Member for touch sensor

Abstract

The objective of the present disclosure is to improve capacitive detection precision in a touch sensor. A member (2) for a touch sensor comprises a substrate (S1). The substrate (S1) has a first conductor layer (3), a second conductor layer (4), and an insulator layer. The first conductor layer (3) includes a plurality of receiving electrodes (31) and a plurality of first extraction lines (32). The second conductor layer (4) includes a plurality of transmitting electrodes (41) and a plurality of second extraction lines (42). A predetermined first extraction line (32) has a shield section and a coupling section. The shield section faces in a second direction toward two areas (M1) on both sides of a predetermined receiving electrode (31) joined to the predetermined first extraction line (32). The shield section extends from a second end of the coupling section to both sides in a first direction.

Description

Touch sensor materials

[0001] The present disclosure relates generally to a touch sensor member, and more particularly to a touch sensor member used in a capacitive touch sensor.

[0002] Patent Document 1 discloses a sheet-like conductor used in a touch panel (touch sensor). The sheet-like conductor includes an insulator, a first detection electrode, and a second detection electrode. The first detection electrode is disposed on one surface of the insulator. The second detection electrode is disposed on the other surface of the insulator. The first detection electrode and the second detection electrode are configured in a mesh shape using thin metal wires.

[0003] JP 2015-191560 A

[0004] An object of the present disclosure is to provide a touch sensor member that can improve the detection accuracy of electrostatic capacitance in a touch sensor.

[0005] A touch sensor member according to one aspect of the present disclosure is used in a capacitive touch sensor. The touch sensor member includes a substrate. The substrate has a first conductor layer, a second conductor layer, and an insulating layer. The insulating layer is provided between the first conductor layer and the second conductor layer. The insulating layer has electrical insulation properties. The first conductor layer includes a plurality of receiving electrodes and a plurality of first escape wirings. The plurality of receiving electrodes are arranged in a first region when viewed from a thickness direction of the substrate. The plurality of receiving electrodes are aligned in a first direction perpendicular to the thickness direction. The plurality of first escape wirings are connected to the plurality of receiving electrodes. The second conductor layer includes a plurality of transmitting electrodes and a plurality of second escape wirings. The plurality of transmitting electrodes are arranged in the first region when viewed from the thickness direction. The plurality of transmitting electrodes are aligned in a second direction. The second direction is perpendicular to both the thickness direction and the first direction. The plurality of second escape wirings are connected to the plurality of transmitting electrodes. Each of the plurality of receiving electrodes has a linear shape extending along the second direction. Each of the plurality of transmitting electrodes has a linear shape extending along the first direction. When viewed from the thickness direction, each of the plurality of first outgoing wirings is provided from a first peripheral portion of the first region to a second peripheral portion of the second region. The second region is aligned in the second direction relative to the first region. Among the plurality of receiving electrodes, there is an area between any two adjacent receiving electrodes in the first direction. A predetermined first outgoing wiring among the plurality of first outgoing wirings has a shield portion and a connecting portion. The shield portion faces, in the second direction, two areas on both sides of a predetermined receiving electrode connected to the predetermined first outgoing wiring. The connecting portion has a first end connected to the predetermined receiving electrode and a second end connected to the shield portion. The shield portion extends from the second end of the connecting portion to both sides in the first direction.

[0006] FIG. 1 is a plan view of a touch sensor member according to a first embodiment. FIG. 2 is a cross-sectional view of the touch sensor member according to the same. FIG. 3 is a plan view of a portion of the touch sensor member according to the same. FIG. 4 is a plan view of a portion of a first conductor layer of the touch sensor member according to the same. FIG. 5 is a plan view of a portion of a second conductor layer of the touch sensor member according to the same. FIG. 6 is an enlarged view of a receiving electrode of the same. FIG. 7 is an enlarged view of a second ground conductor and a third ground conductor of the same. FIG. 8 is a plan view of a portion of the same touch sensor member. FIG. 9 is a plan view of a portion of a touch sensor member according to a second embodiment. FIG. 10 is a plan view of a portion of a second conductor layer of the same touch sensor member. FIG. 11 is a plan view of a portion of a touch sensor member according to a third embodiment. FIG. 12 is a plan view of a portion of a touch sensor member according to a fourth embodiment. FIG. 13 is a plan view of a portion of a touch sensor member according to a fifth embodiment. FIG. 14 is a cross-sectional view of a touch sensor member according to a modified example.

[0007] In the following embodiments, the touch sensor member of the present disclosure will be described with reference to the drawings. However, the following embodiments are merely a portion of various embodiments of the present disclosure. The following embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Furthermore, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios. Furthermore, although directions may be mentioned in the description, this is not intended to limit the direction in which the touch sensor member is used.

[0008] (Embodiment 1) (1) Overview of Touch Sensor Hereinafter, the X-axis direction, the Y-axis direction, and the Z-axis direction are defined as shown in FIGS. 1 and 2 . The X-axis direction is a direction along the longitudinal direction of the transmission electrodes 41 of the touch sensor member 2. The Y-axis direction is a direction perpendicular to the X-axis direction and along the longitudinal direction of the reception electrodes 31 of the touch sensor member 2. The Z-axis direction is a direction perpendicular to both the X-axis direction and the Y-axis direction. Note that the X-axis, Y-axis, and Z-axis in FIGS. 1 and 2 are merely shown for the purpose of explanation and do not have any substance.

[0009] As shown in FIGS. 1 and 2 , the touch sensor 1 includes, for example, a touch sensor member 2 , a cover member 11 , and an outer wiring portion 12 .

[0010] The cover member 11 is translucent and is made of, for example, glass or synthetic resin, and has a plate-like shape.

[0011] When viewed from the Z-axis direction, the cover member 11 and the touch sensor member 2 each have a rectangular shape, for example. When viewed from the Z-axis direction, the outer edge of the cover member 11 is located outside the outer edge of the touch sensor member 2. The cover member 11 and the touch sensor member 2 are aligned in the Z-axis direction. The cover member 11 and the touch sensor member 2 are bonded together by a transparent adhesive layer. The cover member 11 covers the touch sensor member 2.

[0012] The outer wiring portion 12 is, for example, a flexible substrate. The outer wiring portion 12 includes wiring. The wiring of the outer wiring portion 12 is electrically connected to the wiring of the touch sensor member 2. The outer wiring portion 12 electrically connects the touch sensor member 2 to a power source that applies a drive voltage to the multiple transmission electrodes 41 of the touch sensor member 2. In addition, the outer wiring portion 12 outputs a signal corresponding to a change in electrostatic capacitance detected by the touch sensor member 2 to an external device.

[0013] The touch sensor 1 is used as an input device for equipment (for example, an in-vehicle device such as a car navigation system, a display device for a personal computer, a mobile phone, a personal digital assistant, a portable game machine, a copy machine, a ticket machine, an automated teller machine, or a watch, etc.).

[0014] The touch sensor 1 is used in combination with an image display device such as a liquid crystal display or an organic electroluminescence display. The touch sensor 1 includes a first region R1, and the touch sensor 1 is configured to be translucent in the first region R1. More specifically, the first region R1 overlaps a portion of the cover member 11, and the portion of the cover member 11 that overlaps with the first region R1 is configured to be translucent. The portion of the cover member 11 outside the first region R1 is configured to be non-transmittable by decoration (for example, painting or coloring).

[0015] The user can obtain visual information from the image display device arranged behind the touch sensor 1 via the first region R1. When the user performs a touch operation on the first region R1 of the front surface of the cover member 11, the touch sensor 1 detects the touch operation. In other words, the first region R1 is the touch area where the touch operation is performed. The front surface of the cover member 11 is an operation surface 110 that comes into contact with an indicator (e.g., a user's fingertip, a stylus, a conductive object such as a pointer stick) in response to a touch operation.

[0016] The touch sensor 1 detects capacitance using a mutual capacitance method. That is, a drive voltage is applied to the multiple transmission electrodes 41 of the touch sensor 1, and when a pointer touches the operation surface 110, the touch sensor 1 detects a change in capacitance between the transmission electrodes 41 and the reception electrodes 31 provided near the contact point.

