JP2010108038A - Touch panel, manufacturing method thereof, and touch panel display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a highly transparent touch panel, and to achieve high repair property by using the physical property of silicon gel or silicon rubber. <P>SOLUTION: This touch panel includes: a first substrate on which a plurality of first signal lines and a plurality of second signal lines crossing the first signal lines are formed; and a second substrate arranged at the touch face side of the first substrate, wherein an impact-resistant adhesive layer is formed by hardening liquid adhesive composition, and the first substrate and the second substrate are arranged so as to be opposed to each other through the impact-resistant adhesive layer, and the impact-resistant adhesive layer is formed of silicon gel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a touch panel, a manufacturing method thereof, and a touch panel display device, and more particularly to a capacitively coupled touch panel.

  A touch panel is a device that inputs information interactively to an information processing device such as a computer by touching (pressing) with a finger, a pen, or the like. The touch panel is classified into a resistance film method, a capacitive coupling method, an infrared method, an ultrasonic method, an electromagnetic induction coupling method, and the like according to the operation principle. Among them, resistive film type and capacitive coupling type touch panels that can be mounted at low cost are often used in recent years.

  The resistive film type touch panel, for example, is provided as a resistive film on the entire inner surface of each glass substrate, a pair of glass substrates arranged opposite to each other, an insulating spacer sandwiched between the pair of glass substrates It is composed of a transparent conductive film and a touch position detection circuit. The touch panel is used by being mounted on the front surface of a display screen such as a liquid crystal display device. In the resistive film type touch panel having such a configuration, when the front surface of the display screen is touched, the resistive films come into contact with each other (short circuit), and current flows between the resistive films. The touched position is detected by detecting the voltage change at this time by the touch position detection circuit. However, a resistive film type touch panel has a drawback that a pair of resistive films are arranged opposite to each other with an air layer interposed therebetween, so that a difference in refractive index is increased by the air layer and light transmittance is decreased. is doing. In addition, it has a drawback that durability (life) is low because of detection accompanied by physical deformation.

  Next, a capacitive coupling type touch panel will be described.

  FIG. 1 is a schematic cross-sectional view of a touch panel display device having a general capacitive coupling type touch panel, and FIG. 2 is a perspective view of the touch panel display device having a general capacitive coupling type touch panel. The touch panel display device 1 includes a liquid crystal panel 17, a backlight module 14 provided on the lower side of the liquid crystal panel 17 through the polarizing plate 8 and the diffusion sheet 9, and a polarization on the upper side of the liquid crystal panel 17 in the figure. And a touch panel 18 provided via the plate 2. The touch panel 18 has a transparent electrode 41 for position detection on the liquid crystal panel 17 side, and is fixed to the liquid crystal panel 17 by an adhesive layer 15 such as a double-sided tape.

  The touch panel 18 includes a glass substrate 40, a position detection transparent electrode 41 provided on the entire surface of the glass substrate 40, and a position detection electrode 41 provided at a constant pitch on the periphery of the position detection transparent electrode 41. And a position detection circuit for detecting the touch position. In the touch panel 18, by touching the front surface of the display screen, that is, the surface of the light-transmitting substrate 42, the position detection transparent electrode 41 is grounded via the capacitance of the human body at the touched point. A change occurs in the resistance value between the position detection electrode 41 and the grounding point. By detecting this change by the touch position detection circuit, the touched position is detected. In the configuration of FIG. 1, the liquid crystal panel 17 includes a liquid crystal 5, a color filter substrate 12 and a TFT substrate 13 that are arranged to face each other with the liquid crystal 5 interposed therebetween. The TFT substrate 13 has a configuration in which the polarizing plate 8, the TFT substrate glass 7, and the TFT element layer 6 are sequentially laminated from the backlight module 14 side. The color filter substrate 12 has a configuration in which a color filter (RGB) layer 4, a color filter substrate glass 3, and a polarizing plate 2 are sequentially laminated from the liquid crystal 5 side.

  In such a capacitively coupled touch panel display device 1, the number of glass substrates is one less than that of the resistive film type touch panel described above, and the air between the glass substrates existing in the resistive film type touch panel. Since there is no layer, the light transmittance is excellent.

  As an example of a capacitively coupled touch panel, Patent Document 1 discloses a glare-preventing method using a transparent adhesive on the touch surface side of a first transparent substrate provided with a transparent conductive film for touch position detection. A capacitively coupled touch panel configured by bonding a second transparent substrate is disclosed. According to the technique described in this patent document, it is described that damage to the transparent conductive film can be prevented and productivity can be improved.

  However, in the type of touch panel display device that is used by attaching the touch panel as described above to the front surface of the display screen, it is necessary to attach the touch panel itself to the front surface of the display screen, which increases the thickness and weight of the entire device. Or there was a problem that it costs. Therefore, in order to reduce the thickness and weight of the device, it is known to omit the glass substrate and the position detection transparent electrode constituting the touch panel by sharing them with the members constituting the display device.

  In Patent Document 2, a common transparent electrode, a liquid crystal, and a display transparent electrode are sequentially laminated between two transparent insulating plates, and are arranged on the side of the common transparent electrode where characters and images are displayed and a contact object such as a finger contacts. In order to detect the position coordinates of the contact part on the transparent insulating plate, current detectors are installed at the four corners of the common transparent electrode to detect the current flowing between the contact object and the common transparent electrode via the transparent insulating plate. A signal processing circuit is provided for calculating the position coordinates of the contact portion based on the current signals from the current detectors at the four corners affected by the change in capacitance caused by the contact object contacting the contact portion on the transparent insulating plate. A capacitively coupled touch panel device is described.

Further, Patent Document 3 discloses a display device provided with an active matrix substrate having a plurality of pixel electrodes arranged in a matrix and a transparent counter electrode opposed to the active matrix substrate, with respect to the transparent counter electrode. Liquid crystal display circuit for supplying a voltage or current for use, a position detection circuit for detecting current flowing from a plurality of locations of the transparent counter electrode, and a switching circuit for electrically connecting one of these circuits to the transparent common electrode A touch sensor integrated display device comprising: For this reason, photolithography is the mainstream for the insulating film forming method of the capacitive touch panel because of the need to form through holes for conduction. Patent Document 4 uses a resist material made of a photosensitive resin having a thickness of about several hundred μm.
JP-A-5-324203 JP 2003-99192 A JP 2003-66417 A JP 2008-134975 A

  Unlike conventional resistive touch panel display devices, the capacitive touch panel display device has a structure in which an insulating film and a transparent conductive film are laminated, so that the touch surface strength, scratch resistance, keystroke resistance, etc. In order to ensure, it is necessary to form a hard coat layer after laminating an insulating film and a transparent conductive film, or to attach a light-transmitting substrate 42 such as a glass substrate or a plastic substrate.

