JP2017227984A - Touch sensor electrode, touch panel, and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch sensor electrode, a touch panel and a display device capable of suppressing degradation in appearance qualities.SOLUTION: The touch sensor electrode includes a first grid 33SL and a second grid: the first grid 33SL includes a plurality of first electrodes 33SP and is constituted by a plurality of electrode lines extending in a direction different from a first direction D1 and from a second direction D2; the second grid includes a plurality of second electrodes and is constituted by a plurality of electrode lines extending in a direction different from the first direction D1 and from the second direction D2. The first grid 33SL and the second grid newly constitute a composite grid located on one virtual rectangular grid by the combination of these electrode lines. Each of the plurality of first electrodes 33SP is segmented by a gap SZ located at a position different from a grid point 33LX of the first grid 33SL in the first grid 33SL.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an electrode for a touch sensor, a touch panel, and a display device each including a plurality of electrodes composed of electrode wires.

  The touch panel mounted on the display device includes a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction orthogonal to the first direction. For example, the first electrode includes a plurality of first detection elements that have a rhombus shape and are arranged in the first direction, and first connection elements that connect the first detection elements adjacent to each other. Further, the second electrode includes a plurality of second detection elements having a rhombus shape and arranged in the second direction, and second connection elements that connect the second detection elements adjacent to each other (for example, a patent) Reference 1).

  The first electrode and the second electrode are disposed such that the plurality of first electrodes and the plurality of second electrodes intersect three-dimensionally. Then, based on the fact that the change in capacitance between each first electrode and each of the plurality of second electrodes is detected for each first electrode, a contact position such as a finger on the touch panel is detected.

JP 2014-146138 A

  As a material for forming the first electrode and the second electrode, a metal such as silver or copper is used in order to lower the resistance value for each electrode. Each of the first electrode and the second electrode is configured by arranging a plurality of thin electrode lines made of such metal in a region functioning as the above-described detection element or connection element, and the plurality of first electrodes A pattern in which a plurality of electrode lines intersect is formed in a plane where the electrodes are arranged or in a plane where the plurality of second electrodes are arranged. And one 1st electrode and one 2nd electrode are divided by providing a clearance gap between the electrode lines which comprise a pattern so that a cut may be made in the pattern of the said electrode line.

  In the touch panel having such a configuration, a mesh pattern is formed by overlapping a plurality of first electrodes and a plurality of second electrodes when viewed from an operation surface which is a surface with which a finger or the like is brought into contact. When the gap is conspicuous when viewed from the operation surface, the appearance homogeneity on the operation surface is lowered, and the quality of the appearance viewed from the operation surface is lowered. As a result, the quality of the image visually recognized on the display device is degraded, and the electrode line pattern is likely to be conspicuous due to reflection of external light when the display device is not displaying an image.

  An object of the present invention is to provide an electrode for a touch sensor, a touch panel, and a display device that can suppress deterioration in quality of appearance.

  An electrode for a touch sensor that solves the above problem includes a transparent dielectric layer having a first surface and a second surface that is the surface opposite to the first surface, and a plurality of electrodes disposed on the first surface. A first grid composed of electrode lines, the first grid being entirely located on one virtual rectangular grid, and a plurality of electrode lines arranged on the second surface A second grating configured so that the whole of the second grating is positioned on one virtual rectangular grating, and the first grating is arranged along the first direction. A first electrode composed of a plurality of first detection elements and a plurality of first connection elements each connecting the first detection elements adjacent to each other, along a second direction intersecting the first direction And extending in a direction different from the first direction and the second direction. The second grid is composed of a plurality of second detection elements arranged along the second direction, and a plurality of second connection elements each connecting the second detection elements adjacent to each other. A second electrode comprising a plurality of second electrodes arranged along the first direction, the electrode comprising a plurality of electrode lines extending in a direction different from the first direction and the second direction; When viewed from the direction facing the first surface, the first grating and the second grating newly constitute a composite grating positioned on one virtual rectangular grating by combining these, Each of the first electrodes is partitioned by a gap located in a location different from the lattice point of the first lattice in the first lattice.

  According to the above configuration, it is possible to suppress the missing portion from becoming larger in the lattice lines of the rectangular lattice that constitutes the first lattice, as compared with the configuration in which the gap is disposed at the position of the lattice point. Accordingly, since the gap is suppressed from being conspicuous when viewed from the direction facing the first surface, the deterioration of the quality of the appearance viewed from the operation surface in the touch panel including the touch sensor electrode can be suppressed, and is visually recognized on the display device. It is possible to prevent the electrode line pattern from becoming conspicuous due to the deterioration of the quality of the image to be displayed and the reflection of external light when the display device is not lit.

  In the above configuration, the first lattice includes a first dummy portion that is disposed between the first electrodes adjacent to each other in the second direction and is insulated from the first electrodes, Preferably, the gap is located between the first dummy portion and the first dummy portion.

  According to the above configuration, the first dummy portion is disposed between the first electrodes adjacent to each other, and forms one rectangular lattice pattern together with the first electrode. Accordingly, when viewed from the direction facing the first surface, the pattern formed from the electrode lines arranged on the first surface is easily visible in the first surface, and the region where the first electrode is located It can be suppressed that the region where one electrode is not located looks different. As a result, the quality of the appearance viewed from the operation surface on the touch panel is improved.

  In the above-described configuration, the plurality of gaps partitioning the first electrode are such that the positions of the gaps with respect to line segments connecting the grid points adjacent to each other in the first grid are regular along the end of the first electrode. They may be arranged so as to be lined up.

According to the said structure, compared with the structure where the position of the said clearance gap with respect to the said line segment is irregular, the design regarding the position of a clearance gap is easy.
The said structure WHEREIN: It is preferable that the said clearance gap is located in the location containing the midpoint of the line segment which connects the said mutually adjacent lattice point in the said 1st lattice.

  According to the said structure, compared with the structure by which a clearance gap is arrange | positioned in the position different from the said midpoint, it is easy to hold down the length of the electrode line which protrudes from a lattice point around the edge part of a 1st electrode. As a result, when a disconnection occurs in a portion of the electrode line that protrudes from the lattice point, a change that occurs in the capacitance formed between the first electrode and the second electrode is suppressed to a small level. Therefore, it is possible to suppress a decrease in detection accuracy of a contact position of a finger or the like on the touch panel.

  In the above-described configuration, the first dummy portion includes a plurality of first dummy elements arranged along the first direction, and the two first dummy elements adjacent to each other include the lattice points in the first lattice. It is preferable to be separated by a gap located at a different location.

  According to the above configuration, one of the gaps between the first electrode and the first dummy portion is not well formed compared to the configuration in which all the electrode lines constituting the first dummy portion are connected. However, the portion electrically connected to the first electrode in the first dummy portion can be kept small. Therefore, since the size of the electrostatic capacitance formed between such a portion and the second electrode can be suppressed to be small, it is possible to suppress a decrease in detection accuracy of a contact position such as a finger on the touch panel.

  In the above-described configuration, the plurality of gaps separating the first dummy elements are such that the positions of the gaps with respect to line segments connecting the grid points adjacent to each other in the first grid are along the end portions of the first dummy elements. And may be arranged so as to be arranged with regularity.

According to the said structure, compared with the structure where the position of the said clearance gap with respect to the said line segment is irregular, the design regarding the position of a clearance gap is easy.
In the above configuration, it is preferable that the gap between the two first dummy elements adjacent to each other is located at a location including a midpoint of a line segment connecting the lattice points adjacent to each other in the first grid.

According to the said structure, the 1st dummy element isolate | separated by the clearance gap of the position which is not conspicuous is suitably implement | achieved.
In the above configuration, the line formed by connecting the end portions of the first electrode in the first lattice as viewed from the direction facing the first surface has a polygonal line shape that repeats undulations. It is preferable to have.

  According to the above configuration, the first electrode defined by a gap that is different from the grid point, in particular, a gap that includes a midpoint of a line segment that connects adjacent grid points, that is, a gap that is inconspicuous. Realized.

  In the above configuration, each of the regions obtained by dividing the region where the plurality of first electrodes are arranged on the first surface, with each of the plurality of first connection elements being the center, is a node. The arrangement of the electrode lines constituting the first lattice is preferably different between the adjacent nodes.

  According to the above configuration, since the restrictions on the setting of the pitch of the first lattice and the size of the node are small compared to the configuration in which the arrangement of the electrode lines in one node is repeated in adjacent nodes, The required load can be reduced.

The said structure WHEREIN: The arrangement | positioning of the electrode line which comprises the said 1st grating | lattice in the said node may be repeated periodically among several said nodes.
According to the above configuration, the load required for the design can be reduced as compared with a configuration in which the arrangement of the electrode lines in one node is repeated.

  In the above configuration, in the first lattice, a portion separated from the periphery by four gaps located around one lattice point is a floating portion, and the first dummy portion includes a plurality of the floating portions. But you can.

  According to the above configuration, one of the gaps between the first electrode and the first dummy portion is not well formed compared to the configuration in which all the electrode lines constituting the first dummy portion are connected. However, the portion electrically connected to the first electrode in the first dummy portion can be kept small. Therefore, since the magnitude of the electrostatic capacitance formed between such a portion and the second electrode can be suppressed to be small, it is possible to suppress a decrease in the accuracy in detecting the contact position of a finger or the like on the touch panel.

  In the above configuration, the gap is a first gap, and the first grid is adjacent to the first gap that defines the first electrode and the electrode line that configures the first grid. And it may have the 2nd crevice located in a different place from the lattice point.

  According to the above configuration, even if the first gap that partitions the first electrode is not formed well, the electrode line is cut off by the second gap. Since the gap is not formed well, a portion electrically connected to the first electrode can be kept small. Therefore, since the size of the electrostatic capacitance formed between such a portion and the second electrode can be suppressed to be small, it is possible to suppress a decrease in detection accuracy of a contact position such as a finger on the touch panel.

