JP2016212517A - Conductive film, touch panel, and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive film, touch panel, and display device that can suppress moire from being visually recognized when a plurality of display panels having the sizes and resolutions different from each other are overlapped.SOLUTION: A sensing electrode wire 33SR has a bent line shape including a plurality of bent parts; the sensing electrode wire 33SR is configured such that the distance in a first electrode direction D1 and the distance in a second electrode direction D2 in the bent parts adjacent along the sensing electrode wire are irregularly changed with respect to the arrangement order of the bent parts in the sensing electrode wire 33SR.SELECTED DRAWING: Figure 12

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 device 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 overlaid on the display panel. The display surface of the display panel has a large display device such as a display used in a personal computer or a smart TV from a small display device such as a PDA (personal digital assistant) or a mobile phone. Until it is, it varies according to the size of the display device. Therefore, the size of the touch panel having the operation surface having the same size as the display surface is also various. In addition, the resolution of the display panel varies depending on the application of the display device.

  As a method for detecting a contact position of a finger or the like on a touch panel, a capacitance method that detects a finger touching 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 the first direction, a plurality of second electrodes extending along the second direction orthogonal to the first direction, And a transparent dielectric layer sandwiched between the first electrode and the second electrode. Then, a change in electrostatic capacitance between one first electrode and each of the plurality of second electrodes is detected for each first electrode, and a contact position such as a finger on the operation surface is detected.

  In an 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 comprises 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 a metal as the material of the electrode wire, it is possible to obtain quick response and high resolution when detecting the contact position, and it is possible to increase the size of the touch panel and reduce manufacturing costs.

  By the way, in the configuration in which the electrode lines are formed by a metal that absorbs or reflects visible light, the plurality of first electrode lines and the plurality of second electrode lines are orthogonal to each other when viewed from the operation surface of the touch panel. The pattern is visible. 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 between the pixels adjacent to each other in the second direction, and the interval between the second electrode lines adjacent to each other is also set. This is different from the interval in the first direction between adjacent pixels. Then, when viewed from the operation surface of the touch panel, the lattice-like periodic structure formed by the first electrode line and the second electrode line overlaps with the lattice-like periodic structure that partitions the pixels, thereby providing two periodic structures. Deviation of the case may induce moire. When the moiré is visually recognized, the quality of the image visually recognized by the display device is deteriorated.
As one method for suppressing such moiré from being visually recognized, there is a method for suppressing the generation of moiré by breaking the periodicity of the periodic structure of the electrode wire.

  For example, in the touch panel described in Patent Document 1, each of the first electrode line and the second electrode line is a polygonal line, and the periodic structure formed from these electrode lines is a polygonal repeating structure different from a rectangle. Have. As a result, the periodicity of the periodic structure of the electrode lines is broken as compared with the lattice-shaped periodic structure. Further, for example, in the conductive film described in Patent Document 2, since the electrode lines have partially different line widths, the periodicity of the periodic structure of the electrode lines collapses compared to the case where the line width is constant. Yes. Further, for example, in the conductive film described in Patent Document 3, the periodicity of the periodic structure of the electrode lines is broken due to the irregularities of the contours of the electrode lines.

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

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

On the other hand, the electrode line patterns described in Patent Documents 1 to 3 have periodicity that can be recognized visually even though the periodicity is lowered, but when these patterns are used, The degree of occurrence of moiré 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 moiré for a plurality of display panels, the degree of moiré is evaluated for each periodic structure of pixels, that is, for each display panel size and resolution, and the electrode line pattern is precisely It is necessary to make a design. And the display panel which can suppress a moire by the electrode line pattern designed in this way is limited to the display panel used as the evaluation object at the time of design.
Therefore, there is a demand for an electrode line pattern that can suppress the moire from being visually recognized on a variety of display panels having different sizes and resolutions.

  It is an object of the present invention to provide a conductive film, a touch panel, and a display device that can suppress the moire from being visually recognized when overlapping with a plurality of display panels having different sizes and resolutions.

  A conductive film for solving the above-described problems includes a transparent dielectric layer having a first surface and a second surface opposite to the first surface, and the first of the transparent dielectric layer. A plurality of electrode lines extending along a first direction and extending along a first intersecting direction intersecting the first direction, and the second surface of the transparent dielectric layer; A plurality of electrode lines extending along a second direction intersecting the direction and arranged along a second intersecting direction intersecting the second direction. At least one of the plurality of electrode lines located on the first surface is a first electrode line, and the first electrode line has a bent line shape including a plurality of bent portions, The distance in the first direction and the distance in the first intersecting direction between the bent portions adjacent to each other along the electrode lines vary irregularly with respect to the order in which the bent portions are arranged in the first electrode lines. Thus, the first electrode line is configured.

  According to the above configuration, the electrode line pattern includes the first electrode line having a bent line shape that bends irregularly. For this reason, the above configuration can reduce the spatial periodicity of the electrode line pattern as compared with the conventional grid-like electrode line pattern and the electrode line pattern composed of regular bent lines. Thus, regarding the moire suppression, the influence on the periodicity of the pixel pattern of the display panel can be suppressed to a low level. Therefore, even when a touch panel using a conductive film having such an electrode line pattern is overlapped with a plurality of display panels having different sizes and resolutions, it is possible to suppress the 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 conductive film, the bent line shape is a broken line shape in which a plurality of short line portions having a linear shape are connected via the bent portion, and the plurality of short line portions are straight lines inclined with respect to the first direction. It is preferable to include the short line portion having a shape.

  According to the above configuration, since the first electrode line is configured by a combination of a plurality of short line portions including the short line portion inclined with respect to the first direction, a bent line shape that is irregularly bent is accurately realized.

  In the conductive film, the plurality of electrode lines positioned on the first surface includes a first electrode line group including a plurality of first electrode lines arranged along the first intersecting direction, In one electrode line group, it is preferable that variation in the number of the bent portions between the first electrode lines is 5% or less.

  According to the above configuration, the first electrode lines adjacent to each other can be prevented from crossing or contacting each other. For this reason, it is possible to suppress the electrode lines from being easily visually recognized due to the electrode lines becoming thick at the corners formed at the intersections or contact portions of the electrode lines.

  In the conductive film, one bending portion is provided in each virtual region, with respect to a plurality of virtual regions each having the same size and positioned at predetermined intervals along the first direction. Preferably it is located.

  Since no other bent portion is located in the line segment connecting the adjacent bent portions, the irregularity of the bent line shape is lower as the length of such a line segment is longer. In this respect, according to the above configuration, since the position of the bent portion is suppressed from being extremely biased within one first electrode line, the length of the line segment connecting the adjacent bent portions is extremely long compared to the configuration. An irregular bent line shape can be accurately realized.

  In the conductive film, a virtual electrode line that extends linearly along the first direction and is arranged at a reference interval that is a predetermined interval in the first intersecting direction is a reference electrode line, and the first electrode The bent line shape of the electrode line is arranged in the order of the displacement points in the reference electrode line so that the positions of the plurality of displacement points located on the reference electrode line are the positions of the bent portions. On the other hand, the displacement point distance, which is a shape irregularly displaced and is the distance between the displacement points before displacement adjacent to each other, is preferably 0.90 times to 1.10 times the reference interval.

  According to the above configuration, since the displacement point distance is 0.90 times or more of the reference interval, the number of bent portions does not increase too much in the first electrode line. Therefore, as a result of suppressing the proportion of the electrode lines on the first surface from being excessive, it is possible to suppress a decrease in light transmittance and an increase in resistance value in the conductive film. On the other hand, since the displacement point distance is 1.10 times or less of the reference interval, the number of displacement points is sufficiently secured, and the periodicity of the electrode line pattern is sufficiently lowered due to the displacement of the displacement points.

  In the conductive film, a virtual area having a square shape having a side extending along the first direction and a side extending along the first intersecting direction around the displacement point before the displacement is a displacement region. It is. The displacement point after the displacement is located in the displacement region, and the length of one side of the displacement region is preferably 0.30 times or more and 0.80 times or less of the displacement point distance. .

According to the above configuration, the intensity of the peak appearing in the low frequency region in the Fourier analysis of the image obtained by superimposing the electrode line pattern created based on the reference electrode line and the pixel pattern can be suppressed low. Accordingly, since the contrast of the moire generated when the electrode line pattern and the pixel pattern are superimposed is suppressed to be low, the moire becomes difficult to be visually recognized. In addition, it is difficult to visually recognize the grain pattern due to the deviation of the electrode wires.
In the conductive film, the length of one side of the displacement region is preferably 0.55 times or more and 0.80 times or less of the displacement point distance.
According to the said structure, since the intensity | strength of the said peak is suppressed further low, it becomes difficult to visually recognize a moire.

  In the conductive film, at least one of the plurality of electrode lines located on the second surface is a second electrode line, and the second electrode line has a bent line shape including a plurality of bent portions. The distance in the second direction between the bent portions adjacent to each other along the second electrode line and the distance in the second intersecting direction are not relative to the order in which the bent portions are arranged in the second electrode line. The second electrode line is preferably configured so as to change regularly.

  According to the above configuration, in addition to the plurality of electrode lines positioned on the first surface, the plurality of electrode lines positioned on the second surface also include an electrode wire having a bent line shape that bends irregularly. The periodicity of the line pattern is further reduced. Therefore, it is possible to suppress the moire from being visually recognized on more various display panels.

