JP2009103886A - Panel for information display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel for information display, which can perform area color display by a simple step. <P>SOLUTION: In the panel for information display in which information display, such as an image, can be rewritten by applying voltage from the electrodes provided in the substrates. By driving the display medium, the color filters of the color different from the color developed by the display medium are disposed in at least part of the substrate on a display surface side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention provides information that can rewrite information display such as an image by enclosing a display medium in a space between two substrates, at least one of which is transparent, and driving a display medium by applying a voltage from an electrode provided on the substrate. The present invention relates to a display panel.
The present invention relates to an information display panel for area color display that changes the display color of a part of the panel.

  As an information display device that replaces a liquid crystal display device (LCD), an information display device in which charged particles are driven in a liquid (electrophoresis method), or a method in which charged particles are driven in a gas (for example, an electronic powder fluid method) There are known information display devices.

  As an information display panel used for an information display device of a charged particle driving system, an optical reflectance and charging property composed of at least one kind of particles in a space between two opposing substrates, at least one of which is transparent. A display medium using an information display panel in which information such as an image is displayed by moving the display medium by enclosing a display medium having a liquid crystal and applying an electric field to the display medium is known (for example, Patent Documents). 1).

  As a conventional technique for performing color display on the information display panel having the above-described configuration, black and white 2 in which transparent color filters of three primary colors (R, G, B) are arranged on the display surface side transparent substrate side and sealed in the space between the substrates. A technique for performing color display by moving a color display medium or a technique for performing color display by enclosing a display medium of three color particles and black and white particles in a space between substrates has been proposed (for example, Patent Document 2).

International Publication No. 2003/050606 Pamphlet International Publication No. 2004/006006 Pamphlet

In the information display panel described above, when a color filter is used, there is a problem that white expression is limited. That is, in the case of using a black and white two-color display medium and a color filter, an area using the color filter displays the color of the color filter and black, and an area not using the color filter displays white and black. Therefore, an area color display in which the color of the color filter and the white color are combined cannot be performed.
In addition, when color particles are used, each area must be filled with each color particle, and there is a problem that the types of color particles to be used increase and the process becomes complicated.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an information display panel which can solve the above-described problems and can perform area color display with a simple process.

  The information display panel according to the present invention encloses a display medium in a space between two substrates, at least one of which is transparent, and applies a voltage from an electrode provided on the substrate to drive the display medium to display an image or the like. In the information display panel in which information display can be rewritten, a color filter having a color different from the color developed by the display medium is provided on at least a part of the substrate on the display surface side.

  In the information display panel according to the present invention, the display medium includes a first display medium having a first color and a second display medium having a second color, and the first display medium and It is preferable to use one or more color filters having a different color from the second display medium.

  In the information display panel of the present invention, it is preferable that at least one of the first display medium and the second display medium is a chromatic color.

  In the information display panel of the present invention, the display medium is composed of a first display medium having a first color, a color plate having a second color is provided on a back substrate, the first display medium, It is preferable to use a color filter having a color different from that of the color plate.

  In the information display panel of the present invention, it is preferable that the color filter is formed over continuous display pixels of 2 dots or more.

  In the information display panel of the present invention, it is preferable that the display medium is composed of a group of particles containing chargeable particles.

  According to the present invention, a display medium is sealed in a space between two substrates, at least one of which is transparent, and information such as an image is displayed by driving the display medium by applying a voltage from an electrode provided on the substrate. An information display panel that can be rewritten, and can provide area color display in a simple process by providing a color filter of a color different from the color developed by the display medium on at least a part of the substrate on the display surface side. Can be provided.

  First, in the information display panel of the present invention, a configuration in which a particle group including a chargeable particle is used as a display medium will be described. An information display panel using a particle group including a chargeable particle as a display medium is configured as a particle group including a particle having optical reflectivity and chargeability enclosed in a space between two opposing substrates. An electric field is applied to the display medium. Along with the applied electric field direction, the display medium is attracted by an electric field force or a Coulomb force, and the display medium is moved (driven) by a change in the electric field direction, whereby information such as an image is displayed. 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 the information display panel of the present invention will be described with reference to FIGS.
In the example shown in FIGS. 1A and 1B, a display medium (comprising at least one kind of particles including particles having optical reflectivity and chargeability) having different optical reflectivity and charging characteristics ( At least two kinds of particle groups) (here, a white display medium 3W composed of particle groups of white chargeable particles 3Wa and a blue display medium 3BL composed of particle groups of blue chargeable particles 3BLa) are enclosed between the substrates, In each cell formed by the partition walls 4, according to the electric field generated by applying a voltage between the electrode 5 (individual electrode) provided on the substrate 1 and the electrode 6 (individual electrode) provided on the substrate 2, Move perpendicular to the substrates 1 and 2. A red color filter 22R is provided on a part of the substrate 2 on the display surface side.
In FIG. 1A, in order from the left cell, black display by the red color filter 22R and the blue display medium 3BL, red display by the red color filter 22R and the white display medium 3W, blue display by the blue display medium 3BL, white White display is performed by the display medium 3W. In FIG. 1B, red, black, white, and blue are displayed in order from the left cell by reversing the direction of the electric field. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted. The electrode may be provided outside the substrate or may be provided so as to be embedded inside the substrate. Here, the display unit (1 dot) is configured by associating the cell formed by the partition walls with the individual electrode pair facing each other. This partition is not necessarily provided, but it is preferable to provide a partition between a region where the color filter is provided and a region where the color filter is not provided.
As described above, by using a two-color display medium and a one-color filter, four-color display is possible, and area color display can be achieved with a simple process.

