JP2011069912A - Information display panel, and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information display panel provided with a structure for preventing a trouble generated by exposure of an electrode from a fringe part of a substrate. <P>SOLUTION: In the information display panel, a display medium is sealed between facing substrates at least either of which is transparent, and a voltage is applied to an electrode provided on the substrate to electrically drive the display medium, and thereby information such as an image is displayed. In the information display panel, a seal part 12 is provided on the outside of an information display screen domain in order to seal a gap space between one substrate and the other substrate, and an electrode 14 to be put into the exposed state between substrate edges from the furthermore outside than the seal part 12 is arranged. The exposure part of the electrode is coated by using an insulative coating agent 15 which is liquid when being arranged, and which is hardened thereafter. The coating agent 15 is preferably the same as a sealing agent 13 for blocking an opening part 12a of the seal part 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  According to the present invention, a display medium is sealed between two opposing substrates, at least one of which is transparent, and the display medium is electrically driven by applying a voltage to an electrode provided on the substrate, whereby information such as an image is displayed. It is related with the information display panel which displays.

  2. Description of the Related Art Conventionally, an information display panel that displays information such as an image by encapsulating a display medium between two opposing substrates with electrodes that are transparent at least one and electrically driving the display medium, In order to seal between the other substrate, a structure including a seal portion SE formed by disposing a sealant outside the information display screen area of the panel is known. As shown in FIG. 4, such a seal portion SE is formed by arranging a sealing agent in an annular shape so as to surround the outside of the information display screen area DA. It is an information display panel DP that can be protected from (see, for example, Patent Document 1).

  Here, an example of the manufacturing process of the information display panel will be described in detail. When two opposing substrates are bonded together, air is applied when the sealing agent is abutted to be formed in a perfect ring shape. The internal pressure will rise excessively because there is no escape. Therefore, as shown in FIG. 5, when the sealant is disposed outside the information display screen area DA, a part of the annular shape is cut out to form an opening HL for air venting. Thereby, it is possible to perform the bonding operation of the substrates while removing the internal air. And the sealing performance is ensured by closing the opening part HL with the sealing agent ST after that. By doing so, it is possible to reliably manufacture the information display panel DP in which the seal portion SE is provided outside the information display screen area DA.

Pamphlet of International Publication WO2006 / 062155

  By the way, the information display panel as described above is also designed according to various demands as in the case of other electronic devices. That is, for reasons of the manufacturing process, assembly process, and inspection process, as shown by the arrow AR in FIG. 5, the seal part SE described above is offset inward by a small distance L from the edge part ED of the substrate. May be set. On the other hand, in order to drive the information display panel, a large number of electrodes EP such as ITO electrodes are drawn outward from the substrate from the information display region side located at the center. As a result, when the seal part SE is formed inside the peripheral part as described above, the electrode EP may be exposed at the peripheral part after the two substrates are bonded together.

  When the electrode is exposed at the peripheral edge of the substrate in this way, it is exposed during the manufacturing process after the driving IC (hereinafter referred to as the driving IC) is assembled or during the inspection of the driving IC after the manufacturing. A high-voltage (for example, 20,000 volts or more) static electricity SC is applied to the electrode from a part of the charged operator's hand or device, and as shown in FIG. High-voltage static electricity SC may flow into the output side of the driving IC and cause electrostatic breakdown. Further, in such a state, there is a space between the electrodes exposed at the peripheral edge between the two substrates PL-1 and PL-2. Therefore, as shown in FIG. When a foreign material EF is mixed, an unexpected short circuit occurs. Such intrusion of conductive foreign matter may occur in an IC mounting process, an inspection process, a product transportation process, and the like.

  If the electrodes are exposed at the peripheral edge of the substrate as described above, the driving IC may be damaged, or a short circuit may occur between the electrodes between the substrates. When such a situation occurs, the manufacturing yield of the information display panel decreases, and the manufacturing cost increases. In addition, when a short circuit occurs due to conductive foreign matter after the product is shipped, the reliability of the product is also lowered.