  When a glass substrate or a plastic substrate is bonded as a protective film, there is a method of fixing the touch panel display device and the light transmissive substrate 42 with an outer frame. When only the outer frame is fixed, the display area becomes the air layer 16, and the transmittance of the display area is reduced due to reflection of external light by the interface between the substrate and the air layer.

  In addition, when the method of fixing the touch panel display device and the light-transmitting substrate 42 over the entire surface is adopted, it can be bonded with a transparent adhesive sheet, and the transmittance of the display area does not decrease.

  However, after a touch panel display device is mounted on a mobile phone, a digital camera, or the like, if a problem occurs in the light-transmitting substrate 42, the touch panel display device can be repaired by replacing it with a transparent one. In the case of the adhesive sheet, there is a problem that the insulating film and the transparent conductive film are also destroyed when the light-transmitting substrate 42 is peeled off.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to make it possible to form a highly transparent touch panel by utilizing the physical properties of silicone gel and to realize high repairability.

  Another object of the present invention is to make it possible to form a highly transparent touch panel by utilizing the physical properties of silicone rubber and to realize high repairability.

  Other objects of the present invention will become apparent from the description of the entire specification.

  In order to solve the above problem, a first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting with the first signal lines are formed, and the touch of the first substrate It is a touch panel provided with the 2nd board | substrate arrange | positioned at the surface side, Comprising: The impact-resistant adhesive layer formed by hardening | curing a liquid adhesive composition is provided, and the said 1st board | substrate and the said 2nd board | substrate are the said impact-resistant adhesive layer. Is a touch panel in which the impact-resistant adhesive layer is formed of silicone gel.

  In order to solve the above problem, a first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting with the first signal lines are formed, and the touch of the first substrate It is a touch panel provided with the 2nd board | substrate arrange | positioned at the surface side, Comprising: The impact-resistant adhesive layer formed by hardening | curing a liquid adhesive composition is provided, and the said 1st board | substrate and the said 2nd board | substrate are the said impact-resistant adhesive layer. Is a touch panel in which the impact-resistant adhesive layer is formed of silicone rubber.

  In order to solve the above problem, a display having a plurality of drain lines and a plurality of gate lines intersecting with the drain lines, and a region surrounded by the drain lines and the gate lines being a pixel region A first substrate on which a panel, a plurality of first signal lines, and a plurality of second signal lines intersecting with the first signal lines are formed, and disposed on the touch surface side of the first substrate The second substrate and an impact-resistant adhesive layer formed by curing the liquid adhesive composition, wherein the first substrate and the second substrate are disposed to face each other via the impact-resistant adhesive layer, It is a touch panel display device provided with the touch panel by which an impact-resistant adhesion layer is formed with a silicone gel.

  In order to solve the above problem, a display having a plurality of drain lines and a plurality of gate lines intersecting with the drain lines, and a region surrounded by the drain lines and the gate lines being a pixel region A first substrate on which a panel, a plurality of first signal lines, and a plurality of second signal lines intersecting with the first signal lines are formed, and disposed on the touch surface side of the first substrate The second substrate and an impact-resistant adhesive layer formed by curing the liquid adhesive composition, wherein the first substrate and the second substrate are disposed to face each other via the impact-resistant adhesive layer, It is a touch panel display device provided with the touch panel in which an impact-resistant adhesion layer is formed with silicone rubber.

  In order to solve the above problem, a first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting with the first signal lines are formed, and the touch of the first substrate A touch panel manufacturing method comprising a second substrate disposed on a surface side and an impact-resistant adhesive layer formed by curing a liquid adhesive composition, wherein the liquid adhesive composition is a touch surface side of the first substrate or Formed in the step of applying to the opposite surface side of the second substrate, a curing step of curing the applied liquid adhesive composition by irradiation or heating to form an impact-resistant adhesive layer, and the curing step It is a method for manufacturing a touch panel, which includes a step of bonding the touch surface side of the first substrate and the opposite surface side of the second substrate with an impact-resistant adhesive layer, and the impact-resistant adhesive layer is made of silicone gel.

  In order to solve the above problem, a first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting with the first signal lines are formed, and the touch of the first substrate A touch panel manufacturing method comprising a second substrate disposed on a surface side and an impact-resistant adhesive layer formed by curing a liquid adhesive composition, wherein the liquid adhesive composition is a touch surface side of the first substrate or Formed in the step of applying to the opposite surface side of the second substrate, a curing step of curing the applied liquid adhesive composition by irradiation or heating to form an impact-resistant adhesive layer, and the curing step A touch panel manufacturing method comprising a step of bonding the touch surface side of the first substrate and the opposite surface side of the second substrate with an impact-resistant adhesive layer, wherein the impact-resistant adhesive layer is made of silicone rubber.

  Since the touch panel of the present invention has a configuration utilizing the physical properties of silicone gel or silicone rubber, a highly transparent touch panel can be formed and high repairability can be realized.

  Other effects of the present invention will become apparent from the description of the entire specification.

  Hereinafter, an example of an embodiment to which the present invention is applied will be described with reference to the drawings. However, in the following description, the same components are denoted by the same reference numerals, and repeated description is omitted.

<Embodiment 1>
<overall structure>
FIG. 3 is a schematic cross-sectional view for explaining a schematic configuration of the touch panel display device according to the first embodiment of the present invention. However, the touch panel display device 100 shown in FIG. 3 is the same as the conventional touch panel device except for the configuration of the touch panel 18. Therefore, in the following description, the configuration of the touch panel 18 will be described in detail.

  As is clear from FIG. 3, the touch panel display device 100 according to the first embodiment includes a liquid crystal panel 17 and a backlight module 14 provided on the lower side of the liquid crystal panel 17 in the figure via a polarizing plate 8 and a diffusion sheet 9. And a touch panel 18 provided on the upper side of the liquid crystal panel 17 through the polarizing plate 2. The liquid crystal panel 17 includes a liquid crystal 5, a color filter substrate 12 and a TFT substrate 13 that are arranged to face each other with the liquid crystal 5 interposed therebetween. The TFT substrate 13 has a configuration in which the polarizing plate 8, the TFT substrate glass 7, and the TFT element layer 6 are sequentially laminated from the backlight module 14 side. The color filter substrate 12 has a configuration in which a color filter (RGB) layer 4, a color filter substrate glass 3, and a polarizing plate 2 are sequentially laminated from the liquid crystal 5 side.

