JP4678431B2 - Touch panel - Google Patents

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JP4678431B2
JP4678431B2 JP2008269556A JP2008269556A JP4678431B2 JP 4678431 B2 JP4678431 B2 JP 4678431B2 JP 2008269556 A JP2008269556 A JP 2008269556A JP 2008269556 A JP2008269556 A JP 2008269556A JP 4678431 B2 JP4678431 B2 JP 4678431B2
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wiring
detection
wirings
touch panel
row
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JP2010097536A (en
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直紀 中川
将史 上里
岳 大野
勲 野尻
博之 村井
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2008269556A priority Critical patent/JP4678431B2/en
Priority to US12/553,659 priority patent/US8269744B2/en
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Priority to US13/550,737 priority patent/US8390598B2/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display

Description

この発明は、ＬＣＤやＣＲＴなどの表示装置上に装着されるタッチパネルに関するものである。   The present invention relates to a touch panel mounted on a display device such as an LCD or CRT.

従来のタッチパネルとして、薄い透明な誘電膜の表面に間隔をおいて平行に配列された第１の検出配線と、前記誘電膜の裏面に間隔をおいて平行に配列され、前記第１の検出配線と直交するように配置された第２の検出配線とを備え、この第１および第２の検出配線を酸化インジウムなどの透明材料や、銀などの不透明な導電性材料で形成したものがある（例えば、特許文献１参照）。   As a conventional touch panel, a first detection wiring arranged in parallel with a gap on the surface of a thin transparent dielectric film, and a first detection wiring arranged in parallel with a gap on the back surface of the dielectric film. And a second detection wiring arranged so as to be orthogonal to the first detection wiring, and the first and second detection wirings are formed of a transparent material such as indium oxide or an opaque conductive material such as silver ( For example, see Patent Document 1).

特表平９−５１１０８６号公報（第８〜１０頁、図１、図２ａ）JP 9-51186 A (pages 8 to 10, FIGS. 1 and 2a)

上述のようなタッチパネルにおいて、第１および第２の検出配線を透明材料で形成した場合、視認性の高いタッチパネルを得ることができるが、上述のような透明材料は電気抵抗が高いので、応答速度が低下するという問題があった。この点を解消するため、第１および第２の検出配線を銀などの不透明な導電性材料で形成したものが提案されているが、この場合、検出配線が存在する部分と存在しない部分とで光の透過率に差が生じるため、光の透過率の周期的な変化によって表示ムラが発生するという問題があった。また、このようなタッチパネルを表示装置に装着すると、上記のような光の透過率の周期的な変化と周期的に配列された表示装置の画素との干渉によりモアレが発生するという問題があった。   In the touch panel as described above, when the first and second detection wirings are formed of a transparent material, a touch panel with high visibility can be obtained. However, since the transparent material as described above has high electric resistance, the response speed is high. There was a problem that decreased. In order to solve this problem, the first and second detection wirings formed of an opaque conductive material such as silver have been proposed. In this case, the detection wiring is divided into a portion where the detection wiring is present and a portion where the detection wiring is not present. Since there is a difference in the light transmittance, there is a problem that display unevenness occurs due to a periodic change in the light transmittance. Further, when such a touch panel is mounted on a display device, there has been a problem that moire occurs due to interference between the periodic change in the light transmittance as described above and the pixels of the display device arranged periodically. .

この発明は上記のような問題を解決するためになされたもので、応答速度が速く、表示ムラやモアレを低減できるタッチパネルを得るものである。   The present invention has been made to solve the above-described problems, and provides a touch panel that has a high response speed and can reduce display unevenness and moire.

この発明に係るタッチパネルは、タッチ面を有する透明基板と、前記透明基板のタッチ面と反対面に設けられ、行方向に間隔をおいて複数配列された不透明な導電性材料からなる第１配線と、前記第１配線と絶縁層を介して設けられ、列方向に間隔をおいて複数配列された不透明な導電性材料からなる第２配線と、前記第１配線と前記第２配線とによって囲まれた複数の領域にそれぞれ配置された不透明な導電性材料からなる第３配線とを備えたものである。   A touch panel according to the present invention includes a transparent substrate having a touch surface, and a first wiring made of an opaque conductive material provided on a surface opposite to the touch surface of the transparent substrate and arranged in a row direction at intervals. The second wiring made of an opaque conductive material provided via the first wiring and the insulating layer and arranged in a row in the column direction, and surrounded by the first wiring and the second wiring. And a third wiring made of an opaque conductive material disposed in each of the plurality of regions.

この発明によれば、応答速度が速く、表示ムラやモアレを低減でき、視認性が高くて大型化が容易なタッチパネルを得ることができる。   According to the present invention, it is possible to obtain a touch panel that has a high response speed, can reduce display unevenness and moire, has high visibility, and can be easily enlarged.

実施の形態１．
図１はこの発明の実施の形態１におけるタッチパネルの全体構成を示す平面図である。また、図２は図１におけるＡ部の拡大図であり、この発明の実施の形態１におけるタッチパネルの配線パターンの一部を示す平面図、図３はこの発明の実施形態１におけるタッチパネルとコントローラ基板との接続を示す平面図、図４はこの発明の実施の形態１におけるタッチパネルの層構造を模式的に示す斜視図である。 Embodiment 1 FIG.
1 is a plan view showing an overall configuration of a touch panel according to Embodiment 1 of the present invention. 2 is an enlarged view of a portion A in FIG. 1, and is a plan view showing a part of the wiring pattern of the touch panel according to Embodiment 1 of the present invention. FIG. 3 is a touch panel and controller board according to Embodiment 1 of the present invention. FIG. 4 is a perspective view schematically showing the layer structure of the touch panel according to Embodiment 1 of the present invention.