  Therefore, an object of the present invention is to propose an information display panel provided with a structure for solving the above-described problems and preventing inconvenience caused by the electrode being exposed at the peripheral edge of the substrate, The manufacturing method is proposed.

The object is to display information such as an image by enclosing a display medium between opposing substrates, at least one of which is transparent, and applying a voltage to electrodes provided on the substrate to electrically drive the display medium. In order to seal a gap space between one substrate and the other substrate, the display panel is provided with a seal portion outside the information display area, and an edge portion of the substrate from outside the seal portion In the information display panel in which the electrodes that are exposed between are arranged,
This can be achieved by an information display panel characterized in that the exposed portion of the electrode is liquid when disposed by coating or the like and is coated with an insulating coating that hardens thereafter.

The seal portion is provided with an air vent opening when two substrates are bonded together by cutting out a part formed in an annular shape so as to surround the outside of the information display screen area. It is a structure in which the opening is closed by a sealing agent after bonding,
It is good also as a structure which has arrange | positioned this sealing agent in the peripheral part of the said board | substrate which has exposed the electrode, using the same thing as the said sealing agent as said coating agent.

The coating agent is preferably a resin material having a volume resistivity of 1.0 × 10 ⁶ Ω · cm or more. The resin material is preferably an ultraviolet curable resin material, a room temperature drying resin material, or a two-component curable resin material.

  The ultraviolet curable resin material is preferably composed mainly of an acrylic resin, a urethane resin or an epoxy resin. The room temperature drying resin material preferably has an acrylic resin or a urethane resin as a main component. The two-component curable resin material preferably has an epoxy resin as a main component.

The above object is to display information such as an image by enclosing a display medium between opposing substrates, at least one of which is transparent, and applying a voltage to electrodes provided on the substrate to electrically drive the display medium. In order to seal a gap space between one substrate and the other substrate, a seal portion is provided outside the information display screen region, and the substrate from the outside of the seal portion. The electrodes that are exposed between the edges of the
The seal portion is cut out of a part formed in an annular shape so as to surround the outside of the information display screen area, and an opening for removing air when the two substrates are bonded together is provided. In the method for manufacturing an information display panel including a structure in which the opening is closed with a sealing agent later,
Placing a sealant for forming a seal portion at a predetermined position of at least one of the two substrates and bonding the substrates, then injecting the sealant to close the opening; and A method of manufacturing an information display panel, comprising the step of using the same sealing agent as the coating agent and covering the edge of the electrode exposed at the peripheral edge of the substrate. Is also achieved.

  According to the present invention, using an insulating coating agent that is liquid when placed on the electrode exposed outside the seal portion provided so as to surround the information display screen region by coating or the like, and then hardens. Since the coating is applied, it is possible to provide an information display panel that prevents the above-described problems of breakdown due to static electricity and the problem of short circuit due to conductive foreign matter. In particular, by using the same sealing agent used for closing the opening provided in the seal portion, an information display panel in which no electrode is exposed at the peripheral portion can be efficiently manufactured.

(A), (b) is the figure shown in order to demonstrate the fundamental structure of the information display panel used as the object of this invention. (A), (b) is the figure shown in order to demonstrate the other fundamental structure of the information display panel used as the object of this invention. It is a figure for demonstrating the characteristic structure which concerns on the information display panel of this invention, (a) is a top view which shows the whole information display panel, (b) is B part in (a). The enlarged view shown enlarged, (c) is the enlarged view which expands and shows the mode of the side surface of the C section in (b). It is the figure shown about the conventional information display panel provided with the seal | sticker part outside the information display screen area | region. It is the figure which showed the mode of the information display panel which has formed the opening part for air bleeding in the seal part. It is the figure shown in order to demonstrate the problem which generate | occur | produces when the electrode is exposed in the peripheral part of a board | substrate.

Hereinafter, further preferred embodiments of the present invention will be described with reference to the drawings.
Here, in order to facilitate understanding of the present invention, first, a charged particle moving method in which a group of particles including a chargeable particle is used as a display medium, and an image is displayed by moving the particle group by applying an electric field. The schematic configuration of the information display panel will be described.

