JP2003150316A - Mounting structure for re-peelable transparent touch panel and mounting sheet used for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide mounting structure of a transparent touch panel by which no gel sheet is transferred and separated in repair and re-peeling with satisfactory yield is enabled even when the gel sheet is punched out with the respective transparent panels after providing the gel sheet on the rear surface of a large panel formed by taking many transparent touch panels. SOLUTION: A transparent mounting sheet (2) comprising an acrylic adhesive layer (6) laminated on one surface of a core material (4) of a plastic film and a silicone rubber sheet (7) laminated on a primer treated surface (5) formed by being primer-treated on the other surface is bonded to the entire rear surface of a transparent touch panel (1) by means of the acrylic adhesive layer and the transparent touch panel provided with the mounting sheet is mounted on the surface of a display (3).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remountable transparent touch panel mounting structure in which a transparent touch panel is removably mounted on a display, and a mounting sheet used therefor.

[0002]

2. Description of the Related Art A transparent touch panel 1 comprises an upper electrode 1 made of a transparent conductive film on the lower surface of a film-shaped upper insulating substrate 1a.
an upper electrode plate having b formed thereon and a lower electrode plate having a lower electrode 1d made of a transparent conductive film formed on the upper surface of a plate-shaped or film-shaped lower insulating substrate 1c, and the upper electrode plate and the lower electrode plate. Is a structure in which electrodes are opposed to each other via an air layer between electrodes, such as a cordless phone, a mobile phone, a calculator, a sub-notebook computer, a PDA (personal digital assistant), a digital camera, a video camera, and a commercial communication device. It is widely used as an input device mounted on a monitor of a portable electronic device or a personal computer including the display 3. The input method is C
RT (Cathod Ray Tube) and LCD (Liquid Crystal Di)
splay), organic ELD (Electro Luminescence Displa)
y) etc. Transparent touch panel 1 on the surface of display 3
After mounting, various operations are performed by pressing the surface of the transparent touch panel 1 with a pen or a finger while seeing through the display surface of the display 3. A conventionally well-known mounting structure of a transparent touch panel is a transparent touch panel 1 in which a transparent adhesive layer such as an acrylic adhesive layer 6 is provided on the entire back surface as shown in Japanese Patent Laid-Open No. 61-131314. It is mounted on the surface of the display 3 (see FIG. 5).

However, in the case of the above structure, the transparent touch panel 1 is peeled off and re-mounted due to reasons such as dust contamination and positional displacement when the transparent touch panel 1 is mounted on the display 3 (hereinafter, this is referred to as " It was called "repair.") That is, when the transparent touch panel 1 is peeled off, the transparent pressure-sensitive adhesive layer 6 is equally firmly adhered to both the transparent touch panel 1 side and the display 3 side, so that the transparent pressure-sensitive adhesive layer 6 separates in the layer. It may be left on the transparent touch panel 1 side and the display 3 side, or a part of the transparent adhesive layer 6 may be stretched to make the film thickness non-uniform, which makes repairing difficult. Or it was impossible.

Therefore, as a solution to these problems, there is a means (see FIG. 3) for mounting the transparent touch panel 1 on the entire surface of the back surface of which the transparent polymer adhesive is formed in the form of a gel sheet and provided on the surface of the display 3. It has been newly devised and is disclosed in Japanese Patent Laid-Open No. 10-222305. Since this gel sheet 8 is usually uniform in thickness, it has good wettability with the adherend, and the transparent touch panel 1 and the display 3
Bubbles are less likely to occur when pasting. Further, the gel sheet 8 is strong against the pulling force acting in the vertical direction with respect to the sheet surface of the gel sheet 8 and the lateral shifting force along the sheet surface, and it is easy to exert the pulling force pulling it away from the end. Since the transparent touch panel 1 has a feature of being separated from the adherend, the transparent touch panel 1 does not have to be peeled off in a normal use state after mounting, and the transparent touch panel 1 can be easily peeled off at the time of repair.

[0005]

However, the mounting structure of the transparent touch panel using the gel sheet 8 still has the following problems.

That is, since both the surface of the transparent touch panel 1 side and the surface of the display 3 side of the gel sheet 8 are easily peeled off, which side of the transparent touch panel 1 side or the display 3 side the gel sheet 8 remains during repair. I can't control it. Therefore, the gel sheet 8 provided on the back surface of the transparent touch panel 1 before mounting is the transparent touch panel 1
May be transferred to the display 3 side when peeled off (see FIG. 4), and in this case, only the gel sheet 8 has to be peeled off from the display 3 in order to achieve repair. This is troublesome, and the gel sheet 8 itself is deformed when only the gel sheet 8 is peeled off, which makes reuse of the gel sheet 8 difficult.

When left in a high temperature environment for a long time,
When the transparent touch panel 1 is peeled off, the gel sheet 8 is separated in the layer and remains on the transparent touch panel 1 side and the display 3 side as in the case of mounting with the transparent adhesive layer 6 in FIG.

Further, since the gel sheet 8 does not have a core material, each transparent touch panel 1 is provided after the gel sheet 8 is provided on the back surface of a large-sized panel in which a large number of transparent touch panels 1 are taken.
When punching together with the gel sheet, it is difficult to punch into a predetermined shape with high precision due to the weakness of the waist.
Since it is not adhered to the transparent touch panel 1, the gel sheet 8 may stick out from the periphery of each transparent touch panel 1 obtained by punching. That is, the yield is poor.

