JP6084117B2 - Touch panel, display device and electronic device - Google Patents
Touch panel, display device and electronic device Download PDFInfo
- Publication number
- JP6084117B2 JP6084117B2 JP2013109267A JP2013109267A JP6084117B2 JP 6084117 B2 JP6084117 B2 JP 6084117B2 JP 2013109267 A JP2013109267 A JP 2013109267A JP 2013109267 A JP2013109267 A JP 2013109267A JP 6084117 B2 JP6084117 B2 JP 6084117B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- touch panel
- transparent film
- electrode cell
- transparent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
本発明は、静電容量式の透明なタッチパネル、当該タッチパネルを備えた表示装置、及び、当該表示装置を備えた電子機器に関する。 The present invention relates to a capacitive transparent touch panel, a display device including the touch panel, and an electronic device including the display device.
近年、コンピューターや電子機器において、押しボタンを用いずにディスプレイの表示を利用した操作の開発が盛んである。その操作のために、ディスプレイの前面に透明のタッチパネルを配置して、タッチ位置を検出する。タッチパネルの種類としては、抵抗膜式、表面弾性波式、赤外線方式などがあり、指のタッチや近接による静電容量の変化で位置を検出する静電容量式もある。例えば、特許文献１には、マトリクス状の電極（Ｘ方向、Ｙ方向の２層構造）の静電容量式タッチスイッチが記載されている。 2. Description of the Related Art In recent years, in computers and electronic devices, development of operations using display on a display without using push buttons has been active. For this operation, a transparent touch panel is arranged on the front surface of the display to detect the touch position. Types of touch panels include a resistance film type, a surface acoustic wave type, an infrared type, and the like, and there is also a capacitance type that detects a position by a change in capacitance due to a finger touch or proximity. For example, Patent Document 1 describes a capacitive touch switch having matrix electrodes (two-layer structure in the X direction and the Y direction).
従来の静電容量式タッチパネルは、基板の一方面に帯状にパターニングされたＩＴＯなどからなる透明の第１電極が形成された第１面状体と、基板の一方面に帯状にパターニングされたＩＴＯなどからなる透明の第２電極が形成された第２面状体とを備えており、第１電極及び第２電極とが互いに対向するようにして、両面状体が粘着層を介して貼着されている。しかしながら、ＩＴＯは抵抗率が高く、２００Ω/□〜１０００Ω/□が一般的である。特に大型のタッチパネルでは、電極の端子間の抵抗値が増加し、これに伴い静電容量検出の感度が低下するため、タッチパネルとして動作させることが困難になる場合がある。 A conventional capacitive touch panel includes a first planar body in which a transparent first electrode made of ITO or the like patterned in a strip shape is formed on one surface of a substrate, and an ITO patterned in a strip shape on one surface of the substrate. And a second planar body on which a transparent second electrode is formed, and the two-sided body is bonded via an adhesive layer so that the first electrode and the second electrode face each other. Has been. However, ITO has a high resistivity, and is generally 200Ω / □ to 1000Ω / □. In particular, in a large-sized touch panel, the resistance value between the terminals of the electrodes increases, and the sensitivity of capacitance detection decreases accordingly, which may make it difficult to operate as a touch panel.
そこで、ＩＴＯを使用しない静電容量式のタッチパネルが提案されている（例えば、特許文献２を参照）。特許文献２のタッチパネルでは、銅または銅合金からなる金属線を網目状に形成することにより電極を形成することで、電極の透過率を７０％以上にしており、視認性を維持したまま低抵抗の電極を形成している。 Therefore, a capacitive touch panel that does not use ITO has been proposed (see, for example, Patent Document 2). In the touch panel of Patent Document 2, the electrode is formed by forming a metal wire made of copper or a copper alloy in a mesh shape, so that the transmittance of the electrode is 70% or more, and low resistance is maintained while maintaining visibility. The electrode is formed.
しかしながら、特許文献２のタッチパネルでは、基板の一方面に網目状の第１電極が形成された第１面状体と、基板の一方面に網目状の第２電極が形成された第２面状体とを重ね合わせた構造であるため、タッチパネル全体の厚みが厚くなる。近年、タッチパネルは、薄型・軽量化が求められているところ、特許文献２のタッチパネルでは軽薄の要求に不利であるという問題がある。 However, in the touch panel of Patent Document 2, a first planar body in which a mesh-like first electrode is formed on one surface of a substrate and a second planar shape in which a mesh-like second electrode is formed on one surface of the substrate. Since the structure is formed by superimposing the body, the thickness of the entire touch panel is increased. In recent years, the touch panel is required to be thin and light, but the touch panel of Patent Document 2 has a problem that it is disadvantageous for the requirement for lightness and thinness.
本発明は、上記問題に着目してなされたもので、低抵抗な網目状の電極を備えたタッチパネルにおいて、薄型・軽量を実現したタッチパネルを提供することを目的とする。また、当該タッチパネルを備えた表示装置、及び、当該表示装置を備えた電子機器を提供することを目的とする。 The present invention has been made paying attention to the above problem, and an object of the present invention is to provide a touch panel that is thin and lightweight in a touch panel including a low-resistance mesh-like electrode. It is another object of the present invention to provide a display device including the touch panel and an electronic device including the display device.
本発明の上記目的は、基板と、前記基板の一方面側の第１方向に間隔をあけて配置される複数の第１電極と、前記基板の一方面側の前記第１方向と交差する第２方向に間隔をあけて配置される複数の第２電極と、を備えたタッチパネルであって、前記第１電極は、複数の導体線を交差させることで形成された複数の第１電極セルと、隣り合う前記第１電極セルの前記導体線同士を電気的に接続する少なくとも１本の接続用導体線と、からなり、前記第２電極は、複数の導体線を交差させることで形成された複数の第２電極セルと、隣り合う前記第２電極セルの前記導体線同士を電気的に接続する接続用透明導電膜と、からなり、前記接続用導体線及び前記接続用透明導電膜の間に介在して、前記接続用導体線と前記接続用透明導電膜とを絶縁する絶縁層と、前記第１電極セル及び前記第２電極セルの上方又は下方にそれぞれ重ね合わされる第１透明膜及び第２透明膜と、をさらに備えるタッチパネルによって達成される。 The object of the present invention is to provide a substrate, a plurality of first electrodes arranged at intervals in a first direction on one side of the substrate, and a first direction intersecting with the first direction on one side of the substrate. A plurality of second electrodes arranged at intervals in two directions, wherein the first electrode includes a plurality of first electrode cells formed by intersecting a plurality of conductor lines; And at least one connecting conductor wire that electrically connects the conductor wires of the adjacent first electrode cells, and the second electrode is formed by crossing a plurality of conductor wires A plurality of second electrode cells and a transparent conductive film for connection that electrically connects the conductor lines of the adjacent second electrode cells, and between the connection conductive line and the transparent conductive film for connection Insulating the connection conductor wire from the connection transparent conductive film That an insulating layer is achieved by the first electrode cell and the second first transparent film and the second transparent layer and further comprising a touch panel is superimposed respectively above or below the electrode cell.
上記構成のタッチパネルにおいては、前記第１透明膜及び前記第２透明膜は、前記接続用透明導電膜と同材料からなることが好ましい。 In the touch panel having the above structure, it is preferable that the first transparent film and the second transparent film are made of the same material as the transparent conductive film for connection.
また、前記第２透明膜は、前記接続用透明導電膜と一体に形成されていることが好ましい。 The second transparent film is preferably formed integrally with the connection transparent conductive film.
また、前記第１電極セル及び前記第２電極セルは、それぞれ前記第１透明膜及び前記第２透明膜と導通していることが好ましい。 Further, it is preferable that the first electrode cell and the second electrode cell are electrically connected to the first transparent film and the second transparent film, respectively.
前記第１透明膜及び前記第２透明膜は、少なくとも隣接する前記第２透明膜及び前記第１透明膜と対向する一部の周縁が、凸部及び凹部が交互に並ぶ凹凸状に形成されており、隣接する前記第２透明膜及び前記第１透明膜との境界において、所定間隔をあけて、前記凸部が隣接する前記透明膜の前記凸部間に配置されることが好ましい。 The first transparent film and the second transparent film are formed in an uneven shape in which at least a part of the periphery facing the second transparent film and the first transparent film adjacent to each other is alternately arranged with convex portions and concave portions. Preferably, at the boundary between the adjacent second transparent film and the first transparent film, the convex portions are arranged between the convex portions of the adjacent transparent films at a predetermined interval.
また、前記接続用導体線が網目を形成していることが好ましい。 Further, it is preferable that the connecting conductor wire forms a mesh.
また、前記第１電極及び前記第２電極は、両端部間の導通性を阻害しない範囲で前記導体線を切断する切断部を備えることが好ましい。 Moreover, it is preferable that the said 1st electrode and the said 2nd electrode are provided with the cutting part which cut | disconnects the said conductor wire in the range which does not inhibit the electrical conductivity between both ends.
