JP2005141643A - Touch panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a touch panel that has a cable connection structure further improving a conductive connection state between a conductor pattern of a cable and a land pattern of a substrate with such a range of pressure bonding force as to keep the cable and substrate undamaged. <P>SOLUTION: The touch panel 10 has a glass plate 12 and a film 14 fixed in an opposed relation, and has the cable 16 having an electrode connection part 18 subject to conductive connection to an electrode lead part 20 on the glass plate 12. The electrode connection part 18 and the electrode lead part 20 each have slits extending in a different direction when they are attached together, so that contact force of conductive particles in an anisotropic conductive adhesion can be increased to provide an appreciable conductive connection state between the cable 16 and the glass plate 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a touch panel having high reliability mainly with respect to a cable for conductive connection.

  As shown in FIGS. 7A and 7B, a conventional touch panel 510 used for detecting a position such as an XY coordinate is a glass having a conductive film and a pair of electrodes conductively connected to the conductive film. It has a structure in which the plate 512 and the film 514 are fixed so as to be opposed to each other by an adhesive means 515 such as a double-sided adhesive tape. Further, a cable 516 which is a flexible circuit board (hereinafter abbreviated as FPC) is attached to the glass plate 512 in the touch panel 510 in order to output a change in inter-electrode resistance value to the outside. As shown in FIGS. 7B and 7C, the cable 516 is attached in an anisotropic manner between the conductor pattern 518 of the cable 516 and the land pattern 520 electrically connected to the electrode of the glass plate 512. In general, a conductive conductive adhesive 550 is disposed and the land pattern 520 and the conductive pattern 518 are conductively connected by pressing the glass plate 512 and the cable 516 together.

  As one element related to the reliability of the touch panel, first, the conductivity between the cable and the glass plate or the film, that is, the conductive connection state is mentioned. In the case of the cable 516 as shown in FIGS. 7A and 7B, sufficient reliability of electrical conduction connection between the conductor pattern 518 of the cable 516 and the land pattern 520 on the glass plate 512 cannot be obtained. There is a case. Generally, in the conductive connection between the conductor pattern 518 of the cable 516 and the land pattern 520 of the glass plate 512, an anisotropic conductive adhesive 550 is interposed between the conductor pattern 518 and the land pattern 520 as shown in FIG. The conductive particles in the conductive adhesive 550 are arranged so that the conductor pattern 518 and the land pattern 520 are electrically connected by arranging and crimping the cable 516 and the glass plate 512 to each other. If the pressure-bonding force is insufficient, sufficient adhesion of the conductive particles to the conductor pattern 518 or the land pattern 520 cannot be obtained, and as a result, the conductive connection between the cable 516 and the glass plate 512 becomes insufficient. . Conversely, if the pressure-bonding force is increased too much in order to increase the adhesion, the cable 516 or the glass plate 512 may be damaged or broken. In order to solve this problem, for example, Patent Document 1 describes a liquid crystal display element in which a slit is provided in a terminal that is conductively connected to an electrode. This device makes use of the fact that the number of conductive particles in the conductive adhesive to which the crimping force is applied is reduced by providing the slit, and the adhesion of the conductive particles between the terminal and the electrode without changing the force applied to the entire cable. It is intended to increase the force to obtain a good conductive connection state.

  Another factor related to the reliability of the touch panel is the difficulty of peeling the cable from the glass plate or film, that is, the peel strength. In the case of the touch panel 510 in FIG. 7A, sufficient peel strength may not be obtained only by crimping the cable 516 and the glass plate 512. In that case, an increase in the area of the bonding portion of the cable, or FIG. It is necessary to increase the adhesive strength, that is, the peel strength by using a separate reinforcing resin 560 as shown in FIG. Alternatively, as in another conventional touch panel 610 shown in FIG. 8, the cable 616 is arranged so as to be sandwiched between the glass plate 612 and the film 614, and the land pattern 622 of the film 614 and another conductor pattern 624 of the cable. There is also a method of conducting electrical connection by pressing through an anisotropic conductive adhesive or the like. In the touch panel 510 shown in FIG. 7A, the film and the cable are not directly bonded to each other, so it is necessary to draw a part of the lead line from the electrode of the film on the glass plate. In addition, since the lead line from the electrode of the film can be connected to the cable along the film, there is an advantage that it is easy to narrow the frame of the touch panel, that is, to reduce the size of the touch panel. For example, Patent Document 2 describes a touch panel in which an electrode connection portion of a cable and an upper electrode and a lower electrode of the touch panel are electrically connected by thermocompression bonding.

