JP2012098785A - Input device manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an input device manufacturing method capable of reducing occurrence of bubbles in a translucent area outer edge portion and occurrence of level difference at a translucent area outer edge portion of an input device surface.SOLUTION: An input device manufacturing method includes: (a) a step of setting, on one surface of a film type first transparent base material 10, a window-like translucent area 11 that transmits visible light, and forming a first decoration layer 21 composed of plural first decoration portions 21a outward from the translucent area 11 at a predetermined interval s; (b) a step of superimposing a second decoration layer 22 outward from the translucent area 11 by covering the first decoration layer 21 and an exposed portion where the first decoration portions 21a are not formed on the one surface of the first transparent base material 10; and (c) a step of adhering one surface of a film type second transparent base material 30 whose other surface has a transparent electrode layer 32 for detecting input position information formed thereon and the one surface of the first transparent base material 10 via a light-transmissive adhesive layer 41.

Description

  The present invention relates to a method for manufacturing an input device, and more particularly to a method for manufacturing an input device having a decorative layer.

  Currently, as a display unit of a portable electronic device or the like, a translucent input device for inputting coordinates by directly operating a menu item or object of a display image with a finger or the like is used. Such an input device is arranged so as to overlap with a display device, is incorporated in an electronic device, and is directly recognized by an operator, and thus is required to have a good appearance.

  Various types of operation methods have been developed as such an input device. For example, Patent Document 1 describes a resistive touch panel. FIG. 13 shows an input device 101 of a conventional example of Patent Document 1. In the input device 101, an upper light-transmitting substrate 130 and a lower light-transmitting substrate 131 are disposed to face each other with a space portion therebetween via a second adhesive layer 142. Further, an upper transparent conductive film 132 and a lower transparent conductive film 133 are formed on the opposing surfaces of the upper light transmitting substrate 130 and the lower light transmitting substrate 131, respectively. The upper light-transmitting substrate 130 is made of a flexible film-like material, and the upper transparent conductive film 132 and the lower transparent conductive film 133 come into contact with each other by pressing any part of the input surface. . The input device 101 of the conventional example can read the change of the resistance value at this time and detect the input position coordinates.

  Further, an upper printed circuit 134 that connects the upper transparent conductive film 132 and an external circuit such as a flexible substrate is provided at the periphery of the upper transparent conductive film 132, and a lower printed circuit 135 is provided at the periphery of the lower transparent conductive film 133. Is formed. The upper printed circuit 134 and the lower printed circuit 135 are formed of a conductive paste that includes a conductive metal filler such as silver or copper. Since the input device 101 uses a light-transmitting substrate, the upper printed circuit 135 and the lower printed circuit 136 are seen through the outside.

  In the input device 101 of the conventional example shown in FIG. 13, the decorative print sheet 110 is bonded to the input surface side of the upper light transmitting substrate 130 by the first adhesive layer 141, and the outer peripheral portion of the decorative print sheet 110. The decorative printing layer 122 formed on the upper side prevents the upper printed circuit 134 and the lower printed circuit 135 from being visually recognized from the outside. In addition, the input device 101 is used in an overlapping manner with an external display device such as a liquid crystal display, for example, but the decorative print layer 122 can also shield light from the display screen of the external display device.

  Further, a step between the decorative printing layer 122 and the decorative printing sheet 110 is formed on the surface of the decorative printing sheet 110 that faces the upper translucent substrate 130, but the viscoelasticity of the first adhesive layer 141. It is possible to absorb this decorative step. As a result, even when the decorative printing sheet 110 and the upper translucent substrate 130 are bonded together, it is possible to prevent the generation of bubbles in the decorative step portion and to maintain the flatness of the input device surface. It was.

JP 2005-173970 A

  In the conventional input device 101, the decorative print layer 122 is generally provided as a single layer using a dark color such as black in order to enhance the shielding effect. However, with the diversification of electronic devices such as mobile phones, electronic devices with unique and innovative designs have been demanded, and there has been a need for devices with improved design that match the surroundings of the display screen to the housing of the electronic device. Yes. Therefore, in an input device mounted on an electronic device, it is desired to display various patterns, designs, marks, characters, and the like with a decorative layer in order to improve design around the display unit. In this case, at least two layers of a pattern decoration layer for displaying characters, patterns and the like and a background decoration layer as a background color are laminated.

  Further, the background color may be formed with a low shade effect such as white. In this case, since a shielding effect cannot be sufficiently obtained with a single decorative layer, it is necessary to increase the number of layers to two or more layers to enhance the shielding effect.

