JP2006235296A - Picture-story board set using reversible information display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a picture-story board set using a reversible information display panel that can suppress the manufacturing cost and man-hour of a picture-story board low and also effectively suppress the power consumption. <P>SOLUTION: Disclosed is the picture-story board set 1 which comprises a reversible and dry type information display panel 2 which has display media charged in the sealed space between two mutually opposite transparent substrates one of which is transparent and moves the display media with an electric field to display necessary information on the transparent substrate side, a picture-story board box 3 having a rewriting means of rewriting the information displayed on the information display panel, and a picture-story board software 4 controlling the rewriting means, the picture-story board set being characterized in that (1) two kinds of display media having different colors and electrostatic charging characteristics are used, (2) the mean particle size of particles for the display media constituting the display media is 3 to 10 μm, and (3) the overall thickness of the information display panel is 10 μm to 1 mm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention encloses a display medium in a sealed space between two substrates facing each other and at least one of which is transparent, and moves the display medium by an electric field so that necessary information is transferred to the transparent substrate side. Is a picture-story show set using a reversible information display panel.

  Conventional picture-story shows are performed by presenting multiple images of the main part of the performance in advance on a paper or plastic board in a frame-like base, and the reader sequentially explains the scene. . In recent years, there is also known an electronic picture-story show in which still images are sequentially displayed on a display such as a TV without using an image such as paper or a plastic board, and a reader explains the scene in the same manner as the picture-story show described above.

  However, in the traditional picture-story show using paper or plastic boards displaying images for each scene, it was necessary to prepare several still images for each scene and bring them to the venue. On the other hand, in the electronic picture-story show, it is not necessary to prepare several still images, but the problem is that the display for displaying the image becomes larger, the portability becomes poor, and the atmosphere of the traditional picture-story show cannot be given. If the power is not kept energized, there is a problem that display cannot be performed and power consumption increases.

On the other hand, as an information display panel capable of repeatedly displaying information such as an image, the present applicant encloses a display medium in a space between two substrates, at least one of which is transparent. A reversible information display panel that can be moved in an electric field to display necessary information on the transparent substrate side has been proposed (see, for example, Patent Document 1). This information display panel moves the display medium based on the electric field formed in the substrate or based on the formation of charges such as an electrostatic latent image on the substrate, and the display medium particles constituting the display medium Even if there is no electric field between the substrates due to Coulomb force, electrical image power with the electrode, intermolecular force, liquid bridge force, gravity, etc., the display information can be maintained over a long period of time and can exhibit excellent display preservation. Has advantages. Therefore, after displaying necessary information such as figures, symbols, images, etc. on the transparent substrate for a long period of time, it can be easily erased and rewritten, and can be used repeatedly, so the display content is rewritten for each scene described above. There is a possibility of being suitably used for picture-story shows.
JP 2004-341123 A

  However, when the conventional information display panel is used for a picture-story show, there is a problem in that clear information display cannot be performed, and display information cannot be surely erased or rewritten, and the present invention is left as it is. It was not possible to use it for the picture-story show.

  The object of the present invention is to solve the above-mentioned problems, reduce the production cost and man-hour of the picture-story show sufficiently low, and can reduce power consumption effectively, and is lightweight, reversible and excellent in portability. It is intended to provide a picture-story show set using a formula information display panel.

  The picture-story show set using the reversible information display panel of the present invention encloses two types of display media in a sealed space between two substrates facing each other and at least one of which is transparent. The display medium is moved by an electric field to display required information on the transparent substrate side, a reversible information display panel, a picture-story show box having rewriting means for rewriting information displayed on the information display panel, and the rewriting means are controlled. (1) Two types of display media having different colors and charging characteristics are used, and (2) Two types of display medium particles constituting two types of display media used in an information display panel. The average particle diameter is 3 to 10 μm, and (3) the total thickness of the information display panel is 10 μm or more and less than 1 mm.

  Here, preferably, the thickness of at least one of the two substrates is 0.4 mm or less, and the distance between the substrates formed by the two substrates facing each other is 0.1 mm or less. Preferably, each substrate is made of a plastic material. More preferably, a particle group or a powder fluid is used as the display medium. In addition, it is preferable to provide electrodes for applying an electric field to the display medium on the front and back of a picture-story show box in which a reversible information display panel is mounted and the front of the picture-story show is made of a transparent plate.

