JP6213737B2 - Touch panel device and method for manufacturing touch panel device - Google Patents

Description

  The present invention relates to a touch panel device and a method for manufacturing the touch panel device.

In recent years, a touch panel device using a capacitive sensor sheet has been installed on an instrument cluster panel of an automobile, and various devices (for example, a car navigation device, an audio device, an air conditioner, a window opening / closing device) mounted on the automobile by the touch panel device. Techniques for operating devices) have been proposed.
For example, Patent Document 1 discloses a flexible electrostatic sensor sheet (electrostatic) in which a conductive layer is formed on a base layer on the back side of an insulating housing (panel material) corresponding to an automobile center console or the like. A technique in which a capacitive sensor sheet) is attached is disclosed.

JP 2012-154629 A

Conventionally, when a capacitance sensor sheet is adhered and fixed to the back surface side of a panel material constituting a touch panel device, and a decorative layer is formed on the front surface side of the panel material, the surface design formed by the decorative layer ( If the position of the character / pattern / design) and the capacitance sensor sheet is misaligned, light may leak from the transparent part of the decorative layer, which may impair the design. It was necessary to increase the positioning accuracy of the sensor sheet (positioning accuracy between the decorative layer and the capacitance sensor sheet).
Moreover, in order to ensure the working range (operation range) of the capacitance sensor sheet, it is necessary to increase the positioning accuracy of the capacitance sensor sheet with respect to the decorative layer.

This is because only the surface design of the decorative layer is required, and both the alignment between the decorative layer and the capacitance sensor sheet and the prevention of light leakage from the transparent portion of the decorative layer are required.
However, since the instrument cluster panel has a three-dimensional curved shape (round shape), it is difficult to accurately position and form the decorative layer surface design according to the curved shape. There is a limit to increasing the positioning accuracy between the capacitor sensor sheet and the capacitance sensor sheet. In particular, the larger the product, the more difficult it is to increase the positioning accuracy.
In addition, when a pinhole or a thin film thickness occurs in the opaque portion of the decorative layer, there is a risk of light leakage from the pinhole or a thin film thickness.

The present invention has been made to solve the above problems, and has the following objects.
(1) Provided is a touch panel device that prevents light from leaking from a decorative layer and prevents design properties from being hindered, and that can surely secure an operation range of a capacitance sensor sheet.
(2) Provide a simple manufacturing method of the touch panel device of (1).

  As a result of intensive studies in order to solve the above-mentioned problems, the present inventors have arrived at each aspect of the present invention as follows.

<First aspect>
The first aspect is
Panel material made of transparent material,
A first decorative layer formed on the surface side of the panel material;
A second decorative layer formed on the back side of the panel material;
A touch panel device including a capacitance sensor sheet adhered and fixed to the back side of the panel material,
Each decorative layer has a transparent portion and an opaque portion, and the transparent portion and the opaque portion of each decorative layer are formed in substantially the same size and shape in plan view when the touch panel device is viewed from the front side. It arrange | positions so that the transparent part and opaque part of a decoration layer may overlap, respectively.

In the 1st situation, since the decoration layer has the double structure of the 1st decoration layer and the 2nd decoration layer, it is the 2nd decoration compared with the case where only the 1st decoration layer is provided. The allowable dimension (allowable range) of the opaque portion of the first decorative layer can be increased by the amount of the layer provided.
In addition, in the first aspect, even if pinholes and thin portions of the film thickness are generated in each decorative layer, the pinholes and thin portions of the decorative layers are unlikely to overlap. It is possible to prevent light leakage from a pinhole in one decorative layer or a portion having a small film thickness.
Therefore, according to the 1st situation, it becomes difficult to produce position shift with each decoration layer and a capacitance sensor sheet, and positioning accuracy with the decoration range by each decoration layer, and the operation range of a capacitance sensor sheet Therefore, it is possible to prevent the design property from being disturbed by causing light leakage from each decorative layer, and to ensure the working range of the capacitance sensor sheet.