まず、図１ないし図３を用いてタッチパネルの平面方向の構成について説明する。
図１においてタッチパネル１は、タッチ面を有する透明基板２と、この透明基板２のタッチ面と反対側の面上に行方向（図１中のＸ方向）に所定の間隔をおいて複数配列され、列方向（図１中のＹ方向）に直線状に伸びる検出用列配線３（第１配線）と、列方向に所定の間隔をおいて複数配列され、行方向に直線状に伸び検出用列配線３と直交する検出用行配線４（第２配線）とを備えている。なお、図１においては、検出用列配線３と検出用行配線４は互いに直交して配置されているが、これらの両配線は交差して配置されていればよく、必ずしも直交している必要はない。 First, the configuration of the touch panel in the planar direction will be described with reference to FIGS. 1 to 3.
In FIG. 1, a plurality of touch panels 1 are arranged in a row direction (X direction in FIG. 1) at a predetermined interval on a transparent substrate 2 having a touch surface and a surface opposite to the touch surface of the transparent substrate 2. A plurality of detection column wirings 3 (first wirings) that extend linearly in the column direction (Y direction in FIG. 1) and a plurality of arrays arranged at predetermined intervals in the column direction, and for detection of linear extension in the row direction The row wiring 4 for detection (2nd wiring) orthogonal to the column wiring 3 is provided. In FIG. 1, the detection column wiring 3 and the detection row wiring 4 are arranged orthogonal to each other. However, these two wirings need only be arranged so as to intersect each other, and need not be orthogonal. There is no.

そして、所定本数（図１においては５本）の検出用列配線３の両端が接続用配線５によって電気的に短絡され、一束の列方向束配線６が構成している。同様に、所定本数（図１においては５本）の検出用行配線４の両端が接続用配線５によって電気的に短絡され、一束の行方向束配線７が構成している。
なお、検出用列配線３および検出用行配線４（以下、検出用列配線および検出用行配線を併せて「検出用配線」という）の配列間隔は０．１〜１ｍｍの範囲であることが望ましい。 Then, both ends of a predetermined number (five in FIG. 1) of detection column wirings 3 are electrically short-circuited by the connection wiring 5 to constitute a bundle of column-direction bundle wirings 6. Similarly, both ends of a predetermined number (five in FIG. 1) of detection row wirings 4 are electrically short-circuited by the connection wiring 5 to form a bundle of row-direction bundle wirings 7.
The arrangement interval of the detection column wiring 3 and the detection row wiring 4 (hereinafter, the detection column wiring and the detection row wiring are collectively referred to as “detection wiring”) is in the range of 0.1 to 1 mm. desirable.

さらに、所定本数の列方向束配線６が行方向に間隔をおいて平行に配列され、同様に、所定本数の行方向束配線７が列方向に間隔をおいて平行に配列されることによって、所定本数の列方向束配線６と行方向束配線７によって透明基板２上が複数のエリアに分割されるように構成されている。
なお、列方向束配線６および行方向束配線７の本数、および列方向束配線６と行方向束配線７を構成する検出用配線３、４の本数はタッチパネルの要求分解能から適宜決定される。 Furthermore, a predetermined number of column-direction bundle wirings 6 are arranged in parallel in the row direction at intervals, and similarly, a predetermined number of row-direction bundle wirings 7 are arranged in parallel in the column direction at intervals. The transparent substrate 2 is divided into a plurality of areas by a predetermined number of column-direction bundle wires 6 and row-direction bundle wires 7.
Note that the number of the column-direction bundle wiring 6 and the row-direction bundle wiring 7 and the number of the detection wirings 3 and 4 constituting the column-direction bundle wiring 6 and the row-direction bundle wiring 7 are appropriately determined from the required resolution of the touch panel.

そして、図２に図１のＡ部を拡大して示すように、検出用列方向配線３と検出用行方向配線４とによって囲まれた複数の領域にダミー配線である孤立配線８ａ、８ｂ（第３配線）が配置されている。この孤立配線８ａ、８ｂは、所定の寸法で分断されており、検出用配線３、４とは電気的に絶縁された状態で形成されている。また、孤立配線８ａ、８ｂは、検出用列配線３と平行に配置されており、孤立配線８ａ、８ｂを含めた配線間のピッチは、後述するＬＣＤやＣＲＴなどの表示装置の表示画素ピッチの整数倍とならないように配列されている。   Then, as shown in an enlarged view of part A in FIG. 2, isolated wirings 8a and 8b (dummy wirings) in a plurality of regions surrounded by the detection column direction wiring 3 and the detection row direction wiring 4 are shown in FIG. Third wiring) is arranged. The isolated wirings 8a and 8b are separated by a predetermined size and are formed in a state of being electrically insulated from the detection wirings 3 and 4. The isolated wirings 8a and 8b are arranged in parallel with the detection column wiring 3, and the pitch between the wirings including the isolated wirings 8a and 8b is the display pixel pitch of a display device such as an LCD or CRT described later. Arranged so as not to be an integer multiple.