  In the picture-story show set using the reversible information display panel of the present invention, first, the clear information display that the conventional information display panel has cannot be performed, or the display information cannot be erased and rewritten reliably. (1) Two types of display media having different colors and charging characteristics are used. (2) The average particle diameter of the display medium particles constituting the display medium is in the range of 3 to 10 μm. 3) This is solved by setting the total thickness of the information display panel to 10 μm or more and less than 1 mm. Thereby, means for applying an electric field to the information display panel, for example, charge forming means capable of forming charges on the information display panel substrate (for example, means for forming charges as an electrostatic latent image by a photoconductor or means for forming charges by ion flow) If the electrode pair is arranged outside the substrate of the information display panel and a voltage is applied between the electrodes, the display information can be rewritten with certainty. Therefore, in the picture-story show set using the reversible information display panel having the above-described configuration, once the displayed information is securely erased, new information can be displayed any number of times with one panel. It is not necessary to perform predetermined printing or the like on the paper, and the cost and the man-hours for the printing can be greatly suppressed, and the portability can be excellent with sufficiently reduced power consumption.

  By the way, in the information display panel used for the picture-story show set of the present invention, making each substrate made of a plastic material not only makes the panel sufficiently thin and light, but also makes the picture-story show set of the present invention. This is also an effective method for securely erasing necessary displayed information and then displaying new information clearly.

  Therefore, according to the picture-story show set of the present invention, it is not necessary to perform predetermined printing on a large number of sheets, and the production cost of the picture-story show and the work man-hours for it can be greatly reduced. Since the image can be rewritten on the panel on the spot, there is no need to prepare and carry multiple sheets for each scene.

  FIGS. 1A and 1B are diagrams showing an example of a picture-story show set using the reversible information display panel of the present invention. FIG. 1A shows a state before rewriting, and FIG. ) Shows the state after rewriting.

  In the example shown in FIGS. 1A and 1B, a picture-story show set 1 serves as an information display panel 2 whose structure will be described in detail later, and a rewrite means for mounting information display panel 2 to rewrite information such as images. A picture-story show box 3 and a control unit 4 having picture-story show software for controlling the picture-story show box 3 are configured. Then, in accordance with the control of the control unit 4 having picture-story show software, information such as images is sequentially displayed on the information display panel 2, and the reader can explain the information such as each image, thereby expressing the same as the conventional picture-story show. It can be performed. Moreover, various picture-story shows can be performed by replacing the picture-story show software of the control unit 4.

  FIGS. 2A and 2B are diagrams showing examples of the substrate corresponding to the information display panel 2 of the picture-story show box 3. FIG. 2A is a diagram illustrating an example of the back substrate 5 of the picture-story show box 3, and the line electrode 6 is provided on the back substrate 5. FIG. 2B is a diagram illustrating an example of the front transparent substrate 7 of the picture-story show box 3. On the front transparent substrate 7, a transparent line electrode 8 is provided in a direction perpendicular to the line electrode 6.

  In the picture-story show box 3, the back substrate 5 and the front transparent substrate 7 are provided at an interval where the information display panel 2 can be taken in and out. The information display panel 2 may always be mounted between the rear substrate 5 and the front transparent substrate 7 to sequentially rewrite and display information such as images, and once the information is rewritten, You may make it take out from between the front transparent substrates 7 and give the same atmosphere as the conventional picture-story show. Thus, by arranging the line electrode 6 and the transparent line electrode 8 perpendicularly to each other, information such as a matrix image can be displayed on the information display panel 2 under the control of the control unit 4.

  Hereinafter, a reversible information display panel used in the above-described picture-story show set will be described.

  FIGS. 3A to 3C are diagrams showing an example of the structure of the reversible information display panel used in the present invention. The reversible information display panel shown in FIG. 3A is different in color and charging characteristics from each other, for example, in a sealed space containing air, between two substrates 11 and 12 that are parallel to each other. In the figure, black and white two colors, two types of display media 13B and 13W (here, a white display medium 13W composed of particles composed of particles for white display media and a black display composed of particles composed of particles for black display media) The medium 13B is enclosed). In the example shown in FIG. 3B, in addition to the example shown in FIG. 3A, a partition 14 is provided between the substrates 11 and 12 in a lattice shape to form cells. Moreover, in FIG.3 (b), the partition in front is abbreviate | omitted. Further, in the example shown in FIG. 3C, the above-described display media 13B and 13W are enclosed in a transparent capsule 17, and a plurality of capsules 17 are arranged between the substrates 11 and 12 as display media without providing a partition wall. This constitutes a reversible information display panel.