  In the charged particle movement type information display panel, an electric field is applied to a display medium configured as a particle group including charged particles sealed in a space between two opposing substrates. Along with the applied electric field direction, the particle group serving as a display medium is attracted by the force of the electric field, the Coulomb force, or the like, and the particle group moves by the change in the electric field direction, thereby displaying information such as an image. Therefore, it is necessary to design the information display panel so that the particle group can move uniformly and maintain the stability when the display information is rewritten repeatedly or when the display information is continuously displayed. Here, the force applied to the particles constituting the display medium may be a force due to an electric field, a force attracting each other by a Coulomb force between particles, an electric mirror image force between an electrode and a substrate, an intermolecular force, a liquid crosslinking force, gravity, and the like. .

An example of the information display panel will be described with reference to FIGS. 1 (a) and 1 (b) and FIGS. 2 (a) and 2 (b).
The examples shown in FIGS. 1A and 1B show at least two types of display media having different optical reflectance and charging characteristics, which are configured as a particle group including particles having at least optical reflectance and charging properties. (Shown here is a white display medium 3W configured as a particle group including negatively charged white particles 3Wa and a black display medium 3B configured as a particle group including positively charged black particles 3Ba). In each cell, according to the electric field generated by applying a voltage to the electrode pair formed by the electrode 5 (pixel electrode with TFT) provided on the substrate 1 and the electrode 6 (common electrode) provided on the substrate 2, Move perpendicular to the substrates 1 and 2. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 1A, or the black display medium 3B is visually recognized by the observer as shown in FIG. 1B. do. Here, an example is shown in which electrode pairs (one dot) are arranged in a matrix and matrix display is performed with black and white dots.
In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted. The electrodes 5 and 6 may be provided outside the substrates 1 and 2, inside the substrate, or embedded in the substrate. Although an example in which a pixel (dot) and a cell are associated with each other on a one-to-one basis is shown, the pixel and the cell may not be associated with each other.

Further, in the example shown in FIGS. 2A and 2B, at least two types having different optical reflectivity and charging characteristics are configured as a particle group including particles having at least optical reflectivity and chargeability. The display medium (here, the white display medium 3W configured as a particle group including the negatively charged white particles 3Wa and the black display medium 3B configured as a particle group including the positively charged black particles 3Ba is illustrated) In each of the formed cells, a voltage is applied between a pair of pixel electrodes 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. Is moved perpendicularly to the substrates 1 and 2 in accordance with the electric field generated by. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 2A, or the white display is displayed by the observer, or the black display medium 3B is visually recognized by the observer as shown in FIG. 2B. do. Here, an example is shown in which electrode pairs (one dot) are arranged in a matrix and matrix display is performed with black and white dots.
In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted. The electrodes 5 and 6 may be provided outside the substrates 1 and 2, inside the substrate, or embedded in the substrate. Although an example in which a pixel (dot) and a cell are associated with each other on a one-to-one basis is shown, the pixel and the cell may not be associated with each other.

  As the substrates 1 and 2, substrates such as a glass substrate, a resin sheet substrate, and a resin film substrate can be used. The substrate 2 on the display surface side (observation side) is a transparent substrate. When an electrode for applying a voltage having a predetermined voltage and polarity (positive / negative) (common electrode or line electrode 5 described in FIG. 1 or the like) is disposed in the information display screen area of the substrate 2 Is a transparent electrode made of ITO or the like.

Regarding the above substrate, the materials for the substrate on the observation side that needs to be transparent include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), triacetyl cellulose (TAC), polycarbonate (PC), polyether sal Examples thereof include plastics such as acrylic resins such as phon (PES) and polymethyl methacrylate (PMMA), and glass. These need to be transparent, but may have a color or may be colorless.
As a material for the back side substrate, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), triacetyl cellulose (TAC), polycarbonate (PC), polyethersulfone (PES), polymethyl methacrylate (PMMA), etc. Examples thereof include plastics such as acrylic resins and glass, and these may or may not be transparent.