本実施の形態においては、検出用列配線３、検出用行配線４および孤立配線８ａ、８ｂはアルミニウム合金製であって、そのタッチ面２ａ側の表面に窒化アルミニウム膜を形成しているが、検出用列配線３、検出用行配線４および孤立配線８ａ、８ｂの材料はこれに限るものではなく、酸化インジウム等の透明導電膜よりも導電率の高い膜であればよく、厚膜化ができれば、配線幅を広げずに低抵抗化でき、タッチパネルも大型化できるので、金属シリサイドや窒化チタン（ＴｉＮ）、窒化アルミニウム（ＡｌＮ）等の金属間化合物で形成してもよい。なお、本実施の形態においては検出用列配線３、検出用行配線４および孤立配線８ａ、８ｂはすべて同一線幅であって、その配線幅は１０μｍ以下であることが望ましい。   In the present embodiment, the detection column wiring 3, the detection row wiring 4, and the isolated wiring 8a, 8b are made of an aluminum alloy, and an aluminum nitride film is formed on the surface on the touch surface 2a side. The material of the detection column wiring 3, the detection row wiring 4 and the isolated wirings 8a and 8b is not limited to this, and any material having higher conductivity than a transparent conductive film such as indium oxide may be used. If possible, the resistance can be reduced without increasing the wiring width, and the touch panel can be enlarged. Therefore, the touch panel may be formed of an intermetallic compound such as metal silicide, titanium nitride (TiN), or aluminum nitride (AlN). In this embodiment, the detection column wiring 3, the detection row wiring 4, and the isolated wirings 8a and 8b are all the same line width, and the wiring width is preferably 10 μm or less.

また、後述するように孤立配線８ａと８ｂは異なる層に形成されており、同じ層に形成された孤立配線８ａ同士または８ｂ同士が隣接しないように孤立配線８ａと８ｂとは交互に検出用列方向配線３と検出用行方向配線４で囲まれる領域に配置されている。   Further, as will be described later, the isolated wirings 8a and 8b are formed in different layers, and the isolated wirings 8a and 8b are alternately arranged for detection so that the isolated wirings 8a or 8b formed in the same layer are not adjacent to each other. They are arranged in a region surrounded by the direction wiring 3 and the detection row direction wiring 4.

なお、孤立配線８ａ、８ｂの配置パターンは図２に示す形態に限られるものではなく、孤立配線８ａ、８ｂは検出用行配線４と平行に配置してもよいし、検出用列配線３または検出用行配線４と垂直に配置してもよく、これらを混在させてもよい。また、光の透過率の設定値に応じて孤立配線８ａ、８ｂの配線長さや配置個数等は適宜変更してもよく、さらに、孤立配線は８ａ、８ｂを線状でなく点状とすることもできる。   The arrangement pattern of the isolated wirings 8a and 8b is not limited to the form shown in FIG. 2, and the isolated wirings 8a and 8b may be arranged in parallel with the detection row wiring 4, or the detection column wiring 3 or They may be arranged perpendicular to the detection row wiring 4 or may be mixed. Further, the wiring lengths and the number of arrangements of the isolated wirings 8a and 8b may be appropriately changed according to the set value of the light transmittance. Further, the isolated wirings have the 8a and 8b made dotted instead of linear. You can also.

そして、列方向束配線６および行方向束配線７は、接続用配線５に電気的に接続された引き出し配線９を介して端子１０と電気的に接続されている。図３に示すように、この端子１０にはＡＣＦ（Ａｎｉｓｏｔｒｏｐｉｃ Ｃｏｎｄｕｃｔｉｖｅ Ｆｉｌｍ）等で形成されたＦＰＣ（Ｆｌｅｘｉｂｌｅ Ｐｒｉｎｔｅｄ Ｃｉｒｃｕｉｔ）１１の端子が接続される。そして、ＦＰＣ１１は検出処理回路１２を搭載したコントローラ基板１３と電気的に接続されている。   The column-direction bundle wiring 6 and the row-direction bundle wiring 7 are electrically connected to the terminal 10 via the lead-out wiring 9 electrically connected to the connection wiring 5. As shown in FIG. 3, the terminal 10 is connected to a terminal of an FPC (Flexible Printed Circuit) 11 formed of an ACF (Anisotropic Conductive Film) or the like. The FPC 11 is electrically connected to the controller board 13 on which the detection processing circuit 12 is mounted.

次に図４を用いて、タッチパネルの厚み方向の構成を説明する。
図４は、タッチパネルの厚み方向の構成を模式的に示した図であり、図４においてタッチパネル１の最表面層は、透明なガラス材料または透明な樹脂からなる矩形状の透明基板２で構成されており、表面にタッチ面２ａが形成されている。この透明基板２のタッチ面２ａと反対面に、検出用列配線３が所定の間隔をおいて行方向に複数配列されている。さらにその下面には、検出用列配線３を覆うように、シリコン窒化膜やシリコン酸化膜等からなる透明な絶縁層である層間絶縁膜１４が形成され、この層間絶縁膜１４の下面に検出用行配線４が所定の間隔をおいて列方向に複数配列されている。さらに、その下面には、検出用行配線４を保護するための保護膜１５が形成されている。なお、検出用列配線３と検出用行配線４が形成されている層を反対にして、透明基板２の裏面に検出用行配線４を形成し、層間絶縁膜１４の下面に検出用列配線３を形成してもよい。 Next, the configuration in the thickness direction of the touch panel will be described with reference to FIG.
FIG. 4 is a diagram schematically showing the configuration in the thickness direction of the touch panel. In FIG. 4, the outermost surface layer of the touch panel 1 is configured by a rectangular transparent substrate 2 made of a transparent glass material or a transparent resin. The touch surface 2a is formed on the surface. On the surface opposite to the touch surface 2a of the transparent substrate 2, a plurality of detection column wirings 3 are arranged in the row direction at a predetermined interval. Further, an interlayer insulating film 14 which is a transparent insulating layer made of a silicon nitride film, a silicon oxide film or the like is formed on the lower surface so as to cover the detection column wiring 3. A plurality of row wirings 4 are arranged in the column direction at a predetermined interval. Further, a protective film 15 for protecting the detection row wiring 4 is formed on the lower surface. The layers in which the detection column wiring 3 and the detection row wiring 4 are formed are reversed, the detection row wiring 4 is formed on the back surface of the transparent substrate 2, and the detection column wiring is formed on the lower surface of the interlayer insulating film 14. 3 may be formed.