Therefore, an object of the present invention is to solve the above-mentioned problems, and the gel sheet is not transferred or separated at the time of repair, and a large-sized panel rear surface having a large number of transparent touch panels is taken. It is an object of the present invention to provide a mounting structure of a transparent touch panel that can be re-peeled with a good yield even when it is punched together with each transparent touch panel after the gel sheet is provided, and a mounting sheet used for this.

[0010]

In order to achieve the above object, the present invention is configured as follows. According to the first aspect of the present invention, a core material of a plastic film and an acrylic pressure-sensitive adhesive layer that is laminated on one surface of the core material and constitutes either the transparent touch panel side adhesive surface or the display side adhesive surface. And a primer-treated surface formed by subjecting the other side of the core material to a primer treatment, and one of the transparent touch panel-side adhesive surface and the display-side adhesive surface laminated on the primer-treated surface. A transparent mounting sheet is configured with a silicone rubber sheet configured as a removable surface, the transparent touch panel side adhesive surface of the mounting sheet is adhered to the back surface of the transparent touch panel, and the mounting sheet The display side adhesive surface is adhered to the display surface, and the transparent touch panel is removably mounted on the display surface. Providing a mounting structure of a re-peelable transparent touch panel.

According to a second aspect of the present invention, there is provided a remountable transparent touch panel mounting structure according to the first aspect, wherein the silicone rubber sheet has a thickness of 20 to 100 μm.

According to a third aspect of the present invention, there is provided a remountable transparent touch panel mounting structure according to the first or second aspect, wherein the core material has a thickness of 12 μm or more.

According to a fourth aspect of the present invention, there is provided a remountable transparent touch panel mounting structure according to the first or second aspect, wherein the acrylic pressure-sensitive adhesive layer has a thickness of 10 to 50 μm.

According to a fifth aspect of the present invention, the transparent touch panel side adhesive surface is adhered to the back surface of the transparent touch panel, and the display side adhesive surface is adhered to the display surface, and the transparent touch panel is adhered to the display surface. A releasably mounted sheet for mounting on a transparent touch panel, comprising a core material of a plastic film and one of the transparent touch panel side adhesive surface and the display side adhesive surface laminated on one surface of the core material. An acrylic pressure-sensitive adhesive layer constituting one side, a primer-treated surface formed by subjecting the other surface of the core material to a primer treatment, and the transparent touch panel-side adhesive surface laminated on the primer-treated surface and the above-mentioned. A silicone rubber sheet, which constitutes the other of the adhesive surfaces on the display side as a removable surface. Possible to provide a sheet for the transparent touch panel implementation.

According to a sixth aspect of the present invention, there is provided a removable transparent touch panel mounting sheet according to the fifth aspect, wherein the silicone rubber sheet has a thickness of 20 to 100 μm.

According to a seventh aspect of the present invention, there is provided a re-peelable transparent touch panel mounting sheet according to the fifth or sixth aspect, wherein the core material has a thickness of 12 μm or more.

According to an eighth aspect of the present invention, there is provided a removable transparent touch panel mounting sheet according to the fifth or sixth aspect, wherein the acrylic pressure-sensitive adhesive layer has a thickness of 10 to 50 μm.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The first and second embodiments of the present invention will be described in detail below with reference to the drawings.

(First and Second Embodiments) FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a mounting structure of the re-detachable transparent touch panel according to the embodiment, and FIG. 2 is a cross-sectional view showing a mounting structure of the re-detachable transparent touch panel according to the first embodiment of the present invention. In the figure, 1 is a transparent touch panel, 2 is a mounting sheet, 3 is a display, 4 is a transparent core material, 5 is a primer-treated surface of the core material 4, and 6 is an acrylic pressure-sensitive adhesive layer constituting an adhesive surface on the transparent touch panel side. , 7 are silicone rubber sheets constituting the adhesive surface on the display side, respectively.

The transparent touch panel 1 includes an upper electrode plate 1e having an upper electrode 1b formed of a transparent conductive film on the lower surface of a film-shaped upper insulating substrate 1a, and a plate-shaped or film-shaped lower insulating substrate 1c. A lower electrode plate 1f having a lower electrode 1d formed of a transparent conductive film on the upper surface thereof is provided, and the upper electrode plate 1e and the lower electrode plate 1f are opposed to each other with the air layer 1g interposed between the electrodes 1b and 1d. Is configured. 1h is a dot spacer, 1i is a spacer / adhesive layer

The display 3 is a cordless telephone, a mobile telephone, a calculator, a sub-notebook computer, a PDA.
(Personal Digital Assistant), digital camera, video camera, display of portable electronic equipment such as communication equipment for business use, monitor of personal computer and the like, display of input device of electronic equipment (more specifically, CRT and LCD) , A display such as an organic ELD). After mounting the transparent touch panel 1 on the surface of the display 3, the upper electrode 1b and the lower electrode 1d are brought into contact with each other by pressing the surface of the transparent touch panel 1 with a pen or a finger while seeing through the display surface of the display 3. Then, various input operations as an input device are performed.