[0017] (2) Overview of Touch Sensor Member As shown in Fig. 1 , a touch sensor member 2 of this embodiment is used in a capacitive touch sensor 1. The touch sensor member 2 includes a substrate S1. As shown in Figs. 1 and 2 , the substrate S1 has a first conductor layer 3, a second conductor layer 4, and an insulating layer 51. The insulating layer 51 is provided between the first conductor layer 3 and the second conductor layer 4. The insulating layer 51 has electrical insulation properties.

[0018] The first conductor layer 3 includes a plurality of receiving electrodes 31 and a plurality of first escape wirings 32. The plurality of receiving electrodes 31 are arranged in a first region R1 when viewed from the thickness direction (Z-axis direction) of the substrate S1. A light-transmitting region of the cover member 11 coincides with the first region R1. The plurality of receiving electrodes 31 are arranged in a first direction (X-axis direction) perpendicular to the thickness direction. The plurality of first escape wirings 32 are connected to the plurality of receiving electrodes 31.

[0019] The second conductor layer 4 includes a plurality of transmission electrodes 41 and a plurality of second escape wirings 42. The plurality of transmission electrodes 41 are arranged in a first region R1 when viewed from the thickness direction. The plurality of transmission electrodes 41 are aligned in a second direction (Y-axis direction). The second direction is orthogonal to both the thickness direction and the first direction. The plurality of second escape wirings 42 are connected to the plurality of transmission electrodes 41.

[0020] Each of the plurality of receiving electrodes 31 has a linear shape extending along the second direction, and each of the plurality of transmitting electrodes 41 has a linear shape extending along the first direction.

[0021] When viewed from the thickness direction, each of the multiple first escape wirings 32 extends from a first peripheral portion of the first region R1 to a second peripheral portion of the second region R2. The second region R2 is aligned in the second direction relative to the first region R1. An area M1 is located between any two adjacent receiving electrodes 31 among the multiple receiving electrodes 31 in the first direction. A specific first escape wiring 32 among the multiple first escape wirings 32 has a shield portion 321 (see FIG. 4 ) and a connecting portion 322 (see FIG. 4 ). The shield portion 321 faces, in the second direction, two areas M1 on both sides of the specific receiving electrode 31 connected to the specific first escape wiring 32. The connecting portion 322 has a first end t1 (see FIG. 4 ) connected to the specific receiving electrode 31 and a second end t2 (see FIG. 4 ) connected to the shield portion 321. The shield portion 321 extends to both sides in the first direction from the second end t2 of the connecting portion 322. In other words, the shield portion 321 extends from the second end t2 to the positive side and the negative side of the X-axis.

[0022] According to the touch sensor member 2 of this embodiment, the electric field generated from a portion of the transmission electrode 41 is absorbed and suppressed by the shield portion 321 of a predetermined first escape wiring 32, thereby reducing the possibility that the electric field generated from the portion will be transmitted as noise to another first escape wiring 32 adjacent to the predetermined first escape wiring 32. In other words, it is possible to control which wiring the noise will be transmitted to. This improves the detection accuracy of the capacitance in the touch sensor 1.

[0023] In this embodiment, all of the first escape routings 32 have the shield portion 321 and the connecting portion 322. That is, all of the first escape routings 32 correspond to the predetermined first escape routings 32 having the shield portion 321 and the connecting portion 322. Therefore, among the multiple receiving electrodes 31, each of two or more (ten in FIG. 1 ) first escape routings 32 connected to two or more (ten in FIG. 1 ) receiving electrodes 31 located between two receiving electrodes 31 a, 31 b (see FIG. 1 ) arranged at both ends in the X-axis direction (first direction) corresponds to the predetermined first escape routing 32. Furthermore, each of the two first escape routings 32 a, 32 b connected to the two receiving electrodes 31 a, 31 b also corresponds to the predetermined first escape routing 32.

[0024] (3) Layer Structure of Substrate The touch sensor member 2 will be described in more detail below.

[0025] As described above, the touch sensor member 2 includes the substrate S1. The substrate S1 is a double-sided substrate. As shown in FIG. 2 , the substrate S1 has a first conductor layer 3, a second conductor layer 4, and a base material 5.

[0026] The base material 5 has electrical insulation properties. The base material 5 includes, for example, a film made of PET (polyethylene terephthalate) resin and electrically insulating resin films formed on both sides of the film. The base material 5 also has light-transmitting properties.

[0027] A groove 501 is provided in the resin film on the front surface of the base material 5. The first conductor layer 3 is embedded in the groove 501.

[0028] A groove 502 is provided in the resin film on the rear surface of the base material 5. The second conductor layer 4 is embedded in the groove 502.

[0029] The base material 5 includes an insulating layer 51 , and the portion of the base material 5 between the first conductor layer 3 and the second conductor layer 4 forms the insulating layer 51 .

[0030] (4) First Conductive Layer and Second Conductive Layer The first conductor layer 3 and the second conductor layer 4 are each formed of a conductive material such as copper.

[0031] In Fig. 3, the first conductor layer 3 is shown by a solid line, and the second conductor layer 4 is shown by a dashed line. Fig. 4 shows only the first conductor layer 3 in the same range as that shown in Fig. 3. Fig. 5 shows only the second conductor layer 4 in the same range as that shown in Fig. 3.

[0032] (5) First Conductor Layer As shown in FIGS. 1, 3, and 4, the first conductor layer 3 includes a plurality of receiving electrodes 31, a plurality of first escape wirings 32, a plurality of terminal portions 33, a plurality of ground conductors 34 (two in this embodiment, although only one is shown in FIG. 4), and a plurality of ground wirings 35 (two in this embodiment, as shown in FIG. 1).

[0033] The plurality of receiving electrodes 31 are arranged in a first region R1. The first region R1 is an area overlapping with a part of the cover member 11.

[0034] Each of the multiple receiving electrodes 31 has a linear shape extending along the Y-axis direction. More specifically, each receiving electrode 31 is shaped to fit within a rectangular imaginary frame (the imaginary frame is not an actual component) whose longitudinal direction is in the Y-axis direction. The receiving electrodes 31 inside the imaginary frame have a mesh-like shape, as shown in FIG. 6 . In other words, each receiving electrode 31 is a double line.

[0035] More specifically, the receiving electrode 31 includes a plurality of intersecting lines 311 and collector wires 312. Some of the intersecting lines 311 are a plurality of first intersecting lines arranged parallel to one another along a predetermined direction, and the remaining intersecting lines 311 are a plurality of second intersecting lines arranged parallel to one another along a direction different from the predetermined direction. The first intersecting lines intersect with the second intersecting lines. This gives the receiving electrode 31 a mesh-like structure. More specifically, the first intersecting lines and the second intersecting lines intersect to form an X-shape, and the receiving electrode 31 has an X-shaped mesh shape as a whole.

[0036] The current collector wire 312 is a wiring for collecting current. The current collector wire 312 is arranged on one of two short sides of a rectangular imaginary frame that surrounds the multiple intersection lines 311. The current collector wire 312 is connected to the coupling portion 322 of the first escape wiring 32.

[0037] The width (thickness) of the collector wire 312 is larger than the width (thickness) of the intersecting line 311. For example, the width of the collector wire 312 is 6 to 10 μm, and the width of the intersecting line 311 is 1 to 5 μm. The width (thickness) of the first escape routing 32 is larger than the width (thickness) of the intersecting line 311. For example, the width of the first escape routing 32 is 6 to 10 μm.

[0038] As shown in Fig. 1 , the multiple first escape wirings 32 correspond one-to-one to the multiple receiving electrodes 31. Each first escape wiring 32 is connected to a corresponding receiving electrode 31. Furthermore, the multiple (12) first escape wirings 32 correspond one-to-one to the same number (12) of terminal portions 33 as the number of the first escape wirings 32 among the multiple terminal portions 33. Each first escape wiring 32 is connected to a corresponding terminal portion 33. A region in which the multiple terminal portions 33 (14 in Fig. 1 ) are provided is defined as a second region R2.