JP-A-8-201833 JP 2002-175155 A

  As described above, the slit structure described in Patent Document 1 is effective in increasing the adhesion force of the conductive particles of the conductive adhesive for the conductive connection between the conductor pattern of the cable related to the reliability of the touch panel and the land pattern of the glass plate. is there. However, this slit structure may still be insufficient. In general, the touch panel has to undergo an environmental test such as high temperature and high humidity, and the cable connection part exposed to the outside often leads to poor contact especially after the test. Therefore, it is required to further improve the adhesion of the conductive particles within the range of the crimping force that does not damage the cable or the glass plate. Furthermore, in the above slit structure, excess adhesive cannot be discharged efficiently, which causes a decrease in the adhesion of the conductive particles.

  Another problem related to the reliability of the touch panel is an adverse effect associated with an improvement in the peel strength of the cable. In order to increase the peel strength, an increase in the area of the adhesive part of the cable or the use of a separate reinforcing resin has been conventionally performed. However, in the former case, the cost of the cable is increased by increasing the area of the adhesive part of the cable. There is a drawback that the area of the frame of the touch panel to which the cable is bonded increases and the size of the entire touch panel cannot be reduced. In the latter case, a separate process of applying a reinforcing resin is required, leading to an increase in manufacturing cost and time.

  On the other hand, the connection method of sandwiching the cable shown in FIG. 8 between the glass plate and the film has the advantage that the touch panel can be more compact than the configuration of FIG. Since the film and the film are directly conductively connected without a glass plate, the cable conductor pattern may adversely affect the position detection of the touch panel. That is, as shown in FIG. 9, when the cable 616 is connected to one of the two sides of the film 614 perpendicular to the longitudinal direction of the two electrodes 626a and 626b on the film 614, the electrodes 626a and 626b The equipotential line 628 between them is affected by the potential of the conductor pattern 618 of the cable 616, and the equipotential line on the touch panel 610 is disturbed and does not become a straight line parallel to both electrodes on the film 614. The detection function may be impaired. In order to prevent this problem, insulation printing or etching is performed on the film 614 to which the cable 616 is connected and in the vicinity thereof, so that the potential of the conductor pattern 618 of the cable 616 affects the position detection function of the touch panel. Actions are generally taken to avoid. However, the apparatus for performing the insulating printing or etching process is generally expensive, and has the disadvantage that the number of steps for performing these processes increases.

  In view of the above problems, the present invention has a cable connection structure that further improves the conductive connection state between the conductor pattern of the cable and the land pattern of the glass plate with a crimping force within a range that does not damage the cable and the glass plate. Provide a touch panel. Furthermore, the cable crimping method which can show | play the effect | action similar to the said cable connection structure is provided.

  Moreover, this invention provides the touch panel which has a structure which can raise the peeling strength of a cable, without increasing the connection area of a cable.

  Furthermore, the present invention provides a touch panel having a structure in which a cable and a film are directly conductively connected, and the potential of the conductor pattern of the cable is not touched on the film without performing an insulating process such as insulating printing or etching. Provided is a touch panel having a structure that does not affect the position detection.

