CN102809863A - Microcapsule array electrophoretic display component and preparation method thereof - Google Patents
Microcapsule array electrophoretic display component and preparation method thereof Download PDFInfo
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Abstract
The invention provides a preparation method of a microcapsule array electrophoretic display component. The preparation method comprises the following steps of: a) preparing retaining wall arrays on a light transmission substrate with a transparent conductive layer, wherein the retaining wall arrays and the substrate form a plurality of micro cavities; and b) injecting corresponding electrophoretic display microcapsules into target cavities of the retaining wall arrays. The invention further provides the microcapsule array electrophoretic display component. Through the adoption of the preparation method provided by the invention, a color electrophoretic display device can be prepared; and the color electrophoretic display device prepared by the preparation method provided by the invention has a better color display effect.
Description
Technical field
The present invention relates to a kind of electrophoretic display apparatus and preparation method thereof, relate in particular to a kind of microcapsules array electrophoresis display module and preparation method thereof.
Background technology
Electrophoretic display device (EPD) (EPD) is based on a kind of non-emanative device that the electrophoresis that is suspended in the charged pigment particles in the solvent is processed.Several kinds of dissimilar electrophoretic display device (EPD)s are arranged.In the partition type electrophoresis showed (referring to M.A.Hopper and V.Novotny, the electric bundling of Institute of Electrical and Electric Engineers collection of thesis (IEEE Trans.Electr.Dev.) volume 26.Wherein electrophoresis microcapsule is meant the encapsulated technology that adopts; Electrophoresis liquid is contained in wherein; Each capsule comprises solvent, be suspended in the solvent and through applying a plurality of charged corpuscles that electric field can pass solvent to suspending liquid, and the capsule wall that surrounds solvent and charged corpuscle.
Compare with traditional flat panel display, it is low, flexible that electrophoresis showed possesses energy consumption, contrast height, high bistability, visual good, use simple.In conjunction with the advantage that shows of traditional paper and electronics, electrophoresis showed is the technology of tool potentiality in the current Electronic Paper application.Electrophoretic display technology proposes about the seventies in last century greatly, and progressively earns widespread respect.Present Electronic Paper basically all is a black and white, and colorize is the inexorable trend of Electronic Paper development.
What the color electric paper that utilizes the electrophoresis showed principle to realize at present adopted mostly is that colored filter is superimposed upon the technology path on the black and white Electronic Paper; This color electric paper implements than is easier to; Yet the color electric paper that utilizes colored filter to realize can be because the influence of colored filter causes the contrast of Electronic Paper to reduce; The colour that shows seems that comparison is dull, and whole display effect is general.
Summary of the invention
Technical matters to be solved by this invention is to be the basis with existing electrophoretic display technology, and a kind of microcapsules array electrophoresis display module and preparation method thereof is provided, and realizes directly that on the single display screen image of multiple color or full color shows.
The invention provides a kind of preparation method of microcapsules array electrophoresis display module, it may further comprise the steps:
A) having preparation barricade array on the transparent substrates of transparency conducting layer, this barricade array and substrate have constituted some small cavitys;
B) in the target cavity of barricade array, inject corresponding electrophoretic display microcapsule.
Particularly; The method for preparing the barricade array in the above-mentioned step a) can adopt following steps: the material of coating one deck heat curing or radiation curing on said transparent substrates; Utilize formpiston that the material that is coated on the substrate is carried out coining; Through heating thermosetting material is cured then, or radiation curing material is cured through radiation.
As another kind of embodiment, the method for preparing the barricade array in the above-mentioned step a) also can adopt following steps: coating one deck radiation curing material on said transparent substrates, then with the method for the photoetching needed barricade array that makes public to, and develop.
As one embodiment of the present invention, said step b) specifically comprises the steps:
B1, preparation N bar printing masterplate, the some hollow out via holes on every bar printing masterplate are corresponding with one group of cavity that barricade array N organizes in the cavity respectively, and initializing variable n equals 1;
B2, above said barricade array, place n bar printing masterplate, the n that the hollow out via hole on this printing stencil is corresponding with it organizes cavity and aims at respectively;
B3, the n kind microcapsules of correspondence are injected in the corresponding n group cavity through the hollow out via hole on the printing stencil;
B4, n bar printing masterplate is removed, treated that microcapsules are at the cavity inner drying;
B5, n is added 1, repeating step b2, b3, b4; Till n equals N.
