Miniature cup manufacturing installation 701 is used to adopt system cup technology on first electrode layer of electrophoretic display device, EDD, to form the miniature cup array;
Electrophoresis liquid filling device 702 is used for filling the electrophoresis liquid with pressure to the miniature cup array that is in vacuum state.
The manufacturing equipment of the electrophoretic display device, EDD that the embodiment of the invention provides, miniature cup manufacturing installation are used to adopt system cup technology on first electrode layer of electrophoretic display device, EDD, to form the miniature cup array; Vacuum plant is used to provide vacuum environment, so that the miniature cup array is in vacuum state; The electrophoresis liquid filling device is used for filling the electrophoresis liquid with pressure to the miniature cup array that is in vacuum state.Like this; Owing to have pressure reduction between electrophoresis liquid and the miniature cup array when filling; Thereby can prevent effectively that the bubble in the electrophoresis liquid filling process from sneaking into; And effectively solve the problem that is difficult to pour into owing to the excessive electrophoresis liquid that causes of electrophoresis liquid surface tension, and then improved the production efficiency during the electrophoresis showed.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of said claim.
Claims (8)
1. the manufacturing approach of an electrophoretic display device, EDD is characterized in that, comprising:
Adopt system cup technology on first electrode layer of electrophoretic display device, EDD, to form the miniature cup array;
In the said miniature cup array that is in vacuum state, fill electrophoresis liquid with pressure.
2. method according to claim 1 is characterized in that, the top of the wall of said miniature cup has the breach of prescribed depth.
3. method according to claim 2 is characterized in that the notch depth at the top of the wall of said miniature cup is less than the thickness of encapsulated layer.
4. method according to claim 3 is characterized in that, the notch depth at the top of the wall of said miniature cup is 1～8 μ m.
5. according to the arbitrary described method of claim 2-4; It is characterized in that; After forming the miniature cup array on first electrode layer of employing system cup technology at electrophoretic display device, EDD, before filling had the electrophoresis liquid of pressure in the said miniature cup array that is in vacuum state, said method also comprised:
The second electrode lay and said first electrode layer that is formed with the miniature cup array are buckled into box, and leave liquid inlet.
6. method according to claim 5 is characterized in that, the said electrophoresis liquid with pressure of in the said miniature cup array that is in vacuum state, filling comprises:
In the said miniature cup array that is in vacuum state, fill have pressure be dispersed with encapsulated layer material electrophoresis liquid.
7. method according to claim 6 is characterized in that, the said encapsulated layer material electrophoresis liquid that is dispersed with pressure of in the said miniature cup array that is in vacuum state, filling comprises:
To be in the said liquid inlet sealing of the said miniature cup array that is buckled into box under the vacuum state;
The miniature cup array that is buckled into box of said sealing is immersed in the electrophoresis liquid that is dispersed with the encapsulated layer material that normal atmosphere depresses;
Open said liquid inlet, so that said electrophoresis liquid is filled into said miniature cup array.
8. the manufacturing equipment of an electrophoretic display device, EDD is characterized in that, said equipment comprises
The miniature cup manufacturing installation is used to adopt system cup technology on first electrode layer of electrophoretic display device, EDD, to form the miniature cup array;
Vacuum plant is used to provide vacuum environment, so that said miniature cup array is in vacuum state;
The electrophoresis liquid filling device is used for filling the electrophoresis liquid with pressure to the said miniature cup array that is in vacuum state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106105865A CN102540613A (en) | 2010-12-28 | 2010-12-28 | Method and apparatus for manufacturing electrophoretic display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106105865A CN102540613A (en) | 2010-12-28 | 2010-12-28 | Method and apparatus for manufacturing electrophoretic display device |
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| CN102540613A true CN102540613A (en) | 2012-07-04 |
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| CN2010106105865A Pending CN102540613A (en) | 2010-12-28 | 2010-12-28 | Method and apparatus for manufacturing electrophoretic display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014190629A1 (en) * | 2013-05-29 | 2014-12-04 | 北京京东方光电科技有限公司 | Electronic paper module and display apparatus and manufacturing method for said module |
| CN109946900A (en) * | 2019-04-26 | 2019-06-28 | 苏州汉朗光电有限公司 | Electric ink display module and its manufacturing method |
| JP2021510843A (en) * | 2018-04-20 | 2021-04-30 | エルジー・ケム・リミテッド | Variable transmittance film and smart window including it |
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Application publication date: 20120704 |