JP4663295B2 - Manufacturing method of information display panel and information display panel - Google Patents

Description

  The present invention displays information by moving a display medium by enclosing the display medium in a cell defined by a partition wall between two substrates, at least one of which is transparent, and applying an electric field to the display medium. The present invention relates to an information display panel manufacturing method and an information display panel.

  2. Description of the Related Art Conventionally, information display devices using techniques such as electrophoresis, electrochromic, thermal, and two-color particle rotation have been proposed as information display devices that replace liquid crystal (LCD).

  Compared to LCDs, these conventional technologies have advantages such as a wide viewing angle close to that of ordinary printed materials, low power consumption, and a memory function. It is considered as a technology that can be used for mobile phones, and is expected to expand to information display for mobile terminals, electronic paper, and the like. Particularly recently, an electrophoretic method in which a dispersion liquid composed of dispersed particles and a colored solution is encapsulated and disposed between opposing substrates has been proposed and is expected.

  However, the electrophoresis method has a problem that the response speed becomes slow due to the viscous resistance of the liquid because the particles migrate in the liquid. In addition, since particles with high specific gravity such as titanium oxide are dispersed in a solution with low specific gravity, it is easy to settle, and it is difficult to maintain the stability of the dispersed state, and there is a problem that the stability of repeated information display is lacking. ing. Even when microencapsulation is performed, the cell size is set to the microcapsule level, and the above-described drawbacks are hardly made to appear, and the essential problems are not solved at all.

  On the other hand, a method in which conductive particles and a charge transport layer are incorporated into a part of a substrate without using a solution is proposed instead of an electrophoresis method using behavior in a solution (see, for example, Non-Patent Document 1). ). However, the structure is complicated because the charge transport layer and further the charge generation layer are arranged, and it is difficult to uniformly inject the charge into the conductive particles.

As one method for solving the various problems described above, after encapsulating the display medium in a cell defined by a partition between two opposing substrates, at least one of which is transparent, an electric field is applied to the display medium. An information display panel that displays information such as an image by moving a display medium is known.
趙 Kuniori and three others, “New Toner Display Device (I)”, July 21, 1999, Annual Meeting of the Imaging Society of Japan (83 times in total) “Japan Hardcopy'99” Proceedings, p.249-252

  In the method for manufacturing an information display panel described above, for example, a partition is formed on one substrate, a display medium is filled in a cell defined by the partition, an adhesive is applied on the partition, and then the other is applied. An information display panel is obtained by overlapping the counter substrates. At this time, at present, an adhesive is applied on the partition using a roll coater, a printing device, or the like, prior to the stacking of the partition and the counter substrate. In this adhesive application process, there are problems such as a problem that the adhesive hangs not only on the partition walls but also in the cells, a problem that the amount of application is difficult to control, and a roll entrainment breakage due to the substrate sticking to the roll. As a result, it was difficult to manufacture an information display panel with a high yield.

  The object of the present invention is to solve the above-mentioned problems, simplify the process, shorten the tact time, reduce the equipment, and improve the yield and improve the yield and the information display panel manufacturing method. Is to provide.

  The method for manufacturing an information display panel according to the present invention includes: enclosing a display medium in a cell defined by a partition wall between two substrates, at least one of which is transparent, and applying an electric field to the display medium. In the method of manufacturing an information display panel for displaying information by moving the partition wall, the partition wall having an adhesive layer provided at the tip thereof is formed by mold transfer when forming the partition wall on the substrate. is there.

  In addition, as a suitable example of the manufacturing method of the information display panel of the present invention, an adhesive is previously applied to the cavity for forming the partition wall of the mold, and the mold is combined with the rib material for forming the partition wall, Pressure is applied to the cavity to fill the rib material, and the mold is released from the rib material, thereby providing an adhesive layer on the partition wall, and bonding that communicates with the bottom of the cavity for forming the partition wall of the mold. Adhesive injection port is provided in the mold, the mold and the rib material for partition formation are combined, pressure is applied to the mold to fill the rib material into the cavity, and adhesive is applied from the adhesive injection port to the bottom of the cavity Inject and fill the adhesive only on the top of the rib material, release the mold from the rib material, provide an adhesive layer on the partition, and react as an adhesive constituting the adhesive layer When using an adhesive, remove the adhesive layer halfway when releasing the mold from the rib material. Be tack-free to reduction, there is.

