JP6615975B2 - Touch panel - Google Patents

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JP6615975B2
JP6615975B2 JP2018208039A JP2018208039A JP6615975B2 JP 6615975 B2 JP6615975 B2 JP 6615975B2 JP 2018208039 A JP2018208039 A JP 2018208039A JP 2018208039 A JP2018208039 A JP 2018208039A JP 6615975 B2 JP6615975 B2 JP 6615975B2
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electrode
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JP2019046490A (en
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雅博 寺本
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Japan Display Inc
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本発明は、タッチパネルに係わり、特に、電極交差部のパターン見えを軽減したタッチパネルに関する。   The present invention relates to a touch panel, and more particularly, to a touch panel that reduces pattern appearance at electrode intersections.

タッチパネルの主な方式として、光の変化を検出する方式と、電気的な特性の変化を検出する方式とが知られている。また、電気的な特性の変化を検出する方式として、静電容量結合方式が知られている。
従来の静電容量結合方式のタッチパネルとして、下記特許文献１等に示すように、複数のＸ電極と、このＸ電極と交差する複数のＹ電極とを有するものが知られている。
前述の特許文献１等に開示されているタッチパネルでは、Ｙ電極は、交差部と、この交差部の幅よりも広い幅の電極部とが、交互に複数配置された電極パターンで形成されており、Ｘ電極は、交差部と、この交差部の幅よりも広い幅の電極部とが交互に複数配置された電極パターンで形成されている。
また、Ｙ電極の交差部と、Ｙ電極の電極部と、Ｘ電極の電極部とは、基板上に形成される。また、電極Ｘの交差部は、基板上に形成された層間絶縁層上に形成され、Ｘ電極の交差部の両端は、層間絶縁膜に形成されたコンタクトホールを介して、隣接するＸ電極の電極部にそれぞれ電気的に接続される。なお、Ｘ電極及びＹ電極は、高い透過性を有する材料、例えばＩＴＯ（Indium Tin Oxide）等の透明性導電材料で形成されている。 As a main method of a touch panel, a method for detecting a change in light and a method for detecting a change in electrical characteristics are known. As a method for detecting a change in electrical characteristics, a capacitive coupling method is known.
As a conventional capacitive coupling type touch panel, one having a plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes is known, as shown in Patent Document 1 below.
In the touch panel disclosed in the above-mentioned Patent Document 1 or the like, the Y electrode is formed by an electrode pattern in which a plurality of intersecting portions and electrode portions having a width wider than the width of the intersecting portion are alternately arranged. The X electrodes are formed in an electrode pattern in which a plurality of intersecting portions and electrode portions having a width wider than the width of the intersecting portions are alternately arranged.
Further, the intersecting portion of the Y electrodes, the electrode portion of the Y electrode, and the electrode portion of the X electrode are formed on the substrate. The intersection of the electrodes X is formed on an interlayer insulating layer formed on the substrate, and both ends of the intersection of the X electrodes are connected to the adjacent X electrodes via contact holes formed in the interlayer insulating film. Each is electrically connected to the electrode part. Note that the X electrode and the Y electrode are made of a highly transparent material, for example, a transparent conductive material such as ITO (Indium Tin Oxide).

特開２００９−２６５７４８号公報JP 2009-265748 A

しかしながら、従来の静電容量結合方式のタッチパネルでは、特定の方向から見た場合に、コンタクトホール部での反射により、コンタクトホール部がユーザに認識されてしまい、見栄えが悪化するという問題点があった。
本発明の目的は、前述の問題点を解消するために成されたものであり、本発明の目的は、表示装置において、反射により、電極交差部のパターンがユーザにより認識されるのを軽減することが可能となる技術を提供することにある。
本発明の前記ならびにその他の目的と新規な特徴は、本明細書の記述及び添付図面によって明らかにする。 However, the conventional capacitively coupled touch panel has a problem that when viewed from a specific direction, the contact hole portion is recognized by the user due to reflection at the contact hole portion, and the appearance is deteriorated. It was.
The object of the present invention is to solve the above-mentioned problems, and the object of the present invention is to reduce the recognition of the pattern of electrode intersections by the user in the display device due to reflection. It is to provide a technology that makes it possible.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

本願において開示される発明のうち、代表的なものの概要を簡単に説明すれば、下記の通りである。
（１）基板と、前記基板上で、第１の方向に延在する複数のＸ電極と、前記基板上で、前記Ｘ電極と交差して前記第２の方向に延在する複数のＹ電極と、前記基板上で、前記複数のＸ電極の各々と、前記複数のＹ電極の各々と交差する部分に形成される台座層とを有し、前記各Ｙ電極は、前記Ｘ電極と交差する交差部と、前記Ｘ電極と同層に前記Ｘ電極とは分離して形成される電極部とを有し、前記各Ｘ電極は、前記Ｙ電極と交差する交差部と、前記Ｙ電極と同層に前記Ｙ電極とは分離して形成される電極部とを有し、前記各Ｙ電極の前記交差部は、前記台座層の下に形成され、前記各Ｘ電極の前記交差部は、一部が前記台座層上に形成され、両端が隣接する前記Ｘ電極の前記電極部に電気的に接続されており、前記台座層は、前記基板と直交する方向から見て、前記Ｘ電極の前記交差部と交差する部分の外形形状が非線形形状を有し、前記台座層は、前記基板と直交する方向から見て、長軸方向が、前記Ｘ電極の前記交差部の延長方向である楕円形状で、前記隣接するＸ電極の前記電極部の前記第１の方向の両端部と重なり、前記Ｙ電極の前記電極部とは重ならないように形成され、前記台座層の前記Ｘ電極の前記第１の方向の両端部と重なる部分の断面は、前記Ｙ電極の交差部側から、前記Ｘ電極の交差部の両端に向かって、厚さが徐々に薄くなるテーパ状に形成され、前記台座層の前記第２の方向の幅は、前記Ｘ電極の前記電極部と重なる部分で、前記Ｘ電極の前記交差部の幅よりも狭くなり、前記Ｘ電極の交差部の前記第２の方向の幅は、前記Ｙ電極の交差部の前記第１の方向の幅よりも狭いことを特徴とするタッチパネル。 Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
(1) A substrate, a plurality of X electrodes extending in a first direction on the substrate, and a plurality of Y electrodes extending in the second direction across the X electrode on the substrate. And on the substrate, each of the plurality of X electrodes and a pedestal layer formed at a portion intersecting with each of the plurality of Y electrodes, and each Y electrode intersects with the X electrode. A crossing portion and an electrode portion formed separately from the X electrode in the same layer as the X electrode, wherein each X electrode is the same as the crossing portion crossing the Y electrode and the Y electrode. An electrode part formed separately from the Y electrode in the layer, the intersecting part of the Y electrodes is formed under the pedestal layer, and the intersecting part of the X electrodes is Are formed on the pedestal layer, and both ends thereof are electrically connected to the adjacent electrode portions of the X electrode, and the pedestal layer is directly connected to the substrate. The outer shape of the portion of the X electrode that intersects the intersecting portion has a non-linear shape when viewed from the direction in which the X electrode is viewed, and the long axis direction of the pedestal layer is the X electrode when viewed from the direction orthogonal to the substrate. In an elliptical shape that is an extension direction of the intersecting portion, and is formed so as to overlap with both end portions of the electrode portion of the adjacent X electrode in the first direction and not overlap with the electrode portion of the Y electrode, The cross section of the portion of the pedestal layer that overlaps both ends of the X electrode in the first direction gradually decreases in thickness from the intersection of the Y electrodes toward both ends of the intersection of the X electrodes. The width of the pedestal layer in the second direction is a portion that overlaps the electrode portion of the X electrode, and is narrower than the width of the intersecting portion of the X electrode. The width of the intersecting portion in the second direction is the first width of the intersecting portion of the Y electrode. The touch panel according to claim narrower than the width of the direction.

