JP2013003171A - Information display panel module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid occurrence of detachment of an anisotropic conductive material in a conductive mounting part, when reducing thickness of an information display apparatus having a structure in which a connecting substrate is folded on a back side of an information display panel.SOLUTION: An information display panel module is configured so that a connecting substrate is folded and extended along a surface of a back side panel substrate, in the vicinity of a conductive mounting part, which is constructed so that a terminal part of a displaying electrode placed on an inside surface of one of a pair of panel substrates is connected to a terminal part of a connecting electrode placed on the connecting substrate, by means of an anisotropic conductive material. A backing member is provided to abut from inside at a curvature along the curvature of the folded part of the connecting substrate, and to abut between the surface of the back side panel substrate and the connecting substrate. The connecting substrate is fixed to the backing member across an area where the connecting substrate is extended along the surface of the back side panel substrate from the folded part, while the backing member is fixed to the surface of the back side panel substrate.

Description

  The present invention provides an information display in which a flexible connection substrate such as TCP (Tape Carrier Package) or FPC (Flexible Printed Circuit) used for connection to an external drive circuit is conductively bonded to a panel substrate of an information display panel. Regarding the panel module, in particular, when thinning the information display device in which the flexible connection substrate is folded back to the back side of the information display panel, poor conduction at the joint between the flexible connection substrate and the panel substrate Therefore, it is intended to improve the display quality.

  In order to display information on the information display panel, it is necessary to electrically control the display means. For this purpose, it is necessary to connect the information display panel to an external drive circuit that performs this electrical control. For the connection, a flexible connection substrate such as TCP or FPC is usually used. An assembly of the information display device can be improved by preparing an information display panel module in which a flexible connection substrate is joined to the information display panel.

  Here, the manufacturing procedure of the conventional information display panel module will be described with reference to FIGS. FIG. 1 is a plan view showing the overall configuration of a conventional information display panel module, and FIGS. 2A and 2B are cross-sectional views taken along lines AA and BB, respectively, of the information display panel module shown in FIG. FIG. 1 and 2, reference numeral 1 denotes an information display panel module, 2 is a display surface side panel substrate, 3 is a back side panel substrate, 4a and 4b are flexible connection substrates, and 5 is a display surface side panel. Display electrode terminal portion of the substrate, 6 is a display electrode terminal portion of the rear panel substrate, 7a and 7b are connection electrode terminal portions, 8a and 8b are ACF (Anisotropic Conductive Film), ACP (Anisotropic Conductive Paste), etc. Anisotropic conductive materials 9a and 9b are moisture-proof insulating materials. In addition, 10 and 11 are display electrodes, 12a and 12b are connection electrodes, 13 is a sealing material, 14 is a rib, and 15a and 15b are insulating coating materials for the connection electrodes.

  As shown in FIG. 1, the conventional information display panel module 1 has a pair of panel substrates 2 and 3 each having a rectangular shape, for example, so that a space for connecting a flexible connection substrate is open. They were joined together in a state of being arranged in parallel to each other. Then, one end of each of the flexible connection substrates 4a and 4b is bonded to the edge region on the inner surface of the panel substrates 2 and 3, respectively. The flexible connection substrates 4a and 4b are respectively folded back to the back side of the information display panel in the vicinity of the joints with the panel substrates 2 and 3, and the other ends thereof electrically connect the display means of the information display panel. Connected to an external drive circuit for controlling.

Further, as shown in FIG. 2A, a display electrode terminal portion 5 which is a terminal portion of the display electrode 10 is provided on the inner surface side of the display surface side panel substrate 2, and the display surface side connection substrate. A connection electrode terminal portion 7a, which is a terminal portion of the connection electrode 12a, was provided at one end of 4a. Then, the display electrode terminal portion 5 and the connection electrode terminal portion 7a are arranged to face each other, and an anisotropic conductive material 8a is inserted between these terminal portions and is crimped, so that these display electrode terminal portions 5 and The connecting electrode terminal portion 7a was connected to each other. A region formed by connecting the display electrode terminal portion 5 and the connection electrode terminal portion 7a with the anisotropic conductive material 8a is referred to as a “conductive mounting portion”. A region formed by connecting an electrode terminal portion 6 for display and a connection electrode terminal portion 7b, which will be described later, with an anisotropic conductive material 8b is also referred to as a “conductive mounting portion”. Further, the flexible connection substrate 4 a is folded in the vicinity of the connection portion (conductive mounting portion) and is disposed so as to extend along the surface of the back side panel substrate 3.
Furthermore, the electrode exposed portion of the display electrode terminal portion 5 and the electrode exposed portion of the connection electrode terminal portion 7a in the conductive mounting portion were covered with a moisture-proof insulating material 9a.

Further, as shown in FIG. 2B, a display electrode terminal portion 6 that is a terminal portion of the display electrode 11 is installed on the inner surface side of the back side panel substrate 3, and the back side panel substrate 3 is connected to the back side panel substrate 3. A connection electrode terminal portion 7b, which is a terminal portion of the connection electrode 12b, was installed at one end of the flexible connection substrate 4b. Then, the display electrode terminal portion 6 and the connection electrode terminal portion 7b are arranged to face each other, and an anisotropic conductive material 8b is inserted between these terminal portions and is crimped, whereby the display electrode terminal portions 6 and The connection electrode terminal portion 7b was connected to each other. Further, the flexible connection substrate 4 b is folded in the vicinity of the connection portion (conductive mounting portion) and is disposed so as to extend along the surface of the back-side substrate 3.
Furthermore, the electrode exposed portion of the display electrode terminal portion 6 and the electrode exposed portion of the connection electrode terminal portion 7b in the conductive mounting portion were covered with a moisture-proof insulating material 9b.

  For example, Patent Documents 1 to 3 are known as conventional documents that disclose an information display panel having a structure in which a flexible connection substrate is folded back to the back side of the information display panel as described above.

JP 2006-78622 A JP 2009-75498 A Japanese Patent No. 3764945

  However, in the conventional information display panel module 1 shown in FIGS. 1 and 2, since the elastic force to return to the folded portions of the flexible connection substrates 4a and 4b acts, it is folded back with a large curvature. In other words, the bent portion had a large bending diameter, that is, had to be folded with a small curvature. As a result, even when a thin information display panel is used, the information display panel module 1 when connected to an external drive circuit disposed on the back side of the information display panel becomes thick, and the information display panel This is an obstacle to making the information display device incorporating the thickness of the device thinner.

  Further, in the folded flexible connection substrates 4a and 4b, the region extending along the surface of the back substrate 3 has a direction different from the extending direction (for example, a direction perpendicular to the paper surface in FIG. 2). ) Torsional force acts between the display electrode terminal portions 5 and 6 and the connection electrode terminal portions 7a and 7b, so that the anisotropic conductive materials 8a and 8b connecting them are peeled off. That is, there is a case where poor conduction due to peeling of the anisotropic conductive material occurs in the conductive mounting part, and display defects are forced.

