JP6636717B2 - Conductive film, touch panel, and display device - Google Patents

Description

  The present invention relates to a conductive film including a plurality of electrode wires, a touch panel including the conductive film, and a display including the touch panel.

  In recent years, touch panels have been widely used as input devices for display devices. The display device includes a display panel that displays an image, and the touch panel that is superimposed on the display panel. The size of the display surface of the display panel ranges from a small display device such as a PDA (Personal Digital Assistant) or a mobile phone to a large display device such as a display used for a personal computer or a smart TV. Until the case, it varies depending on the size of the display device. Therefore, the size of the touch panel having the operation surface of the same size as the size of the display surface also varies. Further, the resolution of the display panel also varies depending on the use of the display device.

  As a method of detecting a contact position of a finger or the like on a touch panel, a capacitance method of detecting contact of a finger or the like with an operation surface as a change in capacitance is widely used. In the capacitive touch panel, the conductive film included in the touch panel includes a plurality of first electrodes extending along a first direction, a plurality of second electrodes extending along a second direction orthogonal to the first direction, A transparent dielectric layer sandwiched between the first electrode and the second electrode; Then, a change in capacitance between one first electrode and each of the plurality of second electrodes is detected for each first electrode, and a contact position of a finger or the like on the operation surface is detected.

  In one example of such a conductive film, each of the plurality of first electrodes includes a plurality of first electrode lines extending along the first direction, and each of the plurality of second electrodes extends along the second direction. It is composed of a plurality of second electrode lines. As the electrode wire, a thin wire made of a metal such as silver or copper is used. By using metal as the material of the electrode wires, quick response and high resolution can be obtained when detecting the contact position, and the touch panel can be made larger and the manufacturing cost can be reduced.

  By the way, in a configuration in which the electrode lines are formed of a metal that absorbs or reflects visible light, a plurality of first electrode lines and a plurality of second electrode lines are orthogonal to each other when viewed from the operation surface of the touch panel. The shape of the pattern is visually recognized. On the other hand, even in a display panel on which a touch panel is stacked, a black matrix that partitions a plurality of pixels along the first direction and the second direction is visually recognized as a lattice pattern.

  At this time, the interval between the first electrode lines adjacent to each other is generally different from the interval in the second direction between the pixels adjacent to each other, and the interval between the second electrode lines adjacent to each other is also different. Is different from the interval in the first direction between mutually adjacent pixels. Then, when viewed from the operation surface of the touch panel, the lattice-shaped periodic structure formed by the first electrode lines and the second electrode lines and the lattice-shaped periodic structure that divides the pixels are overlapped to form two periodic structures. Misalignment may induce moire. When moiré is visually recognized, the quality of an image visually recognized on the display device is reduced.

As one method of suppressing such moiré from being visually recognized, there is a method of suppressing the occurrence of moiré by breaking the periodicity of the periodic structure of the electrode wires.
For example, in the touch panel described in Patent Document 1, each of the first electrode line and the second electrode line is a broken line, and the periodic structure formed from these electrode lines has a polygonal repeating structure different from a rectangle. Have. As a result, the periodicity of the periodic structure of the electrode wires is broken as compared with the periodic structure of the lattice. Further, for example, in the conductive film described in Patent Literature 2, the electrode lines have partially different line widths, so that the periodicity of the periodic structure of the electrode lines is broken as compared with the case where the line width is constant. I have. Further, for example, in the conductive film described in Patent Literature 3, the periodicity of the periodic structure of the electrode lines is broken because the contours of the electrode lines have random irregularities.

International Publication No. WO 2014/115831 JP 2009-252868 A JP 2010-276998 A

  By the way, as described above, in recent years in which the sizes and resolutions of the display panels have been diversified, in order to reduce the design load of the pattern of the electrode lines, a plurality of display panels having the same size and different resolutions are used. It is desired to apply electrode lines having a common pattern between a plurality of display panels having different sizes and the same resolution.

  On the other hand, the electrode line patterns described in Patent Literatures 1 to 3 have a periodicity that is visually recognizable although the periodicity is reduced, and when these patterns are used, The degree of occurrence of moire varies depending on the relationship between the periodic structure of the electrode lines and the periodic structure of the pixels. Therefore, in order to suppress moire for a plurality of display panels, it is necessary to evaluate the degree of occurrence of moire for each periodic structure of pixels, that is, for each size and resolution of the display panel, and to determine the degree of moire. It is necessary to design. The display panel that can suppress moire by the electrode line pattern designed in this way is, after all, limited to the display panel evaluated at the time of design.

Therefore, there is a demand for a pattern of electrode lines that can suppress the occurrence of moire on various display panels having different sizes and resolutions.
An object of the present invention is to provide a conductive film, a touch panel, and a display device that can suppress the occurrence of moire when being superimposed on a plurality of display panels having different sizes and resolutions.

  A conductive film that solves the above-mentioned problem has a first surface, a transparent dielectric layer having a second surface opposite to the first surface, and a transparent dielectric layer on the first surface of the transparent dielectric layer. And a plurality of electrode lines extending along a first direction and arranged in a first intersecting direction intersecting with the first direction, and the second direction of the transparent dielectric layer in the first direction. A plurality of electrode lines extending along a second direction intersecting and arranged along a second intersecting direction intersecting the second direction, wherein at least one of the plurality of electrode lines located on the first surface is provided. One is a first electrode line, the first electrode line has a plurality of first bent portions and a plurality of second bent portions, and the first bent portion and the second bent portion are the first bent portions. It has a bent line shape alternately arranged one by one along one electrode line, and the first bent portions adjacent to each other are virtually Is a virtual line segment, and the plurality of virtual line segments connected along the first direction constitute a virtual line, and the inclination of the virtual line segment with respect to the first direction is the virtual line. The first electrode line is configured to change irregularly with respect to the order in which the virtual line segments are arranged.

  According to the above configuration, the electrode line pattern includes the first electrode line having a bent line shape that bends irregularly. Therefore, compared to the conventional electrode line pattern composed of regular bent lines, the spatial periodicity of the electrode line pattern is low, and the suppression of moire is reduced to the periodicity of the pixel pattern of the display panel. The effect is also kept low. Therefore, even when a touch panel using a conductive film having such an electrode line pattern is superimposed on a plurality of display panels having different sizes and resolutions, it is possible to suppress moiré from being visually recognized. In comparison, it is possible to suppress the moire from being visually recognized on more various display panels.

  In the above configuration, the first electrode line is a set of a plurality of short line portions having a linear shape connecting the first bent portion and the second bent portion adjacent to each other along the first electrode line, In the plurality of short line portions, the length of the short line portion and the inclination of the short line portion with respect to the first direction may change irregularly with respect to the order in which the short line portions are arranged in the first electrode line. preferable.

According to the above configuration, since the first electrode line is configured by a combination of a plurality of short line portions having irregular lengths and inclinations, a bent line shape that bends irregularly is accurately realized.
The said structure WHEREIN: The said 1st electrode line is comprised so that all of said several short line part may cross or contact one reference line which is a virtual straight line extended along the said 1st direction. Is preferred.

  According to the above configuration, since the first bent portion and the second bent portion are arranged so as to spread in the direction in which the electrode wires are arranged, the degree of bending at the bent line is increased, and an irregular bent line shape is accurately realized. can do.

  In the above configuration, the plurality of electrode lines located on the first surface include the plurality of first electrode lines arranged along the first cross direction, and are arranged for each of the plurality of first electrode lines. Preferably, the reference lines are arranged at predetermined intervals along the one intersecting direction.

According to the above configuration, on the first surface, excessive deviation of the positions of the bending lines and the positions of the bending portions constituting the first electrode wire is suppressed, and the uniformity of the appearance of the conductive film is also enhanced.
In the above configuration, the plurality of electrode lines located on the first surface include a first electrode line group including a plurality of the first electrode lines arranged along the first cross direction, and the first electrode In the line group, it is preferable that a variation in the total number of the first bent portion and the second bent portion between the first electrode lines is 5% or less.

  According to the above configuration, the first electrode lines adjacent to each other are prevented from intersecting or contacting with each other. For this reason, it is possible to prevent the electrode line from being easily recognized due to the electrode line becoming thicker at the intersection formed between the electrode lines or the contact portion.

  In the above configuration, a virtual electrode line having a plurality of first virtual bending parts and a plurality of second virtual bending parts is a reference electrode line, and the first virtual bending part and the second virtual bending part are A plurality of the first virtual bent portions and a plurality of the second virtual bent portions are periodically arranged alternately one by one along the reference electrode line, and are located on separate straight lines extending in the first direction. In the bent line shape of the first electrode wire, the reference bent portion, which is at least one of the first virtual bent portion and the second virtual bent portion, is arranged in an order of the reference bent portion in the reference electrode line. Is preferably irregularly displaced.

According to the above configuration, it is possible to easily create a bent line shape of the first electrode line, that is, a bent line shape that bends irregularly.
In the above configuration, the plurality of electrode lines located on the first surface include the plurality of first electrode lines arranged along the first cross direction, and the plurality of first electrode lines are in the first direction. And a plurality of the reference electrode lines arranged at predetermined intervals in the first intersecting direction, the reference bent portion is irregularly displaced in the order in which the reference bent portions are arranged. A width occupied by each reference electrode line in the first cross direction is a reference width, the predetermined interval is a reference interval, and an occupancy ratio that is a ratio of the reference width to the reference interval is 0. It is preferably from 0.7 to 1.3.

  According to the above configuration, in the power spectrum obtained by the two-dimensional Fourier transform of the pattern composed of the plurality of reference electrode lines, the intensity of the frequency component of the element extending in the direction in which the reference electrode line extends can be suppressed low. When the line pattern and the display panel are superimposed, moire is hardly visually recognized. As a result, in the pattern of the first electrode lines created based on the reference electrode lines, it is further suppressed that the moire is visually recognized when the pattern is overlapped with the display panel.

In the above configuration, it is preferable that an angle formed by a line segment connected through the reference bent portion in the reference electrode line is not less than 95 degrees and not more than 150 degrees.
According to the above configuration, when the angle is equal to or greater than 95 degrees, the number of the bent portions is increased and the ratio of the electrode wires occupying in the first plane is suppressed from becoming excessive. A decrease in transmittance is suppressed. On the other hand, when the angle is 150 degrees or less, the interval between the bent portions is maintained in a range that is not too large, so that it is easy to set the bent line shape of the reference electrode wire to a desired shape in which moire is unlikely to occur. .

  In the above configuration, a distance between two reference bent portions adjacent to each other in the first direction in the reference electrode line is a reference period, and extends in the first direction around the reference bent portion before the displacement. A rhombic virtual region having a diagonal line and a diagonal line extending in the first cross direction is a displacement region, and the reference bent portion after the displacement is located in the displacement region and extends in the first direction. The length of the diagonal is 0.1 to 0.5 times the reference period, and the length of the diagonal extending in the first cross direction is 0.2 to 1.0 times the reference interval. It is preferred that

  According to the above configuration, in the power spectrum obtained by the two-dimensional Fourier transform of the pattern composed of the plurality of first electrode lines created based on the plurality of reference electrode lines, the fundamental spatial frequency intensity can be suppressed low. Therefore, when the pattern of the first electrode line and the display panel are overlapped, moire is more difficult to be visually recognized.

