JP2013011770A - Information display panel module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the bond strength between a flexible panel substrate and a flexible connection substrate, thereby improving display quality.SOLUTION: An information display panel module is configured by connecting a terminal of a display electrode disposed on the rear surface of a first panel substrate with a terminal of a connection electrode disposed on a flexible connection substrate through an anisotropic conductive material. The connection substrate has substantially the same substrate width as the first panel substrate bonded with the connection substrate. A moisture-proof insulation material for covering an edge of the first panel substrate, an edge of the flexible connection substrate, and the display electrode terminal and the connection electrode terminal exposed from the anisotropic conductive material is formed over a side surface of the first panel substrate in the length exceeding the width of the first panel substrate. A moisture-proof insulation material is also formed in a gap part, which corresponds to both edge surface sides of the anisotropic conductive material, between the first panel substrate and the flexible connection substrate.

Description

  The present invention provides a flexible information display panel using a flexible panel substrate such as TCP (Tape Carrier Package) and FPC (Flexible Printed Circuit) used to connect the information display panel to an external drive circuit. In connection with the information display panel module formed by bonding the connection substrates, the bonding strength at the time of bonding the electrode terminal portions of the two flexible substrates is increased, and in particular, the bonding strength between the panel substrate and the connection substrate is increased. Therefore, it is intended to improve display quality.

  In recent years, information display panels employing flexible panel substrates have been used as display units for various information display devices. Such an information display panel is not only flexible but can be easily thinned, and the display portion can be formed at a desired position of the information display device by utilizing the thinness and flexibility. In addition, there are many advantages such that an information display device that can be bent as a whole can be obtained by devising other parts constituting the information display device and the structure of the housing.

  An information display panel employing the flexible panel substrate described above needs to be connected to an external drive circuit for displaying information, as in the case of a conventional information display panel. The flexible connection board is used. Then, by preparing in advance an information display panel module in which a connection substrate is joined to the information display panel, it is possible to improve the assembling workability of the information display device.

  Here, the manufacturing procedure of the conventional information display panel module will be described with reference to FIGS. 1A is a top perspective view of a main part of a conventional information display panel module, FIG. 1B is a bottom perspective view of the same part, and FIG. 2A and FIG. It is AA sectional drawing and BB sectional drawing of the information display panel module 1 shown to (a). 1 and 2, reference numeral 1 denotes an information display panel module, 2 and 3 are panel substrates, 4 is an FPC (connection substrate), 5 is a display electrode terminal portion, 6 is a connection electrode terminal portion, 7 is an anisotropic conductive material such as ACF (Anisotropic Conductive Film) or ACP (Anisotropic Conductive Paste), and 8 is a moisture-proof insulating material. In addition, 9 and 10 are display electrodes, 11 is a connection electrode, 12 is a sealing material, and 13 is a rib.

  As shown in FIGS. 1 and 2, in the conventional information display panel module 1, at least one of the pair of flexible panel substrates 2 and 3, on the back surface of the panel substrate 2 in the illustrated example, A display electrode terminal portion 5, which is a terminal portion of the display electrode 9 for controlling a display medium (not shown) disposed between the panel substrates 2 and 3, is installed, and the display electrode terminal portion 5 is flexible. It connected to the electrode terminal part 6 for a connection installed on the board | substrate 4 for property connection. The connection electrode terminal portion 6 is a terminal portion of the connection electrode 11 that forms a part of the flexible connection substrate 4. The display electrode terminal portion 5 and the connection electrode terminal portion 6 are connected to the anisotropic conductive material 7 as described above on the display electrode terminal portion 5 or the connection electrode terminal portion 6. It was done by crimping after placing it on any of the above.

  The moisture-proof insulating material 8 is formed so as to cover the display electrode terminal portions 5 and the connection electrode terminal portions 6 exposed on both sides of the anisotropic conductive material 7. A moisture-proof insulating material 8 is formed after the two substrates are bonded using the anisotropic conductive material 7, and the moisture-proof insulating material is formed on the edge 2 a of the panel substrate 2 and the edge of the flexible connection substrate 4. The material 8 was formed (see, for example, Patent Document 1 as a prior art document for covering a connection portion by an anisotropic conductive material with a moisture-proof insulating material).

That is, the moisture-proof insulating material 8 is in the gap between the edge 2 a of the panel substrate 2 and the surface of the flexible connection substrate 4, and the display electrode terminal portion 5 exposed outside the anisotropic conductive material 7. And the first portion 8a covering the connection electrode terminal portion 6, and the outside of the anisotropic conductive material 7 in the gap between the edge 2a of the flexible connection substrate 4 and the surface of the panel substrate 2. The display electrode terminal portion 5 and the connection electrode terminal portion 6 were structured to be composed of the second portion 8b.
The first portion 8a covers the display electrode terminal portion 5 and the connection electrode terminal portion 6 exposed outside the anisotropic conductive material 7, and the second portion 8b provides anisotropy. The electrode terminal portion is protected from external environmental moisture by covering the display electrode terminal portion 5 and the connection electrode terminal portion 6 exposed inside the conductive material 7.

JP 7-244291 A

  In the information display panel module, in order to make the information display device compact, the flexible connection substrate 4 is often folded back to the back side of the panel substrates 2 and 3 and assembled to the information display device. However, in the conventional structure shown in FIGS. 1 and 2, one of the anisotropic conductive materials 7 that conducts each other between the panel substrate 2 and the flexible connection substrate 4 during the folding operation. In some cases, the display part is peeled off, and display failure due to poor conduction is forced.

  In the flexible information display panel module employing the flexible panel substrate 2 and the flexible panel substrate 3, the flexible panel substrate 2 and the flexible connection substrate are assembled after the assembly. Even when a force that bends one of the four is applied, a part of the anisotropic conductive material 7 that conducts the panel substrate 2 and the connection substrate 4 is peeled off. As a result, a display defect may be caused due to a poor conduction.

Therefore, the inventors investigated the cause. As a result, the following knowledge was obtained.
1) The panel substrate 2 and the surface of the connection substrate 4 are not completely joined, and as shown in FIG. 2B, in particular, a flexible region that is a region where the connection electrode terminal portion is not formed. There are gaps at both side edges of the conductive connection substrate 4 (regions corresponding to both end faces of the anisotropic conductive material). Therefore, this gap becomes the starting point of peeling of the anisotropic conductive material 7.

2) In this respect, the gap (region corresponding to both end surfaces of the anisotropic conductive material) is not completely filled only by disposing the moisture-proof insulating material 8 over the entire width direction of the flexible connection substrate 4. However, if this gap is completely filled, it is considered that the bonding strength between the panel substrate 2 and the connection substrate 4 can be increased.