（２）（１）において、前記基板上に形成されるインデックスマッチング層を有し、前記Ｘ電極、前記Ｙ電極、および、前記台座層は、前記インデックスマッチング層上に形成されるタッチパネル。
（３）（１）または（２）において、前記Ｘ電極の前記電極部、および、前記Ｙ電極の前記電極部は、前記基板と直交する方向から見て、菱形形状であるタッチパネル。
（４）（１）ないし（３）のいずれかにおいて、前記Ｘ電極および前記Ｙ電極を覆うように設けられる保護膜を有するタッチパネル。
（５）基板と、前記基板上で、第１の方向に延在する複数のＸ電極と、前記基板上で、前記Ｘ電極と交差して前記第２の方向に延在する複数のＹ電極と、前記基板上で、前記複数のＸ電極の各々と、前記複数のＹ電極の各々と交差する部分に形成される台座層とを有し、前記各Ｙ電極は、前記Ｘ電極と交差する交差部と、前記Ｘ電極と同層に前記Ｘ電極とは分離して形成される電極部とを有し、前記各Ｘ電極は、前記Ｙ電極と交差する交差部と、前記Ｙ電極と同層に前記Ｙ電極とは分離して形成される電極部とを有し、前記各Ｙ電極の前記交差部は、前記台座層の下に形成され、前記各Ｘ電極の前記交差部は、一部が前記台座層上に形成され、両端が隣接する前記Ｘ電極の前記電極部に電気的に接続されており、前記台座層は、前記基板と直交する方向から見て、前記Ｘ電極の前記交差部と交差する部分の外形形状が非線形形状を有し、前記台座層は、前記基板と直交する方向から見て、長軸方向が、前記Ｘ電極の前記交差部の延長方向である楕円形状で、前記隣接するＸ電極の前記電極部の前記第１の方向の両端部と重なり、前記Ｙ電極の前記電極部とは重ならないように形成され、前記台座層の前記Ｘ電極の前記第１の方向の両端部と重なる部分の断面は、前記Ｙ電極の交差部側から、前記Ｘ電極の交差部の両端に向かって、厚さが徐々に薄くなるテーパ状に形成され、前記各Ｘ電極の前記交差部の形状は、前基板と直交する方向から見て、前記第１の方向である前記台座層の長軸方向に長辺を有し、前記第２方向に一定の幅を有する長方形であり、前記台座層の前記第２の方向の幅は、前記Ｘ電極の前記電極部と重なる部分で、前記Ｘ電極の前記交差部の幅よりも狭くなり、前記Ｘ電極の交差部の前記第２の方向の幅は、前記Ｙ電極の交差部の前記第１の方向の幅よりも狭いことを特徴とするタッチパネル。
（６）（５）において、前記基板上に形成されるインデックスマッチング層を有し、前記Ｘ電極、前記Ｙ電極、および、前記台座層は、前記インデックスマッチング層上に形成されるタッチパネル。
（７）（５）または（６）において、前記Ｘ電極の前記電極部、および、前記Ｙ電極の前記電極部は、前記基板と直交する方向から見て、菱形形状であるタッチパネル。
（８）（５）ないし（７）のいずれかにおいて、前記Ｘ電極および前記Ｙ電極を覆うように設けられる保護膜を有するタッチパネル。 (2) The touch panel according to (1), further including an index matching layer formed on the substrate, wherein the X electrode, the Y electrode, and the pedestal layer are formed on the index matching layer.
(3) In (1) or (2), the electrode part of the X electrode and the electrode part of the Y electrode have a rhombus shape when viewed from a direction orthogonal to the substrate.
(4) The touch panel having a protective film provided so as to cover the X electrode and the Y electrode in any one of (1) to (3).
(5) A substrate, a plurality of X electrodes extending in the first direction on the substrate, and a plurality of Y electrodes extending in the second direction across the X electrode on the substrate. And on the substrate, each of the plurality of X electrodes and a pedestal layer formed at a portion intersecting with each of the plurality of Y electrodes, and each Y electrode intersects with the X electrode. A crossing portion and an electrode portion formed separately from the X electrode in the same layer as the X electrode, wherein each X electrode is the same as the crossing portion crossing the Y electrode and the Y electrode. An electrode part formed separately from the Y electrode in the layer, the intersecting part of the Y electrodes is formed under the pedestal layer, and the intersecting part of the X electrodes is Are formed on the pedestal layer, and both ends thereof are electrically connected to the adjacent electrode portions of the X electrode, and the pedestal layer is directly connected to the substrate. The outer shape of the portion of the X electrode that intersects the intersecting portion has a non-linear shape when viewed from the direction in which the X electrode is viewed, and the long axis direction of the pedestal layer is the X electrode when viewed from the direction orthogonal to the substrate. In an elliptical shape that is an extension direction of the intersecting portion, and is formed so as to overlap with both end portions of the electrode portion of the adjacent X electrode in the first direction and not overlap with the electrode portion of the Y electrode, The cross section of the portion of the pedestal layer that overlaps both ends of the X electrode in the first direction gradually decreases in thickness from the intersection of the Y electrodes toward both ends of the intersection of the X electrodes. The shape of the intersection of each X electrode has a long side in the major axis direction of the pedestal layer, which is the first direction, as viewed from the direction orthogonal to the front substrate, The second direction of the pedestal layer is a rectangle having a certain width in the second direction The width of the crossing portion of the X electrode is narrower than the width of the crossing portion of the X electrode, and the width of the crossing portion of the X electrode in the second direction is the width of the Y electrode. A touch panel characterized by being narrower than the width of the intersecting portion in the first direction.
(6) The touch panel according to (5), further including an index matching layer formed on the substrate, wherein the X electrode, the Y electrode, and the pedestal layer are formed on the index matching layer.
(7) The touch panel according to (5) or (6), wherein the electrode part of the X electrode and the electrode part of the Y electrode have a rhombus shape when viewed from a direction orthogonal to the substrate.
(8) The touch panel having a protective film provided to cover the X electrode and the Y electrode in any one of (5) to (7).