  In the above configuration, in a power spectrum obtained by two-dimensional Fourier transform of the plurality of electrode lines located on the first surface, four directions extending radially from the origin and point-symmetric with respect to the origin are provided. The four directions including two sets of three directions are the periodic directions, and the angle of the first electrode line at the first bent portion, the angle of the first electrode line at the second bent portion, The distance between the first bent portions adjacent to each other, the distance between the second bent portions adjacent to each other, and the plurality of first bent portions so that peaks derived from these periodicities are distributed in a band along each periodic direction. The electrode wires are preferably configured.

According to the above configuration, since the periodicity of the electrode line pattern is suppressed to a low level, it is possible to accurately suppress the occurrence of moire on a plurality of display panels.
In the above configuration, in the power spectrum, the plurality of the first electrode lines may include a plurality of the first electrode lines such that a peak stronger than a peak derived from the periodicity only in the first intersecting direction is included in the band shape. It is preferable that one electrode wire is formed.

According to the above configuration, since the periodicity in the first cross direction is suppressed low in the electrode line pattern, the occurrence of moire on a plurality of display panels is accurately suppressed.
In the above configuration, at least one of the plurality of electrode wires located on the second surface is a second electrode wire, and the second electrode wire has a plurality of first bent portions and a plurality of second bent portions. Having a bent line shape in which the first bent portion and the second bent portion are alternately arranged one by one along the second electrode line, and the first bent portion and the second bent portion adjacent to each other at the second electrode line A line segment that virtually connects the one bent portion is a virtual line segment, and the plurality of virtual line segments that are continuous along the second direction constitute a virtual line, and the second electrode line is a virtual line segment. It is preferable that the inclination of the line segment in the second direction is irregularly changed with respect to the order in which the virtual line segments are arranged in the virtual line.

  According to the above configuration, in addition to the plurality of electrode lines located on the first surface, the plurality of electrode lines located on the second surface also include a bent line-shaped electrode line that bends irregularly. The periodicity of the line pattern is further reduced. Therefore, it is possible to prevent the moire from being visually recognized on various display panels.

In the above configuration, it is preferable that the plurality of electrode lines located on the first surface and the plurality of electrode lines located on the second surface are formed on different base materials.
According to the above configuration, formation of the electrode wires is easier than in a configuration in which the electrode wires are formed on both surfaces of one base material.

In the above configuration, it is preferable that the first direction and the second direction are orthogonal to each other.
According to the above configuration, an electrode line pattern in which the electrode lines located on the first surface and the electrode lines located on the second surface are superimposed can be easily obtained. Further, when manufacturing the conductive film, it is easy to align the electrode wires located on the first surface with the electrode wires located on the second surface.

  A touch panel that solves the above-mentioned problems includes a conductive layer, a cover layer that covers the conductive film, and static electricity between the electrode lines disposed on the first surface and the electrode lines disposed on the second surface. And a peripheral circuit for measuring capacitance.

  According to the above configuration, even when the touch panel is superimposed on a plurality of display panels having different sizes and resolutions, it is possible to suppress the occurrence of moiré visually. Moire can be suppressed from being visually recognized on the panel.

  A display device that solves the above problem has a display panel that has a plurality of pixels arranged in a lattice and displays information, a touch panel that transmits the information displayed by the display panel, and controls driving of the touch panel. And a controller that performs the operation, wherein the touch panel is the above touch panel.

  According to the above configuration, since the moiré is suppressed from being visually recognized on the display device, a decrease in display quality is suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, when superimposing a plurality of display panels from which an electrode line pattern and a magnitude | size and a resolution differ mutually, it can suppress that a moire is visually recognized.

FIG. 2 is a cross-sectional view illustrating a cross-sectional structure according to an embodiment of the display device. It is a top view showing the plane structure of the conductive film in one embodiment. FIG. 2 is a plan view showing a pixel array of a display panel according to one embodiment. It is a mimetic diagram for explaining an electric composition of a touch panel in one embodiment. It is a figure showing composition of a sensing electrode wire in one embodiment. FIG. 3 is a diagram illustrating a configuration of a drive electrode line in one embodiment. FIG. 3 is a plan view illustrating a planar structure of a part of the conductive film according to one embodiment, and is a diagram illustrating a configuration of an electrode line pattern including sensing electrode lines and drive electrode lines. It is a figure showing composition of a reference electrode line in one embodiment. FIG. 9 is a diagram illustrating an example of an FFT analysis result of a pattern including a plurality of reference electrode lines according to an embodiment. FIG. 9 is a diagram illustrating a relationship between an occupancy ratio and an intensity of a frequency component in an FFT analysis result for a reference electrode line according to an embodiment. It is a figure showing a displacement field of a reference bent part in a reference electrode line of one embodiment. It is a figure showing an example of a sensing electrode wire created by displacement of a reference bent part in a reference electrode wire of one embodiment. FIG. 9 is a diagram illustrating an example of an FFT analysis result of a pattern including a plurality of reference electrode lines according to an embodiment. It is a figure showing an example of the FFT analysis result of the pattern of the sensing electrode line created based on the reference electrode line of one embodiment. It is a figure showing an example of the FFT analysis result of the pattern of the sensing electrode line created based on the reference electrode line of one embodiment. It is a figure showing an example of the FFT analysis result of the pattern of the sensing electrode line created based on the reference electrode line of one embodiment. It is a figure showing the relation between the size of the displacement area of the reference bent part of the reference electrode wire and the intensity of the fundamental spatial frequency component in the FFT analysis result of the sensing electrode wire in one embodiment. It is a figure showing an example of the FFT analysis result of the electrode line pattern which consists of a sensing electrode line and a drive electrode line of one embodiment. It is a figure showing an example of the FFT analysis result of the pattern of the sensing electrode line created based on the reference electrode line of a modification. It is sectional drawing which shows the cross-section of the display device in a modification. It is sectional drawing which shows the cross-section of the display device in a modification.

A conductive film, a touch panel, and a display device according to an embodiment will be described with reference to FIGS.
[Configuration of Display Device]
The configuration of the display device will be described with reference to FIG.

  As shown in FIG. 1, the display device 100 is a laminate in which, for example, a display panel 10 that is a liquid crystal panel and a touch panel 20 are bonded together by one transparent adhesive layer (not shown). And a control unit for controlling the driving of the circuit and the touch panel 20. The transparent adhesive layer may be omitted as long as the relative position between the display panel 10 and the touch panel 20 is fixed by another configuration such as a housing.

A display surface formed in a rectangular shape is partitioned on the surface of the display panel 10, and information such as an image based on image data from the outside is displayed on the display surface.
The components constituting the display panel 10 are arranged as follows in order from the component far from the touch panel 20. That is, the lower polarizing plate 11, the thin film transistor (hereinafter, TFT) substrate 12, the TFT layer 13, the liquid crystal layer 14, the color filter layer 15, the color filter substrate 16, and the upper polarizing plate 17 are located in the order far from the touch panel 20. I have.

  Among them, pixel electrodes constituting sub-pixels are arranged in a matrix on the TFT layer 13. The black matrix included in the color filter layer 15 has a lattice shape including a plurality of unit cells having a rectangular shape. The black matrix partitions a plurality of regions having a rectangular shape facing each of the sub-pixels by such a lattice shape, and each region partitioned by the black matrix emits white light in any of red, green, and blue. There is a colored layer that changes the light to that color.

  If the display panel 10 is an EL panel that outputs colored light and has a configuration including a red pixel that outputs red light, a green pixel that outputs green light, and a blue pixel that outputs blue light The color filter layer 15 described above may be omitted. At this time, the boundary between pixels adjacent to each other in the EL panel functions as a black matrix. In addition, the display panel 10 may be a plasma panel that emits light by discharge. In this case, a boundary portion that partitions the red phosphor layer, the green phosphor layer, and the blue phosphor layer is a black matrix. Function.

  The touch panel 20 is a capacitive touch panel, and is a laminate in which a conductive film 21 and a cover layer 22 are bonded to each other by a transparent adhesive layer 23, and has a light transmissivity for transmitting information displayed on the display panel 10. have.

  More specifically, the transparent substrate 31, the plurality of drive electrodes 31DP, the transparent adhesive layer 32, the transparent dielectric substrate 33, and the plurality of sensing electrodes are arranged in order from the components constituting the touch panel 20 close to the display panel 10. 33SP, the transparent adhesive layer 23, and the cover layer 22 are located. Among these, the transparent substrate 31, the drive electrode 31DP, the transparent adhesive layer 32, the transparent dielectric substrate 33, and the sensing electrode 33SP constitute the conductive film 21.

  The transparent substrate 31 has a light-transmitting property and an insulating property for transmitting information such as an image displayed on the display surface of the display panel 10 and is overlaid on the entire display surface. The transparent substrate 31 is made of, for example, a transparent glass substrate, a transparent resin film, or a substrate such as a silicon substrate. Examples of the resin used for the transparent substrate 31 include PET (Polyethylene Terephthalate), PMMA (Polymethyl methacrylate), PP (Polypropylene), PS (Polystyrene), and the like. The transparent substrate 31 may be a single-layer structure composed of one substrate, or may be a multilayer structure in which two or more substrates are stacked.

  The surface of the transparent substrate 31 opposite to the display panel 10 is set as a drive electrode surface 31S, and a plurality of drive electrodes 31DP are arranged on the drive electrode surface 31S. The plurality of drive electrodes 31DP and portions where the drive electrodes 31DP are not located on the drive electrode surface 31S are bonded to the transparent dielectric substrate 33 by one transparent adhesive layer 32.

  The transparent adhesive layer 32 has a light-transmitting property for transmitting information such as an image displayed on the display surface. For the transparent adhesive layer 32, for example, a polyether adhesive or an acrylic adhesive is used.

  The transparent dielectric substrate 33 has a light transmittance for transmitting information such as an image displayed on the display surface, and a relative permittivity suitable for detecting capacitance between electrodes. The transparent dielectric substrate 33 is made of, for example, a transparent glass substrate, a transparent resin film, or a substrate such as a silicon substrate. Examples of the resin used for the transparent dielectric substrate 33 include PET, PMMA, PP, and PS. The transparent dielectric substrate 33 may have a single-layer structure composed of one base material, or may have a multilayer structure in which two or more base materials are stacked.

  As a result of the plurality of drive electrodes 31DP being bonded to the transparent dielectric substrate 33 by the transparent adhesive layer 32, the plurality of drive electrodes 31DP are arranged on the back surface of the transparent dielectric substrate 33 that faces the transparent substrate 31.