  The touch panel 18 according to the first embodiment includes a touch panel substrate (first substrate) 40 on which a position detection transparent electrode 41 is formed on the side opposite to the liquid crystal panel 17, that is, on the touch surface side of the touch panel 18. The touch panel substrate 40 is fixed to the liquid crystal panel 17 by an adhesive layer 15 such as a double-sided tape. That is, the touch panel 18 includes a touch panel substrate 40, a position detection transparent electrode 41 provided on the entire surface of the touch panel substrate 40, and position detection electrodes provided at a constant pitch on the periphery of the touch panel substrate 40. 41 and a position detection circuit (not shown) for detecting the touch position. In the touch panel 18 according to the first embodiment, a light-transmitting substrate (second substrate) 42 is fixed to the front surface, that is, the touch surface side via the impact-resistant adhesive layer 50. In the touch panel display device 100 having the touch panel 18 configured as described above, the position detection transparent electrode 41 is touched by touching the front surface of the display screen, that is, the surface of the light transmissive substrate 42. Since it is grounded via the capacitance, a change occurs in the resistance value between each position detection electrode 41 and the grounding point. By detecting this change by the touch position detection circuit, the touched position is detected.

<Touch panel configuration>
FIG. 4 is a schematic cross-sectional view for explaining a schematic configuration of the touch panel according to the first embodiment of the present invention, and FIG. 5 is a schematic plan view for explaining a schematic configuration of the touch panel according to the first embodiment of the present invention.

  As shown in FIG. 4, the touch panel display device 100 according to the first embodiment includes a transparent conductive film (second signal line) for detecting a position on one surface (touch surface side) of a light-transmissive touch panel substrate 40. ) 20 and a transparent conductive film (first signal line) 10 to which a signal is supplied are arranged via an insulating film layer 30. However, the touch panel substrate 40 may be soda glass, alkali glass such as borosilicate glass, or non-alkali glass. Further, not only a glass substrate but also a plastic substrate may be used. It is also possible to use chemically strengthened glass.

  In addition, an impact-resistant adhesive layer 50 is formed above the transparent conductive film 20, and a light-transmitting substrate 42 is formed above the impact-resistant adhesive layer 50. A metal terminal portion 21 for electrically connecting a driver IC (not shown) for the touch panel and the transparent conductive films 10 and 20 is formed at an end portion of one side of the touch panel substrate 40. Both ends of the transparent conductive films 10 and 20 are respectively connected to the extraction electrode 22 around the substrate 40, and each extraction electrode 22 is connected to the terminal portion 21. The lead electrode 22 is made of metal, but is not limited to this, and a transparent conductive film may be used.

  As shown in FIG. 5, each thin film layer laminated in this manner has a plurality of transparent conductive films 10 extending in the horizontal direction in the region in the region shown as the functional unit 24 functioning as a touch panel. The structure is formed. In addition, a plurality of transparent conductive films 20 extending in the horizontal direction in the figure in the region of the functional unit 24 are formed side by side in the vertical direction. A driver connection portion 23 is provided at the right end portion of the touch panel substrate 40 in the figure, and a terminal portion 21 is formed. One end of the extraction electrode 22 is electrically connected to each terminal portion 21, and the other end of the extraction electrode 22 is electrically connected to one of the plurality of transparent conductive films 10 and 20. It has a configuration. At this time, as is apparent from FIG. 5, each extraction electrode 22 is formed in the outer region of the functional unit 24. In order to clearly show whether the extraction electrode 22 is connected to the transparent conductive film 10 or the transparent conductive film 20, the same pattern as that of the transparent conductive films 10 and 20 is shown in FIG. 22 is also illustrated.

<Method for forming touch panel>
Hereinafter, based on FIG.4 and FIG.5, the formation procedure of the touch panel 100 of Embodiment 1 is demonstrated.

  As the transparent conductive film 10, a transparent conductive film (thickness 50 to 200 mm) made of an amorphous ITO (Indium Tin Oxide) film or an IZO (Indium Zinc Oxide) film is used so that the surface resistance is 500 to 2000Ω. Then, a film is formed by a sputtering method, and then a resist material is applied and patterned by an exposure and development process. At this time, the resist material may be either a positive type or a negative type, and an alkali development type can be easily formed. Thereafter, ITO is patterned by etching. As the etching solution at this time, a hydrobromic acid aqueous solution or the like may be selected.

  As the insulating film layer 30, various thicknesses can be selected in consideration of the dielectric constant of the insulating film material, but it is easy to adjust the insulating film layer with a relative dielectric constant of 3 to 4, and the film thickness is 1 to 20 μm. Can be formed. As a material for the insulating film layer, a UV (ultraviolet) curable resin material, an alkali developable negative or positive insulating film material, and a thermosetting resin material cured by heating can be used. Can be easily formed. However, the visible light region (400 nm to 800 nm) transmittance of the insulating film layer 30 is preferably 90% or more so as not to lower the performance of the image display device used simultaneously with the touch panel display device 100. Furthermore, since the insulating film layer 30 has a structure formed directly on the transparent conductive film 20 or the substrate 40, the transparent conductive film 20 and the transparent conductive film 40, and the insulating film layer interposed therebetween have display quality. In order to prevent the decrease, it is desirable to form it as thin as possible.

  Further, a transparent conductive film (thickness 50 to 200 mm) made of an amorphous ITO film or an IZO (Indium Zinc Oxide) film is formed on the insulating film layer 30 by a sputtering method so that the surface resistance is 500 to 2000Ω. Then, a transparent conductive film 20 is formed by applying a resist material and patterning it by an exposure and development process. At this time, the resist material may be either a positive type or a negative type, and an alkali development type can be easily formed. Thereafter, ITO is patterned by etching. As the etching solution at this time, a hydrobromic acid aqueous solution or the like may be selected.

  Next, for the purpose of protecting the laminated structure of the transparent conductive films 10 and 20 and the insulating film 30, the impact resistant adhesive layer 50 is formed above the transparent conductive film 20 in the figure with a transparent silicone gel. The impact-resistant adhesive layer 50 is formed by applying it to a desired region using a liquid silicone gel before curing as described later and then curing it in a curing step. The touch panel 100 of the first embodiment is formed by bonding the light-transmitting substrate 42 using the adhesive property of the impact-resistant adhesive layer 50 after curing. However, the light transmissive substrate 42 may be soda glass, alkali glass such as borosilicate glass, or non-alkali glass. It is also possible to use chemically strengthened glass. Furthermore, not only a glass substrate but also a plastic substrate such as polycarbonate, polystyrene, or acrylic may be used. The details of the bonding between the impact-resistant adhesive layer 50 and the light-transmitting substrate 42, which is a feature of the present invention, will be described in detail in Embodiment 3 to be described later.

