CN102062984A - Electrophoretic display device and manufacturing method thereof - Google Patents
Electrophoretic display device and manufacturing method thereof Download PDFInfo
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- CN102062984A CN102062984A CN2010105670035A CN201010567003A CN102062984A CN 102062984 A CN102062984 A CN 102062984A CN 2010105670035 A CN2010105670035 A CN 2010105670035A CN 201010567003 A CN201010567003 A CN 201010567003A CN 102062984 A CN102062984 A CN 102062984A
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Abstract
The invention discloses an electrophoretic display device, comprising a light transmission rigid panel provided with a transparent conducting layer, an electrophoretic display layer, a glue layer and a control electrode panel from top to bottom sequentially. The light transmission rigid panel can be a color filter; and the glue layer can be heat curable, radiation curable or chemical reaction curable adhesive. The invention also discloses a method for manufacturing the electrophoretic display device, comprising the following steps: a) coating the electrophoretic display layer at one side of the transparent conducting layer of the light transmission rigid panel; b) coating the glue layer on the electrophoretic display layer or coating the glue layer at one side of the conducting layer of the control electrode panel; c) gluing the light transmission rigid panel coated with the electrophoretic display layer and the control electrode panel by virtue of the glue layer; and d) curing the glue layer. In the invention, the electrophoretic display layer is directly coated on the light transmission rigid panel such as the color filter, thus better protecting the electrophoretic display layer and producing no optical parallax when a color electrophoretic display device is realized; and meanwhile, specific curable adhesive is utilized to achieve better gluing effect.
Description
Technical field
The present invention relates to the display device technology field, particularly a kind of electrophoretic display apparatus and manufacture method thereof.
Background technology
Electrophoretic display apparatus is the class master mode display display technique of development early, mainly be with the charged particle in the extra electric field driving aaerosol solution, utilize the change of particle location, show the optical states contrast of particle and solution, backboard or particle and particle, make image and show.And when electric field is removed, this display device will keep shown picture, thereby realize that stable state shows.
Electronic Paper is usually based on electrophoretic display apparatus, because it is very approaching with common paper, promptly have the performance such as high-comfort of height contrast, wide viewing angle degree, low energy consumption and reading, has been applied to a lot of fields gradually.
Electrophoretic display apparatus can show the pattern of black and white, and also has a plurality of middle gray between B﹠W, for example somber, dull gray, ash etc., thus show a complete picture by each pixel on the control display screen to corresponding gray scale.
Present electrophoretic display apparatus substantially all is a black and white, and color electric phoretic display device is a development in future trend.Color electric phoretic display device can reach colored purpose by increasing colored filter.Increasing a kind of method of colored filter, is exactly directly to increase one deck colored filter on the black and white electrophoretic display panel that existing market is promoted.Such method has some bad places, one is that present black and white electrophoretic display panel is that the electrophoresis showed layer is prepared on the PET (Polyethylene Terephthalate) that has ITO (Indium Tin Oxides), and pet layer is easy to be subjected to extraneous damage or chemical corrosion; Be easy to aging distortion, have influence on the serviceable life of electrophoretic display apparatus so greatly, and when setting up colored filter thereon, midfeather a PET who has ITO, so just reduced transmittance, display effect is had considerable influence.In addition, a more serious problem, the PET that has ITO that is exactly colored filter and electrophoresis showed interlayer can cause problem of parallax experienced, this problem of parallax experienced causes adverse influence for the picture quality of display device, particularly when the vertical direction of observing the surface with respect to display device is observed display device with wide-angle especially like this.
Colored filter in the market all is to adopt glass substrate basically, and the base plate of electrophoretic display apparatus generally is to adopt TFT (Thin Film Transistor) substrate, the TFT substrate also is the glass substrate structure, the colored filter of glass substrate is fitted in the TFT of another glass substrate, adopts and make the used method of electrophoretic display apparatus usually and can not finish.This is because currently used method is to be coated with the pressure-sensitive alite paste of last layer on the electrophoresis showed layer, after the alite paste drying, adopt the method for lamination again, colored filter and control electrode panel are fit together, because the alite paste surface of contact after the surface of contact of control electrode panel and the curing all is a solid, alite paste surface of contact after the curing is also can not produce minute surface to come out, space or bubble will appear behind the lamination of these two, finally can be embodied in has influenced the effect that powers up that the electrophoresis showed of space or bubble layer is arranged, and the various spots that occur occur not wanting, defectives such as striped.
In addition, this display device can not be used the method for making of similar liquid crystal device.Make the method for LCD, be that colored filter and control electrode panel are made a glass case with adhesive material, and on this box, stay next aperture that liquid crystal material pours into into by aperture.And when the electrophoresis showed layer of electrophoretic display apparatus was solid, the method for making of this similar LCD just had been not suitable for.