また、前記基板のリタデーションが、０ｎｍ〜８００ｎｍであることが好ましい。 Moreover, it is preferable that the retardation of the said board | substrate is 0 nm-800 nm.
本発明の上記目的は、上記構成のタッチパネルを備えた表示装置によっても達成される。 The above object of the present invention is also achieved by a display device including the touch panel having the above configuration.
本発明の上記目的は、上記構成の表示装置を備えた電子機器によっても達成される。 The above object of the present invention is also achieved by an electronic apparatus including the display device having the above structure.
本発明によれば、複数の導体線を交差させることで網目状の電極を形成しているので、基板上に形成される電極パターンの低抵抗化を図ることができる。さらに、電極パターンを目立たせることがない上、色目の相違を軽減し、タッチパネルの視認性も向上させることができるので、静電容量式のタッチパネルとして好適に用いることができる。また、第１電極及び第２電極のいずれもが基板の一方面に形成されているので、タッチパネルの構造の簡略化と全体的な厚み・重さの軽減を実現できるという優位性を有する。 According to the present invention, since the mesh-like electrode is formed by intersecting a plurality of conductor lines, the resistance of the electrode pattern formed on the substrate can be reduced. Furthermore, since the electrode pattern is not conspicuous, the color difference can be reduced, and the visibility of the touch panel can be improved, so that it can be suitably used as a capacitive touch panel. In addition, since both the first electrode and the second electrode are formed on one surface of the substrate, there is an advantage that the structure of the touch panel can be simplified and the overall thickness and weight can be reduced.
以下、本発明の実態形態について添付図面を参照して説明する。尚、各図面は、構成の理解を容易にするため、実寸比ではなく部分的に拡大又は縮小されている。 Hereinafter, actual forms of the present invention will be described with reference to the accompanying drawings. Each drawing is partially enlarged or reduced to facilitate understanding of the configuration, not the actual size ratio.
図１は、本発明の一実施形態に係るタッチパネル１の平面図である。図２及び図３は図１のタッチパネル１の一部分を拡大して示す概略断面図である。本実施形態に係るタッチパネル１は、静電容量式のタッチパネルであり、透明な基板２と、基板２の一方面Ｓ側に設けられた複数の帯状の第１電極３及び複数の帯状の第２電極４と、第１電極セル３及び第２電極４が交差する部分に設けられる絶縁層７と、第１電極３及び第２電極４の各電極セル３０，４０の上方又は下方にそれぞれ重ね合わされる第１透明膜８及び第２透明膜９とを備えている。第１電極３は、基板２の一方面Ｓの第１方向（Ｘ方向）に所定間隔をあけて配置されており、隣接する第１電極３間は電気的に絶縁されている。一方、第２電極４は、基板２の一方面Ｓの前記第１方向（Ｘ方向）と垂直に交差する第２方向（Ｙ方向）に所定間隔をあけて配置されており、隣接する第２電極４間が電気的に絶縁されている。各第１電極３及び各第２電極４には、線状の配線５，６が接続されている。各配線５，６は、基板２の端縁まで延びるように配線されており、その先端部が静電容量検出回路（図示省略）に接続されている。各配線５，６は、その距離や幅を考慮して低抵抗とすることが好ましい。なお、本実施形態では、第１方向（Ｘ方向）及び第２方向（Ｙ方向）は直交しているが、直交しない角度で基板２の一方面Ｓ上に第１電極３及び第２電極４を配置することもできる。 FIG. 1 is a plan view of a touch panel 1 according to an embodiment of the present invention. 2 and 3 are schematic cross-sectional views showing an enlarged part of the touch panel 1 of FIG. The touch panel 1 according to the present embodiment is a capacitive touch panel, and includes a transparent substrate 2, a plurality of strip-shaped first electrodes 3 and a plurality of strip-shaped second electrodes provided on the one surface S side of the substrate 2. The electrode 4, the insulating layer 7 provided at the intersection of the first electrode cell 3 and the second electrode 4, and the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4 are respectively overlapped above or below. The first transparent film 8 and the second transparent film 9 are provided. The first electrodes 3 are arranged at a predetermined interval in the first direction (X direction) of the one surface S of the substrate 2, and the adjacent first electrodes 3 are electrically insulated. On the other hand, the second electrode 4 is arranged at a predetermined interval in a second direction (Y direction) perpendicularly intersecting the first direction (X direction) of the one surface S of the substrate 2, and is adjacent to the second electrode 4. The electrodes 4 are electrically insulated. Linear wirings 5 and 6 are connected to each first electrode 3 and each second electrode 4. Each of the wirings 5 and 6 is wired so as to extend to the edge of the substrate 2, and its tip is connected to a capacitance detection circuit (not shown). Each of the wires 5 and 6 is preferably low resistance in consideration of the distance and width. In the present embodiment, the first direction (X direction) and the second direction (Y direction) are orthogonal to each other, but the first electrode 3 and the second electrode 4 on the one surface S of the substrate 2 at an angle that is not orthogonal. Can also be arranged.
基板２は、誘電体基板である。基板２の材料は、ガラス、ポリエステル、ポリエチレンテレフタレート、ポリカーボネート、ポリメチルメタクリレート、ポリエチレンナフタレートなどの透明材料が挙げられる。ガラスであれば、厚みは０．１ｍｍ〜３ｍｍ程度が好ましく、プラスチックフィルムであれば厚みは１０μｍ〜２０００μｍ程度が好ましい。また、これらの材料を多層に積層してもよい。また、基板２の表面に、表面保護のためのハードコート層や、反射防止層、防汚層、アンチブロッキング層、受容層などの機能層を設けたり、プラズマ処理などを施したりしてもよい。 The substrate 2 is a dielectric substrate. Examples of the material of the substrate 2 include transparent materials such as glass, polyester, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyethylene naphthalate. If it is glass, the thickness is preferably about 0.1 mm to 3 mm, and if it is a plastic film, the thickness is preferably about 10 μm to 2000 μm. Further, these materials may be laminated in multiple layers. Further, a hard coat layer for surface protection, a functional layer such as an antireflection layer, an antifouling layer, an antiblocking layer, and a receiving layer may be provided on the surface of the substrate 2, or plasma treatment may be performed. .
図１〜図４に示すように、第１電極３は、複数の第１電極セル３０と、隣接する第１電極セル３０を電気的に接続する接続用導体線３１とを備えている。また、第２電極４は、複数の第２電極セル４０と、隣接する第２電極セル４０を電気的に接続する接続用透明導電膜４１とを備えている。 As shown in FIGS. 1 to 4, the first electrode 3 includes a plurality of first electrode cells 30 and connection conductor lines 31 that electrically connect the adjacent first electrode cells 30. The second electrode 4 includes a plurality of second electrode cells 40 and a connecting transparent conductive film 41 that electrically connects the adjacent second electrode cells 40.
複数の第１電極セル３０は、基板２の一方面Ｓの第２方向（Ｙ方向）に等間隔で配置されている。第１電極セル３０は、複数の導体線Ｌを交差させることによって網目状に形成されており、複数の格子Ｋが組み合わされた形状である。格子Ｋは、図示例では正方形状である。第１電極セル３０を構成する導体線Ｌの線幅は、例えば１μｍ〜５０μｍ程度であり、好ましくは１μｍ〜２５μｍ程度であり、より好ましくは１μｍ〜１０μｍ程度である。また、導体線Ｌのピッチは、例えば１００μｍ〜１０００μｍ程度である。また、導体線Ｌの厚みは、例えば０．０１μｍ〜１０μｍ程度であり、さらに好ましくは０．０５μｍ〜５μｍ程度である。このような寸法を有する第１電極セル３０は、導体線Ｌの線幅が非常に細く、線幅に対するピッチが十分に大きいため目立ちにくい。 The plurality of first electrode cells 30 are arranged at equal intervals in the second direction (Y direction) of the one surface S of the substrate 2. The first electrode cell 30 is formed in a mesh shape by intersecting a plurality of conductor lines L, and has a shape in which a plurality of lattices K are combined. The lattice K has a square shape in the illustrated example. The line width of the conductor line L constituting the first electrode cell 30 is, for example, about 1 μm to 50 μm, preferably about 1 μm to 25 μm, and more preferably about 1 μm to 10 μm. The pitch of the conductor lines L is, for example, about 100 μm to 1000 μm. Moreover, the thickness of the conductor line L is about 0.01 micrometer-10 micrometers, for example, More preferably, it is about 0.05 micrometer-5 micrometers. The first electrode cell 30 having such dimensions is hardly noticeable because the line width of the conductor line L is very thin and the pitch with respect to the line width is sufficiently large.