  However, the silicone gel is an addition polymerization type silicone resin obtained by adding silicone oil to a silicone rubber monomer by the action of a platinum catalyst or the like and curing it at a crosslinking density of 1/5 to 1/10 of that of a normal silicone elastomer. Gel-like substances including silicone gels have substantially constant mechanical properties (Young's modulus: can be replaced with softness) between about -50 ° C and 200 ° C, and are used in cold regions and outdoors. The same good vibration characteristics can be maintained even in an environment or in an environment where it is exposed to direct sunlight on a hot day. Furthermore, since the gel-like substance has a small compressive residual strain, good vibration characteristics can be maintained over a long period of time. Since it has such properties, it is preferable to use a gel-like substance for fixing the light-transmitting substrate 42 to the touch panel display device, and in particular, a silicone gel that does not change the buffer effect even over a wide range of temperature changes is used. It is preferable to do.

  In the touch panel 100 according to the first embodiment, the penetration (JIS K2207) of the silicone gel forming the impact resistant adhesive layer 50 is desirably 10 to 100. This is because when the penetration is less than 10, the adhesion is insufficient, and bubbles are likely to enter during bonding. Further, when the penetration exceeds 100, the shape retention as a gel is low, and it takes time to return the minute deformation when the light-transmitting substrate 42 is pressed with a finger. This is because the deformation can be visually recognized.

  Moreover, in order to prevent the transmittance | permeability fall of the liquid crystal panel 17 which is a display part, it is preferable to form the impact-resistant adhesion layer 50 of a silicone gel by 90% or more and 100% or less in visible region (400 nm-800 nm). In consideration of impact properties, it is desirable to increase the film thickness, but in view of the transmittance in the visible light region, 3000 μm or less is appropriate. Further, in order to achieve impact resistance, a film thickness of 10 μm or more is required.

  As described above, in the touch panel display device according to the first embodiment, the TFT substrate 13 on which the TFT for driving the pixel is formed and the color filter substrate 12 on which the color filter is formed are arranged to face each other via the liquid crystal 5. The touch panel according to the first embodiment is provided on the front surface (upper side in the drawing) of the liquid crystal display device including the liquid crystal panel 17 to be formed and the backlight module 14 disposed on the back side (lower side in the drawing) of the liquid crystal panel 17. 100 is adhered by an adhesive layer 15.

  At this time, the touch panel 100 of Embodiment 1 includes a touch panel substrate 40 on which a transparent conductive film 10 that is a plurality of signal lines and a plurality of transparent conductive films 20 that intersect the transparent conductive film 10 are generated, and the touch panel. The light-transmitting substrate 42 disposed on the touch surface side of the substrate 40 is bonded so as to be opposed to each other through an impact-resistant adhesive layer 50 formed by curing a silicone gel that is a liquid adhesive composition. Since it is configured to be fixed, a highly transparent touch panel can be formed and high repairability can be realized. That is, in the touch panel display device according to the first embodiment, the impact-resistant adhesive layer 50 is made of a silicone gel containing SiO, which is the same component as glass, so that high transmittance can be realized and the light-transmitting substrate 42 is used. In addition, when a glass substrate or the like is used, it is possible to prevent the display performance from being deteriorated due to the change in the refractive index of the display light accompanying the deformation of the light transmissive substrate 42 caused by the touch operation. However, details of the repairability of the touch panel display device will be described later.

  In the touch panel display device of the first embodiment, the liquid crystal panel 17 and the touch panel 100 are bonded to each other using a normal bonding method. However, the present invention is not limited to this, and the fixing layer 15 of the liquid crystal display device is also used. Silicone gel or silicone rubber may be used.

  The touch panel display device according to the first embodiment is configured to use a liquid crystal display device for the display unit, but is not limited thereto, and can be applied to other display devices such as an organic EL display device. It is.

  Furthermore, in the first embodiment, the impact-resistant adhesive layer 50 is formed on the touch panel side. However, the present invention is not limited to this, and the impact-resistant adhesive layer 50 is formed on the light-transmitting substrate 42 side. A configuration may be employed in which the touch panel substrate 40 is bonded later.

<Embodiment 2>
<Touch panel configuration>
6 is a schematic cross-sectional view for explaining a schematic configuration of a touch panel according to a second embodiment of the present invention, and FIG. 7 is a schematic plan view for explaining a schematic configuration of the touch panel according to the second embodiment of the present invention. However, the touch panel display device of the second embodiment is different only in the configuration of the impact-resistant adhesive layer, and the other configurations are the same as those of the touch panel display device of the first embodiment. Only the layer structure will be described in detail.

  As shown in FIG. 6, the touch panel display device according to the second embodiment also has a transparent conductive film 20 for detecting a position on one surface of a light-transmitting substrate 40 and a transparent signal to which signals are supplied, as in the first embodiment. The conductive film 10 is arranged via the insulating film layer 30. As in the first embodiment, the light-transmitting substrate 40 may be soda glass, alkali glass such as borosilicate glass, or non-alkali glass. Further, not only a glass substrate but also a plastic substrate may be used. It is also possible to use chemically strengthened glass.

  Further, a silicone rubber impact-resistant adhesive layer 51 is formed above the transparent conductive film 20 in FIG. 6, and a light-transmitting substrate 42 is formed above the impact-resistant adhesive layer 51. Here, the impact-resistant adhesive layer 51 of the second embodiment is configured to cover the metal terminal portion 21 formed at the end portion of one side of the touch panel substrate 40. That is, in the touch panel of the second embodiment, the impact-resistant adhesive layer 51 is formed from the terminal portion 21 to the right end portion of the touch panel substrate 40 in the drawing. A light transmissive substrate 42 is bonded and fixed to the upper portion of the impact resistant adhesive layer 51 by the adhesiveness of the impact resistant adhesive layer 51.

  Thus, in the touch panel of Embodiment 2, since the terminal part 21 is covered with the impact-resistant adhesive layer 51, when connecting the wiring (wiring tape) to the terminal part 21, for example, at the time of crimping In this way, the wiring tape is pressed from the upper part in the figure, and the impact-resistant adhesive layer 51 formed on the upper part of the terminal part 21 can be broken, and the wiring and the terminal part 21 can be electrically connected. Details of the wiring tape will be described later.

  Further, as shown in FIG. 7, in the touch panel of the second embodiment, the entire surface of the touch panel substrate 40 is covered with the impact-resistant adhesive layer 51, so that the wiring tape is electrically connected to the terminal portion 21. Up to this point, the impact-resistant adhesive layer 51 is configured to protect the terminal portion 21.