Summary of the invention
Technical matters to be solved by this invention provides a kind of electrophoretic display apparatus, it has solved the above-mentioned technical matters of mentioning, promptly prolong the serviceable life of electrophoretic display apparatus, make the picture quality of display device can not be subjected to too big influence, also solved the variety of issue that causes in the applying process.
In order to address the above problem, the invention provides a kind of electrophoretic display apparatus, it comprises from top to bottom successively: printing opacity rigid panel, electrophoresis showed layer, glue layer and the control electrode panel of band transparency conducting layer.
Above-mentioned rigid panel comprises substrate and transparency conducting layer, wherein substrate includes but not limited to adopt transparent rigid material, as glass, organic glass (PMMA), wherein the material of transparency conducting layer can be selected from indium tin metal oxide (ITO), zinc paste (ZnO), tin ash (SnO
2) or indium oxide (In
2O
3), carbon (C), gold (Au), silver (Ag), copper (Cu), aluminium (Al) etc., preferably ITO.
Further, above-mentioned rigid panel can be colored filter (Color Filter), and it comprises glass substrate, chromatic photoresist (Color Resist) layer, ITO conductive layer.The array that the colorama resistance layer is made up of different pigment, for example the colorama resistance layer is to adopt the array of RGB (promptly red, green, blueness) to form.Sometimes in order to increase the brightness of demonstration, in some part employing transparent processing of photoresist layer, promptly do not finish pigment, such colorama resistance layer is the array that contains different pigment and transparent part, for example RGBT (i.e. redness, green, blueness and transparent part).Manufacturing method of color filters has a lot, includes but not limited to dye method, strike, print process, pigment dispersing method, the color glue method of non-photoetching type, ink-jet method.The colorama resistance layer is by these method for makings photoresist to be produced on the base material, and photoresist is made up of monomers such as pigment, spreading agent, adjuvant, joint resins substantially.
Described printing opacity rigid panel also can be the ito glass panel, and it comprises transparent glass substrate and ITO conductive layer.
Described glue layer material is thermohardening type or radiation-curable or chemical reaction curing type bonding agent.Its material be selected from epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic and polyacrylate heat curable adhesive, and above material in two or more compound substance.Possess flowability under the normal temperature state before solidify at described glue layer material end, its viscosity is 10cp～5000cp; It does not contain water component.The body resistivity of described glue layer is 10
5～10
14Ohmcm is preferably 10
7～10
12Ohmcm.Selected heat curable adhesive solidification temperature is-30 ℃～250 ℃, is preferably 25 ℃～130 ℃.
Further, described glue layer material can be selected the polyurethanes thermal curable adhesives of single component or bi-component for use, or the epoxy resin thermal curable adhesives of single component or bi-component.
Described glue layer material, also the adhesive material that need not solidify can be selected for use, bonding agent, and or the compound substance formed of above two or more material of epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate can be selected from.Described glue layer material possesses flowability, and its viscosity is 10cp～5000cp; It does not contain water component.The body resistivity of described glue layer is 10
5～10
14Ohmcm is preferably 10
7～10
12Hmcm.
The electrophoresis showed layer is based on the display material layer that principle of electrophoresis is made.The bonding agent that contains microcapsules in the electrophoresis showed layer and microcapsules are bonded together includes suspending liquid, is suspended in a plurality of charged particles in the suspending liquid, or also contains a plurality of uncharged particles that are suspended in the suspending liquid in the described microcapsules.By applying electric field to suspending liquid, thereby charged particle can move in capsule and shows different pictures.Above-mentioned bonding agent is the potpourri of polymer adhesive and adjuvant, and this adjuvant is selected from but is not limited to conductive metal powder, ferrofluid, non-reactive solvent, conductive organic compound or their bond.Polymer adhesive is including but not limited to two or more the compound substance in polyurethane, ethylene-vinyl acetate copolymer class, epoxy resin or polyacrylic acid and polyacrylate and the above material.
Above-mentioned control electrode panel comprises substrate and conductive layer, and wherein conductive can be selected from but be not limited to indium tin metal oxide (ITO), zinc paste (ZnO), tin ash (SnO
2) or indium oxide (In
2O
3), carbon (C), gold (Au), silver (Ag), copper (Cu), aluminium (Al), thin film transistor (TFT) (Thin FilmTransistor), OTFT (Organic Thin Film Transistor) or the like; And baseplate material is selected from but be not limited to PET, nylon, polystyrene, tygon, polymethylmethacrylate or Polyvinylchloride, epoxy resin, FR-4, glass etc.Control electrode panel preferred glass substrate tft array and flexible base, board OTFT array.