ここで、図４には図示していないが、孤立配線８ａは検出用列配線３が形成されている層に、孤立配線８ｂは検出用行配線４が形成されている層にそれぞれ形成されている。
また、保護膜１５の下面にＬＣＤやＣＲＴなどの表示装置（図示せず）が配置される。 Although not shown in FIG. 4, the isolated wiring 8a is formed in a layer where the detection column wiring 3 is formed, and the isolated wiring 8b is formed in a layer where the detection row wiring 4 is formed. Yes.
A display device (not shown) such as an LCD or CRT is disposed on the lower surface of the protective film 15.

次にタッチパネルの動作について説明する。タッチパネル１の最表面を構成する透明基板２のタッチ面２ａの任意の位置を指等の指示体でタッチすると、指示体と検出用列配線３または検出用行配線４との間に静電容量が形成される。この静電容量の変化が生じた位置（座標）はコントローラ基板１３上に搭載された検出処理回路１２で算出され、この検出処理回路１２によって算出された指示体のタッチ位置の座標値が外部のコンピュータ（図示せず）等に出力される。   Next, the operation of the touch panel will be described. When an arbitrary position on the touch surface 2a of the transparent substrate 2 constituting the outermost surface of the touch panel 1 is touched with an indicator such as a finger, a capacitance is generated between the indicator and the detection column wiring 3 or the detection row wiring 4. Is formed. The position (coordinates) where the capacitance change occurs is calculated by the detection processing circuit 12 mounted on the controller board 13, and the coordinate value of the touch position of the indicator calculated by the detection processing circuit 12 is the external value. It is output to a computer (not shown) or the like.

ここで、検出用列配線３と検出用行配線４とによって囲まれた複数の領域にダミー配線である孤立配線８ａ、８ｂをそれぞれ配置したことによって、不透明な導電性材料で検出用列配線３と検出用行配線４を形成しても、タッチパネル全体の光の透過率が均一化されるため、応答速度を低下することなくタッチパネルの表示ムラが大幅に低減でき、視認性の高いタッチパネルを得ることができる。しかも、孤立配線８ａ、８ｂは検出用配線３，４と電気的に絶縁されているので、検出用配線３、４の配列間隔を大きくして検出用配線３、４の密度を疎にすることによって、配線の寄生容量を小さくでき、配線遅延を抑制できる。   Here, the isolated wirings 8a and 8b, which are dummy wirings, are arranged in a plurality of regions surrounded by the detection column wirings 3 and the detection row wirings 4, so that the detection column wirings 3 are made of an opaque conductive material. Even if the detection row wiring 4 is formed, the light transmittance of the entire touch panel is made uniform, so that the display unevenness of the touch panel can be greatly reduced without lowering the response speed, and a touch panel with high visibility is obtained. be able to. Moreover, since the isolated wirings 8a and 8b are electrically insulated from the detection wirings 3 and 4, the arrangement intervals of the detection wirings 3 and 4 are increased to make the density of the detection wirings 3 and 4 sparse. Thus, the parasitic capacitance of the wiring can be reduced, and the wiring delay can be suppressed.

また、検出用列配線３と検出用行配線４とによって囲まれる複数の領域に孤立配線８ａ、８ｂをそれぞれ配置し、この孤立配線８ａ、８ｂを含めた配線間のピッチを、ＬＣＤやＣＲＴなどの表示装置の画素ピッチの整数倍とならないようにしたので、表示部の画素ピッチと検出用配線３、４の配線ピッチとの干渉によるモアレが低減される。   Further, isolated wirings 8a and 8b are respectively arranged in a plurality of regions surrounded by the detection column wiring 3 and the detection row wiring 4, and the pitch between the wirings including the isolated wirings 8a and 8b is set to an LCD, a CRT, or the like. Therefore, moire due to interference between the pixel pitch of the display unit and the wiring pitch of the detection wirings 3 and 4 is reduced.

また、孤立配線８ａ、８ｂを検出用列配線３と平行に配置したので、タッチパネルの光の透過率の均一化を一層図ることができるとともに、孤立配線８ａ、８ｂの製造が容易になる。   Further, since the isolated wirings 8a and 8b are arranged in parallel with the detection column wiring 3, the light transmittance of the touch panel can be further uniformed and the isolated wirings 8a and 8b can be easily manufactured.

さらに、検出用配線３、４の両端を複数本毎に接続用配線５で短絡することによって束配線６、７を構成したので、束配線６または７内の１本の検出用配線３または４が断線しても他の検出用配線によって、タッチ位置の静電容量の変化を検知でき、信頼性の高いタッチ位置検出が可能となる。   Further, since the bundle wirings 6 and 7 are configured by short-circuiting both ends of the detection wirings 3 and 4 with the connection wiring 5 every plurality, the single detection wiring 3 or 4 in the bundle wiring 6 or 7 is configured. Even if the wire is disconnected, the change in the capacitance at the touch position can be detected by another detection wiring, and the touch position can be detected with high reliability.

また、検出用配線３，４をアルミニウム合金で形成したので、これらの配線の電気抵抗を低くでき、その結果、応答速度が速く、大型化が容易なタッチパネルを得ることができる。   In addition, since the detection wirings 3 and 4 are formed of an aluminum alloy, the electrical resistance of these wirings can be lowered, and as a result, a touch panel with a high response speed and easy size increase can be obtained.