3) However, when the entire information display panel module is bent as a flexible information display panel module employing the flexible panel substrate 2 and the flexible panel substrate 3, a flexible connection substrate When the substrate width of 4 is shorter than the substrate width of the panel substrate 2 as shown in FIG. 1, the moisture-proof insulating material 8 is disposed over the entire width direction of the flexible connection substrate 4, and further In some cases, the anisotropic conductive material 7 may be peeled off even if the gap (region corresponding to both end surfaces of the anisotropic conductive material) is filled. The reason for this is that when the entire flexible information display panel module is bent, the flexible panel substrate 2 is first bent, and the influence of the flexible connection substrate 4 that has not yet been bent. Accordingly, it is considered that the force for peeling off the anisotropic conductive material 7 is concentrated between the panel substrate 2 and the anisotropic conductive material 7.
4) Although the formed moisture-proof insulating material is also considered to exhibit bonding strength, as shown in FIG. 1, the formation region has a substrate width of the flexible connection substrate 4 having a short width. It is conceivable that the bonding force is not sufficient because it remains long.

  Accordingly, as a result of intensive studies to solve the above problems, the inventors made the substrate width of the flexible connection substrate substantially the same as the substrate width of the panel substrate and exceeded the substrate width of the panel substrate. Then, a moisture-proof insulating material is formed over the side surface of the panel substrate, and the gap between the edge of the panel substrate and the surface of the flexible connection substrate is filled with the moisture-proof insulating material. The moisture-proof insulating material extends to the side surface of the flexible substrate and extends to the side surface of the flexible connecting substrate, and extends over the side surface of the flexible connecting substrate to the width of the panel substrate. The gap between the edge of the flexible connection substrate and the back surface of the panel substrate is filled with a moisture-proof insulating material, and the flexible connection is a region that contacts both side end surfaces of the anisotropic conductive material. Panel by filling the gap between the panel board and the panel board with moisture-proof insulating material. The bonding strength between the substrate and the flexible connection substrate can be remarkably improved. As a result, even when the flexible connection substrate is folded and connected to the drive circuit, the flexible connection substrate is flexible. It has been found that the anisotropic conductive material 7 can be prevented from peeling even when the entire information display panel module is bent.

  The present invention has been developed based on the above knowledge, and is a flexible information display panel module in which a flexible connection substrate is joined to an information display panel employing a flexible panel substrate. An object of the present invention is to propose an information display panel module in which the bonding strength between a flexible panel substrate and a flexible connection substrate is increased to improve display quality.

That is, the gist configuration of the present invention is as follows.
1. A pair of flexible panel substrates composed of a first panel substrate and a second panel substrate disposed opposite to each other;
Display means for displaying information by electrical control between the first and second panel substrates via display electrodes;
A flexible connection substrate for connecting the display electrode to an external drive circuit,
A terminal portion of a display electrode installed on the back surface of the first panel substrate which is one of the pair of flexible panel substrates; a terminal portion of a connection electrode installed on the flexible connection substrate; Is an information display panel module having a structure in which the terminal portions of the display electrodes and the terminal portions of the connection electrodes are connected by an anisotropic conductive material,
The flexible connection substrate has a substrate width substantially the same as that of the first panel substrate bonded to the substrate,
Moisture proof covering the edge of the first panel substrate, the edge of the flexible connection substrate, and the display electrode terminal portion and the connection electrode terminal portion exposed from the anisotropic conductive material An insulating material is formed over the side surface of the first panel substrate with a width exceeding the substrate width of the first panel substrate, and the first panel substrate is in contact with both end surfaces of the anisotropic conductive material. An information display panel module, characterized in that a moisture-proof insulating material is also formed in a gap between the flexible connection substrate.

2. The moisture-proof insulating material that covers the edge of the flexible connection substrate extends over the flexible connection substrate and has a length that is longer than the edge of the first panel substrate. 2. The information display panel module according to item 1, wherein the information display panel module is formed over a side surface of the first panel substrate with a width exceeding a substrate width of the first panel substrate.

3. The moisture-proof insulating material that covers the edge of the flexible connection substrate is further the total substrate width of the second panel substrate facing the first panel substrate joined to the flexible connection substrate. 3. The information display panel module as described in 1 or 2 above, wherein the information display panel module is formed over an end edge of the second panel substrate.

4). The moisture-proof insulating material that covers the edge of the flexible connection substrate and is formed over the edge of the second panel substrate is further extended to the surface of the second panel substrate. 4. The information display panel module as described in 3 above.

5). 5. The information according to claim 1, wherein the moisture-proof insulating material that covers an edge of the flexible connection substrate is further extended to the surface of the first panel substrate. Display panel module.

6). The information according to any one of 1 to 5 above, wherein the moisture-proof insulating material extends a region covering an edge of the first panel substrate to the surface of the first panel substrate. Display panel module.

7). A moisture-proof insulating material that covers the edge of the flexible connection substrate and a moisture-proof insulating material that covers the edge of the first panel substrate, which are extended to the surface of the first panel substrate. 7. The information display panel module as described in 5 or 6 above, wherein the information display panel module has an annular covering structure integrated with each other on the surface of the first panel substrate.

  According to the present invention, the flexible connection substrate has substantially the same substrate width as that of the first panel substrate bonded to the substrate, and the edge of the first panel substrate, the above-mentioned allowable substrate. The edge of the flexible connection substrate, the display electrode terminal portion exposed from the anisotropic conductive material, and the moisture-proof insulating material that covers the connection electrode terminal portion are formed on the substrate of the first panel substrate. A gap portion between the first panel substrate and the flexible connection substrate, which is formed over the side surface of the first panel substrate with a width exceeding the width, and which contacts both side end surfaces of the anisotropic conductive material. In addition, since the moisture-proof insulating material is formed, the exposed electrode terminal portion can be covered with the moisture-proof insulating material to protect it from moisture in the external environment. One of the flexible connection boards is bent Even when a force is exerted so that both the first panel substrate and the flexible connection substrate are bent, the display electrode terminal portion of the first panel substrate and the flexible electrode Peeling of the anisotropic conductive material formed between the connection electrode terminals of the connection substrate can be effectively prevented, and as a result, display quality can be improved.

  In addition, according to the present invention, the moisture-proof insulating material that covers the edge of the flexible connection substrate extends over the flexible connection substrate and reaches the edge of the first panel substrate. And a moisture-proof insulating material that covers the edge of the flexible connection substrate by forming over the side surface of the first panel substrate with a width exceeding the substrate width of the first panel substrate. And a moisture-proof insulating material covering the edge of the first panel substrate are obtained, and the display electrode terminal portion of the first panel substrate and the connection electrode of the flexible connection substrate are obtained. Peeling of the anisotropic conductive material formed between the terminal portions can be more effectively prevented, and as a result, display quality can be further improved.

  Further, according to the present invention, a moisture-proof insulating material covering the edge of the flexible connection substrate is further provided to the second panel facing the first panel substrate bonded to the flexible connection substrate. Since the flexible connection substrate can be bonded to the second panel substrate by the moisture-proof insulating material by forming the substrate over the entire width of the substrate over the edge of the second panel substrate. The peeling of the anisotropic conductive material formed between the display electrode terminal portion of the first panel substrate and the connection electrode terminal portion of the flexible connection substrate can be more effectively prevented, As a result, the display quality can be further improved.

