JP3145217B2 - Transparent touch panel - Google Patents
Transparent touch panelInfo
- Publication number
- JP3145217B2 JP3145217B2 JP34240692A JP34240692A JP3145217B2 JP 3145217 B2 JP3145217 B2 JP 3145217B2 JP 34240692 A JP34240692 A JP 34240692A JP 34240692 A JP34240692 A JP 34240692A JP 3145217 B2 JP3145217 B2 JP 3145217B2
- Authority
- JP
- Japan
- Prior art keywords
- external connection
- touch panel
- transparent
- connection electrode
- substrates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Position Input By Displaying (AREA)
- Push-Button Switches (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種表示装置の前面に
設置し、ペンや指でその表面を押圧変位させてその押圧
点座標を検出することで、文字入力や描画入力等を行う
ための透明タッチパネルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inputting characters and drawing by installing the display on the front of various display devices and detecting the coordinates of the pressed point by pressing and displacing the surface with a pen or finger. Related to a transparent touch panel.
【０００２】[0002]
【従来の技術】近年、各種表示装置においては、表示機
能のみならずヒュウマンインターフェースを向上させる
ために、表示画面上において手書き入力機能を付加させ
たパーソナルコンピュータ、電子手帳、各種端末機等が
数多く見られるようになってきた。そうした手書き入力
のインターフェースの一つとして、透明導電性フィルム
等によって構成した透明タッチパネルが用いられてい
る。2. Description of the Related Art In recent years, in various display devices, in order to improve not only the display function but also the human interface, there are many personal computers, electronic notebooks, various terminals and the like having a handwriting input function added on a display screen. It has come to be seen. As one of such handwriting input interfaces, a transparent touch panel formed of a transparent conductive film or the like is used.
【０００３】こうした透明タッチパネルは、２枚の透明
基板を間に空隙を設けつつ貼り合わせ、その際少なくと
も一方の基板は可撓性を有する絶縁性透明有機物フィル
ムを用い、向かい合った２枚の基板面上には透明導電性
膜を設け、さらに外部に電気信号を取り出すための外部
接続電極部を基板間空隙を塞ぐように基板間内側の外周
部に設けて構成されている。[0003] In such a transparent touch panel, two transparent substrates are bonded together with a gap therebetween, and at least one of the substrates uses a flexible insulating transparent organic material film. A transparent conductive film is provided thereon, and an external connection electrode portion for extracting an electric signal to the outside is provided on an inner peripheral portion between the substrates so as to close a gap between the substrates.
【０００４】ここで基板の少なくとも一方には、可撓性
を有する絶縁性透明有機物フィルムを用いる。そして他
方の基板には同様な絶縁性透明有機物フィルム、あるい
はガラス基板等を用いる。そしてこれら基板の表面上に
所望のパターンで透明導電性膜を形成する。これによ
り、所望の導電性膜を有する透明導電性フィルムあるい
は透明導電性ガラスを得ることができる。ここでこのよ
うな透明導電性膜は、ＩＴＯ（インジウム酸化錫）等を
基板上に蒸着、スパッタまたは塗工等を行うことで形成
できる。[0004] At least one of the substrates is made of a flexible insulating transparent organic film. For the other substrate, a similar insulating transparent organic material film or a glass substrate is used. Then, a transparent conductive film is formed in a desired pattern on the surfaces of these substrates. Thereby, a transparent conductive film or a transparent conductive glass having a desired conductive film can be obtained. Here, such a transparent conductive film can be formed by depositing, sputtering or coating ITO (indium tin oxide) or the like on a substrate.
【０００５】ここでアナログ式の透明タッチパネルで
は、２枚の基板上にはそれぞれ一面に透明導電性膜が形
成される。そして間に空隙層を挟みつつ、導電性膜を向
かい合わせにして２枚の基板が貼り合わせられる。その
際に基板間の外周部には、タッチパネル上の押圧箇所を
示す信号を、外部へ取り出すための外部接続電極部が設
けられる。Here, in an analog type transparent touch panel, a transparent conductive film is formed on one surface of each of two substrates. Then, the two substrates are bonded together with the conductive films facing each other while sandwiching the gap layer therebetween. At this time, an external connection electrode portion for extracting a signal indicating a pressed portion on the touch panel to the outside is provided on an outer peripheral portion between the substrates.