<Second aspect>
According to a second aspect, in the first aspect, the second decorative layer is directly formed on one surface side of the capacitance sensor sheet, and the second decorative layer is bonded and fixed to the back surface side of the panel material via the adhesive layer. Has been.
When the panel material is large and has a three-dimensional curved shape, the panel material is likely to cause molding distortion, and the first decorative layer is formed on the surface side of the panel material. Due to the influence, the transparent portion and the opaque portion of the first decorative layer are likely to be misaligned.

In the second aspect, since the second decorative layer 13 is directly formed on one surface side of the capacitance sensor sheet, it is planar and smaller than the panel material when the capacitance sensor sheet is a single object. In this case, it is easy to accurately position and form the transparent portion and the opaque portion of the second decorative layer, and the positioning accuracy between the second decorative layer and the capacitance sensor sheet can be increased. .
Therefore, according to the second aspect, even if the first decorative layer is likely to be misaligned, the first aspect is achieved by increasing the positioning accuracy between the second decorative layer 13 and the capacitance sensor sheet. The above-mentioned actions and effects can be obtained with certainty.

<Third aspect>
According to a third aspect, in the first aspect, the second decorative layer is directly formed on the back side of the panel material, and the capacitance sensor sheet is bonded and fixed to the second decorative layer through the adhesive layer. .
In the third aspect, the second decorative layer is formed directly on the back surface side of the panel material, but the second decorative layer may be formed only on the portion of the panel material facing the capacitance sensor sheet.

Therefore, in the 3rd situation, since the area of the 2nd decoration layer becomes small compared with the 1st decoration layer and the 2nd decoration layer becomes difficult to receive the influence of molding distortion of a panel material, it is 2nd It is easy to accurately position and form the transparent portion and the opaque portion of the decorative layer, and the positioning accuracy between the second decorative layer and the capacitance sensor sheet can be increased.
Therefore, according to the third aspect, even if the first decorative layer is likely to be displaced, the first aspect is improved by increasing the positioning accuracy between the second decorative layer 13 and the capacitance sensor sheet. The above-mentioned actions and effects can be obtained with certainty.

<Fourth aspect>
The fourth aspect is the first to third aspects,
A third decorative layer formed on the surface opposite to the surface facing the panel material in the capacitance sensor sheet,
The third decorative layer has a transparent portion and an opaque portion, and the transparent portion and the opaque portion of each decorative layer including the third decorative layer have substantially the same dimensions in plan view when the touch panel device is viewed from the surface side. It is formed in a shape, and is arranged so that the transparent portion and the opaque portion of each decorative layer overlap each other.

In the 4th situation, since the decoration layer has the triple structure of the 1st-3rd decoration layer, compared with the 1st situation, the 2nd decoration layer and the 3rd decoration layer were provided. Due to this synergistic effect, the allowable dimension (allowable range) of the opaque portion of the first decorative layer can be further increased.
In addition, in the fourth aspect, even if pinholes and thin portions are formed in each decorative layer, the possibility of overlapping pinholes and thin portions in each decorative layer is very low. Compared to the first aspect, it is possible to more reliably prevent light leakage from a pinhole or a thin portion of the first decorative layer.
Therefore, according to the fourth aspect, the action and effect of the first aspect can be further enhanced.

<5th aspect>
According to a fifth aspect, in the first to fourth aspects, the panel material is formed of a synthetic resin material having a three-dimensional curved shape.
In the fifth aspect, since a synthetic resin material is used as a material for forming the panel material, a three-dimensional curved shape can be easily formed as compared with the case where a glass material is used.