  Further, in the flexible connection substrate 4b to be joined to the back side panel substrate 3, the elastic force (indicated by an arrow in FIG. 2B) that tries to return to the original acting on the folded portion, In some cases, a conductive failure occurs due to peeling of the anisotropic conductive material in the conductive mounting portion, and a display failure may be forced.

  In addition, since the information display panel module disclosed in Patent Document 1 has a structure in which a flexible connection substrate is folded back along an end surface of a rear panel substrate (“element substrate” in Patent Document 1). The curvature of the folded portion is increased. Therefore, an excessive elastic force to return to the original acts, and there is a possibility that poor conduction due to peeling of the anisotropic conductive material may occur in the conductive mounting portion. In order to prevent this problem from occurring, it is conceivable to change the shape of the end face of the back side substrate, but in this case, there arises a problem that the manufacture of the back side panel substrate becomes complicated.

  In the information display panel module of the “electro-optical device” disclosed in Patent Document 2, a flexible connection substrate connected to the rear side panel substrate via an anisotropic conductive material (“Interface” in Patent Document 2). When the board ") is folded back, the curvature of the folded part is prevented from becoming excessive by sandwiching electronic components such as resistors and capacitors arranged on the flexible connection board inside the folded part. I have to. However, in this structure, it is necessary to extend a flexible connection substrate from the edge of the back side panel substrate in order to sandwich the electronic component, and the information display device incorporating the information display panel is made thin. There was room for improvement from the viewpoint of miniaturization.

  In the information display panel module disclosed in Patent Literature 3 (“Display Module” in Patent Literature 3), an anisotropic conductive material (“Patent” in Patent Literature 3) is used as the display surface side panel substrate (“substrate” in Patent Literature 3). When the flexible connection substrate ("flexible wiring board" in Patent Document 3) connected via the anisotropic conductive adhesive ") is folded back, the folded shape is formed on the inner peripheral side of the folded portion. By sticking a folding guide member for prescribing, the curvature of the folded portion is prevented from becoming excessive. However, in this structure, when a twist acts between the display surface side panel substrate and the flexible connection substrate as described above, conduction failure due to peeling of the anisotropic conductive material is caused in the conductive mounting portion. As a result, there was a risk that display defects would be forced.

  The present invention has been developed in view of the above-described present situation, and an information display panel module formed by bonding a flexible connection substrate to a panel substrate of an information display panel when the information display panel is incorporated in an information display device. In the case of thinning the information display device having a structure in which the flexible connection substrate is folded back to the back side of the information display panel, the occurrence of peeling of the anisotropic conductive material in the conductive mounting portion is avoided, thereby improving the display quality. An object is to propose an improved information display panel module.

That is, the gist configuration of the present invention is as follows.
1. A pair of panel substrates composed of a display surface side panel substrate and a back side panel substrate disposed opposite to each other;
Display means for displaying information by electrical control between the pair of panel substrates via display electrodes;
A flexible connection substrate for connecting the display electrode to an external drive circuit,
The display electrode terminal portion disposed on one inner surface of the pair of panel substrates and the connection electrode terminal portion disposed on the flexible connection substrate are arranged to face each other, and these display electrodes Connecting the terminal part of the terminal and the terminal part of the connecting electrode with an anisotropic conductive material,
In the vicinity of the conductive mounting portion having a structure in which the terminal portion of the display electrode and the terminal portion of the connection electrode are connected by an anisotropic conductive material, the flexible connection substrate is folded back to form a back panel substrate. In the information display panel module, which has a structure extending along the surface of
A backing member that abuts from the inside with a curvature along the curvature of the folded portion of the flexible connection substrate and abuts between the surface of the back panel substrate and the flexible connection substrate. ,
The flexible connection substrate is fixed to the backing member over a region where the flexible connection substrate extends from the folded portion along the surface of the back panel substrate. An information display panel module, wherein a backing member is fixed to the surface of the back panel substrate.

2. 2. The information display panel according to 1 above, wherein the flexible connection substrate and the backing member and the backing member and the back panel substrate are fixed by a bonding material. module.

3. In the above item 2, wherein the flexible connection substrate and the backing member are fixed by a bonding material, and the backing member and the back panel substrate are fixed by a slip prevention material. The information display panel module described.

4). In the conductive mounting portion, at least an electrode exposed portion of the terminal portion of the display electrode, an electrode exposed portion of the terminal portion of the connection electrode, and an end region of the flexible connection substrate are provided with a moisture-proof insulating material. 4. The information display panel module according to any one of 1 to 3, wherein the information display panel module is covered with

5. A pair of panel substrates composed of a display surface side panel substrate and a back side panel substrate disposed opposite to each other;
Display means for displaying information by electrical control between the pair of panel substrates via display electrodes;
A flexible connection substrate for connecting the display electrode to an external drive circuit,
In the vicinity of the conductive mounting portion having a structure in which the terminal portion of the display electrode and the terminal portion of the connection electrode are connected by an anisotropic conductive material, the flexible connection substrate is folded back to form a back panel substrate. In the information display panel module, which has a structure extending along the surface of
At least the back panel substrate is a flexible panel substrate,
The flexible panel substrate is folded back in the vicinity of the conductive mounting portion, and the flexible connection substrate is folded along the surface of the folded portion of the flexible panel substrate. An information display panel module characterized by being fixed with a bonding panel substrate and a bonding material.

6). In the conductive mounting portion, at least an electrode exposed portion of the terminal portion of the display electrode, an electrode exposed portion of the terminal portion of the connection electrode, and an end region of the flexible connection substrate are provided with a moisture-proof insulating material. 6. The information display panel module according to 5 above, wherein the information display panel module is covered with

  According to the first aspect of the invention, the curvature of the folded portion can be adjusted by the backing member that abuts from the inside with the curvature along the curvature of the folded portion of the flexible connection substrate. As a result, the information display panel The module can be thinned and incorporated in the information display device, and thus the information display device can be thinned. Further, even when a force in a direction different from the extending direction is applied to the region extending along the surface of the back side substrate of the folded flexible connection substrate, the surface of the back side panel substrate is applied. Since the flexible connecting substrate can be held by the fixed backing member, it is possible to avoid peeling of the anisotropic conductive material in the conductive mounting portion, thereby improving display quality. Even when a flexible connection board having a conductive mounting part formed on the back panel substrate is folded, the flexible connection board is bent at the same curvature as the backing member at the folded part. Thus, the elastic force acting on the folded portion and returning to the original state can be restrained. As a result, occurrence of peeling of the anisotropic conductive material in the conductive mounting portion can be avoided.

  According to the invention described in 4 above, in the conductive mounting portion, at least the electrode exposed portion of the terminal portion of the display electrode, the electrode exposed portion of the terminal portion of the connection electrode, and the end region of the flexible connection substrate are provided. By covering with a moisture-proof insulating material, the corrosion of the electrode due to moisture contained in the outside air is prevented, and the end region of the flexible connection substrate is constrained, and the folded portion of the flexible connection substrate is It is possible to achieve further restraint of the elastic force to return to the original acting force.