In the mounting structure of the re-detachable transparent touch panel according to the first embodiment shown in FIG. 1, an acrylic pressure-sensitive adhesive layer 6 is laminated on one surface of a plastic film to be the core material 4, and the other surface thereof is laminated. A primer-treated surface 5 is formed by applying a primer treatment, a silicone rubber sheet 7 is laminated on the primer-treated surface 5, and a transparent mounting sheet 2 is formed on the back surface of the transparent touch panel 1 by the acrylic adhesive layer 6. (In other words, in this embodiment, in other words, the mounting sheet 2 is provided so as to be entirely adhered to the surface on the display side) so that the silicone rubber sheet 7 of the mounting sheet 2 contacts the entire surface of the display 3. The transparent touch panel 1 is mounted on the surface of the display 3. The total thickness of the mounting sheet 2 is
From the viewpoint of making the input device thinner, 100 μm or less is preferable.
The mounting sheet 2 is not limited to the one entirely adhered to the back surface of the transparent touch panel 1 by the acrylic pressure-sensitive adhesive layer 6, but may be partially adhered to the back surface of the transparent touch panel 1.

The plastic film serving as the core material 4 of the mounting sheet 2 supports the acrylic pressure-sensitive adhesive layer 6 and the silicone rubber sheet 7, and also has a large-sized panel (for example, a large number of transparent touch panels 1). , 50
0 mm x 500 mm panel, 100 mm x 10
When the transparent sheet 1 is punched together with each of the transparent touch panels 1 after the mounting sheet 2 is provided on the back surface of a panel capable of punching 25 0 mm transparent touch panels 1), each transparent touch panel 1 is strengthened. At the same time, the mounting sheet 2 can be punched into a predetermined shape with high precision. Further, by having the primer-treated surface 5 on the other surface of the plastic film 4, it is firmly adhered to the silicone rubber sheet 7,
This makes it possible to prevent the silicone rubber sheet 7 of the mounting sheet 2 from protruding from the periphery of each transparent touch panel 1 obtained by punching. The core material 4 is excellent in transparency so as not to deteriorate the visibility of the display 3, and has a total light transmittance of 88% or more (JIS-K7105-1981) and a haze value of 3% or less (JIS. -K7105-1981) is preferred. Further, as the core material 4 having excellent punching property, tensile strength (JIS-K7127-
(1989) is preferably 50% or more, and those satisfying both are transparent and optical such as PET (polyethylene terephthalate), PC (polycarbonate), TAC (triacetyl cellulose), PES (polyester sulfone). A film having an isotropic property can be used.

The thickness of the plastic film used as the core material 4 is preferably 12 μm or more. 12
If the thickness is less than μm, it is difficult to control the uniform thickness of the core material 4 when the coating film is formed. Therefore, the surface of the silicone rubber sheet 7 on the display side becomes uneven, and air is trapped when the transparent touch panel 1 is mounted. Tend to generate bubbles. If the thickness is less than 12 μm, the waist becomes weak.

The above-mentioned primer treatment generally means a treatment such as applying an intermediate agent having a good compatibility with the base material and the coating agent in order to improve the adhesion between them. In a broad sense, the term “easy-adhesion treatment” includes that the surface of the substrate is made uneven to increase the surface area to increase the adhesiveness, or the surface is modified by corona treatment or the like to improve the adhesiveness. In the mounting sheet 2 of the above-described embodiment of the present invention, the silicone rubber sheet 7 is firmly adhered to the core material 4 by this primer treatment, and when the transparent touch panel 1 is peeled off, the core material 4 and the silicone rubber sheet 7 are separated from each other. It is intended to prevent the silicone rubber sheet 7 from peeling off between the core material 4 and the silicone rubber sheet 7 from protruding due to a displacement between the core material 4 and the silicone rubber sheet 7 during the punching.

The acrylic pressure-sensitive adhesive layer 6 of the mounting sheet 2 is obtained by coating a pressure-sensitive adhesive that is generally used on a pressure-sensitive adhesive tape or the like, and the surface on which the acrylic pressure-sensitive adhesive layer 6 of the mounting sheet 2 is formed. Not only is it strong against the pulling force acting in the vertical direction and the lateral displacement force along the acrylic pressure-sensitive adhesive layer forming surface, but also the mounting sheet 2 and the acrylic pressure-sensitive adhesive are turned over from the end. The layer 6 has a strong adhesive force such that the mounting sheet 2 and the adherend are not easily separated even if a force for separating the adherend (the display 3 or the like) to which the mounting sheet 2 is adhered is exerted. .

The thickness of the acrylic pressure-sensitive adhesive layer 6 is preferably in the range of 10 to 50 μm. 10μ
If the thickness is less than m, the adhesive strength will be weak, and it will be difficult to control whether the mounting sheet 2 remains on the transparent touch panel 1 side or the display side during repair. On the other hand, when the thickness exceeds 50 μm, on the contrary, the adhesive force becomes too strong, and defoaming treatment is performed on bubbles generated or generated between the adherend and the adherend. Even if pressure is applied so that the bubbles are gradually expelled from the end, or if it is placed in a decompressed atmosphere, it becomes difficult for the bubbles to escape.