<Sixth aspect>
6th aspect is a manufacturing method of the touch panel device of the 2nd aspect, Comprising: The process of forming a 1st decoration layer in the surface side of a panel material, and 2nd decoration on the one surface side of an electrostatic capacitance sensor sheet The second decorative layer is a capacitance sensor sheet in which the second decorative layer is formed with respect to the step of forming the layer and the back side of the panel material on which the first decorative layer is formed on the front side. And a step of sticking and fixing the second decorative layer to the back side of the panel material via an adhesive layer.
According to the sixth aspect, a simple manufacturing method of the touch panel device of the second aspect can be provided.

<Seventh aspect>
7th aspect is a manufacturing method of the touch panel device of the 3rd aspect, Comprising: The process of forming the 1st decoration layer in the surface side of a panel material, and forming the 2nd decoration layer in the back surface side of a panel material And a step of attaching and fixing the capacitance sensor sheet to the second decorative layer via an adhesive layer.
According to the seventh aspect, a simple manufacturing method of the touch panel device of the third aspect can be provided.

<Eighth aspect>
The eighth aspect is a method for manufacturing the touch panel device according to the sixth aspect or the seventh aspect, and includes a step of forming the second decorative layer by printing.
In the eighth aspect, the second decorative layer can be easily formed, and the sixth aspect or the seventh aspect can be reliably realized.

It is a longitudinal cross-sectional view which shows schematic structure of the touchscreen apparatus 10 of 1st Embodiment which actualized this invention, and is XX arrow sectional drawing shown in FIG. The front view of the center panel 20 which comprises the instrument cluster panel of the motor vehicle in which the touch panel apparatus 10 was installed. The schematic sectional drawing for demonstrating the manufacturing method of the panel material 11 of the touchscreen apparatus 10, and the 1st decoration layer 12. FIG. The schematic sectional drawing for demonstrating the manufacturing method of the panel material 11 of the touchscreen apparatus 10, and the 1st decoration layer 12. FIG. 5A and 5B are longitudinal sectional views for explaining the operation and effect of the touch panel device 10, in which FIG. 5A is a longitudinal sectional view of the touch panel device 10, and FIG. 5B is a sectional view of a conventional touch panel device 100. It is a longitudinal cross-sectional view which shows schematic structure of the touchscreen apparatus 40 of 2nd Embodiment which actualized this invention, and is XX arrow sectional drawing shown in FIG. It is a longitudinal cross-sectional view which shows schematic structure of the touchscreen apparatus 50 of 3rd Embodiment which actualized this invention, and is XX arrow sectional drawing shown in FIG.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings. In each embodiment, the same constituent members and constituent elements are denoted by the same reference numerals, and redundant description of the same contents is omitted.
Moreover, in each drawing, in order to make the explanation easy to understand, the dimensional shape and arrangement location of the constituent members of each embodiment are schematically illustrated in an exaggerated manner, and the dimensional shape and arrangement location of each constituent member are the real thing. May not always match.

<First Embodiment>
As shown in FIG. 1, the touch panel device 10 according to the first embodiment includes a panel material 11, a first decorative layer 12 (transparent portion 12a, opaque portion 12b, pinhole 12c), and a second decorative layer 13 (transparent portion). 13a, opaque portion 13b, pinhole 13c), adhesive layer 14 and capacitance sensor sheet 15.
On the back side of the touch panel device 10, a light source LS such as an LED (Light Emitting Diode) or a light bulb is disposed.

The panel material (base material) 11 is formed of a plate-shaped transparent synthetic resin material having a substantially uniform plate thickness. Examples of the material for forming the panel material 11 include PP (PolyPropylene) and TPO (Thermo PolyOlefin). , PVC (PolyVinyl Chloride), PC (PolyCarbonate), PMMA (PolyMethyl Methacrylate), COP (Cyclo Olefin Polymer), ABS (Acrylonitrile-Butadiene-Styrene resin), PET (PolyEthylene Terephthalate), PE (PolyEthylene), Polyurethane, Polyisosol There is a bid.
The panel material 11 has a thickness of about 2.0 to 3.5 mm.

