JP5019762B2 - Information display panel - Google Patents

Description

  The present invention provides a transparent display surface side substrate on which an electrode pattern is formed, a back side substrate on which an electrode pattern is formed, and a quadrangle parallel or non-parallel to the electrodes on the display surface side substrate. The present invention relates to an information display panel for displaying information by moving a display medium by enclosing the display medium in a space formed by partition walls of the above pattern and applying an electric field to the display medium.

  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, since the structure is complicated to arrange the charge transport layer and further the charge generation layer, and it is difficult to inject the charges into the conductive particles, it is difficult to rewrite the display. is there.

As one method for solving the various problems described above, at least one kind having at least one kind of particles composed of at least one kind of particles between two opposing substrates, at least one of which is transparent, has at least one kind. An information display panel that displays information by moving the display medium by enclosing the above display medium and applying an electric field to the 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 conventional information display panel, the line width of the partition pattern in the portion provided on the electrode is the same as the line width of the partition pattern in the portion provided on the substrate. The line width of the partition pattern is preferably as thick as possible in order to increase the adhesion between the partition and the electrode or substrate, but it must be as thin as possible to increase the aperture ratio so as to increase the display contrast. There is.

  As a result, in the conventional information display panel, it is difficult to achieve both sufficient adhesion between the partition wall and the electrode or the substrate and maintenance of a sufficient aperture ratio.

  An object of the present invention is to provide an information display panel that can achieve both sufficient adhesion between a partition wall and an electrode or a substrate and maintenance of a sufficient aperture ratio.

The information display panel according to the present invention, the back side of the line electrodes perpendicular to the substrate of the transparent display face side line electrodes are formed transparent display face side, the line electrodes of the display surface side is formed It is formed between a substrate on the back side and the substrate on the display surface side and the substrate on the back surface side, and each side is arranged in parallel with the line electrode on the display surface side or the line electrode on the back surface side. the septum wall thus formed space, filled with the display medium, by applying an electric field to the display media in the information display panel for displaying information by moving the display media, color on the display surface side of the partition wall A light-shielding body is integrally formed, and the colored light-shielding body has a line width of a partition wall in contact with the line electrode on the display surface side, and the color light-shielding body has a gap between the line electrodes on the display surface side on the display surface side. it was thinner than the line width of the partition wall in contact with the substrate And features.

  Preferably, the line width of the partition wall not parallel to the electrode of the substrate on the display surface side is made narrower than the line width of the partition wall parallel to the electrode of the substrate on the display surface side.

Further, the electrode constituted by ITO, preferably the substrate that forms configured by the glass.

  Furthermore, it is preferable that the line width of the partition pattern in the portion provided on the electrode is 1 to 20 μm.

  According to the present invention, the line width of the partition walls (ribs) that are not parallel to the electrodes on the display surface side substrate is different from the line width of the partition walls (ribs) that are parallel to the electrodes on the display surface side substrate. In other words, the line width of the partition walls (ribs) that are non-parallel to the electrodes on the display surface side substrate is a sufficient adhesion force among the line widths of the partition walls (ribs) that are parallel to the electrodes on the display surface side substrate. You can make at least a part of the one you have thinner. As a result, it is possible to achieve both sufficient adhesion between the partition wall and the electrode or the substrate and maintenance of a sufficient aperture ratio.

  First, the basic configuration of the information display panel of the present invention will be described. In the information display panel which is an object of the present invention, an electric field is applied to a display medium (colored shield) sealed between two opposing substrates. Along with the applied electric field direction, the charged display medium is attracted by the electric field force or Coulomb force, etc., and the moving direction of the display medium changes due to the change of the electric field direction due to the potential switching, thereby displaying information such as images. Made. Therefore, it is necessary to design the information 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 crosslinking 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 types of display medium 3 composed of at least one type of particles and different charging properties (here, a white display medium consisting of particles of white display particles 3Wa). 3W and a black display medium 3B composed of particles of black display particles 3Ba) are moved vertically to the substrates 1 and 2 in accordance with the electric field applied from the electrodes 5 and 6 provided outside the substrates 1 and 2. The black display medium 3B is visually recognized by the observer and black display is performed, or the white display medium 3W is visually recognized by the observer and white display is performed. In the example shown in FIG. 1, for example, a partition 4 is provided between the substrates 1 and 2 in a lattice form to form a cell, and the partition in front is omitted.