Particularly, the thickness of above-mentioned n bar printing masterplate is Tn≤D* (Tn2-Tn1)/Tn1, n=1 wherein, 2,3 ... N, N>=2; Tn2 is the wet-film thickness of n kind microcapsules, and Tn1 is the dried builds of n kind microcapsules, and D is the wall height of said barricade array.
Further, at above-mentioned steps b) comprise also that afterwards step c) is coated with one deck adhesive above said barricade array, and on adhesive adhesive release sheets or drive electrode substrate.
Particularly, the cross sectional shape of each cavity of above-mentioned barricade array can be foursquare or rectangle.Above-mentioned barricade array is white or black or transparent.The barricade thickness of barricade array is 1～100 μ m, preferred 1～50 μ m; The length of side of each cavity that said barricade array constitutes is 10-1000 μ m, preferred 50-200 μ m.
As a kind of preferred implementation of the present invention; Above-mentioned N can value be 4; Above-mentioned microcapsules comprise four kinds of different microcapsules; Every kind of microcapsules show two kinds of various colors at least, and these four kinds of microcapsules are respectively black/white microcapsules, red/white color microcapsules, blue/white microcapsules and green/white microcapsules; Perhaps, these four kinds of microcapsules are respectively black/white microcapsules, cyan/white microcapsule, magenta/white microcapsule and yellow/white microcapsule.
The present invention also provides a kind of microcapsules array electrophoresis display module, and it comprises that one has the transparent substrates of transparency conducting layer, and the transparency conducting layer of this transparent substrates is provided with the barricade array, and this barricade array and substrate have constituted some small cavitys; In each cavity, filled corresponding electrophoretic display microcapsule.
Further, above said barricade array, can be provided with one deck adhesive layer, can adhesive release sheets or drive electrode substrate on this adhesive layer.
Utilize method of the present invention can prepare a kind of color electric phoretic display device, its colored display effect of color electric phoretic display device of utilizing the present invention to prepare is better.
Description of drawings
Fig. 1 is the cross sectional representation of an electrophoretic display apparatus of the present invention dot matrix in one embodiment;
Fig. 2 is the electrophoretic display apparatus of the present invention floor map of its viewing area in one embodiment;
Fig. 3 is the synoptic diagram of Fig. 2 dashed circle place after wherein 2 dot matrix amplify;
Fig. 4 is the mould design diagram;
Fig. 5 comes printing color microcapsules synoptic diagram for using graphic arts die;
Fig. 6 is the synoptic diagram of a kind of punch (formpiston) of using of the present invention;
Fig. 7 is the barricade synoptic diagram that utilizes a kind of embodiment of the inventive method to make.
Embodiment
Existing electrophoretic display panel mainly is based on microcapsules or little glass of technology; The present invention is based on microcapsules technology; Through selecting the particulate and the solvent of different colours; Or select the particulate of two kinds of different colours, and can produce the microcapsules of different colours, the microcapsules of this different colours provide the foundation for this invention.Among the present invention; Said " colour " comprises " black " and " white "; Said " colored microcapsules " are meant and comprise different particulate of multiple color and solvent in the microcapsules; At least be the particulate of two kinds of different colours and transparent solvent, or be to have a kind of particulate of color and the solvent of another kind of color at least.
The present invention relates to a kind of color electric phoretic display device; Its display layer plane domain is divided into the dot matrix of many groups; A pixel of the corresponding display frame of each dot matrix; And each dot matrix is made up of several times dot matrix again, and this each time dot matrix just is made up of corresponding with it a kind of colored microcapsules, and the colored microcapsules of these times dot matrix are in the zone that is placed between barricade.The electrophoresis showed layer is to be printed on first substrate, coats adhesive second substrate on the lamination more then.
The present invention relates to two kinds of display device:
At least one substrate is the semi-manufacture of temporary base in (1) first substrate and second substrate, and another substrate can be temporary base, transparent common electrode substrate or control electrode substrate, and conductive layer one side that has the substrate of conductive layer is facing to display layer;
One of them substrate of (2) first substrates and second substrate is transparent common electrode substrate, and another substrate is the finished product of control electrode substrate, and conductive layer one side of two substrates is facing to display layer.