複数の第２電極セル４０は、基板２の一方面Ｓの第１方向（Ｘ方向）に等間隔で配置されている。第１電極セル３０及び第２電極セル４０の外形は、本実施形態では菱形状であり、第２電極セル４０は、基板２の一方面Ｓ上に設けられた第１電極セル３０と重ならないように第１電極セル３０が存在しない空いたスペースを埋めるように設けられる。これにより、基板２の一方面Ｓは、複数の第１電極セル３０及び複数の第２電極セル４０が敷き詰められた状態となる。第２電極セル４０も、第１電極セル３０と同様に、複数の導体線Ｌを交差させることによって網目状に形成されており、導体線Ｌが第１電極セル３０を構成する導体線Ｌとは接続されないように隙間をあけて配線されている。この第２電極セル４０を構成する導体線Ｌは、第１電極セル３０を構成する導体線Ｌと同じ線幅、ピッチ、厚みであり、第２電極セル４０は、第１電極セル３０と同形状の格子Ｋが複数組み合わされた形状である。なお、第２電極セル４０は、第１電極セル３０と同じ材料で形成されても異なる材料で形成されてもよいが、第１電極セル３０と同じ材料で一体に基板２の一方面Ｓ上に形成するのが、第２電極セル４０を効率よく形成することが可能であるので好ましい。 The plurality of second electrode cells 40 are arranged at equal intervals in the first direction (X direction) of the one surface S of the substrate 2. The external shapes of the first electrode cell 30 and the second electrode cell 40 are rhombic in the present embodiment, and the second electrode cell 40 does not overlap the first electrode cell 30 provided on the one surface S of the substrate 2. In this way, the first electrode cell 30 is provided so as to fill a vacant space where there is no existing electrode cell 30. Thereby, the one surface S of the substrate 2 is in a state in which the plurality of first electrode cells 30 and the plurality of second electrode cells 40 are spread. Similarly to the first electrode cell 30, the second electrode cell 40 is formed in a mesh shape by intersecting a plurality of conductor lines L, and the conductor line L and the conductor line L constituting the first electrode cell 30 Are wired with a gap so that they are not connected. The conductor line L constituting the second electrode cell 40 has the same line width, pitch and thickness as the conductor line L constituting the first electrode cell 30, and the second electrode cell 40 is the same as the first electrode cell 30. This is a shape in which a plurality of shaped lattices K are combined. The second electrode cell 40 may be formed of the same material as the first electrode cell 30 or a different material. However, the second electrode cell 40 may be integrally formed on the one surface S of the substrate 2 with the same material as the first electrode cell 30. It is preferable to form the second electrode cell 40 because the second electrode cell 40 can be efficiently formed.
接続用導体線３１は、隣り合う第１電極セル３０の導体線Ｌ同士を互いに接続する線状のものであり、隣り合う第１電極セル３０の間に１本又は複数本設けられている。接続用導体線３１の形状は、一方向に延びる直線的な形状であってもよいし、１箇所又は複数箇所で屈曲した形状（Ｌ字状、ジグザグ状など）であってもよく、接続用導体線３１は、直線的に延びている場合には、第１電極セル３０の導体線Ｌと同方向（Ｕ方向又はＶ方向）を向いており、屈曲している場合には、それぞれ直線的に延びる構成部分３１Ａが導体線Ｌと同方向（Ｕ方向又はＶ方向）を向いている。また、接続用導体線３１（接続用導体線３１が屈曲している場合には、直線的に延びる構成部分３１Ａ）は、第１電極セル３０のいずれかの導体線Ｌの延長上に位置して、当該導体線Ｌと１本の線状となっていることが好ましい。接続用導体線３１は、第１電極セル３０の導体線Ｌと同じ材料で形成されても異なる材料で形成されてもよいが、導体線Ｌと同じ材料で一体に基板２の一方面Ｓ上に形成するのが、接続用導体線３１を効率よく形成することが可能であるので好ましい。 The connecting conductor line 31 is a line-shaped conductor that connects the conductor lines L of the adjacent first electrode cells 30 to each other, and one or a plurality of connecting conductor lines 31 are provided between the adjacent first electrode cells 30. The shape of the connecting conductor wire 31 may be a linear shape extending in one direction, or may be a shape bent at one place or a plurality of places (L shape, zigzag shape, etc.). The conductor line 31 faces in the same direction (U direction or V direction) as the conductor line L of the first electrode cell 30 when extending linearly, and is linear when bent. The component part 31A extending in the direction of the conductor line L faces the same direction (U direction or V direction) as the conductor line L. In addition, the connecting conductor line 31 (the constituent part 31A that extends linearly when the connecting conductor line 31 is bent) is positioned on the extension of one of the conductor lines L of the first electrode cell 30. Thus, it is preferable that the conductor wire L and one line are formed. The connecting conductor line 31 may be formed of the same material as or different from the conductor line L of the first electrode cell 30, but is integrally formed on the one surface S of the substrate 2 with the same material as the conductor line L. It is preferable to form the connection conductor wire 31 because the connection conductor wire 31 can be efficiently formed.
接続用導体線３１は、本実施形態では、隣り合う第１電極セル３０の間に複数本設けられ、複数の接続用導体線３１が、複数の格子Ｋが組み合わされた網目を形成するように配線されている。すなわち、第１電極３と第２電極４とが交差する部分に、周りの第１電極セル３０及び第２電極セル４０を構成する格子Ｋと同形状の複数の格子Ｋが一様に配置される。これにより、基板２の一方面Ｓ上に、第１電極セル３０及び第２電極セル４０の導体線Ｌと接続用導体線３１とにより見た目が全体的に均一な網目状パターンが形成される。その結果、第１電極３及び第２電極４のパターン形状を目立ちにくくすることができ、タッチパネル１の視認性を向上させることができる。 In the present embodiment, a plurality of connection conductor lines 31 are provided between adjacent first electrode cells 30 so that the plurality of connection conductor lines 31 form a mesh in which a plurality of lattices K are combined. Wired. That is, a plurality of lattices K having the same shape as the lattices K constituting the surrounding first electrode cell 30 and second electrode cell 40 are uniformly arranged at the intersection of the first electrode 3 and the second electrode 4. The As a result, on the one surface S of the substrate 2, a mesh pattern having a uniform appearance as a whole is formed by the conductor lines L and the connection conductor lines 31 of the first electrode cell 30 and the second electrode cell 40. As a result, the pattern shapes of the first electrode 3 and the second electrode 4 can be made inconspicuous, and the visibility of the touch panel 1 can be improved.
さらに、本実施形態では、図４に示すように、第１電極セル３０の４つの辺部のうち、第２電極セル４０と対向する辺部に、対向する第２電極セル４０に向けて導体線Ｌが張り出した張出線３２が複数設けられているとともに、第２電極セル３０の４つの辺部のうち、第１電極セル３０と対向する辺部にも、対向する第１電極セル３０に向けて導体線Ｌが張り出した張出線４２が複数設けられている。これらの張出線３２，４２は、必ずしも互い違いである必要はないが、図４のように互い違いとなるよう交互に設けられるほうが、隙間Ｏが目立ちにくくなり、好ましい。これらの張出線３２，４２が、第１電極セル３０及び第２電極セル４０の導体線Ｌと格子Ｋを形成することで、第１電極セル３０と第２電極セル４０との隙間が格子Ｋで埋められる。これにより、第１電極セル３０及び第２電極セル４０の隙間が目立たなくなり、基板２の一方面Ｓ上に全体的により精密な網目状パターンが形成されるので、タッチパネル１の視認性をより一層向上させることができる。 Furthermore, in this embodiment, as shown in FIG. 4, among the four sides of the first electrode cell 30, a conductor facing the second electrode cell 40 facing the side facing the second electrode cell 40. A plurality of overhanging lines 32 with overhanging lines L are provided, and among the four sides of the second electrode cell 30, the side facing the first electrode cell 30 is also opposed to the first electrode cell 30. A plurality of overhanging wires 42 with the conductor wires L overhanging are provided. These overhang lines 32 and 42 do not necessarily have to be staggered, but it is preferable that they are alternately provided as shown in FIG. 4 because the gap O is less noticeable. These overhang lines 32 and 42 form a grid K with the conductor lines L of the first electrode cell 30 and the second electrode cell 40, so that the gap between the first electrode cell 30 and the second electrode cell 40 is a grid. Filled with K. As a result, the gap between the first electrode cell 30 and the second electrode cell 40 becomes inconspicuous, and a more precise network pattern is formed on the one surface S of the substrate 2, so that the visibility of the touch panel 1 is further increased. Can be improved.
なお、上記した説明において、網目状とは、導体線Ｌや接続用導体線３１の線と線とが交点を有するように交差していることに加えて、線が交わる部分において少なくとも一方の線が断続しているために線と線とが交点を有さないが交差していることも含んでいる。 In the above description, the mesh shape means that the conductor wire L and the connecting conductor wire 31 intersect with each other so as to have an intersection, and at least one of the wires intersects with each other. This includes the fact that the lines do not have an intersection because they are intermittent, but intersect.
