JP2013029773A - Information display board and information display panel used therefor - Google Patents

Abstract

A display screen region has a high degree of freedom, b) a non-display region in the display screen region is small, c) electrical connection between conductive layers included in an information display panel is easy, and d) display. Proposed is an information display board that does not require a large-sized device for media placement, and e) does not cause uneven placement of the display media.
In an information display board in which a plurality of information display panels are arranged according to a predetermined display screen layout, and the information display panels adjacent to each other are joined together via a sealing material, the back surfaces adjacent to each other. The conductive layers included in the side panel substrate are electrically connected to each other by the conductive connection member provided between the outer surfaces of the back side panel substrate to constitute a back side substrate that is conductive in the surface direction of the information display board.
[Selection] Figure 3

Description

  The present invention relates to an information display board in which a plurality of information display panels are arranged according to a predetermined display screen layout, and adjacent information display panels are joined to each other, and an information display panel used therefor, in particular, a plurality of information When combining display panels to form an information display board, the degree of freedom of the information display board shape and display screen area layout is increased, and the information display panels are joined together to form the display screen area of the information display board. It is intended to reduce the non-display area.

There is known an information display panel that displays information by driving a display medium having a display memory property sealed between two substrates by applying an electric field.
Moreover, for example, an information display device described in Patent Document 1 is known as a large information display panel whose information display area exceeds A3 size, that is, an information display board.
The information display device of Patent Document 1 constitutes a large screen display by connecting a plurality of simple matrix drive type information display panels.

  Further, an information display panel having a solid conductive film as a display electrode is opposed to the pixel electrode with TFT of the display rewriting device, and an electric field generated between the solid conductive film and the pixel electrode with TFT is applied. An information display device that displays information by driving a display medium of an information display panel is known (for example, Patent Document 2).

JP 2006-58665 A International Publication No. 2010/137342 (A1) Pamphlet

  However, the information display device of Patent Document 1 has an arrangement configuration in which a plurality of information display panels having the same shape are simply arranged, and the shape and display form of the information display board and the display layout in the display screen are different. It was one.

  Moreover, in the information display apparatus of patent document 1, the space for connecting the display electrodes of each information display panel is required outside the display area, and this space becomes a non-display area where information cannot be displayed. End up. When information is displayed across the information display panels on a large screen having such a non-display area, a part of the image is not displayed in the area corresponding to the joint between the information display panels. Could not be read as.

  Furthermore, in the information display device of Patent Document 1, when joining a plurality of information display panels, it is necessary to connect a large number of display electrodes to each other, resulting in an increase in connection man-hours and high costs.

  On the other hand, when an information display panel of an information display device using a display rewriting device as shown in Patent Document 2 is made large and used as an information display board, it is large in order to arrange the display medium uniformly on the panel substrate. In this case, an increase in manufacturing cost associated with an increase in the size of the display medium arranging device has been a problem.

  Further, for example, if a display medium is arranged in a predetermined area of a large panel substrate exceeding A3 size, the amount of the display medium to be arranged may vary between the central portion and the peripheral portion of the predetermined area. There is also a problem that it is difficult to avoid and it is difficult to obtain an information display board that can display homogeneous information.

The present invention has been developed in view of the above situation,
a) The degree of freedom of the display screen area shape is high,
b) The non-display area on the display screen is small,
c) It is easy to electrically connect the conductive layers included in the information display panel,
d) There is no need to increase the size of the device for arranging the display medium,
e) An object of the present invention is to propose an information display board that does not cause uneven display medium arrangement.

That is, the gist configuration of the present invention is as follows.
1. In an information display board in which a plurality of information display panels are arranged according to a predetermined display screen layout, and the information display panels adjacent to each other are joined together via a sealing material,
The information display panel includes a thin film transistor (TFT) included in a display rewriting device in which a display medium is disposed between an observation-side panel substrate that is transparent and does not conduct in the plane direction, and a back-side panel substrate that conducts in the plane direction. It is structured to display information by driving the display medium with an electric field formed by arranging electrodes facing the observation side panel substrate,
The conductive layers included in the back side panel substrates adjacent to each other are electrically connected to each other by a conductive connecting member laid between the outer surfaces of the back side panel substrates to form a back side substrate that is conductive in the surface direction. Characteristic information display board.

2. The conductive layer of the back side panel substrate of the information display panel is a conductive substrate itself, and the back side panel substrates adjacent to each other are connected by a conductive connecting member constructed between the outer side surfaces of the back side panel substrate. 2. The information display board according to 1 above, wherein a back side substrate is formed which is electrically connected to each other and is electrically connected in a plane direction.

3. 3. The information display board according to 2 above, wherein the entire outer surface of the back side substrate is covered with a protective insulating film.

4). The conductive layer of the back-side panel substrate of the information display panel is a conductive layer formed on an insulating substrate, and the conductive layers of the back-side panel substrate adjacent to each other are used as the insulating substrate. 2. The backside substrate that is electrically connected to each other by a conductive connecting member provided between the outer side surfaces of the backside panel substrate through the formed hole structure to constitute a backside substrate that is conductive in the surface direction. Information display board.

5). The hole structure formed in the insulating substrate is a through-hole structure in which a conductive film is formed on the inner surface of the hole so that the hole structure is electrically connected to the conductive layer formed in the insulating substrate, and the conductive connection The member is a connecting sheet member having at least two convex portions that fit into the through-hole structure, and the leading ends of the convex portions are inserted into the through-hole structures of the back panel substrates adjacent to each other, and the conductive film 5. The information display board as set forth in 4 above, wherein the backside substrate that conducts in the plane direction is formed by conducting the conductive layers through each other.

6). The hole structure formed in the insulating substrate is a buried structure in which a conductive member is embedded in the hole so that the hole structure is electrically connected to the conductive layer formed in the insulating substrate, and the conductive connecting member is A connection sheet member having a protrusion to be bonded to the conductive member of the embedded structure, the protrusion being bonded to the conductive member to be an embedded structure of the back panel substrates adjacent to each other, and the conductive member being 5. The information display board according to 4, wherein the backside substrate is configured to be conductive in the plane direction by connecting the conductive layers to each other.

7). An information display panel used for the information display board according to any one of 4 to 6,
The plan view shape of the information display panel is rectangular,
The back side panel substrate is a substrate having a two-layer structure of a conductive layer and an insulating layer,
Holes are provided in the insulating layers at the four corners of the back panel substrate,
The information display panel according to claim 1, wherein the hole is provided with a hole structure for connection in which a conductive member extending from the conductive layer to the outer surface of the insulating layer is formed.

  According to the first aspect of the invention, when information display boards are formed by joining a plurality of information display panels having a structure for displaying information using a display rewriting device, a plurality of pieces of information having different shapes, sizes, and display colors are formed. Since the display panels can be arranged and the information display board can be configured by electrically connecting the conductive layers provided on the back panel substrate of each information display panel, the degree of freedom of the display screen area shape and the color-coded display An information display board with a high degree of freedom can be provided.

  In addition, with the above configuration, the size of each information display panel can be reduced to a size smaller than A3 size, and the display medium can be arranged on each substrate smaller than A3 size of each information display panel. A large display medium arranging device is not required when arranging the image on the substrate. Therefore, an increase in manufacturing cost can be avoided and, at the same time, display medium arrangement unevenness can be eliminated.

  Furthermore, the back side panel substrate of the information display panel is a substrate that conducts in the surface direction of the structure in which the conductive layer is arranged on the inner side surface, and the conductive layers included in the back side panel substrates adjacent to each other are In the outer surface of the information display panel, the conductive connection member is used for conduction, so there is no need to provide a space between the information display panels for connecting the conductive layers included in the back side panel substrates of the information display panels. Therefore, the non-display area can be reduced in the display screen area of the information display board formed by joining the information display panels, and the information display panels can be easily joined and electrically connected together. Can do.

  In particular, according to the second aspect of the present invention, the back side panel substrates that are adjacent to each other are electrically connected to each other by the conductive connecting member that is installed between the outer surfaces of the back side panel substrates. When configured, since the back panel substrate itself of the information display panels arranged in a row is a conductive layer, it is easy to join the information display panel and to electrically connect the conductive layers included in the back panel substrate of the information display panel. Can be done. Then, after this conductive layer is made conductive with a conductive connecting member, an insulating film is formed on the entire surface of the back side panel substrate of the information display board to which a plurality of information display panels are bonded in accordance with the above invention 3. An information display board is obtained in which there is no risk of electric shock even when a conductive substrate which is a conductive layer is touched.

