JP2015084238A - Capacitive touch panel substrate and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitive touch panel substrate in which a connecting part between transparent electrode units arrayed in two directions crossing each other is made substantially invisible.SOLUTION: A capacitive touch panel substrate 10 includes a translucent substrate 1, a plurality of first-direction transparent electrode units 2a disposed on one surface of the translucent substrate 1, a first-direction connection part 3a for connecting the first-direction transparent electrode units 2a, a plurality of second-direction transparent electrode units 2b disposed on the same surface as the first-direction transparent electrode units 2a, a second-direction connection part 3b for connecting the second-direction transparent electrode units 2b, and a low reflective layer 6. The second-direction connection part 3b is insulated from the first-direction connection part 3a by an insulating layer 4 and includes a reflective conductive layer 5. The low reflective layer 6 shows low reflectivity in which a Y value is 10% or less in a Yxy color system using a standard light source C, and at least partially overlaps the reflective conductive layer 5 when viewed from a direction perpendicular to the one surface of the translucent substrate 1.

Description

  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 not conspicuous, and a display device including the same.

  In recent years, touch panels have been rapidly spread as position input devices used in combination with display panels in various display devices such as smartphones and tablet PCs (personal computers). Various types of touch panels, such as electromagnetic induction type and resistive film type, have been known for a long time, and they have been used for various purposes. Among them, multi-touch (multi-point simultaneous input) has attracted particular attention recently. This is a capacitive touch panel capable of

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

  FIG. 11B is a partially enlarged plan view focusing on the transparent electrode unit of the conventional capacitive touch panel substrate 20 in FIG. 11A, and FIG. 11C is the view in FIG. It is the elements on larger scale which paid its attention to the connection part between transparent electrode units. FIG. 12 is a partial enlarged cross-sectional view of the connection portion taken along line CC in FIG.

  In general, in the capacitive touch panel substrate 20, as shown in FIGS. 11 (b) and 11 (c), first direction transparent electrode units 2a arranged in the Y direction which is the vertical direction in the drawing, and left and right in the drawing. 2nd direction transparent electrode unit 2b arranged in the X direction which is a direction. 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 in which the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b are formed on the same surface side of the translucent substrate 1 (Patent Literature). 1). This form has an advantage that the relative positional accuracy between the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b can be improved.

  That is, the conventional capacitive touch panel substrate 20 illustrated in the above drawing is transparent in the first direction arranged in the first direction (Y direction in the drawing) on the surface of the first surface S1 of the translucent substrate 1. The electrode unit 2a, the first direction transparent electrode unit 2a, formed of the same material and on the same surface, the first direction connection part 3a connecting the first direction transparent electrode units 2a to each other, and the first direction transparent electrode unit 2a A second direction (drawing) that is formed of the same material on the same surface, is located between the first direction transparent electrode units 2a and is located between the first direction connection portions 3a and intersects the first direction (Y direction). The second direction transparent electrode units 2b arranged in the X direction) and the second direction transparent electrode units 2b are connected to each other, and the second direction connection is insulated from the first direction connection portion 3a via the insulating layer 4. Part 3b.

  At this time, the second direction connecting portion 3b can be formed of the same material as the second direction transparent electrode unit 2b in the same manner as the first direction connecting portion 3a in that transparency can be obtained. A metal that is provided on the outer periphery of the position detection region in which the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b are arranged as a form that can reduce the cost by utilizing the fact that the area is smaller than the unit. A form in which the wiring 7 made of material and the same material are simultaneously formed is known (see Patent Document 1).

  That is, as shown in the sectional view of FIG. 12, the second direction connecting portion 3b is composed 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 exhibits silver metallic reflectivity.

  Even if the second direction connection portion 3b is formed of the same material as the second direction transparent electrode unit 2b, the second direction connection portion 3b is formed simultaneously with the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b due to the provision of the insulating layer 4. This is not possible and requires an additional step. However, if the second direction connecting portion 3b is formed simultaneously with the same material as the wiring 7 in the outer peripheral portion of the position detection region, the number of steps can be reduced accordingly.

JP 2011-86122 A

  However, as shown in the cross-sectional view of FIG. 12, when the second direction connecting portion 3b is formed of the reflective conductive layer 5, unlike the transparent electrode, the second direction connecting portion 3b is reflected when exposed to the light L. May end up. The phenomenon in which the reflective conductive layer 5 becomes conspicuous is conspicuous because the smaller the size of the touch panel, the closer the distance from the eyes of the observer who sees the display panel through the touch panel or the operator of the touch panel. Tend to be.

  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 hardly noticeable. Moreover, it is providing a display apparatus provided with this.

A capacitive touch panel substrate according to the present invention has a first surface and a translucent substrate having a second surface opposite to the first surface;
A plurality of first direction transparent electrode units arranged in a first direction on either one of the first surface and the second surface of the translucent substrate;
A first direction connecting portion that is formed on the same surface with the same material as the first direction transparent electrode unit and connects the first direction transparent electrode units;
The first direction transparent electrode unit is formed of the same material and on the same surface, is located between the first direction transparent electrode units and is located between the first direction connection portions, and intersects the first direction. A plurality of second direction transparent electrode units arranged in a second direction;
The second direction transparent electrode units are connected to each other, the second direction connection part is insulated from the first direction connection part via an insulating layer, and includes a reflective conductive layer;
Observation from a direction perpendicular to the one surface of the translucent substrate, showing low reflectivity by the International Illumination Commission CIE with a Y value of 10% or less in the Yxy color system using the standard light source C A low reflective layer overlapping at least a portion of the reflective conductive layer,
Have

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

  In the capacitive touch panel substrate according to the present invention, an outer contour shape of the low reflective layer when observed from a direction perpendicular to the one surface of the translucent substrate is an outer contour shape of the reflective conductive layer. May be included inside.

  In the capacitive touch panel substrate according to the present invention, the outer peripheral portion of the position detection region in which the first direction transparent electrode unit and the second direction transparent electrode unit are arranged on the one surface of the translucent substrate The decorative portion may be provided, and the low reflective layer may be formed of the same material as the decorative portion.