As the another kind of embodiment of electrophoretic display apparatus of the present invention, around described glue layer and electrophoresis showed layer, edge sealing adhesive can also be set.The material of edge sealing adhesive be selected from but be not limited to epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate, and above material in two or more compound substance, or the thermohardening type of analog or radiation-curable or chemical reaction curing type bonding agent.
Further; between described electrophoresis showed layer and the glue layer protective seam can also be set, the material of this protective seam be selected from but be not limited to epoxy resin, polyacrylic acid and polyacrylate, polyurethanes, ethylene-vinyl acetate copolymer class, polyvinyl acetate class bonding agent, and above material in two or more compound substance.
The present invention also provides a kind of manufacture method of electrophoretic display apparatus, and it may further comprise the steps:
A) coat the electrophoresis showed layer in transparency conducting layer one side of printing opacity rigid panel;
B) above described electrophoresis showed layer, the apply glue material of layer, or at the apply glue material of layer of conductive layer one side of control electrode panel;
C) before the material of described glue layer is uncured, the printing opacity rigid panel and the control electrode panel that are coated with the electrophoresis showed layer are fitted by the material of glue layer;
D) with the material cured of described glue layer.
Further, above-mentioned printing opacity rigid panel can be that colored filter also can be the ito glass panel; At step a) and b) between also comprise step: above described electrophoresis showed layer, adopt the method for coating to coat layer protective layer; After protective seam solidifies, administration step b) above described protective seam, adopt the method for coating to be coated with the material of last layer glue layer, or be coated with the material of last layer glue layer in conductive layer one survey of control electrode panel.
In the manufacture method of above-mentioned electrophoretic display apparatus, the glue layer material of mentioning is thermohardening type or radiation-curable or chemical reaction curing type bonding agent.Its material be selected from but be not limited to epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate heat curable adhesive, and above-mentioned material in two kinds and two or more compound substances.Possess flowability under the normal temperature state before solidify at described glue layer material end, its viscosity is 10cp～5000cp; It is aqueous components not.The body resistivity of described glue layer is 10
5～10
14Ohmcm is preferably 10
7～10
12Ohmcm.The solidification temperature of selected heat curable adhesive is-30 ℃～250 ℃, is preferably 25 ℃～130 ℃.Select corresponding curing according to selected glue layer properties of materials, for example be heating and curing, radiation curing, chemical reaction solidify.
In the manufacture method of above-mentioned electrophoretic display apparatus, the coating process of the electrophoresis showed layer of mentioning, glue layer material, protective seam, its coating method is mainly including but not limited to sheet mould coating, slit or extrusion coating, slip or stacked coating, curtain coating, roller coat, as the knife-over-roll roller coat, dip coated, spraying; Spin coating; Brush; Silk-screen printing technique, ink-jet printing process, hot stamping brush, xeroprinting or other similar techniques.
In the manufacture method of above-mentioned electrophoretic display apparatus, c) applying method of mentioning in, can adopt method and other similar method of manual assembly, mould applying, machine lamination, vacuum lamination, and the air between the applying panel be discharged by the mode of extruding or vacuum suction.
Above-mentioned steps d) can adopt the another kind of embodiment of replacing: utilize edge sealing adhesive around glue layer and electrophoresis showed layer, to carry out edge sealing, solidify described edge sealing adhesive.The material of edge sealing adhesive be selected from but be not limited to epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate heat-curing type adhesive, and above material in two or more compound substance or thermohardening type or the radiation-curable or the chemical reaction curing type bonding agent of analog.According to the characteristic of selected edge sealing adhesive, and adopt the curing mode corresponding that edge sealing adhesive is solidified, for example be heating and curing, radiation curing or chemical reaction curing with it.In this embodiment, described glue layer material, what select for use is the material that need not solidify, and can be selected from but is not limited to bonding agent, and or the compound substance formed of above two or more material of epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate.Possess flowability under this glue layer material normal temperature state, its viscosity is 10cp～5000cp; It does not contain water component.The body resistivity of described glue layer is 10
5～10
14Ohmcm is preferably 10
7～10
12Hmcm.Further, at step a) and b) between also comprise step: above described electrophoresis showed layer, adopt the method for coating to coat layer protective layer; After protective seam solidifies, administration step b) above described protective seam, adopt the method for coating to be coated with the material of last layer glue layer, or be coated with the material of last layer glue layer in conductive layer one survey of control electrode panel.
