KR102186807B1 - Capacitive touch panel substrate and display device - Google Patents

Abstract

The capacitive touch panel substrate 10 according to the present invention includes a translucent substrate 1, a plurality of first direction transparent electrode units 2a provided on one side of the translucent substrate 1, and a first direction transparent. A first direction connecting portion 3a for connecting the electrode units 2a, a plurality of second direction transparent electrode units 2b formed on the same surface as the first direction transparent electrode unit 2a, and a second direction transparent electrode unit (2b) It has the 2nd direction connection part 3b which connects each other, and the low reflection layer 6. The second direction connecting portion 3b is insulated from the first direction connecting portion 3a through the insulating layer 4 and includes a reflective conductive layer 5. The low-reflective layer 6 exhibits low reflectivity in which the Y value in the Yxy color system using the standard light source C is 10% or less by the International Lighting Commission (CIE), and is perpendicular to one side of the light-transmitting substrate 1 When observed from the phosphorus direction, it overlaps at least partially with the reflective conductive layer 5.

Description

Capacitive touch panel board and display device {CAPACITIVE TOUCH PANEL SUBSTRATE AND DISPLAY DEVICE}

The present invention relates to a capacitive touch panel substrate and a display device. In particular, the present invention relates to a capacitive touch panel substrate in which connection portions between transparent electrode units arranged in two directions are less pronounced, and a display device including the same.

In recent years, in various display devices such as smart phones and tablet PCs (personal computers), touch panels are rapidly spreading as position input devices used in combination with display panels. BACKGROUND ART Touch panels have been known for various types of methods such as electromagnetic induction type and resistive film type and have been used for various purposes. .

11A shows a display panel 40 in which a touch panel 30 including a conventional capacitive touch panel substrate 20 displays an image such as a liquid crystal display panel or an EL panel (electroluminescent panel). It is an exploded plan view schematically showing an example of a conventional display device 200 having a configuration disposed between the front protective plate 50 for a display device including a cover glass or the like.

FIG. 11(b) is a partially enlarged plan view paying attention to the transparent electrode unit of the conventional capacitive touch panel substrate 20 in FIG. 11(a), and FIG. 11(c) is FIG. 11(b) It is a partially enlarged cross-sectional view paying attention to the connection part between transparent electrode units in. Fig. 12 is a partially enlarged cross-sectional view of a connection portion taken along line C-C in Fig. 11C.

In general, in the capacitive touch panel substrate 20, as shown in FIGS. 11(b) and 11(c), the first-direction transparent electrode units 2a arranged in the vertical Y direction in the drawing. ) And a second direction transparent electrode unit 2b arranged in the X direction, which is a left-right direction in the drawing. Here, the Y direction is also referred to as a first direction, and the X direction is also referred to as a second direction.

The conventional capacitive touch panel substrate 20 is an example of a form in which a first direction transparent electrode unit 2a and a second direction transparent electrode unit 2b are formed on the same side of the light-transmitting substrate 1 (See Patent Document 1). This form has an advantage of improving the relative positional accuracy of the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b.

That is, the conventional capacitive touch panel substrate 20 exemplified in the above drawings is arranged in the first direction (Y direction in the drawing) on the surface of the first surface S1 of the translucent substrate 1. The one-way transparent electrode unit 2a and the first-direction connecting portion 3a formed on the same surface of the same material as the first direction transparent electrode unit 2a and connecting the first direction transparent electrode units 2a to each other, , The first direction transparent electrode unit 2a is formed on the same surface of the same material as the first direction transparent electrode unit 2a, and is positioned between the first direction connection portions 3a, and the first direction The second direction transparent electrode units 2b arranged in the second direction (X direction in the drawing) intersecting with (Y direction) and the second direction transparent electrode units 2b are connected to each other, and the first direction connection part 3a ) And has a second direction connecting portion 3b insulated through the insulating layer 4.

At this time, the second directional connection part 3b is formed of the same material as the second directional transparent electrode unit 2b as in the first directional connection part 3a in that transparency can be obtained. It is a form that can reduce cost by using a smaller area than the electrode unit, and is installed on the outer periphery of the position detection area where the first direction transparent electrode unit (2a) and the second direction transparent electrode unit (2b) are arranged. A wiring 7 made of a metal material to be formed and a form of simultaneous formation of the same material are known (see Patent Document 1).

That is, as shown in the cross-sectional view of Fig. 12, the second direction connecting portion 3b is made of a reflective conductive layer 5 made of a metal material, and the reflective conductive layer 5 is made of a metal layer such as a silver alloy. It has silver metallic reflectivity.

Even if the second direction connection part 3b is formed of the same material as the second direction transparent electrode unit 2b, the first direction transparent electrode unit 2a and the second direction are transparent in relation to the insulating layer 4 being provided. Since it cannot be formed simultaneously with the electrode unit 2b, an additional step is required. However, if the second direction connecting portion 3b is formed of the same material as the wiring 7 in the outer peripheral portion of the position detection region, the number of steps can be reduced by that amount.

Japanese Patent Application Publication No. 2011-86122

However, as shown in the cross-sectional view of Fig. 12, if the second direction connecting portion 3b is formed of the reflective conductive layer 5, unlike the transparent electrode, it is reflected when the light L touches it, so it may become prominent. have. The phenomenon in which the reflective conductive layer 5 is remarkable tends to become more pronounced as the size of the touch panel decreases, the distance from the eyes of the observer or the operator of the touch panel to the display panel by transmitting it becomes closer.

An object of the present invention is to provide a capacitive touch panel substrate in which a connection portion between transparent electrode units arranged in two directions intersecting each other is made difficult to stand out. Further, it is to provide a display device provided with this.

The capacitive touch panel substrate according to the present invention includes a light-transmitting substrate having a first surface and a second surface opposite to the first surface,

A plurality of first direction transparent electrode units arranged in a first direction on any one of the first surface and the second surface of the light-transmitting substrate,

A first direction connecting portion formed on the same surface of the first direction transparent electrode unit and of the same material as the first direction transparent electrode unit, and connecting the first direction transparent electrode units;

A second direction formed on the same surface of the first direction transparent electrode unit and of the same material as the first direction transparent electrode unit and between the first direction transparent electrode units and between the first direction connection portions, and crosses the first direction A plurality of second direction transparent electrode units arranged as,

A second direction connecting portion that connects the second direction transparent electrode units to each other, is insulated from the first direction connecting portion through an insulating layer, and includes a reflective conductive layer,

Shows low reflectivity in which the Y value in the Yxy color system using a standard light source (C) by the International Illumination Committee (CIE) is 10% or less, and when observed from a direction perpendicular to the one side of the translucent substrate, the reflectivity It has a low-reflective layer overlapping at least a part of the conductive layer.

In the capacitive touch panel substrate according to the present invention, an area of a portion where the low-reflective layer and the reflective conductive layer overlap may be 30% or more of the area of the reflective conductive layer.

In the capacitive touch panel substrate according to the present invention, the outer contour shape of the low-reflective layer when viewed from a direction perpendicular to the one side of the translucent substrate includes an outer contour shape of the reflective conductive layer inside You can do it.

In the capacitive touch panel substrate according to the present invention, the first direction transparent electrode unit and the second direction transparent electrode unit are arranged at an outer periphery of a position detection area and have a decoration on one side of the light-transmitting substrate, and the The low reflection layer may be formed of the same material as the decorative portion.

In the capacitive touch panel substrate according to the present invention, the first direction transparent electrode unit and the second direction transparent electrode unit are arranged at an outer periphery of a position detection area, and have a wiring on the one side of the light-transmitting substrate, and the The reflective conductive layer may be formed of the same material as the wiring.

In the capacitive touch panel substrate according to the present invention, the low-reflective layer may be formed on the side of the translucent substrate with respect to the reflective conductive layer in the thickness direction.