  In the capacitive touch panel substrate according to the present invention, the outer peripheral portion of the position detection region in which the first direction transparent electrode unit and the second direction transparent electrode unit are arranged on the one surface of the translucent substrate The wiring may have a wiring, and the reflective conductive layer may be made 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 light transmissive substrate side 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 translucent substrate.

  In the capacitive touch panel substrate according to the present invention, a surface opposite to the one surface of the translucent substrate 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 translucent substrate than the reflective conductive layer in the thickness direction. Good.

  In addition, a display device according to the present invention includes a display panel and the aforementioned capacitive touch panel substrate disposed on the viewer side of the display panel.

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

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

FIG. 1A is a schematic plan view for explaining one embodiment (pre-formed connection portion) of a capacitive touch panel substrate according to the present invention, and FIG. 1B is a diagram in FIG. It is a partial expanded sectional view of the connection part in the CC line. FIG. 2A is a schematic plan view for explaining another embodiment (post-formed connection portion) of the capacitive touch panel substrate according to the present invention, and FIG. 2B is a plan view of FIG. It is the elements on larger scale of the connection part in the CC line in the inside. FIG. 3A is a schematic plan view for explaining another embodiment (preformed connection portion, through-hole connection) of the capacitive touch panel substrate according to the present invention, and FIG. It is the elements on larger scale of the connection part in the CC line in 3 (a). FIG. 4A is a schematic plan view for explaining another embodiment of the capacitive touch panel substrate according to the present invention (post-formed connection portion, through-hole connection), and FIG. It is the elements on larger scale of the connection part in the CC line in 4 (a). FIG. 5A is a schematic plan view for explaining another embodiment of the capacitive touch panel substrate according to the present invention (the reflective conductive layer is partially exposed from the low reflective layer), and FIG. ) Is a partial enlarged cross-sectional view of a connection portion taken along line CC in FIG. FIGS. 6A and 6B are plan views for explaining examples of the state of exposure of the reflective conductive layer in the form of FIG. Fig.7 (a) is a top view explaining another embodiment (The low reflection layer is the same material as a decorating part) of the capacitive touch panel board | substrate by this invention, FIG.7 (b) is infrared. FIG. 7C is a partial enlarged cross-sectional view showing a portion of the transmission window, and FIG. 7C is a partial enlarged cross-sectional view of the connection portion corresponding to FIG. FIG. 8 is a partially enlarged 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. FIG. 9 is a cross-sectional view illustrating an embodiment of a display device according to the present invention. FIG. 10 is a cross-sectional view illustrating another embodiment of the 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. FIG. 11B is a partially enlarged plan view showing an example of the transparent electrode unit of the capacitive touch panel substrate, and FIG. 11C is a partially enlarged plan view showing an example of the connecting portion between the transparent electrode units. FIG. 12 is a partial enlarged cross-sectional view of the connection portion taken along line CC in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the drawings are conceptual diagrams, and the scale relations, aspect ratios, and the like of components may be exaggerated as appropriate for convenience of explanation.

[A] Definition of terms:
Hereinafter, definitions of main terms used in the present invention will be described here.

  The “front side” is a side where display light is emitted from the display panel 40 when the capacitive touch panel substrate 10 is used in combination with the display panel 40 in the capacitive touch panel substrate 10 or other components. Yes, it means the side of the observer who observes the display on the display panel 40.

  In addition, the “front side” means a side of an 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 a side opposite to the “front side”, and means a side where the display light of the display panel 40 enters in the capacitive touch panel substrate 10 or other components.

  Any one of the “first surface” and the “second surface” is the “front side”, and which surface is the “front side” is arbitrary.

  In the “first surface” and the “second surface”, which surface is “one surface” and which surface is the “other surface” is arbitrary.

  However, in this specification, the surface on which the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b are provided is referred to as “one surface”. Whether this “one surface” is the “front side” or the “back side” depends on the usage related to the layer configuration of the capacitive touch panel substrate 10. The capacitive touch panel substrate 10 is used such that the low reflective layer 6 is on the front side with respect to the reflective conductive layer 5.

  In the present specification, a mode in which the “one side” is used as the “back side” will be mainly described, and a mode in which the “one side” is used as the “front side” will also be 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: Preformed Connection Portion >>
FIG. 1A is a schematic plan view of a first embodiment of a capacitive touch panel substrate 10 according to the present invention, and FIG. 1B is a cross-sectional view taken along the line CC in FIG. It is a partial expanded sectional view.

  This embodiment is a form of a structure obtained by forming the 1st direction transparent electrode unit 2a and the 2nd direction transparent electrode unit 2b after forming the 2nd direction connection part 3b previously.

The capacitive touch panel substrate 10 of the embodiment shown in FIG.
A translucent substrate 1;
A plurality of first direction transparent electrode units 2a arranged in the first direction on one surface of the translucent substrate 1,
A first direction connecting portion 3a that is formed on the same surface with the same material as the first direction transparent electrode unit 2a and connects the first direction transparent electrode units 2a;
The first direction transparent electrode unit 2a is formed of the same material and on the same surface, is located between the first direction transparent electrode unit 2a and is located between the first direction connection portions 3a and intersects the first direction. A plurality of second direction transparent electrode units 2b arranged in two directions;
The second direction transparent electrode units 2b are connected to each other, the second direction connection part 3b including the reflective conductive layer 5 insulated from the first direction connection part 2a via the insulating layer 4;
1st surface S1 which shows the low reflectivity in which Y value in the Yxy color system using the standard light source C is 10% or less by the International Commission on Illumination CIE and which is the one surface of the translucent substrate 1 When viewed from a direction perpendicular to the reflective conductive layer 5, it overlaps at least a part of the reflective conductive layer 5.

  In addition, in the present embodiment, the overlap between the reflective conductive layer 5 and the low reflective layer 6 is observed from a direction perpendicular to the first surface S1, which is the one surface of the translucent substrate 1. The outer contour shape of the low reflective layer 6 is overlapped so as to include the outer contour shape of the reflective conductive layer 5 inside. In other words, the low reflective layer 6 overlaps 100% of the area of the reflective conductive layer 5, that is, the entire region.