本願において開示される発明のうち代表的なものによって得られる効果を簡単に説明すれば、下記の通りである。
本発明のタッチパネルによれば、反射により、電極交差部のパターンがユーザにより認識されるのを軽減することが可能となる。 The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
According to the touch panel of the present invention, it is possible to reduce the recognition of the pattern of the electrode intersection by the user by reflection.

本発明の実施例のタッチパネルを説明するための図である。It is a figure for demonstrating the touchscreen of the Example of this invention. 本発明の実施例のタッチパネルの変形例を説明するための図である。It is a figure for demonstrating the modification of the touchscreen of the Example of this invention. 本発明の実施例のタッチパネルの効果を説明するための図である。It is a figure for demonstrating the effect of the touchscreen of the Example of this invention. 従来のタッチパネル付き表示装置のタッチパネルの電極パターンを示す平面図である。It is a top view which shows the electrode pattern of the touchscreen of the conventional display apparatus with a touchscreen. 図４に示すＡ−Ａ’線に沿った断面構造を示す断面図である。FIG. 5 is a cross-sectional view showing a cross-sectional structure along the line A-A ′ shown in FIG. 4. 図４に示すＢ−Ｂ’線に沿った断面構造を示す断面図である。FIG. 5 is a cross-sectional view showing a cross-sectional structure along the line B-B ′ shown in FIG. 4. タッチパネル付き表示装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of a display apparatus with a touch panel.

以下、図面を参照して本発明の実施例を詳細に説明する。
なお、実施例を説明するための全図において、同一機能を有するものは同一符号を付け、その繰り返しの説明は省略する。また、以下の実施例は、本発明の特許請求の範囲の解釈を限定するためのものではない。
［タッチパネル付き表示装置の概略構成］
図７は、タッチパネル付き表示装置の概略構成を示すブロック図である。なお、図７では、表示パネルは、液晶表示パネル３０の場合を図示している。
図７に示すタッチパネル付き表示装置は、液晶表示パネル３０と、液晶表示パネル３０の観察者側の面上に配置された静電容量結合方式のタッチパネル２０と、液晶表示パネル３０の観察者側とは反対側の面下に配置されたバックライト４０とを備える。
液晶表示パネル３０としては、例えばＩＰＳ方式、ＴＮ方式、ＶＡ方式等の液晶表示パネルが用いられている。
タッチパネル２０は、後述するように、第１の方向に延在し、第１の方向と交差する第２の方向に所定の配列ピッチで併設される複数のＸ電極と、このＸ電極と交差して第２の方向に延在し、第１の方向に所定の配列ピッチで併設される複数のＹ電極とを有する。
なお、図７では、観察者の指５０とＸ電極との間にＣ１，Ｃ３の容量が、観察者の指５０とＹ電極との間にＣ２の容量が形成されていることを模式的に示している。図７に示すタッチパネル２０は、Ｘ電極とＹ電極との結合容量の容量差を検出して、観察者の指５０がタッチした、タッチパネル２０のタッチ面内におけるタッチ位置座標を検出する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In all the drawings for explaining the embodiments, parts having the same functions are given the same reference numerals, and repeated explanation thereof is omitted. Also, the following examples are not intended to limit the interpretation of the scope of the claims of the present invention.
[Schematic configuration of display device with touch panel]
FIG. 7 is a block diagram illustrating a schematic configuration of a display device with a touch panel. In FIG. 7, the display panel is a liquid crystal display panel 30.
The display device with a touch panel shown in FIG. 7 includes a liquid crystal display panel 30, a capacitively coupled touch panel 20 disposed on the viewer side of the liquid crystal display panel 30, and the viewer side of the liquid crystal display panel 30. Comprises a backlight 40 disposed below the opposite surface.
As the liquid crystal display panel 30, for example, a liquid crystal display panel of an IPS method, a TN method, a VA method, or the like is used.
As will be described later, the touch panel 20 extends in the first direction, and crosses the X electrodes with a plurality of X electrodes provided in a second direction that intersects the first direction at a predetermined arrangement pitch. A plurality of Y electrodes extending in the second direction and arranged side by side with a predetermined arrangement pitch in the first direction.
In FIG. 7, it is schematically shown that C1 and C3 capacitances are formed between the observer's finger 50 and the X electrode, and C2 capacitances are formed between the observer's finger 50 and the Y electrode. Show. The touch panel 20 shown in FIG. 7 detects the capacitance difference of the coupling capacitance between the X electrode and the Y electrode, and detects the touch position coordinates on the touch surface of the touch panel 20 touched by the observer's finger 50.