【０００６】この外周部に設ける外部接続電極部は、一
方の基板上の透明導電性膜に接して設けられた電極層、
その上部に設けられる絶縁層、さらにその上部に設けら
れた接着層等によって構成される。このように構成され
た外部接続電極部は、２枚の基板間内側外周部の空隙を
塞ぎつつ、所定の間隔で基板の貼り合わせを保持するよ
うに機能する。The external connection electrode portion provided on the outer peripheral portion includes an electrode layer provided in contact with the transparent conductive film on one substrate,
It is composed of an insulating layer provided thereon, an adhesive layer provided thereon, and the like. The external connection electrode portion configured in this way functions to close the gap between the inner peripheral portions between the two substrates and maintain the bonding of the substrates at predetermined intervals.
【０００７】そして例えばこれが、２軸で押圧箇所の座
標検出を行う矩形のアナログ式チッチパネルでは、４辺
の外周部の内の対向する２辺づつの組合せで信号を取り
出すように、外部接続電極部が設けられる。すなわちこ
の場合一方の基板上の導電性膜は、対向する２辺の外周
部に設けられた外部接続電極部の電極層とのみ通常接続
されている。そして他方の基板上の導電性膜は、それと
は直交する２辺の外周部に設けられた外部接続電極部の
電極層とのみ通常接続されている。[0007] For example, in a rectangular analog touch panel which detects the coordinates of a pressed portion with two axes, external connection electrodes are so arranged as to take out a signal by a combination of two opposing sides of the outer periphery of four sides. A part is provided. That is, in this case, the conductive film on one substrate is normally connected only to the electrode layer of the external connection electrode portion provided on the outer periphery of the two opposing sides. The conductive film on the other substrate is usually connected only to the electrode layer of the external connection electrode portion provided on the outer periphery of two sides orthogonal to the conductive film.
【０００８】そしてタッチパネルとしては、可撓性を有
する基板の側を押圧することで、押圧した箇所の２枚の
基板上の透明電極同志が接触する。このとき一方の導電
性膜には、それと直接接触している外部接続電極部を通
じて電圧を印加しておく。すると押圧して接触した箇所
の位置に応じて、もう一方の基板上の外部接続電極部か
らはその押圧接触箇所を表す電圧信号を取り出すことが
できる。そしてこの電圧印加と検出との役割を、２つの
導電性膜間で切り換えることで、２軸で押圧箇所の座標
検出を行うことができる。As a touch panel, by pressing the side of the flexible substrate, the transparent electrodes on the two substrates at the pressed position come into contact with each other. At this time, a voltage is applied to one conductive film through an external connection electrode portion which is in direct contact with the conductive film. Then, a voltage signal representing the pressed contact portion can be taken out from the external connection electrode portion on the other substrate according to the position of the portion pressed and contacted. By switching the roles of the voltage application and the detection between the two conductive films, the coordinates of the pressed portion can be detected biaxially.
【０００９】[0009]
【発明が解決しようとする課題】透明タッチパネルは、
機器のコンパクト化を目的に表示画面と同程度のサイズ
に作られている。そしてその際、表示画面中央のみなら
ず画面外周辺ぎりぎりまで情報表示させつつ、情報の手
書き入力をできることが好ましい。このために透明タッ
チパネルに対しては、外部接続電極部が設けられた外周
部の近傍にまでスイッチ接点の役割を果たす透明電極を
設け、そこに押圧する力が加わることになる。SUMMARY OF THE INVENTION A transparent touch panel is
It is made about the same size as the display screen for the purpose of making the equipment compact. At this time, it is preferable that the information can be input by handwriting while displaying information not only at the center of the display screen but also at the very periphery of the outside of the screen. For this reason, the transparent touch panel is provided with a transparent electrode serving as a switch contact near the outer peripheral portion where the external connection electrode portion is provided, and a pressing force is applied thereto.
【００１０】しかし従来の透明タッチパネルにおいて
は、スイッチ動作のために押圧が加えられると、ＩＴＯ
等で形成された透明導電性膜に伸びや圧縮の応力が加わ
る。そしてそれが透明導電性膜の限界応力を越えるか繰
り返されると、クラックが発生し破壊され、透明導電性
膜の抵抗値は増大して特性が劣化する。特に外部接続電
極部が設けられた外周部の近傍においては、同じ力で押
圧を加えていても基板に加わる応力は中央部よりも増大
し、透明導電性膜は破壊されやすい。However, in a conventional transparent touch panel, when a pressure is applied for a switch operation, the ITO
Elongation or compression stress is applied to the transparent conductive film formed by the above method. When the stress exceeds the limit stress of the transparent conductive film or is repeated, cracks are generated and broken, and the resistance value of the transparent conductive film is increased to deteriorate the characteristics. In particular, in the vicinity of the outer peripheral portion where the external connection electrode portion is provided, even if the same force is applied, the stress applied to the substrate increases more than in the central portion, and the transparent conductive film is easily broken.