In the conductive film, the plurality of electrode lines positioned on the first surface and the plurality of electrode lines positioned on the second surface are preferably formed on different substrates.
According to the said structure, compared with the structure by which an electrode wire is formed in both surfaces of one base material, formation of an electrode wire is easy.

  The touch panel for solving the above-described problems is between the conductive film, a cover layer covering the conductive film, an electrode line disposed on the first surface, and an electrode line disposed on the second surface. And a peripheral circuit for measuring the electrostatic capacity.

  According to the above configuration, even when the touch panel is overlapped with a plurality of display panels having different sizes and resolutions, it is possible to suppress the moiré from being visually recognized. It is possible to suppress the moire from being visually recognized on the panel.

A display device for solving the above problems includes a display panel having a plurality of pixels arranged in a grid and displaying information, a touch panel that transmits the information displayed on the display panel, and driving the touch panel And the control panel is the touch panel.
According to the above configuration, since it is possible to suppress the moiré from being visually recognized on the display device, it is possible to suppress deterioration in display quality.

In the display device, 15 ° ≦ Φ ≦ 40 °, 50 ° ≦ when an angle formed by the first direction and the direction in which the pixels are arranged as viewed from the direction facing the transparent dielectric layer is Φ. It is preferable to satisfy any of Φ ≦ 75 °, −40 ° ≦ Φ ≦ −15 °, and −75 ° ≦ Φ ≦ −50 °.
According to the above configuration, it is possible to accurately suppress the moire from being visually recognized when the electrode line pattern and the pixel pattern are superimposed.
In the display device, it is preferable that the second direction has −Φ as an angle formed with the direction in which the pixels are arranged as viewed from the direction facing the transparent dielectric layer.

  According to the above configuration, it is possible to accurately suppress the moire from being visually recognized when the electrode line pattern and the pixel pattern are superimposed, and to set the angle relationship between the first direction, the second direction, and the pixel arrangement direction. The load of is reduced.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that a moire is visually recognized at the time of superimposition with an electrode line pattern and several display panels from which a magnitude | size and a resolution mutually differ.

It is sectional drawing which shows the cross-section in one Embodiment of a display apparatus. It is a top view which shows the planar structure of the electroconductive film in one Embodiment. It is a top view which shows the pixel array of the display panel in one Embodiment. It is a mimetic diagram for explaining the electric composition of the touch panel in one embodiment. It is a figure which shows an example of the electrode line pattern comprised from the conventional sensing electrode line and drive electrode line. It is a figure which shows an example of the electrode line pattern comprised from the conventional sensing electrode line and drive electrode line. It is a figure which shows an example of the electrode line pattern comprised from the conventional sensing electrode line and drive electrode line. It is a figure which shows the structure of the sensing electrode wire in one Embodiment. It is a figure which shows the structure of the sensing electrode wire in one Embodiment. It is a figure which shows the structure of the drive electrode line in one Embodiment. It is a figure which shows the structure of the drive electrode line in one Embodiment. It is a top view which shows the one part planar structure of the electroconductive film in one Embodiment, Comprising: It is a figure which shows the structure of the electrode line pattern comprised from a sensing electrode line and a drive electrode line. It is a figure which shows the structure of the electrode line pattern comprised from the sensing electrode line and drive electrode line of a modification. It is a figure which shows the structure of the electrode line pattern comprised from the sensing electrode line and drive electrode line of a modification. It is a figure which shows the relationship between the 1st electrode direction and 2nd electrode direction, and 1st pixel direction in one Embodiment. It is a figure which shows the structure of the reference electrode line in one Embodiment. It is a figure which shows an example of the sensing electrode line created by the displacement of the displacement point in the reference | standard electrode line of one Embodiment with a displacement area | region. It is a figure which shows the relationship between the magnitude | size of the displacement area | region in one Embodiment, and the peak intensity which appears by the two-dimensional Fourier transform of the image which overlap | superposed the electrode line pattern and the pixel pattern. It is sectional drawing which shows the cross-section of the display apparatus in a modification. It is sectional drawing which shows the cross-section of the display apparatus in a modification.

  With reference to FIGS. 1-18, the electroconductive film of one Embodiment, a touchscreen, and a display apparatus are demonstrated.

[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 laminated body in which, for example, a display panel 10 that is a liquid crystal panel and a touch panel 20 are bonded together by a single transparent adhesive layer (not shown). And a control unit for controlling driving of the touch panel 20. Note that 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 in the following order from the components far from the touch panel 20. That is, the lower polarizing plate 11, the thin film transistor (hereinafter referred to as 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 positioned in order from the touch panel 20. Yes.

  Among these, in the TFT layer 13, pixel electrodes constituting subpixels are located in a matrix. Further, the black matrix included in the color filter layer 15 has a lattice shape composed of a plurality of unit lattices having a rectangular shape. The black matrix divides a plurality of regions having a rectangular shape facing each of the sub-pixels by such a lattice shape, and white light is emitted in any of red, green, and blue in each region defined by the black matrix. There is a colored layer that changes the color of light.

  If the display panel 10 is an EL panel that outputs colored light and has 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 portion between adjacent pixels in the EL panel functions as a black matrix. Further, 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 laminated body in which a conductive film 21 and a cover layer 22 are bonded together by a transparent adhesive layer 23, and transmits light that transmits information displayed on the display panel 10. have.

  Specifically, the transparent substrate 31, the plurality of drive electrodes 31 DP, the transparent adhesive layer 32, the transparent dielectric substrate 33, and the plurality of sensing electrodes are sequentially arranged from the components that make up the touch panel 20, closer 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 light transmittance and insulating properties that transmit information such as an image displayed on the display surface of the display panel 10 and is superimposed on the entire display surface. The transparent substrate 31 is composed of a base material such as a transparent glass substrate, a transparent resin film, or a silicon substrate, for example. 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 base material, or a multilayer structure in which two or more base materials are stacked.

  A 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. A plurality of drive electrodes 31DP and a portion of the drive electrode surface 31S where the drive electrode 31DP is not located are bonded to the transparent dielectric substrate 33 by one transparent adhesive layer 32.

  The transparent adhesive layer 32 has a light transmission property that transmits 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 optical transparency that transmits information such as an image displayed on the display surface, and a relative dielectric constant suitable for detecting capacitance between electrodes. The transparent dielectric substrate 33 is composed of a base material such as a transparent glass substrate, a transparent resin film, or a silicon substrate, for example. Examples of the resin used for the transparent dielectric substrate 33 include PET, PMMA, PP, PS, and the like. The transparent dielectric substrate 33 may have a single-layer structure composed of one base material, or 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, which is the surface facing 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 the portion where the sensing electrode 33SP is 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 transmission property that transmits 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 adhesive used as the transparent adhesive layer 23 may be a wet laminate adhesive, a dry laminate adhesive, or a hot laminate 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 the surface of the touch panel 20 and functions as the operation surface 20S.

  In addition, the transparent contact bonding layer 23 may be omitted among the said components. 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. A plurality of sensing electrodes 33SP may be formed by patterning.

  In manufacturing the touch panel 20, a method in which the conductive film 21 and the cover layer 22 are bonded together by the transparent adhesive layer 23 may be employed. As another example different from such a manufacturing method, A manufacturing method may be adopted. That is, a thin film layer made of a conductive metal such as copper is formed directly or through an underlayer on the cover layer 22 such as a resin film, and the sensing electrode 33SP has a pattern shape on the thin film layer. A 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.

[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. 2 is a view of the conductive film 21 as viewed from the direction facing the surface of the transparent dielectric substrate 33, and each of the belt-like regions extending along the horizontal direction surrounded by the two-dot chain line is one Each of the strip-shaped regions extending along the vertical direction surrounded by the two-dot chain line indicates a region where one drive electrode 31DP is disposed. The numbers of sensing electrodes 33SP and drive electrodes 31DP are shown in a simplified manner.

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

  As shown in FIG. 2, in 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 insulated from another adjacent sensing electrode 33SP.

  Each sensing electrode 33SP is composed of a plurality of sensing electrode lines 33SR, and a sensing electrode line group that is a set of the plurality of sensing electrode lines 33SR is arranged on the sensing electrode surface 33S. The forming material of the sensing electrode line 33SR is a metal film such as copper, silver or aluminum, and the sensing electrode line 33SR is formed by patterning the metal film by etching, for example. 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 the sensing pad 33P, and a current value is measured by the detection circuit.

  In the drive electrode surface 31S of the transparent substrate 31, each of the plurality of drive electrodes 31DP has a strip 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 includes a plurality of drive electrode lines 31DR, and a drive electrode line group that is a set of the plurality of drive electrode lines 31DR is disposed on the drive electrode surface 31S. As a material for forming the drive electrode line 31DR, a metal film such as copper, silver, or aluminum is used. The drive electrode line 31DR is formed, for example, by patterning a 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 the drive pad 31P, and is selected by the selection circuit by receiving a drive signal output from the selection circuit.

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

The method for forming the sensing electrode line 33SR and the drive electrode line 31DR is not limited to the above-described etching, and other methods such as a printing method may be used.
[Plane structure of display panel]
With reference to FIG. 3, 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.

