JP6127251B2 - Touch panel - Google Patents

Description

  The present invention relates to a touch panel.

  Various configurations of a touch panel for detecting an input position have been conventionally studied. For example, the touch panel has a structure in which transparent planar bodies 101 and 102 are overlapped as shown in FIGS. ing. Each of the transparent planar bodies 101 and 102 includes transparent substrates 103 and 104, transparent electrodes 105 and 106 having a predetermined pattern shape formed on one surface of the transparent substrates 103 and 104, and the transparent electrodes 105 and 106. Are connected to the electrode portions 105a and 106a, and lead wires 107 and 108 extending so that the other end is disposed on the side edge of each of the substrates 103 and 104. The other ends of the plurality of lead-out wirings 107 and 108 are arranged so as to be gathered together at a predetermined location on the side edge of each of the transparent substrates 103 and 104.

  Further, as shown in the schematic configuration cross-sectional view of FIG. 6, the other ends of the plurality of lead-out wirings 107 and 108 arranged so as to be gathered together at predetermined positions on the side edge portions of the transparent substrates 103 and 104 are as shown in FIG. A connector portion 112a of the flexible wiring board 112 that guides a touch signal (input signal) to an external touch position determination circuit is connected. In addition, such a touch panel has an air layer G between the display surface of a display device in a game machine, a ticket machine, a conference table, a bank terminal (cash dispenser), a personal computer, an electronic notebook, a PDA, a mobile phone or the like. Installed in the display device. Note that the flexible wiring board 112 is normally bent toward the display device 111 and connected to the touch position determination circuit.

  Here, when the touch panel is installed on the display device in a state where the air layer G is provided between the display surface and the display surface, the air layer G provided between the display surface and the display surface is present. Incident light is easily reflected on the display surface, and the reflected light causes a problem that it is difficult for a touch panel user to visually recognize character information, graphic information, and the like displayed on the display. In order to prevent such reflection in the air layer G, a λ / 4 retardation plate 109 and a linear polarizing plate 110 are further provided on the surface of the touch panel as shown in FIG. Reference 1). The λ / 4 retardation plate 109 is attached to the transparent planar body 101 via an adhesive layer, and the linear polarizing plate 110 is attached to the λ / 4 retardation plate 109 via an adhesive layer. ing.

Japanese Patent No. 3854392

  In the above-mentioned flexible wiring board connection structure, when the flexible wiring board is bent and connected to an external touch position determination circuit, the connector part of the flexible wiring board is pulled out along with the bending of the flexible wiring board. There is a problem that a large bending stress is generated at a connection point with the wiring, and the transparent planar body is broken or broken.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a touch panel that can effectively prevent breakage such as bending or cracking.

The above object of the present invention is a touch panel installed on the display device by providing an air layer between the display surface of the display device, and in order from the display device side, a λ / 4 phase difference plate, a touch position detection An electrode layer and a linear polarizing plate are disposed, and the linear polarizing plate is laminated on the electrode layer.

  As described above, by configuring the touch panel so that the electrode layer for detecting the touch position is sandwiched between the polarizing plate and the retardation plate, the polarizing plate and the retardation plate function as a reinforcing plate for the electrode layer. As a result, even if the flexible wiring board connected to the electrode in the electrode layer and pulled out from the side of the electrode layer is bent, a large bending stress is generated in the connection portion between the flexible wiring board and the electrode layer. It can be effectively suppressed, and the electrode layer can be effectively prevented from being bent or broken, and the reflected light reflected on the display surface can be effectively cut and displayed on the display. It is possible to improve the visibility of text information and image information.

  In this touch panel, the electrode layer includes a first planar body having a first electrode patterned on one surface of the first substrate and a first lead wiring electrically connected to the first electrode. And having a first connector portion that is electrically connected to the one end portion of the first lead-out wiring at the side edge portion of the first substrate where the one end portion serving as the connection terminal of the first lead-out wiring is disposed. And it is preferable to provide the flexible wiring board pulled outside from the side of the said 1st planar body.

  The electrode layer includes a first electrode patterned on one surface of the first substrate, a first planar body having a first lead wire electrically connected to the first electrode, and a second substrate. A second electrode patterned on the surface and a second planar body having a second lead wiring electrically connected to the second electrode, and one end portion serving as a connection terminal of the first lead wiring is In the side edge portion of the first substrate to be arranged, a first connector portion that overlaps and electrically connects to one end portion of the first lead-out wiring, and one end portion that serves as a connection terminal of the second lead-out wiring are arranged. And a second connector portion that overlaps and electrically connects to one end portion of the second lead wiring at the side edge portion of the second substrate, and is flexible to be drawn out from the side of the electrode layer Provide wiring board Door is preferable.

  The first substrate and the second substrate are preferably formed of a light isotropic film. The touch panel is preferably configured to detect a touch position based on a change in capacitance between the electrode layer and the human body.

  According to the present invention, it is possible to provide a touch panel that can effectively prevent breakage such as bending or cracking.

It is a schematic structure sectional view of a touch panel concerning an embodiment of the present invention. It is a top view of the 1st planar body and 2nd planar body with which the touch panel shown in FIG. 1 is provided. It is a top view of the flexible wiring board with which the touch panel shown in FIG. 1 is provided. It is a schematic structure sectional view of a touch panel concerning an embodiment of the present invention. It is explanatory drawing for demonstrating the structure of the conventional touch panel. It is schematic structure sectional drawing of the conventional touch panel.

  Hereinafter, a touch panel 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings. Each drawing is partially enlarged or reduced to facilitate understanding of the configuration, not the actual size ratio. The touch panel 100 according to an embodiment of the present invention is used by being attached to a display surface 8a of a display device such as a bank terminal (cash dispenser), a ticket vending machine, a personal computer, an OA device, an electronic notebook, a PDA, and a mobile phone. This is a capacitive touch panel. The touch panel 100 is installed on the display device 8 with an air layer G provided between the display surface 8a of the display device. Specifically, as shown in the schematic cross-sectional view of FIG. 1, the display surface 8 a and the touch panel 100 are connected via a frame-shaped spacer member 9 arranged along the side edge of the display of the display device 8. The touch panel 100 is attached so as to form an air layer G therebetween. The frame-shaped spacer member 9 is preferably formed of an adhesive. Further, as shown in the schematic configuration sectional view of FIG. 1, the touch panel 100 includes a λ / 4 phase difference plate 4, an electrode layer 1 for detecting a touch position, and a linear polarizing plate 5 that are sequentially arranged from the display device 8 side. I have. The λ / 4 phase difference plate 4 and the electrode layer 1, and the electrode layer 1 and the linearly polarizing plate 5 are bonded by adhesive layers 6 a and 6 c, respectively.

  The λ / 4 phase difference plate 4 is a phase film that causes a phase difference of about ¼ wavelength in the film plane. Polyvinyl alcohol (PVA), polycarbonate (PC), norbornene-based thermoplastic resin, cyclic polyolefin Examples thereof include those obtained by stretching a transparent film such as a cycloolefin resin made of a resin, a cycloolefin polymer (COP) or a cycloolefin copolymer (COC) to impart biflexibility. The λ / 4 phase difference plate 4 is bonded so that the slow axis thereof and the transmission axis of the linear polarizing plate 5 form an angle of 45 degrees. The thickness of the λ / 4 retardation plate 4 is preferably about 50 μm to 200 μm, and more preferably about 70 μm to 150 μm. The retardation value of the λ / 4 retardation plate 4 is preferably about 138 nm ± 20 nm, more preferably about 138 nm ± 10 nm.

  The linearly polarizing plate 5 is a film body having a polarizer having a function of separating incident light into two orthogonally polarized components, transmitting one polarized component, and absorbing or reflecting the other polarized component. Examples of the absorbing polarizer that absorbs the polarizing component include hydrophilic polymer films such as a polyvinyl alcohol film, a partially formalized polyvinyl alcohol film, and an ethylene / vinyl acetate copolymer partially saponified film. Examples include uniaxially stretched films adsorbed with dichroic substances such as chromatic dyes, and polyene-based oriented films such as polyvinyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products. Among these, a polarizer obtained by adsorbing a dichroic substance such as iodine on a polyvinyl alcohol film and uniaxially stretching is particularly preferable because of its high polarization dichroic ratio. In addition, examples of the reflective polarizer that reflects the polarization component include a multilayer reflective polarizer, a cholesteric reflective polarizer, a dispersed phase reflective polarizer, and a wire grid reflective polarizer. The thickness of the linear polarizing plate 5 is preferably about 100 μm to 200 μm.

  The electrode layer 1 includes a first planar body 2 and a second planar body 3. As shown in the cross-sectional view of FIG. 1 and the plan view of FIG. 2A, the first planar body 2 includes a first substrate 21 and a first electrode 22 patterned on one surface of the first substrate 21. And a first lead-out wiring 23 that is electrically connected to each electrode portion 22a constituting the first electrode 22. Similarly, as shown in the cross-sectional view of FIG. 1 and the plan view of FIG. 2B, the second planar body 3 is patterned on the second substrate 31 and one surface of the second substrate 31. An electrode 32 and a second lead-out wiring 33 that is electrically connected to an electrode portion 32 a that constitutes the second electrode 32 are provided. As shown in FIG. 1, the first planar body 2 and the second planar body 3 are formed such that the other surface side of the first electrode 22 and the second substrate 31 (the surface side on which the second electrode 32 is not formed). The adhesive layers 6b are attached so as to face each other while being separated from each other. The first planar body 2 and the second planar body 3 may be attached via the adhesive layer 6b so that the first electrode 22 and the second electrode 32 face each other apart from each other. Alternatively, the other surface of the first substrate 21 and the second electrode 32 may be attached via the adhesive layer 6b so as to face each other while being separated from each other. Furthermore, the other surface side of the first substrate 21 (the surface side where the first electrode 22 is not formed) and the other surface side of the second substrate 31 (the surface side where the second electrode 32 is not formed) The first planar body 2 and the second planar body 3 are attached via the adhesive layer 6b so as to be opposed to each other so that the first electrode 22 and the second electrode 32 face in opposite directions. It may be configured.

  The first substrate 21 and the second substrate 31 are dielectric substrates constituting an insulating layer, and are preferably made of a highly transparent material. For example, polyethylene terephthalate (PET), polyimide (PI), polyethylene naphthalate (PEN), polyethersulfone (PES), polyetheretherketone (PEEK), polycarbonate (PC), polypropylene (PP), polyamide (PA) , Cycloolefin resin comprising acrylic, amorphous polyolefin resin, cyclic polyolefin resin, aliphatic cyclic polyolefin, norbornene thermoplastic transparent resin, cycloolefin polymer (COP) or cycloolefin copolymer (COC) These are formed of a flexible film made of a synthetic resin such as or the like, or a laminate of two or more of these, or a glass plate such as soda glass, alkali-free glass, borosilicate glass, or quartz glass. Although the thickness of the 1st board | substrate 21 and the 2nd board | substrate 31 is not specifically limited, For example, when comprising the 1st board | substrate 21 and the 2nd board | substrate 31 with the flexible film made from a synthetic resin, it is about 10 micrometers-about 2000 micrometers. It is preferable to set it to about 50 μm to 500 μm.

  Moreover, when forming the 1st board | substrate 21 and the 2nd board | substrate 31 from a flexible material, in order to provide rigidity to the said 1st board | substrate 21 and the 2nd board | substrate 31, you may stick a support body. Examples of the support include a glass plate and a resin material having a hardness equivalent to glass, and the thickness is preferably 100 μm or more, and more preferably 0.2 mm to 10 mm. In addition, the surface of the first substrate 21 and the second substrate 31 is subjected to plasma treatment for improving wettability, the hard coat layer for surface protection, and the adhesion with the first electrode 22 and the second electrode 32. Necessary functional films such as an undercoat layer may be added for improvement and optical property improvement.

  Moreover, you may comprise the 1st board | substrate 21 and the 2nd board | substrate 31 with the optically isotropic film formed with the optically isotropic material. The optically isotropic material is a material that does not have polarization with respect to all incident light (the retardation value is about 0 nm to 10 nm). For example, polycarbonate (PC), polyethersulfone (PES), polyacrylic ( PAC), amorphous polyolefin resin, cyclic polyolefin resin, aliphatic cyclic polyolefin, norbornene thermoplastic transparent resin, glass material, and the like. As a method for forming the first substrate 21 and the second substrate 31 using these materials, a technique of casting or extrusion can be used.

  As shown in FIGS. 2A and 2B, the patterned first electrode 22 and second electrode 32 formed on one main surface of the first substrate 21 and the second substrate 31, respectively, have a predetermined interval. It is formed as an assembly of strip electrode portions 22a and 32a formed so as to extend in parallel with each other. The strip electrode portions 22a and 32a constituting the first electrode 22 and the second electrode 32 have a configuration in which a plurality of rhombic electrode bodies are linearly connected, and the rhombic electrodes in the first electrode 22 and the second electrode 32 The connecting directions of the portions are orthogonal to each other, and the upper and lower rhombus electrode portions are arranged so as not to overlap each other in plan view. In addition, the pattern shape of the 1st electrode 22 and the 2nd electrode 32 is not limited to the thing of this embodiment, As long as it can detect contact points, such as a finger | toe, it can be made into arbitrary shapes. For example, the strip electrode portions 22a and 32a may be rectangular as shown in FIG. However, for the operation performance such as the resolution of the touch panel 100, when the first planar body 2 and the second planar body 3 are overlapped, a configuration in which the area where the electrode portions 22a and 32a do not exist is reduced is adopted. Is better. From such a viewpoint, the pattern shape of the first electrode 22 and the second electrode 32 is preferably a configuration in which a plurality of rhombus electrode portions are connected in a straight line rather than a rectangular configuration. However, the present invention is not limited to this embodiment, and an appropriate pattern shape can be selected.

  Examples of materials for the first electrode 22 and the second electrode 32 include indium tin oxide (ITO), indium oxide, antimony-added tin oxide, fluorine-added tin oxide, aluminum-added zinc oxide, potassium-added zinc oxide, silicon-added zinc oxide, Transparent conductive materials such as zinc oxide-tin oxide system, indium oxide-tin oxide system, zinc oxide-indium oxide-magnesium oxide system, zinc oxide, tin oxide film, or tin, copper, aluminum, nickel, chromium, etc. Metal materials and metal oxide materials can be exemplified, and two or more of these materials may be combined to form. In addition, a simple metal weak against acid or alkali can be used as a conductive material.

In addition, a composite material in which ultrafine conductive carbon fibers such as carbon nanotubes, carbon nanohorns, carbon nanowires, carbon nanofibers, and graphite fibrils, and ultrafine conductive fibers made of silver or the like are dispersed in a polymer material functioning as a binder is first. It can also be used as a material for the electrode 22 and the second electrode 32. Here, a conductive polymer such as polyaniline, polypyrrole, polyacetylene, polythiophene, polyphenylene vinylene, polyphenylene sulfide, poly p-phenylene, polyheterocyclic vinylene, PEDOT: poly (3,4-ethylenedioxythiophene) should be adopted as the polymer material. Can do. In addition, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyetheretherketone (PEEK), polycarbonate (PC), polypropylene (PP), polyamide (PA), acrylic, polyimide, Non-conductive polymers such as epoxy resins, phenol resins, aliphatic cyclic polyolefins, norbornene-based thermoplastic transparent resins can be employed.

  When a carbon nanotube composite material in which carbon nanotubes are dispersed in a non-conductive polymer material is employed as the material of the first electrode 22 and the second electrode 32, the carbon nanotubes generally have a diameter of 0.8 nm to 1 .4 nm (around 1 nm) is extremely thin, so that dispersion of one or one bundle in a non-conductive polymer material reduces the amount of carbon nanotubes obstructing light transmission and ensures transparency of the transparent conductive film 3. This is preferable.

  Examples of the method for forming the first electrode 22 and the second electrode 32 include PVD methods such as sputtering, vacuum deposition, and ion plating, CVD, coating, and printing. In addition, the thickness of the first electrode 22 and the second electrode 32 is preferably 60 nm or less, and more preferably 30 nm or less, when an ITO film is formed by, for example, a sputtering method. Note that when the film thickness is 5 nm or less, it is difficult to form a continuous film, and it is difficult to form a stable conductive layer.

  The patterning of the first electrode 22 and the second electrode 32 is performed by forming a mask portion having a desired pattern shape on the surface of the ITO film or the like formed on the first substrate 21 and the second substrate 31 and exposing the exposed portion to the acid. After etching and removing with a solution or the like, the mask portion can be dissolved with an alkali solution or the like.

  The first lead wire 23 electrically connected to each strip electrode portion 22 a in the first electrode 22 and the second lead wire 33 electrically connected to each strip electrode portion 32 a in the second electrode 32 are the first electrode 22. The touch signal detected by the second electrode 32 is guided to a touch position determining circuit (not shown) disposed outside. As shown in FIGS. 2A and 2B, one end of each first lead-out wiring 23 is connected to each band-like electrode portion 22 a, and the other end is connected to the side edge of the first substrate 21. Has been placed. Similarly, one end portion of each second lead-out wiring 33 is connected to each band-shaped electrode portion 32 a, and the other end portion is disposed on the side edge portion of the second substrate 31. In addition, one end portions of the first lead-out wiring 23 and the second lead-out wiring 33 arranged at the side edge portions of the first substrate 21 and the second substrate 31 are arranged so as to be gathered together with a predetermined interval. Yes. One end portions of the first lead-out wiring 23 and the second lead-out wiring 33 arranged so as to form a group constitute a connection terminal, and the flexible wiring board 7 is connected to the connection terminal.

  The first lead-out wiring 23 and the second lead-out wiring 33 are formed by (A) screen printing a conductive paste containing conductive particles of metal such as silver on the first and second substrates 21 and 31, B) A method of laminating a metal foil such as copper on the first and second substrates 21, 31, forming a resist pattern on the metal foil, and etching the metal foil (see JP 2008-32884 A, etc.). It is done. The first and second lead wires 23 and 33 may be formed of the same material (indium tin oxide (ITO), conductive polymer, etc.) as the first electrode 22 and the second electrode 32 described above. When the first and second lead-out wirings 23 and 33 are formed of the same material as the first electrode 22 and the second electrode 32, the same method as the patterning method of the first electrode 22 and the second electrode 32, or the above (B) A formation method, a method of removing unnecessary regions by laser irradiation, or the like can be employed.

Examples of the conductive particles in the forming method (A) include fine particles containing silver as a main component. Further, for example, fine particles mainly containing any one of gold, silver, copper, an alloy of gold and silver, an alloy of gold and copper, an alloy of silver and copper, and an alloy of gold, silver, and copper may be used. In addition, indium tin oxide (ITO), conductive oxide in which zinc oxide is mixed with indium oxide (IZO [indium
zinc oxide]), or fine particles mainly composed of conductive oxide (ITSO) in which silicon oxide is mixed with indium oxide. In addition, as another conductive paste, a conductive material using a conductive polymer such as PEDOT (poly-3,4-ethylenedioxythiophene), or a fine conductive fiber such as carbon nanowire or metal nanowire as a conductor. Can be used. The formation method of the lead-out wirings 23 and 33 is not limited to the formation method of the above (A) and (B), and a printing method other than the above (A) such as gravure printing or a photo other than the above (B) Lithography may be used.

  The adhesive layers 6a, 6b, and 6c can be made of a general transparent adhesive such as epoxy or acrylic, and may include a core made of a polyester resin transparent film. Moreover, the adhesive layers 6a, 6b, and 6c may be formed by overlapping a plurality of sheet-like adhesive materials, and further, a plurality of types of sheet-like adhesive materials may be overlapped. The thickness of the adhesive layers 6a, 6b, and 6c is not particularly specified, but is practically preferably 20 μm to 500 μm.

  The flexible wiring board 7 is a film-like and flexible wiring board that can be bent freely, and is drawn out from the side of the electrode layer 1 composed of the first planar body 2 and the second planar body 3 to the outside. Arranged to be. As shown in FIG. 3, the flexible wiring board 7 in the present embodiment includes a connector portion 71 having a shape in which a tip portion is divided into two forks. The first connector portion 71a is configured to be overlapped and electrically connected to the connection terminal of the two lead wirings 32, and the other is overlapped to the connection terminal of the first lead wiring 23 as shown in the sectional view of FIG. The second connector portion 71b to be connected is configured. The first connector portion 71a and the second connector portion 71b are configured to have substantially the same thickness. The connector portion 71 is connected to the connection terminal of the lead-out wiring by an anisotropic conductive adhesive in which conductive particles are uniformly dispersed in a highly insulating adhesive.

  Further, in the above configuration, the connector portion 71 of the flexible wiring board 7 is configured to have a bifurcated shape, and one is connected to the connection terminal of the first lead-out wiring 23 and the other is connected to the first For example, two flexible wiring boards 7 are prepared, and each flexible wiring board 7 is connected to the connection terminal of the first lead-out wiring 23 and the second lead-out wiring, respectively. You may comprise so that it may connect to 33 connection terminals.

  In touch panel 100 having the above-described configuration, the touch position detection method is the same as that of a conventional capacitive touch switch. When an arbitrary position on the surface side of touch panel 100 is touched with a finger or the like, electrode layer 1 is touched. The first electrode 22 and the second electrode 32 are grounded via the capacitance of the human body at the contact position, and a current value flowing through the first electrode 22 and the second electrode 32 is detected (capacitance between the first electrode 22 and the human body). The coordinates of the contact position are calculated.

  Since the touch panel 100 of the present embodiment includes the linearly polarizing plate 5 and the λ / 4 phase difference plate 4, the reflected light reflected on the display surface 8a can be effectively cut and displayed on the display. It is possible to improve the visibility of text information and image information. More specifically, the external light incident on the touch panel 100 is polarized into horizontal linearly polarized light when passing through the linear polarizing plate 5, passes through the electrode layer 1, and enters the λ / 4 phase difference plate 4. . The horizontal linearly polarized light incident on the λ / 4 phase difference plate 4 is polarized into clockwise circularly polarized light and reflected by the display surface 8a. The reflected clockwise circularly polarized light becomes counterclockwise circularly polarized light when reflected, and is incident on the λ / 4 retardation plate 4 again. The counterclockwise circularly polarized light incident on the λ / 4 retardation plate 4 is polarized into vertical linearly polarized light when passing through the λ / 4 retardation plate 4, passes through the electrode layer 1, and enters the linear polarizing plate 5. Since the perpendicular linearly polarized light incident on the linearly polarizing plate 5 cannot pass through the linearly polarizing plate 5, the reflected light on the display surface 8a becomes invisible. By providing the linearly polarizing plate 5 and the λ / 4 retardation plate 4 in this way, reflection on the display surface 8a can be prevented, and as a result, the visibility of character information and image information displayed on the display can be improved. it can.

  Further, since the electrode layer 1 to which the flexible wiring board 7 is connected is sandwiched between the linear polarizing plate 5 and the λ / 4 retardation plate 4, the linear polarizing plate 5 and the λ / 4 retardation plate 4 are provided. When functioning as a reinforcing plate for the electrode layer 1 and bending the flexible wiring board 7 to connect to an external touch position determination circuit, the connection between the connector portion 71 of the flexible wiring board 7 and the lead wires 23 and 33 Generation | occurrence | production of a big bending stress in a location can be suppressed effectively. As a result, it is possible to effectively prevent the first planar body 2 and the second planar body 3 constituting the electrode layer 1 from being bent or broken.

  In particular, when the first substrate 21 and the second substrate 31 in the electrode layer 1 are made of an optical isotropic material, the first substrate 21 and the second substrate 31 made of the optical isotropic material are fragile and easily broken. However, by adopting a configuration in which the linearly polarizing plate 5 and the λ / 4 phase difference plate 4 are arranged on both sides of the electrode layer 1 as in the present invention, the first substrate 21 and the flexible circuit board 7 are bent. It is possible to prevent the second substrate 31 from cracking very effectively.

  As mentioned above, although one Embodiment of the touch panel 100 which concerns on this invention was described, a specific structure is not limited to the said embodiment. For example, in the above embodiment, a cover glass for protecting the touch panel 100, a cover film such as an anti-fingerprint film or an antireflection film may be arranged on the exposed surface (touch surface) of the linearly polarizing plate 5. . Further, a hard coat layer for preventing scratches, an antiglare (antiglare) treatment layer, or the like may be provided on one surface of the λ / 4 phase difference plate 4 (the surface facing the display surface 8a). .

  In the above embodiment, the electrode layer 1 is configured to include the first planar body 2 and the second planar body 3, and each includes the first electrode 22 and the second electrode 32. For example, the second planar body 3 is omitted, and the first electrode 22 and the second electrode 32 are respectively formed on both surfaces of the first substrate 21 in the first planar body 2. The electrode layer 1 may be configured. Alternatively, the electrode layer 1 is configured such that the first electrode 22 and the second electrode 32 are respectively formed on one surface of the first substrate 21 (the overlapping portion of the first electrode 22 and the second electrode 32 is insulated). Also good. Alternatively, the electrode layer 1 may be configured such that a dielectric layer is formed on the surface of one side of the first substrate 21 on which the first electrode 22 is formed, and further the second electrode 32 is formed.

  Moreover, in the said embodiment, as shown in FIG. 1, it is preferable to arrange | position the 2 (lambda) / 4 phase difference plate 10 to the display surface 8a of the display apparatus 8. As shown in FIG. In the case where the second λ / 4 phase difference plate 10 is provided, the slow axis of the second λ / 4 phase difference plate 10 and the slow axis of the λ / 4 phase difference plate 4 form an angle of 90 degrees. Thus, the second λ / 4 phase difference plate 10 is arranged. By adopting such a configuration, it is possible to cancel out the phase shift of the light emitted from the display device 8, and thus the visibility of the touch panel 100 can be improved.

DESCRIPTION OF SYMBOLS 100 Touch panel 1 Electrode layer 2 1st planar body 21 1st board | substrate 22 1st electrode 23 1st extraction wiring 3 2nd planar body 31 2nd board | substrate 31a Notch part 32 2nd electrode 33 2nd extraction wiring 4 lambda / 4 retardation plate 5 linearly polarizing plates 6a, 6b, 6c adhesive layer 7 flexible wiring board 71 connector portion 71a first connector portion 71b second connector portion 8 display device 8a display surface

Claims (5)

A touch panel installed on the display device by providing an air layer between the display surface of the display device,
In order from the display device side, a λ / 4 phase difference plate, an electrode layer for touch position detection, and a linear polarizing plate are arranged,
The touch panel, wherein the linearly polarizing plate is laminated on the electrode layer. The electrode layer includes a first planar body having a first electrode patterned on one surface of a first substrate and a first lead wiring electrically connected to the first electrode;
A first connector portion that overlaps and electrically connects to one end portion of the first lead-out wiring at a side edge portion of the first substrate where one end portion serving as a connection terminal of the first lead-out wiring is disposed; The touch panel as set forth in claim 1, further comprising a flexible wiring board drawn out from a side of the first planar body. The electrode layer has a first electrode patterned on one surface of the first substrate, a first planar body having a first lead wire electrically connected to the first electrode, and one surface of the second substrate. And a second planar body having a second electrode patterned and a second lead wiring electrically connected to the second electrode,
A first connector portion that overlaps and is electrically connected to one end portion of the first lead wiring at a side edge portion of the first substrate where one end portion serving as a connection terminal of the first lead wiring is disposed; A second connector portion that overlaps and electrically connects to one end portion of the second lead-out wiring at a side edge portion of the second substrate on which one end portion serving as a connection terminal of the second lead-out wiring is disposed; The touch panel according to claim 1, further comprising a flexible wiring board drawn out from a side of the electrode layer.   The touch panel according to claim 3, wherein the first substrate and the second substrate are formed of an optical isotropic film. The touch panel according to any one of claims 1 to 4, wherein a touch position is detected based on a change in capacitance between the electrode layer and a human body.

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