  According to the invention described in 5 above, the curvature of the folded portion of the flexible connection substrate can be adjusted by the folded portion of the flexible back panel substrate, and as a result, the information display panel module is thinned. Thus, the information display device can be incorporated, and the information display device can be made thin. Further, even when a force in a direction different from the direction in which the flexible connection substrate extends is applied to the folded region of the flexible connection substrate, the flexible connection substrate is folded back. Since the flexible connection substrate can be held by the back side panel substrate in which the region is fixed, it is possible to avoid occurrence of peeling of the anisotropic conductive material in the conductive mounting portion and to improve display quality. Further, by bending and fixing the flexible connection substrate with the same curvature as that of the back side panel substrate, it is possible to restrain the elastic force to return to the original acting on the folded portion. As a result, occurrence of peeling of the anisotropic conductive material in the conductive mounting portion can be avoided.

  According to the invention described in 6 above, in the conductive mounting portion, at least the electrode exposed portion of the terminal portion of the display electrode, the electrode exposed portion of the terminal portion of the connection electrode, and the end region of the flexible connection substrate are provided. By covering with a moisture-proof insulating material, the corrosion of the electrode due to moisture contained in the outside air is prevented, and the end region of the flexible connection substrate is constrained, and the folded portion of the flexible connection substrate is It is possible to achieve further restraint of the elastic force to return to the original acting force.

It is a top view which shows the whole structure of the conventional information display panel module. (A) And (b) is respectively AA sectional drawing and BB sectional drawing of the conventional information display panel module shown in FIG. (A) And (b) is a figure which shows an example of the information display panel used for this invention. It is a figure for demonstrating typical embodiment of the information display panel module which concerns on this invention. (A) is sectional drawing which shows the joining procedure of a display surface side panel board | substrate and a flexible connection board | substrate. (B) is sectional drawing which shows the joint point of a back side panel board | substrate and a flexible connection board | substrate. It is sectional drawing of the backing member which shows the modification of the backing member used for the information display panel module according to typical embodiment of this invention. It is a figure for demonstrating the modification of embodiment of the information display panel module which concerns on this invention. (A) is a top view which shows the whole structure of the information display panel module in this example. (B) is CC sectional drawing of (a).

Hereinafter, the present invention will be specifically described.
(Basic configuration of information display panel used in the present invention)
First, a basic configuration of the information display panel used in the present invention will be described with reference to FIG. In addition, about the structure same as the structure shown in FIG. 1, FIG. 2, the same code | symbol is attached | subjected and shown.
The display means of the information display panel used in the present invention is not particularly limited as long as it is a display means for displaying information by electrical control between a pair of panel substrates, and various known systems can be used. . Hereinafter, a particle group having optical reflectivity and chargeability disposed between a pair of panel substrates is used as a display medium, and an electric field electrically controlled between display electrodes disposed on each of the panel substrates is displayed on the display medium. A case where a method of displaying information by moving the display medium by using the above is described.

  In the example shown in FIGS. 3A and 3B, the information display panel used in the present invention is a particle group including particles having at least optical reflectivity and chargeability, and the optical reflectivity and the charge are mutually charged. At least two types of display media having different characteristics (here, a white display medium 16W configured as a particle group including negatively charged white particles 16Wa and a black display medium 16B configured as a particle group including positively charged black particles 16Ba) Are disposed in each cell formed by the partition walls 17 between the panel substrates, and the display electrode 10 (striped electrode) provided on the panel substrate 2 and the display electrode 11 (striped electrode) provided on the panel substrate 3 Are moved between the panel substrate 2 and the panel substrate 3 in accordance with an electric field generated by applying a voltage to a pixel electrode pair formed by opposing intersections (preferably opposing orthogonal intersections). That. Then, the white display medium 16W is visually recognized by the observer as shown in FIG. 3A, or the black display medium 16B is visually recognized by the observer as shown in FIG. 3B. Are displayed in a matrix with black and white dots. In addition, in FIG. 3 (a), (b), the partition in front is abbreviate | omitted. In addition, the panel substrate 2 on the observation side of the panel substrates 2 and 3 and the display electrodes provided on the panel substrate 2 are each made of a material having at least an information display screen area.

  Note that the information display panel used in the present invention has a display electrode provided on the back side panel substrate as a pixel electrode with a TFT instead of the passive drive method shown in FIGS. 3 (a) and 3 (b). Needless to say, the active drive method may be used.

(Typical embodiment of the information display panel module according to the present invention)
Next, a typical embodiment of the information display panel module according to the present invention will be described with reference to FIG. Since the structure is the same as that shown in FIGS. 1 and 2, the same components are denoted by the same reference numerals. FIG. 4A is a cross-sectional view showing a procedure for joining the display surface side panel substrate and the flexible connection substrate of the information display panel module in this example. FIG. 4B is a cross-sectional view showing a procedure for joining the back panel substrate and the flexible connection substrate of the information display panel module in this example.
4A and 4B, reference numeral 19 denotes an information display panel module, 20a and 20b are backing members, and 21a, 21b, 22a and 22b are bonding materials. Reference numerals 20a-1 and 20b-1 denote folding contact portions of the backing member, and 20a-2 and 20b-2 denote sheet-like portions of the backing member.

As shown in FIG. 4, the information display panel module 19 according to this example abuts from the inside with a curvature along the curvature of the folded portion of the flexible connection substrates 4 a and 4 b, and the back side panel substrate 3. It is characterized in that it includes backing members 20a and 20b that abut between the surface and the flexible connection substrates 4a and 4b.
Here, the backing members 20a and 20b are configured by folded contact portions 20a-1 and 20b-1 and sheet-like portions 20a-2 and 20b-2 having a flat plate shape.

The folded contact portions 20a-1 and 20b-1 are formed to have a thickness greater than that of the sheet-like portions 20a-2 and 20b-2.
Further, the side surfaces of the folded contact portions 20a-1 and 20b-1 have a curved surface shape with a predetermined curvature, as shown in FIG.

Here, as the curvature, D1 is a length equivalent to the diameter (μm) of a backing member used when a flexible connection substrate is mounted on the display surface side substrate, and D2 is flexible on the back side substrate. When the length corresponding to the diameter (μm) of the backing member used when mounting the connection board is set, it is preferable that D1 and D2 satisfy the following expression.
D1≈d + t ₂ + t ₅ + t ₁ −φ−t ₃ −t ₄
D2≈φ + t ₂ + t ₅ + t ₁ −t ₄
Where d: Gap between panel substrates (μm)
φ: Particle size (μm) of conductive particles in anisotropic conductive material
t ₁ : thickness of the sheet-like portion of the backing member (μm)
t ₂ : thickness of back panel substrate (μm)
t ₃ : thickness of flexible connection substrate (μm)
t ₄ : Thickness (μm) of the bonding material formed on the folded contact portion
t ₅ : thickness of the bonding material formed on the back panel substrate surface (μm)
Here, the thickness of the electrode of the display electrode terminal portion and the thickness of the electrode of the connection electrode terminal portion of the flexible connection substrate are the gap d between the panel substrates and the thickness t _{2 of the} rear panel substrate. Therefore, the thickness is not taken into consideration.