  Further, according to the present invention, a moisture-proof insulating material that covers the edge of the flexible connection substrate and is formed over the edge of the second panel substrate is further provided on the surface of the second panel substrate. Since the bonding strength between the moisture-proof insulating material and the second panel substrate can be increased more effectively, the display electrode terminal portion of the first panel substrate and the flexible connection The anisotropic conductive material formed between the connection electrode terminal portions of the substrate can be more effectively prevented from peeling off, and as a result, the display quality can be further improved.

  Further, according to the present invention, the moisture-proof insulating material covering the edge of the flexible connecting substrate is further extended to the surface of the first panel substrate, so that the moisture-proof insulating material and the first panel are extended. Since the bonding strength with the substrate can be effectively increased, the anisotropic conductivity formed between the display electrode terminal portion of the first panel substrate and the connection electrode terminal portion of the flexible connection substrate The peeling of the material can be prevented more effectively, and as a result, the display quality can be further improved.

  Further, according to the present invention, the moisture-proof insulating material and the first panel are extended by the moisture-proof insulating material so as to extend the region covering the edge of the first panel substrate to the surface of the first panel substrate. Anisotropy formed between the display electrode terminal portion of the first panel substrate and the connection electrode terminal portion of the flexible connection substrate because the bonding strength with the substrate can be further effectively increased. The peeling of the conductive material can be further effectively prevented, and as a result, the display quality can be further improved.

  Furthermore, according to the present invention, the moisture-proof insulating material that covers the edge of the flexible connection substrate and the moisture-proof property that covers the edge of the first panel substrate are extended to the surface of the first panel substrate. By forming an annular covering structure in which the insulating material is connected and integrated with each other on the surface of the first panel substrate, the bonding strength between the flexible connection substrate and the first panel substrate by the moisture-proof insulating material is increased. Since it can be further effectively enhanced, the anisotropic conductive material formed between the display electrode terminal portion of the first panel substrate and the connection electrode terminal portion of the flexible connection substrate is further peeled off. This can be effectively prevented, and as a result, the display quality can be further improved.

(A) is a principal part upper perspective view of the conventional information display panel module, (b) is a principal part lower perspective view similarly. (A) And (b) is respectively AA sectional drawing and BB sectional drawing of the information display panel module shown to Fig.1 (a). (A) And (b) is a figure which shows an example of the information display panel used for this invention. (A) And (b) is a figure which shows the other example of the information display panel used for this invention. It is a figure which shows the further another example of the information display panel used for this invention. It is a figure which shows the further another example of the information display panel used for this invention. It is a figure which shows the whole structure of embodiment of the information display panel module which concerns on this invention. (A) And (b) is the principal part upper perspective view and principal part lower perspective view which respectively show the junction part of the panel board | substrate and connection board | substrate of the information display panel module shown in FIG. (A) And (b) is respectively AA sectional drawing and BB sectional drawing of the information display panel module shown to Fig.8 (a). (A) And (b) is the principal part upper perspective view and principal part lower perspective view which respectively show the junction part of the panel board | substrate and connection board | substrate of the information display panel module in the 1st modification of embodiment of this invention. is there. (A) And (b) is respectively AA sectional drawing and BB sectional drawing of the information display panel module shown to Fig.10 (a). (A) And (b) is the principal part upper perspective view and principal part lower perspective view which respectively show the junction part of the panel board | substrate and connection board | substrate of an information display panel module in the 2nd modification of embodiment of this invention. is there. (A) And (b) is respectively AA sectional drawing and BB sectional drawing of the information display panel module shown to Fig.12 (a). (A) And (b) is the principal part upper perspective view and principal part lower perspective view which show the junction part of the panel board | substrate and connection board | substrate of an information display panel module in the 3rd modification of embodiment of this invention, respectively. is there. (A) And (b) is respectively AA sectional drawing and BB sectional drawing of the information display panel module shown to Fig.14 (a). (A) And (b) is the principal part upper perspective view and principal part lower perspective view which respectively show the junction part of the panel board | substrate and connection board | substrate of an information display panel module in the 4th modification of embodiment of this invention. is there. (A) And (b) is respectively AA sectional drawing and BB sectional drawing of the information display panel module shown to Fig.14 (a). It is a figure for showing the preparation point of the information display panel concerning the example of an invention in the example of the present invention. It is a figure for showing the preparation point of the information display panel which concerns on the comparative example in the Example of this invention.

Hereinafter, the present invention will be specifically described.
(Basic configuration of information display panel used in the present invention)
First, the basic configuration of the information display panel used in the present invention will be described with reference to FIGS. 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 14W configured as a particle group including negatively charged white particles 14Wa and a black display medium 14B configured as a particle group including positively charged black particles 14Ba) Are arranged in each cell 16 formed by the partition 15 between the panel substrates, and the display electrode 9 (striped electrode) provided on the panel substrate 2 and the display electrode 10 (striped electrode) provided on the panel substrate 3 are provided. ) Move 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). To. Then, the white display medium 14W is visually recognized by the observer as shown in FIG. 3A, or the black display medium 14B is visually recognized by the observer as shown in FIG. 3B. Are displayed in a matrix with black and white dots. In FIGS. 3A and 3B, the front partition is 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.

  In this example, the pixel (counter electrode pair) and the cell have a one-to-one correspondence, but the pixel and the cell may not have a one-to-one correspondence. In addition, the adhesive 17 is disposed between the partition wall portion 15 and the panel substrate 3 on the back side, and the other panel substrate 2 is bonded and bonded. However, other bonding structures may be employed. Good. Moreover, although the example using a white particle group and a black particle group was shown, the combination of colors is not restricted to black and white, and what is necessary is just a mutually different color (an optical reflectance is different). Since one is a display color and the other is a background color, it is preferable to use a combination considering the contrast of the displayed information image.

  The information display panel used in the present invention is a panel substrate as shown in FIGS. 4A and 4B instead of the passive drive system shown in FIGS. 3A and 3B. 3 may be an active drive system in which the display electrode provided in 3 is configured as a pixel electrode 10 ′ with a TFT 18.

  The example of the information display panel shown in FIGS. 3 and 4 includes a particle group having optical reflectivity and chargeability disposed between the panel substrates 1 and 2 as a display medium, and in a gas such as air or nitrogen, or in a vacuum. Although it was the structure which moves inside, it is not limited to this. For example, as shown in FIG. 5, a capsule CP in which the inside is filled with a transparent insulating liquid CL and black positively charged particles BL and white negatively charged particles WH are enclosed therein is provided on the panel substrates 2 and 3. Alternatively, a configuration in which the electrodes are disposed between the electrodes may be employed. Further, as shown in FIG. 6, the space defined by the partition 15 between the electrodes provided on the panel substrates 2 and 3 may be filled with the blue insulating liquid BU and the white negatively charged particles WT may be enclosed. .

(Typical embodiment of the information display panel module according to the present invention)
Next, typical embodiments of the information display panel module according to the present invention will be described with reference to FIGS. Since the structure is the same as that shown in FIGS. 1 and 2, the same components are denoted by the same reference numerals.

  First, FIG. 7 shows an overall configuration of an embodiment of an information display panel module according to the present invention. In the figure, 4-1 and 4-2 are connection substrates (FPC) with the panel substrates 2 and 3, respectively, and 19-1 and 19-2 are TCPs connected to the connection substrates 4-1 and 4-2, respectively. 20-1 and 20-2 are driver ICs, and 21 is an information display panel module.

