JP2022183347A - touch sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance position accuracy and sensitivity of sensing by narrowing a dead area of a view area and reduce the line breakage risk of routing wiring caused by abnormal discharge of static electricity, etc.

SOLUTION: In a mesh pattern 29c of a touch sensor 1c, vertexes 34 of cells 30 constituting one pattern row P of a pair of adjacent pattern rows are located at positions other than midpoints 33c of sides 33 of the cells 30 constituting the other pattern row.

SELECTED DRAWING: Figure 8

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to touch sensors.

Patent Document 1 discloses a touch sensor provided with a conductive film having a view area (sensor area) corresponding to a display screen of a display panel.

WO2015/079816

The conductive film includes a substrate, a first electrode and a second electrode formed opposite to each other on one main surface of the substrate within the view area, and a second electrode formed on one main surface of the substrate within the view area and a second electrode. and a routing wiring linearly extending from the electrode. The routing wiring is configured by a mesh pattern including a plurality of grids made of thin metal wires. Each grid is formed in a square shape of the same size, and one diagonal line extends along the direction in which the lead-out wiring extends (hereinafter referred to as "stretching direction"). In addition, the grids are arranged in alignment with each other so that the vertices of one adjacent grid overlap with the vertices of the other grid. In this touch sensor, the positional accuracy and sensitivity of sensing with respect to touch operations may decrease.

A touch sensor includes a view area obtained by transmitting visual information, sensor electrodes provided in the view area, and one or more lead-out wirings provided in the view area. The routing wiring is electrically connected to the sensor electrode and elongated along the first direction. Each of the one or more routing wirings is configured in a mesh pattern in which a plurality of cells made of conductive fine wires are arranged. Each of the plurality of cells has a first diagonal extending in the first direction and a second diagonal extending in a second direction intersecting the first direction and shorter than the first diagonal and having the same It has a plurality of parallelograms with dimensions. The second direction is perpendicular to the first direction. The plurality of parallelograms of the plurality of cells includes a first vertex and a second vertex that are both ends of the first diagonal line, a third vertex and a fourth vertex that are both ends of the second diagonal line, and a third vertex and a fourth vertex that are both ends of the second diagonal line. a first side portion extending from the first vertex to the third vertex in the first inclination direction; a second side portion extending from the second vertex to the fourth vertex in the first inclination direction; It further has a third side portion extending from the vertex to the third vertex in the second tilt direction, and a fourth side portion extending from the first vertex to the fourth vertex in the second tilt direction. The plurality of cells includes one or more first cells that are arranged along the second tilt direction and form the first pattern row, and one or more first cells that are arranged along the second tilt direction and form the first pattern row. and a plurality of second cells forming adjacent second pattern rows. The second vertex of one second cell of the plurality of second cells of the second pattern row is the fourth vertex of one first cell of the one or more first cells of the first pattern row. located on the edge of the second vertex of each of the one or more second cells of the second pattern row is located other than the midpoint of the fourth side of the one or more first cells of the first pattern row .

In this touch sensor, the dead area of the view area can be narrowed to improve the positional accuracy and sensitivity of sensing, and the risk of disconnection of the wiring due to abnormal discharge such as static electricity can be reduced.

FIG. 1 is an overall perspective view of the touch sensor according to the first embodiment. FIG. 2 is a plan view showing a substrate, electrodes, and lead wirings of the touch sensor according to the first embodiment. FIG. 3 is a schematic plan view of the mesh pattern of the touch sensor according to the first embodiment. FIG. 4 is a partially enlarged view of portion IV of the mesh pattern shown in FIG. FIG. 5 is a schematic plan view showing the mesh pattern of the touch sensor according to the second embodiment. FIG. 6 is a partially enlarged view of portion VI of the mesh pattern shown in FIG. FIG. 7 is a schematic diagram of a mesh pattern of another touch sensor according to the second embodiment. FIG. 8 is a schematic diagram of a mesh pattern of still another touch sensor according to the second embodiment.

Hereinafter, each embodiment of the present invention will be described in detail based on the drawings. The description of each embodiment below is merely illustrative in nature, and is not intended to limit the present invention, its applications, or its uses.