【００１１】そしてこのような特性劣化が起こると、押
圧点での電位を検出してその押圧座標を算出するような
アナログ式のタッチパネルにおいては、実際に押圧した
座標と算出した座標との間でズレが生じることになる。
このため従来の透明タッチパネルでは、特に外周部の機
械的耐久性が低いことから、タッチパネルとして利用で
きるのはその中央部の領域に限られていた。When such a characteristic deterioration occurs, in an analog type touch panel that detects the potential at the pressed point and calculates the pressed coordinates, the analog type touch panel is located between the actually pressed coordinates and the calculated coordinates. Deviation will occur.
For this reason, in the conventional transparent touch panel, the mechanical durability of the outer peripheral portion is particularly low, so that the touch panel can be used only in the central region.
【００１２】本発明はかかる課題を解決し、外周部の機
械的耐久性を向上させ、利用できる面積を拡大させた透
明タッチパネルを得ることを目的とする。すなわち表示
画面のサイズに合わせて外形の制限を受ける透明タッチ
パネルにおいて、外周部の近傍ぎりぎりにまで有効に文
字入力や描画入力を行うことが可能な透明タッチパネル
を得ることを目的とする。An object of the present invention is to solve the above-mentioned problems, to improve the mechanical durability of the outer peripheral portion, and to obtain a transparent touch panel having an increased usable area. In other words, an object of the present invention is to provide a transparent touch panel that can effectively perform character input and drawing input in the vicinity of an outer peripheral portion of a transparent touch panel whose outer shape is restricted according to the size of a display screen.
【００１３】[0013]
【課題を解決するための手段】本発明の透明タッチパネ
ルは、２枚の透明基板を間に空隙層を設けつつ貼り合わ
せ、その際少なくとも一方の基板は可撓性を有する絶縁
性透明有機物フィルムを用い、向かい合った２枚の基板
面上には透明導電膜を設け、さらに外部に電気信号を取
り出すための外部接続電極部を基板間空隙を塞ぐように
基板間内側の外周部に設けた透明タッチパネルにおい
て、基板間空隙を塞ぐ外部電極接続部の厚みが少なくと
も最内周側の部分で９０μｍ以下であり、かつ、２枚の
透明基板間の距離が、該外部接続電極部の最外周側に対
応する部分より該外部電極接続部の最内周側に対応する
部分で小さく、かつ外部接続電極部の最内周側からの破
壊限界距離が２．５ｍｍ以下であることを特徴としてい
る。In the transparent touch panel of the present invention, two transparent substrates are attached to each other while providing a gap layer therebetween, and at least one of the substrates is provided with a flexible insulating transparent organic material film. A transparent touch panel provided with a transparent conductive film provided on two opposing substrate surfaces, and an external connection electrode portion for extracting an electric signal to the outside provided on an inner peripheral portion between the substrates so as to close a gap between the substrates. Wherein the thickness of the external electrode connection portion closing the inter-substrate gap is 90 μm or less at least at the innermost peripheral portion, and the distance between the two transparent substrates corresponds to the outermost peripheral side of the external connection electrode portion. The portion corresponding to the innermost side of the external electrode connection portion is smaller than the portion to be connected, and the breaking limit distance from the innermost side of the external connection electrode portion is 2.5 mm or less.
