JP2010061502A - Touch screen, touch panel, and display device - Google Patents

Touch screen, touch panel, and display device Download PDF

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JP2010061502A
JP2010061502A JP2008227885A JP2008227885A JP2010061502A JP 2010061502 A JP2010061502 A JP 2010061502A JP 2008227885 A JP2008227885 A JP 2008227885A JP 2008227885 A JP2008227885 A JP 2008227885A JP 2010061502 A JP2010061502 A JP 2010061502A
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detection
wiring
column
wirings
row
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JP4869309B2 (en
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Takeshi Ono
岳 大野
Naoki Nakagawa
直紀 中川
Masashi Agari
将史 上里
Isao Nojiri
勲 野尻
Hiroyuki Murai
博之 村井
Takahiro Nishioka
孝博 西岡
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2008227885A priority Critical patent/JP4869309B2/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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a large-sized touch panel of PCT system using metallic wires as wires for detection and capable of improving sensitivity in capacity detection by increasing wiring density without increasing parasitic capacity between the wires for detection. <P>SOLUTION: Each detection column wire 2 includes one set of the first metallic wire 2a having a zigzag pattern constituted by arranging first inclined parts 2aS inclined obliquely at an angle of inclination of 45° to the direction of column (y) and first parallel parts 2aP linked to the first inclined parts 2aS and being parallel with the direction of column (y) repeatedly in a zigzag manner along the direction of column (y) and the second metallic wire 2b having a configuration being line-symmetric to the first metallic wire 2a by using the direction of column (y) as an axis. Each row wire 3 for detection has similar structure. An inclined part 2aS1 in the first inclined part 2aS of the first metallic wire 2a and an inclined part 3aS1 in the second inclined part 3aS of the third metallic wire 3a cross orthogonally and three-dimensionally at middle points always. The other parts also have similar orthogonally crossing relationship. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、タッチパネルに於けるタッチスクリーンの大型化に関する。   The present invention relates to an increase in size of a touch screen in a touch panel.

指等の指示体によるタッチを検出して、その位置座標を特定するタッチパネルは、優れたユーザーインターフェース手段の一つとして注目されており、抵抗膜方式又は静電容量方式等の種々の方式によるタッチパネルが製品化されている。   A touch panel that detects a touch by an indicator such as a finger and identifies its position coordinate is attracting attention as one of excellent user interface means, and is a touch panel using various systems such as a resistive film system or a capacitive system. Has been commercialized.

それらの方式の内で、静電容量方式の一つとして、タッチセンサが内蔵されるタッチスクリーンの前面側を数ｍｍ程度の厚みのガラス板等の保護膜で覆った場合でも指示体のタッチの検出が可能なＰＣＴ（Projected Capacitive Touchscreen）方式がある。このＰＣＴ方式は、保護板を前面に配置できるので堅牢性に優れている点、手袋装着時でもタッチ検出が可能である点、及び、稼働部が無いため長寿命である点等の利点を有している。   Among these methods, as one of the capacitance methods, even when the front side of the touch screen with a built-in touch sensor is covered with a protective film such as a glass plate having a thickness of several millimeters, the touch of the indicator is not possible. There is a PCT (Projected Capacitive Touchscreen) method capable of detection. This PCT system has advantages such as the fact that the protective plate can be placed on the front surface, so it is excellent in robustness, can detect touch even when wearing gloves, and has a long life because there is no moving part. is doing.

例えば、ＰＣＴ方式による従来のタッチパネルに於けるタッチスクリーンは、静電容量を検出するための検出導体として、薄い誘電膜上に形成された第１シリーズの導体エレメントと、絶縁膜を介して第１シリーズの導体エレメントと隔てて形成された第２シリーズの導体エレメントとを備えており、各導体エレメント間に電気的接触をもたらすこと無く立体的に複数の交点を形成している（例えば特許文献１を参照。）。導体エレメントとして最適な材料は、例えば銀等の金属材料である。又、表示上、導体エレメントの可視性が問題となり、その可視性を低くする場合には、酸化インジウム等の透明導電膜が、導体エレメントとして用いられる。或いは、導体エレメントに変えて、細い導線を、タッチパネルの検出配線として、使用可能である。   For example, a touch screen in a conventional touch panel using the PCT method has a first series of conductor elements formed on a thin dielectric film as a detection conductor for detecting capacitance, and a first via an insulating film. A second series of conductor elements formed apart from the series of conductor elements, and a plurality of intersections are formed in three dimensions without causing electrical contact between the conductor elements (for example, Patent Document 1). See). The most suitable material for the conductor element is a metal material such as silver. In addition, the visibility of the conductor element is a problem on display, and when the visibility is lowered, a transparent conductive film such as indium oxide is used as the conductor element. Alternatively, instead of the conductor element, a thin conductive wire can be used as the detection wiring of the touch panel.

又、静電容量を検出する導体エレメントは、出力線及びマルチプレクサを介して、容量制御オシレータに接続される。その出力は、除算器でカウントされて、容量検出データとされる。   The conductor element for detecting the electrostatic capacitance is connected to the capacitance control oscillator via the output line and the multiplexer. The output is counted by a divider and used as capacity detection data.

特表平９−５１１０８６号公報JP 9-51186 A

この様なタッチパネルの検出配線を透明導電膜で形成する場合には、タッチパネルが装備される表示装置の表示品質を損なうことは少ないが、検出配線を成す透明導電膜の抵抗が高いために、タッチパネルの大型化が難しいと言う問題点がある。   When the detection wiring of such a touch panel is formed of a transparent conductive film, the display quality of a display device equipped with the touch panel is hardly impaired, but the resistance of the transparent conductive film forming the detection wiring is high, so the touch panel There is a problem that it is difficult to increase the size.

そこで、検出配線の抵抗を低くしてタッチパネルの大型化を実現するために、検出配線として金属膜を用いることが、考えられる。しかし、この場合に於いては、検出配線が反射光により視認され、表示品質が低下すると言う問題点がある。   Therefore, it is conceivable to use a metal film as the detection wiring in order to reduce the resistance of the detection wiring and realize an increase in the size of the touch panel. However, in this case, there is a problem that the detection wiring is visually recognized by the reflected light and the display quality is deteriorated.

そこで、検出配線の抵抗を低くし且つ検出配線が反射光により視認されない様に反射光を低減化してタッチパネルの大型化を実現するために、細い金属導線が検出配線として使用されることとなる。しかしながら、この場合に於いて、大面積を検出するために、細い金属導線より成る検出配線の配線密度を高めた構造にすると、却って、列用金属導線と行用金属導線間に生じる寄生容量が大きくなり、配線遅延が発生すると言う問題点がある。   Therefore, in order to reduce the resistance of the detection wiring and reduce the reflected light so that the detection wiring is not visually recognized by the reflected light to realize an increase in the size of the touch panel, a thin metal conductive wire is used as the detection wiring. However, in this case, in order to detect a large area, if the wiring density of the detection wiring made of thin metal conductors is increased, the parasitic capacitance generated between the column metal conductors and the row metal conductors is on the contrary. There is a problem that the wiring becomes larger and wiring delay occurs.

本発明は、これらの問題点を解決するために成されたものであり、金属導線より成る検出配線を用いてタッチパネルの大型化を図る際に、寄生容量を小さくして静電容量の検出感度を高めることが出来、しかも、検出用配線がより一層視認されにくくすることが出来る、大型なタッチパネルの実現化、及び、当該タッチパネルを備えた表示装置の提供を、その目的とする。   The present invention has been made to solve these problems. When a touch panel is enlarged using a detection wiring made of a metal conductor, the parasitic capacitance is reduced to reduce the capacitance detection sensitivity. An object of the present invention is to realize a large-sized touch panel and to provide a display device including the touch panel, in which the detection wiring can be made more difficult to be visually recognized.