In the example shown in FIGS. 2A and 2B, a display medium (comprising at least one kind of particles including particles having optical reflectivity and chargeability) having different optical reflectivity and charging characteristics from each other ( At least two kinds of particle groups) (here, a white display medium 3W composed of particle groups of white chargeable particles 3Wa and a blue display medium 3BL composed of particle groups of blue chargeable particles 3BLa) are enclosed between the substrates, In each cell formed by the partition walls 4, a voltage is applied between an electrode pair formed by the electrode 5 (line electrode) provided on the substrate 1 and the electrode 6 (line electrode) provided on the substrate 2 crossing each other at right angles. The substrate is moved perpendicularly to the substrates 1 and 2 in accordance with the electric field generated. A red color filter 22R is provided on a part of the substrate 2 on the display surface side.
In FIG. 2A, in order from the left cell, black display by the red color filter 22R and the blue display medium 3BL, red display by the red color filter 22R and the white display medium 3W, blue display by the blue display medium 3BL, white White display is performed by the display medium 3W. In FIG. 2B, red, black, white, and blue are displayed in order from the left cell by reversing the direction of the electric field. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted. The electrode may be provided outside the substrate or may be provided so as to be embedded inside the substrate. Here, the display unit (1 dot) is configured by associating the cell formed by the partition walls with the individual electrode pair facing each other. This partition is not necessarily provided, but it is preferable to provide a partition between a region where the color filter is provided and a region where the color filter is not provided.
As described above, by using a two-color display medium and a one-color filter, four-color display is possible, and area color display can be achieved with a simple process.

In the example shown in FIGS. 3A and 3B, a display medium (in this case, a particle group of white chargeable particles 3Wa) including at least one kind of particles including particles having optical reflectivity and chargeability. In accordance with the electric field generated by applying a voltage between the electrode 5 and the electrode 6 provided on the substrate 1 in each cell formed by the partition walls 4. Then, it is moved in the direction parallel to the substrates 1 and 2. Further, a red color filter 22R is provided on a part of the substrate 2 on the display surface side, and a blue plate 7BL is provided on the substrate 1 on the back surface side.
3A, in order from the left cell, black display by the red color filter 22R and the blue plate 7BL, red display by the red color filter 22R and the white display medium 3W, blue display by the blue plate 7BL, and white display medium. White display by 3W is performed. In FIG. 3B, red, black, white, and blue are displayed in order from the left cell by reversing the direction of the electric field. In addition, in the example shown to Fig.3 (a), (b), the partition in front is abbreviate | omitted. The electrode may be provided outside the substrate or may be provided so as to be embedded inside the substrate. Here, the cell formed by the partition is a display unit (1 dot). This partition is not necessarily provided, but it is preferable to provide a partition between a region where the color filter is provided and a region where the color filter is not provided.

In the example shown in FIGS. 4A and 4B, instead of the cell formed by the partition wall 4, a microcapsule 9 filled with white chargeable particles 3 Wa and blue chargeable particles 3 BLa together with an insulating liquid 8. Is used. The white chargeable particles 3Wa and the blue chargeable particles 3BLa are moved in accordance with an electric field generated by applying a voltage between the electrode 5 and the electrode 6 provided on the substrate 1. A red color filter 22R is provided on a part of the substrate 2 on the display surface side.
In FIG. 4A, in order from the left cell, black display by the red color filter 22R and the blue chargeable particles 3BLa, red display by the red color filter 22R and the white chargeable particles 3Wa, and blue by the blue chargeable particles 3BLa. Display, white display is performed by the white chargeable particles 3Wa. In FIG. 4B, red, black, white, and blue are displayed in order from the left cell by reversing the direction of the electric field. In addition, in the example shown to Fig.4 (a), (b), the partition in front is abbreviate | omitted. The electrode may be provided outside the substrate or may be provided so as to be embedded inside the substrate. Here, one microcapsule is a display unit (1 dot).

