WO2012083899A1 - Solution de revêtement d'écran électrophorétique et procédé de préparation de cette solution - Google Patents

Solution de revêtement d'écran électrophorétique et procédé de préparation de cette solution Download PDF

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Publication number
WO2012083899A1
WO2012083899A1 PCT/CN2012/071297 CN2012071297W WO2012083899A1 WO 2012083899 A1 WO2012083899 A1 WO 2012083899A1 CN 2012071297 W CN2012071297 W CN 2012071297W WO 2012083899 A1 WO2012083899 A1 WO 2012083899A1
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Prior art keywords
electrophoretic display
microcapsules
display coating
adhesive
water
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PCT/CN2012/071297
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English (en)
Chinese (zh)
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魏松丽
张磊
杨伟强
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广州奥熠电子科技有限公司
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Publication of WO2012083899A1 publication Critical patent/WO2012083899A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
    • C09D101/08—Cellulose derivatives
    • C09D101/26—Cellulose ethers
    • C09D101/28—Alkyl ethers
    • C09D101/284—Alkyl ethers with hydroxylated hydrocarbon radicals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
    • C09D101/08—Cellulose derivatives
    • C09D101/26—Cellulose ethers
    • C09D101/28—Alkyl ethers
    • C09D101/286—Alkyl ethers substituted with acid radicals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D103/00—Coating compositions based on starch, amylose or amylopectin or on their derivatives or degradation products
    • C09D103/02—Starch; Degradation products thereof, e.g. dextrin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D103/00—Coating compositions based on starch, amylose or amylopectin or on their derivatives or degradation products
    • C09D103/04—Starch derivatives
    • C09D103/08—Ethers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D105/00—Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D189/00—Coating compositions based on proteins; Coating compositions based on derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D189/00—Coating compositions based on proteins; Coating compositions based on derivatives thereof
    • C09D189/04—Products derived from waste materials, e.g. horn, hoof or hair
    • C09D189/06—Products derived from waste materials, e.g. horn, hoof or hair derived from leather or skin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/16757—Microcapsules
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles

Definitions

  • the present invention relates to the technical field of electrophoretic display, in particular to an electrophoretic display coating liquid and a preparation method thereof.
  • Electrophoretic image display namely electrophoretic image display
  • It is the phenomenon of using colloidal dispersed particles to migrate under the action of an electric field. Its advantages are high contrast, large viewing angle, high display brightness, low price, and easy realization of large flat display. Its disadvantage is poor reliability, The threshold characteristics are not easy to control, especially the particles in the dispersion system are prone to agglomeration, precipitation, etc., so the life of the EPID display is relatively short.
  • MIT Massachusetts Institute of Technology
  • the media laboratory put forward the concept of encapsulated electrophoretic ink, that is, microencapsulated electrophoretic display technology (encapsulated electrophoretic ink). electrophoretic display).
  • the pigment particles and the dark dye solution are innovatively wrapped in the microcapsule, and the electrophoretic display is realized in the microcapsule.
  • the shortcomings of agglomeration and deposition of the electrophoretic colloidal particles in the range larger than the size of the capsule are suppressed, and its stability is improved, and the service life is prolonged.
  • Electronic ink is an ink-like suspended matter. Under the action of an external electric field, it can realize reversible, bistable, and flexible display. It is a flexible display material and technology that integrates physics, chemistry, electronics and other disciplines. It has the advantages of good visibility, low power consumption, strong information loading ability, convenient carrying, low manufacturing cost, and no electromagnetic radiation, and can fundamentally solve the deficiencies of the existing flat panel display technology.
  • the current electronic ink uses 30-300 Micron spherical transparent and smooth microcapsules are coated with the dielectric suspension, in which there are charged electrophoretic particles. These capsules are distributed in the polyurethane adhesive to form a dispersion system, which is coated or printed on flexible ITO On the conductive film, a principle-type flexible EPID electronic paper is formed.
  • the capsules cannot be dispersed well in the polyurethane adhesive, and there are disadvantages such as agglomeration of the capsules in a larger size range. This makes it difficult to apply when coating methods such as roll coating, screen printing, spraying, etc., the appearance of the coating film is poor, and there are various appearance defects, including voids, scratches, bumps, dead spots, etc. , which makes the yield rate lower.
  • the shrinkage force of the polyurethane during the drying process is not large enough, the capsule is not easy to deform, the gap between the capsule and the capsule is large, the capsule is not spread well on the substrate, and the single-layer arrangement cannot be realized. Performance is poor.
  • the technical problem to be solved by the present invention is to provide an electrophoretic display coating liquid and a preparation method thereof, which can solve the various technical defects mentioned above.
  • the microcapsules have better dispersibility in the electrophoretic display coating liquid. When the display coating liquid is dried, the microcapsules therein will be deformed, thereby effectively improving the photoelectric performance of the electrophoretic display coating liquid.
  • the present invention provides an electrophoretic display coating solution, which contains microcapsules, and the microcapsules contain a suspension and a plurality of charged pigment particles dispersed in the suspension, and the charged pigment particles are under the action of an electric field. Will move in the suspension; the microcapsules are dispersed in an adhesive, the adhesive contains a water-soluble polymer compound and water, wherein the concentration of the water-soluble polymer compound is 5%-20%; when the adhesive is dry, at least one of the microcapsules is deformed.
  • the water-soluble polymer compound is selected from but not limited to: carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, soluble starch, carboxymethyl starch, gum arabic, gelatin, gum , Soybean protein, polyvinyl alcohol, polyethylene glycol, and composite materials composed of two or more of the above materials.
  • the electrophoresis shows that the weight percentage of the adhesive and the microcapsules in the coating solution is 10%-70% More preferably, the weight percentage of the adhesive and the microcapsules in the electrophoretic display coating solution may preferably be 25-50%.
  • the concentration of the water-soluble polymer compound is preferably 7%-15% .
  • the above electrophoresis shows that the particle size distribution of the microcapsules dispersed in the coating solution has a span value of 0.5-0.7.
  • the aforementioned microcapsules may also contain several neutral pigment particles.
  • the present invention also provides a method for preparing an electrophoretic display coating solution, which includes the following steps: A. Dissolve a certain amount of water-soluble polymer compound in water to prepare an adhesive, wherein the concentration of the water-soluble polymer compound is 5%-20%; B. The adhesive is added to the microcapsules, and the electrophoresis display coating solution is prepared after stirring and mixing. Specifically, the above-mentioned electrophoresis shows that the weight percentage of the adhesive and the microcapsules in the coating solution is 10%-70%.
  • the present invention also provides a method for preparing an electrophoretic display assembly, the electrophoretic display assembly includes a transparent substrate with a transparent conductive layer, the preparation method includes: coating the above-mentioned electrophoretic display coating liquid on the transparent conductive layer When the electrophoretic display coating liquid is dried, at least one of the microcapsules is deformed during drying, and after drying, the electrophoretic display coating liquid forms an electrophoretic display layer.
  • the thickness of the electrophoretic display coating liquid coated on the transparent conductive layer in the above steps is about 50-300 ⁇ m ;
  • the thickness after drying and curing is about 20-120 ⁇ m .
  • the electrophoresis shows that the adhesive in the coating solution shrinks and becomes flat when dried; after drying, the cross section of the microcapsule changes from a circular or elliptical shape to a polygonal shape.
  • the adhesive in the electrophoretic display coating solution of the present invention is a water-soluble polymer solution, it is beneficial to the dispersion of microcapsules in water and effectively reduces the agglomeration between microcapsules. It can produce a certain shrinkage stress during drying, thereby deforming the microcapsules dispersed therein.
  • the electrophoretic display coating solution of the present invention can realize a single-layer coating film due to its better adhesive fluidity. , The surface of the coating film is smooth, and the density of microcapsules in the electrophoretic display layer after drying is higher, thereby effectively improving the photoelectric performance of the electrophoretic display coating liquid.
  • FIG. 1 is a drawing of the coating appearance of an existing electrophoretic display coating liquid
  • FIG. 2 is a drawing of the appearance of an electrophoretic display coating liquid in an embodiment of the present invention
  • Fig. 3 is a preparation flow chart of an embodiment of a preparation method of an electrophoretic display assembly of the present invention
  • 4 is a preparation flow chart of an embodiment of a preparation method of an electrophoretic display coating solution of the present invention
  • 5 is a schematic diagram of the structure of the electrophoretic display assembly when the electrophoretic display coating liquid is just coated in step S2 in FIG. 3 of the present invention
  • 6 is a schematic diagram of the structure of the electrophoretic display assembly after the electrophoretic display coating liquid coated in step S2 in FIG. 3 of the present invention is dried.
  • the invention discloses an adhesive material that can be used in an electrophoretic display coating solution.
  • This adhesive is made by dissolving a water-soluble polymer compound in water; previously this material is mainly used in medicine, Industry fields such as tablets and food processing.
  • Water-soluble polymer compounds are also called water-soluble resins or water-soluble polymers.
  • the usually said water-soluble polymer is a highly hydrophilic polymer material that can be dissolved or swelled in water to form an aqueous solution or dispersion system.