  As shown in FIG. 3, the black matrix 15a of the color filter layer 15 includes a plurality of units having a rectangular shape arranged along the first pixel direction G1 and the second pixel direction G2 orthogonal to the first pixel direction G1. It has a lattice pattern composed of lattices. One pixel 15P is composed of three unit grids that are continuous along the first pixel direction G1, and the plurality of pixels 15P are arranged in a grid pattern along the first pixel direction G1 and the second pixel direction G2. Has been.

  Each of the plurality of 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 pixel direction G1. The plurality of red coloring layers 15R are continuously arranged along the second pixel direction G2, and the plurality of green coloring layers 15G are arranged continuously along the second pixel direction G2, and the plurality of blue coloring layers 15B. Are continuously arranged along the second pixel direction G2.

  One red colored layer 15R, one green colored layer 15G, and one blue colored layer 15B constitute one pixel 15P, and the plurality of pixels 15P includes the red colored layer 15R, green in the first pixel direction G1. The colored layers 15G and the blue colored layer 15B are arranged along the first pixel direction G1 while maintaining the order of arrangement. That is, the first pixel direction G1 is a direction in which the pixels 15P are arranged. In other words, the plurality of pixels 15P are arranged in a stripe shape extending along the second pixel direction G2.

  The width along the first pixel direction G1 in the pixel 15P is the first pixel width P1, and the width along the second pixel direction G2 in the pixel 15P 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, the electrical configuration of touch panel 20 will be described together with the function of the control unit included in display device 100. Hereinafter, as an example of the capacitive touch panel 20, an electrical configuration of the mutual capacitive touch panel 20 will be described.

  As illustrated 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. Yes.

  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 toward 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 scanning timing signal for causing the detection circuit 35 to sequentially scan the detection target from the first sensing electrode 33SP1 toward the nth sensing electrode 33SPn.

  The selection circuit 34 starts generating a drive signal based on the start timing signal output from the control unit 36, and sets the output destination of the drive signal to the first drive electrode based on the scanning timing signal output from the control unit 36. Scanning from 31DP1 toward the nth drive electrode 31DPn.

  The detection circuit 35 includes a signal acquisition unit 35a and a signal processing unit 35b. Based on the start timing signal output from the control unit 36, the signal acquisition unit 35a starts acquiring a current signal that is an analog signal generated in each sensing electrode 33SP. Then, the signal acquisition unit 35a scans the current signal acquisition source 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 capacitance, thereby changing the capacitance between the drive electrode 31DP and the sensing electrode 33SP. Measure.

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

  In the above description, the first electrode direction D1 and the first pixel direction G1 are the same direction, and the second electrode direction D2 and the second pixel direction G2 are the same direction. The basic structure of the conductive film 21, the touch panel 20, and the display device 100 is described.

[Reference example of electrode wire pattern]
The electrode line pattern of a reference example which is a reference when describing the electrode line pattern of the present embodiment, and the positional relationship between the electrode line pattern and the pixel pattern will be described with reference to FIGS. 5 to 7, the electrode line pattern is indicated by a bold line, and the pixel pattern is indicated by a broken line.

  In the electrode line pattern shown in FIG. 5, the sensing electrode line 53SR has a linear shape extending along the first electrode direction D1, and the plurality of sensing electrode lines 53SR have a predetermined interval between the sensing electrode lines 53SR. Are aligned along the second electrode direction D2. The drive electrode line 51DR has a linear shape extending along the second electrode direction D2, and the plurality of drive electrode lines 51DR are spaced in the first electrode direction D1 with a predetermined interval between the drive electrode lines 51DR. It is lined up along. The first electrode direction D1 and the second electrode direction D2 are orthogonal to each other. Thereby, rectangular electrode line patterns are formed.

  The electrode line pattern shown in FIG. 5 is such that when the touch panel 20 and the display panel 10 are overlapped, the extending direction of the sensing electrode line 53SR and the extending direction of the drive electrode line 51DR are parallel to the extending direction of the pixel array. Has been placed. That is, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the first electrode direction D1 coincides with one of the first pixel direction G1 and the second pixel direction G2, and the second electrode direction D2 The other of the one pixel direction G1 and the second pixel direction G2 coincides. When the electrode line pattern and the pixel pattern are overlapped in this way, moire is likely to be visually recognized due to a shift between the periodic structure of the electrode line pattern and the periodic structure of the pixel pattern. The finer the period of the stripes that are visually recognized as moire, the more difficult it is to see the moire. Although the period of such stripes can be adjusted by the interval between the sensing electrode lines 53SR and the interval between the drive electrode lines 51DR, these intervals. There is a limit in suppressing the moire from being visually recognized by the adjustment.

  The electrode line pattern itself shown in FIG. 6 is the same pattern as the electrode line pattern shown in FIG. In the electrode line pattern shown in FIG. 6, when the touch panel 20 and the display panel 10 are overlapped, the extending direction of the sensing electrode line 53SR and the extending direction of the drive electrode line 51DR are inclined with respect to the extending direction of the pixel array. Is arranged. Specifically, the electrode line pattern and the pixel pattern are arranged so that the angle formed by the first electrode direction D1 and the first pixel direction G1 is an angle α different from 0 ° and 90 °. .

  When the electrode line pattern and the pixel pattern are overlapped in this way, the moire period can be further adjusted by adjusting the angle α as compared with the example of FIG. 5. There is a limit to suppressing the moire from being visually recognized by adjustment.

  In the electrode line pattern shown in FIG. 7, the first electrode direction D1 that is the direction in which the sensing electrode line 53SR extends and the second electrode direction D2 that is the direction in which the drive electrode line 51DR extends have an angle different from 90 °. There is no. In detail, the sensing electrode line 53SR extends along the first electrode direction D1, and the plurality of sensing electrode lines 53SR are orthogonal to the first electrode direction D1 with a predetermined interval between the sensing electrode lines 53SR. They are arranged along one parallel direction H1. In addition, the drive electrode line 51DR extends along the second electrode direction D2, and the plurality of drive electrode lines 51DR are in a second parallel direction perpendicular to the second electrode direction D2 with a predetermined interval between the drive electrode lines 51DR. It is lined up along the direction H2. And the 1st electrode direction D1 and the 2nd electrode direction D2 are not mutually orthogonal, but cross | intersect. Thus, an electrode line pattern in which rhombuses are arranged is formed.

  Furthermore, in the electrode line pattern shown in FIG. 7, when the touch panel 20 and the display panel 10 are overlapped, the angle formed by the first electrode direction D1 and the first pixel direction G1 is the angle β, and the second electrode direction D2 The electrode line pattern and the pixel pattern are arranged so that the angle between the first pixel direction G1 and the first pixel direction G1 is an angle γ. The angles β and γ are angles different from 0 ° and 90 °.

  When the electrode line pattern and the pixel pattern are overlapped in this way, the moire period can be further adjusted by adjusting the angle β and the angle γ as compared with the examples of FIGS. After all, there is a limit to suppressing the moire from being visually recognized by adjusting the angle.

  As described above, in order to suppress the moire from being visually recognized in the electrode line pattern of the reference example, the interval between the electrode lines for each pixel pattern, that is, for each size or resolution of the display panel 10, It was necessary to precisely set the overlapping angle of the electrode line pattern and the pixel pattern. In addition, the above-described intervals and angles that can suppress moiré do not always exist, and there is a limit to suppressing the moiré from being visually recognized.

  Compared with the pattern of such a reference example, the electrode line pattern of this embodiment is comprised from the electrode wire which has an irregular shape, and the periodicity of the electrode line pattern is suppressed low. Hereinafter, the electrode line pattern of the present embodiment will be described in detail.

[Configuration of sensing electrode]
The configuration of the sensing electrode 33SP will be described with reference to FIGS.
As shown in FIG. 8, each of the plurality of sensing electrode wires 33SR has a bent line shape including a plurality of bent portions 33Q. The plurality of sensing electrode lines 33SR are arranged along the second electrode direction D2 with an interval between the sensing electrode lines 33SR. The sensing electrode lines 33SR adjacent to each other preferably do not cross or contact each other in the sensing electrode 33SP, and are insulated from each other between the sensing electrodes 33SP. Each of the plurality of sensing electrode lines 33SR constituting one sensing electrode 33SP is connected to the sensing pad 33P at one end in the first electrode direction D1.

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

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

  The angle of the short line portion 33E with respect to the reference line A1 that is a straight line extending along the first electrode direction D1 is the inclination θ1, and the plurality of short line portions 33E include the short line portions 33E having different inclinations θ1. . That is, the inclination θ1 is not constant in the plurality of short line portions 33E. The plurality of short line portions 33E include a short line portion 33E having a positive inclination θ1 and a short line portion 33E having a negative inclination θ1. The plurality of short line portions 33E may include a short line portion 33E having an inclination θ1 of 0 °.

  Among the plurality of short line portions 33E arranged along the first electrode direction D1, the absolute value of the inclination θ1 varies irregularly with respect to the arrangement order of the short line portions 33E. Among the plurality of short line portions 33E arranged along the first electrode direction D1, the sign of the inclination θ1 may vary irregularly with respect to the order of arrangement of the short line portions 33E. That is, one sensing electrode line 33SR may have a portion in which short line portions 33E having a positive inclination θ1 are continuously arranged along the first electrode direction D1, or a short line having a negative inclination θ1. The portion 33E may have a portion that is continuously arranged. Further, one sensing electrode line 33SR may have a portion in which short line portions 33E having a positive inclination θ1 and short line portions 33E having a negative inclination θ1 are alternately arranged.