さらに、アルミニウム合金製の検出用配線３、４および孤立配線８ａ、８ｂのタッチ面２ａ側にアルミニウム合金よりも光の反射率の低い窒化アルミニウムの膜で形成したので、タッチパネルの表示ムラはより低減される。   Further, since the aluminum alloy detection wirings 3 and 4 and the isolated wirings 8a and 8b are formed of an aluminum nitride film having a light reflectance lower than that of the aluminum alloy, the display unevenness of the touch panel is further reduced. Is done.

また、検出用配線３、４および孤立配線８ａ、８ｂの配線幅を１０μｍ以下の細線で形成したので、配線が外部から視認されにくく、視認性の高いタッチパネルを得ることができる。   Moreover, since the wiring widths of the detection wirings 3 and 4 and the isolated wirings 8a and 8b are formed by thin lines of 10 μm or less, the wirings are hardly visible from the outside, and a touch panel with high visibility can be obtained.

本実施の形態によれば、検出用列配線３と検出行配線４とによって囲まれた複数の領域にそれぞれ孤立配線８ａ、８ｂを配置したことにより、不透明な導電性材料で検出用列配線３と検出行配線４を形成してもタッチパネルの光の透過率を均一化することができるので、応答速度が速く、表示ムラやモアレを低減でき、大型化が容易で視認性の高いタッチパネルを得ることができる。   According to the present embodiment, since the isolated wirings 8a and 8b are arranged in a plurality of regions surrounded by the detection column wiring 3 and the detection row wiring 4, respectively, the detection column wiring 3 is made of an opaque conductive material. Even if the detection row wiring 4 is formed, the light transmittance of the touch panel can be made uniform, so that the response speed is fast, display unevenness and moire can be reduced, and a touch panel with high visibility and high visibility can be obtained. be able to.

実施の形態２．
図５はこの発明の実施の形態２におけるタッチパネルの検出用配線パターンの一部を拡大して示す平面図である。また、図６はこの発明の実施の形態２におけるタッチパネルの光の透過率分布を比較例とともに示す図である。 Embodiment 2. FIG.
FIG. 5 is an enlarged plan view showing a part of the detection wiring pattern of the touch panel according to Embodiment 2 of the present invention. FIG. 6 is a diagram showing the light transmittance distribution of the touch panel according to Embodiment 2 of the present invention together with a comparative example.

図５において、タッチパネルの検出用列配線３１（第１配線）は、列方向（図５中のＹ方向）に線対称な一対のジグザグ配線３１ａ、３１ｂを行方向（図５中のＸ方向）に所定の間隔をおいて配列されており、隣接する配線同士が列方向に対して線対称になるように配置されている。同様に、検出用行配線４１（第２配線）は、行方向に線対称な一対のジグザグ配線４１ａ、４１ｂを列方向に所定の間隔をおいて配列されており、隣接する配線同士が行方向に対して線対称になるように配置されている。そして、検出用列配線３１、検出用行配線４１ともに、ジグザグを形成する各辺は行方向に対して４５度の角度をなしており、検出用列配線３１と検出用行配線４１とはジグザグパターンを形成する各辺の中点で直交するように配置されている。   In FIG. 5, the detection column wiring 31 (first wiring) of the touch panel has a pair of zigzag wirings 31a and 31b symmetrical in the column direction (Y direction in FIG. 5) in the row direction (X direction in FIG. 5). Are arranged so as to be symmetrical with respect to the column direction. Similarly, in the detection row wiring 41 (second wiring), a pair of zigzag wirings 41a and 41b which are line symmetrical in the row direction are arranged at a predetermined interval in the column direction, and adjacent wirings are arranged in the row direction. Are arranged so as to be line-symmetric with respect to each other. In each of the detection column wiring 31 and the detection row wiring 41, the sides forming the zigzag form an angle of 45 degrees with respect to the row direction. The detection column wiring 31 and the detection row wiring 41 are zigzag-shaped. They are arranged so as to be orthogonal at the midpoint of each side forming the pattern.

また、実施の形態１と同様に、所定本数の検出用列配線３１、検出用行配線４１はそれぞれ複数本毎に両端が接続用配線（図示せず）によって電気的に短絡され、複数の列方向束配線および行方向束配線をそれぞれ構成している。   Similarly to the first embodiment, both ends of a predetermined number of detection column wirings 31 and detection row wirings 41 are electrically short-circuited by connection wirings (not shown), and a plurality of columns are connected. The direction bundle wiring and the row direction bundle wiring are respectively configured.

そして、検出用列配線３１と検出用行配線４１とによって囲まれた複数の領域にダミー配線である孤立配線８１ａ、８１ｂ（第３配線）が配置されている。孤立配線８１ａは検出用列配線３１と同じ層に、孤立配線８１ｂは検出用行配線４１と同じ層にそれぞれ形成されている。また、孤立配線８１ａ、８１ｂは、検出用列配線３１または検出用行配線４１と同様に、行方向または列方向に対して４５度の角度をなすように配向されている。   In addition, isolated wirings 81a and 81b (third wirings) that are dummy wirings are arranged in a plurality of regions surrounded by the detection column wirings 31 and the detection row wirings 41. The isolated wiring 81a is formed in the same layer as the detection column wiring 31, and the isolated wiring 81b is formed in the same layer as the detection row wiring 41. The isolated wirings 81a and 81b are oriented so as to form an angle of 45 degrees with respect to the row direction or the column direction, like the detection column wiring 31 or the detection row wiring 41.