  Further, according to the fourth invention, the conductive layer of the back side panel substrate of the information display panel is a conductive layer formed on the insulating substrate, and the conductive layers of the back side panel substrate adjacent to each other. In the case where a back side substrate is formed which is electrically connected to each other by a conductive connecting member laid between the outer surfaces of the back side panel substrate through the hole structure formed in the insulating substrate. In addition, a plurality of information display panel junctions and electrical connection of the conductive layers provided on the back side panel substrate of the information display panel can be easily performed. And since the electrical connection of the conductive layer with which the back side panel board | substrate of an information display panel is equipped can be performed in the outer surface of a back side panel board | substrate, after arrange | positioning the arranged information display panel, a conductive connection member is arrange | positioned. Thus, the back side substrate of the information display board can be a substrate that is conductive in the surface direction.

  In addition, according to the fifth invention, a through-hole structure in which a conductive film is formed on a side surface inside the hole so that the hole structure formed in the insulating substrate is electrically connected to the conductive layer formed in the insulating substrate. In addition, the conductive connection member is a connection sheet member having at least two protrusions that fit into the through-hole structure, and the tips of the protrusions are connected to the through-hole structure of the rear panel substrate adjacent to each other. When the back-side substrate that is inserted and made conductive with each other through the conductive film to be conductive in the surface direction is configured, the electrical property of the conductive layer included in the back-side panel substrate of the information display panel Since the connection can be completed with one touch, the joining of the information display panel and the electrical connection of the conductive layer provided in the back side panel substrate of the information display panel can be easily performed.

  Furthermore, according to the sixth invention, the hole structure formed in the insulating substrate is an embedded structure in which a conductive member is embedded in the hole so that the hole structure is electrically connected to the conductive layer formed in the insulating substrate. The conductive connection member is a connection sheet member having a protrusion bonded to the conductive member of the embedded structure, and the protrusion is connected to the conductive member provided in the embedded structure of the back side panel substrate adjacent to each other. Even in the case where a back side substrate that conducts in the plane direction is configured by joining and conducting the mutual conductive layers via the conductive member, electrical connection of the conductive layer provided in the back side panel substrate of the information display panel Can be completed with one touch, so that the joining of the information display panel and the electrical connection of the conductive layer provided on the back side panel substrate of the information display panel can be easily performed.

  According to the seventh aspect of the invention, the information display panel for the information display board has a rectangular shape in plan view, and the rear panel substrate is a substrate having a two-layer structure of a conductive layer and an insulating layer. A hole is provided in the insulating layer at the four corners of the panel substrate, and the hole is provided with a hole structure for connection in which a conductive member extending from the conductive layer to the outer surface of the insulating layer is formed. By adopting the information display panel, at least one set of adjacent hole structures for connecting the plurality of conductive layers and connecting the conductive layers to each other with a conductive connecting member is made adjacent to each other. Since it becomes easy to lay out, the electroconductive connection member erected on the outer surface of the back side panel substrate can be reduced. Furthermore, since the information display panel according to the seventh aspect of the invention can be manufactured uniformly regardless of the layout of the information display board, it can be efficiently manufactured as an information display panel for the information display board. can do.

It is a figure for demonstrating the principle which rewrites information using the display rewriting apparatus provided with the TFT substrate on the information display board of this invention. (A) And (b) is respectively the top view and bottom view for showing an example of a structure of the information display board in 1st Embodiment of this invention. It is AA sectional drawing of FIG.2 (b). (A) is a bottom view for showing an example of other composition of an information display board in a 2nd embodiment of the present invention. (B) is BB sectional drawing of (a). (A) is a bottom view for showing an example of other composition of an information display board in a 3rd embodiment of the present invention. (B) is CC sectional drawing of (a). (A) is a bottom view for showing an example of other composition of the information display board in a 4th embodiment of the present invention. (B) is DD sectional drawing of (a). It is a figure which shows a mode that information display is performed on the information display board of this invention using a display rewriting apparatus. (A) and (b) each illustrate a state in which a hole structure for connection of each information display panel is connected by a conductive connecting member in an information display board configured by arranging a plurality of information display panels of the present invention. It is a bottom view for doing. (A) And (b) is a figure for demonstrating an example of the kind of information display panel which comprises the information display board of this invention, and an arrangement layout, respectively. (A) And (b) is the top view and bottom view for demonstrating the structure of the Example of the information display board of this invention, respectively. It is EE sectional drawing of FIG.

Hereinafter, the present invention will be specifically described.
First, the principle of rewriting the display information on the display screen of the information display board using a display rewriting device having a TFT substrate will be described with reference to FIG. In the figure, 1 is an information display board, 2 is a display rewriting device, and these 1 and 2 constitute an information display board system 3. Further, 4 is a pixel electrode with TFT, 5 is a conductive layer (solid conductive film), 6 is an observation side substrate, 7 is a display medium, and 8 is a back side substrate. In addition, 9 is a partition and 10 is a protective layer.

  In the information display board system 3 using the display rewriting device provided with the TFT substrate, the pixel electrode 4 with TFT of the display rewriting device 2 is arranged opposite to the information display board 1 to rewrite display information on the display screen. At that time, the TFT-attached pixel electrode 4 is opposed to the observation-side substrate 6 that is not formed with the conductive layer 5 and is transparent and does not conduct in the surface direction.

  The display medium 7 arranged in the display screen area of the information display board 1 can be driven by an electric field, and in FIG. 1, includes a group of particles containing white chargeable particles and black chargeable particles having different charge polarities. It is composed of a combination of particles.

After the pixel electrode 4 with TFT of the display rewriting device 2 is opposed to the information display board 1, a connection connector terminal connected to the conductive layer 5 of the information display board 1 and a connection connector on the display rewriting device 2 side Connect to the terminal. Then, an electric field is generated between the opposing electrodes by a voltage applied to the conductive layer 5 of the information display board 1 and the pixel electrode 4 with TFT of the display rewriting device 2, and the display medium 7 (2 in FIG. 1) is generated by this electric field. Drive particle types).
Of course, after connecting the connecting connector terminal portion connected to the conductive layer 5 of the information display board 1 and the connecting connector terminal portion on the display rewriting device 2 side, the pixel electrode 4 with TFT of the display rewriting device 2 is connected. The information display board 1 may be opposed.

  The connection connector terminal connected to the conductive layer 5 of the information display board 1 may be provided on at least one of the plurality of information display panels constituting the information display board 1. It may be provided on some of the information display panels or on all of the plurality of information display panels. When the connector terminal portions for connection are provided in a plurality of information display panels constituting the information display board 1, the connector for connection on the display rewriting device 2 side according to the layout of the information display board display screen The connector terminal portion for connection to be connected to the terminal portion can be properly used.

  The information displayed on the display screen by driving the display medium 7 can be obtained even if the display rewrite device 2 is turned off and the voltage application is stopped, or the display rewrite device 2 is moved away from the display screen. Even if the connection between the connection connector terminal connected to the conductive layer 5 of the display board 1 and the connection connector terminal on the display rewriting device 2 is disconnected and the electric field formation is stopped, the display screen remains as it is. Remain. This is called display memory property.

(About the first embodiment of the information display board according to the present invention)
Next, an example of the first embodiment of the information display board according to the present invention will be described with reference to FIG. 2 and FIG. FIG. 2A and FIG. 2B are a plan view and a bottom view of the information display board in the present embodiment, respectively. FIG. 3 is a cross-sectional view taken along the line AA in FIG.

  In the figure, when the configuration is the same as in FIG. 1, the same reference numerals are given, 1a is an information display board, 11 is an information display panel, 12 is a hole structure (embedded type), 13 is a conductive connection member ( (Conductive sheet member), 14 is a conductive member (conductive material), 15 is a sealing material (moisture-proof insulating material) serving as an adhesive for joining adjacent information display panels, and 16 is a protective insulating film , 13-1 shows the protrusion of the conductive connecting member 13. 5 is a conductive layer, 8 is an insulating substrate (rear side panel substrate), and 6 is a transparent substrate (observation side panel substrate) that does not conduct in the surface direction. Reference numeral 17 denotes a display medium layer on which the display medium is arranged, 18 denotes a sealing material arranged around a frame rib surrounding the inside of the display medium layer, and 19 denotes a connection with a TFT substrate on which the pixel electrode 4 with TFT is arranged. The connector terminal part is shown.