  In this example, using the backing members 20a and 20b described above, connection between the connection electrode terminal portions 7a and 7b of the flexible connection substrates 4a and 4b and the display electrode terminal portions 5 and 6 of the panel substrate is performed. The flexible connection substrates 4 a and 4 b are folded back and extended along the surface of the back side panel substrate 3 in the vicinity of the portion, that is, the conductive mounting portion. Here, the vicinity of the conductive mounting portion means a region that is at least 1 mm away from the joint portion where the anisotropic conductive material is formed. This is because the anisotropic conductive material may be easily peeled off when folded in a region close to the joint where the anisotropic conductive material is formed, that is, a region closer than 1 mm. In addition, if the portion where the flexible connecting substrate is folded away from the joint portion where the anisotropic conductive material is formed, the outer area of the information display screen, that is, the frame portion becomes large, which hinders downsizing of the information display device. Therefore, it is preferable not to exceed 10 mm.

Further, at the time of folding, the bonding members 4a and 4b are bonded to the backing members 20a and 20b over the region extending from the folded portion along the surface of the back side panel substrate 3. The backing members 20a and 20b are fixed to the surface of the rear panel substrate 3 using a bonding material.
As shown in FIG. 4, the flexible connection substrates 4a and 4b are fixed to the backing members 20a and 20b by bonding materials 21a, 21b, 22a, and 22b such as adhesives, adhesives, and double-sided tapes. It is preferable to carry out by.
Further, the backing members 20a and 20b may be fixed to the surface of the back side panel substrate 3 by using an anti-slip material instead of the bonding materials 22a and 22b. The above fixing functions sufficiently if the sheet-like portions 20a-2 and 20b-2 of the backing members 20a and 20b do not slide without moving with respect to the surface of the back side panel substrate 3.
In addition, the bonding material and the anti-slip material arranged on the surface of the back side panel substrate 3 can be used as a buffer layer that absorbs an external impact on the information display panel. In addition, a material having excellent buffering properties is selected and used. A material excellent in adhesiveness and anti-slip property has an advantage that it is a material excellent in shock-absorbing properties since it has a large internal loss.
The bonding material used when the flexible connection substrates 4a and 4b are fixed to the backing members 20a and 20b needs to be securely fixed to each other, and therefore is formed with a thickness of 1 μm to 10 μm. Is preferred. Necessary and sufficient adhesive force can be secured by setting the thickness to be formed within this range.
On the other hand, the bonding material and the anti-slip material used when fixing the backing members 20a and 20b to the surface of the back panel substrate 3 have a thickness in the range of 1 μm to 10 μm as long as sufficient fixing property is obtained. However, in order to obtain sufficient buffering properties, it is preferable to form it as thick as possible. Actually, if it is formed too thick, it is difficult to obtain a thin information display device. Therefore, it is formed in the range of 10 μm to 1000 μm. In this range, a necessary and sufficient buffer function can be obtained, and a practically thin information display device can be obtained.

The backing members 20a and 20b are not limited to the solid structure as shown in FIG. 4, and can take various structures. For example, a hollow structure can be used as shown in FIG. 5A, or a single sheet-like member can be folded at one end as shown in FIG. 5B. In the case of the latter structure, in order to maintain the shape of the folded region of the sheet-like member, the stress generated by the distortion at the time of folding is removed, or an adhesive or the like is inserted and fixed to the inner side surface of the folding. It is preferable.
Examples of the material of the backing members 20a and 20b include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polymethyl methacrylate (PMMA), polyethersulfone (PES), polyurethane, Examples thereof include resins such as polyamide, polyimide, polystyrene, polyethylene, and polypropylene, epoxy resins reinforced with glass fibers and carbon fibers, stainless steel (SUS), copper, and aluminum.

In this example, as shown in FIGS. 4A and 4B, at least the electrode exposed portions of the display electrode terminal portions 5 and 6 and the connection electrode terminal portions 7a and 7b in the conductive mounting portion. It is preferable to cover the electrode exposed portions and end regions 4a-1 and 4b-1 of the flexible connection substrates 4a and 4b with moisture-proof insulating materials 9a and 9b. In FIGS. 4A and 4B, the moisture-proof insulating materials 9a and 9b are formed so as to enter the gap between the backing members 20a and 20b and the end portion of the back side panel substrate 3. This contributes to fixing the abutting members 20a, 20b and the back side panel substrate 3.
At that time, the moisture-proof insulating materials 9a and 9b arranged in the conductive mounting portion cover the entire portion where the flexible connection substrates 4a and 4b connected to the panel substrate protrude outward from the back side panel substrate 3. It is more preferable that it is formed so as to increase the reinforcement. The moisture-proof insulating materials 9a and 9b not only prevent corrosion of the exposed electrodes, but also return the flexible connection substrates 4a and 4b acting on the folded portions of the flexible connection substrates 4a and 4b. This is because the elastic force to be restrained can be further restricted, and separation of the anisotropic conductive materials 8a and 8b can be effectively prevented.

  According to the information display panel module 19 according to the present embodiment described above, flexibility is provided by the backing members 20a and 20b that contact from the inside with a curvature along the curvature of the folded portion of the flexible connection substrates 4a and 4b. The curvatures of the folded portions of the connection substrates 4a and 4b can be adjusted. As a result, the information display panel module 19 can be made thin and incorporated in the information display device. Further, even when a force in a direction different from the extending direction is applied to the region in which the folded flexible connection substrates 4 a and 4 b extend along the surface of the back panel substrate 3, Since the flexible connection substrates 4a and 4b can be held by the backing members 20a and 20b fixed to the surface of the panel substrate 3, the occurrence of peeling of the anisotropic conductive materials 8a and 8b in the conductive mounting portion is avoided. Thus, the display quality can be improved. Even when the flexible connection substrate 4b joined to the back panel substrate 3 is folded back to the back side of the back panel substrate 3, the flexible connection substrate 4b is supported by the backing member at the folded portion. By bending and fixing with the same curvature as 20b, it is possible to restrain the elastic force that the flexible connection substrate 4b acting on the folded portion of the flexible connection substrate 4b tries to return to its original state. As a result, occurrence of peeling of the anisotropic conductive material 8b in the conductive mounting portion can be avoided.