  In the example shown in FIG. 2, at least two or more types of display medium 3 composed of at least one type of particles and different charging properties (here, a white display medium consisting of particles of white display particles 3Wa). In accordance with the electric field generated by applying a voltage between the electrodes 5 and 6 provided on the inner side of the substrates 1 and 2, the black display medium 3 </ b> B composed of a particle group of 3 W and black display particles 3 </ b> Ba) The black display medium 3B is moved vertically to the substrates 1 and 2 so that the observer can visually recognize the black display, or the white display medium 3W is visually recognized by the observer and the white display is performed. In the example shown in FIG. 2, for example, a partition 4 is provided in a lattice shape between the substrates 1 and 2 to form cells, and the partition in front is omitted.

  In the example shown in FIG. 3, a display medium 3 having at least an optical reflectance and chargeability composed of at least one kind of particles (here, a white display medium 3 </ b> W composed of particles of white display particles 3 </ b> Wa is shown). Is moved in a direction parallel to the substrates 1 and 2 in accordance with the electric field generated by applying a voltage between the electrode 5 and the electrode 6 provided on the substrate 1, and the observer can visually recognize the white display medium 3W. The white color is displayed, or the color of the electrode 6 or the substrate 1 is displayed by making the observer visually recognize the color of the electrode 6 or 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 form a cell, and the partition in front is omitted.

  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. The fluid separation will be described later.

  4A, 4B, and 4C are a front view, an AA sectional view, and a BB sectional view of the information display panel of the present invention, respectively. In this case, a grid-like partition / black matrix (BM) pattern 11 is formed on the substrate 12 on the display surface side. As shown in FIG. 4B, in the AA cross section, one side of the partition wall 13 is interposed through a resin black matrix (BM) 14 formed integrally with the partition wall 13 in the display area. It is bonded to the electrode pattern 15 provided on the substrate 12, and the other side is bonded to a portion of the substrate 17 on the back side where the electrode pattern 18 is not provided via an adhesive 16. On the other hand, as shown in FIG. 4C, in the BB cross section, one side of the partition wall 13 is a portion where the electrode pattern 15 of the substrate 12 is not provided via the black matrix (BM) 14. The other side is bonded to an electrode pattern 18 provided on the substrate 17 on the back side through an adhesive 16.

  The adhesion between the BM material and the glass is lower than the adhesion between the BM material and the electrode, and the aspect ratio is higher by the partition wall than in the case of liquid crystal. In this case, separation at this interface tends to occur selectively. On the other hand, in order to increase the display contrast, it is better to increase the aperture ratio. For this purpose, it is necessary to make the line width of the partition / BM pattern as thin as possible.

  In the AA cross section as shown in FIG. 4B, the barrier rib / BM pattern 11 is formed on the electrode 15. The interface where both are in direct contact is between the BM / electrodes, but since the adhesive force at this interface is sufficiently secured, the width a of the partition / BM pattern 11 (rib) perpendicular to the electrode 15 is set to It can be made sufficiently thin (for example, 10 μm). On the other hand, the barrier rib / BM pattern 11 is formed directly on the substrate 12. The interface where both are in direct contact is the BM / glass interface, but the adhesive force at this interface is smaller than that between the BM / electrodes, so in order to ensure the adhesive force, it is parallel to the electrode 15. It is necessary to make the width b of the partition wall / BM pattern 11 (rib) thicker than the width a (for example, 15 μm). Therefore, since the partition wall / BM pattern 11 of the width a having sufficient contact strength can be thinned, sufficient contact strength between the partition wall 13 and the substrate 12 or the electrode 15 and a sufficient aperture ratio can be maintained. It can be compatible.

  5A, 5B, and 5C are a front view, an AA cross-sectional view, and a BB cross-sectional view, respectively, of another information display panel of the present invention. In FIG. 4, the description has been given of the case where a portion of the lattice-shaped partition / BM pattern formed in parallel with the electrode is formed in the gap between the electrodes. However, as shown in FIG. Even in the case where the portion is formed on a part of the electrode 22, the same effect as in FIG. 4 can be obtained.

  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, 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.

  Examples of electrode forming materials include metals such as aluminum, silver, nickel, copper, and gold, indium tin oxide (ITO), indium oxide, conductive tin oxide, antimony tin oxide (ATO), and conductive zinc oxide. And conductive polymers such as polyaniline, polypyrrole, polypyrrole, polythiophene, etc. are exemplified and used as appropriate. The electrode can be formed by patterning the above-described materials into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or by mixing a conductive agent with a solvent or synthetic resin binder. A method of applying and patterning is used. The electrode provided on the viewing side (display surface 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 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 shape of the partition 4 is optimally set within the scope of the present invention depending on the type of display medium involved in display, the shape and arrangement of electrodes to be arranged, and is not limited in general, but the width of the partition is preferably 2 to 100 μm, preferably Is adjusted to 3 to 50 μm, and the height of the partition wall is adjusted to 10 to 100 μm, preferably 10 to 50 μm.
In forming the partition wall, a both-rib method in which ribs are formed on each of the opposing substrates 1 and 2 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.
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 of the present invention, and among these, a photolithography method using a resist film and a mold transfer method are suitably used.