  The configurations of the transparent conductive films 10 and 20 and the extraction electrode 22 are the same as those of the touch panel of the first embodiment. That is, both ends of the transparent conductive films 10 and 20 are connected to the extraction electrode 22 around the substrate 40, that is, in the outer peripheral region of the functional unit 24 of the touch panel, and each extraction electrode 22 is connected to the terminal portion 21. Although the extraction electrode 22 is made of metal, in the same manner as in the first embodiment, the same pattern as the transparent conductive films 10 and 20 is also applied to the extraction electrode 22 in order to clearly show which transparent conductive film is connected to the extraction electrode 22. Used to illustrate.

<Method for forming touch panel>
Hereinafter, based on FIG.6 and FIG.7, the formation procedure of the touch panel 101 of Embodiment 2 is demonstrated.

  As the transparent conductive film 10, a transparent conductive film (thickness 50 to 200 mm) made of an amorphous ITO film or IZO film is formed by sputtering so that the surface resistance is 500 to 2000Ω, A resist material is applied and patterned by exposure and development processes. At this time, the resist material may be either a positive type or a negative type, and an alkali development type can be easily formed. Thereafter, ITO is patterned by etching. As the etching solution at this time, a hydrobromic acid aqueous solution or the like may be selected.

  As the insulating film layer 30, various thicknesses can be selected in consideration of the dielectric constant of the insulating film material, but it is easy to adjust the insulating film layer with a relative dielectric constant of 3 to 4, and the film thickness is 1 to 20 μm. Can be formed. As a material for the insulating film layer, a UV (ultraviolet) curable resin material, an alkali developable negative or positive insulating film material, and a thermosetting resin material cured by heating can be used. Can be easily formed.

  Further, a transparent conductive film (thickness 50 to 200 mm) made of an amorphous ITO film or IZO film is formed on the insulating film layer 30 by a sputtering method so that the surface resistance is 500 to 2000Ω, Next, a transparent conductive film 20 is formed by applying a resist material and patterning it by exposure and development processes. At this time, the resist material may be either a positive type or a negative type, and an alkali development type can be easily formed. Thereafter, ITO is patterned by etching. As the etching solution at this time, a hydrobromic acid aqueous solution or the like may be selected.

  The visible light region (400 nm to 800 nm) transmittance of the insulating film layer 30 is preferably 90% or more so as not to lower the performance of the image display device used simultaneously with the touch panel 101.

  Here, since the insulating film layer 30 has a structure formed directly on the transparent conductive film 20 or the substrate 40, the transparent conductive film 20 and the transparent conductive film 40, and the insulating film layer 30 interposed therebetween have a display quality. In order to prevent the decrease, it is desirable to form it as thin as possible.

  In the touch panel 101 according to the second embodiment, the impact-resistant adhesive layer 51 is formed of transparent silicone rubber for the purpose of protecting the laminated structure of the transparent conductive film 20 and the insulating film 30, and light is transmitted by the adhesiveness of the impact-resistant adhesive layer 51. It is the structure which bonds the property board | substrate 42 together. The light-transmitting substrate 42 may be soda glass, alkali glass such as borosilicate glass, or non-alkali glass. It is also possible to use chemically strengthened glass. Further, not only a glass substrate but also a plastic substrate such as polycarbonate, polystyrene, or acrylic may be used.

  In particular, in the touch panel display device of the second embodiment, the hardness (Shore A) of the silicone rubber forming the impact-resistant adhesive layer 51 is desirably 10 to 100, and if it exceeds 100, the adhesion becomes low and the light transmitting property is reduced. This is not preferable because the substrate 42 is easily peeled off. In order to prevent a decrease in the transmittance of the display portion, the silicone rubber is preferably formed in the visible light region (400 nm to 800 nm) at 90% or more and 100% or less, and it is desirable to increase the thickness in consideration of impact resistance. However, 3000 μm or less is appropriate in view of the transmittance in the visible light region. Further, in order to achieve impact resistance, a film thickness of 10 μm or more is required. Silicone rubber can also be used for the adhesive layer 15 of the touch panel display device and the liquid crystal display device.

  As described above, in the touch panel display device according to the second embodiment, the TFT substrate on which the TFT for driving the pixel is formed and the color filter substrate on which the color filter is formed are formed so as to face each other through the liquid crystal. The touch panel 101 according to the second embodiment is adhered to the front surface of a liquid crystal display device including a liquid crystal panel and a backlight module disposed on the back side of the liquid crystal panel.

  At this time, the touch panel 101 of the second embodiment includes a touch panel substrate 40 on which a transparent conductive film 10 that is a plurality of signal lines and a plurality of transparent conductive films 20 that intersect the transparent conductive film 10 are generated, and the touch panel. Adhering so that the light-transmitting substrate 42 disposed on the touch surface side of the working substrate 40 is disposed opposite to the impact-resistant adhesive layer 51 formed by curing silicone rubber that is a liquid adhesive composition. Since it is configured to be fixed, a highly transparent touch panel can be formed and high repairability can be realized. That is, in the touch panel display device according to the second embodiment, the impact-resistant adhesive layer 51 uses a silicone rubber containing SiO, which is the same component as glass, so that high transmittance can be realized and a light-transmitting substrate is used. When a glass substrate is also used for 42, it is possible to prevent display performance from being deteriorated due to a change in the refractive index of display light accompanying deformation of the light-transmitting substrate 42 caused by touch operation. The details of the repairability of the touch panel display device will be described later.

<Embodiment 3>
In Embodiment 3, a method for manufacturing a touch panel display device according to Embodiment 1 of the present invention will be described. FIG. 8 is a schematic plan view for explaining a method for manufacturing a touch panel in the touch panel display device according to Embodiment 1. FIG. 3 is a side view for explaining a method of attaching a light-transmitting substrate to the touch panel in the touch panel display device of Embodiment 1. However, the present embodiment relates to a manufacturing method for forming the impact-resistant adhesive layer 50 with silicone gel using screen printing.

  As described above, the touch panel display device 100 according to the first embodiment forms the impact-resistant adhesive layer 50 with a transparent silicone gel for the purpose of protecting the laminated structure of the transparent conductive films 10 and 20 and the insulating film 30, and transmits light. The substrate 42 is attached. The impact-resistant adhesive layer 50 does not impair the transmittance in the visible light region and also has impact resistance. Therefore, the impact-resistant adhesive layer 50 needs to be formed with a thickness of 10 μm or more and 3000 μm or less, and a silicone gel is formed by screen printing before crosslinking. In the manufacturing method according to the third embodiment, the screen plate is made of stainless mesh having a mesh diameter of 500 μm, and the driver connecting portion is within the region of the impact-resistant adhesive layer 50 shown in FIG. An area excluding 23 is set as a print area. The application of the silicone gel is not limited to the screen printing method, but other methods such as a blade coater method, a micro gravure coating method, a bar coating method, a spray coating method, a comma coating method, a die coating method, and a spin coating method. A coating method may be used.