  In order to achieve the above object, the invention described in claim 1 is characterized in that a first substrate and a flexible second substrate fixed to each other and facing each other by an adhesive means, and an end portion of the first substrate. A cable bonded and electrically connected to the first substrate and the second substrate, the first substrate having a conductive film, a pair of electrodes electrically connected to the conductive film, and the pair of electrodes And an electrode lead portion that is conductively connected and located at an end of the first base, and the cable has an electrode connection portion that is conductively connected so as to overlap the electrode lead portion by an anisotropic conductive adhesive. In the touch panel, the electrode connection part of the cable and the electrode lead-out part of the first substrate each have a first excision part and a second excision part formed by partially excising each inside, The electrode connection part and the electrode lead-out part The touch panel is configured such that each of the electrode connection portion and the electrode lead-out portion adjacent to the first cut-out portion and the second cut-out portion intersect with each other when overlaid on each other. I will provide a.

  According to a second aspect of the present invention, in the touch panel according to the first aspect, the first cut-out portion and the second cut-out portion are a first slit and a second slit, respectively, and the electrode connecting portion and the electrode Provided is a touch panel in which extending directions of the first slit and the second slit are different from each other when the drawer portions are overlapped with each other.

  A third aspect of the present invention provides the touch panel according to the first or second aspect, wherein the anisotropic conductive adhesive has at least one of a lattice shape and a stripe shape.

  According to a fourth aspect of the present invention, there is provided a first substrate and a flexible second substrate which are fixed to be opposed to each other by an adhesion means, and the first substrate and the first substrate which are bonded to an end portion of the first substrate. A cable electrically connected to the second substrate, the first substrate electrically conductive film, a pair of electrodes electrically connected to the conductive film, and the first substrate electrically connected to the pair of electrodes. And a cable crimping method for a touch panel, wherein the cable has an electrode connection portion that is conductively connected so as to overlap the electrode lead portion by an anisotropic conductive adhesive. Then, in order to electrically connect the electrode lead portion and the electrode connection portion, the first substrate and the cable are crimped by a crimping jig, and the crimping jig presses the first substrate. Press the head and the cable In the cable crimping method having a head, the pressing surface of the second head against the cable has a convex portion, and the portion of the electrode connecting portion that is locally pressed by the convex portion is a part other than the electrode connecting portion. A cable crimping method is provided that is deformed so as to be closer to the first substrate than the portion.

  According to a fifth aspect of the present invention, there is provided a first substrate and a flexible second substrate which are fixed to be opposed to each other by an adhesive means, and a conductive connection cable which is bonded to an end portion of the first substrate. The touch panel further includes: a touch panel, wherein the bonding means further bonds a part of the cable bonded to the first substrate to the second substrate.

  According to a sixth aspect of the present invention, the first substrate and the flexible second substrate that are fixed to be opposed to each other by the bonding means, and the first substrate and the end of the second substrate are the first substrate. In a touch panel having a cable bonded between the substrate and the second substrate and electrically connected to the first substrate and the second substrate, the second substrate is a bonding portion between the second substrate and the cable. A long and narrow cut portion provided between the position detection region of the touch panel and the adhesive portion, and the length of the cut portion extends at least of the cut portion of the adhesive portion. Provided is a touch panel characterized by being longer than a length in a direction.

  According to a seventh aspect of the present invention, the first substrate and the flexible second substrate fixed to be opposed to each other by the bonding means, and the first substrate and the first substrate at the end of the second substrate. A cable bonded between the substrate and the second substrate and electrically connected to the first substrate and the second substrate, the second substrate being electrically conductive and a pair electrically connected to the electrically conductive film A touch panel having an electrode connecting portion electrically connected to the pair of electrodes and positioned at an end portion of the second base, and the cable being electrically connected to the electrode leading portion. In the touch panel, the electrode lead-out portion of the second substrate and the electrode connection portion of the cable are provided so as to be located outside the first substrate.

  According to the present invention, a cut portion is provided in each of the electrode connection portion of the cable and the electrode lead-out portion of the first substrate, the area of the substantial conduction portion between the cable and the first substrate is reduced, and the substantial conduction portion A touch panel having a structure that makes the conductive connection between the cable and the first substrate more reliable by enhancing the adhesion of the anisotropic conductive adhesive to the substantially conductive portion of the conductive particle is provided.

