JP2007004339A - Antiglare protection coat and touch panel sensor including the same - Google Patents

Antiglare protection coat and touch panel sensor including the same Download PDF

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JP2007004339A
JP2007004339A JP2005181672A JP2005181672A JP2007004339A JP 2007004339 A JP2007004339 A JP 2007004339A JP 2005181672 A JP2005181672 A JP 2005181672A JP 2005181672 A JP2005181672 A JP 2005181672A JP 2007004339 A JP2007004339 A JP 2007004339A
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conductive film
filler
touch panel
protective coat
layer
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Naohiro Wakabayashi
尚宏 若林
Koutarou Tanimura
功太郎 谷村
Masabumi Yamagami
正文 山上
Yoshiyuki Fujikawa
佳之 藤川
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Gunze Ltd
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Gunze Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a touch panel hardly causing sedimentation or separation of filler mixed in a protection coat and requiring no application of chemical treatment to a glass substrate itself for reducing influence on an environment. <P>SOLUTION: This touch panel includes a panel base material, a conductive film formed on the surface of the panel base material, a base layer layered on the conductive film, and an AG layer layered on the base layer and including mixed filler. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えばCRT又は液晶ディスプレイの画面に重ねられ、同画面に触れた指等の位置を電気的に検出するためのタッチパネルに関し、特に静電容量方式タッチパネルにおける防眩性を備えた表面保護コート技術に関する。   The present invention relates to a touch panel that is superimposed on a screen of, for example, a CRT or a liquid crystal display and electrically detects the position of a finger or the like that touches the screen, and in particular, surface protection with antiglare property in a capacitive touch panel. Related to coat technology.

ディスプレイ等の画面に重ねて使用される透明のタッチパネルには、抵抗膜方式、光学方式、静電容量方式、超音波方式等種々の方式があり、使用用途により使い分けられている。例えばATM(現金自動預け払い機)や券売機、案内画面等は、不特定多数の人がタッチするため耐久性・耐傷性が求められ、静電容量方式のタッチパネルが多く用いられている。   There are various methods such as a resistive film method, an optical method, a capacitance method, and an ultrasonic method for transparent touch panels used on a screen such as a display. For example, an ATM (automated teller machine), a ticket vending machine, a guidance screen, etc. are required to be durable and scratch-resistant because they are touched by an unspecified number of people, and capacitive touch panels are often used.

静電容量方式のタッチパネルはタッチパネルセンサとコントローラから構成される。タッチパネルセンサは、図3や図4に示すように、パネル用基材として例えばガラス基板100を用い、その表面及び/または裏面に表面導電膜14や裏面導電膜16を成膜し、接触位置検出のためやディスプレイから発生するノイズをシールドするために用いる。ガラス基板100の表面に検出用の表面導電膜14を成膜した場合は、保護コート112で覆って表面導電膜14の耐久性を強化する。   A capacitive touch panel includes a touch panel sensor and a controller. As shown in FIGS. 3 and 4, the touch panel sensor uses, for example, a glass substrate 100 as a panel base material, and forms a surface conductive film 14 and a back conductive film 16 on the front surface and / or back surface thereof to detect a contact position. This is used to shield noise generated from the display and the display. When the surface conductive film 14 for detection is formed on the surface of the glass substrate 100, the surface conductive film 14 is covered with a protective coat 112 to enhance the durability of the surface conductive film 14.

静電容量方式のタッチパネルは、指がタッチパネルセンサ110または120の検出用の導電膜にタッチすると、タッチした人にも充電電荷が蓄積され、タッチ前後の微小電荷変化をコントローラ(図示せず)が検出・計算してタッチ位置を求める。   In the capacitive touch panel, when a finger touches the detection conductive film of the touch panel sensor 110 or 120, the charged charge is accumulated in the touched person, and a minute change in charge before and after the touch is recorded by a controller (not shown). Detect / calculate the touch position.

上記タッチ前後の微小電荷変化検出方式としては、マトリックス方式(デジタル方式)とアナログ方式とがある。   The micro charge change detection method before and after the touch includes a matrix method (digital method) and an analog method.

マトリックス方式は、検出用の導電膜の検出領域をマトリックス状に区切ったパターンを全面に配置し、タッチした時に最も変化の大きい領域を入力位置として検出する方式である。マトリックス方式の特徴としては、マトリックスの領域毎にタッチの有無を検出するため検出可能距離が比較的長く、例えば図4のように、ガラス基板100の裏面に設けた裏面導電膜16の検出パターンによってもタッチ位置の検出が可能である。その場合、タッチする面は、タッチパネルセンサ120のガラス基板100の表面であるため、タッチによる表面耐久性はガラス基板100の表面耐久性になるが、その反面検出距離が長いため、検出の分解能は低くなる。   The matrix method is a method in which a pattern in which detection regions of a conductive film for detection are divided in a matrix is arranged on the entire surface, and a region having the largest change is detected as an input position when touched. As a feature of the matrix method, the detectable distance is relatively long because the presence / absence of touch is detected for each area of the matrix. For example, as shown in FIG. 4, the detection pattern of the back conductive film 16 provided on the back surface of the glass substrate 100 The touch position can also be detected. In that case, since the surface to be touched is the surface of the glass substrate 100 of the touch panel sensor 120, the surface durability by the touch becomes the surface durability of the glass substrate 100, but on the other hand, since the detection distance is long, the detection resolution is Lower.