【００１４】本発明者らは、前述の課題を鋭意検討した
結果、外部接続電極部の厚みを適切に選択することで、
前述の課題を解決できることを見出した。すなわち、２
枚の基板間内側外周部の空隙を塞ぎつつ、所定の間隔で
基板の貼り合わせを保持するように機能する外部接続電
極部の最内周側の厚みを限りなく零に近づければ良いこ
とがわかった。しかしながら、外部接続電極部を構成す
る電極層、絶縁層、そして接着層等のそれぞれの厚みを
零にすることはできない。しかしここで、機械的負荷に
耐えることができずタッチパネルとして利用できない領
域は、外部接続電極部の内周側縁から２．５ｍｍの位置
か、それよりも少ない。そのためには本発明によるとこ
ろの、外部接続電極部の厚みが少なくとも最内周側の部
分では９０μｍ以下であり、そして２枚の透明基板間の
距離が、該外部接続電極部の最外周側に対応する部分よ
り該外部電極接続部の最内周側に対応する部分で小さい
ことが必要である。The present inventors have conducted intensive studies on the above-mentioned problems, and as a result, by appropriately selecting the thickness of the external connection electrode portion,
It has been found that the aforementioned problems can be solved. That is, 2
It is sufficient that the thickness of the innermost peripheral side of the external connection electrode portion that functions to hold the bonding of the substrates at a predetermined interval while closing the gap of the inner peripheral portion between the substrates is as close to zero as possible. all right. However, the thicknesses of the electrode layer, the insulating layer, the adhesive layer, and the like constituting the external connection electrode portion cannot be reduced to zero. However, here, the area that cannot withstand a mechanical load and cannot be used as a touch panel is located at a position 2.5 mm from the inner peripheral edge of the external connection electrode portion or smaller. For this purpose, according to the present invention, the thickness of the external connection electrode portion is at least 90 μm at least at the innermost peripheral portion, and the distance between the two transparent substrates is smaller than the outermost peripheral portion of the external connection electrode portion. It is necessary that the portion corresponding to the innermost peripheral side of the external electrode connection portion be smaller than the corresponding portion.
【００１５】さらに、機械的負荷に耐えることができず
タッチパネルとして利用できない領域は、外部接続電極
部の内周側縁から０．５ｍｍの位置よりも少ないことが
より好ましい。そのためには本発明によるところの、外
部接続電極部の厚みが少なくとも最内周側の部分では１
０μｍ以下であることが好ましい。Further, it is more preferable that the area that cannot withstand a mechanical load and cannot be used as a touch panel is smaller than a position 0.5 mm from the inner peripheral edge of the external connection electrode portion. For this purpose, according to the present invention, the thickness of the external connection electrode portion is at least 1 at the innermost peripheral portion.
It is preferably 0 μm or less.
【００１６】また本発明における外部接続電極部の厚み
は、その内周側から外周側に渡って大きく、例えばその
厚みは階段状に変化するものであっても、あるいは連続
的に変化するものであっても良い。それらにおいて、少
なくともその最内周側の部分で９０μｍ以下であること
により本発明の効果を達成できる。また２枚の透明基板
間の距離が、該外部接続電極部の最外周側に対応する部
分より該外部電極接続部の最内周側に対応する部分で小
さくすることにより、外部接続電極部の機械強度を十分
高く維持でき、タッチパネル外周部の機械的耐久性がさ
らに向上するとともに、変位破壊限界距離が短くなりタ
ッチパネルの面積がより大きくなる。The thickness of the external connection electrode portion in the present invention is large from the inner peripheral side to the outer peripheral side. For example, the thickness varies stepwise or continuously. There may be. Among them, the effect of the present invention can be achieved by making the innermost peripheral portion at least 90 μm or less. Further, the distance between the two transparent substrates is made smaller at a portion corresponding to the innermost peripheral side of the external electrode connection portion than at a portion corresponding to the outermost peripheral side of the external connection electrode portion, so that the external connection electrode portion has a smaller distance. The mechanical strength can be maintained at a sufficiently high level, the mechanical durability of the outer periphery of the touch panel is further improved, and the critical distance for displacement and destruction is shortened, and the area of the touch panel is increased.
【００１７】[0017]
【実施例】本発明の効果を確認するために、次のように
して矩形で枚葉の透明タッチパネルを製作し、その機械
的耐久性を評価した。EXAMPLES In order to confirm the effects of the present invention, a rectangular single-sheet transparent touch panel was manufactured as follows, and its mechanical durability was evaluated.