  In the information display board 1a according to the present embodiment, a plurality of information display panels 11 are arranged according to a predetermined display screen layout, and the information display panels 11 adjacent to each other are joined to each other via a seal material 15.

  In addition, the information display panel 11 includes a display medium layer between the observation-side panel substrate 6 that is transparent and does not conduct in the plane direction, and the conductive layer 5 that is formed on the back-side panel substrate 8 that conducts in the plane direction. 17, and the display medium in the display medium layer 17 is driven to display information with an electric field formed by disposing the pixel electrode with TFT included in the display rewriting device so as to face the observation-side panel substrate 6. It has a structure.

Here, “does not conduct in the plane direction” means, in this specification, does not conduct in any direction in the plane.
Further, “conducting in the surface direction” means conducting in any direction within the surface in this specification.

  In the information display board 1a according to the present embodiment, the back side panel substrate that is conductive in the surface direction is formed by forming the conductive layer 5 that is conductive in the surface direction on the inner side surface of the insulating substrate 8, and the back surfaces adjacent to each other. In the insulating substrate 8 of the side panel substrate, at least one hole penetrating the insulating substrate is provided in the adjacent vicinity region, and the conductive layers 5 of the back panel panels adjacent to each other are embedded in the embedded holes. A characteristic is that the conductive member 14 and the conductive connecting member 13 are connected to each other through the structure 12.

Specifically, for example, the conductive member 14 is filled with the conductive member (conductive material) 14 and the conductive members 14 exposed on the surface of the insulating substrate 8 of the back side panel substrate are connected to the conductive connecting member 13. Can be conducted to each other.
At this time, if the protrusion 13-1 is formed on the conductive connecting member 13, the electric connection is completed with one touch by joining the protrusion 13-1 to the conductive member 14 having an embedded structure. An information display board can be easily formed.
The conductive connecting member 13 may be a conductive sheet, a conductive adhesive, or a sheet with a conductive film.

In addition, holes and hole structures (embedded hole structures) 12 in which conductive members are embedded are arranged at four corners for each information display panel, and only one of them is adjacent to each other. You may connect panels.
For example, as shown in FIG. 2, four information display panels 11 having embedded hole structures 12 at four corners are arranged in a matrix, and the four embedded hole structures 12 at the center are used. The information display panels 11 may be electrically connected. In addition, when the information display panel 11 is joined in a matrix form with eight or nine information display panels 11, it is sufficient to prepare an information display panel having the same structure, so that information display can be performed efficiently. Panels can be manufactured. The hole structure 12 that is not used to connect the conductive layers 5 included in the information display panel can be left as it is, and there is a great merit in improving the efficiency by manufacturing the information display panel having the same configuration.

  In addition, the conductive layers 5 provided on the back side substrates adjacent to each other need only be electrically connected to each other through one hole structure 12, but a plurality of hole structures 12 may be used in order to ensure conduction. preferable. For example, in the example shown in FIG. 2, the adjacent hole structures 12, that is, a total of five locations including the central portion 1 and the peripheral portion 4 of the information display board 1 a are electrically connected by the conductive connecting member.

Further, when a conductive adhesive is used as the conductive connecting member 13, covering the surface of the conductive adhesive with the protective insulating film 16 prevents the conductive adhesive from deteriorating and improves the conduction stability. It is preferable from the viewpoint of enhancing.
When the surface of the conductive adhesive is covered with the protective insulating film 16, only the surface of the conductive adhesive may be covered as shown, or the entire back side substrate of the information display board 1a may be covered. Also good.

Further, when a conductive sheet is used as the conductive connecting member 13, it is preferable from the viewpoint of electric shock prevention to cover the surface of the conductive sheet with the protective insulating film 16.
When the surface of the conductive sheet is covered with the protective insulating film 16, only the surface of the conductive sheet may be covered as shown, or the entire back side substrate of the information display board 1a may be covered. .

(About 2nd Embodiment of the information display board according to this invention)
Next, an example of the second embodiment of the information display board according to the present invention will be described with reference to FIG. 4A is a bottom view of the information display board according to the present embodiment, and FIG. 4B is a cross-sectional view taken along the line BB in FIG. 6A.
In the figure, 1b is an information display board, 14 'is a conductive film (conductive material), 20 is a conductive connection member (connection sheet member), and 20-1 is a conductive connection member (connection sheet member). The convex part of is shown.

  As shown in FIG. 4B, the information display board 1b according to the present embodiment includes a conductive connection member (connection sheet) having at least two protrusions 20-1 that fit into the through-hole type hole structure 12 ′. 20), and the tips of these protrusions 20-1 are joined to the conductive layer 5 through the through-hole type hole structures 12 'of the back panel panels adjacent to each other to ensure conduction. .

  Specifically, for example, a through-hole type hole structure 12 ′ in which a conductive material is formed as a conductive film 14 ′ is arranged on the inner side surface of the hole, and the convex portion 20 of the conductive connection member (connection sheet member) 20. By adopting a fitting structure in which the tip of -1 is inserted into the through-hole type hole structure 12 ', the conductive layers 5 of the back side panel substrates adjacent to each other can be made conductive.

  By adopting such a connection structure, the convex portion 20-1 of the conductive connection member (connection sheet member) 20 is fitted into the through-hole type hole structure 12 ′, and the electrical connection is completed with one touch. An information display board can be easily formed.

In addition, the through-hole type hole structure 12 'is also arranged at four corners individually for each information display panel, just like the above-mentioned buried type hole structure 12, and is adjacent to only one of them. You may connect panels.
For example, as shown in FIG. 4, four information display panels 11 having through-hole type hole structures 12 ′ at four corners are arranged in a matrix, and four through-hole type hole structures 12 at the center thereof are arranged. 'May be used to make the information display panels 11 conductive. In addition, when the information display panel 11 is joined in a matrix form with eight or nine information display panels 11, it is sufficient to prepare an information display panel having the same structure, so that information display can be performed efficiently. Panels can be manufactured. The hole structure 12 ′ not used for connecting the conductive layers 5 included in the information display panel can be left as it is, and there is a great merit in improving the efficiency by manufacturing the information display panel having the same configuration.

  Further, since the conductive connecting member (connecting sheet member) 20 is made of a conductive material, the surface of the conductive connecting member (connecting sheet member) 20 may be covered with the protective insulating film 16 to deteriorate the conductive connecting member (connecting sheet member) 20. As described above, it is preferable from the viewpoint of preventing the occurrence of electric shock and improving the stability of conduction and also preferable from the viewpoint of preventing electric shock.

(About 3rd Embodiment of the information display board according to this invention)
Next, an example of the third embodiment of the information display board according to the present invention will be described with reference to FIG. Fig.5 (a) is a bottom view of the information display board in this embodiment, FIG.5 (b) is CC sectional drawing of Fig.7 (a).
In the figure, 1c is an information display board, and 8 'is a back side panel substrate made of a conductive material.

  The feature of this embodiment is that the back side panel substrate 8 'itself is a conductive substrate, that is, the back side panel substrate 8' itself is a conductive layer. Then, as shown in FIG. 5B, the information display board 1c joins the information display panels adjacent to each other, and the conductive back panel substrates 8 ′ (conductive layers) provided in the information display panel are connected to each other. Are electrically connected to each other through a conductive connecting member 13 installed between the outer surfaces of the back side panel substrate 8 ′.

In this embodiment, a connection structure such as the hole structure provided in the information display panel in the first embodiment and the second embodiment is not necessary. Therefore, the same information display panel is prepared, freely laid out and joined together, and the information display board can be obtained simply by electrically connecting the back panel substrates to each other. it can.
Also in this embodiment, the conductive connection members 13 may be individually disposed at four locations between adjacent panels, and the adjacent panels may be connected to each other. As shown in FIG. Adjacent panels may be connected to each other by being arranged at one place so as to straddle the display panel. When a conductive adhesive is used as the conductive connecting member 13, the conductive adhesive may be provided in the form of dots between adjacent panels, or along the sides of these adjacent panels in order to make the connection more reliable. It may be provided in a long shape.