And in the conductive film used as the electrode or wiring electrode constituting the pixel arranged opposite to the information display screen region, as the transparent conductive film material provided on the transparent substrate on the observation side, indium tin oxide (ITO), indium oxide, Transparent conductive metal oxides such as zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, and conductive zinc oxide can be used.
In the conductive film used as the electrode or wiring electrode constituting the pixel arranged opposite to the information display screen area, the transparent conductive film material provided on the substrate on the back side is also doped with indium tin oxide (ITO), indium oxide, zinc It is common to use transparent conductive metal oxides such as indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, and conductive zinc oxide. In addition, conductive polymers such as polypyrrole and polythiophene, and conductive metals such as copper, aluminum, gold, silver, nickel, zinc, and alloys thereof can also be used.
A metal oxide-based conductive material such as ITO suitable as a transparent conductive film is less flexible than a metal material. In order to prevent disconnection in the transparent conductive film, the metal oxide transparent conductive film provided in the information display screen region of the observation side panel substrate is preferably used in combination with a thin metal wire. In particular, when the transparent conductive film is formed in a line shape, disconnection is likely to occur in the transparent conductive film, and therefore it is preferable to use it together with a fine metal wire to prevent the disconnection. The width of the fine metal wire is preferably 1 μm to 10 μm because it does not hinder display visibility. Since the conductive film provided on the rear panel substrate does not need to consider light transmission, the metal material having a low electrical resistance and excellent flexibility is preferably used. The thickness of the conductive film provided on the back panel substrate is designed to be 0.01 μm to 10 μm from the viewpoint of electrical resistance, productivity, and cost.

And the space | interval of the board | substrate in an information display panel is normally determined in the range of 10-500 micrometers according to the display medium arrange | positioned between board | substrates. When a group of particles containing chargeable particles is used as the display medium, since the average particle diameter of the chargeable particles is used in the range of 1 μm to 20 μm, the substrate interval is 10 μm to 500 μm, preferably 10 μm to 200 μm, more preferably. Is adjusted to 10 μm to 100 μm.
Further, when forming a partition wall portion provided for securing a gap between two panel substrates of an information display panel or a partition wall portion provided for forming a cell for storing a display medium configured as a particle group, a dry film is formed. A photolithography technique using a resist material is preferably used. As an example, Alfo NIT2 (manufactured by Nichigo Morton) or PDF300 (manufactured by Nippon Steel Chemical Co., Ltd.) can be used as a dry film resist material. If these dry film resist materials are blended with various pigments, a partition wall having a desired color can be obtained.
The width of the partition wall portion for securing the gap between the panel substrates is preferably in the range of 20 μm to 100 μm, and the width of the partition wall portion for forming the cell is preferably in the range of 5 μm to 30 μm.

3A and 3B are diagrams for explaining the characteristic configuration of the information display panel according to the present invention. FIG. 3A is a plan view showing the entire information display panel, and FIG. The enlarged view which shows the B section in FIG. 2, (c) is an enlarged view which expands and shows the mode of the side surface of the C section in (b).
In FIG. 3, the central portion of the information display panel 10 is an information display screen area 11. The information display screen area 11 is an area set to display information such as a desired image by collecting a large number of the above-described pixels and cells.

A seal portion 12 is formed in an annular shape so as to surround the outside of the information display area 11. As shown in FIG. 3A, the seal portion 12 is partially cut away to form openings 12a (here, two in number). The opening 12a is formed so that air can be vented when two substrates are bonded together.
FIG. 3A shows a state after the air venting is completed, and the opening 12 a is closed by the sealing agent 13. The sealing agent 13 used here is in the form of a liquid when injected into the opening 12a, and is preferable in that the sealing work can be efficiently performed by using a material that hardens thereafter.