なお、本実施の形態においては、検出用列方向配線３１、検出用行方向配線４１、および孤立配線８１ａ、８１ｂはすべて同一線幅であり、その配線幅は１０μｍ以下であることが望ましい。
また、一対の検出用列配線３１および検出用行配線４１の配列ピッチは０．１〜１ｍｍの範囲であることが望ましい。 In the present embodiment, the detection column direction wiring 31, the detection row direction wiring 41, and the isolated wirings 81a and 81b all have the same line width, and the wiring width is preferably 10 μm or less.
The arrangement pitch of the pair of detection column wirings 31 and the detection row wirings 41 is preferably in the range of 0.1 to 1 mm.

これらの点を除けば、本実施の形態は実施の形態１と同様の構成を有するものである。   Except for these points, the present embodiment has the same configuration as that of the first embodiment.

図６は、上記のように構成した実施の形態２におけるタッチパネルの光の透過率分布を、孤立配線を配置しないように構成した比較例のタッチパネルの光の透過率分布と比較して示した図であり、図６（ａ）は比較例のタッチパネルを表示装置に装着した場合の透過率分布を示す図、図６（ｂ）は本実施の形態におけるタッチパネルを表示装置に装着した場合の透過率分布を示す図である。図６（ａ）に示すように、孤立配線８１ａ、８２ｂを配置しないように構成した比較例のタッチパネルにおいては繰り返しの表示ムラが見られるが、図６（ｂ）に示すように検出用列配線３１と検出用行配線４１とによって囲まれた複数の領域に孤立配線８１ａ、８１ｂをそれぞれ配置した本実施の形態におけるタッチパネルには、繰り返しの表示ムラはほとんど視認されない。   FIG. 6 is a diagram showing the light transmittance distribution of the touch panel according to the second embodiment configured as described above compared with the light transmittance distribution of the touch panel of the comparative example configured so as not to arrange the isolated wiring. FIG. 6A is a diagram showing a transmittance distribution when the touch panel of the comparative example is mounted on the display device, and FIG. 6B is a transmittance when the touch panel according to the present embodiment is mounted on the display device. It is a figure which shows distribution. As shown in FIG. 6A, in the touch panel of the comparative example configured such that the isolated wirings 81a and 82b are not arranged, repeated display unevenness is observed. However, as shown in FIG. In the touch panel according to the present embodiment in which the isolated wirings 81a and 81b are respectively arranged in a plurality of areas surrounded by the line 31 and the detection row wiring 41, repeated display unevenness is hardly visually recognized.

このように、検出用列配線３１と検出用行配線４１とによって囲まれた複数の領域に孤立配線８１ａ、８１ｂを配置することによって、不透明な導電性材料で検出用列配線３１および検出用行配線４１を形成しても、タッチパネル全体の光の透過率が均一化されるため、応答速度を低下することなくタッチパネルの表示ムラが大幅に低減でき、視認性の高いタッチパネルを得ることができる。しかも、孤立配線８１ａ、８１ｂは検出用配線３１，４１と電気的に絶縁されているので、検出用配線３１、４１の配列間隔を大きくして検出用配線３１、４１の密度を疎にすることによって、配線の寄生容量を小さくでき、配線遅延を抑制できる。   In this way, by arranging the isolated wirings 81a and 81b in a plurality of regions surrounded by the detection column wiring 31 and the detection row wiring 41, the detection column wiring 31 and the detection row are made of an opaque conductive material. Even if the wiring 41 is formed, the light transmittance of the entire touch panel is made uniform, so that display unevenness of the touch panel can be greatly reduced without lowering the response speed, and a highly visible touch panel can be obtained. In addition, since the isolated wirings 81a and 81b are electrically insulated from the detection wirings 31 and 41, the arrangement interval of the detection wirings 31 and 41 is increased to make the density of the detection wirings 31 and 41 sparse. Thus, the parasitic capacitance of the wiring can be reduced, and the wiring delay can be suppressed.

また、検出用配線３１、４１は、それぞれジグザグ状に形成するとともに互いに隣接する配線同士を線対称にしたので、光の透過率をより均一化でき、さらに、このジグザグパターンを形成する各辺の中点で検出用列配線３１と検出用行配線４１とが互いに直交するように配置したので、光の透過率を一層バランス良く均一化することができて、表示ムラの少ない視認性の高いタッチパネルを得ることができる。   Further, since the detection wirings 31 and 41 are formed in a zigzag shape and the wirings adjacent to each other are made symmetrical with respect to each other, the light transmittance can be made more uniform, and furthermore, each side forming this zigzag pattern can be obtained. Since the detection column wirings 31 and the detection row wirings 41 are arranged so as to be orthogonal to each other at the midpoint, the light transmittance can be made uniform with a better balance, and the touch panel with less display unevenness and high visibility. Can be obtained.

また、検出用配線３１、４１のジグザグを形成する各辺および孤立配線８１ａ、８１の配向方向を行方向に対して４５度の角度を有するようにしたので、列方向および行方向に画素が配列される表示装置の画素ピッチと配線ピッチとの干渉によるモアレの発生をより低減することができる。   Further, since the sides forming the zigzag of the detection wirings 31 and 41 and the orientation direction of the isolated wirings 81a and 81 are set to have an angle of 45 degrees with respect to the row direction, pixels are arranged in the column direction and the row direction. Generation of moire due to interference between the pixel pitch of the display device and the wiring pitch can be further reduced.