  FIGS. 4A to 4C are diagrams showing other examples of the structure of the reversible information display panel of the present invention. The reversible information display panel shown in FIGS. 4A to 4C has a conductive member 15 on the inner surface side of each of the substrates 11 and 12, in addition to those described with reference to FIGS. 16 and at least the conductive member 16 on the transparent substrate 11 side is a transparent conductive member.

  In such a reversible information display panel, an electric field is applied to display media (13W and 13B) having different charging characteristics, so that a display medium charged at a low potential moves toward a high electric field direction by Coulomb force or the like. On the other hand, the display medium charged at a high potential is attracted toward the electric field direction of the low electric potential, and the display mediums 13B and 13W are switched in the transport direction according to the change of the electric field direction, and are transparent substrates. Necessary information can be displayed on the 11 side.

  Therefore, in the places shown in FIGS. 3A to 3C and FIGS. 4A to 4C, the white display medium 13W is composed of particles composed of the white display medium particles and the black display medium particles. In accordance with the electric field applied to the substrates 11 and 12, the two-color display media 13B and 13W with the black display medium 13B made of the particles are moved vertically between the two substrates, and the display medium is By making the white display medium 13 </ b> W or the black display medium 13 </ b> B visually recognized by the observer using the size of the particles for display medium constituting the pixel unit, the display can be performed on the transparent substrate 11.

  In addition, in such a panel shown in FIGS. 3A to 3C and FIGS. 4A to 4C, a white display medium 13W including a particle group composed of particles for a white display medium is used for the white display medium. It is also possible to replace the white display medium composed of powder fluid composed of particles and the black display medium 13B composed of particles composed of particles for black display medium with the black display medium composed of powder fluid composed of particles for black display medium. it can. Further, the combination of colors of the two-color display medium of the reversible information display panel can be any combination of various colors that can be realized, as well as white and black as described above. .

  In the reversible information display panel as described above, display media 13B and 13W are sealed in a sealed space between two opposing substrates 11 and 12 which are transparent at least one, and an electric field is applied to the display media 13B and 13W. This is a reversible display panel that displays information by moving the display medium. Here, a particle group or a powder fluid is used as the display media 13B and 13W, and the display media 13B and 13W are passed through the transparent substrate 11. By viewing them, a wide viewing angle can be secured under a large contrast such as black and white. Further, the information (display contents) is rewritten, that is, the electric field is applied only when the display media 13B and 13W are moved, and after the movement, the display media 13B and 13W remain in the position where they have moved once without the effect of the electric field. Therefore, display information can be held for a long time. On the other hand, when it is desired to rewrite the information (when changing the scene in the picture-story show), the display media 13B and 13W move again to display other information (next scene) by applying the electric field again. Therefore, rewriting of information (scene progression) can be performed reversibly.

  Here, since the display medium 13 displays information directly, the size of the particles (display medium particles) constituting the display medium 13 determines the clearness of the information. Therefore, here, preferably, a display medium is composed of particles composed of particles for a display medium composed of particles having an average particle diameter of 3 to 10 μm, or the display medium is adjusted so that the particles for a display medium become a powder fluid. By doing so, the display of clear information is ensured and the display of delicate and precise information is enabled. Further, since the total thickness of the display panel 2 is configured to be very thin as 10 μm or more and less than 1 mm, these display panels are attached to the protective sheet, and the protective sheet on which the display panel is mounted is used as the rear substrate 5 and the front transparent substrate. 7 is preferably detachably attached to the picture-story show box.

  Next, an example of information display, information rewriting, and information erasing in the reversible information display panel used in the present invention having the above-described configuration will be described.

  FIG. 5 is a diagram for explaining an example of information display on the reversible information display panel used in the present invention. In the reversible information display panel used in the present invention, as shown in an example in FIG. 5, the transparent substrate 11 side outside of the reversible information display panel in which the display medium 13 (13B and 13W) is sealed between the opposing substrates 11 and 12 is used. An electrostatic field is formed on the surface by the charge forming means 21 mounted on the picture-story show box. In accordance with the electrostatic field, the display medium 13B charged to the negative polarity is attracted by the Coulomb force toward the positively charged substrate portion, and charged to the positive polarity toward the negatively charged substrate portion. The display medium 13W is attracted by Coulomb force or the like, and the display media 13W and 13B are attracted and electrostatically attached to the inner surface of the transparent substrate 11, whereby information such as an image is displayed.