The first decorative layer 12 is made of a synthetic resin paint having a transparent portion 12a and an opaque portion (light shielding portion) 12b, and is directly printed on the surface side of the panel material 11 (the surface side of the touch panel device 10). ing.
The second decorative layer 13 is made of a synthetic resin paint having a transparent portion 13a and an opaque portion 12b, and is formed on the back side of the panel material 11 (the back side of the touch panel device 10) via the adhesive layer 14.
Each decorative layer 12, 13 forms a surface design (characters, patterns, designs, etc.) with transparent portions 12a, 13a and opaque portions 12b, 13b.

The transparent portions 12a and 13a and the opaque portions 12b and 13b of the decorative layers 12 and 13 are formed in substantially the same size and shape in a plan view when the touch panel device 10 is viewed from the surface side, and the transparent portions 12a and 13a are formed. The opaque portions 12b and 13b are arranged so as to overlap each other.
Pinholes 12c and 13c, which are through holes generated unnecessarily in the decorative layers 12 and 13, are formed in the opaque portions 12b and 13b of the decorative layers 12 and 13, respectively.
Examples of the material for forming the decorative layers 12 and 13 include PC, PET, PMMA, and COP.
The film thickness of each decoration layer 12 and 13 is about 2-50 micrometers.

The adhesive layer 14 is made of a transparent material that adheres and fixes the second decorative layer 13 and the panel material 11. Examples of the material for forming the adhesive layer 14 include a highly transparent adhesive transfer tape (OCA tape: Optically Clear Adhesive). Tape).
The film thickness of the adhesive layer 14 is about 20 to 70 μm.

The capacitance sensor sheet (capacitance film sensor) 15 includes an insulating base film layer (not shown) and a conductive layer in which a plurality of electrode patterns and conductive lead lines are formed on the base film layer. (Not shown) and an insulating protective cover layer (not shown) covering the conductive layer, etc., and each layer constituting the capacitance sensor sheet 15 is made of a transparent material.
Further, the capacitance sensor sheet 15 has flexibility, and has a planar shape when it is a single object to which no external force is applied.
In addition, since the structure of the electrostatic capacitance sensor sheet | seat 15 is a well-known technique (for example, refer patent document 1), description is abbreviate | omitted.
The second decorative layer 13 is directly printed on the one surface side of the capacitance sensor sheet 15 (the surface side facing the panel material 11).

As shown in FIG. 2, the touch panel device 10 is installed on a center panel 20 that forms an instrument cluster panel of an automobile, and the panel material 11 of the touch panel device 10 is shared with the panel material of the center panel 20.
In the example illustrated in FIG. 2, the transparent portions 12 a and 13 a of the decorative layers 12 and 13 have a rectangular shape in plan view, and the transparent portions 12 a and 13 a form a surface design indicating a switch portion of the touch panel device 10. ing.

Then, when the fingertip of the user of the touch panel device 10 touches the surface of the first decorative layer 12, the static that exists between the capacitance sensor sheet 15 on the back surface side of the first decorative layer 12 and the user's human body. Since the capacitance (floating capacitance) changes, the capacitance sensor sheet 15 indicates that the user has touched the transparent portion 12a corresponding to the switch portion of the first decorative layer 12 based on the change in capacitance. Can be detected.
Note that a specific method for detecting a change in capacitance is a known technique (see, for example, Patent Document 1), and thus description thereof is omitted.

When the light source LS arranged on the back side of the touch panel device 10 emits light, the emitted light of the light source LS is changed from the capacitance sensor sheet 15 to the transparent portion 13a of the second decorative layer 13 → the adhesive layer 14 → the panel material 11 → The light passes through the transparent portions 12 a of the first decorative layer 12 and is emitted from the surface side of the touch panel device 10.
Therefore, the transparent portions 12a and 13a of the decorative layers 12 and 13 are brightly illuminated, and the user who views the touch panel device 10 can easily visually recognize the transparent portions 12a and 13a that are the switch portions of the decorative layers 12 and 13. can do.