  Moreover, according to the cable crimping method according to the present invention, even when the electrode connection portion of the cable and the electrode lead-out portion of the first substrate do not have the cut portion or slit as described above, the cable has the cut portion or slit. A conductive connection state similar to or similar to the case is obtained.

  According to the present invention, it is possible to obtain a higher cable adhesive strength or peel strength without requiring an increase in the area of the connection portion or the use of a separate reinforcing resin for bonding the cable to the first substrate.

  According to the present invention, in the touch panel in which the cable and the flexible second substrate are directly connected to each other, it is possible to eliminate the influence of the potential of the conductor pattern of the cable on the position detection of the touch panel.

  ADVANTAGE OF THE INVENTION According to this invention, the area where a cable adhere | attaches on a 1st board | substrate can be reduced, and the frame of a touch panel can be narrowed, ie, a touch panel can be reduced in size.

Hereinafter, the present invention will be described in detail with reference to the drawings.
First, a description will be given of a method for further ensuring the electrical connection between the conductor pattern of the cable and the land pattern of the glass plate.
As shown in FIG. 1 (a) or (b), the touch panel 10 according to the first embodiment of the present invention includes a first substrate 12 fixed to be opposed to each other by an adhesive means 11 such as a double-sided tape. And a flexible second substrate 14. The first substrate 12 is a glass plate having a conductive coating such as an indium-tin oxide coating (hereinafter abbreviated as ITO) and a pair of electrodes that are conductively connected to the conductive coating, and the second substrate 14 is, for example, ITO. And a pair of electrodes that are conductively connected to the conductive film. The glass plate 12 further has a land pattern 20 that is electrically connected to the electrodes of the glass plate 12 and the film 14 and is located at the end of the glass plate 12. The touch panel 10 further includes a cable 16 having a conductor pattern 18 that is conductively connected so as to overlap the land pattern 20 of the glass plate 12.

  The conductor pattern 18 of the cable 16 and the land pattern 20 of the glass plate 12 are bonded to each other by an anisotropic conductive adhesive 50. More specifically, each of the four electrode connection portions 18a to 18d included in the conductor pattern 18 is connected to each of the four electrode lead-out portions 20a to 20d included in the land pattern 20 (for example, the electrode connection portion 18a and The electrode lead portion 20a is connected). Here, each electrode connection part 18a-18d of the conductor pattern 18 has the 1st excision part formed by partially cutting out the inside of each electrode connection part 18a-18d. A preferred specific example of the first cut portion is a slit as shown in FIG. 1 (a) or (b). Further, the electrode lead portions 20a to 20d of the land pattern 20 are also shown as second cut portions (preferably shown in FIG. 1 (a) or (b)) formed by partially cutting the inside of the electrode lead portions 20a to 20d. However, the portions adjacent to the first and second cut portions, that is, the substantially conductive portions, intersect each other when the conductor pattern 18 of the cable 16 and the land pattern 20 of the substrate 12 are overlapped with each other. For example, in the illustrated example, the slits of the electrode lead portions 20a to 20d extend in a different direction from the slits of the electrode connection portions 18a to 18d. 1A and 1B are different from each other in that the slit direction is different.

