JP5102988B2 - Manufacturing method of information display panel - Google Patents

Description

  The present invention provides at least one or more kinds of optical reflectance and chargeability composed of at least one kind of particles in a cell formed by a partition between two opposing substrates, at least one of which is transparent. The present invention relates to a method for manufacturing an information display panel that encloses a display medium and applies an electric field to the display medium to move the display medium to display information such as an image.

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

  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. Furthermore, since particles with high specific gravity such as titanium oxide are dispersed in a solution with low specific gravity, it is easy to settle, it is difficult to maintain the stability of the dispersed state, and the stability of repeated rewriting of information display is lacking. Have 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 a method for solving the various problems described above, an optical reflectance composed of at least one kind of particles in a cell formed by a partition between two opposing substrates, at least one of which is transparent. In addition, an information display panel that displays information such as an image by moving the display medium by enclosing at least one display medium having charging properties and applying an electric field to the display medium is known.

As a method for manufacturing the above-described information display panel, a method using a mask has been proposed. On the information display panel substrate, a conductive mask is disposed on the unnecessary portion of the display medium with a dummy spacer interposed therebetween, and a predetermined amount of the display medium is sprayed from above the substrate and the mask by spraying the display medium. The display medium is filled into the substrate. The mask used here has a shape larger than that of the substrate (for example, Patent Document 1).
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 JP 2005-258240 A

  In the above-described method for manufacturing an information display panel using a mask, if the mask is thin (about 0.05 to 0.4 mm), the mask is bent and the mask is not uniformly adhered to the substrate. For this reason, the display medium wraps around to an unnecessary filling portion. In addition, there is a problem that positioning in the case of repeated use after being removed is unclear and poor repeatability.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing an information display panel that solves the above-described problems, fills only a necessary portion with a display medium, can repeatedly use the mask stably, and is easy to mount. .

The method for producing an information display panel according to the present invention comprises an optical reflectivity and charging composed of at least one kind of particles in a cell formed by a partition wall between two opposing substrates, at least one of which is transparent. A mask is used in a method for manufacturing an information display panel that displays information such as images by enclosing at least one type of display medium having a property and applying an electric field to the display medium to move the display medium to, when filling the display media in the cell from above the mask, applying a tension to the mask using a frame, a mask guide provided on the support portion of the device which are arranged an information display panel substrate, to the frame the mask was placed and disposed on the mask guide, mounting the mask X / Y-direction adjusting screws for positioning between the mask guide and the device to the device, X / Y-direction adjusting The position adjustment between the mask and the information display panel substrate is performed with a screw, and the mask and the information display panel substrate are brought into close contact with each other.
In the method for producing an information display panel of the present invention, an optical reflectance composed of at least one kind of particles in a cell formed by a partition wall between two opposing substrates , at least one of which is transparent. In a method of manufacturing an information display panel that encloses at least one type of display medium having a charging property and chargeability and applies an electric field to the display medium to display information such as an image by moving the display medium. When the display medium is filled into the cell from above the mask, the mask is mounted in an apparatus in which the information display panel substrate is arranged, and the tension of the mask is longitudinally adjusted using a longitudinal adjustment screw. At the same time, the position of the mask and the information display panel substrate is adjusted in the longitudinal direction, and the position of the mask and the information display panel substrate is adjusted. Is characterized in that the adhering the said mask and the information display panel substrate.

  According to the present invention, at least one having at least one optical reflectivity and chargeability composed of at least one kind of particles in a cell formed by a partition wall between two opposing substrates, at least one of which is transparent. In a method for manufacturing an information display panel that displays information such as images by enclosing a display medium of more than one type and applying an electric field to the display medium, the display medium is filled using a mask. In doing so, a certain tension is applied to the mask using the frame, a mask guide is provided at the support location of the device on which the information display panel substrate is placed, the mask placed in the frame is placed on the mask guide, and the X / Y direction is adjusted. By adjusting the position of the mask and the information display panel substrate with screws, the display medium is filled only in the necessary parts, the mounting work is easy, the position can be easily reproduced, and the mask is removed. Ri stable method of manufacturing the information display panel that can be used return can be provided.

  First, a basic configuration of a display panel that is an object of the present invention will be described. In the display panel which is an object of the present invention, an electric field is applied to a display medium having optical reflectivity and chargeability sealed between two opposing substrates. In accordance with the applied electric field direction, the charged display medium is attracted by the electric field force or the Coulomb force, and the display medium changes the moving direction according to the change of the electric field direction, thereby displaying information such as an image. Therefore, it is necessary to design the display panel so that the display medium can move uniformly and maintain stability when rewriting the display repeatedly or when displaying the display information continuously. Here, as the force applied to the particles constituting the display medium, in addition to the force attracting each other by the Coulomb force between the particles, an electric mirror image force between the electrode and the substrate, an intermolecular force, a liquid cross-linking force, gravity and the like can be considered.