アナログ方式は、例えばタッチパネルセンサ110(図3参照)のように、一様な検出用の表面導電膜14を備え、タッチした時の電流変化の比からパネル入力位置を計算する方式であり、検出座標分解能が高いというメリットがある。しかし、表面導電膜14がタッチパネルセンサ110の最表面であると、表面導電膜14は薄いためにタッチによる表面耐久性が弱いという課題がある。そのため、通常入力部分の表面導電膜14を保護するため、透明な保護コート112が形成される。この保護コートは、通常ガラス系材料を使用し、スバッタやウェットコートなどの方法で積層される。   The analog method includes a uniform surface conductive film 14 for detection, such as a touch panel sensor 110 (see FIG. 3), and calculates a panel input position from a ratio of current change when touched. There is an advantage of high coordinate resolution. However, if the surface conductive film 14 is the outermost surface of the touch panel sensor 110, the surface conductive film 14 is thin, so that there is a problem that surface durability due to touch is weak. Therefore, a transparent protective coat 112 is formed to protect the surface conductive film 14 at the normal input portion. This protective coat is usually made of a glass-based material and laminated by a method such as a sputtering or wet coat.

また、タッチパネルセンサ110表面の処理としては、表面凹凸が滑らかなクリア外観のものと、表面凹凸が大きく反射光を拡散して写り込みを防止するAG(Anti Glare:防眩性)外観のものと、大別して2種類ある。   Further, the touch panel sensor 110 has a surface with a clear appearance with smooth surface unevenness and an AG (Anti Glare) appearance with a large surface unevenness that diffuses reflected light to prevent reflection. There are roughly two types.

クリア外観パネルは、パネル裏面側に配置されるディスプレイの画像をほぼそのまま透過してみることができる反面、パネル表面での反射や写り込みが大きくなる。従って医療用パネルなどのように比較的暗い場所で鮮明な画像が必要な場合に用いられる。   The clear exterior panel can transmit the image of the display arranged on the back side of the panel almost as it is, but reflection and reflection on the panel surface increase. Therefore, it is used when a clear image is required in a relatively dark place such as a medical panel.

一方、上記のように静電容量方式のタッチパネル110、120は耐久性に優れるため、上述のようにATMや券売機等の、屋外など画面に強い光が当たる場所での用途や、不特定多数の人が操作する公共用の用途に広く用いられている。このため、クリア外観パネルに顕著な、反射や写り込みを制限する為に、表面凹凸が大きくして防眩性を高める表面処理(以下、本明細書において「AG表面処理」という。)を施したパネルが使用されることが多い。   On the other hand, since the capacitive touch panels 110 and 120 are excellent in durability as described above, they are used in places where the screen is exposed to strong light, such as ATMs and ticket machines, as described above, and unspecified many It is widely used for public use operated by many people. Therefore, a surface treatment (hereinafter referred to as “AG surface treatment” in the present specification) is performed to increase the surface unevenness and enhance the antiglare property in order to limit the reflection and reflection that are remarkable in the clear appearance panel. Panels are often used.

AG外観のパネルを枚葉処理で製造するための−般的なAG表面処理方法としては、例えばガラス基板100の表面を化学的に荒らす処理、例えばフロスト処理がある。例えば、マトリックス方式のタッチパネルセンサ120の裏面導電膜16でタッチ信号を検出する場合、検出に関係無いガラス基板の最表面をフロスト処理することで、AG外観のパネル構成にすることができる。   As a general AG surface treatment method for manufacturing a panel having an AG appearance by single-wafer processing, for example, there is a treatment for chemically roughening the surface of the glass substrate 100, for example, a frost treatment. For example, when the touch signal is detected by the back surface conductive film 16 of the matrix-type touch panel sensor 120, the outermost surface of the glass substrate that is not related to the detection is subjected to frost processing, so that an AG exterior panel configuration can be obtained.

アナログ方式静電容量パネルの場合、上記の通り、検出精度の関係上、最表面に設けた表面導電膜14でのタッチの検出が必要になる。そのため、導電膜保護のために保護コート112を設ける必要がある。しかし、フロスト加工されたガラス基材100の表面上に、表面耐久性を保つ為に十分な厚みの保護コート112を積層した場合、ガラス基板100の表面の凹凸に保護コート112が埋まって最表面が平らな保護コート層になるため、AG(防眩)性がなくなる。   In the case of an analog capacitive panel, as described above, it is necessary to detect a touch with the surface conductive film 14 provided on the outermost surface because of detection accuracy. Therefore, it is necessary to provide the protective coat 112 for protecting the conductive film. However, when the protective coating 112 having a sufficient thickness is laminated on the surface of the glass substrate 100 that has been subjected to frost processing, the protective coating 112 is buried in the unevenness of the surface of the glass substrate 100 so that the outermost surface is covered. Becomes a flat protective coat layer, so that the AG (anti-glare) property is lost.

そのため、このような場合、例えばガラス基板裏面にもフロスト加工を施して、AG(防眩)性を付与する構成が考えられる。しかし、フロスト処理をした場合、ガラス基板のコストが高くなるだけでなく、化学処理でフッ酸等を使用するため環境への影響が大きい製造方法になるという課題が生じる。   Therefore, in such a case, for example, a configuration in which frost processing is also applied to the back surface of the glass substrate to impart AG (anti-glare) properties can be considered. However, when the frost treatment is performed, not only the cost of the glass substrate is increased, but also a problem arises that the production method has a large influence on the environment because hydrofluoric acid or the like is used in the chemical treatment.

また、特許文献1には図5にのように、基板上の導電膜上に黒色の球状微粒子(フィラ)15を分散した塗料層112を設けたディスプレイ表面材が開示されている。特許文献1に記載のディスプレイ表面材は、球状微粒子15の平均粒径が塗料層の厚みの0.1〜2倍であり、球状微粒子15の一部が塗料層112の表面から突出していることを特徴の一つとしており、ガラス基板のフロスト処理をせずに防眩性を得ることができると考えられる。   Further, Patent Document 1 discloses a display surface material in which a paint layer 112 in which black spherical fine particles (filler) 15 are dispersed is provided on a conductive film on a substrate as shown in FIG. In the display surface material described in Patent Document 1, the average particle diameter of the spherical fine particles 15 is 0.1 to 2 times the thickness of the paint layer, and a part of the spherical fine particles 15 protrudes from the surface of the paint layer 112. It is considered that the antiglare property can be obtained without frosting the glass substrate.