  First, a method for forming the impact-resistant adhesive layer 50 by screen printing will be described with reference to FIG. In addition, since the hardening of a silicone gel is common by the heating, also in the following description, the case where the liquid silicone gel before hardening is apply | coated by the screen printing method is demonstrated.

  First, a liquid silicone gel (silicone gel before cross-linking) is formed by a screen printing method in an area to be the impact-resistant adhesive layer 50, that is, an area excluding the driver connection portion 23 in the surface area of the touch panel substrate 40. Thereafter, the silicone gel is cured (curing treatment) by heating with a known hot plate or the like to form the impact-resistant adhesive layer 50 having predetermined adhesion performance and elasticity. As the heating temperature at this time, a temperature suitable for the silicone gel to be used is selected. For example, potting elastomer SilGel 612 manufactured by Asahi Kasei Wacker is suitable as the impact-resistant adhesive layer 50. When this potting elastomer SilGel 612 is used, it is heated at 70 ° C. for 30 minutes using a hot plate after screen printing. Thus, the impact-resistant adhesive layer 50 is formed. In addition, since the silicone gel of this Embodiment 3 used the type hardened | cured with a heat | fever, it was set as the structure which heat-processes for hardening, but when using the type of silicone gel hardened | cured with a radiation etc., it is mentioned above Irradiation treatment such as radiation is required instead of the heat treatment.

  The transmittance of the impact-resistant adhesive layer 50 in the visible light region (400 nm to 800 nm) is preferably 90% or more and 100% or less so as not to lower the performance of the image display device used simultaneously with the touch panel display device 100. .

  By the above procedure, the touch panel display device provided with the impact-resistant adhesive layer 50 can be formed by screen printing.

  After the formation of the impact-resistant adhesive layer 50, a film-like wiring tape 55 having a plurality of wirings for electrically connecting a driver IC (not shown) and the transparent conductive films 10 and 20 as shown in FIG. Connect to terminal portion 21. With the connection of the wiring tape 55, the wiring is connected from each terminal to the driver IC. The connection of the wiring tape 55 is preferably after the impact resistant adhesive layer 50 is formed, but may be before the impact resistant adhesive layer 50 is printed from the viewpoint of workability. Further, in the third embodiment, the impact-resistant adhesive layer 50 is printed on the touch panel side, but it may be configured to print directly on the light-transmitting substrate 42.

  Next, a process of bonding the light transmissive substrate 42 to the touch panel 100 including the impact-resistant adhesive layer 50 of the third embodiment will be described. The light-transmissive substrate 42 may be bonded by either the touch panel substrate 40 provided with the impact-resistant adhesive layer 50 or the touch panel substrate 40 provided with the impact-resistant adhesive layer 50 after the liquid crystal panel is bonded. . Accordingly, in the following description, the touch panel substrate 40 including the single touch panel substrate 40 or the impact-resistant adhesive layer 50 after the liquid crystal panel is bonded is referred to as a transparent substrate side panel 60.

  As shown in FIG. 9, after a transparent substrate 42 is superimposed on a transparent substrate side panel 60 having an impact-resistant adhesive layer 50, the upper portion in the drawing, that is, from the touch surface side of the transparent substrate 42 is shown. The roller 70 is fixed by rotating it while applying a constant load (predetermined load). The roller 70 is preferably configured to include a rubber cushion layer 72 on a metal roller shaft 71, and a touch panel or a touch panel display device provided with an impact-resistant adhesive layer 50 by rotating along the end face of the light-transmitting substrate 42. Can be formed.

  As described above, according to the manufacturing method of the third embodiment, the liquid silicone gel that is the liquid adhesive composition is applied to the touch surface side of the transparent substrate side panel (first substrate) 60 or the light transmissive substrate (first substrate). 2 substrate) 42 is applied (coated) to the opposite surface side, a heat treatment is performed to cure the applied silicone gel to form the impact-resistant adhesive layer 50, and the anti-resistance formed in the curing step. The impact adhesive layer 50 includes a step of bonding the touch surface side of the transparent substrate side panel 60 and the opposite surface side of the light transmissive substrate 42 together.

<Embodiment 4>
In Embodiment 4, a method for manufacturing a touch panel display device according to Embodiment 2 of the present invention will be described. FIG. 10 is a schematic plan view for explaining a method for manufacturing a touch panel in the touch panel display device according to Embodiment 2. However, the fourth embodiment relates to a manufacturing method for forming the impact-resistant adhesive layer 51 with silicone rubber using screen printing, and other than the method for connecting the region where the impact-resistant adhesive layer 51 is formed and the wiring tape 55 are connected. The manufacturing method is the same as that of the fourth embodiment. Therefore, in the following description, a method for connecting the formation region of the impact-resistant adhesive layer 51 and the wiring tape 55 will be described in detail.

  First, liquid silicone rubber is formed by screen printing on the entire surface of the touch panel substrate 40, which is a region where the impact-resistant adhesive layer 51 is formed. Thereafter, the silicone rubber is cured by heating with a known hot plate or the like, thereby forming an impact-resistant adhesive layer 51 having predetermined adhesion performance and elasticity. As the heating temperature at this time, a temperature suitable for the silicone rubber to be used is appropriately selected. In addition, since the silicone rubber of the fourth embodiment is of a type that is cured by heat, the heat treatment is performed for curing. However, when a silicone gel that is cured by radiation or the like is used, heating is performed. Irradiation processing such as radiation is required instead of processing.

  By the above procedure, the touch panel display device provided with the impact-resistant adhesive layer 51 can be formed by screen printing.

  After the formation of the impact-resistant adhesive layer 51, a film-like wiring tape 55 having a plurality of wirings for electrically connecting a driver IC (not shown) and the transparent conductive films 10 and 20 as shown in FIG. Connect to terminal portion 21. At this time, since the terminal portion 21 is covered with the impact-resistant adhesive layer 51, when connecting the wiring tape 55 of the fourth embodiment, the wiring tape 55 is pressed from the touch surface side, for example, at the time of crimping. Thus, the impact-resistant adhesive layer 51 formed on the upper portion of the terminal portion 21 is broken, and the wiring tape 55 and the terminal portion 21 are electrically connected. With the connection of the wiring tape 55, the wiring is connected from each terminal to the driver IC. The connection of the wiring tape 55 is preferably after the impact resistant adhesive layer 50 is formed, but may be before the impact resistant adhesive layer 50 is printed from the viewpoint of workability. Further, in the fourth embodiment, the impact-resistant adhesive layer 50 is printed on the touch panel side, but it may be configured to print directly on the light-transmitting substrate 42.