  In the present embodiment, for example, as shown in FIG. 5, four information display panels 11 are arranged in a matrix and the central portion thereof is covered with the conductive connection member 13, and the information display panels 11 are connected to each other. Since the electrical connection can be efficiently performed and the electrical connection can be easily realized at the same time, it is preferable to adopt such an arrangement structure as described in the above embodiment. It is the same as the case of.

Further, since the conductive substrate is the back panel substrate 8 ′, the conductive portion exposed on the outer surface on the back side of the information display board and the conductive portion exposed on the surface of the conductive connection member 13 are protected insulating film. As in the case of the above-described embodiment, it is preferable to cover with 16 from the viewpoint of preventing electric shock and from the viewpoint of preventing deterioration of the conductive adhesive of the conductive connecting member 13 and improving the stability of conduction. It is.
The protective insulating film 16 is formed by covering the entire back side substrate of the information display board formed by joining a plurality of information display panels. The protective insulating film 16 is formed between the information display panels. This is preferable because it increases the bonding strength.

(About 4th Embodiment of the information display board according to this invention)
Next, an example of the fourth embodiment of the information display board according to the present invention will be described with reference to FIG. FIG. 6A is a bottom view of the information display board in the present embodiment, and FIG. 6B is a cross-sectional view taken along the line DD in FIG.
In the figure, 1d is an information display board, and 21 is a hole structure (through hole) provided in the protective insulating film 16.

  As shown in FIG. 6B, the information display board 1d in the present embodiment is an information display panel in which a conductive substrate 8 ′ whose outer surface is covered with a protective insulating film 16 is a back panel substrate. The conductive substrates 8 ′ are electrically connected to each other by bonding. Then, in adjacent neighboring regions where the information display panels are adjacent to each other, at least one hole structure (through hole) 21 penetrating the protective insulating film 16 is provided in each of the protective insulating films 16 provided in the back side panel substrate. The conductive substrate 8 ′ of the back side panel substrate is electrically connected to each other by a conductive connecting member (conductive adhesive) 13 through a hole structure (through hole) 21.

In addition, as described above, the hole structure (through hole) 12 and the conductive connecting member (conductive adhesive) 13 are disposed at one place between adjacent information display panels, and the adjacent information display panels are connected to each other. As shown in FIG. 6 (a), hole structures 21 are provided in advance at the four corners of each information display panel, and conductive connection members are provided in the hole structures 21 at a plurality of positions as necessary. 13 can be formed to further ensure electrical connection between adjacent information display panels.
The hole structure 21 is also arranged at four corners for each information display panel, just like the embedded hole structure 12 and the through hole type hole structure 12 'described above, and only one of them is arranged, or Adjacent panels may be connected using only necessary portions.

  For example, as shown in FIG. 6A, four information display panels 11 having hole structures 21 at the four corners are arranged in a matrix, and the four hole structures 21 at the center are used. The information display panels 11 may be connected to each other. In addition, when the information display panel 11 is joined in a matrix form with eight or nine information display panels 11, it is sufficient to prepare an information display panel having the same structure, so that information display can be performed efficiently. Panels can be manufactured. The hole structure 21 that is not used for connecting the conductive substrates 8 ′ included in the information display panel can be left as it is, and there is a great merit in improving efficiency by manufacturing the information display panel having the same configuration.

  However, the conductive portion exposed on the surface of the conductive connecting member (conductive adhesive) 13 and the conductive portion exposed in the hole structure 21 that remains as a through hole without forming the conductive connecting member. It is preferable to cover the portion with the protective insulating film 16 from the viewpoint of preventing an electric shock and from the viewpoint of preventing the conductive connecting member (conductive adhesive) 13 from being deteriorated and improving the stability of conduction.

  According to the information display board in the first to fourth embodiments described above, as shown in FIGS. 7A and 7B, the backside substrate of the information display board includes the connection cable for the display rewriting device 2. The display screen area of each observation-side panel substrate 6 that is connected to the connection connector terminal portion 19 connected to the layer 5 and constitutes the display screen area of the information display board 1 as shown in FIG. For each of them, the TFT substrate of the display rewriting device 2 is sequentially opposed to display information, or as shown in FIG. 7B, the display rewriting device 2 straddles the display screen area of the adjacent observation side panel substrate 6. The TFT substrate can be arranged to display information.

Moreover, according to the information display board in 1st-4th embodiment, it is necessary to provide the space for connecting the conductive layers 5 with which the back side panel board | substrate of each information display panel 11 is provided between each information display panel. Therefore, the non-display area of the display screen area of the information display board can be reduced, and at the same time, electrical connection between the information display panels 11 can be easily performed.
That is, in the electrical connection shown in Patent Document 1, a space of about 500 μm to 1000 μm is required for the connection. In the present invention, such a space, that is, a gap between the panels, is 100 μm or less. Can be reduced.

  Further, the information display panel employed in the present invention is flush with the peripheral side surface of the observation side panel substrate and the peripheral side surface of the back side panel substrate, and the side surface of the frame rib provided in a frame shape for arranging the display medium. Since it is formed, a wide frame portion like a conventional information display panel is not formed. Therefore, in a display screen area configured by arranging a plurality of such information display panels, the non-display area can be made smaller than when a plurality of conventional information display panels are configured.

(About the information display panel for the information display board according to the present invention)
Next, an information display panel for an information display board according to the present invention will be described with reference to FIG. 2, FIG. 4, FIG. 6, and FIG. The information display panels shown in FIGS. 2, 4, 6, and 8 are all rectangular in plan view, and have connection hole structures at four corners.

  And this hole structure for connection is formed including the hole provided in the insulating layer which comprises a back side panel board | substrate. In the example shown in FIG. 2 (see also FIG. 3), a hole is formed in the insulating substrate 8 of the two-layer structure of the insulating layer (insulating substrate 8) and the conductive layer 5, and a conductive member is provided inside the hole. The embedded hole structure for connection is shown. In the example shown in FIG. 4B, a hole is formed in the insulating substrate 8 of the two-layer structure of the insulating layer (insulating substrate 8) and the conductive layer 5. FIG. 6B shows a hole structure for connection using a conductive film formed on the inner surface of the hole as a conductive member. In the example shown in FIG. 6B, an insulating layer (insulating film 21) and a conductive layer (conductive substrate) are shown. 8 ′) shows a hole structure for connection in which a hole is formed in the insulating film 21 of the substrate having a two-layer structure to enable connection to the conductive substrate 8 ′, and the information display panel of the present invention is Any hole structure can be employed. The method for electrically connecting the conductive layers 5 of the information display panels arranged adjacent to each other using these connection hole structures is as described above.

  In addition to the examples shown in FIGS. 2 (b), 4 (a), and 6 (a), the layout when the information display panels of the present invention are arranged to form an information display board is shown in FIGS. There is an example as shown in (b). In FIG. 8A and FIG. 8B, adjacent connecting hole structures 22 surrounded by an ellipse S are connected by a conductive connecting member. FIG. 8A shows a rectangular (A4 size) back side of an information display board configured by arranging four information display panels each having the same connection hole structure 22 at any one of the four corners. In this example, the hole structure 22 is connected by a conductive connecting member, and the entire back side substrate of the information display board is conducted in the surface direction. Further, FIG. 8B is a back side of an information display board configured by arranging five information display panels having a rectangular shape (A4 size) and having any one of the same connection hole structures 22 at the four corners. The connection hole structure 22 is connected by a conductive connecting member, and the entire back side substrate of the information display board is conducted in the surface direction. FIG. 8A and FIG. 8B each show an example in which a minimum number of conductive connecting members are arranged and electrically connected.

As the information display board 1 of the first to fourth embodiments, for example, an A6 size is provided on a display screen having a configuration in which four A4 size information display panels 11 are arranged vertically in a matrix. Display writing can be executed with the TFT substrate (not shown) facing each other.
However, the type (size, shape, display color, etc.), number, layout, and TFT substrate size of the information display panel 11 constituting the information display board 1 are not limited to the above-mentioned forms, and a desired screen layout or desired Thus, the information display board 1 capable of displaying desired information with the screen size of can be obtained.

  For example, as to the type and arrangement layout of the information display panel 11, as shown in FIG. 9 (a), A4 size vertically oriented black and white display type information display panels 11-1 and 11-2 are respectively shown in the upper right and upper left. A5 size landscape-oriented blue-white display type information display panel 11-3 and A5 size landscape-oriented red-white display type information display panel 11-4 are located at the lower right and lower left, respectively, as shown in FIG. As shown in b), black and white display type information display panels 11-5 and 11-8 in A4 size horizontally in the upper right and lower left, respectively, and black and white display type information in A4 size in the upper left and lower right, respectively. The display panels 11-6 and 11-7 can be arranged or configured freely.