The silicone rubber sheet 7 of the mounting sheet 2 is separated from the adherend in a direction perpendicular to the silicone rubber sheet arrangement surface (primer-treated surface 5) and a lateral direction along the arrangement surface. It is strong in the power of deviation,
If a force for separating the mounting sheet 2 and the adherend to which the mounting sheet 2 is adhered by the silicone rubber sheet 7 is exerted so as to be turned over from the ends, the mounting sheet 2 and the adherend are easily separated. It is a thing. Therefore, as described above, since the adhesiveness of the mounting sheet 2 on the acrylic pressure-sensitive adhesive layer 6 side is strong, the mounting sheet 2 is easily peeled off on the surface on the silicone rubber sheet 7 side during repair. Further, even if the mounting sheet 2 is left in a high temperature environment for a long time, the mounting sheet 2 does not separate in the layer and remain on the transparent touch panel 1 side and the display 3 side during repair. As a material of the silicone rubber sheet 7, a silicone rubber sheet used as a shock absorber or the like can be used. Further, as the silicone rubber sheet 7, for example, a mixture obtained by converting a mixture of silicone rubber and silicone resin into an ink with a solvent and applying the mixture and crosslinking by heat during drying can be used.

The silicone rubber sheet 7 of the mounting sheet 2 does not lose its fixing force even if it is repeatedly attached and detached.

The thickness of the silicone rubber sheet 7 is preferably in the range of 20 to 100 μm. 10
If the thickness of the silicone rubber sheet 7 exceeds 0 μm, the adhesive strength becomes too strong, and when the transparent touch panel 1 is peeled off, the silicone rubber sheet 7 of the mounting sheet 2 is removed.
It becomes difficult to peel off on the side surface. If the thickness of the silicone rubber sheet 7 is less than 20 μm, even if the silicone rubber sheet 7 is adhered to an adherend such as the display 3, there is a place where it is lifted up without being adhered, which is excessive (that is, more than necessary).
It becomes easy to peel off. Therefore, when the thickness of the silicone rubber sheet 7 is 20 μm or more, a portion where the silicone rubber sheet 7 floats up when bonded is less likely to occur, the silicone rubber sheet 7 does not peel off excessively, and the silicone rubber sheet 7 has a high elasticity and serves as a shock absorbing material. The display 3 can be protected from impact and deformation.

Further, application during manufacturing of the mounting sheet 2, that is, application of a coating agent at the time of primer treatment, application of an acrylic adhesive when forming the acrylic adhesive layer 6, and formation of a silicone rubber sheet 7. For coating at this time, a general coating method such as a gravure coating method, a reverse coating method, a comma coating method, or a die coating method is used.

According to the first embodiment, the acrylic pressure-sensitive adhesive layer 6 is laminated on one surface of the core material 4 of the plastic film, and the other surface is subjected to primer treatment to form a primer-treated surface 5. A transparent mounting sheet 2 having a silicone rubber sheet 7 laminated thereon is entirely adhered to the back surface of the transparent touch panel 1 by the acrylic pressure-sensitive adhesive layer 6, and the silicone rubber sheet 7 is peeled off to the display 3 again. The transparent touch panel 1 provided with the above-mentioned mounting sheet 2 is attached to the display 3 so as to be adhered as much as possible.
It can be mounted on the entire surface of. Therefore, during repair, the mounting sheet 2 is usually neatly peeled off on the silicone rubber sheet 7 side, and the mounting sheet 2 is unlikely to be transferred or separated.

Even when the mounting sheet 2 is provided on the back surface of a large-sized panel in which a large number of transparent touch panels 1 are taken and then punched together with each transparent touch panel 1, the mounting sheet 2 mounts the core material 4. Since it is firmly adhered to the silicone rubber sheet 7, it can be punched into a predetermined shape with high accuracy, and the silicone rubber sheet 7 of the mounting sheet 2 is removed from the periphery of each transparent touch panel 1 obtained by punching. It can be suppressed so as not to overflow. Therefore, the yield is good.

Although the mounting structure of the first embodiment shown in FIG. 1 has been described above, the present invention is not limited to this and can be implemented in various other modes.

For example, as the mounting sheet according to the second embodiment of the present invention, the mounting sheet according to the first embodiment is arranged upside down in FIG. 1, and the silicone rubber sheet 7 is attached to the transparent touch panel side. In addition, the acrylic pressure-sensitive adhesive layer 6 is used as the display-side adhesive surface. That is, as shown in FIG. 2, the transparent mounting sheet 2 described above is wholly adhered to the surface of the display 3 by the acrylic adhesive layer 6, and the transparent mounting sheet 2 is attached to the surface of the mounting sheet 2 on the display 3. The transparent touch panel 1 may be mounted. The mounting sheet 2 is not limited to the one entirely adhered to the surface of the display 3 by the acrylic pressure-sensitive adhesive layer 6, but may be partially adhered to the surface of the display 3.

According to the second embodiment described above, the acrylic pressure-sensitive adhesive layer 6 is laminated on one surface of the core material 4 of the plastic film, and the primer treatment surface 5 is formed by applying the primer treatment to the other surface. A transparent mounting sheet 2 having a silicone rubber sheet 7 laminated thereon is entirely adhered to the back surface of the display 3 by the acrylic adhesive layer 6, and the silicone rubber sheet 7 is attached to the back surface of the transparent touch panel 1. The transparent touch panel 1 can be mounted on the entire surface of the display 3 provided with the mounting sheet 2 so as to be removably adhered. Therefore, during repair, the mounting sheet 2 is usually neatly peeled off on the silicone rubber sheet 7 side, and the mounting sheet 2 is unlikely to be transferred or separated.