  An example of a display panel that is an object of the present invention will be described with reference to FIGS.

  In the example shown in FIG. 1, at least two or more types of display media 3 (here, white display media consisting of particles of display white particles 3Wa) having different optical reflectivity and charging characteristics composed of at least one type of particles. 3W and a black display medium 3B composed of a group of black particles 3Ba for display) are moved vertically to the substrates 1 and 2 in accordance with the electric field applied from the outside of the substrates 1 and 2, and the black display medium 3B is moved. The observer visually recognizes and displays black, or the white display medium 3W is visually recognized by the observer and displays white. A cell is formed by providing partition walls 4 between the substrates 1 and 2, for example, in a lattice pattern, and the partition walls in front are omitted.

  In the example shown in FIGS. 2A and 2B, at least two or more types of display media 3 (here, display white particles 3Wa) having different optical reflectance and charging characteristics composed of at least one type of particles are used. Between the electrodes 5 and 5L provided on the substrate 1 and the electrodes 6 and 6L provided on the substrate 2), a white display medium 3W composed of particles and a black display medium 3B composed of particles of display black particles 3Ba are shown. Depending on the electric field generated by applying a voltage to the substrate, the substrate is moved perpendicularly to the substrates 1 and 2 so that the black display medium 3B is visually recognized by the observer and black display is performed, or the white display medium 3W is observed. A white display is given to the user. In addition, for example, a cell is formed by providing partition walls 4 between the substrates 1 and 2 in the form of a lattice, and line electrodes are arranged in FIG. 2A and individual electrodes are arranged in FIG. 2B. Show. The partition in front is omitted. The electrode may be provided outside the substrate or may be provided so as to be embedded inside the substrate.

  In the example shown in FIG. 3, the substrate 1 is provided with a display medium 3 (in this case, a white display medium 3 </ b> W consisting of a group of particles) having at least an optical reflectance and chargeability composed of at least one kind of particles. In response to the electric field generated by applying a voltage between the electrode 5 and the electrode 6, the substrate 5 is moved in a direction parallel to the substrates 1 and 2, and the white display medium 3W is visually recognized by the observer to display white. Alternatively, the color of the electrode 6 or the substrate 1 is displayed by making an observer visually recognize the color of the electrode 6 or the substrate 1. For example, a grid-like partition 4 is provided between the substrates 1 and 2 to form a display cell, and the partition in front is omitted. The electrode may be provided outside the substrate or may be provided so as to be embedded inside the substrate.

  The above description applies in the same manner to the case where the white display medium 3W including the particle group is replaced with the white medium including the powder fluid and the black display medium 3B including the particle group is replaced with the black display medium including the powder fluid. I can do it.

FIG. 4 is a diagram showing an example of a method for manufacturing an information display panel according to the present invention. The mask 11 is fixed to the movable plate 12 with a mask fixing screw 13. By turning the adjusting screw 14, the movable plate 12 is moved in the longitudinal direction. When the adjustment screw 14 is turned in the tightening direction, the tip of the adjustment screw 14 pushes the base plate 24 on the support base 23, and the movable plate 12 that faces is separated, so that a uniform tension (arrow in the figure) is applied to the mask 11 in the longitudinal direction. Join. The panel substrate 20 is placed on the substrate stage 21 on the stage lifting device 22. The stage lifting device 22 is adjusted to align the panel substrate 20 and the mask 11. At this time, since the tension is applied to the mask 11, the mask 11 and the panel substrate 20 are in close contact with each other, and the display medium does not wrap around the unnecessary portion.
As the mask, a metal mask is used in this example, and it is preferable that the mask has excellent durability and conductivity, and SUS304 is particularly preferable. Moreover, 0.05-0.4 mm is suitable for the thickness of a mask.
However, with this method, tension may be applied only in the longitudinal direction, and a uniform tension may not be applied to the mask. In addition, it is necessary to adjust the position in the longitudinal direction at the same time as applying tension to the mask 11 with the adjusting screw 14, which may make attachment difficult. An example in which this is improved is shown in FIG. Here, a metal mask is used as the mask material.