[First embodiment]
FIG. 1 is a perspective view showing the entire touch sensor 1 according to the first embodiment of the present invention. The touch sensor 1 is a sensor-type input device capable of touch operation. The touch sensor 1 can be used in various devices incorporating a display device such as a liquid crystal display or an organic EL display (for example, in-vehicle devices such as car navigation systems, personal computer display devices, mobile phones, personal digital assistants, portable game machines, It is used as an input device for copiers, ticket vending machines, automated teller machines, etc.).

In the following description, the positional relationship of the touch sensor 1 and its components is specified based on the up-down direction Dud and the left-right direction Dhm shown in each drawing. However, such a positional relationship is irrelevant to the actual orientation of the touch sensor 1 or the device in which the touch sensor 1 is incorporated.

(Cover member)
As shown in FIG. 1, the touch sensor 1 includes a cover member 2 having optical transparency. The cover member 2 consists of a cover glass or a plastic cover lens. The cover member 2 has, for example, a rectangular plate shape.

(view area)
A substantially picture-frame-shaped window frame portion 3 is formed in a dark color such as black by printing or the like on the outer periphery of the back surface of the cover member 2 . An internal rectangular area surrounded by the window frame portion 3 is provided as a transmissive view area 4 . The view area 4 is an area for obtaining visual information through the touch sensor 1 . In this embodiment, the view area 4 is configured such that the short sides extend along the vertical direction Dud and the long sides extend along the horizontal direction Dhm. Further, the surface of the cover member 2 corresponding to the view area 4 is configured as an operation surface that is touched by a user's finger or the like in accordance with touch operation.

(flexible wiring board)
The touch sensor 1 has a flexible wiring board 5 . The flexible wiring board 5 is flexible and configured so that its electrical characteristics do not change even in a deformed state. The flexible wiring board 5 is made of a flexible insulating film such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or the like.

(substrate)
FIG. 2 is a plan view of the touch sensor 1. FIG. As shown in FIG. 2 , the touch sensor 1 has a substrate 7 . The substrate 7 is made of a light-transmitting resin material such as polycarbonate, polyethylene terephthalate, polyethersulfone, PMMA (acrylic), polyarylate, or the like. The substrate 7 has a substantially rectangular shape. The substrate 7 may include a laminated resin film or the like. The thickness of the substrate 7 is, for example, approximately 0.01 mm to 4 mm. The surface of the substrate 7 is a surface 7a on which sensor electrodes 10 and the like, which will be described later, are arranged. The surface 7 a may be the back surface of the substrate 7 . A liquid crystal display 501 is arranged on the back side of the substrate 7 (see FIG. 1). Note that if the substrate 7 is made of a relatively hard material, the cover member 2 may not be provided. In this case, the substrate 7 is provided with a substantially frame-shaped window frame portion 3 to provide the view area 4 . The cover member 2 is laminated on the surface 7a of the substrate 7. As shown in FIG. The tip of the flexible wiring board 5 is fixed to the lower side of the surface 7a of the substrate 7 with, for example, an anisotropic conductive adhesive.

(Conductive part)
The touch sensor 1 has a conductive portion. The conductive part is arranged in the viewing area 4 . The conductive part has a plurality of sensor electrodes 10, a plurality of routing wirings 15, and ground electrodes 21 and 22 as main element members. The conductive portion is configured in a mesh pattern (details will be described later).

(Sensor electrode)
The plurality of sensor electrodes 10 are configured as a capacitive type capable of detecting a touch operation by a user's finger (object to be detected) in contact with the surface of the cover member 2 serving as an operation surface. The sensor electrode 10 is formed on the surface 7 a of the substrate 7 and extends along the vertical direction Dud of the view area 4 . The plurality of sensor electrodes 10 are arranged at intervals in the left-right direction Dhm.

Each of the sensor electrodes 10 has a plurality of transmitter electrodes 11 and receiver electrodes 12 . In FIG. 2, each of the transmitting electrodes 11 and the receiving electrodes 12 is hatched with different dots in order to emphasize the transmitting electrodes 11 and the receiving electrodes 12. As shown in FIG.

The transmission electrode 11 is connected to a drive circuit 502 (see FIG. 1) and configured to emit an electric field to the surroundings by the drive circuit 502 . The multiple transmission electrodes 11 are arranged in the vertical direction Dud. Further, each transmission electrode 11 has a substantially comb shape in plan view. The shape of the transmission electrode 11 is not limited to the comb shape, and may be various other shapes.