  A touch panel that solves the above problems includes the touch sensor electrode, a cover layer that covers the touch sensor electrode, and a peripheral circuit that measures a capacitance between the first electrode and the second electrode. Prepare.

According to the above configuration, in the touch sensor electrode, it is possible to suppress a conspicuous gap that defines the first electrode, and thus it is possible to suppress deterioration in the quality of the appearance viewed from the operation surface.
A display device that solves the above problems includes a display panel that includes a plurality of pixels and displays information, a touch panel that transmits the information displayed on the display panel, and a control unit that controls driving of the touch panel. The touch panel is the touch panel.

  According to the above configuration, a display device including a touch panel in which deterioration in quality of the appearance viewed from the operation surface is suppressed is realized, and external light is displayed when the quality of an image visually recognized on the display device is reduced or when the display device is not lit. It is suppressed that the electrode line pattern becomes conspicuous due to the reflection.

  ADVANTAGE OF THE INVENTION According to this invention, the fall of the quality of the external appearance in a touch panel can be suppressed.

Sectional drawing which shows the cross-section in the display apparatus of one Embodiment. The top view which shows the planar structure of the electrode for touch sensors of one Embodiment, and the planar structure of a color filter layer. The schematic diagram for demonstrating the electric constitution of the touchscreen of one Embodiment. It is a figure which shows typically the structure of the area | region set virtually in the electrode for touch sensors of one Embodiment, (a) is a figure which shows the area | region set with respect to a sensing electrode line, (b) is The figure which shows the area | region set with respect to a drive electrode line, (c) is a figure which shows the structure at the time of superimposing these area | regions. The top view which shows arrangement | positioning of the sensing electrode line in the electrode for touch sensors of one Embodiment. The top view which shows arrangement | positioning of the sensing electrode line in the electrode for touch sensors of one Embodiment. The top view which shows arrangement | positioning of the drive electrode line in the electrode for touch sensors of one Embodiment. The top view which shows arrangement | positioning of the drive electrode line in the electrode for touch sensors of one Embodiment. The top view which shows the relationship between the position of the sensing electrode line in the electrode for touch sensors of one Embodiment, and the position of a drive electrode line. The top view which shows arrangement | positioning of the sensing electrode line in the electrode for touch sensors of a modification. The figure which shows an example of arrangement | positioning of the clearance gap provided in a sensing grid in the electrode for touch sensors of a modification. Sectional drawing which shows the cross-section in the display apparatus of a modification. Sectional drawing which shows the cross-section in the display apparatus of a modification.

An embodiment of a touch sensor electrode, a touch panel, and a display device will be described with reference to FIGS.
[Configuration of display device]
The configuration of the display device will be described with reference to FIG.

  As shown in FIG. 1, the display device 100 includes, for example, a laminated body in which 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 further drives the touch panel 20. And a control unit that controls 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 substantially rectangular display surface is partitioned on the surface of the display panel 10, and information such as an image based on image data 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.

  The display panel 10 is an EL panel that outputs colored light, and includes a red pixel that outputs red light, a green pixel that outputs green light, and a blue pixel that outputs blue light. If present, the above-described color filter layer 15 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 touch sensor electrode 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. It has sex.

  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 touch sensor electrode 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. 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. The transparent dielectric substrate 33 may be 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 cover layer 22 is formed from 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 touch sensor electrode 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, The 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 and pixel arrangement of electrodes for touch sensor]
With reference to FIG. 2, the planar structure of the touch sensor electrode 21 will be described focusing on the outer configuration of the sensing electrode 33SP and the drive electrode 31DP, and the planar structure of the color filter layer 15 in the display panel 10, that is, A pixel array of the display panel 10 will be described.

  FIG. 2 is a diagram showing an arrangement of the sensing electrode 33SP and the drive electrode 31DP when the touch sensor electrode 21 is viewed from the direction facing the surface of the transparent dielectric substrate 33, and is a vertical line surrounded by a two-dot chain line. Each of the belt-like regions extending along the direction indicates a region where one sensing electrode 33SP is arranged, and each of the belt-like regions extending along the horizontal direction surrounded by a two-dot chain line is arranged with one drive electrode 31DP. Indicates the area to be used. The numbers of sensing electrodes 33SP and drive electrodes 31DP are shown in a simplified manner. In order to facilitate understanding of the configuration of the sensing electrode 33SP and the drive electrode 31DP, only the three sensing electrodes 33SP from the left end are shown in FIG. 2, and the outer shape of the sensing electrode 33SP is shown in FIG. Only the drive electrode 31DP shows the outer shape of the drive electrode 31DP. In FIG. 2, the touch filter electrode 21 and a part of the display panel 10 are broken to show the color filter layer 15.

  As shown in FIG. 2, in the sensing electrode surface 33S, each of the plurality of sensing electrodes 33SP has a band shape that repeats constriction along a first direction D1, which is one direction, and the first direction D1 They are arranged along a second direction D2 perpendicular to each other.

  Each sensing electrode 33SP is composed of a plurality of sensing detection elements 33SPa and a plurality of sensing connection elements 33SPb. The plurality of sensing detection elements 33SPa are arranged along the first direction D1, and one sensing connection element 33SPb is disposed between two sensing detection elements 33SPa adjacent to each other in the first direction D1, and the sensing connection element 33SPb is The sensing detection elements 33SPa adjacent to each other are connected. That is, the sensing detection elements 33SPa and the sensing connection elements 33SPb are alternately arranged one by one along the first direction D1, and the sensing detection elements 33SPa are arranged at both ends of the sensing electrode 33SP in the first direction D1. Has been.

  Among the plurality of sensing detection elements 33SPa, the sensing detection element 33SPa located at one end in the first direction D1 is connected to a detection circuit which is an example of a peripheral circuit of the touch panel 20 via the sensing pad 33P, and the plurality of sensing electrodes 33SP. Each of the current values is measured by a detection circuit.

  Further, a plurality of sensing dummy portions 33SD are arranged on the sensing electrode surface 33S. Each sensing dummy portion 33SD has a band shape that repeats constriction along the first direction D1, and is located between the sensing electrodes 33SP adjacent to each other. Specifically, each sensing dummy portion 33SD is composed of a plurality of sensing dummy elements 33SDa arranged along the first direction D1, and the sensing dummy elements 33SDa adjacent to each other in the first direction D1 are not connected. Each sensing dummy portion 33SD is electrically insulated from the sensing electrode 33SP adjacent to the sensing dummy portion 33SD. Note that the sensing dummy portion 33SD is also disposed outside the sensing electrode 33SP disposed at the end portion in the second direction D2.

  Except for the sensing detection element 33SPa disposed at the end of the sensing electrode 33SP, the region occupied by the sensing detection element 33SPa has, for example, a substantially hexagonal shape when viewed from the direction facing the surface of the transparent dielectric substrate 33. . The region occupied by the sensing connection element 33SPb has, for example, a substantially rectangular shape when viewed from the direction facing the surface of the transparent dielectric substrate 33, and sensing one side of the sensing detection element 33SPa adjacent to the sensing connection element 33SPb. Shared with the detection element 33SPa.

  The area occupied by each sensing electrode 33SP corresponds to an area obtained by translating the area occupied by one sensing electrode 33SP in the second direction D2, and the sensing detection elements 33SPa adjacent to each other in the second direction D2 are mutually connected. They are lined up without being electrically connected.

  Except for the end portion in the second direction D2, the sensing dummy portion 33SD occupies a region defined by two sensing electrodes 33SP adjacent to each other in the second direction D2. This region is a substantially octagonal shape sandwiched by the four sensing detection elements 33SPa and the two sensing connection elements 33SPb in the two sensing electrodes 33SP adjacent to each other when viewed from the direction facing the surface of the transparent dielectric substrate 33. These regions have a shape aligned along the first direction D1.

  Each sensing electrode 33SP and each sensing dummy portion 33SD are configured by sensing electrode wires that are thin wire conductors. The sensing electrode wire is made of a metal film such as copper, silver, or aluminum. The sensing electrode line is formed, for example, by patterning a metal film formed on the sensing electrode surface 33S by etching. The

In the drive electrode surface 31S, each of the plurality of drive electrodes 31DP has a band shape that repeats constriction along the second direction D2, and is arranged along the first direction D1.
Each drive electrode 31DP is composed of a plurality of drive detection elements 31DPa and a plurality of drive connection elements 31DPb. The plurality of drive detection elements 31DPa are arranged along the second direction D2, and one drive connection element 31DPb is disposed between two drive detection elements 31DPa adjacent to each other in the second direction D2, and the drive connection element 31DPb is The drive detection elements 31DPa adjacent to each other are connected. That is, the drive detection elements 31DPa and the drive connection elements 31DPb are alternately arranged one by one along the second direction D2, and the drive detection elements 31DPa are arranged at both ends of the drive electrode 31DP in the second direction D2. Is done.

  Of the plurality of drive detection elements 31DPa, the drive detection element 31DPa located at one end in the second direction D2 is connected to a selection circuit which is an example of a peripheral circuit of the touch panel 20 via the drive pad 31P, and the plurality of drive electrodes 31DP Each is selected by the selection circuit by receiving a drive signal output from the selection circuit.

  A plurality of drive dummy portions 31DD are further arranged on the drive electrode surface 31S. Each drive dummy portion 31DD has a band shape that repeats constriction along the second direction D2, and is located between adjacent drive electrodes 31DP. Specifically, each drive dummy portion 31DD is composed of a plurality of drive dummy elements 31DDa arranged along the second direction D2, and the drive dummy elements 31DDa adjacent to each other in the second direction are not connected. Each drive dummy portion 31DD is electrically insulated from the drive electrode 31DP adjacent to the drive dummy portion 31DD. The drive dummy portion 31DD is also disposed outside the drive electrode 31DP disposed at the end portion in the first direction D1.