  The information display panel of the present invention is characterized in that the information display panel is manufactured according to the above-described method for manufacturing an information display panel.

  According to the present invention, when a partition is formed on a substrate, the partition having an adhesive layer provided at the tip thereof is formed by mold transfer, thereby simplifying the process, shortening the tact time, and reducing the equipment. In addition, an information display panel manufacturing method and an information display panel that can improve yield can be obtained.

  First, the basic configuration of the information display panel of the present invention will be described. In the information display panel of the present invention, an electric field is applied to a display medium enclosed in a cell defined by a partition wall between two opposing substrates. A display medium charged at a low potential toward the high potential side along the direction of the applied electric field is attracted by the electric field force or Coulomb force, and the display medium is charged at a high potential toward the low potential side. The medium is attracted by an electric field force, a Coulomb force, or the like, and the display medium reciprocates due to a change in the electric field direction due to a potential change, thereby displaying information such as an image. Therefore, it is necessary to design an information display panel so that the display medium can move uniformly and maintain stability during repeated display or storage. Here, as the force applied to the particles constituting the display medium, in addition to the force attracted by the Coulomb force between the particles, an electric image force with the electrode and the substrate, an intermolecular force, a liquid cross-linking force, gravity and the like can be considered.

  An example of the information display panel of the present invention will be described with reference to FIGS.

  In the example shown in FIG. 1, at least two or more kinds of display media 3 (here, the white particle group 3 </ b> W and the black particle group 3 </ b> B) composed of at least one kind of particles are connected to Depending on the electric field applied from the outside, the substrate is moved perpendicularly to the substrates 1 and 2 and the black particle group 3B is visually recognized by the observer to display black, or the white particle group 3W is visually recognized by the observer. White display. In the example shown in FIG. 1, partition walls 4 are provided between the substrates 1 and 2, for example, in the form of a lattice to define display cells (the front partition is omitted in the figure).

  In the example shown in FIG. 2, at least two or more kinds of display media 3 (here, the white particle group 3 </ b> W and the black particle group 3 </ b> B) composed of at least one kind of particles are provided on the substrate 1. According to the electric field generated by applying a voltage between the electrode 5 and the electrode 6 provided on the substrate 2, the substrate is moved perpendicularly to the substrates 1 and 2, and the black particle group 3B is visually recognized by the observer. Display is performed, or the white particle group 3W is visually recognized by an observer to display white. In the example shown in FIG. 2, partition walls 4 are provided, for example, in a lattice pattern between the substrates 1 and 2 to define display cells (the front partition is omitted in the figure).

  In the example shown in FIG. 3, a display medium 3 (in this case, a white particle group 3 </ b> W) having at least a color and chargeability composed of at least one kind of particles is provided on the substrate 1, Depending on the electric field generated by applying a voltage between them, the white particles 3W are moved in the direction parallel to the substrates 1 and 2 to make the viewer visually recognize the white particle group 3W, or the electrode 6 or The color of the electrode 1 or the substrate 1 is displayed by making an observer visually recognize the color of the substrate 1. In the example shown in FIG. 3, for example, a grid-like partition 4 is provided between the substrates 1 and 2 to define a display cell (the front partition is omitted in the figure).

  The above description can be similarly applied to the case where the white particle group 3W used as the display medium is replaced with a white powder fluid and the black particle group 3B is replaced with a black powder fluid (this powder fluid will be described later). .

  A feature of the present invention relates to a method for manufacturing an information display panel having the above-described configuration. In forming the partition wall 4 on the substrate 1 (2), the partition wall 4 provided with an adhesive layer at the tip thereof is transferred by die transfer. It is to form. Hereinafter, a specific example of the method for producing the information display panel of the present invention will be described with reference to the drawings.