  In such a sensing electrode line 33SR, the distance d1 along the first electrode direction D1 between the bent parts 33Q adjacent to each other along the sensing electrode line 33SR is irregular with respect to the order in which the bent parts 33Q are arranged in the sensing electrode line 33SR. Has changed. Further, the distance d2 along the second electrode direction D2 between the bent portions 33Q adjacent to each other along the sensing electrode line 33SR changes irregularly with respect to the order in which the bent portions 33Q are arranged in the sensing electrode line 33SR.

  When the number of bent portions 33Q of one sensing electrode line 33SR is the number of bent portions, the variation in the number of bent portions among the plurality of sensing electrode wires 33SR, that is, the variation in the number of bent portions in the sensing electrode group is 5% or less. It is preferable that the number of bent portions of each sensing electrode wire 33SR is more equal. For all sensing electrode lines 33SR included in the plurality of sensing electrodes 33SP, an arithmetic average value of the number of bent portions for each sensing electrode line 33SR is defined as an average value Save. For all 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 as 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 defined as a minimum value Asmin. At this time, the variation in the number of bent parts is given by (Asmax + Asmin) / (2 × Aave) × 100.

  If the variation in the number of bent portions between the plurality of sensing electrode lines 33SR is within the above range, the adjacent sensing electrode lines 33SR can be prevented from crossing or contacting each other. When the sensing electrode lines 33SR adjacent to each other cross or come into contact with each other, the short line portions 33E of the sensing electrode lines 33SR intersect with each other to form a corner portion at the intersecting portion or the contact portion. When the sensing electrode line 33SR is formed by etching, the electrode line becomes thick at the corner, and the corner is easily visually recognized. Therefore, it is preferable that the number of corners is small, and for that purpose, it is preferable that the number of the intersecting portions and the contact portions is small.

  As shown in FIG. 9, a plurality of virtual regions R1 each having the same size and arranged along the first electrode direction D1 are overlapped with each sensing electrode line 33SR along each sensing electrode line 33SR. Deploy. That is, the virtual region R1 is located one by one at predetermined intervals along the first electrode direction D1. The virtual region R1 located at the end may be disposed at the end of the sensing electrode line 33SR, or may be disposed at a position away from the end of the sensing electrode line 33SR. When such a virtual region R1 is set, one bent portion 33Q is located in each of the plurality of virtual regions R1.

  Note that the sensing electrode line 33SR preferably has a line width of 6 μm or less. If the line width of the sensing electrode line 33SR is 6 μm or less, when the electrode line pattern and the pixel pattern are overlaid, the contrast of the stripes that are visually recognized as moire can be suppressed, so that the moire is hardly visually recognized. Moreover, since it is suppressed that an electrode line is visually recognized by permeation | transmission and reflection of light, it is suppressed that the display quality in the display apparatus 100 falls.

[Configuration of drive electrode]
The configuration of drive electrode 31DP will be described with reference to FIGS.
As shown in FIG. 10, each of the plurality of drive electrode lines 31DR has a bent line shape including a plurality of bent portions 31Q. The plurality of drive electrode lines 31DR are arranged along the first electrode direction D1 with an interval between the drive electrode lines 31DR. Each of the plurality of drive electrode lines 31DR constituting 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 short line portions 31E having a linear shape. Each short line portion 31E connects the bent portions 31Q adjacent to each other along the drive electrode line 31DR. That is, each drive electrode line 31DR includes a plurality of short line portions 31E arranged along the second electrode direction D2, and a bent portion 31Q that is a portion where two adjacent short line portions 31E are connected to each other. 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 connected via the bent portion 31Q and extend along the second electrode direction D2.

  The short line portion 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. Among the plurality of short line portions 31E arranged along the second electrode direction D2, the length L2 varies irregularly with respect to the arrangement order of the short line portions 31E.

  The angle of the short line portion 31E with respect to the reference line B1 that is a straight line extending along the second electrode direction D2 is the inclination θ2, and the plurality of short line portions 31E include the short line portions 31E having different inclinations θ2. . That is, the inclination θ2 is not constant in the plurality of short line portions 31E. The plurality of short line portions 31E include a short line portion 31E having a positive inclination θ2 and a short line portion 31E having a negative inclination θ2. The plurality of short line portions 31E may include a short line portion 31E having an inclination θ2 of 0 °.

  Among the plurality of short line portions 31E arranged along the second electrode direction D2, the absolute value of the inclination θ2 varies irregularly with respect to the arrangement order of the short line portions 31E. Of the plurality of short line portions 31E arranged along the second electrode direction D2, the sign of the inclination θ2 may change irregularly with respect to the order of arrangement of the short line portions 31E. That is, one drive electrode line 31DR may have a portion in which short line portions 31E having a positive inclination θ2 are continuously arranged along the second electrode direction D2, or a short line having a negative inclination θ2. The portion 31E may have a portion that is continuously arranged. Further, one drive electrode line 31DR may have a portion in which short line portions 31E having a positive inclination θ2 and short line portions 31E having a negative inclination θ2 are alternately arranged.

  In such drive electrode line 31DR, the distance d3 along the second electrode direction D2 between the bent portions 31Q adjacent to each other along the drive electrode line 31DR is irregular with respect to the order in which the bent portions 31Q are arranged in the drive electrode line 31DR. Has changed. Further, the distance d4 along the first electrode direction D1 between the bent portions 31Q adjacent to each other along the drive electrode line 31DR varies irregularly with the order in which the bent portions 31Q are arranged in the drive electrode line 31DR.

  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 group is 5% or less. It is preferable that the number of bent portions of each drive electrode line 31DR is equal. For all the drive electrode lines 31DR included in the plurality of drive electrodes 31DP, an arithmetic average value of the number of bent portions for each drive electrode line 31DR is defined as an average value Aave. 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 defined as a 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 defined as a minimum value Admin. At this time, the variation in the number of bent portions is given by (Admax + Admin) / (2 × Adv) × 100.

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

As shown in FIG. 11, a plurality of virtual regions R2 each having the same size and arranged along the second electrode direction D2 are overlapped with each drive electrode line 31DR along each drive electrode line 31DR. Deploy. That is, the virtual region R2 is located one by one at predetermined intervals along the second electrode direction D2. The virtual region R2 located at the end may be disposed at the end of the drive electrode line 31DR, or may be disposed at a position away from the end of the drive electrode line 31DR. When such a virtual region R2 is set, one bent portion 31Q is located in each of the plurality of virtual regions R2.
Note that the line width of the drive electrode line 31DR is preferably 6 μm or less, similarly to the line width of the sensing electrode line 33SR.

[Detailed structure of conductive film]
With reference to FIG. 12, the detailed structure of the conductive film 21 will be described with a focus on the electrode line pattern which is a pattern formed by superimposing the sensing electrode line 33SR and the drive electrode line 31DR, and the operation thereof will be described. Will be described.

  As shown in FIG. 12, in the conductive film 21, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the pattern composed of the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR are used. A pattern in which the pattern to be configured is superimposed is formed. At this time, these electrode lines are overlapped so that the extending direction of the sensing electrode line 33SR and the extending direction of the drive electrode line 31DR are orthogonal to each other. That is, the direction in which the sensing electrode line 33SR extends and the direction in which the drive electrode lines 31DR are arranged are the first electrode direction D1 and the same direction. The direction in which the drive electrode line 31DR extends and the direction in which the sensing electrode line 33SR are arranged are the second electrode direction D2 and the same direction.

  Further, the extending direction of the sensing electrode line 33SR and the extending direction of the drive electrode line 31DR are parallel to the extending direction of the pixel array. That is, the first electrode direction D1 and the first pixel direction G1 are the same direction, and the second electrode direction D2 and the second pixel direction G2 are the same direction.

  As described above, in the sensing electrode line 33SR, the distance d1 along the first electrode direction D1 between the adjacent bent portions 33Q and the distance d2 along the second electrode direction D2 are in the order in which the bent portions 33Q are arranged. On the other hand, it is changing irregularly. Further, the drive electrode line 31DR has the same 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 / absence of structures in the first electrode direction D1 and the second electrode direction D2 The periodicity is so low that it cannot be recognized by visual inspection. Therefore, when such an electrode line pattern is used, the influence of the periodicity of the pixel pattern can be kept low with respect to the suppression of moire. Therefore, even when the touch panel 20 having such an electrode line pattern is overlapped with a plurality of display panels 10 having different sizes and resolutions, it is possible to suppress the moiré from being visually recognized on each display panel 10.
The extending direction of sensing electrode line 53SR and the extending direction of drive electrode line 51DR may be inclined with respect to the extending direction of the pixel array.

  That is, as shown in FIG. 13, the electrode line pattern and the pixel pattern are arranged so that the angle between the first electrode direction D1 and the first pixel direction G1 is an angle α different from 0 ° and 90 °. It may be. At this time, the angle formed by the second electrode direction D2 and the first pixel direction G1 is − (90−α) °.

  In the configurations illustrated in FIGS. 12 and 13, the extending direction of the sensing electrode line 33SR and the extending direction of the drive electrode line 31DR are orthogonal to each other. Instead, the first electrode direction D1 that is the direction in which the sensing electrode line 33SR extends and the second electrode direction D2 that is the direction in which the drive electrode line 31DR extends are not orthogonal to each other, and the first electrode direction D1 and the drive electrode The second parallel direction H2 in which the lines 31DR are arranged is different from each other, and the second electrode direction D2 and the first parallel direction H1 in which the sensing electrode lines 33SR are arranged are different from each other. There may be.