  The surface of the transparent dielectric substrate 33 opposite to the transparent adhesive layer 32 is set as a sensing electrode surface 33S, and a plurality of sensing electrodes 33SP are arranged on the sensing electrode surface 33S. That is, the transparent dielectric substrate 33 is sandwiched between the plurality of drive electrodes 31DP and the plurality of sensing electrodes 33SP. The plurality of sensing electrodes 33SP and portions where the sensing electrodes 33SP are not located on the sensing electrode surface 33S are bonded to the cover layer 22 by one transparent adhesive layer 23.

  The transparent adhesive layer 23 has a light-transmitting property for transmitting information such as an image displayed on the display surface. For the transparent adhesive layer 23, for example, a polyether adhesive or an acrylic adhesive is used. The kind of the adhesive used as the transparent adhesive layer 23 may be a wet laminating adhesive, a dry laminating adhesive or a hot laminating adhesive.

  The cover layer 22 is formed of a glass substrate such as tempered glass or a resin film, and the surface of the cover layer 22 opposite to the transparent adhesive layer 23 is a surface of the touch panel 20 and functions as an operation surface 20S.

  In addition, among the above components, the transparent adhesive layer 23 may be omitted. In the configuration in which the transparent adhesive layer 23 is omitted, the surface facing the transparent dielectric substrate 33 among the surfaces of the cover layer 22 is set as the sensing electrode surface 33S, and one thin film formed on the sensing electrode surface 33S is formed. A plurality of sensing electrodes 33SP may be formed by patterning.

  When manufacturing the touch panel 20, a method in which the conductive film 21 and the cover layer 22 are bonded together with the transparent adhesive layer 23 may be adopted. As another example different from such a manufacturing method, the following method is used. A manufacturing method may be adopted. That is, a thin film layer made of a conductive metal such as copper is formed directly on the cover layer 22 such as a resin film or via an underlayer, and the pattern shape of the sensing electrode 33SP is formed on the thin film layer. The formed resist layer is formed. Next, the thin film layer is processed into a plurality of sensing electrodes 33SP by a wet etching method using ferric chloride or the like, and a first film is obtained. Similarly to the sensing electrode 33SP, a thin film layer formed on another resin film functioning as the transparent substrate 31 is processed into a plurality of drive electrodes 31DP to obtain a second film. Then, the first film and the second film are attached to the transparent dielectric substrate 33 by the transparent adhesive layers 23 and 32 so as to sandwich the transparent dielectric substrate 33 therebetween.

[Plane structure of conductive film]
With reference to FIG. 2, the planar structure of the conductive film 21 will be described focusing on the positional relationship between the sensing electrode 33SP and the drive electrode 31DP. FIG. 2 is a view of the conductive film 21 as viewed from a direction facing the surface of the transparent dielectric substrate 33. Each of the strip-shaped regions extending along the horizontal direction surrounded by a two-dot chain line is one. The area where the sensing electrode 33SP is arranged is shown, and each of the strip-shaped areas surrounded by the two-dot chain line extending in the vertical direction is an area where one drive electrode 31DP is arranged. Note that the numbers of the sensing electrodes 33SP and the drive electrodes 31DP are simplified.

  Further, in order to facilitate understanding of the configuration of the sensing electrode 33SP and the drive electrode 31DP, only the sensing electrode 33SP located at the uppermost position in FIG. In FIG. 2, only the drive electrode 31DP located on the leftmost side shows the drive electrode lines constituting the drive electrode 31DP by thin lines. In FIG. 2, the shape of the sensing electrode wire and the shape of the drive electrode wire are schematically shown.

  As shown in FIG. 2, on the sensing electrode surface 33S of the transparent dielectric substrate 33, each of the plurality of sensing electrodes 33SP has a band shape extending along the first electrode direction D1, which is one direction, and They are arranged along a second electrode direction D2 orthogonal to the first electrode direction D1. Each sensing electrode 33SP is mutually insulated from another adjacent sensing electrode 33SP.

  Each sensing electrode 33SP includes a plurality of sensing electrode lines 33SR, and a sensing electrode line group, which is a set of the plurality of sensing electrode lines 33SR, is arranged on the sensing electrode surface 33S. A metal film such as copper, silver, or aluminum is used as a material for forming the sensing electrode line 33SR, and the sensing electrode line 33SR is formed by, for example, patterning the metal film by etching. Each of the plurality of sensing electrodes 33SP is individually connected to a detection circuit which is an example of a peripheral circuit of the touch panel 20 via a sensing pad 33P, and a current value is measured by the detection circuit.

  On the drive electrode surface 31S of the transparent substrate 31, each of the plurality of drive electrodes 31DP has a band shape extending along the second electrode direction D2, and is arranged along the first electrode direction D1. Each drive electrode 31DP is insulated from another adjacent drive electrode 31DP.

  Each drive electrode 31DP is composed of a plurality of drive electrode lines 31DR, and a drive electrode line group, which is a set of the plurality of drive electrode lines 31DR, is arranged on the drive electrode surface 31S. A metal film such as copper, silver, or aluminum is used as a material for forming the drive electrode line 31DR, and the drive electrode line 31DR is formed by, for example, patterning the metal film by etching. Each of the plurality of drive electrodes 31DP is individually connected to a selection circuit, which is an example of a peripheral circuit of the touch panel 20, via a drive pad 31P, and is selected by the selection circuit by receiving a drive signal output from the selection circuit.

  In a plan view facing the surface of the transparent dielectric substrate 33, a portion where the sensing electrode 33SP and the drive electrode 31DP overlap each other is a capacitance detecting unit ND having a square shape defined by a two-dot chain line in FIG. . One capacitance detection section ND is a portion where one sensing electrode 33SP and one drive electrode 31DP three-dimensionally intersect, and detects a position on the touch panel 20 where a user's finger or the like touches. The smallest possible unit.

The method of forming the sensing electrode lines 33SR and the drive electrode lines 31DR is not limited to the above-described etching, and other methods such as a printing method may be used.
[Planar structure of display panel]
The planar structure of the color filter layer 15 in the display panel 10, that is, the pixel arrangement of the display panel 10 will be described with reference to FIG.

  As shown in FIG. 3, the black matrix 15a of the color filter layer 15 has a grid pattern composed of a plurality of unit grids having a rectangular shape arranged along the first electrode direction D1 and the second electrode direction D2. have. One pixel 15P is composed of three unit lattices that are continuous along the first electrode direction D1, and a plurality of pixels 15P are arranged in a grid along the first electrode direction D1 and the second electrode direction D2. In.

  Each of the pixels 15P includes a red coloring layer 15R for displaying red, a green coloring layer 15G for displaying green, and a blue coloring layer 15B for displaying blue. In the color filter layer 15, for example, a plurality of red coloring layers 15R, a plurality of green coloring layers 15G, and a plurality of blue coloring layers 15B are repeatedly arranged in this order along the first electrode direction D1. Further, the plurality of red coloring layers 15R are continuously arranged along the second electrode direction D2, the plurality of green coloring layers 15G are continuously arranged along the second electrode direction D2, and the plurality of blue coloring layers 15B. Are continuously arranged along the second electrode direction D2.

  One red coloring layer 15R, one green coloring layer 15G, and one blue coloring layer 15B constitute one pixel 15P, and the plurality of pixels 15P are formed of a red coloring layer 15R in the first electrode direction D1, a green color. The coloring layers 15G and the blue coloring layers 15B are arranged along the first electrode direction D1 while maintaining the order of arrangement. In other words, the plurality of pixels 15P are arranged in a stripe shape extending along the second electrode direction D2.

  The width of the pixel 15P along the first electrode direction D1 is the first pixel width P1, and the width of the pixel 15P along the second electrode direction D2 is the second pixel width P2. Each of the first pixel width P1 and the second pixel width P2 is set to a value according to the size of the display panel 10, the resolution required for the display panel 10, and the like.

[Electrical configuration of touch panel]
With reference to FIG. 4, an electrical configuration of the touch panel 20 will be described together with functions of a control unit included in the display device 100. In the following, as an example of the capacitance type touch panel 20, an electrical configuration of the mutual capacitance type touch panel 20 will be described.

  As shown in FIG. 4, the touch panel 20 includes a selection circuit 34 and a detection circuit 35 as peripheral circuits. The selection circuit 34 is connected to the plurality of drive electrodes 31DP, the detection circuit 35 is connected to the plurality of sensing electrodes 33SP, and the control unit 36 included in the display device 100 is connected to the selection circuit 34 and the detection circuit 35. I have.

  The control unit 36 generates and outputs a start timing signal for causing the selection circuit 34 to start generating a drive signal for each drive electrode 31DP. The control unit 36 generates and outputs a scan timing signal for causing the selection circuit 34 to sequentially scan the target to which the drive signal is supplied from the first drive electrode 31DP1 to the nth drive electrode 31DPn.

  The control unit 36 generates and outputs a start timing signal for causing the detection circuit 35 to start detecting the current flowing through each sensing electrode 33SP. The control unit 36 generates and outputs a scan timing signal for causing the detection circuit 35 to sequentially scan the detection target from the first sensing electrode 33SP1 to the nth sensing electrode 33SPn.

  The selection circuit 34 starts generating the drive signal based on the start timing signal output from the control unit 36, and switches the output destination of the drive signal to the first drive electrode based on the scan timing signal output from the control unit 36. Scanning is performed from 31DP1 toward the n-th drive electrode 31DPn.

  The detection circuit 35 includes a signal acquisition unit 35a and a signal processing unit 35b. The signal acquisition unit 35a starts acquiring a current signal that is an analog signal generated at each sensing electrode 33SP based on the start timing signal output from the control unit 36. Then, the signal acquisition unit 35a scans the acquisition source of the current signal from the first sensing electrode 33SP1 to the nth sensing electrode 33SPn based on the scanning timing signal output from the control unit 36.

  The signal processing unit 35b processes each current signal acquired by the signal acquisition unit 35a, generates a voltage signal that is a digital value, and outputs the generated voltage signal to the control unit 36. As described above, the selection circuit 34 and the detection circuit 35 generate the voltage signal from the current signal that changes in accordance with the change in the capacitance, thereby changing the change in the capacitance between the drive electrode 31DP and the sensing electrode 33SP. Is measured.

  The control unit 36 detects a position on the touch panel 20 touched by a user's finger or the like based on the voltage signal output from the signal processing unit 35b, and displays information on the detected position on the display surface of the display panel. Used for various processes such as generation of information. The touch panel 20 is not limited to the mutual capacitance type touch panel 20 described above, and may be a self-capacity type touch panel.