Compared with prior art, use the present invention,, when realizing color electric phoretic display device, problem of parallax experienced can not occur because electrophoretic display apparatus of the present invention directly is coated with the electrophoresis showed layer on the printing opacity rigid panel of colored filter and so on.In the present invention, be coated with last layer glue layer material earlier, before uncured, fit, mobile glue layer material can be filled the space part well, also can be by extruding or the mode that vacuumizes, well air is discharged from the glue layer material that flows, so just make that the effect of rigid panel and control panel applying is better, overcome defect problems such as the spot that occurs in the existing applying method, striped.
Description of drawings
Fig. 1 a is a kind of electrophoretic display apparatus of the present invention schematic cross-section in one embodiment;
Fig. 1 b is a kind of electrophoretic display apparatus of the present invention schematic cross-section in another embodiment;
Fig. 2 a is a kind of electrophoretic display apparatus of the present invention schematic cross-section in another embodiment;
Fig. 2 b is a kind of electrophoretic display apparatus of the present invention schematic cross-section in another embodiment;
Fig. 3 is the schematic cross-section of colored filter of the present invention;
Fig. 4 is the display effect figure of the electrophoretic display apparatus of employing prior art applying;
Fig. 5 is the display effect figure of a kind of embodiment of electrophoretic display apparatus of the present invention;
Fig. 6 is the manufacture method process flow diagram in one embodiment of a kind of electrophoretic display apparatus of the present invention;
Fig. 7 is the manufacture method process flow diagram in another embodiment of a kind of electrophoretic display apparatus of the present invention;
Fig. 8 is a kind of electrophoretic display apparatus of the present invention perspective view in one embodiment.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
At first, the present invention has done some and has improved on the basis of existing black and white electrophoretic display apparatus, and the present invention adopts the printing opacity rigid panel to replace original PET film, and this printing opacity rigid panel can be transparent glass, also can be transparent organic glass; So just make that the screen of electrophoretic display apparatus is more durable, and with respect to PET, the external force resistance ability is stronger, more can protects the material of electrophoresis showed layer.But also further solved applying problem between printing opacity rigid panel and the rigid plate.
The present invention also provides a kind of color electric phoretic display device and manufacture method thereof.The present invention adopts the colored filter based on glass substrate of main flow in the market, and it is convenient to implement.The present invention directly is coated on the electrophoresis showed layer on the colored filter, on the electrophoresis showed layer, coat the glue layer material of fluid again, or on the control electrode panel, coat the glue layer material of fluid, before the glue layer material is uncured, a side that colored filter is scribbled the electrophoresis showed layer is fitted by glue layer material and control electrode panel, after treating the glue layer material cured, finally form color electric phoretic display device of the present invention.Coating the glue layer material of fluid fits again, the benefit of doing like this be the glue layer material of fluid can the complete filling colored filter and the control electrode panel between institute gapped, also easily the bubble between colored filter and the control electrode panel is extruded from the glue layer material that flows, overcome the solid alite paste of the common employing of present institute and problems such as the gap that produces and bubble.
According to shown in Figure 3, at present, the structure of colored filter includes following at least three stock layers usually: glass substrate 11, colorama resistance layer 12, transparency conducting layer 13 (ITO layer).The array that the colorama resistance layer is made up of different pigment, for example the colorama resistance layer is to adopt the array of RGB (promptly red, green, blueness) to form.Sometimes in order to increase the brightness of demonstration, in some part employing transparent processing of photoresist layer, promptly do not finish pigment, such colorama resistance layer is the array that contains different pigment and transparent part, for example RGBT (i.e. redness, green, blueness and transparent part).Manufacturing method of color filters has a lot, and it includes but not limited to dye method, strike, print process, pigment dispersing method, the color glue method of non-photoetching type, ink-jet method.The colorama resistance layer is by these method for makings photoresist to be produced on the base material, and photoresist is monomers such as pigment, spreading agent, adjuvant, joint resin substantially.The colored filter of the above-mentioned this market mainstream can directly be bought acquisition from producer, utilize the product of ready-made volume production can save a lot of production costs and cost of development, utilize this colored filter to make the manufacturing process of color electric phoretic display device of the present invention become simpler.
The control electrode panel comprises base material and conductive layer, and wherein conductive can be selected from but be not limited to: indium tin metal oxide (ITO), zinc paste (ZnO), tin ash (SnO
2), indium oxide (In
2O
3), carbon (C), gold (Au), silver (Ag), copper (Cu), aluminium (Al), thin film transistor (TFT) (Thin FilmTransistor), OTFT (Organic Thin Film Transistor) or the like; And substrate material is selected from but be not limited to: PET, nylon, polystyrene, tygon, polymethylmethacrylate or Polyvinylchloride, epoxy resin, FR-4, glass etc.Control electrode panel preferred glass substrate tft array and flexible base, board OTFT array.