In the capacitive touch panel substrate according to the present invention, the low-reflective layer may be formed between the reflective conductive layer and the light-transmitting substrate.

In the capacitive touch panel substrate according to the present invention, a surface of the light-transmitting substrate on the opposite side to the one surface may function as an input surface of the touch panel.

In the capacitive touch panel substrate according to the present invention, the low-reflective layer may be formed on a side farther from the light-transmitting substrate than the reflective conductive layer in the thickness direction.

Further, a display device according to the present invention includes a display panel and the above-described capacitive touch panel substrate disposed on the observer side of the display panel.

According to the capacitive touch panel substrate of the present invention, the connection portion between transparent electrode units arranged in two directions intersecting each other can be made difficult to stand out.

According to the display device of the present invention, the capacitive touch panel substrate provided therein has the above effect.

Fig. 1(a) is a schematic plan view illustrating an embodiment (linear connection) of a capacitive touch panel substrate according to the present invention, and Fig. 1(b) is a CC line in Fig. 1(a) It is a partial enlarged cross-sectional view of the connection part at.
Fig. 2(a) is a schematic plan view illustrating another embodiment (post-formed connection) of a capacitive touch panel substrate according to the present invention, and Fig. 2(b) is a CC in Fig. 2(a) It is a partial enlarged cross-sectional view of the connection part in line.
3A is a schematic plan view illustrating another embodiment (linear connection, through-hole connection) of the capacitive touch panel substrate according to the present invention, and FIG. 3B is ) Is a partially enlarged cross-sectional view of the connection part on the CC line.
Fig. 4(a) is a schematic plan view for explaining another embodiment (post-formed connection part, through-hole connection) of the capacitive touch panel substrate according to the present invention, and Fig. 4(b) is It is a partial enlarged cross-sectional view of the connection part in the CC line in a).
FIG. 5A is a schematic plan view illustrating another embodiment of the capacitive touch panel substrate according to the present invention (a reflective conductive layer is partially exposed from the low-reflective layer), and FIG. 5B is It is a partial enlarged sectional view of the connection part in the CC line in (a).
6A and 6B are plan views each illustrating an example of exposure of the reflective conductive layer in the form of FIG. 5.
7A is a plan view illustrating another embodiment of the capacitive touch panel substrate according to the present invention (the low-reflective layer is the same material as the decorative portion), and FIG. 7B is a view showing a portion of the infrared transmission window. Fig. 7(c) is a partially enlarged cross-sectional view of a connecting portion corresponding to Fig. 1(b).
Fig. 8 is a partially enlarged cross-sectional view (corresponding to the configuration of Fig. 1B) showing another embodiment (with an overcoat layer) of the capacitive touch panel substrate according to the present invention.
9 is a cross-sectional view illustrating an embodiment of a display device according to the present invention.
10 is a cross-sectional view illustrating another embodiment of a display device according to the present invention.
FIG. 11A is an exploded plan view showing an example of a conventional display device including a touch panel using a conventional capacitive touch panel substrate, a display panel, and a front protective plate for the display device. (b) is a partially enlarged plan view showing an example of a transparent electrode unit of a capacitive touch panel substrate, and FIG. 11C is a partially enlarged plan view showing an example of a connection portion between transparent electrode units.
Fig. 12 is a partially enlarged cross-sectional view of the connecting portion along the CC line in Fig. 11C.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the drawings are conceptual diagrams, and scale relations, aspect ratios, and the like of constituent elements may be exaggerated as appropriate depending on circumstances in the description.

[A] Definition of terms:

Hereinafter, the definitions of the main terms used in the present invention will be described here.

"Surface" means in the capacitive touch panel substrate 10 or other components, when the capacitive touch panel substrate 10 is used in combination with the display panel 40, from the display panel 40 It is the side where the display light exits, and means the side of the observer who observes the display of the display panel 40.

In addition, the "front side" means the side of the operator who operates the touch panel 30 using the capacitive touch panel substrate 10 in the capacitive touch panel substrate 10 or other components.

The "back side" means the side opposite to the "front side", and in the capacitive touch panel substrate 10 or other constituent elements, it means the side on which the display light of the display panel 40 is received.

With the "first surface" and the "second surface", which one becomes the said "front side", and which side becomes the said "front side" is arbitrary.

With the "first side" and the "second side", which side becomes the "one side" and which side becomes the "the other side" is arbitrary.

However, in this specification, the side surface on which the 1st direction transparent electrode unit 2a and the 2nd direction transparent electrode unit 2b are provided is referred to as "one side." Whether this "one side" becomes the "front side" or the "back side" depends on the usage method related to the layer structure of the capacitive touch panel substrate 10. The capacitive touch panel substrate 10 is used so that the low-reflective layer 6 is on the front side of the reflective conductive layer 5.

In this specification, the form in which the "one side" is used as the "back side" is mainly described, and the form used as the "front side" is also described.

[B] Capacitive touch panel substrate 10:

A capacitive touch panel substrate 10 according to the present invention will be described for each embodiment.

<< first embodiment: linear connection part >>

Fig. 1(a) is a schematic plan view of a first embodiment of a capacitive touch panel substrate 10 according to the present invention, and Fig. 1(b) is a part along the CC line in Fig. 1(a) It is an enlarged cross-sectional view.

This embodiment is a form of a structure obtained by first forming the second direction connecting portion 3b, and then forming the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b.

The capacitive touch panel substrate 10 of the embodiment shown in Fig. 1,

A light-transmitting substrate 1,

On one side of the translucent substrate 1, a plurality of first direction transparent electrode units 2a arranged in a first direction,

A first direction connecting portion 3a formed on the same surface of the first direction transparent electrode unit 2a and for connecting the first direction transparent electrode units 2a to each other,

The first direction transparent electrode unit 2a is formed on the same surface of the same material as the first direction transparent electrode unit 2a, and is positioned between the first direction connection portions 3a, A plurality of second direction transparent electrode units 2b arranged in intersecting second directions,

The second direction transparent electrode units 2b are connected to each other, and the second direction connecting portion 3b including the reflective conductive layer 5 is insulated from the first direction connecting portion 2a through the insulating layer 4 ,

By the International Illumination Committee (CIE), the Yxy color system using a standard light source (C) exhibits low reflectivity where the Y value is 10% or less, and is perpendicular to the first side (S1), which is the one side of the translucent substrate (1). When observed from the phosphorus direction, the reflective conductive layer 5 is at least partially overlapped.

In addition, in this embodiment, the overlapping of the reflective conductive layer 5 and the low reflective layer 6 is low when observed from a direction perpendicular to the first surface S1, which is the one side of the light-transmitting substrate 1. The outer contour shape of the reflective layer 6 is in an alignment state including the outer contour shape of the reflective conductive layer 5 inside. In other words, this is 100% of the area of the reflective conductive layer 5, that is, the low-reflective layer 6 overlaps the entire area.

In the present embodiment, the first surface S1 serving as one surface of the light-transmitting substrate 1 is a surface above the drawing in the cross-sectional view of FIG. 1B. Therefore, in this cross-sectional view, the capacitive touch panel substrate 10 is used with the second surface S2 at the lower side of the drawing as the front side toward the observer V of the display panel who is also the operator of the touch panel. It is an assumed form.

In the same figure, in the XY Cartesian coordinate system, the Y direction is the first direction, and the X direction is the second direction.

In addition, in the present invention, the first direction and the second direction intersecting each other do not necessarily need to be orthogonal.

