JP6785714B2 - Touch panel - Google Patents

Description

The present invention relates to a touch panel that detects a user's operation input.

A protective film may be attached to the surface of the touch panel that detects the user's operation input (the surface of the operation input receiving unit having the sensor) for the purpose of protecting the sensor that detects the operation input in the manufacturing process. As an example of such a protective film, for example, there is one described in Patent Document 1.

The protective sheet (an example of a protective film) described in Patent Document 1 forms a slit between a central region and a peripheral region surrounding the central region, and forms a slit in the peripheral region along a preset peeling direction. When the protective sheet is peeled off, it is configured so that it is caught by the surrounding area and the central area is not peeled off at the same time. In addition, a tab for peeling off the central region (an example of "peeling tape") is provided on the surface of the central region, and a notch is continuously formed from the slit in the vicinity of the tab in the central region. It is disclosed.

International Publication No. 2012/032899 Pamphlet

Here, a bezel may be provided in the peripheral area of the operation input receiving unit having the sensor. On the other hand, as described above, the touch panel is attached with a protective film via an adhesive layer for the purpose of protection, and is conveyed to the bezel attachment step with the protective film attached. This protective film is peeled off after the touch panel is completed (after assembly) or after the product is installed using the touch panel. However, when the protective sheet described in Patent Document 1 is used for this protective film, the protective film is used as an operation input receiving unit. It is adsorbed on. If a release tape is provided at the end of the protective film, the release tape may protrude into the peripheral area of the operation input reception unit during the bezel mounting process and may be pinched between the protective film and the edge of the protective film. It is difficult to provide a release tape on the part. Further, when the release tape is provided at a position away from the end of the protective film, air cannot be introduced between the operation input receiving portion and the protective film at the end of the protective film, so that a large force is applied at the time of release. In short, it becomes difficult to peel off easily and surely. Further, even in a configuration in which the protective film is provided with a notch that triggers peeling, there is a problem that when the protective film is peeled off by holding the release tape, the notch is subjected to force and the protective film is torn, which makes it easy and easy. , It becomes difficult to peel off reliably.

Therefore, there is a demand for a touch panel protected by a protective sheet that can be easily and surely peeled off.

The characteristic configuration of the touch panel according to the present invention is a touch panel for detecting a user's operation input, in which an operation input receiving unit having a sensor for detecting the operation input and at least a central region of the operation input receiving unit are exposed. The bezel provided around the central region, the protective film attached via the adhesive layer so as to cover the central region, and the adhesive layer among the surfaces of the protective film were provided. A sticking portion to be attached to a surface opposite to the surface via an adhesive portion, and a release tape having an extending portion swingably extending from the pasting portion to the protective film. In the protective film, when the protective film is viewed along the laminating direction in which the release tape and the protective film are laminated, the protective film and the pressure-sensitive adhesive layer are placed in a thickness direction in an area overlapping the release tape. The point is that a through hole is provided so as to penetrate along the above.

With such a characteristic configuration, a through hole can be provided in a region where the release tape in the protective film overlaps in a plan view, and an operation input reception is received by pulling the extending portion in a predetermined direction to lift the protective film. It is possible to allow air to enter between the portion and the protective film through a through hole. Since the adhesive force between the operation input receiving part and the protective film can be reduced by the ingress of air, the protective film can be easily and surely peeled off smoothly around the part where the air has entered. Become.

Further, it is preferable that the release tape is provided so that the entire region of the release tape overlaps with the protective film when viewed along the lamination direction.

With such a configuration, in the process of assembling the bezel to the operation input reception unit to which the protective film is attached, it is possible to prevent the extension portion of the release tape from being sandwiched between the operation input reception unit and the bezel.

Further, it is preferable that the through hole is provided at a position overlapping both the sticking portion and the extending portion of the protective film when the release tape is viewed along the laminating direction.