  4A to 4E are diagrams for explaining an example of the method of manufacturing the information display panel of the present invention in the order of steps. In this example, first, as shown in FIG. 4A, an adhesive 13 is provided on the surface of the mold 11 where the partition wall forming cavity 12 exists, and as shown in FIG. By scraping off the excess adhesive 13, the adhesive 13 is preliminarily applied to the cavity 12 for forming the partition wall of the mold 11. Next, as shown in FIG. 4C, the mold 11 is placed in a state where the surface of the mold 11 where the cavity 12 exists is opposed to the rib material 15 for forming the partition wall provided on the substrate 1 (2). The rib material 15 is semi-cured by applying a pressure toward the substrate 1 (2) to the substrate 11 and applying heat or UV depending on the type of the adhesive 13. In this way, the adhesive 13 is made tack-free. Further, in the cavity 12, the rib material 15 is pushed up, and the adhesive 13 remains only at the top of the cavity 12. As a result, as shown in FIG. 4D, the rib material 15 is filled into the cavity 12 filled with the adhesive 13. Next, as shown in FIG. 4E, a layer of the adhesive 13 can be provided on the partition wall 4 by releasing the mold 11 from the rib material 15. In the example shown in FIGS. 4A to 4E, the partition wall 4 has an example of a triangle. However, the shape of the partition wall 4 is not limited to this, and may take other shapes such as a square. Can do.

  FIGS. 5A to 5D are views for explaining another example of the method of manufacturing the information display panel according to the present invention in the order of steps. In this example, first, as shown in FIG. 5A, an adhesive injection port 21 that communicates with the bottom of the partition wall forming cavity 12 of the mold 11 is provided in the mold 11. Next, as shown in FIG. 5B, the mold 11 is placed in a state where the surface of the mold 11 where the cavity 12 exists is opposed to the rib member 15 for forming the partition provided on the substrate 1 (2). The pressure toward the substrate 1 (2) is applied to 11, and the rib material 15 is filled in the cavity 12. The rib member 15 may be hardened at this point. Next, as shown in FIG. 5C, the adhesive 13 is injected into the bottom of the cavity 12 from the adhesive injection port 21, and only the top of the rib member 15 is filled with the adhesive 13. However, the adhesive 13 must be tack-free at this time. Further, the rib material 15 may basically be hardened so far by heat, UV or the like. Next, as shown in FIG. 5 (d), the layer of the adhesive 13 can be provided on the partition wall 4 by releasing the mold 11 from the rib material 15. In the examples shown in FIGS. 5A to 5D, the partition wall 4 has a triangular shape. However, the shape of the partition wall 4 is not limited to this, and other shapes such as a quadrangle are taken. Can do.

  In the example described above, when a reactive adhesive is used as the adhesive 13, the adhesive 13 is once heated with heat or UV depending on the material of the adhesive 13 at the same time as the rib material 15 before releasing the mold 11. It is assumed that it is semi-cured until tack-free and is fully cured with heat or UV when it is combined with the counter substrate 2 (1). However, this is not the case when a thermoplastic adhesive is used without using a reactive adhesive.

  Hereinafter, each member which comprises the information display panel of this invention is demonstrated.

  As for the substrate, at least one substrate is the transparent substrate 2 from which the color of the display medium 3 can be confirmed from the outside of the panel, and a material having high visible light transmittance and good heat resistance is preferable. The substrate 1 may be transparent or opaque. Examples of substrate materials include polymer sheets such as polyethylene terephthalate, polyethersulfone, polyethylene, polycarbonate, polyimide, and acrylic, flexible materials such as metal sheets, and flexible materials such as glass and quartz. There are no inorganic sheets. The thickness of the substrate is preferably from 2 to 5000 μm, more preferably from 5 to 2000 μm. If it is too thin, it will be difficult to maintain the strength and the spacing uniformity between the substrates, and if it is thicker than 5000 μm, it will be a thin information display panel. Is inconvenient.