Each of the electrode connection portions 18a to 18d and the electrode lead portions 20a to 20d has a slit or strip shape, and the extending directions of both slits are different from each other, so that the conductive connection state is much better than before. Is obtained. The reason will be described below.
The crimping force applied to the cable 16 and the glass plate 12 is not uniformly applied to all of the many conductive particles 52 included in the anisotropic conductive adhesive 50 between them. More specifically, for example, as shown in FIGS. 2A and 2B, a portion adjacent to the slit of the electrode connection portion 18 b of the conductor pattern 18 and the electrode lead-out portion 20 b of the land pattern 20 overlaps each other or substantially. A large pressing force is applied to the conductive particles 52a in the vicinity of the conductive portion 22, but no large pressing force is applied to the conductive particles 52b in the vicinity of the other portion 24. Since the area of the substantially conductive portion 22 is considerably smaller than the case where the slit has only one or both of the electrode connecting portion 18b and the electrode leading portion 20b, the conductive particles 52a in the vicinity of the portion 22 Such a pressing force is remarkably increased. Therefore, in order to prevent the cable 16 and the glass plate 12 from being damaged, the conductive particles 52a strongly adhere to the electrode connection portion 18b and the electrode lead-out portion 20b in the substantial conduction portion 22 even if the entire crimping force is below a certain value. Thus, a good conductive connection state of the electrode connecting portion 18b and the electrode lead-out portion 20b can be obtained. The good conductive connection state obtained in this way is hardly impaired even after a high-temperature and high-humidity environmental test, and is therefore excellent in stability over time.

  The slit directions of the electrode connecting portions 18a to 18d and the electrode lead portions 20a to 20d may be orthogonal to each other as shown in FIGS. 1 (a), 1 (b) and 2 (a). You may cross at other angles, such as 45 °. At any angle, a high pressure bonding force, that is, a high adhesion force of the conductive particles can be obtained at a portion where the portions adjacent to both slits intersect, that is, a substantially conductive portion.

  Further, the electrode connecting portions 18a to 18d or the electrode lead portions 20a to 20d have a slit shape, such as the conductive portion 52c shown in FIG. There is also an advantage that the conductive particles easily bite into the vicinity of the boundary with the portion 24. This also improves the conductive adhesive property of the conductive adhesive 50.

  A further advantage of the electrode connecting portions 18a to 18d or the electrode lead portions 20a to 20d having a slit shape is that excess conductive adhesive is easily discharged. As in the electrode connection portions 18a to 18d in FIG. 1A and the electrode lead portions 20a to 20d in FIG. 1B, slits are formed in a certain direction (preferably in a direction where there is no adjacent electrode connection portion or electrode lead portion). By opening, excess conductive adhesive can be discharged from the openings 19a to 19d and 21a to 21d. The discharge of excess adhesive facilitates proper arrangement of the conductive particles in the adhesive, and more reliable conductive bonding between the electrode connecting portion and the electrode lead-out portion.

  In the present embodiment, the electrode connection part of the cable and the electrode lead part of the glass plate are both described as having slits, but the substantially conductive part when the electrode connection part and the electrode lead part are connected is described. As long as the area is much smaller than the area defined by the outline of the electrode connection part or the electrode lead-out part, it may have a cut-out part other than the slit. Specific examples of such a cut portion include, for example, a lattice shape, an annular shape, a spiral shape, a radial shape, a similar shape thereof, or a combination thereof.

  The anisotropic conductive adhesive 50 used may be a uniform sheet or a tape as in the conventional case (FIG. 7C), but in order to suppress the discharge amount of excess adhesive. It is effective to have a stripe shape as shown in FIG. 1 (a) or a lattice shape as shown in FIG. 1 (b). As a result, the total amount of adhesive used is reduced, and the amount of unnecessary adhesive discharged from the connecting portion when being crimped can be reduced. As a method of forming a striped or grid-like conductive adhesive as shown in FIG. 1A or 1B, for example, screen printing is possible. The grid-like conductive adhesive may be provided as a single-sided or double-sided adhesive tape.

  In addition to the structure having the slits described above, a jig for crimping the cable and the glass plate to each other can be used as a method for generating a strong part and a weak part in the electrode connection part or electrode lead part. A method of providing a convex portion is possible. As shown in FIG. 3A, the crimping jig 60 used for crimping the glass plate 512 and the cable 516 of the conventional touch panel 510 described above includes a first crimping head 62 that presses the cable 516 and the first crimping head 62. And a second pressure-bonding head 64 that presses the glass plate 512. Further, the first pressure-bonding head 62 has several convex portions 66 that partially press the cable 516 as shown in FIG. The portion of the cable 516 that is locally pressed by the convex portion 66 is deformed as shown in FIG. 3B, and the electrode connecting portion 518 at the portion that is pressed along with the deformation is also more glass than the other portion. Therefore, the conductive particles of the conductive adhesive in the pressed part receive a higher pressing force than other parts. Accordingly, the conductive particles in the pressed portion are more strongly adhered to the conductive portion, and as a result, a good conductive connection state is obtained as the entire connection portion.