Above-mentioned display layer comprises the barricade array, in the barricade array, is perfused with the colored microcapsules that are dispersed in the bonding agent.Bonding agent comprises the potpourri of polymer adhesive and adjuvant, and this adjuvant is selected from conductive metal powder, ferrofluid, non-reactive solvent, conductive organic compound and bond thereof.Bonding agent includes available polyurethane, vinyl acetate ethene, epoxy or polyacrylic based etc.
The planar dimension of above-mentioned single dot matrix (long or wide) is generally the 1-20000 micron, preferred 50-3000 micron, more preferably 100-1000 micron, most preferably 150-500 micron.
The planar dimension of above-mentioned single dot matrix (long or wide) is generally the 1-20000 micron, preferred 10-1000 micron, more preferably 30-400 micron, most preferably 50-200 micron.
The height of above-mentioned dot matrix and time dot matrix, promptly the distance between first substrate and second substrate is generally the 1-1000 micron, preferred 5-500 micron, more preferably 10-200 micron, most preferably 10-100 micron.
Above-mentioned dot matrix can be made up of several times dot matrix, is generally dot matrix 6 times, is preferably dot matrix 4 times.Adopt the colored microcapsules of 4 kinds of different colours on these 4 time dot matrix; Concrete scheme can for: a kind of microcapsules are for contain the electrophoresis microcapsule of adularescent and black colorant simultaneously; Other three kinds of microcapsules respectively contain two kinds of colorants; Three kinds of wherein a kind of colorants of microcapsules are same colors; And the another kind of colorant of these three kinds of microcapsules is three kinds of various colors, and the identical colorant of said these three kinds of microcapsules can white color agents or black colorant, and three kinds of various colors in addition of said these three kinds of microcapsules can be RGB (red/green) or CMY (yellow/magenta/cyan).The color combination of four kinds of different colored microcapsules can be respectively black/white, red/white color, blue/white and green/white; Can also be respectively black/white, cyan/white, magenta/white and yellow/white; Black/white, red/black, blue/black and green/black; Can also be respectively black/white, cyan/black, magenta/black and yellow/black.The color combination of microcapsules is preferably black/white, red/white color, blue/white and green/white and black/white, cyan/white, magenta/white and yellow/white.
Described temporary base can be a substrate layer, also can be to comprise substrate layer and be coated on the conductive layer on the base material, and wherein conductive can be selected from indium tin oxide (ITO), zinc paste (ZnO), tin ash (SnO
2), indium oxide (In
2O
3), carbon (C), gold (Au), silver (Ag), copper (Cu), aluminium (Al); And substrate material is selected from PET, nylon, polystyrene, tygon, polymethylmethacrylate or PVC etc.The PET that preferably has the aluminium film.
Described adhesive can be selected for use and comprise polyurethane, vinyl acetate ethene, epoxy or the potpourri of polyacrylic based.
Described transparent common electrode substrate comprises transparent substrate layer and is coated on the transparency conducting layer on the transparent base that wherein the electrically conducting transparent layer material is optional from indium tin oxide (ITO), zinc paste (ZnO), tin ash (SnO
2) or indium oxide (In
2O
3); And transparent substrate material can be selected from PET, nylon, polystyrene, tygon, polymethylmethacrylate or PVC.Transparent common electrode substrate preferably is coated with the plastics of ITO, more preferably is coated with the polyester material of ITO, further preferably is coated with the PET of ITO again.
Said control electrode substrate comprises substrate layer and conductive layer, and wherein conductive can be selected from tin-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 Film Transistor), OTFT (Organic Thin Film Transistor) or the like; And substrate material is selected from PET, nylon, polystyrene, tygon, polymethylmethacrylate or PVC, epoxy resin, FR-4, glass etc.The TFT of control electrode substrate preferred glass substrate and the OTFT of flexible base, board.
Be made up of many groups electrode on the described control electrode substrate, each electrode can carry out Control of Voltage to one dot matrix zone, comprises the size and the driving time of voltage.