  In the present embodiment, the first surface S1 which is one surface of the translucent substrate 1 is a surface above the drawing in the cross-sectional view of FIG. Therefore, it is assumed that the capacitive touch panel substrate 10 is used in this cross-sectional view with the second surface S2 on the lower side of the drawing as the front side toward the viewer V of the display panel who is also the operator of the touch panel. It is a form.

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

  In the present invention, the first direction and the second direction intersecting with each other are not necessarily orthogonal to each other.

  The schematic plan view of FIG. 1A shows a plurality of first direction transparent electrode units 2a arranged in the first direction and a plurality of second direction transparents arranged in the second direction within the position detection region Ap. Not all of the electrode units 2b are drawn. Focusing on the portion of the second direction connecting portion 3b that connects the second direction transparent electrode units 2b, only one second direction connecting portion 3b and its periphery are depicted as representatives. Further, only one wiring 7 formed on the outer periphery of the position detection region Ap is schematically drawn as being connected to the first direction transparent electrode unit 2a, and is connected to the second direction transparent electrode unit 2b. Illustration of the wiring 7 is omitted.

  In the figure, the first direction transparent electrode extended portion 7a, which is simultaneously patterned on the same surface with the same material as the first direction transparent electrode unit 2a so as to overlap and connect to the wiring 7 in the outer peripheral portion of the position detection region Ap. Is provided on the outer periphery of the position detection area Ap.

  FIG. 1A is a plan view of the capacitive touch panel substrate 10 as viewed from the “back side” on the side where the reflective conductive layer 5, the low reflective layer 6 and the like are formed. In FIG. 1A, the insulating layer 4, the reflective conductive layer 5 and the low reflective layer 6 formed on the other side of the transparent layer such as the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b are provided. If the transparent layer is opaque, the layer is originally hidden, so that it is drawn with a broken line. However, the display with broken lines is only for easy understanding, and does not accurately represent the layered positional relationship.

  Between the plan view of FIG. 1 (a) and the partially enlarged sectional view of FIG. 1 (b), the size relationship between the respective components such as the left and right directions in the drawing is not maintained.

  The same applies to the drawings in other embodiments according to the present invention.

  In the present embodiment, the low reflection layer 6 has an outer contour shape when observed from a direction perpendicular to the first surface S1 which is the one surface of the translucent substrate 1. The outline shape may be included on the inside, and the same shape may be completely overlapped.

  In the present embodiment shown in FIG. 1, the outer contour shape of the low reflective 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 reflective layer 6 is larger than the outer contour shape of the reflective conductive layer 5. In addition, the outer contour shape of the low reflective layer 6 protrudes outward with respect to the outer contour shape of the reflective conductive layer 5 around the entire periphery thereof. In the present 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 means that the alignment accuracy has some allowance, and the outer contour shape of the reflective conductive layer 5 is 0.5 μm or more, preferably 1 μm or more on the entire outer periphery. More preferably, it is 2 μm or more, more preferably 4 μm or more, and it is preferable to have a large shape protruding. However, even if it protrudes, it is preferably 100 μm or less, preferably 30 μm or less, more preferably 10 μm or less. This is because if the protrusion is too large, the display of the display panel viewed through the touch panel is blocked by the low reflective layer 6 and the display quality may be adversely affected.

  In the present embodiment, the low reflective layer 6 is, in the thickness direction, the side of the transparent substrate 1 with respect to the reflective conductive layer 5, more specifically, the reflective conductive layer 5 and the transparent substrate 1. It is the form formed between.

  However, in the present invention, the “translucent substrate 1 side with respect to the reflective conductive layer 5” means that the low reflective layer 6 is on the other surface of the translucent substrate 1, that is, the second surface S2. The form formed is also included. In short, in the capacitive touch panel substrate 10 of the present invention, the operator who operates the touch panel using the capacitive touch panel substrate 10, which is the display panel 40 to which the capacitive touch panel substrate 10 is applied. Although it is also the observer V to observe, this observer V is set as the structure which has the low reflection layer 6 in the near side from the reflective conductive layer 5. FIG.

[Material and forming method]
[Translucent substrate 1]
A known material can be used for the translucent substrate 1 and is typically a glass plate, but may be a resin material such as a polyester resin.

[First Direction Transparent Electrode Unit 2a, Second Direction Transparent Electrode Unit 2b, and First Direction Connection Portion 3a]
For the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection portion 3a, a known material and a forming method can be adopted. For example, a transparent conductive thin film such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), AZO (Aluminum Zinc Oxide) or the like is patterned by a photolithography method or the like. What was formed can be used.

[Second direction connecting portion 3b and reflective conductive layer 5]
The second direction connection portion 3 b includes at least the reflective conductive layer 5.

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

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

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

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

  The dimensions of the outer 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 the present embodiment shown in FIG. The width is a dimension in the first direction (Y direction in the drawing), and the length is a dimension in the second direction (X direction in the drawing).

  In addition to the reflective conductive layer 5, the second direction connection portion 3 b further includes a transparent conductive thin film such as ITO described above, and the transparent conductive thin film is laminated so as to be connected to the reflective conductive layer 5. It may be a structured.

[Insulating 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, for example, a photolithography method using an ultraviolet curable acrylic resin as a resin layer.

  Note that in this specification, “insulation” and “connect” are both used in terms of electrical meaning.

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

[Low reflective layer 6]
The low reflection layer 6 is a layer exhibiting low reflectivity with a Y value in the Yxy color system according to JIS-Z8701 using the standard light source C by the International Commission on Illumination CIE of 10% or less. Of course, the measurement is performed from the side where the surface farther from the reflective conductive layer 5 out of the two layer surfaces of the low reflective layer 6 is observed. The low reflective layer 6 also exhibits light shielding (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 “hidden layer” that exhibits low reflectivity and light shielding properties and conceals the reflective conductive layer 5. The low reflective 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 (1 or more at the optical density OD) in terms of transmittance, more preferably 1% or less (optical). Density OD2.0 or more), and more preferably 0.01% or less (optical density OD4.0 or more) in terms of transmittance.

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

  In order to make the low reflection layer 6 dark, such as black, a layer that exhibits black using a plurality of chromatic pigments such as red, yellow, blue, and green other than carbon black may be used. For example, black may be formed using three color pigments of red, yellow, and blue. The dark color means a color other than black, such as dark blue or dark green, which has a low lightness and the Y is 10% or less.