Each information display panel 11 preferably has a size having a display screen that is an integral multiple of the screen size of the TFT substrate 1 of the display rewriting device.
The TFT substrate size is preferably about A7 size to A4 size from the viewpoint of portability of the display rewriting device.
In view of ease of production, the display screen size of the information display panel 11 is preferably A5 size to A4 size.

(General components of the information display board)
Hereinafter, general components of the information display board of the present invention will be described.
The plurality of information display panels constituting the information display board preferably have the same thickness. This is because the observation side surface of the information display board formed by arranging a plurality of information display panels side by side is preferably as flat as possible.
The plurality of information display panels constituting the information display board preferably have the same inter-substrate gap. This is because it is preferable to apply an electric field as uniformly as possible to a display medium (particle group) arranged between substrates of an information display board formed by arranging a plurality of information display panels. Of course, in an information display panel in which different types of display media are arranged, an inter-substrate gap suitable for driving the display medium arranged in each information display panel is formed.
Therefore, when using information display panels of different types of display media, the thickness of the information display panel formed by arranging a plurality of information display panels in the same thickness is used. It is important to make uniform. In order to make the thickness of each information display panel the same, the thickness is adjusted by the thickness of the back side panel substrate. Changing the thickness of the observation-side panel substrate is not preferable because it affects the visibility, but changing the thickness of the back-side panel substrate does not affect the visibility.

The observation side panel substrate is transparent and does not conduct in the surface direction, and is an insulating (that is, surface resistivity is 1.0 × 10 ⁸ Ω / sq to 1.0 × 10 ¹⁶ Ω / sq) substrate. An antistatic layer having a surface resistivity of 1.0 × 10 ⁵ Ω / sq to 1.0 × 10 ¹² Ω / sq can be provided on the outer surface of the substrate. A suitable electric field is formed between the TFT substrate on which the pixel electrode with TFT of the display rewriting device is formed and the conductive layer (solid conductive film) included in the back panel substrate constituting the back substrate of the information display board. Because it can.

  The back-side panel substrate can form a conductive solid film as a conductive layer on an insulating substrate, or the substrate itself can be a conductive substrate, and the conductive substrate itself can be a conductive layer. When the back panel substrate itself is a conductive substrate, it is preferable to form an insulating film on the outside of the substrate to form a protective film. This is because an electric shock can be prevented in the event of rewriting the display image.

As the display medium, it is preferable to combine two types of two colors having different charging polarities and greatly different optical reflectances, such as negatively charged white particles and positively charged black particles. The chargeable particles can be driven in a gas or vacuum, or can be driven in an insulating liquid. The latter is called an electrophoretic method, and can be used in a structure in which a chargeable particle and an insulating liquid are sealed in a capsule.
In addition to the chargeable particles, a twist ball system in which small spheres are composed of two types of hemispheres of two colors having different charging polarities and greatly different optical reflectances from each other can also be used.

The conductive layer (common electrode) conducting in the surface direction provided on the rear panel substrate of the information display panel constituting the rear substrate of the information display board is not only solid but also striped or meshed. Or can be electrically connected continuously in the form of dots. Moreover, it can also be set as the structure which uses the whole back side panel board | substrate as an electroconductive material board | substrate.
The observation side panel substrate of the information display panel that constitutes the observation side substrate of the information display board must be structured so as not to conduct in the plane direction, and the entire substrate may be composed of only an insulating material or an insulating material. A plurality of dot-like electrodes can be provided independently on the surface of the substrate so that they are not electrically connected to each other, and a structure that does not conduct in the surface direction can be obtained.

In the present invention, an information display board is formed by an electric field formed between a pair of electrodes formed so that a back side panel substrate provided in the surface direction provided on the back side of the information display board and a pixel electrode with TFT of the display rewriting device are opposed to each other. Therefore, the substrate on the back side, which is one of the counter electrode pairs, must be conductive in the surface direction and function as a common electrode. The substrate on the observation side that will enter will not conduct in the plane direction so that the electric field generated between the pair of opposed electrodes will not be shielded.
A dot-like conductive film can also be provided on the substrate on the observation side of the information display board. If the substrate is made of an insulating material, even if a conductive film is provided on the surface, the conductive film can be configured not to conduct in the plane direction unless the conductive film is electrically connected. The information is not rewritten, in other words, the display medium drive is not hindered.

A conductive film having a surface resistivity of 1.0 × 10 ⁵ Ω / sq to 1.0 × 10 ¹² Ω / sq can be provided as an antistatic layer outside the insulating substrate on the observation side of the information display board. . By providing the antistatic layer, even when an electrical disturbance is applied to the information display board after displaying the information, the influence of the disturbance can be eliminated and the displayed information can be maintained well. As the antistatic layer, a transparent film after applying a transparent conductive polymer such as polythiophene (for example, Poly (3,4-ethylenedioxythiophene) -Poly (Styrenesulfonate); PEDOT-PSS), indium tin oxide ( There are transparent films in which transparent conductive oxide particles such as ITO and tin oxide (SnOx) are dispersed in a transparent resin binder. Since the antistatic layer is provided on the transparent substrate side which is the observation side of the information display board, it needs to be transparent.

The film as the antistatic layer having a surface resistivity of 1.0 × 10 ⁵ Ω / sq to 1.0 × 10 ¹² Ω / sq covers the entire outer surface of the substrate on the information display board observation side, It arrange | positions so that it may be interrupted and the electrical conductivity of a surface direction may be decreased. Note that the antistatic layer film has an insufficient antistatic function in an island shape, but may not be a single-sided coating as long as it has a stripe shape. This provides an antistatic effect.
If the surface resistivity is smaller than 1.0 × 10 ⁵ Ω / sq, in other words, if the conductivity is high, there is a disadvantage that the entire substrate on the observation side is not a substrate that does not conduct in the plane direction, and 1.0 × If it exceeds 10 ¹² Ω / sq, there is a disadvantage that the antistatic function cannot be obtained.
The surface resistivity was measured by a method called a double ring method. In the double ring method, measurement was performed using a double ring electrode (inner pole φ16 mm, outer pole inner diameter φ30 mm, outer pole outer diameter φ40 mm) with a load of 5 N and an applied voltage of 10 V. As a measuring instrument, a “Megaresta Model HT-301” surface resistance meter manufactured by Sicid Electric was used.

  As the common electrode, a conductive material substrate can be used instead of the solid conductive film, and a conductive substrate conducting in the surface direction can be used. The conductive substrate material is not limited as long as it has conductivity, but preferably has a low electrical resistance so that the inner surface of the substrate can easily function as a common electrode, in other words, a material with high conductivity. Conductive metals such as metals such as gold, silver, copper, aluminum, nickel and chromium, and alloys containing these metals as main components are preferred. When a conductive substrate is used instead of the solid conductive film, a back side panel substrate including a common electrode that conducts in a plane direction can be configured easily and inexpensively. In this case, when the displayed information is rewritten, a voltage is applied to the inner side surface of the conductive substrate. Therefore, if an insulating film is coated on the outer side surface of the substrate, there is a risk of electric shock when touched. It is preferable because it is not present.

When the protective layer of the conductive substrate is used, when the surface resistivity is less than 1.0 × 10 ⁸ Ω / sq, when the information displayed is rewritten with the TFT substrate of the display rewriting device facing the information display board If you touch the back of the information display board, you may get an electric shock. Moreover, it is preferable that the film thickness of the insulating film in the case of making it a protective layer shall be 100 nm-5 micrometers.

The insulating film material is not particularly limited as long as it is insulative (that is, the surface resistivity is in the range of 1.0 × 10 ⁸ Ω / sq to 1.0 × 10 ¹⁶ Ω / sq). Examples include acrylic resins, polyester resins, urethane-modified acrylic resins, silicone resins, nylon resins, epoxy resins, styrene resins, butyral resins, vinylidene chloride resins, melamine resins, phenol resins, and fluororesins. You can also. In particular, when the black colored layer and the white layer are made of an insulating film material, the color of the colorant is easily developed. Polyester resin, acrylic urethane resin, acrylic urethane silicone resin, acrylic urethane fluororesin, urethane Resins and fluororesins are preferred. The surface resistivity can be adjusted by adding a charge control agent to these resins. As a film forming method, any method such as a dipping method, a spray method, a roll coater method, or a brush coating method may be used. Further, instead of forming a film, a film of the insulating material may be bonded.