Said two substrates are respectively the transparent common electrode substrate and the finished product of control electrode substrate; Each electrode on the control panel can independently carry out the control of voltage to corresponding dot matrix; Can be through the driving time of regulation voltage and size or voltage; Perhaps the size and the driving time of while regulation voltage with this color gray scale that changes the corresponding colored microcapsules of time dot matrix, finally demonstrate the display effect of multiple color.
Described colored microcapsules dot matrix is to adopt a cover hollowed printing mould printing, the corresponding a kind of colored microcapsules of graphic arts die.
Electrophoretic display apparatus of the present invention is simple relatively on technology and structure, implements easily, controls through the color to the colored microcapsules of inferior dot matrix, can realize the demonstration of full color.
A kind of embodiment of color electric phoretic display device of the present invention is as shown in Figure 1, and Fig. 1 just explains the synoptic diagram of a half-finished dot matrix xsect.Dot matrix is made up of 4 dot matrix among this figure, only is here certainly to illustrate this to invent, and the dot matrix number among the present invention in dot matrix is not limited thereto figure; Not necessarily be 3 microcapsules on each time dot matrix among the figure, concrete microcapsules number is decided according to the actual conditions of design.Among Fig. 1, bottom one deck is a ground floor substrate 110, and uppermost is second layer substrate 130, and middle is display layer and adhesive layer, and conductive layer one side of substrate that wherein has conductive layer is facing to display layer.
Among Fig. 1 120 is adhesive layers, and adhesive can be selected for use and comprise polyurethane, vinyl acetate ethene, epoxy or the potpourri of polyacrylic based.
The present invention relates to two kinds of display device:
At least one substrate is the semi-manufacture of temporary base in (1) first substrate and second substrate, and another substrate can be temporary base, transparent common electrode substrate or control electrode substrate, and conductive layer one side that has the substrate of conductive layer is facing to display layer;
One of them substrate of (2) first substrates and second substrate is transparent common electrode substrate, and another substrate is the finished product of control electrode substrate, and conductive layer one side of two substrates is facing to display layer.
Transparent common electrode substrate comprises transparent substrate layer and is coated on the transparency conducting layer on the transparent base that wherein the electrically conducting transparent layer material is optional from indium tin oxide (ITO), zinc paste (ZnO), tin ash (SnO
2) or indium oxide (In
2O
3); And transparent substrate material can be selected from PET, nylon, polystyrene, tygon, polymethylmethacrylate or PVC.Transparent common electrode substrate preferably is coated with the plastics of ITO, more preferably is coated with the polyester material of ITO, further preferably is coated with the PET of ITO again.
The control electrode substrate comprises substrate layer and conductive layer, and wherein conductive can be selected from tin-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 Film Transistor), OTFT (Organic Thin Film Transistor) or the like; And substrate material is selected from PET, nylon, polystyrene, tygon, polymethylmethacrylate or PVC, epoxy resin, FR-4, glass etc.The TFT of control electrode substrate preferred glass substrate and the OTFT of flexible base, board.
Topmost one deck is interim panel, can be to have only substrate layer, or comprises substrate layer 142 and be coated on the conductive layer on the base material), wherein conductive can be selected from indium tin oxide (ITO), zinc paste (ZnO), tin ash (SnO
2), indium oxide (In
2O
3), carbon (C), gold (Au), silver (Ag), copper (Cu), aluminium (Al); And substrate material is selected from PET, nylon, polystyrene, tygon, polymethylmethacrylate or PVC etc.The PET that preferably has the aluminium film.
Fig. 2 is the floor map of color electric phoretic display device viewing area; Whole viewing area is divided into various dot matrix; Each dot matrix is a square; The pixel of corresponding display frame is accomplished the demonstration of picture corresponding pixel points through the color effects of each dot matrix, thereby is reached the demonstration of whole image.
Fig. 3 is the synoptic diagram after wherein 2 dot matrix 160 among Fig. 2 and 170 are amplified, and wherein left side dashed rectangle is a dot matrix 160, and the right dashed rectangle is a dot matrix 170, and 180 are barricades.Each dot matrix all is made up of several times dot matrix, and the example of takeing here is that each dot matrix is made up of 4 dot matrix.On each time dot matrix is different colored microcapsules.Fig. 3 just explains the floor map of display device; Each dot matrix of practical design not necessarily just adopts 4 dot matrix among the figure; And be not necessarily 9 microcapsules on each time dot matrix, concrete inferior dot matrix number and microcapsules number are decided according to practical design.
