WO2005098585A1 - Transparent touch switch - Google Patents

Transparent touch switch Download PDF

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Publication number
WO2005098585A1
WO2005098585A1 PCT/JP2005/006902 JP2005006902W WO2005098585A1 WO 2005098585 A1 WO2005098585 A1 WO 2005098585A1 JP 2005006902 W JP2005006902 W JP 2005006902W WO 2005098585 A1 WO2005098585 A1 WO 2005098585A1
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WO
WIPO (PCT)
Prior art keywords
transparent
touch switch
transparent conductive
conductive films
transparent touch
Prior art date
Application number
PCT/JP2005/006902
Other languages
French (fr)
Japanese (ja)
Inventor
Keiji Tsukamoto
Seiichi Murakami
Original Assignee
Gunze Limited
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Filing date
Publication date
Application filed by Gunze Limited filed Critical Gunze Limited
Publication of WO2005098585A1 publication Critical patent/WO2005098585A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03547—Touch pads, in which fingers can move on a surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties

Definitions

  • the present invention relates to a transparent touch switch, and more particularly, to a capacitance-type transparent touch switch.
  • the transparent touch switch disclosed in Patent Document 1 has a structure in which a dielectric layer is interposed between a pair of transparent conductive films having a predetermined pattern shape. It is possible to detect the touch position by using the change in capacitance caused by grounding through the touch panel.
  • Patent Document 1 Japanese Patent Laid-Open No. 2003-173238 (FIGS. 1 and 5)
  • an object of the present invention is to provide a transparent touch switch capable of improving visibility.
  • the object of the present invention is to provide a pair of transparent substrates on each of which a transparent conductive film is patterned and adhered to each other via an adhesive layer, and capable of detecting a contact position of one of the transparent substrates on a front surface side.
  • a transparent touch switch of a capacitance type wherein each of the transparent substrates is made of a norbornene-based resin, and each of the transparent conductive films is formed via an undercoat layer.
  • the coat layer is achieved by a transparent touch switch formed by laminating two or more layers having different light refractive indexes so that the light transmittance is higher than that of the transparent substrate before the formation of the undercoat layer.
  • a circularly polarizing plate is provided on the surface side of one of the transparent substrates. Further, it is more preferable that a ⁇ 4 retardation plate is provided on the back side of the other transparent substrate!
  • FIG. 1 is a schematic sectional view of a transparent touch switch according to one embodiment of the present invention.
  • FIG. 2 is a plan view showing a main part of the transparent touch switch shown in FIG. 1.
  • FIG. 3 is a plan view showing another main part of the transparent touch switch shown in FIG. 1.
  • FIG. 4 is a schematic sectional view of a transparent touch switch according to another embodiment of the present invention.
  • FIG. 5 is a schematic sectional view of a transparent touch switch according to still another embodiment of the present invention.
  • FIG. 6 is a schematic sectional view of a transparent touch switch according to still another embodiment of the present invention.
  • FIG. 7 is a schematic sectional view of a transparent touch switch according to still another embodiment of the present invention. Explanation of symbols
  • FIG. 1 is a schematic sectional view of a transparent touch switch according to one embodiment of the present invention.
  • the transparent touch switch 101 is a capacitive touch switch, and includes a first planar body 1 in which a transparent conductive film 12 is formed on a transparent substrate 11 via an undercoat layer 13 and a transparent substrate 21.
  • the first planar body 1 and the second planar body 2 are bonded via the adhesive layer 15 such that the transparent conductive films 12 and 22 face each other.
  • a circular polarizer 6 composed of a linear polarizer 4 and a ⁇ , 4 retardation plate 5 is provided on the surface side of the first planar body 1 on the touch side (the side opposite to the surface on which the transparent conductive film 12 is formed). Is attached via an adhesive layer 9.
  • the transparent substrates 11 and 21 are preferably materials having high transparency and optical isotropy, and preferably include norbornene-based resins.
  • the transparent substrates 11 and 21 may be subjected to hard coat processing on one or both sides.
  • the thickness of the transparent substrates 11 and 21 is preferably about 20 to 500 ⁇ m! / ⁇ .
  • the undercoat layers 13 and 23 By forming the undercoat layers 13 and 23 on the transparent substrates 11 and 21, respectively, the light refraction index is increased so that the light transmittance is higher than that of the transparent substrates 11 and 21 before the undercoat layer is formed.
  • the laminate is composed of two or more different layers. Examples of the material of each layer constituting the laminated body of the undercoat layers 13 and 23 include silicon oxide, titanium oxide, and tin oxide. Preferred combinations include hafnium oxide of tin oxide and monoxide of silicon oxide. Examples include tin-based, zinc oxide-tin oxide-based, and oxidized tin-oxidized titanium-based.
  • the undercoat layers 13 and 23 can be formed by a sputtering method, a resistance evaporation method, an electron beam evaporation method, or the like.
  • Materials for the transparent conductive films 12, 22 include indium tin oxide (ITO), indium oxide, antimony-added oxidized tin, fluorine-added oxidized tin, aluminum-added oxidized zinc, and potassium-added oxidized oxide.
  • ITO indium tin oxide
  • Zinc, silicon-added zinc oxide, metal oxides such as zinc oxide tin monoxide, indium oxide tin oxide, zinc oxide, indium oxide and magnesium oxide can be exemplified. It may be formed as a composite.
  • Examples of a method for forming the transparent conductive films 12 and 22 include a PVD method such as a sputtering method, a vacuum evaporation method, and an ion plating method, a CVD method, a coating method, and a printing method.
  • the transparent conductive films 12 and 22 are each formed as an aggregate of a plurality of strip-shaped conductive portions 12a and 22a extending in parallel.
  • the strip-shaped conductive portions 12a and 22a are arranged to be orthogonal to each other.
  • the transparent conductive films 12 and 22 are connected to an external drive circuit (not shown) through a drawing circuit (not shown) that also has a strong force such as conductive ink. Not connected).
  • the shape of the turn of the transparent conductive films 12 and 22 is not limited to that of the present embodiment, but may be any shape as long as a contact point such as a finger can be detected.
  • a touch position detection method is the same as that of a conventional capacitive touch panel.
  • the transparent conductive films 12 and 22 become in contact with each other.
  • the coordinates of the contact position are calculated by detecting the value of the current flowing through the transparent conductive films 12 and 22 at this time through the capacitance of the human body at the contact position.