A schematic plan view of FIG. 1A is a plurality of first-direction transparent electrode units 2a arranged in a first direction and a plurality of second directions arranged in a second direction within the position detection area Ap. Not all of the transparent electrode units 2b are shown. Paying attention to the portion of the second direction connecting portion 3b that connects the second direction transparent electrode units 2b to each other, only one second direction connecting portion 3b and its periphery are shown as a representative. In addition, only one wiring 7 formed on the outer periphery of the position detection area Ap is also schematically shown as being connected to the first direction transparent electrode unit 2a, and the second direction transparent electrode unit 2b The illustration of the wiring 7 to be connected to is omitted.

In addition, in the same figure, the first direction transparent electrode extension part (the first direction transparent electrode unit 2a and the first direction transparent electrode extension part ( 7a) is provided in the outer peripheral part of the position detection area Ap.

1A is a plan view of the capacitive touch panel substrate 10 viewed from the "back side" of the side on which the reflective conductive layer 5, the low reflection layer 6, and the like are formed. In Fig. 1(a), an insulating layer 4, a reflective conductive layer 5, and a low-reflective layer formed on the opposite side of a transparent layer such as a first direction transparent electrode unit 2a and a second direction transparent electrode unit 2b. (6) If the transparent layer is opaque, it is a layered positional relationship that is originally hidden, so it is drawn with a broken line. However, the indication with a broken line is for the purpose of facilitating understanding to the last, and does not accurately express the layered positional relationship.

Between the plan view of Fig. 1(a) and the partially enlarged cross-sectional view of Fig. 1(b), the relationship between the dimensions of the respective constituent elements such as the left and right directions in the drawing is not maintained.

Regarding these drawing representations, the same applies to drawings in other embodiments of the present invention.

In this embodiment, the outer contour shape of the low-reflective layer 6 when viewed from a direction perpendicular to the first surface S1, which is the one surface of the light-transmitting substrate 1, is the outer side of the reflective conductive layer 5 It is sufficient to include the outline shape inside, the same, and may be completely overlapped.

In the present embodiment shown in FIG. 1, the outer contour shape of the low reflection layer 6 is a rectangular shape, and the outer contour shape of the reflective conductive layer 5 is also a rectangular shape. The outer contour shape of the low reflection layer 6 is larger than the outer contour shape of the reflective conductive layer 5. In addition, the outer contour shape of the low reflection layer 6 is pushed outward with respect to the outer contour shape of the reflective conductive layer 5 around the entire circumference thereof. In addition, in this invention, the outer contour shape of the low reflection layer 6 is arbitrary, and is not limited to a rectangle. The same applies to the reflective conductive layer 5.

The outer contour shape of the low-reflective layer 6 is meant to have some margin in the alignment accuracy, and is 0.5 μm or more, preferably 1 μm or more, around the entire outer contour of the reflective conductive layer 5. , More preferably, it is desirable to have a large shape protruding from 2 µm or more, and still more preferably 4 µm or more. However, even if it is pushed out, it is preferably 100 µm or less, preferably 30 µm or less, and more preferably 10 µm or less. This is because if it is pushed out too much, the low-reflective layer 6 penetrates through the touch panel to block the display of the visible display panel, thereby adversely affecting the display quality.

In this embodiment, the low-reflective layer 6 is on the side of the light-transmitting substrate 1 with respect to the reflective conductive layer 5 in the thickness direction, more specifically, the reflective conductive layer 5 and the light-transmitting substrate 1 It is a form formed between.

However, in the present invention, the term "the side of the light-transmitting substrate 1 with respect to the reflective conductive layer 5" means the low-reflective layer 6 on the other side of the light-transmitting substrate 1, that is, the second surface S2. The form in which this is formed is also included. In short, in the capacitive touch panel substrate 10 of the present invention, an operator who operates a touch panel using the capacitive touch panel substrate 10, which is a display panel to which the capacitive touch panel substrate 10 is applied. Although it is also the observer V who observes 40, it is set as the structure which has the low reflection layer 6 on the side closer than the reflective conductive layer 5 to this observer V.

〔Material and formation method〕

[Translucent Substrate (1)]

A known material can be used for the light-transmitting substrate 1, and is typically a glass plate, but a resin material such as polyester resin may be used.

[First direction transparent electrode unit 2a, second direction transparent electrode unit 2b, and first direction connection part 3a]

The first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection part 3a may employ known materials and forming methods. For example, a transparent conductor thin film such as ITO (Indium Tin Oxide; Indium Tin Oxide), IZO (Indium Zinc Oxide; Indium Zinc Oxide), and AZO (Aluminum Zinc Oxide; aluminum zinc oxide) is patterned by photolithography or the like. You can use what you formed.

[Second direction connecting portion 3b and reflective conductive layer 5]

The second direction connecting portion 3b includes at least a reflective conductive layer 5.

For the reflective conductive layer 5, known materials and forming methods such as metal wiring materials other than the transparent conductor thin film can be employed. For example, for the reflective conductive layer 5, metals (including alloys thereof) such as silver, gold, copper, chromium, platinum, aluminum, palladium, and molybdenum can be used. For example, as a metal layer of an alloy (also referred to as APC) made of silver, palladium and copper, a film formed by a sputtering method and then patterned by a photolithography method can be used. The reflective conductive layer 5 formed of these metallic materials exhibits reflectivity peculiar to metal, and is usually opaque. For this reason, since it is easy to reflect light and stand out, it becomes difficult to stand out in the low reflection layer 6.

The reflectivity of the reflective conductive layer 5 means that the reflectance is 50% or more on the average of the visible light region (380 to 780 nm). For example, in general, silver is 90% or more, aluminum is 80% or more, and gold is reduced to close to 50% in a short wavelength region, but shows 50% or more on average.

The reflective conductive layer 5 is not limited to a metal material, and may be a conductive polymer as long as it exhibits reflectivity, for example.

In this embodiment, the reflective conductive layer 5 is formed of a silver alloy (also referred to as APC) made of silver, palladium, and copper as a metal layer patterned by a photolithography method.

In this embodiment, the reflective conductive layer 5 and the wiring 7 are formed of the same material, and are formed simultaneously on the same surface, specifically on the first surface S1, which is one surface of the translucent substrate 1 .

The dimensions of the external shape of the reflective conductive layer 5 are, for example, a rectangle having a width of 5 to 20 µm and a length of 20 to 500 µm in this embodiment shown in FIG. 1. The said width is a dimension in a 1st direction (drawing Y direction), and the said length is a dimension in a 2nd direction (drawing X direction).

In addition to the reflective conductive layer 5, the second direction connecting portion 3b further includes a transparent conductive thin film such as ITO described above, and has a structure in which the transparent conductive thin film is in contact with the reflective conductive layer 5 so as to be stacked. do.

[Insulation layer (4)]

The insulating layer 4 is an electrically insulating layer, and known materials and forming methods can be employed. The insulating layer 4 can be patterned by a photolithography method using, for example, an ultraviolet curable acrylic resin as a resin layer.

In addition, in this specification, both "insulation" and "connect" are used as terms in an electrical meaning.

The insulating layer 4 may be transparent or opaque, but transparent is preferable. This is because the transparency of the capacitive touch panel substrate 10 is not lowered. In this embodiment, the insulating layer 4 is formed as a transparent layer.

[Low reflection layer (6)]

The low-reflective layer 6 is a layer exhibiting low-reflectivity in which the Y value in the Yxy color system conforming to JIS-Z8701 using the standard light source C by the International Illumination Committee (CIE) is 10% or less. In addition, the measurement is, of course, performed from the side where the surface farther from the reflective conductive layer 5 is observed among the two layer surfaces of the low reflection layer 6. The low reflection layer 6 also exhibits light blocking properties (opacity) at the same time. This is because the reflected light from the reflective conductive layer 5 can be reduced. Therefore, the low-reflective layer 6 can also be referred to as a "concealment layer" that shows low-reflectivity and light-shielding properties and conceals the reflective conductive layer 5. The low reflection layer 6 can function as a layer for making the reflective conductive layer 5 inconspicuous.