[Manufacturing Method of Touch Panel Device 10]
In order to manufacture the panel material 11 and the first decorative layer 12 of the touch panel device 10, first, as shown in FIG. 3 (A), a flat base film (support film, carrier film) 30 having a uniform film thickness is formed. A transfer film (decorative film) 31 having the first decorative layer 12 printed on the surface is produced, and the transfer film 31 is fed between the molds 32a and 32b of the injection molding machine.
Examples of the material for forming the base film 30 include PMMA, PET, PE, and polyurethane.

Next, as shown in FIG. 3B, the transfer film 31 is sandwiched between the molds 32a and 32b of the injection molding machine, and the mold is inserted into the gap GR between the movable mold 32a and the transfer film 31. The forming material of the panel material 11 is injected from the molding resin injection port 32c of 32a, and the first decorative layer 12 printed on the transfer film 31 is formed on the panel simultaneously with the injection molding of the panel material 11 by the in-mold transfer molding method. Transfer to the surface side of the material 11.
Subsequently, as shown in FIG. 4A, the movable side mold 32a is separated from the fixed side mold 32b to open the mold, and only the base film 30 is peeled off from the panel material 11 and removed. The panel material 11 in which the 1st decoration layer 12 was formed is produced.
Thereafter, as shown in FIG. 4B, the panel material 11 on which the first decorative layer 12 is formed is taken out from the molds 32a and 32b of the injection molding machine.

Separately, the second decoration layer 13 is printed on the one surface side of the capacitance sensor sheet 15 by using various printing methods (for example, screen printing, pad printing, doctor coating, etc.), thereby providing the second decoration. The capacitance sensor sheet 15 on which the layer 13 is formed is produced.
Here, the second decorative layer 13 can be easily formed by using various printing methods.
And with respect to the back surface side of the panel material 11 in which the 1st decoration layer 12 was formed in the surface side, the 2nd decoration layer 13 is the electrostatic capacitance sensor sheet 15 in which the 2nd decoration layer 13 was formed. The touch panel device 10 can be easily manufactured by disposing the panel member 11 so as to face the panel member 11 and sticking and fixing the second decorative layer 13 to the back surface side of the panel member 11 via the adhesive layer 14.

In addition, in order to produce the panel material 11 in which the 1st decoration layer 12 was formed, you may use not only an in-mold transfer molding method but an insert mold (film insert) molding method, an insert molding method, etc.
Moreover, you may print the 1st decorating layer 12 on the surface side of the panel material 11 produced by injection molding using various printing methods.

[Operations and effects of the first embodiment]
As shown in FIG. 5B, in the conventional touch panel device 100, only the first decorative layer 12 is provided, and the second decorative layer 13 is not provided.
As shown in FIG. 2, the panel material 11 is shared with the panel material of the center panel 20 constituting the instrument cluster panel of the automobile, and the center panel 20 has a three-dimensional curved shape (round shape). The material 11 tends to cause molding distortion.
And since the 1st decoration layer 12 is directly printed and formed with respect to the surface side of the panel material 11, by the influence of the shaping | molding distortion of the panel material 11, the transparent part 12a and the opaque part of the 1st decoration layer 12 12b tends to cause a positional shift.

That is, it is difficult to accurately position and form the surface design composed of the transparent portion 12a and the opaque portion 12b of the first decorative layer 12 in accordance with the panel material 11 having a curved shape. There is a limit to increasing the positioning accuracy between the sensor 12 and the capacitance sensor sheet 15, and it is particularly difficult to increase the positioning accuracy as the panel material 11 becomes larger.
Therefore, in the conventional touch panel device 100, due to the positional deviation between the transparent portion 12a of the first decorative layer 12 and the electrode pattern (not shown) of the capacitance sensor sheet 15, the light leaks from the transparent portion 12a and is designed. In addition to being obstructed, there is a problem that it is impossible to secure the working range (operating range) of the capacitance sensor sheet.