  Electrode forming materials for electrodes provided on the substrate as necessary include metals such as aluminum, silver, nickel, copper, and gold, and conductive metal oxides such as ITO, indium oxide, conductive tin oxide, and conductive zinc oxide , Conductive polymers such as polyaniline, polypyrrole, polythiophene and the like are exemplified, and are appropriately selected and used. As a method for forming an electrode, a method of forming the above-described materials into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or mixing a conductive agent with a solvent or a synthetic resin binder. A method of applying is used. The electrode provided on the viewing side substrate needs to be transparent, but the electrode provided on the back side substrate does not need to be transparent. In any case, the above-mentioned material that is conductive and capable of pattern formation can be suitably used. Note that the electrode thickness is not particularly limited as long as the conductivity can be secured and the light transmittance is not hindered, and is preferably 3 to 1000 nm, preferably 5 to 400 nm. The material and thickness of the electrode provided on the back side substrate are the same as those of the electrode provided on the viewing side substrate described above, but need not be transparent. In this case, the external voltage input may be superimposed with direct current or alternating current.

  If the partition 4 is manufactured according to the above-described manufacturing method of the present invention, the shape is appropriately set appropriately depending on the type of display medium involved in the display, and is not limited in general, but the width of the partition is 2 to 100 μm, Preferably, the height of the partition wall is adjusted to 3 to 50 μm, and the height of the partition wall is adjusted to 10 to 500 μm, preferably 10 to 200 μm. As shown in FIG. 6, the display cell formed by the partition walls made of these ribs is exemplified by a square shape, a triangular shape, a line shape, a circular shape, and a hexagonal shape as viewed from the plane of the substrate. The shape and the mesh shape are exemplified. It is better to make the portion corresponding to the cross section of the partition wall visible from the display side (the area of the frame portion of the display cell) as small as possible, and the display becomes clearer.

  Next, the powder fluid used as a display medium in the information display panel of the present invention will be described. As for the name of the powder fluid as the display medium of the present invention, the present applicant has obtained the right of “Electronic Powder Fluid (registered trademark): Registration No. 4636931”.

  The “powder fluid” in the present invention is a substance in an intermediate state of both fluid and particle characteristics that exhibits fluidity by itself without borrowing the force of gas or liquid. For example, liquid crystal is defined as an intermediate phase between a liquid and a solid, and has fluidity that is a characteristic of liquid and anisotropy (optical properties) that is a characteristic of solid (Heibonsha: Encyclopedia) . On the other hand, the definition of particle is an object with a finite mass even if it is negligible, and is said to be affected by gravity (Maruzen: Physics Encyclopedia). Here, even in the case of particles, there are special states of gas-solid fluidized bed and liquid-solid fluids. When gas is flowed from the bottom plate to the particles, upward force is applied to the particles according to the velocity of the gas. Is a gas-solid fluidized bed that is in a state where it can easily flow when it balances with gravity, and it is also called a liquid-solid fluidized state that is fluidized by a fluid (ordinary) Company: Encyclopedia). As described above, the gas-solid fluidized bed body and the liquid-solid fluid are in a state of using a gas or liquid flow. In the present invention, it has been found that a substance in a state of fluidity can be produced specifically without borrowing the force of such gas and liquid, and this is defined as powder fluid.

  That is, the pulverulent fluid in the present invention is in an intermediate state having both the characteristics of particles and liquid, as in the definition of liquid crystal (liquid and solid intermediate phase), and is the characteristic of the above-mentioned particles. It is a substance that is extremely unaffected and exhibits a unique state with high fluidity. Such a substance can be obtained in an aerosol state, that is, in a dispersion system in which a solid or liquid substance is stably suspended as a dispersoid in a gas, and the solid substance is regarded as a dispersoid in the information display panel of the present invention. To do.