The size of each dot matrix and the display area of whole display device; Reaching the distance of observing when using all has relation, but also relevant with the size of colored microcapsules, shows after deliberation; The planar dimension of single dot matrix should be in the scope of 1-20000 micron; Preferred 50-1500 micron, more preferably 100-800 micron, most preferably 150-300 micron.
The planar dimension of single dot matrix (long or wide) is generally the 1-20000 micron, preferred 10-1000 micron, more preferably 30-300 micron, most preferably 50-200 micron.
The height of dot matrix and time dot matrix, promptly the distance between common electrode panel and the control electrode panel is relevant with the size of colored microcapsules; And can influence the size of driving voltage, be generally the 1-1000 micron, preferred 5-200 micron; More preferably 10-100 micron, most preferably 20-80 micron.
The number of each dot matrix dot matrix next time is mainly by the size of dot matrix, the color effect that realize, decisions such as the realization difficulty of technology.In current practical application, full color can realize through the combination of three kinds of basic colors or the combination of more colors.For example LCDs is to express other colors through the various combination of red (Red), green (Green), blue (Blue) three kinds of colors, i.e. the RGB system; In colour print and printing technology, three kinds of basic colors are cyan (Cyan), pinkish red (Magenta) and yellow (Yellow), i.e. CMY system.In electrophoretic display panel, Essential colour can adopt the RGB system, also can adopt the CMY system, perhaps other colour systems.
Cyan in the electrophoretic display apparatus, magenta and yellow microcapsules; Can adopt corresponding cyan, magenta and yellow electrophoresis disclosing solution to realize the CMY basic colors, these three kinds of color microcapsules also contain the solid pigment particle or the organic dyestuff of another kind of same color (white or black).In the present invention, for white and black are provided preferably, can also increase a kind of black/white electrophoresis microcapsule.Though a greater variety of color combination can provide abundant more color and broad chromatogram; But this can significantly increase the workload of color Control Software and the complexity of control circuit in the practical application of electrophoresis showed, also can increase the preparation difficulty and the production procedure of electrophoretic display materials simultaneously.Therefore the combination of the preferred four kinds of electrophoretic display microcapsules of the present invention realizes the electrophoresis showed of full color; Be that each dot matrix is made up of four dot matrix; The electrophoresis disclosing solution that more preferably contains three kinds of Essential colour of RGB and other a kind of public color respectively adds the combination of black/white electrophoresis microcapsule; RGBW is promptly used in the combination of further preferred R/W (red/white), G/W (green/white), B/W (blue/white) and K/W (black/white) electrophoresis microcapsule.
Displaying principle
The corresponding control electrode of each of finished product time dot matrix; Signal controlling color electrophoresis microcapsules through the input of the control electrode on the inferior dot matrix form the various colors gray scale; The combination of the different colours gray scale of the not homogeneous dot matrix under the same dot matrix; Can demonstrate the color of object of this dot matrix, the respective pixel of the corresponding picture of each dot matrix, thus demonstrate whole colour picture.
The present invention is with the combination of R/W (red/white), G/W (green/white), B/W (blue/white) and K/W (black/white) electrophoresis microcapsule, and promptly 4 dot matrix are the driving method of example account for color.Red/white microcapsules are driven into redness, green/white microcapsules are driven into white, with Huang/microcapsules are driven into white in vain, can demonstrate redness, and the gray scale that can regulate the black/white microcapsules is regulated the brightness value of whole redness; Equally, access green and blueness; Whole microcapsules are driven into white, and then show white drives white inverse state with whole microcapsules, then shows black.Driving voltage size or driving time through each time lattice electrode of accurate control or control voltage swing and driving time simultaneously; Can realize the variation of the different colours gray scale of the colored microcapsules part that sub-electrode is corresponding; As passing through the sub-electrode Control of Voltage; Can let the various gray scales of red/white microcapsules in realizing from the redness to white, regulate the brightness of color through these three kinds of microcapsules shades of colour gray scales and black/white microcapsules; Can be combined into shades of colour, reach the purpose that full color shows.