本実施の形態によれば、ジグザグ状の検出用列配線３１とジグザグ状の検出行配線４１とによって囲まれた複数の領域に孤立配線８１ａ、８１ｂを配置したことにより、不透明な導電性材料で検出用列配線３と検出行配線４を形成してもタッチパネルの光の透過率を均一化することができるので、応答速度が速く、表示ムラやモアレを低減でき、大型化が容易で視認性の高いタッチパネルを得ることができる。   According to the present embodiment, the isolated wirings 81a and 81b are arranged in a plurality of regions surrounded by the zigzag-shaped detection column wiring 31 and the zigzag-shaped detection row wiring 41, so that an opaque conductive material is used. Even if the detection column wiring 3 and the detection row wiring 4 are formed, the light transmittance of the touch panel can be made uniform, so that the response speed is fast, display unevenness and moire can be reduced, and the size can be easily increased and the visibility is improved. A high touch panel can be obtained.

実施の形態３．
図７はこの発明の実施の形態３におけるタッチパネルの検出用配線パターンの一部を拡大して示す平面図である。 Embodiment 3 FIG.
FIG. 7 is an enlarged plan view showing a part of the detection wiring pattern of the touch panel according to Embodiment 3 of the present invention.

図７において、タッチパネルの検出用列配線３１（第１配線）と検出用行配線４１（第２配線）とによって囲まれた領域には第３配線である分岐配線８２ａ、８２ｂが配置されている。ここで、分岐配線８２ａは検出用列配線３１と同じ層に形成されており、この分岐配線８２ａの両端は検出用列配線３１と電気的に接続されている。そして、この検出用列配線３１によって一束の列方向束配線内で隣接する検出用列配線３１同士が電気的に接続されている。   In FIG. 7, branch wirings 82a and 82b as third wirings are arranged in a region surrounded by the detection column wiring 31 (first wiring) and the detection row wiring 41 (second wiring) of the touch panel. . Here, the branch wiring 82 a is formed in the same layer as the detection column wiring 31, and both ends of the branch wiring 82 a are electrically connected to the detection column wiring 31. The detection column wirings 31 adjacent to each other in the bundle of column-direction bundle wirings are electrically connected to each other.

同様に、分岐配線８２ｂは検出用列配線４１と同じ層に形成されており、この分岐配線８２ｂの両端は検出用行配線４１と電気的に接続されている。そして、この分岐配線８２ｂによって一束の行方向束配線内で隣接する検出用行配線４１同士が電気的に接続されている。   Similarly, the branch wiring 82 b is formed in the same layer as the detection column wiring 41, and both ends of the branch wiring 82 b are electrically connected to the detection row wiring 41. The branch wirings 82b electrically connect adjacent detection row wirings 41 in a bundle of row-direction bundle wirings.

なお、隣接する検出用列配線３１または検出用行配線４１であっても、異なる束配線に含まれる検出用配線３１，４１は電気的に接続されないように構成されている。また、分岐配線８２ａ、８２ｂの主要部分は、列方向または行方向に対して４５度の角度をなすように配置されている。   In addition, even if it is the adjacent detection column wiring 31 or the detection row wiring 41, it is comprised so that the detection wiring 31 and 41 contained in a different bundle wiring may not be electrically connected. The main portions of the branch wirings 82a and 82b are arranged so as to form an angle of 45 degrees with respect to the column direction or the row direction.

なお、本実施の形態においては、検出用列方向配線３１、検出用行方向配線４１および分岐配線８２ａ、８２ｂはすべて同一線幅で形成されており、その配線幅は１０μｍ以下であることが望ましい。   In the present embodiment, the detection column direction wiring 31, the detection row direction wiring 41, and the branch wirings 82a and 82b are all formed with the same line width, and the wiring width is preferably 10 μm or less. .

これらの点を除けば、本実施の形態は実施の形態２と同様の構成を有するものである。   Except for these points, the present embodiment has the same configuration as that of the second embodiment.

このように束配線内の隣接する検出用配線３１、４１を分岐配線８２ａ、８２ｂによって電気的に接続することによって、検出用配線３１、４１を不透明な導電性材料で形成しても、実施の形態２と同様にタッチパネルの表示ムラやモアレを低減できるとともに、束配線内の検出用配線の一箇所に断線が生じても、隣接する検出用配線を通じて、静電容量の変化をコントローラ基板１３に伝達できるため、信頼性の高いタッチ位置検出が可能となる。   Even if the detection wirings 31 and 41 are formed of an opaque conductive material by electrically connecting the adjacent detection wirings 31 and 41 in the bundle wiring by the branch wirings 82a and 82b in this way, Similar to the second embodiment, display unevenness and moire of the touch panel can be reduced, and even if a break occurs in one position of the detection wiring in the bundle wiring, the change in the capacitance is transmitted to the controller board 13 through the adjacent detection wiring. Since it can be transmitted, highly reliable touch position detection is possible.

なお、ジグザグ状に形成された検出用配線同士３１ａ、３１ｂまたは４１ａ、４１ｂが接近している箇所を電気的に接続することにより、さらに信頼性の高いタッチ位置検出が可能となる。   In addition, it is possible to detect a touch position with higher reliability by electrically connecting portions where the detection wirings 31a, 31b or 41a, 41b formed in a zigzag shape are close to each other.

本実施の形態によれば、ジグザグ状の検出用行配線３１とジグザグ状の検出用列配線４１とによって囲まれた複数の領域に分岐配線８２ａ、８２ｂをそれぞれ配置し、この分岐配線８２ａ、８２ｂで束配線内において隣接する検出用配線３１、４１同士を電気的に接続したので、タッチパネルの表示ムラやモアレを低減できるとともに、信頼性の高いタッチ位置検出が可能となる。   According to the present embodiment, the branch wirings 82a and 82b are arranged in a plurality of regions surrounded by the zigzag detection row wiring 31 and the zigzag detection column wiring 41, and the branch wirings 82a and 82b. Since the adjacent detection wirings 31 and 41 in the bundle wiring are electrically connected to each other, display unevenness and moire of the touch panel can be reduced, and highly reliable touch position detection can be performed.