  However, when the decorative layer is made multilayer, the decorative step at the boundary between the translucent region and the surrounding decorative region becomes large, and it is difficult to absorb the decorative step only with the viscoelasticity of the adhesive layer. It becomes. For this reason, when the decorative print sheet and the upper light-transmitting substrate are bonded to each other through the adhesive layer, there is a problem that bubbles are generated in the step portion between the decorative print sheet and the decorative layer at the outer edge of the light-transmitting region. occured. Since the bubbles are directly recognized by the operator, they are defective in appearance, and the reliability in high temperature and high humidity conditions may be reduced. In addition, since the decorative printing sheet uses a flexible film-like material, a step may be raised at the outer edge of the translucent region on the surface of the decorative printing sheet. Since the surface of the decorative printing sheet constitutes the input surface of the input device and is directly recognized by the operator, the step at the outer edge of the translucent area is not preferable in appearance.

  The present invention relates to a method for manufacturing an input device having a multi-layered decorative layer, solves the above problems, suppresses the generation of bubbles at the outer edge of the light-transmitting region, and generates a step at the outer edge of the light-transmitting region on the surface of the input device. An object of the present invention is to provide a method of manufacturing an input device that can be suppressed.

  In the manufacturing method of the input device of the present invention, (a) a window-like light-transmitting region that transmits visible light is set on one surface of the film-like first transparent base material, and a predetermined distance from the light-transmitting region is set. A step of forming a first decorative layer composed of a plurality of first decorative portions on the outer side provided, and (b) on the outer side of the light-transmitting region, on one surface of the first transparent substrate. A step of laminating a second decorative layer so as to cover the exposed portion where the first decorative portion is not formed and the first decorative layer; and (c) a transparent electrode for detecting input position information on one surface thereof. A step of laminating the other surface of the film-like second transparent substrate on which the layer is formed and the one surface of the first transparent substrate via a translucent adhesive layer. To

  In this invention, the 1st decorating layer comprised from a some 1st decorating part is formed in the outward which provided the translucent area | region and predetermined spacing in the process of (a), Then, the process of (b) The second decorative layer is laminated outside the translucent region. Thereby, even if it is a case where a decoration layer is laminated | stacked in multiple layers, the level | step difference of the 1st transparent base material and decoration layer in the outer edge of a translucent area | region becomes only the level | step difference by a 2nd decoration layer.

  By reducing the level difference of the decorative layer at the outer edge of the translucent region, the translucent light is transmitted when the film-like first transparent base material and the second transparent base material are bonded via the adhesive layer in the step (c). It is possible to suppress the generation of bubbles in the stepped portion between the first transparent base material and the second decorative layer at the outer edge of the region. Moreover, it can suppress that a level | step difference generate | occur | produces on the surface of a film-form 1st transparent base material in a translucent area | region outer edge.

  In addition, in the manufacturing method of the input device according to the present invention, after the step (b), the unevenness formed on the surface of the second decorative layer outside the light-transmitting region at a predetermined interval is provided. It includes a step of laminating a third decorative layer in the recess.

  According to this, the unevenness | corrugation formed in the surface of the 2nd decorating layer by the influence of the unevenness | corrugation of a 1st transparent base material and a 1st decorating layer is planarized by laminating | stacking a 3rd decorating layer. . Therefore, in the step (c), when one surface of the first transparent substrate and the other surface of the second transparent substrate are bonded to each other through the light-transmitting adhesive layer, the outer side of the light-transmitting region It becomes possible to form the surface of the 1st transparent base material in flat. Thereby, it is possible to provide an input device with a good appearance having a flat display portion.

  Further, in the manufacturing method of the input device according to the present invention, after the step (a), the first of the one surface of the first transparent base material is provided outside at a predetermined distance from the light transmitting region. Including a step of forming a third decorative layer in a concave-convex recess composed of an exposed portion where the decorative portion is not formed and the first decorative layer, and the second decorative in the step (b) It is preferable that the first decorative layer and the third decorative layer are covered with a layer and laminated outside the light-transmitting region.

  According to this, since the unevenness | corrugation comprised with a 1st transparent base material and a 1st decorating layer is planarized by the 3rd decorating layer, it covers the 1st decorating layer and the 3rd decorating layer. Thus, the second decorative layer can be laminated flat. Therefore, in the step (c), when one surface of the first transparent substrate and the other surface of the second transparent substrate are bonded to each other through the light-transmitting adhesive layer, the outer side of the light-transmitting region It is possible to form the surface of the first transparent base material in a flat manner and to provide an input device having a good appearance.

  In the method for manufacturing an input device of the present invention, (a) a window-like light-transmitting region that transmits visible light is set on one surface of a film-like first transparent base material, and a border is formed so as to surround the light-transmitting region. A step of forming a layer; and (b) a first decoration constituted of a plurality of first decoration portions on one surface of the first transparent base material and provided with a predetermined interval on the outer surface. A step of forming a layer; and (c) an exposed portion where the first decorative portion on one surface of the first transparent substrate is not formed and the first decorative layer outside the translucent region. And (d) a film-like second transparent substrate in which a transparent electrode layer for detecting input position information is formed on one surface of the second decorative layer. Bonding the other surface of the material and the one surface of the first transparent base material through a translucent adhesive layer. It is characterized in.