［従来のタッチパネル］
図４ないし図６は、従来の静電容量結合方式のタッチパネルを説明するための図であり、図４は、従来の静電容量結合方式のタッチパネルの電極パターンを示す平面図、図５は図４に示すＡ−Ａ’線に沿った断面構造を示す断面図、図６は図４に示すＢ−Ｂ’線に沿った断面構造を示す断面図である。
従来の静電容量結合方式のタッチパネルは、第１の方向（例えばＸ方向）に延在し、第１の方向と交差する第２の方向（例えばＹ方向）に所定の配列ピッチで併設される複数のＸ電極と、このＸ電極と交差して第２の方向に延在し、第１の方向に所定の配列ピッチで併設される複数のＹ電極とを有する。
複数のＹ電極の各々は、交差部２ａと、この交差部２ａの幅よりも広い幅の電極部２ｂとが、第２の方向に交互に複数配置された電極パターンで形成されている。複数のＹ電極の各々は、基板１１の観察者側の面上に配置され、その上層に形成された絶縁膜１２で覆われている。基板１１としては、例えばガラス等の透明な絶縁性基板が用いられている。
複数のＸ電極の各々は、交差部１ａと、この交差部１ａの幅よりも広い幅の電極部１ｂとが、第１の方向に交互に複数配置された電極パターンで形成されている。複数のＸ電極の各々の交差部１ａは、Ｙ電極とは異なる層に形成され、Ｙ電極の交差部２ａと平面的に交差している。複数のＸ電極の各々の電極部１ｂは、Ｙ電極の電極部２ｂと同層で、Ｙ電極とは分離して形成されている。ここで、Ｘ電極の電極部１ｂ、Ｙ電極の電極部２ｂは、基板１１と直交する方向から見て菱形の形状とされる。 [Conventional touch panel]
4 to 6 are diagrams for explaining a conventional capacitive coupling type touch panel. FIG. 4 is a plan view showing an electrode pattern of the conventional capacitive coupling type touch panel. FIG. 4 is a cross-sectional view showing a cross-sectional structure taken along line AA ′ shown in FIG. 4, and FIG. 6 is a cross-sectional view showing a cross-sectional structure taken along line BB ′ shown in FIG.
A conventional capacitively coupled touch panel extends in a first direction (for example, the X direction) and is provided at a predetermined arrangement pitch in a second direction (for example, the Y direction) that intersects the first direction. It has a plurality of X electrodes and a plurality of Y electrodes that cross the X electrodes and extend in the second direction, and are arranged side by side with a predetermined arrangement pitch in the first direction.
Each of the plurality of Y electrodes is formed of an electrode pattern in which a plurality of intersecting portions 2a and electrode portions 2b having a width wider than the width of the intersecting portions 2a are alternately arranged in the second direction. Each of the plurality of Y electrodes is disposed on the surface of the substrate 11 on the viewer side, and is covered with an insulating film 12 formed on the upper layer. As the substrate 11, for example, a transparent insulating substrate such as glass is used.
Each of the plurality of X electrodes is formed in an electrode pattern in which a plurality of intersecting portions 1a and electrode portions 1b having a width wider than the width of the intersecting portion 1a are alternately arranged in the first direction. Each intersecting portion 1a of the plurality of X electrodes is formed in a different layer from the Y electrode, and intersects the intersecting portion 2a of the Y electrodes in a plane. Each electrode portion 1b of the plurality of X electrodes is formed in the same layer as the electrode portion 2b of the Y electrode and is separated from the Y electrode. Here, the electrode portion 1b of the X electrode and the electrode portion 2b of the Y electrode have a rhombus shape when viewed from the direction orthogonal to the substrate 11.

複数のＸ電極の各々の電極部１ｂは、Ｙ電極と同様に絶縁膜１２で覆われている。複数のＸ電極の各々の交差部１ａは、絶縁膜１２上に配置され、その上層に形成された保護膜１３で覆われている。
Ｘ電極の交差部１ａは、Ｙ電極の交差部２ａと平面的に交差し、この交差部２ａを挟んで隣り合う２つの電極部１ｂに、Ｘ電極の交差部１ａとＹ電極との間の層間絶縁膜である絶縁膜１２に形成されたコンタクトホール１２ａを介してそれぞれ電気的にかつ機械的に接続されている。
平面的に見たとき、Ｙ電極の電極部２ｂは、隣り合う２つのＸ電極の交差部１ａの間に配置されており、Ｘ電極の電極部１ｂは、隣り合う２つのＹ電極の交差部２ａの間に配置されている。
なお、Ｘ電極及びＹ電極は、高い透過性を有する材料、例えばＩＴＯ（Indium Tin Oxide）等の透明性導電材料で形成されている。
しかしながら、従来の静電容量結合方式のタッチパネルでは、タッチパネルを特定の方向から見た場合に、コンタクトホール部での反射により、コンタクトホール部がユーザに認識されてしまい、見栄えが悪化するという問題点があった。 Each electrode portion 1b of the plurality of X electrodes is covered with an insulating film 12 similarly to the Y electrode. Each intersecting portion 1a of the plurality of X electrodes is disposed on the insulating film 12, and is covered with a protective film 13 formed thereon.
The crossing portion 1a of the X electrode crosses the crossing portion 2a of the Y electrode in a plane, and the two electrode portions 1b adjacent to each other with the crossing portion 2a interposed between the crossing portion 1a of the X electrode and the Y electrode. They are electrically and mechanically connected through contact holes 12a formed in the insulating film 12 which is an interlayer insulating film.
When viewed in a plan view, the electrode portion 2b of the Y electrode is disposed between the intersection portions 1a of the two adjacent X electrodes, and the electrode portion 1b of the X electrode is the intersection portion of the two adjacent Y electrodes. 2a.
Note that the X electrode and the Y electrode are made of a highly transparent material, for example, a transparent conductive material such as ITO (Indium Tin Oxide).
However, in the conventional capacitive coupling type touch panel, when the touch panel is viewed from a specific direction, the contact hole portion is recognized by the user due to reflection at the contact hole portion, and the appearance deteriorates. was there.