接続用導体線３１と第２電極セル４０の導体線Ｌとの間には、両者が電気接続しないように隙間Ｏが形成される。図４では、説明のため隙間Ｏを大きめに描写しているが、隙間Ｏを小さくする方が視認性の観点からは好ましい。また、接続用導体線３１の配線パターンは、接続用導体線３１と第２電極セル４０の導体線Ｌとの隙間Ｏがまとまって現れるように形成すると、隙間Ｏが集中して目立ってしまい、タッチパネル１の視認性に悪影響を与える。よって、接続用導体線３１と第２電極セル４０の導体線Ｌとの隙間Ｏが集中せず、より目立ちにくくなるよう多少ばらけて現れるように、第２電極セル４０の導体線Ｌや接続用導体線３１などの配線パターンを設定することが好ましい。 A gap O is formed between the connecting conductor line 31 and the conductor line L of the second electrode cell 40 so that they are not electrically connected. In FIG. 4, the gap O is depicted to be large for the sake of explanation, but it is preferable to reduce the gap O from the viewpoint of visibility. Further, if the wiring pattern of the connecting conductor line 31 is formed so that the gap O between the connecting conductor line 31 and the conductor line L of the second electrode cell 40 appears together, the gap O is concentrated and becomes conspicuous. This adversely affects the visibility of the touch panel 1. Accordingly, the gap O between the connection conductor line 31 and the conductor line L of the second electrode cell 40 is not concentrated, and the conductor line L and the connection of the second electrode cell 40 appear so as to be somewhat inconspicuous. It is preferable to set a wiring pattern such as the conductor wire 31 for use.
基板２の一方面Ｓ側には、少なくとも接続用導体線３１の一部を覆うようにして、絶縁層７が設けられている。絶縁層７は、透明でかつ導電性がない絶縁材料であれば、材料は特に限定されないが、その下方及び上方に配置される接続用導体線３１及び接続用透明導電膜４１との密着性が高いものが望まれ、エポキシ系やアクリル系などの一般的な熱硬化性透明樹脂や光硬化性透明樹脂などを用いることができる。このような透明樹脂を公知のコーティング法やスクリーン印刷法、インクジェット印刷法などで接続用導体線３１を覆うように塗布することで、絶縁層７を形成できる。また、酸化珪素などの無機絶縁材料を用いて、スパッタリング法、真空蒸着法、イオンプレーティング法などのＰＶＤ法や、ＣＶＤ法などにより、絶縁層７を形成することができる。その他、ポリエステル系樹脂の透明性フィルムなどを少なくとも接続用導体線３１を覆うように基板２の一方面Ｓ上に貼り付けることによっても、絶縁層７を形成できる。絶縁層７の厚みは、特に限定されるものではなく、例えば０．１μｍ〜５０μｍ程度とすることができる。また、絶縁層７の外形は、図４では矩形状であるが、これに限られることなく、例えば多角形状、円形状など、種々の形状とすることができる。 An insulating layer 7 is provided on the one surface S side of the substrate 2 so as to cover at least a part of the connecting conductor wire 31. The insulating layer 7 is not particularly limited as long as it is an insulating material that is transparent and has no electrical conductivity. However, the insulating layer 7 has adhesiveness to the connecting conductor wire 31 and the connecting transparent conductive film 41 disposed below and above the insulating layer 7. Higher ones are desired, and general thermosetting transparent resins such as epoxy and acrylic resins, and photocurable transparent resins can be used. The insulating layer 7 can be formed by applying such a transparent resin so as to cover the connection conductor wire 31 by a known coating method, screen printing method, ink jet printing method, or the like. Further, the insulating layer 7 can be formed using an inorganic insulating material such as silicon oxide by a PVD method such as a sputtering method, a vacuum evaporation method, or an ion plating method, a CVD method, or the like. In addition, the insulating layer 7 can also be formed by sticking a transparent film of polyester resin or the like on the one surface S of the substrate 2 so as to cover at least the connecting conductor wire 31. The thickness of the insulating layer 7 is not particularly limited, and can be, for example, about 0.1 μm to 50 μm. In addition, the outer shape of the insulating layer 7 is rectangular in FIG. 4, but is not limited thereto, and may be various shapes such as a polygonal shape and a circular shape.
接続用透明導電膜４１は、絶縁層７よりも幅は短い一方で長さが長く、絶縁層７の上面を横切るようにして、隣り合う第２電極セル４０の導体線Ｌ同士を電気的に接続している。よって、接続用導体線３１と接続用透明導電膜４１とは、間に絶縁層７が配置されることで、基板２の一方面Ｓ上で交差する際に互いに絶縁されている。また、接続用透明導電膜４１及び絶縁層７は透明であるので、タッチパネル１を上方又は下方から見た場合に、接続用透明導電膜４１及び絶縁層７の下方に形成された、第１電極３及び第２電極４の交差部分の接続用導体線３１による網目形状が確認できる。 The connecting transparent conductive film 41 is shorter than the insulating layer 7 but longer in length, and electrically connects the conductor lines L of the adjacent second electrode cells 40 so as to cross the upper surface of the insulating layer 7. Connected. Therefore, the connecting conductor line 31 and the connecting transparent conductive film 41 are insulated from each other when they intersect on the one surface S of the substrate 2 by disposing the insulating layer 7 therebetween. Since the transparent conductive film 41 for connection and the insulating layer 7 are transparent, the first electrode formed below the transparent conductive film 41 for connection and the insulating layer 7 when the touch panel 1 is viewed from above or below. The mesh shape of the connecting conductor wire 31 at the intersection of the third and second electrodes 4 can be confirmed.
接続用透明導電膜４１の材料としては、インジウム錫酸化物（ＩＴＯ）、酸化インジウム、アンチモン添加酸化錫、フッ素添加酸化錫、アルミニウム添加酸化亜鉛、カリウム添加酸化亜鉛、シリコン添加酸化亜鉛や、酸化亜鉛−酸化錫系、酸化インジウム−酸化錫系、酸化亜鉛−酸化インジウム−酸化マグネシウム系、酸化亜鉛、スズ酸化膜などの透明導電材料、あるいは、スズ、銅、アルミニウム、ニッケル、クロムなどの金属材料、金属酸化物材料を例示することができ、これら２種以上を複合して形成してもよい。また、カーボンナノチューブやカーボンナノホーン、カーボンナノワイヤ、カーボンナノファイバー、グラファイトフィブリルなどの極細導電炭素繊維、あるいは、Ａｇナノワイヤーなどの極細導電繊維をバインダーとして機能するポリマー材料に分散させた複合材を、接続用透明導電膜４１の材料として用いることもできる。ここでポリマー材料としては、ポリアニリン、ポリピロール、ポリアセチレン、ポリチオフェン、ポリフェニレンビニレン、ポリフェニレンスルフィド、ポリｐ−フェニレン、ポリ複素環ビニレン、PEDOT：poly(3,4-ethylenedioxythiophene)などの導電性ポリマーを採用することができる。接続用透明導電膜４１の形成方法は、スパッタリング法、真空蒸着法、イオンプレーティング法などのＰＶＤ法や、ＣＶＤ法、塗工法、印刷法などを例示することができる。また、接続用透明導電膜４１の厚みは、材料や形成方法により異なるが、塗工法や印刷法などを用いた場合は５０μｍ以下であることが好ましく、１０μｍ以下であることがより好ましい。 Examples of the material of the transparent conductive film 41 for connection include indium tin oxide (ITO), indium oxide, antimony-added tin oxide, fluorine-added tin oxide, aluminum-added zinc oxide, potassium-added zinc oxide, silicon-added zinc oxide, and zinc oxide. -Transparent conductive materials such as tin oxide, indium oxide-tin oxide, zinc oxide-indium oxide-magnesium oxide, zinc oxide, tin oxide film, or metal materials such as tin, copper, aluminum, nickel, chromium, Metal oxide materials can be exemplified, and two or more of these may be formed in combination. In addition, connecting ultrafine conductive carbon fibers such as carbon nanotubes, carbon nanohorns, carbon nanowires, carbon nanofibers and graphite fibrils, or composite materials in which ultrafine conductive fibers such as Ag nanowires are dispersed in a polymer material that functions as a binder It can also be used as a material for the transparent conductive film 41 for use. Here, a conductive polymer such as polyaniline, polypyrrole, polyacetylene, polythiophene, polyphenylene vinylene, polyphenylene sulfide, poly p-phenylene, polyheterocyclic vinylene, PEDOT: poly (3,4-ethylenedioxythiophene) should be adopted as the polymer material. Can do. Examples of the method for forming the transparent conductive film 41 for connection include PVD methods such as sputtering, vacuum deposition, and ion plating, CVD, coating, and printing. The thickness of the connecting transparent conductive film 41 varies depending on the material and the forming method, but is preferably 50 μm or less and more preferably 10 μm or less when a coating method or a printing method is used.