[0039] Each of the first escape routings 32 is a single wire. The first escape routings 32 are electrically insulated from one another. That is, the first escape routings 32 are provided so as not to be connected to one another.

[0040] As shown in FIG. 4 , each of the first escape routings 32 includes a shield portion 321 , a connecting portion 322 , and a wiring portion 323 .

[0041] A first end of the wiring portion 323 is connected to the terminal portion 33. A second end of the wiring portion 323 is connected to the shield portion 321. In other words, the wiring portion 323 connects the terminal portion 33 and the shield portion 321 together.

[0042] A first end t1 of the connecting portion 322 is connected to the receiving electrode 31. A second end t2 of the connecting portion 322 is connected to the shield portion 321. In other words, the connecting portion 322 connects the receiving electrode 31 and the shield portion 321. The shape of the connecting portion 322 is linear along the Y-axis direction (second direction).

[0043] The shield part 321 includes a first part 3210 and a second part 3211. The first part 3210 extends from the second end t2 of the connecting part 322 along the X-axis direction toward the second region R2 (in FIG. 4, the negative direction of the X-axis). The second part 3211 extends from the second end t2 of the connecting part 322 along the X-axis direction toward a side away from the second region R2 (in FIG. 4, the positive direction of the X-axis). The first part 3210 and the second part 3211 are each linear. The first part 3210 and the second part 3211 join together to form a straight line along the X-axis direction. One end of the first part 3210 is connected to the wiring part 323.

[0044] The length of each of the first portion 3210 and the second portion 3211 is set according to the spacing between the multiple receiving electrodes 31 (the length of the area M1 in the X-axis direction). When focusing on a certain receiving electrode 31, it is assumed that one of the two areas M1 on either side of the receiving electrode 31 is equally divided by a first line along the Y-axis direction, and the other area M1 is equally divided by a second line along the Y-axis direction. This defines the distance L1 between the first line and the second line. The length of the area M1 in the X-axis direction is then defined as distance L1.

[0045] The plurality of receiving electrodes 31 are arranged at equal intervals. Therefore, the distance L1 between any two adjacent receiving electrodes 31 is constant.

[0046] The length in the X-axis direction (first direction) of the portion of the shield part 321 between the second end t2 of the connecting portion 322 and the tip of the shield part 321 (first portion 3210 or second portion 3211) is preferably 25% or more of the length in the X-axis direction (first direction) of the area M1 facing the above portion in the Y-axis direction (second direction). That is, the length L2 in the X-axis direction of the first portion 3210 is preferably 25% or more of the distance L1. Furthermore, the length L3 in the X-axis direction of the second portion 3211 is preferably 25% or more of the distance L1. In this embodiment, the lengths L2 and L3 are each 40% or more of the distance L1.

[0047] As described above, the region in which multiple terminal portions 33 (14 in FIG. 1 ) are provided is defined as the second region R2. The second region R2 is located on one long side of the rectangular front surface of the base material 5. The second region R2 is located at the center of that long side. The terminal portions 33 are electrically connected to wiring external to the substrate S1. For example, as shown in FIG. 1 , the outer wiring portion 12 is attached to the substrate S1, and the terminal portions 33 are electrically connected to the wiring of the outer wiring portion 12. The terminal portions 33 are, for example, pad electrodes. The terminal portions 33 may include screw terminals, connectors, or the like.

[0048] As shown in FIG. 1 , some of the multiple first escape wirings 32 extend from the second peripheral portion of the second region R2 to the positive side of the X-axis. The remaining first escape wirings 32 extend from the second peripheral portion of the second region R2 to the negative side of the X-axis. When the substrate S1 is divided into two equal parts in a plan view by a line along the Y-axis direction, the region on the positive side of the X-axis will be referred to as the "right region" below, and the region on the negative side of the X-axis will be referred to as the "left region" below. The first conductor layer 3 is formed so that the right region and the left region are line-symmetrical.

[0049] The ground wiring 35 is a single wire. The multiple (two) ground wirings 35 correspond one-to-one to the same number (two) of terminal portions 33 as the number of ground wirings 35 among the multiple terminal portions 33. A first end of each ground wiring 35 is connected to the corresponding terminal portion 33. Furthermore, the multiple (two) ground wirings 35 correspond one-to-one to the multiple (two) ground conductors 34. A second end of each ground wiring 35 is connected to the corresponding ground conductor 34. In other words, the ground wiring 35 connects the terminal portion 33 and the ground conductor 34.

[0050] One of the two ground wirings 35 extends from the second peripheral portion of the second region R2 to the positive side of the X axis (the right region), and the other ground wiring 35 extends from the second peripheral portion of the second region R2 to the negative side of the X axis (the left region).

[0051] One of the two ground conductors 34 is arranged in the right region, and the other ground conductor 34 is arranged in the left region. Fig. 4 illustrates the ground conductor 34 arranged in the right region.

[0052] The ground conductor 34 is arranged near the plurality of first escape wirings 32. At least some of the plurality of first escape wirings 32 are arranged between the ground conductor 34 and a region (first region R1) in which the plurality of receiving electrodes 31 are arranged. The ground conductor 34 is, for example, a ladder wiring. The ladder wiring will be described later. The ground conductor 34 may also be a solid wiring (solid ground).

[0053] (6) Second Conductor Layer As shown in FIGS. 1 , 3 , and 5 , the second conductor layer 4 includes a plurality of transmitting electrodes 41, a plurality of second escape wirings 42, a plurality of terminal portions 43, a plurality of (two in this embodiment, although only one is illustrated in FIG. 5 ) second ground conductors 44, a plurality of (two in this embodiment, although only one is illustrated in FIG. 5 ) third ground conductors 45, a plurality of (two in this embodiment, as illustrated in FIG. 1 ) ground conductors 46, and a plurality of (two in this embodiment, as illustrated in FIG. 1 ) ground wirings 47.

[0054] The plurality of transmitting electrodes 41 are arranged in a first region R1. The first region R1 is an area overlapping with a part of the cover member 11.

[0055] Each of the multiple transmitting electrodes 41 has a linear shape extending along the X-axis direction. More specifically, each transmitting electrode 41 is shaped to fit within a rectangular imaginary frame (the imaginary frame is not an actual component) whose longitudinal direction is in the X-axis direction. The shape of each transmitting electrode 41 inside the imaginary frame is mesh-like, similar to the receiving electrode 31 (see FIG. 6 ). In other words, each transmitting electrode 41 is a double wire. Just as the receiving electrode 31 has multiple intersecting lines 311 and collector lines 312, each transmitting electrode 41 also has multiple intersecting lines and collector lines, and the collector lines of the transmitting electrode 41 are connected to the second escape wiring 42. Since the shape of each transmitting electrode 41 is similar to that of the receiving electrode 31, detailed description thereof will be omitted.

[0056] 3, for convenience, the transmitting electrode 41 is illustrated by a rectangular dashed line, although the actual shape of the transmitting electrode 41 is shown in FIG.

[0057] 1 , the plurality of second escape wirings 42 correspond one-to-one to the plurality of transmission electrodes 41. Each second escape wiring 42 is connected to (the collector wire of) the corresponding transmission electrode 41. Furthermore, the plurality (eight) second escape wirings 42 correspond one-to-one to the same number (eight) of terminal portions 43 as the number of second escape wirings 42 among the plurality of terminal portions 43. Each second escape wiring 42 is connected to the corresponding terminal portion 43.

[0058] Each of the second escape wirings 42 is a single wire. The second escape wirings 42 are electrically insulated from one another. That is, the second escape wirings 42 are provided so as not to be connected to one another.