  As shown in FIG. 7, the information display panel module 21 in this example includes a pair of flexible panel substrates 2 and 3 each having a rectangular shape in this example, and their long side direction and short side direction. Are connected to each other with a display means (for example, the display medium shown in FIGS. 3 to 6) interposed therebetween in a state where the connection substrate (FPC) mounting regions are arranged in parallel so as to be open. In addition, one end of each of the connection substrates 4-1 and 4-2 is joined to an edge region on the back surface (inner surface of the panel) of the panel substrates 2 and 3. TCPs 19-1 and 19-2 on which driver ICs 20-1 and 20-2 used for controlling voltages applied to the display electrodes are respectively installed at the other ends of the connection substrates 4-1 and 4-2. It is joined. In this example, since the TCPs 19-1 and 19-2 have a shorter substrate width than the panel substrates 2 and 3, the connection substrate 4 having one end formed to have substantially the same substrate width as the panel substrates 2 and 3 is used. 1 and 2-2, the TCP 19-1 and 19-2 are connected to the panel substrates 2 and 3. 19-2 may be directly bonded to the panel substrates 2 and 3, and the connection substrates 4-1 and 4-2 may be omitted.

  Here, in the present invention, the fact that the panel width of the panel substrate and the connection substrate (FPC) (the width of the portions connected to each other) is substantially the same means that the difference in the substrate width is 5 mm or less. For example, when a connection board (FPC) with a short width is arranged with respect to a panel board with a large width, if the difference is such that a gap of 2.5 mm is formed on each side of the FPC, the connection board (FPC) ) And the panel substrate can be effectively prevented from peeling off the anisotropic conductive material. On the other hand, when a gap exceeding 5 mm occurs, a sufficient effect cannot be obtained. The reason is not clear, but it is assumed that there is a difference between the case where the gap is large and the case where the gap is large in the way of applying the strain stress that occurs when the entire information display panel module is bent. .

  Next, a bonding structure between the panel substrate 2 and the connection substrate 4-1 of the information display panel module 21 in this example shown in FIG. 7 will be described with reference to FIGS. 8 and 9. 8 (a) and 8 (b) are respectively an upper perspective view and a lower part of the main part showing a joint portion between the panel substrate 2 and the connection substrate 4-1 of the information display panel module 21 shown in FIG. FIGS. 9A and 9B are an AA sectional view and a BB sectional view of the information display panel module 21 shown in FIG. 9A, respectively.

8 and 9, reference numeral 22 denotes a moisture-proof insulating material, 22a denotes a first portion of the moisture-proof insulating material, 22b denotes the second portion, and 22c denotes the third portion.
As shown in FIGS. 8 and 9, in this example, the edge 2 a of the panel substrate 2 and the connection substrate are extended over the side surface of the panel substrate 2 with a width exceeding the substrate width of the panel substrate 2 and the connection substrate 4-1. A moisture-proof insulating material 22 is formed so as to cover the display electrode terminal portion 5 and the connection electrode terminal portion 6 exposed from the edge 4a of 4-1, and the anisotropic conductive material 7.
Thus, it is one of the features of the present invention that the moisture-proof insulating material 22 is formed not only on the edge of the panel substrate 2 but also on the side surface of the panel substrate 2.
Further, the moisture-proof insulating material 22 is a portion where the anisotropic conductive material 7 is not formed in the gap between the panel substrate 2 and the connection substrate 4-1 (region portion corresponding to both end surfaces of the anisotropic conductive material 7). Also formed. It is one of the features of the present invention to form the third portion 22c of the moisture-proof insulating material.

Specifically, as shown in FIGS. 8 and 9, the moisture-proof insulating material 22 is a panel substrate over the side surface of the panel substrate 2 with a width exceeding the substrate width of the panel substrates 2 and 3 and the connection substrate 4-1. The first portion 22a formed by the first moisture-proof insulating material covering the side edges of the two edge 2a and the connection substrate 4-1, the edge 4a, the edge region 4r and the panel of the connection substrate 4-1. A second portion 22b formed by a second moisture-proof insulating material covering the side surface of the substrate 2, and a region portion corresponding to both end surfaces of the anisotropic conductive material 7, which is a panel substrate 2 and a connection substrate 4-1. And a third portion 22c formed by a moisture-proof insulating material covering the side surface of the connection substrate 4-1.
In the gap between the connection substrate 4-1 and the panel substrate 2, the anisotropic conductive material 7 is formed with a width equal to or larger than the widths of the display electrode terminal portion 5 and the connection electrode terminal portion 6.

  In this example, the second portion 22 b is formed so as to span the edge 3 a of the panel substrate 3. By the first portion 22a, the display electrode terminal portion 5 and the connection electrode terminal portion 6 that are exposed from the anisotropic conductive material 7 in the gap between the edge 2a of the panel substrate 2 and the surface of the connection substrate 4-1. Can be coated. Further, by the second portion 22b, the region between the edge 3a of the panel substrate 3 and the edge 4a of the connection substrate 4-1, and the back surface of the panel substrate 2 and the edge 4a of the connection substrate 4-1. The display electrode terminal portion 5 and the connection electrode terminal portion 6 exposed from the anisotropic conductive material 7 in the gap can be covered.

In this way, the first portion 22a and the second portion 22b of the moisture-proof insulating material are both bonded to the edge and side portions of the two substrates (panel substrate 2, connection substrate 4-1), and anisotropic conductive By connecting the panel substrate 2 to the panel substrate 2 by forming the third portion 22c in which the moisture-proof insulating material 22 is formed in the gap portion where the material 7 is not formed (region portion corresponding to both end surfaces of the anisotropic conductive material 7). The bonding force with the substrate 4-1 can be effectively improved.
Further, although not shown in FIG. 8, a sixth portion of the moisture-proof insulating material that connects the first portion 22a and the second portion 22b of the moisture-proof insulating material at the side surface portion of the substrate (see 28f in FIG. 14). ) Can further effectively improve the bonding force between the panel substrate 2 and the connection substrate 4-1.

Further, the moisture-proof insulating material 22 (second moisture-proof insulating material) covers the edge 4a and the edge region 4r of the connection substrate 4-1, and is further joined to the connection substrate 4-1. The region between the edge 3a of the panel substrate 3 and the edge 4a of the connection substrate 4-1 is covered over the entire substrate width of the panel substrate 3 facing the substrate 2, and the covered region is the panel. It is preferable to reach the surface of the substrate 3.
Specifically, as shown in FIG. 10 and FIG. 11 as the moisture-proof insulating material 24, the second portion 24 b of the moisture-proof insulating material 24 does not stay on the edge 3 a of the panel substrate 3, but the edge 3 a of the panel substrate 3. It is preferable to extend over the surface of the panel substrate 3 over the distance. (See especially Figure 11)

The material of the moisture-proof insulating material 22 (the first moisture-proof insulating material and the second moisture-proof insulating material) has at least moisture permeation resistance, flexibility, insulation, and migration resistance. A material that adheres to the substrate, the electrode terminal portion, the connection substrate such as FPC or TCP is used.
There are a method of curing by removing the solvent, a method of curing by humidity, a method of curing by light such as ultraviolet rays, etc. As materials, silicone resin, acrylic resin and epoxy resin are used. These can be used alone or in combination.
The moisture-proof insulating material is disposed by a method such as dispensing or spray coating.