  At least one observation-side panel substrate of the information display panel is a substrate having at least a display screen region so that the display medium can be confirmed from the outside. The transparent portion has a high visible light transmittance and heat resistance. Good materials are preferred. The other back panel substrate may be transparent or opaque. Examples of materials applicable to the substrate of the information display panel include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polycarbonate (PC), polyimide (PI), and polyethersulfine (PES). Further, plastic such as acrylic, glass, quartz, metal, or the like can be used. The observation-side substrate facing the TFT substrate surface of the display rewriting device is configured not to conduct in the surface direction. The thickness is preferably 2 μm to 2000 μm, more preferably 5 μm to 1000 μm. If it is too thin, it will be difficult to maintain the strength and the uniformity of the distance between the substrates, and if it is thicker than 2000 μm, it will be on the back side of the information display board. The conductive layer (common electrode) and the pixel electrode of the TFT substrate of the display rewriting device are too far apart, and there is a disadvantage that the electric field strength capable of driving the display medium cannot be obtained unless the voltage between the electrodes is increased.

  The thickness of the substrate with the conductive layer on the back side that does not oppose the TFT substrate of the display rewriting device is not particularly limited, but if it is too thick, it will not be a thin information display board or a lightweight information display board. Since it becomes difficult to install due to loss, the range of 25 μm to 2000 μm is set. Further, if the thickness of the substrate is less than 25 μm, there is a disadvantage that the bonding when a plurality of information display panels are bonded to each other to produce an information display board is not sufficient.

As a common electrode (for example, a solid conductive film) of an information display panel constituting a conductive layer on the side of the information display board disposed opposite to the pixel electrode provided on the TFT substrate, indium tin oxide (ITO), indium oxide, zinc-doped Conductive metal oxides such as indium oxide (IZO), aluminum doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, conductive zinc oxide, polyaniline, polypyrrole, polythiophene (for example,
In addition to conductive polymers such as Poly (3,4-ethylenedioxythiophene) -Poly (Styrenesulfonate) (PEDOT: PSS)), metals such as gold, silver, copper, aluminum, nickel, chromium, and these metals An alloy containing as a main component can be used.

  As a method of forming a conductive film as a conductive layer, a method of forming the above-described materials into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or metal foil (for example, rolled copper foil) A method of laminating a conductive material, a method of applying a conductive agent mixed with a solvent or a synthetic resin binder, and the like are used. The above-mentioned material that can form a pattern that conducts in the surface direction and is conductive can be suitably used. The thickness of the conductive film only needs to ensure conductivity, and is preferably 0.01 μm to 10 μm, more preferably 0.05 μm to 5 μm.

  Metal oxide materials such as ITO are less flexible than metal materials. When the conductive film is made of a metal oxide material such as ITO, it is preferably used in combination with a thin metal wire in order to prevent disconnection in the conductive film. The width of the fine metal wires is set to 1 μm to 10 μm, and they are arranged apart from each other by about 100 μm or arranged in a mesh shape having openings of about 100 μm or more. In addition, the thickness of the conductive film provided on the back substrate is designed to be 0.01 μm to 10 μm from the viewpoint of electrical resistance, productivity, and cost.

The preferred range of physical properties of the moisture-proof insulating material that functions as a sealing material and an adhesive when the information display panel is joined is as follows. Since it arrange | positions from an observation side, after hardening, the transparent thing which cannot see a protrusion is preferable.
Viscosity (before curing): 0.1 Pa · s to 10 Pa · s (25 ° C.)
Curing conditions: UV curing type, humidity curing type, or solvent removal type Insulation (after curing): Volume resistivity is 1.0 × 10 ¹³ Ω · cm to 1.0 × 10 ¹⁶ Ω cm range / moisture permeability (after curing): 1000 g / m ² or less (40 ° C., 90% RH, 24 h)
-Ion concentration (after curing): Both Na ions and Cl ions are 10 ppm or less

In the information display panel, a space between two panel substrates (an observation side panel substrate and a back side panel substrate) is secured, and partition walls (ribs) are formed to form cells for storing display media. In the information display panel according to the present invention, a frame-shaped partition wall (frame rib) is formed so as to be substantially flush with the peripheral side surfaces of the two panel substrates, leaving a sealing material arrangement space, and surrounded by the frame ribs. A cell is formed by further dividing the inner region by partition walls (ribs). When the display medium is a particle group, and the average particle diameter of the particles is about 1 μm to 20 μm, the size of the cell opening in the information display panel is about 50 μm to 100 μm if the length of one side is rectangular. Preferably, it is about 100 μm to 300 μm. In the case of a honeycomb (hexagonal) shape, the distance between the apexes facing each other is about 100 μm to 1000 μm, preferably about 100 μm to 300 μm. With such a configuration, it is difficult for the particles that repeatedly move in the cell to agglomerate or be unevenly distributed.
The cell may be a microcapsule in addition to being surrounded by a partition wall. In any case, the inside of the cell is a space filled with gas (including vacuum) or a space filled with an insulating liquid.

The arrangement of the partition walls for partitioning the inside of the frame rib formed so as to be substantially flush with the peripheral side surfaces of the two panel substrates while leaving the sealing material arrangement space in a lattice shape, honeycomb shape, mesh shape, etc. be able to.
The cross-sectional shape of the cell may be any polygon such as a quadrangle, a triangle, a hexagon, a staircase octagon, a circle, an ellipse, a racetrack, or a combination of a plurality of shapes.
From the viewpoint of reducing the proportion of the partition walls constituting the non-display area, a quadrangle, a staircase octagon or a hexagon is preferable. From the viewpoint of easily moving particles constituting the display medium, a shape having a curve is preferable. From the two points, a square with rounded corners, a hexagon with rounded corners, and a stepped octagon with rounded corners are preferably used.

As a material for forming the partition walls (ribs), a resist material is suitable, and a liquid resist material or a dry film resist material is used. As an example of the dry film resist material, Alfo NIT2 (manufactured by Nichigo Morton) or PDF300 (manufactured by Nippon Steel Chemical Co., Ltd.) can be used.
In some cases, a transparent partition wall is formed by performing photolithography without adding a pigment to the resist material. In this case, the color behind the transparent partition as viewed from the observation side can be visually recognized through the transparent partition. Therefore, the black matrix is used by utilizing the color of the substrate or the electrode on the back side. In addition to the effect and the white matrix effect, it is possible to obtain non-volatile information based on the color behind the transparent partition wall. When forming a large screen of an information display board in which a plurality of information display panels are joined together, the nonvolatile information formed on the substrate on the back side can be seen through the transparent partition.

When using a particle group containing electrified particles as a display medium and an information display board that is driven in a gas space (including vacuum), the void surrounding the display medium between the substrates constituting the display screen Gas management is important and contributes to improved display stability. Specifically, it is important that the relative humidity at 25 ° C. is 60% RH or less, preferably 50% RH or less with respect to the humidity of the gas in the void portion.
The void portion refers to a gas portion in contact with a so-called display medium, excluding an electrode, a display medium occupation portion, and a partition occupation portion from a portion sandwiched between two opposing substrates.
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 between the panel substrates so that the humidity is maintained. For example, filling of the display medium and assembly of the information display panel are performed under a predetermined humidity environment. It is important to arrange a sealing material to prevent moisture from entering. When producing the information display board of the present invention, a moisture-proof insulating material having an adhesion function and a sealing function is used as a bonding material for bonding a plurality of information display panels, so that moisture can be externally applied to the inner region of the frame rib. The minute can be prevented from entering.
Further, when producing the information display board of the present invention, in order to more reliably prevent external moisture from entering from the joint where the plurality of information display panels are joined, A moisture barrier layer can also be formed on the entire viewing side and back side. A transparent moisture barrier layer is formed on the observation side, but the moisture barrier layer on the back side may not be transparent.