【００１８】［参考例］ まず参考例として、図１に、外部接続電極部の厚みの厚
みが均一である透明タッチパネルの外周部の断面図を示
す。図中、１ａは透明タッチパネルを示す。そして１１
ａと１２ａは可撓性を有する絶縁性透明有機物フィルム
である、厚さ１７５μｍのポリエチレンテレフタレート
フィルムからなる基板。２１ａと２２ａは基板１１ａと
１２ａ上にそれぞれ形成した厚さ０．０１９μｍのＩＴ
Ｏからなる透明導電性膜。そして３０ａは、外部に電気
信号を取り出すための銀ペースト（東洋紡績製ＤＷ２５
０Ｈ）からなる電極層３１ａと、アクリル系絶縁剤（東
洋紡績製ＦＣ２３０Ｇ２９）からなる絶縁層３２ａと、
アクリル系粘着剤（帝国インキ製ＴＡＣ２８００）から
なる接着層３３ａとによって構成した外部接続電極部で
あり、これら各層はスクリーン印刷法によって形成して
いる。さらに４０ａは空隙部を示す。また５０ａは外部
接続電極部の最内周側の厚み、また６０ａは外部接続電
極部の最外周側の厚みを示す。Reference Example First, as a reference example, FIG. 1 shows a cross-sectional view of an outer peripheral portion of a transparent touch panel in which the thickness of an external connection electrode portion is uniform. In the figure, 1a indicates a transparent touch panel. And 11
a and 12a are substrates made of a polyethylene terephthalate film having a thickness of 175 μm, which is a flexible insulating transparent organic material film. Reference numerals 21a and 22a denote the 0.019 μm-thick IT formed on the substrates 11a and 12a, respectively.
A transparent conductive film made of O. And 30a is a silver paste (Toyobo DW25) for extracting an electric signal to the outside.
0H), an insulating layer 32a made of an acrylic insulating agent (Toyobo FC230G29),
An external connection electrode portion composed of an adhesive layer 33a made of an acrylic adhesive (TAC2800 manufactured by Teikoku Ink), and these layers are formed by a screen printing method. Further, 40a indicates a void. Reference numeral 50a denotes the thickness of the external connection electrode on the innermost peripheral side, and reference numeral 60a denotes the thickness of the external connection electrode on the outermost peripheral side.
【００１９】この参考例では外部接続電極部３０ａを、
外周側から内周側にかけて厚みが均一になるように形成
した。すなわち外部接続電極部３０ａの最内周側の厚み
５０ａから最外周側の厚み６０ａまでを同じ９０μｍと
した。In this embodiment, the external connection electrode portion 30a is
It was formed such that the thickness became uniform from the outer peripheral side to the inner peripheral side. That is, the thickness from the innermost thickness 50a to the outermost thickness 60a of the external connection electrode portion 30a was the same 90 μm.
【００２０】そしてこのように製作した透明タッチパネ
ルの試料を硬質の台上に設置し、試料上の所定位置を、
所定の荷重をかけた押圧具で所定回数の押圧を行い、試
料に機械的負荷を与えた。そして機械的負荷の前後での
透明導電性膜の抵抗値を測定し、抵抗値の変化率で機械
的耐久性を評価した。図４にはこの評価試験の概略図を
示す。図中、７１は押圧具、７２は抵抗値測定計であ
る。Then, the sample of the transparent touch panel manufactured as described above is placed on a hard table, and a predetermined position on the sample is
The sample was pressed a predetermined number of times with a pressing tool to which a predetermined load was applied, and a mechanical load was applied to the sample. The resistance of the transparent conductive film before and after the mechanical load was measured, and the mechanical durability was evaluated based on the rate of change in the resistance. FIG. 4 shows a schematic diagram of this evaluation test. In the figure, 71 is a pressing tool, and 72 is a resistance value measuring meter.
【００２１】ここで押圧具７１には、材質がポリアセタ
ールで、先端が半径約０．８ｍｍの半球状になった物を
用いた。さらに押圧具７１で試料上をなぞる際には、垂
直に立てた押圧具７１に５２０ｇｆの荷重をかけた。ま
た図４に示すように、なぞって押圧を行う作業は、押圧
をかける側の透明導電性膜２１ａと接する電極層３１ａ
が接続された外部接続電極部の内周側の縁と平行に、そ
の縁から距離Ｌ離れた位置で試料の端から端まで行っ
た。このとき距離Ｌは、試料ごとに０．５〜５．０ｍｍ
の範囲において０．５ｍｍ間隔で変えた。またこの押圧
は、それぞれの試料ごとに同じ位置で１０回繰り返し
た。そしてこうした機械的負荷の前後での、押圧をかけ
た側の透明導電性膜の抵抗値を測定した。Here, as the pressing tool 71, a material made of polyacetal and having a hemispherical tip with a radius of about 0.8 mm was used. Further, when tracing the sample with the pressing tool 71, a load of 520 gf was applied to the pressing tool 71 which was set up vertically. Further, as shown in FIG. 4, the operation of tracing and pressing is performed by the electrode layer 31a in contact with the transparent conductive film 21a on the side to be pressed.