The physical properties of the material of the moisture-proof insulation 22 (first moisture-proof insulation material and second moisture-proof insulation material) are as follows from the viewpoint of ease of manufacture and reliability after being incorporated into a product. More preferred.
・ Viscosity 0.1-10Pa ・ s (25 ℃)
・ Curing conditions 500mJ ~ 2500mJ for UV curing system
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
・ Water vapor transmission rate 1000g / m ²・ 24h or less ・ Ion concentration 10ppm or less for both Na ion and Cl ion

  According to the information display panel module 21 according to the present embodiment described above, the connection substrate 4-1 has the same substrate width as the panel substrate 2 bonded to the substrate 4-1, and the connection substrate 4-4. The moisture-proof insulating material formed with a width exceeding the substrate width of 1 and the first panel substrate 2 includes the edge 2a of the first panel substrate 2, the connection electrode terminal portion 6, and the edge of the connection substrate 4-1. 4a, the edge region 4r, and the display electrode terminal portion 5 are covered, the back surface of the first panel substrate 2 (the surface on which the display electrode terminal portion is installed), and the connection electrode terminal of the connection substrate 4-1 The gap portion where the anisotropic conductive material 7 is not formed is filled in the gap with the surface on which the portion 6 is installed, and the gap is bonded at the side surface portion of the first panel substrate 2 and the side surface portion of the connection substrate 4-1. As a result, the electrode terminal portion exposed from the anisotropic conductive material 7 is moisture-proof. Of course, it can be covered with the insulating material 22 and can be protected from moisture in the external environment, and even when a force is applied that either the first panel substrate 2 or the connection substrate 4-1 is bent, Further, even when a force that causes both the first panel substrate 2 and the connection substrate 4-1 to bend acts, the connection between the display electrode terminal portion 5 of the first panel substrate 2 and the connection substrate 4-1 is possible. It is possible to effectively prevent the anisotropic conductive material 7 formed between the electrode terminal portion 6 and the electrode terminal portion 6 from peeling off. As a result, display quality can be improved.

  Further, the moisture-proof insulating material 22 extends to the side surface portion of the first panel substrate 2 and the side surface portion of the connection substrate 4-1, and is connected to and integrated with each other on the side surface portions of these two substrates. By forming the structure (the structure in which the moisture-proof insulating material 28 or 30 shown in FIGS. 14 and 16 has the sixth portion), it is possible to more effectively prevent the anisotropic conductive material 7 from being peeled off.

  Further, the moisture-proof insulating material 22 covers the edge 4a and the edge region 4r of the connection substrate 4-1, and further, the first panel substrate 2 joined to the connection substrate 4-1 is opposed to the first panel substrate 2. By covering the region between the edge 3a of the second panel substrate 3 and the edge 4a of the connection substrate 4-1, over the entire substrate width of the second panel substrate 3, the connection substrate 4-1 Can be bonded also to the second panel substrate 3 by the moisture-proof insulating material 22, so that the bonding strength between the connection substrate 4-1 and the first panel substrate 2 is effectively increased, and the anisotropic conductive material 7 can be more effectively prevented.

  Furthermore, the moisture resistance which covers the area | region between the edge 3a of the 2nd panel board | substrate 3 and the edge 4a of the connection board 4-1, and the edge part area | region 4r containing the edge 4a of the connection board 4-1. By making the insulating material 22 (second moisture-proof insulating material) extend to the surface of the second panel substrate 3, the connection substrate 4-1 is connected to the second panel by the moisture-proof insulating material 22. Since the substrate 3 can be more effectively bonded, the bonding strength between the connection substrate 4-1 and the first panel substrate 2 can be increased more effectively, and the anisotropic conductive material 7 can be further peeled off. It can be effectively prevented.

In addition, the junction structure using the moisture-proof insulating material 22 between the panel substrate 2 and the connection substrate 4-1 described above is the junction between the panel substrate 3 and the connection substrate 4-2 shown as X-2 in FIG. It can be similarly applied to.
Moreover, the junction structure using the moisture-proof insulating material 22 between the panel substrate 2 and the connection substrate 4-1 described above is a connection substrate (FPC) 4-1 shown as Y-1 and Y-2 in FIG. 4-2 and TCP 19-1, 19-2 can be similarly applied.

(First Modification of Embodiment of Information Display Panel Module According to the Present Invention)
Next, a first modification of the embodiment of the information display panel module according to the present invention will be described with reference to FIGS. In addition, about the structure same as the structure shown in FIG. 8, FIG. 9, the same code | symbol is attached | subjected and shown. Here, FIG. 10A and FIG. 10B are respectively an upper perspective view and a lower part of the main part showing a joint portion between the panel substrate 2 and the connection substrate 4-1 of the information display panel module 23 in this example. FIG. 11A and FIG. 11B are respectively an AA sectional view and a BB sectional view of the information display panel module 23 shown in FIG. 11A.

10 and 11, reference numeral 24 denotes a moisture-proof insulating material, 24a denotes a first part of the moisture-proof insulating material, 24b denotes the second part, 24c denotes the third part, and 24d denotes the fourth part.
The first portion 24a, the second portion 24b and the third portion 24c of the moisture-proof insulating material 24 are respectively the first portion 22a, the second portion 22b and the third portion of the moisture-proof insulating material 22 shown in FIGS. This is the same as 22c.

  This example is characterized in that a fourth portion 24d formed to extend from the second portion 24b of the moisture-proof insulating material 24 to the surface of the panel substrate 2 is provided. That is, the moisture-proof insulating material 24 covering the edge 4a of the flexible connection substrate 4-1 is extended to the surface of the panel substrate 2, and the moisture-proof insulating material 24 is bonded to the panel substrate 2 at this portion as well. ing.

As described above, the moisture-proof insulating material 24 is not limited to the side surfaces of the two substrates, but is further extended to the surface of the panel substrate 2, whereby the panel substrate 2 and the connection substrate 4-1 by the moisture-proof insulating material 24. The bonding strength between the anisotropic conductive material 7 and the anisotropic conductive material 7 can be more effectively prevented.
(Second Modification of Embodiment of Information Display Panel Module According to the Present Invention)
Next, a second modification of the embodiment of the information display panel module according to the present invention will be described with reference to FIGS. In addition, about the structure same as the structure shown in FIG. 10, FIG. 11, the same code | symbol is attached | subjected and shown. Here, FIG. 12A and FIG. 12B are respectively an upper perspective view and a lower part of the main part showing the joint part between the panel substrate 2 and the connection substrate 4-1 of the information display panel module 25 in this example. FIG. 13A and FIG. 13B are an AA sectional view and a BB sectional view of the information display panel module 25 shown in FIG. 12A, respectively.