[Structure of sensing electrode]
The configuration of the sensing electrode 33SP will be described with reference to FIG.
As shown in FIG. 5, each of the plurality of sensing electrode lines 33SR has a bent line shape including a plurality of bent portions 33Q. In the plurality of bent portions 33Q, a bent portion 33Q corresponding to a mountain portion in the drawing is an example of a first bent portion, and a bent portion 33Q corresponding to a valley portion in the drawing is an example of a second bent portion. The peaks and the valleys in the figure are alternately arranged one by one along the sensing electrode line 33SR.

  The plurality of sensing electrode lines 33SR are arranged at intervals along the second electrode direction D2. It is preferable that the sensing electrode lines 33SR adjacent to each other do not cross or contact each other within the sensing electrode 33SP, and are insulated between the sensing electrodes 33SP. Each of the plurality of sensing electrode lines 33SR forming one sensing electrode 33SP is connected to the sensing pad 33P at one end in the first electrode direction D1.

  In detail, each of the plurality of sensing electrode lines 33SR is a set of short line portions 33E having a linear shape connecting the bent portions 33Q adjacent to each other along the sensing electrode line 33SR. It includes a plurality of short lines 33E arranged along the first electrode direction D1, and a bent portion 33Q that is a portion where two adjacent short lines 33E are connected. In other words, each of the plurality of sensing electrode lines 33SR has a polygonal line shape in which the plurality of short line portions 33E are connected via the bent portion 33Q and extend along the first electrode direction D1.

  Each of the plurality of short lines 33E has a length L1 along the direction in which the short line 33E extends, and the plurality of short lines 33E include short lines 33E having different lengths L1. That is, in the plurality of short line portions 33E, the length L1 is not constant. Between the plurality of short lines 33E arranged in the first electrode direction D1, the length L1 is irregularly changed with respect to the order of arrangement of the short lines 33E.

  Each of the plurality of short line portions 33E has an inclination of θ1 degrees with respect to a reference line A1, which is a virtual straight line extending along the first electrode direction D1, and the plurality of short line portions 33E have different inclinations θ1 from each other. Is included. That is, the inclination θ1 is not constant in the plurality of short line portions 33E. The inclination θ1 is an angle other than 0 degrees, and one inclination θ1 of the two short lines 33E adjacent to each other is positive, and the other inclination θ1 is negative. In other words, in one sensing electrode line 33SR, a short line portion 33E having a positive inclination θ1 and a short line portion 33E having a negative inclination θ1 are alternately repeated along the first electrode direction D1. . The absolute value of the inclination θ1 changes irregularly between the plurality of short lines 33E arranged in the first electrode direction D1 with respect to the order of arrangement of the short lines 33E.

  All of the plurality of short line portions 33E forming one sensing electrode line 33SR intersect or contact one reference line A1. In other words, for each sensing electrode line 33SR, a reference line A1, which is a single virtual straight line that intersects or contacts all of the plurality of short lines 33E constituting each sensing electrode line 33SR, can be arranged. Further, a plurality of sensing electrode lines 33SR are configured such that these reference lines A1 are arranged at predetermined intervals in the second electrode direction D2.

  When the number of bent portions 33Q of one sensing electrode line 33SR is defined as the number of bent portions, the variation in the number of bent portions among the plurality of sensing electrode lines 33SR, that is, the variation in the number of bent portions in the sensing electrode group is 5% or less. Preferably, there is. For all the sensing electrode lines 33SR included in the plurality of sensing electrodes 33SP, the arithmetic average value of the number of bent portions for each sensing electrode line 33SR is set as an average value Asave. For all the sensing electrode lines 33SR included in the plurality of sensing electrodes 33SP, the maximum value of the number of bent portions for each sensing electrode line 33SR is set to a maximum value Asmax. For all the sensing electrode lines 33SR included in the plurality of sensing electrodes 33SP, the minimum value of the number of bent portions for each sensing electrode line 33SR is set to the minimum value Asmin. At this time, the variation in the number of bent portions is given by (Asmax + Asmin) / (2 × Asave) × 100.

  Specifically, the number of bent portions of each sensing electrode line 33SR is preferably equal, and even if the number of bent portions varies among the plurality of sensing electrode lines 33SR, the number of bent portions of each sensing electrode line 33SR is smaller. The difference is preferably two or less. The reason why the difference in the number of bent portions is two or less is that the difference between the plurality of sensing electrode lines 33SR depends on whether or not the bent portion 33Q is arranged at each of two ends of each sensing electrode line 33SR. This may cause variations in the number of bent portions.

  If the variation in the number of bent portions among the plurality of sensing electrode lines 33SR is within the above range, the intersection or contact of the sensing electrode lines 33SR adjacent to each other is suppressed. When the sensing electrode lines 33SR adjacent to each other intersect or come into contact with each other, the short lines 33E of the sensing electrode lines 33SR intersect with each other to form a corner at the intersection or the contact portion. When the sensing electrode line 33SR is formed by etching, the electrode line is thickened at the corner, and the corner is easily recognized. Therefore, it is preferable that the number of corner portions is small, and for that purpose, it is preferable that the number of the intersections and the contact portions is small.

  In one sensing electrode line 33SR, a set of virtual line segments A3, which are virtual line segments connecting every other bent portion 33Q arranged along the bent line in a straight line, is defined as a virtual line A2. That is, the imaginary line segment A3 is a line segment in which the ridge portions adjacent to each other or the valley portions adjacent to each other in the bending line are linearly connected. In other words, the first bending portions adjacent to each other. It is a line segment connecting the second bent portions adjacent to each other or to each other. A plurality of virtual line segments A3 extending along the first electrode direction D1 form a virtual line A2.

  Each of the plurality of virtual line segments A3 has a tilt of θ2 degrees with respect to the reference line A1, and the plurality of virtual line segments A3 includes a virtual line segment A3 having a tilt θ2 of an angle other than 0 °. . That is, the plurality of virtual line segments A3 include the virtual line segment A3 extending in a direction different from the first electrode direction D1. Further, the plurality of virtual line segments A3 include virtual line segments A3 having different inclinations θ2. That is, the inclination θ2 is not constant in the plurality of virtual line segments A3. In one virtual line A2, the inclination θ2 changes irregularly with respect to the order of arrangement of the virtual line segment A3. The plurality of virtual line segments A3 may include a virtual line segment A3 whose inclination θ2 is 0 degrees.

  In addition, it is preferable that all the straight lines extending along the first electrode direction D1 that can be virtually arranged in the region where the sensing electrode line group is arranged intersect or contact any one of the plurality of sensing electrode lines 33SR. . According to such a configuration, the gap between the sensing electrode lines 33SR adjacent to each other is suppressed from becoming excessively large. As a result, it is possible to prevent the gap from being visually recognized with periodicity. Further, the uniformity of the appearance on the operation surface of the touch panel 20 is improved.

[Configuration of drive electrode]
The configuration of drive electrode 31DP will be described with reference to FIG.
As shown in FIG. 6, each of the plurality of drive electrode lines 31DR has a bent line shape including a plurality of bent portions 31Q, and the plurality of drive electrode lines 31DR are spaced apart along the first electrode direction D1. Are arranged. Each of the plurality of drive electrode lines 31DR forming one drive electrode 31DP is connected to the drive pad 31P at one end in the second electrode direction D2.

  Specifically, each of the plurality of drive electrode lines 31DR is a set of linear short portions 31E connecting the bent portions 31Q adjacent to each other along the drive electrode line 31DR, and each drive electrode line 31DR is It includes a plurality of short line portions 31E arranged in the second electrode direction D2 and a bent portion 31Q which is a portion where two adjacent short line portions 31E are connected. In other words, each of the plurality of drive electrode lines 31DR has a polygonal line shape in which the plurality of short line portions 31E are continuous via the bent portion 31Q and extend along the second electrode direction D2.

  Each of the plurality of short line portions 31E has a length L2 along the direction in which the short line portion 31E extends, and the plurality of short line portions 31E include short line portions 31E having different lengths L2. That is, in the plurality of short line portions 31E, the length L2 is not constant. Between the plurality of short lines 31E arranged in the second electrode direction D2, the length L2 is irregularly changed in the order of arrangement of the short lines 31E.

  Each of the plurality of short line portions 31E has an inclination of θ3 degrees with respect to a reference line B1, which is a virtual straight line extending along the second electrode direction D2, and the plurality of short line portions 31E have different inclinations θ3 from each other. Is included. That is, the inclination θ3 is not constant in the plurality of short line portions 31E. The inclination θ3 is an angle other than 0 degrees, and in one drive electrode line 31DR, a short line portion 31E having a positive inclination θ3 and a short line portion 31E having a negative inclination θ3 in the second electrode direction D2. Are alternately repeated along. The absolute value of the inclination θ3 changes irregularly between the plurality of short lines 31E arranged along the second electrode direction D2 with respect to the order of arrangement of the short lines 31E.

  All of the plurality of short lines 31E constituting one drive electrode line 31DR intersect or contact one reference line B1. In other words, for each drive electrode line 31DR, a reference line B1, which is a single virtual straight line that intersects or contacts all of the plurality of short lines 31E constituting each drive electrode line 31DR, can be arranged. Further, a plurality of drive electrode lines 31DR are configured such that these reference lines B1 are arranged at predetermined intervals in the first electrode direction D1.

  When the number of bent portions 31Q included in one drive electrode line 31DR is the number of bent portions, the variation in the number of bent portions among the plurality of drive electrode lines 31DR, that is, the variation in the number of bent portions in the drive electrode line group is 5% or less. It is preferred that For all the drive electrode lines 31DR included in the plurality of drive electrodes 31DP, the arithmetic average value of the number of bent portions for each drive electrode line 31DR is set to the average value Adave. For all the drive electrode lines 31DR included in the plurality of drive electrodes 31DP, the maximum value of the number of bent portions for each drive electrode line 31DR is set to the maximum value Admax. For all the drive electrode lines 31DR included in the plurality of drive electrodes 31DP, the minimum value of the number of bent portions for each drive electrode line 31DR is set to the minimum value Admin. At this time, the variation in the number of bent portions is given by (Admax + Admin) / (2 × Adave) × 100.

  Specifically, the number of bends of each drive electrode line 31DR is preferably equal, and even if the number of bends varies among the plurality of drive electrode lines 31DR, the number of bends in each drive electrode line 31DR is reduced. The difference is preferably two or less.

  If the variation in the number of bends among the plurality of drive electrode lines 31DR is within the above range, the drive electrode lines 31DR adjacent to each other can be prevented from intersecting or contacting.

  In one drive electrode line 31DR, a set of virtual line segments B3, which are virtual line segments that connect every other bent portion 31Q arranged along the bent line in a straight line, is referred to as a virtual line B2. That is, the virtual line segment B3 connects the first bent portions corresponding to the ridge portions adjacent to each other in the bent line or the second bent portions corresponding to the valley portions adjacent to each other in a straight line. It is a line segment. Then, a plurality of virtual line segments B3 connected along the second electrode direction D2 constitute a virtual line B2.