On the other hand, as shown to FIG. 5 (A), in the touch panel apparatus 10 of 1st Embodiment, in addition to the 1st decorating layer 12, the 2nd decorating layer 13 is provided, and 2 decorating layers are provided. It has a heavy structure.
Here, the capacitance sensor sheet 15 is planar when it is a single object to which an external force before being applied and fixed to the panel material 11 is not applied, and is smaller than the panel material 11.
And since the 2nd decoration layer 13 is directly printed and formed with respect to the one surface side of the electrostatic capacitance sensor sheet | seat 15 which is a single-piece | unit, from the transparent part 13a and the opaque part 13b of the 2nd decoration layer 13 It is easy to accurately position and form the formed surface design, and the positioning accuracy between the second decorative layer 13 and the capacitance sensor sheet 15 can be increased.

  Therefore, as shown in FIG. 5 (A), in the touch panel device 10 according to the first embodiment, compared with the conventional touch panel device 100 shown in FIG. Allowable dimensions Pa and Pb of the opaque portion 12b of the first decorative layer 12 can be increased (for example, Pa and Pb = about 1 to 2 mm).

Further, as shown in FIG. 5B, in the conventional touch panel device 100, when a pinhole 12c is generated in the first decorative layer 12, there is a problem that light leaks from the pinhole 12c.
On the other hand, as shown in FIG. 5A, in the touch panel device 10 of the first embodiment, even if the pinholes 12c and 13c are generated in the decorative layers 12 and 13, respectively, the decorative layers 12 and 13 are provided. Since it is unlikely that the 13 pinholes 12c and 13c overlap, light leakage from the pinhole 12c of the first decorative layer 12 can be prevented.

And in the conventional touch panel apparatus 100, even when the thin film thickness location arises in the 1st decoration layer 12, it is from the thin film thickness location of the 1st decoration layer 12 similarly to the case of the pinhole 12c. There was a problem of light leakage.
On the other hand, in the touch panel device 10 according to the first embodiment, even if the thin portions of the decorative layers 12 and 13 are generated, the thin portions of the decorative layers 12 and 13 may overlap. Since the property is low, there is almost no risk of light leakage from the thin portion of the first decorative layer 12.

As described above, in the touch panel device 10 according to the first embodiment, it is difficult for positional deviation between the transparent portions 12a and 13a of the decorative layers 12 and 13 and the electrode pattern (not shown) of the capacitance sensor sheet 15 to occur. The positioning accuracy between the decoration range by the decoration layers 12 and 13 and the operation range of the capacitance sensor sheet 15 can be improved.
Therefore, according to the touch panel device 10 of the first embodiment, light leakage from each of the decorative layers 12 and 13 is prevented, and the design property is prevented from being inhibited, and the working range of the capacitance sensor sheet 15 is ensured. Can be secured.
Moreover, since the panel material 11 is formed of a synthetic resin material having a three-dimensional curved shape, a three-dimensional curved shape can be easily formed as compared with the case where a glass material is used.

Second Embodiment
As shown in FIG. 6, the touch panel device 40 of the second embodiment includes a panel material 11, a first decorative layer 12 (transparent portion 12a, opaque portion 12b, pinhole 12c), and a second decorative layer 13 (transparent portion). 13a, opaque portion 13b, pinhole 13c), adhesive layer 14, capacitance sensor sheet 15, and third decorative layer 41 (transparent portion 41a, opaque portion 41b, pinhole 41c), and the back side of touch panel device 40 Is provided with a light source LS.
The touch panel device 40 is different from the touch panel device 10 of the first embodiment in that a third decorative layer 41 is provided.