With such a configuration, through holes can be provided in the overlapping regions in a plan view on both the adhesive portion of the release tape in the protective film and the extension portion that serves as the handle portion when the release tape is peeled off. When the extension portion is pulled in a predetermined direction, air can be reliably introduced between the operation input reception portion and the protective film. Therefore, the protective sheet can be easily and surely peeled off.

Further, the through hole is preferably a slit-shaped linear shape when viewed along the stacking direction.

With such a configuration, it is possible to easily process the through hole.

Alternatively, the through hole may be circular or elliptical when viewed along the stacking direction.

When the extending portion of the release tape is pulled in a predetermined direction, for example, when the through hole is polygonal, the protective film may be torn starting from the corner of the polygon depending on the pulling direction. Therefore, with such a configuration, since the corners can be eliminated in the through holes, it is possible to prevent the protective film from tearing.

Further, it is preferable that a plurality of the through holes are provided.

With such a configuration, even if the release tape is attached to the protective film via the adhesive portion, even if the position is displaced, one of the through holes is a laminate in which the release tape and the protective film are laminated. When the protective film is viewed along the direction, the protective film and the adhesive layer can be penetrated along the thickness direction into the area overlapping the release tape. Therefore, it is possible to secure a margin of misalignment when the release tape is attached to the protective film.

Further, it is preferable that the protective film is formed by using polyester.

With such a configuration, the strength of the protective film can be ensured, and the through holes can be easily machined.

It is a top view of the touch panel. It is sectional drawing of the line II-II of FIG. It is a partially enlarged view of the protective film provided with a through hole. It is sectional drawing of the touch panel of another embodiment. It is a figure which showed the through hole of another embodiment. It is a figure which showed the through hole of another embodiment. It is a figure which showed the through hole of another embodiment.

The touch panel according to the present invention is configured to be able to detect a user's operation input. The user's operation input is an input performed by the user by operating the touch panel. Hereinafter, the touch panel 100 of the present embodiment will be described.

FIG. 1 is a top view of the touch panel 100 of the present embodiment, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. As shown in FIGS. 1 and 2, the touch panel 100 includes an operation input receiving unit 10, a bezel 20, a protective film 30, and a release tape 40. In FIG. 2, the bottom side of the touch panel 100 is not shown.

The operation input receiving unit 10 has a sensor 11 for detecting the operation input. As described above, the user operates the touch panel 100 to input. The operation input receiving unit 10 is provided with a sensor 11 over the entire surface so that this operation can be received. The sensor 11 may be, for example, a capacitance type or a resistance film type. Of course, it may be in another format.

The bezel 20 is provided around the central region 12 with at least the central region 12 of the operation input receiving unit 10 exposed. The operation input receiving unit 10 can be divided into a central region 12 which is a central portion and an outer peripheral region 13 which surrounds the central region 12. Therefore, the periphery of the central region 12 corresponds to the outer peripheral region 13 in this embodiment. In this embodiment, the bezel 20 is provided so as to cover the outer peripheral region 13 as shown in FIG. As a result, the central region 12 is exposed to the bezel 20.

The protective film 30 is attached via the adhesive layer 31 so as to cover the central region 12. As described above, the operation input receiving unit 10 is in a state where the outer peripheral region 13 is covered with the bezel 20 and the central region 12 is exposed. The protective film 30 is provided with an adhesive layer 31 on one surface, and is attached to the central region 12 via the adhesive layer 31. It is preferable to form such a protective film 30 using, for example, polyester.

The release tape 40 is attached to the surface of the protective film 30 on the side opposite to the surface provided with the adhesive layer 31 via the adhesive portion 43, and the protective film from the adhesive portion 41. It has an extension portion 42 that extends swingably with respect to 30. Of the surfaces of the protective film 30, the surface provided with the adhesive layer 31 is the surface of the protective film 30 facing the operation input receiving unit 10. Therefore, among the surfaces of the protective film 30, the surface opposite to the surface provided with the adhesive layer 31 corresponds to the back surface of the surface of the protective film 30 facing the operation input receiving unit 10. On the release tape 40, the sticking portion 41 is attached to such a surface (back surface) via the adhesive portion 43.

