JP2014002666A - Touch panel device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deflection caused by size increase, and suppress decrease in detection sensitivity.SOLUTION: A touch panel device 1 includes a transparent substrate 21, a touch panel 11 having a sensor pattern layer 22 formed on one face of the transparent substrate 21, and a protection panel 12 bonded, with a transparent adhesive layer 13, to a face of the touch panel 11 on the sensor pattern layer 22 side.

Description

  The present invention relates to a touch panel device disposed on the front surface of a display device, for example.

  2. Description of the Related Art Conventionally, touch panel devices are frequently used as input devices for portable terminal devices and display devices. In the electro-optical device described in Patent Document 1, an input panel, which is a transparent touch panel, is disposed on an electro-optical panel made of, for example, a liquid crystal panel via a transparent adhesive.

  An input panel, that is, a touch panel, has two transparent substrates made of glass, synthetic resin, or the like arranged opposite to each other with a frame-shaped sealing material, and is formed of a transparent conductive film or a plurality of electrodes inside the frame-shaped sealing member. An input area is provided.

  In the display device with a touch panel described in Patent Document 2, a touch panel is disposed on the liquid crystal panel via an adhesive layer, and a front panel is disposed on the touch panel via the adhesive layer. . It is described that the front panel is appropriately arranged.

JP 2010-224380 A (released on October 7, 2010) JP 2011-191608 A (released on September 29, 2011)

  As described in Patent Document 1, in the touch panel, the upper surface of the transparent substrate is a touch surface, and an input region exists on the lower surface of the transparent substrate. This configuration is shown in FIG. FIG. 7 is a longitudinal sectional view showing an example of a conventional touch panel.

  As shown in FIG. 7, a conventional touch panel 101 includes a transparent substrate 111 made of glass, for example, and an input region, that is, a sensor pattern layer 112 is provided on the back surface thereof. The surface of the transparent substrate 111 opposite to the surface on which the sensor pattern layer 112 is formed is a touch surface 101a.

  Here, when the display panel such as a liquid crystal panel on which the touch panel 101 is arranged is enlarged, and the touch panel 101 is enlarged accordingly, the thickness of the transparent substrate 111 is about 0.7 mm, for example, the touch panel 101. It becomes easy to bend.

  In view of this, as a countermeasure for preventing deflection associated with an increase in the size of the touch panel 101, it is conceivable to dispose a front panel, that is, a protective panel, further on the front surface of the transparent substrate 111 of the touch panel 101 as shown in Patent Document 2. In this case, the front surface of the protection panel is the touch surface 101a.

  However, in such a configuration, since the protective panel and the transparent substrate 111 exist between the touch surface 101a and the sensor pattern layer 112, the distance from the touch surface 101a to the sensor pattern layer 112 becomes long. As a result, the detection sensitivity in the sensor pattern layer 112 is lowered.

  Accordingly, an object of the present invention is to provide a touch panel device that can prevent deflection associated with an increase in size and suppress a decrease in detection sensitivity.

  In order to solve the above problems, a touch panel device of the present invention includes a transparent substrate, a touch panel having a sensor pattern layer formed on one surface of the transparent substrate, and a surface on the sensor pattern layer side of the touch panel. And a protective panel bonded by the first adhesive layer.

  According to said structure, since the protective panel adhere | attached by the 1st adhesive bond layer is provided in the surface at the side of the sensor pattern layer in a touch panel, the bending accompanying the enlargement of a touch panel can be prevented. Further, in the touch panel, the sensor pattern layer is formed on the surface of the transparent substrate on the protective panel side, so that it is possible to prevent the gap between the touch surface, which is the outer surface of the protective panel, and the sensor pattern layer from being widened. A decrease in detection sensitivity of the touch panel can be suppressed.

  In the touch panel device, the transparent substrate includes a film-shaped first transparent substrate on which the sensor pattern layer is formed on one surface, and a surface on which the sensor pattern layer of the first transparent substrate is formed. It is good also as a structure provided with the 2nd transparent substrate adhere | attached by the 2nd adhesive bond layer on the surface on the opposite side.