特開平10−139486号公報JP-A-10-139486

しかし、球状微粒子の一部が塗料層の表面から突出している特許文献1に記載のディスプレイ表面材は、不特定多数の人がその表面にタッチを繰り返すに従って球状微粒子(フィラ)が塗料層に沈下し、使用に伴い防眩性が失われてしまう。あるいは一般に、フィラの硬度が高い場合は、いわゆるフィラの剥離により防眩性が失われてしまう。   However, in the display surface material described in Patent Document 1 in which a part of the spherical fine particles protrudes from the surface of the paint layer, the spherical fine particles (filler) sink into the paint layer as an unspecified number of people repeatedly touch the surface. However, the antiglare property is lost with use. Or generally, when the hardness of the filler is high, the antiglare property is lost due to peeling of the filler.

本発明は以上の課題に鑑みてなされたものであり、保護コート(塗料層)に混入されたフィラ(球状微粒子等)の沈下や剥離が生じにくく、防眩性に関する耐用寿命が長い保護コートを提供することを目的とする。   The present invention has been made in view of the above problems, and a protective coat having a long service life with respect to anti-glare properties, in which the filler (spherical fine particles, etc.) mixed in the protective coat (paint layer) is unlikely to sink or peel off. The purpose is to provide.

また本発明の別の目的は、ガラス基板自体に化学的な処理を行わず環境に与える影響を小さくしたタッチパネルを提供することにある。即ち、本発明は、コストが低い製造方法により十分な表面保護機能をもつとともに、上記耐用性の高い防眩性を付与することができる保護コートを設けた横成のタッチパネルを提供することを目的とする。   Another object of the present invention is to provide a touch panel that reduces the influence on the environment without chemically treating the glass substrate itself. That is, an object of the present invention is to provide a horizontal touch panel provided with a protective coat that has a sufficient surface protection function by a low-cost manufacturing method and can impart anti-glare properties with high durability. And

本発明の防眩性保護コートは、パネル用基材の表面に導電膜を成膜したタッチパネルの、該導電膜を保護する保護コートであって、前記導電膜の上に積層したベース層と、前記ベース層の上に積層し、フィラを混入したAG(Anti Glare:防眩性)層と、を含む。   The anti-glare protective coat of the present invention is a protective coat for protecting the conductive film of a touch panel in which a conductive film is formed on the surface of a substrate for a panel, and a base layer laminated on the conductive film, And an AG (Anti Glare) layer laminated on the base layer and mixed with filler.

本発明の防眩性保護コートは、径がφ0.5μm乃至φ1.5μmのシリカフィラであり得る。   The antiglare protective coat of the present invention may be a silica filler having a diameter of φ0.5 μm to φ1.5 μm.

本発明の防眩性保護コートは、フィラを混入したゾルゲル液を塗工して積層してもよい。   The antiglare protective coat of the present invention may be laminated by applying a sol-gel solution mixed with filler.

本発明の防眩性保護コートは、ポリシラザンであり得る。   The antiglare protective coat of the present invention may be polysilazane.

本発明のタッチパネルセンサは、パネル用基材と、前記パネル用基材の表面に成膜した導電膜と、前記導電膜の上に積層したベース層と、前記ベース層の上に積層し、フィラを混入したAG層と、を含む。   The touch panel sensor of the present invention includes a panel base material, a conductive film formed on the surface of the panel base material, a base layer laminated on the conductive film, and a laminate on the base layer. And an AG layer mixed with.

本発明のタッチパネルセンサの製造方法は、パネル用基材を準備するステップと、前記パネル用基材の表面に導電膜を成膜するステップと、前記導電膜の上にベース層を塗工するステップと、フィラを混入したAG層を前記ベース層の上に塗工するステップと、を含む。   The method for manufacturing a touch panel sensor of the present invention includes a step of preparing a panel base material, a step of forming a conductive film on the surface of the panel base material, and a step of applying a base layer on the conductive film And coating the AG layer mixed with filler on the base layer.

以下、本明細書において、パネル用基材とは、導電膜やフィルム、コーティング等を積層してパネルを製造するための板状の基材をいい、例えばクリアガラス、AGガラス等のガラス基材やその他表面が平滑なあるいは加工されたプラスチック基材等が相当する。   Hereinafter, in the present specification, the panel substrate means a plate-like substrate for producing a panel by laminating a conductive film, a film, a coating or the like, for example, a glass substrate such as clear glass or AG glass. And other plastic substrates having a smooth or processed surface.

また、本明細書において、タッチする面である表面に成膜した導電膜を表面導電膜と、ディスプレイに対向する面である裏面に成膜した導電膜を裏面導電膜という。   In this specification, a conductive film formed on the surface that is a surface to be touched is referred to as a front conductive film, and a conductive film formed on the back surface that is a surface facing the display is referred to as a back conductive film.

また、本明細書において、防眩性、防眩外観等はそれぞれAG性、AG外観等ともいう。
Moreover, in this specification, anti-glare property, anti-glare appearance, etc. are also referred to as AG property, AG appearance, etc.