本発明の主題は、透明なベース基板の裏面側に絶縁膜を介して立体的に交差する様に配設された、その各々が列方向に延在した複数の検出用列配線及びその各々が行方向に延在した複数の検出用行配線を有するタッチスクリーンであり、しかも、前記複数の検出用列配線の内で所定本数毎の検出用列配線は、各々の両端で電気的に共通に接続されて一束の列方向束配線を構成しており、各列方向束配線は、当該列方向束配線内に属する検出用列配線が所定のピッチで行方向に繰り返し配列されることで構成されており、且つ、前記複数の検出用行配線の内で所定本数毎の検出用行配線は、各々の両端で電気的に共通に接続されて一束の行方向束配線を構成しており、各行方向束配線は、当該行方向束配線内に属する検出用行配線が所定のピッチで列方向に繰り返し配列されることで構成されているタッチスクリーンであって、前記検出用列配線は、前記列方向に対して傾斜角度４５°で斜めに傾斜した第１傾斜部分と、前記列方向に平行で且つ前記第１傾斜部分に繋がった第１平行部分とが前記列方向に沿って繰り返し配設されて構成されるジグザグパターンの第１金属配線と、前記列方向を軸として前記第１金属配線に線対称な構成を有する第２金属配線との一組から成り、前記検出用行配線は、前記行方向に対して傾斜角度４５°で斜めに傾斜した第２傾斜部分と、前記行方向に平行で且つ前記第２傾斜部分に繋がった第２平行部分とが前記行方向に沿って繰り返し配設されて構成されるジグザグパターンの第３金属配線と、前記行方向を軸として前記第３金属配線に線対称な構成を有する第４金属配線との一組から成り、前記複数の検出用列配線の内の任意の１本の検出用列配線と前記複数の検出用行配線の内の任意の１本の検出用列配線とが立体的に交差して成る各エリアに於いて、前記エリア内に属する前記第１金属配線の２つの第１傾斜部分の内で一方の傾斜部分はその中点に於いて前記エリア内に属する前記第３金属配線の２つの第２傾斜部の内の一方の傾斜部分とその中点に於いて立体的に直交しており、前記エリア内に属する前記第１金属配線の２つの第１傾斜部分の内で他方の傾斜部分はその中点に於いて前記エリア内に属する前記第４金属配線の２つの第２傾斜部の内の一方の傾斜部分とその中点に於いて立体的に直交しており、前記エリア内に属する前記第２金属配線の２つの第１傾斜部分の内で一方の傾斜部分はその中点に於いて前記エリア内に属する前記第３金属配線の２つの第２傾斜部の内の他方の傾斜部分とその中点に於いて立体的に直交しており、前記エリア内に属する前記第２金属配線の２つの第１傾斜部分の内で他方の傾斜部分はその中点に於いて前記エリア内に属する前記第４金属配線の２つの第２傾斜部の内の他方の傾斜部分とその中点に於いて立体的に直交していることを特徴とする。   The subject of the present invention is a plurality of detection column wirings, each extending in the column direction, each arranged in a three-dimensional manner across an insulating film on the back side of a transparent base substrate, and The touch screen has a plurality of detection row wirings extending in the row direction, and the predetermined number of detection column wirings among the plurality of detection column wirings are electrically common at both ends. Connected to form a bundle of column-direction bundle wires, and each column-direction bundle wire is configured by repeatedly arranging detection column wires belonging to the column-direction bundle wires in a row direction at a predetermined pitch. The predetermined number of detection row wirings among the plurality of detection row wirings are electrically connected at both ends to form a bundle of row direction bundle wirings. Each row-direction bundle wiring has a predetermined number of detection row wirings belonging to the row-direction bundle wiring. The detection screen wiring includes a first inclined portion inclined obliquely at an inclination angle of 45 ° with respect to the column direction, and the column wiring for detection. A first metal wiring having a zigzag pattern configured to be repeatedly arranged along the column direction and a first parallel portion that is parallel to the direction and connected to the first inclined portion; and A second metal wiring having a configuration symmetrical to one metal wiring, and the detection row wiring includes a second inclined portion inclined at an inclination angle of 45 ° with respect to the row direction; A third metal wiring having a zigzag pattern configured by being repeatedly arranged along the row direction and a second parallel portion parallel to the row direction and connected to the second inclined portion; A structure symmetrical to the third metal wiring And any one of the plurality of detection column wirings and one of the plurality of detection row wirings for detection. In each area formed by three-dimensionally intersecting the column wiring, one inclined portion of the two first inclined portions of the first metal wiring belonging to the area is the area at the middle point. One of the two inclined portions of the third metal wiring belonging to the inside and the middle point thereof are orthogonally crossed three-dimensionally, and two of the first metal wiring belonging to the area Among the first inclined portions, the other inclined portion is a solid at one of the two inclined portions of the second inclined portion of the fourth metal wiring belonging to the area at the midpoint and at the midpoint thereof. Within the two first inclined portions of the second metal wiring belonging to the area. The inclined portion on the side is three-dimensionally orthogonal to the other inclined portion of the two second inclined portions of the third metal wiring belonging to the area at the midpoint, and at the midpoint thereof. Of the two first inclined portions of the second metal wiring belonging to the area, the other inclined portion is located at the midpoint between the two second inclined portions of the fourth metal wiring belonging to the area. It is characterized in that it is three-dimensionally orthogonal to the other slanted portion and its midpoint.

本発明の主題によれば、金属配線を用いた検出用配線のパターン形状を最適化している結果、検出用列配線と検出用行配線間の寄生容量をより小さくして検出用配線の配線密度をより高めることが出来るので、より高い容量検出感度を確保した大型のＰＣＴ方式タッチスクリーンを得ることが出来る。   According to the subject of the present invention, as a result of optimizing the pattern shape of the detection wiring using the metal wiring, the parasitic capacitance between the detection column wiring and the detection row wiring is further reduced, and the wiring density of the detection wiring is reduced. Therefore, it is possible to obtain a large PCT type touch screen that ensures higher capacity detection sensitivity.

以下、この発明の主題の様々な具体化を、添付図面を基に、その効果・利点と共に、詳述する。   Hereinafter, various embodiments of the subject of the present invention will be described in detail along with the effects and advantages thereof with reference to the accompanying drawings.

（実施の形態１）
図１は、本実施の形態に係るタッチパネルが有するタッチスクリーン１の構成を模式的に示す平面図である。又、図２は、検出用列配線２及び検出用行配線３の構成をより理解し易くするために検出用配線を拡大化して模式的に示したタッチスクリーン１の一部分の透視横断面図である。以下、図１及び図２を参照して、タッチスクリーン１の構成について記載する。尚、後述する実施の形態２及び３の場合をも含めて、以下の各図面に於いて、各図中で用いられている同一参照符号は、同一又は相当の構成要素を示す。 (Embodiment 1)
FIG. 1 is a plan view schematically showing a configuration of a touch screen 1 included in the touch panel according to the present embodiment. FIG. 2 is a perspective cross-sectional view of a part of the touch screen 1 schematically showing an enlarged detection wiring in order to make the configuration of the detection column wiring 2 and the detection row wiring 3 easier to understand. is there. Hereinafter, the configuration of the touch screen 1 will be described with reference to FIGS. 1 and 2. In addition, including the case of Embodiment 2 and 3 mentioned later, the same referential mark used in each figure in the following each figure shows the same or equivalent component.