From the viewpoint of making the reflective conductive layer 5 inconspicuous, the light-shielding property is 10% or less in terms of transmittance (1 or more in optical density (OD)), more preferably 1% or less in transmittance (optical concentration ( OD) 2.0 or more), more preferably 0.01% or less (optical concentration (OD) 4.0 or more) in terms of transmittance.

The low-reflective layer 6 is a layer that exhibits a dark color such as black containing a black pigment such as carbon black in a resin binder composed of a cured product of a curable resin, and can be patterned by a photolithography method. As the curable resin, a photosensitive resin such as an ultraviolet curable acrylic resin can be used. In this embodiment, a pattern is formed by the photolithography method using the low-reflection layer 6 and the ultraviolet-curable acrylic resin containing carbon black.

In order to make the low-reflection layer 6 a dark color such as black, a plurality of chromatic pigments other than carbon black, such as red, yellow, blue, and green, may be used to form a black layer. For example, it is good also as black using three colors of red, yellow, and blue color pigments. Dark color means a color in which the brightness is low in chromatic colors such as dark blue and dark green in addition to black, and the Y is 10% or less.

Therefore, as the color pigment used for the low reflection layer 6, one or two or more of a black pigment, a white pigment, a red pigment, a yellow pigment, a blue pigment, a green pigment, and a purple pigment can be used.

The low reflection layer 6 may be formed of an inorganic material such as chromium oxynitride that itself exhibits a dark color.

It is preferable that the low reflection layer 6 is electrically insulating. This is because, if the low-reflective layer 6 is conductive, depending on the combination of the layer configuration and the pattern shape, it becomes difficult to secure the insulating properties of the portions requiring insulation. For example, there is no problem in the present embodiment shown in Fig. 1, but in the second embodiment of Fig. 2 to be described later, it is difficult to secure the insulation between the second direction transparent electrode unit 2b and the first direction connection part 3a. It becomes.

[Wiring (7)]

For the wiring 7, known materials and forming methods can be employed. For example, for the wiring 7, metals such as silver, gold, copper, chromium, platinum, aluminum, palladium, and molybdenum (including alloys thereof) can be used. For example, as a metal layer of an alloy (also referred to as APC) made of silver, palladium and copper, a film formed by a sputtering method and then patterned by a photolithography method can be used.

In this embodiment, the wiring 7 is formed as a metal layer of a silver alloy (also referred to as APC) made of silver, palladium, and copper. That is, in the present embodiment, the reflective conductive layer 5 and the wiring 7 are formed of the same material, and are formed on the same surface, specifically on the first surface S1, which is one surface of the translucent substrate 1, at the same time. Is formed.

[Manufacturing method]

The capacitive touch panel substrate 10 as described above can be manufactured as follows.

First, the low-reflective layer 6 is formed on the first surface S1 which is one surface of the light-transmitting substrate 1. Subsequently, the reflective conductive layer 5 and the wiring 7 as the second direction connecting portion 3b are simultaneously patterned from the same material. Then, the insulating layer 4 is patterned. Subsequently, the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection portion 3a are simultaneously patterned with the same material. In this way, the capacitive touch panel substrate 10 can be manufactured.

[Effect in this embodiment]

By setting it as the above structure, in the capacitive touch panel substrate 10 in this embodiment, all the reflective conductive layers 5 used for the connection between the transparent electrode units are concealed by the low reflective layer 6. Therefore, the connection part can be made difficult to stand out effectively.

In addition, in this embodiment, since the reflective conductive layer 5 is formed of the same material as the wiring 7, the reflective conductive layer 5 is installed without increasing the number of steps in the same process as the wiring 7. Therefore, a structure in which the reflective conductive layer 5 is made inconspicuous can be realized without incurring cost.

<<Second Embodiment: Post-formed connection part>>

Fig. 2(a) is a schematic plan view of a second embodiment of the capacitive touch panel substrate 10 according to the present invention, and Fig. 2(b) is a part along the CC line in Fig. 2(a) It is an enlarged cross-sectional view.

This embodiment is a form of a structure obtained by first forming the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b, and then forming the second direction connecting portion 3b.

The capacitive touch panel substrate 10 of the embodiment shown in FIG. 2 is the same as that of the first embodiment shown in FIG. 1 except that the following points are different. Therefore, description of the same part is omitted.

a) The order of formation of the reflective conductive layer 5 and the wiring 7 and formation of the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection part 3a is reversed. Point (in other words, the positional relationship of the front and back layers through the insulating layer 4 is reversed)

b) The order of formation of the insulating layer 4 and the formation of the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection part 3a is reversed by the above a). The point in which the order of formation of the insulating layer 4 and formation of the reflective conductive layer 5 and wiring 7 is reversed.

[Manufacturing method]

The capacitive touch panel substrate 10 as described above can be manufactured as follows.

First, the low-reflective layer 6 is formed on the first surface S1 which is one surface of the light-transmitting substrate 1. Subsequently, the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection portion 3a are simultaneously patterned with the same material. Then, the insulating layer 4 is patterned. Subsequently, the reflective conductive layer 5 and the wiring 7 as the second direction connecting portion 3b are simultaneously patterned from the same material. In this way, the capacitive touch panel substrate 10 can be manufactured.

[Material of the reflective conductive layer 5 and wiring 7]

In this embodiment, pattern formation of the reflective conductive layer 5 and the wiring 7 is performed with respect to the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection portion 3a. Since it is performed after simultaneous pattern formation, it is also possible to obtain an advantage that the material of the reflective conductive layer 5 and the wiring 7 does not need to consider resistance to the etching solution during pattern formation such as the first direction transparent electrode unit 2a. .

For this reason, in this embodiment, as the material of the reflective conductive layer 5 and the wiring 7, a wiring material having a three-layer structure of molybdenum (Mo), aluminum (Al), and molybdenum (Mo) (referred to as MAM) You can also employ

[Effect in this embodiment]

Even with the configuration as described above, in the capacitive touch panel substrate 10 according to the present embodiment, the low-reflective layer 6 hides all of the reflective conductive layers 5 used for the connection between the transparent electrode units. Since it is made into, the connection part can be made difficult to stand out effectively.

In addition, in this embodiment, since the reflective conductive layer 5 is made of the same material as the wiring 7, the reflective conductive layer 5 can be installed in the same process as the wiring 7 without increasing the number of steps. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without incurring cost.

<<Third embodiment: Linear connection, through-hole connection >>

Fig. 3(a) is a schematic plan view of a third embodiment of a capacitive touch panel substrate 10 according to the present invention, and Fig. 3(b) is a part along the CC line in Fig. 3(a) It is an enlarged cross-sectional view.

In this embodiment, after forming the second direction connecting portion 3b first, the insulating layer 4 having the through hole 4h is formed over the entire position detection region Ap, and then the first direction The shape of the structure obtained by forming the transparent electrode unit 2a and the second direction transparent electrode unit 2b, and connecting the second direction transparent electrode unit 2b with the second direction connecting portion 3b through the through hole 4h to be.

The capacitive touch panel substrate 10 of the embodiment shown in FIG. 3 is the same as in the first embodiment shown in FIG. 1 except that the following points are different. Therefore, description of the same part is omitted.

a) Through-hole 4h for connecting the second direction transparent electrode unit 2b and the second direction connecting portion 3b, although the insulating layer 4 is formed not only in the connection portion but also in the entire position detection region Ap The point of non-formation.

b) A point in which the reflective conductive layer 5 as the second direction connecting portion 3b is connected to the second direction transparent electrode unit 2b at a portion of the through hole 4h by the above a).