5A and 5B show display examples of the information display panel of the present invention. A red color filter 22 </ b> R is provided on the upper left of the information display panel 10. Further, similarly to the example of FIG. 1, a white display medium and a blue display medium are enclosed.
As shown in FIG. 5A, in the area where the red color filter 22R is provided, the background red is displayed in black, and in the area where the red color filter 22R is not provided, the background white is displayed in blue.
In FIG. 5B, by reversing the direction of the electric field, red display is performed on the background black in the area where the red color filter 22R is provided, and white is displayed on the background blue in the area where the red color filter 22R is not provided. Display.

In the above example, four color display of black, red, blue, and white has been described using a red color filter, a white display medium, and a blue display medium or a blue plate, but in the following, combinations of other colors An example will be described by taking as an example a case where a particle group containing charged particles is used as a display medium.
In each row of Table 1, display colors corresponding to the color of the color filter used and the color of the two particles are shown. The writing in Table 1 indicates a state when a potential is applied so that positively charged particles move to the display surface side substrate, and erasure indicates a potential so that the negatively charged particles move to the display surface side substrate. Shows the state when applied.
For example, if a red color filter, green particles, and white particles are used in the top row of Table 1, the area with the red color filter is displayed in black or red, and the area without the red color filter is green. Or it becomes white display.
In addition, although red, green, blue, cyan, magenta, and yellow are illustrated as color filters and particle colors, the present invention is not limited to this.

  Next, Table 2 shows the average transmittance of the designed color filter, and Table 3 shows the average optical reflectance of the color particles designed.

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

  As for the substrate, at least one of the substrates (display surface side substrate) is a transparent substrate on which the color developed by 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 used. Is preferred. The back substrate may be transparent or opaque. Examples of substrate materials include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyethylene (PE), polycarbonate (PC), polyimide (PI), acrylic and other plastic substrates and glass A substrate is used. 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 provided on the information display panel, metals such as aluminum, silver, nickel, copper, and gold, indium tin oxide (ITO), zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), Examples include conductive metal oxides such as indium oxide, conductive tin oxide, antimony tin oxide (ATO), and conductive zinc oxide, and conductive polymers such as polyaniline, polypyrrole, and polythiophene. As a method for forming the electrode, a method of forming the above-described materials into a thin film by sputtering, vacuum vapor deposition, CVD (chemical vapor deposition), coating, or the like, or a method of laminating metal foil (for example, rolled copper foil) ) Or a method in which a conductive agent is mixed with a solvent or a synthetic resin binder and applied. 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. In addition, the thickness of an electrode should just ensure electroconductivity and there is no trouble in light transmittance, and 0.01-10 micrometers, Preferably 0.05-5 micrometers is suitable. The material and thickness of the electrode provided on the back side substrate 1 are the same as those of the electrode and conductive member provided on the display 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.

When partition walls are used to form cells in the space between the substrates of the information display panel, the height and width of the partition walls are optimally set according to the type of display medium involved in the display and are not limited in general. Is adjusted to 2 to 100 μm, preferably 3 to 50 μm, and the height of the partition wall is adjusted to 10 to 500 μm, preferably 10 to 200 μm. As shown in FIG. 6, the cells in the information display panel obtained by superimposing the display side substrate and the back side substrate are polygons such as a square shape, a triangular shape, a line shape, a circular shape, and a hexagonal shape as viewed from the substrate plane direction. However, any of a circular shape, an oval shape, a race track shape, and the like may be used, or different shapes may be combined. Of these, polygons with rounded corners (especially quadrangles with rounded corners), circles, ellipses, and racetracks are preferable as the display medium that can easily move. Examples of the arrangement include a lattice shape, a honeycomb shape, and a mesh shape. Various shapes are used depending on the shape of the partition wall. Among these, a configuration in which square cells with rounded corners are arranged in a lattice shape is preferable, and a portion corresponding to a partition wall cross-sectional portion seen from the display surface side (the area of the cell frame formed by the partition wall width) is made as small as possible. It is better and the clearness of the display state increases.
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 preferably used, but among these, a photolithography method using a resist film and a mold transfer method are preferably used.

Next, chargeable particles (hereinafter also referred to as particles) in the case where the display medium is composed of a particle group including chargeable particles will be described. The chargeable particles can be used as a display medium by being composed of the chargeable particles as they are, or by being combined with other particles as a display medium.
The chargeable particles can contain a charge control agent, a colorant, an inorganic additive, and the like, if necessary, in the resin as the main component, as in the conventional case. Examples of resins, charge control agents, colorants, and other additives will be given below.

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

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

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

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

Yellow colorants include chrome yellow, 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.