FIG. 5 is a diagram showing another example of the method for manufacturing the information display panel of the present invention. The mask 11 is affixed with the adhesive tape 15 so that a uniform tension is applied to the four sides of the frame 16, and the mask 11 is evenly tensioned in the longitudinal direction and the lateral direction in the state of being affixed to the frame 16 (in the figure). Arrow). In FIG. 5, the mask is fixed to the frame using the adhesive tape 15. However, if a uniform tension is applied to the four sides of the frame 16, adjustment screws are attached as shown in FIG. 4. A uniform tension may be applied to the mask by expanding the frame. This method is effective even in a mask having many openings because tension is uniformly applied in the longitudinal direction and the transverse direction. The frame may be steel, but light aluminum is better.
By providing a mask guide at a support location on the base plate 24 and fixing the mask contained in the frame to the mask guide, attachment becomes easy, and positioning during repeated use is also facilitated. As a method for fixing the mask placed in the frame, a screw may be used or a clamp may be used. Further, an X / Y direction adjusting screw is attached on the base plate 24, and the mask placed in the frame can be positioned in the X and Y directions, and tensioning and positioning can be performed independently, so that positioning becomes easy.

  Hereinafter, each member which comprises the information display panel used as the object 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 can be confirmed from the outside of the information display 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, polyethylene naphthalate, polyethersulfone, polyethylene, polycarbonate, polyimide, and acrylic, flexible materials such as metal sheets, and glass and quartz. An inorganic sheet having no flexibility is mentioned. 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.

  As an electrode forming material for providing an electrode on an information display panel, metals such as aluminum, silver, nickel, copper, gold, indium tin oxide (ITO), indium oxide, conductive tin oxide, antimony tin oxide ( ATO), conductive metal oxides such as conductive zinc oxide, and conductive polymers such as polyaniline, polypyrrole, and polythiophene are exemplified and used as appropriate. 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. The method of apply | coating is used. The electrode provided on the display surface side substrate 2 which is on the viewing side and needs to be transparent needs to be transparent, but the electrode provided on the back side substrate 1 does not need to be transparent. In any case, the above-mentioned material that can be patterned and is electrically conductive 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 1 are the same as those of the electrode provided on the display surface 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.

  The height and width of the partition provided on the substrate are appropriately set according to the type of display medium involved in display, and are not generally limited. However, the partition width is 2 to 100 μm, preferably 3 to 50 μm, and the height of the partition is 10 It is adjusted to ˜500 μm, preferably 10 to 200 μm. The cell shape in the information display panel obtained by superimposing the display side substrate and the back side substrate may be various shapes depending on the partition shape. It is better to make the portion corresponding to the partition cross section visible from the display surface side (the area of the cell frame formed by the partition width) as small as possible, and the display state becomes clearer.

  Next, the powder fluid used as a display medium in the information display panel that is the subject of the present invention will be described. As for the name of the powder fluid used in the information display panel that is the subject 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, a dispersion system in which a solid or liquid substance is stably suspended as a dispersoid in a gas, and the solid substance can be obtained from the information display panel of the present invention. Dispersed.

The information display panel to which the present invention is applied encloses a powder fluid exhibiting high fluidity in an aerosol state in which solid particles are stably suspended as dispersoids in a gas, for example, between opposing substrates at least one of which is transparent Such a pulverulent fluid exhibits a state that is so fluid that it does not form an angle of repose, which is an index indicating the fluidity of the powder, and an electric field formed by application of a low voltage or the like. It can be easily and stably moved by Coulomb force.
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 that is the object of the present invention, a display medium that can easily create a state in which a solid substance floats relatively stably as a dispersoid in a gas. Used as

Next, display particles (hereinafter also referred to as particles) constituting the display medium in the information display panel that is the subject of the present invention will be described. The display particles may be composed of the display particles as they are to form a display medium, or may be combined with other particles to form a display medium, or may be adjusted and configured to become a powder fluid to form a display medium. 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, resol 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.

As yellow colorants, 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 yellow lead, molybdenum orange, permanent orange GTR, pyrazolone orange, Vulcan orange, Indanthrene Brilliant Orange RK, Benzidine Orange G, Indanthren 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.

As extender pigments, barite powder, barium carbonate, clay, silica, white carbon,
There are 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 display agent of a desired color can be produced by blending the colorant.

  The particles used in the present invention preferably have an average particle diameter d (0.5) in the range of 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. If the average particle diameter d (0.5) is smaller than this range, the cohesive force between the particles becomes too large, which hinders movement as a display medium.

Further, in the display particles used in the present invention, the particle size distribution Span represented by the following formula is set to less than 5, preferably less than 3, with respect to the particle size distribution.
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 movement as a display medium is possible.

  Furthermore, regarding the correlation between the display 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 50 or less, preferably 10 or less. It is important. 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 display particles naturally depends on the measurement conditions, but the charge amount of the display particles in the information display panel is almost the initial charge amount, the contact with the partition wall, the contact with the substrate, and the charge decay with the elapsed time. It was found that the saturation value of the charging behavior of the display particles is a dominant factor.