本発明の防眩性保護コートは、塗工液にフィラを混入して防眩性を付与するが、基材表面にベース層と、フィラを混入したAG層を順に積層するため、フィラの沈下や剥離が少なく安定である。従って本発明の防眩性保護コートは、耐用性の高い防眩性を提供することができる。   The anti-glare protective coat of the present invention imparts anti-glare properties by mixing filler in the coating liquid. However, since the base layer and the AG layer mixed with filler are sequentially laminated on the substrate surface, And stable with little peeling. Therefore, the anti-glare protective coat of the present invention can provide anti-glare properties with high durability.

また、本発明の防眩性保護コートを用いれば、基材となるガラス基板等の表面を化学的なフロスト処理をする必要なく、基材の表面に防眩性保護コートを積層すればよいので、環境に影響を及ぼすことなく、より安価なガラス基板により光学設計が容易で十分な表面保護機能をもつとともに、耐用性の高い防眩性を持つタッチパネルを提供することができる。
Further, when the antiglare protective coat of the present invention is used, it is only necessary to laminate the antiglare protective coat on the surface of the base material without the need to chemically frost the surface of the glass substrate or the like as the base material. In addition, it is possible to provide a touch panel having an antiglare property with high durability and an optical design that is easy to optical design and has a sufficient surface protection function without affecting the environment.

図1は、本実施形態にかかるアナログ方式静電容量タッチパネルセンサ10の断面図である。タッチパネルセンサ10は、ガラス基板100と、ガラス基板100の表面に成膜した表面導電膜14と、表面導電膜14の上に積層したベース層3と、ベース層3の上に積層し、フィラ5を混入したAG層2とを含む。   FIG. 1 is a cross-sectional view of an analog capacitive touch panel sensor 10 according to the present embodiment. The touch panel sensor 10 includes a glass substrate 100, a surface conductive film 14 formed on the surface of the glass substrate 100, a base layer 3 laminated on the surface conductive film 14, a laminate on the base layer 3, and a filler 5 And the AG layer 2 mixed with.

このうち、表面導電膜14の上に積層したベース層3と、ベース層3の上に積層し、フィラ5を混入したAG層2を総称して防眩性保護コート1という。即ち、本発明の防眩性保護コート1は少なくとも2層からなり、第1層に耐久性確保のためのべ一ス層3、第2層にAG性付与のために、例えばシリカフィラ5を混入したコート液を用いて塗工、積層したAG層2を形成している。ただし、フィラ5を含まないべ一ス層3は表面導電膜14の上に2層以上積層してもよく、表面導電膜14の上にべ一ス層3、フィラ5を含むが両面滑らかな表面形状(本明細書において、「クリア表面」ともいう。)の層、およびAG層2をそれぞれ複数層積層してもよい。   Among these, the base layer 3 laminated on the surface conductive film 14 and the AG layer 2 laminated on the base layer 3 and mixed with the filler 5 are collectively referred to as an antiglare protective coat 1. That is, the anti-glare protective coating 1 of the present invention comprises at least two layers, a base layer 3 for ensuring durability in the first layer, and silica filler 5 for imparting AG properties to the second layer, for example. The coated and laminated AG layer 2 is formed using the mixed coating liquid. However, the base layer 3 that does not include the filler 5 may be laminated on the surface conductive film 14 in two or more layers, and the base layer 3 and the filler 5 are included on the surface conductive film 14 but both surfaces are smooth. A plurality of layers each having a surface shape (also referred to as “clear surface” in this specification) and the AG layer 2 may be laminated.

本実施形態のタッチパネルセンサ10はアナログ方式静電容量タッチパネルセンサ10であり、パネル用基材は、両面に均−な導電膜を設けた、滑らかな表面形状のガラス基板100を基材として使用する。   The touch panel sensor 10 of the present embodiment is an analog capacitive touch panel sensor 10, and the substrate for the panel uses a glass substrate 100 having a smooth surface shape with a uniform conductive film on both sides as a substrate. .

図1に表す本実施形態のアナログ方式静電容量タッチパネルセンサ10は、表面導電膜14のタッチエリア周囲に検出用電極20を設け、表面導電膜14を保護するためにタッチエリア上に防眩性保護コート1を設けている。   The analog capacitive touch panel sensor 10 of the present embodiment shown in FIG. 1 is provided with a detection electrode 20 around the touch area of the surface conductive film 14 and is antiglare on the touch area to protect the surface conductive film 14. A protective coat 1 is provided.

またガラス基板100裏面には、パネルを貼り合わせる液晶モニタ等からノイズをカットしたり、また浮遊容量の変化の影響を抑えるため、シールド用の裏面導電膜16及びシールド用電極22が設けられている。   Further, on the back surface of the glass substrate 100, a shield back surface conductive film 16 and a shield electrode 22 are provided in order to cut noise from a liquid crystal monitor or the like to which the panel is attached, and to suppress the influence of the change in stray capacitance. .

AG層2は、フィラ5を混入したゾルゲル液を塗工して積層する。ゾルゲル液としては例えばポリシラザンを用い、これをベース層3上に塗工することで本発明のタッチパネルセンサ10に防眩性を付与する。フィラ5は径がφ0.5〜φ1.5μmの範囲の、例えばシリカフィラ等の高温安定性のあるフィラが好適であるが、上記径の範囲は以下の事由を考慮して実験的に得られる。   The AG layer 2 is laminated by applying a sol-gel solution mixed with the filler 5. For example, polysilazane is used as the sol-gel liquid, and this is applied on the base layer 3 to impart antiglare properties to the touch panel sensor 10 of the present invention. The filler 5 is preferably a filler having a high temperature stability such as a silica filler having a diameter in the range of φ0.5 to φ1.5 μm. However, the range of the diameter is experimentally obtained in consideration of the following reasons. .