12 and 13, 26 is a moisture-proof insulating material, 26a is a first portion of the moisture-proof insulating material, 26b is the second portion, 26c is the third portion, 26d is the fourth portion, and 26e is the same. 5 parts are shown.
The first portion 26a, the second portion 26b, the third portion 26c, and the fourth portion 26d of the moisture-proof insulating material 26 are respectively the first portion 24a and the second portion of the moisture-proof insulating material 24 shown in FIGS. 24b, the third portion 24c, and the fourth portion 24d.

  The present embodiment is characterized in that a fifth portion 26e formed to extend from the first portion 26a of the moisture-proof insulating material 26 to the surface of the panel substrate 2 is provided. That is, a region where the edge 2a of the first panel substrate 2 is covered with the moisture-proof insulating material 26 is extended to the surface of the panel substrate 2, and the moisture-proof insulating material 26 is bonded to the panel substrate 2 also in this portion. .

  As described above, the moisture-proof insulating material 26 is not extended to the side surfaces of the two substrates, but is further extended to the surface of the panel substrate 2, and the moisture-proof insulating material 26 is not fixed to the edge of the panel substrate 2. Furthermore, by extending to the surface of the panel substrate 2, the bonding strength between the panel substrate 2 and the connection substrate 4-1 by the moisture-proof insulating material 26 is further increased, and the anisotropic conductive material 7 is further peeled off. It can be effectively prevented.

(Third Modification of Embodiment of Information Display Panel Module According to the Present Invention)
Next, a third modification of the embodiment of the information display panel module according to the present invention will be described with reference to FIGS. In addition, about the same structure as the structure shown in FIG. 12, FIG. 13, the same code | symbol is attached | subjected and shown.

  Here, FIG. 14A and FIG. 14B are an upper perspective view and a lower part of a main part showing a joint part between the panel substrate 2 and the connection substrate 4-1 of the information display panel module 27 in this example, respectively. FIGS. 15A and 15B are an AA sectional view and a BB sectional view of the information display panel module 27 shown in FIG. 14A, respectively.

  14 and 15, 28 is a moisture-proof insulating material, 28a is a first part of the moisture-proof insulating material, 28b is the second part, 28c is the third part, 28d is the fourth part, and 28e is the same. 5 part and 28f show the 6th part.

  The first portion 28a, the second portion 28b, and the third portion 28c of the moisture-proof insulating material 28 are the first portion 24a, the second portion 24b, and the third portion 24c of the moisture-proof insulating material 24 shown in FIGS. It is the same. The example shown here is characterized in that the fourth portion 28d, the fifth portion 28e, and the sixth portion 28f of the moisture-proof insulating material 28 are formed.

  In this example, when the first portion 28a is formed as the moisture-proof insulating material 28, the fifth portion 28e is formed so as to extend to the surface of the panel substrate 2 and the second portion 28b is formed. Cover the surface of the connection substrate 4-1 with a length reaching the edge 2a of the substrate 2, and extend to the side surface of the panel substrate 2, and further to the surface of the panel substrate 2, It is characterized in that 28f and the fourth portion 28d are formed.

  In this example, as shown in FIGS. 14 and 15, the moisture-proof insulating material 28 fills the gap between the edge 4 a of the connection substrate 4-1 and the panel substrate 3, and also on the surface of the panel substrate 3. The connection substrate 4-1 and the connection substrate 4-1 so as to cover the end region 4 r of the connection substrate 4-1 over the back surface of the connection substrate 4-1 and reach the edge 2 a of the panel substrate 2. Moisture-proof insulation formed by extending the surface of the panel substrate 2 beyond the width of the panel substrate 2 and extending the moisture-proof insulating material 28 connected to the side surfaces of the two substrates to the surface of the panel substrate 2 The fourth portion 28d of the material 28 and the fifth portion 28e are connected to each other.

  In this way, the moisture-proof insulating material 28b formed so as to cover the end region 4r of the connection substrate 4-1 with the length reaching the edge of the panel substrate 2 so as to cover the surface of the connection substrate 4-1. The substrate 4 for connection by the moisture-proof insulating material 28 is integrated with the moisture-proof insulating material 28 a extending beyond the edge 2 a of the panel substrate 2 to the surface of the panel substrate 2 on the surface of the panel substrate 2. -1 and the panel substrate 2 can be further increased in bonding strength, and separation of the anisotropic conductive material 7 can be more effectively prevented.

(Fourth Modification of Embodiment of Information Display Panel Module According to the Present Invention)
Next, a fourth modification of the embodiment of the information display panel module according to the present invention will be described with reference to FIGS. In addition, about the structure same as the structure shown in FIG. 14, FIG. 15, the same code | symbol is attached | subjected and shown.

  Here, FIG. 16A and FIG. 16B are respectively a top perspective view and a bottom view of the main part showing a joint portion between the panel substrate 2 and the connection substrate 4-1 of the information display panel module 29 in this example. FIG. 17A and FIG. 17B are respectively an AA sectional view and a BB sectional view of the information display panel module 29 shown in FIG. 16A.

  16 and 17, 30 is a moisture-proof insulating material, 30a is a first portion of the moisture-proof insulating material, 30b is the second portion, 30c is the third portion, 30d is the fourth portion, and 30e is the same. 5 part, 30f shows the 6th part, 30g shows the 7th part.

  The first portion 30a, the second portion 30b, the third portion 30c, the fourth portion 30d, the fifth portion 30e, and the sixth portion 30f of the moisture-proof insulating material 30 are the moisture-proof insulating material 28 shown in FIGS. The same as the first portion 28a, the second portion 28b, the third portion 28c, the fourth portion 28d, the fifth portion 28e, and the sixth portion 28f.

In this example, the first portion 30a, the second portion 30b, the third portion 30c, the fourth portion 30d, the fifth portion 30e, the sixth portion 30f, and the seventh portion 30g are formed as the moisture-proof insulating material 30. The sixth portion 30f and the fourth portion 30d extending from the both side edges of the panel substrate 3 to the surface of the panel substrate 2 through the both side edges of the connection substrate 4-1, are connected to each other, as shown in FIGS. It is characterized in that an annular covering structure in which the covering area of the panel substrate 2 is wider than the annular structure shown in FIGS. 14 (a) and 14 (b) is formed.
By adopting such a structure, the bonding strength between the connection substrate 4-1 and the panel substrate 2 by the moisture-proof insulating material 30 is remarkably increased, and the separation of the anisotropic conductive material 7 is further effectively prevented. Can do.

(General components of the information display panel used in the present invention)
Hereinafter, general components of the information display panel used in the present invention will be described.
The thickness of the observation-side panel substrate of the pair of panel substrates is preferably in the range of 25 μm to 1000 μm for a flexible information display panel, but for a thin information display panel, The range of 25 micrometers-500 micrometers is preferable, Furthermore, the range of 25 micrometers-200 micrometers is preferable. As a panel substrate on the observation side, in addition to a resin substrate such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide, polyethylene sulfonate (PES), a glass substrate having a thickness in the range of 25 μm to 200 μm is used. be able to. In any case, the information display area is transparent at least.