By the way, the information display panel shown in FIG. 3 is in a position where the seal portion 12 is retracted inward (offset) from the end portion ED of the substrate for design reasons. Therefore, the end portion of the electrode (here, transparent ITO electrode 14) drawn from the information display screen region 11 side is exposed. In addition, in this Fig.3 (a), the case where the ITO electrode 14 is pulled out vertically and right is illustrated.
Note that, on the left side of FIG. 3A, the substrate 16 on the back side protrudes to the left side from the substrate 17 on the front side. A driving IC 20 and a flexible connector 21 connected to the driving IC 20 are disposed on the protruding portion. And the coating agent 22 is arrange | positioned so that these circumference | surroundings may be coat | covered. The coating agent 22 here has an insulating property like the coating agent 15 described later, but may be the same material as the coating agent 15 or a different material. From the viewpoint of manufacturing, it is convenient to use the same one. Since the coating 22 is in contact with the left seal portion 12, the ITO electrode 14 is not exposed on the left side of the information display panel 10.

In the information display panel 10 of the present invention shown in FIG. 3, the ITO electrode 14 is not exposed to the outside by coating the exposed portions of the ITO electrode 14 with insulating coatings 15 and 22. More specifically, the peripheral edge of the substrate is coated with insulating coatings 15 and 22 so as to coat the outside of the seal portion 12 and the end of the ITO electrode 14 exposed on the left side of FIG. is there.
As the coating materials 15 and 22, it is preferable to employ an insulating material that is liquid when disposed by coating or the like and is cured thereafter. Thus, if it is a material which is liquid at the time of arrangement | positioning and hardens | cures after that, it will be easy to arrange | position also to a narrow peripheral part. Further, as shown in FIG. 3 (c), such coating agents 15 and 22 are relatively easily inserted between the two substrates 16 and 17 facing each other with a narrow space therebetween. It is preferable also from the point which can do.

  Here, it is desirable to use the same coating agent 15 as the sealing agent 13 used when closing the opening 12a of the seal portion 12 described above. As described above, the sealing agent 13 and the coating agent 15 are desirably liquids that are liquid when used, and are subsequently cured, and materials that exhibit similar functions and effects such as insulation and strength are also used. Since it can be selected, sharing is easy. For example, the coating material 15 for coating the end portion of the ITO electrode 14 is required to have a predetermined insulating property or more, but it is desirable that the sealing agent 13 has the same properties, and it is necessary for strength and curing after curing. The same conditions may be used for the time. Also, the coating agent 15, the coating agent 22, and the sealing agent 13 can all be the same.

As the coating agents 15 and 22 and the sealing agent 13, it is desirable to use a resin material having a volume resistivity of 1.0 × 10 ⁶ Ω · cm or more. With such a volume resistivity resin material, the exposed end portion of the ITO electrode can be coated to prevent high-voltage static electricity from penetrating.
Further, as such a resin material, a UV (ultraviolet) curable resin material, a room temperature drying resin material, or a two-component curable resin material can be appropriately selected and employed. UV curable resin material based on acrylic resin material, urethane resin material, or epoxy resin material, and photocuring agent blended, and room temperature drying resin material as acrylic resin material, urethane resin material, or silicone resin material As the two-component curable resin material, a resin material mainly composed of an epoxy resin material can be preferably used. For example, a UV (ultraviolet) curable acrylic resin material or a room temperature drying acrylic resin material has a volume resistivity of 1.0 × 10 ¹⁴ Ω · cm to 1.0 × 10 ¹⁵ Ω · cm, and a UV (ultraviolet) curable urethane resin material. And room temperature dry urethane resin materials have a volume resistivity of 1.0 × 10 ¹³ Ω · cm to 1.0 × 10 ¹⁵ Ω · cm, and UV (ultraviolet) curable epoxy resin materials and two-component curable epoxy resin materials have volume resistance. The rate is 1.0 × 10 ⁸ Ω · cm to 1.0 × 10 ¹⁴ Ω · cm, and these can be used.