  According to said structure, it corresponds also to the touch panel in which the sensor pattern layer is formed in the film-like 1st transparent substrate, and prevention of the deflection accompanying the enlargement of a touch panel and suppression of the fall of the detection sensitivity of a touch panel are possible. It is.

  In the touch panel device, the area of the sensor pattern layer formation region on the first surface of the transparent substrate on which the sensor pattern layer is formed is smaller than the area of the first surface, and the first adhesion The agent layer may be arranged around the sensor pattern layer on the first surface.

  According to said structure, the area of the formation area of the sensor pattern layer in the 1st surface in which the sensor pattern layer of the transparent substrate is formed is smaller than the area of the 1st surface, The 1st adhesive bond layer is , Disposed around the sensor pattern layer on the first surface. Therefore, the space | interval of the touch surface which is an outer surface of a protection panel, and a sensor pattern layer can further be suppressed, and the fall of the detection sensitivity of a touch panel can be suppressed further reliably.

  In the above touch panel device, the first adhesive layer may be formed on a surface of the sensor pattern layer facing the protective panel.

  According to said structure, since the 1st contact bonding layer is formed in the opposing surface with the protection panel in a sensor pattern layer, the formation area of a 1st contact bonding layer can be ensured widely, and it protects with respect to a touch panel. The panel can be firmly bonded.

  According to the structure of this invention, since the protection panel is provided, the bending accompanying the enlargement of a touch panel can be prevented. In addition, since the sensor pattern layer is formed on the surface of the transparent substrate on the side of the protective panel, it is possible to prevent the distance between the touch surface, which is the outer surface of the protective panel, and the sensor pattern layer from widening, thereby detecting the touch panel. A decrease in sensitivity can be suppressed.

It is a longitudinal cross-sectional view which shows the touchscreen apparatus in embodiment of this invention. It is a longitudinal cross-sectional view which shows in more detail the structure of the touch panel in the touch panel apparatus shown in FIG. FIG. 3 is a plan view of the touch panel shown in FIG. 2. It is a longitudinal cross-sectional view of a display apparatus with a touch panel provided with the touch panel apparatus shown in FIG. It is a longitudinal cross-sectional view which shows in detail the structure of the touchscreen of the touchscreen apparatus in other embodiment of this invention. It is a longitudinal cross-sectional view of a display apparatus with a touch panel provided with the touch panel apparatus of further another embodiment of this invention. It is a longitudinal cross-sectional view which shows an example of the conventional touch panel.

[Embodiment 1]
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a touch panel device 1 according to an embodiment of the present invention. As shown in FIG. 1, the touch panel device 1 includes a touch panel 11 and a protection panel 12 provided on the front surface (upper surface in FIG. 1) of the touch panel 11.

  The protection panel 12 is made of, for example, transparent glass, and the front surface (upper surface in FIG. 1) is the touch surface 1a. The touch panel 11 includes a transparent substrate 21 made of glass, for example, and a sensor pattern layer 22 is formed on the front surface (upper surface in FIG. 1) of the transparent substrate 21. The sensor pattern layer 22 detects a user's touch operation on the touch surface 1a.

  In the present embodiment, the protective panel 12 is bonded to the front surface of the sensor pattern layer 22 of the touch panel 11 with a transparent adhesive layer (first adhesive layer) 13. The transparent adhesive layer 13 is formed by applying a transparent adhesive on the front surface of the sensor pattern layer 22. The protective panel 12 may be colored and printed on the peripheral portion so that the peripheral pattern for taking out the sensor pattern is not visible from the outside. In order to prevent EMI (Electromagnetic interference), the peripheral portion may be printed using conductive ink. In this case, it is necessary to arrange an insulating member (insulating layer) between the sensor pattern and the peripheral printing.

  Next, the configuration of the touch panel device 1 will be described in more detail. FIG. 2 is a longitudinal sectional view showing the configuration of the touch panel 11 in the touch panel device 1 shown in FIG. 1 in more detail. FIG. 3 is a plan view of the touch panel 11 shown in FIG.