基板２の一方面Ｓ側には、透明な第１透明膜８及び第２透明膜９が、第１電極３及び第２電極４の各電極セル３０，４０の上方又は下方にそれぞれ重ね合わされるようにして設けられている。本実施形態では、第１電極セル３０が第１透明膜８により上方から覆われ、第２電極セル４０が第２透明膜９により上方から覆われている。第１透明膜８及び第２透明膜９は、第１電極３及び第２電極４の各電極セル３０，４０の外形と合うように、菱形状に形成されている。なお、第１透明膜８及び第２透明膜９は、必ずしも第１電極セル３０及び第２電極セル４０の外形と一致して第１電極セル３０及び第２電極セル４０の全面をぴったりと覆っている必要はなく、第１電極セル３０及び第２電極セル４０のほぼ全面を実質的に覆っていればよい。このように、第１電極３及び第２電極４の各電極セル３０，４０に対して第１透明膜８及び第２透明膜９を覆うなどして重ね合わせることで、基板２の一方面Ｓ上の各電極セル３０，４０及び接続用導体線３１によって形成された網目状パターンのほぼ全面が、透明な膜（接続用透明導電膜４１もしくは透明膜８）により重ね合わされることになる。 On the one surface S side of the substrate 2, a transparent first transparent film 8 and a second transparent film 9 are superimposed above or below the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, respectively. It is provided as such. In the present embodiment, the first electrode cell 30 is covered from above with the first transparent film 8, and the second electrode cell 40 is covered from above with the second transparent film 9. The first transparent film 8 and the second transparent film 9 are formed in a rhombus shape so as to match the outer shapes of the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4. Note that the first transparent film 8 and the second transparent film 9 do not necessarily coincide with the outer shapes of the first electrode cell 30 and the second electrode cell 40 and exactly cover the entire surfaces of the first electrode cell 30 and the second electrode cell 40. It is not necessary for the first electrode cell 30 and the second electrode cell 40 to substantially cover the entire surface. In this way, by overlapping the first transparent film 8 and the second transparent film 9 on the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, the one surface S of the substrate 2 is overlapped. Almost the entire surface of the mesh pattern formed by the upper electrode cells 30 and 40 and the connecting conductor line 31 is overlaid with a transparent film (the connecting transparent conductive film 41 or the transparent film 8).
このように構成すると、第１電極３及び第２電極４の各電極セル３０，４０が第１透明膜８及び第２透明膜９で重ね合わされていない場合と比べて、タッチパネル１を目視した際の色目の均一化を図ることができる。すなわち、第１電極３及び第２電極４の各電極セル３０，４０が第１透明膜８及び第２透明膜９で重ね合わされていない場合には、第１電極３及び第２電極４は、接続用透明導電膜４１が設けられている部分（交差部分）と設けられていない部分（電極セル部分）とで、色目（光線透過率）に違いが生じ、タッチパネル１の視認性に影響を与えるおそれがある。これに対して、第１電極３及び第２電極４の各電極セル３０，４０についても第１透明膜８及び第２透明膜９を重ね合わせることで、タッチパネル１の全体で色目の違いが目視ではほとんど区別できなくなるため、タッチパネル１の視認性をさらに優れたものとすることができる。なお、図４（及び図７〜図１１）においては、透明導電膜４１と第２透明膜９とを図面上識別可能なように、透明導電膜４１の輪郭を表示しているが、実際には透明導電膜４１の輪郭は図面のようにはっきりと現れるものではなく、透明導電膜４１を第２透明膜９と一体に形成すれば、透明導電膜４１の輪郭は現れない。 When comprised in this way, when each touch panel 1 is visually observed compared with the case where each electrode cell 30 and 40 of the 1st electrode 3 and the 2nd electrode 4 is not piled up by the 1st transparent film 8 and the 2nd transparent film 9. Can be made uniform. That is, when the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4 are not overlapped with the first transparent film 8 and the second transparent film 9, the first electrode 3 and the second electrode 4 are There is a difference in color (light transmittance) between the portion where the transparent conductive film for connection 41 is provided (intersection portion) and the portion where the transparent conductive film 41 is not provided (electrode cell portion), which affects the visibility of the touch panel 1. There is a fear. On the other hand, regarding the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, the first transparent film 8 and the second transparent film 9 are overlapped, so that the difference in color is visually observed on the entire touch panel 1. Since it becomes almost impossible to distinguish, the visibility of the touch panel 1 can be further improved. In FIG. 4 (and FIGS. 7 to 11), the outline of the transparent conductive film 41 is displayed so that the transparent conductive film 41 and the second transparent film 9 can be identified on the drawing. The outline of the transparent conductive film 41 does not appear clearly as shown in the drawing. If the transparent conductive film 41 is formed integrally with the second transparent film 9, the outline of the transparent conductive film 41 does not appear.
第１透明膜８及び第２透明膜９は、透明材料であれば、材料は特に限定されず、接続用透明導電膜４１と同じ材料で形成されていても異なる材料で形成されていてもよいが、接続用透明導電膜４１と同じ導電材料を用いて基板２の一方面Ｓ上に同時に形成することで、第１透明膜８及び第２透明膜９を効率よく形成できる。なお、この場合には、第２電極セル４０を覆う第２透明膜９を接続用透明導電膜４１と接続（一体に形成）させることが見た目向上の点でも好ましい。また、第１電極セル３０を覆う第１透明膜８については、接続用透明導電膜４１と絶縁するため、又は絶縁状態に近い高抵抗の状態とするために、例えば両者の間に隙間を設ける。 The first transparent film 8 and the second transparent film 9 are not particularly limited as long as they are transparent materials, and may be formed of the same material as the connection transparent conductive film 41 or a different material. However, the first transparent film 8 and the second transparent film 9 can be efficiently formed by simultaneously forming on the one surface S of the substrate 2 using the same conductive material as the transparent conductive film 41 for connection. In this case, connecting the second transparent film 9 covering the second electrode cell 40 with the connecting transparent conductive film 41 is preferable from the viewpoint of improving the appearance. In addition, the first transparent film 8 covering the first electrode cell 30 is provided with a gap, for example, in order to insulate it from the connecting transparent conductive film 41 or to have a high resistance state close to an insulating state. .
また、タッチパネル１の製造時に、第１電極３及び第２電極４の各電極セル３０，４０を構成する導体線Ｌに断絶部分がある場合、この断絶部分により抵抗が生じて電極の抵抗値が増大するが、第１透明膜８及び第２透明膜９が導電材料で形成されていて第１電極セル３及び第２電極セル４とそれぞれ導通していることで、この抵抗値の増加の影響を抑えることができる。加えて、第１電極３及び第２電極４の各電極セル３０，４０を構成する導体線Ｌの線幅の一部が細くなった場合でも、電極の抵抗値の増加を抑制することができる。 In addition, when the touch panel 1 is manufactured, if there is a disconnected portion in the conductor line L constituting each of the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, resistance is generated by the disconnected portion, and the resistance value of the electrode is reduced. Although it increases, since the first transparent film 8 and the second transparent film 9 are made of a conductive material and are electrically connected to the first electrode cell 3 and the second electrode cell 4, respectively, the influence of the increase in the resistance value. Can be suppressed. In addition, even when a part of the line width of the conductor line L constituting the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4 becomes thin, an increase in the resistance value of the electrode can be suppressed. .
次に、上記構成のタッチパネル１を製造する方法を説明する。まず、図５に示すように、基板２の一方面Ｓ上に、第１電極セル３０及び第２電極セル４０の導体線Ｌと接続用導体線３１とを形成する。基板２は、必要に応じて所望の形状にカットする。導体線Ｌ及び接続用導体線３１の形成方法は、（１）銀、金、白金、パラジウム、銅、カーボンなどの極微細な導電性粒子を含む導電性ペーストを基板２上にスクリーン印刷する方法（特開２００７−１４２３３４等参照）、（２）銅などの金属箔を基板２上に積層した後、金属箔上にレジストパターンを形成し、金属箔をエッチングする方法（特開２００８−３２８８４等参照）が挙げられる。また、導体線Ｌ及び接続用導体線３１の形成方法は、上記（１）、（２）の形成方法に限定されず、上記（１）以外のグラビア印刷やインクジェット印刷などの公知の印刷法や、上記（２）以外のフォトリソグラフィを使用してもよい。また、配線５，６は、導体線Ｌ及び接続用導体線３１と一緒に上記した方法で形成してもよいし、導体線Ｌ及び接続用導体線３１を形成した後、配線印刷用の導電インクを例えばスクリーン印刷などの公知の印刷方法を用いて基板２の一方面Ｓ上に印刷することで形成してもよい。 Next, a method for manufacturing the touch panel 1 having the above configuration will be described. First, as shown in FIG. 5, the conductor line L and the connecting conductor line 31 of the first electrode cell 30 and the second electrode cell 40 are formed on the one surface S of the substrate 2. The substrate 2 is cut into a desired shape as necessary. The method of forming the conductor wire L and the connecting conductor wire 31 is as follows: (1) Screen printing of a conductive paste containing ultrafine conductive particles such as silver, gold, platinum, palladium, copper, carbon, etc. on the substrate 2 (See Japanese Patent Laid-Open No. 2007-142334), (2) A method of etching a metal foil after forming a resist pattern on the metal foil after laminating a metal foil such as copper on the substrate 2 (Japanese Patent Laid-Open No. 2008-32884 etc.) Reference). Moreover, the formation method of the conductor wire L and the connection conductor wire 31 is not limited to the formation method of said (1) and (2), Well-known printing methods, such as gravure printing other than said (1), and inkjet printing, Photolithography other than the above (2) may be used. Further, the wirings 5 and 6 may be formed by the above-described method together with the conductor line L and the connection conductor line 31, or after the conductor line L and the connection conductor line 31 are formed, the conductive for wiring printing is formed. The ink may be formed by printing on one surface S of the substrate 2 using a known printing method such as screen printing.