  Except for the drive detection element 31DPa disposed at the end of the drive electrode 31DP, the region occupied by the drive detection element 31DPa has, for example, a substantially hexagonal shape when viewed from the direction facing the surface of the transparent dielectric substrate 33. . The region occupied by the drive connection element 31DPb has, for example, a substantially rectangular shape when viewed from the direction facing the surface of the transparent dielectric substrate 33. One side of the drive detection element 31DPa adjacent to the drive connection element 31DPb is driven by the drive connection element 31DPb. Shared with the detection element 31DPa.

  The region occupied by each drive electrode 31DP corresponds to a region obtained by translating the region occupied by one drive electrode 31DP in the first direction D1, and the drive detection elements 31DPa adjacent to each other in the first direction D1 are mutually connected. They are lined up without being electrically connected.

  Except for the end portion in the first direction D1, the drive dummy portion 31DD occupies a region defined by two drive electrodes 31DP adjacent to each other in the first direction D1. This region is a substantially octagonal shape sandwiched between the four drive detection elements 31DPa and the two drive connection elements 31DPb in the two drive electrodes 31DP adjacent to each other when viewed from the direction facing the surface of the transparent dielectric substrate 33. These regions have a shape aligned along the second direction D2.

  Each drive electrode 31DP and each drive dummy portion 31DD are configured by drive electrode lines which are thin wire conductors. A metal film such as copper, silver or aluminum is used as a material for forming the drive electrode line. The drive electrode line is formed, for example, by patterning a metal film formed on the drive electrode surface 31S by etching. The

  The sensing electrode 33SP and the drive electrode 31DP are disposed so that the sensing connection element 33SPb and the drive connection element 31DPb overlap each other when viewed from the direction facing the surface of the transparent dielectric substrate 33. In other words, when viewed from the direction facing the surface of the transparent dielectric substrate 33, a portion of the sensing electrode 33SP that overlaps the drive electrode 31DP is the sensing connection element 33SPb, and the sensing electrode 33SP is within the drive electrode 31DP. The portion that overlaps the drive connection element 31DPb.

  Further, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the sensing detection element 33SPa faces the drive dummy element 31DDa, and the drive detection element 31DPa faces the sensing dummy element 33SDa. When viewed from the direction facing the surface of the transparent dielectric substrate 33, a part of the sensing dummy element 33SDa faces a part of the drive dummy element 31DDa.

  When viewed from the direction facing the surface of the transparent dielectric substrate 33, the entire region where the sensing electrode 33SP and the drive electrode 31DP are arranged is evenly centered on each of the pair of the sensing connection element 33SPb and the drive connection element 31DPb. Each of the divided areas is defined as a node N. The node N is an area including a part of the sensing detection element 33SPa, a part of the drive detection element 31DPa, a part of the sensing dummy element 33SDa, and a part of the drive dummy element 31DDa in addition to the sensing connection element 33SPb and the drive connection element 31DPb. Thus, the rectangular area is defined by the two-dot chain line in FIG.

  The black matrix 15a included in the color filter layer 15 forms a rectangular lattice pattern. The rectangular lattice pattern is composed of a plurality of unit lattices arranged along the first direction D1 and the second direction D2. In a region defined by each unit cell, any one of 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 is arranged. The

  In the color filter layer 15, for example, each of the red coloring layer 15R, the green coloring layer 15G, and the blue coloring layer 15B is sequentially repeated one by one along the second direction D2. 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 include a red colored layer 15R, a green colored layer 15G, and The blue colored layers 15B are arranged along the second direction D2 while maintaining the order of arrangement. Further, the plurality of red coloring layers 15R are continuously arranged along the first direction D1, the plurality of green coloring layers 15G are arranged continuously along the first direction D1, and the plurality of blue coloring layers 15B are They are continuously arranged along the first direction D1. In other words, the plurality of pixels 15P are arranged in a stripe shape extending along the first direction D1.

  The width along the first direction D1 in each pixel 15P is the first pixel width WP1, the width along the second direction D2 is the second pixel width WP2, and along the second direction D2 in each colored layer. The width is the third pixel width WP3. Each of the first pixel width WP1, the second pixel width WP2, and the third pixel width WP3 is determined based on the resolution required for the display device 100 and the like.

[Electrical configuration of touch panel]
With reference to FIG. 3, the electrical configuration of touch panel 20 will be described together with the function of the control unit provided 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 shown in FIG. 3, 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.

[Virtual Area Configuration]
With reference to FIG. 4, the configuration of regions virtually set with respect to the arrangement of sensing electrode 33SP, sensing dummy portion 33SD, drive electrode 31DP, and drive dummy portion 31DD will be described.

  FIG. 4A shows four nodes N arranged in the first direction D1 and the second direction D2 in the virtual sensing electrode region SPK and the virtual sensing dummy region SDK set with respect to the arrangement of the sensing electrode 33SP and the sensing dummy part 33SD. It is a figure shown about. The virtual sensing electrode area SPK is composed of a plurality of virtual sensing detection areas SPKa and a plurality of virtual sensing connection areas SPKb, and the virtual sensing dummy area SDK is composed of a plurality of virtual sensing dummy element areas SDKa.

  The virtual sensing detection area SPKa is an arrangement area of the virtual sensing detection element 33SPa, the virtual sensing connection area SPKb is an arrangement area of the virtual sensing connection element 33SPb, and the virtual sensing dummy element area SDKa is a virtual area. This is an arrangement area of the sensing dummy element 33SDa. The shapes and sizes of the virtual sensing detection area SPKa and the virtual sensing connection area SPKb are set to the shapes and sizes desired for the sensing electrode 33SP according to the detection accuracy required for the touch panel 20 and the like. That is, the virtual sensing electrode area SPK indicates an area occupied by the ideal sensing electrode 33SP at the design stage, and the virtual sensing dummy area SDK indicates an area occupied by the ideal sensing dummy portion 33SD at the design stage.

  The virtual sensing detection area SPKa has, for example, a substantially hexagonal shape, and the virtual sensing connection area SPKb has, for example, a rectangular shape. One node N includes one virtual sensing connection region SPKb located at the center of the node N, and a virtual sensing detection region SPKa connected to the virtual sensing connection region SPKb at one end in the first direction D1. Half of the virtual sensing connection area SPKb and half of the virtual sensing detection area SPKa connected at the other end in the first direction D1 are included. Half of the virtual sensing detection area SPKa is one of the areas obtained by dividing the virtual sensing detection area SPKa into two equal parts by a straight line extending along the second direction D2. In other words, in one node N, the virtual sensing detection area SPKa extends from the virtual sensing connection area SPKb toward the end of the first direction D1 in the node N while gradually increasing the width in the second direction D2. It has a trapezoidal shape.

  Specifically, in the example shown in FIG. 4A, the virtual sensing detection area SPKa extends slightly from the virtual sensing connection area SPKb while keeping the width in the second direction D2 constant, and then in the second direction D2. It has a shape that extends while gradually widening the width. Not limited to this, the virtual sensing detection area SPKa does not have a constant width in the second direction D2, but has a shape extending from the virtual sensing connection area SPKb while gradually increasing the width in the second direction D2. You may do it. Further, the width of the virtual sensing detection region SPKa in the second direction D2 at the end of the node N in the first direction D1 may be equal to or less than the length of one side of the node N.

  The virtual sensing dummy element region SDKa is a region obtained by dividing an octagonal region sandwiched between the four virtual sensing detection regions SPKa and the two virtual sensing connection regions SPKb into two equal parts by a straight line extending along the second direction D2. Each. The virtual sensing dummy area SDK includes a virtual sensing dummy element area SDKa having the same shape as one virtual sensing dummy element area SDKa, and a virtual sensing dummy element area SDKa having a shape obtained by rotating the virtual sensing dummy element area SDKa by 180 °. , And are arranged alternately along the first direction D1.

  One node N includes four half of the virtual sensing dummy element region SDKa, that is, any one of the regions obtained by bisecting the virtual sensing dummy element region SDKa by a straight line extending in the first direction D1, Two virtual sensing dummy element regions SDKa are arranged on one side and two on the other side in the second direction D2 with respect to the virtual sensing connection region SPKb.

  FIG. 4B is a diagram showing a virtual drive electrode region DPK and a virtual drive dummy region DDK set with respect to the arrangement of the drive electrode 31DP and the drive dummy portion 31DD for the four nodes N. The virtual drive electrode area DPK is composed of a plurality of virtual drive detection areas DPKa and a plurality of virtual drive connection areas DPKb, and the virtual drive dummy area DDK is composed of a plurality of virtual drive dummy element areas DDKa.

  The virtual drive detection area DPKa is an arrangement area for the virtual drive detection element 31DPa, the virtual drive connection area DPKb is an arrangement area for the virtual drive connection element 31DPb, and the virtual drive dummy element area DDKa is a virtual area. This is an arrangement area of the drive dummy element 31DDa. The shapes and sizes of the virtual drive detection area DPKa and the virtual drive connection area DPKb are set to shapes and sizes desired for the drive electrode 31DP according to the detection accuracy required for the touch panel 20 and the like. That is, the virtual drive electrode area DPK indicates an area occupied by the ideal drive electrode 31DP in the design stage, and the virtual drive dummy area DDK indicates an area occupied by the ideal drive dummy portion 31DD in the design stage.

  The virtual drive detection area DPKa is approximately equal to the shape and size of the virtual sensing detection area SPKa rotated by 90 °, and the virtual drive connection area DPKb is approximately equal to the shape and size of the virtual sensing connection area SPKb. Further, the virtual drive dummy element area DDKa is substantially equal to the shape and size of the virtual sensing dummy element area SDKa rotated by 90 °.