  Each of the plurality of virtual line segments B3 has a tilt of θ4 degrees with respect to the reference line B1, and the plurality of virtual line segments B3 includes a virtual line segment B3 having a tilt θ4 of an angle other than 0 °. . That is, the plurality of virtual line segments B3 include the virtual line segment B3 extending in a direction different from the second electrode direction D2. Further, the plurality of virtual line segments B3 include virtual line segments B3 having different inclinations θ4. That is, the inclination θ4 is not constant in the plurality of virtual line segments B3. Then, in one virtual line B2, the inclination θ4 changes irregularly with respect to the order of arrangement of the virtual line segments B3. The plurality of virtual line segments B3 may include a virtual line segment B3 having an inclination θ4 of 0 degree.

  In addition, it is preferable that all of the straight lines extending along the second electrode direction D2, which can be virtually arranged in the region where the drive electrode line group is arranged, intersect or contact any one of the plurality of drive electrode lines 31DR. .

[Detailed structure of conductive film]
Referring to FIG. 7, the detailed structure of conductive film 21 will be described centering on an electrode line pattern which is a pattern formed by overlapping sensing electrode line 33SR and drive electrode line 31DR, and its operation. Will be described.

  As shown in FIG. 7, in the conductive film 21, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the pattern formed by the above-described plurality of sensing electrode lines 33 SR and the plurality of drive electrode lines 31 DR A pattern is formed in which the configured pattern is superimposed. At this time, these electrode lines are overlapped so that the sensing electrode 33SP and the drive electrode 31DP are orthogonal to each other, that is, the direction in which the sensing electrode line 33SR extends is orthogonal to the direction in which the drive electrode line 31DR extends. .

  As described above, in the sensing electrode line 33SR, the inclination θ2 of the virtual line segment A3 changes irregularly with respect to the order of the virtual line segment A3 in the virtual line A2. Further, in the plurality of short lines 33E constituting the sensing electrode line 33SR, the length L1 of the short lines 33E and the inclination θ1 of the short lines 33E change irregularly with respect to the order of arrangement of the short lines 33E. . Further, the drive electrode line 31DR also has a similar irregularity.

  According to such a configuration, the periodicity of the electrode line pattern composed of the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR, that is, the presence or absence of a structure in the first electrode direction D1 and the second electrode direction D2. The periodicity is so low that it cannot be visually recognized. Therefore, when such an electrode line pattern is used, the influence of the periodicity of the pixel pattern on the suppression of moire can be reduced. Therefore, even when the touch panel 20 having such an electrode line pattern is superimposed on a plurality of display panels 10 having different sizes and different resolutions, it is possible to suppress the occurrence of moire on each of the display panels 10.

[Method of creating electrode wire pattern]
With reference to FIGS. 8 to 18, a method of creating an electrode line pattern including the above-described plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR will be described. Hereinafter, a method of forming a pattern including the sensing electrode lines 33SR will be described.

  The pattern of the sensing electrode lines 33SR of the present embodiment is created based on a pattern composed of a plurality of reference electrode lines having a periodic polygonal line shape. First, a pattern composed of reference electrode lines will be described with reference to FIG.

  As shown in FIG. 8, each of the plurality of reference electrode lines 40KR is a set of two types of reference short line portions 40E having a linear shape and mutually different inclinations, and is alternately arranged along the first electrode direction D1. And a reference bent portion 40Q which is a portion to which the two types of reference short wire portions 40E are connected. In other words, each of the plurality of reference electrode lines 40KR has a polygonal line shape in which the plurality of short reference line portions 40E are continuous via the reference bent portion 40Q and extends along the first electrode direction D1.

  Each of the two types of reference short line portions 40E has a length Lk along the direction in which the reference short line portion 40E extends. The lengths Lk of the plurality of reference short line portions 40E are all equal. Of the two types of reference short line portions 40E, one reference short line portion 40Ea has an inclination of + θk with respect to a reference line A1 which is a straight line extending along the first electrode direction D1, and the other reference short line portion 40Eb. Has an inclination of -θk with respect to the reference line A1. The angle between the two reference short line portions 40E adjacent to each other is the reference angle α, and they are all equal. The reference angle α is bisected by a straight line passing through the reference bent portion 40Q and extending in a direction along the second electrode direction D2.

  In other words, the plurality of reference bending portions 40Q include a mountain portion in the drawing as an example of a first virtual bending portion and a valley portion in the drawing as an example of the second virtual bending portion. The two virtual bends are periodically arranged alternately one by one along the reference electrode line 40KR. The plurality of first virtual bent portions and the plurality of second virtual bent portions are located on different straight lines extending along the first electrode direction D1.

  The plurality of reference electrode lines 40KR are arranged at a fixed reference interval Pk along the second electrode direction D2. That is, the reference interval Pk is a distance between the reference electrode lines 40KR adjacent to each other.

  Each of the plurality of reference electrode lines 40KR is formed in a shape in which one reference electrode line 40KR is translated along the second electrode direction D2, and in the plurality of reference electrode lines 40KR, the reference short line portion 40Ea and the reference short line portion 40Eb are formed. And the reference bent portion 40Q, which is a portion connected to the first electrode, is arranged on one straight line extending along the second electrode direction D2.

  The width occupied by one reference electrode line 40KR in the second electrode direction D2, that is, the length of one reference short line portion 40E along the second electrode direction D2 is the reference width H. In the plurality of reference electrode lines 40KR, the reference width H is constant.

  The length between the reference bent portions 40Q adjacent to each other along the first electrode direction D1 is the reference period W. That is, the reference period W is the length between two connected reference bent portions 40Q when the reference bent portions 40Q arranged along the bent line are connected with every other straight line in one reference electrode line 40KR. It is the length between the first virtual bent portions corresponding to the ridges adjacent to each other in the bending line, or the length between the second virtual bent portions corresponding to the valleys adjacent to each other. The reference period W is constant in one reference electrode line 40KR, and the reference period W is also constant in a plurality of reference electrode lines 40KR.

  Each parameter of the reference angle α, the reference interval Pk, the reference width H, and the reference cycle W is obtained by superimposing a pattern composed of a plurality of reference electrode lines 40KR and a pixel pattern of the display panel 10 using Fourier analysis. Sometimes, the value is set to a value at which the occurrence of moire is suppressed. Specifically, the contrast of a moire generated when a pattern composed of a plurality of reference electrode lines 40KR is superimposed on a pixel pattern having a predetermined period, and the pitch and angle of a stripe recognized as a moire are calculated, and the moire is visually recognized. The value of each parameter is set to make it difficult. At this time, it is preferable that the value of each parameter that suppresses generation of moiré is commonly obtained for the pixel patterns of the plurality of display panels 10 having different sizes and different resolutions. The plurality of display panels 10 to be superimposed only need to include at least two types of display panels having different sizes or two types of display panels having different resolutions.

  In the Fourier analysis, a Fourier transform is performed on a pattern to be superimposed to obtain frequency information, a convolution of the obtained two-dimensional Fourier pattern is calculated, a two-dimensional mask is applied, and an inverse Fourier transform is applied. To perform image reconstruction. Since the pitch of the moiré is larger than the period of the original pattern to be superimposed, the two-dimensional mask only needs to remove high-frequency components and extract only low-frequency components by the two-dimensional mask. By setting the size of the mask to a size determined according to the human visual response characteristics, based on calculating the contrast, pitch, and angle of moiré after image reconstruction, whether or not moiré is visually recognized Can be determined.

  The reference interval Pk is preferably set in a range of 10% or more and 300% or less of the first pixel width P1 and the second pixel width P2 in the display panel 10. When the first pixel width P1 is different from the second pixel width P2, the larger one of the first pixel width P1 and the second pixel width P2 may be used as a reference.

  If the reference interval Pk is 10% or more of the first pixel width P1 and the second pixel width P2, the ratio of the electrode lines in the operation surface is not excessively large when viewed from the direction facing the operation surface. In addition, a decrease in light transmittance of the touch panel 20 is suppressed. On the other hand, if the reference interval Pk is 300% or less of the first pixel width P1 and the second pixel width P2, the position detection accuracy on the touch panel is improved.

The reference width H is preferably set in a range where the occupancy ratio H / Pk, which is the ratio of the reference width H to the reference interval Pk set as described above, is 0.7 or more and 1.3 or less.
The reason for defining the range of the occupancy ratio H / Pk will be described with reference to FIGS.

  FIG. 9 is a result of analyzing an example of the pattern composed of the plurality of reference electrode lines 40KR shown in FIG. 8 by FFT (Fast Fourier Transformation). 4 shows a power spectrum by two-dimensional Fourier transform. FIG. 9 highlights characteristic peaks, and omits weak points that are low in relation to the pattern of the reference electrode line 40KR.

  The origin indicates the peak of the DC component, and basic spatial frequency components f1 and f2 defined by the reference angle α and the reference period W, and higher-order components appear in the two-dimensional frequency space. In the figure, frequency components due to the reference period W appear on the left and right of the basic spatial frequency component f1 and on the left and right of the basic spatial frequency component f2.

  Here, a frequency component g which is a spatial frequency only in the v direction appears between the basic spatial frequency component f1 and the basic spatial frequency component f2. The frequency component g is a frequency component generated due to the reference interval Pk, and is derived from the periodicity only in the second electrode direction D2 included in the pattern of the reference electrode line 40KR. The high intensity of the frequency component g indicates that the frequency component of the electrode line extending in the first electrode direction D1 in the pattern of the reference electrode line 40KR is large. In this case, the display panel 10 also extends in the first electrode direction D1. The pixel pattern and the electrode line pattern interfere with each other, and moire with high contrast is easily generated.

  FIG. 10 shows a result of analyzing how the intensity of the frequency component g in the FFT analysis result changes when the reference width H and the occupation ratio H / Pk are changed. That is, the relationship between the degree of overlap between one reference electrode line 40KR and another reference electrode line 40KR viewed from the first electrode direction D1 and the intensity of the frequency component g is shown. 10, the vertical axis represents the logarithmic representation of the relative value obtained by dividing the intensity of the frequency component g by the intensity of the DC component of the entire pattern of the reference electrode line 40KR, and the horizontal axis represents the occupancy ratio H / Pk. .

  As shown in FIG. 10, when increasing the occupancy ratio H / Pk from 0.4, if the occupancy ratio H / Pk exceeds 0.7, the intensity of the frequency component g sharply decreases, and the occupancy ratio H / Pk decreases. When H / Pk is 1.0, the intensity of the frequency component g becomes minimum. When the occupation ratio H / Pk exceeds 1.0, the intensity of the frequency component g increases, and when the occupation ratio H / Pk exceeds 1.3, the intensity of the frequency component g becomes high and constant.

  Therefore, when the occupancy ratio H / Pk is 0.7 or more and 1.3 or less, the intensity of the frequency component g is suppressed to a low level, so that moiré hardly occurs. Since the intensity of the frequency component g is lowest, it is suggested that moiré is least likely to occur.