The 3rd decoration layer 41 consists of a synthetic resin coating material which has the transparent part 41a and the opaque part 12b which forms a surface design, and is a surface on the opposite side to the surface facing the panel material 11 in the electrostatic capacitance sensor sheet 15 (touch panel). It is printed directly on the back side of the apparatus 40.
The transparent portions 12a, 13a, 41a and the opaque portions 12b, 13b, 41b of the decorative layers 12, 13, 41 are formed in substantially the same size and shape in plan view when the touch panel device 40 is viewed from the surface side. The transparent parts 12a, 13a, 41a and the opaque parts 12b, 13b, 41b are arranged so as to overlap each other.
A pinhole 41 c that is a through hole formed in the third decorative layer 41 is formed in the opaque portion 41 b of the third decorative layer 41.
The formation material of the 3rd decoration layer 41 is the same as each decoration layer 12 and 13, and the film thickness of the 3rd decoration layer 41 is also the same as each decoration layer 12 and 13.

Therefore, according to the touch panel apparatus 40 of 2nd Embodiment, the said effect | action and effect of 1st Embodiment can be acquired.
In addition, in the touch panel device 40, the third decorative layer 41 is provided in addition to the decorative layers 12 and 13, and the decorative layer has a triple structure.

Since the 3rd decoration layer 41 is directly printed and formed with respect to the one surface side of the capacitance sensor sheet 15 which is a single substance like the 2nd decoration layer 13, the 3rd decoration layer 41 It is easy to accurately position and form the surface design composed of the transparent portion 41a and the opaque portion 41b, and the positioning accuracy between the third decorative layer 41 and the capacitance sensor sheet 15 can be increased.
Therefore, in the touch panel device 40 of the second embodiment, the allowable dimension (allowable range) of the opaque portion 12b of the first decorative layer 12 is further increased due to the synergistic effect by providing the decorative layers 13 and 41. Can do.

  Further, in the touch panel device 40 of the second embodiment, even if pinholes 12c, 13c, 41c and thin portions are formed in the decorative layers 12, 13, 41, the decorative layers 12, 13, The pinholes 12c, 13c, 41c of 41 and the thin film thickness are unlikely to overlap each other. Therefore, compared to the touch panel device 10 of the first embodiment, the pinhole 12c and film thickness of the first decorative layer 12 It is possible to more reliably prevent light leakage from a thin portion of the plate.

<Third Embodiment>
As shown in FIG. 7, the touch panel device 50 of the third embodiment includes a panel material 11, a first decorative layer 12 (transparent portion 12a, opaque portion 12b, pinhole 12c), and a second decorative layer 13 (transparent portion). 13 a, opaque portion 13 b, pinhole 13 c), adhesive layer 14, and capacitance sensor sheet 15, and a light source LS is disposed on the back side of the touch panel device 40.

The touch panel device 50 is different from the touch panel device 10 of the first embodiment in that the arrangement positions of the second decorative layer 13 and the adhesive layer 14 are interchanged.
That is, the second decorative layer 13 is directly formed on the back surface side of the panel material 11, and the capacitance sensor sheet 15 is bonded and fixed to the second decorative layer 13 via the adhesive layer 14.

In order to manufacture the touch panel device 50, first, as in the first embodiment, the panel material 11 having the first decorative layer 12 formed on the surface side is prepared.
Next, the 2nd decorating layer 13 is printed on the back surface side of the panel material 11 in which the 1st decorating layer 12 was formed in the surface side using various printing methods.
The touch panel device 50 can be easily manufactured by sticking and fixing the capacitance sensor sheet 15 to the second decorative layer 13 via the adhesive layer 14.

In the touch panel device 50 of the third embodiment, the second decorative layer 13 is printed and formed directly on the back surface side of the panel material 11, but only the portion of the panel material 11 that faces the capacitance sensor sheet 15. The 2nd decoration layer 13 should just be formed.
Therefore, the area of the 2nd decoration layer 13 becomes small compared with the 1st decoration layer 12, and since the 2nd decoration layer 13 becomes difficult to receive to the influence of the shaping | molding distortion of the panel material 11, it is the 2nd decoration. It is easy to accurately position and form the surface design composed of the transparent portion 13a and the opaque portion 13b of the layer 13, and the positioning accuracy between the second decorative layer 13 and the capacitance sensor sheet 15 can be increased. it can.
Accordingly, the touch panel device 50 according to the third embodiment can obtain the same operations and effects as those of the first embodiment.