  In the example shown in FIG. 14, the first electrode direction D1 and the second electrode direction D2 form an angle different from 0 ° and 90 °. The plurality of sensing electrode lines 53SR are arranged along the first parallel direction H1 orthogonal to the first electrode direction D1, and the plurality of drive electrode lines 51DR are aligned in the second parallel direction H2 orthogonal to the second electrode direction D2. It is lined up along.

  Further, the electrode line pattern and the pixels are arranged such that the angle formed between the first electrode direction D1 and the first pixel direction G1 is an angle β, and the angle formed between the second electrode direction D2 and the first pixel direction G1 is an angle γ. Patterns are arranged. The angles β and γ are different from 0 ° and 90 °.

  As shown in FIG. 15, when the angle formed by the first electrode direction D1 in which the sensing electrode line 33SR extends and the first pixel direction G1 in which the pixels 15P are arranged is the angle Φ, the angle Φ is 15 ° ≦ Φ ≦ 40 °, 50 ° ≦ Φ ≦ 75 °, −40 ° ≦ Φ ≦ −15 °, and −75 ° ≦ Φ ≦ −50 ° are preferably satisfied. At this time, the angle formed by the second electrode direction D2 and the first pixel direction G1, which is the direction in which the drive electrode line 31DR extends, is preferably −Φ.

  The range of the angle Φ described above includes an electrode line pattern in which rectangles or rhombuses are arranged as shown in FIGS. 5 to 7, and a plurality of types of pixel patterns having different first pixel widths P1 and second pixel widths P2. It is obtained from the simulation using and. In such a simulation, the angle formed by the first electrode direction D1 and the first pixel direction G1 is changed to a plurality of types, and the degree of moire when the electrode line pattern and the pixel pattern are overlapped at each angle is calculated numerically. Is done. As a result of the simulation, when the angle formed by the first electrode direction D1 and the first pixel direction G1 is within the range indicated as the range of the angle Φ, the visibility of moire is suppressed. Further, at this time, in the electrode line pattern in which rhombuses are arranged in which the angle between the second electrode direction D2 and the first pixel direction G1 is −Φ, the visibility of moire is particularly suppressed.

  The above-described simulation is performed using, for example, Fourier analysis. In Fourier analysis, frequency information is obtained by performing Fourier transform on the two-dimensional data of the pattern to be superimposed, and the obtained two-dimensional Fourier pattern convolution is calculated, and then a two-dimensional mask is applied. The image is reconstructed by inverse Fourier transform. Since the pitch of the moire is larger than the period of the original pattern to be superimposed, it is only necessary that the two-dimensional mask removes high-frequency components by the two-dimensional mask and extracts only low-frequency components. Whether the moiré is visible based on calculating the contrast, pitch, and angle of the moiré after image reconstruction by setting the mask size to a size that depends on the human visual response characteristics Can be judged.

[Method of creating electrode line pattern]
With reference to FIGS. 16 to 18, a method of creating an electrode line pattern composed of the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR will be described. Hereinafter, a method for creating a pattern including the sensing electrode line 33SR will be described.
The pattern of the sensing electrode line 33SR of the present embodiment is created based on a pattern composed of a plurality of reference electrode lines having a linear shape.

  As shown in FIG. 16, the reference electrode line 40KR has a linear shape extending along the first electrode direction D1, and the plurality of reference electrode lines 40KR are spaced apart from each other by a reference interval Pk that is a predetermined interval. They are arranged along the electrode direction D2. In creating the pattern of the sensing electrode line 33SR, first, a plurality of displacement points 40J are set with respect to the reference electrode line 40KR. The displacement points 40J are arranged one by one on the reference electrode line 40KR with a displacement point distance Px that is a predetermined distance. The displacement point 40J located at the end may be disposed at the end of the reference electrode line 40KR, or may be disposed at a position away from the end of the reference electrode line 40KR.

  As shown in FIG. 17, the positions of the displacement points 40J in the plurality of reference electrode lines 40KR are irregularly displaced, thereby forming a pattern composed of the plurality of sensing electrode lines 33SR. The position of the displacement point 40J is moved within a square displacement region S centered on the displacement point 40J. In FIG. 17, the sensing electrode line 33SR is indicated by a thick line, and the reference electrode line 40KR is indicated by a thin line.

  One sensing electrode line 33SR has a shape in which the position of each displacement point 40J on one reference electrode line 40KR is irregularly displaced in the displacement region S for each displacement point 40J with respect to the order of arrangement of the displacement points 40J. Have. The displacement point 40J after displacement in the displacement region S is the bent portion 33Q of the sensing electrode wire 33SR. A pattern composed of a plurality of sensing electrode lines 33SR by irregularly displacing the positions of the respective displacement points 40J in the plurality of reference electrode lines 40KR with respect to the arrangement order of the displacement points 40J in each reference electrode line 40KR. Is formed.

  A parameter for determining the periodicity of an electrode line pattern composed of a plurality of reference electrode lines 40KR, that is, a reference interval Pk is generated when the electrode line pattern and the pixel pattern of the display panel 10 are overlapped. Is preferably set to a value that can be suppressed.

  Further, the reference interval Pk is preferably set in a range of 10% to 300% of the first pixel width P1 and the second pixel width P2 in the display panel 10. When the first pixel width P1 and the second pixel width P2 are different, the larger pixel width 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 proportion of the electrode lines in the operation surface is not excessive when viewed from the direction facing the operation surface. And the fall of the light transmittance in touch panel 20 is controlled. 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 displacement point distance Px is preferably 0.90 times to 1.10 times the reference interval Pk. If the displacement point distance Px is 0.90 times or more of the reference interval Pk, the number of the bent portions 33Q in the sensing electrode wire 33SR does not increase too much, so that the sensing electrode wire 33SR becomes long and the electrode is within the operation surface. It is possible to suppress an excess of the line. As a result, a decrease in light transmittance and an increase in resistance value in the touch panel 20 are suppressed. On the other hand, if the displacement point distance Px is 1.10 times or less of the reference interval Pk, the number of the displacement points 40J is sufficiently secured, and the periodicity of the electrode line pattern is sufficiently lowered by the displacement of the displacement points 40J. .

  The displacement region S has a square shape having sides extending along the first electrode direction D1 and sides extending along the second electrode direction D2. The length r, which is the length of one side of the displacement region S, is preferably 0.30 to 0.80 times the displacement point distance Px, and preferably 0.55 to 0.80 times. Further preferred.

Similarly to the pattern composed of the plurality of sensing electrode lines 33SR, the pattern composed of the plurality of drive electrode lines 31DR also irregularly displaces the displacement points set on the plurality of reference electrode lines having a linear shape. Created by.
Next, the reason for defining the preferable range of the length r in the displacement region S will be described with reference to FIG. 18 using the moire simulation results for each test example.

  FIG. 18 is a diagram illustrating a result of analyzing the relationship between the size of the displacement region S and the contrast of the moire generated by overlaying the electrode line pattern and the pixel pattern using Fourier analysis.

  Specifically, first, the length r is changed into a plurality of types, and one electrode line pattern in which the displacement point 40J is displaced in the displacement region S is obtained for each length r. Next, a plurality of pixel patterns having different first pixel widths P1 and second pixel widths P2 and the electrode line patterns are used, and an image obtained by superimposing these electrode line patterns and pixel patterns is subjected to a two-dimensional Fourier. Perform conversion. That is, a two-dimensional Fourier transform of an image for each pixel pattern obtained by superimposing the electrode line pattern and each pixel pattern is obtained for each electrode line pattern. In the power spectrum obtained by the two-dimensional Fourier transform, the peak appearing in the low frequency region is the primary term of the peak derived from the periodicity of the stripes visually recognized as moire, and the greater the intensity of this peak, the more moire the generated Indicates that the contrast is high.

The configuration of the electrode line pattern and pixel pattern of each test example used to obtain the analysis result of FIG. 18 is shown below.
<Electrode line pattern of test example>
As the pattern of the reference electrode lines, the rectangular array pattern shown in FIG. 6 and the rhombus array pattern shown in FIG. 7 were used. In each pattern, the reference interval Pk is 372 μm in both the reference electrode line pattern that is the basis of the sensing electrode line 33SR and the reference electrode line pattern that is the basis of the drive electrode line 31DR. A displacement point distance Px was set to 372 μm for each of these reference electrode line patterns, and a displacement point 40J was set within the displacement region S. The ratio of the length r in the displacement region S to the displacement point distance Px in each of the rectangular pattern and the rhombus pattern is 10% from 0% to 100%, where r = Px is 100%. Eleven types of electrode line patterns, which were changed every%, were created.

  In the state where the electrode line pattern and the pixel pattern created based on the rectangular array pattern are overlapped, the angle formed by the first electrode direction D1 and the first pixel direction G1 is 40 °, and the second electrode direction The angle formed by D2 and the first pixel direction G1 is −50 °.

In the state in which the electrode line pattern created based on the rhombus arrangement pattern and the pixel pattern are overlapped, the angle formed by the first electrode direction D1 and the first pixel direction G1 is 40 °, and the second electrode direction The angle formed by D2 and the first pixel direction G1 is −40 °.
<Pixel pattern of test example>
Three types of pixel patterns having pixel sizes corresponding to HD, HD +, and FHD resolutions were used.