  The reference angle α is preferably from 95 to 150 degrees, more preferably from 100 to 140 degrees. When the reference angle α is equal to or greater than 95 degrees, the number of the reference bent portions 40Q increases and the ratio of the electrode wires occupied on the operation surface is suppressed, so that the light transmittance of the touch panel 20 decreases. Is suppressed. On the other hand, if the reference angle α is equal to or less than 150 degrees, the reference period W is maintained in a range that is not too large, so that it is easy to set the reference interval Pk and the occupancy ratio H / Pk to values within an appropriate range. Becomes When the reference angle α is 90 degrees, the ratio between the reference period W and the reference width H is 2: 1. When the occupation ratio H / Pk is 1.0, the ratio between the reference period W and the reference interval Pk is not satisfied. The ratio becomes 2: 1. As a result, the interference between the reference period W and the reference interval Pk becomes strong, which is not preferable.

Subsequently, a method of creating a pattern composed of the plurality of sensing electrode lines 33SR based on the pattern composed of the plurality of reference electrode lines 40KR will be described.
The pattern including the plurality of sensing electrode lines 33SR is created by irregularly displacing the position of the reference bent portion 40Q in the plurality of reference electrode lines 40KR. The displacement region of the reference bending portion 40Q will be described in detail with reference to FIGS.

  As shown in FIG. 11, the position of the reference bent portion 40Q is moved within a rhombic displacement region S centered on the reference bent portion 40Q. In one sensing electrode line 33SR, the position of each reference bent portion 40Q in one reference electrode line 40KR moves irregularly in the displacement region S of each reference bent portion 40Q with respect to the order of arrangement of the reference bent portions 40Q. Has a shaped shape.

  The displacement region S has a rhombic shape having a diagonal line extending along the first electrode direction D1 and a diagonal line extending along the second electrode direction D2. The length of the diagonal extending along the first electrode direction D1 is the length dx, and the length of the diagonal extending along the second electrode direction D2 is the length dy. It is preferable that the length dx is set in a range of 0.1 times or more and 0.5 times or less of the reference period W. Further, it is preferable that the length dy is set in a range from 0.2 times to 1.0 times the reference interval Pk.

  If the lengths dx and dy are equal to or larger than the above lower limits, an electrode wire shape in which the periodicity of the reference electrode wire 40KR is sufficiently broken is obtained as the sensing electrode wire 33SR. On the other hand, if the lengths dx and dy are equal to or less than the upper limit values, the sensing electrode lines 33SR adjacent to each other may intersect in the pattern of the sensing electrode lines 33SR obtained by irregularly displacing the reference bent portion 40Q. Contact is suppressed.

  The upper limits of the lengths dx and dy are more preferably determined in consideration of the line width of the sensing electrode line 33SR, the displacement of the sensing electrode line 33SR in the manufacturing process, and the like. It is more preferable that dx is set in the range of 0.1 to 0.48 times the reference period W, and the length dy is set in the range of 0.2 to 0.98 times the reference interval Pk.

  FIG. 12 shows a pattern of the sensing electrode lines 33SR obtained by irregularly displacing the positions of the respective reference bent portions 40Q in the plurality of reference electrode lines 40KR within the displacement regions S set for the respective reference bent portions 40Q. An example is shown below. In FIG. 12, the reference electrode line 40KR is indicated by a thin line, and the sensing electrode line 33SR is indicated by a thick line.

  The reference bent portion 40Q after being moved in the displacement region S is the bent portion 33Q of the sensing electrode line 33SR, and the length and the inclination with respect to the first electrode direction D1 are changed with the displacement of the reference bent portion 40Q. The subsequent reference short line portion 40E is the short line portion 33E of the sensing electrode line 33SR. The position of each reference bent portion 40Q in the plurality of reference electrode lines 40KR is irregularly displaced with respect to the order in which the reference bent portions 40Q are arranged in each reference electrode line 40KR, and thus is constituted by the plurality of sensing electrode lines 33SR. Pattern is formed.

Here, the reason for defining the range of the lengths dx and dy in the displacement region S will be described with reference to FIGS.
FIG. 13 shows a result of analyzing, by FFT, an example of a pattern of the reference electrode line 40KR in which the occupation ratio H / Pk is set to 1.0. Since the occupation ratio H / Pk is 1.0, the intensity of the frequency component g is much lower than that of the peak group including the basic spatial frequency components f1 and f2. Is omitted.

  FIGS. 14 to 16 show an example of a pattern obtained by irregularly displacing the position of each reference bent portion 40Q in the pattern of the reference electrode line 40KR used in the FFT analysis of FIG. , FFT shows the results of analysis.

FIG. 14 shows an analysis result of a pattern in which the positions of the reference bent portions 40Q are displaced with the lengths dx and dy in the displacement region S near the lower limit of the above range.
In the power spectrum shown in FIG. 14, in the frequency region higher than the basic spatial frequency components f1 and f2, points having a low average intensity appear as a band-like peak group as compared with FIG. The strip-shaped points are distributed in a direction defined by the reference angle α in the reference electrode line 40KR. The reason why such a band-like point appears is that a non-periodic noise component increases due to the irregular displacement of the reference bent portion 40Q.

FIG. 15 shows an analysis result of a pattern in which the positions of the reference bent portions 40Q are displaced with the lengths dx and dy in the displacement region S near the center value of the above range.
In the power spectrum shown in FIG. 15, the number of band-like points based on the noise component is increased as compared with FIG. On the other hand, the higher-order term intensity of the frequency component based on the periodicity of the reference electrode line 40KR decreases, suggesting that the higher-order component is buried in the noise.

FIG. 16 shows an analysis result of a pattern in which the positions of the reference bent portions 40Q are displaced with the lengths dx and dy in the displacement region S near the upper limit of the above range.
In the power spectrum shown in FIG. 16, only the fundamental spatial frequency can be confirmed as a peak. Further, as the lengths dx and dy in the displacement region S approach the upper limit of the above range, the intensity of the basic spatial frequency components f1 and f2 decreases. As a result, the contrast of moiré generated when the display panel 10 is superimposed is reduced.

  FIG. 17 is a diagram illustrating a relationship between the basic spatial frequency components f1 and f2 and the size of the displacement area S. In FIG. 17, the vertical axis represents a relative value obtained by dividing the basic spatial frequency intensity by the DC component intensity, and the horizontal axis represents 2 × length dx / reference period W as a parameter indicating the size of the displacement region S, and , Length dy / reference interval Pk.

  As shown in FIG. 17, the basic spatial frequency intensity decreases linearly when 2dx / W and dy / Pk exceed 0.2. Therefore, 2dx is preferably 0.2 times or more and 1.0 times or less of the reference period W, that is, the length dx is 0.1 times or more and 0.5 times or less of the reference period W. preferable. The length dy is preferably 0.2 times or more and 1.0 times or less the reference interval Pk.

  As described above, in the power spectrum obtained by performing the two-dimensional Fourier transform on the pattern composed of the plurality of sensing electrode lines 33SR, the peaks that are the basic spatial frequency components and the spatial frequency region higher than the basic spatial frequency A peak group, which is a band-like distribution in which points having an average intensity lower than the spatial frequency component, appears. These peaks and peak groups are four directions extending radially from the origin, and appear along each of the four directions located in line symmetry with respect to each of two coordinate axes orthogonal to each other at the origin. . These four directions are directions defined by the reference angle α in the reference electrode line 40KR.

  The peaks and peak groups are defined by the angle of the sensing electrode line 33SR at the bent portion 33Q including the first bent portion and the second bent portion, the distance between the first bent portions adjacent to each other, the second bent portion adjacent to each other. The distance between the parts is a peak derived from these periodicities.

  Similarly to the pattern composed of the plurality of sensing electrode lines 33SR, the pattern composed of the plurality of drive electrode lines 31DR irregularly displaces the reference bent portion of the plurality of reference electrode lines having a periodic broken line shape. Created by:

  FIG. 18 is an example of an electrode line pattern in which the pattern of the sensing electrode lines 33SR created as described above and the pattern of the drive electrode lines 31DR are superimposed, that is, an example of the electrode line pattern as shown in FIG. Shows the result of analyzing by FFT.

  In the power spectrum shown in FIG. 18, the basic spatial frequency components f1 and f2 due to the periodicity of the reference electrode line on which the sensing electrode line 33SR is based, and the reference electrode line on which the drive electrode line 31DR is based. Eight peaks appear in total of the basic spatial frequency components f3 and f4 due to the periodicity.

  In the present embodiment, the first electrode direction D1, which is the direction in which the sensing electrode line 33SR extends, and the second electrode direction D2, which is the direction in which the drive electrode line 31DR extends, are orthogonal to each other. Therefore, the positions of the eight peaks are arranged line-symmetrically with respect to each of the u-axis and the v-axis.

  As described above, in the electrode line pattern of the present embodiment, noise is increased while leaving a basic spatial frequency component, as compared with a pattern formed of highly periodic electrode lines such as the reference electrode line 40KR. Very low periodicity. Therefore, when the electrode line pattern of the present embodiment is used, the influence of the periodicity of the pixel pattern on the suppression of moire can be reduced.

  Therefore, when the touch panel 20 having such an electrode line pattern is superimposed on a plurality of display panels 10 having different sizes and resolutions, compared with a conventional pattern having a periodicity that can be visually recognized as in the related art, Moire can be suppressed from being visually recognized on the display panel 10 having various pixel patterns.

  The basic spatial frequency component is defined by the shape of the reference electrode line 40KR. Therefore, when each parameter of the reference electrode line 40KR is superimposed on a plurality of display panels 10 having different sizes and resolutions, the pattern of the reference electrode line 40KR has a pattern in which moire is suppressed for each display panel 10. By setting so that moiré is not observed due to the periodicity based on the fundamental spatial frequency component.

  The periodicity of the electrode line pattern according to the present embodiment is reduced due to the irregular displacement of the reference bent portion 40Q as well as the plurality of display panels 10 used for setting each parameter in the reference electrode line 40KR. As a result, occurrence of moire can be suppressed for display panels 10 having more various pixel patterns other than the plurality of display panels 10. As a result, in the display device 100 including the touch panel 20 having the electrode line pattern according to the present embodiment, a decrease in display quality is suppressed.

  In the above embodiment, the transparent dielectric substrate 33 is an example of a transparent dielectric layer. When the front surface of the transparent dielectric substrate 33 is the first surface, the back surface of the transparent dielectric substrate 33 is the second surface, the sensing electrode lines 33SR are the first electrode lines, and the sensing electrode group is the first electrode. Group, the drive electrode line 31DR is a second electrode line, the first electrode direction D1 is a first direction and a second cross direction, and the second electrode direction D2 is a second direction and a first cross direction. is there. When the front surface of the transparent dielectric substrate 33 is the second surface, the back surface of the transparent dielectric substrate 33 is the first surface, the sensing electrode lines 33SR are the second electrode lines, and the drive electrode lines 31DR are the first surfaces. The first electrode direction D1 is a second direction and a first intersecting direction, and the second electrode direction D2 is a first direction and a second intersecting direction. Direction.