図１に例示する様に、タッチスクリーン１は、（１）列方向（図１中のｙ方向に相当）に伸在し且つ所定の第１ピッチで行方向（図１中のｘ方向に相当）に繰り返し配列された、複数の検出用列配線２と、（２）行方向ｘに伸在し且つ所定の第２ピッチで列方向ｙに繰り返し配列された、複数の検出用行配線３とを、備えている。そして、所定本数の検出用列配線２は、その各々の上端及び下端に於いて、接続用配線４により、共通に電気的に接続されて、一束の列方向束配線６を構成している。同様に、所定本数の検出用行配線３は、それぞれ、その左端及び右端に於いて、接続用配線５により、共通に電気的に接続されて、一束の行方向束配線７を構成している。更に、所定本数の列方向束配線６が行方向ｘに平行配列されており、同様に、所定本数の行方向束配線７も列方向ｙに平行配列されている。従って、所定本数の列方向束配線６及び所定本数の行方向束配線７の立体的交差によって、タッチスクリーン１は、所定数のエリアに立体的に分割されている。この様な構成を採用するときには、検出用列配線及び検出用行配線の配線密度は大きくなるため、後述するタッチ容量の値を大きな値として確保することが出来る。   As illustrated in FIG. 1, the touch screen 1 (1) extends in the column direction (corresponding to the y direction in FIG. 1) and in the row direction (corresponding to the x direction in FIG. 1) at a predetermined first pitch. And a plurality of detection row wirings 3 extending in the row direction x and repeatedly arranged in the column direction y at a predetermined second pitch; Is provided. A predetermined number of the detection column wirings 2 are electrically connected in common by the connection wirings 4 at the upper end and the lower end of each of the detection column wirings 2 to form a bundle of column-direction bundle wirings 6. . Similarly, a predetermined number of detection row wirings 3 are electrically connected in common by connection wirings 5 at the left end and the right end to form a bundle of row direction bundle wirings 7. Yes. Further, a predetermined number of column-direction bundle wires 6 are arranged in parallel in the row direction x, and similarly, a predetermined number of row-direction bundle wires 7 are also arranged in parallel in the column direction y. Accordingly, the touch screen 1 is three-dimensionally divided into a predetermined number of areas by a three-dimensional intersection of a predetermined number of column-direction bundle wires 6 and a predetermined number of row-direction bundle wires 7. When such a configuration is adopted, since the wiring density of the detection column wiring and the detection row wiring is increased, a touch capacitance value described later can be secured as a large value.

そして、図２に例示する様に、各検出用列配線２は、（１）列方向ｙに対して傾斜角度４５°で斜めに傾斜した第１傾斜部分２ａＳと、列方向ｙに平行で且つ第１傾斜部分２ａＳに繋がった第１平行部分２ａＰとが、列方向ｙに沿ってジグザグ状に繰り返されて配設されて成るジグザグパターンの第１金属配線２ａと、（２）列方向ｙを軸として第１金属配線２ａに線対称な構成を有する第２金属配線２ｂとの一組から成る。   As illustrated in FIG. 2, each detection column wiring 2 includes (1) a first inclined portion 2aS inclined obliquely at an inclination angle of 45 ° with respect to the column direction y, parallel to the column direction y, and A first parallel portion 2aP connected to the first inclined portion 2aS and the zigzag pattern of the first metal wiring 2a formed by being repeatedly arranged in a zigzag manner along the column direction y; and (2) the column direction y. It consists of one set with the 2nd metal wiring 2b which has a line symmetrical structure with respect to the 1st metal wiring 2a as an axis | shaft.

同様に、各検出用行配線３は、（３）行方向ｘに対して傾斜角度４５°で斜めに傾斜した第２傾斜部分３ａＳと、行方向ｘに平行で且つ第２傾斜部分３ａＳに繋がった第２平行部分３ａＰとが、行方向ｘに沿ってジグザグ状に繰り返されて配設されて成るジグザグパターンの第３金属配線３ａと、（４）行方向ｘを軸として第３金属配線３ａに線対称な構成を有する第４金属配線３ｂとの一組から成る。   Similarly, each detection row wiring 3 is connected to the second inclined portion 3aS inclined obliquely at an inclination angle of 45 ° with respect to the row direction x, and the second inclined portion 3aS parallel to the row direction x. A second metal portion 3a having a zigzag pattern in which the second parallel portion 3aP is repeatedly arranged in a zigzag pattern along the row direction x, and (4) a third metal wire 3a with the row direction x as an axis. And a fourth metal wiring 3b having a symmetrical configuration.

しかも、複数の検出用列配線２の内の任意の１本の検出用列配線と、複数の検出用行配線３の内の任意の１本の検出用列配線とが立体的に交差して成る各エリアに於いて、以下の様な位置関係が成立する。   In addition, any one detection column wiring in the plurality of detection column wirings 2 and any one detection column wiring in the plurality of detection row wirings 3 intersect three-dimensionally. In each area, the following positional relationship is established.

即ち、各エリア内に属する第１金属配線２ａの２つの第１傾斜部分２ａＳの内で一方の傾斜部分２ａＳ１は、その中点（中心部）に於いて、当該エリア内に属する第３金属配線３ａの２つの第２傾斜部３ａＳの内の一方の傾斜部分３ａＳ１と、その中点（中心部）に於いて、常に立体的に直交している。更に、当該エリア内に属する第１金属配線２ａの２つの第１傾斜部分２ａＳの内で他方の傾斜部分２ａＳ２は、その中点（中心部）に於いて、当該エリア内に属する第４金属配線３ｂの２つの第２傾斜部３ｂＳの内の一方の傾斜部分３ｂＳ１と、その中点（中心部）に於いて、常に立体的に直交している。加えて、当該エリア内に属する第２金属配線２ｂの２つの第１傾斜部分２ｂＳの内で一方の傾斜部分２ｂＳ１は、その中点（中心部）に於いて、当該エリア内に属する第３金属配線３ａの２つの第２傾斜部３ａＳの内の他方の傾斜部分３ａＳ２と、その中点（中心部）に於いて常に立体的に直交している。更に、当該エリア内に属する第２金属配線２ｂの２つの第１傾斜部分２ｂＳの内で他方の傾斜部分２ｂＳ２は、その中点（中心部）に於いて、当該エリア内に属する第４金属配線３ｂの２つの第２傾斜部３ｂＳの内の他方の傾斜部分３ｂＳ２と、その中点（中心部）に於いて立体的に常に直交している。この様な傾斜部分同士の直交関係の設定により、当該エリア内の各平行部分２ａＰ，２ｂＰ，３ａＰ及び３ｂＰの行方向ｘに沿っての寸法は、最小値化される。   That is, of the two first inclined portions 2aS of the first metal wiring 2a belonging to each area, one inclined portion 2aS1 is the third metal wiring belonging to the area at the middle point (center portion). One inclined portion 3aS1 of the two second inclined portions 3aS of 3a and the middle point (center portion) thereof are always orthogonally three-dimensionally. Further, of the two first inclined portions 2aS of the first metal wiring 2a belonging to the area, the other inclined portion 2aS2 is the fourth metal wiring belonging to the area at the midpoint (center portion). One of the two inclined portions 3bS 3bS3b3 is always three-dimensionally orthogonal to one inclined portion 3bS1 and its midpoint (center portion). In addition, of the two first inclined portions 2bS of the second metal wiring 2b belonging to the area, one inclined portion 2bS1 is the third metal belonging to the area at the middle point (center portion). The other inclined portion 3aS2 of the two second inclined portions 3aS of the wiring 3a is always three-dimensionally orthogonal at its midpoint (center portion). Further, of the two first inclined portions 2bS of the second metal wiring 2b belonging to the area, the other inclined portion 2bS2 is the fourth metal wiring belonging to the area at its midpoint (center portion). The other inclined portion 3bS2 of the two second inclined portions 3bS of 3b is always three-dimensionally orthogonal at the midpoint (center portion) thereof. By setting such an orthogonal relationship between the inclined portions, the dimension along the row direction x of each parallel portion 2aP, 2bP, 3aP and 3bP in the area is minimized.