  As shown in FIG. 2, the sensor pattern layer 22 in the touch panel 11 has a first metal layer 51, a first insulating layer 52, a second metal layer 53, and a third insulating layer 54 stacked on the transparent substrate 21 in order. Is formed.

  As shown in FIG. 3, the first metal layer 51 has a large number of electrode groups extending in parallel in the lateral direction, and the second metal layer 53 is vertically arranged so as to be orthogonal to the electrode groups of the first metal layer 51. It has a large number of electrode groups extending parallel to the direction.

  The first metal layer 51 and the second metal layer 53 are formed of a metal such as aluminum, copper, or silver. Or it forms with a transparent conductor (ITO: Indium Tin Oxide).

  The touch panel device 1 shown in FIG. 1 is provided in a display device 31 with a touch panel, for example, as shown in FIG. 4 is a longitudinal sectional view of a display device 31 with a touch panel including the touch panel device 1 shown in FIG.

  As shown in FIG. 4, the display device 31 with a touch panel includes a housing 41 and a liquid crystal display device 42 inside the housing 41. Further, a backlight 43 is provided on the back side of the liquid crystal display device 42, and the touch panel device 1 is provided on the front side of the liquid crystal display device 42.

  The liquid crystal display device 42 and the backlight 43 are fixed to each other by a transparent adhesive layer 44, and the liquid crystal display device 42 and the touch panel 11 are fixed to each other by a transparent adhesive layer 45.

  In the example of FIG. 4, the protection panel 12 is formed in a size larger than the touch panel 11. Further, the liquid crystal display device 42 may be other display devices. When the display device 31 with a touch panel includes, for example, an organic EL display device instead of the liquid crystal display device 42, the backlight 43 is not necessary.

  In the configuration described above, the touch panel device 1 is configured such that the touch panel 11 is formed by forming the sensor pattern layer 22 on the front surface of the transparent substrate 21, and the protective panel 12 is bonded to the front surface of the touch panel 11. Therefore, in order to prevent the deflection of the touch panel 11, the distance from the touch surface 1 a that is the front surface of the protection panel 12 to the sensor pattern layer 22 of the touch panel 11 even if the protection panel 12 is disposed on the front surface of the touch panel 11. Can be prevented from becoming longer. Thereby, the fall of the detection sensitivity in the touch panel 11, ie, the sensor pattern layer 22, can be suppressed.

  Hereinafter, a specific example of the touch panel device 1 in which the configuration in which the sensor pattern layer 22 is formed on the front surface of the transparent substrate 21 and the protective panel 12 is disposed on the front surface of the sensor pattern layer 22 will be described.

  The transparent substrate 21 has a vertical and horizontal size of 200 mm × 150 mm or more and a thickness in the range of 0.2 mm to 1.0 mm. The protective panel 12 has a vertical and horizontal size of 220 mm × 170 mm or more and a thickness in the range of 0.5 mm to 4.0 mm. In addition, this size is an example and is not limited to this size.

  The material of the transparent substrate 21 and the protection panel 12 is, for example, glass, acrylic, or polycarbonate.

[Embodiment 2]
Another embodiment of the present invention will be described below with reference to the drawings.
FIG. 5 is a longitudinal sectional view showing in detail the configuration of the touch panel 65 in the touch panel device 1 of the present embodiment.

  As shown in FIG. 5, the transparent substrate 21 in the touch panel 65 includes a first transparent substrate 61 made of, for example, a film and a second transparent substrate 62 made of, for example, glass, and these first transparent substrate 61 and second transparent substrate 62 are made. Are bonded to each other by a transparent adhesive layer (second adhesive layer) 63.

  In the touch panel 65, the sensor pattern layer 22 is formed on the first transparent substrate 61. In this case, the first metal layer 51 and the second metal layer 53 may be formed by a method such as etching or printing. The first insulating layer 52 and the third insulating layer 54 may be formed of a resin film such as PET (Polyethylene terephthalate) or TAC (Triacetylcellulose). Such a method of forming the first and second metal layers 51 and 53 and the first and third insulating layers 52 and 54 can also be applied to the touch panel 11 described above. Other configurations are the same as those of the touch panel device 1 described above.