[Manufacturing method]

In the capacitive touch panel substrate 10 as described above, the insulating layer 4 is formed at the same time as the through hole 4h as a non-formed portion of the layer at the time of pattern formation, so that the entire position detection region Ap is formed. Except for forming, it can be manufactured in the same manner as in the first embodiment.

[Effect in this embodiment]

Even with the configuration as described above, in the capacitive touch panel substrate 10 in the present embodiment, all of the reflective conductive layers 5 used for the connection between the transparent electrode units are hidden by the low reflective layer 6. Since it has a structure, the connection part can be made difficult to stand out effectively.

In addition, in this embodiment, since the reflective conductive layer 5 is formed of the same material as the wiring 7, the reflective conductive layer 5 is installed without increasing the number of steps in the same process as the wiring 7. Therefore, a structure in which the reflective conductive layer 5 is made inconspicuous can be realized without incurring cost.

<<Fourth Embodiment: Post-formed connection part, through-hole connection>>

Fig. 4(a) is a schematic plan view of a fourth embodiment of a capacitive touch panel substrate 10 according to the present invention, and Fig. 4(b) is a part along the CC line in Fig. 4(a) It is an enlarged cross-sectional view.

In this embodiment, after first forming the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b, the insulating layer 4 having the through hole 4h is formed in the position detection area Ap. It is the form of a structure obtained by forming the whole area, and then forming the second direction connecting portion 3b and connecting it with the second direction transparent electrode unit 2b through the through hole 4h.

The capacitive touch panel substrate 10 of the embodiment shown in FIG. 4 is the same as that of the second embodiment shown in FIG. 2 except that the following points are different. Therefore, description of the same part is omitted.

a) Through-hole 4h for connecting the second direction transparent electrode unit 2b and the second direction connecting portion 3b, although the insulating layer 4 is formed not only in the connection portion but also in the entire position detection region Ap The point of non-formation.

b) A point in which the reflective conductive layer 5 as the second direction connecting portion 3b is connected to the second direction transparent electrode unit 2b at a portion of the through hole 4h by the above a).

[Manufacturing method]

In the capacitive touch panel substrate 10 as described above, the insulating layer 4 is formed at the same time as the through hole 4h as a non-formed portion of the layer at the time of pattern formation, so that the entire position detection region Ap is formed. Except for forming, it can be manufactured in the same manner as in the second embodiment.

[Effect in this embodiment]

Even with the configuration as described above, in the capacitive touch panel substrate 10 according to the present embodiment, the low-reflective layer 6 hides all of the reflective conductive layers 5 used for the connection between the transparent electrode units. Since it is made into, the connection part can be made difficult to stand out effectively.

In addition, in this embodiment, since the reflective conductive layer 5 is made of the same material as the wiring 7, the reflective conductive layer 5 can be installed in the same process as the wiring 7 without increasing the number of steps. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without incurring cost.

《Fifth embodiment: partially exposed reflective conductive layer 5 from low reflection layer 6》

Fig. 5(a) is a schematic plan view of a fifth embodiment of a capacitive touch panel substrate 10 according to the present invention, and Fig. 5(b) is a part along the CC line in Fig. 5(a) It is an enlarged cross-sectional view.

In this embodiment, the low reflection layer 6 overlaps a part of the reflective conductive layer 5, and as a result, the reflective conductive layer 5 is partially exposed from the low reflection layer 6.

The capacitive touch panel substrate 10 of the embodiment shown in FIG. 5 is the same as that of the first embodiment shown in FIG. 1 except that the following points are different. Therefore, description of the same part is omitted.

a) The low-reflective layer 6 overlaps with a part of the reflective conductive layer 5, and the reflective conductive layer 5 is partially exposed from the low-reflective layer 6 and is seen.

[Alignment state of the low reflection layer 6 and the reflective conductive layer 5]

In each of the embodiments described so far, the low-reflective layer 6 overlaps all over the reflective conductive layer 5, and the outer contour shape of the low-reflection layer 6 is inside the outer contour shape of the reflective conductive layer 5 It was included. For this reason, the reflective conductive layer 5 is completely concealed with the low-reflective layer 6 all over it, and the reflective conductive layer 5 is not seen.

In terms of making the reflective conductive layer 5 inconspicuous, it is preferable that the reflective conductive layer 5 overlaps the low-reflective layer 6 all over it, but even if the reflective conductive layer 5 is somewhat visible, practically, If the adverse effect on the display quality by the reflective conductive layer 5 is minor, and if the deterioration of the display quality by the reflective conductive layer 5 is acceptable, the reflective conductive layer 5 is a low-reflective layer 6 Some exposed form from

For example, even if it is said that it is the low reflection layer 6, since it blocks the display screen, considering the bad influence on display quality, the low reflection layer 6 is preferably as small as possible. That is, when taking into account the adverse effect on display quality caused by the low reflection layer 6 itself, the reflective conductive layer 5 may be partially exposed from the low reflection layer 6. That is, from the viewpoint of completely hiding the reflective conductive layer 5, the smallest shape of the low reflective layer 6 is the same shape as the reflective conductive layer 5 and has the same dimensions. However, if the generation of some exposed portions E is allowed, the outer contour shape of the low reflection layer 6 is smaller than the outer contour shape of the reflective conductive layer 5, the area of the low reflection layer 6 and It becomes possible to reduce the total area of the area of the exposed portion E even if some positional shift occurs. For this reason, the element which blocks the display screen can be made small.

In addition, when the alignment accuracy is not sufficient, and a part of the reflective conductive layer 5 is exposed from the low reflective layer 6 due to a positional shift in the relative positional relationship between the reflective conductive layer 5 and the low reflective layer 6 Can also be thought of.

In this fifth embodiment, under such a situation, the reflective conductive layer 5 is partially exposed from the low reflective layer 6.

In FIGS. 5A and 5B, the reflective conductive layer 5 is shifted from the low-reflective layer 6 to the right in the drawing. As a result, the reflective conductive layer 5 becomes a low-reflective layer ( It shows the situation where the exposed part E partially exposed from 6) occurred. As a result, the exposed portion E becomes visible from the observer V. In the same drawing, the reflective conductive layer 5 was shifted in position in the extension direction (X-axis direction) of the line, but the relationship between the relative position shift between the reflective conductive layer 5 and the low-reflective layer 6 is reflective conductivity. When the layer 5 is taken as a reference, the position may be misaligned in the line width direction, or may be misaligned in both the line extension direction and the line width direction of the reflective conductive layer 5.

6 is a diagram exemplified in the case of two directions with respect to the direction of the relative positional shift between the reflective conductive layer 5 and the low reflective layer 6. 6(a) shows the case in the line extension direction of the reflective conductive layer 5 (in the same drawing, the X-axis direction), and FIG. 6(b) is the line width direction of the line of the reflective conductive layer 5 (In the same figure, the case of the Y-axis direction) is shown. The directions indicated by both arrows in FIGS. 6A and 6B are the directions of relative positional shifts between the reflective conductive layer 5 and the low reflective layer 6. FIG. 6(a) corresponds to the positional shift relationship of FIG. 5.

6A shows a situation in which the low-reflective layer 6 is displaced from the X-axis direction to the right side of the drawing with respect to the reflective conductive layer 5, and an exposed portion E is generated on the left side of the reflective conductive layer 5 do. 6B shows a situation in which the low-reflective layer 6 is displaced from the Y-axis direction to the lower side of the drawing with respect to the reflective conductive layer 5, and an exposed portion E is generated above the reflective conductive layer 5 do. In these drawings, for ease of understanding, the reflective conductive layer 5 and the low-reflective layer 6 are not hatched inside the outer contour shape, but hatched only the exposed portion E. Further, the outline of the reflective conductive layer 5 at the portion covered by the low reflection layer 6 is indicated by a broken line.