この発明の実施の形態１におけるタッチパネルの構成を示す平面図である。It is a top view which shows the structure of the touchscreen in Embodiment 1 of this invention. 図１におけるＡ部の拡大図である。It is an enlarged view of the A section in FIG. この発明の実施の形態１におけるタッチパネルとコントローラ基板との接続を示す平面図である。It is a top view which shows the connection of the touchscreen and controller board in Embodiment 1 of this invention. この発明の実施の形態１におけるタッチパネルの層構造を模式的に示す斜視図である。It is a perspective view which shows typically the layer structure of the touchscreen in Embodiment 1 of this invention. この発明の実施の形態２におけるタッチパネルの配線パターンを拡大して示す平面図である。It is a top view which expands and shows the wiring pattern of the touchscreen in Embodiment 2 of this invention. この発明の実施の形態２におけるタッチパネルの透過率分布を比較例とともに示す図である。It is a figure which shows the transmittance | permeability distribution of the touchscreen in Embodiment 2 of this invention with a comparative example. この発明の実施の形態３におけるタッチパネルの配線パターンを拡大して示す平面図である。It is a top view which expands and shows the wiring pattern of the touchscreen in Embodiment 3 of this invention.

符号の説明Explanation of symbols

１ タッチパネル、 ２ 透明基板、 ２ａ タッチ面、 ３，３１ａ，３１ｂ 検出用列配線（第１配線）、 ４，４１ａ，４１ｂ 検出用行配線（第２配線）、 ８ａ，８ｂ，８１ａ，８１ｂ 孤立配線（第３配線）、 １４ 層間絶縁膜（絶縁層）、 ８２ａ，８２ｂ 分岐配線（第３配線）。   DESCRIPTION OF SYMBOLS 1 Touch panel, 2 Transparent substrate, 2a Touch surface, 3, 31a, 31b Column wiring for detection (first wiring) 4, 41a, 41b Row wiring for detection (second wiring), 8a, 8b, 81a, 81b Isolated wiring (Third wiring), 14 interlayer insulating film (insulating layer), 82a, 82b branch wiring (third wiring).

Claims (10)

タッチ面を有する透明基板と、前記透明基板のタッチ面と反対面に設けられ、行方向に間隔をおいて複数配列された不透明な導電性材料からなる第１配線と、前記第１配線と絶縁層を介して設けられ、列方向に間隔をおいて複数配列された不透明な導電性材料からなる第２配線と、前記第１配線と前記第２配線とによって囲まれた複数の領域にそれぞれ配置された不透明な導電性材料からなる第３配線とを備えたタッチパネル。   A transparent substrate having a touch surface; a first wiring made of an opaque conductive material arranged on the surface opposite to the touch surface of the transparent substrate and arranged in a row direction; and insulated from the first wiring A plurality of non-transparent conductive materials arranged in the column direction and arranged in a plurality of regions surrounded by the first wiring and the second wiring. And a third wiring made of an opaque conductive material. 第３配線は、第１配線および第２配線と電気的に絶縁されていることを特徴とする請求項１に記載のタッチパネル。   The touch panel according to claim 1, wherein the third wiring is electrically insulated from the first wiring and the second wiring. 第３配線は、第１配線または第２配線と電気的に接続されていることを特徴とする請求項１に記載のタッチパネル。   The touch panel according to claim 1, wherein the third wiring is electrically connected to the first wiring or the second wiring. 第３配線は、第１配線または第２配線と平行または垂直であることを特徴とする請求項１ないし請求項３のいずれか１項に記載のタッチパネル。   The touch panel according to any one of claims 1 to 3, wherein the third wiring is parallel or perpendicular to the first wiring or the second wiring. 第１配線および第２配線は、それぞれの両端を複数本毎に短絡したことを特徴とする請求項１ないし請求項４のいずれか１項に記載のタッチパネル。   5. The touch panel according to claim 1, wherein each of the first wiring and the second wiring is short-circuited at a plurality of both ends. 第１配線および第２配線は、それぞれジグザグ状に形成されるとともに、互いに隣接する配線同士が線対称であることを特徴とする請求項１ないし請求項５のいずれか１項に記載のタッチパネル。   6. The touch panel according to claim 1, wherein the first wiring and the second wiring are each formed in a zigzag shape, and adjacent wirings are line-symmetric. ジグザグ状の第１配線および第２配線は、各辺の中点で互いに交差していることを特徴とする請求項６に記載のタッチパネル。   The touch panel as set forth in claim 6, wherein the zigzag first wiring and the second wiring intersect with each other at the midpoint of each side. ジグザグ状の第１配線および第２配線は、各辺が行方向に対して４５度をなしていることを特徴とする請求項７に記載のタッチパネル。   The touch panel according to claim 7, wherein each side of the zigzag-shaped first wiring and the second wiring forms 45 degrees with respect to the row direction. 第３配線は、行方向に対して４５度をなしていることを特徴とする請求項８に記載のタッチパネル。   The touch panel according to claim 8, wherein the third wiring forms 45 degrees with respect to the row direction. 第１ないし第３配線は、アルミニウム合金製であって、タッチ面側の表面に窒化アルミニウム合金が形成されていることを特徴とする請求項１ないし請求項９のいずれか１項に記載のタッチパネル。   The touch panel according to any one of claims 1 to 9, wherein the first to third wirings are made of an aluminum alloy, and an aluminum nitride alloy is formed on a surface on a touch surface side. .
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