The structure and method for improving the conductive connection state of the cable have been described so far in order to improve the reliability of the touch panel. Next, the cable connection structure for increasing the peel strength of the cable with respect to the glass plate will be described.
As shown in FIGS. 4A and 4B, the touch panel 110 according to the second embodiment of the present invention is separated by a certain distance by an adhesive means 111 such as a double-sided tape, like the touch panel 10 described above. It has a rigid first substrate 112 and a flexible second substrate 114 that face each other. The first substrate 112 is, for example, a glass plate having ITO, and the second substrate 114 is, for example, a film having ITO. The first substrate 112 may be a film having ITO. The touch panel 110 further includes a cable 116 attached to the end of the glass plate 112. The cable 116 is an FPC. The cable 116 has a conductor pattern 118 for conductively connecting to a land pattern 120 on the glass plate 112, which is connected to lead lines from electrodes of the glass plate 112 and the film 114.

  The cable 116 is attached to the glass plate 112 by bonding a portion other than the conductor pattern 118 of the cable 116 to a portion other than the land pattern 120 of the glass plate 112 using an appropriate general-purpose adhesive 119 or the like. . Here, in order to increase the peel strength of the cable 116 from the glass plate 112, as shown in FIG. 4A, a part of the double-sided tape 111 and the film for separating the glass plate 112 and the film 114 from each other and facing each other. 114 can be extended to at least partially bond film 114 and cable 116 together. According to this configuration, the peel strength of the cable 116 can be remarkably increased without requiring a separate reinforcing resin or the like, and the film 114 and the cable 116 are bonded to each other between the glass plate 112 and the film 114. Since it can be performed at the same time as fixing, no additional steps are required. Further, it is not necessary to increase the size of the bonding portion of the cable 116. Therefore, the peel strength of the cable 116 can be greatly improved without increasing costs except that the amount of double-sided tape to be used is slightly increased.

Next, in the touch panel in which the cable is bonded and disposed so as to be sandwiched between the glass plate and the film as shown in FIG. 8, the disturbance of equipotential lines on the touch panel due to the influence of the conductor pattern of the cable is prevented. The structure for this will be described.
The touch panel 210 of the third embodiment shown in FIG. 5 includes a first substrate 212 and a second substrate 214 that are fixed to face each other apart from each other. The first substrate 212 is a glass plate having a conductive film such as ITO and a pair of electrodes conductively connected to the conductive film, and the second substrate 214 is conductively connected to a conductive film such as ITO and the conductive film. A film having a pair of electrodes 226a and 226b. Touch panel 210 further includes a cable 216 arranged to be sandwiched between glass plate 212 and film 214, similar to the conventional touch panel described above with reference to FIG. The cable 216 is an FPC having a conductor pattern (not shown), and is connected to one of two sides of the film 214 perpendicular to the longitudinal direction of the pair of electrodes 226a and 226b on the film 214. The conductor pattern has four electrode connections (not shown). Two of the four electrode connection portions are conductively connected to a land pattern (not shown) formed on one surface of the cable 216 and conductively connected to the electrode of the glass plate 212, and the remaining two electrode connection portions Is conductively connected to a land pattern (not shown) formed on the other surface of the cable 216 and conductively connected to the electrodes 226a and 226b of the film 214.