The information display panel of the present invention encloses a powder fluid that exhibits high fluidity in an aerosol state in which solid particles are stably suspended as a dispersoid, for example, as a display medium, between opposing substrates, at least one of which is transparent. Such a powder fluid can be easily and stably moved by a Coulomb force or the like by applying a low voltage.
As described above, for example, the powder fluid used as the display medium in the present invention is a substance in the intermediate state between the fluid and particles that exhibits fluidity by itself without borrowing the force of gas or liquid. It is. This powder fluid can be in an aerosol state in particular, and in the information display panel of the present invention, a solid substance is used in a state of relatively stably floating as a dispersoid in the gas.

Next, display medium particles (hereinafter also referred to as particles) constituting the display medium in the information display panel of the present invention will be described. The display medium particles are composed of the display medium particles as they are to form a display medium, or are combined with other particles to form a display medium, or adjusted and configured to become a powder fluid to form a display medium. Or used.
The particles can contain a charge control agent, a colorant, an inorganic additive, and the like, if necessary, in the resin as the main component, as in the conventional case. Examples of resins, charge control agents, colorants, and other additives will be given below.

  Examples of the resin include urethane resin, urea resin, acrylic resin, polyester resin, acrylic urethane resin, acrylic urethane silicone resin, acrylic urethane fluororesin, acrylic fluororesin, silicone resin, acrylic silicone resin, epoxy resin, polystyrene resin, styrene Acrylic resin, polyolefin resin, butyral resin, vinylidene chloride resin, melamine resin, phenol resin, fluororesin, polycarbonate resin, polysulfone resin, polyether resin, polyamide resin and the like can be mentioned, and two or more kinds can be mixed. In particular, acrylic urethane resin, acrylic silicone resin, acrylic fluororesin, acrylic urethane silicone resin, acrylic urethane fluororesin, fluororesin, and silicone resin are suitable from the viewpoint of controlling the adhesive force with the substrate.

  The charge control agent is not particularly limited. Examples of the negative charge control agent include salicylic acid metal complexes, metal-containing azo dyes, metal-containing oil-soluble dyes (including metal ions and metal atoms), and quaternary ammonium salt systems. Examples thereof include compounds, calixarene compounds, boron-containing compounds (benzyl acid boron complexes), and nitroimidazole derivatives. Examples of the positive charge control agent include nigrosine dyes, triphenylmethane compounds, quaternary ammonium salt compounds, polyamine resins, imidazole derivatives, and the like. In addition, metal oxides such as ultrafine silica, ultrafine titanium oxide, ultrafine alumina, nitrogen-containing cyclic compounds such as pyridine and derivatives and salts thereof, various organic pigments, resins containing fluorine, chlorine, nitrogen, etc. are also charged. It can also be used as a control agent.

  As the colorant, various organic or inorganic pigments and dyes as exemplified below can be used.

Examples of the black colorant include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon and the like.
Examples of blue colorants include C.I. I. Pigment blue 15: 3, C.I. I. Pigment Blue 15, Bituminous Blue, Cobalt Blue, Alkaline Blue Lake, Victoria Blue Lake, Phthalocyanine Blue, Metal-free Phthalocyanine Blue, Phthalocyanine Blue Partial Chlorides, Fast Sky Blue, Indanthrene Blue BC, and the like.
Examples of red colorants include bengara, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, risor red, pyrazolone red, watching red, calcium salt, lake red D, brilliant carmine 6B, eosin lake, rhodamine lake B, Alizarin Lake, Brilliant Carmine 3B, C.I. I. Pigment Red 2 etc.

Yellow colorants include yellow lead, zinc yellow, cadmium yellow, yellow iron oxide, mineral first yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa Yellow G, Hansa Yellow 10G, Benzidine Yellow G, Benzidine Yellow GR, Quinoline Yellow Lake, Permanent Yellow NCG, Tartrazine Lake, C.I. I. Pigment Yellow 12 etc.
Examples of green colorants include chrome green, chromium oxide, pigment green B, C.I. I. Pigment Green 7, Malachite Green Lake, Final Yellow Green G, etc.
Examples of the orange colorant include red chrome yellow, molybdenum orange, permanent orange GTR, pyrazolone orange, Vulcan orange, indanthrene brilliant orange RK, benzidine orange G, indanthrene brilliant orange GK, C.I. I. Pigment Orange 31 etc.
Examples of purple colorants include manganese purple, first violet B, and methyl violet lake.
Examples of white colorants include zinc white, titanium oxide, antimony white, and zinc sulfide.