  That is, the virtual drive detection area DPKa has, for example, a substantially hexagonal shape, and the virtual drive connection area DPKb has, for example, a rectangular shape. One node N includes one virtual drive connection area DPKb located at the center of the node N, and a virtual drive detection area DPKa connected to each of the virtual drive connection area DPKb and both ends in the second direction D2. Half and included. A half of the virtual drive detection area DPKa is one of the areas obtained by dividing the virtual drive detection area DPKa into two equal parts by a straight line extending along the first direction D1. In other words, in one node N, the virtual drive detection area DPKa extends from the virtual drive connection area DPKb toward the end of the node N in the second direction D2 while gradually increasing the width in the first direction D1. It has a trapezoidal shape.

  The virtual drive dummy element area DDKa is an area obtained by equally dividing an octagonal area sandwiched between the four virtual drive detection areas DPKa and the two virtual drive connection areas DPKb by a straight line extending along the first direction D1. Each. The virtual drive dummy area DDK includes a virtual drive dummy element area DDKa having the same shape as one virtual drive dummy element area DDKa, and a virtual drive dummy element area DDKa having a shape obtained by rotating the virtual drive dummy element area DDKa by 180 °. , And are arranged alternately along the second direction D2.

  One node N includes four half of the virtual drive dummy element area DDKa, that is, any one of the areas obtained by dividing the virtual drive dummy element area DDKa into two equal parts by a straight line extending in the second direction D2, Two virtual drive dummy element regions DDKa are arranged on one side in the first direction D1 with respect to the virtual drive connection region DPKb and two on the other side.

  FIG. 4C is a diagram showing a configuration in which the virtual sensing electrode region SPK and the virtual sensing dummy region SDK are overlapped with the virtual drive electrode region DPK and the virtual drive dummy region DDK for the four nodes N.

  As shown in FIG. 4C, one virtual sensing connection area SPKb and one virtual drive connection area DPKb face each other, and the outer shapes of these areas match. Further, one virtual sensing detection area SPKa faces two virtual drive dummy element areas DDKa, and one virtual drive detection area DPKa faces two virtual sensing dummy element areas SDKa. Between the virtual sensing detection area SPKa and the virtual drive detection area DPKa that are arranged around the virtual sensing connection area SPKb and the virtual drive connection area DPKb, there is an inclination with respect to each of the first direction D1 and the second direction D2. A gap KG extending in the direction is formed.

  In each node N, when a drive signal is input to the drive electrode 31DP between the sensing connection element 33SPb arranged in the virtual sensing connection area SPKb and the drive connection element 31DPb arranged in the virtual drive connection area DPKb, From the drive electrode 31DP to the sensing electrode 33SP, an electric field is formed that extends substantially linearly along the direction in which these electrodes are opposed.

  In each node N, the sensing detection element 33SPa arranged in the virtual sensing detection area SPKa and the drive detection element 31DPa arranged in the virtual drive detection area DPKa do not overlap with each other, and therefore, between these detection elements 33SPa and 31DPa. Then, when a drive signal is inputted to the drive electrode 31DP, an electric field extending obliquely from the drive electrode 31DP to the sensing electrode 33SP is formed. Such an electric field is likely to be electrically influenced from the outside of the touch sensor electrode 21, so that it easily changes when a human finger or the like approaches the touch panel 20. The drive electrode 31 DP and the sensing electrode based on the change in the electric field The change in capacitance with 33SP tends to be significant.

  The virtual sensing detection area SPKa and the virtual drive detection area DPKa may be arranged such that the gap KG is not formed. However, when the gap KG is formed, the obliquely extending electric field passes through the gap KG. Therefore, the sensitivity of detecting the contact position of a human finger or the like on the touch panel 20 is increased.

[Configuration of sensing electrode]
With reference to FIG. 5 and FIG. 6, the detailed structure of the electrode line arrange | positioned at the sensing electrode surface 33S is demonstrated.

  FIG. 5 is a diagram illustrating portions included in the four nodes N arranged in the first direction D1 and the second direction D2 among the electrode lines arranged on the sensing electrode surface 33S. In FIG. 5, the boundary between the virtual sensing electrode region SPK and the virtual sensing dummy region SDK described above is indicated by a virtual line K1, and the boundary between the virtual sensing dummy element regions SDKa adjacent to each other is indicated by a virtual line K2. That is, the imaginary line K1 is along the first direction D1 along two inclined portions extending in a direction not coincident with any of the first direction D1, the second direction D2, the first intersecting direction C1, and the second intersecting direction C2. It has a shape in which a straight part extending in the direction is sandwiched. Further, the virtual line K2 has a linear shape extending along the second direction D2.

  As shown in FIG. 5, when viewed from the direction facing the surface of the transparent dielectric substrate 33, a sensing grid 33SL having a rectangular grid pattern composed of a plurality of electrode lines is arranged on the sensing electrode surface 33S. Yes. The sensing grid 33SL includes a plurality of sensing electrode lines 33SRa extending along the first intersecting direction C1 and a plurality of sensing electrode lines 33SRb extending along the second intersecting direction C2 orthogonal to the first intersecting direction C1. . The unit grid 33LA in the sensing grid 33SL has a square shape in which the length of one side is the sensing grid pitch P1 when viewed from the direction facing the surface of the transparent dielectric substrate 33. The first intersecting direction C1 is different from both the first direction D1 and the second direction D2, and is a direction inclined with respect to any of these directions. The second intersecting direction C2 is also the first direction D1 and the second direction D2. Unlike any of the directions D2, the direction is inclined with respect to any of these directions.

  The sensing grid 33SL includes a plurality of sensing electrodes 33SP and a plurality of sensing dummy portions 33SD. In the sensing grid 33SL, the sensing electrode wire 33SR constituting the sensing electrode 33SP and the sensing electrode wire 33SR constituting the sensing dummy portion 33SD are insulated by providing a gap SZ between these electrode wires. Further, two adjacent sensing dummy elements 33SDa have a gap SZ between the sensing electrode line 33SR constituting one sensing dummy element 33SDa and the sensing electrode line 33SR constituting the other sensing dummy element 33SDa. Are separated by

  In other words, the sensing grid 33SL has a grid shape with a cut between the sensing electrode 33SP and the sensing dummy portion 33SD and between the sensing dummy element 33SDa and the sensing dummy element 33SDa. When these cuts are virtually connected, one continuous rectangular lattice pattern is formed in a region where the plurality of sensing electrodes 33SP and the plurality of sensing dummy portions 33SD are arranged on the sensing electrode surface 33S. That is, the sensing grid 33SL is configured by a grid part that forms the sensing electrode 33SP and a grid part that forms the sensing dummy element 33SDa, and the entire sensing grid 33SL is positioned on one virtual rectangular grid.

  On the other hand, the position of the sensing grid 33SL in one node N, that is, the arrangement of the electrode lines constituting the sensing grid 33SL in the node N with respect to the center of one node N is different for each node N. Therefore, the arrangement of the gap SZ with respect to the sensing grid 33SL is also different for each node N.

  Depending on the sensing grid pitch P1 and the size of the node N, the plurality of nodes N may include the node N having the same position of the sensing grid 33SL, but at least two adjacent to the first direction D1. In the node N, the positions of the sensing grids 33SL are different from each other, and in the two nodes N adjacent in the second direction D2, the positions of the sensing grids 33SL are different from each other.

  The arrangement of the gap SZ will be described in detail with reference to FIG. FIG. 6 is an enlarged view showing a portion included in one node N among the electrode lines arranged on the sensing electrode surface 33S. In FIG. 6, the electrode lines constituting the sensing electrode 33SP are indicated by thick black lines, and the electrode lines constituting the sensing dummy portion 33SD are indicated by white lines.

  In the sensing grid 33SL, the intersection of the sensing electrode lines 33SR is the grid point 33LX. Further, in the virtual rectangular lattice where the sensing lattice 33SL is located, a portion corresponding to one side of a square constituting the unit lattice is a lattice side 33LS. The lattice side 33LS is located between two lattice points 33LX adjacent to each other, and the sensing electrode line 33SR is located on the lattice side 33LS.

  As in the area A1 shown in an enlarged view in FIG. 6, at the boundary between the sensing electrode 33SP and the sensing dummy portion 33SD, the lattice side 33LS intersecting the virtual line K1 is between two lattice points 33LX sandwiching the lattice side 33LS. The gap SZ is located at the center of the line, that is, the position including the midpoint C of the line segment connecting the two lattice points 33LX. In other words, the gap SZ is located at a position including the midpoint closest to the intersection of the virtual line K1 and the grid side 33LS among the midpoints of the grid sides 33LS.

  Similarly, at the boundary between the two sensing dummy elements 33SDa as in the region A2, with respect to the lattice side 33LS that intersects the virtual line K2, the central portion between the two lattice points 33LX sandwiching the lattice side 33LS, that is, 2 The gap SZ is located at a position including the midpoint C of the line segment connecting the two grid points 33LX.

When the virtual lines K1 and K2 intersect with the lattice point 33LX, the gap SZ may be disposed at a position including any of the midpoints of the lattice side 33LS around the lattice point 33LX.
In such a configuration, the length L1 of the end portion 33SS, which is a portion protruding from the lattice point 33LX toward the boundary between the sensing electrode 33SP and the sensing dummy portion 33SD in the sensing electrode 33SP, is all the sensing lattice pitch P1. Less than half of

  As described above, in the sensing grid 33SL, each of the plurality of sensing electrodes 33SP is partitioned by the gap SZ, and the gap SZ connects the grid points 33LX adjacent to each other along the first intersecting direction C1 or the second intersecting direction C2. It is located at a location including the midpoint C of the line segment. Similarly, in the sensing grid 33SL, two sensing dummy elements 33SDa adjacent to each other are separated by a gap SZ, and the gap SZ defines a grid point 33LX adjacent to each other along the first intersecting direction C1 or the second intersecting direction C2. It is located at a location including the midpoint C of the connecting line segment.