[0059] Half of the multiple (12 in FIG. 1 ) terminal portions 43 are provided on the positive side of the X axis (right side region) with respect to the second region R2. The remaining half of the multiple terminal portions 43 are provided on the negative side of the X axis (left side region) with respect to the second region R2. The terminal portions 43 are electrically connected to wiring external to the substrate S1. For example, as shown in FIG. 1 , an outer wiring portion 12 is attached to the substrate S1, and the terminal portions 43 are electrically connected to the wiring of the outer wiring portion 12. The terminal portions 43 are, for example, pad electrodes. The terminal portions 43 may include screw terminals, connectors, or the like.

[0060] The second escape wiring 42 extends from the terminal 43 provided in the right region toward the positive side of the X axis, and the second escape wiring 42 extends from the terminal 43 provided in the left region toward the negative side of the X axis.

[0061] The ground wiring 47 is a single wire. The multiple (two) ground wirings 47 correspond one-to-one to the same number (two) of terminals 43 as the number of ground wirings 47 among the multiple terminals 43. A first end of each ground wiring 47 is connected to a corresponding terminal 43. The multiple (two) ground wirings 47 also correspond one-to-one to the multiple (two) second ground conductors 44. A second end of each ground wiring 47 is connected to a corresponding second ground conductor 44. In other words, the ground wiring 47 connects the terminal 43 and the second ground conductor 44.

[0062] One of the two ground wirings 47 extends from the terminal portion 43 to the positive side of the X axis (the right region), and the other ground wiring 47 extends from the terminal portion 43 to the negative side of the X axis (the left region).

[0063] One of the two second ground conductors 44 is located in the right region, and the other second ground conductor 44 is located in the left region. Fig. 5 illustrates the second ground conductor 44 located in the right region.

[0064] One of the two third ground conductors 45 is arranged in the right region, and the other third ground conductor 45 is arranged in the left region. Fig. 5 illustrates the third ground conductor 45 arranged in the right region.

[0065] 3 and 5 , the second ground conductor 44 is disposed in a position overlapping with the plurality of first escape wirings 32. The third ground conductor 45 is connected to the second ground conductor 44. The second ground conductor 44 is disposed between the third ground conductor 45 and a region (first region R1) in which the plurality of transmission electrodes 41 are disposed. The second ground conductor 44 and the third ground conductor 45 are disposed between portions of the plurality of second escape wirings 42 along the X-axis direction and the first region R1.

[0066] The second ground conductor 44 has, for example, a mesh shape. The third ground conductor 45 has, for example, a ladder wiring. The shapes of the second ground conductor 44 and the third ground conductor 45 will be described below with reference to FIG. 7 .

[0067] The second ground conductor 44 is a double-wire. The second ground conductor 44 includes multiple intersecting lines 441. The multiple intersecting lines 441 are shaped to fit within a rectangular imaginary frame (the imaginary frame is not an actual component). Some of the multiple intersecting lines 441 are third intersecting lines that are arranged parallel to each other along a predetermined direction, and the remaining multiple intersecting lines 441 are fourth intersecting lines that are arranged parallel to each other along a direction different from the predetermined direction. The third intersecting lines intersect with the fourth intersecting lines. This gives the second ground conductor 44 a mesh-like structure. More specifically, the third intersecting lines and the fourth intersecting lines intersect to form an X-shape, giving the second ground conductor 44 an X-shaped mesh-like shape overall.

[0068] The third ground conductor 45 is a double wire. The third ground conductor 45 includes multiple parallel wires 451 and multiple bridging wires 452. Each of the multiple parallel wires 451 is linear. The multiple parallel wires 451 are arranged in parallel to each other. Two adjacent parallel wires 451 are connected to each other via two or more bridging wires 452. The structure consisting of the two adjacent parallel wires 451 and the two or more bridging wires 452 that bridge between the two parallel wires 451 forms a ladder shape. The third ground conductor 45 is a ladder wiring structure in which multiple ladder-shaped structures made up of the above-mentioned multiple wires are arranged in parallel and connected to each other.

[0069] The third ground conductor 45 also has a mesh-like shape. An area surrounded by two adjacent parallel wires 451 and two bridging wires 452 that bridge between the two parallel wires 451 corresponds to one mesh.

[0070] The mesh size of the third ground conductor 45 is smaller than that of the second ground conductor 44. Therefore, the density of the third ground conductor 45 is greater than that of the second ground conductor 44. When the conductor is a double track, the density of the conductor is the ratio of the area A2 of the double track itself to the sum of the area A1 of the gaps (mesh) between the double tracks and the area A2 of the double track itself. In other words, (density) = A2 / (A1 + A2). When the conductor is a solid wire or a solid wiring, the density is 1.

[0071] The mesh size of the third ground conductor 45 is smaller than the mesh size of the multiple receiving electrodes 31 (see FIG. 6 ). Therefore, the density of the third ground conductor 45 is greater than the density of each of the multiple receiving electrodes 31.

[0072] Similarly to the receiving electrodes 31, the transmitting electrodes 41 also have a mesh-like shape, and the mesh size of the third ground conductor 45 is smaller than the mesh size of the transmitting electrodes 41. Therefore, the density of the third ground conductor 45 is greater than the density of each of the transmitting electrodes 41.

[0073] The third ground conductor 45 may be a solid wiring (ground solid) instead of a ladder wiring.

[0074] As shown in FIGS. 3 and 5 , the second ground conductor 44 is disposed at a position overlapping the plurality of first escape wires 32. The second ground conductor 44 has a mesh-like shape. Furthermore, the insulating layer 51 (see FIG. 2 ) is translucent. Therefore, a camera can capture an image of the plurality of first escape wires 32 through the second ground conductor 44. Therefore, by viewing the image captured by the camera, a worker or the like can visually recognize the plurality of first escape wires 32 through the second ground conductor 44. In other words, a worker or the like can visually recognize the plurality of first escape wires 32 through the mesh (gaps) provided in the second ground conductor 44. This facilitates visual inspection of the touch sensor member 2 during the manufacturing process.

[0075] 1 , the multiple (two) ground conductors 46 are arranged outside the double-wire second escape routing 42 and the first region R1. The multiple-wire ground conductors 46 are provided so as to surround the double-wire second escape routing 42 and the first region R1. Each of the multiple ground conductors 46 is, for example, a solid wiring or a ladder wiring.

[0076] (7) Issues with the Comparative Example Next, issues with the touch sensor 1 of the comparative example will be described. There may be several differences between the touch sensor 1 of the comparative example and the touch sensor 1 of the present embodiment. At least, the touch sensor 1 of the comparative example differs from the touch sensor 1 of the present embodiment in that it does not have the shield portion 321 extending from the second end t2 (see FIG. 4 ) of the connecting portion 322 to both sides in the X-axis direction.

[0077] When a pointer such as a user's fingertip is not in contact with the operation surface 110 of the touch sensor 1, certain combinations of receiving electrodes 31 and transmitting electrodes 41 may result in a larger capacitance between the receiving electrodes 31 and transmitting electrodes 41 than other combinations. For example, the multiple receiving electrodes 31 will be referred to as the first to twelfth receiving electrodes, and the multiple transmitting electrodes 41 will be referred to as the first to eighth transmitting electrodes. When a pointer is not in contact with the operation surface 110, the capacitance between the first receiving electrode and the first transmitting electrode may be larger than the capacitance between the Nth receiving electrode and the Mth transmitting electrode. Here, N = 1 to 12, M = 1 to 8, excluding the combination N = M = 1.

[0078] If the capacitance is locally large, it may have a negative effect on the accuracy of capacitance detection.

[0079] There are two main reasons why the capacitance increases locally. The first reason is that the electric field generated from the transmission electrode 41 is carried as noise on the first escape wiring 32. This may increase the capacitance between the transmission electrode 41 a (see FIG. 1 ), which is the closest to the first escape wiring 32 among the multiple transmission electrodes 41, and each of the multiple reception electrodes 31.

[0080] The second cause is that the first escape wiring 32 is routed along the second escape wiring 42, and an electric field generated from the second escape wiring 42 is carried as noise on the first escape wiring 32. As a result, in a specific combination of the receiving electrode 31 and the transmitting electrode 41, the capacitance between the receiving electrode 31 and the transmitting electrode 41 may be larger than in other combinations. For example, the first escape wiring 32a in FIG. 1 is routed along at least one second escape wiring 42 in the left region. Therefore, the capacitance between the receiving electrode 31a and at least one transmitting electrode 41 may be larger.