In parallel with the inner peripheral edge of the external connection electrode portion to which the sample was connected and at a distance L from the edge to the end of the sample. At this time, the distance L is 0.5 to 5.0 mm for each sample.
In the range of 0.5 mm at intervals of 0.5 mm. This pressing was repeated 10 times at the same position for each sample. The resistance value of the transparent conductive film on the pressed side before and after such a mechanical load was measured.
【００２２】そして機械的負荷をかける前の抵抗値Ｒ０
と、機械的負荷後の抵抗値Ｒとの比の、Ｒ／Ｒ０が１．
１以上になった場合は、透明導電性膜の破壊限界を越え
たものと判断した。このＲ／Ｒ０が破壊限界を越えない
ぎりぎりの距離Ｌを、破壊限界距離と見なした。The resistance value R0 before applying a mechanical load
And R / R0 of the ratio of the resistance value R after mechanical loading to 1.
When the value was 1 or more, it was determined that the breaking limit of the transparent conductive film was exceeded. The distance L just before R / R0 exceeds the breaking limit was regarded as the breaking limit distance.
【００２３】［実施例１］ 図２は、本発明の一実施例を示す透明チッチパネルの外
周部の断面図である。この図２中の３０ｂは、外部に電
気信号を取り出すための電極層３１ｂ、絶縁層３２ｂ、
接着層３３ｂとによって構成した外部接続電極部であ
り、これら各層はスクリーン印刷法によって形成してい
る。さらに５０ｂは外部接続電極部の最内周側の厚み、
また６０ｂは外部接続電極部の最外周側の厚みを示す。
そして実施例１では外部接続電極部３０ｂを、外周側か
ら内周側にかけてその厚みが階段状に変化するように形
成した。すなわち外部接続電極部３０ｂの最内周側の厚
み５０ｂを１０μｍ、最外周側の厚み６０ｂを９０μｍ
として、２枚の透明基板間の距離が、該外部接続電極部
の最外周側に対応する部分より該外部電極接続部の最内
周側に対応する部分で小さくした。このために電極層３
１ｂは、３回に分けてスクリーン印刷して形成した。こ
れ以外は、参考例と同様にして透明タッチパネルを製作
した。そして参考例と同様に評価試験を行ったところ、
透明導電性膜の破壊限界距離は０．５ｍｍであった。Embodiment 1 FIG. 2 is a sectional view of an outer peripheral portion of a transparent touch panel according to an embodiment of the present invention. Reference numeral 30b in FIG. 2 denotes an electrode layer 31b for taking out an electric signal to the outside, an insulating layer 32b,
This is an external connection electrode portion constituted by the adhesive layer 33b, and these layers are formed by a screen printing method. Further, 50b is the thickness of the innermost peripheral side of the external connection electrode portion,
Reference numeral 60b denotes the outermost peripheral thickness of the external connection electrode portion.
In the first embodiment, the external connection electrode portion 30b is formed so that its thickness changes stepwise from the outer peripheral side to the inner peripheral side. That is, the innermost thickness 50b of the external connection electrode portion 30b is 10 μm, and the outermost thickness 60b is 90 μm.
The distance between the two transparent substrates was made smaller at a portion corresponding to the innermost periphery of the external electrode connection portion than at a portion corresponding to the outermost periphery of the external connection electrode portion. For this purpose, the electrode layer 3
1b was formed by screen printing three times. Except for this, a transparent touch panel was manufactured in the same manner as in the reference example. Then, when an evaluation test was performed in the same manner as the reference example,
The breaking limit distance of the transparent conductive film was 0.5 mm.
【００２４】［実施例２］ また図３は本発明の別の実施例を示す透明チッチパネル
の外周部の断面図である。この図３中の３０ｃは、外部
に電気信号を取り出すための電極層３１ｃ、絶縁層３２
ｃ、接着層３３ｃとによって構成した外部接続電極部で
あり、これら各層はスクリーン印刷法によって形成して
いる。さらに５０ｃは外部接続電極部の最内周側の厚
み、また６０ｃは外部接続電極部の最外周側の厚みを示
す。そして外部接続電極部３０ｃを、外周側から内周側
にかけてその厚みが連続的に変化するように形成した。
すなわち外部接続電極部３０ｃの最内周側の厚み５０ｃ
を１０μｍ、最外周側の厚み６０ｃを９０μｍとした。
そのために電極層３１ｃは、位置によって開口度の異な
るスクリーン印刷の版を用いて形成した。これ以外は、
参考例と同様にして透明タッチパネルを製作した。そし
て参考例と同様に評価試験を行ったところ、透明導電性
膜の破壊限界距離は０．５ｍｍであった。Embodiment 2 FIG. 3 is a sectional view of an outer peripheral portion of a transparent touch panel showing another embodiment of the present invention. An electrode layer 31c for taking out an electric signal to the outside and an insulating layer 32 are shown in FIG.