The distance between the observation side panel substrate and the back side panel substrate of the information display panel constituting the information display board of the present invention is 2 μm to 500 μm, preferably 5 μm to the display medium as long as the display medium can be driven and display contrast can be maintained. It is adjusted to 200 μm according to the type of display medium.
When a group of particles containing chargeable particles is used as a display medium and driven in a gas space (including vacuum), the distance between the substrates is 10 μm to 200 μm, preferably 10 μm to 100 μm. It is adjusted with.
Further, in this case, the volume occupancy of the display medium in the gas space (including in vacuum) between the substrates is preferably 5% to 70%, more preferably 5% to 60%. When it exceeds 70%, the movement of particles as a display medium is hindered, and when it is less than 5%, the contrast tends to be unclear.

In the information display board, for example, those described below can be used as a display medium. This display medium is a display medium that is configured as a group of particles including chargeable particles and has display memory properties.
For example, 60 parts by mass of a methyl methacrylate monomer (Kanto Chemical Reagent) as a positively charged black display medium, and 40 parts by mass of ethylene glycol dimethacrylate (Wako Pure Chemical Reagent) as a polyfunctional monomer having a plurality of polymerization reactive groups in one molecule. Part (about 25 mol%) of a nigrosine compound (bontron N07: manufactured by Orient Chemical) as a positively charged charge control agent and 5 parts by mass of carbon black (special black: manufactured by Degussa) as a black pigment by a sand mill After dispersing and dissolving 5 parts by mass of (acrylic and methacrylic) resin-hydrocarbon resin block copolymer (Modiper F600: manufactured by NOF Corporation), 2 parts by mass of lauryl peroxide (Perroyl L: manufactured by NOF Corporation) ) Dissolved in polyoxyethylene as a surfactant After suspending, polymerizing, filtering and drying 0.5% of alkyl ether sodium sulfate (Latemul E-118B: manufactured by Kao), polymerizing, filtering and drying, a classifier (MDS-2: Nippon Pneumatic Industry) By using it, a group of positively charged black particles having an average particle diameter of 9.2 μm can be obtained. By adding silica fine particles (H3050VP manufactured by Wacker) to the positively chargeable black particle group and attaching them to the particle surface, a positively chargeable black display medium can be obtained.

  As a negatively charged white display medium, for example, 100 parts by mass of polymethylpentene polymer (TPX-R18; manufactured by Mitsui Chemicals) and 100 parts by mass of titanium dioxide (Taipaque CR-90: manufactured by Ishihara Sangyo Co., Ltd.) as a colorant are negative. 5 parts by mass of a phenol-based condensate (Bontron E89: manufactured by Orient Chemical Co., Ltd.) as a charge control agent for charging is melt-kneaded with a twin-screw kneader, and a jet mill (Lab Jet Mill IDS-LJ type: manufactured by Nippon Pneumatic Co., Ltd.). ), Finely pulverized using a classifier (MDS-2: Nihon Numatic Kogyo), melt spheronized using a melt spheronizer (MR-10: Nihon Numatic Kogyo), and further classified. Classification (MDS-2: Nihon Numatic Kogyo Co., Ltd.), and a negatively charged white particle group having an average particle diameter of 9.5 μm can be obtained. A white display medium can be obtained by externally adding silica fine particles (W3004 manufactured by Wacker) to the negatively charged white particle group and attaching them to the particle surface.

  As a positively charged red display medium, for example, 100 parts by mass of polymethylpentene polymer (TPX-R18; manufactured by Mitsui Chemicals), 5 parts by mass of a red pigment (CI Pigment Red 2) as a colorant, and titanium dioxide ( 90 parts by mass of Taipaque CR-90 (manufactured by Ishihara Sangyo Co., Ltd.) and 3 parts by mass of a nigrosine compound (Bontron N07: manufactured by Orient Chemical Co., Ltd.) as a positively charged charge control agent are melt-kneaded with a biaxial kneader, Lab jet mill IDS-LJ type: finely pulverized by Nippon Pneumatic Co., Ltd., classified using a classifier (MDS-2: Nihon Numatic Kogyo), and melt spheroidizer (MR-10: Japan) And then spheronized using a classifier (MDS-2: Nihon Numatic Kogyo Co., Ltd.), and the average particle size is 9.0. It is possible to obtain positively chargeable red particle group m. By adding silica fine particles (H3050VP manufactured by Wacker) to the positively charged red particle group and attaching them to the particle surface, a positively charged red display medium can be obtained.

  A particle group composed only of the chargeable particles is used as a display medium, or a particle group having a structure in which the fine particles externally added to the chargeable particles are attached in this manner is used as the display medium. The size relationship between the chargeable particles and the fine particles to be externally attached is that the average particle diameter of the chargeable particles is in the range of 1 μm to 20 μm, while the average particle diameter of the fine particles is in the range of 10 nm to 500 nm. is there. A display medium including such particle groups can be driven by an electric field formed between opposing electrodes.

The pixel electrode with TFT of the display rewriting device can be arranged as a dot electrode in a matrix or an electrode of an individually designed shape, but when used as an information display system in combination with the information display board of the present invention It is preferable to arrange in a matrix.
The size of the TFT substrate is preferably about A7 size to about B4 size in view of easy handling and portability of the display rewriting device.
The shape of the TFT substrate and the screen shape of the information display panel constituting the screen of the information display board are similar, and the ratio of the screen area S ₂ of the information display panel to the area S ₁ of the TFT substrate is defined as S ₂ / It is preferable that S ₁ = 1, 2, 3,... (This ratio is an integer).
In the display rewriting device, the drive circuit is connected to the pixel electrode of the TFT substrate, but in addition to the common electrode of the information display board (the conductive electrode provided on the back panel panel of the information display panel that is electrically connected to each other by the conductive connecting member). A connection line for connecting to the layer) is drawn out, and a tip end portion of the connection line is a connection connector terminal portion that can be connected to a connection connector terminal portion provided on the information display board. The relay cord may be connected to the connection connector terminal portion on the display rewriting device side, and the tip of the relay cord may be connected to the connection connector terminal portion provided on the information display board. It is preferable that a handle is provided so that the display rewriting device or the TFT substrate connected to the display rewriting device can be held by hand through the handle so as to face the information display board screen.

  The display rewriting device includes a TFT substrate including a pixel electrode with a thin film transistor (TFT). In addition, a protective insulating film is provided on the surface of the pixel electrode formed on the TFT substrate included in the display rewriting device. This protective insulating film does not have to be arranged, but when the display rewriting is performed with the TFT substrate surface of the display rewriting device facing the display screen area of the information display board, the pixel electrode on the TFT substrate is mechanically It is preferable to provide a protective insulating film because it can prevent damage to the device and can prevent disconnection even if the pixel electrode of the TFT substrate is damaged.

  In addition, when conducting a display rewrite with the TFT substrate surface of the display rewrite device facing the information display board screen, if a conductive foreign object is sandwiched, and there is no protective insulating film, the TFT pixel There is a possibility that the electrodes are electrically short-circuited to affect the display. However, in this case, if there is a protective insulating film, there is no fear of causing a short-circuit between the pixel electrodes.

  The display rewriting device includes a connection cable for electrically connecting a drive circuit side of the display rewriting device and a connector terminal portion of the information display board, or a relay connection cable. A connector terminal portion for connection for electrically connecting the drive circuit side and the connector terminal portion for connection of the information display board is provided.

  The connection cable and the relay connection cable are provided with connector terminal portions for connection having structures adapted to respective connection destinations at both ends of the conventional cord wire. This connecting connector terminal portion is configured to be detachable.

Examples of the present invention will be described below. In this example, two types of particles of two colors having different charging polarities are used as a display medium. As the two colors and two types of display media, the aforementioned ones were used in combination.
As the observation side panel substrate of the information display panel, a transparent A4 size polyethylene terephthalate (PET) substrate (thickness 50 μm) was used.
As the back side panel substrate of the information display panel, an A4 size copper substrate (thickness: 100 μm) was used.

  The ribs that form cells in the inner area of the frame ribs and the frame ribs (both ensure a gap between the substrates) use a dry film resist (Alfo NIT2 manufactured by Nichigo Morton Co., Ltd.) and have a lattice shape (inner space 300 μm × 300 μm) with a rib width of 30 μm and a rib height of 50 μm, and was formed on the aforementioned A4 size PET substrate (observation side panel substrate). The frame ribs were formed substantially flush with the PET substrate, leaving a sealant arrangement space.