  This electrostatic field is formed by transferring an electrostatic latent image formed by an ordinary electrophotographic system using an electrophotographic photosensitive member onto the reversible information display panel of the present invention, or by electrostatic flow by ion flow. Although it can also be performed by a method such as directly forming an image, it is preferably performed by a method of applying an electric field using electrode pairs arranged on the back substrate and the front transparent substrate of the picture-story show box. The display medium 13 attracted and electrostatically attracted to the inner surface of the transparent substrate 11 remains adhered even if the electrostatic field (electric field) disappears, as shown in an example in FIG. Even display information is retained (memory) as it is. FIG. 5 illustrates a positively charged white display medium 13W and a negatively charged black display medium 13B.

  FIG. 6 is a diagram for explaining an example of information rewriting in the reversible information display panel used in the present invention. Once the panel on which information such as an image is displayed is left as it is, a new charge forming means 21 applies a charge to the outer surface of the display panel on the transparent substrate 11 side as shown in FIG. An electrostatic field is formed. The display medium 13 is moved again according to the newly formed electrostatic field, and the negatively charged display medium 13 is attracted by the Coulomb force toward the positively charged substrate portion. The display medium 13 charged to the positive polarity is attracted by the Coulomb force or the like toward the substrate portion charged positively, and the display medium 13 is attracted to the inner surface of the transparent substrate 11 and electrostatically attached, thereby causing an image or the like. The information display of is rewritten. FIG. 6 illustrates a positively charged white display medium 3W and a negatively charged black display medium 3B.

  FIG. 7 is a view for explaining an example of information erasure in the reversible information display panel used in the present invention. As shown in FIG. 7, charge forming means 22 and 23 (for example, electrode pairs) are arranged on the outer surfaces of the substrates 11 and 12 of the display panel, and an alternating voltage is applied to the substrates 11 and 12, for example. Thereby, information such as images can be erased by supplying electric charges to the outer surfaces of the substrates 11 and 12 of the reversible information display panel.

  When the information display panel having the above-described configuration is used as the display panel 2 of the picture-story show set, making each of the substrates 11 and 12 made of a plastic material realizes a reduction in the thickness and weight of the display panel. It is thin and excellent in portability, and in addition, the picture-story show box can be made thin, which is preferable for making the entire picture-story show set excellent in portability.

  By the way, about the board | substrates 11 and 12 of an information display panel, those at least one board | substrate 11 is a transparent substrate which can confirm the color of a display medium from the outer side of a panel, and this board | substrate 11 has the high transmittance | permeability of visible light, and It is preferable to use a material having good heat resistance. The substrate 12 may be transparent or opaque. Examples of substrate materials include polymer sheets such as polyethylene terephthalate, polyethersulfone, polyethylene, polycarbonate, polyimide, and acrylic resin, flexible materials such as metal sheets, and flexibility such as glass and quartz. An inorganic sheet having no surface is mentioned.

  The thickness of the substrate is preferably 2 to 400 μm, more preferably 5 to 300 μm. If it is too thin, it will be difficult to maintain the strength and the uniformity of the distance between the substrates, and if it is thicker than 400 μm, there will be a disadvantage that the display medium will not move due to the electric field generated by the electric charges formed in the substrate.

In addition, the constituent materials of the conductive members 15 and 16 provided on the substrate as necessary include metals such as aluminum, silver, nickel, copper, and gold, ITO, indium oxide, conductive tin oxide, and conductive zinc oxide. Examples thereof include conductive metal oxides such as polyaniline, polypyrrole, polythiophene, and the like, which are appropriately selected and used. As a method for forming a conductive member, the above-described materials are formed into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or a conductive agent is mixed with a solvent or a synthetic resin binder. Then, a method of coating is used.
In this case, the conductive member 16 provided on the viewing side substrate 11 needs to be transparent, but the conductive member 15 provided on the back side substrate does not need to be transparent. In any case, the above-mentioned material that can form a pattern and is conductive can be preferably used.

  The thickness of the conductive member 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 conductive member 15 provided on the back side substrate 12 are the same as those of the conductive member 16 provided on the viewing side substrate described above, but need not be transparent.