(粒径が大きすぎる場合)
・ヘイズ値を下げるためフィラ濃度を下げると、フィラ分布が疎となり、モアレの発生原因となる。
・粒径の大きいフィラを把持するためにはAG層の塗工厚を大きくする必要があり、乾燥ムラの原因となる。
・粒径が大きくなると沈降しやすくなり、塗工安定性が低くなる。
(If the particle size is too large)
-If the filler concentration is lowered to lower the haze value, the filler distribution becomes sparse and causes moire.
-In order to grip a filler with a large particle size, it is necessary to increase the coating thickness of the AG layer, which causes drying unevenness.
・ Since the particle size becomes larger, it becomes easier to settle and the coating stability becomes lower.

(粒径が小さすぎる場合)
・AG塗工面からフィラの凹凸を出すために、非常に薄い塗工膜厚制御が必要となる。
・絶対的なAG膜厚が薄いため、耐久性が下がる。
(If the particle size is too small)
・ It is necessary to control the coating thickness very thin in order to make the unevenness of the filler from the AG coating surface.
-Since the absolute AG film thickness is thin, durability is reduced.

次に、本発明のタッチパネルセンサ10の製造方法について説明する。   Next, a method for manufacturing the touch panel sensor 10 of the present invention will be described.

本発明のタッチパネルセンサ10の製造方法は、パネル用基材を準備するステップと、前記パネル用基材の表面に導電膜を成膜するステップと、前記導電膜の上にベース層を塗工するステップと、前記ベース層の上に積層し、フィラを混入したAG層を塗工するステップと、を含む。下記実施例1において、以上説明した本発明に係る防眩性保護コート及びタッチパネルセンサの製法の例を詳説する。
The manufacturing method of the touch panel sensor 10 of the present invention includes a step of preparing a panel base material, a step of forming a conductive film on the surface of the panel base material, and applying a base layer on the conductive film. And a step of laminating on the base layer and applying an AG layer mixed with filler. In the following Example 1, the example of the manufacturing method of the anti-glare protective coat and touch panel sensor according to the present invention described above will be described in detail.

本実施例の製造方法、積層条件について以下に説明する。   The manufacturing method and lamination conditions of this example will be described below.

・(ガラス基板)
パネル用基材であるガラス基板は、一般的なソーダガラスを用いた。厚みは不特定多数の人が触ることを想定した耐久性を考慮し、2.5mm〜3mmのガラス基板を使用するのが好ましい。
・ (Glass substrate)
A general soda glass was used as a glass substrate as a panel substrate. The thickness is preferably a glass substrate of 2.5 mm to 3 mm in consideration of durability assumed to be touched by an unspecified number of people.

導電膜については、後加熱工程による抵抗値変化等が少ない安定な材料、例えばSnOやATO(アンチモンドープ酸化錫)で形成されることが望ましい。本実施例では、SnOで形成された導電膜を用い、表面導電膜(検出用)のシート抵抗は1500〜2700Ω、裏面導電膜(シールド用)のシート抵抗は600〜1600Ωの範囲に設定した。 The conductive film is desirably formed of a stable material with little change in resistance value or the like due to a post-heating process, such as SnO 2 or ATO (antimony-doped tin oxide). In this example, a conductive film formed of SnO 2 was used, the sheet resistance of the front conductive film (for detection) was set to 1500 to 2700Ω, and the sheet resistance of the back conductive film (for shield) was set to a range of 600 to 1600Ω. .

・(塗エ方法)
保護コートのコート方法としては、印刷により行なった。その他の枚葉コート方法として、ダイコート、ディップコート、バーコート、スピンコート等の方法を用いることも可能である。
・ (Painting method)
As a coating method of the protective coat, printing was performed. Other sheet-fed coating methods such as die coating, dip coating, bar coating, and spin coating can also be used.

・(塗エ液)
透明保護コート層を形成するための無機材料として、次の2点を満たすゾルゲル液を選定した。
(A)固形分濃度が高い(Wet塗工に続く乾燥後のDry膜厚を確保するため)
(B)反応温度が低い(焼成温度が低いほど、導電膜シート抵抗の加熱変化が小さくなるため)
・ (Coating solution)
As an inorganic material for forming the transparent protective coat layer, a sol-gel solution satisfying the following two points was selected.
(A) High solid content (to ensure dry film thickness after drying following wet coating)
(B) The reaction temperature is low (because the lower the firing temperature, the smaller the heating change of the conductive film sheet resistance).

以上の条件を考慮の結果、本実施例においては、アクアミカ(AZエレクトロニックマテリアル株式会社製、ゾルゲル固形分濃度:20wt%)を採用した。(以下、「塗工液1」という。)   As a result of considering the above conditions, Aquamica (manufactured by AZ Electronic Material Co., Ltd., sol-gel solid content concentration: 20 wt%) was employed in this example. (Hereinafter referred to as “Coating liquid 1”.)

・(第1層塗工)
塗工液1を用いて、第1層(べ−ス層)をWet膜厚3.5μm(焼成後膜厚0.7μm)で塗工する。塗工後、IR焼成炉にて180℃195秒の条件で仮焼成を行う。
・ (First layer coating)
Using the coating liquid 1, the first layer (base layer) is applied with a wet film thickness of 3.5 μm (film thickness after firing 0.7 μm). After coating, provisional firing is performed in an IR firing furnace at 180 ° C. for 195 seconds.

・(第2層へのAG性付与)
AG性を付与するために、塗工液1にシリカフィラを添加・分散して塗工して、塗工膜表面に凹凸を形成する方法を採用した。
・ (AG imparting to the second layer)
In order to impart AG properties, a method was employed in which silica filler was added to and dispersed in the coating liquid 1 and coating was performed to form irregularities on the surface of the coating film.