  The information display panel shown in FIG. 3 uses an insulating coating that is liquid when placed on the electrode exposed outside the seal portion provided so as to surround the information display area, and then hardens. Thus, an information display panel can be provided in which problems due to static electricity and problems due to conductive foreign matter are prevented. In particular, by using the same sealing agent used for closing the opening provided in the seal portion, an information display panel in which no electrode is exposed at the peripheral portion can be efficiently manufactured.

  When the same sealing agent 13 and coating agent 15 are used as described above, the information display panel 10 shown in FIG. 3 can be manufactured efficiently as follows. That is, after the sealing agent for forming the sealing portion 12 is disposed at one predetermined position of the substrates 16 and 17 and the substrates are bonded together, the sealing agent 13 is injected to close the opening 12a. Thereafter, the end of the electrode exposed at the peripheral edge of the substrate may be covered by using the same sealing agent 13 as the coating 15 so that the manufacturing process can be performed efficiently and the information display panel. 10 can be manufactured. That is, it is possible to cover the exposed electrode by arranging it at the end of the electrode exposed at the peripheral edge as an extension of the work of injecting a liquid sealing agent in order to close the opening of the sealing part which has been conventionally performed it can. As for the order which arrange | positions the sealing agent 13 and the coating | covering agent 15, which may be first and may be simultaneous. In any case, since the operation of arranging the sealing agent is only slightly extended as compared with the conventional manufacturing process, the yield can be improved by a slight process change.

FIG. 3 illustrates the present invention showing the information display panel in which the driver (driver) IC 20 is mounted on the rear panel substrate. However, the present invention relates to a flexible cable having the driver IC 20 mounted on the panel. The information display panel can also be implemented. Also in this case, the coating material 22 may be disposed so as to coat the electrode after mounting the flexible cable on which the driving IC is mounted.
FIG. 3 shows an information display panel using an ITO material as an electrode, and the present invention has been described. However, the present invention can also be an information display panel using a conductive material other than ITO as an electrode. . Also in this case, the coating materials 15 and 22 may be disposed as an insulating material having a volume resistivity of 1.0 × 10 ⁶ Ω · cm or more.
If the coating agent 15 and the sealing agent 13 are in a liquid state when they are arranged by application or the like, they should penetrate into a narrow gap between two opposing panel substrates formed in the range of 10 μm to 500 μm. Can do.

(Example)
Under the following conditions, the information display panel of the embodiment having the structure shown in FIG. 3 and the information display panel of the comparative example were manufactured and evaluated.
Front substrate: 700 μm thick glass substrate Row direction (panel long side direction (horizontal direction in FIG. 3A)) ITO wiring The exposed portion length from the outside of the seal portion to the glass end surface is 1.0 mm.
However, the left side was connected to the driving IC.
Back substrate: 700 μm thick glass substrate Column direction (panel short side direction (longitudinal direction in FIG. 3A)) ITO wiring The length of the exposed part from the seal part outer side to the glass end face is 1.0 mm.
Gap between panel substrates (distance between substrates 16 and 17 in FIG. 3C): 0.060 mm
For each side of the panel, UV curable acrylic resin material (volume resistivity: 1.0 × 10 ¹⁴ ) is applied to the entire peripheral edge of the substrate (upper and lower sides and right side in FIG. 3A) where the electrodes are exposed outside the seal portion. Ω · cm) was placed as coating 15. As shown in FIG. 3 (c), the coating material 15 was placed after being injected with a liquid material so as to seal the gap between the panel substrates and then cured with ultraviolet rays.
In addition, before arrangement | positioning of this coating | covering agent 15, the said UV curable acrylic resin material was arrange | positioned as a sealing agent to the opening part of the seal part as usual, and sealing was implemented.

2500 panels of the above Example were manufactured and evaluated by driving the panels.
Among 2500 panels,
1) There was no failure mode presumed to be due to mounting during the manufacturing process or application of static electricity during the inspection process.
2) There was no failure mode presumed to be due to contamination of the conductive foreign matter at the peripheral edge of the substrate outside the seal portion.