(Modification of Embodiment of Information Display Panel Module According to the Present Invention)
Next, a modification of the embodiment of the information display panel module according to the present invention will be described with reference to FIG. In addition, about the structure same as the structure shown to FIGS. 1-4, the same code | symbol is attached | subjected and shown. FIG. 6A is a plan view showing the entire configuration of the information display panel module in this example. FIG. 6B is a cross-sectional view taken along the line CC in FIG.
6A and 6B, reference numeral 23 denotes an information display panel module. Reference numeral 24 denotes an inter-substrate conductive portion made of an anisotropic conductive material such as ACF, ACP, ACS, and 25 denotes an inter-substrate conductive portion 24. The electrode terminal portion 3 ′ connected to the display electrode of the display surface side panel substrate via the back side panel substrate, and 3′-1 indicates the folded region of the back side panel substrate.

In the information display panel module 23 according to this example, the back panel substrate is a flexible panel substrate 3 ′, and as shown in FIG. 6B, the flexible back panel substrate 3 ′ is displayed. Folded back to the back side of the information display panel in the vicinity of the conductive mounting portion, which is a connection portion between the electrode terminal portion 6 and the connection electrode terminal portion 7b, and on the surface of the folded portion of the flexible rear panel substrate 3 ′. The flexible connection substrate 4b is folded back along with the flexible back-side panel substrate 3 ′ and fixed.
Here, the flexible connection substrate 4b and the flexible rear panel substrate 3 ′ are fixed by a bonding material 21b such as an adhesive, an adhesive, and a double-sided tape as described above. Is preferred.

  Further, when stress due to distortion generated at the time of folding remains in the folded portion of the flexible back side panel substrate 3 ′, a force for returning to the original acts and the flexible back side The curvature of the turn-back of the panel substrate 3 ′ is small, that is, the length corresponding to the diameter of the bent portion becomes long, which hinders the information display panel module from being thin and assembling the information display device. For this reason, the length corresponding to the diameter of the bent portion is removed by removing the stress generated by the distortion at the time of folding the flexible back side panel substrate 3 ′ or by inserting an adhesive or the like on the inner side surface of the folding. Is preferably fixed.

Regarding the curvature of the folded portion of the flexible back side panel substrate 3 ′, when the length corresponding to the diameter of the curvature portion is D2, this D2 is the thickness t of the flexible back side panel substrate 3 ′. _{About 2} times 2, that is, D2≈2 × t ₂ . In accordance with the thickness of the electronic circuit board to which the connection electrode terminal portion at the other end of the folded flexible connection substrate 4b is connected, D2 ≧ 2 × t ₂ can be satisfied.
Moreover, it is preferable that the depth (length in the left-right direction in FIG. 6) of the folding region 3′-1 of the flexible rear panel substrate is 10 mm or more.
Since the electronic circuit board provided with the external drive circuit for connecting the information display panel module is arranged on the back side of the information display panel, the depth of the folded region 3′-1 of the flexible back side panel board is too long. Therefore, it is preferable to keep the depth of the folded region 3′-1 within 30 mm.

  According to the information display panel module 23 according to the present embodiment which is a modified example of the present invention described above, the folded portion of the flexible connection substrate 4b is formed by the folded portion of the flexible back panel substrate 3 ′. As a result, the information display panel module 23 can be thinned to obtain a thin information display device. Even if a force in a direction different from the direction in which the flexible connection substrate 4b extends is applied to the folded region of the flexible connection substrate 4b, the flexible connection substrate 4b Since the flexible connection substrate 4b can be held by the back side panel substrate 3 ′ to which the folded region is bonded, it is possible to avoid the occurrence of poor conduction due to the peeling of the anisotropic conductive material 8b in the conductive mounting portion. Therefore, display quality can be improved. In addition, the flexible connection substrate 4b is bent and fixed with the same curvature as that of the rear panel substrate 3 ′, so that the flexible connection substrate 4b acting on the folded portion is returned to the original state. Elastic force can be restrained. As a result, occurrence of peeling of the anisotropic conductive material 8b in the conductive mounting portion can be avoided.

(General components used in the information display panel module of the present invention)
Hereinafter, general components used in the information display panel module of the present invention will be described.
As described above, the anisotropic conductive material is, for example, ACF, ACP, or ACS, and includes conductive particles in a film-like or paste-like bonding material. Anisotropic conductive materials containing conductive particles with a particle size of 3 μm to 10 μm are common, but anisotropic conductive materials containing conductive particles with a particle size of 10 μm to 50 μm have also been developed. Yes.
The film-like or paste-like bonding material is cured to develop mechanical bonding strength, and the conductive particles develop electric connection between the opposing electrode terminals. If the gap between the electrode terminals of the connecting electrode terminals formed in a stripe shape is not larger than the particle diameter of the conductive particles, leakage occurs between the adjacent electrode terminals due to the conductive particles arranged between the adjacent electrode terminals. There is a risk. Therefore, it is important to use an anisotropic conductive material including conductive particles having an appropriate particle size in consideration of the gap between adjacent electrode terminals of the electrode terminal portion for connection. When designing an information display panel module, if the gap between adjacent electrode terminals of the connection electrode terminal portion is set to be three times or more the particle diameter of the conductive particles contained in the anisotropic conductive material, leakage is less likely to occur. Further preferred.

As the moisture-proof insulating material, a material that has at least moisture permeation resistance, flexibility, insulation, and migration resistance and adheres to the panel substrate, the electrode terminal portion, and the flexible connection substrate can be used.
A silicone resin, an acrylic resin, or an epoxy resin, which is any one of a solvent removal curing system, a humidity curing system, and an ultraviolet curing system, can be used.
The moisture-proof insulating material can be disposed by a method such as dispensing or spray coating.
The physical properties of the moisture-proof insulating material are more preferably as follows from the viewpoint of ease of manufacture and reliability after being incorporated into a product.
・ Viscosity 0.1 ～ 10 Pa ・ s (25 ℃)
・ Curing conditions: 500 mJ to 2500 mJ for UV curing systems
In the case of humidity curing system and solvent removal curing system, 25 ° C, 6 hours to 30 hours, volume resistance 1.0 × 10 ¹³ Ω / m to 1.0 × 10 ¹⁶ Ω / m
・ Moisture permeability: 1000 g / m ²・ 24 h or less ・ Ion concentration: Na ion and Cl ion: 10 ppm or less

  As the display surface side panel substrate, a substrate having at least a transparent information display screen area is used. The thickness of the display surface side panel substrate is preferably in the range of 25 μm to 1000 μm, but in order to obtain a thin information display panel, the range of 25 μm to 500 μm is preferable, and further, the thickness of 25 μm to 200 μm. A range is preferred. As the display surface side panel substrate, a glass substrate can be used in addition to a plastic substrate such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide, polyethylene sulfonate (PES).