  As a result of intensive studies, the present inventors have found that by using the same carrier particles in the blow-off method and measuring the charge amount of the display particles, it is possible to evaluate the range of the appropriate charging characteristic value of the display particles. .

Furthermore, when the information display panel manufactured in the present invention is used as a dry information display panel for driving a display medium in an air space, it is important to manage the gas in the void surrounding the display medium. Contributes to improved stability. Specifically, it is important that the relative humidity at 25 ° C. is 60% RH or less, and preferably 50% RH or less for the humidity of the gas in the gap.
1 to 3, electrodes 5 and 6 (when electrodes are provided inside the substrate), display medium 3 (particle group or powder fluid) from the portion sandwiched between opposing substrates 1 and 2 in FIGS. ), The occupied portion of the partition wall 4, and the seal portion of the information display panel, the gas portion in contact with the so-called display medium 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 that is the subject 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.
In the case of a dry information display panel, the volume occupancy of the display medium in the space between the opposing substrates is preferably 5 to 70%, more preferably 5 to 60%. If it exceeds 70%, the movement of the display medium is hindered, and if it is less than 5%, the contrast tends to be unclear.

  An information display panel according to the present invention includes a notebook computer, an electronic notebook, a portable information device called PDA (Personal Digital Assistants), a display unit of a mobile device such as a mobile phone and a handy terminal, an electronic book such as an electronic book and an electronic newspaper. Paper, signboards, posters, bulletin boards such as blackboards (whiteboards), electronic desk calculators, home appliances, automotive display units, point cards, IC card display units, electronic advertisements, information boards, electronic POPs (Points) Of Presence, Point Of Purchase advertising), electronic price tag, electronic shelf label, electronic score, display unit of RF-ID device, as well as display unit of various electronic devices such as POS terminal, car navigation device, clock, etc. .

  The information display panel driving method according to the present invention includes a simple matrix driving display panel, a static driving display panel that does not use a switching element in the panel itself, and three thin film transistors (TFTs). Various types of information display panels such as an active matrix drive type display panel using a two-terminal switching element represented by a terminal switching element or a thin film diode (TFD) can be used.

It is a figure which shows an example of the information display panel used as the object of this invention. (A), (b) is a figure which shows the other example of the information display panel used as the object of this invention, respectively. It is a figure which shows the further another example of the information display panel of this invention. It is a figure for demonstrating an example of the manufacturing method of the information display panel of this invention. It is a figure for demonstrating another example of the manufacturing method of the information display panel of this invention.

Explanation of symbols

1, 2 Substrate 3 Display medium 3W White display medium 3Wa White particles for display 3B Black display medium 3Ba Black particles for display 4 Bulkhead 5, 6 Electrode (individual electrode)
5L, 6L Line electrode 11 Mask 12 Movable plate 13 Mask fixing screw 14 Adjustment screw 15 Adhesive tape 16 Frame 20 Panel substrate 21 Substrate stage 22 Stage lifting device 23 Support base 24 Base plate

Claims (2)

At least one type of display medium having optical reflectivity and chargeability composed of at least one type of particles in a cell formed by a partition between two opposing substrates, at least one of which is transparent. In the manufacturing method of the information display panel that displays information such as an image by moving the display medium by enclosing and applying an electric field to the display medium,
In filling the display medium into the cell from above the mask using a mask, a tension is applied to the mask using a frame, and a mask guide is provided at a support location of the apparatus on which the information display panel substrate is disposed, The mask placed in the frame is arranged on the mask guide, and an X / Y direction adjustment screw of the mask for positioning the mask guide and the apparatus is attached to the apparatus, and the mask is adjusted with the X / Y direction adjustment screw. The information display panel manufacturing method is characterized in that the position of the information display panel substrate is adjusted and the mask and the information display panel substrate are brought into close contact with each other. At least one type of display medium having optical reflectivity and chargeability composed of at least one type of particles in a cell formed by a partition between two opposing substrates, at least one of which is transparent. In the manufacturing method of the information display panel that displays information such as an image by moving the display medium by enclosing and applying an electric field to the display medium,
In filling the display medium into the cell from above the mask using the mask, the mask is attached to an apparatus in which the information display panel substrate is arranged, and the tension of the mask is adjusted using a longitudinal adjustment screw. Simultaneously adjusting in the longitudinal direction, the position of the mask and the information display panel substrate is adjusted in the longitudinal direction, the position of the mask and the information display panel substrate is adjusted, and the mask, the information display panel substrate, A method for manufacturing an information display panel, wherein

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