［実施例］
図１は、本発明の実施例のタッチパネルを説明するための図であり、同図（ａ）は、電極交差部の平面図、同図（ｂ）は、同図（ａ）のＡ−Ａ’線に沿った断面構造を示す断面図である。
本実施例でも、図４に示すように、第１の方向（例えばＸ方向）に延在し、第１の方向と交差する第２の方向（例えばＹ方向）に所定の配列ピッチで併設される複数のＸ電極と、このＸ電極と交差して第２の方向に延在し、第１の方向に所定の配列ピッチで併設される複数のＹ電極とを有する。
複数のＹ電極の各々は、交差部２ａと、この交差部２ａの幅よりも広い幅の電極部２ｂとが、第２の方向に交互に複数配置された電極パターンで形成されている。複数のＹ電極の各々は、基板１１の観察者側の面上に配置され、その上層に形成された保護膜１３で覆われている。基板１１としては、例えばガラス等の透明な絶縁性基板が用いられている。
複数のＸ電極の各々は、交差部１ａと、この交差部１ａの幅よりも広い幅の電極部１ｂとが、第１の方向に交互に複数配置された電極パターンで形成されている。複数のＸ電極の各々の交差部１ａは、台座層１５を跨ぐように形成され、Ｙ電極の交差部２ａと平面的に交差している。複数のＸ電極の各々の電極部１ｂは、Ｙ電極の電極部２ｂと同層で、Ｙ電極とは分離して形成されている。
本実施例でも、複数のＸ電極の各々は、その上層に形成された保護膜１３で覆われている。また、Ｘ電極の電極部１ｂ、Ｙ電極の電極部２ｂは、基板１１と直交する方向から見て菱形の形状とされる。 [Example]
1A and 1B are diagrams for explaining a touch panel according to an embodiment of the present invention. FIG. 1A is a plan view of an electrode crossing portion, and FIG. 1B is an AA view of FIG. It is sectional drawing which shows the cross-section along a line.
Also in this embodiment, as shown in FIG. 4, it extends in the first direction (for example, the X direction) and is provided at a predetermined arrangement pitch in the second direction (for example, the Y direction) intersecting the first direction. A plurality of X electrodes, and a plurality of Y electrodes that cross the X electrodes and extend in the second direction, and are arranged in the first direction at a predetermined arrangement pitch.
Each of the plurality of Y electrodes is formed of an electrode pattern in which a plurality of intersecting portions 2a and electrode portions 2b having a width wider than the width of the intersecting portions 2a are alternately arranged in the second direction. Each of the plurality of Y electrodes is disposed on the surface of the substrate 11 on the viewer side and is covered with a protective film 13 formed on the upper layer. As the substrate 11, for example, a transparent insulating substrate such as glass is used.
Each of the plurality of X electrodes is formed in an electrode pattern in which a plurality of intersecting portions 1a and electrode portions 1b having a width wider than the width of the intersecting portion 1a are alternately arranged in the first direction. Each intersecting portion 1a of the plurality of X electrodes is formed so as to straddle the pedestal layer 15, and intersects the intersecting portion 2a of the Y electrodes in a plane. Each electrode portion 1b of the plurality of X electrodes is formed in the same layer as the electrode portion 2b of the Y electrode and is separated from the Y electrode.
Also in this embodiment, each of the plurality of X electrodes is covered with the protective film 13 formed on the upper layer. In addition, the electrode portion 1b of the X electrode and the electrode portion 2b of the Y electrode have a rhombus shape when viewed from the direction orthogonal to the substrate 11.

本実施例では、Ｘ電極の交差部１ａと、Ｙ電極の交差部２ａとが交差する部分に台座層１５が設けられる。この台座層１５は、平面的に見た場合に、楕円形状の外形形状を有する。
前述したように、Ｘ電極の交差部１ａは、台座層１５を跨ぐように形成されることにより、Ｙ電極の交差部２ａと平面的に交差し、この交差部２ａを挟んで隣り合う２つのＸ電極の電極部１ｂに、それぞれ電気的にかつ機械的に接続されている。
平面的に見たとき、Ｙ電極の電極部２ｂは、隣り合う２つのＸ電極の交差部１ａの間に配置されており、Ｘ電極の電極部１ｂは、隣り合う２つのＹ電極の交差部２ａの間に配置されている。なお、Ｘ電極及びＹ電極は、高い透過性を有する材料、例えばＩＴＯ（Ｉndium Ｔin Ｏxide）等の透明性導電材料で形成されている。
このように、本実施例では、従来のタッチパネルにおける、絶縁膜１２に形成されるコンタクトホール１２ａをなくすために、Ｘ電極の交差部１ａと、Ｙ電極の交差部２ａとが交差する部分に台座層１５を設けたことを特徴とする。
ここで、台座層１５は、側面１５ｂが、基板１１と接触する面と反対側の平坦部１５ａに向かって厚さが徐々に厚くなるテーパ状に形成されている。 In the present embodiment, the pedestal layer 15 is provided at a portion where the intersecting portion 1a of the X electrode and the intersecting portion 2a of the Y electrode intersect. The pedestal layer 15 has an elliptical outer shape when viewed in plan.
As described above, the crossing portion 1a of the X electrode is formed so as to straddle the pedestal layer 15, thereby crossing the crossing portion 2a of the Y electrode in a plane, and two adjacent ones sandwiching the crossing portion 2a. The electrodes are electrically and mechanically connected to the electrode portion 1b of the X electrode.
When viewed in a plan view, the electrode portion 2b of the Y electrode is disposed between the intersection portions 1a of the two adjacent X electrodes, and the electrode portion 1b of the X electrode is the intersection portion of the two adjacent Y electrodes. 2a. The X electrode and the Y electrode are made of a highly conductive material, for example, a transparent conductive material such as ITO (Indium Tin Oxide).
Thus, in this embodiment, in order to eliminate the contact hole 12a formed in the insulating film 12 in the conventional touch panel, the pedestal is located at the intersection of the intersection 1a of the X electrode and the intersection 2a of the Y electrode. The layer 15 is provided.
Here, the pedestal layer 15 is formed in a tapered shape in which the side surface 15b gradually increases in thickness toward the flat portion 15a opposite to the surface in contact with the substrate 11.