A kind of electrophoretic display apparatus of the present invention, its structure comprises from top to bottom successively: the printing opacity rigid panel 10, electrophoresis showed layer 20, glue layer 30 and the control electrode panel 40 that have transparency conducting layer, this printing opacity rigid panel can be a colored filter, also can be the ito glass panel, wherein the ito glass panel comprises glass substrate and ITO transparency conducting layer; As shown in Figure 1a;
As a kind of preferred implementation of the present invention, between above-mentioned electrophoresis showed layer 20 and the glue layer 30 protective seam 50 can also be set, shown in Fig. 1 b.After coated electrophoresis showed layer 20 drying, determine whether increasing above-mentioned protective seam according to the structural design needs of electrophoretic display apparatus.The material of protective seam be selected from but be not limited to epoxy resin, polyacrylic acid and polyacrylate, polyurethanes, ethylene-vinyl acetate copolymer class, polyvinyl acetate class bonding agent, and above-mentioned material in two kinds and the compound substance of two or more compositions.The same mode that adopts coating is coated protective seam on the electrophoresis showed layer.After the layer drying to be protected, on protective seam or control electrode panel, be coated with the glue layer of fluid again.
Above-mentioned glue layer can be thermohardening type or radiation-curable or chemical reaction curing type bonding agent.Its material be selected from but be not limited to epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate heat curable adhesive, and above-mentioned material in two or more compound substance.The material of this glue layer must possess under the normal temperature before uncured good flowability (viscosity 10cp～5000cp), do not comprise water component, heat or the condition of optical radiation under, glue layer can solidify.The scope of the body resistivity of the glue layer after the curing is 10
5To 10
14The ohmcm interval is preferably 10
7To 10
12The hmcm interval; Certainly this numerical range might not be limited within the above-mentioned scope.This glue layer is preferably transparent.
As a kind of preferred forms of the present invention, the material of above-mentioned glue layer is preferably the polyurethanes heat curable adhesive of single component or two components, perhaps is the epoxy resin heat curable adhesive of single component or bi-component.The solidification temperature of heat curable adhesive can be-30 ℃～250 ℃, but is preferably 25 ℃～130 ℃.Have sealing, high-low temperature resistant, damp proof, dampproof effect after such glue layer material cured.
The bonding agent that the electrophoresis showed layer contains microcapsules and microcapsules are bonded together.Include suspending liquid in the microcapsules, be suspended in a plurality of charged particles in the suspending liquid, can also contain other the uncharged particle that is suspended in the suspending liquid.By applying electric field to suspending liquid, thereby charged particle can move in capsule and shows different pictures.Above-mentioned bonding agent is the potpourri of polymer adhesive and adjuvant, and this adjuvant is selected from but is not limited to: conductive metal powder, ferrofluid, non-reactive solvent, conductive organic compound or their bond.Polymer adhesive is including but not limited to polyurethane, ethylene-vinyl acetate copolymer class, epoxy resin or polyacrylic acid and polyacrylate etc.
With reference to figure 2a and 2b, when the material of the above-mentioned glue layer of mentioning keeps fluid state always, in the time of promptly can not solidifying, around the glue layer of above two kinds of color electric phoretic display devices, can set up edge sealing adhesive 70 and carry out edge sealing, solidify edge sealing adhesive again, can prevent that like this glue layer of fluid from overflowing.The material of this edge sealing adhesive can be selected from but be not limited to epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate, and above material in two or more compound substance or similarly thermohardening type or radiation-curable or chemical reaction curing type bonding agent.Solidifying edge sealing adhesive can select corresponding curing mode according to the characteristic of edge sealing adhesive, solidifies as radiation curing, heat curing, chemical reaction.
With reference to figure 6, the manufacture method of a kind of electrophoretic display apparatus provided by the invention, it may further comprise the steps:
S01, adopt the method for coating to coat the electrophoresis showed layer in transparency conducting layer one side of printing opacity rigid panel, this printing opacity rigid panel can be a colored filter, also can be the ito glass panel;
S02, treat that above-mentioned electrophoresis showed layer solidifies after, above described electrophoresis showed layer, adopt the method for the coating material of layer that applies glue, or survey the material of the layer that applies glue at the conductive layer one of control electrode panel;
S03, before the material of glue layer is uncured, will be coated with the printing opacity rigid panel and the control electrode panel of electrophoresis showed layer fit by the material of glue layer;
S04, with the material cured of described glue layer.