そして、図６に示すように、絶縁層７を、基板２の一方面Ｓの少なくとも接続用導体線３１の一部を覆うようにして設けた後、絶縁層７の上面に接続用透明導電膜４１を形成すると同時に、第１電極セル３０及び第２電極セル４０上に第１透明膜８及び第２透明膜９を形成することで、図４に示すタッチパネル１が形成される。なお、図７に示すように、一端、絶縁層７の上面に接続用透明導電膜４１を形成した後、第１電極セル３０及び第２電極セル４０上に第１透明膜８及び第２透明膜９を形成することで、図４に示すタッチパネル１を形成してもよい。 Then, as shown in FIG. 6, after the insulating layer 7 is provided so as to cover at least a part of the connecting conductor line 31 on the one surface S of the substrate 2, the connecting transparent conductive film is formed on the upper surface of the insulating layer 7. At the same time as forming 41, the first transparent film 8 and the second transparent film 9 are formed on the first electrode cell 30 and the second electrode cell 40, thereby forming the touch panel 1 shown in FIG. 4. In addition, as shown in FIG. 7, after forming the transparent conductive film 41 for connection on the upper surface of the insulating layer 7 at one end, the first transparent film 8 and the second transparent film are formed on the first electrode cell 30 and the second electrode cell 40. The touch panel 1 shown in FIG. 4 may be formed by forming the film 9.
以上の構成を備えるタッチパネル１において、タッチ位置の検出方法は、従来の静電容量式のタッチパネルと同様であり、第１電極セル３０及び第２電極セル４０の接触位置において人体の静電容量に基づく電圧等の変化を検出することによって、接触位置の座標が演算される。 In the touch panel 1 having the above configuration, the method for detecting the touch position is the same as that of the conventional capacitive touch panel, and the capacitance of the human body at the contact position of the first electrode cell 30 and the second electrode cell 40 is determined. By detecting a change in voltage or the like based on the coordinates, the coordinates of the contact position are calculated.
本実施形態に係るタッチパネル１においては、複数の導体線Ｌを交差させることで網目状の電極３，４を形成しているので、基板２上に形成される電極パターンの低抵抗化を図ることができる。さらに、電極パターンを目立たせることなくかつ色目の相違による違和感も生じさせることがないので、タッチパネル１の視認性も向上させることができるため、静電容量式のタッチパネルとして好適に用いることができる。さらに、第１電極３及び第２電極４のいずれもが基板２の一方面Ｓに形成されているので、タッチパネル１の構造の簡略化と全体的な厚み・重さの軽減を実現できるという優位性を有する。 In the touch panel 1 according to the present embodiment, since the mesh-like electrodes 3 and 4 are formed by crossing a plurality of conductor lines L, the resistance of the electrode pattern formed on the substrate 2 is reduced. Can do. Furthermore, since the electrode pattern is not conspicuous and a sense of incongruity due to the difference in color does not occur, the visibility of the touch panel 1 can be improved, and therefore it can be suitably used as a capacitive touch panel. Further, since both the first electrode 3 and the second electrode 4 are formed on the one surface S of the substrate 2, the structure of the touch panel 1 can be simplified and the overall thickness and weight can be reduced. Have sex.
以上、本発明の一実施形態について説明したが、本発明の具体的な態様は上記実施形態に限定されない。例えば、上記実施形態においては、隣接する第１透明膜８と第２透明膜９との間には、直線状の隙間が形成されているが、図８に示すように、第１透明膜８の周縁のうちの、少なくとも隣接する第２透明膜９と対向する部分の周縁に、面方向、つまりは、周縁から外側に向けて延びる凸部８０を所定間隔をあけて複数並べるとともに、第２透明膜９の周縁のうちの、少なくとも隣接する第１透明膜８と対向する部分の周縁に、面方向、つまりは、周縁から外側に向けて延びる凸部９０を所定間隔をあけて複数並べることで、それぞれ凸部８０，９０と凹部８１，９１とが交互に並ぶ凹凸を形成することができる。そして、隣接する第１透明膜８と第２透明膜９との境界において、互いに多少の隙間をあけるようにして、凸部８０，９０を対向する凸部９０，８０の間の凹部９１，８１にそれぞれ配置し、凸部８０，９０及び凹部８１，９１を噛み合わせることで、隣接する第１透明膜８と第２透明膜９との隙間を透明膜８，９で埋めることができる。このように構成すると、隣接する第１透明膜８と第２透明膜９との間に直線状の隙間が形成される場合と比べて、タッチパネル１の全体をより精密に透明な膜（第１透明膜８、第２透明膜９及び接続用透明導電膜４１）で覆うことができ、透明な膜により覆われていない領域を少なくして色目の違いをなくすことができるため、タッチパネル１の視認性をさらに優れたものとすることができる。なお、凸部８０，９０は、凸部８０，９０が第１電極セル３０及び第２電極セル４０の張出線３２，４２上に位置して、張出線３２，４２が凸部８０，９０によって完全に覆われるように、第１透明膜８及び第２透明膜９に設けるのが好ましい。また、凸部８０，９０及び凹部８１，９１の形状は、上記のような矩形状のみならず、先端が鋭利に尖る三角形状（全体の凹凸形状としては、のこぎりの歯のような鋸歯状）や先端が丸い山形状（全体の凹凸形状としては、波形状）など、種々の形状とすることが可能である。 As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. For example, in the embodiment described above, a linear gap is formed between the adjacent first transparent film 8 and the second transparent film 9, but as shown in FIG. A plurality of convex portions 80 extending in the surface direction, that is, outward from the peripheral edge, are arranged at predetermined intervals on the peripheral edge of at least a portion of the peripheral edge facing the adjacent second transparent film 9, and the second A plurality of protrusions 90 extending in the surface direction, that is, from the periphery toward the outside, are arranged at predetermined intervals on the periphery of the portion of the periphery of the transparent film 9 facing at least the adjacent first transparent film 8. Thus, it is possible to form irregularities in which the convex portions 80 and 90 and the concave portions 81 and 91 are alternately arranged. Then, at the boundary between the adjacent first transparent film 8 and the second transparent film 9, the concave portions 91, 81 between the convex portions 90, 80 that face the convex portions 80, 90 so as to leave a slight gap therebetween. And the convex portions 80 and 90 and the concave portions 81 and 91 are engaged with each other, so that the gap between the adjacent first transparent film 8 and the second transparent film 9 can be filled with the transparent films 8 and 9. If comprised in this way, compared with the case where a linear clearance gap is formed between the 1st transparent film 8 and the 2nd transparent film 9 which adjoin, the whole touch panel 1 is transparent film (1st more precisely). Since it can be covered with the transparent film 8, the second transparent film 9, and the transparent conductive film for connection 41) and the area not covered with the transparent film can be reduced and the difference in color can be eliminated, the visual recognition of the touch panel 1 The property can be further improved. The protrusions 80 and 90 are located on the extension lines 32 and 42 of the first electrode cell 30 and the second electrode cell 40, and the extension lines 32 and 42 are the protrusions 80 and 90. It is preferable to provide the first transparent film 8 and the second transparent film 9 so as to be completely covered by 90. Moreover, the shape of the convex portions 80 and 90 and the concave portions 81 and 91 is not only the rectangular shape as described above, but also a triangular shape with sharply pointed tips (the entire concave-convex shape is a sawtooth shape such as a saw tooth). Further, various shapes such as a mountain shape with a rounded tip (a wave shape as the overall uneven shape) can be used.
また、上記実施形態においては、第１電極セル３０及び第２電極セル４０の導体線Ｌの線幅と、接続用導体線３１の線幅とが同じに形成されているが、接続用導体線３１の線幅を、第１電極セル３０及び第２電極セル４０の導体線Ｌの線幅と異なるように形成してもよい。 Moreover, in the said embodiment, although the line width of the conductor line L of the 1st electrode cell 30 and the 2nd electrode cell 40 and the line width of the connection conductor line 31 are formed, the connection conductor line The line width 31 may be different from the line width of the conductor line L of the first electrode cell 30 and the second electrode cell 40.