[0037]

Example (Example 1 is an example relating to the first embodiment) A transparent polyester film having a thickness of 38 μm, a width of 1050 mm and a length of 500 mm was used as a core material, and one surface thereof was first subjected to a surface by corona discharge. After modification, a silicone rubber sheet having a thickness of 40 μm was laminated thereon with a coater, and a polyester film subjected to a mold release treatment was laminated on the surface as a separator. Then, an acrylic pressure-sensitive adhesive layer having a thickness of 30 μm was laminated on the other surface of the core material by a coater, and a polyester film subjected to a mold release treatment was laminated on the surface as a separator to provide a separator on both surfaces. A transparent mounting sheet was obtained.
After that, the above-mentioned sheet was peeled off from the separator on the acrylic pressure-sensitive adhesive layer side and attached to the entire back surface of a large-sized panel having a large number of transparent touch panels, and the width was 70 mm and the length was 90 mm.
Each transparent touch panel having a size of mm was punched with a blade die. Finally, after removing the remaining separator, a transparent touch panel was attached to the entire surface of the LCD.

Example 2 This is an example relating to the second embodiment. A mounting sheet with a separator having a width of 70 mm and a length of 90 mm was used, and the separator on the acrylic pressure-sensitive adhesive layer side was peeled off to form an LCD. After sticking on the entire surface, the remaining separator was peeled off, and the same procedure as in Example 1 was carried out except that the transparent touch panel was stuck on the separator.

COMPARATIVE EXAMPLE 1 A commercially available gel sheet having a transparent acrylic polymer adhesive in the form of a gel having a thickness of 200 μm and having separators on both sides was used. One of the separators was peeled off to obtain a large number of transparent touch panels. The same procedure as in Example 1 was carried out except that it was attached to the entire back surface of the panel.

(Comparative Example 2) A commercially available gel sheet having a transparent acrylic polymer pressure-sensitive adhesive in the form of gel having a thickness of 200 μm and having separators on both sides was used. One of the separators was peeled off and attached to the entire surface of the LCD. Except for this, the same procedure as in Example 2 was performed.

In both the mounting structures of Examples 1 and 2 and Comparative Examples 1 and 2, the transparent touch panel and the display are not peeled off in a normal use state, and they are peeled off so as to be turned over from the end when repairing. Then, the transparent touch panel and the display could be easily separated.
However, in Examples 1 and 2, the mounting sheet was always peeled off on the silicone rubber sheet side without being transferred, whereas in Comparative Examples 1 and 2, the gel sheet remains on either the transparent touch panel side or the display side. I can't control it, 10
The transparent touch panel side remained 4 times and the display side 6 times. In Comparative Examples 1 and 2, 70 ° C
When left in this environment for 24 hours, the gel sheet was separated in the layer and remained on the transparent touch panel side and the display side respectively.

Further, the mounting sheet of Example 1 was formed in conformity with the shape of the transparent touch panel, whereas the gel sheet of Comparative Example 1 was not conformed to the shape of the transparent touch panel.

Example 3 is another example relating to the first embodiment. Further, as another example, Example 3 of the mounting sheet according to the first embodiment of the present invention is shown in FIG. As shown, the icon sheet 20 is entirely bonded between the back surface of the transparent touch panel 1 and the mounting sheet 2 with an acrylic adhesive layer 26 of an acrylic adhesive. As shown in FIG. 6, the icon sheet 20 is a pattern sheet composed of a transparent part 20b and a pattern part 20a on which a fixed key forming part 20c is displayed, and is a screen on a transparent film such as PET (polyethylene terephthalate). It is preferable that a pattern including a fixed key is printed by printing or the like. The transparent touch panel 1 may include the icon sheet as part of its configuration.

Here, as the form of the icon sheet,
There are two types. For example, as shown in FIG. 8, one is an icon sheet 30 including only a pattern portion including a fixed key forming portion. The other is, for example, as shown in FIG. 6, an icon sheet 20 having a transparent portion in which a key can be freely changed by displaying an image in addition to a picture portion including a fixed key forming portion 20c. In the plan view of FIG. 6, both the fixed key forming portion 20c and the transparent portion 20b are plain, but the fixed key forming portion 20c is colored and included in the design portion.

As an implementation example 1 of the icon sheet 20,
As shown in FIG. 11, an icon sheet 20 having a transparent portion and a pattern portion on the back surface of the main constituent portion of the transparent touch panel 1.
, And the mounting sheet 2 is entirely adhered and fixed to the transparent touch panel 1 on the lower surface of the icon sheet 20 so that the display side adhesive surface of the mounting sheet 1 is re-attached to the surface of the display 3. It is arranged so that it can be peeled off.

As an implementation example 2 of the icon sheet 20,
As shown in FIG. 12, an icon sheet 20 having a transparent portion and a pattern portion on the back surface of the main constituent portion of the transparent touch panel 1.
, And the mounting sheet 2 is adhered and fixed to the transparent touch panel 1 on the lower surface of the transparent portion of the icon sheet 20 to be integrated, and the display side adhesive surface of the mounting sheet 2 is reattached to the surface of the display 3. It is arranged so that it can be peeled off.