c, an external connection electrode portion composed of an adhesive layer 33c, and these layers are formed by a screen printing method. Further, 50c indicates the thickness on the innermost peripheral side of the external connection electrode portion, and 60c indicates the thickness on the outermost peripheral side of the external connection electrode portion. The external connection electrode portion 30c was formed such that its thickness continuously changed from the outer peripheral side to the inner peripheral side.
That is, the thickness 50c on the innermost peripheral side of the external connection electrode portion 30c
Was set to 10 μm, and the outermost peripheral thickness 60c was set to 90 μm.
For this purpose, the electrode layer 31c was formed using a screen printing plate having a different opening degree depending on the position. Otherwise,
A transparent touch panel was manufactured in the same manner as in the reference example. When an evaluation test was performed in the same manner as in the Reference Example, the breaking distance of the transparent conductive film was 0.5 mm.
【００２５】［比較例１］ 比較例１では、外部接続電極部３０ａの最内周側の厚み
５０ａから最外周側の厚み６０ａまでを１１０μｍにし
た以外は、参考例と同様にして透明タッチパネルを製作
した。そして参考例と同様に評価試験を行ったところ、
透明導電性膜の破壊限界距離は３．５ｍｍであった。Comparative Example 1 In Comparative Example 1, a transparent touch panel was prepared in the same manner as in the reference example except that the thickness from the innermost thickness 50a to the outermost thickness 60a of the external connection electrode portion 30a was 110 μm. Made. Then, when an evaluation test was performed in the same manner as the reference example,
The breaking limit distance of the transparent conductive film was 3.5 mm.
【００２６】[0026]
【発明の効果】以上説明したとおり、本発明によって透
明タッチパネルにおける透明導電性膜の破壊限界距離は
２．５ｍｍ以下に短くできる。このように本発明によっ
て、外周部の機械的耐久性を向上させ、利用できる面積
を拡大させた透明タッチパネルを得ることができる。す
なわち表示画面のサイズに合わせて外形の制限を受ける
透明タッチパネルにおいて、外周部の近傍ぎりぎりにま
で有効に文字入力や描画入力を行うことが可能な透明タ
ッチパネルを得ることができる。As described above, the breaking distance of the transparent conductive film in the transparent touch panel can be reduced to 2.5 mm or less according to the present invention. As described above, according to the present invention, it is possible to obtain a transparent touch panel in which the mechanical durability of the outer peripheral portion is improved and the usable area is enlarged. That is, in a transparent touch panel whose outer shape is restricted according to the size of the display screen, it is possible to obtain a transparent touch panel capable of effectively performing character input and drawing input up to the vicinity of the outer peripheral portion.
【図１】透明タッチパネル外周部概略断面図（参考例：
外部接続電極部の厚みが均一）FIG. 1 is a schematic sectional view of an outer peripheral portion of a transparent touch panel (reference example:
(The thickness of the external connection electrode is uniform.)
【図２】透明タッチパネル外周部概略断面図（外部接続
電極部厚みが階段状変化）FIG. 2 is a schematic cross-sectional view of an outer peripheral portion of a transparent touch panel (the thickness of an external connection electrode portion changes stepwise).
【図３】透明タッチパネル外周部概略断面図（外部接続
電極部厚みが連続的変化）FIG. 3 is a schematic cross-sectional view of an outer peripheral portion of a transparent touch panel (the thickness of an external connection electrode portion changes continuously).
【図４】評価試験の概念図FIG. 4 is a conceptual diagram of an evaluation test.