  According to this, even when the border layer surrounding the translucent region is formed, the step at the outer edge of the translucent region is only the step of the border layer, so that the step at the outer edge of the translucent region can be reduced. It has become possible.

  By reducing the step at the outer edge of the light-transmitting region, when the film-like first transparent substrate and the second transparent substrate are bonded together via the adhesive layer in the step (d), Generation of bubbles can be suppressed. Moreover, it can suppress that a level | step difference generate | occur | produces in the film-like 1st transparent base material surface in a translucent area | region outer edge part.

  In the manufacturing method of the input device of the present invention, after the step (c), the third decorative layer is formed in the concave and convex recesses formed on the surface of the second decorative layer outside the border layer. It includes a step of laminating.

  According to this, the unevenness | corrugation formed in the surface of the 2nd decorating layer by the influence of the unevenness | corrugation of a 1st transparent base material, a 1st decorating layer, and a border layer is flat by laminating | stacking a 3rd decorating layer. It becomes. Therefore, in the step (d), when the one surface of the first transparent substrate and the other surface of the second transparent substrate are bonded together via the translucent adhesive layer, the first transparent substrate It is possible to form a flat surface. Thereby, it is possible to provide an input device with a good appearance having a flat display portion.

  In the manufacturing method of the input device according to the present invention, after the step (b), the first decorative portion on the one surface of the first transparent base material is not formed outside the border layer. Including a step of forming a third decorative layer in a concave-convex concave portion constituted by a portion and the first decorative layer, wherein the first decorative layer is formed by the second decorative layer in the step (c). And the third decorative layer, and are laminated outside the light-transmitting region across the border layer.

  According to this, since the unevenness | corrugation comprised with a 1st transparent base material, a 1st decorating layer, and a border layer is planarized by the 3rd decorating layer, the 1st decorating layer and the 3rd decorating layer It becomes possible to laminate | stack a 2nd decoration layer flatly. Therefore, in the step (c), when the one surface of the first transparent substrate and the other surface of the second transparent substrate are bonded to each other via the translucent adhesive layer, the first transparent substrate Therefore, it is possible to provide an input device having a good appearance.

  Furthermore, according to the manufacturing method of the input device of the present invention, it is preferable that the third decorative layer is formed by a printing method. According to this, it becomes possible to laminate | stack a 3rd decoration layer easily and can aim at reduction of manufacturing cost.

  According to the method for manufacturing an input device of the present invention, it is preferable that the first decorative layer and the second decorative layer are formed by a printing method. According to this, it is possible to easily form a multi-layered decorative layer, and the manufacturing cost can be reduced.

  Moreover, according to this invention, it is suitable to form the pattern decoration layer which displays a pattern, a pattern, a character, a mark, etc. with the said 1st decoration layer.

  ADVANTAGE OF THE INVENTION According to this invention, regarding the manufacturing method of the input device which has a multilayer decoration layer, generation | occurrence | production of the bubble in the level | step-difference part of the outer edge of a translucent area | region can be suppressed. Moreover, it can suppress that a level | step difference generate | occur | produces on the surface of a film-form 1st transparent base material in a translucent area | region outer edge.

It is sectional drawing of the input device of 1st Embodiment. It is process drawing which shows the manufacturing method of the input device in 1st Embodiment. It is process drawing which shows the manufacturing method of the input device in 1st Embodiment. It is process drawing which shows the manufacturing method of the input device in 1st Embodiment. It is process drawing which shows the modification of the manufacturing method of the input device in 1st Embodiment. It is process drawing which shows another modification of the manufacturing method of the input device in 1st Embodiment. It is process drawing which shows the manufacturing method of the input device in 2nd Embodiment. It is process drawing which shows the manufacturing method of the input device in 2nd Embodiment. It is process drawing which shows the manufacturing method of the input device in 2nd Embodiment. It is process drawing which shows the manufacturing method of the input device in 2nd Embodiment. It is process drawing which shows the modification of the manufacturing method of the input device in 2nd Embodiment. It is process drawing which shows another modification of the manufacturing method of the input device in 2nd Embodiment. It is sectional drawing which shows the input device of a prior art example.

<First Embodiment>
FIG. 1 is a cross-sectional view of the input device 1 according to the first embodiment. As shown in FIG. 1, in the input device 1 of the present embodiment, the second transparent base material 30 and the third transparent base material 31 have a space and are opposed to each other, and the upper surface side of the second transparent base material 30. The first transparent base material 10 is bonded to and configured through the first adhesive material 41. An upper transparent electrode layer 32 and a lower transparent electrode layer 33 are formed on the opposing surfaces of the second transparent substrate 30 and the third transparent substrate 31, respectively. Moreover, the upper wiring pattern 34 and the lower wiring pattern 35 are formed in the outer periphery of a transparent electrode layer in the surface which the 2nd transparent base material 30 and the 3rd transparent base material 31 oppose, respectively.