  The thickness of the panel substrate on the back side of the pair of panel substrates is preferably in the range of 25 μm to 1000 μm for a flexible (flexible) information display panel, The range of 25 micrometers-500 micrometers is preferable, Furthermore, the range of 25 micrometers-200 micrometers is preferable. As the panel substrate on the back side, organic polymers such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (PE), polycarbonate (PC), polyimide (PI), polyethersulfone (PES), acrylic, etc. A material sheet, a glass substrate having a thickness of 25 μm to 200 μm, a metal substrate whose surface is covered with an insulating film, or the like is used.

  In order to obtain an information display panel module that can be bent as a whole, the information display panel needs to have flexibility. Among the above-mentioned panel substrates, an organic polymer material substrate, a metal substrate, or a thickness of 200 μm or less is required. A flexible substrate such as a glass substrate is preferably used.

  In the display electrode (pixel electrode) arranged to face the information display area, a transparent electrode is provided in the transparent information display area of the observation 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. And transparent conductive metal oxides such as polyaniline, polypyrrole, and transparent conductive polymers such as poly (3, 4-ethylenedioxythiophene) -poly- (styrene-sulfonate) (PEDOT: PSS). . In addition, the thickness of the electrode provided in the information display region is not particularly limited as long as the conductivity can be secured and the light transmittance is not hindered, and is preferably 0.01 μm to 10 μm, more preferably 0.05 μm to 5 μm.

  In the display electrode (pixel electrode) arranged to face the information display region, the electrode provided on the panel substrate on the back side 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- (styrene-sulfonate) ) Conductive polymers such as polythiophene such as (PEDOT: PSS), conductive metals such as gold, silver, copper, aluminum, nickel, and chromium, and alloys based on these conductive metals. Can be mentioned. The pixel electrode provided in the information display area of the back side substrate may be transparent or may not be transparent. In addition, the thickness of the pixel electrode provided in the information display 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 Examples and Comparative Examples, 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 consists of 60 parts by weight of methyl methacrylate monomer (Kanto Chemical Reagent) and 40 parts by weight (about 25 mol) of ethylene glycol dimethacrylate (Wako Pure Chemical Reagent) as a polyfunctional monomer having a plurality of polymerization reactive groups in one molecule. %), 3 parts by weight of a nigrosine compound (Bontron N07: manufactured by Orient Chemical Co., Ltd.) 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 resin block copolymer (Modiper F600: manufactured by NOF Corporation) was dissolved, and further 2 parts by weight of lauryl peroxide (PAROIL L: manufactured by NOF Corporation) was dissolved. The polyoxyethylene alkyl ether sulfate as a surfactant After suspending, polymerizing, filtering, and drying in purified water containing 0.5% sodium (Latemul E-118B: manufactured by Kao), it was classified using a classifier (MDS-2: Nippon Pneumatic Industry). And a group of positively charged black particles having an average particle diameter of 9.2 μm.

  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.) as an agent is melt-kneaded with a twin-screw kneader and finely pulverized with a jet mill (Lab Jet Mill IDS-LJ type: Nippon Pneumatic Co., Ltd.). The average particle diameter obtained by classifying using a classifier (MDS-2: Nihon Numatic Kogyo) and melt spheronizing using a melt spheronizer (MR-10: Nihon Numatic Kogyo) , 9.5 μm negatively chargeable white particle group.

Using the display medium described above, an information display panel, an information display panel module, and an information display device (electronic paper) were produced in the manner described below.
<Production of information display panel>
Two types of display media were placed between two sheets of polyethylene terephthalate (PET) substrates (thickness 125 μm) with ITO stripe electrodes (width 300 μm, pitch 30 μm) facing each other.
In a panel on which an FPC having a width corresponding to the substrate width was mounted, the display electrode was directly pulled out to the edge of the substrate to form a connection terminal portion. (See Figure 18)
In a panel on which a TCP having a width smaller than the substrate width is mounted, a connection terminal portion is formed by arranging the lead-out electrode from the display electrode so as to narrow the width in accordance with the TCP width. (See Figure 19)
The display medium is a white display medium that is a group of particles containing negatively charged white particles and a black display medium that is a group of particles containing positively charged black particles in an equivalent amount (1 to 1 by weight) between the PET substrates. After placing in the space surrounded by the partition walls with 50% RH air with a volume occupancy rate of 30%, a sealing material is placed around the area where the display medium is placed, and the two PET substrates are bonded together To obtain an information display panel.

  A rectangular substrate (150 mm × 155 mm) of the same size was opposed to each other with the vertical and horizontal directions opposite to each other, so that the portion on which the FPC substrate was mounted was a short side (150 mm) region. It was made possible to perform ACF mounting in a state where an open space having a width of 5 mm, which is not a PET substrate on which the FPC substrate is mounted, is not in the mounting region.

<Production of Information Display Panel Modules of Invention Examples and Comparative Examples Using Relay FPC>
Apart from the information display panel, an FPC board having an electrode part formed on a polyimide film serving as a relay board is prepared, and a TCP (width 40 mm) with a driver IC mounted on one side of the FPC board is ACF. Implemented with.
The substrate width on the TCP mounting side of the relay FCP substrate was set to 42 mm, which is substantially the same as the TCP width of 40 mm, and the TCP mounting on the relay FPC substrate was performed by pressure bonding after placing the ACF. A moisture-proof insulating material having a coated annular structure shown in FIG. 16 was formed on the TPC mounting portion.
The display electrode terminal portion of the information display panel was provided with a stripe structure formed by extending and extending the ITO stripe electrode for pixels provided in the information display area. As the substrate width of the relay FCP substrate on the information display panel side, a substrate width of 145 mm to 150 mm, which is substantially the same as the substrate width of the information display panel, and a substrate width of 140 mm, which are different from each other, were prepared. Mounting of the relay FPC board on the board of the information display panel was performed by pressure bonding after placing the ACF.

A moisture-proof insulating material is arranged at two connection locations (two ACF mounting portions formed on the back side panel substrate and the observation side panel substrate) which are crimped after the ACF is arranged, and FIG. 8, FIG. 10, FIG. Each covering structure shown in FIGS. 14 and 16 was formed.
All of the moisture-proof insulating materials were disposed so as to exceed the ACF length, exceed the width of each substrate, and fill all gap portions between the panel substrate and the FPC.
The moisture-proof insulating material used was SA3220 manufactured by Sony Chemical & Information Device, and was provided using a dispenser and an ultraviolet spot lamp. The curing condition of the moisture-proof insulating material was 1000 mJ / cm ² and the elastic modulus after curing was 2.0 × 10 ⁸ Pa.

<Production of information display panel module of comparative example in which TCP is directly mounted>
On the information display panel, TCP (width 40 mm) on which a driver IC was mounted was mounted by ACF.
TCP mounting on the PET substrate of the information display panel was performed by pressure bonding after placing the ACF.
The display electrode terminal portion of the information display panel is provided with a stripe structure formed by extending and extending the ITO stripe electrode for pixels provided in the information display screen region.
A moisture-proof insulating material was placed at two connection locations (two ACF mounting portions formed on the back side panel substrate and the observation side panel substrate) that were crimped after the ACF was placed.
Each of the moisture-proof insulating materials is arranged in the exposed portion of the display electrode terminal portion and the connection electrode terminal within the width of the TCP according to the ACF length, and the moisture-proof insulating material shown in FIG. An arrangement structure was adopted.
The moisture-proof insulating material used was SA3220 manufactured by Sony Chemical & Information Device Co., which was provided using a dispenser and an ultraviolet spot lamp. The curing condition of the moisture-proof insulating material was 1000 mJ / cm ² and the elastic modulus after curing was 2.0 × 10 ⁸ Pa.