Method for making
1, at first on substrate, makes barricade.The making of barricade comprises but is not limited to adopt the method for photoetching, method, the letterpress of punch (formpiston) coining.The method of photoetching is the material that on substrate, is coated with the last layer radiation-hardenable, comes out with the method for the photoetching barrier wall structure that to need that makes public then, and develops, and produces barricade.And the punch coining is to produce punch earlier, and the structure and shape of punch is that the barrier wall structure made from needs is to be in the nested relation of convex-concave, and just punch is the structure of protrusion, and barricade is a recessed structure in contrast.Make the method for barricade; Be on substrate, to be coated with earlier the composition that last layer includes thermoset resin, thermoplastic resin or its precursor; And then use through being heated to and be close under the glass temperature that is higher than material, controlled pressure carries out coining with punch to the coating that is coated on the substrate.Thermosetting or thermoplastic be meant have multi-functional methacrylate or acrylic ester, vinethene, epoxide, and polymkeric substance, oligomer and analog.Most preferably multi-functional acrylic ester and oligomer thereof.Said composition can comprise polymkeric substance, oligomer, monomer and adjuvant, or has only oligomer, monomer and adjuvant.The scope that the glass temperature of this type material is selected for use usually is from-60 ℃ to 160 ℃, preferably from 0 ℃ to 70 ℃.
2, be that microcapsules with various different colours are placed on respectively in the cavity between the target barricade then, the method for use includes but not limited to modes such as spraying printing, coating.The invention provides a kind of new method, accomplish with specific graphic arts die exactly.
The method for making of colored microcapsules dot matrix of the present invention is through the graphic arts die printing.To be a cover by polylith be used to print based on the flat board of the electrophoretic display apparatus of microcapsules graphic arts die forms; The microcapsules that different offset printings is different, dull and stereotyped number have the via hole of hollow out by the kind decision of need printing color microcapsules on the flat board; Each via hole is corresponding with the position that needs the printing microcapsules; In the printing process, earlier graphic arts die is placed on the main substrate, the colored microcapsules that will print then are placed on the graphic arts die; Use the mode of blade coating, the microcapsules that will print through the via hole on the mould are printed onto on the position of target.
To print 4 kinds of colored microcapsules time dot matrix is example, and the design of graphic arts die is described.Need the semi-manufacture 400, of printing to have 8 dot matrix, a dot matrix is made up of 4 dot matrix, promptly is to need 4 kinds of different colored microcapsules of printing.During the design and printing mould; The design dot pattern, and add alignment mark, like " ten " word mark among the figure; Print need the inferior dot pattern and the alignment mark of capsule of the same race and form a mould; Split like this, can form the Graphics Design of 4 moulds, like 410,420,430 and 440 among the figure.According to the drawing of design, inferior dot pattern and alignment mark with corresponding drawing on flat board carry out the hollow out processing, just form mould, and printing for ease can increase frame on each mould.
The thickness of mould is the display layer thickness that is related to printing, and the mold thickness of the 1st printing is T1≤D* (T12-T11)/T11 in a whole set of graphic arts die, and the mold thickness of n printing is Tn≤D* (Tn2-Tn1)/Tn1; N=2 wherein; 3 ... N, N>=2, Tn2 is n kind microcapsules and the wet-film thickness of binder combination after filming; Tn1 is the build after drying, and D is the height of barricade
The material of mould can be polyester material, stainless steel, brass, nickel, nickel alloy, preferred nickel.Can make mould through el, dry-etching, chemical etching, laser method, electrotyping process method.The nickel metal die made of electrotyping process method preferably.The principle of electrotyping process is a theory of electrodeposition in the Applied Electrochemistry, through electrodeposit metals on core, then the coat of metal is produced the technology of metallic article from the core separation.Electrotyping process; On die substrate, coat earlier light-sensitive surface; Carry out exposure with mask then, and develop, use the mixed electrolytic solution of nickel sulfamic acid (nickel sulfamate) and nickel chloride etc. to carry out electroforming again; Or other electroforming electrolytic solution carries out electroforming, and the template taking with electrotyping process gets off at last.