  Therefore, as a color pigment used for the low reflection layer 6, one or more kinds such as 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 reflective layer 6 may be formed of an inorganic material that itself exhibits a dark color, such as chromium oxynitride.

  The low reflective layer 6 is preferably electrically insulating. This is because, if the low reflection layer 6 is conductive, it is difficult to ensure the insulation of the portion that requires insulation depending on the combination of the layer configuration and the pattern shape. For example, although there is no problem in the present embodiment shown in FIG. 1, it is difficult to ensure insulation between the second direction transparent electrode unit 2b and the first direction connection portion 3a in the second embodiment of FIG. .

[Wiring 7]
A known material and formation method can be used for the wiring 7. For example, the wiring 7 can be made of metal (including alloys thereof) such as silver, gold, copper, chromium, platinum, aluminum, palladium, and molybdenum. For example, a metal layer of an alloy (also referred to as APC) made of silver, palladium, and copper, which is formed by sputtering and then patterned by photolithography, can be used.

  In the present embodiment, the wiring 7 is formed as a metal layer by 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 the same surface, specifically, the first surface that is one surface of the translucent substrate 1. It is formed simultaneously with S1.

[Production method]
The capacitive touch panel substrate 10 as described above can be manufactured as follows.

  First, the low reflection layer 6 is formed on the first surface S <b> 1 that is one surface of the translucent substrate 1. Next, the reflective conductive layer 5 as the second direction connecting portion 3b and the wiring 7 are simultaneously patterned with the same material. Next, the insulating layer 4 is patterned. Next, the 1st direction transparent electrode unit 2a, the 2nd direction transparent electrode unit 2b, and the 1st direction connection part 3a are pattern-formed simultaneously with the same material. In this way, the capacitive touch panel substrate 10 can be manufactured.

[Effect in this embodiment]
With the configuration as described above, in the capacitive touch panel substrate 10 in the present embodiment, the low reflective layer 6 hides all of the reflective conductive layer 5 used in the connection portion between the transparent electrode units. Since it has a structure, it is possible to effectively make the connection portion inconspicuous.

  In addition, in the present embodiment, the reflective conductive layer 5 is formed of the same material as the wiring 7, so the reflective conductive layer 5 is provided in the same process as the wiring 7 without increasing the number of processes. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without cost.

<< 2nd Embodiment: Post-forming connection part >>
FIG. 2A is a schematic plan view of a second embodiment of the capacitive touch panel substrate 10 according to the present invention, and FIG. 2B is a cross-sectional view taken along the line CC in FIG. It is a partial expanded sectional view.

  This embodiment is a form of the structure obtained by forming the 2nd direction connection part 3b after forming the 1st direction transparent electrode unit 2a and the 2nd direction transparent electrode unit 2b previously.

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

a) The order of the formation of the reflective conductive layer 5 and the wiring 7 and the formation of the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection portion 3a are reversed. . (In other words, the positional relationship between the front and back layers through the insulating layer 4 is reversed.)
b) According to the above a), the order of the 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 portion 3a are reversed. In addition, the order of the formation of the insulating layer 4 and the formation of the reflective conductive layer 5 and the wiring 7 are reversed.

[Production method]
The capacitive touch panel substrate 10 as described above can be manufactured as follows.

  First, the low reflection layer 6 is formed on the first surface S <b> 1 that is one surface of the translucent substrate 1. Next, the 1st direction transparent electrode unit 2a, the 2nd direction transparent electrode unit 2b, and the 1st direction connection part 3a are pattern-formed simultaneously with the same material. Next, the insulating layer 4 is patterned. Next, the reflective conductive layer 5 as the second direction connecting portion 3b and the wiring 7 are simultaneously patterned with the same material. In this way, the capacitive touch panel substrate 10 can be manufactured.

[Materials for Reflective Conductive Layer 5 and Wiring 7]
In the present embodiment, the pattern formation of the reflective conductive layer 5 and the wiring 7 is performed after the simultaneous pattern formation for the first direction transparent electrode unit 2a, the second direction transparent electrode unit 2b, and the first direction connection portion 3a. Therefore, the material of the reflective conductive layer 5 and the wiring 7 is also advantageous in that it is not necessary to consider the resistance to the etching solution when forming the pattern such as the first direction transparent electrode unit 2a.

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

[Effect in this embodiment]
Even in the configuration as described above, in the capacitive touch panel substrate 10 in the present embodiment, the low reflective layer 6 hides all of the reflective conductive layer 5 used in the connection portion between the transparent electrode units. Since it has a structure, it is possible to effectively make the connection portion inconspicuous.

  In addition, in the present embodiment, the reflective conductive layer 5 is formed of the same material as the wiring 7, so the reflective conductive layer 5 is provided in the same process as the wiring 7 without increasing the number of processes. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without cost.

<< Third embodiment: Pre-formed connection part, through-hole connection >>
FIG. 3A is a schematic plan view of a third embodiment of the capacitive touch panel substrate 10 according to the present invention, and FIG. 3B is a cross-sectional view taken along the line CC in FIG. It is a partial expanded sectional view.

  In the present embodiment, the second direction connecting portion 3b is formed first, and then the insulating layer 4 having the through holes 4h is formed over the entire position detection region Ap. Next, the first direction transparent electrode unit 2a and This is a structure obtained by forming 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.

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

a) Although the insulating layer 4 is formed not only in the connection portion but in the entire position detection region Ap, the portion of the through hole 4h that connects the second direction transparent electrode unit 2b and the second direction connection portion 3b is Points that are not formed.
b) According to the above a), the reflective conductive layer 5 as the second direction connecting portion 3b is connected to the second direction transparent electrode unit 2b at the through hole 4h.

[Production method]
The capacitive touch panel substrate 10 as described above, except that the insulating layer 4 is simultaneously formed as a non-forming part of the layer at the time of pattern formation, and is formed over the entire position detection region Ap. It can be manufactured in the same manner as in the first embodiment.