  In FIG. 18, the horizontal axis indicates the ratio of the length r to the displacement point distance Px, where r = Px is 100%, and the vertical axis is when the length r is 0% of the displacement point distance Px. That is, the peak intensity normalized as 1 when the pattern made of the reference electrode line in which the displacement point 40J is not displaced is used is shown.

  Further, the curve shown in FIG. 18 shows the analysis result of the overlay with the electrode line pattern created based on the rectangular lined pattern for each type of pixel pattern, and the electrode line pattern created based on the rhombus lined pattern. It is an approximate curve with the analysis result of superposition of.

  As shown in FIG. 18, in any result using any pixel pattern, the same tendency is observed in the relationship between the length r of the displacement region S and the peak intensity, and the length r is large. Indeed, the peak intensity decreases.

  Specifically, as a result of using a pixel pattern corresponding to HD, when the ratio of the length r to the displacement point distance Px is less than 30%, the peak intensity gradually decreases, and the effect of reducing the moire contrast is achieved. Is small. On the other hand, in any result of using any pixel pattern, the peak intensity is remarkably reduced in the range where the ratio of the length r to the displacement point distance Px is 30% to 80%, and the displacement point distance Px of length r. In the range where the ratio to is over 80%, the decrease in peak intensity is small.

  When the displacement region S is excessively large, a pattern called graininess due to the bias of the electrode wire is easily recognized. Therefore, in order to reduce the moire contrast while suppressing the occurrence of such grain, the ratio of the length r to the displacement point distance Px is within the range indicated by the circles in the figure, that is, 30% or more and 80% or less. It is preferable that

  Moreover, when all the results are averaged, when the ratio of the length r to the displacement point distance Px is 100%, the peak intensity is reduced by about 60% compared to when the ratio is 0%. And when the said ratio is 55%, compared with when the said ratio is 0%, peak intensity falls about 30%. Therefore, if the ratio is 55%, the peak intensity decreases to about half of the decrease in peak intensity when the ratio is 100%.

  Therefore, in order to appropriately secure the degree of reduction in peak intensity and reduce the moire contrast, the ratio of the length r to the displacement point distance Px is in the range indicated by ◎ in the figure, that is, 55% or more 80%. More preferably, it is% or less.

  From the above results, the length r in the displacement region S is preferably 0.30 to 0.80 times the displacement point distance Px, and more preferably 0.55 to 0.80 times. It turns out that it is preferable. If the length r is within the above range, the moire contrast can be kept low, so that the moire can be prevented from being visually recognized.

  Note that even when an electrode line pattern different from the above is used for the reference interval Pk or when the extending direction of the electrode lines is inclined at an angle different from the above with respect to the extending direction of the pixel array, the displacement Regarding the relationship between the size of the region S and the contrast of moire, the inventors have confirmed that a result having the same tendency as the result shown in FIG. 18 is obtained.

  The parameters such as the reference interval Pk in the reference electrode line 40KR and the angle formed by the first electrode direction D1 and the second electrode direction D2 are preferably set as follows. That is, by using Fourier analysis or the like, each parameter can be set for each display panel 10 when the pattern of the reference electrode line 40KR is superimposed on a plurality of display panels 10 having different sizes and resolutions. It is preferable to set the pattern so that moire is suppressed. According to such a configuration, it is further suppressed that the moire is visually recognized in the electrode line pattern created by displacing the displacement point 40J based on the pattern of the reference electrode line 40KR.

  The electrode line pattern according to the present embodiment is not limited to the plurality of display panels 10 used for setting each parameter in the reference electrode line 40KR. As a result, the periodicity is lowered by the irregular displacement of the displacement point 40J. The generation of moire can be suppressed for the display panels 10 having 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, deterioration in display quality is suppressed.

  In the above embodiment, the transparent dielectric substrate 33 is an example of a transparent dielectric layer. When the 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 wire 33SR is the first electrode wire, and the sensing electrode group is the first electrode. The drive electrode line 31DR is a second electrode line. In the configuration in which the first electrode direction D1 and the second electrode direction D2 are orthogonal to each other, the first electrode direction D1 is the first direction and the second intersection direction, and the second electrode direction D2 is the second direction and the first intersection. Direction. Furthermore, in the configuration in which the first electrode direction D1 and the second electrode direction D2 are not orthogonal, the first electrode direction D1 is the first direction, the first parallel direction H1 is the first intersecting direction, and the second electrode direction D2 Is the second direction, and the second parallel direction H2 is the second intersecting direction.

  When the 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 line 33SR is the second electrode line, and the drive electrode line 31DR is the first surface. It is an electrode line, and the drive electrode line group is the first electrode line group. In the configuration in which the first electrode direction D1 and the second electrode direction D2 are orthogonal to each other, the second electrode direction D2 is the first direction and the second intersection direction, and the first electrode direction D1 is the second direction and the first intersection. Direction. Further, in the configuration in which the first electrode direction D1 and the second electrode direction D2 are not orthogonal, the second electrode direction D2 is the first direction, the second parallel direction H2 is the first intersecting direction, and the first electrode direction D1. Is the second direction, and the first parallel direction H1 is the second crossing direction.

As described above, according to the present embodiment, the effects listed below can be obtained.
(1) In the sensing electrode line 33SR and the drive electrode line 31DR, the distance along the direction in which the electrode lines extend between the adjacent bent portions and the distance along the direction in which the electrode lines are arranged are in the order in which the bent portions are arranged. On the other hand, it is changing irregularly. According to such a configuration, 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 is irregularly bent. The periodicity of the electrode line pattern is lower than that of an electrode line pattern composed of bent line-shaped electrode lines. For this reason, the influence of the periodicity of the pixel pattern can be kept low with respect to the suppression of moire. Therefore, even when the touch panel 20 having such an electrode line pattern is overlapped with a plurality of display panels 10 having different sizes and resolutions, it is possible to prevent the moire from being visually recognized. Visibility of moire can be suppressed for various display panels 10.

  (2) The bent line shape of the sensing electrode line 33SR and the drive electrode line 31DR is a bent line shape in which a plurality of short line portions 33E and 31E are connected via the bent portions 33Q and 31Q. The plurality of short line portions 33E and 31E include Short line portions 33E and 31E having a linear shape inclined with respect to the extending direction of the electrode lines are included. By configuring the sensing electrode line 33SR and the drive electrode line 31DR in this manner, a bent line shape that is irregularly bent is accurately realized.

  (3) The variation in the number of bent portions 33Q in the sensing electrode line group is 5% or less, and the variation in the number of bent portions 31Q in the drive electrode line group is 5% or less. According to such a configuration, it is possible to prevent the sensing electrode lines 33SR adjacent to each other and the drive electrode lines 31DR adjacent to each other from crossing or contacting each other. For this reason, it is possible to suppress the electrode lines from being easily visually recognized due to the electrode lines becoming thick at the corners formed at the intersections or contact portions of the electrode lines. In addition, the design load required to prevent the adjacent electrode lines from crossing or contacting each other, such as fine setting of the size of the displacement region S, can be reduced.

  (4) In the sensing electrode line 33SR and the drive electrode line 31DR, each of the virtual regions R1 and R2 having the same size and positioned at predetermined intervals along the extending direction of the electrode lines, One bent portion 33Q, 31Q is located in each virtual region R1, R2. Since the other bent portions 33Q and 31Q are not located in the line segment connecting the adjacent bent portions 33Q and 31Q, the longer the length of these line segments, the lower the irregularity of the bent line shape. . In this regard, according to the above configuration, since the position of the bent portion is suppressed from being extremely biased within one electrode line, the length of the line segment connecting the adjacent bent portions 33Q and 31Q is extremely long. In comparison, an irregular bent line shape can be accurately realized.

  (5) The bent line shapes of the sensing electrode line 33SR and the drive electrode line 31DR are as follows. That is, virtual reference electrode lines that have a linear shape and are arranged with a reference interval Pk are set, and the positions of a plurality of displacement points 40J located on each reference electrode line are the positions of the bent portions 33Q and 31Q. Thus, the shape in which the displacement points 40J are irregularly displaced with respect to the arrangement order of the displacement points 40J is a bent line shape. A displacement point distance Px, which is a distance between adjacent displacement points 40J before displacement, is 0.90 times or more and 1.10 times or less of the reference interval Pk.

  If the displacement point distance Px is 0.90 times or more of the reference interval Pk, the number of the bent portions 33Q and 31Q does not increase too much, so that the proportion of the electrode lines occupied in the operation surface is suppressed. It is done. As a result, a decrease in light transmittance and an increase in resistance value in the touch panel 20 are suppressed. On the other hand, if the displacement point distance Px is 1.10 times or less of the reference interval Pk, the number of the displacement points 40J is sufficiently secured, and the periodicity of the electrode line pattern is sufficiently lowered by the displacement of the displacement points 40J. .