The method for preparing the electrophoresis showed goods that contain the different microcapsules arrays of N kind (N >=2) with printing stencil is:
A) on substrate, make barricade;
B) the 1st kind of microcapsules are printed on the target area of the 1st kind of microcapsules that constitute by barricade with the 1st printing stencil;
C) dried;
D) use same b) method with n kind (n=2,3 ... N) printing stencil is with n kind (n=2,3 ... N) microcapsules are printed on the target area of the n kind microcapsules that are made up of barricade, repeat c then) carry out dried;
Fig. 5 is that explanation prepares the synoptic diagram of multiple different microcapsules arrays with printing stencil, and this figure only is to be the example explanation with printing R/W (red/white), G/W (green/white), B/W (blue/white) and four kinds of electrophoresis microcapsules of K/W (black/white).On base plate 51, produced barricade array 52 before this; There have with the printing target area with preparation then to be good with printing target area contraposition to the printing stencil 54 that via hole should be arranged; With scraper R/W (red/white) microcapsules 53 are blown in the target area " R " of barricade formation; Accomplish the printing of R/W (red/white) microcapsules, carry out dry processing again.And then use similar method; With other three kinds of microcapsules: G/W (green/white), B/W (blue/white) and K/W (black/white) microcapsules, be printed on respectively among " G ", " B " and " W " successively with preparing to have with the printing stencil of the corresponding via hole in target area.So just accomplished the making of colored microcapsules array.
Illustrate embodiment below, adopt dot matrix 4 kinds times, corresponding is respectively R/W (red/white), G/W (green/white), B/W (blue/white) and four kinds of electrophoresis microcapsules of K/W (black/white).The instance that this paper lifted just is used for helping to set forth the present invention, and does not mean that the present invention just is confined to cited instance.
Embodiment 1: graphic arts die is made
As shown in Figure 4; Semi-manufacture 400 have 8 dot matrix, and each dot matrix has dot matrix 4 times, and correspondence is respectively R/W (red/white), G/W (green/white), B/W (blue/white) and four kinds of electrophoresis microcapsules of K/W (black/white); After adding alignment mark; Design the drawing of 410,420,430 and 440 these 4 moulds respectively, produce corresponding mould through the aspect of electrotyping process, and add upper side frame.
Embodiment 2: the making of barricade
The coating last layer includes the composition of thermoset resin or thermoplastic resin or its precursor on base plate; And then making it near being higher than the glass temperature of material through heating, controlled pressure carries out coining with the coating that 61 pairs of the punch among Fig. 6 (formpiston) are coated on the substrate.Thermosetting or thermoplastic be meant have multi-functional methacrylate or acrylic ester, vinethene, epoxide, and polymkeric substance, oligomer and analog.Most preferably multi-functional acrylic ester and oligomer thereof.Said composition can comprise polymkeric substance, oligomer, monomer and adjuvant, or has only oligomer, monomer and adjuvant.The scope that the glass temperature of this type material is selected for use usually is from-60 ℃ to 160 ℃, preferably from 0 ℃ to 70 ℃.What select here is to gather the methylamino formic ether, gathers the methylamino formic ether with 61 pairs of punch then and impresses, and is cured with 100 ℃ then, accomplishes the making of barricade, as shown in Figure 7.
Embodiment 3: printing
3A, mould 410 is placed on the barricade of being produced by embodiment 2, and via hole is aimed at " R " zone that is made up of barricade, R/W (red/white) microcapsules are poured on the mould, adopt the mode of blade coating, the via hole of microcapsules through hollow out is printed on the main substrate.Air dry is 1 hour in air, puts into baking oven again, and 70 ℃ were dried by the fire 20 minutes;
3B, mould 420 is placed on the base plate that prints G/W (green/white) microcapsules; And via hole aimed at " G " zone that constitutes by barricade; Just with " ten " word alignment mark of " ten " word alignment mark register on first substrate on the mould; Then G/W (green/white) microcapsules are poured on the mould, adopt the mode of blade coating, the via hole of microcapsules through hollow out is printed on the main substrate.Air dry is 1 hour in air, puts into baking oven again, and 70 ℃ were dried by the fire 20 minutes;
3C, use mould 430 that B/W (blue/white) microcapsules are printed onto on the base plate and dry with the mode of 2B;
3D, use mould 440 that K/W (black/white) microcapsules are printed onto on the base plate and dry with the mode of 2B.