[Effect in this embodiment]
Even in the configuration as described above, in the capacitive touch panel substrate 10 in the present embodiment, the low reflective layer 6 hides all of the reflective conductive layer 5 used in the connection portion between the transparent electrode units. Since it has a structure, it is possible to effectively make the connection portion inconspicuous.

  In addition, in the present embodiment, the reflective conductive layer 5 is formed of the same material as the wiring 7, so the reflective conductive layer 5 is provided in the same process as the wiring 7 without increasing the number of processes. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without cost.

<< 4th Embodiment: Post-forming connection part, through-hole connection >>
FIG. 4A is a schematic plan view of a fourth embodiment of the capacitive touch panel substrate 10 according to the present invention, and FIG. 4B is a cross-sectional view taken along the line CC in FIG. It is a partial expanded sectional view.

  In the present embodiment, after the first direction transparent electrode unit 2a and the second direction transparent electrode unit 2b are formed first, the insulating layer 4 having the through holes 4h is formed over the entire position detection region Ap. This is a structure obtained by forming the second direction connecting portion 3b and connecting to 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 the second embodiment shown in FIG. 2 except for the following points. Therefore, the description of the same part is omitted.

a) Although the insulating layer 4 is formed not only in the connection portion but in the entire position detection region Ap, the portion of the through hole 4h that connects the second direction transparent electrode unit 2b and the second direction connection portion 3b is Points that are not formed.
b) According to the above a), the reflective conductive layer 5 as the second direction connecting portion 3b is connected to the second direction transparent electrode unit 2b at the through hole 4h.

[Production method]
The capacitive touch panel substrate 10 as described above, except that the insulating layer 4 is simultaneously formed as a non-forming part of the layer at the time of pattern formation, and is formed over the entire position detection region Ap. It can be manufactured in the same manner as in the second embodiment.

[Effect in this embodiment]
Even in the configuration as described above, in the capacitive touch panel substrate 10 in the present embodiment, the low reflective layer 6 hides all of the reflective conductive layer 5 used in the connection portion between the transparent electrode units. Since it has a structure, it is possible to effectively make the connection portion inconspicuous.

  In addition, in the present embodiment, the reflective conductive layer 5 is formed of the same material as the wiring 7, so the reflective conductive layer 5 is provided in the same process as the wiring 7 without increasing the number of processes. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without cost.

<< 5th Embodiment: The reflective conductive layer 5 is partially exposed from the low reflective layer 6 >>
FIG. 5A is a schematic plan view of a fifth embodiment of the capacitive touch panel substrate 10 according to the present invention, and FIG. 5B is a cross-sectional view taken along the line CC in FIG. It is a partial expanded sectional view.

  In the present embodiment, the low reflective layer 6 overlaps a part of the reflective conductive layer 5, and as a result, the reflective conductive layer 5 appears to be partially exposed from the low reflective layer 6.

  The capacitive touch panel substrate 10 of the embodiment shown in FIG. 5 is the same as the first embodiment shown in FIG. 1 except for the following points. Therefore, the 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 appears to be partially exposed from the low reflective layer 6.

[Overlapping of the low reflective layer 6 and the reflective conductive layer 5]
In each of the embodiments described so far, the low reflective layer 6 overlaps the entire area of the reflective conductive layer 5, and the outer contour shape of the low reflective layer 6 is inside the outer contour shape of the reflective conductive layer 5. It was an included form. For this reason, the reflective conductive layer 5 was completely covered with the low reflective layer 6 in the entire region, and the reflective conductive layer 5 was not visible.

  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 in the entire area, but even if the reflective conductive layer 5 is somewhat visible. In practical use, if the adverse effect on the display quality by the reflective conductive layer 5 is slight, or if the display quality can be lowered by the reflective conductive layer 5, the reflective conductive layer 5 is acceptable. However, it is also possible to have a configuration in which a portion is exposed from the low reflection layer 6.

  For example, even the low reflection layer 6 blocks the display screen, so that the low reflection layer 6 is preferably as small as possible in view of adverse effects on display quality. That is, when the adverse effect on the display quality due to the low reflective layer 6 itself is taken into consideration, the reflective conductive layer 5 may be partially exposed from the low reflective 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 and the same size as the reflective conductive layer 5. However, if the generation of some exposed portions E is allowed, the area and exposure of the low reflective layer 6 are smaller when the outer contour shape of the low reflective layer 6 is smaller than the outer contour shape of the reflective conductive layer 5. The total area of the part E can be reduced even if a slight positional shift occurs. For this reason, the element which interrupts a display screen can be made small.

  Further, 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. In some cases, it can be considered.

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

  5A and 5B, as a result of the reflective conductive layer 5 being displaced in the right direction in the drawing with respect to the low reflective layer 6, the reflective conductive layer 5 is separated from the low reflective layer 6. A situation in which an exposed portion E that is partially exposed has occurred is shown. As a result, the exposed portion E is visible from the observer V. This figure shows the case where the reflective conductive layer 5 is displaced in the extending direction of the line (X-axis direction), but the relative positional displacement between the reflective conductive layer 5 and the low reflective layer 6 is shown. When the reflective conductive layer 5 is used as a reference, the relationship may be displaced in the line width direction, or in both the line extending direction and the line width direction of the reflective conductive layer 5. The position may be displaced.

  FIG. 6 is a diagram exemplifying the case of two directions with respect to the direction of relative positional deviation between the reflective conductive layer 5 and the low reflective layer 6. 6A shows the case of the line extending direction of the reflective conductive layer 5 (X-axis direction in the figure), and FIG. 6B shows the line width of the line of the reflective conductive layer 5. The case of the direction (Y-axis direction in the figure) is shown. A direction indicated by a double-headed arrow in FIGS. 6A and 6B is a direction of relative displacement between the reflective conductive layer 5 and the low reflective layer 6. FIG. 6A corresponds to the positional deviation relationship of FIG.

  FIG. 6A shows a state in which the low reflective layer 6 is displaced in the right direction of the drawing in the X-axis direction 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. . FIG. 6B shows a state in which the low reflective layer 6 is displaced in the Y-axis direction in the downward direction of the drawing with respect to the reflective conductive layer 5, and an exposed portion E is generated above the reflective conductive layer 5. . In these drawings, for easy understanding, the reflective conductive layer 5 and the low reflective layer 6 are not hatched inside the outer contour shape, but are hatched only on the exposed portion E. Further, the outline of the reflective conductive layer 5 hidden by the low reflective layer 6 is indicated by a broken line.