本実施例では、Ｘ電極の交差部１ａと、Ｙ電極の交差部２ａとが交差する部分に台座層１５を設け、従来のタッチパネルにおける、絶縁膜１２に形成されるコンタクトホール１２ａをなくすようにしたので、特定の方向から見た場合に、コンタクトホール部での反射により、コンタクトホール部がユーザに認識されてしまい、見栄えが悪化するという問題点を解決することが可能である。
しかしながら、台座層１５上を覆うように形成されるＸ電極の交差部１ａのテーパ形状の側面１５ｂで、光学干渉含めて、周囲より反射率が高くなり顕在化し、特に反射での見栄えを悪化させることが想定される。
図１に示すように、インデックスマッチング層１６を追加することで、干渉を軽減することが可能であるが、テーパ形状の側面１５ｂでの反射による見栄えを軽減することはできない。
この反射による見栄えの悪化は、テーパ形状の側面１５ｂが原因で生じるものであり、台座層１５の外形形状が四角形の場合、図３に示すように、各側面１５ｂでの反射光が、各側面１５ｂに対して直行する方向に反射光が指向性を持つことが原因である。
そこで、本実施例では、台座層１５における、基板１１に直交する方向から見た外形形状を、長軸方向がＸ電極の交差部１ａの延長方向である楕円形としたことを特徴とする。これにより、テーパ形状の側面１５ｂが、反射方向に対して凸形状となる非線形形状となるので、側面１５ｂでの反射光を拡散することができ、側面１５ｂでの反射光による輝度と、周囲の輝度差を低減させて、電極交差部のパターン見えを軽減することが可能となる。
ここで、台座層１５の面積は、小さい程、より改善効果が見込まれ、好ましいが、Ｘ電極の抵抗値の制約から、あまり小さくすることはできない。 In this embodiment, a pedestal layer 15 is provided at a portion where the intersecting portion 1a of the X electrode and the intersecting portion 2a of the Y electrode intersect to eliminate the contact hole 12a formed in the insulating film 12 in the conventional touch panel. Therefore, when viewed from a specific direction, it is possible to solve the problem that the contact hole portion is recognized by the user due to reflection at the contact hole portion, and the appearance is deteriorated.
However, the taper-shaped side surface 15b of the crossing portion 1a of the X electrode formed so as to cover the pedestal layer 15 has a higher reflectance than the surroundings, including optical interference, and particularly deteriorates the appearance of reflection. It is assumed that
As shown in FIG. 1, it is possible to reduce interference by adding the index matching layer 16, but it is not possible to reduce the appearance due to reflection on the tapered side surface 15b.
The deterioration of appearance due to the reflection is caused by the tapered side surface 15b. When the outer shape of the pedestal layer 15 is a square, the reflected light on each side surface 15b is reflected on each side surface as shown in FIG. This is because the reflected light has directivity in the direction orthogonal to 15b.
Therefore, the present embodiment is characterized in that the outer shape of the pedestal layer 15 viewed from the direction orthogonal to the substrate 11 is an ellipse whose major axis direction is the extension direction of the intersecting portion 1a of the X electrodes. As a result, the tapered side surface 15b has a non-linear shape that is convex with respect to the reflection direction, so that the reflected light on the side surface 15b can be diffused. It is possible to reduce the luminance difference and reduce the pattern appearance at the electrode intersection.
Here, the smaller the area of the pedestal layer 15 is, the better the improvement effect is expected, and it is preferable, but it cannot be made too small due to the restriction of the resistance value of the X electrode.

なお、本実施例において、前述した理由により、基板１１に直交する方向から見た場合、台座層１５における、Ｘ電極の交差部１ａと交差する部分の形状が非線形であればよいことは明白である。
さらには、台座層１５における、基板１１に直交する方向から見た外形形状は、楕円形に限らず、５角形以上の鈍角多角形形状、あるいは、図２に示すように円形形状であってもよい。なお、図２は、本実施例の台座層１５の変形例を説明するための図であり、電極交差部の平面図である。
また、図１では、Ｙ電極の交差部２ａを台座層１５の下側、Ｘ電極の交差部１ａを台座層１５の上側に形成したが、図３に示すように、Ｘ電極の交差部１ａを台座層１５の下側、Ｙ電極の交差部２ａを台座層１５の上側に形成することも可能である。この場合の構成を図３に示す。
しかしながら、図３に示すように、製造プロセスの関係上、Ｘ電極の電極部１ｂにおける、Ｘ電極の延長方向の両端も、台座層１５の平坦部１５ａの一部と、側面１５ｂを覆うように形成する必要があるので、図１に示す構成よりも、反射領域が増加するので、好ましくない。なお、図３は、本実施例のタッチパネルの効果を説明するための図である。
また、前述の実施例では表示パネルの一例として液晶表示パネル上にタッチパネルを備えたタッチパネル付き表示装置について説明したが、本発明はこれに限定されるものではなく、有機ＥＬ表示パネルや無機ＥＬ表示パネル等の他の表示パネル上にタッチパネルを備えたタッチパネル付き表示装置に適用することができる。
以上、本発明者によってなされた発明を、前記実施例に基づき具体的に説明したが、本発明は、前記実施例に限定されるものではなく、その要旨を逸脱しない範囲において種々変更可能であることは勿論である。 In the present embodiment, for the reasons described above, it is obvious that the shape of the portion of the pedestal layer 15 that intersects the intersecting portion 1a of the X electrode is non-linear when viewed from the direction orthogonal to the substrate 11. is there.
Furthermore, the outer shape of the pedestal layer 15 viewed from the direction orthogonal to the substrate 11 is not limited to an ellipse, and may be an obtuse polygonal shape of a pentagon or more, or a circular shape as shown in FIG. Good. FIG. 2 is a view for explaining a modification of the pedestal layer 15 of the present embodiment, and is a plan view of an electrode intersection portion.
Further, in FIG. 1, the intersection 2a of the Y electrodes is formed below the pedestal layer 15, and the intersection 1a of the X electrodes is formed above the pedestal layer 15. However, as shown in FIG. 3, the intersection 1a of the X electrodes is formed. Can be formed on the lower side of the pedestal layer 15, and the intersection 2 a of the Y electrodes can be formed on the upper side of the pedestal layer 15. The configuration in this case is shown in FIG.
However, as shown in FIG. 3, due to the manufacturing process, both ends of the X electrode electrode portion 1b in the extending direction of the X electrode also cover part of the flat portion 15a of the pedestal layer 15 and the side surface 15b. Since it is necessary to form the reflective region, the reflective region increases compared to the configuration shown in FIG. 1, which is not preferable. In addition, FIG. 3 is a figure for demonstrating the effect of the touchscreen of a present Example.
Moreover, although the above-mentioned Example demonstrated the display apparatus with a touch panel provided with the touch panel on the liquid crystal display panel as an example of a display panel, this invention is not limited to this, An organic EL display panel and an inorganic EL display The present invention can be applied to a display device with a touch panel provided with a touch panel on another display panel such as a panel.
As mentioned above, the invention made by the present inventor has been specifically described based on the above embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