  • Water-soluble polymers are generally divided into three categories according to their sources: 1 , Natural water-soluble polymer. Extracted from natural animals and plants; such as starch, cellulose, vegetable glue, animal glue, etc.; 2 1. Chemically modified natural polymers; mainly include modified starch and modified cellulose; such as carboxymethyl starch, acetate starch, hydroxymethyl cellulose, carboxymethyl cellulose, etc.; 3. Synthetic polymers. There are two types of polymer resins and condensation resins, such as Polyacrylamide (PAM), hydrolyzed polyacrylamide (HPAM)), polyvinylpyrrolidone (PVP), etc.
  • PAM Polyacrylamide
  • HPAM hydrolyzed polyacrylamide
  • PVP polyvinylpyrrolidone
  • Water-soluble polymer materials mainly have the following functions: 1 water solubility, 2 dispersion, 3 flocculation, 4 viscosity increasing, 5 Drag reduction effect, 6 rheology.
  • the electrophoresis display coating solution of the present invention contains microcapsules, and the microcapsules contain a suspension and a plurality of charged pigment particles (same polarity or different polarities) dispersed in the suspension. Of course, it can also contain several medium. Charged pigment particles; these microcapsules are uniformly dispersed in the adhesive, and the electrophoretic display coating liquid is coated on the transparent conductive layer (such as ITO), after the electrophoretic display coating solution is dried, it will be on the ITO A very thin electrophoretic display layer is formed on the layer. If a certain voltage is applied to both sides of the electrophoretic display layer, the charged pigment particles in the microcapsules in the electrophoretic display layer will undergo electrophoresis in the suspension to realize electrophoretic display.
  • ITO transparent conductive layer
  • the adhesive used in the present invention is made by dissolving a transparent and glossy powdery granular water-soluble polymer compound in water; this water-soluble polymer compound includes but is not limited to: carboxymethyl cellulose, hydroxyethyl fiber Vegetarian, hydroxypropyl methylcellulose, soluble starch, carboxymethyl starch, gum arabic, gelatin, gum, soy protein, casein, polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyvinylpyrrolidone, etc. Mixtures and derivatives.
  • the water-soluble polymer compound When preparing the adhesive, the water-soluble polymer compound needs to be in the range of 30-70 The concentration of water-soluble polymer compound in the above-mentioned adhesive is 5%-20%; preferably in the range of 7%-15%; the best is 10% about.
  • the adhesive After the adhesive is prepared, it is mixed with the microcapsules in a certain ratio, that is, the microcapsules are dispersed into the prepared adhesive, and the prepared electrophoresis displays the percentage of the adhesive to the microcapsules in the coating solution control in Between 10%-70%, preferably 25%-50%; preferably around 40%.
  • Electrophoresis shows that the microcapsules in the coating solution can be uniformly dispersed in the water-soluble polymer solution (ie, the adhesive), and the particle size distribution span of the dispersed microcapsules is 0.5-0.7; effectively reduce the agglomeration of microcapsules and other problems.
  • the adhesive is dried at room temperature, at least one of the dispersed microcapsules will deform.
  • the present invention also provides a method for preparing an electrophoretic display assembly from the above-mentioned electrophoretic display coating solution.
  • the specific implementation steps of the method are shown in FIG. 3 ; Refer to Figure 5 and Figure 6 for the structure diagram of the electrophoretic display assembly before and after the drying of the coated electrophoretic display liquid.
  • S1 First, coat a transparent conductive layer 22 on a transparent substrate 33.
  • PET can be used as a transparent substrate.
  • ITO Indium Tin Oxide
  • the material can be selected from, but not limited to, epoxy resin, polyurethane, silicone adhesive, polyacrylic and polyacrylate adhesive, and a combination of two or more of the above materials Material.
  • the above-mentioned electrophoresis shows that the water-soluble polymer compound in the coating solution can produce a certain shrinkage stress during the drying process of the adhesive, which can effectively deform the microcapsules, so that the microcapsules can be tightly packed after deformation, as shown in Figure 2. Shown.
  • the density of microcapsules in the electrophoretic display layer formed after drying is greatly increased, which increases the density of electrophoretic particles on the electrode side when an electric field is applied to generate electrophoresis. In this way, the measured black and white reflectivity is also greatly increased, and the contrast is also improved. .
  • the water-soluble polymer compound used in the present invention has a certain surface activity, which can reduce the surface tension of water to a certain extent, help the wetting of the wall of the microcapsule by water, and thus facilitate the dispersion of the microcapsule in water. Effectively reduce the agglomeration between microcapsules.
  • such water-soluble polymer compounds have certain rheological properties, so the prepared electrophoresis shows that the coating liquid has better leveling properties and the coating appearance can be greatly improved, as shown in the figure 2 shown.
  • the electrophoretic display coating liquid prepared with the above-mentioned water-soluble polymer compound has a better appearance and better photoelectric properties. Specifically, the microcapsules can be deformed when the electrophoretic display coating solution is dried, the deformed capsules are tightly packed, the density of electrophoretic particles on the electrode side during electrophoresis increases, and the contrast is improved. Compared with other electrophoretic display coating liquids prepared with polyurethane adhesives, the electrophoretic display coating liquid of the present invention has higher contrast 3-4.
  • the present invention also provides a preparation method of the above-mentioned electrophoresis display coating liquid.
  • the preparation process of the method is simple and feasible, the preparation process is easy to control, and there is no special requirement for equipment.
  • the preparation method of the electrophoretic display coating solution includes the following steps: S01. Dissolve a certain amount of water-soluble polymer materials in water to prepare an adhesive, wherein the concentration of the water-soluble polymer is 5%-20%; S02. Filter the adhesive prepared above to remove impurities in the adhesive; S03. Weigh a certain amount of microcapsules for centrifugation, then add water to adjust the solid content; then mix with the adhesive filtered in step S02; the percentage of adhesive to microcapsules is controlled at 10%-70% Between, preferably 40%; S04. After stirring for a period of time, an electrophoretic display coating solution is prepared.
  • the stirring speed in the above step S04 may specifically be 50-300 revolutions per minute; the best is 250 revolutions per minute.
  • the prepared electrophoretic display coating solution should be at about 30 degrees Celsius (about 20 to 40 degrees Celsius). It can be used for coating only after it is stored for a certain period of time in the ambient temperature within the range of Celsius. The storage time is determined by the total amount of the electrophoresis display coating solution prepared. The more the amount, the longer the time. Generally, it can be stored for about half an hour to two hours.
  • the prepared electrophoresis shows that the coating solution should be stored in 5-10 Generally, it can be stored in a refrigerator or freezer in degrees Celsius for about a week; each time you need to use it, take out the required amount.
  • the electrophoresis display coating solution just taken out needs to pass 30-50 It is dissolved in a water bath at a temperature of degrees Celsius, and then can be used for coating.
  • Electrophoresis shows the preparation process of the coating solution
  • the electrophoretic display coating liquid can be accurately coated or printed on the substrate with a transparent conductive layer by using a coater, and then heated and cured to produce a multi-layer compactly arranged electrophoresis Display layer. Subsequently, the electrophoretic display material layer and the conductive layer are hot pressed together, and a spectrophotometer is used to test the black and white reflectance, contrast and other data of the electrophoretic display film after power-on driving. From the table below 1 It can be seen that the electrophoretic display film prepared from the electrophoretic display coating liquid of the present invention has the advantages of high contrast (greater than 7) and high white reflectivity (greater than 40%).
  • the L* value reflects the reflected light intensity of the display film. The higher the L* value, the stronger the reflectivity; 2.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Manufacturing Of Micro-Capsules (AREA)