図２に示した以上の構成の採用により、検出用列配線２と検出用行配線３の配線間で発生する線間容量（寄生容量）の値を最小化することが可能となる。更に、本構成によって、検出用列配線２及び検出用行配線３が存在しない箇所を平面視したときの当該箇所の全面積を、本構成を採用しない場合よりも格段に少なくすることが出来るため、指等の指示体と検出用列配線２との間の静電容量及び指示体と検出用行配線３との間の静電容量から成るタッチ容量を各エリアで均一に検出することが可能となる。   By adopting the above configuration shown in FIG. 2, the value of the line capacitance (parasitic capacitance) generated between the detection column wiring 2 and the detection row wiring 3 can be minimized. Furthermore, with this configuration, the total area of the portion when the portion where the detection column wiring 2 and the detection row wiring 3 do not exist can be reduced in plan view can be significantly reduced as compared with the case where the configuration is not adopted. It is possible to uniformly detect the touch capacitance including the capacitance between the indicator such as a finger and the detection column wiring 2 and the capacitance between the indicator and the detection row wiring 3 in each area. It becomes.

そして、本構成のタッチスクリーン１の行方向ｘ及び列方向ｙの各々が、タッチスクリーン１に装着される表示パネル（例えばＬＣＤパネル）の画素パターンの行方向及び列方向と平行となる様に、上記表示パネルをタッチスクリーン１に装着するときには、検出用列配線２及び検出用行配線３の各ジグザグパターン２ａ，２ｂ，３ａ，３ｂが、画素パターンの行方向及び列方向の各々の配列方向に対して４５°の角度で傾斜した斜め方向に、各画素に対して配置されることとなり、各画素の一部を均一に覆うこととなる結果、表示パネルが出射した表示光がタッチスクリーン１を通り抜ける際の透過率を均一化することが出来、モワレ現象の発生を少なくすることが可能となる。   Then, each of the row direction x and the column direction y of the touch screen 1 of this configuration is parallel to the row direction and the column direction of the pixel pattern of the display panel (for example, LCD panel) attached to the touch screen 1. When the display panel is mounted on the touch screen 1, the zigzag patterns 2a, 2b, 3a, 3b of the detection column wiring 2 and the detection row wiring 3 are arranged in the row direction and the column direction of the pixel pattern, respectively. On the other hand, the pixels are arranged in an oblique direction inclined at an angle of 45 ° with respect to each pixel, so that a part of each pixel is uniformly covered. As a result, the display light emitted from the display panel is applied to the touch screen 1. The transmittance when passing through can be made uniform, and the occurrence of moire phenomenon can be reduced.

図１に示す様に、列方向束配線６及び行方向束配線７は、それぞれ、引き出し配線８，９によって、端子１０に接続されている。但し、ここでは、図示の便宜上、引き出し配線８，９はそれぞれ１本の配線として描かれているが、実際には、各束配線６，７を構成する検出用列配線２毎に及び検出用行配線３毎に、１本の引き出し配線が配設されている。   As shown in FIG. 1, the column-direction bundle wiring 6 and the row-direction bundle wiring 7 are connected to the terminal 10 by lead-out wirings 8 and 9, respectively. However, here, for convenience of illustration, the lead-out wires 8 and 9 are drawn as one wire, but in actuality, for each of the detection column wires 2 constituting the bundle wires 6 and 7 and for detection. For each row wiring 3, one lead wiring is provided.

図１に於いては、指等の指示体がタッチスクリーン１の後述する透明なベース基板の表面にタッチしたときに、検出用配線群を構成する検出用列配線２及び検出用行配線３（以下、検出用列配線２及び検出用行配線３を、「検出用配線」と総称する。）の各々と指示体との間に、タッチ容量が形成される。   In FIG. 1, when an indicator such as a finger touches the surface of a transparent base substrate (to be described later) of the touch screen 1, the detection column wiring 2 and the detection row wiring 3 ( Hereinafter, the detection column wiring 2 and the detection row wiring 3 are collectively referred to as “detection wiring”), and a touch capacitance is formed between the indicator and each of the indicators.

尚、各束配線６，７の本数、及び、各束配線６，７を構成する検出用配線の本数は、タッチパネルへの指示体のタッチ位置（タッチ座標値）の要求分解能から、適宜に選択・設定される。   The number of bundle wires 6 and 7 and the number of detection wires constituting each bundle wire 6 and 7 are appropriately selected based on the required resolution of the touch position (touch coordinate value) of the indicator on the touch panel.・ It is set.

次に、図３を参照して、タッチスクリーン１の層構成を記載する。タッチスクリーン１の上面層は、透明なガラス材料又は透明な樹脂から成る透明基板１２（以下「ベース基板１２」と記載する。）であり、ベース基板１２の裏面上には、アルミニウム等の金属配線材料から成る複数本の検出用列配線２が形成される。ここでは、図示の便宜上、各検出用列配線２は、既述したジグザグパターンの構造を有する様に、図示されてはいない。更に、ベース基板１２の裏面上には、全検出用列配線２を被覆する様に、シリコン窒化膜又はシリコン酸化膜等の透明な層間絶縁膜１３が形成され、層間絶縁膜１３の裏面上に、アルミニウム等の金属配線材料から成る複数本の検出用行配線３が形成される。ここでも、図示の便宜上、各検出用行配線３は、既述したジグザグパターンの構造を有する様に、図示されてはいない。尚、検出用列配線２と検出用行配線３との配設位置を逆に設定して、ベース基板１２の裏面上に検出用行配線３を形成し、層間絶縁膜１３の裏面上に検出用列配線２を形成しても良い。   Next, the layer configuration of the touch screen 1 will be described with reference to FIG. The upper surface layer of the touch screen 1 is a transparent substrate 12 (hereinafter referred to as “base substrate 12”) made of a transparent glass material or a transparent resin. On the back surface of the base substrate 12, a metal wiring such as aluminum is provided. A plurality of detection column wirings 2 made of a material are formed. Here, for convenience of illustration, each detection column wiring 2 is not illustrated so as to have the zigzag pattern structure described above. Further, a transparent interlayer insulating film 13 such as a silicon nitride film or a silicon oxide film is formed on the back surface of the base substrate 12 so as to cover all the detection column wirings 2. A plurality of detection row wirings 3 made of a metal wiring material such as aluminum are formed. Also here, for convenience of illustration, each detection row wiring 3 is not illustrated so as to have the zigzag pattern structure described above. The detection column wirings 2 and the detection row wirings 3 are set in reverse positions, the detection row wirings 3 are formed on the back surface of the base substrate 12, and the detection is performed on the back surface of the interlayer insulating film 13. The column wiring 2 may be formed.