  Examples of extender pigments include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white. Examples of various dyes such as basic, acidic, disperse, and direct dyes include nigrosine, methylene blue, rose bengal, quinoline yellow, and ultramarine blue.

Examples of inorganic additives include titanium oxide, zinc white, zinc sulfide, antimony oxide, calcium carbonate, lead white, talc, silica, calcium silicate, alumina white, cadmium yellow, cadmium red, cadmium orange, titanium yellow, Examples include bitumen, ultramarine blue, cobalt blue, cobalt green, cobalt violet, iron oxide, carbon black, manganese ferrite black, cobalt ferrite black, copper powder, and aluminum powder.
These pigments and inorganic additives can be used alone or in combination. Of these, carbon black is particularly preferable as the black pigment, and titanium oxide is preferable as the white pigment.

  The particles used in the present invention preferably have an average particle diameter d (0.5) in the range of 0.1 to 20 μm and are uniform and uniform. If the average particle diameter d (0.5) is larger than this range, the display is not clear, and if it is smaller than this range, the cohesive force between the particles becomes too large, which hinders the movement of the particles.

Furthermore, in the present invention, regarding the particle size distribution of each particle, the particle size distribution Span represented by the following formula is less than 5, preferably less than 3.
Span = (d (0.9) −d (0.1)) / d (0.5)
(However, d (0.5) is a numerical value expressing the particle diameter in μm that 50% of the particles are larger than this and 50% is smaller than this, and d (0.1) is a particle in which the ratio of the smaller particles is 10%. (Numerical value expressed in μm, and d (0.9) is a numerical value expressed in μm for a particle diameter of 90% or less.)
By keeping Span within a range of 5 or less, the size of each particle is uniform, and uniform particle movement becomes possible.

  Furthermore, regarding the correlation between the particles, the ratio of d (0.5) of the particles having the minimum diameter to d (0.5) of the particles having the maximum diameter among the used particles is set to 50 or less, preferably 10 or less. It is essential. Even if the particle size distribution Span is reduced, particles with different charging characteristics move in opposite directions, so that the particle size is close to each other and each particle can be easily moved in the opposite direction by the equivalent amount. This is within this range.

The particle size distribution and the particle size can be obtained from a laser diffraction / scattering method or the like. When laser light is irradiated onto particles to be measured, a light intensity distribution pattern of diffracted / scattered light is spatially generated, and this light intensity pattern has a corresponding relationship with the particle diameter, so that the particle diameter and particle diameter distribution can be measured. .
Here, the particle size and particle size distribution in the present invention are obtained from a volume-based distribution. Specifically, using a Mastersizer2000 (Malvern Instruments Ltd.) measuring instrument, particles are introduced into a nitrogen stream, and the attached analysis software (software based on volume-based distribution using Mie theory) The diameter and particle size distribution can be measured.

  The charge amount of the particles used for the display medium naturally depends on the measurement conditions, but the charge amount of the particles used for the display medium in the information display panel is almost the initial charge amount, the contact with the partition, the contact with the substrate, the elapsed time. It was found that the saturation value of the charging behavior of the particles used in the display medium is a governing factor, depending on the charge decay associated with.

  As a result of intensive studies, the present inventors evaluated the range of the appropriate charging characteristic value of the particles used in the display medium by measuring the charge amount of the particles used in the display medium using the same carrier particles in the blow-off method. I found out that I can do it.