  The first transparent base material 10 and the second transparent base material 30 are flexible film-like materials, and are materials that can be deformed by a pressing operation. When the input surface is pressed by a finger or a pen-shaped input device during the input operation of the input device 1, the upper transparent electrode layer 32 and the lower transparent electrode layer 33 are in contact with each other. A voltage is applied to each of the upper transparent electrode layer 32 and the lower transparent electrode layer 33, and the voltage value changes when the electrode layers come into contact with each other at the place where the input operation is performed. The input device 1 according to the present invention is a resistive touch panel that can read input position information based on the change in the voltage value.

  Further, the first decorative layer 21 and the second decorative layer are arranged on the surface of the first transparent base material 10 facing the second transparent base material 30 so as to overlap the upper wiring pattern 34 and the lower wiring pattern 35 in a plane. Layer 22 is laminated.

  Thereby, the upper wiring pattern 34 and the lower wiring pattern 35 are shielded by the first decorative layer 21 and the second decorative layer 22 and are not visually recognized when viewed from the outside. In addition, the first decorative layer 21 and the second decorative layer 22 can prevent light from a display device such as a liquid crystal display laminated with the input device 1 from passing through other than the translucent region 11.

  2 to 6 are process diagrams in the method for manufacturing the input device 1 according to the first embodiment.

  FIG. 2A shows a plan view of the first transparent substrate 10. FIG. 2B shows a partially enlarged cross-sectional view in the vicinity of the outer edge of the light-transmitting region 11 of the first transparent base material 10 cut along the line II-II in FIG. In the steps shown in FIGS. 2A and 2B, first, the first transparent substrate 10 is prepared. The first transparent substrate 10 is formed in a film shape using a transparent resin material such as PET (polyethylene terephthalate). The thickness is about 100 μm to 200 μm, for example, about 125 μm. A window-like light-transmitting region 11 that transmits visible light is set on the first transparent substrate 10. The first transparent base material 10 constitutes the input surface of the input device 1, and the translucent region 11 is a region for transmitting a display image from an external display device such as a liquid crystal display laminated with the input device 1. . Further, when devices such as cameras and various sensors are arranged, a plurality of light-transmitting regions 11 are provided corresponding to the positions.

  Next, as shown in FIG. 2A and FIG. 2B, a plurality of first outer surfaces are provided on one surface of the first transparent base material 10 with a predetermined distance s from the translucent region 11. The decoration part 21a is formed. In the present embodiment, the plurality of first decorating portions 21 a are arranged with an interval in a region surrounding the outer periphery of the light transmitting region 11. The aspect of the 1st decoration part 21a is not restricted to this, When it may be formed in a part of outer periphery, and even if the 1st decoration part 21a is connected and formed, it comprises a complicated shape There is also. The 1st decorating layer 21 is comprised by this some 1st decorating part 21a.

  Further, as shown in FIGS. 2A and 2B, the first decorative portion 21 a adjacent to the light transmitting region 11 is formed with a predetermined distance s from the light transmitting region 11. The interval is preferably 100 μm to 1 mm, and more preferably about 0.5 mm, for example.

  In the present embodiment, the first decorative layer 21 forms a pattern decorative layer that displays a pattern, a pattern, a character, or the like for decorating the input surface of the input device 1.

  Moreover, the 1st decoration part 21a is formed by printing methods, such as screen printing, inkjet printing, gravure printing, and offset printing. By forming by a printing method, it is possible to form a decorative layer relatively easily and inexpensively. Moreover, the formation method of the 1st decorating layer 21 is not restricted to the printing method, The 1st decorating layer 21 is formed by the transfer method which transfers a decorating layer from the decorating sheet in which the 1st decorating layer is formed beforehand, or a vapor deposition method. Is also possible.

  Next, in the process illustrated in FIG. 3, the exposed portion and the first decorative layer 21 where the first decorative portion 21 a on one surface of the first transparent base material 10 is not formed outside the light-transmitting region 11. And the second decorative layer 22 is laminated. FIG. 3 shows a partially enlarged cross-sectional view near the boundary between the translucent region 11 and the decorative region of the first transparent substrate 10. Thus, in the process shown in FIG.2 and FIG.3, by forming the 1st decoration layer 21 and the 2nd decoration layer 22, the decoration level | step difference in the boundary of the translucent area | region 11 and its periphery decoration area | region The thickness of the second decorative layer 22 can be made only one, and even when it has a multi-layered decorative layer, it is possible to reduce the decorative step.

  Similarly to the first decorative layer 21, the second decorative layer 22 can be formed by a printing method such as screen printing, inkjet printing, gravure printing, or offset printing.

  Both the first decorative layer 21 and the second decorative layer 22 can be formed with a thickness of about 1 μm to 20 μm, for example, with a thickness of about 6 μm.