図４は、本実施の形態に係るタッチパネルの全体構成を模式的に示した図である。タッチスクリーン１の各端子１０（図４には図示せず。図１を参照。）に、ＦＰＣ（Flexible Printed Circuit）１７の対応する端子が、ＡＣＦ（Anisotropic Conductive Film）等を用いることにより、実装される。このＦＰＣ１７を介して、タッチスクリーン１の検出用配線群の端部とコントローラ基板１８とが電気的に接続されることにより、図１〜図３に例示したタッチスクリーン１は、タッチパネルの主要構成要素として機能する。又、コントローラ基板１８には、（１）複数の検出用列配線２の各々及び複数の検出用行配線３の各々を順次に選択するスイッチ回路（図示せず。）と、（２）上記スイッチ回路により選択された検出用列配線２と指示体との間に形成される静電容量及び上記選択スイッチ回路により選択された検出用行配線と指示体との間に形成される静電容量から成るタッチ容量の検出結果に基づいて、指示体のタッチ位置のタッチスクリーン１上に於けるタッチ座標の算出処理を行う検出処理回路１９とが、搭載されている。そして、検出処理回路１９によって算出された指示体のタッチ位置のタッチスクリーン１上に於けるタッチ座標の値は、検出座標データとして、外部のコンピュータ（図示せず。）等に出力される。   FIG. 4 is a diagram schematically showing the overall configuration of the touch panel according to the present embodiment. A terminal corresponding to an FPC (Flexible Printed Circuit) 17 is mounted on each terminal 10 (not shown in FIG. 4; see FIG. 1) of the touch screen 1 by using an ACF (Anisotropic Conductive Film) or the like. Is done. The touch screen 1 illustrated in FIG. 1 to FIG. 3 is a main component of the touch panel by electrically connecting the end of the detection wiring group of the touch screen 1 and the controller board 18 via the FPC 17. Function as. The controller board 18 includes (1) a switch circuit (not shown) for sequentially selecting each of the plurality of detection column wirings 2 and each of the plurality of detection row wirings 3, and (2) the switch. From the capacitance formed between the detection column wiring 2 selected by the circuit and the indicator and the capacitance formed between the detection row wiring selected by the selection switch circuit and the indicator. A detection processing circuit 19 that performs a touch coordinate calculation process on the touch screen 1 at the touch position of the indicator based on the detection result of the touch capacitance is mounted. Then, the value of the touch coordinate on the touch screen 1 at the touch position of the indicator calculated by the detection processing circuit 19 is output as detection coordinate data to an external computer (not shown) or the like.

以上に記載した本実施の形態の構造を採用することによって、寄生容量を増加させずに配線密度を大きくすることが出来るため、容量検出感度を低下させること無く大型化が可能なタッチパネル、及び、それを備えた表示装置を提供することが出来る。   By adopting the structure of the present embodiment described above, it is possible to increase the wiring density without increasing the parasitic capacitance, and thus it is possible to increase the size without reducing the capacitance detection sensitivity, and A display device including the same can be provided.

（実施の形態２）
本実施の形態の特徴点は、実施の形態１に係るタッチスクリーン１の構成を採用した上で、検出用配線２，３の繰り返しピッチ（第１ピッチ及び第２ピッチ）を、１ｍｍ以下の寸法値に設定し、且つ、タッチスクリーン１に装着される表示パネルの画素パターンの配列ピッチよりも大きな値に設定する点にある。 (Embodiment 2)
The feature of the present embodiment is that the configuration of the touch screen 1 according to the first embodiment is adopted, and the repetitive pitches (first pitch and second pitch) of the detection wirings 2 and 3 are 1 mm or less. The value is set to a value larger than the arrangement pitch of the pixel patterns of the display panel mounted on the touch screen 1.

図５は、既述した実施の形態１によって構成されたタッチスクリーン１の検出用配線２，３の繰り返しピッチと、ガラス等のベース基板１２の厚みが１ｍｍ程である場合のタッチ容量との関係を、検出用配線２，３の配線幅が３μｍ、６μｍ及び１０μｍの各場合について、電磁界ソルバーを用いた計算によって算出した結果を示す図である。図５に示す様に、検出用配線２，３の繰り返しピッチが１ｍｍを上回ると、配線密度の低下に起因してタッチ容量が小さくなり、容量検出感度が不十分となる。他方、検出用配線２，３の繰り返しピッチが１ｍｍ以下であるときには、検出用配線２，３の配線幅の値に拘わらず、タッチ容量が顕著に増大しており、十分な容量検出感度が得られる。しかし、実施の形態２に係るタッチスクリーンの検出用配線の繰り返しピッチが、装着される表示パネルの画素パターンの配列ピッチよりも小さくなるときには、常に複数本の配線が画素上を覆うために、タッチスクリーンの透過率が減少してしまう。従って、本実施の形態に係るタッチスクリーン１の検出用配線２，３の繰り返しピッチは、１ｍｍ以下であり、且つ、装着される表示パネルの画素パターンの配列ピッチよりも大きな値に設定されることが、望ましい。   FIG. 5 shows the relationship between the repetitive pitch of the detection wirings 2 and 3 of the touch screen 1 constructed according to the first embodiment and the touch capacitance when the thickness of the base substrate 12 such as glass is about 1 mm. Is a diagram showing a result of calculation by calculation using an electromagnetic field solver for each of cases where the wiring widths of the detection wirings 2 and 3 are 3 μm, 6 μm, and 10 μm. As shown in FIG. 5, when the repetition pitch of the detection wirings 2 and 3 exceeds 1 mm, the touch capacitance is reduced due to the decrease in the wiring density, and the capacitance detection sensitivity is insufficient. On the other hand, when the repetition pitch of the detection wirings 2 and 3 is 1 mm or less, the touch capacitance is remarkably increased regardless of the value of the wiring width of the detection wirings 2 and 3, and sufficient capacitance detection sensitivity is obtained. It is done. However, when the repetitive pitch of the detection wiring of the touch screen according to the second embodiment is smaller than the arrangement pitch of the pixel pattern of the display panel to be mounted, the plurality of wirings always cover the pixel. The screen transmittance is reduced. Therefore, the repetitive pitch of the detection wirings 2 and 3 of the touch screen 1 according to the present embodiment is 1 mm or less and is set to a value larger than the pixel pattern arrangement pitch of the display panel to be mounted. Is desirable.

ここで、検出用配線２，３の繰り返しピッチを１ｍｍ以下の小さな値に設定すると、タッチスクリーン１を通り抜ける表示光の透過率が減少してしまうが、この点は、検出用配線２，３の配線幅を狭くすることにより改善することが出来る。この点を示す結果が図６である。即ち、図６は、実施の形態１によって構成されたタッチスクリーン１の検出用配線２，３の配線幅とタッチスクリーン１を通り抜ける表示光の透過率との関係の計算結果を示す図であり、検出用配線２，３の繰り返しピッチが０．１ｍｍ及び１ｍｍの各々である場合を表している。尚、検出用配線２，３の反射率は１００％であるものとしている。図６に明示される様に、検出用配線２，３の繰り返しピッチがより小さくなると透過率が減少するが、検出用配線２，３の配線幅をより小さくすることによって、この点を改善することが出来る。   Here, if the repetition pitch of the detection wirings 2 and 3 is set to a small value of 1 mm or less, the transmittance of the display light passing through the touch screen 1 is reduced. This can be improved by reducing the wiring width. The result showing this point is shown in FIG. That is, FIG. 6 is a diagram illustrating a calculation result of the relationship between the wiring width of the detection wirings 2 and 3 of the touch screen 1 configured according to the first embodiment and the transmittance of display light passing through the touch screen 1. The case where the repetition pitches of the detection wirings 2 and 3 are 0.1 mm and 1 mm is shown. It is assumed that the reflectance of the detection wirings 2 and 3 is 100%. As clearly shown in FIG. 6, the transmittance decreases as the repetition pitch of the detection wirings 2 and 3 becomes smaller, but this point is improved by making the wiring width of the detection wirings 2 and 3 smaller. I can do it.