Ｘ 電極
１ａ，２ａ 交差部
１ｂ，２ｂ 電極部
Ｙ 電極
１１ 基板
１２ 絶縁膜
１２ａ コンタクトホール
１３ 保護膜
１５ 台座層
１５ａ 平坦部
１５ｂ 側面
１６ インデックスマッチング層
２０ タッチパネル
３０ 液晶表示パネル
４０ バックライト
５０ 指 X electrode 1a, 2a Crossing part 1b, 2b Electrode part Y electrode 11 Substrate 12 Insulating film 12a Contact hole 13 Protective film 15 Pedestal layer 15a Flat part 15b Side face 16 Index matching layer 20 Touch panel 30 Liquid crystal display panel 40 Backlight 50 Finger

Claims (8)

基板と、
前記基板上で、第１の方向に延在する複数のＸ電極と、
前記基板上で、前記Ｘ電極と交差して第２の方向に延在する複数のＹ電極と、
前記基板上で、前記複数のＸ電極の各々と、前記複数のＹ電極の各々と交差する部分に形成される台座層とを有し、
前記各Ｙ電極は、前記Ｘ電極と交差する交差部と、前記Ｘ電極と同層に前記Ｘ電極とは分離して形成される電極部とを有し、
前記各Ｘ電極は、前記Ｙ電極と交差する交差部と、前記Ｙ電極と同層に前記Ｙ電極とは分離して形成される電極部とを有し、
前記各Ｙ電極の前記交差部は、前記台座層の下に形成され、
前記各Ｘ電極の前記交差部は、前記X電極の前記電極部とは別層で形成されており、一部が前記台座層上に形成され、両端が隣接する前記Ｘ電極の前記電極部に重畳すると共に電気的に接続されており、
前記台座層は、前記基板と直交する方向から見て、前記Ｘ電極の前記交差部と交差する部分の外形形状が非線形形状を有し、
前記台座層は、前記基板と直交する方向から見て、長軸方向が、前記Ｘ電極の前記交差部の延長方向である楕円形状で、前記隣接するＸ電極の前記電極部の前記第１の方向の両端部と重なり、前記Ｙ電極の前記電極部とは重ならないように形成され、
前記台座層の前記Ｘ電極の前記第１の方向の両端部と重なる部分の断面は、前記Ｙ電極の交差部側から、前記Ｘ電極の交差部の両端に向かって、厚さが徐々に薄くなるテーパ状に形成され、
前記台座層は、前記Ｘ電極の前記電極部と重なる部分の一部に、前記台座層の前記第２の方向の幅が前記Ｘ電極の前記交差部の前記第２の方向の幅よりも狭い領域を有し、
前記Ｘ電極の交差部の前記第２の方向の幅は、前記Ｙ電極の交差部の前記第１の方向の幅よりも狭いことを特徴とするタッチパネル。 A substrate,
A plurality of X electrodes extending in a first direction on the substrate;
A plurality of Y electrodes extending in a second direction intersecting the X electrodes on the substrate;
On the substrate, each of the plurality of X electrodes, and a pedestal layer formed at a portion intersecting with each of the plurality of Y electrodes,
Each Y electrode has an intersection that intersects with the X electrode, and an electrode portion that is formed in the same layer as the X electrode and separated from the X electrode,
Each of the X electrodes has an intersecting portion that intersects with the Y electrode, and an electrode portion that is formed in the same layer as the Y electrode and separated from the Y electrode,
The intersection of each Y electrode is formed under the pedestal layer,
The intersecting portion of each X electrode is formed in a layer different from the electrode portion of the X electrode, a part is formed on the pedestal layer, and both ends are adjacent to the electrode portion of the X electrode. Superimposed and electrically connected,
The pedestal layer has a non-linear shape in an outer shape of a portion that intersects the intersecting portion of the X electrode when viewed from a direction orthogonal to the substrate.
The pedestal layer has an elliptical shape in which a major axis direction is an extension direction of the intersecting portion of the X electrodes, as viewed from a direction orthogonal to the substrate, and the first X of the electrode portions of the adjacent X electrodes. It is formed so as to overlap with both ends of the direction and not to overlap with the electrode part of the Y electrode,
The cross section of the portion of the pedestal layer that overlaps both ends of the X electrode in the first direction gradually decreases in thickness from the intersection of the Y electrodes toward both ends of the intersection of the X electrodes. Formed into a tapered shape,
The pedestal layer has a width in the second direction of the pedestal layer narrower than a width in the second direction of the intersecting portion of the X electrodes at a part of the portion of the X electrode that overlaps the electrode portion. Have an area
The width of the intersection of the X electrodes in the second direction is narrower than the width of the intersection of the Y electrodes in the first direction. 前記基板上に形成されるインデックスマッチング層を有し、
前記Ｘ電極、前記Ｙ電極、および、前記台座層は、前記インデックスマッチング層上に形成されることを特徴とする請求項１に記載のタッチパネル。 Having an index matching layer formed on the substrate;
The touch panel as set forth in claim 1, wherein the X electrode, the Y electrode, and the pedestal layer are formed on the index matching layer. 前記Ｘ電極の前記電極部、および、前記Ｙ電極の前記電極部は、前記基板と直交する方向から見て、菱形形状であることを特徴とする請求項１または請求項２に記載のタッチパネル。   The touch panel according to claim 1, wherein the electrode part of the X electrode and the electrode part of the Y electrode have a rhombus shape when viewed from a direction orthogonal to the substrate. 前記Ｘ電極および前記Ｙ電極を覆うように設けられる保護膜を有す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, further comprising a protective film provided to cover the X electrode and the Y electrode. 基板と、