  Also, as for the partition 14 provided as necessary, the shape is appropriately set appropriately depending on the type of display medium related to the display, and thus cannot be specified unconditionally, but the width of the partition is 2 The height of the partition wall is adjusted to 10 to 100 μm, preferably 10 to 50 μm. In forming the partition walls, a double rib method in which ribs are formed on each of the opposing substrates 11 and 12 and then bonded, and a single rib method in which ribs are formed only on one substrate are conceivable. In the present invention, any method is preferably used.

  The cells formed by the partition walls 14 made of these ribs are illustrated in a schematic plan view in FIG. 8 in a square shape, a triangular shape, a line shape, a circular shape, and a hexagonal shape as viewed from the substrate plane direction. Is exemplified by a lattice shape, a honeycomb shape, or a mesh shape. It is better to make the part corresponding to the partition part visible from the display surface side (the area of the cell frame part) as small as possible, and the clearness of information display increases.

  Here, examples of the method for forming the partition include a mold transfer method, a screen printing method, a sand blast method, a photolithography method, and an additive method. Any of these methods can be suitably used for the information display panel according to the present invention, and among these, a photolithography method using a resist film and a mold transfer method are suitably used.

  Next, display medium particles (hereinafter also referred to as particles) constituting the display medium 13 used in the information display panel will be described. The particles for the display medium can form a particle group by itself to form a display medium, form a particle group combined with other particles to form a display medium, or can be adjusted to become a powder fluid described later to be a display medium. can do. 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, acrylic urethane resin, acrylic urethane silicone resin, acrylic urethane fluororesin, acrylic fluororesin, silicone resin, acrylic silicone resin, epoxy resin, polystyrene, styrene acrylic resin Polyolefin, butyral resin, vinylidene chloride resin, melamine resin, phenol resin, fluororesin, polycarbonate, polysulfone, polyether, polyamide and the like, 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, polyamines, and imidazole derivatives.
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.

Examples of 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.

  Moreover, it is preferable that the particles constituting the display medium 13 have a mean particle diameter d (0.5) in the range of 3 to 10 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 the movement of the display medium. .

Furthermore, here, regarding the particle size distribution of each particle, the particle size distribution Span represented by the following formula is set to 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 expressed in μm that the particle diameter is 50% larger than this and 50% smaller than this, and d (0.1) is the ratio of particles smaller than 10%. % Is a numerical value expressing the particle diameter in μm, and d (0.9) is a numerical value expressing the particle diameter in which 90% or less of the particles are less than this in μm.)
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 of each particle, the ratio of the d (0.5) of the particle having the minimum diameter to the d (0.5) of the particle having the maximum diameter among the used particles is 50 or less, preferably 10 or less. Is important.

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 the particle size distribution are obtained from a volume-based distribution. Specifically, using a Mastersizer2000 (Malvern Instruments Ltd.) measuring instrument, put particles into a nitrogen stream and use the attached analysis software (software based on volume-based distribution using Mie theory). Measurement of diameter and particle size distribution can be performed.

  Next, for example, the powder fluid used as the display medium 13 used for the information display panel will be described. For example, the applicant has obtained the right of “Electronic Powder Fluid (registered trademark): Registration Number 4636931” for the name of the powder fluid used as the display medium in the present invention.

  The “powdered fluid” here 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, a liquid crystal is defined as an intermediate phase between a liquid and a solid, and has fluidity that is a characteristic of a liquid and anisotropy (an optical property) that is a characteristic of a 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. Therefore, it has been found here 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 a powder fluid.

  That is, the pulverulent fluid in the present invention is an intermediate state having both particle and liquid properties, as in the definition of liquid crystal (liquid and solid intermediate phase), and the gravity characteristic that is the characteristic of the particles described above. 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. In the information display panel according to the present invention, a solid substance can be obtained as a dispersoid. To do.

  The information display panel according to the present invention comprises a powder fluid exhibiting 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 by applying a low voltage. As described above, this powdered fluid is a substance in an intermediate state of both fluid and particle characteristics that exhibit fluidity by itself without borrowing the force of gas or liquid. The powder fluid can be in an aerosol state in particular, and in the information display panel according to the present invention, a solid substance is used in a state of being relatively stably suspended as a dispersoid in the gas.