図７は、実施の形態１によって構成されたタッチスクリーン１の検出用配線２，３の配線幅と視認限界ピッチとの関係を表した計算結果を示す図である。ここで、「視認限界ピッチ」とは、目視によって、タッチスクリーン１の配線領域と背景領域とを判別することが可能な、検出用配線２，３の繰り返しピッチの下限値である。視認限界ピッチの算出には、次の計算式（１）を用いた。   FIG. 7 is a diagram illustrating a calculation result representing a relationship between the wiring width of the detection wirings 2 and 3 and the visual recognition limit pitch of the touch screen 1 configured according to the first embodiment. Here, the “visual recognition limit pitch” is a lower limit value of the repetitive pitch of the detection wirings 2 and 3 that can visually distinguish the wiring area and the background area of the touch screen 1. The following calculation formula (1) was used to calculate the visual recognition limit pitch.

Figure 2010061502
Figure 2010061502

ここで、式（１）のパラメータの値に関しては、視距離をそれぞれ２０ｃｍ、５０ｃｍ、１００ｃｍ及び２００ｃｍの場合とし、更に、σ＝０．１３８、Ａ＝０．４７２、γ＝１．０６に設定した(視認者の年齢は２０歳・昼間に視認の場合。)。尚、計算に際して前提である検出用配線２，３の繰り返しピッチの値（１ｍｍ以下の値。）は、式（１）中の配線領域の反射明度Ｌ* mの中に反映されている。 Here, regarding the values of the parameters of the formula (1), the viewing distances are set to 20 cm, 50 cm, 100 cm, and 200 cm, respectively, and σ = 0.138, A = 0.472, and γ = 1.06 are set. (The viewer's age is 20 years old and is visible in the daytime.) The repetitive pitch value of the detection wires 2 and 3 (a value of 1 mm or less), which is a precondition for the calculation, is reflected in the reflection brightness L * m of the wiring region in the equation (1).

検出用配線２，３の繰り返しピッチの値を大きく設定すると、目視によって視認者はタッチスクリーン１の配線領域と背景領域とを見分け易くなるため、視認限界ピッチの値は大きくなる。他方、検出用配線２，３の繰り返しピッチの値を小さく設定すると、タッチスクリーン１の配線領域と背景領域とが細かくなることにより、目視によって配線領域と背景領域とを見分けづらくなるため、視認限界ピッチの値は小さくなる。又、検出用配線２，３の配線幅の増加に応じて、検出用配線２，３の面積増大による反射明度の上昇のために、視認限界ピッチの値は減少する。   If the repetition pitch value of the detection wirings 2 and 3 is set to be large, the viewer can easily distinguish between the wiring area and the background area of the touch screen 1 by visual observation, so that the visual recognition limit pitch value becomes large. On the other hand, if the value of the repetition pitch of the detection wirings 2 and 3 is set to be small, the wiring area and the background area of the touch screen 1 become fine, so that it is difficult to visually distinguish the wiring area and the background area. The pitch value becomes smaller. Further, as the wiring width of the detection wirings 2 and 3 increases, the value of the visual recognition limit pitch decreases due to an increase in reflected brightness due to an increase in the area of the detection wirings 2 and 3.

図７に示す様に、検出用配線２，３の配線幅をある程度まで小さくすると、視認限界ピッチの値が急激に増加することが理解される。検出用配線２，３の繰り返しピッチの値を１ｍｍ以下の値に設定する場合に於いて、検出用配線２，３の配線幅を５μｍ以下に設定するときには、視認限界ピッチは１ｍｍ以上の大きな値となって、検出用配線２，３の繰り返しピッチの値を視認限界ピッチ以下に設定することが出来るので、目視で検出用配線２，３の配線パターンを視認出来ない様にすることが出来る。   As shown in FIG. 7, it is understood that the value of the visual recognition limit pitch rapidly increases when the wiring width of the detection wirings 2 and 3 is reduced to a certain extent. When the value of the repeat pitch of the detection wirings 2 and 3 is set to a value of 1 mm or less, when the wiring width of the detection wirings 2 and 3 is set to 5 μm or less, the visual recognition limit pitch is a large value of 1 mm or more. Thus, the value of the repeat pitch of the detection wirings 2 and 3 can be set to a visual recognition limit pitch or less, so that the wiring pattern of the detection wirings 2 and 3 cannot be visually recognized.

従って、本実施の形態の構成に於いては、検出用配線２，３の繰り返しピッチの値が１ｍｍ以下の場合に於いて、検出用配線２，３の配線幅を５μｍ以下に設定することが、検出用配線２，３のパターンの視認を防止して、表示装置の表示品質を損なうことを防ぎ得る点で、望ましいと、言える。   Therefore, in the configuration of the present embodiment, when the value of the repetition pitch of the detection wirings 2 and 3 is 1 mm or less, the wiring width of the detection wirings 2 and 3 can be set to 5 μm or less. It can be said that it is desirable in that it can prevent the pattern of the detection wirings 2 and 3 from being visually recognized and impair the display quality of the display device.

（実施の形態３）
本実施の形態の特徴点は、（１）検出用列配線２及び検出用列配線３の各々を、Ａｌ系合金とその窒化層との多層構造で以って構成すると共に、（２）検出用配線２，３の繰り返しピッチの値が１ｍｍ以下の場合に於いて、検出用配線２，３の配線幅を１０μｍ以下に設定する点にある。 (Embodiment 3)
The feature of this embodiment is that (1) each of the detection column wiring 2 and the detection column wiring 3 is constituted by a multilayer structure of an Al alloy and its nitride layer, and (2) detection When the value of the repetition pitch of the wirings 2 and 3 for use is 1 mm or less, the wiring width of the detection wirings 2 and 3 is set to 10 μm or less.

図８は、実施の形態１によって構成されたタッチスクリーン１の検出用配線２，３を、Ａｌ系合金と、Ａｌ系合金の窒化層との多層構造として構成した場合に於ける、検出用配線２，３の配線幅とタッチスクリーン１の透過率との関係を与える計算結果を示す図である。図８は、検出用配線２，３の繰り返しピッチが、０．１ｍｍである場合の結果と、１ｍｍである場合の結果とを、表している。併せて、図８は、検出用配線２，３の反射率が１００％の場合の結果を破線で以って表している。図８の結果より、検出用配線２，３を、Ａｌ等の単一金属の配線（導線）のみで構成する場合よりも反射率が小さい、Ａｌ系合金とその窒化層との多層構造で構成することにより、検出用配線２，３の反射率の低下に伴い、大きな透過率が得られることが理解される。しかも、検出用配線２，３の配線幅を小さく設定することによって、更に透過率の向上を図ることが出来る。   FIG. 8 shows the detection wiring in the case where the detection wirings 2 and 3 of the touch screen 1 configured according to the first embodiment are configured as a multilayer structure of an Al-based alloy and an Al-based alloy nitride layer. It is a figure which shows the calculation result which gives the relationship between the wiring width of 2 and 3, and the transmittance | permeability of the touch screen. FIG. 8 shows a result when the repetition pitch of the detection wirings 2 and 3 is 0.1 mm and a result when the repetition pitch is 1 mm. In addition, FIG. 8 shows the result when the reflectance of the detection wirings 2 and 3 is 100% by a broken line. From the result of FIG. 8, the detection wirings 2 and 3 have a multilayer structure of an Al-based alloy and its nitride layer, which has a lower reflectance than that of a single metal wiring (conductive wire) such as Al. By doing so, it is understood that a large transmittance can be obtained as the reflectance of the detection wirings 2 and 3 decreases. In addition, the transmittance can be further improved by setting the wiring width of the detection wirings 2 and 3 small.