  The film 214 is shown in FIG. 5 so that the equipotential lines 228 between the pair of electrodes 226a and 226b on the film 214 are not disturbed by the influence of the two electrode connections connected to the film 214. Such an elongated cut or cut 224. The cutout portion 224 is provided in the vicinity of the bonding portion between the cable 216 and the film 214 and between the position detection region of the touch panel 210 and the bonding portion, and preferably extends substantially perpendicular to the electrodes 226a and 226b of the film 214. It has a rectangular or slit shape. Further, the cutout portion 224 has at least a length longer than the length L of the bonding portion in the extending direction of the cutout portion 224, and preferably extends to the immediate vicinity of the pair of electrodes 226a and 226b. The cut portion 224 substantially blocks the influence of the conductor pattern of the cable 216, and the disturbance of the equipotential line 228 on the film 214 is eliminated. Further, the cut-out portion 224 preferably has a width of 0.1 mm or more, but may be a cut-out portion having substantially no width, for example, a portion formed by a blade for cutting the film 214. In this case, the film portions on both sides separated by the cut portion may contact each other, but even in that case, the conduction resistance is considerably larger than the case where there is no cut portion, and the equipotential line is disturbed. It is because it does not reach. Providing such a cutout or cutout 224 in the film 214 has an effect equivalent to that of conventional insulating printing or etching on the film, and is much simpler and more expensive than those. It is not necessary.

  Further, further miniaturization of the touch panel described above can be realized by changing the arrangement of the electrode connection portions included in the conductor pattern of the cable. Except for the cable and its attachment, the touch panel 310 of the fourth embodiment similar to the touch panel 210 described above includes a connection cable 316 provided with a conductor pattern 318, as shown in FIGS. 6 (a) and 6 (b). Have. Further, of the four electrode connection portions 318a to 318d included in the conductor pattern 318, the electrode connection portions 318a and 318c are connected to the electrode extraction portion 320 of the glass plate 312 and are connected to the electrode extraction portion 322 of the film. 318 b and 318 d are configured to be located outside the glass plate 312 of the touch panel 310. In this case, the electrode lead-out portion 322 of the film 314 disposed to face the glass plate 312 is also provided outside the glass plate 312 corresponding to the electrode connection portions 318b and 318d. With such a configuration, the area of the portion where the cable 316 is bonded to the glass plate 312 can be reduced, and the frame of the touch panel 310 can be narrowed, that is, the touch panel can be downsized.

  Of course, the structure of the cable and the cable connecting portion according to the present invention can be applied not only as a constituent element of a touch panel as described above but also to an image display device such as a liquid crystal display.

(A) It is a schematic plan view of the touch panel of 1st Embodiment, (b) It is a disassembled perspective view of the cable connection part of the touch panel of (a), (c) In (b), an electrode connection part and an electrode extraction part It is the figure which changed the slit direction. (A) It is a schematic enlarged view of the conduction | electrical_connection connection part of the cable of the touchscreen of 1st Embodiment, (b) It is a schematic sectional drawing in the bb line | wire of (a). (A) It is a figure which shows a part of jig | tool for cable crimping which concerns on this invention, (b) It is a figure which shows the cable which was pressed by the jig | tool for crimping of (a), and deform | transformed locally. (A) It is a schematic plan view of the touch panel of the 2nd Embodiment of this invention, (b) It is sectional drawing of the cable connection part of the touch panel of (a). It is a schematic plan view of the touch panel of 3rd Embodiment. (A) In the touch panel of 4th Embodiment, it is a figure which shows the example of a change of arrangement | positioning of the electrode connection part of a cable, (b) It is a schematic sectional drawing in the bb line of (a). (A) It is a schematic plan view of the conventional touch panel, (b) It is sectional drawing of the cable connection part of the touch panel of (a), (c) It is an exploded perspective view of the cable connection part of the touch panel of (a). It is sectional drawing of the cable connection part of the conventional touch panel which arrange | positions a cable between a glass plate and a film. It is a figure explaining the influence of the conventional cable with respect to the position detection function of a touch panel.