前記基板上で、第１の方向に延在する複数のＸ電極と、
前記基板上で、前記Ｘ電極と交差して第２の方向に延在する複数のＹ電極と、
前記基板上で、前記複数のＸ電極の各々と、前記複数のＹ電極の各々と交差する部分に形成される台座層とを有し、
前記各Ｙ電極は、前記Ｘ電極と交差する交差部と、前記Ｘ電極と同層に前記Ｘ電極とは分離して形成される電極部とを有し、
前記各Ｘ電極は、前記Ｙ電極と交差する交差部と、前記Ｙ電極と同層に前記Ｙ電極とは分離して形成される電極部とを有し、
前記各Ｙ電極の前記交差部は、前記台座層の下に形成され、
前記各Ｘ電極の前記交差部は、前記X電極の前記電極部とは別層で形成されており、一部が前記台座層上に形成され、両端が隣接する前記Ｘ電極の前記電極部に重畳すると共に電気的に接続されており、
前記台座層は、前記基板と直交する方向から見て、前記Ｘ電極の前記交差部と交差する部分の外形形状が非線形形状を有し、
前記台座層は、前記基板と直交する方向から見て、長軸方向が、前記Ｘ電極の前記交差部の延長方向である楕円形状で、前記隣接するＸ電極の前記電極部の前記第１の方向の両端部と重なり、前記Ｙ電極の前記電極部とは重ならないように形成され、
前記台座層の前記Ｘ電極の前記第１の方向の両端部と重なる部分の断面は、前記Ｙ電極の交差部側から、前記Ｘ電極の交差部の両端に向かって、厚さが徐々に薄くなるテーパ状に形成され、
前記各Ｘ電極の前記交差部の形状は、前記基板と直交する方向から見て、前記第１の方向である前記台座層の長軸方向に長辺を有し、前記第２方向に一定の幅を有する長方形であり、
前記台座層は、前記Ｘ電極の前記電極部と重なる部分の一部に、前記台座層の前記第２の方向の幅が前記Ｘ電極の前記交差部の前記第２の方向の幅よりも狭い領域を有し、
前記Ｘ電極の交差部の前記第２の方向の幅は、前記Ｙ電極の交差部の前記第１の方向の幅よりも狭いことを特徴とするタッチパネル。 A substrate,
A plurality of X electrodes extending in a first direction on the substrate;
A plurality of Y electrodes extending in a second direction intersecting the X electrodes on the substrate;
On the substrate, each of the plurality of X electrodes, and a pedestal layer formed at a portion intersecting with each of the plurality of Y electrodes,
Each Y electrode has an intersection that intersects with the X electrode, and an electrode portion that is formed in the same layer as the X electrode and separated from the X electrode,
Each of the X electrodes has an intersecting portion that intersects with the Y electrode, and an electrode portion that is formed in the same layer as the Y electrode and separated from the Y electrode,
The intersection of each Y electrode is formed under the pedestal layer,
The intersecting portion of each X electrode is formed in a layer different from the electrode portion of the X electrode, a part is formed on the pedestal layer, and both ends are adjacent to the electrode portion of the X electrode. Superimposed and electrically connected,
The pedestal layer has a non-linear shape in an outer shape of a portion that intersects the intersecting portion of the X electrode when viewed from a direction orthogonal to the substrate.
The pedestal layer has an elliptical shape in which a major axis direction is an extension direction of the intersecting portion of the X electrodes, as viewed from a direction orthogonal to the substrate, and the first X of the electrode portions of the adjacent X electrodes. It is formed so as to overlap with both ends of the direction and not to overlap with the electrode part of the Y electrode,
The cross section of the portion of the pedestal layer that overlaps both ends of the X electrode in the first direction gradually decreases in thickness from the intersection of the Y electrodes toward both ends of the intersection of the X electrodes. Formed into a tapered shape,
The shape of the intersecting portion of each X electrode has a long side in the major axis direction of the pedestal layer, which is the first direction, as viewed from the direction orthogonal to the substrate, and is constant in the second direction. A rectangle having a width;
The pedestal layer has a width in the second direction of the pedestal layer narrower than a width in the second direction of the intersecting portion of the X electrodes at a part of the portion of the X electrode that overlaps the electrode portion. Have an area
The width of the intersection of the X electrodes in the second direction is narrower than the width of the intersection of the Y electrodes in the first direction. 前記基板上に形成されるインデックスマッチング層を有し、
前記Ｘ電極、前記Ｙ電極、および、前記台座層は、前記インデックスマッチング層上に形成されることを特徴とする請求項５に記載のタッチパネル。 Having an index matching layer formed on the substrate;
The touch panel as set forth in claim 5, wherein the X electrode, the Y electrode, and the pedestal layer are formed on the index matching layer. 前記Ｘ電極の前記電極部、および、前記Ｙ電極の前記電極部は、前記基板と直交する方向から見て、菱形形状であることを特徴とする請求項５または請求項６に記載のタッチパネル。   The touch panel according to claim 5 or 6, wherein the electrode portion of the X electrode and the electrode portion of the Y electrode have a rhombus shape when viewed from a direction orthogonal to the substrate. 前記Ｘ電極および前記Ｙ電極を覆うように設けられる保護膜を有することを特徴とする請求項５ないし請求項７のいずれか１項に記載のタッチパネル。   The touch panel according to claim 5, further comprising a protective film provided so as to cover the X electrode and the Y electrode.
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