・(塗工液改善)
ただし、標準の塗工液1の粘度は低い(1.1cp)ためフィラが沈降しやすく、経時的にフィラの分散状態にバラツキが発生し易いという問題がある。この沈降を抑制する方法としては、ストークスの沈降モデル式より、次の2点が考えられる。
(C)塗工液の粘度を上げる
(D)フィラの径を小さくする
・ (Coating solution improvement)
However, since the viscosity of the standard coating solution 1 is low (1.1 cp), there is a problem that the filler tends to settle and the dispersion state of the filler tends to vary with time. As a method for suppressing the sedimentation, the following two points can be considered from the Stokes sedimentation model.
(C) Increase the viscosity of the coating solution (D) Reduce the filler diameter

上記(C)の塗工液1の粘度を上げる方法としては、塗工液1の溶媒を高粘度の材料に変更することが考えられる。そこで、本実施例においては、反応性の高い塗工液1への適性があり、粘度が高く、濡れ性の良い溶媒を選定し、エクソンモービル社製エクソールD130(粘度7.5cp、沸点302℃)を採用した(エクソールD130を加え高粘化した塗工液を、以下「塗工液2」という。)。   As a method for increasing the viscosity of the coating liquid 1 (C), it is conceivable to change the solvent of the coating liquid 1 to a high-viscosity material. Therefore, in this embodiment, a solvent having high viscosity, high viscosity, and good wettability is selected in this example, and Exsol D130 (viscosity 7.5 cp, boiling point 302 ° C.) manufactured by ExxonMobil Co., Ltd. is selected. (The coating liquid that has been made highly viscous by adding Exol D130 is hereinafter referred to as “Coating liquid 2”).

添加するフィラは、表面凹凸を形成するためμmサイズの1次粒子で、塗工液2に分散した時に2次凝集が発生しにくいという条件が必要である。そこで本実施例では、日本触媒株式会社製シーフォスタ(シリカフィラ、球形1次粒子)を採用した。   The filler to be added is a primary particle having a size of μm in order to form surface irregularities, and it is necessary that the secondary agglomeration hardly occurs when dispersed in the coating liquid 2. Therefore, in this example, Nippon Shokubai Co., Ltd. Sea Foster (silica filler, spherical primary particles) was employed.

また、「(D)フィラの径を小さくする」という条件から、径が小さいほど望ましいが、表面凹凸を形成できるだけのサイズがあることとのトレード・オフから、平均径が約φ1.0μmのフィラを採用した(以下、「フィラ1」という。)。   Further, from the condition of “(D) reducing the diameter of the filler”, the smaller the diameter, the better. However, from the trade-off with the size that can form the surface unevenness, the filler having an average diameter of about φ1.0 μm. (Hereinafter referred to as “Fila 1”).

・(第2層塗工)
塗工液2に対し、フィラ1を0.22wt%分散した液を用いて、仮焼成までした第1層の上に、第2層(AG層)をWet膜厚1.6μmで重ね塗りをする。膜厚は、フィラ1で表面凹凸を形成出来、また沸点の高い溶媒(エクソールD130、沸点302℃)による焼成ムラが発生しないことを条件として最適化を行なった。塗工後、IR焼成炉にて180℃、195秒の条件で仮焼成を行う。
・ (Second layer coating)
The second layer (AG layer) is overcoated with a wet film thickness of 1.6 μm on the first layer that has been pre-fired using a liquid in which 0.21 wt% of filler 1 is dispersed in the coating liquid 2. To do. The film thickness was optimized on the condition that surface unevenness can be formed with the filler 1 and firing unevenness due to a solvent having a high boiling point (Exsol D130, boiling point 302 ° C.) does not occur. After coating, provisional firing is performed in an IR firing furnace at 180 ° C. for 195 seconds.

以下に、上記の本実施例のベース層及びAG層の積層条件を、それぞれ初期条件及び改善条件として表1に示す。   Hereinafter, the lamination conditions of the base layer and the AG layer of the present embodiment are shown in Table 1 as initial conditions and improvement conditions, respectively.

Figure 2007004339
Figure 2007004339

・(保護コートの焼成)
2重構成で塗工、仮焼成まで行った基材を、熱風循環式BOXオーブンに入れ、300℃以上の状態を1時間以上保つ条件で焼成を行うことで、ゾルゲル液をシリカ転化し、無機材質のAG保護膜(AG層)を形成した。
・ (Firing protective coating)
The base material, which has been coated and pre-baked in a double structure, is placed in a hot-air circulating BOX oven and baked under the condition of maintaining a temperature of 300 ° C. or higher for 1 hour or longer. A material AG protective film (AG layer) was formed.

その後、通常の公知のタッチパネル製造工程を経て、本発明に係るタッチパネルセンサ10を製造した。   Then, the touch panel sensor 10 which concerns on this invention was manufactured through the normal well-known touch panel manufacturing process.

・(実施結果)
保護コートがAG層とベース層の2重塗り構成の本実施例のタッチパネルセンサは、以下のヘイズ値と耐久性を得た。AG層とベース層の構成は表2に示す。
・ (Implementation results)
The touch panel sensor of the present example in which the protective coat has a double coating structure of the AG layer and the base layer obtained the following haze value and durability. Table 2 shows the configurations of the AG layer and the base layer.