Explanation of symbols

10, 110, 210, 310, 510, 610 ... touch panel 12, 112, 212, 312, 512, 612 ... glass plate 14, 114, 214, 314, 514, 614 ... film 16, 116, 216, 316, 516, 616: Cable 18, 118, 318, 518, 618 ... Conductor pattern 20, 120, 320, 520, 620 ... Land pattern 50, 550 ... Anisotropic conductive adhesive 52 ... Conductive particle 60 ... Crimping jig 62, 64 ... Crimping head

Claims (7)

A first substrate and a flexible second substrate fixed to be opposed to each other by an adhesive means, and bonded to an end portion of the first substrate to be electrically connected to the first substrate and the second substrate. The first substrate has a conductive coating, a pair of electrodes that are conductively connected to the conductive coating, and an electrode lead-out portion that is conductively connected to the pair of electrodes and located at an end of the first substrate In the touch panel, the cable has an electrode connection portion that is conductively connected so as to overlap the electrode lead portion by an anisotropic conductive adhesive,
The electrode connection part of the cable and the electrode lead-out part of the first substrate each have a first excision part and a second excision part formed by partially excising each inside, and the electrode connection part And each of the electrode connecting portion and the electrode leading portion adjacent to the first cut portion and the second cut portion intersect each other when the electrode lead portions are overlapped with each other. A touch panel characterized by   The first excision part and the second excision part are respectively a first slit and a second slit, and the first slit and the second slit when the electrode connection part and the electrode lead-out part overlap each other. The touch panel according to claim 1, wherein the two slits extend in different directions.   The touch panel according to claim 1 or 2, wherein the anisotropic conductive adhesive has at least one of a lattice shape and a stripe shape. A first substrate and a flexible second substrate fixed to be opposed to each other by an adhesive means, and bonded to an end portion of the first substrate to be electrically connected to the first substrate and the second substrate. The first substrate has a conductive coating, a pair of electrodes that are conductively connected to the conductive coating, and an electrode lead-out portion that is conductively connected to the pair of electrodes and located at an end of the first substrate And the cable has an electrode connection portion that is conductively connected so as to overlap the electrode lead portion by an anisotropic conductive adhesive, wherein the electrode lead portion and the electrode In order to electrically connect the connecting portion, the first substrate and the cable are crimped by a crimping jig, and the crimping jig presses the first head that presses the first substrate and the second that presses the cable. Cave with head In the crimping method,
The pressing surface of the second head against the cable has a convex portion, and the portion of the electrode connection portion that is locally pressed by the convex portion is closer to the first substrate than the other portion of the electrode connection portion. A cable crimping method characterized by being deformed so as to approach. In a touch panel having a first substrate and a flexible second substrate fixed to be opposed to each other by an adhesive means, and a conductive connection cable bonded to an end portion of the first substrate,
The touch panel, wherein the bonding means further bonds a part of the cable bonded to the first substrate to the second substrate. A first substrate and a flexible second substrate fixed to be opposed to each other by bonding means; and between the first substrate and the second substrate at an end of the first substrate and the second substrate. In a touch panel having a cable bonded and electrically connected to the first substrate and the second substrate,
The second substrate has an elongated cut portion provided in the vicinity of the bonding portion between the second substrate and the cable and between the position detection region of the touch panel and the bonding portion. The length of a part is longer than the length to the direction where the said notch part extends at least of the said adhesion part, The touch panel characterized by the above-mentioned. A first substrate and a flexible second substrate fixed to be opposed to each other by bonding means; and between the first substrate and the second substrate at an end of the first substrate and the second substrate. A cable bonded and electrically connected to the first substrate and the second substrate, the second substrate having a conductive coating, a pair of electrodes conductively connected to the conductive coating, and the pair of electrodes In the touch panel, having an electrode lead portion that is conductively connected and located at an end of the second base, and the cable has an electrode connection portion that is conductively connected to the electrode lead portion,
The touch panel, wherein the electrode lead-out portion of the second substrate and the electrode connection portion of the cable are provided so as to be located outside the first substrate.

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