  Thereafter, the touch panel 101 in which the light-transmissive substrate 42 is bonded to the touch panel 101 including the impact-resistant adhesive layer 51 of the fourth embodiment is formed by the same procedure as that of the third embodiment.

  As described above, according to the manufacturing method of Embodiment 4, a liquid silicone rubber, which is a liquid adhesive composition, is formed on a touch panel substrate (transparent substrate side panel, Applying (coating) to the touch surface side of the first substrate 40 or the opposite surface side of the light-transmitting substrate (second substrate) 42, and heat treatment, the applied silicone rubber is cured and shock resistant. A curing step for forming the adhesive layer 51, and a step of bonding the touch surface side of the transparent substrate side panel and the opposite surface side of the light-transmitting substrate 42 by the impact resistant adhesive layer 51 formed in the curing step. It is what you have.

<Embodiment 5>
In the fifth embodiment, a repair method of the touch panel display device according to the first embodiment of the present invention will be described. FIG. 11 is a side view for explaining a touch panel repair procedure in the touch panel display device according to the first embodiment. However, in the following description, the repair method in the configuration of only the touch panel will be described, but the repair method in the touch panel display device after the touch panel and the liquid crystal panel 17 are bonded with the adhesive layer 15 is the same procedure.

  A repair method in the case where a silicone gel is used as the impact-resistant adhesive layer 50 in the touch panel display device including the light-transmitting substrate 42 obtained by the manufacturing method described in the third embodiment will be described in the following order.

  As shown in FIG. 11A, first, a blade 80 thinner than the gap is inserted into the gap between the light transmissive substrate 42 and the transparent substrate side panel 60. The blade can be made of any suitable material such as metal or resin, but is preferably made of a material having adhesion to the silicone gel used as the impact resistant adhesive layer 50. After inserting the blade 80 to such an extent that the light-transmitting substrate 42 and the transparent substrate side panel 60 are not damaged, the blade 80 can be pulled out with the silicone gel forming the impact resistant adhesive layer 50 attached to the end surface of the blade 80. I can do it. In this case, the impact-resistant adhesive layer 50 is pulled out from silicone such that the adhesiveness (surface adhesive strength) is weakly adhesive, soft even after curing, and the tensile strength is greater than the adhesive strength. This is made possible by the properties of the gel.

  Next, as shown in FIG. 11 (b), the pulled silicone gel is wound around a rotatable rod 82. The rod 82 can be selected from metal and resin as appropriate. However, a wire with a fine groove is preferable in order to efficiently wind the silicone gel.

  As shown in FIG. 11C, while the rod 82 is rotated, a force 81 that peels the light-transmitting substrate 42 and the transparent substrate side panel 60 in the opposite directions is continuously applied. By winding up the silicone gel forming the impact-resistant adhesive layer 50 to the end, the silicone gel can be removed from the interface between the light-transmitting substrate 42 and the transparent substrate side panel 60, and the light-transmitting substrate 42 and the transparent substrate 42 are transparent. Repair can be performed without damaging the substrate-side panel 60. At this time, silicone gel tends to remain at the starting point of peeling and the outer peripheral frame portion of the transparent substrate side panel 60, but can be easily removed with a cotton swab after peeling.

  As described above, in peeling off the transparent substrate side panel 60 and the light transmissive substrate 42 in the touch panel of the first embodiment using the silicone gel as the impact resistant adhesive layer 50, the transparent substrate side panel 60 and the light transmissive substrate 42 are separated. Since the impact-resistant adhesive layer 50 can be removed by pulling out the silicone gel from the gap when the substrate 42 is bonded together, the amount of work can be greatly reduced and high repairability is achieved. can do.

  In the repair method described above, the touch-resistant substrate 40 (considering the case where the display panel 17 is included as the transparent substrate side panel 60 in FIG. 11) and the light-resistant substrate 42 are more resistant to impact than the adhesive layer. This is a repair method in which 50 is formed on the inner side. However, as shown in FIG. 13, by forming the protruding portion 52 in the impact-resistant adhesive layer 50, the repair can be performed more efficiently.

  That is, as shown in FIG. 13, at least one portion 52 of the impact-resistant adhesive layer 50 is located on the outer side of the end portion of at least one of the touch panel substrate 40 and the light transmissive substrate 42. It is formed in the part. By adopting such a configuration, at the time of repair, the protruding portion 52 can be replaced with the above-described pulling-out portion, so that the repair from the procedure of FIG. The amount of work required to peel off the transparent substrate side panel 60 can be further reduced.

<Embodiment 6>
In the sixth embodiment, a repair method of the touch panel display device according to the second embodiment of the present invention will be described. FIG. 12 is a side view for explaining a touch panel repair procedure in the touch panel display device according to the second embodiment. However, in the following description, the repair method in the configuration of only the touch panel will be described, but the repair method in the touch panel display device after the touch panel and the liquid crystal panel 17 are bonded with the adhesive layer 15 is the same procedure.

  A repair method in the case where silicone rubber is used as the impact-resistant adhesive layer 51 in the touch panel display device provided with the light-transmitting substrate 42 obtained by the manufacturing method described in the fourth embodiment will be described in the following order.

  As shown in FIG. 12, first, two thin blades 85 are inserted into the gap between the light-transmitting substrate 42 and the transparent substrate side panel 60 through the gap. Here, the insertion amount of the blade 85 does not need to touch the silicone rubber used as the impact-resistant adhesive layer 51, and only supports the light-transmitting substrate 42 and the transparent substrate side panel 60 with the respective blades 85. It's okay. For this reason, the blade 85 is preferably made of a material such as resin rather than metal, and needs to be strong enough to continue to apply a weak load in the direction 81 in which the light-transmitting substrate 42 and the transparent substrate side panel 60 are peeled off. The load applied to the peeling is preferably about 100 g, and can be completely peeled by leaving it for several minutes. The load and time depend on the deformation resistance of the light transmissive substrate 42 and the transparent substrate side panel 60 to be used, and may be appropriately selected.

  At this time, the light-transmitting substrate 42 and the transparent substrate-side panel 60 are peeled off from each other by the characteristics of the silicone rubber such that the adhesiveness (surface adhesive force) is weakly adhesive and is soft even after curing. Is possible.

  As described above, in peeling off the transparent substrate side panel 60 and the light transmissive substrate 42 in the touch panel of the second embodiment using silicone rubber for the impact resistant adhesive layer 50, the transparent substrate side panel 60 and the light transmissive substrate 42 are separated. The transparent substrate-side panel 60 and the light-transmitting substrate 42 that are bonded by the impact-resistant adhesive layer 50 can be peeled off only by applying a force that widens the gap when the substrate 42 is bonded. Therefore, the amount of work can be greatly reduced, and high repairability can be realized.

It is a cross-sectional schematic diagram of a touch panel display device having a general capacitive coupling type touch panel. It is a perspective view of a touch panel display device having a general capacitive coupling type touch panel. It is a cross-sectional schematic diagram for demonstrating schematic structure of the touchscreen display apparatus of Embodiment 1 of this invention. It is a cross-sectional schematic diagram for demonstrating schematic structure of the touchscreen of Embodiment 1 of this invention. It is a plane schematic diagram for demonstrating schematic structure of the touchscreen of Embodiment 1 of this invention. It is a cross-sectional schematic diagram for demonstrating schematic structure of the touchscreen of Embodiment 2 of this invention. It is a plane schematic diagram for demonstrating schematic structure of the touchscreen of Embodiment 2 of this invention. It is a plane schematic diagram for demonstrating the manufacturing method of the touchscreen in the touchscreen display apparatus of Embodiment 1 of this invention. It is a side view for demonstrating the sticking method of a light-transmitting board | substrate to the touchscreen in the touchscreen display apparatus of Embodiment 1 of this invention. It is a plane schematic diagram for demonstrating the manufacturing method of the touchscreen in the touchscreen display apparatus of Embodiment 2 of this invention. It is a side view for demonstrating the repair procedure of the touchscreen in the touchscreen display apparatus of Embodiment 1 of this invention. It is a side view for demonstrating the repair procedure of the touchscreen in the touchscreen display apparatus of Embodiment 2 of this invention. It is a plane schematic diagram for demonstrating schematic structure of the other touch panel which improved the repairability of the touch panel of Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Conventional touch panel display device, 2 ... Polarizing plate 3 ... Glass for color filter substrates, 4 ... Color filter (RGB) layer 5 ... Liquid crystal, 6 ... TFT element layer, DESCRIPTION OF SYMBOLS 7 ... Glass for TFT substrates, 8 ... Polarizing plate 9 ... Diffusion sheet, 10 ... 1st transparent conductive film, 12 ... Color filter substrate 13 ... TFT substrate, 14 ... -Backlight module, 15 ... Adhesive layer 16 ... Air layer, 17 ... Liquid crystal panel 18 ... Touch panel of touch panel display device, 20 ... Second transparent electrode film 21 ... Terminal part 22 ... extraction electrode, 23 ... driver connection part 30 ... insulating film layer, 40 ... substrate for touch panel, 41 ... transparent electrode for position detection 42 ... light transmissive substrate, 43 ... Finger to touch, 50, 51 ... Impact resistant adhesive layer 52... Protruding portion, 55... Wiring film 60 connecting the terminal part and driver... Touch panel display device 70 fixed to liquid crystal display device 70... Roller 71. 72 ... Cushion layer 80 ... Blade, 81 ... Stripping direction, 82 ... Bar 83 ... Direction of rotation of the rod, 85 ... To blade, 100, 101 ... Touch panel

Claims (11)

A first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting the first signal lines are formed;
A touch panel comprising: a second substrate disposed on a touch surface side of the first substrate;
An impact-resistant adhesive layer formed by curing the liquid adhesive composition,
The first substrate and the second substrate are arranged to face each other with the impact-resistant adhesive layer interposed therebetween,
The touch panel, wherein the impact-resistant adhesive layer is formed of silicone gel. The touch panel according to claim 1,
The penetration resistance (JIS K2207) of the impact-resistant adhesive layer formed of the silicone gel is 10-100. A first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting the first signal lines are formed;
A touch panel comprising: a second substrate disposed on a touch surface side of the first substrate;
An impact-resistant adhesive layer formed by curing the liquid adhesive composition,
The first substrate and the second substrate are arranged to face each other with the impact-resistant adhesive layer interposed therebetween,
The touch panel, wherein the impact-resistant adhesive layer is formed of silicone rubber. The touch panel according to claim 3,
The rubber hardness (Shore A) of the impact-resistant adhesive layer formed of the silicone rubber is 10 to 100. The touch panel according to any one of claims 1 to 4,
The thickness of the said impact-resistant adhesion layer is 10-3000 micrometers. The touchscreen characterized by the above-mentioned. The touch panel according to any one of claims 1 to 5,
The transmittance of the impact-resistant adhesive layer is 90% or more and 100% or less in the visible light region (400 nm to 800 nm). The touch panel according to any one of claims 1 to 6,
A touch panel that detects a touch position by a capacitive coupling method. A display panel having a plurality of drain lines and a plurality of gate lines intersecting the drain lines, wherein a region surrounded by the drain lines and the gate lines is a pixel region;
A touch panel display device comprising: the touch panel according to claim 1 disposed on a display surface side of the display panel. A first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting with the first signal lines are formed, and a first substrate disposed on the touch surface side of the first substrate. A method for manufacturing a touch panel comprising two substrates and an impact-resistant adhesive layer formed by curing a liquid adhesive composition,
Applying the liquid adhesive composition to the touch surface side of the first substrate or the opposing surface side of the second substrate;
A curing step of curing the applied liquid adhesive composition by irradiation or heating to form an impact-resistant adhesive layer;
Bonding the touch surface side of the first substrate and the opposite surface side of the second substrate by the impact-resistant adhesive layer formed in the curing step;
The method for manufacturing a touch panel, wherein the impact-resistant adhesive layer is made of silicone gel. A first substrate on which a plurality of first signal lines and a plurality of second signal lines intersecting with the first signal lines are formed, and a first substrate disposed on the touch surface side of the first substrate. A method for manufacturing a touch panel comprising two substrates and an impact-resistant adhesive layer formed by curing a liquid adhesive composition,
Applying the liquid adhesive composition to the touch surface side of the first substrate or the opposing surface side of the second substrate;
A curing step of curing the applied liquid adhesive composition by irradiation or heating to form an impact-resistant adhesive layer;
Bonding the touch surface side of the first substrate and the opposite surface side of the second substrate by the impact-resistant adhesive layer formed in the curing step;
The method for manufacturing a touch panel, wherein the impact-resistant adhesive layer is made of silicone rubber. In the manufacturing method of the touch panel according to claim 9 or 10,
The method of manufacturing a touch panel, wherein the step of applying the liquid adhesive composition to the touch surface side of the first substrate or the opposite surface side of the second substrate is screen printing.

Images