また、本実施例で耐久性の測定は次のように行なった。即ち、保護コートを塗工した導電膜ガラスを100mm角にカットし、対向する2辺に5mm幅程度の電極を設けて摺動時の抵抗変化を測定した。摺動はシリコンゴム(先端は半径3mmの半円球)に500g荷重して30mm摺動し、上記抵抗値が2%上がったところで摺動耐久性の限界回数とした。
(ヘイズ) 4.0%
(耐久性) シリコンゴム摺動耐久性:12万回以上
Further, in this example, the durability was measured as follows. That is, the conductive film coated with the protective coat was cut into a 100 mm square, and electrodes having a width of about 5 mm were provided on the two opposing sides, and the resistance change during sliding was measured. The sliding was performed by applying a load of 500 g to silicon rubber (tip is a semicircle with a radius of 3 mm) and sliding 30 mm. When the resistance value increased by 2%, the sliding durability was determined as the limit number of times.
(Haze) 4.0%
(Durability) Silicon rubber sliding durability: 120,000 times or more

尚、本実施例において製造した保護コートの上記摺動耐久性は、従来の一層の保護コートの1.5倍以上であった(当社比)。   The sliding durability of the protective coat produced in this example was 1.5 times or more that of the conventional single protective coat (compared to our company).

Figure 2007004339
Figure 2007004339

次に、上記実施例1におけるフィラ濃度を変えた場合の、保護コートのヘイズ値の変化を測定し、図2を得た。図2よりフィラ濃度とヘイズ値には、少なくともフィラ濃度の薄い範囲で比例関係があることがわかる。   Next, the change in the haze value of the protective coat when the filler concentration in Example 1 was changed was measured, and FIG. 2 was obtained. FIG. 2 shows that there is a proportional relationship between the filler density and the haze value at least in a range where the filler density is low.

使用上、表示装置の画像を透過してみることも考慮に入れた場合、好適なヘイズ値は2〜7%程度であることから、実施例1の製造条件においては、フィラ濃度は0.1%〜0.4%が好ましいことがわかる。   In consideration of the fact that it is possible to see through the image of the display device in use, the preferred haze value is about 2 to 7%. Therefore, under the manufacturing conditions of Example 1, the filler concentration is 0.1. It can be seen that% to 0.4% is preferable.

以上、本発明の防眩性保護コート及びタッチパネルセンサについて説明したが、本発明は上記実施例に限定されるものではない。例えば、本発明の保護コートの原材料やフィラ濃度を変化させることにより、上記のようにヘイズ値を変化させることができる。即ち、本発明の防眩性保護コートは、保護コートの材料やフィラの濃度や径を変更する事で外観を広い範囲で調整することが可能である。   The antiglare protective coat and touch panel sensor of the present invention have been described above, but the present invention is not limited to the above-described embodiments. For example, the haze value can be changed as described above by changing the raw material or filler concentration of the protective coat of the present invention. That is, the antiglare protective coat of the present invention can be adjusted in appearance over a wide range by changing the material of the protective coat and the concentration and diameter of the filler.

従って、本発明の防眩保護コートは、アナログ方式静電容量タッチパネルに特に有用であるが、静電容量方式あるいはアナログ方式のタッチパネルに限定されるわけではない。マトリックス方式のタッチパネルや、抵抗膜方式等他方式のタッチパネルに用いられてもよく、その他の種々のディスプレイを始めとしたパネルにも使用され得る。   Accordingly, the antiglare protective coat of the present invention is particularly useful for an analog capacitive touch panel, but is not limited to a capacitive or analog touch panel. It may be used for other types of touch panels such as a matrix type touch panel and a resistive film type, and may also be used for panels including other various displays.

また、本発明の防眩保護コートの製法は上記実施例に限定されるものではないが、上記製法であってもLR(LowReflection)膜など光学基材を枚葉コートで低コストで製造可能であり、化学的処理を行なわないので環境影響の低減を招くこともない。従って、本発明の防眩保護コートは保護機能、防眩性等を目的とするだけではなく、上記その他の目的を有する基材等にも使用され得る。尚、当業者の常識の範囲で本発明の防眩保護コートを製造し得るすべての方法が本発明に係る防眩保護コートの製法に含まれ得る。   In addition, although the production method of the antiglare protective coat of the present invention is not limited to the above-described embodiment, an optical substrate such as an LR (Low Reflection) film can be produced with a single wafer coat at a low cost even with the above production method. In addition, since no chemical treatment is performed, the environmental impact is not reduced. Therefore, the antiglare protective coat of the present invention can be used not only for a protective function and antiglare property but also for a substrate having the above-mentioned other purposes. In addition, all the methods which can manufacture the anti-glare protective coat of this invention in the range of common knowledge of those skilled in the art can be included in the manufacturing method of the anti-glare protective coat concerning this invention.

更に、上記実施例において、防眩保護コートの原材料のゾルゲル液としてポリシラザンを用いたが、特にこれに限定されるものではない。その他のゾルゲル液を用いてもよい。また、ベース層とAG層で異なる種類のゾルゲル液を用いてもよい。   Furthermore, in the said Example, although the polysilazane was used as a sol-gel liquid of the raw material of a glare-proof protective coat, it is not specifically limited to this. Other sol-gel solutions may be used. Different types of sol-gel solutions may be used for the base layer and the AG layer.

更に、上記実施例では、平均径が約φ1.0のシリカフィラを用いたが、フィラの径はφ0.5〜φ1.5μmの範囲であれば、好適に用いられる。フィラの形状は球状に限ることは無く、又、フィラの原材料も上記シリカに限定されず、他の種類のフィラを用いてもよい。また、フィラの濃度は上記実施例2で得られた0.1%〜0.4%に特に限定されず、ゾルゲル液の原材料、フィラの濃度・径、所望のヘイズ値等により、適宜調整される。   Furthermore, in the said Example, although the silica filler whose average diameter is about (phi) 1.0 was used, if the diameter of a filler is the range of (phi) 0.5-phi1.5micrometer, it will be used suitably. The shape of the filler is not limited to a spherical shape, and the raw material of the filler is not limited to the silica, and other types of fillers may be used. Further, the concentration of filler is not particularly limited to 0.1% to 0.4% obtained in Example 2, and is appropriately adjusted depending on the raw material of the sol-gel solution, the concentration / diameter of the filler, the desired haze value, and the like. The

その他、本発明は、その主旨を逸脱しない範囲で当業者の知識に基づき種々の改良、修正、変更を加えた態様で実施できるものである。
In addition, the present invention can be implemented with various improvements, modifications, and changes based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

本発明は、アナログ方式静電容量タッチパネルに特に有用であるが、広くはあらゆるパネルに対して利用可能である。
The present invention is particularly useful for an analog capacitive touch panel, but is widely applicable to any panel.