Further, among the above-mentioned steps S02, after the electrophoresis showed layer solidifies, can be coated with layer protective layer earlier above it, after the layer drying to be protected, on protective seam, adopt the method for coating to be coated with last layer glue layer material again.The material of protective seam be selected from but be not limited to epoxy resin, polyacrylic acid and polyacrylate, polyurethanes, ethylene-vinyl acetate copolymer class, polyvinyl acetate class bonding agent, and above-mentioned material in two kinds and the compound substance of two or more compositions.
As for the method for the above-mentioned coating of mentioning, its coating method is mainly including but not limited to sheet mould coating, slit or extrusion coating, slip or stacked coating, curtain coating, roller coat, and as the knife-over-roll roller coat, dip coated, spraying; Spin coating; Brush; Silk-screen printing technique, ink-jet printing process, hot stamping brush, xeroprinting or other similar techniques.
As for the applying method among the above-mentioned steps S03, can adopt but be not limited to following method: method and other similar method of manual assembly, mould applying, machine lamination, vacuum lamination, and by the mode of extruding or vacuum suction the air between the applying panel is discharged.
The curing of glue layer among the step S04 should be selected the method for solidifying according to selected properties of materials, for example can adopt be heating and curing, mode such as radiation curing finishes.
When selecting the glue layer material that can not solidify for use, above-mentioned steps S04 can replace with S040: utilize edge sealing adhesive to carry out edge sealing around glue layer and electrophoresis showed layer, solidify described edge sealing adhesive, referring to Fig. 7.Further, at step a) and b) between also comprise step: above described electrophoresis showed layer, adopt the method for coating to coat layer protective layer; After protective seam solidifies, administration step b) above described protective seam, adopt the method for coating to be coated with the material of last layer glue layer, or be coated with the material of last layer glue layer in conductive layer one survey of control electrode panel.
Because the glue layer material of liquid flowability can be realized two applyings between the different panels well; the also glue material that can select for use some need not solidify, and keep glue material not spill and protect the performance of glue and device not to be damaged by edge sealing adhesive.Design two kinds of different color electric phoretic display devices according to this thinking, be respectively: the electrophoretic display apparatus that is printing opacity rigid panel 10, electrophoresis showed layer 20, glue layer 60 and control electrode panel 40 from top to bottom; In addition, also can be provided with edge sealing adhesive 70, shown in Fig. 2 a with edge sealing around it; Another kind of structure comprises from top to bottom: printing opacity rigid panel 10, electrophoresis showed layer 20, protective seam 50, glue layer 60 and control electrode panel 40 in addition, also can be provided with the edge sealing adhesive 70 with edge sealing around it, shown in Fig. 2 b.Above-mentioned printing opacity rigid panel can be that colored filter also can be the ito glass panel.
And realize that the method for making of these two kinds of display device also can increase the processing procedure of some edge sealing adhesives.
Embodiment described below is concrete illustrating, and therefore protection scope of the present invention is not subjected to any qualification.
Embodiment 1
To adopt the ito glass panel is example, and this electrophoretic display apparatus structure from top to bottom is ito glass panel, electrophoresis showed layer, protective seam, glue layer and ito glass panel, below the implementation method of explanation a kind of electrophoretic display apparatus making step of the present invention.
With the ITO layer of ito glass panel up, be placed on the coating platform,, the electrophoresis showed layer coated on the ITO layer with the mode of blade coating.Carry out dried after the coating, can be earlier air dry 2 hours at ambient temperature, again with 70 ℃ of bakings of baking oven 10min.With the material of the protective seam for preparing, also the mode by blade coating is coated on the above-mentioned dry rear electrophoresis display layer, and air dry 2 hours is at ambient temperature toasted 10min with 70 ℃ in baking oven again and carried out dried earlier.
With the thermosetting material of glue layer, the mode by blade coating is coated on the above-mentioned dried protective seam.Then, ITO layer one side of glue layer one side and another ito glass panel fitted.And carry out roll-in with roll squeezer, discharge the air in the glue layer.Goods after fitting are put into baking box, and the solidification temperature that is adjusted to glue layer is cured, and obtains a kind of electrophoretic display apparatus of the present invention.
Embodiment 2
To adopt the ito glass panel is example, and a kind of current methods of making electrophoretic display apparatus at present be described, compares with the method for embodiment 1 being used for.