Here, as shown in FIG. 2, only the sticking portion 41 of the release tape 40 is stuck to the protective film 30 via the adhesive portion 43. Therefore, the extending portion 42 is not attached to the protective film 30, but extends from the attaching portion 41 so that it can swing. Here, in the present embodiment, "to be able to swing" means that the extending portion 42 can be bent at a predetermined position (the side view has a bow shape).

In the present embodiment, the release tape 40 is provided so that the entire region of the release tape 40 overlaps with the protective film 30 when viewed along the stacking direction in which the release tape 40 and the protective film 30 are laminated. The case where the release tape 40 and the protective film 30 are laminated in the laminating direction corresponds to the case where the release tape 40 and the protective film 30 are viewed from the upper surface of the touch panel 100 as shown in FIG. 1 in the present embodiment. When the release tape 40 overlaps the entire area of the protective film 30 and the release tape 40, the release tape 40 in a state where the extension portion 42 is extended from the sticking portion 41 is not covered with, for example, the bezel 20. Means to be located on top. Therefore, the release tape 40 is provided on the protective film 30 with the sticking portion 41 and the extending portion 42 exposed.

Further, when the protective film 30 is viewed along the laminating direction, the protective film 30 has a through hole 50 that penetrates the protective film 30 and the adhesive layer 31 along the thickness direction in the region overlapping the release tape 40. Is provided. The area overlapping with the release tape 40 is an area of the protective film 30 where the release tape 40 (sticking portion 41 and extending portion 42) is provided. Penetrating the protective film 30 and the pressure-sensitive adhesive layer 31 along the thickness direction means penetrating each of the protective film 30 and the pressure-sensitive adhesive layer 31 from one surface of the surfaces facing each other to the other surface. In the present embodiment, the surface on which the release tape 40 is provided penetrates the surface facing the operation input receiving unit 10, and the portion of the operation input receiving unit 10 facing the through hole 50 passes through the through hole 50 to the outside air. Means to communicate with. The protective film 30 and the adhesive layer 31 are provided with through holes 50 along the thickness direction of the protective film 30 and the adhesive layer 31 in the region where the release tape 40 is provided.

In particular, in the present embodiment, the through hole 50 is provided at a position overlapping both the sticking portion 41 and the extending portion 42 of the protective film 30 when the release tape 40 is viewed along the laminating direction. That is, the through hole 50 is provided at a position directly below the laminating direction of both the sticking portion 41 and the extending portion 42 of the release tape 40 in the protective film 30. As a result, when the extension portion 42 is pulled upward at least to peel off the protective film 30, air is introduced between the protective film 30 and the adhesive layer 31 and the operation input receiving portion 10 at least through the through hole 50. It becomes easy to enter, and it becomes possible to easily peel off the protective film 30.

FIG. 3 shows an enlarged view of the through hole 50 of the present embodiment. As shown in FIG. 3, in the present embodiment, the through hole 50 is formed of a slit-shaped linear shape when viewed along the stacking direction. In this case, if the linear longitudinal direction is provided along the alignment direction of the sticking portion 41 and the extending portion 42 of the peeling tape 40, the protective film 30 and the adhesive layer 31 are operated and input when the peeling tape 40 is peeled off. This is suitable because air can easily enter between the reception unit 10 and the reception unit 10.

Further, as shown in FIG. 3, it is preferable to provide a plurality of through holes 50. As a result, even if the release tape 40 is attached to the protective film 30 via the adhesive portion 43 and is displaced, one of the through holes 50 is directly below the release tape 40 in the protective film 30. At the position, the protective film 30 and the adhesive layer 31 can be penetrated along the thickness direction. Therefore, it is possible to secure a margin of misalignment when the release tape 40 is attached to the protective film 30.