[0081] In this way, in the touch sensor 1 of the comparative example, when a pointer is not in contact with the operation surface 110, the capacitance may increase locally. This may result in a problem of reduced capacitance detection accuracy. For example, in the area where the capacitance increases locally, the ratio between the maximum and minimum detectable capacitance values ​​(dynamic range) may decrease.

[0082] (8) Function of the Shield Section Therefore, the touch sensor 1 of this embodiment is provided with a shield section 321 extending from the second end t2 (see FIG. 4 ) of the connecting section 322 toward both the positive and negative sides of the X-axis direction. The electric field generated from a portion of the transmitting electrode 41 is absorbed and suppressed by the shield section 321 facing the portion. For example, in FIG. 1 , the electric field generated from a portion of the transmitting electrode 41 near the receiving electrode 31a is absorbed and suppressed by the shield section 321 of the first escape wiring 32a. This reduces the possibility that the electric field will be transmitted as noise to other first escape wirings 32. In other words, it is possible to control which wiring the noise will be transmitted to. This improves the capacitance detection accuracy of the touch sensor 1. Similarly, the electric field generated from a portion of the transmitting electrode 41 near the receiving electrode 31b is absorbed and suppressed by the shield section 321 of the first escape wiring 32b.

[0083] Furthermore, in this embodiment, each of the multiple first escape wirings 32 has a shield portion 321. Therefore, the influence of the electric field (noise) generated from the transmission electrode 41 can be distributed to the multiple first escape wirings 32. In other words, an electric field generated from a portion of the transmission electrode 41 with a length equivalent to the distance L1 (see FIG. 4 ) is carried as noise on one first escape wiring 32. This reduces the possibility of noise concentrating on some of the first escape wirings 32. This further improves the capacitance detection accuracy of the touch sensor 1.

[0084] (9) Distance between the first and second escape wirings Next, a description will be given with reference to FIG. 8 . FIG. 8 shows a portion of the right region. The ground conductor 34, the second ground conductor 44, and the third ground conductor 45 are not shown in FIG. 8 . For convenience, the receiving electrode 31 is illustrated by a rectangular dashed line in FIG. 4 . However, the actual shape of the receiving electrode 31 is as shown in FIG. 4 .

[0085] The second conductor layer 4 includes a partial region R3. In the partial region R3, a portion of each of two or more of the second escape wirings 42 is provided along the X-axis direction (first direction). The boundary of the partial region R3 on the side of the multiple receiving electrodes 31 overlaps with the outer edge of the second escape wiring 42 a that is closest to the multiple receiving electrodes 31, among the two or more second escape wirings 42.

[0086] When viewed in the Z-axis direction (thickness direction of the substrate S1), the first escape routings 32 are provided between the first region R1 and the partial region R3.

[0087] When viewed from the Z-axis direction (thickness direction of the substrate S1), the distance in the Y-axis direction (second direction) between the set of multiple first escape routings 32 and the partial region R3 is longer as the position of the object of distance measurement is farther from the second region R2 (see FIG. 1) in the X-axis direction (first direction). In the right region shown in FIG. 8, "farther from the second region R2 in the X-axis direction" means, in other words, "farther to the positive side of the X-axis."

[0088] As shown in FIG. 8 , the shape of the multiple second escape wirings 42 in the partial region R3 is linear along the X-axis direction. Furthermore, the multiple first escape wirings 32 extend more toward the positive Y-axis direction as they move toward the positive X-axis direction. In other words, the multiple first escape wirings 32 extend farther away from the partial region R3 as they move toward the positive X-axis direction. More specifically, the distance from the partial region R3 of each first escape wiring 32 changes at a position facing an area M1 between the receiving electrodes 31. At other positions, the shape of each first escape wiring 32 is linear along the X-axis direction. As a result, the distance in the Y-axis direction (second direction) between the set of multiple first escape wirings 32 and the partial region R3 changes stepwise. In FIG. 8 , the distance changes from L3 to L4, L5, and L6 as they move toward the positive X-axis direction. Here, L3<L4<L5<L6.

[0089] The distance between the set of the multiple first escape routing 32 and the partial region R3 corresponds to the distance between the first escape routing 32 and the second escape routing 42. The longer the distance between the first escape routing 32 and the second escape routing 42, the smaller the electrostatic capacitance of the capacitive coupling between the first escape routing 32 and the second escape routing 42.

[0090] Generally, as the distance (wiring length) from the second region R2 increases, the distance over which the first escape wiring 32 and the second escape wiring 42 run side by side increases, which tends to increase the capacitance of the capacitive coupling between the first escape wiring 32 and the second escape wiring 42. Therefore, in this embodiment, the distance between the first escape wiring 32 and the second escape wiring 42 is increased the farther from the second region R2 the position is, thereby reducing the capacitance of the capacitive coupling. In other words, the bias in the capacitance of the capacitive coupling is reduced. This can further improve the detection accuracy of the capacitance in the touch sensor 1.

[0091] Second Embodiment Next, a touch sensor member 2A according to a second embodiment will be described with reference to Fig. 9 and Fig. 10. The same components as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

[0092] In Fig. 9, the first conductor layer 3 is shown by a dashed line, and the second conductor layer 4 is shown by a solid line. Fig. 10 shows only the second conductor layer 4 in the same range as that shown in Fig. 9. The configuration of the first conductor layer 3 is the same as that of the first embodiment (see Fig. 4).

[0093] The second conductor layer 4 of the present embodiment further includes a first ground conductor 48. The first ground conductor 48 is located between the first region R1 and the first escape wirings 32 when viewed in the thickness direction of the substrate S1, and is positioned opposite the area M1 in the Y-axis direction (second direction). Therefore, the electric field generated from the transmitting electrode 41 can be absorbed and suppressed by the first ground conductor 48.

[0094] More specifically, the first ground conductor 48 is provided at a position facing, in the Y-axis direction (second direction), the shield portion 321 of a predetermined first escape routing 32 that includes the shield portion 321 and the coupling portion 322. That is, the first ground conductor 48 is provided between the first region R1 and the shield portion 321. In this embodiment, all of the first escape routings 32 correspond to the predetermined first escape routing 32.

[0095] The second conductor layer 4 also includes a plurality of first ground conductors 48. The first ground conductors 48 are provided in positions facing, in the Y-axis direction (second direction), an area M1 between any two of the plurality of receiving electrodes 31 that are adjacent in the X-axis direction (first direction). That is, a plurality of areas M1 are provided, and the first ground conductors 48 are provided in a plurality of positions facing the areas M1. As shown in FIG. 9 , the first ground conductors 48 face portions of two shield sections 321 of two first escape wirings 32 that are respectively connected to two adjacent receiving electrodes 31. More specifically, the first ground conductors 48 face a first portion 3210 (see FIG. 4 ) of one shield section 321 and a second portion 3211 (see FIG. 4 ) of the other shield section 321.

[0096] The length L7 of the first ground conductor 48 in the X-axis direction (first direction) is preferably 50% or more of the length (distance L1) in the X-axis direction (first direction) of the area M1 that faces the first ground conductor 48 in the Y-axis direction (second direction). In this embodiment, the length L7 is 80% or more of the distance L1.

[0097] Similarly to the first embodiment, each of the multiple transmitting electrodes 41 has a mesh shape. The first ground conductor 48 is, for example, a ladder wiring in which multiple ladder-shaped structures are arranged in parallel and connected to each other. When viewed in the thickness direction of the substrate S1, the density of the first ground conductor 48 is greater than the density of each of the multiple transmitting electrodes 41. In this embodiment, the definition of conductor density is the same as in the first embodiment. Because the density of the first ground conductor 48 is relatively high, the first ground conductor 48 easily absorbs and suppresses electric fields.