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 above colorant can be blended to produce chargeable particles of a desired color.

  The chargeable particles of 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.

Furthermore, in the chargeable particles of 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 of each particle.
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, it is important that the ratio of d (0.5) of particles having the smallest diameter to d (0.5) of particles having the largest diameter among the charged particles used is 10 or less. 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 particle size of the above-mentioned chargeable particles 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 chargeable particles naturally depends on the measurement conditions, but the charge amount of the chargeable 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 chargeable particles is the dominant factor.

  As a result of intensive studies, the present inventors have found that the range of the appropriate charging characteristic value of the charging particles can be evaluated by measuring the charge amount of the charging particles using the same carrier particles in the blow-off method. .

Furthermore, when the information display panel of the present invention is a dry information display panel that is driven by using a group of particles containing chargeable particles in a gas space as a display medium, the gas in the void surrounding the display medium can be managed. It is important and contributes to improved display 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.
For example, in FIG. 1 (a), the gap portion refers to the electrodes 5 and 6 (when electrodes are provided inside the substrate), the occupied portion of the display medium 3, from the portion sandwiched between the opposing substrate 1 and substrate 2. The gas portion in contact with the so-called display medium excluding the occupied portion of the partition wall 4 and the seal portion of the information display panel is assumed.
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 must be sealed in the information display panel so that the humidity is maintained. For example, filling of particles constituting the display medium, assembly of the information display panel, etc. are performed in a predetermined humidity environment. In addition, it is important to apply a sealing agent and a sealing method for preventing moisture from entering from the outside.

Among the information display panels of the present invention, the distance between the substrates in the particle group movement type information display panel containing charged particles is not limited as long as the display medium (particle group) can move and the contrast can be maintained. Is usually adjusted to 10 to 100 μm, preferably 10 to 50 μm.
The volume occupancy of the particle group including the chargeable particles in the gas space between the opposing substrates is preferably 5 to 70%, and 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 information display panel of 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, a handy terminal, an electronic book, an electronic newspaper, an electronic manual ( Electronic paper such as instruction manuals, signboards, posters, bulletin boards such as blackboards (whiteboards), electronic desk calculators, display units such as home appliances, automobile supplies, card display units such as point cards and IC cards, electronic advertisements, In addition to information boards, electronic POPs (Point Of Presence, Point Of Purchase advertising), electronic price tags, electronic shelf labels, electronic musical scores, RF-ID device displays, various electronic devices such as POS terminals, car navigation devices, watches, etc. In addition to being used suitably for the display unit, it is also suitable for use as a rewritable paper that is mounted on a rewriting device and rewrites the display. I can.

  The information display panel driving method of the present invention is a simple matrix driving method or static driving method that does not use a switching element in the panel itself, a three-terminal switching device represented by a thin film transistor (TFT), or a thin film diode ( Various types of driving methods such as an active matrix driving method using a two-terminal switching element represented by TFD) can be applied.

(A), (b) is a figure which shows an example of the information display panel of this invention, respectively. (A), (b) is a figure which shows the other example of the information display panel of this invention, respectively. (A), (b) is a figure which shows the other example of the information display panel of this invention, respectively. (A), (b) is a figure which shows the other example of the information display panel of this invention, respectively. (A), (b) is a figure which shows the example of a display of the information display panel of this invention, respectively. It is a figure which shows an example of the shape of the partition in the information display panel of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Back side board | substrate 2 Display side transparent substrate 3 Display medium 3W White display medium 3BL Blue display medium 3Wa White charged particle 3BLa Blue charged particle 4 Bulkhead 5, 6 Electrode 7BL Blue plate 8 Insulating liquid 9 Microcapsule 10 Information display Panel 22R Red color filter 22G Green color filter 22BL Blue color filter

Claims (6)

An information display panel capable of rewriting information display such as an image by enclosing a display medium in a space between two substrates, at least one of which is transparent, and applying a voltage from an electrode provided on the substrate to drive the display medium In
An information display panel, wherein a color filter having a color different from a color developed by the display medium is provided on at least a part of a substrate on a display surface side. The display medium includes a first display medium having a first color and a second display medium having a second color,
The information display panel according to claim 1, wherein at least one type of color filter having a color different from that of the first display medium and the second display medium is used.   The information display panel according to claim 2, wherein at least one of the first display medium and the second display medium is a chromatic color. The display medium comprises a first display medium having a first color;
A color plate having a second color is provided on the back substrate;
The information display panel according to claim 1, wherein a color filter having a color different from that of the first display medium and the color plate is used.   5. The information display panel according to claim 1, wherein the color filter is formed over continuous display pixels of 2 dots or more.   The information display panel according to claim 1, wherein the display medium is composed of a particle group including a chargeable particle.

Images