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

  In addition, when used in a dry information display panel that uses particles or powdered fluid composed of particles for display media as they are as the display medium, it is important to manage the gas in the void surrounding the display medium between the panel substrates. Contributes to the improvement of stability. Specifically, it is important that the relative humidity at 25 ° C. is 60% RH or less, preferably 50% RH or less, and more preferably 35% RH or less. When used in a dry information display panel in which a particle group composed of particles or powdered fluid is enclosed in a capsule and used as a display medium, the gas in the void surrounding the display medium (display medium-encapsulated capsule) between the panel substrates is used. Management is not so important.

  3A to 3C and FIGS. 4A to 4C, the gaps are defined by the conductive members 15 and 16 (the conductive members from the portions sandwiched between the opposing substrates 11 and 12). In this case, the gas portion in contact with the so-called display medium 13 excluding the occupied portion of the display medium 13, the occupied portion of the partition wall 14 (when the partition wall is provided), and the seal portion of the information display panel.

  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 the information display panel so that the humidity is maintained. For example, filling of the display medium, assembly of the information display panel, etc. are performed in a predetermined humidity environment. It is important to apply a sealing material and a sealing method that prevent moisture from entering.

  The distance between the substrate 11 and the substrate 12 in the information display panel here may be adjusted to 10 to 100 μm, preferably 10 to 50 μm, as long as the display medium 13 can be moved and the contrast can be maintained. The volume occupancy of the display media 13B and 13W 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 media 13B and 13W is hindered, and when it is less than 5%, the contrast tends to be unclear.

  The picture-story show set using the reversible information display panel according to the present invention can erase the displayed information securely and then display new information any number of times, so that a plurality of sheets prepared for each scene to be displayed It is no longer necessary to display the image by performing predetermined printing, etc., which can greatly reduce the cost and the man-hours required for it, and generate an electric field by applying a charge or applying a voltage only when rewriting the scene. Therefore, it can be suitably used for applications such as a mobile picture-story show where power consumption is low and portability is required.

(A), (b) is a figure which shows an example of the picture-story show set using the reversible information display panel of this invention, respectively. (A), (b) is a figure which shows an example of the board | substrate of the part corresponding to the information display panel of a picture-story show box, respectively. (A)-(c) is a figure which shows an example of the structure in the reversible information display panel used by this invention, respectively. (A)-(c) is a figure which shows the other example of the structure in the reversible information display panel of this invention, respectively. It is a figure for demonstrating an example of the information display in the reversible information display panel used by this invention. It is a figure for demonstrating an example of the information rewriting in the reversible information display panel used by this invention. It is a figure for demonstrating an example of the information deletion in the reversible information display panel used by this invention. It is an approximate line top view showing the example of arrangement of the cell divided by the partition.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Picture-story show set 2 Information display panel 3 Picture-story show box 4 Control part 5 Back substrate 6 Line electrode 7 Front transparent substrate 8 Transparent line electrodes 11 and 12 Substrate 13 Display medium (particle group or powder fluid)
13W White display medium 13B Black display medium 14 Partitions 15, 16 Conductive member 17 Capsule 21, 22, 23 Charge forming means

Claims (5)

  Two types of display media are enclosed in a sealed space between two substrates facing each other and at least one of which is transparent, and the two types of display media are moved by an electric field and required on the transparent substrate side. Comprising: a reversible information display panel for displaying the information, a picture-story show box having a rewrite means for rewriting the information displayed on the information display panel, and a picture-story show software for controlling the rewrite means. Two types of display media having different sizes are used, and (2) the average particle diameter of the two types of display medium particles constituting the two types of display media used in the information display panel is in the range of 3 to 10 μm, and (3) A picture-story show set using a reversible information display panel, wherein the total thickness of the information display panel is 10 μm or more and less than 1 mm.   The thickness between at least one of the two substrates is 0.4 mm or less, and the distance between the substrates formed by the two substrates facing each other is 0.1 mm or less. A picture-story show set using the reversible information display panel described in 1.   A picture-story show set using the reversible information display panel according to claim 1 or 2, wherein each substrate is made of a plastic material.   The reversible information display panel according to any one of claims 1 to 3, wherein a particle group composed of particles for display medium or a powder fluid composed of particles for display medium is used as a display medium. A picture-story show set.   An electrode for applying an electric field to a display medium is provided on the front and back of a picture-story show box which is equipped with a reversible information display panel and demonstrates a picture-story show made of a transparent plate. A reversible information display panel according to any one of the lines.

Images