本発明に係るタッチパネルセンサの断面図。Sectional drawing of the touch-panel sensor which concerns on this invention. 本発明の防眩保護コートが含むフィラ濃度とヘイズ値の関係を表すグラフ。The graph showing the relationship between the filler density | concentration and the haze value which the glare-proof protective coat of this invention contains. 従来の静電容量方式のアナログ方式タッチパネルセンサの断面図。Sectional drawing of the conventional capacitive type analog type touch panel sensor. 従来の静電容量方式のマトリックス方式(デジタル方式)タッチパネルセンサの断面図。Sectional drawing of the conventional capacitance type matrix type (digital type) touch panel sensor. 従来の表面保護コートと保護コートの断面図。Sectional drawing of the conventional surface protective coat and protective coat.

符号の説明Explanation of symbols

1:防眩保護コート
2:AG層
3:ベース層
5、15:フィラ
10、110:タッチパネルセンサ
14:表面導電膜
16:裏面導電膜
20:検出用電極
22:シールド用電極
100:ガラス基板
112:保護コート
1: Antiglare protective coat 2: AG layer 3: Base layer 5, 15: Filler 10, 110: Touch panel sensor 14: Front conductive film 16: Back conductive film 20: Detection electrode 22: Shielding electrode 100: Glass substrate 112 : Protective coat

Claims (6)

パネル用基材の表面に導電膜を成膜したタッチパネルの、該導電膜を保護する保護コートであって、
前記導電膜の上に積層したベース層と、
前記ベース層の上に積層し、フィラを混入したAG(Anti Glare:防眩性)層と、
を含む防眩性保護コート。
It is a protective coat for protecting the conductive film of the touch panel in which the conductive film is formed on the surface of the panel substrate,
A base layer laminated on the conductive film;
An AG (Anti Glare) layer laminated on the base layer and mixed with filler,
Anti-glare protective coat containing
前記フィラは、径がφ0.5μm乃至φ1.5μmのシリカフィラである請求項1に記載の防眩性保護コート。 2. The antiglare protective coat according to claim 1, wherein the filler is a silica filler having a diameter of φ0.5 μm to φ1.5 μm. 前記AG層は、フィラを混入したゾルゲル液を塗工して積層した請求項1または請求項2に記載の防眩性保護コート。 The anti-glare protective coat according to claim 1 or 2, wherein the AG layer is formed by applying and laminating a sol-gel solution mixed with filler. 前記ゾルゲル液は、ポリシラザンである請求項3に記載の防眩性保護コート。 The anti-glare protective coat according to claim 3, wherein the sol-gel solution is polysilazane. パネル用基材と
前記パネル用基材の表面に成膜した導電膜と、
前記導電膜の上に積層したベース層と、
前記ベース層の上に積層し、フィラを混入したAG層と、
を含むタッチパネルセンサ。
A substrate for a panel and a conductive film formed on the surface of the panel substrate;
A base layer laminated on the conductive film;
An AG layer laminated on the base layer and mixed with filler,
Touch panel sensor including
パネル用基材を準備するステップと
前記パネル用基材の表面に導電膜を成膜するステップと、
前記導電膜の上にベース層を塗工するステップと、
フィラを混入したAG層を前記ベース層の上に塗工するステップと、
を含むタッチパネルセンサの製造方法。

Preparing a substrate for a panel, forming a conductive film on a surface of the panel substrate, and
Applying a base layer on the conductive film;
Coating the AG layer mixed with filler on the base layer;
A method for manufacturing a touch panel sensor including:

JP2005181672A 2005-06-22 2005-06-22 Antiglare protection coat and touch panel sensor including the same Pending JP2007004339A (en)

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JP2011096234A (en) * 2009-09-29 2011-05-12 Kyocera Corp Input device and display apparatus including the same
JP2011192150A (en) * 2010-03-16 2011-09-29 Dainippon Printing Co Ltd Substrate for touch panel, touch panel, and method for manufacturing substrate for touch panel
WO2012086531A1 (en) * 2010-12-24 2012-06-28 シャープ株式会社 Touch panel and display device provided with said touch panel
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CN108264842A (en) * 2016-12-30 2018-07-10 株式会社东进世美肯 Anti-glare coating composition and anti-glare substrate comprising same
WO2020073154A1 (en) * 2018-10-08 2020-04-16 李庆远 Flexible pointing device

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JP2011096234A (en) * 2009-09-29 2011-05-12 Kyocera Corp Input device and display apparatus including the same
JP2011192150A (en) * 2010-03-16 2011-09-29 Dainippon Printing Co Ltd Substrate for touch panel, touch panel, and method for manufacturing substrate for touch panel
WO2012086531A1 (en) * 2010-12-24 2012-06-28 シャープ株式会社 Touch panel and display device provided with said touch panel
WO2015002042A1 (en) * 2013-07-05 2015-01-08 株式会社カネカ Anti-glare film for solar cell module, solar cell module provided with anti-glare film, and method for manufacturing same
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WO2020073154A1 (en) * 2018-10-08 2020-04-16 李庆远 Flexible pointing device

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