Abstract

L'invention concerne une solution de revêtement d'écran électrophorétique contenant des microcapsules. Les microcapsules renferment une solution de suspension et une pluralité de particules de pigments chargées, dispersées dans la solution de suspension. Les microcapsules sont dispersées à travers un adhésif. L'adhésif est obtenu par dissolution dans l'eau d'un composé macromoléculaire hydrosoluble ayant une densité de 5 - 20 %. Lorsque l'adhésif sèche, au moins une des microcapsules contenues dans celui-ci change de forme. L'invention concerne également un procédé de préparation de la solution de revêtement d'écran électrophorétique ainsi qu'un procédé d'utilisation de la solution de revêtement d'écran électrophorétique pour fabriquer un ensemble d'écran électrophorétique.
PCT/CN2012/071297 2010-12-20 2012-02-18 Solution de revêtement d'écran électrophorétique et procédé de préparation de cette solution WO2012083899A1 (fr)

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CN2010105967408A CN102093785B (zh) 2010-12-20 2010-12-20 一种电泳显示涂布液及其制备方法
CN201010596740.8 2010-12-20

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CN102093785B (zh) * 2010-12-20 2013-12-11 广州奥熠电子科技有限公司 一种电泳显示涂布液及其制备方法
CN103365018B (zh) * 2012-04-07 2019-03-22 广州奥翼电子科技股份有限公司 电泳显示媒质、光电显示器及其组件和制作方法
CN104073109B (zh) * 2013-03-27 2016-08-03 广州奥翼电子科技有限公司 一种电泳显示涂布液及其制备方法
CN104073049A (zh) * 2013-03-27 2014-10-01 广州奥翼电子科技有限公司 一种电泳显示涂布液、电子纸显示元件、电子纸显示器和电子设备
CN107608112A (zh) * 2017-09-21 2018-01-19 重庆秉为科技有限公司 像素结构及其像素结构的显示器
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