(Ratio of area where the reflective conductive layer 5 is hidden by the low reflective layer 6)
Thus, in a form in which 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, the low reflective layer 6 is the reflective conductive layer. 5 is 30% or more, preferably 50% or more, more preferably 70% or more, and 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, the display quality may be deteriorated.

  As can be seen from FIG. 6, even if the dimension of the reflective conductive layer 5 protruding from the low reflective layer 6 is, for example, 1 μm, the same dimension regardless of the protruding direction, the line of the reflective conductive layer 5 The area of the exposed portion E where the reflective conductive layer 5 is exposed from the low reflective layer 6 when it protrudes in the direction (X-axis direction in the drawing) and when it protrudes in the line width direction (Y-axis direction in the drawing) The area ratio to the area of the reflective conductive layer 5 is different. In particular, the adverse effect on the display quality due to the exposed portion E of the reflective conductive layer 5 is increased when it is displaced in the line width direction shown in FIG. 6B. Even in such a situation, it is possible to suppress a decrease in display quality by setting the area ratio concealed by the low reflective layer 6 to the above value or more.

  To give a specific example, when the line width of the reflective conductive layer 5 is 15 μm, the area ratio of the total length of the line is 3 μm in the line width direction and is not concealed by the low reflective layer 6. {(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, a part of the reflective conductive layer 5 used for the connection portion between the transparent electrode units is replaced by the low reflective layer 6. Since the structure is concealed, the connection portion can be made inconspicuous. Further, the adverse effect on the display quality due to the low reflective layer 6 itself can be suppressed.

  In addition, in the present embodiment, the reflective conductive layer 5 is formed of the same material as the wiring 7, so the reflective conductive layer 5 is provided in the same process as the wiring 7 without increasing the number of processes. Therefore, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without cost.

  Furthermore, by allowing the reflective conductive layer 5 to be exposed to some extent, the alignment accuracy can be relaxed, the manufacturing can be facilitated while the adverse effect on the display quality is suppressed, and the cost can be further reduced.

<Deformation>
The capacitive touch panel substrate 10 of the present invention can take other forms other than the above-described forms. Some of these will be described below.

[Form in which 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 also a modification 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 is a modification of the second embodiment, the third embodiment, the fourth embodiment, or other forms such as a modification described later. It is also possible.

[Mode in which the exposed portion E is used as a reflecting portion]
In a 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, is actively used as a reflective portion. Also good.

  For example, in a game machine such as a shooting game, a gun-type light controller is arranged at an arbitrary position in the display screen of a display device in which a touch panel including the capacitive touch panel substrate 10 is arranged on the viewer side of the display panel. Reflection position detecting means for detecting the instructed position in the display screen by receiving the reflected light reflected by the reflection part of the exposed part E by the light emitted from the gun-type light controller. In addition, by adding a reflection position detection means such as a two-dimensional image sensor such as a CCD capable of photographing the display screen, the reflection position detection means and the reflection portion by the exposed portion E of the capacitive touch panel substrate 10 From this, it is possible to configure the optical non-contact indication position detecting means to be a shooting game machine. Note that when infrared light is used as irradiation light, discrimination from visible light can be facilitated.

  From the viewpoint of using the reflective conductive layer 5 as a reflective part, it is sufficient that the low reflective layer 6 is not provided, but the reflected light intensity can be increased. However, the reflective conductive layer 5 is exposed to light from the surrounding environment. Becomes more noticeable. However, with the configuration in which a part of the reflective conductive layer 5 is hidden by the low reflective layer 6, the basic electrical performance of the reflective conductive layer 5 as the original electrical connection means, Reflected light intensity as one component of the optical non-contact indication position detecting means, difficulty of conspicuous of the reflective conductive layer 5 as display screen quality, and alignment accuracy between the reflective conductive layer 5 and the low reflective layer 6 It is possible to more easily balance various performances such as manufacturing easiness and cost related to the above, and the degree of freedom of design can be increased.

  In addition, if the reflection part as a component of the optical non-contact indication position detecting means is provided independently of the reflective conductive layer 5, the number of processes can be increased and the cost can be increased. By using the exposed portion E of the conductive layer 5 as a reflective portion, the reflective portion is formed of the same material as that of the reflective conductive layer 5 and can be provided without increasing the number of steps.

  The application of the exposed portion E to the reflecting portion as one component of the optical non-contact indication position detecting means in the display screen can be performed by indicating an arbitrary position in the display screen in addition to the game machine application. The present invention can also be used as a controller for performing operations such as enlargement or reduction of a screen centering on a portion. For example, when the exposed portions E are regularly arranged, the exposed portions E can function as grid lines in the display screen.

  In the above-described embodiment, the use of the function as one component of the optical non-contact indication position detecting means is that the operator needs to touch the display screen in a usage application that is used separately from the touch panel function. In a usage where both functions are used together, the operator performs it when the user is at a position where the hand can reach the display screen.

[Combination of addition of decoration part 8 and front protective plate for display device]
As illustrated in FIG. 7, in the present invention, the capacitive touch panel substrate 10 can have a decoration 8 on the outer periphery of the position detection region Ap.

  The decoration unit 8 is a touch panel including the capacitive touch panel substrate 10 and a display device using the touch panel, the wiring 7 and the control circuit positioned on the outer peripheral portion of the position detection area Ap are connected to the viewer V of the display device. Or it is a part which hides so that it may not be visible from the operator of a touch panel, and does not impair an external appearance, and expresses arbitrary designs.

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

  The capacitive touch panel substrate 10 having the configuration that also serves as the display device front protective plate 50 can also be referred to as a display device front protective plate integrated touch panel substrate. In this case, the surface (the other surface, the second surface) opposite to the surface (one surface, the first surface S1) on which the first direction transparent electrode 2a and the second direction transparent electrode 2b are provided. The surface S2) functions as an input surface (touch surface, contact surface) of the touch panel where an external conductor such as an operator's finger contacts (or approaches) the touch panel sensor and position input is performed.