  Also in the touch panel device 1 of the present embodiment including the touch panel 65, when the protective panel 12 is bonded to the front surface of the touch panel 65 in order to prevent the touch panel 65 from being bent, the touch panel 65 extends from the touch surface 1 a to the sensor pattern layer 22. The situation where the distance becomes long can be suppressed. Thereby, similarly, the fall of the detection sensitivity in the touch panel 65, ie, the sensor pattern layer 22, can be suppressed.

  For example, when the transparent substrate 21 is composed only of the first transparent substrate 61 and the first transparent substrate 61 is thin, the transparent substrate 21 (first transparent substrate 61) bends by its own weight and has low rigidity. Problems arise. Therefore, this problem can be solved by bonding the first transparent substrate 61 and the second transparent substrate 62 to form the transparent substrate 21 as in the touch panel 65 shown in FIG.

[Embodiment 3]
Still another embodiment of the present invention will be described below with reference to the drawings.
FIG. 6 is a longitudinal sectional view of a display device 31 with a touch panel provided with the touch panel device 75 of the present embodiment.

  As shown in FIG. 6, in the touch panel device 75 provided in the display device 31 with a touch panel, the area of the sensor pattern layer 22 is slightly smaller than the area of the transparent substrate 21. Specifically, the area of the formation region of the sensor pattern layer 22 on the first surface where the sensor pattern layer 22 of the transparent substrate 21 is formed is smaller than the area of the first surface of the transparent substrate 21.

  Thereby, a frame-shaped region is formed around the sensor pattern layer 22 on the front surface of the transparent substrate 21. A double-sided tape 71 is disposed in this region, and the protective panel 12 is adhered to the transparent substrate 21 by the double-sided tape 71, and as a result, the protective panel 12 is disposed on the front surface of the sensor pattern layer 22. The other configuration is as described based on FIG.

  Also in the touch panel device 75 of the present embodiment, when the protective panel 12 is arranged on the front surface of the touch panel 11 in order to prevent the touch panel 11 from being bent, the distance from the touch surface 1a to the sensor pattern layer 22 becomes long. Can be suppressed. Thereby, similarly, the fall of the detection sensitivity in the touch panel 65, ie, the sensor pattern layer 22, can be suppressed.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be used as input means provided on the display surface of various display devices.

DESCRIPTION OF SYMBOLS 1 Touch panel apparatus 1a Touch surface 11 Touch panel 12 Protection panel 13 Transparent adhesive layer (1st adhesive layer)
DESCRIPTION OF SYMBOLS 21 Transparent substrate 22 Sensor pattern layer 31 Display apparatus with a touch panel 41 Case 42 Liquid crystal display device 43 Backlight 51 1st metal layer 52 1st insulating layer 53 2nd metal layer 54 3rd insulating layer 61 1st transparent substrate 62 2nd Transparent substrate 63 Transparent adhesive layer (second adhesive layer)
71 Double-sided tape 75 Touch panel device

Claims (4)

A touch panel having a transparent substrate and a sensor pattern layer formed on one surface of the transparent substrate;
A touch panel device comprising: a protective panel adhered to a surface of the touch panel on the sensor pattern layer side by a first adhesive layer.   The transparent substrate has a film-like first transparent substrate on which the sensor pattern layer is formed on one surface, and a surface opposite to the surface on which the sensor pattern layer is formed on the first transparent substrate. The touch panel device according to claim 1, further comprising a second transparent substrate bonded by a second adhesive layer. The area of the formation region of the sensor pattern layer on the first surface of the transparent substrate on which the sensor pattern layer is formed is smaller than the area of the first surface,
The touch panel device according to claim 1, wherein the first adhesive layer is disposed around the sensor pattern layer on the first surface.   The touch panel device according to claim 1, wherein the first adhesive layer is formed on a surface of the sensor pattern layer facing the protective panel.

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