The back panel substrate may be a transparent substrate or a non-transparent substrate. The thickness of the back side panel substrate is preferably in the range of 25 μm to 1000 μm, but in order to make a thin information display panel, the range of 25 μm to 500 μm is preferable, and further, the range of 25 μm to 200 μm. Is preferred. As the back panel substrate, organic polymer materials such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polycarbonate (PC), polyimide (PI), polyethersulfone (PES), acrylic, etc. A sheet, a glass substrate, a metal substrate whose surface is covered with an insulating film, or the like is used.
When the back side panel substrate is folded back and used as a backing member that serves as a folding guide for the flexible connection substrate, the back side panel substrate is a flexible substrate that can be folded back. In this case, the above-described plastic substrate or metal substrate is preferably used.

  In order to obtain an information display panel that can be bent as a whole, the panel substrate needs to have flexibility. In this case, among the panel substrates described above, a flexible (flexible) substrate such as a plastic substrate, a metal substrate, or a glass substrate having a thickness of 200 μm or less is used. As the flexible substrate, a plastic substrate or a metal substrate is preferable, but a glass substrate is also preferable if the thickness is 200 μm or less because flexibility (flexibility) can be obtained. In the case of a plastic substrate, flexibility (flexibility) can be obtained by setting the thickness to 5000 μm or less.

  In the display electrode (pixel electrode) arranged to face the information display screen region, a transparent electrode is provided in the transparent information display screen region of the display surface side panel substrate. Transparent electrode materials include indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, and conductive zinc oxide. Transparent conductive metal oxides such as polyaniline, polyaniline, polypyrrole, and transparent conductive polymers including polythiophene such as Poly (3,4-ethylenedioxythiophene) -poly (Sstyrenesulfonate) (PEDOT: PSS). The thickness of the electrode provided in the information display screen region is preferably 0.01 μm to 10 μm, more preferably 0.05 μm to 5 μm, as long as electrical conductivity can be ensured and light transmittance is not hindered.

  In the display electrode (pixel electrode) disposed opposite to the information display screen region, the electrode provided on the back side panel substrate is indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped. Conductive metal oxides such as zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, conductive zinc oxide, polyaniline, polypyrrole, Poly (3, 4-ethylenedioxythiophene) -poly (Styrenesulfonate) (PEDOT : PSS) and other conductive polymers such as gold, silver, copper, aluminum, nickel and chromium, and alloys containing these conductive metals as main components. The pixel electrode provided in the information display screen area of the rear panel substrate may be transparent or may not be transparent. Further, the thickness of the pixel electrode provided in the information display screen area on the back side is only required to ensure conductivity, and is set in a range of 0.01 μm to 10 μm. The pixel electrode, the wiring electrode extending from the pixel electrode, and the conductive film constituting the connection electrode terminal portion can be formed of the same conductive metal material. For example, after the copper thin film is formed on the back side substrate, patterning may be performed on each electrode, and the above three members can be formed at the same time.

  As a method for forming an electrode, a method of forming the above-described material into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, a method of laminating a metal foil (for example, rolled copper foil), A method in which a conductive agent is mixed with a solvent or a synthetic resin binder and applied. The above-mentioned material that can be patterned and is electrically conductive can be preferably used.

Examples of the present invention will be described below.
In the invention example and the comparative example, a black and white two-color display medium (particle group A, particle group B) having different charging characteristics was used as the display medium.

  Particle group A is composed of 60 parts by weight of methyl methacrylate monomer (Kanto Chemical Reagent) and 40 parts by weight of ethylene glycol dimethacrylate (Wako Pure Chemical Reagent) as a polyfunctional monomer having a plurality of polymerization reactive groups in one molecule. mol%), 3 parts by weight of a nigrosine compound (Bontron N07: manufactured by Orient Chemical) as a positively charge control agent, and 5 parts by weight of carbon black (special black: manufactured by Degussa) as a black pigment are dispersed by a sand mill. (Acrylic and methacrylic) Resin-Hydrocarbon-based resin block copolymer (Modiper F600: manufactured by Nippon Oil & Fats) 5 parts by weight was dissolved, and further 2 parts by weight of lauryl peroxide (Perroyl L: manufactured by Nippon Oil & Fats) was dissolved. The resulting solution was used as a surfactant for polyoxyethylene alkyl ether sodium sulfate (late (Lu E-118B: manufactured by Kao) was suspended in 0.5% purified water, polymerized, filtered and dried, and the average particle size was 9.2 μm using a classifier (MDS-2: Nippon Pneumatic Industry). This is obtained as a group of positively charged black particles.

  Particle group B consists of 100 parts by weight of polymethylpentene polymer (TPX-R18; manufactured by Mitsui Chemicals), 100 parts by weight of titanium dioxide (Taipaque CR-90: manufactured by Ishihara Sangyo Co., Ltd.) as a colorant, and negative charge control. 5 parts by weight of a phenol-based condensate (Bontron E89: manufactured by Orient Chemical Co., Ltd.) is melt-kneaded with a twin-screw kneader and finely pulverized with a jet mill (Lab Jet Mill IDS-LJ type: manufactured by Nippon Pneumatic Co., Ltd.). Obtained by classifying with a classifier (MDS-2: Nihon Numatic Kogyo) and melt spheronizing with a melt spheronizer (MR-10: Nihon Numatic Kogyo) This is a group of negatively charged white particles having a diameter of 9.5 μm.

Using the display medium described above, a glass information display panel and a PET information display panel were produced.
The glass information display panel was produced in the following manner. That is, two glass substrates (thickness 700 μm) on which ITO stripe electrodes (thickness 0.1 μm, width 300 μm) are formed at a pitch of 20 μm are opposed to each other with a gap of 50 μm between the substrates so that the stripe electrodes are orthogonal to each other. A white particle group including negatively charged white particles and a black particle group including positively charged black particles were arranged as display media between the substrates.

  Moreover, the information display panel made from PET was produced in the following manner. In other words, a polyethylene terephthalate (PET) substrate (thickness of display surface side 125 μm) on which ITO stripe electrodes (thickness 0.1 μm, width 300 μm) are formed at a pitch of 20 μm and ITO stripe electrodes (thickness 0.1 μm, width 300 μm) A polyethylene terephthalate (PET) substrate (thickness on the back side: 200 μm) formed at a pitch of 20 μm is opposed with a gap of 50 μm between the substrates so that the stripe electrodes are orthogonal, and negatively charged white particles are included between the PET substrates. The white particle group and the black particle group containing the positively charged black particles were arranged as a display medium.

For each of the glass information display panel and the PET information display panel described above, a conductive mounting portion for joining a flexible connection substrate was formed in the following manner.
Electrode terminal portions (thickness 0.1 μm, width 300 μm, pitch 20 μm) for forming conductive mounting portions were provided on one side of the display surface side substrate. This electrode terminal part was provided by extending the ITO stripe electrode for display as it was outside the information display screen area.
Next, a flexible connection substrate (FPC substrate) was prepared in which electrode terminal portions for forming conductive mounting portions were formed in one side region on a polyimide film having a thickness of 25 μm having wiring electrodes. The wiring electrode is a copper electrode with a thickness of 12 μm and is provided in a line-shaped L shape. One side is an electrode terminal portion for conductive mounting with an information display panel (width 300 μm, space 20 μm, thickness The other side is an electrode terminal portion for conductive mounting with an external drive circuit.
Between the flexible connection substrate and the display surface side substrate described above, a conductive mounting portion was formed using an anisotropic conductive material (ACF). As the ACF, FP1708E (conductive particle diameter: 3.5 μm) manufactured by Sony Chemical & Information Device was used.