  (6) The displacement point 40J is displaced in the displacement region S having a square shape, and the length r of one side of the displacement region S is not less than 0.30 times and not more than 0.80 times the displacement point distance Px. If the length r is equal to or greater than the lower limit value, the intensity of the peak appearing in the low frequency region is kept low by Fourier analysis of an image obtained by superimposing the electrode line pattern and the pixel pattern created based on the reference electrode line 40KR. It is done. Therefore, since the contrast of the moire generated when the electrode line pattern and the display panel 10 are superimposed is suppressed to be low, it is difficult to visually recognize the moire. In addition, if the length r is equal to or less than the above upper limit value, it is difficult to visually recognize the grain pattern due to the bias of the electrode wires.

  (7) If the length r of one side of the displacement region S is 0.55 times or more and 0.80 times or less of the displacement point distance Px, the intensity of the peak can be further reduced, so that moire is further visually recognized. It becomes difficult.

  (8) The angle Φ between the first electrode direction D1 in which the sensing electrode line 33SR extends and the first pixel direction G1 in which the pixels 15P are arranged is 15 ° ≦ Φ ≦ 40 °, 50 ° ≦ One of Φ ≦ 75 °, −40 ° ≦ Φ ≦ −15 °, and −75 ° ≦ Φ ≦ −50 ° is satisfied. When the angle Φ is in the above range, the visibility of moire can be suppressed in the electrode line pattern in which the rectangles or rhombuses are arranged as the basis of the pattern of the sensing electrode line 33SR. Therefore, even in an electrode line pattern created from such an electrode line pattern in which rectangles or rhombuses are arranged, it is possible to accurately suppress the moire from being visually recognized. Moreover, since the occurrence of moire is easy to be suppressed, it is easy to avoid the grain pattern being visually recognized due to the unevenness of the electrode wires due to excessive irregularity.

  (9) The second electrode direction D2, which is the direction in which the drive electrode line 31DR extends, has −Φ as an angle formed with the first pixel direction G1. According to such a configuration, it is possible to appropriately suppress the moire from being visually recognized, and to reduce the load for setting the angular relationship between the first electrode direction D1, the second electrode direction D2, and the first pixel direction G1. .

[Modification]
The above embodiment can be implemented with the following modifications.
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 33E and 31E having a linear shape, and the bent portion may be formed in a curved shape having a curvature.

  -Only one of the pattern composed of the plurality of sensing electrode lines 33SR and the pattern composed of the plurality of drive electrode lines 31DR is a pattern composed of electrode lines having an irregularly bent line shape. May be. In addition, 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 is irregularly bent. Even if all of the electrode lines do not have a bent line shape that bends irregularly, the electrode line pattern that includes the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR includes a bent line that bends irregularly. In this case, the periodicity of the electrode line pattern is reduced as compared with the conventional electrode line pattern.

  However, in the configuration in which both the plurality of sensing electrode lines 33SR and the plurality of drive electrode lines 31DR include bent line-shaped electrode lines that are irregularly bent, only the plurality of sensing electrode lines 33SR or the plurality of drives Compared to a configuration in which only the electrode line 31DR includes a bent line-shaped electrode line that is irregularly bent, the periodicity of the electrode line pattern is lowered. Accordingly, it is possible to suppress the moiré from being visually recognized on more various display panels 10.

  In the above embodiment, the shapes of the sensing electrode line 33SR and the drive electrode line 31DR are determined based on the pattern of the reference electrode lines 40KR arranged with the reference interval Pk. Not limited to this, in the sensing electrode line 33SR and the drive electrode line 31DR, the distance along the extending direction of the electrode lines between the adjacent bent portions and the distance along the direction in which the electrode lines are arranged are If the configuration changes irregularly with respect to the arrangement order, that is, if the sensing electrode line 33SR and the drive electrode line 31DR have a bent line shape that bends irregularly, the periodicity of the electrode line pattern decreases. Therefore, the effect according to the above (1) can be obtained.

  The first electrode direction D1 that is the direction in which the sensing electrode line 33SR extends and the first parallel direction H1 that is the direction in which the sensing electrode line 33SR is arranged may not be orthogonal to each other, and these directions intersect each other. Just do it. Similarly, the second electrode direction D2, which is the direction in which the drive electrode line 31DR extends, and the second parallel direction H2, which is the direction in which the drive electrode line 31DR is arranged, do not have to be orthogonal to each other, and these directions intersect each other. If you do. That is, the first direction, which is the direction in which one electrode line extends, and the first intersecting direction, in which the one electrode line is arranged, need only intersect with each other, and the first direction in which the other electrode line extends. The two directions and the second intersecting direction, which is the direction in which the other electrode lines are arranged, only need to intersect each other.

  As shown in FIG. 19, the transparent substrate 31 and the transparent adhesive layer 32 may be omitted from the conductive film 21 constituting the touch panel 20. In such a configuration, the back surface facing the display panel 10 is set as the drive electrode surface 31S in the surface of the transparent dielectric substrate 33, and the drive electrode 31DP is located on the drive electrode surface 31S. And the surface which is a surface on the opposite side to the back surface in the transparent dielectric substrate 33 is the sensing electrode surface 33S, and sensing electrode 33SP is located in the sensing electrode surface 33S. In such a configuration, the drive electrode 31DP is formed, for example, by patterning one thin film formed on one surface of the transparent dielectric substrate 33 by etching, and the sensing electrode 33SP is, for example, a transparent dielectric One thin film formed on the other surface of the body substrate 33 is formed by patterning by etching.

  In the configuration in which the sensing electrode line 33SR and the drive electrode line 31DR are formed on different base materials as in the above embodiment, compared to the configuration in which the electrode lines are formed on both surfaces of one base material. The electrode wire can be easily formed.

  As shown in FIG. 20, in the touch panel 20, the drive electrode 31 DP, the transparent substrate 31, the transparent adhesive layer 32, the transparent dielectric substrate 33, the sensing electrode 33 SP, and the transparent adhesive layer 23 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, the surface of the transparent substrate 31 opposite to the drive electrode surface 31S and the 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 may 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 in-cell type, in the conductive film 21, the plurality of drive electrodes 31 DP are positioned on the TFT layer 13, while the plurality of sensing electrodes 33 SP are positioned between the color filter substrate 16 and the upper polarizing plate 17. It can be set as this structure. Alternatively, an on-cell 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, the layer sandwiched between the drive electrode 31DP and the sensing electrode 33SP constitutes a transparent dielectric layer.

[Example]
The conductive film, touch panel, and display device described above will be described using specific examples and comparative examples.
<Display panel>
As the display panels constituting the display device, the following two types of display panels having different pixel sizes were used.
(Display panel A)
The display surface of the display panel A is a 15.6 inch size having a horizontal width of 344.2 mm and a vertical width of 193.5 mm.
The number of pixels of the display panel A is 1366 in the horizontal direction and 768 in the vertical direction, and the resolution of the display panel A is a resolution generally referred to as HD. The pixels of the display panel A have a square shape, and the first pixel width P1 and the second pixel width P2 are both 252 μm. Each colored layer of the red colored layer, the green colored layer, and the blue colored layer has a substantially rectangular shape, and the size of each colored layer is 75 μm in width and 231 μm in length.

(Display panel B)
The display surface of the display panel B has the same size as the display surface of the display panel A.
The number of pixels of the display panel B is 1600 in the horizontal direction and 900 in the vertical direction, and the resolution of the display panel B is a resolution generally referred to as HD +. The pixels of the display panel B have a square shape, and the first pixel width P1 and the second pixel width P2 are both 215 μm. Each colored layer of the red colored layer, the green colored layer, and the blue colored layer has a substantially rectangular shape, and the size of each colored layer is 63 μm in width and 195 μm in length.

<Touch panel>
As the following examples and comparative examples, five types of touch panels having different electrode line patterns were produced. In each touch panel, the line width of the electrode line was 6 μm, and the electrode line was formed by etching.

Example 1
The electrode line pattern was formed such that the first electrode direction in which the sensing electrode line extends and the second electrode direction in which the drive electrode line extends formed an angle other than 0 ° and 90 °. The plurality of sensing electrode lines are arranged along a first parallel direction orthogonal to the first electrode direction, and the plurality of drive electrode lines are arranged along a second parallel direction orthogonal to the second electrode direction. Each of the pattern composed of a plurality of sensing electrode lines and the pattern composed of a plurality of drive electrode lines has a displacement point located on the reference electrode line with a length r within the range described in the above embodiment. It was created by displacing within a displacement region having

  The touch panel of Example 1 having the electrode line pattern is overlaid on the display panel so that the first electrode direction and the first pixel direction form an angle other than 0 ° and 90 °, thereby forming a display device. . That is, the touch panel of Example 1 has an electrode line pattern as illustrated in FIG.

(Example 2)
The electrode line pattern was formed so that the first electrode direction in which the sensing electrode line extends and the second electrode direction in which the drive electrode line extends were orthogonal to each other. The plurality of sensing electrode lines are arranged along the second electrode direction, and the plurality of drive electrode lines are arranged along the first electrode direction. Each of the pattern composed of a plurality of sensing electrode lines and the pattern composed of a plurality of drive electrode lines has a displacement point set to the reference electrode line within the range described in the above embodiment. It was created by displacing within a displacement region having r.

  The touch panel of Example 2 having the electrode line pattern is overlaid on the display panel so that the first electrode direction and the first pixel direction form an angle other than 0 ° and 90 ° to form a display device. . That is, the touch panel of Example 2 has an electrode line pattern as illustrated in FIG.