<Preparation of electronic paper>
As shown in FIGS. 7 and 18, 100 information display panel modules having a configuration in which an FPC board connected to a TCP was mounted on a substrate on the observation side and a substrate on the back side were manufactured in each invention example and comparative example 3. Further, 100 information display panel modules each having a configuration in which TCP is mounted on the observation side substrate and the back side substrate as shown in FIGS. 1 and 19 were manufactured in each of Comparative Examples 1 and 2.
And about the information display panel module in each invention example and the comparative example 3, the FPC board connected to TCP mounted on the board on the observation side, and the FPC board connected to TCP mounted on the board on the back side were folded, The circuit board of the driving device on the back side of the information display unit and TCP are connected to obtain electronic paper. Similarly, for the information display panel modules in Comparative Example 1 and Comparative Example 2, the TCP mounted on the observation-side substrate and the TCP mounted on the back-side substrate are folded to drive the drive device on the back side of the information display unit. The circuit board and TCP were connected to form an information display device (electronic paper).

<Evaluation>
Test patterns were displayed on 100 information display devices (electronic papers) in each invention example and comparative example produced as described above, and the display images were visually observed and evaluated. The results are shown in Table 1.

  Based on the above results, according to the present invention, when the information display panel module is connected to the external drive circuit board, the panel board and the flexible connection board are electrically connected to each other when the connection board is folded back. A part of the anisotropic conductive material that has been peeled off can be reliably avoided as a result of the display failure, and the flexible panel substrate that employs two flexible panel substrates can be avoided. In the information display device (electronic paper) after assembling the sexual information display panel module, a force is applied to bend one or both of the two flexible panel substrates. However, it is possible to reliably avoid a problem in which a part of the anisotropic conductive material that conducts each other between the panel substrate and the connection substrate is peeled off, resulting in a display defect. Is confirmed It was.

In accordance with the present invention, the panel substrate and the connection substrate have substantially the same substrate width, and a moisture-proof insulating material is provided over the side surface of the panel substrate over the entire length of the substrate width, and the gap between the panel substrate and the connection substrate is provided. The information display panel module that has improved the bonding strength between the panel substrate and the connection substrate by forming a moisture-proof insulating material is a portable information device called notebook PC, electronic notebook, PDA (Personal Digital Assistants) , Display units of mobile devices such as mobile phones and handy terminals, electronic papers such as electronic books, electronic newspapers, electronic manuals (electronic instruction manuals), signboards, posters, bulletin boards such as blackboards and whiteboards, electronic desk calculators, home appliances Products, display parts for automobile goods, card display parts such as point cards, IC cards, electronic advertisements, information boards, electronic POP (P oint of presence, point of purchase advertising), electronic price tag, electronic shelf label, electronic score, display part of RF-ID equipment, suitable for display part of various information display devices such as POS terminal, car navigation device, clock Can be used. In addition, it can be suitably used as a rewritable information display panel module that can be continuously displayed even after the connection is disconnected after the display is rewritten by being electrically connected to the external rewriting means.
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 Panel substrate 2a Edge of panel substrate 2 3 Panel substrate 3a Edge of panel substrate 3 4 Connection board 4a Edge of connection board 4r End area of connection board 5 Display electrode terminal part 6 Connecting electrode terminal portion 7 Anisotropic conductive material 8 Moisture-proof insulating material 8a First portion of moisture-proof insulating material 8b Second portion of moisture-proof insulating material 9, 10 Display electrode 11 Connecting electrode 12 Sealing material 13 Rib 19-1, 19-2 TCP
20-1, 20-2 Driver IC
21, 23, 25, 27, 29 Information display panel module 22, 24, 26, 28, 30 Moisture-proof insulating material 22a, 24a, 26a, 28a, 30a Moisture-proof insulating material first portion 22b, 24b, 26b, 28b 30b Second part of moisture-proof insulating material 22c, 24c, 26c, 28c, 30c Third part of moisture-proof insulating material 24d, 26d, 28d, 30d Fourth part of moisture-proof insulating material 26e, 28e, 30e Moisture-proof insulation 5th part of material 28f, 30f 6th part of moisture-proof insulating material 30g 7th part of moisture-proof insulating material

Claims (7)

A pair of flexible panel substrates composed of a first panel substrate and a second panel substrate disposed opposite to each other;
Display means for displaying information by electrical control between the first and second panel substrates via display electrodes;
A flexible connection substrate for connecting the display electrode to an external drive circuit,
A terminal portion of a display electrode installed on the back surface of the first panel substrate which is one of the pair of flexible panel substrates; a terminal portion of a connection electrode installed on the flexible connection substrate; Is an information display panel module having a structure in which the terminal portions of the display electrodes and the terminal portions of the connection electrodes are connected by an anisotropic conductive material,
The flexible connection substrate has a substrate width substantially the same as that of the first panel substrate bonded to the substrate,
Moisture proof covering the edge of the first panel substrate, the edge of the flexible connection substrate, and the display electrode terminal portion and the connection electrode terminal portion exposed from the anisotropic conductive material An insulating material is formed over the side surface of the first panel substrate with a width exceeding the substrate width of the first panel substrate, and the first panel substrate is in contact with both end surfaces of the anisotropic conductive material. An information display panel module, characterized in that a moisture-proof insulating material is also formed in a gap between the flexible connection substrate.   The moisture-proof insulating material that covers the edge of the flexible connection substrate extends over the flexible connection substrate and has a length that is longer than the edge of the first panel substrate. 2. The information display panel module according to claim 1, wherein the information display panel module is formed over a side surface of the first panel substrate with a width exceeding a substrate width of the first panel substrate.   The moisture-proof insulating material that covers the edge of the flexible connection substrate is further the total substrate width of the second panel substrate facing the first panel substrate joined to the flexible connection substrate. 3. The information display panel module according to claim 1, wherein the information display panel module is formed over an end edge of the second panel substrate.   The moisture-proof insulating material covering the edge of the flexible connection substrate and extending over the edge of the second panel substrate is further extended to the surface of the second panel substrate. The information display panel module according to claim 3.   5. The moisture-proof insulating material covering an edge of the flexible connection substrate is further extended to the surface of the first panel substrate. 6. Information display panel module.   6. The region according to claim 1, wherein a region covering an edge of the first panel substrate is extended to a surface of the first panel substrate by the moisture-proof insulating material. Information display panel module.   A moisture-proof insulating material that covers the edge of the flexible connection substrate and a moisture-proof insulating material that covers the edge of the first panel substrate, which are extended to the surface of the first panel substrate. The information display panel module according to claim 5 or 6, wherein the information display panel module has an annular covering structure that is connected and integrated with each other on the surface of the first panel substrate.

Images