An electrode terminal portion was provided on one side of the back side substrate in the same manner as in the case of the display side substrate.
Next, the flexible connection substrate was prepared in the same manner as the display surface side substrate except that the wiring electrodes were provided in a straight line and not in a line L shape. .
Then, a conductive mounting portion was formed in the same manner as in the case of the display surface side substrate.

  For each of the glass information display panel module and the PET information display panel module prepared as described above, a backing member and a moisture-proof insulating material were arranged in the following manner to obtain Invention Examples 1 to 4.

(Invention Example 1)
A PET backing member having a structure shown in FIG. 5B in which the sheet-like portion is 125 μm thick and the diameter equivalent length D1 of the curvature portion is 835 μm with respect to the conductive mounting portion of the display surface side glass substrate. Arranged.
A PET backing member having a structure shown in FIG. 4 (b) in which the sheet-like part is 125 μm thick and the diameter equivalent length D2 of the curvature part is 829 μm thick with respect to the conductive mounting part of the rear glass substrate. Arranged.
-For the backing member, both the fixed surface to the back side panel substrate and the fixed surface to the flexible connection substrate are double-sided tape type acrylic adhesive SK Dyne 1872 (manufactured by Soken Chemical Co., Ltd.) ) Was placed.
-As the moisture-proof insulating material, SA3220 manufactured by Sony Chemical & Information Device Corporation was placed with a dispenser and cured using an ultraviolet irradiation spot lamp. The curing conditions were 1000 mJ / cm ² and elastic modulus after curing: 2.0 × 10 ⁸ Pa.

(Invention Example 2)
A PET backing member having a structure shown in FIG. 5B in which the sheet-like portion is 125 μm thick and the diameter equivalent length D1 of the curvature portion is 335 μm with respect to the conductive mounting portion of the display surface side PET substrate. Arranged.
A PET backing member having the structure shown in FIG. 4B, in which the sheet-like part is 125 μm thick and the diameter equivalent length D2 of the curvature part is 329 μm thick with respect to the conductive mounting part of the back side PET substrate. Arranged.
-The backing member, the bonding material, and the moisture-proof insulating material were formed in the same manner as in Invention Example 1.

(Invention Example 3)
A PET backing member having a structure shown in FIG. 5 (b) in which the sheet-like portion is 125 μm thick and the diameter equivalent length D1 of the curvature portion is 930 μm with respect to the conductive mounting portion of the display surface side glass substrate. Arranged.
A PET backing member having the structure shown in FIG. 4 (b) in which the sheet-like part is 125 μm thick and the diameter equivalent length D2 of the curvature part is 924 μm thick with respect to the conductive mounting part of the rear glass substrate. Arranged.
・ For the backing member, a 100 μm thick natural rubber film layer is used as an anti-slip material on the fixed surface with the back panel substrate, and a double-sided tape type is used as a bonding material on the fixed surface with the flexible connection substrate. Acrylic adhesive SK Dyne 1872 (manufactured by Soken Chemical Co., Ltd.) was arranged.
-The same moisture-proof insulating material as that of Invention Example 1 was formed in the same manner.

(Invention Example 4)
A PET backing member having a structure shown in FIG. 5B in which the sheet-like portion is 125 μm thick and the diameter equivalent length D1 of the curvature portion is 430 μm with respect to the conductive mounting portion of the display surface side PET substrate. Arranged.
-A PET backing member having the structure shown in FIG. 4B, in which the sheet-like part is 125 μm thick and the diameter equivalent length D2 of the curvature part is 424 μm thick, is placed on the conductive mounting part of the back side PET substrate. did.
-The backing member, the bonding material, the anti-slip material and the moisture-proof insulating material were formed in the same manner as in Invention Example 3.

Further, as Invention Examples 5 and 6, information display panel modules having the structure shown in FIG. 6A were manufactured in the following manner.
(Invention Example 5)
A glass substrate with a thickness of 700 μm was used as the display surface side substrate, and a PET substrate with a thickness of 125 μm was used as the back side substrate. On these two panel substrates, display stripe electrodes similar to the above-described panel substrate were formed. The display electrode on the display surface side is electrically connected between the substrates outside the information display screen area and is connected to the connection electrode terminal portion on the rear panel substrate. An ACF was disposed over the connection electrode terminal portion which is an end portion of the display electrode, and a conductive mounting portion with a flexible connection substrate was formed in the same manner as in the first invention example. (Refer to FIG. 6A.) However, the back side panel substrate (PET substrate) is provided with a folding region in advance to form a curvature portion that serves as a backing member when folding the flexible connection substrate. This was bonded to a display surface side panel substrate (glass substrate) to form an information display panel. A conductive mounting portion with a flexible connection substrate was formed on the back panel substrate of the information display panel thus formed. The depth of the folded region of the back side panel substrate (PET substrate) (the length in the left-right direction in FIG. 6B) was 10 mm.
-For the conductive mounting portion of the back side panel substrate, the diameter equivalent length D2 of the curvature portion in the folded region of the back side panel substrate was set to 250 μm.
The same bonding material as that of Invention Example 1 was formed in the same manner as that of Invention Example 1 on the fixing surface of the flexible connecting substrate and the bent back surface panel substrate and the folded region.
-The same moisture-proof insulating material as that of Invention Example 1 was disposed in the same manner. (See FIG. 6 (b))

(Invention Example 6)
-It replaced with the glass substrate used for the display surface side panel board | substrate in the invention example 5, and used the flexible connection board | substrate in the same way as the invention example 5 except having used the PET board | substrate similar to the invention example 1. A conductive mounting part was formed. (See Fig. 6 (a))
The same bonding material as that of Invention Example 1 was formed in the same manner as that of Invention Example 1 on the fixing surface of the flexible connecting substrate and the bent back surface panel substrate and the folded region.
The moisture-proof insulating material is the same moisture-proof insulating material as that of Invention Example 1 so as to cover the conductive mounting portion, the curved portion of the folded back side panel substrate, and the entire region up to the folded region. (See FIG. 6 (b))