図９は、実施の形態３によって構成されたタッチスクリーンの検出用配線の配線幅と視認限界ピッチとの関係を表した計算結果を示す図である。ここで、式（１）のパラメータの値については、視距離がそれぞれ２０ｃｍ、５０ｃｍ及び１００ｃｍである場合に関して、σ＝０．１３８、Ａ＝０．４７２、及びγ＝１．０６に設定されている(視認者の年齢が２０歳・昼間の場合。)。図９に示す様に、検出用配線の配線幅を小さくすると、実施の形態２の場合よりも大きな値の配線幅に於いて、視認限界ピッチが急激に増加することが理解される。図９の結果に基づけば、検出用配線の繰り返しピッチを１ｍｍ以下に設定する場合に於いて、検出用配線の配線幅を１０μｍ以下に設定するときには、視認限界ピッチは１ｍｍ以上の急激に大きな値となるので、検出用配線の繰り返しピッチを視認限界ピッチ以下にすることが出来る結果、目視により検出用配線の配線パターンを視認出来ない様にすることが出来る。   FIG. 9 is a diagram illustrating a calculation result representing a relationship between the wiring width of the detection wiring of the touch screen configured according to the third embodiment and the visual recognition limit pitch. Here, the values of the parameters of the equation (1) are set to σ = 0.138, A = 0.472, and γ = 1.06 for the cases where the viewing distances are 20 cm, 50 cm, and 100 cm, respectively. (If the viewer is 20 years old or daytime.) As shown in FIG. 9, it is understood that when the wiring width of the detection wiring is reduced, the visual recognition limit pitch increases rapidly in the wiring width having a larger value than in the case of the second embodiment. Based on the results in FIG. 9, when the detection wiring repeat pitch is set to 1 mm or less and the detection wiring width is set to 10 μm or less, the visual recognition limit pitch is a suddenly large value of 1 mm or more. Therefore, as a result of the repetition pitch of the detection wiring being made less than or equal to the visual recognition limit pitch, the wiring pattern of the detection wiring can be prevented from being visually recognized.

以上の通り、本実施の形態に記載した構造を採用することによって、検出用配線の存在を認識されにくく出来るので、表示装置としての表示品質を損なうこと無く、容量検出感度を低下させずに、大型化を促進可能なタッチパネル、及び、同パネルを備えた表示装置を提供することが出来る。   As described above, by adopting the structure described in the present embodiment, it is difficult to recognize the presence of the detection wiring, so without deteriorating the display quality as a display device, without reducing the capacity detection sensitivity, A touch panel capable of promoting an increase in size and a display device including the panel can be provided.

（付記）
以上、本発明の実施の形態を詳細に開示し記述したが、以上の記述は本発明の適用可能な局面を例示したものであって、本発明はこれに限定されるものではない。即ち、記述した局面に対する様々な修正や変形例を、この発明の範囲から逸脱することの無い範囲内で考えることが可能である。 (Appendix)
While the embodiments of the present invention have been disclosed and described in detail above, the above description exemplifies aspects to which the present invention can be applied, and the present invention is not limited thereto. In other words, various modifications and variations to the described aspects can be considered without departing from the scope of the present invention.

実施の形態１に係るタッチパネルが有するタッチスクリーンの構成を模式的に示す平面図である。3 is a plan view schematically showing a configuration of a touch screen included in the touch panel according to Embodiment 1. FIG. 検出用列配線及び検出用行配線の構成を理解し易くするために検出用配線を拡大化して模式的に示したタッチスクリーンの一部分の横断面図である。FIG. 3 is a cross-sectional view of a part of a touch screen schematically showing an enlarged detection wiring in order to facilitate understanding of the configuration of detection column wiring and detection row wiring. 実施の形態１に係るタッチパネルが有するタッチスクリーンの層構成の一部分を模式的に示す斜視断面図である。4 is a perspective cross-sectional view schematically showing a part of a layer configuration of a touch screen included in the touch panel according to Embodiment 1. FIG. 実施の形態１に係るタッチパネルの全体構成を模式的に示した図である。It is the figure which showed typically the whole structure of the touchscreen which concerns on Embodiment 1. FIG. 実施の形態２に於ける検出用配線の配線幅とタッチ容量との関係を示す図である。FIG. 10 is a diagram illustrating a relationship between a wiring width of a detection wiring and a touch capacitance in the second embodiment. 実施の形態２に於ける検出用配線の配線幅と透過率との関係を示す図である。FIG. 10 is a diagram showing the relationship between the wiring width and transmittance of a detection wiring in the second embodiment. 実施の形態２に於ける検出用配線の配線幅と視認限界ピッチとの関係を示す図である。It is a figure which shows the relationship between the wiring width of the wiring for a detection in Embodiment 2, and a visual recognition limit pitch. 実施の形態３に於ける検出用配線の配線幅と透過率との関係を示す図である。FIG. 10 is a diagram showing a relationship between the wiring width and transmittance of a detection wiring in the third embodiment. 実施の形態３に於ける検出用配線の配線幅と視認限界ピッチとの関係を示す図である。FIG. 10 is a diagram illustrating a relationship between a wiring width of a detection wiring and a visual recognition limit pitch in the third embodiment.

符号の説明Explanation of symbols

１ タッチスクリーン、２ 検出用列配線、３ 検出用行配線、６ 列方向束配線、７ 行方向束配線、２ａ，２ｂ，３ａ，３ｂ ジグザグパターン。   1 Touch screen, 2 detection column wiring, 3 detection row wiring, 6 column direction bundle wiring, 7 row direction bundle wiring, 2a, 2b, 3a, 3b zigzag pattern.

Claims (5)