  In the above configuration, the region occupied by the sensing electrode 33SP has a shape that is slightly recessed inward or protrudes outward from the virtual sensing electrode region SPK. Specifically, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the end portion of the portion constituting the sensing electrode 33SP in the sensing grid 33SL, that is, the end portion of the end portion 33SS is connected. The line has a polygonal line shape that repeats fine undulations. Similarly, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the line formed by connecting the end portions of the sensing dummy element 33SDa in the sensing grid 33SL repeats fine undulations. It has a polygonal line shape.

[Configuration of drive electrode]
With reference to FIG. 7 and FIG. 8, the detailed configuration of the electrode lines arranged on the drive electrode surface 31S will be described.

  FIG. 7 is a diagram showing portions included in four nodes N arranged in the first direction D1 and the second direction D2 among the electrode lines arranged on the drive electrode surface 31S. In FIG. 7, the boundary between the virtual drive electrode area DPK and the virtual drive dummy area DDK described above is indicated by a virtual line K3, and the boundary between the virtual drive dummy element areas DDKa adjacent to each other is indicated by a virtual line K4. FIG. 8 is an enlarged view showing a portion included in one node N among the electrode lines arranged on drive electrode surface 31S. In FIG. 8, the electrode lines constituting drive electrode 31DP are shown. Are indicated by thick black lines, and electrode lines constituting the drive dummy portion 31DD are indicated by white lines.

  As shown in FIG. 7, when viewed from the direction facing the surface of the transparent dielectric substrate 33, a drive grid 31DL having a rectangular grid pattern composed of a plurality of electrode lines is disposed on the drive electrode surface 31S. Yes. The drive grid 31DL includes a plurality of drive electrode lines 31DRa extending along the first intersecting direction C1 and a plurality of drive electrode lines 31DRb extending along the second intersecting direction C2. The unit lattice 31LA in the drive lattice 31DL has a square shape in which the length of one side is the drive lattice pitch P2 when viewed from the direction facing the surface of the transparent dielectric substrate 33. The drive grid pitch P2 is equal to the sensing grid pitch P1.

  Drive lattice 31DL includes a plurality of drive electrodes 31DP and a plurality of drive dummy portions 31DD. Drive lattice 31DL has a lattice shape having a gap DZ between drive electrode 31DP and drive dummy portion 31DD and between drive dummy element 31DDa and drive dummy element 31DDa.

  When the gaps that are the gaps DZ are virtually connected, one continuous rectangular lattice pattern is formed in the region where the plurality of drive electrodes 31DP and the plurality of drive dummy portions 31DD are arranged on the drive electrode surface 31S. . That is, the drive grid 31DL includes a grid portion that configures the drive electrode 31DP and a grid portion that configures the drive dummy element 31DDa, and the entire drive grid 31DL is positioned on one virtual rectangular grid.

  On the other hand, the position of the drive grid 31DL in one node N, that is, the arrangement of the electrode lines constituting the drive grid 31DL in the node N with respect to the center of one node N is different for each node N. Therefore, the arrangement of the gap DZ with respect to the drive grid 31DL is also different for each node N.

  Depending on the drive grid pitch P2 and the size of the node N, the plurality of nodes N may include the node N having the same position of the drive grid 31DL, but at least the first direction D1 or the second direction D2 In two nodes N adjacent to each other, the positions of the drive lattices 31DL are different from each other.

  As shown in FIG. 8, in the drive lattice 31DL, a portion where the drive electrode line 31DR intersects is a lattice point 31LX. Further, in the virtual rectangular lattice where the drive lattice 31DL is located, a portion corresponding to one side of the square constituting the unit lattice is the lattice side 31LS. The lattice side 31LS is located between two lattice points 31LX adjacent to each other, and the drive electrode line 31DR is located on the lattice side 31LS.

  Also in the drive grid 31DL, each of the plurality of drive electrodes 31DP is partitioned by the gap DZ, and the gap DZ is a line segment connecting the grid points 31LX adjacent to each other along the first intersecting direction C1 or the second intersecting direction C2. It is located at a place including the midpoint. In other words, at the boundary between the drive electrode 31DP and the drive dummy portion 31DD, the gap between the grid side 31LS intersecting the virtual line K3 and the midpoint of the line segment connecting the two grid points 31LX sandwiching the grid side 31LS. DZ is located.

  Similarly, in the drive grid 31DL, the two drive dummy elements 31DDa adjacent to each other are separated by the gap DZ, and the gap DZ defines the grid points 31LX adjacent to each other along the first intersecting direction C1 or the second intersecting direction C2. It is located at a location that includes the midpoint of the connecting line segment. That is, at the boundary between the two drive dummy elements 31DDa, the gap DZ is located at a position including the midpoint of the line segment connecting the two grid points 31LX sandwiching the grid side 31LS with respect to the grid side 31LS intersecting the virtual line K4. doing.

  Accordingly, in the drive electrode 31DP, the length of the end portion 31DS, which is a portion protruding from the lattice point 31LX toward the boundary between the drive electrode 31DP and the drive dummy portion 31DD, is all two times the drive lattice pitch P2. 1 or less.

  In such a configuration, the region occupied by the drive electrode 31DP has a shape that is slightly recessed inward or protrudes outward from the virtual drive electrode region DPK. That is, as viewed from the direction facing the surface of the transparent dielectric substrate 33, a line formed by connecting the tip of the end portion 31DS that is the end portion of the portion constituting the drive electrode 31DP in the drive lattice 31DL is It has a polygonal line shape that repeats fine undulations. Similarly, as viewed from the direction facing the surface of the transparent dielectric substrate 33, the line formed by connecting the end portions of the drive dummy element 31DDa in the drive lattice 31DL repeats fine undulations. It has a polygonal line shape.

[Composition of composite lattice]
With reference to FIG. 9, the pattern formed by superimposing the electrode line arrange | positioned on the sensing electrode surface 33S and the electrode line arrange | positioned on the drive electrode surface 31S is demonstrated. In FIG. 9, the sensing electrode line 33SR is indicated by a thick black line and the drive electrode line 31DR is indicated by a white line in order to facilitate understanding of the overlap of the electrode lines.

  As shown in FIG. 9, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the sensing grating 33 </ b> SL and the drive grating 31 </ b> DL have a sensing grating for each of the first intersecting direction C <b> 1 and the second intersecting direction C <b> 2. They overlap with each other by a half of the pitch P1, that is, half the length of the drive grid pitch P2. Thus, the sensing grating 33SL and the drive grating 31DL newly constitute a composite grating 30L positioned on one virtual rectangular grating by a combination thereof. That is, when viewed from the direction facing the surface of the transparent dielectric substrate 33, a set of a plurality of sensing electrodes 33SP, a set of a plurality of drive electrodes 31DP, a set of a plurality of sensing dummy portions 33SD, and a plurality of drive dummy portions 31DD Is composed of the composite lattice 30L.

  The unit lattice 30LA in the composite lattice 30L has a square shape in which the length of one side is the composite lattice pitch P3 when viewed from the direction facing the surface of the transparent dielectric substrate 33. The composite grating pitch P3 is half the length of the sensing grating pitch P1 and half the length of the drive grating pitch P2. That is, in the present embodiment, the lengths of all the end portions 33SS included in the sensing electrode 33SP and the lengths of all the end portions 31DS included in the drive electrode 31DP are combined in the direction in which the end portions 33SS and 31DS extend. The length is equal to or less than the grating pitch P3.

  In the above configuration, the pattern formed by superimposing the electrode lines arranged on the sensing electrode surface 33S and the electrode lines arranged on the drive electrode surface 31S is inclined with respect to the first direction D1 and the second direction D2. Have a lattice shape. Therefore, generation of moire due to interference between the rectangular lattice pattern formed by the black matrix 15a, that is, the rectangular lattice pattern extending along the first direction D1 and the second direction D2, and the rectangular lattice pattern formed by the composite lattice 30L. It can be suppressed. The angle formed between the first direction D1 and the first intersecting direction C1, and the angle formed between the second direction D2 and the second intersecting direction C2 are the first pixel width WP1, the second pixel width WP2, and the first It is preferable to set the angle at which moire is further suppressed according to the three-pixel width WP3.

  In addition, a sensing dummy portion 33SD is disposed between the sensing electrodes 33SP adjacent to each other to form one rectangular lattice pattern together with the sensing electrodes 33SP, and a drive dummy portion 31DD is disposed between the adjacent drive electrodes 31DP. Thus, one rectangular lattice pattern is formed together with the drive electrode 31DP. Therefore, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the region where the electrode is located and the region where the electrode is not located are suppressed from being viewed differently, and the appearance of the touch panel 20 as viewed from the operation surface 20S is uniform. Sexuality is enhanced.

[Action]
The effect | action which the electrode wire structure of this embodiment brings is demonstrated.
When the gaps SZ and DZ are provided at the positions of the grid points 33LX and 31LX in the sensing grid 33SL and the drive grid 31DL, the grid lines of the rectangular grids constituting the sensing grid 33SL and the drive grid 31DL are formed by one gap SZ and DZ. In particular, both the line extending in the first intersecting direction C1 and the line extending in the second intersecting direction C2 are missing.

  When the electrode lines 33SR and 31DR are formed by etching, it is difficult to accurately form the gaps SZ and DZ so that the widths of the gaps SZ and DZ are the same as the line widths of the electrode lines 33SR and 31DR. Is likely to be larger than the lattice points 33LX and 31LX, that is, the intersections of the electrode lines. As a result, when the gaps SZ and DZ are provided at the positions of the grid points 33LX and 31LX, the configurations of the sensing grid 33SL and the drive grid 31DL are compared to the case where the gaps SZ and DZ are provided at positions different from the grid points 33LX and 31LX. Among the lattice lines of the rectangular lattice, the missing portion extends to both the line extending in the first intersecting direction C1 and the line extending in the second intersecting direction C2.