また、接続用導体線３１の線幅を第１電極セル３０及び第２電極セル４０の導体線Ｌの線幅よりも太く又は細く形成した場合において、第１電極セル３０及び第２電極セル４０の導体線Ｌの少なくとも一部（所々）の線幅を、接続用導体線３１の線幅と同じく太く又は細くするようにしてもよい。これにより、線幅が太く又は細くなった箇所が均一に配置されることで、見た目をより均一にできるため、電極のパターン形状をより一層目立ちにくくすることができ、タッチパネル１の視認性を向上させることができる。なお、第１電極セル３０の導体線Ｌの線幅と第２電極セル４０の導体線Ｌの線幅は厳密に同一でなくてもよいが、見た目の均一性の観点から略等しい線幅とすることが望ましい。 Further, when the line width of the connecting conductor line 31 is formed to be thicker or narrower than the line width of the conductor line L of the first electrode cell 30 and the second electrode cell 40, the first electrode cell 30 and the second electrode cell 40. The line width of at least a part (location) of the conductor line L may be as thick or narrow as the line width of the connecting conductor line 31. As a result, it is possible to make the appearance of the electrode more evenly conspicuous by improving the visibility of the touch panel 1 since the appearance of the electrode can be made more uniform by uniformly arranging the portions where the line width is thick or thin. Can be made. In addition, although the line width of the conductor line L of the 1st electrode cell 30 and the line width of the conductor line L of the 2nd electrode cell 40 may not be exactly the same, it is substantially equal line width from a viewpoint of the uniformity of appearance. It is desirable to do.
また、上記実施形態においては、基板２の一方面Ｓ上に、第１電極セル３０及び第２電極セル４０の導体線Ｌと接続用導体線３１とを形成した後、絶縁層７を設け、さらに、接続用透明導電膜４１、第１透明膜８及び第２透明膜９を設けている。これに限られることなく、基板２の一方面Ｓ上に、接続用透明導電膜４１、第１透明膜８及び第２透明膜９を設けた後、接続用透明導電膜４１上に絶縁層７を設け、絶縁層７上に接続用導体線３１が位置するとともに接続用透明導電膜４１により隣り合う第２電極セル４０の導体線Ｌ同士が電気的に接続されるように、第１電極セル３０及び第２電極セル４０の導体線Ｌと接続用導体線３１とを形成してもよい。この場合には、第１透明膜８及び第２透明膜９は、第１電極セル３及び第２電極セル４の下方に敷かれた状態でそれぞれ重ね合わされることになる。 Moreover, in the said embodiment, after forming the conductor wire L and the connection conductor wire 31 of the 1st electrode cell 30 and the 2nd electrode cell 40 on the one surface S of the board | substrate 2, the insulating layer 7 was provided, Furthermore, the transparent conductive film 41 for connection, the 1st transparent film 8, and the 2nd transparent film 9 are provided. Without being limited thereto, the connection transparent conductive film 41, the first transparent film 8, and the second transparent film 9 are provided on the one surface S of the substrate 2, and then the insulating layer 7 is formed on the connection transparent conductive film 41. The first electrode cell so that the connection conductor line 31 is located on the insulating layer 7 and the conductor lines L of the adjacent second electrode cells 40 are electrically connected by the connection transparent conductive film 41. 30 and the conductor line L of the second electrode cell 40 and the connecting conductor line 31 may be formed. In this case, the first transparent film 8 and the second transparent film 9 are overlaid in a state of being laid under the first electrode cell 3 and the second electrode cell 4, respectively.
また、上記実施形態では、第１電極セル３０及び第２電極セル４０の導体線Ｌや接続用導体線３１は真っ直ぐな直線状であるが、図９に示すように、波のような形の波形状や、図１０に示すように、のこぎりの歯のような形の鋸歯状など、種々の形状とすることができる。 Moreover, in the said embodiment, although the conductor wire L and the connection conductor wire 31 of the 1st electrode cell 30 and the 2nd electrode cell 40 are straight straight lines, as shown in FIG. Various shapes such as a wave shape and a sawtooth shape like a saw tooth as shown in FIG. 10 can be used.
また、上記実施形態では、第１電極セル３０及び第２電極セル４０の外形は、菱形状であるが、第１電極セル３０と第２電極セル４０との間で絶縁性が確保され、指などの接触ポイントを検出可能である限り、菱形状に限られることなく、矩形状、多角形状、円形状など、任意の形状とすることができる。 Moreover, in the said embodiment, although the external shape of the 1st electrode cell 30 and the 2nd electrode cell 40 is a rhombus shape, insulation is ensured between the 1st electrode cell 30 and the 2nd electrode cell 40, and a finger As long as a contact point such as can be detected, the shape is not limited to a diamond shape, and may be an arbitrary shape such as a rectangular shape, a polygonal shape, or a circular shape.
また、上記実施形態において、各電極３，４の両端部間での導通性を阻害しない範囲で、各電極セル３０，４０を構成する複数の導体線Ｌに対して、図１１に示すように、導体線Ｌを切断する切断部３３，４３を部分的に設けるように構成してもよい。上記したように、接続用導体線３１と第２電極セル４０の導体線Ｌとの間には隙間Ｏが形成されているため、各電極セル３０，４０にこのような切断部３３，４３を設けることにより、電極パターン全体に対して一様に導体線Ｌが途切れる断続部（空白部）が発生する。よって、光線透過率が向上するとともに、電極パターンの見た目をより均一にできるので、視認性をさらに向上させることができる。 Moreover, in the said embodiment, as shown in FIG. 11 with respect to the some conductor wire L which comprises each electrode cell 30 and 40 in the range which does not inhibit the electrical conductivity between the both ends of each electrode 3 and 4. As shown in FIG. The cutting portions 33 and 43 for cutting the conductor line L may be partially provided. As described above, since the gap O is formed between the connecting conductor line 31 and the conductor line L of the second electrode cell 40, such cut portions 33 and 43 are formed in the electrode cells 30 and 40, respectively. By providing, the intermittent part (blank part) which the conductor wire L interrupts | blocks uniformly with respect to the whole electrode pattern generate | occur | produces. Therefore, the light transmittance is improved and the appearance of the electrode pattern can be made more uniform, so that the visibility can be further improved.
また、第１電極セル３０と第２電極セル４０との隙間に、電極パターンとは電気的に独立したダミーパターンを形成することで、第１電極３及び第２電極４のパターン形状をより一層、目立ちにくくしてもよい。ダミーパターンは、接続用導体線３１や第１電極セル３０及び第２電極セル４０の導体線Ｌと略等しい線幅の導体線などで、均一な網目状となるように第１電極セル３０と第２電極セル４０との隙間を補完するパターンで形成する。 Further, by forming a dummy pattern electrically independent of the electrode pattern in the gap between the first electrode cell 30 and the second electrode cell 40, the pattern shape of the first electrode 3 and the second electrode 4 can be further increased. , May not be noticeable. The dummy pattern is a conductor line having a line width substantially equal to the conductor line L of the connection conductor line 31 or the first electrode cell 30 and the second electrode cell 40, and the first electrode cell 30 so as to have a uniform mesh shape. A pattern that complements the gap with the second electrode cell 40 is formed.
本発明のタッチパネルは、液晶ディスプレイや有機発光ダイオード（ＯＬＥＤ）ディスプレイ、電子発光（ＥＬ）ディスプレイなどの表示装置の表示面上にタッチパネルを装着したタッチパネル付きの表示装置として用いることができる。 The touch panel of the present invention can be used as a display device with a touch panel in which a touch panel is mounted on a display surface of a display device such as a liquid crystal display, an organic light emitting diode (OLED) display, and an electroluminescent (EL) display.
また、タッチパネル１の基板２として、光学等方性基板や光学位相性基板を用いることで、表示装置の構成内にタッチパネル１を備えた、所謂オンセルタイプのタッチパネル付きの表示装置とすることができる。例えば、オンセルタイプのタッチパネル付きの表示装置１０は、図１２に示すように、バックライト１１と、液晶ディスプレイ１２と、タッチパネル１とを備えた構成のものを例示できる。液晶ディスプレイパネル１２は、通常、偏光板１３と、ＴＦＴ素子基板１４と、液晶層１５と、カラーフィルタ基板１６と、偏向板１７とが積層された構成であるが、タッチパネル１は液晶ディスプレイパネル１２の表面側（図示例では上側）の偏光板１７の下側に配置されて構成される。液晶ディスプレイパネル１２の背面側（図示例では下側）の偏光板１３にバックライト１１が装着されている。偏光板１７の表面には、保護するためのカバーフィルム１８が装着されている。 In addition, by using an optically isotropic substrate or an optical phase substrate as the substrate 2 of the touch panel 1, a display device with a so-called on-cell type touch panel provided with the touch panel 1 in the configuration of the display device is provided. it can. For example, the on-cell type display device 10 with a touch panel can be exemplified by a configuration including a backlight 11, a liquid crystal display 12, and a touch panel 1, as shown in FIG. The liquid crystal display panel 12 usually has a configuration in which a polarizing plate 13, a TFT element substrate 14, a liquid crystal layer 15, a color filter substrate 16, and a deflecting plate 17 are laminated, but the touch panel 1 is a liquid crystal display panel 12. Are arranged below the polarizing plate 17 on the surface side (upper side in the illustrated example). A backlight 11 is mounted on a polarizing plate 13 on the back side (lower side in the illustrated example) of the liquid crystal display panel 12. A cover film 18 for protection is attached to the surface of the polarizing plate 17.