透明なベース基板の裏面側に絶縁膜を介して立体的に交差する様に配設された、その各々が列方向に延在した複数の検出用列配線及びその各々が行方向に延在した複数の検出用行配線を有するタッチスクリーンであり、しかも、
前記複数の検出用列配線の内で所定本数毎の検出用列配線は、各々の両端で電気的に共通に接続されて一束の列方向束配線を構成しており、各列方向束配線は、当該列方向束配線内に属する検出用列配線が所定のピッチで行方向に繰り返し配列されることで構成されており、且つ、
前記複数の検出用行配線の内で所定本数毎の検出用行配線は、各々の両端で電気的に共通に接続されて一束の行方向束配線を構成しており、各行方向束配線は、当該行方向束配線内に属する検出用行配線が所定のピッチで列方向に繰り返し配列されることで構成されているタッチスクリーンであって、
前記検出用列配線は、前記列方向に対して傾斜角度４５°で斜めに傾斜した第１傾斜部分と、前記列方向に平行で且つ前記第１傾斜部分に繋がった第１平行部分とが前記列方向に沿って繰り返し配設されて構成されるジグザグパターンの第１金属配線と、前記列方向を軸として前記第１金属配線に線対称な構成を有する第２金属配線との一組から成り、
前記検出用行配線は、前記行方向に対して傾斜角度４５°で斜めに傾斜した第２傾斜部分と、前記行方向に平行で且つ前記第２傾斜部分に繋がった第２平行部分とが前記行方向に沿って繰り返し配設されて構成されるジグザグパターンの第３金属配線と、前記行方向を軸として前記第３金属配線に線対称な構成を有する第４金属配線との一組から成り、
前記複数の検出用列配線の内の任意の１本の検出用列配線と前記複数の検出用行配線の内の任意の１本の検出用列配線とが立体的に交差して成る各エリアに於いて、
前記エリア内に属する前記第１金属配線の２つの第１傾斜部分の内で一方の傾斜部分はその中点に於いて前記エリア内に属する前記第３金属配線の２つの第２傾斜部の内の一方の傾斜部分とその中点に於いて立体的に直交しており、前記エリア内に属する前記第１金属配線の２つの第１傾斜部分の内で他方の傾斜部分はその中点に於いて前記エリア内に属する前記第４金属配線の２つの第２傾斜部の内の一方の傾斜部分とその中点に於いて立体的に直交しており、
前記エリア内に属する前記第２金属配線の２つの第１傾斜部分の内で一方の傾斜部分はその中点に於いて前記エリア内に属する前記第３金属配線の２つの第２傾斜部の内の他方の傾斜部分とその中点に於いて立体的に直交しており、前記エリア内に属する前記第２金属配線の２つの第１傾斜部分の内で他方の傾斜部分はその中点に於いて前記エリア内に属する前記第４金属配線の２つの第２傾斜部の内の他方の傾斜部分とその中点に於いて立体的に直交していることを特徴とする、
タッチスクリーン。 A plurality of detection column wirings each extending in the column direction and each extending in the row direction are arranged so as to three-dimensionally intersect with the back surface side of the transparent base substrate via an insulating film. A touch screen having a plurality of row lines for detection, and
Among the plurality of detection column wirings, the detection column wirings for each predetermined number are electrically connected at both ends to form a bundle of column direction bundle wirings. Is configured such that detection column wirings belonging to the column-direction bundle wiring are repeatedly arranged in a row direction at a predetermined pitch, and
Among the plurality of detection row wirings, the predetermined number of detection row wirings are electrically connected at both ends to constitute a bundle of row direction bundle wirings, and each row direction bundle wiring is , A touch screen configured by repeatedly arranging the row wirings for detection belonging to the bundle in the row direction in the column direction at a predetermined pitch,
The detection column wiring includes a first inclined portion inclined obliquely at an inclination angle of 45 ° with respect to the column direction, and a first parallel portion parallel to the column direction and connected to the first inclined portion. A zigzag pattern of first metal wirings that are repeatedly arranged along the column direction and a second metal wiring that has a configuration symmetrical to the first metal wiring with the column direction as an axis. ,
The detection row wiring has a second inclined portion inclined obliquely at an inclination angle of 45 ° with respect to the row direction, and a second parallel portion parallel to the row direction and connected to the second inclined portion. It consists of a set of a third metal wiring having a zigzag pattern configured to be repeatedly arranged along the row direction, and a fourth metal wiring having a configuration symmetrical to the third metal wiring with the row direction as an axis. ,
Each area formed by three-dimensionally intersecting any one detection column wiring among the plurality of detection column wirings and any one detection column wiring among the plurality of detection row wirings. In
Of the two first inclined portions of the first metal wiring belonging to the area, one inclined portion is an inner point of two second inclined portions of the third metal wiring belonging to the area. One inclined portion of the first metal wiring is three-dimensionally orthogonal to the middle point, and the other inclined portion of the two first inclined portions of the first metal wiring belonging to the area is at the middle point. And one of the two second inclined portions of the fourth metal wiring belonging to the area and three-dimensionally orthogonal at the midpoint thereof,
One of the two first inclined portions of the second metal wiring belonging to the area is one of the two second inclined portions of the third metal wiring belonging to the area at the midpoint thereof. The other inclined portion of the second metal wiring is three-dimensionally orthogonal to the other inclined portion, and the other inclined portion of the two first inclined portions of the second metal wiring belonging to the area is at the middle point. The other inclined portion of the two second inclined portions of the fourth metal wiring belonging to the area and the middle point thereof are three-dimensionally orthogonal to each other,
touch screen. 請求項１記載のタッチスクリーンであって、
前記検出用列配線の前記所定のピッチ及び前記検出用行配線の前記所定のピッチは、共に、１ｍｍ以下であり、且つ、前記タッチスクリーンに装着されるべき表示パネル内の画素パターンの対応する方向に於ける繰り返しピッチよりも大きいことを特徴とする、
タッチスクリーン。 The touch screen according to claim 1,
The predetermined pitch of the detection column wiring and the predetermined pitch of the detection row wiring are both 1 mm or less, and the direction corresponding to the pixel pattern in the display panel to be mounted on the touch screen It is characterized by being larger than the repetitive pitch in
touch screen. 請求項２記載のタッチスクリーンであって、
前記検出用列配線及び前記検出用行配線は、共に、Ａｌ系合金と前記Ａｌ系合金の窒化層との多層構造から成り、
前記検出用列配線の配線幅及び前記検出用行配線の配線幅は、共に、１０μｍ以下であることを特徴とする、
タッチスクリーン。 The touch screen according to claim 2,
The detection column wiring and the detection row wiring are both composed of a multilayer structure of an Al alloy and a nitride layer of the Al alloy,
The wiring width of the detection column wiring and the wiring width of the detection row wiring are both 10 μm or less,
touch screen. 請求項１乃至３の何れかに記載の前記タッチスクリーンと、
前記複数の検出用列配線の各々及び前記複数の検出用行配線の各々を順次に選択するスイッチ回路と、
前記スイッチ回路により選択された検出用列配線と前記タッチスクリーンの前記ベース基板の表面にタッチした指示体との間に形成される静電容量及び前記選択スイッチ回路により選択された検出用行配線と前記指示体との間に形成される静電容量から成るタッチ容量の検出結果に基づいて、前記指示体のタッチ位置の前記タッチスクリーンに於けるタッチ座標の算出処理を行う検出処理回路とを備えることを特徴とする、
タッチパネル。 The touch screen according to any one of claims 1 to 3,
A switch circuit for sequentially selecting each of the plurality of detection column wirings and each of the plurality of detection row wirings;
Capacitance formed between the detection column wiring selected by the switch circuit and the indicator touching the surface of the base substrate of the touch screen, and the detection row wiring selected by the selection switch circuit A detection processing circuit that calculates touch coordinates on the touch screen at the touch position of the indicator based on the detection result of the touch capacitance formed between the indicator and the electrostatic capacitance. It is characterized by
Touch panel. 請求項４記載の前記タッチパネルと、
前記タッチパネルの前記タッチスクリーンに装着された表示パネルとを備え、
前記タッチスクリーンの前記列方向と前記表示パネル内の画素パターンの列方向とは互いに平行であり、
前記タッチスクリーンの前記行方向と前記表示パネル内の前記画素パターンの行方向とは互いに平行であることを特徴とする、
表示装置。 The touch panel according to claim 4,
A display panel mounted on the touch screen of the touch panel,
The column direction of the touch screen and the column direction of the pixel pattern in the display panel are parallel to each other,
The row direction of the touch screen and the row direction of the pixel pattern in the display panel are parallel to each other,
Display device.
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