  Further, by laminating the second decorative layer 22, the decorative region on the outer periphery of the translucent region 11 has a shielding effect, and when viewed from the outside, the upper wiring pattern 34 and the lower wiring pattern 35 are directly visually recognized. Disappear. Moreover, when the operator sees from the outside, the 2nd decoration layer 22 also has the decorative effect which comprises the background color of the 1st decoration layer 21. FIG.

  Next, in the step shown in FIG. 4, the first transparent substrate 10 and the second transparent substrate 30 are bonded together via a transparent adhesive material 41. FIG. 4 is a partially enlarged cross-sectional view of the input device 1. An upper transparent electrode layer 32 for detecting input position information is laminated on one surface of the film-like second transparent base material 30, and an upper transparent electrode layer 32 and an outer periphery of the upper transparent electrode layer 32 are laminated. An upper wiring pattern 34 for connecting to an external circuit is formed. In the process of FIG. 4, the other surface of the second transparent substrate 30 and one surface of the first transparent substrate 10 (surface on which the first decorative layer 21 and the second decorative layer 22 are laminated) and Are bonded together via the first adhesive layer 41.

  Next, the 3rd transparent base material 31 in which the lower transparent electrode layer 33 and the lower wiring pattern 35 were formed in the one surface is prepared. The third transparent substrate 31 and the second transparent substrate 30 are disposed with a space provided so that the transparent electrode layers face each other. The 2nd transparent base material 30 and the 3rd transparent base material 31 are adhere | attached through the 2nd adhesion layer 42. FIG. Through the above steps, the input device 1 having a multi-layered decorative layer can be formed, and the input device 1 constitutes a resistive touch panel that can detect input position information by a pressing operation.

  The second transparent substrate 30 is a film-like resin material, and for example, PET (polyethylene terephthalate) can be used. The thickness of the second transparent substrate 30 can be formed to about 100 μm to 200 μm, for example, 188 μm. The third transparent substrate 31 is formed of a transparent resin, and for example, a resin such as PMMA (methyl methacrylate resin), PC (polycarbonate), PET (polyethylene terephthalate), PES (polyether sulfone), norbornene resin, or the like. The thickness is 0.5 to 1.5 mm, for example, about 1.0 mm.

Each of the upper transparent electrode film 32 and the lower transparent electrode film 33 is a transparent conductive material such as ITO (Indium Tin Oxide), SnO ₂ , or ZnO that has translucency in the visible light region, and is formed by sputtering or vapor deposition. Is done. In the present embodiment, ITO is used as the upper transparent electrode film 32, and the thickness thereof is 0.01 μm to 0.05 μm, for example, about 0.02 μm. In addition to the sputtering method and the vapor deposition method, a film on which a transparent conductive film is formed in advance is prepared, and a method of transferring only the transparent conductive film to a substrate or a method of applying a liquid raw material may be used. Is possible.

  The upper wiring pattern 34 and the lower wiring pattern 35 are formed by a printing method using a conductive paste containing a conductive material such as copper or silver. By using the printing method, the upper wiring pattern 34 can be easily formed at low cost. In addition to the printing method, it is also possible to form a thin film by sputtering or vapor deposition as in the case of the upper transparent electrode layer 32.

  For the first adhesive layer 41 and the second adhesive layer 42, an adhesive tape made of an acrylic resin that transmits visible light can be used. An adhesive tape having a thickness of about 50 μm was used for the first adhesive layer 41 and an adhesive tape having a thickness of about 25 μm was used for the second adhesive layer 42.

  In the present embodiment, a resin substrate having a thickness of 0.5 mm to 1.5 mm, for example, about 1.0 mm is used as the third transparent substrate 31. However, the present invention is not limited thereto, and a film-like resin material is used. Also good. In this case, an input device is configured by attaching a supporting base material to the lower portion of the third transparent base material 31.

  In the manufacturing method of the input device 1 according to the present embodiment, the first decorative layer 21 is formed outside the light transmitting region 11 with a predetermined distance s from the light transmitting region 11. Thereby, the level difference near the boundary of the translucent area 11 is only the level difference due to the second decorative layer 22, and the level difference of the decorative layer at the outer edge of the translucent area 11 can be reduced. Even if a multi-layer decorative layer is formed by reducing the step at the outer edge of the light-transmitting region 11, the step can be absorbed by the viscoelasticity of the first adhesive layer 41. It is possible to suppress the generation of bubbles at the step portion of the outer edge. Furthermore, since the second decorative layer 22 and the first decorative layer 21 form a step-like cross-sectional shape from the outer edge of the translucent region 11 to the outside, they are formed as a gentle slope as a whole. . Thereby, when the 1st transparent base material 10 and the 2nd transparent base material 30 are bonded together via the 1st adhesion layer 41, the influence of the decoration level difference of the translucent area | region 11 outer periphery has the 1st transparent base material 10. The input surface of the input device 1 is formed flat.

  FIG. 5A and FIG. 5B are process diagrams of a method for manufacturing the input device 1 which is a modification of the first embodiment. FIG. 5 (a) shows an uneven recess formed on the surface of the second decorative layer 22 outside the light-transmitting region 11 and a predetermined distance after the step shown in FIG. 3 is a step of laminating three decorative layers 23. By laminating the third decorative layer 23, the unevenness of the surface of the second decorative layer 22 formed by reflecting the unevenness of the first decorative layer 21 is flattened.

  As with the first decorative layer 21 and the second decorative layer 22, the third decorative layer 23 is preferably formed by a printing method such as screen printing, inkjet printing, gravure printing, or offset printing. Thereby, the 3rd decorating layer 23 can be formed easily and cheaply. In addition, it is preferable to print on the third decorative layer 23 using the same color ink as that of the second decorative layer 22, and this causes a problem in appearance even when the operator views from the outside. There is nothing.

  In FIG.5 (b), the 1st transparent base material 10 which laminated | stacked the 1st decorating layer 21, the 2nd decorating layer 22, and the 3rd decorating layer 23, the 2nd transparent base material 30, and the 3rd transparent base The process of laminating | stacking the material 31 is shown, and the partial expanded sectional view of the translucent area | region 11 vicinity of the input device 1 is shown. Also in this modified example, the first decorative layer 21 and the third decorative layer 23 are stacked with a predetermined distance from the light transmitting region 11, thereby reducing a step near the boundary of the light transmitting region 11. It has become possible. Thereby, generation | occurrence | production of the bubble in the level | step-difference part of the outer edge of the translucent area | region 11 can be suppressed, and the influence of a level | step difference does not appear on the surface of the 1st transparent base material 10 in the translucent area | region 11 outer edge part.

  Moreover, since the surface of the 2nd decoration layer 22 is uneven | corrugated so that the unevenness | corrugation of the surface of the 1st decoration layer 21 and the 1st transparent base material 10 may be formed, a 3rd decoration layer is used. When the first transparent base material 10 and the second transparent base material 30 are bonded together via the first adhesive layer 41 without being formed, the surface of the first transparent base material 10 is affected by the unevenness of the second decorative layer 22. Asperities may be formed on the surface. According to this modification, the surface of the decoration region is formed flat by providing the third decoration layer 23 in the concave and convex recesses on the surface of the second decoration layer 22, and the input device has good flatness. 1 can be provided.

  FIG. 6A to FIG. 6C are process diagrams of a method for manufacturing the input device 1 which is another modification of the first embodiment. 6A, after the step shown in FIG. 2 in the first embodiment, the outer side of the first transparent base material 10 on the one side of the first transparent substrate 10 is provided outside the light-transmitting region 11 with a predetermined distance. In this step, the third decorative layer 23 is formed in the concave and convex portions formed by the exposed portion where the first decorative portion 21a is not formed and the first decorative layer 21. Thus, the unevenness | corrugation of the 1st decorating layer 21 and the 1st transparent base material 10 is planarized by laminating | stacking the 3rd decorating layer 23. FIG.

  FIG. 6B is a process of laminating the second decorative layer 22 on the outer side of the translucent region 11 so as to cover the first decorative layer 21 and the third decorative layer 23. In such a process, by laminating the first decorative layer 21, the second decorative layer 22, and the third decorative layer 23, the surface of the second decorative layer 22 is flattened and laminated. Things will be possible.

  FIG. 6C shows a step of laminating the first transparent base material 10, the second transparent base material 30 and the third transparent base material 31 produced in FIG. Also in this modified example, since the surface of the second decorative layer 22 is formed flat, even when the second decorative base material 30 is bonded to the second transparent base material 30 via the first adhesive layer 41, the light transmitting region 11. The surface of the first transparent substrate 10 on the outside is kept flat, and the input device 1 with good flatness can be provided.

<Second Embodiment>
7 to 10 show process diagrams of the method of manufacturing the input device 1 according to the second embodiment. Detailed descriptions of the same contents as those in the first embodiment are omitted.

  7A is a plan view of the first transparent substrate 10, and FIG. 7B is a transparent region 11 boundary of the first transparent substrate 10 cut along the line VII-VII in FIG. 7A. The partial expanded sectional view of the vicinity is shown. In the steps of FIG. 7A and FIG. 7B, the rim layer 24 is formed so as to surround the light transmitting region 11 of the film-like first transparent base material 10. The border layer 24 is formed by a printing method such as screen printing, inkjet printing, gravure printing, or offset printing. The border layer 24 is provided to make a display image from an external display device such as a liquid crystal display stand out.

  8A is a plan view of the first transparent substrate 10, and FIG. 8B is an outer edge of the transparent region 11 of the first transparent substrate 10 cut along the line VIII-VIII in FIG. 7A. The partial expanded sectional view of the vicinity is shown. 8 (a) and 8 (b) are composed of a plurality of first decorating portions 21a on the one side of the first transparent base material 10 on the outer side provided with the border layer 24 and a predetermined interval m. The process of forming the 1st decorating layer 21 to be performed is shown. The 1st decoration layer 21 is a pattern decoration layer which displays a pattern, a pattern, a character, a mark, etc. for decorating the input surface of the input device 1 similarly to 1st Embodiment. Although the 1st decoration part 21a shown to Fig.8 (a) displays the same mark and is arranged with the space | interval, it is not restricted to this, Each is displaying different patterns, designs, characters, marks, etc. Alternatively, the first decorative portions 21a may be connected to each other.

  FIG. 9 shows an exposed portion and a first decorative layer in which the first decorative portion 21 a on one surface of the first transparent base material 10 is not formed outside the light-transmitting region 11 of the first transparent base material 10. 21, and the second decorative layer 22 is laminated across the border layer 24. The second decorative layer 22 is formed on the outer side with a predetermined distance n from the translucent region 11, and the inner end portion of the second decorative layer 22 is laminated so as to overlap the border layer 24. The decorative layer 22 does not protrude into the translucent region 11. Thus, by forming the 2nd decoration layer 22, while obtaining the shielding effect of a decoration layer, it is visually recognized by the input device 1 as a background color of the 1st decoration layer 21 from the operator.

  8 and 9, the first decorative layer 21 and the second decorative layer 22 are preferably formed by a printing method such as screen printing, inkjet printing, gravure printing, offset printing, and the like. A decorative layer can be formed at low cost.

  Next, in the step shown in FIG. 10, one surface of the first transparent substrate 10 (the surface on which the border layer 24, the first decorative layer 21, and the second decorative layer 22 are laminated), the second transparent substrate 30, Are bonded together via the transparent first adhesive layer 41. Next, the second transparent base material 30 and the third transparent base material 31 are arranged to face each other with a space therebetween, and are bonded via the second adhesive material 42. An upper transparent electrode layer 32 and a lower transparent electrode layer 33 are laminated on the opposing surfaces of the second transparent substrate 30 and the third transparent substrate 31, respectively, and the periphery of the upper transparent electrode layer 32 and the lower transparent electrode layer 33. Each has an upper wiring pattern 34 and a lower wiring pattern 35 stacked thereon.

  The input device 1 is formed by the processes shown in FIGS. 7 to 10, and the input device 1 constitutes a resistive touch panel also in the second embodiment.

  The input device 1 according to the second embodiment has a configuration including three layers of a border layer 24, a first decorative layer 21, and a second decorative layer 22. When the three layers are laminated and a step is generated at the outer edge of the light transmitting region 11, the step is about 15 to 30 μm. This step is difficult to absorb due to the viscoelasticity of the first adhesive layer 41, and bubbles are generated at the outer edge of the translucent region 11. Or a level | step difference will arise in the surface of the 1st transparent base material 10, and it will become a problem on an external appearance. In the steps shown in FIGS. 7 to 9 of the second embodiment, the first decorative layer 21 is formed outside the border layer 24 and a predetermined distance m, and the light transmitting region 11 and the predetermined distance n are set. By forming the second decorative layer 22 on the provided outer side, the step on the outer edge of the translucent region 11 can be made only the step on the border layer 24. Thereby, even when the decorative layer is formed in multiple layers, it is possible to reduce the step of the outer edge of the light transmitting region 11, the generation of bubbles, and the outer edge of the light transmitting region 11 on the surface of the first transparent substrate 10. It can suppress that a level difference arises in a part.

  FIG. 11A and FIG. 11B are process diagrams of a method for manufacturing the input device 1 which is a modification of the second embodiment. In FIG. 11A, after the step shown in FIG. 9, the third decorative layer 23 is laminated on the concave and convex portions formed on the surface of the second decorative layer 22 outside the border layer 24. It is a process to do. By laminating the third decorative layer 23, the unevenness of the surface of the second decorative layer 22 formed under the influence of the first decorative layer 21 is flattened.

  FIG. 11B shows a step of laminating the first transparent base material 10, the second transparent base material 30, and the third transparent base material 31 after FIG. 11A. Also in this modification, by reducing the decorative step at the outer edge of the light-transmitting region 11, when the first transparent base material 10 and the second transparent base material 30 are bonded together via the first adhesive layer 41, Generation | occurrence | production of a bubble and generation | occurrence | production of the level | step difference of the 1st transparent base material 10 surface can be prevented. In addition, by laminating the third decorative layer 23 and flattening the irregularities on the surface of the second decorative layer 22, irregularities do not occur outside the translucent region 11 on the surface of the first transparent substrate 10, It is possible to provide the input device 1 having a flat input surface.