Accomplish the making of the electrophoresis showed goods that have R/W (red/white), G/W (green/white), B/W (blue/white) and four kinds of electrophoresis microcapsule arrays of K/W (black/white) at last.
Claims (13)
1. the preparation method of a microcapsules array electrophoresis display module is characterized in that may further comprise the steps:
A) having preparation barricade array on the transparent substrates of transparency conducting layer, this barricade array and substrate have constituted some small cavitys;
B) in the target cavity of barricade array, inject corresponding electrophoretic display microcapsule.
2. preparation method as claimed in claim 1 is characterized in that, the method for preparing the barricade array in the described step a) specifically may further comprise the steps:
The material of coating one deck heat curing or radiation curing utilizes formpiston that the material that is coated on the substrate is carried out coining on said transparent substrates, through heating thermosetting material is cured then, or through radiation radiation curing material is cured.
3. preparation method as claimed in claim 1 is characterized in that, the method for preparing the barricade array in the described step a) specifically may further comprise the steps:
Coating one deck radiation curing material on said transparent substrates then with the method for the photoetching needed barricade array that makes public to, and develops.
4. preparation method as claimed in claim 1 is characterized in that, said step b) specifically comprises:
B1, preparation N bar printing masterplate, the some hollow out via holes on every bar printing masterplate are corresponding with one group of cavity that barricade array N organizes in the cavity respectively, and initializing variable n equals 1;
B2, above said barricade array, place n bar printing masterplate, the n that the hollow out via hole on this printing stencil is corresponding with it organizes cavity and aims at respectively;
B3, the n kind microcapsules of correspondence are injected in the corresponding n group cavity through the hollow out via hole on the printing stencil;
B4, n bar printing masterplate is removed, treated that microcapsules are at the cavity inner drying;
B5, n is added 1, repeating step b2, b3, b4; Till n equals N.
5. preparation method as claimed in claim 4 is characterized in that, the thickness of said n bar printing masterplate is Tn≤D* (Tn2-Tn1)/Tn1, n=1 wherein, 2,3 ... N, N>=2; Tn2 is the wet-film thickness of n kind microcapsules, and Tn1 is the dried builds of n kind microcapsules, and D is the wall height of said barricade array.
6. preparation method as claimed in claim 5 is characterized in that, comprises also that after said step b) step c) is coated with one deck adhesive above said barricade array, and on adhesive adhesive release sheets or drive electrode substrate.
7. preparation method as claimed in claim 1 is characterized in that the cross sectional shape of each cavity of said barricade array is foursquare or rectangle.
8. preparation method as claimed in claim 1 is characterized in that, said barricade array is white or black or transparent.
9. preparation method as claimed in claim 7 is characterized in that, the barricade thickness of said barricade array is 1～100 μ m, and the length of side of each cavity that said barricade array constitutes is 10-1000 μ m.
10. preparation method as claimed in claim 9 is characterized in that, the barricade thickness of said barricade array is 1～50 μ m, and the length of side of each cavity that said barricade array constitutes is 50-200 μ m.
11. preparation method as claimed in claim 5; It is characterized in that; Said N equals 4; Said microcapsules comprise four kinds of different microcapsules, and every kind of microcapsules show two kinds of various colors at least, and these four kinds of microcapsules are respectively black/white microcapsules, red/white color microcapsules, blue/white microcapsules and green/white microcapsules; Perhaps, these four kinds of microcapsules are respectively black/white microcapsules, cyan/white microcapsule, magenta/white microcapsule and yellow/white microcapsule.
12. a microcapsules array electrophoresis display module, it comprises that one has the transparent substrates of transparency conducting layer, it is characterized in that the transparency conducting layer of this transparent substrates is provided with the barricade array, and this barricade array and substrate have constituted some small cavitys; In each cavity, filled corresponding electrophoretic display microcapsule.
13. a kind of microcapsules array electrophoresis display module as claimed in claim 12 is characterized in that, above said barricade array, is provided with one deck adhesive layer, is stained with releasing piece or drive electrode substrate on this adhesive layer.
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