<Another embodiment>
The present invention is not limited to the above-described embodiments, and may be embodied as follows. Even in this case, operations and effects equivalent to or higher than those of the above-described embodiments can be obtained.

  [1] The panel material 11 is not limited to a synthetic resin material, and may be formed of a glass material.

  [2] Each of the above embodiments is applied to the touch panel devices 10, 40, and 50 used for the instrument cluster panel of the automobile. However, the present invention is not limited to the instrument cluster panel, and any device ( For example, the present invention may be applied to a touch panel device installed in a car center console, an overhead console, a computer device, a household appliance, or the like.

  [3] The embodiments described above may be combined as appropriate, in which case the actions and effects of the combined embodiments can be combined or a synergistic effect can be obtained.

  The present invention is not limited to the description of each aspect and each embodiment. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims. The contents of publications and the like specified in the present specification are all incorporated by reference.

DESCRIPTION OF SYMBOLS 10, 40, 50 ... Touch panel apparatus 11 ... Panel material 12 ... 1st decoration layer 13 ... 2nd decoration layer 41 ... 3rd decoration layer 12a, 13a, 41a ... Transparent part 12b, 13b, 41b ... Opaque part 12c , 13c, 41c ... pinhole 14 ... adhesive layer 15 ... capacitance sensor sheet 20 ... center panel
LS ... Light source

Claims (7)

Panel material made of transparent material,
A first decorative layer formed on the surface side of the panel material;
A second decorative layer formed on the back side of the panel material;
A capacitance sensor sheet adhered and fixed to the back side of the panel material;
A touch panel device comprising: a third decorative layer formed on a surface opposite to the surface facing the panel material in the capacitance sensor sheet ;
Each decorative layer has a transparent portion and an opaque portion, and the transparent portion and the opaque portion of each decorative layer are formed in substantially the same size and shape in a plan view when the touch panel device is viewed from the surface side. The touch panel device is arranged so that the transparent portion and the opaque portion of each decorative layer overlap each other. The second decorative layer is directly formed on one surface side of the capacitance sensor sheet, and the second decorative layer is bonded and fixed to the back surface side of the panel material via an adhesive layer.
The touch panel device according to claim 1. The second decorative layer is directly formed on the back side of the panel material, and the capacitance sensor sheet is bonded and fixed to the second decorative layer via an adhesive layer.
The touch panel device according to claim 1. The panel material is formed of a synthetic resin material having a three-dimensional curved shape.
The touch panel device according to any one of claims 1 to 3 . It is a manufacturing method of the touch panel device according to claim 2,
Forming the first decorative layer on the surface side of the panel material;
Forming the second decorative layer on one side of the capacitance sensor sheet;
With respect to the back surface side of the panel material on which the first decorative layer is formed on the front surface side, the capacitance sensor sheet on which the second decorative layer is formed, and the second decorative layer on the panel A method of manufacturing a touch panel device, comprising: a step of arranging the second decorative layer so as to face the material, and attaching and fixing the second decorative layer to the back surface side of the panel material via the adhesive layer. It is a manufacturing method of the touch panel device according to claim 3,
Forming the first decorative layer on the surface side of the panel material;
Forming the second decorative layer on the back side of the panel material;
A method of manufacturing a touch panel device, comprising: a step of attaching and fixing the capacitance sensor sheet to the second decorative layer via the adhesive layer. It is a manufacturing method of the touch panel device according to claim 5 or 6 ,
A method for manufacturing a touch panel device, comprising a step of forming the second decorative layer by printing.

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