[Other Embodiments]
In the above embodiment, it has been described that the bezel 20 is provided around the central region 12 with at least the central region 12 of the operation input receiving unit 10 exposed. However, as shown in FIG. 4, the bezel 20 receives the operation input. It is also possible to provide the portion 10 so as to surround the outer peripheral portion 14. Even with such a configuration, the bezel 20 can have the central region 12 of the operation input receiving unit 10 exposed.

In the above embodiment, it has been described that the release tape 40 is provided so that the entire region of the release tape 40 overlaps with the protective film 30 when viewed along the laminating direction of the release tape 40 and the protective film 30. The release tape 40 can be provided so that the entire region of the release tape 40 does not overlap with the protective film 30 when viewed along the laminating direction of the release tape 40 and the protective film 30.

In the above embodiment, the through hole 50 overlaps with both the sticking portion 41 and the extending portion 42 of the protective film 30 when the release tape 40 is viewed along the laminating direction of the release tape 40 and the protective film 30. Although described as being provided at a position, the through hole 50 can be provided at a position overlapping one of the sticking portion 41 and the extending portion 42 of the protective film 30 when the release tape 40 is viewed in the laminating direction. ..

In the above embodiment, the through hole 50 has been described as being linear in a slit shape when viewed along the laminating direction of the release tape 40 and the protective film 30, but the through hole 50 is shown in FIG. As described above, it is also possible to form a circular shape when viewed along the laminating direction of the release tape 40 and the protective film 30. Further, although not shown, it can be configured in an elliptical shape.

In the above embodiment, it has been described that a plurality of through holes 50 are provided, but it is also possible to form a single slit-shaped linear shape as shown in FIG. 6, for example, as shown in FIG. It is also possible to configure it with a single ellipse. Further, although not shown, it is also possible to form a single circle.

In the above embodiment, the protective film 30 has been described as being formed using polyester, but the protective film 30 can also be formed using a material other than polyester.

Although the touch panel has been described in the above embodiment, the liquid display device having the bezel 20 provided around the central region 12 of the display unit with the protective film 30 and the release tape 40 exposed at least. It can also be used for other information display devices such as electroluminescence and electroluminescence.

The present invention can be used for a touch panel that detects a user's operation input.

10: Operation input reception part 11: Sensor 12: Central area 20: Bezel 30: Protective film 31: Adhesive layer 40: Release tape 41: Sticking part 42: Extension part 50: Through hole 100: Touch panel

Claims (7)

A touch panel that detects user operation input
An operation input receiving unit having a sensor for detecting the operation input,
A bezel provided around the central area with at least the central area of the operation input receiving unit exposed.
A protective film attached via an adhesive layer so as to cover the central region,
Of the surfaces of the protective film, a sticking portion to be attached to the surface opposite to the surface on which the adhesive layer is provided via an adhesive portion, and the sticking portion can swing with respect to the protective film. With a release tape having an extension that extends to
When the protective film is viewed along the laminating direction in which the release tape and the protective film are laminated, the protective film has a thickness of the protective film and the pressure-sensitive adhesive layer in an area overlapping the release tape. A touch panel provided with a through hole that penetrates along the direction. The touch panel according to claim 1, wherein the release tape is provided so that the entire region of the release tape overlaps with the protective film when viewed along the stacking direction. The first or second aspect of the present invention, wherein the through hole is provided at a position overlapping both the sticking portion and the extending portion of the protective film when the release tape is viewed along the laminating direction. Touch panel. The touch panel according to any one of claims 1 to 3, wherein the through hole is a slit-shaped linear shape when viewed along the stacking direction. The touch panel according to any one of claims 1 to 3, wherein the through hole is circular or elliptical when viewed along the stacking direction. The touch panel according to any one of claims 1 to 5, wherein a plurality of through holes are provided. The touch panel according to any one of claims 1 to 6, wherein the protective film is formed by using polyester.

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