(Comparative example)
The same UV curable acrylic resin material as in the example was placed as a sealing agent in the opening of the seal part, and sealing was performed, but the peripheral part of the substrate where the electrode was exposed (the coating agent 15 was placed in the example) Part) was left without any coating. Otherwise, an information display panel was manufactured in the same manner as in the above example.
The results were as follows.
Among 2500 panels,
1) It was confirmed that there were 28 failure modes presumed to be due to mounting during the manufacturing process and the application of static electricity during the inspection process.
2) It was confirmed that six failure modes presumed to be caused by contamination of conductive foreign matters at the peripheral edge of the substrate outside the seal portion occurred.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. It can be changed.

An information display panel according to the present invention includes a notebook personal 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, and an electronic manual. Electronic paper such as (electronic instruction manuals), signboards, posters, bulletin boards such as blackboards and whiteboards, electronic desk calculators, home appliances, display parts for automobiles, card display parts such as point cards and IC cards, electronic advertisements , Information board, electronic POP (Point Of Presence, Point Of Purchase advertising), electronic price tag, electronic shelf label, electronic score, display part of RF-ID equipment, various electronic equipment such as POS terminal, car navigation device, clock It is suitably used for the display unit. In addition, it is also suitably used as a rewritable paper that is connected to an external rewriting device and performs display rewriting.
As for the driving method of the information display panel, various types of driving methods such as a simple matrix driving method and a static driving method that do not use a switching element in the panel itself, and an active driving method that uses a thin film transistor (TFT) as a switching element. Is applicable.

1, 2, 16, 17 Substrate 3 Display medium 3W White display medium 3B Black display medium 10 Information display panel 12 Sealing portion 12a Opening portion 13 Sealing agent 14 Electrode 15, 22 Coating agent

Claims (8)

An information display panel for displaying information such as an image by enclosing a display medium between at least one transparent substrate and applying a voltage to an electrode provided on the substrate to electrically drive the display medium. In order to seal the gap space between one substrate and the other substrate, a seal portion is provided outside the information display screen area, and between the edge of the substrate from the outside of the seal portion. In the information display panel in which the electrodes that are exposed are arranged,
An information display panel, wherein the exposed portion of the electrode is coated with an insulating coating that is liquid when placed and then hardens. The seal portion is cut out of a part formed in an annular shape so as to surround the outside of the information display screen area, and an opening for removing air when the two substrates are bonded together is provided. Later the opening is a structure closed by a sealing agent,
2. The information display panel according to claim 1, wherein the same sealing agent as the coating agent is used, and the sealing agent is disposed on the peripheral edge of the substrate where the electrodes are exposed. . The information display panel according to claim 1, wherein the coating material is a resin material having a volume resistivity of 1.0 × 10 ⁶ Ω · cm or more.   4. The information display panel according to claim 3, wherein the resin material is an ultraviolet curable resin material, a room temperature drying resin material, or a two-component curable resin material.   The information display panel according to claim 4, wherein the ultraviolet curable resin material is mainly composed of an acrylic resin, a urethane resin, or an epoxy resin.   The information display panel according to claim 4, wherein the room temperature drying resin material is mainly composed of an acrylic resin or a urethane resin.   The information display panel according to claim 4, wherein the two-component curable resin material includes an epoxy resin as a main component. An information display panel for displaying information by enclosing a display medium between opposing substrates, at least one of which is transparent, and applying a voltage to an electrode provided on the substrate to electrically drive the display medium. In order to seal the gap space between the other substrate and the other substrate, a seal portion is provided outside the information display screen region, and an exposed state between the edge portion of the substrate from outside the seal portion. The electrode is arranged,
The seal portion is cut out of a part formed in an annular shape so as to surround the outside of the information display screen area, and an opening for removing air when the two substrates are bonded together is provided. In the method for manufacturing an information display panel including a structure in which the opening is closed with a sealing agent later,
Placing a sealant for forming a seal portion at a predetermined position of at least one of the two substrates and bonding the substrates, then injecting the sealant to close the opening; and A method of manufacturing an information display panel, comprising the step of using the same sealing agent as the coating agent and covering the edge of the electrode exposed at the peripheral edge of the substrate. .

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