As an implementation example 3 of the icon sheet 20,
As shown in FIG. 13, an icon sheet 20 having a transparent portion and a pattern portion on the back surface of the main constituent portion of the transparent touch panel 1.
And the mounting sheet 2 is disposed on the lower surface of the transparent portion of the icon sheet 20. The mounting sheet 2 is adhered and fixed to the surface of the display 3 to be integrated, and the adhesive surface of the mounting sheet 2 on the transparent touch panel side which is the silicone rubber sheet 7 is on the transparent touch panel 1 side, that is, on the icon sheet 20. It is arranged so that it can be peeled off again from the transparent portion.

Comparing the above mounting examples 1 to 3, there is almost no difference, but in the mounting example 1, bubbles may remain between the mounting sheet 2 and the transparent touch panel 1. The reason is that the icon sheet 20 has a pattern printed on a transparent film and is divided into a transparent part and a pattern part formed by printing the pattern. At this time, when a picture is printed on the upper surface of the transparent film, or when a picture is printed on the lower surface of the transparent film, there is a step between the printed part and the non-printed part. If it is covered with a sheet for air bubbles, air bubbles may remain in this part. On the other hand, in the mounting examples 2 and 3, the mounting sheet covers only the transparent portion, so that the step portion between the printed portion and the non-printed portion is not covered, and bubbles may remain in this portion. There is no nature.

Further, as shown in FIG. 8, the following mounting examples 4 to 6 can be cited as mounting examples including only the pattern portion including the first fixed key forming portion 20c.

As a fourth implementation example, as shown in FIG.
The icon sheet 30 is arranged on a part of the back surface of the main configuration of the transparent touch panel 1, and the mounting sheet 2 is adhesively fixed to the remaining part of the back surface of the main configuration of the transparent touch panel 1 and the back surface of the icon sheet 30. It is integrated.
Furthermore, the display-side adhesive surface on the back surface of the mounting sheet 2 is removably arranged on the front surface of the display 3.

Further, as a mounting example 5, as shown in FIGS. 9 and 15, an icon sheet 30 is arranged on a part of the back surface of the main configuration of the transparent touch panel 1, and the main configuration of the transparent touch panel 1 is further provided. The mounting sheet 2 is bonded and fixed to the remaining portion of the back surface of the unit to be integrated. Furthermore, the display-side adhesive surface on the back surface of the mounting sheet 2 is removably arranged on the front surface of the display 3. More specifically, as shown in FIG. 9, the mounting sheet 2 is arranged on most of the back surface of the transparent touch panel 1, and the icon sheet 30 is arranged on the remaining portion. That is, the acrylic adhesive layer 6 of the mounting sheet 2 is adhered to most of the back surface of the transparent touch panel 1, and the mounting sheet 2 is arranged. On the other hand, the icon sheet 30 is adhered to the remaining portion of the back surface of the transparent touch panel 1 with an acrylic adhesive layer 36 of an acrylic adhesive. The icon sheet 30 is the same as the icon sheet 20 of the third embodiment.

In Implementation Example 6, as shown in FIG. 16, the icon sheet 30 is arranged on a part of the back surface of the main configuration of the transparent touch panel 1, and the remaining part of the back surface of the main configuration of the transparent touch panel 1 is left. The mounting sheet 2 is removably arranged on the portion. Further, the display-side adhesive surface on the back surface of the mounting sheet 2 is adhesively fixed to and integrated with the surface of the display 3.

These mounting examples 4 to 6 are the same as the preceding mounting examples 1 to 3.
Compared with each other, in the mounting examples 5 and 6, since the icon sheet and the mounting sheet are provided in parallel, there is a possibility that a gap is formed between the icon sheet and the mounting sheet (in the lateral direction) to be conspicuous. There is. Further, in the mounting example 4, since a step is generated between the portion with the icon sheet and the portion without the icon sheet, air bubbles may remain between the mounting sheet and the transparent touch panel. Since this step is a step that is larger than the step between the printed portion and the non-printed portion, the remaining amount of bubbles is larger than that in the previous specific example. Therefore,
The mounting examples 1 to 3 are more preferable than the mounting examples 4 to 6.

The transparent portion 20b is an area in which the positions and functions of the keys can be freely changed by displaying the screen of the display 3. On the other hand, the fixed key forming unit 20c does not change the position and function of the key according to the display of the screen of the display 3, but always has a key having a certain function at a certain position and the upper electrode 1b and the lower electrode 1d. It is a region formed between and.

If the display is an LCD, FIG.
As shown in 0, a transparent buffer plate 54 may be entirely bonded by an acrylic adhesive layer 56 of an acrylic adhesive between the back surface of the transparent touch panel 1 and the mounting sheet 2. The buffer plate 54 may be mounted at an arbitrary position between the back surface of the transparent touch panel 1 and the front surface of the display 3. As the buffer plate 54, PC (polycarbonate), PMMA (polymethylmethacrylate), PE
A plastic sheet such as T (polyethylene terephthalate), MS (methacryl styrene copolymer) or glass is used. The purpose of inserting the buffer plate 54 is to reduce image bleeding that occurs when inputting with a pen or finger when the display 3 is an LCD.
The pressure at the time of input is dispersed, and the buffer function can be exerted by reducing the pressure applied to the LCD display 3. Therefore, the thickness of the buffer plate 54 is 0.2 m.
It is preferably about m to 2 mm. This is because if it is less than 0.2 mm, the effect of pressure dispersion is not obtained, and if it exceeds 2 mm, the visibility of the display 3 is deteriorated due to the parallax due to the thickness.