(Area ratio where the reflective conductive layer 5 is concealed by the low reflective layer 6)

As described above, in the form in which the low reflection layer 6 overlaps a part of the reflective conductive layer 5 and the reflective conductive layer 5 is partially exposed from the low reflection layer 6, the low reflection layer 6 The area of the portion overlapping with) is set to an area ratio of 30% or more, preferably 50% or more, more preferably 70% or more, further preferably 80% or more of the area of the reflective conductive layer 5.

This is because if the area ratio is less than the above value, display quality may be deteriorated.

As can be seen from Fig. 6, even if the dimension in which the reflective conductive layer 5 protrudes from the low-reflective layer 6 is, for example, 1 μm or the like, and has the same dimension regardless of the direction in which it is pushed out, the reflective conductive layer 5 ) In the line direction (X-axis direction in the drawing) and when it is pushed out in the line width direction (Y-axis direction in the drawing), the reflective conductive layer 5 is exposed from the low-reflective layer 6 ( The area ratio of the area of E) to the area of the reflective conductive layer 5 is different. Particularly, the bad influence on the display quality of the exposed portion E of the reflective conductive layer 5 increases when it is displaced and pushed out in the line width direction shown in Fig. 6B. Even in such a situation, deterioration in display quality can be suppressed by making the area ratio concealed by the low-reflective layer 6 equal to or greater than the above value.

In a specific example, with respect to a line width of 15 µm of the reflective conductive layer 5, when only 3 µm in the line width direction in the entire length of the line is pushed out without being concealed by the low-reflective layer 6, the area ratio Silver becomes {(15 μm-3 μm)/15 μm}×100=80%.

[Effect in this embodiment]

Even with the configuration as described above, in the capacitive touch panel substrate 10 in the present embodiment, the low-reflective layer 6 hides a part of the reflective conductive layer 5 used for the connection between the transparent electrode units. Since it has a structure, the connection part can be made difficult to stand out. Further, it is also possible to suppress the adverse influence on display quality caused by the low reflection layer 6 itself.

In addition, in this embodiment, since the reflective conductive layer 5 is made of the same material as the wiring 7, the reflective conductive layer 5 can be installed in the same process as the wiring 7 without increasing the number of steps. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without incurring cost.

In addition, by allowing exposure of the reflective conductive layer 5 to a certain extent, the alignment accuracy can be improved, and manufacturing becomes easier while suppressing adverse effects on display quality, thereby enabling lower cost.

《Transformed form》

The capacitive touch panel substrate 10 of the present invention can take a form other than the form described above. Hereinafter, some of them will be described.

(The reflective conductive layer 5 is partially exposed from the low-reflective layer 6)

The fifth embodiment described as a form in which the reflective conductive layer 5 is partially exposed from the low reflective layer 6 was a modified form of the first embodiment.

However, in the present invention, the form in which the reflective conductive layer 5 is partially exposed from the low-reflective layer 6 is not limited to the modified form of the first embodiment. The form in which the reflective conductive layer 5 is partially exposed from the low-reflective layer 6 may be a modified form for other forms such as the second embodiment, the third embodiment, the fourth embodiment, or a modified form described later. have.

[Form using the exposed part (E) as a reflective part]

In the form in which the reflective conductive layer 5 is partially exposed from the low reflective layer 6, the exposed portion E, which is a portion of the reflective conductive layer 5 exposed from the low reflective layer 6, may be actively used as a reflective portion. do.

For example, in game devices such as shooting games, with respect to a display device in which a touch panel including a capacitive touch panel substrate 10 is disposed on the observer side of the display panel, an arbitrary position in the display screen is A reflection that is indicated by light irradiation from the shape light controller, and detects the indicated position in the display screen by receiving the reflected light reflected from the reflection part by the exposed part E by the light emitted from this total shape light controller. By adding a reflective position detecting means such as a two-dimensional image sensor such as a CCD capable of photographing a display screen as a position detecting means, this reflective position detecting means and the reflection by the exposed portion E of the capacitive touch panel substrate 10 By configuring optical non-contact instruction position detection means from the unit, it becomes possible to obtain a shooting game device. In addition, when infrared light is used for irradiation light, discrimination from visible light can be facilitated.

From the meaning of using the reflective conductive layer 5 as a reflective part, the low reflective layer 6 is rather good in that the reflective light intensity is increased to the end when not provided, but the reflective conductive layer 5 is exposed to light from the surrounding environment. It becomes easier to stand out. By the way, by making a configuration in which a part of the reflective conductive layer 5 is hidden by the low reflective layer 6, the basic electrical performance as the original electrical connection means of the reflective conductive layer 5 and the optical non-contact instruction position detection in the display screen Reflected light intensity as a component of the means, difficulty in remarkable reflection of the reflective conductive layer 5 as a display screen quality, ease of manufacture and cost related to the alignment accuracy of the reflective conductive layer 5 and the low reflective layer 6, etc. It becomes possible to more easily balance the design performance, thereby increasing the degree of freedom in design.

In addition, if the reflective part as one component of the optical non-contact indication position detection means is installed separately from the reflective conductive layer 5, the number of steps may increase and cost may be increased, but the exposure of the reflective conductive layer 5 By using the portion E as the reflecting portion, the reflecting portion is formed simultaneously from the same material as the reflective conductive layer 5, and can be provided without increasing the number of steps.

The application of the exposed portion E to the reflective portion as a component of such an optical non-contact instruction position detection means in the display screen is a screen centered on that portion by indicating an arbitrary position in the display screen, in addition to the use of game equipment. It can also be used as a controller to perform operations such as enlargement or reduction of For example, since the exposed portions E are regularly arranged, the exposed portions E can function as grid lines in the display screen.

In addition, in the above embodiment, the use of the function as a component of the optical non-contact indication position detection means is the use of the touch panel function and the use method that is used separately, so that the operator does not touch the display screen. In the application of a usage method in which both functions are used in combination, it is performed when in a position where the operator can reach the display screen.

〔Addition of decorative part 8 and combination of front protective plate for display device〕

As illustrated in FIG. 7, in the present invention, the capacitive touch panel substrate 10 may have a decorative portion 8 on the outer periphery of the position detection area Ap.

The decorative portion 8 is a touch panel including a capacitive touch panel substrate 10, and in a display device using the touch panel, a wiring 7 or a control circuit positioned at the outer periphery of the position detection area Ap The back is hidden from the viewer V of the display device or the operator of the touch panel so that the appearance is not damaged, and an arbitrary design is expressed.

The capacitive touch panel substrate 10 has a decorative portion 8 on the outer periphery of the position detection area Ap, so that a cover glass or the like in the conventional display device 200 illustrated in FIG. 11A It can function as the front protective plate 50 for a display device, and can be used together with the front protective plate 50 for a display device.

The capacitive touch panel substrate 10 having a structure in which the front protective plate 50 for a display device is also used may be referred to as a touch panel substrate with an integrated front protective plate for a display device. In this case, the side opposite to the side (one side, the first side S1) on which the first direction transparent electrode 2a and the second direction transparent electrode 2b of the light-transmitting substrate 1 are installed (the other side) , The second surface S2 functions as an input surface (touch surface, contact surface) of a touch panel on which an external conductor such as an operator's finger or the like contacts (or approaches) the touch panel sensor to perform position input.

When the capacitive touch panel substrate 10 is integrated by using the front surface protection plate 50 for a display device, the number of components can be reduced and the thickness can be reduced.