Example 3
The electrode line pattern was formed so that the first electrode direction in which the sensing electrode line extends and the second electrode direction in which the drive electrode line extends were orthogonal to each other. The plurality of sensing electrode lines are arranged along the second electrode direction, and the plurality of drive electrode lines are arranged along the first electrode direction. Each of the pattern composed of a plurality of sensing electrode lines and the pattern composed of a plurality of drive electrode lines has a displacement point set to the reference electrode line below the lower limit value of the range described in the above embodiment. It was created by displacing within a displacement region having a length r of.

  The touch panel of Example 3 having the electrode line pattern is overlaid on the display panel so that the first electrode direction and the first pixel direction form an angle other than 0 ° and 90 °, thereby forming a display device. .

(Comparative Example 1)
An electrode line pattern composed of sensing electrode lines having a linear shape and drive electrode lines having a linear shape was formed.
The first electrode direction in which the sensing electrode line extends and the second electrode direction in which the drive electrode line extends are orthogonal to each other, the plurality of sensing electrode lines are arranged along the second electrode direction, and the plurality of drive electrode lines are the first electrode Line up along the direction. The interval between the sensing electrode lines aligned in the second electrode direction and the interval between the drive electrode lines aligned in the first electrode direction can be determined using a program so that moire is less visible when superimposed on the display panel A. Set.

  The touch panel of Comparative Example 1 having the electrode line pattern is overlaid on the display panel so that the first electrode direction and the first pixel direction are orthogonal to each other to form a display device. That is, the touch panel of Comparative Example 1 has an electrode line pattern as illustrated in FIG.

(Comparative Example 2)
An electrode line pattern composed of sensing electrode lines having a linear shape and drive electrode lines having a linear shape was formed.
The first electrode direction in which the sensing electrode line extends and the second electrode direction in which the drive electrode line extends form an angle other than 0 ° and 90 °, and the plurality of sensing electrode lines are in a first parallel direction orthogonal to the first electrode direction. The plurality of drive electrode lines are arranged along a direction, and are arranged along a second parallel direction orthogonal to the second electrode direction. The angle between the first electrode direction and the second electrode direction, the distance between the sensing electrode lines arranged in the first parallel direction, and the distance between the drive electrode lines arranged in the second parallel direction are overlapped with the display panel A. In order to make it difficult for the moire to be visually recognized, a program was used.

  The touch panel of Comparative Example 2 having the electrode line pattern is overlaid on the display panel so that the first electrode direction and the first pixel direction form an angle other than 0 ° and 90 °, thereby forming a display device. . That is, the touch panel of Comparative Example 2 has an electrode line pattern as illustrated in FIG.

<Evaluation method>
Each of the touch panels of the above embodiment and the comparative example is overlapped with each of the above two types of display panels to form a display device, and faces the display surface in a state in which green is displayed with the best human visual response. The display device was viewed from the direction, and the degree to which moire was visually recognized was evaluated. The distance from the observation position to the display surface was 300 mm. The evaluation results are shown in Table 1.
In Table 1, the case where a clear stripe is visible as a moire is “x”, the case where a weak stripe is visible is Δ, and the case where no stripe is visible is “◯”.

<Result>
In the display device using the touch panel of Comparative Example 1, a weak moire was confirmed for the display panel A, and a strong moire was confirmed for the display panel B. In the touch panel of Comparative Example 1, since the electrode line pattern has high periodicity, the distance between the electrode lines is adjusted according to the display panel A, but the moire is not completely suppressed. And a strong moire is visually recognized with respect to the display panel B which has a pixel pattern different from the display panel A used for adjustment of the space | interval between electrode lines. This is because the distance between the electrode lines that is set so that the moire can be suppressed with respect to the display panel A is different from the distance between the electrode lines that can suppress the moire with respect to the display panel B.

  In the display device using the touch panel of Comparative Example 2, no moire was confirmed on the display panel A, and strong moire was confirmed on the display panel B. In the touch panel of Comparative Example 2, the angle formed by the extending direction of the electrode lines in addition to the interval between the electrode lines is adjusted according to the display panel A. On the other hand, moire is suppressed. However, a strong moire is visually recognized on the display panel B. This is because the distance between the electrode lines set to suppress the moire with respect to the display panel A and the angle formed by the extending direction of the electrode lines are the distance and the angle with which the moire can be suppressed with respect to the display panel B. Because they are different.

  On the other hand, in the display device using the touch panel of Example 1 and Example 2, moire was not visually recognized for any of display panel A and display panel B.

  Further, in the display device using the touch panel of Example 3 in which the displacement region is smaller than that of Examples 1 and 2, although the degree of moire is stronger than that of Examples 1 and 2, compared with Comparative Examples 1 and 2, For both the display panel A and the display panel B, the moire was suppressed from being visually recognized. Since the displacement area of the touch panel of Example 3 is smaller than that of Examples 1 and 2, the decrease in periodicity in the electrode line pattern is smaller than that of Examples 1 and 2. Therefore, in Example 3, compared with Examples 1 and 2, moire is easily visually recognized. From these results, it is possible to prevent the moire from being visually recognized more accurately by setting the length r of the displacement region within the range described in the embodiment as in Examples 1 and 2. confirmed.

  As described above, in the touch panels of Examples 1 to 3 having the electrode line pattern including the bent line that bends irregularly, even when superimposed on a plurality of types of display panels, moiré is caused for each display panel. Compared with the touch panels of Comparative Examples 1 and 2 having an electrode line pattern composed of regular electrode lines, it is possible to suppress the visual recognition of the moiré on various display panels. It was shown that it can be suppressed.

  D1 ... first electrode direction, D2 ... second electrode direction, H1 ... first parallel direction, H2 ... second parallel direction, G1 ... first pixel direction, G2 ... second pixel direction, ND ... capacitance detector, R1, R2 ... Virtual region, S ... Displacement region, Pk ... Reference interval, Px ... Displacement point distance, 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 Tansen unit, 33Q ... bent portion 34 ... selection circuit, 35 ... detecting circuit, 36 ... control unit, 40KR ... reference electrode line, 40 J ... displacement point, 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;
A plurality of electrode lines extending along a second direction intersecting the first direction on the second surface of the transparent dielectric layer 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 wire has a bent line shape including a plurality of bent portions,
The distance in the first direction between the bent portions adjacent to each other along the first electrode line and the distance in the first intersecting direction are irregular with respect to the order in which the bent portions are arranged in the first electrode line. The first electrode wire is configured to change to a conductive film. The bent line shape is a broken line shape in which a plurality of short line portions having a linear shape are connected via the bent portion, and the plurality of short line portions have a linear shape inclined with respect to the first direction. The conductive film according to claim 1. The plurality of electrode lines located on the first surface includes a first electrode line group composed of the plurality of first electrode lines arranged along the first intersecting direction,
3. The conductive film according to claim 1, wherein in the first electrode line group, variation in the number of the bent portions between the first electrode lines is 5% or less. The plurality of virtual regions, each having the same size and positioned at predetermined intervals along the first direction, each includes one bent portion in each virtual region. The conductive film according to any one of 3. A virtual electrode line that extends in a straight line along the first direction and is arranged at a reference interval that is a predetermined interval in the first intersecting direction is a reference electrode line,
The bent line shape of the first electrode line is an arrangement of the displacement points on the reference electrode line such that the positions of the plurality of displacement points located on the reference electrode line are the positions of the bent portions. The shape is irregularly displaced with respect to the order of
The conductive point according to any one of claims 1 to 4, wherein a displacement point distance, which is a distance between the displacement points before displacement adjacent to each other, is 0.90 times to 1.10 times the reference interval. Sex film. A virtual area of a square shape having a side extending along the first direction and a side extending along the first intersecting direction around the displacement point before the displacement is a displacement area,
The displacement point after the displacement is located in the displacement region,
The conductive film according to claim 5, wherein a length of one side of the displacement region is not less than 0.30 times and not more than 0.80 times the displacement point distance. The conductive film according to claim 6, wherein a length of one side of the displacement region is not less than 0.55 times and not more than 0.80 times the displacement point distance. 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 bent line shape including a plurality of bent portions,
The distance in the second direction between the bent portions adjacent to each other along the second electrode line and the distance in the second intersecting direction are irregular with respect to the order in which the bent portions are arranged in the second electrode line. The conductive film according to claim 1, wherein the second electrode line is configured to change to The plurality of electrode lines positioned on the first surface and the plurality of electrode lines positioned on the second surface are formed on different base materials from each other. Sex film. The conductive film according to any one of claims 1 to 9,
A cover layer covering the conductive film;
A peripheral circuit that measures a capacitance between an electrode line disposed on the first surface and an electrode line disposed on the second surface. A display panel having a plurality of pixels arranged in a grid and displaying information;
A touch panel that transmits the information displayed on the display panel;
A control unit for controlling the drive of the touch panel,
The said touch panel is a touch panel of Claim 10. A display apparatus. Seen from the direction facing the transparent dielectric layer,
When the angle between the first direction and the direction in which the pixels are arranged is Φ,
The display device according to claim 11, satisfying any of 15 ° ≦ Φ ≦ 40 °, 50 ° ≦ Φ ≦ 75 °, −40 ° ≦ Φ ≦ −15 °, and −75 ° ≦ Φ ≦ −50 °. . Seen from the direction facing the transparent dielectric layer,
The display device according to claim 12, wherein the second direction has −Φ as an angle formed with a direction in which the pixels are arranged.

Images