As described above, according to the present embodiment, the following effects can be obtained.
(1) In the sensing electrode lines 33SR and the drive electrode lines 31DR, the inclinations θ2 and θ4 are irregularly changed at a plurality of virtual line segments A3 and B3 included in the virtual lines A2 and B2. According to such a configuration, since the electrode line pattern composed of the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR includes the bent line that bends irregularly, the electrode line pattern is changed from the regular bent line as in the related art. The periodicity of the electrode line pattern is lower than that of the electrode line pattern. Therefore, regarding the suppression of moiré, the influence of the periodicity of the pixel pattern can be suppressed low. Therefore, even when the touch panel 20 having such an electrode line pattern is overlaid on a plurality of display panels 10 having different sizes and resolutions, it is possible to suppress the occurrence of moiré, and it is possible to reduce It is possible to suppress the recognition of moire on various display panels 10.

  (2) In the plurality of short line portions 33E constituting the sensing electrode line 33SR, the length L1 of the short line portion 33E and the inclination θ1 of the short line portion 33E with respect to the first electrode direction D1 are irregularly changed. The drive electrode line 31DR also has a similar irregularity. By configuring the sensing electrode lines 33SR and the drive electrode lines 31DR in this manner, a bent line shape that bends irregularly is realized accurately.

  (3) All of the plurality of short lines 33E of the sensing electrode line 33SR intersect or contact one reference line A1. Further, all of the plurality of short line portions 31E of the drive electrode line 31DR intersect or contact with one reference line B1. According to such a configuration, since the first bent portion and the second bent portion are arranged so as to spread in the direction in which the electrode lines are arranged, the degree of bending at the bent line is increased, and an irregular bent line shape is accurately realized. can do.

  Further, each of the reference line A1 arranged for each of the plurality of sensing electrode lines 33SR and the reference line B1 arranged for each of the plurality of drive electrode lines 31DR is arranged along the direction in which the electrode lines are arranged. Are arranged at predetermined intervals. According to such a configuration, in the sensing electrode line group and the drive electrode line group, excessive deviation of the positions of the bending lines and the positions of the bending portions constituting the electrode lines is suppressed, and the uniformity of the appearance on the operation surface of the touch panel 20 is also reduced. Enhanced.

  (4) The variation in the number of the bent portions 33Q in the sensing electrode wire group is 5% or less, and the variation in the number of the bent portions 31Q in the drive electrode wire group is 5% or less. According to such a configuration, the sensing electrode lines 33SR adjacent to each other and the drive electrode lines 31DR adjacent to each other are prevented from intersecting or contacting with each other. For this reason, it is possible to prevent the electrode line from being easily recognized due to the electrode line becoming thicker at the intersection formed between the electrode lines or the contact portion.

  (5) The bent line shapes of the sensing electrode line 33SR and the drive electrode line 31DR are such that the positions of the reference bent portions are irregularly displaced with respect to the order in which the reference bent portions are arranged in the reference electrode lines which are periodic broken lines. Shape. According to such a configuration, it is possible to easily create the sensing electrode lines 33SR and the drive electrode lines 31DR having a bent line shape that bends irregularly.

  (6) In the pattern composed of the plurality of reference electrode lines 40KR, the occupancy ratio H / Pk, which is the ratio of the reference width H to the reference interval Pk, is 0.7 or more and 1.3 or less. According to such a configuration, the intensity of the frequency component of the element extending in the direction in which the reference electrode line 40KR extends, which appears in the FFT analysis of the pattern of the reference electrode line 40KR, can be suppressed to a low level. When moire is superimposed, it is difficult to visually recognize moire. As a result, even in the electrode line pattern created based on the reference electrode line 40KR, it is possible to accurately suppress the occurrence of the moiré when superimposed on the display panel 10.

  (7) In the pattern composed of the plurality of reference electrode lines 40KR, if the reference angle α is 95 degrees or more, the number of the reference bent portions 40Q increases, and the ratio of the electrode lines in the operation surface is excessive. Therefore, a decrease in light transmittance of the touch panel 20 is suppressed. On the other hand, if the reference angle α is equal to or less than 150 degrees, the reference period W is maintained in a range that is not too large, so that it is easy to set the reference interval Pk and the occupancy ratio H / Pk to values within an appropriate range. Becomes

  (8) The reference bent portion 40Q is moved in the displacement region S having a rhombic shape. In the displacement region S, the length of the diagonal line extending in the first electrode direction D1 is equal to or more than 0.1 times the reference period W and equal to or less than 0.1. 5 times or less, and the length of the diagonal line extending in the second electrode direction D2 is 0.2 times or more and 1.0 times or less of the reference interval Pk. When the displacement region S is within the above range, the basic spatial frequency intensity appearing in the FFT analysis of the electrode line pattern created based on the reference electrode line 40KR can be suppressed low. Therefore, when the electrode line pattern and the display panel 10 are superimposed, moire is less likely to be visually recognized.

  (9) In the power spectrum obtained by the two-dimensional Fourier transform of the pattern composed of the plurality of sensing electrode lines 33SR, each of two coordinate axes which are four directions extending radially from the origin and are orthogonal to the origin. When the four directions symmetrically positioned with respect to each other are defined as the periodic direction, the angle of the sensing electrode line 33SR at the first bent portion, the angle of the sensing electrode line 33SR at the second bent portion, the distance between the first bent portions adjacent to each other. , The distance between the second bent portions adjacent to each other, and peaks derived from these periodicities are distributed in a band shape along each periodic direction. A similar power spectrum can be obtained for a pattern composed of a plurality of drive electrode lines 31DR. In a configuration in which such a power spectrum is obtained with respect to the pattern of the sensing electrode lines 33SR and the pattern of the drive electrode lines 31DR, the periodicity of the electrode line patterns is suppressed low. It can be suppressed from being viewed.

  (10) In the power spectrum, the peaks distributed in the band shape include peaks stronger than the peaks derived from the periodicity of only the second electrode direction D2 in the plurality of sensing electrode lines 33SR. A similar power spectrum can be obtained for a pattern composed of a plurality of drive electrode lines 31DR. According to such a configuration, since the periodicity of the electrode line pattern in the direction in which the electrode lines are arranged is suppressed to a low level, it is possible to accurately prevent moire from being visually recognized on a plurality of display panels.

[Modification]
The above embodiment can be modified and implemented as follows.
When the sensing electrode line 33SR and the drive electrode line 31DR overlap, the first electrode direction D1 that is the direction in which the sensing electrode line 33SR extends is orthogonal to the second electrode direction D2 that is the direction in which the drive electrode line 31DR extends. It is not necessary that these directions intersect. That is, the first direction in which one electrode line extends and the second direction in which the other electrode line extends may not be orthogonal to each other.

  In the configuration in which the first direction and the second direction are orthogonal to each other, an electrode line pattern in which the sensing electrode lines 33SR and the drive electrode lines 31DR are superimposed can be easily obtained. The alignment between the electrode line 33SR and the drive electrode line 31DR is easy.

  Further, the direction in which the sensing electrode lines 33SR extend and the direction in which the sensing electrode lines 33SR are arranged do not have to be orthogonal to each other, and these directions need only intersect. Similarly, the direction in which the drive electrode lines 31DR extend and the direction in which the drive electrode lines 31DR are arranged need not be orthogonal to each other, and may be any directions as long as they intersect. That is, the first direction in which one of the electrode lines extends and the first intersecting direction in which the one of the electrode lines is arranged only need to intersect each other, and the first direction in which the other electrode line extends is the same. The two directions and the second intersecting direction, which is the direction in which the other electrode lines are arranged, may be any direction as long as they intersect each other.

  Further, in the above embodiment, the first direction and the second cross direction are the same direction, and the second direction and the first cross direction are the same direction. However, all of these directions are different directions. There may be.

  -The sensing electrode line 33SR or the drive electrode line 31DR is not limited to a bent line shape formed by a combination of short line portions having a linear shape, and may be formed in a curved shape having a curved portion with a curvature.

  Only one of the pattern formed by the plurality of sensing electrode lines 33SR and the pattern formed by the plurality of drive electrode lines 31DR has the irregularly bent line shape described in the above embodiment. It may be a pattern composed of electrode lines. Further, the plurality of sensing electrode lines 33SR or the plurality of drive electrode lines 31DR may include an electrode line having a shape different from a bent line shape that bends irregularly. Even if not all of the electrode lines have a bent line shape that bends irregularly, the electrode line pattern including the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR includes a bent line that bends irregularly. If this is the case, the periodicity of the electrode line pattern will be lower than that of a conventional electrode line pattern composed of regular bent lines.

  However, in a configuration in which both the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR include electrode lines having a bent line shape that bends irregularly, only the plurality of sensing electrode lines 33SR or the plurality of drive electrode lines 33SR are provided. The periodicity of the electrode line pattern is lower than in a configuration in which only the electrode line 31DR includes a bent line-shaped electrode line that bends irregularly. Therefore, it is possible to prevent the moire from being visually recognized on various display panels 10.

  In the bending line that bends irregularly, the position of the bending portion, which is at least one of the first bending portion and the second bending portion, may be irregular in the order in which the bending portions are arranged. For example, in the sensing electrode line 33SR, each valley may be located on one straight line extending along the first electrode direction D1, and, on the drive electrode line 31DR, extending along the second electrode direction D2. Each valley may be located on two straight lines.

  In the sensing electrode line 33SR, the plurality of short line portions 33E may include a short line portion 33E having an inclination θ1 of 0 degree, and in the drive electrode line 31DR, the plurality of short line portions 31E include an inclination θ3. May be included at 0 °.

  Further, each of the sensing electrode line 33SR and the drive electrode line 31DR has a first bent portion and a second bent portion and has a bent line that is irregularly bent at least in a portion arranged in a region where moire is to be suppressed. What is necessary is just to have a shape.

  -The shape of the reference electrode wire 40KR is not limited to the shape of the above-described embodiment, and may be any shape as long as it is a periodic bent line. Specifically, the first virtual bent portions and the second virtual bent portions are alternately arranged one by one periodically along the reference electrode line 40KR, and the plurality of first virtual bent portions and the plurality of second virtual bent portions are arranged. The bent portions may be located on separate straight lines extending along the direction in which the reference electrode line 40KR extends. For example, the reference angle α is not bisected by a straight line passing through the reference bent portion 40Q and extending in a direction orthogonal to the direction in which the reference electrode line 40KR extends, and the angle formed by the adjacent reference short line portions 40E is May be formed from asymmetrical corners.