  As described above, when the gaps SZ and DZ are provided at the positions of the grid points 33LX and 31LX in the sensing grid 33SL and the drive grid 31DL, the gaps SZ and DZ are viewed from the direction facing the surface of the transparent dielectric substrate 33. Easy to stand out. On the other hand, in the present embodiment, since the gaps SZ and DZ are provided at positions different from the lattice points 33LX and 31LX, the gaps SZ and DZ are viewed from the direction facing the surface of the transparent dielectric substrate 33. Conspicuousness is suppressed. Therefore, the homogeneity of the appearance seen from the operation surface 20S of the touch panel 20 is improved. That is, the deterioration of the quality of the appearance on the operation surface 20S is suppressed, and the electrode line pattern may be conspicuous due to the deterioration of the quality of the image visually recognized on the display device 100 or the reflection of external light when the display device 100 is not lit. It can be suppressed.

  In the present embodiment, the gaps SZ and DZ are provided at locations including the midpoint of the line segment connecting the lattice points 33LX and 31LX adjacent to each other. The sensing grating 33SL and the drive grating 31DL are overlapped by being shifted by a half length of the sensing grating pitch P1 and the driving grating pitch P2, thereby constituting a composite grating 30L. In such a configuration, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the gap SZ in the sensing grid 33SL often overlaps the drive electrode line 31DR constituting the drive grid 31DL, and the gap DZ in the drive grid 31DL. Often overlaps the sensing electrode line 33SR constituting the sensing grid 33SL. Therefore, as compared with the configuration in which the gaps SZ and DZ are provided at locations other than the midpoint of the line segment connecting the adjacent lattice points 33LX and 31LX, the gap is viewed from the direction facing the surface of the transparent dielectric substrate 33. It is further suppressed that SZ and DZ are conspicuous.

  Further, since the gaps SZ and DZ are provided at locations including the midpoints of the line segments connecting the adjacent lattice points 33LX and 31LX, the length of the end portion 33SS in the sensing electrode 33SP and the drive electrode 31DP The length of the end portion 31DS is suppressed to a length equal to or less than the composite grating pitch P3. Therefore, compared to the case where the lengths of the end portions 33SS and 31DS are longer than the composite grating pitch P3, even if the electrode lines are disconnected at the end portions 33SS and 31DS, the sensing electrode 33SP and the drive electrode 31DP are used. The length of the electrode wire separated from the wire becomes shorter. As a result, when the electrode wire is disconnected at the end portions 33SS and 31DS, the change that occurs in the capacitance between the sensing electrode 33SP and the drive electrode 31DP is suppressed to a small level. A decrease in position detection accuracy can be suppressed.

  In addition, the sensing dummy portion 33SD is divided into a plurality of sensing dummy elements 33SDa. If the gap SZ is not precisely formed due to a defective formation of the sensing electrode line 33SR or the like, and the sensing electrode 33SP and the sensing dummy part 33SD are electrically connected, the sensing dummy part 33SD and the drive electrode 31DP The capacitance formed between the sensing electrode 33SP and the drive electrode 31DP affects the magnitude of the capacitance detected as a capacitance between the sensing electrode 33SP and the drive electrode 31DP. Change detection accuracy decreases.

  On the other hand, in the configuration in which the sensing dummy portion 33SD is divided into a plurality of sensing dummy elements 33SDa, the sensing electrode 33SP and the sensing are temporarily compared with the configuration in which all the electrode wires constituting the sensing dummy portion 33SD are connected. Even if one of the gaps SZ between the dummy portion 33SD is filled, the portion of the sensing dummy portion 33SD that is electrically connected to the sensing electrode 33SP can be kept small. Therefore, the size of the capacitance formed between such a portion and the drive electrode 31DP can be kept small. The same applies to the drive dummy portion 31DD. With such a configuration, it is possible to suppress a decrease in the accuracy of detection of a contact position such as a finger on the touch panel 20.

  In the present embodiment, the position of the sensing grid 33SL and the position of the drive grid 31DL in the node N are different for each node N. That is, the arrangement of the electrode lines constituting the composite lattice 30L at the node N with respect to the center of one node N differs for each node N. In such a configuration, the arrangement of the electrode lines on the entire sensing electrode surface 33S and the arrangement of the electrode lines on the entire drive electrode surface 31S can be determined as follows, for example. That is, first, a rectangular grid having a pitch that hardly causes moire is selected according to the pixel arrangement in the display panel 10 to form a composite grid 30L, and the composite grid 30L is separated into a sensing grid 33SL and a drive grid 31DL. Then, by setting the nodes N of a desired size, the virtual sensing electrode region SPK and the virtual drive electrode region DPK in these lattices 33SL and 31DL, and determining the positions of the gaps SZ and DZ, the sensing electrode surface The arrangement of the electrode lines on 33S and the drive electrode surface 31S can be determined.

  On the other hand, the position of the sensing grid 33SL and the position of the drive grid 31DL in the node N are the same in each node N, and the arrangement of the electrode lines in the entire sensing electrode surface 33S and the electrode lines in the entire drive electrode surface 31S. When the arrangement is configured by repeating the arrangement pattern of the electrode lines in one node N, the following problem occurs. That is, the rectangular grid formed by the composite grid 30L is a rectangular grid having a pitch that hardly causes moire with respect to the pixel arrangement in the display panel 10, and the arrangement of the entire electrode lines is an electrode at one node N. Fine adjustment of the size of the sensing grid pitch P1 and the drive grid pitch P2 and the size of the node N is necessary so that it can be configured by repeating the line arrangement pattern.

  Furthermore, the size of the region where the electrode lines are arranged on the sensing electrode surface 33S and the drive electrode surface 31S is the size of the region required to detect the contact position of a finger or the like in the operation surface 20S of the touch panel 20. However, the size of the region in the first direction D1 and the second direction D2 is not necessarily an integral multiple of the size of one side of the node N set as described above. Therefore, at the end portions in the first direction D1 and the second direction D2, the electrode line arrangement different from the electrode line arrangement pattern in the central portion of the sensing electrode surface 33S and the drive electrode surface 31S, that is, the repeated portion of the node N. It may be necessary to set a pattern. As described above, in the sensing electrode surface 33S and the drive electrode surface 31S, when the arrangement pattern of the electrode lines different from the central portion is adopted only at the end portion, the electrostatic formed between the sensing electrode 33SP and the drive electrode 31DP. The size of the capacity differs between the end portion and the central portion, and there may be variations in the detection accuracy of the contact position within the operation surface 20S.

  As described above, when the entire electrode line arrangement is configured by repeating the electrode line arrangement pattern in one node N, the load required for the design is large. Compared with such a configuration, in the configuration in which the arrangement of the electrode lines is different for each node N as in this embodiment, the size of the sensing grid pitch P1 and the drive grid pitch P2 and the setting of the size of the node N are set. Since the constraints are small, the load required for the design can be reduced. In addition, as a result of the restriction on the setting of the size of the node N being small, the size in the first direction D1 and the second direction D2 of the region where the electrode lines are arranged on the sensing electrode surface 33S and the drive electrode surface 31S The size of the node N can be determined so as to be an integral multiple of the size of one side of N. Therefore, it is not necessary to set an arrangement pattern of electrode lines different from the central portion only at the end portions of the sensing electrode surface 33S and the drive electrode surface 31S, so that the detection accuracy of the contact position within the operation surface 20S can be suppressed. .

  In addition, in the configuration in which the arrangement of the electrode lines is different for each node N, it is easy to set the shape of the node N to a rectangular shape different from the square, for example, as a result of less restrictions on the size of the node N.

  In the above embodiment, the transparent dielectric substrate 33 is an example of a transparent dielectric layer. The surface of the transparent dielectric substrate 33 is an example of the first surface, the back surface of the transparent dielectric substrate 33 is an example of the second surface, the sensing electrode 33SP is an example of the first electrode, and the sensing detection element 33SPa. Is an example of the first detection element, the sensing connection element 33SPb is an example of the first connection element, and the sensing grid 33SL is an example of the first grid. Moreover, the sensing dummy part 33SD is an example of a first dummy part, and the sensing dummy element 33SDa is an example of a first dummy element. The drive electrode 31DP is an example of the second electrode, the drive detection element 31DPa is an example of the second detection element, the drive connection element 31DPb is an example of the second connection element, and the drive grating 31DL is the second grating. It is an example.

As described above, according to the touch sensor electrode, the touch panel, and the display device of the present embodiment, the following effects can be obtained.
(1) In the sensing grid 33SL, each of the plurality of sensing electrodes 33SP is partitioned by a gap SZ located at a location different from the grid point 33LX. In the drive grid 31DL, each of the plurality of drive electrodes 31DP is partitioned by a gap DZ located at a location different from the grid point 31LX. According to such a configuration, compared to a configuration in which the gaps SZ and DZ are provided at the positions of the lattice points 33LX and 31LX, the missing portion is larger in the rectangular lattice lines formed by the sensing lattice 33SL and the drive lattice 31DL. It can be suppressed. Accordingly, since the gaps SZ and DZ are suppressed from being conspicuous when viewed from the direction facing the surface of the transparent dielectric substrate 33, the deterioration of the appearance quality viewed from the operation surface 20S of the touch panel 20 is suppressed, and the display device 100 is suppressed. It is also possible to prevent the electrode line pattern from becoming conspicuous due to the deterioration of the quality of the image visually recognized by the camera and the reflection of external light when the display device 100 is not turned on.