This electrophoretic display apparatus structure from top to bottom that current methods is made is ito glass panel, electrophoresis showed layer, adhesive joint between solid layer and ito glass panel, and wherein, the material of adhesive joint between solid layer is normally used to be pressure adhesive.At present usually the method that adopts is: with the ITO layer of ito glass panel up, be placed on the coating platform, with the mode of blade coating, the electrophoresis showed layer coated on the ITO layer.Carry out dried after the coating, can be earlier air dry 2 hours at ambient temperature, again with 70 ℃ of bakings of baking oven 10min.On the electrophoresis showed layer, be coated with the pressure-sensitive alite paste of last layer, treat that pressure-sensitive alite paste solidifies direct afterwards and another ito glass carries out lamination joint.
Fig. 4 is that to adopt existing method be the display effect figure of the electrophoretic display apparatus made of embodiment 2 described methods.And Fig. 5 is that employing method of the present invention is the electrophoretic display apparatus that embodiment 1 described method is made, and can contrast and find out, the display effect of Fig. 5 obviously is better than existing employed method.
Embodiment 3
With reference to a kind of embodiment shown in Figure 8, colored filter is made up of for 413 3 layers glass substrate 411, photoresist layer 412 and ITO layer, the colorama resistance layer is by R (red, redness), G (green, green), B (blue, blue) and the array composition of T (transparent, transparent, do not contain photoresist).Wherein one group of R, G, B and T form a pixel, and as shown in Figure 6,4 R, 4 G, 4 B and 4 T have formed four pixels.And also have the mark that is used for contraposition, two " ten " words on the colored filter.With the ITO layer of colored filter up, be placed on the coating platform,, the potpourri 420 of electrophoresis showed layer coated on the ITO of colored filter with the mode of blade coating.After the coating, carry out dried, can be earlier air dry 2 hours at ambient temperature, again with 70 ℃ of bakings of baking oven 10min.
With the material of the protective seam 430 for preparing, also the mode by blade coating is coated on the above-mentioned dry rear electrophoresis display layer 420, and air dry is 2 hours under the room temperature condition, carries out dried with 70 ℃ of bakings of baking oven 10min again.
With the thermosetting material of glue layer 440, the mode by blade coating is coated on the above-mentioned dried protective seam 430.Then, with conductive layer one side of glue layer 440 1 sides, fit towards control electrode panel (TFT base plate) 450.And carry out roll-in with roll squeezer, discharge the air in the glue layer 440.The TFT base plate is a control electrode panel, and mainly by substrate 452 and conductive layer 451, wherein conductive layer is made up of TFT one by one, is respectively that the array of r, g, b and t is formed, respectively R, G, B and the T of corresponding colored filter.When colored filter and TFT base plate are fitted, need to align with " ten " word alignment mark on the TFT base plate by " ten " word alignment mark on the colored filter.Then, the goods after this applying are put into baking box, the solidification temperature that is adjusted to glue layer is cured; Finally make color electric phoretic display device of the present invention.
In sum; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily 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 claim.
Claims (20)
1. an electrophoretic display apparatus is characterized in that, comprises successively from top to bottom: printing opacity rigid panel, electrophoresis showed layer, glue layer and the control electrode panel of band transparency conducting layer.
2. the manufacture method of an electrophoretic display apparatus, described electrophoretic display apparatus comprises from top to bottom successively: the printing opacity rigid panel, electrophoresis showed layer, glue layer and the control electrode panel that have transparency conducting layer; Described manufacture method may further comprise the steps:
A) coat the electrophoresis showed layer in transparency conducting layer one side of printing opacity rigid panel;
B) above described electrophoresis showed layer, the apply glue material of layer, or at the apply glue material of layer of conductive layer one side of control electrode panel;
C) before the material of described glue layer is uncured, the printing opacity rigid panel is scribbled a side of electrophoresis showed layer and conductive layer one side of control electrode panel is fitted by glue layer;
D) with the material cured of described glue layer.
3. electrophoretic display apparatus as claimed in claim 1 or 2 or manufacture method is characterized in that, described printing opacity rigid panel is a colored filter, and it comprises: glass substrate, colorama resistance layer and transparency conducting layer.
4. electrophoretic display apparatus as claimed in claim 1 or 2 or manufacture method is characterized in that, described printing opacity rigid panel is the ito glass panel, and it comprises transparent glass substrate and ITO conductive layer.
5. electrophoretic display apparatus as claimed in claim 1 or 2 or manufacture method is characterized in that, the body resistivity of described glue layer is 10
5～10
14Ohmcm.
6. electrophoretic display apparatus as claimed in claim 5 or manufacture method is characterized in that, the body resistivity of described glue layer is 10
7～10
12Ohmcm.
7. electrophoretic display apparatus as claimed in claim 1 or 2 or manufacture method, it is characterized in that, the material of described glue layer be selected from but be not limited to epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic and polyacrylate bonding agent, and above material in two or more compound substance.