〔Identify the materials of the low-reflective layer 6 and the decorative part 8〕

In the form in which the capacitive touch panel substrate 10 also has a decorative portion 8, when the decorative portion 8 has a component having the same low-reflectivity and light-shielding properties as the low-reflective layer 6, the low-reflective layer ( 6) can be formed of the same material as the decorative part 8. Further, the low reflection layer 6 is preferably formed of the same material as the decorative portion 8. By forming the low-reflective layer 6 from the same material as the decorative portion 8, the low-reflective layer 6 can be provided without increasing the number of steps in the same process as the decorative portion 8, so that the reflective conductive layer 5 is formed. This is because it is possible to realize a structure that is not conspicuous without incurring cost. Of course, in this case, since the low-reflection layer 6 and the decorative portion 8 are formed on the same surface of the light-transmitting substrate 1 (see Fig. 7(c)), they can be formed simultaneously in the same process. 7(c) shows an example in which the low-reflective layer 6 of the form of FIG. 1 is formed simultaneously with the decorative part 8, but the low-reflective layer 6 of another form is It may be formed simultaneously.

In order to hide the wiring 7 and the like, the decorative portion 8 has at least a light-shielding layer 8a having light-shielding properties, but it usually also has an infrared transmission window 8b or the like. The infrared transmission window 8b detects the approach of the skin from the viewpoint of preventing malfunction of the touch panel when the mobile phone is held to the ear during a call, and from the viewpoint of extending the battery life by removing the display on the display panel. It is installed on the part of the infrared sensor that is installed as a human body detection sensor.

Constituent elements of the decorative portion 8 formed of the same material as the low-reflective layer 6 include, for example, a light-shielding layer 8a and an infrared transmitting layer 8bL formed on a portion of the infrared transmitting window 8b. .

[Light shielding layer 8a]

The light-shielding property of the light-shielding layer 8a varies depending on the desired specification and expression color, but in terms of transmittance, it is 3% or less (in terms of optical density (OD) 1.5 or more), more preferably 1% or less in terms of transmittance (optical density ( OD) 2.0 or more), more preferably 0.01% or less (optical concentration (OD) 4.0 or more) in terms of transmittance. This is because if the transmittance exceeds the above, parts to be hidden may be seen.

The light shielding layer 8a can be formed by a known material and forming method. For example, the light-shielding layer 8a can be formed from a layer containing a colored pigment in a resin binder made of a cured product of a curable resin. As the curable resin, a photosensitive resin such as an ultraviolet curable acrylic resin can be used.

As the color pigment used for the light-shielding layer 8a, what is necessary is just to use a pigment according to the color expressed in the light-shielding layer 8a, and there is no particular limitation on it. For example, as a coloring pigment, a black pigment, a white pigment, a red pigment, a yellow pigment, a blue pigment, a green pigment, a purple pigment, etc. can be used. A colored pigment may be used individually by 1 type, and may use multiple types of color pigments of the same type or different colors.

The color of the light-shielding layer 8a when formed of the same material as the low reflection layer 6 is not a reflective color such as white, but a dark color such as black. In addition, black is one type of color preferable also as the design color expressed by the decoration part 8.

[Infrared transmission window (8b)]

As illustrated in FIGS. 7A and 7B, a portion of the decorative portion 8 as an infrared transmission window 8b that exhibits light-shielding properties for visible light and transmittance for infrared light. In some cases, the infrared transmission layer 8bL is provided. When the light-shielding layer 8a is black, when carbon black is used as a black pigment, it becomes light-shielding not only for visible light but also for infrared light, so that the material is different from that of the light-shielding layer 8a. ) Is sometimes required.

The transmittance of the infrared transmission window 8b to infrared light varies depending on the desired specification, expression color, and infrared components such as an infrared sensor applied to the infrared transmission window 8b. However, as an example, the transmittance in the infrared region is It may be 70% or more. The infrared region having the transmittance of 70% or more does not necessarily need to be a region of 780 nm or more, and can function sufficiently if it is, for example, a region of 850 nm or more. In addition, the upper limit of the infrared region with a transmittance of 70% or more may satisfy the near-infrared region, usually up to 1300 nm.

The light-shielding property of the infrared-transmitting window 8b against visible light varies depending on the desired specification and expression color, but since the infrared-transmitting window 8b is usually small in a spot, it is always necessary to use the infrared-transmitting window 8b and the light-shielding layer. It is not necessary to match the level of light-shielding property of (8a). For this reason, the light-shielding property of the infrared transmission window 8b against visible light, as an example, is 50% or less in terms of transmittance (0.2 or more in optical density (OD)), more preferably 25% or less in terms of transmittance (optical Concentration (OD) 0.6 or more), more preferably 10% or less (optical concentration (OD) 1.0 or more) in terms of transmittance.

In this way, the infrared transmission window 8b has, for example, a transmittance of 70% or more at a wavelength of 850 nm or more and 1300 nm or less in an infrared region and a transmittance of 10% or less in the visible region. In addition, this transmittance is not an average value, but a value for each wavelength.

(Infrared transmission layer (8bL))

The infrared transmission layer 8bL is usually formed in a color similar to that of the light-shielding layer 8a in order to make the existence of the infrared transmission window 8b inconspicuous. In addition, the infrared transmitting layer 8bL exhibits light-shielding property for visible light and transmittance for infrared light.

The color of the infrared transmission layer 8bL when formed of the same material as the low reflection layer 6 is not a reflective color such as white, but a dark color such as black. In addition, black is one type of color preferable also as the design color expressed by the decoration part 8.

The infrared transmission layer 8bL does not contain a black pigment such as carbon black, but contains plural kinds of chromatic color pigments having different colors, for example, red, yellow, and blue, thereby expressing a dark color such as black. Can be formed.

By forming the low reflection layer 6 from the same material as the infrared transmission layer 8bL, the low reflection layer 6 can be installed without increasing the number of steps in the same process as the infrared transmission layer 8bL of the decorative portion 8. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without incurring cost.

In addition, when the wiring 7 is also provided, in order to hide the wiring 7 from the light shielding layer 8a, the formation order of the light shielding layer 8a and the wiring 7 on the light-transmitting substrate 1 is a capacitive touch When the panel substrate 10 is used, the direction of the front and back to the observer V or the operator is regulated, but in the case of the infrared transmission layer 8bL in which the wiring 7 does not overlap, the infrared transmission layer 8bL and the wiring ( The order of formation of the light-transmitting substrate 1 of 7) is not subject to the same restrictions as in the case of the light-shielding layer 8a. For example, (a) after forming the low-reflection layer 6 and the light-shielding layer 8a at the same time, after forming the wiring 7 on the light-shielding layer 8a, the infrared transmission window 8b of the light-shielding layer 8a Infrared transmission layer 8bL is formed on the portion of or, on the contrary, (b) low reflection layer 6 and light blocking layer 8a are simultaneously formed, and then the infrared transmission window 8b of the light blocking layer 8a After forming the infrared transmission layer 8bL in the portion of, the wiring 7 can be formed on the light-shielding layer 8a. In this respect, in the form in which the low reflection layer 6 is formed of the same material as the infrared transmission layer 8bL, it has an advantage that the degree of freedom in product design is not impaired.

[Overcoat layer (9)]

The capacitive touch panel substrate 10 may include a transparent overcoat layer 9 as illustrated in FIG. 8. In the same drawing, the overcoat layer 9 is an example of a form in which the overcoat layer 9 is formed as an uppermost layer on the surface of the first surface S1 which is one surface of the translucent substrate 1. In the same drawing, the overcoat layer 9 is added to the form of Fig. 1, but the overcoat layer 9 may be added to other forms. The overcoat layer 9 can improve the reliability.

For the overcoat layer 9, known materials and forming methods can be employed. For example, the overcoat layer 9 is preferably a transparent resin, and also a curable resin in terms of heat resistance, and a thermosetting epoxy resin, an ultraviolet curable acrylic resin, or the like can be used. In the case of forming a pattern, it can be formed by a photolithography method.

[C] display device:

A display device according to the present invention is a display device including at least a display panel and the above-described capacitive touch panel substrate 10 disposed on the observer side of the display panel. Hereinafter, two representative embodiments will be described as an example.