  (2) The gaps SZ and DZ are provided at locations including the midpoints of the line segments connecting the lattice points 33LX and 31LX adjacent to each other. Therefore, the length of the end portion 33SS in the sensing electrode 33SP and the length of the end portion 31DS in the drive electrode 31DP are suppressed to a length equal to or less than the composite grating pitch P3. As a result, when the electrode wires are disconnected at the end portions 33SS and 31DS, a change that occurs in the capacitance formed between the sensing electrode 33SP and the drive electrode 31DP can be suppressed to be small. It is possible to suppress a decrease in the accuracy of detecting the contact position. Further, in the configuration in which the sensing grating 33SL and the drive grating 31DL overlap with each other by the length of the composite grating pitch P3, the gap SZ overlaps with the drive electrode line 31DR when viewed from the direction facing the surface of the transparent dielectric substrate 33. In many cases, the gap DZ often overlaps the sensing electrode wire 33SR, so that the gaps SZ and DZ are further suppressed from being noticeable.

  (3) A sensing dummy portion 33SD is disposed between the sensing electrodes 33SP adjacent to each other, and forms one rectangular lattice pattern together with the sensing electrodes 33SP. Accordingly, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the pattern formed from the electrode lines arranged on the sensing electrode surface 33S is easily visible in the sensing electrode surface 33S, and the sensing is performed. It can be suppressed that the region where the electrode 33SP is located and the region where the sensing electrode 33SP is not located look different. Similarly, a drive dummy portion 31DD is disposed between the drive electrodes 31DP adjacent to each other, and forms one rectangular lattice pattern together with the drive electrodes 31DP. Therefore, when viewed from the direction facing the surface of the transparent dielectric substrate 33, the drive electrode surface 31S on which the electrode lines are arranged is easily visible. As a result, the quality of the appearance viewed from the operation surface 20S on the touch panel 20 is enhanced.

  (4) The sensing dummy part 33SD is divided into a plurality of sensing dummy elements 33SDa. For this reason, even if one of the gaps SZ between the sensing electrode 33SP and the sensing dummy portion 33SD is not precisely formed as compared with the configuration in which all the electrode wires constituting the sensing dummy portion 33SD are connected, In the sensing dummy portion 33SD, a portion electrically connected to the sensing electrode 33SP can be suppressed to a small size. Therefore, the size of the electrostatic capacitance formed between such a portion and the drive electrode 31DP can be suppressed to be small, so that it is possible to suppress the detection accuracy of the contact position such as a finger on the touch panel 20 from being lowered. The same effect can be obtained by dividing the drive dummy portion 31DD into a plurality of drive dummy elements 31DDa.

  Since these dummy elements 33SDa and 31DDa are partitioned by gaps SZ and DZ located at locations different from the lattice points 33LX and 31LX, they face the surface of the transparent dielectric substrate 33 as in (1). The gaps SZ and DZ for separating the dummy elements 33SDa and 31DDa are suppressed from being conspicuous when viewed from the direction in which they are to be performed. This also suppresses deterioration in the quality of the external appearance of the touch panel 20 as viewed from the operation surface 20S. Further, since the gaps SZ and DZ are located at a location including the midpoint of the line segment connecting the adjacent lattice points 33LX and 31LX, the same effect as in (2) can be obtained.

  (5) Seen from the direction facing the surface of the transparent dielectric substrate 33, the line formed by connecting the end portions of the sensing electrode 33SP in the sensing grid 33SL, and the drive grid 31DL Each of the lines formed by connecting the end portions of the parts constituting the drive electrode 31DP has a polygonal line shape that repeats undulations. With such a configuration, the gaps SZ and DZ located at a location including the midpoint of the line segment connecting the adjacent lattice points 33LX and 31LX, that is, the electrodes 33SP and 31DP partitioned by the gaps SZ and DZ at positions that are not easily noticeable are realized. Is done.

  (6) In the nodes N adjacent to each other along the first direction D1 or the second direction D2, the arrangement of the electrode lines constituting the sensing grid 33SL is different from each other, and the arrangement of the electrode lines constituting the drive grid 31DL is different from each other. Yes. According to such a configuration, the size of the sensing grid pitch P1 and the drive grid pitch P2 and the size of the node N are compared with the configuration in which the arrangement of the electrode lines in one node N is repeated in the nodes N adjacent to each other. Since the restrictions on the setting of the length are small, the load required for the design can be reduced.

(Modification)
The above embodiment can be implemented with the following modifications.
In each of the above embodiments, the electrode extending in the first direction D1 is the sensing electrode 33SP and the electrode extending in the second direction D2 is the drive electrode 31DP, but the sensing electrode 33SP is an electrode extending in the second direction D2. The drive electrode 31DP may be an electrode extending in the first direction D1. In this case, the back surface of the transparent dielectric substrate 33 is an example of the first surface, and the drive electrode 31DP is an example of the first electrode.

  In the above embodiment, the sensing dummy element 33SDa is configured so that the substantially octagonal region sandwiched between the four sensing detection elements 33SPa and the two sensing connection elements 33SPb is divided into two. However, the sensing dummy portion 33SD may be finely divided as the sensing dummy element 33SDa or may be roughly divided as the sensing dummy element 33SDa. For example, the octagonal region may be divided into four sensing dummy elements 33SDa so that the sensing dummy element 33SDa of the above embodiment is divided into two by a straight line extending in the first direction D1. Alternatively, the sensing dummy portion 33SD may be divided so that the octagonal region becomes one sensing dummy element 33SDa. The effect of (4) is enhanced as the sensing dummy portion 33SD is finely divided.

  Similarly, the drive dummy portion 31DD may be finely divided as the drive dummy element 31DDa than the above embodiment, or may be roughly divided. Further, the roughness of the division of the sensing dummy element 33SDa in the sensing dummy portion 33SD may be different from the roughness of the division of the drive dummy element 31DDa in the drive dummy portion 31DD.

  As shown in FIG. 10, for all lattice points 33LX included in the sensing dummy portion 33SD, two positions sandwiching the lattice point 33LX along the first intersecting direction C1 and lattice points along the second intersecting direction C2 A gap SZ may be provided between two positions sandwiching 33LX. That is, the floating portion 33LD, which is a portion made of a cross-shaped electrode line including the lattice point 33LX, is separated from the surroundings by the four gaps SZ positioned around the one lattice point 33LX. And the sensing dummy part 33SD is comprised from several floating part 33LD. According to such a configuration, the effect (4) is particularly enhanced.

  Even if all the lattice points 33LX included in the sensing dummy portion 33SD do not constitute the floating portion 33LD, the effect of the above (4) is enhanced if the sensing dummy portion 33SD includes a plurality of floating portions 33LD. I can.

  Similarly, with respect to the lattice point 31LX included in the drive dummy portion 31DD, the floating portion composed of the cross-shaped electrode line including the lattice point 31LX is separated from the periphery by the four gaps DZ located around the lattice point 31LX. It may be separated.

  In the above embodiment, the sensing dummy unit 33SD is configured by a plurality of sensing dummy elements 33SDa, but the sensing dummy unit 33SD may not be divided into such sensing dummy elements 33SDa. That is, in the sensing grid 33SL, a portion constituting one sensing dummy portion 33SD extending in the first direction D1 is not provided with a gap SZ, and a portion constituting one sensing dummy portion 33SD is a person. It may be a grid of connections.

  Similarly, the drive dummy portion 31DD may not be divided into a plurality of drive dummy elements 31DDa, and a portion constituting one drive dummy portion 31DD extending in the second direction D2 in the drive grid 31DL is a gap. It may be a single lattice without DZ.

  The positions of the gaps SZ and DZ only have to be different from the positions of the lattice points 33LX and 31LX, and may not be the positions including the midpoints of the line segments connecting the adjacent lattice points 33LX and 31LX. If the gaps SZ and DZ are located at different locations from the lattice points 33LX and 31LX, the effect (1) can be obtained.

  The positions of the gaps SZ and DZ may be arranged with regularity or may be arranged irregularly, but the arrangement with the regularity is more important than the gaps SZ and DZ. The design for the position is easy. In the configuration in which the positions of the gaps SZ and DZ are regular, the positions of the gaps SZ and DZ with respect to the line segment connecting the adjacent lattice points 33LX and 31LX are always constant, Configurations that vary are included. For example, the plurality of gaps SZ that divide the sensing electrode 33SP are arranged such that the positions of the gaps SZ with respect to the line segment that connects the adjacent lattice points 33LX are arranged at a predetermined cycle along the end of the sensing electrode 33SP. May be. As a specific example, the length obtained by dividing the sensing grid pitch P1 into 10 equals one unit, and the length from the grid point 33LX on one side of the grid line 33LX adjacent to each other to the center of the gap SZ. The length from the lattice point 33LX on the one side to the center of the gap SZ is predetermined according to the order in which the gap SZ is arranged along the end of the sensing electrode 33SP. The gap SZ may be arranged so as to be repeated in this order. Similarly, the plurality of gaps SZ separating the sensing dummy elements 33SDa are arranged such that the positions of the gaps SZ with respect to the line segment connecting the lattice points 33LX adjacent to each other are arranged at a predetermined cycle along the end of the sensing dummy element 33SDa. May be arranged.