[0098] The first ground conductor 48 may be a solid wiring.

[0099] The second conductor layer 4 includes a second ground conductor 44 electrically connected to the first ground conductor 48. The configuration of the second ground conductor 44 is the same as that of the first embodiment. The first ground conductor 48 is connected to one end of the second ground conductor 44 on the first region R1 side. More specifically, when viewed in the Z-axis direction, the one end of the second ground conductor 44 has multiple recesses, and the multiple first ground conductors 48 are respectively arranged in the multiple recesses.

[0100] The second ground conductor 44 is provided at a position overlapping the first escape routings 32 when viewed in the thickness direction of the substrate S1 (see FIG. 9).

[0101] The second ground conductor 44 has a mesh-like shape. When viewed in the thickness direction of the substrate S1, the density of the first ground conductor 48 is greater than the density of the second ground conductor 44. Because the density of the first ground conductor 48 is relatively high, the first ground conductor 48 can easily absorb and suppress the electric field. Furthermore, because the density of the second ground conductor 44 is relatively low, the first escape routing 32 overlapping the second ground conductor 44 can be visually inspected through the second ground conductor 44.

[0102] The second conductor layer 4 also includes a third ground conductor 45 electrically connected to the second ground conductor 44. The configuration of the third ground conductor 45 is the same as that in the first embodiment. The second ground conductor 44 is located between the first ground conductor 48 and the third ground conductor 45.

[0103] When viewed in the thickness direction of the substrate S1, the density of the third ground conductor 45 is greater than the density of the second ground conductor 44. Because the density of the third ground conductor 45 is relatively high, the effective area of ​​the third ground conductor 45 (area excluding gaps) can be increased.

[0104] Third Embodiment Next, a member 2B for a touch sensor according to a third embodiment will be described with reference to Fig. 11. The same components as those in the second embodiment will be denoted by the same reference numerals and description thereof will be omitted.

[0105] In FIG. 11, the first conductor layer 3 is shown by a broken line, and the second conductor layer 4 is shown by a solid line.

[0106] In this embodiment, the multiple first ground conductors 48 have different dimensions. The farther a first ground conductor 48 is located from the second region R2 in the X-axis direction (first direction), the longer its length in the Y-axis direction (second direction). The longer the length of a first ground conductor 48 in the Y-axis direction, the larger the area of ​​the first ground conductor 48 can be. For example, in this embodiment, the length of each first ground conductor 48 in the X-axis direction is constant. Therefore, the farther a first ground conductor 48 is located from the second region R2 in the X-axis direction, the larger its area. The larger the area of ​​the first ground conductor 48, the greater the effect of suppressing capacitive coupling.

[0107] Generally, as the distance (wiring length) from the second region R2 increases, the distance over which the first escape routing 32 and the second escape routing 42 run side by side increases, which tends to increase the capacitance of the capacitive coupling between the first escape routing 32 and the second escape routing 42. Therefore, in this embodiment, the length of the first ground conductor 48 in the Y-axis direction increases as the distance from the second region R2 increases, thereby reducing the bias in the capacitance of the capacitive coupling. This can further improve the capacitance detection accuracy of the touch sensor 1.

[0108] Each of the first escape wirings 32 extends along the X-axis direction from a position facing the second region R2 and is partially bent in the Y-axis direction. In the right region shown in FIG. 11 , each of the second escape wirings 42 extends toward the negative Y-axis direction as it moves toward the positive X-axis direction. In other words, the second escape wirings 42 extend farther away from the first escape wirings 32 as it moves toward the positive X-axis direction. More specifically, the distance between each of the second escape wirings 42 and the first escape wirings 32 changes at a position facing an area M1 between the receiving electrodes 31. In other positions, each of the second escape wirings 42 is linear along the X-axis direction. As a result, the distance in the Y-axis direction (second direction) between the set of the first escape wirings 32 and the partial region R3 changes stepwise. The partial region R3 is a region in which a portion of each of two or more second escape routings 42 is provided along the X-axis direction. In Fig. 11, the distance changes to L8, L9, and L10 as one moves toward the positive side of the X-axis. Here, L8<L9<L10. The farther from the second region R2, the longer the distance in the Y-axis direction between the set of multiple first escape routings 32 and the partial region R3, thereby reducing the electrostatic capacitance of the capacitive coupling.

[0109] Fourth Embodiment Next, a member 2C for a touch sensor according to a fourth embodiment will be described with reference to Fig. 12. The same components as those in the third embodiment will be denoted by the same reference numerals and description thereof will be omitted.

[0110] The configuration of the first conductor layer 3 in this embodiment is the same as that in embodiment 3. In this embodiment, the shape of the plurality of second escape wirings 42 in the partial region R3 of the second conductor layer 4 is linear along the X-axis direction, which allows the area occupied by the plurality of second escape wirings 42 to be reduced.

[0111] Although no first ground conductor 48 is provided on the second conductor layer 4 in FIG. 12 , in this embodiment, as in the second or third embodiment, the second conductor layer 4 may have at least one first ground conductor 48.

[0112] Fifth Embodiment Next, a member 2D for a touch sensor according to a fifth embodiment will be described with reference to Fig. 13. The same components as those in the fourth embodiment will be denoted by the same reference numerals and description thereof will be omitted.

[0113] The configuration of the second conductor layer 4 in this embodiment is the same as that in the fourth embodiment. In this embodiment, the configuration of the multiple first escape routings 32 of the first conductor layer 3 differs from that in the fourth embodiment. That is, each first escape routing 32 has a routing portion 323 connecting the shield portion 321 and the terminal portion 33, and the routing portion 323 includes a first routing portion 3231, a second routing portion 3232, and a third routing portion 3233. The first routing portion 3231 extends linearly from the shield portion 321 toward the negative side of the Y axis and the negative side of the X axis (diagonally relative to the Y axis and the X axis). The second routing portion 3232 extends linearly from the first routing portion 3231 along the X axis direction. The third routing portion 3233 extends linearly from the second routing portion 3232 to the terminal portion 33 toward the negative side of the Y axis.

[0114] Although no first ground conductor 48 is provided on the second conductor layer 4 in FIG. 13 , in this embodiment, as in the second or third embodiment, the second conductor layer 4 may include at least one first ground conductor 48.

[0115] (Other Modifications) Other modifications of each embodiment are listed below. The following modifications may be realized in appropriate combination.

[0116] The first conductor layer 3 and the second conductor layer 4 do not have to be embedded in the substrate 5 as shown in FIG. 2 . The first conductor layer 3 may be laminated on the front surface of the substrate 5 as shown in FIG. 14 , and the second conductor layer 4 may be laminated on the rear surface of the substrate 5 as shown in FIG. 14 . In this case, the entire substrate 5 corresponds to the insulating layer 51. For example, a conductor is formed on the entire front surface of the substrate 5, and then a portion of the conductor is removed by etching to form the first conductor layer 3. Alternatively, for example, a conductor is formed on the entire rear surface of the substrate 5, and then a portion of the conductor is removed by etching to form the second conductor layer 4. Even in this modified example, the touch sensor member 2 can be used by bonding the cover member 11 to it via a transparent adhesive layer.

[0117] The substrate S1 is not limited to a double-sided substrate, but may be a multilayer substrate. A multilayer substrate has three or more conductor layers. The multilayer substrate may have a configuration in which an insulating member including an insulating layer 51 is interposed between the conductor layers.

[0118] The two first escape wirings 32a, 32b connected to the two receiving electrodes 31a, 31b at both ends in the X-axis direction, respectively, may not have the second portion 3211 of the shield part 321. In other words, as shown in Fig. 1 , since no other first escape wirings 32 are arranged on the negative side of the first escape wiring 32a in the X-axis direction, the second portion 3211 of the first escape wiring 32a does not need to receive the electric field generated from the transmitting electrode 41, and therefore the second portion 3211 is unnecessary. For the same reason, the second portion 3211 is also unnecessary for the first escape wiring 32b.