In the manner described above, 100 information display panel modules of Invention Examples 1 to 6 are manufactured, connected to an external drive circuit board, and assembled into a housing to form an information display device, and then the information display device is operated. The white solid image and the black solid image were alternately displayed 10 times each in the information display screen area, and it was examined whether there was any defect in the display state.
The results are shown in Table 1.
Further, a moisture-proof insulating material is arranged in the glass information display panel module prepared as described above as shown in FIGS. 2 (a) and 2 (b), and a backing member is not arranged. It was set to 1. Further, a moisture-proof insulating material is arranged as shown in FIGS. 2 (a) and 2 (b) on the information display panel module made of PET prepared as described above, and a backing member is not arranged. 2. Moreover, it connected to the information display panel made from PET (refer FIG. 6 (a)) produced like Example 6 except having used the PET board | substrate which was prepared as mentioned above and the edge part was not turned back as a back side panel board | substrate. A comparative example 3 was prepared by arranging a moisture-proof insulating material as shown in FIG. 2 (b) on a PET information display panel module on which a mounting substrate was mounted, and not arranging a backing member.
After producing 100 information display panel modules of Comparative Example 1, Comparative Example 2, and Comparative Example 3 in the manner described above, connecting them to an external drive circuit board, and performing an operation as an information display device embedded in a housing Then, the information display device was operated to display the white solid image and the black solid image alternately 10 times each on the information display screen area, and it was examined whether there was any defect in the display state.
The results are shown in Table 1.

  Based on the above results, when the information display panel module of the present invention is connected to the external drive circuit board and incorporated into the housing to form a thin information display device, the flexible connection board is provided on the back side of the information display panel. Even if it is folded back, the occurrence of peeling of the anisotropic conductive material in the conductive mounting portion can be reliably avoided, and the display state does not fail due to poor conduction due to the peeling of the anisotropic conductive material in the conductive mounting portion. Since an information display panel module can be provided, it was confirmed that the information display device can be stably thinned.

An information display device in which the information display panel module of the present invention is incorporated in a thin shape by folding a flexible connection substrate on the back side of the information display panel is called a notebook personal computer, an electronic notebook, or PDA (Personal Digital Assistants). As information display devices for mobile devices such as portable information devices, mobile phones, handy terminals, etc., as electronic paper (information display devices) such as electronic books, electronic newspapers, electronic manuals (electronic instruction manuals), signs, posters, blackboards Bulletin boards such as whiteboards, electronic desk calculators, home appliances, automobile supplies, etc., as information display devices such as point cards, IC cards, etc., electronic advertisements, information boards, electronic POPs (Point Of Presence, Point of purchase advertising), electronic price tags, electronic shelf labels, electronic musical scores, and information display devices such as RF-ID devices In addition, it can be suitably used as various information display devices such as POS terminals, car navigation devices, and watches. In addition, a connector for connection with the external rewriting means is provided on the side surface, and when the display information is rewritten, the connector is electrically connected to the connector of the external rewriting means to rewrite the display information, and then the connector is connected. It is also suitably used as a rewritable electronic paper (information display device) that can be continuously displayed even after being separated.
As the driving method of the information display panel, various types of driving methods such as a passive matrix driving method and a static driving method that do not use a switching element in the panel itself, and an active driving method that uses a TFT element can be applied.

DESCRIPTION OF SYMBOLS 1 Information display panel module 2 Display surface side panel board | substrate 3 Back side panel board | substrate 3 'Flexible back side panel board | substrate 3'-1 Folding area | region 4a, 4b of flexible back side panel board | substrates For flexible connection Substrate 4a-1, 4b-1 End of flexible connecting substrate 5,6 Display electrode terminal portion 7a, 7b Connecting electrode terminal portion 8a, 8b Anisotropic conductive material 9a, 9b Moisture-proof insulating material 10 , 11 Display electrode 12a, 12b Connection electrode 13 Sealing material 14 Rib 15a, 15b Insulating coating material for connection electrode 19 Information display panel module 20a, 20b Backing member 20 ', 20''Backing member 20a-1 , 20b-1 Folding contact portion of backing member 20a-2, 20b-2 Sheet-like portion of backing member 21a, 21b, 22a, 22b Laminated material 23 Information display panel module

Claims (6)

A pair of panel substrates composed of a display surface side panel substrate and a back side panel substrate disposed opposite to each other;
Display means for displaying information by electrical control between the pair of panel substrates via display electrodes;
A flexible connection substrate for connecting the display electrode to an external drive circuit,
The display electrode terminal portion disposed on one inner surface of the pair of panel substrates and the connection electrode terminal portion disposed on the flexible connection substrate are arranged to face each other, and these display electrodes Connecting the terminal part of the terminal and the terminal part of the connecting electrode with an anisotropic conductive material,
In the vicinity of the conductive mounting portion having a structure in which the terminal portion of the display electrode and the terminal portion of the connection electrode are connected by an anisotropic conductive material, the flexible connection substrate is folded back to form a back panel substrate. In the information display panel module, which has a structure extending along the surface of
A backing member that abuts from the inside with a curvature along the curvature of the folded portion of the flexible connection substrate and abuts between the surface of the back panel substrate and the flexible connection substrate. ,
The flexible connection substrate is fixed to the backing member over a region where the flexible connection substrate extends from the folded portion along the surface of the back panel substrate. An information display panel module, wherein a backing member is fixed to the surface of the back panel substrate.   The information display according to claim 1, wherein the flexible connection substrate and the backing member and the backing member and the back panel substrate are fixed by a bonding material. Panel module.   2. The flexible connection substrate and the backing member are fixed by a bonding material, and the backing member and the back panel substrate are fixed by an anti-slip material. Information display panel module described in 1.   In the conductive mounting portion, at least an electrode exposed portion of the terminal portion of the display electrode, an electrode exposed portion of the terminal portion of the connection electrode, and an end region of the flexible connection substrate are provided with a moisture-proof insulating material. The information display panel module according to claim 1, wherein the information display panel module is covered with. A pair of panel substrates composed of a display surface side panel substrate and a back side panel substrate disposed opposite to each other;
Display means for displaying information by electrical control between the pair of panel substrates via display electrodes;
A flexible connection substrate for connecting the display electrode to an external drive circuit,
The terminal portion of the display electrode installed on the inner side surface of the back side panel substrate and the terminal portion of the connection electrode installed on the flexible connection substrate are arranged to face each other.
In the vicinity of the conductive mounting portion having a structure in which the terminal portion of the display electrode and the terminal portion of the connection electrode are connected by an anisotropic conductive material, the flexible connection substrate is folded back to form a back panel substrate. In the information display panel module, which has a structure extending along the surface of
At least the back panel substrate is a flexible panel substrate,
The flexible panel substrate is folded back in the vicinity of the conductive mounting portion, and the flexible connection substrate is folded along the surface of the folded portion of the flexible panel substrate. An information display panel module characterized by being fixed with a bonding panel substrate and a bonding material.   In the conductive mounting portion, at least an electrode exposed portion of the terminal portion of the display electrode, an electrode exposed portion of the terminal portion of the connection electrode, and an end region of the flexible connection substrate are provided with a moisture-proof insulating material. The information display panel module according to claim 5, wherein the information display panel module is covered with.

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