  As shown in FIG. 11, two gaps SZ may be provided in the vicinity of the boundary between the sensing electrode 33SP and the sensing dummy portion 33SD. Specifically, the sensing grid 33SL is positioned adjacent to the gap SZa that partitions the sensing electrode 33SP and the sensing electrode line 33SR that configures the sensing grid 33SL and is different from the grid point 33LX. There may be a gap SZb. For example, as illustrated in FIG. 11, the gap SZa and the gap SZb may be equally arranged between two grid points 33LX that sandwich the grid side 33LS with respect to the grid side 33LS that intersects the virtual line K1. Alternatively, the gap SZa is arranged at a location including a midpoint of a line segment connecting two grid points 33LX that sandwich the grid side 33LS with respect to the grid side 33LS intersecting the virtual line K1, and the gap SZb You may arrange | position between the points 33LX. Alternatively, the gap SZa is arranged at a location including a midpoint of a line segment connecting two grid points 33LX sandwiching the grid side 33LS with respect to the grid side 33LS intersecting the virtual line K1, and the gap SZb is You may arrange | position in the location containing the midpoint between other lattice points 33LX which adjoins along sensing electrode line 33SR. The electrode wire piece 33SF between the gap SZa and the gap SZb belongs to the sensing dummy portion 33SD.

  According to such a configuration, even if the gap SZa is not precisely formed and the sensing electrode 33SP and the electrode wire piece 33SF are electrically connected, the sensing electrode 33SP is separated by the gap SZb, so that the sensing electrode 33SP becomes a sensing dummy. Electrical connection with most of the portion 33SD is suppressed. Therefore, the same effect as the above (4) can be obtained.

  Similarly, two gaps DZ may be provided near the boundary between the drive electrode 31DP and the drive dummy portion 31DD. Further, two gaps SZ and two gaps DZ may be provided near the boundary between the two sensing dummy elements 33SDa and also near the boundary between the two drive dummy elements 31DDa.

  Further, the number of gaps SZ and DZ between the adjacent lattice points 33LX and 31LX may be three or more, and the electrode lines 33SR and 31DR are arranged in a dotted line between the adjacent lattice points 33LX and 31LX. May be.

  The shapes of the virtual sensing detection area SPKa and the virtual sensing connection area SPKb and the shapes of the virtual drive detection area DPKa and the virtual drive connection area DPKb may be different from those in the above embodiment. For example, the virtual drive detection area DPKa may be different from the shape obtained by rotating the virtual sensing detection area SPKa by 90 °.

  That is, the shape of the sensing detection element 33SPa and the sensing connection element 33SPb, the shape of the drive detection element 31DPa and the drive connection element 31DPb, and the shape of the sensing dummy part 33SD and the drive dummy part 31DD may be different from those in the above embodiment. For example, a region occupied by the sensing dummy portion 33SD, that is, a region partitioned by two sensing electrodes 33SP adjacent to each other in the second direction D2, is a polygonal region different from the octagonal shape in the first direction D1. You may have the shape lined up along.

  In addition, the unit lattices of the sensing lattice 33SL, the drive lattice 31DL, and the composite lattice 30L are not limited to a square shape but may be a rectangular shape. The shape of the node N is not limited to a square shape, and is a rectangular shape. There may be.

  In the above embodiment, the arrangement of the electrode lines constituting the sensing grid 33SL in the node N is different for each node N, and the arrangement of the electrode lines constituting the drive grid 31DL in the node N is different for each node N. However, the arrangement of the electrode lines constituting the sensing grid 33SL in the node N and the arrangement of the electrode lines constituting the drive grid 31DL may be repeated periodically between the plurality of nodes N. For example, regarding the arrangement of the electrode lines constituting the sensing grid 33SL in the node N, two types of patterns may be alternately repeated along the second direction D2, which is the direction in which the sensing electrodes 33SP are arranged. These patterns may be repeated in a predetermined order.

  As shown in FIG. 12, the transparent substrate 31 and the transparent adhesive layer 32 may be omitted from the touch sensor electrode 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.

  As shown in FIG. 13, 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 sensing electrode surface 33S of the transparent dielectric substrate 33 is an example of the first surface. The drive electrode surface 31S of 31 is an example of 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, among the touch sensor electrodes 21, a plurality of drive electrodes 31DP are positioned on the TFT layer 13, while a plurality of sensing electrodes 33SP are positioned between the color filter substrate 16 and the upper polarizing plate 17. It can be configured as a mold. Alternatively, an on-cell configuration in which the touch sensor electrode 21 is located between the color filter substrate 16 and the upper polarizing plate 17 may be employed. In such a configuration, the layer sandwiched between the drive electrode 31DP and the sensing electrode 33SP constitutes a transparent dielectric layer.

  D1 ... first direction, D2 ... second direction, C1 ... first crossing direction, C2 ... second crossing direction, N ... node, K1, K2, K3, K4 ... virtual line, SPK ... virtual sensing electrode region, SPKa ... Virtual sensing detection area, SPKb ... Virtual sensing connection area, SDK ... Virtual sensing dummy area, SDKa ... Virtual sensing dummy element area, DPK ... Virtual drive electrode area, DPKa ... Virtual drive detection area, DPKb ... Virtual drive connection area, DDK ... Virtual drive dummy region, DDKa ... Virtual drive dummy element region, SZ, DZ ... Gap, 10 ... Display panel, 11 ... Lower polarizing plate, 12 ... Thin film transistor substrate, 13 ... TFT layer, 14 ... Liquid crystal layer, 15 ... Color filter Layer, 16 ... color filter substrate, 17 ... upper polarizing plate, 20 ... touch panel, 21 ... touch Sensor electrode, 22 ... cover layer, 23 ... transparent adhesive layer, 30L ... composite grating, 31 ... transparent substrate, 31S ... drive electrode surface, 31DP ... drive electrode, 31DPa ... drive detection element, 31DPb ... drive connection element, 31DD ... Drive dummy part, 31DDa ... drive dummy element, 31DR ... drive electrode wire, 31DS ... end part, 31DL ... drive lattice, 31LX ... lattice point, 33 ... transparent dielectric substrate, 33S ... sensing electrode surface, 33SP ... sensing electrode, 33SPa Sense sensing element 33SPb Sensing connection element 33SD Sensing dummy part 33SDa Sensing dummy element 33SR Sensing electrode wire 33SS Terminal end 33SL Sensing grid 33LX Grid point 33LD Floating part 34 ... Selection circuit, 35 Detection circuit, 36 ... controller, 100 ... display device.

Claims (14)

A transparent dielectric layer having a first surface and a second surface opposite to the first surface;
A first grating composed of a plurality of electrode lines arranged on the first surface, wherein the first grating is entirely located on one virtual rectangular grating;
A second grating composed of a plurality of electrode lines arranged on the second surface, wherein the second grating is entirely located on one virtual rectangular grating, and
The first grid is a first electrode composed of a plurality of first detection elements arranged along a first direction and a plurality of first connection elements each connecting the first detection elements adjacent to each other. Including a plurality of the first electrodes arranged along a second direction intersecting the first direction, and comprising a plurality of electrode lines extending in a direction different from the first direction and the second direction,
The second grid is a second electrode composed of a plurality of second detection elements arranged along the second direction and a plurality of second connection elements each connecting the second detection elements adjacent to each other. Including a plurality of the second electrodes arranged along the first direction, and a plurality of electrode lines extending in a direction different from the first direction and the second direction,
When viewed from the direction facing the first surface, the first grating and the second grating are combined to form a new composite grating positioned on one virtual rectangular grating,
Each of the plurality of first electrodes is partitioned by a gap in the first lattice that is located at a location different from the lattice point of the first lattice. The first lattice includes a first dummy portion disposed between the first electrodes adjacent to each other in the second direction and insulated from the first electrodes,
The touch sensor electrode according to claim 1, wherein the gap is located between the first electrode and the first dummy portion. The plurality of gaps partitioning the first electrode have regularity along the end portions of the first electrode such that the positions of the gaps with respect to line segments connecting the grid points adjacent to each other in the first grid. The electrode for a touch sensor according to claim 1, wherein the electrodes are arranged in a line. The touch sensor electrode according to any one of claims 1 to 3, wherein the gap is located at a location including a midpoint of a line segment connecting the lattice points adjacent to each other in the first lattice. The first dummy portion includes a plurality of first dummy elements arranged along the first direction, and the two first dummy elements adjacent to each other are different from the lattice points in the first lattice. The electrode for a touch sensor according to claim 2, wherein the electrodes are separated by a gap located at a position. The plurality of gaps separating the first dummy elements are such that the positions of the gaps with respect to line segments connecting the grid points adjacent to each other in the first grid are regular along the end portions of the first dummy elements. The touch sensor electrode according to claim 5, wherein the electrodes are arranged so as to be arranged. The touch according to claim 5 or 6, wherein a gap between two adjacent first dummy elements is located at a location including a midpoint of a line segment connecting the adjacent lattice points in the first lattice. Sensor electrode. 2. The line formed by connecting ends of portions constituting the first electrode in the first lattice, as viewed from the direction facing the first surface, has a polygonal line shape that repeats undulations. The electrode for touch sensors as described in any one of -7. Each of the regions in which the plurality of first electrodes are arranged on the first surface is divided equally around each of the plurality of first connection elements as a center, and each of the regions includes the first lattice. The electrode for touch sensors as described in any one of Claims 1-8 in which arrangement | positioning of the electrode line which comprises is different between the said mutually adjacent nodes. The touch sensor electrode according to claim 9, wherein the arrangement of the electrode lines constituting the first lattice in the node is periodically repeated between the plurality of nodes. In the first lattice, a portion separated from the surroundings by four gaps located around one lattice point is a floating portion,
The touch sensor electrode according to claim 2, wherein the first dummy portion includes a plurality of the floating portions. The gap is a first gap;
The first grid is a location adjacent to the first gap that defines the first electrode and the electrode line that constitutes the first grid, and is located at a location different from the grid point. The touch sensor electrode according to claim 1, wherein the touch sensor electrode has two gaps. The touch sensor electrode according to any one of claims 1 to 12,
A cover layer covering the touch sensor electrode;
A peripheral circuit that measures a capacitance between the first electrode and the second electrode. A display panel having a plurality of pixels 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 touch panel is the touch panel according to claim 13.