  The electrostatic capacitance type touch panel substrate 10 can be combined with the front protective plate 50 for a display device and integrated, thereby further reducing the number of components and reducing the thickness.

[Material identification of the low reflection layer 6 and the decorative portion 8]
In the form in which the capacitive touch panel substrate 10 also has the decorative portion 8, when the decorative portion 8 has components having low reflectivity and light shielding properties similar to the low reflective layer 6, the low reflective layer 6 is It can be formed of the same material as the decorative portion 8. The low reflective layer 6 is preferably formed of the same material as the decorative portion 8. Since the low reflective layer 6 is formed of the same material as the decorative portion 8, the low reflective layer 6 can be provided in the same process as the decorative portion 8 without increasing the number of steps. This is because it is possible to realize a structure that does not stand out without cost. Of course, in this case, the low reflection layer 6 and the decorative portion 8 are formed on the same surface of the translucent substrate 1 (see FIG. 7C), and thus can be simultaneously formed in the same process. In addition, although FIG.7 (c) has shown the example in which the low reflection layer 6 of the form of FIG. 1 was formed simultaneously with the decoration part 8, the low reflection layer 6 of another form is the decoration part 8 And may be formed simultaneously.

  The decorative portion 8 has at least a light shielding layer 8a having a light shielding property in order to hide the wiring 7 and the like, but usually also has an infrared transmission window 8b and the like. The infrared transmission window 8b is necessary to prevent malfunction of the touch panel when the mobile phone is put on the ear during a call, and from the viewpoint of extinguishing the display panel and extending the battery life. It is provided in the part of the infrared sensor provided as a human sensor that senses.

  As a component of the decoration part 8 formed with the same material as the low reflection layer 6, there exist the light shielding layer 8a and the infrared transmission layer 8bL formed in the part of the infrared transmission window 8b, for example.

[Light shielding layer 8a]
The light-shielding property of the light-shielding layer 8a depends on the required specifications and the expression color, but in terms of transmittance, it is at most 3% (optical density OD is 1.5 or more), more preferably the transmittance is 1% or less. (Optical density OD2.0 or higher), more preferably 0.01% or lower (optical density OD4.0 or higher) in transmittance is desirable. 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 a forming method. For example, the light shielding layer 8a can be formed from a layer containing a color 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.

  The color pigment used for the light shielding layer 8a may be any color pigment corresponding to the color expressed by the light shielding layer 8a, and is not particularly limited. For example, as a colored pigment, a black pigment, a white pigment, a red pigment, a yellow pigment, a blue pigment, a green pigment, a purple pigment, or the like can be used. The color pigments may be used alone, or a plurality of types of color pigments of the same type or different colors may be used.

  When the light-shielding layer 8a is formed of the same material as the low-reflection layer 6, the color exhibited by the light-shielding layer 8a is not a reflective color such as white but a dark color such as black. Moreover, black is also a kind of preferable color as a design color expressed by the decorative portion 8.

[Infrared transmission window 8b]
As illustrated in FIG. 7A and FIG. 7B, the decorative portion 8 has an infrared transmission window that has a light shielding property for visible light and a light transmittance for infrared light. An infrared transmission layer 8bL may be provided in a portion 8b. When the light shielding layer 8a is black, if carbon black is used as a black pigment, it becomes light shielding not only for visible light but also for infrared light. This is because the transmissive layer 8bL may be required.

  The transmittance of the infrared transmission window 8b with respect to infrared light depends on required specifications, expression color, and infrared components such as an infrared sensor applied to the infrared transmission window 8b. It is sufficient that the transmittance at 70 is 70% or more. The infrared region where the transmittance is 70% or more is not necessarily a region of 780 nm or more. For example, a region of 850 nm or more can function sufficiently. Note that the upper limit of the infrared region where the transmittance is 70% or more should satisfy the near infrared region, usually up to 1300 nm.

  The light shielding property of the infrared transmission window 8b with respect to visible light depends on the required specifications and the expression color. However, since the infrared transmission window 8b is usually small in spot, the infrared transmission window 8b and the light shielding layer are not necessarily used. It is not necessary to match the light shielding level of 8a. For this reason, as an example, the light shielding property with respect to visible light of the infrared transmission window 8b is 50% or less (0.2 or more in optical density OD) in terms of transmittance, more preferably transmittance. It is desirably 25% or less (optical density OD 0.6 or more), more preferably 10% or less (optical density OD 1.0 or more) in terms of transmittance.

  Thus, the infrared transmission window 8b has, for example, a transmittance of 70% or more at a wavelength of 850 nm to 1300 nm for the infrared light region and a transmittance of 10% or less for the visible light region. The 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 similar color to the light shielding layer 8a in order to make the presence of the infrared transmission window 8b inconspicuous. The infrared transmission layer 8bL exhibits a light shielding property with respect to visible light and a transparency with respect to infrared light.

  The color that the infrared transmission layer 8bL exhibits 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. Moreover, black is also a kind of preferable color as a design color expressed by the decorative portion 8.

  The infrared transmission layer 8bL does not contain a black pigment such as carbon black, but contains a plurality of types of chromatic color pigments having different colors, for example, red, yellow, and blue, thereby providing a dark color such as black. It can be formed as an expressed layer.

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

  Further, when the wiring 7 is also provided, in order to hide the wiring 7 by the light shielding layer 8a, the formation order of the light shielding layer 8a and the wiring 7 with respect to the translucent substrate 1 is the same as that when the capacitive touch panel substrate 10 is used. In the case of the infrared transmission layer 8bL in which the wiring 7 does not overlap, the front and back directions with respect to the observer V or the operator are regulated, but the transparent substrate 1 of the infrared transmission layer 8bL and the wiring 7 is opposed to each other. The order of formation is not restricted 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 layer is formed in the infrared transmission window 8b portion of the light shielding layer 8a. 8bL is formed or, conversely, (b) after the low reflection layer 6 and the light shielding layer 8a are simultaneously formed, the infrared transmission layer 8bL is formed in the infrared transmission window 8b portion of the light shielding layer 8a. Then, the wiring 7 can be formed on the light shielding layer 8a. In this respect, the form in which the low reflection layer 6 is formed of the same material as the infrared transmission layer 8bL has an advantage that the degree of freedom in product design is not hindered.