  • the pattern of the transparent conductive films 12 and 22 has a desired pattern shape on the surfaces of the transparent conductive films 12 and 22 formed on the transparent substrates 11 and 21 via the undercoat layers 13 and 23, respectively.
  • the mask portion can be dissolved with an alkali solution or the like to perform the process.
  • unnecessary transparent conductive films 12 and 22 can be removed, while the undercoat layers 13 and 23 can all remain.
  • the patterning of the transparent conductive films 12 and 22 is not limited to such a method.
  • the patterning of the transparent conductive films 12 and 22 may be performed by removing the undercoat layers 13 and 23 or by patterning using another known method. Good
  • the adhesive layer 15 can use a general transparent adhesive such as an epoxy-based or acrylic-based adhesive, and may include a core material that is a transparent film of a norbornene-based resin.
  • the circularly polarizing plate 6 is formed by adhering the entire surface of the linearly polarizing plate 4 and the ⁇ 4 retardation plate 5.
  • the linear polarizing plate 4 can be, for example, a stretched film of polyvinyl alcohol (PVA) in which a dichroic dye such as iodine or a dichroic dye is adsorbed and oriented. It may be used so as to be sandwiched between cetyl acetate (TAC) films.
  • the ⁇ 4 retardation plate 5 may be, for example, a film obtained by stretching a polybutyl alcohol ( ⁇ VA) or polycarbonate (PC) film to impart birefringence. Adhesion between the circularly polarizing plate 6 and the first planar body 1 is also performed through the adhesive layer 9 having the same material strength as that of the adhesive layer 15 so that no air layer is interposed therebetween. Is preferred.
  • a norbornene-based resin is selected as a material for the transparent substrates 11 and 21, and the transparent conductive films 12 and 22 are formed via the undercoat layers 13 and 23. Therefore, as shown in the experimental results described later, the patterns of the transparent conductive films 12 and 22 can be noticeable, and the visibility can be improved. Further, when the circularly polarizing plate 6 is provided on the surface side of the transparent substrate 11, the visibility can be further improved.
  • a ⁇ 4 retardation plate 8 is adhered to the entire back surface of the second planar body 2 via an adhesive layer 16 made of the same material as the adhesive layer 15, whereby The transparent touch switch 102 shown in FIG. 4 may be configured, so that the visibility can be further improved.
  • the ⁇ 4 retardation plate 8 is arranged so that the optical axis is orthogonal to the optical axis of the ⁇ 4 retardation plate 5.
  • FIG. 2 the same components as those in FIG. 1 are denoted by the same reference numerals (the same applies to the following drawings).
  • a ⁇ / 4 retardation plate made of norbornene-based resin is used as the transparent substrate 31, and the ⁇ / 4 retardation plate is used.
  • the transparent touch switch 103 may be configured such that the transparent conductive film 12 is formed via the undercoat layer 13. In this case, only the linear polarizing plate 4 should be formed on the touch side (front side) of the transparent substrate 31 via the adhesive layer 9.
  • a ⁇ / 4 retardation plate made of norbornene-based resin is used as the transparent substrate 41, and this ⁇ / 4 retardation plate is used.
  • the transparent touch switch 104 may be configured such that the transparent conductive film 22 is formed via the undercoat layer 23. Further, the transparent substrate 41 described above is used instead of the transparent substrate 21 shown in FIG.
  • the transparent conductive films 12 and 22 need not necessarily be arranged to face each other.
  • the other side is the transparent conductive film on the transparent substrate 21 via the adhesive layer 15. It may be configured to be attached to the formation surface of the 22.
  • the transparent touch panel having the configuration shown in FIG. 4 was produced.
  • the size is 5cm long and 7cm wide.
  • the transparent substrate 11 of the first planar body 1 was made of “Zeonor” made by Nippon Zeon Co., Ltd., which is an optically isotropic film of norbornene resin, and had a thickness of 188 m.
  • the undercoat layer 13 is a laminate in which a silicon oxide layer having a thickness of about 30 nm and a silicon tin oxide layer having a thickness of about 70 nm are laminated in this order, and the transparent conductive film 12 has a thickness of 30 nm indium stannate.
  • a film layer was formed by sputtering.
  • the surface resistivity was about 250 ⁇ / mouth.
  • the material and thickness of the transparent substrate 21, the undercoat layer 23, and the transparent conductive film 22 of the second planar body 2 are the same as those of the transparent substrate 11, the undercoat layer 13, and the transparent conductive film 12 of the first plan
  • the shape of the transparent conductive films 12 and 22 is a strip as shown in Figs. 2 and 3, and the width of each of the conductive strips 12a and 22a is 0.3 mm and the interval is 4. Omm. And The formation of the turns of the transparent conductive films 12 and 22 was performed by etching as described in the present embodiment.
  • the circular polarizer 6 is a circular polarizer with a single-sided adhesive for a touch panel manufactured by Sumitomo Chemical Co., Ltd., which has a thickness of 0.45 mm and an assumed wavelength of 550 nm.
  • a PET film, a linear polarizing plate and a ⁇ ⁇ 4 plate were laminated, and a PET film: PET-AG7AR and a linear polarizing plate: SQW252AW0) were used.
  • the ⁇ 4 retardation plate 8 used was a ⁇ 4 plate (product number: AGU- (U-S, model number: WH157)) manufactured by Sumitomo Iridaku Kogyo Co., Ltd. Used acrylic adhesive "P043FP" manufactured by Lintec Co., Ltd.
  • the touch side (front side) of the transparent touch switch manufactured in this manner is irradiated with a 24 W three-wavelength fluorescent lamp, and the force at which the pattern shape of the transparent conductive films 12 and 22 can be visually recognized while changing the irradiation angle. was visually inspected.
  • the spectral reflectance (wavelength 550 nm) and the total light transmittance of this transparent touch panel were measured in accordance with JI SK7361-1, and the portion where each transparent conductive film 12 and 22 overlapped and the transmittance were measured.
  • the difference value which is the difference between the measured values of the bright conductive films 12 and 22 where no misalignment was formed, was determined.
  • a spectrophotometer (U-3310) manufactured by Hitachi, Ltd. was used to measure the spectral reflectance, and a digital turbidimeter (NDH5000W, Nippon Denshoku Industries Co., Ltd.) was used to measure the total light transmittance. ) was used. The results are shown in Table 1 as Example 1.
  • Example 1 The visual results of Example 1 showed that the pattern shapes of the transparent conductive films 12 and 22 were inconspicuous including the portions where the transparent conductive films 12 and 22 overlapped, and good visibility was obtained. The difference between the spectral reflectance and the total light transmittance was a small value.
  • Example 2 The visual result of Example 2 was such that good visibility was obtained as in Example 1.
  • Example 3 is a result that, when carefully checked, the pattern shape of the transparent conductive films 12 and 22 can be recognized, and the difference between the spectral reflectance and the total light transmittance is smaller than that of Examples 1 and 2. In each case, the values were slightly higher.
  • the material of the transparent substrates 11 and 21 was changed to “Zeonor” manufactured by Zeon Corporation and replaced by “ARTON” manufactured by JSR Corporation, which is the same norbornene-based resin optically isotropic film. (Thickness: 188 ⁇ m) and the same test as above was performed under the same conditions as in Examples 1 to 3, except that hard coat processing was performed on both 20,000 of this film. The results are shown in Table 1 as Examples 4 to 6.
  • Example 4 The visual results of Examples 4 and 5 were such that good visibility was obtained as in Example 1. Further, the difference between the spectral reflectance and the total light transmittance was a small value.
  • the visual result of Example 6 is a result that the pattern shape of the transparent conductive films 12 and 22 can be recognized when carefully checked, and the difference between the spectral reflectance and the total light transmittance is smaller than that of Examples 4 and 5. In each case, the values were slightly higher.
  • Comparative Examples 1 to 3 all showed that the pattern shapes of the transparent conductive films 12 and 22 were clearly recognizable, resulting in poor visibility.
  • the difference between the spectral reflectance and the total light transmittance was higher than those in Examples 1 to 3.
  • Comparative Examples 4 to 6 were all such that the pattern shapes of the transparent conductive films 12 and 22 could be clearly recognized, resulting in poor visibility.
  • the difference between the spectral reflectance and the total light transmittance was higher than those in Examples 1 to 3.
  • the transparent touch switch of an electrostatic capacitance type which can improve visibility can be provided.

Abstract

A capacitive transparent touch switch comprising a pair of transparent substrates (11, 21) on which transparent conductive films (12, 22) are patterned, respectively, and which are adhered to each other through an adhesive layer (15), and capable of detecting a contact position on the surface side of the transparent substrates (11). Each of the transparent substrates (11, 21) is composed of norbornane-based resin and each of the transparent conductive films (12, 22) is formed with an undercoat (13, 23) in between. The undercoat layers (13, 23) are formed by layering two or more layers having different light refractive indices such that the light transmittance becomes higher than that of the transparent substrates (11, 21) before the undercoat layers (11, 21) are formed. The structure above can enhance the visibility of the transparent touch switch.

Description

明 細 書  Specification
透明タツチスィッチ  Transparent touch switch
技術分野  Technical field
[0001] 本発明は、透明タツチスィッチに関し、より詳しくは、静電容量式の透明タツチスイツ チに関する。  The present invention relates to a transparent touch switch, and more particularly, to a capacitance-type transparent touch switch.
背景技術  Background art
[0002] 入力位置を検出するための透明タツチスィッチの構成は、従来力 種々検討されて いるが、一例として静電容量式の透明タツチスィッチが知られている。例えば、特許 文献 1に開示された透明タツチスィッチは、所定のパターン形状を有する一対の透明 導電膜の間に誘電体層が介在されて構成されており、指などが操作面に触れると、 人体を介して接地されることによる静電容量の変化を利用して、タツチ位置を検出す ることがでさる。  [0002] Conventionally, various configurations of a transparent touch switch for detecting an input position have been studied, and as an example, a transparent touch switch of a capacitance type is known. For example, the transparent touch switch disclosed in Patent Document 1 has a structure in which a dielectric layer is interposed between a pair of transparent conductive films having a predetermined pattern shape. It is possible to detect the touch position by using the change in capacitance caused by grounding through the touch panel.
[0003] この透明タツチパネルは、液晶表示装置や CRTなどの表面に装着して用いられる 力 透明導電膜のパターン形状が目立ってしまい、視認性の低下を招いていた。 特許文献 1 :特開 2003— 173238号公報（図 1、図 5)  [0003] In this transparent touch panel, the pattern shape of a transparent conductive film used by being mounted on a surface of a liquid crystal display device, a CRT, or the like is conspicuous, which causes a reduction in visibility. Patent Document 1: Japanese Patent Laid-Open No. 2003-173238 (FIGS. 1 and 5)
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0004] そこで、本発明は、視認性を向上させることができる透明タツチスィッチの提供を目 的とする。 [0004] Therefore, an object of the present invention is to provide a transparent touch switch capable of improving visibility.
課題を解決するための手段  Means for solving the problem
[0005] 本発明の前記目的は、透明導電膜がそれぞれパターユングされ、粘着層を介して 互いに貼着される一対の透明基板を備え、一方の前記透明基板における表面側の 接触位置を検出可能な静電容量式の透明タツチスィッチであって、前記各透明基板 は、いずれもノルボルネン系榭脂から構成され、前記各透明導電膜は、いずれもアン ダーコート層を介して形成されており、前記アンダーコート層は、該アンダーコート層 形成前の前記透明基板よりも光透過率が高くなるように、光屈折率が異なる 2以上の 層を積層して構成されている透明タツチスィッチにより達成される。 [0006] この透明タツチスィッチは、一方の前記透明基板の表面側に、円偏光板が設けられ ていることが好ましい。また、他方の前記透明基板の裏面側に、 λ Ζ4位相差板が設 けられて 、ることがより好まし!/、。 [0005] The object of the present invention is to provide a pair of transparent substrates on each of which a transparent conductive film is patterned and adhered to each other via an adhesive layer, and capable of detecting a contact position of one of the transparent substrates on a front surface side. A transparent touch switch of a capacitance type, wherein each of the transparent substrates is made of a norbornene-based resin, and each of the transparent conductive films is formed via an undercoat layer. The coat layer is achieved by a transparent touch switch formed by laminating two or more layers having different light refractive indexes so that the light transmittance is higher than that of the transparent substrate before the formation of the undercoat layer. [0006] In the transparent touch switch, it is preferable that a circularly polarizing plate is provided on the surface side of one of the transparent substrates. Further, it is more preferable that a λΖ4 retardation plate is provided on the back side of the other transparent substrate!
図面の簡単な説明  Brief Description of Drawings
[0007] [図 1]本発明の一実施形態に係る透明タツチスィッチの概略断面図である。 FIG. 1 is a schematic sectional view of a transparent touch switch according to one embodiment of the present invention.
[図 2]図 1に示す透明タツチスィッチの要部を示す平面図である。  FIG. 2 is a plan view showing a main part of the transparent touch switch shown in FIG. 1.
[図 3]図 1に示す透明タツチスィッチの他の要部を示す平面図である。  FIG. 3 is a plan view showing another main part of the transparent touch switch shown in FIG. 1.
[図 4]本発明の他の実施形態に係る透明タツチスィッチの概略断面図である。  FIG. 4 is a schematic sectional view of a transparent touch switch according to another embodiment of the present invention.
[図 5]本発明の更に他の実施形態に係る透明タツチスィッチの概略断面図である。  FIG. 5 is a schematic sectional view of a transparent touch switch according to still another embodiment of the present invention.
[図 6]本発明の更に他の実施形態に係る透明タツチスィッチの概略断面図である。  FIG. 6 is a schematic sectional view of a transparent touch switch according to still another embodiment of the present invention.
[図 7]本発明の更に他の実施形態に係る透明タツチスィッチの概略断面図である。 符号の説明  FIG. 7 is a schematic sectional view of a transparent touch switch according to still another embodiment of the present invention. Explanation of symbols
[0008] 1 第 1面状体 [0008] 1st planar body
2 第 2面状体  2 Second planar body
11, 21 透明基板  11, 21 Transparent substrate
12, 22 透明導電膜  12, 22 transparent conductive film
13, 23 アンダーコート層  13, 23 Undercoat layer
4 直線偏光板  4 Linear polarizing plate
5 λ , 4位相差板  5 λ, 4 phase difference plate
6 円偏光板  6 Circular polarizer
8 λ , 4位相差板  8 λ, 4 phase difference plate
9, 15, 16 粘着層  9, 15, 16 Adhesive layer
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0009] 以下、本発明の実態形態について添付図面を参照して説明する。尚、各図面は、 構成の理解を容易にするため、実寸比ではなく部分的に拡大又は縮小されている。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, each drawing is partially enlarged or reduced instead of the actual size ratio for easy understanding of the configuration.
[0010] 図 1は、本発明の一実施形態に係る透明タツチスィッチの概略断面図である。この 透明タツチスィッチ 101は、静電容量式のタツチスィッチであり、透明基板 11にアン ダーコート層 13を介して透明導電膜 12が形成された第 1面状体 1と、透明基板 21に アンダーコート層 23を介して透明導電膜 22が形成された第 2面状体 2とを備えてい る。第 1面状体 1と第 2面状体 2とは、それぞれの透明導電膜 12, 22が対向するよう にして、粘着層 15を介して貼着されている。タツチ側となる第 1面状体 1の表面側 (透 明導電膜 12が形成された面と反対側）には、直線偏光板 4と λ ,4位相差板 5とから なる円偏光板 6が、粘着層 9を介して貼着されている。 FIG. 1 is a schematic sectional view of a transparent touch switch according to one embodiment of the present invention. The transparent touch switch 101 is a capacitive touch switch, and includes a first planar body 1 in which a transparent conductive film 12 is formed on a transparent substrate 11 via an undercoat layer 13 and a transparent substrate 21. A second planar body 2 on which a transparent conductive film 22 is formed via an undercoat layer 23. The first planar body 1 and the second planar body 2 are bonded via the adhesive layer 15 such that the transparent conductive films 12 and 22 face each other. On the surface side of the first planar body 1 on the touch side (the side opposite to the surface on which the transparent conductive film 12 is formed), a circular polarizer 6 composed of a linear polarizer 4 and a λ, 4 retardation plate 5 is provided. Is attached via an adhesive layer 9.
[0011] 透明基板 11, 21は、透明性が高ぐ且つ、光等方性を有することが好ましぐ材料 としてはノルボルネン系榭脂を好ましく例示することができる。透明基板 11, 21は、 片面又は両面にハードコート加工を施してもよい。また、透明基板 11, 21の厚みは、 20〜500 μ m程度力好まし!/ヽ。  The transparent substrates 11 and 21 are preferably materials having high transparency and optical isotropy, and preferably include norbornene-based resins. The transparent substrates 11 and 21 may be subjected to hard coat processing on one or both sides. The thickness of the transparent substrates 11 and 21 is preferably about 20 to 500 μm! / ヽ.
[0012] アンダーコート層 13, 23は、それぞれ透明基板 11, 21に形成することによって、ァ ンダーコート層形成前の透明基板 11, 21よりも光透過率が高くなるように、光屈折率 が異なる 2以上の層の積層体力ゝら構成されている。アンダーコート層 13, 23の積層 体を構成する各層の材料としては、酸化珪素、酸化チタン、酸化錫などを例示するこ とができ、好ましい組み合わせとして、酸化錫一酸化ハフニウム系、酸化珪素一酸化 錫系、酸化亜鉛一酸化錫系、酸ィ匕錫一酸ィ匕チタン系などを挙げることができる。この アンダーコート層 13, 23は、スパッタリング法、抵抗蒸着法、電子ビーム蒸着法など により形成することができる。  [0012] By forming the undercoat layers 13 and 23 on the transparent substrates 11 and 21, respectively, the light refraction index is increased so that the light transmittance is higher than that of the transparent substrates 11 and 21 before the undercoat layer is formed. The laminate is composed of two or more different layers. Examples of the material of each layer constituting the laminated body of the undercoat layers 13 and 23 include silicon oxide, titanium oxide, and tin oxide. Preferred combinations include hafnium oxide of tin oxide and monoxide of silicon oxide. Examples include tin-based, zinc oxide-tin oxide-based, and oxidized tin-oxidized titanium-based. The undercoat layers 13 and 23 can be formed by a sputtering method, a resistance evaporation method, an electron beam evaporation method, or the like.
[0013] 透明導電膜 12, 22の材料としては、インジウム錫酸化物 (ITO)、酸化インジウム、 アンチモン添加酸ィ匕錫、フッ素添加酸ィ匕錫、アルミニウム添加酸ィ匕亜鉛、カリウム添 加酸化亜鉛、シリコン添加酸化亜鉛や、酸化亜鉛一酸化錫系、酸化インジウム 酸 化錫系、酸化亜鉛 酸化インジウム 酸ィ匕マグネシウム系などの金属酸ィ匕物を例示 することができ、これら 2種以上を複合して形成してもよい。透明導電膜 12, 22の形 成方法は、スパッタリング法、真空蒸着法、イオンプレーティング法などの PVD法や、 CVD法、塗工法、印刷法などを例示することができる。  [0013] Materials for the transparent conductive films 12, 22 include indium tin oxide (ITO), indium oxide, antimony-added oxidized tin, fluorine-added oxidized tin, aluminum-added oxidized zinc, and potassium-added oxidized oxide. Zinc, silicon-added zinc oxide, metal oxides such as zinc oxide tin monoxide, indium oxide tin oxide, zinc oxide, indium oxide and magnesium oxide can be exemplified. It may be formed as a composite. Examples of a method for forming the transparent conductive films 12 and 22 include a PVD method such as a sputtering method, a vacuum evaporation method, and an ion plating method, a CVD method, a coating method, and a printing method.
[0014] 透明導電膜 12, 22は、図 2及び図 3に示すように、平行に延びる複数の帯状導電 部 12a, 22aの集合体としてそれぞれ形成されており、各透明導電膜 12, 22の帯状 導電部 12a, 22aは、互いに直交するように配置されている。透明導電膜 12, 22は、 導電性インクなど力もなる引き廻し回路（図示せず)を介して外部の駆動回路（図示 せず）に接続される。透明導電膜 12, 22のノターン形状は、本実施形態のものに限 定されず、指などの接触ポイントを検出可能である限り、任意の形状とすることができ る。 As shown in FIGS. 2 and 3, the transparent conductive films 12 and 22 are each formed as an aggregate of a plurality of strip-shaped conductive portions 12a and 22a extending in parallel. The strip-shaped conductive portions 12a and 22a are arranged to be orthogonal to each other. The transparent conductive films 12 and 22 are connected to an external drive circuit (not shown) through a drawing circuit (not shown) that also has a strong force such as conductive ink. Not connected). The shape of the turn of the transparent conductive films 12 and 22 is not limited to that of the present embodiment, but may be any shape as long as a contact point such as a finger can be detected.
[0015] タツチ位置の検出方法は、従来の静電容量式のタツチパネルと同様であり、第 1面 状体 1の表面側における任意の位置を指などで触れると、透明導電膜 12, 22は接 触位置において人体の静電容量を介して接地され、このときに透明導電膜 12, 22を 流れる電流値を検出することにより、接触位置の座標が演算される。  [0015] A touch position detection method is the same as that of a conventional capacitive touch panel. When an arbitrary position on the surface side of the first planar body 1 is touched with a finger or the like, the transparent conductive films 12 and 22 become in contact with each other. The coordinates of the contact position are calculated by detecting the value of the current flowing through the transparent conductive films 12 and 22 at this time through the capacitance of the human body at the contact position.
[0016] 透明導電膜 12, 22のパターユングは、透明基板 11, 21にアンダーコート層 13, 2 3を介してそれぞれ形成された透明導電膜 12, 22の表面に、所望のパターン形状を 有するマスク部を形成して露出部分を酸液などでエッチング除去した後、アルカリ液 などによりマスク部を溶解させて、行うことができる。このように透明導電膜 12, 22の パター-ングをエッチングにより行う方法は、不要な透明導電膜 12, 22は除去できる 一方、アンダーコート層 13, 23は全て残存させることができる。但し、透明導電膜 12 , 22のパターニングは、このような方法に限定されるものではなぐ例えば、アンダー コート層 13, 23を除去してもよぐ或いは、公知の他の方法でパターユングしてもよい  The pattern of the transparent conductive films 12 and 22 has a desired pattern shape on the surfaces of the transparent conductive films 12 and 22 formed on the transparent substrates 11 and 21 via the undercoat layers 13 and 23, respectively. After the mask portion is formed and the exposed portion is removed by etching with an acid solution or the like, the mask portion can be dissolved with an alkali solution or the like to perform the process. In the method in which the transparent conductive films 12 and 22 are patterned by etching, unnecessary transparent conductive films 12 and 22 can be removed, while the undercoat layers 13 and 23 can all remain. However, the patterning of the transparent conductive films 12 and 22 is not limited to such a method. For example, the patterning of the transparent conductive films 12 and 22 may be performed by removing the undercoat layers 13 and 23 or by patterning using another known method. Good
[0017] 第 1面状体 1と第 2面状体 2との貼着は、空気層が介在しないように、粘着層 15を全 体に介在させて行うことが好ましい。粘着層 15は、エポキシ系やアクリル系など、一 般的な透明接着剤を用いることができ、ノルボルネン系榭脂の透明性フィルム力ゝらな る芯材を含むものであってもよ 、。 [0017] It is preferable that the first planar body 1 and the second planar body 2 are attached to each other with the adhesive layer 15 interposed therebetween so that an air layer does not intervene. The adhesive layer 15 can use a general transparent adhesive such as an epoxy-based or acrylic-based adhesive, and may include a core material that is a transparent film of a norbornene-based resin.
[0018] 円偏光板 6は、直線偏光板 4と λ Ζ4位相差板 5とを全面貼りすることにより形成さ れる。直線偏光板 4は、ヨウ素や二色性染料などの二色性色素を吸着配向させたポリ ビュルアルコール（PVA)の延伸フィルムを例示することができ、このフィルムの両面 を、保護フィルムとしてのトリァセチルアセテート (TAC)フィルムで挟持するように貼り 合わせたものを使用してもよい。また、 λ Ζ4位相差板 5は、ポリビュルアルコール (Ρ VA)やポリカーボネート (PC)フィルムを延伸して複屈曲性を付与したものを例示す ることができる。円偏光板 6と第 1面状体 1との貼着についても、粘着層 15と同様の材 料力 なる粘着層 9を介して、空気層が介在しないように全面貼着により行われること が好ましい。 The circularly polarizing plate 6 is formed by adhering the entire surface of the linearly polarizing plate 4 and the λ 4 retardation plate 5. The linear polarizing plate 4 can be, for example, a stretched film of polyvinyl alcohol (PVA) in which a dichroic dye such as iodine or a dichroic dye is adsorbed and oriented. It may be used so as to be sandwiched between cetyl acetate (TAC) films. The λΖ4 retardation plate 5 may be, for example, a film obtained by stretching a polybutyl alcohol (ΡVA) or polycarbonate (PC) film to impart birefringence. Adhesion between the circularly polarizing plate 6 and the first planar body 1 is also performed through the adhesive layer 9 having the same material strength as that of the adhesive layer 15 so that no air layer is interposed therebetween. Is preferred.
[0019] 本発明の透明タツチスィッチによれば、透明基板 11, 21の材料としてノルボルネン 系榭脂を選択すると共に、アンダーコート層 13, 23を介して透明導電膜 12, 22を形 成するようにしているので、後述する実験結果に示すように、透明導電膜 12, 22のパ ターンを目立ちに《することができ、視認性を向上させることができる。また、透明基 板 11の表面側に円偏光板 6を設けた場合には、視認性をより向上させることができる  According to the transparent touch switch of the present invention, a norbornene-based resin is selected as a material for the transparent substrates 11 and 21, and the transparent conductive films 12 and 22 are formed via the undercoat layers 13 and 23. Therefore, as shown in the experimental results described later, the patterns of the transparent conductive films 12 and 22 can be noticeable, and the visibility can be improved. Further, when the circularly polarizing plate 6 is provided on the surface side of the transparent substrate 11, the visibility can be further improved.
[0020] 以上、本発明の一実施形態について詳述したが、本発明の具体的な態様は上記 実施形態に限定されない。例えば、図 1に示す透明タツチスィッチにおいて、第 2面 状体 2の裏面側に、粘着層 15と同様の材料からなる粘着層 16を介して λ Ζ4位相差 板 8を全面貼着することにより、図 4に示す透明タツチスィッチ 102を構成してもよぐ これによつて、更なる視認性の向上を図ることができる。図 4において、 λ Ζ4位相差 板 8は、光学軸が λ Ζ4位相差板 5の光学軸に対して直交するように配置されること が好ましい。尚、図 2において、図 1と同様の構成部分には同一の符号を付している（ 以下の図面につ!、ても同様)。 As described above, one embodiment of the present invention has been described in detail, but specific aspects of the present invention are not limited to the above embodiment. For example, in the transparent touch switch shown in FIG. 1, a λΖ4 retardation plate 8 is adhered to the entire back surface of the second planar body 2 via an adhesive layer 16 made of the same material as the adhesive layer 15, whereby The transparent touch switch 102 shown in FIG. 4 may be configured, so that the visibility can be further improved. In FIG. 4, it is preferable that the λΖ4 retardation plate 8 is arranged so that the optical axis is orthogonal to the optical axis of the λΖ4 retardation plate 5. In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals (the same applies to the following drawings).
[0021] また、図 1に示す透明基板 11に代えて、図 5に示すように、ノルボルネン系榭脂から なる λ /4位相差板を透明基板 31として使用し、この λ /4位相差板にアンダーコ ート層 13を介して透明導電膜 12が形成されるようにして、透明タツチスィッチ 103を 構成してもよい。この場合、透明基板 31のタツチ側（表面側）には、粘着層 9を介して 直線偏光板 4のみを形成すればょ 、。  Further, instead of the transparent substrate 11 shown in FIG. 1, as shown in FIG. 5, a λ / 4 retardation plate made of norbornene-based resin is used as the transparent substrate 31, and the λ / 4 retardation plate is used. The transparent touch switch 103 may be configured such that the transparent conductive film 12 is formed via the undercoat layer 13. In this case, only the linear polarizing plate 4 should be formed on the touch side (front side) of the transparent substrate 31 via the adhesive layer 9.
[0022] また、図 1に示す透明基板 21に代えて、図 6に示すように、ノルボルネン系榭脂から なる λ /4位相差板を透明基板 41として使用し、この λ /4位相差板にアンダーコ ート層 23を介して透明導電膜 22が形成されるようにして、透明タツチスィッチ 104を 構成してもよい。更に、図 5に示す透明基板 21に代えて、上述した透明基板 41を用 いることちでさる。  Further, instead of the transparent substrate 21 shown in FIG. 1, as shown in FIG. 6, a λ / 4 retardation plate made of norbornene-based resin is used as the transparent substrate 41, and this λ / 4 retardation plate is used. The transparent touch switch 104 may be configured such that the transparent conductive film 22 is formed via the undercoat layer 23. Further, the transparent substrate 41 described above is used instead of the transparent substrate 21 shown in FIG.
[0023] また、上記各実施形態において、各透明導電膜 12, 22は必ずしも対向するように 配置される必要はなぐ例えば、図 7に示すように、透明基板 11における透明導電膜 12の形成面と反対側の面が、粘着層 15を介して、透明基板 21における透明導電膜 22の形成面に貼着されるように構成してもよ 、。 In each of the above embodiments, the transparent conductive films 12 and 22 need not necessarily be arranged to face each other. For example, as shown in FIG. The other side is the transparent conductive film on the transparent substrate 21 via the adhesive layer 15. It may be configured to be attached to the formation surface of the 22.
実施例  Example
[0024] 以下、実施例及び比較例に基づき本発明をより詳細に説明する。但し、本発明が、 以下の実施例に限定されるものではない。  Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples. However, the present invention is not limited to the following examples.
[0025] まず、図 4に示す構成の透明タツチパネルを作製した。サイズは、縦 5cm、横 7cmと した。第 1面状体 1の透明基板 11は、ノルボルネン系榭脂の光等方性フィルムである 日本ゼオン (株)製の「ゼォノア」を使用し、厚みは 188 mとした。また、アンダーコ ート層 13は、厚み約 30nmの酸化シリコン層と、厚み約 70nmのシリコン錫酸化物層 とをこの順で積層した積層体とし、透明導電膜 12は、厚み 30nmのインジウム錫酸ィ匕 物層をスパッタリングにより形成した。表面抵抗率は、約 250 Ω /口であった。第 2面 状体 2の透明基板 21、アンダーコート層 23及び透明導電膜 22の材料及び厚みは、 それぞれ第 1面状体 1の透明基板 11、アンダーコート層 13及び透明導電膜 12の材 料及び厚みと同じにした。  First, a transparent touch panel having the configuration shown in FIG. 4 was produced. The size is 5cm long and 7cm wide. The transparent substrate 11 of the first planar body 1 was made of “Zeonor” made by Nippon Zeon Co., Ltd., which is an optically isotropic film of norbornene resin, and had a thickness of 188 m. The undercoat layer 13 is a laminate in which a silicon oxide layer having a thickness of about 30 nm and a silicon tin oxide layer having a thickness of about 70 nm are laminated in this order, and the transparent conductive film 12 has a thickness of 30 nm indium stannate. A film layer was formed by sputtering. The surface resistivity was about 250 Ω / mouth. The material and thickness of the transparent substrate 21, the undercoat layer 23, and the transparent conductive film 22 of the second planar body 2 are the same as those of the transparent substrate 11, the undercoat layer 13, and the transparent conductive film 12 of the first planar body 1, respectively. And the thickness.
[0026] 透明導電膜 12, 22のノ^ーン形状は、図 2及び図 3に示すように短冊状とし、各帯 状導電部 12a, 22aの幅は 0. 3mm,間隔は 4. Ommとした。透明導電膜 12, 22の ノターン形成は、本実施形態で示したようにエッチングにより行った。  [0026] The shape of the transparent conductive films 12 and 22 is a strip as shown in Figs. 2 and 3, and the width of each of the conductive strips 12a and 22a is 0.3 mm and the interval is 4. Omm. And The formation of the turns of the transparent conductive films 12 and 22 was performed by etching as described in the present embodiment.
[0027] 円偏光板 6は、住友化学工業 (株)製のタツチパネル用片面粘着剤付きの円偏光 板である厚みが 0. 45mm,想定波長が 550nmの PET—AR円偏光板 (表面力 順 に、 PETフィルム、直線偏光板および λ Ζ4板が積層されたものであり、 PETフィル ム： PET-AG7AR、直線偏光板： SQW252AW0)を使用した。また、 λ Ζ4位相差板 8は 、住友ィ匕学工業 (株)製の λ Ζ4板（品番: AGU-(U- S、型番: WH157)を使用した。 粘着層 9, 15, 16には、リンテック (株)製のアクリル系粘着剤「P043FP」を使用した  The circular polarizer 6 is a circular polarizer with a single-sided adhesive for a touch panel manufactured by Sumitomo Chemical Co., Ltd., which has a thickness of 0.45 mm and an assumed wavelength of 550 nm. In addition, a PET film, a linear polarizing plate and a λ 板 4 plate were laminated, and a PET film: PET-AG7AR and a linear polarizing plate: SQW252AW0) were used. The λΖ4 retardation plate 8 used was a λΖ4 plate (product number: AGU- (U-S, model number: WH157)) manufactured by Sumitomo Iridaku Kogyo Co., Ltd. Used acrylic adhesive "P043FP" manufactured by Lintec Co., Ltd.
[0028] こうして製造された透明タツチスィッチのタツチ側（表面側）に、 24Wの 3波長形蛍 光灯を照射し、照射角度を変えながら透明導電膜 12, 22のパターン形状が視認で きる力否かを目視検査した。 The touch side (front side) of the transparent touch switch manufactured in this manner is irradiated with a 24 W three-wavelength fluorescent lamp, and the force at which the pattern shape of the transparent conductive films 12 and 22 can be visually recognized while changing the irradiation angle. Was visually inspected.
[0029] また、この透明タツチパネルの分光反射率 (波長 550nm)及び全光線透過率を、 JI SK7361—1に準じてそれぞれ測定し、各透明導電膜 12, 22が重なった部分と、透 明導電膜 12, 22が ヽずれも形成されて ヽな 、部分との測定値の差である相違値を 求めた。分光反射率の測定には、（株）日立製作所の分光光度計 (U— 3310)を用 い、全光線透過率の測定には、日本電色工業 (株）のデジタル濁度計 (NDH5000 W)を用いた。この結果を、表 1に実施例 1として示す。 Further, the spectral reflectance (wavelength 550 nm) and the total light transmittance of this transparent touch panel were measured in accordance with JI SK7361-1, and the portion where each transparent conductive film 12 and 22 overlapped and the transmittance were measured. The difference value, which is the difference between the measured values of the bright conductive films 12 and 22 where no misalignment was formed, was determined. A spectrophotometer (U-3310) manufactured by Hitachi, Ltd. was used to measure the spectral reflectance, and a digital turbidimeter (NDH5000W, Nippon Denshoku Industries Co., Ltd.) was used to measure the total light transmittance. ) Was used. The results are shown in Table 1 as Example 1.
[0030] [表 1] [Table 1]
Figure imgf000009_0001
Figure imgf000009_0001
[0031] 実施例 1の目視結果は、透明導電膜 12, 22のパターン形状が両者の重なり合う部 分も含めて目立たず、良好な視認性が得られた。また、分光反射率及び全光線透過 率の相違値は、いずれも小さい値であった。 The visual results of Example 1 showed that the pattern shapes of the transparent conductive films 12 and 22 were inconspicuous including the portions where the transparent conductive films 12 and 22 overlapped, and good visibility was obtained. The difference between the spectral reflectance and the total light transmittance was a small value.
[0032] 上記と同様の試験を、図 1に示す構成の透明タツチパネルについても行った。図 1 に示す構成において、図 4と同様の構成部分の材料及び厚みは、上記と同じとした。 この結果を表 1に実施例 2として示す。更に、実施例 2の透明タツチパネルにおいて 円偏光板 6を設けない構成についても、上記と同様の試験を行った。この結果を、表 1に実施例 3として示す。 [0032] The same test as described above was also performed on the transparent touch panel having the configuration shown in FIG. In the configuration shown in FIG. 1, the material and thickness of the same components as in FIG. 4 were the same as above. The results are shown in Table 1 as Example 2. Further, the same test as described above was performed on the transparent touch panel of Example 2 in which the circularly polarizing plate 6 was not provided. The result is This is shown as Example 3 in FIG.
[0033] 実施例 2の目視結果は、実施例 1と同様に良好な視認性が得られる結果となった。  [0033] The visual result of Example 2 was such that good visibility was obtained as in Example 1.
また、分光反射率及び全光線透過率の相違値は、いずれも小さい値であった。一方 、実施例 3の目視結果は、注意深く確認すると透明導電膜 12, 22のパターン形状を 認識可能な結果であり、分光反射率及び全光線透過率の相違値は、実施例 1及び 2 に比べて、いずれも若干高い値であった。  Further, the difference between the spectral reflectance and the total light transmittance was a small value. On the other hand, the visual result of Example 3 is a result that, when carefully checked, the pattern shape of the transparent conductive films 12 and 22 can be recognized, and the difference between the spectral reflectance and the total light transmittance is smaller than that of Examples 1 and 2. In each case, the values were slightly higher.
[0034] 次に、透明基板 11, 21の材料を、日本ゼオン (株)製の「ゼォノア」に代えて、同じ ノルボルネン系榭脂の光等方性フィルムである JSR (株)製の「アートン」（厚み 188 μ m)を用い、このフィルムの両万にハードコート加工を施す他は、実施例 1から 3と同じ 条件として、上記と同様の試験を行った。この結果を表 1に実施例 4から 6として示す  Next, the material of the transparent substrates 11 and 21 was changed to “Zeonor” manufactured by Zeon Corporation and replaced by “ARTON” manufactured by JSR Corporation, which is the same norbornene-based resin optically isotropic film. (Thickness: 188 μm) and the same test as above was performed under the same conditions as in Examples 1 to 3, except that hard coat processing was performed on both 20,000 of this film. The results are shown in Table 1 as Examples 4 to 6.
[0035] 実施例 4及び 5の目視結果は、実施例 1と同様に良好な視認性が得られる結果とな つた。また、分光反射率及び全光線透過率の相違値は、いずれも小さい値であった 。一方、実施例 6の目視結果は、注意深く確認すると透明導電膜 12, 22のパターン 形状を認識可能な結果であり、分光反射率及び全光線透過率の相違値は、実施例 4及び 5に比べて、いずれも若干高い値であった。 The visual results of Examples 4 and 5 were such that good visibility was obtained as in Example 1. Further, the difference between the spectral reflectance and the total light transmittance was a small value. On the other hand, the visual result of Example 6 is a result that the pattern shape of the transparent conductive films 12 and 22 can be recognized when carefully checked, and the difference between the spectral reflectance and the total light transmittance is smaller than that of Examples 4 and 5. In each case, the values were slightly higher.
[0036] 次に、透明基板 11, 21の材料を、 PESフィルムである住友ベークライト (株)製の「 スミライト FST」（厚み 188 m)を用いる他は、実施例 1から 3と同じ条件として、上記 と同様の試験を行った。この結果を表 1に比較例 1から 3として示す。  Next, the same conditions as in Examples 1 to 3 were used except that the material of the transparent substrates 11 and 21 was PSM film “Sumilite FST” (188 m thick) manufactured by Sumitomo Bakelite Co., Ltd. The same test as above was performed. The results are shown in Table 1 as Comparative Examples 1 to 3.
[0037] 比較例 1から 3の目視結果は、いずれも透明導電膜 12, 22のパターン形状がはつ きり認識でき、視認性に劣る結果となった。また、分光反射率及び全光線透過率の相 違値は、実施例 1から 3に比べて、いずれも高い値であった。  The visual results of Comparative Examples 1 to 3 all showed that the pattern shapes of the transparent conductive films 12 and 22 were clearly recognizable, resulting in poor visibility. In addition, the difference between the spectral reflectance and the total light transmittance was higher than those in Examples 1 to 3.
[0038] 次に、アンダーコート層 13, 23を形成せずに直接透明導電膜 12, 22を形成する 他は、実施例 1から 3と同じ条件として、上記と同様の試験を行った。この結果を表 1 に比較例 4から 6として示す。  Next, a test similar to the above was performed under the same conditions as in Examples 1 to 3, except that the transparent conductive films 12 and 22 were formed directly without forming the undercoat layers 13 and 23. The results are shown in Table 1 as Comparative Examples 4 to 6.
[0039] 比較例 4から 6の目視結果は、いずれも透明導電膜 12, 22のパターン形状がはつ きり認識でき、視認性に劣る結果となった。また、分光反射率及び全光線透過率の相 違値は、実施例 1から 3に比べて、いずれも高い値であった。 産業上の利用可能性 The visual results of Comparative Examples 4 to 6 were all such that the pattern shapes of the transparent conductive films 12 and 22 could be clearly recognized, resulting in poor visibility. In addition, the difference between the spectral reflectance and the total light transmittance was higher than those in Examples 1 to 3. Industrial applicability
本発明によれば、視認性を向上させることができる静電容量式の透明タツチスイツ チを提供することができる。  ADVANTAGE OF THE INVENTION According to this invention, the transparent touch switch of an electrostatic capacitance type which can improve visibility can be provided.

Claims

請求の範囲 The scope of the claims
[1] 透明導電膜がそれぞれパターユングされ、粘着層を介して互いに貼着される一対の 透明基板を備え、一方の前記透明基板における表面側の接触位置を検出可能な静 電容量式の透明タツチスィッチであって、  [1] A transparent conductive film is provided with a pair of transparent substrates, each of which is patterned and adhered to each other via an adhesive layer, and a capacitive transparent type capable of detecting a contact position of one of the transparent substrates on the front surface side. Tatsuchi switch,
前記各透明基板は、 V、ずれもノルボルネン系榭脂から構成され、  Each of the transparent substrates is made of a norbornene-based resin, and the deviation is V,
前記各透明導電膜は、いずれもアンダーコート層を介して形成されており、 前記アンダーコート層は、該アンダーコート層形成前の前記透明基板よりも光透過 率が高くなるように、光屈折率が異なる 2以上の層を積層して構成されている透明タツ チスィッチ。  Each of the transparent conductive films is formed with an undercoat layer interposed therebetween, and the undercoat layer has a light refractive index such that the light transmittance is higher than that of the transparent substrate before the formation of the undercoat layer. The transparent touch switch is composed of two or more layers that differ from each other.
[2] 一方の前記透明基板の表面側に、円偏光板が設けられている請求項 1に記載の透 明タツチスィッチ。  [2] The transparent touch switch according to claim 1, wherein a circularly polarizing plate is provided on a surface side of one of the transparent substrates.
[3] 他方の前記透明基板の裏面側に、 λ Ζ4位相差板が設けられている請求項 2に記 載の透明タツチスィッチ。  3. The transparent touch switch according to claim 2, wherein a λΖ4 retardation plate is provided on a back surface of the other transparent substrate.
[4] 前記透明導電膜のパターユングは、エッチングにより行われる請求項 1から 3のいず れかに記載の透明タツチスィッチ。 4. The transparent touch switch according to claim 1, wherein the patterning of the transparent conductive film is performed by etching.
[5] 一対の前記透明基板は、それぞれの透明導電膜が対向した状態で、空気層が介在 しな 、ように貼着されて 、る請求項 1から 4の 、ずれかに記載の透明タツチスィッチ。 [5] The transparent touch switch according to any one of claims 1 to 4, wherein the pair of transparent substrates are adhered so that an air layer does not intervene in a state where the respective transparent conductive films face each other. .
[6] 前記アンダーコート層は、酸ィ匕シリコン層およびシリコン錫酸ィ匕物層がこの順で積層 されて形成されて 、る請求項 1から 5の 、ずれか〖こ記載の透明タツチスィッチ。 6. The transparent touch switch according to claim 1, wherein the undercoat layer is formed by laminating an silicon oxide layer and a silicon tin oxide layer in this order.
PCT/JP2005/006902 2004-04-08 2005-04-08 Transparent touch switch WO2005098585A1 (en)

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