  FIG. 19 shows a result of analyzing, by FFT, an example of a pattern of the sensing electrode line 33SR created based on the reference electrode line 40KR having the asymmetric reference angle α. In the power spectrum shown in FIG. 19, the four directions in which the peak as the fundamental spatial frequency component and the group of peaks distributed in a band form appear in line symmetry with respect to each of the two coordinate axes as compared with FIG. Instead, these directions are only point-symmetric with respect to the origin. That is, these four directions may be any directions that include two sets of two directions that are point-symmetric with respect to the origin. Even in such a case, since the periodicity of the electrode line pattern is kept low, the effect according to the above (9) can be obtained.

  In the above-described embodiment, the shape of the sensing electrode line 33SR and the drive electrode line 31DR is such that the reference electrode has a periodic bent line shape designed so that moire is difficult to be visually recognized when superimposed with a pixel pattern having a predetermined period. Determined based on line 40KR. However, the present invention is not limited to this, as long as the inclination θ2 and θ4 change irregularly in the plurality of virtual line segments A3 and B3 included in the virtual lines A2 and B2 in the sensing electrode line 33SR and the drive electrode line 31DR. That is, if the sensing electrode lines 33SR and the drive electrode lines 31DR have a bent line shape that bends irregularly, the periodicity of the electrode line pattern is reduced, and the effect according to the above (1) is obtained. Can be

  As shown in FIG. 20, in the conductive film 21 forming the touch panel 20, the transparent substrate 31 and the transparent adhesive layer 32 may be omitted. In such a configuration, of the surface of the transparent dielectric substrate 33, the back surface facing the display panel 10 is set as the drive electrode surface 31S, and the drive electrode 31DP is located on the drive electrode surface 31S. The surface of the transparent dielectric substrate 33 which is the surface opposite to the back surface is the sensing electrode surface 33S, and the sensing electrode 33SP is located on the sensing electrode surface 33S. In such a configuration, the drive electrode 31DP is formed by, for example, patterning one thin film formed on one surface of the transparent dielectric substrate 33 by etching, and the sensing electrode 33SP is formed of, for example, a transparent dielectric substrate. One thin film formed on the other surface of the body substrate 33 is formed by patterning by etching.

  In the configuration where the sensing electrode lines 33SR and the drive electrode lines 31DR are formed on different base materials as in the above-described embodiment, as compared with the configuration where the electrode lines are formed on both surfaces of one base material. In addition, it is easy to form an electrode wire.

  21, as shown in FIG. 21, in the touch panel 20, the drive electrode 31DP, the transparent substrate 31, the transparent adhesive layer 32, the transparent dielectric substrate 33, the sensing electrode 33SP, and the transparent adhesive layer 23 are arranged in order from the components close to the display panel 10. , The cover layer 22 may be located.

  In such a configuration, for example, the drive electrode 31DP is formed on one surface serving as the drive electrode surface 31S of the transparent substrate 31, and the sensing electrode 33SP is formed on one surface serving as the sensing electrode surface 33S of the transparent dielectric substrate 33. Is done. Then, a surface of the transparent substrate 31 opposite to the drive electrode surface 31S and a surface of the transparent dielectric substrate 33 opposite to the sensing electrode surface 33S are bonded by the transparent adhesive layer 32. In this case, the transparent substrate 31, the transparent adhesive layer 32, and the transparent dielectric substrate 33 constitute a transparent dielectric layer, and the drive electrode surface 31S of the transparent substrate 31 is one of the first surface and the second surface. The sensing electrode surface 33S of the transparent dielectric substrate 33 is the other of the first surface and the second surface.

  The display panel 10 and the touch panel 20 need not be formed separately, and the touch panel 20 may be formed integrally with the display panel 10. In such a configuration, for example, in the conductive film 21, a plurality of drive electrodes 31DP are located on the TFT layer 13, while a plurality of sensing electrodes 33SP are located between the color filter substrate 16 and the upper polarizer 17. Configuration. Alternatively, an on-cell type configuration in which the conductive film 21 is located between the color filter substrate 16 and the upper polarizing plate 17 may be used. In such a configuration, a layer sandwiched between the drive electrode 31DP and the sensing electrode 33SP constitutes a transparent dielectric layer.

  A1, B1: Reference line, A2, B2: Virtual line, A3, B3: Virtual line segment, D1: First electrode direction, D2: Second electrode direction, ND: Capacitance detector, S: Displacement area, Pk: Reference Interval, H: reference width, W: reference cycle, α: reference angle, 10: display panel, 11: lower polarizing plate, 12: thin film transistor substrate, 13: TFT layer, 14: liquid crystal layer, 15: color filter layer, 15P: pixel, 16: color filter substrate, 17: upper polarizing plate, 20: touch panel, 21: conductive film, 22: cover layer, 23: transparent adhesive layer, 31: transparent substrate, 31DP: drive electrode, 31DR: drive Electrode wire, 31E: short wire portion, 31Q: bent portion, 33: transparent dielectric substrate, 33SP: sensing electrode, 33SR: sensing electrode wire, 33S: sensing electrode surface, 33E: short wire portion, 33Q ... Curved portion, 34 ... selection circuit, 35 ... detecting circuit, 36 ... control unit, 40KR ... reference electrode line, 40E ... reference short line section, 40Q ... reference bent portion 100 ... display device.

Claims (13)

A transparent dielectric layer having a first surface and a second surface opposite to the first surface;
A plurality of electrode lines extending along a first direction on the first surface of the transparent dielectric layer and arranged along a first intersecting direction intersecting the first direction;
On the second surface of the transparent dielectric layer, a plurality of electrode lines extending along a second direction intersecting the first direction and arranged along a second intersecting direction intersecting the second direction , With
At least one of the plurality of electrode lines located on the first surface is a first electrode line,
The first electrode line has a plurality of first bent portions and a plurality of second bent portions, and the first bent portion and the second bent portion alternate one by one along the first electrode line. Has a bent line shape lined with
A line segment virtually connecting the first bent portions adjacent to each other is a virtual line segment,
The plurality of virtual line segments connected along the first direction constitute a virtual line,
Wherein as the tilt with respect to the first direction of the virtual line segment varies irregularly to the order of arrangement of the virtual line in the virtual line, the first electrode wire is a conductive film that is configured ,
A virtual electrode line having a plurality of first virtual bends and a plurality of second virtual bends is a reference electrode line, and the first virtual bend and the second virtual bend correspond to the reference electrode line. Are arranged alternately one by one periodically along with, and the plurality of first virtual bending portions and the plurality of second virtual bending portions are located on separate straight lines extending in the first direction,
The bent line shape of the first electrode wire is such that the reference bent portion, which is at least one of the first virtual bent portion and the second virtual bent portion, is arranged in the order of the reference bent portion in the reference electrode line. The shape is irregularly displaced,
The plurality of electrode lines located on the first surface include a plurality of the first electrode lines arranged along the first cross direction,
The plurality of first electrode lines extend along the first direction, and the plurality of reference electrode lines arranged at predetermined intervals in the first intersecting direction form a line of the reference bent portion. The reference bending portion has a shape that is irregularly displaced with respect to the order,
The width occupied by each reference electrode line in the first cross direction is a reference width, the predetermined interval is a reference interval, and an occupancy ratio, which is a ratio of the reference width to the reference interval, is 0.7 or more. 3 or less,
The distance between two reference bent portions adjacent in the first direction in the reference electrode line is a reference period,
A diamond-shaped virtual region having a diagonal line extending in the first direction and a diagonal line extending in the first intersecting direction around the reference bent portion before the displacement is a displacement region,
The reference bent portion after the displacement is located in the displacement region,
The length of the diagonal line extending in the first direction is 0.1 times or more and 0.5 times or less of the reference period,
The length of the diagonal line extending in the first cross direction is 0.2 times or more and 1.0 times or less of the reference interval.
Conductive film . The first electrode line is a set of a plurality of short line portions having a linear shape connecting the first bent portion and the second bent portion adjacent to each other along the first electrode line,
In the plurality of short line portions, a length of the short line portion and an inclination of the short line portion with respect to the first direction change irregularly in an order in which the short line portions are arranged in the first electrode line. Item 7. The conductive film according to Item 1. The first electrode line is configured such that all of the plurality of short line portions intersect or contact a single reference line which is a virtual straight line extending along the first direction. The conductive film as described in the above. The plurality of electrode lines located on the first surface include a plurality of the first electrode lines arranged along the first cross direction,
The conductive film according to claim 3, wherein the reference lines arranged for each of the plurality of first electrode lines are arranged at predetermined intervals along the first cross direction. The plurality of electrode lines located on the first surface include a first electrode line group including the plurality of first electrode lines arranged along the first cross direction,
In the first electrode line group, a variation in the total number of the first bent portion and the second bent portion between the first electrode lines is 5% or less. 4. The conductive film according to claim 1. The angle of the connected at the reference electrode line through the reference bent portion segments, the electrically conductive film according to claim 1 or less 150 degrees 95 degrees. In a power spectrum obtained by a two-dimensional Fourier transform of the plurality of electrode lines located on the first surface,
Four directions extending radially from the origin, and the four directions including two sets of two directions that are point-symmetric with respect to the origin are periodic directions;
The angle of the first electrode line at the first bent portion, the angle of the first electrode line at the second bent portion, the distance between the first bent portions adjacent to each other, the second bent portion adjacent to each other The conductive film according to claim 1, wherein a plurality of the first electrode lines are configured such that a distance between them and peaks derived from these periodicities are distributed in a band shape along each periodic direction. In the power spectrum, the plurality of first electrode lines are such that a peak distributed in the band shape includes a peak stronger than a peak derived from the periodicity only in the first cross direction in the plurality of first electrode lines. The conductive film according to claim 7 , which is configured. At least one of the plurality of electrode lines located on the second surface is a second electrode line,
The second electrode line has a plurality of first bent portions and a plurality of second bent portions, and the first bent portion and the second bent portion alternate one by one along the second electrode line. Has a bent line shape lined with
A line segment that virtually connects the first bent portions adjacent to each other with the second electrode line is a virtual line segment, and the plurality of virtual line segments connected along the second direction is a virtual line. Make up,
The second electrode lines, wherein any inclination with respect to the second direction of the virtual line segment of which claims 1-8 which is configured irregularly changes to the order of arrangement of the virtual line in the virtual line The conductive film according to claim 1. Wherein a plurality of electrode wires positioned on the first surface and the plurality of electrode lines positioned on the second surface, conductive according to any one of claims 1 to 9 formed on the different substrates Film. The conductive film according to any one of claims 1 to 10 , wherein the first direction and the second direction are orthogonal to each other. The conductive film according to any one of claims 1 to 11 ,
A cover layer covering the conductive film,
A touch panel comprising: a peripheral circuit that measures a capacitance between the electrode line disposed on the first surface and the electrode line disposed on the second surface. A display panel that has a plurality of pixels arranged in a lattice and displays information;
A touch panel that transmits the information displayed on the display panel,
A control unit for controlling the driving of the touch panel,
The display device according to claim 12 , wherein the touch panel is the touch panel according to claim 12 .