<< first embodiment >>

The display device 100 according to the present invention illustrated in FIG. 9 includes a display panel 40 and the capacitive touch panel substrate 10 described above on the observer V side of the display panel 40. It is a configuration example including the touch panel 30 to be described and the front surface protection plate 50 for a display device such as a cover glass in at least this order.

Typical examples of the display panel 40 are a liquid crystal display panel and an electroluminescent (EL) panel. In addition, an electronic paper panel, a display device using a CRT may be used, or various known display panels may be used.

The touch panel 30 includes the capacitive touch panel substrate 10 and also includes known necessary components such as a control circuit and a connector for realizing the touch panel function.

In this configuration, since the front protective plate 50 for a display device separate from the touch panel 30 is provided, the capacitive touch panel substrate 10 has a low-reflective layer with respect to the reflective conductive layer 5. 6) Any configuration arranged in the direction closer to the observer (V) is sufficient. That is, whichever of the reflective conductive layer 5 and the low-reflective layer 6 is located at a position far from the light-transmitting substrate 1 in the thickness direction may be used, and the first surface of the light-transmitting substrate 1 The surface S1 can be arranged in a direction facing the front side as well as the direction facing the back side.

As the front protective plate 50 for a display device, a known one can be employed. For example, a glass plate such as chemically strengthened glass and a resin plate such as acrylic resin are used as a transparent substrate, and the central portion of the substrate is used as a display area. , It is possible to adopt an opaque decorative portion 8 on the outer periphery of this display area decorated with an arbitrary color and pattern such as black.

As the front protective plate 50 for a display device, when the touch panel 30 including the capacitive touch panel substrate 10 includes the decorative portion 8 on the outer periphery of the position detection area Ap, The decorative portion 8 may be omitted.

By setting it as such a structure, the connection part between transparent electrode units in the capacitive touch panel substrate 10 provided in the touch panel 30 can be made into a display device that is less pronounced.

<< 2nd embodiment >>

In the display device 100 according to the present invention illustrated in FIG. 10, a display panel 40 and a front protective plate 50 for a display device such as a cover glass are also used on the observer side of the display panel 40. This is a configuration example including at least a touch panel 30 including the above-described capacitive touch panel substrate 10.

By setting it as such a structure, in addition to the effect of the structure of FIG. 9, the number of parts can be reduced and the effect of thickness reduction can be obtained.

In addition, the wiring 7 and the reflective conductive layer 5 formed on the decorative portion 8 are made of the same material, or the low-reflective layer 6 is made of the same material as the decorative portion 8, or in one form, the same material is used. Since the layers to be formed can be provided without increasing the number of steps in the same step, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without incurring cost.

《Interposition of resin layers such as adhesive sheets》

For example, in the display device 100 according to the embodiment illustrated in FIG. 8, between the touch panel 30 including the capacitive touch panel substrate 10 and the display panel 40, and the touch panel Although the structure has a void and an air layer exists between 30 and the front protective plate 50 for a display device, in the display device 100 of this invention, the adhesive layer etc. All of them may be embedded with a known resin layer. By reducing light reflection on the member surface by the resin layer, the display can be made easier to see.

[D] Use:

The use of the capacitive touch panel substrate 10 and the display device 100 according to the present invention is not particularly limited. For example, mobile phones such as smart phones, portable information terminals such as tablet PCs, personal computers, car navigation systems, digital cameras, electronic notebooks, game machines, automatic ticket machines, ATM terminals, POS terminals, and the like.

Claims (10)

A light-transmitting substrate having a first surface and a second surface opposite to the first surface,
A plurality of first direction transparent electrode units arranged in a first direction on one of the first and second surfaces of the light-transmitting substrate,
A first direction connecting portion formed on the same surface of the first direction transparent electrode unit and of the same material as the first direction transparent electrode unit, and connecting the first direction transparent electrode units;
A second direction formed on the same surface of the first direction transparent electrode unit and of the same material as the first direction transparent electrode unit and between the first direction transparent electrode units and between the first direction connection portions, and crosses the first direction A plurality of second direction transparent electrode units arranged in,
A second direction connecting portion that connects the second direction transparent electrode units to each other, is insulated from the first direction connecting portion through an insulating layer, and includes a reflective conductive layer,
The International Illumination Committee (CIE) exhibits low reflectivity in which the Y value in the Yxy color system using the standard light source (C) is 10% or less, and when observed from a direction perpendicular to the one side of the translucent substrate, the above A low reflection layer overlapping at least a part of the reflective conductive layer, and a low reflection layer separate from the insulating layer
Have,
The first direction transparent electrode unit and the second direction transparent electrode unit is an outer circumferential portion of a position detection region arranged, and on the one side of the light-transmitting substrate, having a decorative portion,
The decorative portion has an infrared transmission layer forming an infrared transmission window exhibiting transmittance to infrared light,
The low reflection layer is formed of the same material as the infrared transmission layer of the decorative portion,
The low-reflective layer is formed on the side of the light-transmitting substrate with respect to the first direction connecting portion and the reflective conductive layer in the thickness direction. The capacitive touch panel substrate according to claim 1, wherein an area of a portion where the low-reflective layer and the reflective conductive layer overlap is 30% or more of an area of the reflective conductive layer. The capacitance according to claim 1 or 2, wherein an outer contour shape of the low-reflective layer when viewed from a direction perpendicular to the one surface of the light-transmitting substrate includes an outer contour shape of the reflective conductive layer inside. Type touch panel board. The method according to claim 1 or 2, wherein the first direction transparent electrode unit and the second direction transparent electrode unit are arranged at an outer periphery of a position detection area and have a wiring on the one side of the light-transmitting substrate,
The capacitive touch panel substrate, wherein the reflective conductive layer is formed of the same material as the wiring. The capacitive touch panel substrate according to claim 1 or 2, wherein the low-reflective layer is formed between the reflective conductive layer and the translucent substrate. The capacitive touch panel substrate according to claim 1 or 2, wherein a surface of the light-transmitting substrate opposite to the one surface functions as an input surface of the touch panel. A light-transmitting substrate having a first surface and a second surface opposite to the first surface,
A plurality of first direction transparent electrode units arranged in a first direction on one of the first and second surfaces of the light-transmitting substrate,
A first direction connecting portion formed on the same surface of the first direction transparent electrode unit and of the same material as the first direction transparent electrode unit, and connecting the first direction transparent electrode units;
A second direction formed on the same surface of the first direction transparent electrode unit and of the same material as the first direction transparent electrode unit and between the first direction transparent electrode units and between the first direction connection portions, and crosses the first direction A plurality of second direction transparent electrode units arranged in,
A second direction connecting portion that connects the second direction transparent electrode units to each other, is insulated from the first direction connecting portion through an insulating layer, and includes a reflective conductive layer,
The International Illumination Committee (CIE) exhibits low reflectivity in which the Y value in the Yxy color system using the standard light source (C) is 10% or less, and when observed from a direction perpendicular to the one side of the translucent substrate, the above A low reflection layer overlapping at least a part of the reflective conductive layer, and a low reflection layer separate from the insulating layer
Have,
The first direction transparent electrode unit and the second direction transparent electrode unit is an outer circumferential portion of the position detection region in which the arrangement, and on the one side of the light-transmitting substrate, has a decorative portion,
The decorative portion has an infrared transmission layer forming an infrared transmission window exhibiting transmittance to infrared light,
The low reflection layer is formed of the same material as the infrared transmission layer of the decorative portion,
The low-reflective layer is formed on a side farther from the light-transmitting substrate than the first connection portion and the reflective conductive layer in the thickness direction. A display panel,
A display device comprising the capacitive touch panel substrate according to any one of claims 1, 2, and 7 disposed on the observer side of the display panel. delete delete

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