  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 used in the information display panel 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 exhibiting high fluidity in an aerosol state in which solid particles are stably suspended as a dispersoid, for example, in a gas between opposing substrates, at least one of which is transparent. Yes, such a powder fluid can be easily and stably moved by a Coulomb force or the like with a small electric field force or the like.
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, it is used as a display medium in a state where a solid substance floats relatively stably as a dispersoid in the gas.

Next, display 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 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.

  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 colorant can be distributed to produce display particles having a desired color.

  The display particles of the present invention (hereinafter also referred to as particles) 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. 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.

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 movement as a uniform display medium 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 above particle size distribution and particle size can be obtained from a laser diffraction / scattering method or the like. When laser light is irradiated onto the 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 constituting the display medium 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, the contact with the substrate, and the progress. It was found that depending on the charge decay with time, the saturation value of the charging behavior of the particles for the display medium is a dominant factor.

  As a result of intensive studies, the present inventors have evaluated the range of the appropriate charging characteristic value of the display particles by measuring the charge amount of the display 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, when applying a display medium such as a particle group or powdered fluid composed of display particles to a dry information display panel, it is important to manage the gas in the void surrounding the display medium between the substrates. 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.
1A, 1B, 3B, 3B, and 3B, the gaps are defined as electrodes 5 and 6 (electrodes on the inner side of the substrate). In other words, the gas portion in contact with the so-called display medium excluding the occupied portion of the display medium 3, the occupied portion of the partition wall 4, and the seal portion of the information display panel is meant.
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, the display medium is mounted and the information display panel is assembled 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.
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%. 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.

The present invention is not limited to the above-described embodiment, and many changes and modifications can be made.
For example, in the above embodiment, the case where the cell shape partitioned by the barrier is a square or a rectangle has been described. However, the cell shape is a parallelogram including a rhombus, and the arrangement is such that the partition has a linear rib structure. May be. In the above embodiment, the case of using strip-shaped electrodes has been described. However, the present invention can also be applied to the case of using individual electrodes arranged in a matrix. In this case, the shape of the individual electrode corresponds to the cell shape. That is, in the present invention, the square cell space 21 and the strip-shaped electrode 22 are used (see FIG. 6A), the parallelogram cell space 23 and the strip-shaped electrode 24 are used, the parallelogram-shaped The cell space 25 and the corresponding parallelogram individual electrodes 26 can be used.

  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. , Display parts for automobile supplies, card display parts such as point cards, IC cards, electronic advertisements, information boards, electronic POPs (Point Of Presence, Point Of Purchase advertising), electronic price tags, electronic shelf labels, electronic musical scores, RF- It is suitably used for a display unit of an ID device.

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), (b), (c) is the front view of the information display panel of this invention, AA sectional drawing, and BB sectional drawing, respectively. (A), (b), (c) is the front view of the other information display panel of this invention, AA sectional drawing, and BB sectional drawing, respectively. It is a figure which shows the pattern of an electrode and cell space.

Explanation of symbols

1, 2, 12, 17 Substrate 3 Display medium (particle group, powder fluid)
3W White display medium 3Wa White display particles 3B Black display medium 3Ba Black display particles 4 Partitions 5, 6, 22, 24, 26 Electrode 11 Partition / BM pattern 13 Partition 14 BM
15, 18 Electrode pattern 16 Adhesive 21, 23, 25 Cell space

Claims (5)

A substrate of a transparent display face side line electrodes are formed transparent display face side, the back side of the substrate back side of the line electrodes are formed perpendicular to the line electrodes of the display surface, the display surface together are formed between the substrate side and the back side of the substrate, each side is in line electrodes or parallel to the rear side of the line electrode lattice-shaped septal wall of the display surface thus formed space In the information display panel for displaying the information by moving the display medium by enclosing the display medium and applying an electric field to the display medium,
A colored light-shielding body is integrally formed on the display surface side of the partition wall, and the colored light-shielding body has a line width of the partition wall in contact with the line electrode on the display surface side. An information display panel , wherein the gap is made narrower than the line width of the partition wall contacting the substrate on the display surface side . 2. The information display panel according to claim 1, wherein a part of the colored light blocking member of the partition wall runs on a part of the line electrode on the display surface side of the substrate on the display surface side.   3. The information display panel according to claim 1, wherein the electrode is made of ITO.   The information display panel according to claim 1, wherein the substrate is made of glass. The line width of the pattern of the partition wall in the portion provided on the electrode, any one information display panel according to paragraph of the preceding claims, characterized in that a 1 to 20 [mu] m 4.

Images