Furthermore, in the present invention, it is important to manage the gas in the void surrounding the display medium between the substrates, which contributes to improved display stability. Specifically, it is important that the relative humidity at 25 ° C. is 60% RH or less, preferably 50% RH or less, more preferably 35% RH or less with respect to the humidity of the gas in the gap.
1 to 3, the gap between the opposing substrate 1 and substrate 2 in FIGS. 1 to 3, the occupied portion of the electrodes 5 and 6, the display medium (particle group or powder fluid) 3, and the occupied portion of the partition wall 4. In addition, a gas portion in contact with a so-called display medium excluding a seal portion of the information display panel is indicated.
The gas in the gap is not limited as long as it is in the humidity region described above, but dry air, dry nitrogen, dry argon, dry helium, dry carbon dioxide, dry methane, and the like are preferable. This gas needs to be sealed in an information display panel so that the humidity is maintained, for example, filling a display medium, assembling an information display panel, etc. in a predetermined humidity environment, It is important to apply a sealing material and a sealing method that prevent moisture from entering from the outside.

The distance between the substrates in the information display panel of the present invention is not limited as long as the display medium can be moved and the contrast can be maintained, but is usually adjusted to 10 to 500 μm, preferably 10 to 200 μm.
The volume occupation ratio of the display medium in the space between the opposing substrates is preferably 5 to 70%, more preferably 5 to 60%. When it exceeds 70%, the movement of the display medium is hindered, and when it is less than 5%, the contrast tends to be unclear.

  The information display panel according to the present invention includes display units for mobile devices such as notebook computers, PDAs, mobile phones, and handy terminals, electronic papers such as electronic books and electronic newspapers, bulletin boards such as signboards, posters, and blackboards, calculators, and home appliances. It is suitably used for display parts for automobile supplies, card display parts such as point cards and IC cards, electronic advertisements, electronic POPs, electronic price tags, electronic shelf labels, electronic musical scores, and display parts for RF-ID devices.

It is a figure which shows an example of the information display panel of this invention. It is a figure which shows the other example of the information display panel of this invention. It is a figure which shows the further another example of the information display panel of this invention. (A)-(e) is a figure for demonstrating an example of the manufacturing method of the information display panel of this invention in order of a process. (A)-(d) is a figure for demonstrating the other example of the manufacturing method of the information display panel of this invention in order of a process, respectively. It is a figure which shows an example of the shape of the partition in the information display panel of this invention.

Explanation of symbols

1, 2 Substrate 3 Display medium (particle group or powder fluid)
3W white particles (white powder fluid)
3B Black particle group (black powder fluid)
4 Partition 5 and 6 Electrode 11 Mold 12 Cavity 13 Adhesive 14 Squeegee 15 Rib Material 21 Adhesive Injection Port

Claims (4)

An information display panel for displaying information by moving a display medium by enclosing the display medium in a cell defined by a partition wall between two substrates, at least one of which is transparent, and applying an electric field to the display medium In the manufacturing method of
In forming the partition walls on the substrate, an adhesive is pre-applied to the cavity for forming the partition wall of the mold, the mold and the rib material for partition wall formation are combined, and pressure is applied to the mold to rib the cavity By filling the material and releasing the mold from the rib material, an adhesive layer is provided on the partition wall, whereby the partition wall provided with the adhesive layer at the tip is formed by mold transfer. Manufacturing method of information display panel. An information display panel for displaying information by moving a display medium by enclosing the display medium in a cell defined by a partition wall between two substrates, at least one of which is transparent, and applying an electric field to the display medium In the manufacturing method of
In forming the partition wall on the substrate, the mold is provided with an adhesive inlet that communicates with the bottom of the cavity facing the opening on the side where the rib material is filled in the cavity for forming the partition wall of the mold. Combined with the rib material for forming the partition wall, pressure is applied to the mold to fill the cavity with the rib material, and the adhesive is injected from the adhesive inlet to the bottom of the cavity, and the rib material provided on the substrate By filling the adhesive only on the top of the head and releasing the mold from the rib material, an adhesive layer is provided on the partition, thereby forming a partition with the adhesive layer on the tip by mold transfer. A method of manufacturing an information display panel characterized by 2. The method according to claim 1 , wherein when a reactive adhesive is used as an adhesive constituting the adhesive layer, the adhesive layer is semi-cured and tack-free when releasing the mold from the rib member. Manufacturing method of information display panel. An information display panel manufactured according to the method for manufacturing an information display panel according to claim 1 .

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