[0119] Not only the two first escape routings 32 a and 32 b, but also some of the first escape routings 32 may not have the second portion 3211. In other words, it is sufficient that at least one first escape routing 32 has the second portion 3211.

[0120] The density of each receiving electrode 31, the density of each transmitting electrode 41, and the density of the second ground conductor 44 may be equal to each other. Alternatively, one of these three configurations may have a different density from the other two. Alternatively, these three configurations may each have a different density.

[0121] The material of the first conductor layer 3 and the second conductor layer 4 is not limited to copper, but may be, for example, silver or a conductive resin.

[0122] The material of the insulating layer 51 is not limited to a PET (polyethylene terephthalate) film, but may be, for example, glass fiber or a PC (polycarbonate) film.

[0123] The configurations of the above-described embodiments may be combined as appropriate. For example, the configuration of Fig. 13 may be used for the first conductor layer 3, and the configuration of Fig. 11 may be used for the second conductor layer 4.

[0124] (Summary) The above-described embodiments and the like disclose the following aspects.

[0125] A touch sensor member (2, 2A to 2D) according to a first aspect is used in a capacitive touch sensor (1). The touch sensor member (2, 2A to 2D) includes a substrate (S1). The substrate (S1) has a first conductor layer (3), a second conductor layer (4), and an insulating layer (51). The insulating layer (51) is provided between the first conductor layer (3) and the second conductor layer (4). The insulating layer (51) has electrical insulation properties. The first conductor layer (3) includes a plurality of receiving electrodes (31) and a plurality of first escape wirings (32). The plurality of receiving electrodes (31) are arranged in a first region (R1) when viewed from the thickness direction of the substrate (S1). The plurality of receiving electrodes (31) are aligned in a first direction perpendicular to the thickness direction. The plurality of first escape wirings (32) are connected to the plurality of receiving electrodes (31). The second conductor layer (4) includes a plurality of transmitting electrodes (41) and a plurality of second outgoing wirings (42). The plurality of transmitting electrodes (41) are arranged in a first region (R1) when viewed from the thickness direction. The plurality of transmitting electrodes (41) are aligned in a second direction. The second direction is orthogonal to both the thickness direction and the first direction. The plurality of second outgoing wirings (42) are connected to the plurality of transmitting electrodes (41). Each of the plurality of receiving electrodes (31) has a linear shape extending along the second direction. Each of the plurality of transmitting electrodes (41) has a linear shape extending along the first direction. When viewed from the thickness direction, each of the plurality of first outgoing wirings (32) is provided from a first peripheral portion of the first region (R1) to a second peripheral portion of the second region (R2). The second region (R2) is aligned in the second direction relative to the first region (R1). Among the plurality of receiving electrodes (31), there is an area (M1) between any two adjacent receiving electrodes (31) in the first direction. A predetermined first outgoing wiring (32) among the plurality of first outgoing wirings (32) has a shield portion (321) and a connecting portion (322). The shield portion (321) faces, in the second direction, two areas (M1) on both sides of the predetermined receiving electrode (31) connected to the predetermined first outgoing wiring (32). The connecting portion (322) has a first end (t1) connected to the predetermined receiving electrode (31) and a second end (t2) connected to the shield portion (321). The shield portion (321) extends from the second end (t2) of the connecting portion (322) to both sides in the first direction.

[0126] According to the above configuration, the electric field generated from a portion of the transmitting electrode (41) is absorbed and suppressed by the shield portion (321) of a predetermined first escape wiring (32), thereby reducing the possibility that the electric field generated from the portion will be transmitted as noise to another first escape wiring (32) adjacent to the predetermined first escape wiring (32). In other words, it is possible to control which wiring the noise will be transmitted to. This improves the detection accuracy of the capacitance in the touch sensor (1).

[0127] In the touch sensor member (2, 2A to 2D) according to the second aspect, in the first aspect, two or more of the plurality of first escape wirings (32) are connected to two or more receiving electrodes (31) between two receiving electrodes (31 a, 31 b) arranged at both ends in the first direction, among the plurality of receiving electrodes (31). Each of the two or more first escape wirings (32) corresponds to a predetermined first escape wiring (32).

[0128] According to the above configuration, each of the two or more first escape wirings (32) has a shield portion (321). Therefore, the influence of the electric field (noise) generated from the transmission electrode (41) can be distributed to the two or more first escape wirings (32). This reduces the possibility of noise concentrating on some of the first escape wirings (32). This further improves the capacitance detection accuracy of the touch sensor (1).

[0129] In addition, in the touch sensor member (2, 2A to 2D) relating to the third aspect, in the first or second aspect, the length (L2, L3) in the first direction of the portion of the shield portion (321) between the second end (t2) of the connecting portion (322) and the tip of the shield portion (321) is 25% or more of the length (distance L1) in the first direction of the area (M1) facing the above portion in the second direction.

[0130] According to the above configuration, since the shield portion (321) is long to a certain extent, the shield portion (321) can easily absorb and suppress the electric field.

[0131] In addition, in a touch sensor member (2A, 2B) according to a fourth aspect, in any one of the first to third aspects, the second conductor layer (4) further includes a ground conductor (first ground conductor 48). The ground conductor (first ground conductor 48) is located between the first region (R1) and the plurality of first escape wirings (32) as viewed in the thickness direction, and is provided at a position facing the area (M1) in the second direction.

[0132] According to the above configuration, the electric field generated from the transmitting electrode (41) can be absorbed and suppressed by the ground conductor (first ground conductor 48), thereby further improving the capacitance detection accuracy of the touch sensor (1).

[0133] In addition, in the touch sensor member (2A, 2B) according to the fifth aspect, in the fourth aspect, the ground conductor (first ground conductor 48) is provided in a position facing the shield portion (321) of a predetermined first extraction wiring (32) in the second direction.

[0134] According to the above configuration, noise carried on the predetermined first escape routing (32) can be reduced.

[0135] In addition, in the touch sensor member (2A, 2B) according to a sixth aspect, in the fourth or fifth aspect, the second conductor layer (4) includes a plurality of ground conductors (first ground conductors 48) including a ground conductor (first ground conductor 48). The plurality of ground conductors (first ground conductors 48) are provided at positions facing in the second direction with respect to an area (M1) between any two of the plurality of receiving electrodes (31) that are adjacent in the first direction.

[0136] According to the above configuration, since the corresponding ground conductor (first ground conductor 48) faces each of all the areas (M1), the electric field generated from the transmitting electrode (41) can be more effectively absorbed and suppressed.

[0137] In addition, in the touch sensor member (2B) according to the seventh aspect, in the sixth aspect, the length in the second direction of the plurality of ground conductors (first ground conductors 48) is longer as the ground conductors (first ground conductors 48) are located farther from the second region (R2) in the first direction.

[0138] Generally, as the distance (wiring length) from the second region (R2) increases, the parallel running distance between the transmitting electrode (41) and the receiving electrode (31) increases, which tends to increase the capacitance of the capacitive coupling between the transmitting electrode (41) and the receiving electrode (31). Therefore, in the above configuration, the length of the ground conductor (first ground conductor 48) in the second direction increases as the ground conductor (first ground conductor 48) is farther from the second region (R2), thereby reducing the bias in the capacitance of the capacitive coupling. This further improves the capacitance detection accuracy of the touch sensor (1).

[0139] In addition, in the touch sensor member (2A, 2B) according to the eighth aspect, in any one of the fourth to seventh aspects, the length (L7) in the first direction of the ground conductor (first ground conductor 48) is 50% or more of the length (distance L1) in the first direction of the area (M1) facing the ground conductor (first ground conductor 48) in the second direction.

[0140] According to the above configuration, the ground conductor (first ground conductor 48) is long enough to easily absorb and suppress the electric field.

[0141] In a touch sensor member (2A, 2B) according to a ninth aspect, in any one of the fourth to eighth aspects, each of the plurality of transmitting electrodes (41) has a mesh shape, and the density of the ground conductor (first ground conductor 48) is greater than the density of each of the plurality of transmitting electrodes (41) when viewed from the thickness direction.