[Overcoat layer 9]
The capacitive touch panel substrate 10 can include a transparent overcoat layer 9 as illustrated in FIG. 8. This figure shows an example in which the overcoat layer 9 is formed as the uppermost layer on the surface of the first surface S1 which is one surface of the translucent substrate 1. Although the figure shows a form in which an overcoat layer 9 is added to the form of FIG. 1, the overcoat layer 9 may be added to other forms. Reliability can be improved by the overcoat layer 9.

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

[C] Display device:
The display device according to the present invention is a display device including at least the display panel and the above-described capacitance type touch panel substrate 10 disposed on the viewer side of the display panel. Hereinafter, two typical modes will be described as examples.

<< First Embodiment >>
A display device 100 according to the present invention illustrated in FIG. 9 is for a display panel 40, a touch panel 30 including the above-described capacitive touch panel substrate 10 on the viewer V side of the display panel 40, and a display device such as a cover glass. This is a configuration example including at least the front protective plate 50 in this order.

  The display panel 40 is typically a liquid crystal display panel or an electroluminescence (EL) panel, but may be a display device using an electronic paper panel or a cathode ray tube, or any of various known display panels.

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

  In this configuration, since the display device front protective plate 50 is provided separately from the touch panel 30, the capacitive touch panel substrate 10 has the low reflective layer 6 relative to the reflective conductive layer 5. Any configuration may be used as long as it is arranged in a direction close to the observer V. That is, which of the reflective conductive layer 5 and the low reflective layer 6 is in a position far from the translucent substrate 1 in the thickness direction may be any, and the first surface of the translucent substrate 1 is the first surface. The first surface S1 can be arranged in the direction of the front side in addition to the direction of the back side.

  A well-known thing can be employ | adopted for the front-surface protective plate 50 for display apparatuses, for example, uses glass plates, such as chemically strengthened glass, and resin plates, such as an acrylic resin, as a transparent base material, The center part of this base material As the display area, it is possible to adopt an opaque decoration portion 8 decorated with an arbitrary color and pattern such as black on the outer periphery of the display area.

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

  By setting it as such a structure, it can be set as the display apparatus with which the connection part between the transparent electrode units in the capacitive touch panel substrate 10 with which the touch panel 30 is provided is not conspicuous.

<< Second Embodiment >>
The display device 100 according to the present invention illustrated in FIG. 10 includes the display panel 40 and the above-described capacitive touch panel in the form of using the display device front protective plate 50 such as a cover glass on the viewer side of the display panel 40. 2 is a configuration example including at least a touch panel 30 including a substrate 10.

  By adopting such a configuration, in addition to the effects of the configuration of FIG. 9, the effects of reducing the number of parts and reducing the thickness can be obtained.

  Moreover, in the form which made the wiring 7 formed in the decoration part 8 and the reflective conductive layer 5 into the same material, or made the low reflection layer 6 into the same material as the decoration part 8, it forms with the same material. Since the layers can be provided in the same process without increasing the number of processes, a structure in which the reflective conductive layer 5 is not conspicuous can be realized without cost.

《Interposition of resin layer such as adhesive sheet》
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 between the touch panel 30 and the display device front protective plate 50. However, in the display device 100 of the present invention, a gap between the constituent members may be filled with a known resin layer such as an adhesive layer. Since the light reflection on the surface of the member is reduced by the resin layer, the display can be more easily seen.

[D] Application:
Applications of the capacitive touch panel substrate 10 and the display device 100 according to the present invention are not particularly limited. For example, a mobile phone such as a smartphone, a portable information terminal such as a tablet PC, a personal computer, a car navigation system, a digital camera, an electronic notebook, a game machine, an automatic ticket vending machine, an ATM terminal, a POS terminal, and the like.

Claims (10)

A translucent 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 either one of the first surface and the second surface of the translucent substrate;
A first direction connecting portion that is formed on the same surface with the same material as the first direction transparent electrode unit and connects the first direction transparent electrode units;
The first direction transparent electrode unit is formed of the same material and on the same surface, is located between the first direction transparent electrode units and is located between the first direction connection portions, and intersects the first direction. A plurality of second direction transparent electrode units arranged in a second direction;
The second direction transparent electrode units are connected to each other, the second direction connection part is insulated from the first direction connection part via an insulating layer, and includes a reflective conductive layer;
Observation from a direction perpendicular to the one surface of the translucent substrate, showing low reflectivity by the International Illumination Commission CIE with a Y value of 10% or less in the Yxy color system using the standard light source C A low reflective layer overlapping at least a portion of the reflective conductive layer,
A capacitive touch panel substrate.   2. 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 outer contour shape of the low reflection layer when observed from a direction perpendicular to the one surface of the translucent substrate includes the outer contour shape of the reflective conductive layer on the inner side. The capacitive touch panel substrate described. The outer peripheral portion of the position detection region in which the first direction transparent electrode unit and the second direction transparent electrode unit are arranged, and on the one surface of the translucent substrate, has a decoration portion,
The capacitive touch panel substrate according to any one of claims 1 to 3, wherein the low reflective layer is formed of the same material as the decorative portion. The outer periphery of the position detection region in which the first direction transparent electrode unit and the second direction transparent electrode unit are arranged and having a wiring on the one surface of the translucent substrate,
The capacitive touch panel substrate according to claim 1, wherein the reflective conductive layer is formed of the same material as the wiring.   The capacitive touch panel substrate according to claim 1, wherein the low reflective layer is formed on the light transmissive substrate side with respect to the reflective conductive layer in a thickness direction.   The capacitive touch panel substrate according to claim 6, 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, wherein a surface opposite to the one surface of the translucent substrate functions as an input surface of the touch panel.   The capacitance type according to claim 1, wherein the low reflection layer is formed on a side farther from the translucent substrate than the reflective conductive layer in the thickness direction. Touch panel substrate. A display panel;
A capacitive touch panel substrate according to claim 1, which is disposed on the viewer side of the display panel.

Images