According to the above configuration, since the buffer plate 54 is inserted between the back surface of the transparent touch panel 1 and the mounting sheet 2, when the display 3 is an LCD, the pressure at the time of input with a pen or finger is applied. LC is dispersed by the buffer plate 54
The pressure applied to the D display 3 can be reduced,
It is possible to achieve an effect that it is possible to reduce image bleeding that occurs at the time of input.

As mounting examples including the buffer plate, the following mounting examples 7 to 10 can be given.

As a mounting example 7 of the buffer plate, as shown in FIGS. 10 and 17, a buffer plate 54 is entirely arranged on the back surface of the transparent touch panel 1 and is further mounted on the lower surface of the buffer plate 54 entirely. The sheet 2 is adhesively fixed and integrated, and the display-side adhesive surface of the mounting sheet 2 is removably arranged on the surface of the display 3.

As a mounting example 8 of the buffer plate, as shown in FIG. 18, a buffer plate 54 is entirely arranged on the back surface of the transparent touch panel 1, and the mounting sheet 2 is entirely covered on the lower surface of the buffer plate 54. The display-side adhesive surface of the mounting sheet 2 is arranged so as to be removable, and is integrally fixed to the surface of the display 3 by adhesion.

As a mounting example 9 of the cushioning plate, as shown in FIG. 19, the mounting sheet 2 is entirely adhered and fixed to the back surface of the transparent touch panel 1 to be integrated, and the entire lower surface of the mounting sheet 2 is further covered. The buffer plate 54 is disposed so as to be removable again, and the buffer plate 54 is integrally bonded and fixed to the surface of the display 3.

As a mounting example 10 of the buffer plate, as shown in FIG. 20, a mounting sheet 2 is provided on the back surface of the transparent touch panel 1.
Is entirely removably arranged, and the cushioning plate 54 is integrally adhered and fixed to the entire lower surface of the mounting sheet 2, and the cushioning plate 54 is integrally adhered and fixed to the surface of the display 3. ing.

[0062]

EFFECTS OF THE INVENTION The mounting structure of the removable transparent touch panel of the present invention and the mounting sheet used for the same have the above-mentioned constitutions, and therefore have the following effects.

That is, an acrylic pressure-sensitive adhesive layer is laminated on one surface of a core material of a plastic film, and a silicone rubber sheet is laminated on a primer-treated surface formed by subjecting the other surface to a primer treatment. A mounting sheet, which is wholly or partially adhered to the back surface of the transparent touch panel by the acrylic pressure-sensitive adhesive layer, and the transparent touch panel provided with the mounting sheet is mounted on the display surface, or the mounting sheet Was entirely or partially adhered to the display surface by the acrylic pressure-sensitive adhesive layer, and the transparent touch panel was mounted on the surface of the mounting sheet on the display. Therefore, the mounting sheet is usually on the silicone rubber sheet side during repair. Peels off neatly, and the mounting sheet is difficult to transfer or separate.

In addition, even when mounting a mounting sheet on the back surface of a large-sized panel in which a large number of transparent touch panels are taken and then punched out with each transparent touch panel,
Since the mounting sheet has a core material and is firmly adhered to the silicone rubber sheet, it can be punched into a predetermined shape with high precision, and the silicone of the mounting sheet can be punched from the periphery of each transparent touch panel obtained by punching. It is possible to prevent the rubber sheet from protruding. Therefore, the yield is good.

When the thickness of the silicone rubber sheet is 20 to 100 μm, the adhesive strength does not become too strong, and when the transparent touch panel is peeled off,
The surface of the mounting sheet on the side of the silicone rubber sheet can be easily peeled off, and the parts that do not float up when adhered to the adherend are less likely to peel off, and the silicone rubber sheet is highly elastic and also serves as a shock absorber. Therefore, the display can be protected from various impacts and deformations.

When the thickness of the core material is 12 μm or more, the rigidity of the core material becomes sufficiently strong, and the core material becomes corrugated when a coating film such as an acrylic pressure-sensitive adhesive layer is formed on the core material. A uniform thickness can be maintained without hitting, the surface on the silicone rubber sheet side can be prevented from becoming uneven, and air is not easily trapped during the mounting of the transparent touch panel to cause bubbles.

The thickness of the acrylic pressure-sensitive adhesive layer is 1
When the thickness is from 0 to 50 μm, the adhesive force is not weakened, and it becomes easy to control whether the mounting sheet remains on the transparent touch panel side or the display side during repair (in other words, the acrylic adhesive It becomes easier to control so that the mounting sheet always remains on the layer side), and on the contrary, the adhesive force does not become too strong, and the bubbles that are generated or have formed between the adherend and the defoaming process make it easier to remove the bubbles. .

By properly combining the arbitrary embodiments of the aforementioned various embodiments, the effects possessed by them can be produced. While the present invention has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. It is to be understood that such variations and modifications are included within the scope of the present invention as defined by the claims.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a mounting structure of a removable removable touch panel according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a mounting structure of a removable removable touch panel according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a mounting structure of a conventional re-detachable transparent touch panel.

FIG. 4 is a cross-sectional view showing a state where the transparent touch panel is peeled off after mounting with the structure of FIG.

FIG. 5 is a cross-sectional view showing a mounting structure of a conventional transparent touch panel.