  After the cells arranged in a lattice pattern were filled with the above-described white particle group and black particle group or the above-described white particle group and red particle group, a copper substrate was bonded to form an information display panel (A4 size). When the substrates were bonded together, the adhesive was placed on the ribs, and the sealing material was placed outside the frame ribs (outermost peripheral ribs), and then bonded together.

After arranging the four information display panels in the layout shown in FIG. 10 so that the observation side panel substrate end and the back side panel substrate end are in contact with each other, the conductive panel is placed at the position shown in FIG. A connecting member (silver paste) 13 was arranged.
As for the type and arrangement layout of the information display panel 11, as shown in FIG. 10A, the information display panels 11-1 and 11-2 of A4 size vertically oriented black and white display type are respectively shown in the upper right, upper left and lower left. 11-4 and an A4 size white-and-red display type information display panel 11-3 at the lower right.

Thereafter, as shown in FIG. 11, a moisture-proof insulating material 15 (SA3220 UV curable type manufactured by Sony Chemical & Information Device Co.) was disposed in the gap between the joints of the four information display panels. The moisture-proof insulating material 15 was disposed by pouring into the gap from the observation side using a dispenser, and then cured with ultraviolet rays. It became transparent after curing, and there was no problem in its visibility when viewed from the observation side.
Moreover, the clearance gap after hardening was about 30 micrometers.

In the example, an insulating polyurethane sheet 23 (thickness 1 mm) was further bonded with an adhesive 24 on a copper substrate 8 ′ on which a silver paste was disposed as the conductive connecting member 13. This insulating polyurethane sheet 23 is an elastic member that prevents electric shock, and also serves as an elastic member that pushes the screen back to the TFT substrate surface when the TFT substrate of the display rewriting device is pressed against the display screen. Since the electric field formed between the electrodes is made uniform and the drivability of the display medium is made uniform, a good display image can be obtained.
In the embodiment, the connector terminal portion 19 for connection with the display rewriting device is mounted on the copper substrate 8 ′ of the information display panel that becomes a white-red display screen. Even if the connector terminal portion for connection is formed in advance on the panel 11-3, the same information display board as in the embodiment can be obtained.

  The information display board of the embodiment has an A2 size display screen formed by arranging four A4 size information display panels 11 in a 2 × 2 array. An information display board system 3 that performs display with a display rewriting device having a TFT substrate surface on which pixel electrodes (300 μm × 300 μm) of A4 size TFTs are arranged in a matrix with respect to this information display board is used.

Display is performed by moving the particle group (display medium) between the TFT substrate surface and the conductive layer (copper substrate surface) on the display screen side facing the TFT substrate surface in accordance with the array pixels of the TFT substrate. did.
On the display screen of the information display board (display screen composed of the display screens of four information display panels), the TFT substrate surface is pressed at a position that falls within the display screen area of each of the four information display panels. When displayed, a good display was obtained.
The black-and-white display screen displays text information in black on a white background, the white-red display screen displays text information in red on a white background, and the entire display screen can be used to create an eye-catching display. It was.

  In addition, when a continuous graphic image is displayed by pressing the TFT substrate surface at the center of the display screen of the information display board, that is, across the display screens of the four information display panels, the monochrome display screen is displayed. A part of the figure was displayed in black on a white background, and the rest of the figure was displayed in red on a white background. The displayed graphic image was sufficient for recognizing the entire image, although the portion corresponding to the joint portion of the screen where the particle group (display medium) was not disposed was missing.

As described above, it was confirmed that the information display board of the present invention can provide a display screen having a variety of information display forms.
The information display board of the present invention can be easily manufactured by the manufacturing method as described above.

  An information display board system using the information display board of the present invention can be composed of a thin information display board having a large screen and a compact and highly portable display rewriting device. On the other hand, the TFT substrate portion of the display rewriting device is face-to-face facing, and the connection connector terminal portion on the display rewriting device side is electrically connected to the connection connector terminal portion of the information display board. When activated, information to be displayed can be displayed at any location on the screen of the information display board. In addition, the screen layout of the information display board can be designed according to the contents of the information to be displayed and the purpose of display. By changing the size of the information display panel constituting the display screen, or for displaying information constituting the display screen By changing the way the panels are arranged, the information display board can display a variety of variations. Therefore, this information display board can be suitably used for applications such as an information display board, an information bulletin board, an electronic blackboard (white board), an electronic advertising board, an explanation display board, etc. It can be used outside the container or installed as a welcome board at the entrance of a hotel or in a guest room door.

1, 1a, 1b, 1c, 1d Information display board 2 Display rewriting device 3 Information display board system 4 Pixel electrode with TFT 5 Conductive layer (common electrode)
6 Observation-side panel substrate 7 Display medium 8 Back-side panel substrate 9 Bulkhead 10 Protective layer 11 Information display panel 12, 12 ′ Connection hole structure provided on back-side panel substrate 13 Conductive connection member (conductive adhesive, etc. Parts)
13-1 Protrusion 14 Conductive member (conductive material)
15 Sealing material (moisture-proof insulating material) that joins information display panels adjacent to each other
DESCRIPTION OF SYMBOLS 16 Protection insulating film 17 Display medium layer 18 Sealing material arrange | positioned around frame rib 19 Connector terminal part for connection 20 Conductive connection member (sheet member for connection)
20-1 Convex part 21 Connection hole structure (through hole) provided in protective insulating film
22 Hole structure for connection 23 Insulating polyurethane sheet 24 Adhesive

Claims (7)

In an information display board in which a plurality of information display panels are arranged according to a predetermined display screen layout, and the information display panels adjacent to each other are joined together via a sealing material,
The information display panel includes a thin film transistor (TFT) included in a display rewriting device in which a display medium is disposed between an observation-side panel substrate that is transparent and does not conduct in the plane direction, and a back-side panel substrate that conducts in the plane direction. It is structured to display information by driving the display medium with an electric field formed by arranging electrodes facing the observation side panel substrate,
The conductive layers included in the back side panel substrates adjacent to each other are electrically connected to each other by a conductive connecting member laid between the outer surfaces of the back side panel substrates to form a back side substrate that is conductive in the surface direction. Characteristic information display board. The conductive layer of the back panel substrate of the information display panel is the conductive substrate itself,
The back-side substrates that are conductive in the surface direction are configured by electrically connecting the back-side panel substrates adjacent to each other by a conductive connecting member provided between the outer surfaces of the back-side panel substrates. Item 4. The information display board according to Item 1.   3. The information display board according to claim 2, wherein the entire outer surface of the back side substrate is covered with a protective insulating film. The conductive layer of the back panel substrate of the information display panel is a conductive layer formed on an insulating substrate,
The conductive layers of the back-side panel substrates adjacent to each other are electrically connected to each other by a conductive connecting member laid between the outer surfaces of the back-side panel substrates through a hole structure formed in the insulating substrate, The information display board according to claim 1, wherein a back-side substrate that is conductive in a plane direction is configured.   The hole structure formed in the insulating substrate is a through-hole structure in which a conductive film is formed on the inner surface of the hole so that the hole structure is electrically connected to the conductive layer formed in the insulating substrate, and the conductive connection The member is a connecting sheet member having at least two convex portions that fit into the through-hole structure, and the leading ends of the convex portions are inserted into the through-hole structures of the back panel substrates adjacent to each other, and the conductive film 5. The information display board according to claim 4, wherein the back-side substrate that conducts in the plane direction is formed by conducting the conductive layers of each other through the substrate.   The hole structure formed in the insulating substrate is a buried structure in which a conductive member is embedded in the hole so that the hole structure is electrically connected to the conductive layer formed in the insulating substrate, and the conductive connecting member is A connection sheet member having a protrusion to be bonded to the conductive member of the embedded structure, the protrusion being bonded to the conductive member to be an embedded structure of the back panel substrates adjacent to each other, and the conductive member being 5. The information display board according to claim 4, wherein the back-side substrate that conducts in the plane direction is formed by conducting the conductive layers to each other. An information display panel used for the information display board according to any one of claims 4 to 6,
The plan view shape of the information display panel is rectangular,
The back side panel substrate is a substrate having a two-layer structure of a conductive layer and an insulating layer,
Holes are provided in the insulating layers at the four corners of the back panel substrate,
The information display panel according to claim 1, wherein the hole is provided with a hole structure for connection in which a conductive member extending from the conductive layer to the outer surface of the insulating layer is formed.

Images