[0142] According to the above configuration, the density of the ground conductor (first ground conductor 48) is relatively high, and therefore the ground conductor (first ground conductor 48) easily absorbs and suppresses the electric field.

[0143] In addition, in a touch sensor member (2A, 2B) according to a tenth aspect, in any one of the fourth to ninth aspects, the second conductor layer (4) further includes a second ground conductor (44). The second ground conductor (44) is electrically connected to the first ground conductor (48) serving as the ground conductor (first ground conductor 48). The second ground conductor (44) is provided at a position overlapping with a plurality of first extraction wirings (32) as viewed from the thickness direction. The second ground conductor (44) has a mesh-like shape. As viewed from the thickness direction, the density of the first ground conductor (48) is greater than the density of the second ground conductor (44).

[0144] According to the above configuration, the density of the first ground conductor (48) is relatively high, and therefore the first ground conductor (48) is likely to absorb and suppress the electric field.

[0145] In a touch sensor member (2A, 2B) according to an eleventh aspect, in the tenth aspect, the second conductor layer (4) further includes a third ground conductor (45). The third ground conductor (45) is electrically connected to the second ground conductor (44). The second ground conductor (44) is provided between the first ground conductor (48) and the third ground conductor (45). When viewed in the thickness direction, the density of the third ground conductor (45) is greater than the density of the second ground conductor (44).

[0146] According to the above configuration, the ground area of ​​the substrate S1 can be increased compared to a case where the third ground conductor 45 is not provided. Furthermore, since the density of the third ground conductor 45 is relatively high, the effective area of ​​the third ground conductor 45 can be increased.

[0147] Furthermore, in a touch sensor member (2, 2A, 2B) according to a twelfth aspect, in any one of the first to eleventh aspects, the second conductor layer (4) includes a partial region (R3). In the partial region (R3), a portion of each of two or more second escape wirings (42) among the plurality of second escape wirings (42) is provided along the first direction. As viewed from the thickness direction, the plurality of first escape wirings (32) are provided between the first region (R1) and the partial region (R3). As viewed from the thickness direction, the distance in the second direction between the set of the plurality of first escape wirings (32) and the partial region (R3) is longer as the position of the distance measurement target is located farther from the second region (R2) in the first direction.

[0148] Generally, as the distance (wiring length) from the second region (R2) increases, the distance over which the first outgoing wiring (32) and the second outgoing wiring (42) run side by side increases, which tends to increase the capacitance of the capacitive coupling between the first outgoing wiring (32) and the second outgoing wiring (42). Therefore, in the above configuration, the distance between the first outgoing wiring (32) and the second outgoing wiring (42) is increased the farther from the second region (R2), thereby reducing the bias in the capacitance of the capacitive coupling. This further improves the capacitance detection accuracy of the touch sensor (1).

[0149] In addition, in the touch sensor member (2, 2A to 2D) according to the thirteenth aspect, in any one of the first to twelfth aspects, the shape of the connecting portion (322) is linear along the second direction.

[0150] According to the above configuration, the possibility of capacitive coupling occurring between the connecting portion (322) and the transmitting electrode (41) can be reduced compared to when the connecting portion (322) has a portion along the first direction.

[0151] The configurations other than those of the first aspect are not essential for the touch sensor member (2, 2A to 2D) and can be omitted as appropriate.

[0152] REFERENCE SIGNS LIST 1 touch sensor 2, 2A to 2D touch sensor member 3 first conductor layer 4 second conductor layer 31 receiving electrode 32 first lead-out wiring 41 transmitting electrode 42 second lead-out wiring 44 second ground conductor 45 third ground conductor 48 first ground conductor (ground conductor) 51 insulating layer 321 shielding part 322 connecting part L1 distance (length) L2, L3 length L7 length M1 area R1 first region R2 second region R3 partial region S1 substrate t1 first end t2 second end

Claims

1. A touch sensor member used in a capacitive touch sensor, a substrate having a first conductor layer, a second conductor layer, and an insulating layer having electrical insulation properties and provided between the first conductor layer and the second conductor layer; The first conductor layer is a plurality of receiving electrodes arranged in a first region as viewed in a thickness direction of the substrate and aligned in a first direction perpendicular to the thickness direction; a plurality of first escape wirings connected to the plurality of receiving electrodes; The second conductor layer is a plurality of transmitting electrodes arranged in the first region when viewed from the thickness direction and aligned in a second direction perpendicular to both the thickness direction and the first direction; a plurality of second escape wirings connected to the plurality of transmitting electrodes, each of the plurality of receiving electrodes has a linear shape extending along the second direction; each of the plurality of transmitting electrodes has a linear shape extending along the first direction; When viewed from the thickness direction, each of the plurality of first escape wirings is provided from a first peripheral portion of the first region to a second peripheral portion of a second region aligned in the second direction with respect to the first region, an area is provided between any two of the plurality of receiving electrodes that are adjacent to each other in the first direction; A predetermined first escape wiring among the plurality of first escape wirings is a shield portion facing, in the second direction, two areas on both sides of a predetermined receiving electrode connected to the predetermined first escape wiring; a connecting portion having a first end connected to the predetermined receiving electrode and a second end connected to the shield portion; The shield portion extends from the second end of the connecting portion to both sides in the first direction. Touch sensor components.

2. two or more of the plurality of first escape wirings are connected to two or more receiving electrodes between two receiving electrodes arranged at both ends in the first direction, among the plurality of receiving electrodes; each of the two or more first escape wirings corresponds to the predetermined first escape wiring; The touch sensor member according to claim 1 .

3. a length in the first direction of a portion of the shield portion between the second end of the connecting portion and the tip of the shield portion is 25% or more of a length in the first direction of the area facing the portion in the second direction; The touch sensor member according to claim 1 or 2.

4. the second conductor layer further includes a ground conductor located between the first region and the plurality of first escape wirings as viewed in the thickness direction and facing the area in the second direction. The touch sensor member according to claim 1 or 2.

5. the ground conductor is provided at a position facing the shield portion of the predetermined first escape routing in the second direction; The touch sensor member according to claim 4 .

6. the second conductor layer includes a plurality of ground conductors including the ground conductor; the plurality of ground conductors are provided at positions facing, in the second direction, the area between any two of the plurality of receiving electrodes that are adjacent in the first direction; The touch sensor member according to claim 4 .

7. Among the plurality of ground conductors, the ground conductors located farther from the second region in the first direction have a longer length in the second direction. The touch sensor member according to claim 6 .

8. a length of the ground conductor in the first direction that is 50% or more of a length of the area facing the ground conductor in the second direction that is opposite the ground conductor in the first direction; The touch sensor member according to claim 4 .

9. Each of the plurality of transmitting electrodes has a mesh-like shape, When viewed from the thickness direction, the density of the ground conductor is greater than the density of each of the plurality of transmitting electrodes. The touch sensor member according to claim 4 .

10. the second conductor layer further includes a second ground conductor electrically connected to the first ground conductor serving as the ground conductor; the second ground conductor is provided at a position overlapping the plurality of first escape wirings when viewed from the thickness direction; the second ground conductor has a mesh shape, When viewed from the thickness direction, the density of the first ground conductor is greater than the density of the second ground conductor. The touch sensor member according to claim 4 .

11. the second conductor layer further includes a third ground conductor electrically connected to the second ground conductor; the second ground conductor is disposed between the first ground conductor and the third ground conductor, When viewed from the thickness direction, the density of the third ground conductor is greater than the density of the second ground conductor. The touch sensor member according to claim 10 .

12. the second conductor layer includes partial regions in which portions of two or more of the second escape wirings are provided along the first direction, When viewed from the thickness direction, the plurality of first escape wirings are provided between the first region and the partial region, a distance in the second direction between the set of the plurality of first escape routings and the partial region is longer as the position of the distance measurement target is farther from the second region in the first direction, as viewed from the thickness direction; The touch sensor member according to claim 1 or 2.

13. The shape of the connecting portion is a straight line along the second direction. The touch sensor member according to claim 1 or 2.