FIG. 6 is a plan view showing an icon sheet forming a part of the transparent touch panel of the remountable transparent touch panel mounting structure according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a mounting structure of a removable removable touch panel and an icon sheet according to the first embodiment of the present invention.

FIG. 8 is a plan view showing an icon sheet forming a part of the transparent touch panel of the mounting structure of the removable removable touch panel according to the first embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a mounting structure of a removable removable touch panel and an icon sheet according to the first embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a mounting structure of a removable removable touch panel and a buffer plate according to the first embodiment of the present invention.

FIG. 11 is a schematic explanatory diagram of a mounting structure of the removable removable touch panel and a mounting example 1 of an icon sheet according to the above embodiment.

FIG. 12 is a schematic explanatory view of a mounting structure of a re-separable transparent touch panel and an icon sheet mounting example 2 according to the embodiment.

FIG. 13 is a schematic explanatory diagram of a mounting structure of a removable removable touch panel and an icon sheet mounting example 3 according to the embodiment.

FIG. 14 is a schematic explanatory diagram of a mounting structure of a re-separable transparent touch panel and an icon sheet mounting example 4 according to the embodiment.

FIG. 15 is a schematic explanatory diagram of a mounting structure of a removable removable touch panel and an icon sheet mounting example 5 according to the embodiment.

FIG. 16 is a schematic explanatory view of a mounting structure of a re-separable transparent touch panel and an icon sheet mounting example 6 according to the embodiment.

FIG. 17 is a schematic explanatory view of a mounting structure of a removable removable touch panel and a mounting example 7 of a buffer plate according to the above embodiment.

FIG. 18 is a schematic explanatory view of a mounting structure of a removable removable touch panel and a mounting example 8 of a buffer plate according to the above embodiment.

FIG. 19 is a schematic explanatory diagram of a mounting structure of a removable removable touch panel and a mounting example 9 of a buffer plate according to the embodiment.

FIG. 20 is a schematic explanatory view of a mounting structure of a removable removable touch panel and a mounting example 10 of a buffer plate according to the above embodiment.

[Explanation of symbols]

1 transparent touch panel 1a Upper insulating substrate 1b Upper electrode 1c Lower insulating substrate 1d lower electrode 1e Upper electrode plate 1f Lower electrode plate 1g air layer 1h dot spacer 1i Spacer and adhesive layer 2 Mounting sheet 3 display 4 core material 5 Primer treated surface 6 Acrylic adhesive layer 7 Silicone rubber sheet 8 gel sheet 20 icon sheet 20a picture part 20b transparent part 20c Fixed key forming part 26 Acrylic adhesive layer 30 icon sheet 36 Acrylic adhesive layer 54 buffer plate 56 Acrylic adhesive layer

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 4F100 AK01A AK25G AK41 AK52B                       AN02B BA02 BA07 BA15                       EJ65A GB41 JL14 YY00A                       YY00B YY00G                 5B068 AA01 AA22 AA33 BB06 BC07                 5B087 AA00 CC12 CC14 CC37

Claims (8)

[Claims] 1. A core material of a plastic film, an acrylic pressure-sensitive adhesive layer which is laminated on one surface of the core material and constitutes one of a transparent touch panel side adhesive surface and a display side adhesive surface, and the core material. Of the other side of the primer-treated surface formed by applying a primer treatment, and a surface which is laminated on the primer-treated surface and is capable of re-peeling one of the transparent touch panel side adhesive surface and the display side adhesive surface. A transparent mounting sheet is configured with a silicone rubber sheet configured as, and the transparent touch panel side adhesive surface of the mounting sheet is
Adhesive to the back surface of the transparent touch panel, the display-side adhesive surface of the mounting sheet is adhered to the display surface, and the transparent touch panel is removably mounted on the surface of the display. Mounting structure of transparent touch panel. 2. The thickness of the silicone rubber sheet is 20.
The mounting structure of the re-detachable transparent touch panel according to claim 1, which has a thickness of ˜100 μm. 3. The mounting structure of a re-detachable transparent touch panel according to claim 1, wherein the thickness of the core material is 12 μm or more. 4. The acrylic pressure-sensitive adhesive layer has a thickness of 10 to 10.
The mounting structure of the re-detachable transparent touch panel according to claim 1, which has a thickness of 50 μm. 5. The transparent touch panel side adhesive surface is adhered to the back surface of the transparent touch panel, and the display side adhesive surface is adhered to the display surface, so that the transparent touch panel is removably mounted on the display surface. A sheet for mounting a transparent touch panel, comprising a core material of a plastic film, and an acrylic pressure-sensitive adhesive that is laminated on one surface of the core material to form one of the transparent touch panel side adhesive surface and the display side adhesive surface. A layer, a primer-treated surface formed by subjecting the other surface of the core material to a primer treatment, and one of the transparent touch panel-side adhesive surface and the display-side adhesive surface laminated on the primer-treated surface And a silicone rubber sheet configured as a removable surface. Akira touch panel for mounting the seat. 6. The silicone rubber sheet has a thickness of 20.
The releasable sheet for mounting a transparent touch panel according to claim 5, wherein the sheet has a thickness of ˜100 μm. 7. The removable transparent touch panel mounting sheet according to claim 5, wherein the core material has a thickness of 12 μm or more. 8. The thickness of the acrylic pressure-sensitive adhesive layer is 10 to 10.
The releasable transparent touch panel mounting sheet according to claim 5, which has a thickness of 50 μm.