１ａ 透明タッチパネル １１ａ 基板 ２１ａ 透明導電性膜 ３０ａ 外部接続電極部 ３１ａ 電極層 ３２ａ 絶縁層 ３３ａ 接着層 ４０ａ 空隙 ５０ａ 外部接続電極部の内周側厚み ６０ａ 外部接続電極部の外周側厚み 1a Transparent touch panel 11a Substrate 21a Transparent conductive film 30a External connection electrode portion 31a Electrode layer 32a Insulation layer 33a Adhesive layer 40a Void 50a Inner circumference thickness of external connection electrode portion 60a Outer circumference thickness of external connection electrode portion
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−141719（ＪＰ，Ａ) 特開 平２−256114（ＪＰ，Ａ) 実開 昭64−35433（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G06F 3/03 - 3/033 H01H 13/00 - 13/76 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-141719 (JP, A) JP-A-2-256114 (JP, A) JP-A 64-35433 (JP, U) (58) Survey Field (Int.Cl. 7 , DB name) G06F 3/03-3/033 H01H 13/00-13/76
Claims (2)
貼り合わせ、その際少なくとも一方の基板は可撓性を有
する絶縁性透明有機物フィルムを用い、向かい合った２
枚の基板面上には透明導電膜を設け、さらに外部に電気
信号を取り出すための外部接続電極部を基板間空隙を塞
ぐように基板間内側の外周部に設けた透明タッチパネル
において、基板間空隙を塞ぐ外部電極接続部の厚みが少
なくとも最内周側の部分で９０μｍ以下であり、かつ、
２枚の透明基板間の距離が、該外部接続電極部の最外周
側に対応する部分より該外部電極接続部の最内周側に対
応する部分で小さく、かつ外部接続電極部の最内周側か
らの破壊限界距離が２．５ｍｍ以下であることを特徴と
する透明タッチパネル。1. A method in which two transparent substrates are bonded together with a gap layer provided therebetween, and at least one of the substrates is formed of a flexible insulating transparent organic material film.
In a transparent touch panel, a transparent conductive film is provided on the surface of one of the substrates, and an external connection electrode portion for extracting an electric signal to the outside is provided on an inner peripheral portion between the substrates so as to close the gap between the substrates. The thickness of the external electrode connection portion closing at least 90 μm or less at the innermost peripheral portion, and
The distance between the two transparent substrates is the outermost circumference of the external connection electrode portion.
To the innermost peripheral side of the external electrode connection part from the part corresponding to the
A transparent touch panel, characterized in that a corresponding portion is small and a breaking limit distance from the innermost peripheral side of the external connection electrode portion is 2.5 mm or less.
が、少なくとも最内周側の部分で１０μｍ以下であるこ
とを特徴とする請求項１記載の透明タッチパネル。2. The transparent touch panel according to claim 1, wherein the thickness of the external connection electrode portion for closing the inter-substrate gap is 10 μm or less at least at the innermost peripheral portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34240692A JP3145217B2 (en) | 1992-12-22 | 1992-12-22 | Transparent touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34240692A JP3145217B2 (en) | 1992-12-22 | 1992-12-22 | Transparent touch panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06195176A JPH06195176A (en) | 1994-07-15 |
| JP3145217B2 true JP3145217B2 (en) | 2001-03-12 |
Family
ID=18353485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34240692A Expired - Fee Related JP3145217B2 (en) | 1992-12-22 | 1992-12-22 | Transparent touch panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3145217B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001249766A (en) | 2000-03-06 | 2001-09-14 | Hitachi Ltd | Touch panel and picture input type liquid crystal display device |
| KR100472364B1 (en) * | 2001-12-26 | 2005-03-08 | 엘지.필립스 엘시디 주식회사 | Touch Panel and Fabricated Method Thereof |
| KR100433225B1 (en) * | 2001-12-27 | 2004-05-27 | 엘지.필립스 엘시디 주식회사 | Touch Panel and Fabricated Method Thereof |
| KR100822196B1 (en) * | 2002-03-08 | 2008-04-16 | 삼성에스디아이 주식회사 | Touch panel |
| KR100825073B1 (en) * | 2006-04-06 | 2008-04-24 | 박종진 | Method for manufacturing a touch-sensor pad and the pad thereof |
| JP2009086752A (en) * | 2007-09-27 | 2009-04-23 | Seiko Precision Inc | Illumination touch panel and manufacturing method of the same |
| JP4692659B2 (en) * | 2009-03-16 | 2011-06-01 | Ｔｄｋ株式会社 | Touch panel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04141719A (en) * | 1990-10-02 | 1992-05-15 | Catalysts & Chem Ind Co Ltd | Analog type touch panel |
-
1992
- 1992-12-22 JP JP34240692A patent/JP3145217B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06195176A (en) | 1994-07-15 |
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