8. electrophoretic display apparatus as claimed in claim 7 or manufacture method is characterized in that, possess flowability under the material normal temperature state of described glue layer, and its viscosity is 10cp～5000cp.
9. electrophoretic display apparatus as claimed in claim 7 or manufacture method is characterized in that the material of described glue layer is aqueous components not.
10. electrophoretic display apparatus as claimed in claim 1 or 2 or manufacture method is characterized in that, the material of described glue layer is thermohardening type or radiation-curable or chemical reaction curing type bonding agent.
11. electrophoretic display apparatus as claimed in claim 10 or manufacture method is characterized in that, described bonding agent is the polyurethanes thermal curable adhesives of single component or bi-component, perhaps is the epoxy resin thermal curable adhesives of single component or bi-component.
12. electrophoretic display apparatus as claimed in claim 10 or manufacture method is characterized in that, the solidification temperature of the bonding agent of described thermohardening type is-30 ℃～250 ℃.
13. electrophoretic display apparatus as claimed in claim 12 or manufacture method is characterized in that, the solidification temperature of the bonding agent of described thermohardening type is 25 ℃～130 ℃.
14. electrophoretic display apparatus as claimed in claim 1 or 2 or manufacture method, it is characterized in that, described electrophoresis showed layer contains microcapsules and bonding agent that microcapsules are bonded together, and the material of this bonding agent is selected from but is not limited to the bonding agent of polyurethanes, ethylene-vinyl acetate copolymer class, epoxy resin, polyacrylic acid and polyacrylate and two or more the compound substance in the above material. Include suspending liquid in the described microcapsules, be suspended in the charged particle in the suspending liquid or also contain the uncharged particle that is suspended in the suspending liquid.
15. electrophoretic display apparatus as claimed in claim 1 or 2 or manufacture method is characterized in that, described control electrode panel comprises base material and conductive layer; Described control electrode panel is glass substrate tft array or flexible base, board OTFT array.
16. electrophoretic display apparatus as claimed in claim 1; it is characterized in that; be provided with protective seam between described electrophoresis showed layer and the glue layer, the material of this protective seam be selected from but be not limited to epoxy resin, polyacrylic acid and polyacrylate, polyurethanes, ethylene-vinyl acetate copolymer class, polyvinyl acetate class bonding agent, and above material in two or more compound substance.
17. electrophoretic display apparatus as claimed in claim 1 is characterized in that, is provided with edge sealing adhesive around described glue layer and electrophoresis showed layer; The material of edge sealing adhesive be selected from but be not limited to epoxy resin, polyurethanes, silicone based bonding agent, polyacrylic acid and polyacrylate heat-curing type adhesive, and above material in two or more compound substance or thermohardening type or the radiation-curable or the chemical reaction curing type bonding agent of analog.。
18. the manufacture method of an electrophoretic display apparatus, described electrophoretic display apparatus is by comprising printing opacity rigid panel, electrophoresis showed layer, glue layer and the control electrode panel that has transparency conducting layer from top to bottom successively and being arranged on the electrophoresis showed layer and glue layer edge sealing adhesive on every side; It is characterized in that, may further comprise the steps:
A) coat the electrophoresis showed layer in transparency conducting layer one side of printing opacity rigid panel;
B) material of layer that above described electrophoresis showed layer, applies glue, or be coated with the material of last layer glue layer in conductive layer one side of control electrode panel;
C) the printing opacity rigid panel being scribbled a side of electrophoresis showed layer and conductive layer one side of control electrode panel fits by the material of glue layer;
D) utilize edge sealing adhesive around glue layer, to carry out edge sealing, solidify described edge sealing adhesive.
19., it is characterized in that, at step a) and b as claim 2 or 18 described manufacture methods) between also comprise step: above described electrophoresis showed layer, coat layer protective layer; After protective seam solidifies, administration step b) material of the layer that above described protective seam, applies glue, or at the apply glue material of layer of conductive layer one side of control electrode panel.
20. as claim 2 or 18 described manufacture methods, it is characterized in that, applying in the described step c) is adopted but is not limited to following mode: manual assembly or mould are fitted or the method for machine lamination or vacuum lamination, and by the extruding or the mode of vacuum suction the air between the binding face are discharged.
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| CN2010105670035A CN102062984A (en) | 2010-11-29 | 2010-11-29 | Electrophoretic display device and manufacturing method thereof |
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| CN2010105670035A CN102062984A (en) | 2010-11-29 | 2010-11-29 | Electrophoretic display device and manufacturing method thereof |
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Application publication date: 20110518 |