上記した光学等方性基板や光学位相性基板は、リタデーション値が０ｎｍ〜８００ｎｍであることが好ましく、０ｎｍ〜６００ｎｍであることがさらに好ましい。リタデーションは、例えば王子計測機器株式会社製の位相差測定装置ＫＯＢＲＡ−ＷＲなどを用いて測定できる。また上記した光学等方性基板や光学位相性基板の材料としては、脂肪族環状ポリオレフィン、ノルボルネン系の熱可塑性透明樹脂などが例示できる。 The above-mentioned optically isotropic substrate and optical phase-difference substrate preferably have a retardation value of 0 nm to 800 nm, and more preferably 0 nm to 600 nm. Retardation can be measured using, for example, a phase difference measuring device KOBRA-WR manufactured by Oji Scientific Instruments. Examples of the materials for the optically isotropic substrate and the optical phased substrate include aliphatic cyclic polyolefins and norbornene-based thermoplastic transparent resins.
上記した表示装置は、携帯電話、スマートフォン、タブレットデバイス、ノート型パソコン、ディスプレイ一体型パソコン、カーナビゲーションシステム、ゲーム機器、ＰＯＳ端末などのタッチ操作する電子機器に好適に用いられる。 The display device described above is suitably used for electronic devices that perform touch operations such as mobile phones, smartphones, tablet devices, notebook computers, display-integrated computers, car navigation systems, game devices, and POS terminals.
１ タッチパネル
２ 基板
３ 第１電極
４ 第２電極
７ 絶縁層
８ 第１透明膜
９ 第２透明膜
１０ タッチパネル機能付き表示装置
３０ 第１電極セル
３１ 接続用導体線
３３ 切断部
４０ 第２電極セル
４１ 接続用透明導電膜
４３ 切断部
Ｌ 導体線
DESCRIPTION OF SYMBOLS 1 Touch panel 2 Board | substrate 3 1st electrode 4 2nd electrode 7 Insulating layer 8 1st transparent film 9 2nd transparent film 10 Display apparatus with a touch panel function 30 1st electrode cell 31 Conducting wire 33 Cutting part 40 2nd electrode cell 41 Transparent conductive film for connection 43 Cutting part L Conductor wire
Claims (10)
前記第１電極は、複数の導体線を交差させることで形成された複数の第１電極セルと、隣り合う前記第１電極セルの前記導体線同士を電気的に接続する少なくとも１本の接続用導体線と、からなり、
前記第２電極は、複数の導体線を交差させることで形成された複数の第２電極セルと、隣り合う前記第２電極セルの前記導体線同士を電気的に接続する接続用透明導電膜と、からなり、
前記接続用導体線及び前記接続用透明導電膜の間に介在して、前記接続用導体線と前記接続用透明導電膜とを絶縁する絶縁層と、
前記第１電極セル及び前記第２電極セルの上方又は下方にそれぞれ重ね合わされる第１透明膜及び第２透明膜と、をさらに備えるタッチパネル。 A substrate, a plurality of first electrodes arranged at intervals in a first direction on one side of the substrate, and a second direction intersecting the first direction on one side of the substrate. A plurality of second electrodes arranged, and a touch panel comprising:
The first electrode is for at least one connection for electrically connecting a plurality of first electrode cells formed by crossing a plurality of conductor lines and the conductor lines of the adjacent first electrode cells. A conductor wire,
The second electrode includes a plurality of second electrode cells formed by intersecting a plurality of conductor lines, and a connecting transparent conductive film that electrically connects the conductor lines of the adjacent second electrode cells. Consists of
An insulating layer interposed between the connection conductor wire and the connection transparent conductive film to insulate the connection conductor wire and the connection transparent conductive film;
A touch panel further comprising: a first transparent film and a second transparent film that are overlaid above or below the first electrode cell and the second electrode cell, respectively.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013109267A JP6084117B2 (en) | 2013-05-23 | 2013-05-23 | Touch panel, display device and electronic device |
| TW103116283A TWI552038B (en) | 2013-05-08 | 2014-05-07 | Touch panels, display devices and electronic devices |
| CN201420235650.XU CN203950288U (en) | 2013-05-08 | 2014-05-08 | Contact panel, display device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013109267A JP6084117B2 (en) | 2013-05-23 | 2013-05-23 | Touch panel, display device and electronic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2014229136A JP2014229136A (en) | 2014-12-08 |
| JP6084117B2 true JP6084117B2 (en) | 2017-02-22 |
Family
ID=52128917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013109267A Expired - Fee Related JP6084117B2 (en) | 2013-05-08 | 2013-05-23 | Touch panel, display device and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6084117B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6612075B2 (en) * | 2015-07-23 | 2019-11-27 | 株式会社ジャパンディスプレイ | Display device, input device, and method of manufacturing display device |
| JP2017059171A (en) * | 2015-09-18 | 2017-03-23 | 日立化成株式会社 | Electrostatic capacitance type touch panel |
| CN105717685A (en) | 2016-04-13 | 2016-06-29 | 京东方科技集团股份有限公司 | Cassette aligning substrate, preparation method thereof and touch display panel |
| JP2017207906A (en) * | 2016-05-18 | 2017-11-24 | 日立化成株式会社 | Capacitance touch panel and manufacture method therefor |
| JP2017211803A (en) * | 2016-05-25 | 2017-11-30 | 三菱電機株式会社 | Touch panel and manufacturing method therefor |
| KR102618597B1 (en) * | 2016-10-31 | 2023-12-27 | 엘지디스플레이 주식회사 | Flexible Touch Panel and Organic Light Emitting Display Device Using the Same |
| KR102325815B1 (en) | 2017-06-01 | 2021-11-12 | 엘지디스플레이 주식회사 | Sensing unit for touch sensing, display including sensing unit and manufacturing method for the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3182342B2 (en) * | 1996-07-05 | 2001-07-03 | 廣瀬 徳三 | Foreign currency converter |
| WO2011078231A1 (en) * | 2009-12-24 | 2011-06-30 | 日本写真印刷株式会社 | Capacitance type touch sensor, electronic device, and method of manufacturing transparent conductive-film laminate |
| KR101663210B1 (en) * | 2010-04-28 | 2016-10-06 | 주식회사 동진쎄미켐 | Touch panel and method for manufacturing the same |
| WO2012099394A2 (en) * | 2011-01-19 | 2012-07-26 | Lg Innotek Co., Ltd. | Touch panel and method for manufacturing the same |
-
2013
- 2013-05-23 JP JP2013109267A patent/JP6084117B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014229136A (en) | 2014-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6084117B2 (en) | Touch panel, display device and electronic device | |
| TWI552038B (en) | Touch panels, display devices and electronic devices | |
| JP5253288B2 (en) | Planar body and touch switch | |
| TWI444862B (en) | Face and touch switch | |
| JP6177072B2 (en) | Manufacturing method of touch panel | |
| US20140267953A1 (en) | Touch screen panel and method of manufacturing the same | |
| US10496232B2 (en) | Capacitive touch panel | |
| JP6138059B2 (en) | Touch panel | |
| JP5472858B2 (en) | Touch switch | |
| US10222915B2 (en) | Input device and method of manufacturing it | |
| KR102335116B1 (en) | Touch screen pannel and manufacturing method thereof | |
| KR102207143B1 (en) | Touch panel and manufacturing method thereof | |
| JP2011028699A (en) | Capacitance type touch panel structure | |
| JP5591094B2 (en) | Touch switch | |
| JP6180174B2 (en) | Touch panel, display device and electronic device | |
| CN109791453A (en) | The preparation method of touch sensing and the preparation method of display screen component | |
| JP2012079169A (en) | Detection substrate and manufacturing method for the same | |
| JP6134968B2 (en) | Display device | |
| JP6127251B2 (en) | Touch panel | |
| JP6134965B2 (en) | Touch panel device | |
| JP2012226498A (en) | Touch switch | |
| KR20140018669A (en) | The manufacturing method of touch panel with improved insulating layer | |
| KR102093940B1 (en) | Touch panel | |
| JP2014035615A (en) | Touch panel | |
| WO2015083336A1 (en) | Touch panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20160224 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20161220 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20170104 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20170124 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6084117 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |