JP2014229136A - Touch panel, display device and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch panel that attains thinness and reduced weight in a touch panel provided with a low-resistance mesh-like electrode.SOLUTION: A touch panel 1 comprises: a substrate 2; and a plurality of first electrodes 3 and a plurality of second electrodes 4 that are arranged in an X-direction and a Y-direction on one surface S side of the substrate 2. The first electrode 3 is formed of a plurality of first electrode cells 30 formed by causing a plurality of conductor lines L to intersect, and a connection conductor line 31 electrically connecting the conductor lines L of adjacent first electrode cells 30 to each other. The second electrode 4 is formed of a plurality of second electrode cells 40 formed by causing the plurality of conductor lines L to intersect and a connection transparent conductive film 41 electrically connecting the conductor lines L of adjacent second electrode cells 40 to each other. The connection conductor line 31 and the connection transparent conductive film 41 are insulated via an insulation layer 7. Over or below the first electrode cell 3 and the second electrode cell 4, a first transparent film 8 and a second transparent film 9 are overlapped with each other.

Description

  The present invention relates to a capacitive transparent touch panel, a display device including the touch panel, and an electronic device including the display device.

  2. Description of the Related Art In recent years, in computers and electronic devices, development of operations using display on a display without using push buttons has been active. For this operation, a transparent touch panel is arranged on the front surface of the display to detect the touch position. Types of touch panels include a resistance film type, a surface acoustic wave type, an infrared type, and the like, and there is also a capacitance type that detects a position by a change in capacitance due to a finger touch or proximity. For example, Patent Document 1 describes a capacitive touch switch having matrix electrodes (two-layer structure in the X direction and the Y direction).

  A conventional capacitive touch panel includes a first planar body in which a transparent first electrode made of ITO or the like patterned in a strip shape is formed on one surface of a substrate, and an ITO patterned in a strip shape on one surface of the substrate. And a second planar body on which a transparent second electrode is formed, and the two-sided body is bonded via an adhesive layer so that the first electrode and the second electrode face each other. Has been. However, ITO has a high resistivity, and is generally 200Ω / □ to 1000Ω / □. In particular, in a large-sized touch panel, the resistance value between the terminals of the electrodes increases, and the sensitivity of capacitance detection decreases accordingly, which may make it difficult to operate as a touch panel.

  Therefore, a capacitive touch panel that does not use ITO has been proposed (see, for example, Patent Document 2). In the touch panel of Patent Document 2, the electrode is formed by forming a metal wire made of copper or a copper alloy in a mesh shape, so that the transmittance of the electrode is 70% or more, and low resistance is maintained while maintaining visibility. The electrode is formed.

JP-T-2006-511879 JP 2006-344163 A

  However, in the touch panel of Patent Document 2, a first planar body in which a mesh-like first electrode is formed on one surface of a substrate and a second planar shape in which a mesh-like second electrode is formed on one surface of the substrate. Since the structure is formed by superimposing the body, the thickness of the entire touch panel is increased. In recent years, the touch panel is required to be thin and light, but the touch panel of Patent Document 2 has a problem that it is disadvantageous for the requirement for lightness and thinness.

  The present invention has been made paying attention to the above problem, and an object of the present invention is to provide a touch panel that is thin and lightweight in a touch panel including a low-resistance mesh-like electrode. It is another object of the present invention to provide a display device including the touch panel and an electronic device including the display device.

  The object of the present invention is to provide a substrate, a plurality of first electrodes arranged at intervals in a first direction on one side of the substrate, and a first direction intersecting with the first direction on one side of the substrate. A plurality of second electrodes arranged at intervals in two directions, wherein the first electrode includes a plurality of first electrode cells formed by intersecting a plurality of conductor lines; And at least one connecting conductor wire that electrically connects the conductor wires of the adjacent first electrode cells, and the second electrode is formed by crossing a plurality of conductor wires A plurality of second electrode cells and a transparent conductive film for connection that electrically connects the conductor lines of the adjacent second electrode cells, and between the connection conductive line and the transparent conductive film for connection Insulating the connection conductor wire from the connection transparent conductive film That an insulating layer is achieved by the first electrode cell and the second first transparent film and the second transparent layer and further comprising a touch panel is superimposed respectively above or below the electrode cell.

  In the touch panel having the above structure, it is preferable that the first transparent film and the second transparent film are made of the same material as the transparent conductive film for connection.

  The second transparent film is preferably formed integrally with the connection transparent conductive film.

  Further, it is preferable that the first electrode cell and the second electrode cell are electrically connected to the first transparent film and the second transparent film, respectively.

  The first transparent film and the second transparent film are formed in an uneven shape in which at least a part of the periphery facing the second transparent film and the first transparent film adjacent to each other is alternately arranged with convex portions and concave portions. Preferably, at the boundary between the adjacent second transparent film and the first transparent film, the convex portions are arranged between the convex portions of the adjacent transparent films at a predetermined interval.

  Further, it is preferable that the connecting conductor wire forms a mesh.

  Moreover, it is preferable that the said 1st electrode and the said 2nd electrode are provided with the cutting part which cut | disconnects the said conductor wire in the range which does not inhibit the electrical conductivity between both ends.

  Moreover, it is preferable that the retardation of the said board | substrate is 0 nm-800 nm.

  The above object of the present invention is also achieved by a display device including the touch panel having the above configuration.

  The above object of the present invention is also achieved by an electronic apparatus including the display device having the above structure.

  According to the present invention, since the mesh-like electrode is formed by intersecting a plurality of conductor lines, the resistance of the electrode pattern formed on the substrate can be reduced. Furthermore, since the electrode pattern is not conspicuous, the color difference can be reduced, and the visibility of the touch panel can be improved, so that it can be suitably used as a capacitive touch panel. In addition, since both the first electrode and the second electrode are formed on one surface of the substrate, there is an advantage that the structure of the touch panel can be simplified and the overall thickness and weight can be reduced.

It is a top view of the touch panel concerning one embodiment of the present invention. It is a schematic sectional drawing which expands and shows the connection part of the 1st electrode cell of the touch panel shown in FIG. It is a schematic sectional drawing which expands and shows the connection part of the 2nd electrode cell of the touch panel shown in FIG. It is a top view which expands and shows the boundary of a 1st electrode cell and a 2nd electrode cell (a part of conductor lines of a 1st electrode cell and a 2nd electrode cell are abbreviate | omitted). It is a top view which expands and shows the boundary of the 1st electrode cell and 2nd electrode cell in the manufacture process of the touch panel shown in FIG. 1 (a part of conductor lines of the 1st electrode cell and the 2nd electrode cell are abbreviate | omitted). FIG. 6 is a plan view enlarging the boundary between the first electrode cell and the second electrode cell in the manufacturing process of the touch panel shown in FIG. 1 following FIG. 5 (part of the conductor lines of the first electrode cell and the second electrode cell). (Omitted). FIG. 7 is an enlarged plan view showing the boundary between the first electrode cell and the second electrode cell in the manufacturing process of the touch panel shown in FIG. 1 (part of the conductor lines of the first electrode cell and the second electrode cell continued from FIG. 6); (Omitted). It is a top view which expands and shows the boundary of the 1st electrode cell and the 2nd electrode cell in the touch panel concerning other embodiments of the present invention (a part of conductor lines of the 1st electrode cell and the 2nd electrode cell are omitted). . It is a top view which expands and shows other examples of the conductor line of the 1st electrode cell and the 2nd electrode cell (a part of conductor lines of the 1st electrode cell and the 2nd electrode cell are omitted). It is a top view which expands and shows other examples of the conductor line of the 1st electrode cell and the 2nd electrode cell (a part of conductor lines of the 1st electrode cell and the 2nd electrode cell are omitted). It is a top view which expands and shows the boundary of the 1st electrode cell and the 2nd electrode cell in the touch panel concerning other embodiments of the present invention (a part of conductor lines of the 1st electrode cell and the 2nd electrode cell are omitted). . It is a schematic sectional drawing of a display apparatus with a touch panel function.

  Hereinafter, actual forms 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.

  FIG. 1 is a plan view of a touch panel 1 according to an embodiment of the present invention. 2 and 3 are schematic cross-sectional views showing an enlarged part of the touch panel 1 of FIG. The touch panel 1 according to the present embodiment is a capacitive touch panel, and includes a transparent substrate 2, a plurality of strip-shaped first electrodes 3 and a plurality of strip-shaped second electrodes provided on the one surface S side of the substrate 2. The electrode 4, the insulating layer 7 provided at the intersection of the first electrode cell 3 and the second electrode 4, and the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4 are respectively overlapped above or below. The first transparent film 8 and the second transparent film 9 are provided. The first electrodes 3 are arranged at a predetermined interval in the first direction (X direction) of the one surface S of the substrate 2, and the adjacent first electrodes 3 are electrically insulated. On the other hand, the second electrode 4 is arranged at a predetermined interval in a second direction (Y direction) perpendicularly intersecting the first direction (X direction) of the one surface S of the substrate 2, and is adjacent to the second electrode 4. The electrodes 4 are electrically insulated. Linear wirings 5 and 6 are connected to each first electrode 3 and each second electrode 4. Each of the wirings 5 and 6 is wired so as to extend to the edge of the substrate 2, and its tip is connected to a capacitance detection circuit (not shown). Each of the wires 5 and 6 is preferably low resistance in consideration of the distance and width. In the present embodiment, the first direction (X direction) and the second direction (Y direction) are orthogonal to each other, but the first electrode 3 and the second electrode 4 on the one surface S of the substrate 2 at an angle that is not orthogonal. Can also be arranged.

  The substrate 2 is a dielectric substrate. Examples of the material of the substrate 2 include transparent materials such as glass, polyester, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyethylene naphthalate. If it is glass, the thickness is preferably about 0.1 mm to 3 mm, and if it is a plastic film, the thickness is preferably about 10 μm to 2000 μm. Further, these materials may be laminated in multiple layers. Further, a hard coat layer for surface protection, a functional layer such as an antireflection layer, an antifouling layer, an antiblocking layer, and a receiving layer may be provided on the surface of the substrate 2, or plasma treatment may be performed. .

  As shown in FIGS. 1 to 4, the first electrode 3 includes a plurality of first electrode cells 30 and connection conductor lines 31 that electrically connect the adjacent first electrode cells 30. The second electrode 4 includes a plurality of second electrode cells 40 and a connecting transparent conductive film 41 that electrically connects the adjacent second electrode cells 40.

  The plurality of first electrode cells 30 are arranged at equal intervals in the second direction (Y direction) of the one surface S of the substrate 2. The first electrode cell 30 is formed in a mesh shape by intersecting a plurality of conductor lines L, and has a shape in which a plurality of lattices K are combined. The lattice K has a square shape in the illustrated example. The line width of the conductor line L constituting the first electrode cell 30 is, for example, about 1 μm to 50 μm, preferably about 1 μm to 25 μm, and more preferably about 1 μm to 10 μm. The pitch of the conductor lines L is, for example, about 100 μm to 1000 μm. Moreover, the thickness of the conductor line L is about 0.01 micrometer-10 micrometers, for example, More preferably, it is about 0.05 micrometer-5 micrometers. The first electrode cell 30 having such dimensions is hardly noticeable because the line width of the conductor line L is very thin and the pitch with respect to the line width is sufficiently large.

  The plurality of second electrode cells 40 are arranged at equal intervals in the first direction (X direction) of the one surface S of the substrate 2. The external shapes of the first electrode cell 30 and the second electrode cell 40 are rhombic in the present embodiment, and the second electrode cell 40 does not overlap the first electrode cell 30 provided on the one surface S of the substrate 2. As described above, the first electrode cell 30 is provided so as to fill a vacant space where there is no such electrode. Thereby, the one surface S of the substrate 2 is in a state in which the plurality of first electrode cells 30 and the plurality of second electrode cells 40 are spread. Similarly to the first electrode cell 30, the second electrode cell 40 is formed in a mesh shape by intersecting a plurality of conductor lines L, and the conductor line L and the conductor line L constituting the first electrode cell 30 Are wired with a gap so that they are not connected. The conductor line L constituting the second electrode cell 40 has the same line width, pitch and thickness as the conductor line L constituting the first electrode cell 30, and the second electrode cell 40 is the same as the first electrode cell 30. This is a shape in which a plurality of shaped lattices K are combined. The second electrode cell 40 may be formed of the same material as the first electrode cell 30 or a different material. However, the second electrode cell 40 may be integrally formed on the one surface S of the substrate 2 with the same material as the first electrode cell 30. It is preferable to form the second electrode cell 40 because the second electrode cell 40 can be efficiently formed.

  The connecting conductor line 31 is a line-shaped conductor that connects the conductor lines L of the adjacent first electrode cells 30 to each other, and one or a plurality of connecting conductor lines 31 are provided between the adjacent first electrode cells 30. The shape of the connecting conductor wire 31 may be a linear shape extending in one direction, or may be a shape bent at one place or a plurality of places (L shape, zigzag shape, etc.). The conductor line 31 faces in the same direction (U direction or V direction) as the conductor line L of the first electrode cell 30 when extending linearly, and is linear when bent. The component part 31A extending in the direction of the conductor line L faces the same direction (U direction or V direction) as the conductor line L. In addition, the connecting conductor line 31 (the constituent part 31A that extends linearly when the connecting conductor line 31 is bent) is positioned on the extension of one of the conductor lines L of the first electrode cell 30. Thus, it is preferable that the conductor wire L and one line are formed. The connecting conductor line 31 may be formed of the same material as or different from the conductor line L of the first electrode cell 30, but is integrally formed on the one surface S of the substrate 2 with the same material as the conductor line L. It is preferable to form the connection conductor wire 31 because the connection conductor wire 31 can be efficiently formed.

  In the present embodiment, a plurality of connection conductor lines 31 are provided between adjacent first electrode cells 30 so that the plurality of connection conductor lines 31 form a mesh in which a plurality of lattices K are combined. Wired. That is, a plurality of lattices K having the same shape as the lattices K constituting the surrounding first electrode cell 30 and second electrode cell 40 are uniformly arranged at the intersection of the first electrode 3 and the second electrode 4. The As a result, on the one surface S of the substrate 2, a mesh pattern having a uniform appearance as a whole is formed by the conductor lines L and the connection conductor lines 31 of the first electrode cell 30 and the second electrode cell 40. As a result, the pattern shapes of the first electrode 3 and the second electrode 4 can be made inconspicuous, and the visibility of the touch panel 1 can be improved.

  Furthermore, in this embodiment, as shown in FIG. 4, among the four sides of the first electrode cell 30, a conductor facing the second electrode cell 40 facing the side facing the second electrode cell 40. A plurality of overhanging lines 32 with overhanging lines L are provided, and among the four sides of the second electrode cell 30, the side facing the first electrode cell 30 is also opposed to the first electrode cell 30. A plurality of overhanging wires 42 with the conductor wires L overhanging are provided. These overhang lines 32 and 42 do not necessarily have to be staggered, but it is preferable that they are alternately provided as shown in FIG. 4 because the gap O is less noticeable. These overhang lines 32 and 42 form a grid K with the conductor lines L of the first electrode cell 30 and the second electrode cell 40, so that the gap between the first electrode cell 30 and the second electrode cell 40 is a grid. Filled with K. As a result, the gap between the first electrode cell 30 and the second electrode cell 40 becomes inconspicuous, and a more precise network pattern is formed on the one surface S of the substrate 2, so that the visibility of the touch panel 1 is further increased. Can be improved.

  In the above description, the mesh shape means that the conductor wire L and the connecting conductor wire 31 intersect with each other so as to have an intersection, and at least one of the wires intersects with each other. This includes the fact that the lines do not have an intersection because they are intermittent, but intersect.

  A gap O is formed between the connecting conductor line 31 and the conductor line L of the second electrode cell 40 so that they are not electrically connected. In FIG. 4, the gap O is depicted to be large for the sake of explanation, but it is preferable to reduce the gap O from the viewpoint of visibility. Further, if the wiring pattern of the connecting conductor line 31 is formed so that the gap O between the connecting conductor line 31 and the conductor line L of the second electrode cell 40 appears together, the gap O is concentrated and becomes conspicuous. This adversely affects the visibility of the touch panel 1. Accordingly, the gap O between the connection conductor line 31 and the conductor line L of the second electrode cell 40 is not concentrated, and the conductor line L and the connection of the second electrode cell 40 appear so as to be somewhat inconspicuous. It is preferable to set a wiring pattern such as the conductor wire 31 for use.

  An insulating layer 7 is provided on the one surface S side of the substrate 2 so as to cover at least a part of the connecting conductor wire 31. The insulating layer 7 is not particularly limited as long as it is an insulating material that is transparent and non-conductive. Higher ones are desired, and general thermosetting transparent resins such as epoxy and acrylic resins, and photocurable transparent resins can be used. The insulating layer 7 can be formed by applying such a transparent resin so as to cover the connection conductor wire 31 by a known coating method, screen printing method, ink jet printing method, or the like. Further, the insulating layer 7 can be formed using an inorganic insulating material such as silicon oxide by a PVD method such as a sputtering method, a vacuum evaporation method, or an ion plating method, a CVD method, or the like. In addition, the insulating layer 7 can also be formed by sticking a transparent film of polyester resin or the like on the one surface S of the substrate 2 so as to cover at least the connecting conductor wire 31. The thickness of the insulating layer 7 is not particularly limited, and can be, for example, about 0.1 μm to 50 μm. In addition, the outer shape of the insulating layer 7 is rectangular in FIG. 4, but is not limited thereto, and may be various shapes such as a polygonal shape and a circular shape.

  The connecting transparent conductive film 41 is shorter than the insulating layer 7 but longer in length, and electrically connects the conductor lines L of the adjacent second electrode cells 40 so as to cross the upper surface of the insulating layer 7. Connected. Therefore, the connecting conductor line 31 and the connecting transparent conductive film 41 are insulated from each other when they intersect on the one surface S of the substrate 2 by disposing the insulating layer 7 therebetween. Since the transparent conductive film 41 for connection and the insulating layer 7 are transparent, the first electrode formed below the transparent conductive film 41 for connection and the insulating layer 7 when the touch panel 1 is viewed from above or below. The mesh shape of the connecting conductor wire 31 at the intersection of the third and second electrodes 4 can be confirmed.

  Examples of the material of the transparent conductive film 41 for connection 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, and zinc oxide. -Transparent conductive materials such as tin oxide, indium oxide-tin oxide, zinc oxide-indium oxide-magnesium oxide, zinc oxide, tin oxide film, or metal materials such as tin, copper, aluminum, nickel, chromium, Metal oxide materials can be exemplified, and two or more of these may be formed in combination. In addition, connecting ultrafine conductive carbon fibers such as carbon nanotubes, carbon nanohorns, carbon nanowires, carbon nanofibers and graphite fibrils, or composite materials in which ultrafine conductive fibers such as Ag nanowires are dispersed in a polymer material that functions as a binder It can also be used as a material for the transparent conductive film 41 for use. 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. Examples of the method for forming the transparent conductive film 41 for connection include PVD methods such as sputtering, vacuum deposition, and ion plating, CVD, coating, and printing. The thickness of the connecting transparent conductive film 41 varies depending on the material and the forming method, but is preferably 50 μm or less and more preferably 10 μm or less when a coating method or a printing method is used.

  On the one surface S side of the substrate 2, a transparent first transparent film 8 and a second transparent film 9 are superimposed above or below the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, respectively. It is provided as such. In the present embodiment, the first electrode cell 30 is covered from above with the first transparent film 8, and the second electrode cell 40 is covered from above with the second transparent film 9. The first transparent film 8 and the second transparent film 9 are formed in a rhombus shape so as to match the outer shapes of the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4. Note that the first transparent film 8 and the second transparent film 9 do not necessarily coincide with the outer shapes of the first electrode cell 30 and the second electrode cell 40 and exactly cover the entire surfaces of the first electrode cell 30 and the second electrode cell 40. It is not necessary for the first electrode cell 30 and the second electrode cell 40 to substantially cover the entire surface. In this way, by overlapping the first transparent film 8 and the second transparent film 9 on the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, the one surface S of the substrate 2 is overlapped. Almost the entire surface of the mesh pattern formed by the upper electrode cells 30 and 40 and the connecting conductor line 31 is overlaid with a transparent film (the connecting transparent conductive film 41 or the transparent film 8).

  When comprised in this way, when each touch panel 1 is visually observed compared with the case where each electrode cell 30 and 40 of the 1st electrode 3 and the 2nd electrode 4 is not piled up by the 1st transparent film 8 and the 2nd transparent film 9. Can be made uniform. That is, when the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4 are not overlapped with the first transparent film 8 and the second transparent film 9, the first electrode 3 and the second electrode 4 are There is a difference in color (light transmittance) between the portion where the transparent conductive film for connection 41 is provided (intersection portion) and the portion where the transparent conductive film 41 is not provided (electrode cell portion), which affects the visibility of the touch panel 1. There is a fear. On the other hand, regarding the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, the first transparent film 8 and the second transparent film 9 are overlapped, so that the difference in color is visually observed on the entire touch panel 1. Since it becomes almost impossible to distinguish, the visibility of the touch panel 1 can be further improved. In FIG. 4 (and FIGS. 7 to 11), the outline of the transparent conductive film 41 is displayed so that the transparent conductive film 41 and the second transparent film 9 can be identified on the drawing. The outline of the transparent conductive film 41 does not appear clearly as shown in the drawing. If the transparent conductive film 41 is formed integrally with the second transparent film 9, the outline of the transparent conductive film 41 does not appear.

  The first transparent film 8 and the second transparent film 9 are not particularly limited as long as they are transparent materials, and may be formed of the same material as the connection transparent conductive film 41 or a different material. However, the first transparent film 8 and the second transparent film 9 can be efficiently formed by simultaneously forming on the one surface S of the substrate 2 using the same conductive material as the transparent conductive film 41 for connection. In this case, connecting the second transparent film 9 covering the second electrode cell 40 with the connecting transparent conductive film 41 is preferable from the viewpoint of improving the appearance. In addition, the first transparent film 8 covering the first electrode cell 30 is provided with a gap, for example, in order to insulate it from the connecting transparent conductive film 41 or to have a high resistance state close to an insulating state. .

  In addition, when the touch panel 1 is manufactured, if there is a disconnected portion in the conductor line L constituting each of the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4, resistance is generated by the disconnected portion, and the resistance value of the electrode is reduced. Although it increases, since the first transparent film 8 and the second transparent film 9 are made of a conductive material and are electrically connected to the first electrode cell 3 and the second electrode cell 4, respectively, the influence of the increase in the resistance value. Can be suppressed. In addition, even when a part of the line width of the conductor line L constituting the electrode cells 30 and 40 of the first electrode 3 and the second electrode 4 becomes thin, an increase in the resistance value of the electrode can be suppressed. .

  Next, a method for manufacturing the touch panel 1 having the above configuration will be described. First, as shown in FIG. 5, the conductor line L and the connecting conductor line 31 of the first electrode cell 30 and the second electrode cell 40 are formed on the one surface S of the substrate 2. The substrate 2 is cut into a desired shape as necessary. The method of forming the conductor wire L and the connecting conductor wire 31 is as follows: (1) Screen printing of a conductive paste containing ultrafine conductive particles such as silver, gold, platinum, palladium, copper, carbon, etc. on the substrate 2 (See Japanese Patent Laid-Open No. 2007-142334), (2) A method of etching a metal foil after forming a resist pattern on the metal foil after laminating a metal foil such as copper on the substrate 2 (Japanese Patent Laid-Open No. 2008-32884 etc.) Reference). Moreover, the formation method of the conductor wire L and the connection conductor wire 31 is not limited to the formation method of said (1) and (2), Well-known printing methods, such as gravure printing other than said (1), and inkjet printing, Photolithography other than the above (2) may be used. Further, the wirings 5 and 6 may be formed by the above-described method together with the conductor line L and the connection conductor line 31, or after the conductor line L and the connection conductor line 31 are formed, the conductive for wiring printing is formed. The ink may be formed by printing on one surface S of the substrate 2 using a known printing method such as screen printing.

  Then, as shown in FIG. 6, after the insulating layer 7 is provided so as to cover at least a part of the connecting conductor line 31 on the one surface S of the substrate 2, the connecting transparent conductive film is formed on the upper surface of the insulating layer 7. At the same time as forming 41, the first transparent film 8 and the second transparent film 9 are formed on the first electrode cell 30 and the second electrode cell 40, thereby forming the touch panel 1 shown in FIG. 4. In addition, as shown in FIG. 7, after forming the transparent conductive film 41 for connection on the upper surface of the insulating layer 7 at one end, the first transparent film 8 and the second transparent film are formed on the first electrode cell 30 and the second electrode cell 40. The touch panel 1 shown in FIG. 4 may be formed by forming the film 9.

  In the touch panel 1 having the above configuration, the method for detecting the touch position is the same as that of the conventional capacitive touch panel, and the capacitance of the human body at the contact position of the first electrode cell 30 and the second electrode cell 40 is determined. By detecting a change in voltage or the like based on the coordinates, the coordinates of the contact position are calculated.

  In the touch panel 1 according to the present embodiment, since the mesh-like electrodes 3 and 4 are formed by crossing a plurality of conductor lines L, the resistance of the electrode pattern formed on the substrate 2 is reduced. Can do. Furthermore, since the electrode pattern is not conspicuous and a sense of incongruity due to the difference in color does not occur, the visibility of the touch panel 1 can be improved, and therefore it can be suitably used as a capacitive touch panel. Further, since both the first electrode 3 and the second electrode 4 are formed on the one surface S of the substrate 2, the structure of the touch panel 1 can be simplified and the overall thickness and weight can be reduced. Have sex.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. For example, in the embodiment described above, a linear gap is formed between the adjacent first transparent film 8 and the second transparent film 9, but as shown in FIG. A plurality of convex portions 80 extending in the surface direction, that is, outward from the peripheral edge, are arranged at predetermined intervals on the peripheral edge of at least a portion of the peripheral edge facing the adjacent second transparent film 9, and the second A plurality of protrusions 90 extending in the surface direction, that is, from the periphery toward the outside, are arranged at predetermined intervals on the periphery of the portion of the periphery of the transparent film 9 facing at least the adjacent first transparent film 8. Thus, it is possible to form irregularities in which the convex portions 80 and 90 and the concave portions 81 and 91 are alternately arranged. Then, at the boundary between the adjacent first transparent film 8 and the second transparent film 9, the concave portions 91, 81 between the convex portions 90, 80 that face the convex portions 80, 90 so as to leave a slight gap therebetween. And the convex portions 80 and 90 and the concave portions 81 and 91 are engaged with each other, so that the gap between the adjacent first transparent film 8 and the second transparent film 9 can be filled with the transparent films 8 and 9. If comprised in this way, compared with the case where a linear clearance gap is formed between the 1st transparent film 8 and the 2nd transparent film 9 which adjoin, the whole touch panel 1 is transparent film (1st more precisely). Since it can be covered with the transparent film 8, the second transparent film 9, and the transparent conductive film for connection 41) and the area not covered with the transparent film can be reduced and the difference in color can be eliminated, the visual recognition of the touch panel 1 The property can be further improved. The protrusions 80 and 90 are located on the extension lines 32 and 42 of the first electrode cell 30 and the second electrode cell 40, and the extension lines 32 and 42 are the protrusions 80 and 90. It is preferable to provide the first transparent film 8 and the second transparent film 9 so as to be completely covered by 90. Moreover, the shape of the convex portions 80 and 90 and the concave portions 81 and 91 is not only the rectangular shape as described above, but also a triangular shape with sharply pointed tips (the entire concave-convex shape is a sawtooth shape such as a saw tooth). Further, various shapes such as a mountain shape with a rounded tip (a wave shape as the overall uneven shape) can be used.

  Moreover, in the said embodiment, although the line width of the conductor line L of the 1st electrode cell 30 and the 2nd electrode cell 40 and the line width of the connection conductor line 31 are formed, the connection conductor line The line width 31 may be different from the line width of the conductor line L of the first electrode cell 30 and the second electrode cell 40.

  Further, when the line width of the connecting conductor line 31 is formed to be thicker or narrower than the line width of the conductor line L of the first electrode cell 30 and the second electrode cell 40, the first electrode cell 30 and the second electrode cell 40. The line width of at least a part (location) of the conductor line L may be as thick or narrow as the line width of the connecting conductor line 31. As a result, it is possible to make the appearance of the electrode more evenly conspicuous by improving the visibility of the touch panel 1 since the appearance of the electrode can be made more uniform by uniformly arranging the portions where the line width is thick or thin. Can be made. In addition, although the line width of the conductor line L of the 1st electrode cell 30 and the line width of the conductor line L of the 2nd electrode cell 40 may not be exactly the same, it is substantially equal line width from a viewpoint of the uniformity of appearance. It is desirable to do.

  Moreover, in the said embodiment, after forming the conductor wire L and the connection conductor wire 31 of the 1st electrode cell 30 and the 2nd electrode cell 40 on the one surface S of the board | substrate 2, the insulating layer 7 was provided, Furthermore, the transparent conductive film 41 for connection, the 1st transparent film 8, and the 2nd transparent film 9 are provided. Without being limited thereto, the connection transparent conductive film 41, the first transparent film 8, and the second transparent film 9 are provided on the one surface S of the substrate 2, and then the insulating layer 7 is formed on the connection transparent conductive film 41. The first electrode cell so that the connection conductor line 31 is located on the insulating layer 7 and the conductor lines L of the adjacent second electrode cells 40 are electrically connected by the connection transparent conductive film 41. 30 and the conductor line L of the second electrode cell 40 and the connecting conductor line 31 may be formed. In this case, the first transparent film 8 and the second transparent film 9 are overlaid in a state of being laid under the first electrode cell 3 and the second electrode cell 4, respectively.

  Moreover, in the said embodiment, although the conductor wire L and the connection conductor wire 31 of the 1st electrode cell 30 and the 2nd electrode cell 40 are straight straight lines, as shown in FIG. Various shapes such as a wave shape and a sawtooth shape like a saw tooth as shown in FIG. 10 can be used.

  Moreover, in the said embodiment, although the external shape of the 1st electrode cell 30 and the 2nd electrode cell 40 is a rhombus shape, insulation is ensured between the 1st electrode cell 30 and the 2nd electrode cell 40, and a finger As long as a contact point such as can be detected, the shape is not limited to a diamond shape, and may be an arbitrary shape such as a rectangular shape, a polygonal shape, or a circular shape.

  Moreover, in the said embodiment, as shown in FIG. 11 with respect to the some conductor wire L which comprises each electrode cell 30 and 40 in the range which does not inhibit the electrical conductivity between the both ends of each electrode 3 and 4. As shown in FIG. The cutting portions 33 and 43 for cutting the conductor line L may be partially provided. As described above, since the gap O is formed between the connecting conductor line 31 and the conductor line L of the second electrode cell 40, such cut portions 33 and 43 are formed in the electrode cells 30 and 40, respectively. By providing, the intermittent part (blank part) which the conductor wire L interrupts | blocks uniformly with respect to the whole electrode pattern generate | occur | produces. Therefore, the light transmittance is improved and the appearance of the electrode pattern can be made more uniform, so that the visibility can be further improved.

  Further, by forming a dummy pattern electrically independent of the electrode pattern in the gap between the first electrode cell 30 and the second electrode cell 40, the pattern shape of the first electrode 3 and the second electrode 4 can be further increased. , May not be noticeable. The dummy pattern is a conductor line having a line width substantially equal to the conductor line L of the connection conductor line 31 or the first electrode cell 30 and the second electrode cell 40, and the first electrode cell 30 so as to have a uniform mesh shape. A pattern that complements the gap with the second electrode cell 40 is formed.

  The touch panel of the present invention can be used as a display device with a touch panel in which a touch panel is mounted on a display surface of a display device such as a liquid crystal display, an organic light emitting diode (OLED) display, and an electroluminescent (EL) display.

  In addition, by using an optically isotropic substrate or an optical phase substrate as the substrate 2 of the touch panel 1, a display device with a so-called on-cell type touch panel provided with the touch panel 1 in the configuration of the display device is provided. it can. For example, the on-cell type display device 10 with a touch panel can be exemplified by a configuration including a backlight 11, a liquid crystal display 12, and a touch panel 1, as shown in FIG. The liquid crystal display panel 12 usually has a configuration in which a polarizing plate 13, a TFT element substrate 14, a liquid crystal layer 15, a color filter substrate 16, and a deflecting plate 17 are laminated, but the touch panel 1 is a liquid crystal display panel 12. Are arranged below the polarizing plate 17 on the surface side (upper side in the illustrated example). A backlight 11 is mounted on a polarizing plate 13 on the back side (lower side in the illustrated example) of the liquid crystal display panel 12. A cover film 18 for protection is attached to the surface of the polarizing plate 17.

  The above-mentioned optically isotropic substrate and optical phase-difference substrate preferably have a retardation value of 0 nm to 800 nm, and more preferably 0 nm to 600 nm. Retardation can be measured using, for example, a phase difference measuring device KOBRA-WR manufactured by Oji Scientific Instruments. Examples of the materials for the optically isotropic substrate and the optical phased substrate include aliphatic cyclic polyolefins and norbornene-based thermoplastic transparent resins.

  The display device described above is suitably used for electronic devices that perform touch operations such as mobile phones, smartphones, tablet devices, notebook computers, display-integrated computers, car navigation systems, game devices, and POS terminals.

DESCRIPTION OF SYMBOLS 1 Touch panel 2 Board | substrate 3 1st electrode 4 2nd electrode 7 Insulating layer 8 1st transparent film 9 2nd transparent film 10 Display apparatus with a touch panel function 30 1st electrode cell 31 Conducting wire 33 Cutting part 40 2nd electrode cell 41 Transparent conductive film for connection 43 Cutting part L Conductor wire

Claims (10)

A substrate, a plurality of first electrodes arranged at intervals in a first direction on one side of the substrate, and a second direction intersecting the first direction on one side of the substrate. A plurality of second electrodes arranged, and a touch panel comprising:
The first electrode is for at least one connection for electrically connecting a plurality of first electrode cells formed by crossing a plurality of conductor lines and the conductor lines of the adjacent first electrode cells. A conductor wire,
The second electrode includes a plurality of second electrode cells formed by intersecting a plurality of conductor lines, and a connecting transparent conductive film that electrically connects the conductor lines of the adjacent second electrode cells. Consists of
An insulating layer interposed between the connection conductor wire and the connection transparent conductive film to insulate the connection conductor wire and the connection transparent conductive film;
A touch panel further comprising: a first transparent film and a second transparent film that are overlaid above or below the first electrode cell and the second electrode cell, respectively.   The touch panel according to claim 1, wherein the first transparent film and the second transparent film are made of the same material as the transparent conductive film for connection.   The touch panel according to claim 2, wherein the second transparent film is formed integrally with the connection transparent conductive film.   The touch panel according to claim 2, wherein the first electrode cell and the second electrode cell are electrically connected to the first transparent film and the second transparent film, respectively.   The first transparent film and the second transparent film are formed in an uneven shape in which at least a part of the periphery facing the second transparent film and the first transparent film adjacent to each other is alternately arranged with convex portions and concave portions. And at the boundary between the adjacent second transparent film and the first transparent film, the convex portions are disposed between the convex portions of the adjacent transparent films at a predetermined interval. The touch panel in any one.   The touch panel according to claim 1, wherein the connection conductor wire forms a mesh.   The touch panel according to claim 1, wherein each of the first electrode and the second electrode includes a cutting portion that cuts the conductor wire within a range that does not impair conductivity between both end portions.   The retardation of the said board | substrate is 0 nm-800 nm, The touchscreen in any one of Claims 1-7.   A display device comprising the touch panel according to claim 1.   An electronic apparatus comprising the display device according to claim 9.