  FIG. 12A to FIG. 12C are process diagrams illustrating another modification of the method for manufacturing the input device 1 according to the second embodiment. In the present modification, in the process of FIG. 12A, after the process of FIG. 8, the first decorative portion 21a on one surface of the first transparent base material 10 is formed outside the border layer 24. A third decorative layer 23 is formed in a concave and convex recess composed of the exposed portion and the first decorative layer 21.

  After the step of FIG. 12A, the second decorative layer 22 is covered with the first decorative layer 21 and the third decorative layer 23 as shown in FIG. It is stacked on the outside of the translucent area 11 across the board. By laminating the third decorative layer 23, the unevenness constituted by the first decorative layer 21 is flattened, and the second decorative layer 22 can be laminated flat.

  Thus, in the step of FIG. 12C, when the first transparent substrate 10 and the second transparent substrate 30 are bonded together via the first adhesive layer 41 to configure the input device 1, the first transparent substrate It is possible to provide the input device 1 having a flat decorative region without unevenness outside the light transmitting region 11 on the surface of the material 10.

DESCRIPTION OF SYMBOLS 1 ... Input device 10 ... 1st transparent base material 11 ... Translucent area | region 21 ... 1st decorating layer 21a ... 1st decorating part 22 ... 2nd decorating layer 23 ... 3rd decorative layer 24 ... Border layer 30 ... 2nd transparent substrate 31 ... 3rd transparent substrate 32 ... Upper transparent electrode layer 33 ... Lower transparent electrode layer 34 ..Upper wiring pattern 35 ... Lower wiring pattern 41 ... First adhesive layer 42 ... Second adhesive layer

Claims (12)

A method for manufacturing an input device, comprising:
(A) A window-like light-transmitting region that transmits visible light is set on one surface of the film-shaped first transparent base material, and a plurality of first additions are provided on the outer side with a predetermined distance from the light-transmitting region. Forming a first decorative layer composed of a decorative part;
(B) Outside the translucent region, a second decoration is provided so as to cover an exposed portion of the one surface of the first transparent base material on which the first decoration portion is not formed and the first decoration layer. Laminating layers;
(C) Translucent the other surface of the film-like second transparent substrate on which the transparent electrode layer for detecting the input position information is formed on one surface and the one surface of the first transparent substrate. And a step of pasting together through a sticky adhesive layer.   After the step (b), a step of laminating the third decorative layer on the concave and convex portions formed on the surface of the second decorative layer outside the translucent region with a predetermined interval. The manufacturing method of the input device of Claim 1 characterized by the above-mentioned. After the step (a), the exposed portion in which the first decorative portion of the one surface of the first transparent base material is not formed on the outer side with a predetermined distance from the translucent region, and the Forming a third decorative layer in a concave-convex recess composed of the first decorative layer;
In the step (b), the first decorative layer and the third decorative layer are covered by the second decorative layer, and are laminated outside the translucent region. A method for manufacturing the input device according to 1.   The method for manufacturing an input device according to claim 2, wherein the third decorative layer is formed by a printing method.   The method for manufacturing an input device according to claim 1, wherein the first decorative layer and the second decorative layer are formed by a printing method.   In the step (b), a pattern decoration layer for displaying a pattern, a pattern, a character, a mark, or the like is formed by the first decoration layer. A method for manufacturing an input device according to one item. A method for manufacturing an input device, comprising:
(A) setting a window-like light-transmitting region that transmits visible light on one surface of the film-like first transparent base material, and forming a border layer so as to surround the light-transmitting region;
(B) forming a first decoration layer composed of a plurality of first decoration portions on the outer surface of the first transparent substrate on the outer surface with a predetermined distance from the border layer;
(C) Outside the translucent region, the exposed portion of the first transparent base material on which one of the first decorative portions is not formed and the first decorative layer are covered, and the edging is covered Laminating the second decorative layer across the layers;
(D) Translucent the other surface of the film-like second transparent substrate on which the transparent electrode layer for detecting input position information is formed on one surface thereof, and one surface of the first transparent substrate. A step of bonding through the adhesive layer,
The manufacturing method of the input device characterized by including.   After the step (c), the method includes a step of laminating a third decorative layer on the concave and convex portions formed on the surface of the second decorative layer outside the border layer. The manufacturing method of the input device of Claim 7. After the step (b), at the outside of the border layer, the exposed portion where the first decorative portion of one surface of the first transparent base material is not formed and the first decorative layer Including a step of forming a third decorative layer in the concave and convex recesses configured,
In the step (c), the first decorative layer and the third decorative layer are covered with the second decorative layer, and are laminated outside the light-transmitting region across the border layer. The method of manufacturing an input device according to claim 7, wherein:   The method for manufacturing an input device according to claim 8, wherein the third decorative layer is formed by a printing method.   The method for manufacturing an input device according to any one of claims 7 to 10, wherein the first decorative layer and the second decorative layer are formed by a printing method. In the step (b), a pattern decoration layer for displaying a pattern, a pattern, a character, a mark, or the like is formed by the first decoration layer. A method for manufacturing an input device according to one item.

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