The receiving electrode 12 is configured to receive the electric field radiated from each transmitting electrode 11 . The receiving electrode 12 has a substantially comb shape in plan view. The receiving electrode 12 is arranged to face each transmitting electrode 11 with a gap in the left-right direction Dhm. A plurality of transmitting electrodes 11 and receiving electrodes 12 form a plurality of sensing nodes arranged in the vertical direction Dud. The shape of the receiving electrode 12 is not limited to the substantially comb shape, and may be various shapes.

The sensor electrodes 10 adjacent to each other are spaced apart so that the transmitting electrodes 11 face each other in the left-right direction Dhm. Further, each of the sensor electrodes 10 positioned on the outermost side in the horizontal direction Dhm among the plurality of sensor electrodes 10 is arranged such that the receiving electrodes 12 are positioned near the left and right ends within the view area 4 . Furthermore, the receiving electrode 12 of one sensor electrode 10 of the sensor electrodes adjacent to each other is spaced apart so as to face the receiving electrode 12 of the other sensor electrode 10 in the left-right direction Dhm.

In the sensor electrodes 10 adjacent to each other, when a predetermined potential different from the ground potential is applied to the transmitting electrodes 11 facing each other in the left-right direction Dhm, the ground potential is applied to the other transmitting electrodes 11. It is That is, the receiving electrode 12 is configured to be able to receive only the electric field emitted from the transmitting electrode 11 to which a predetermined potential is applied.

(routing wiring)
Each of the plurality of lead-out wirings 15 is composed of a mesh pattern 29 in which a plurality of cells 30 made of conductive thin wires 91 are arranged. The plurality of routing wirings 15 are electrically connected to the plurality of transmission electrodes 11, respectively. The plurality of routing wirings 15 includes a plurality of lower wirings 16 and a plurality of upper wirings 17 that are divided into two directions, the upward direction Du and the downward direction Dd. The plurality of lower wirings 16 are positioned in the downward direction Dd of the plurality of upper wirings 17 . The plurality of lower wirings 16 and the plurality of upper wirings 17 are arranged between the transmitting electrodes 11 adjacent to each other in the horizontal direction Dhm. That is, the area between the transmitting electrodes 11 becomes the dead area of the view area 4 . The dead area is an area where the sensor electrodes 10 are not arranged and touch operations cannot be detected. A region in which the sensor electrodes 10 are arranged and a touch operation can be detected is a detectable region.

Each lower wiring 16 extends from each transmission electrode 11 toward the lower side of the view area 4 in the vertical direction Dud, that is, the downward direction Dd. The plurality of lower wirings 16 are arranged in a state of being spaced apart from each other in the left-right direction Dhm between the transmitting electrodes 11 adjacent to each other. In the sensor electrodes 10 adjacent to each other, the uppermost lower wiring 16 among the plurality of lower wirings 16 is converged into a single line between the transmitting electrodes 11 adjacent to each other in the horizontal direction Dhm. It extends in the vertical direction Dud toward the lower side of the area 4 .

Each upper wiring 17 extends from each transmission electrode 11 toward the upper side of the view area 4 in the vertical direction Dud, ie, the upward direction Du. The plurality of upper wirings 17 are arranged in a state of being spaced apart from each other in the left-right direction Dhm between the transmitting electrodes 11 adjacent to each other. In the sensor electrodes 10 adjacent to each other, the two lowermost upper wirings 17 among the plurality of upper wirings 17 are converged into a single line between the transmitting electrodes 11 facing each other in the left-right direction Dhm. It extends in the vertical direction Dud toward the upper side of the view area 4 .

(ground electrode)
As shown in FIG. 2, the surface 7a of the substrate 7 is provided with a plurality of ground electrodes 21 and a plurality of ground electrodes 22 to which a ground potential is applied. Each of the ground electrodes 21 and 22 has a rectangular shape with long sides extending in the vertical direction Dud from the upper side to the lower side of the view area 4 in plan view. In FIG. 2 , the ground electrodes 21 and 22 are hatched with oblique lines in order to emphasize the ground electrodes 21 and 22 .

The ground electrode 21 is disposed between each of the plurality of wiring portions 18 connected to the plurality of upper wirings 17 and the sensor electrode 10 positioned on the outermost side in the left-right direction Dhm, on the outer left and right sides of the outer periphery of the view area 4. It is Specifically, the ground electrode 21 faces the receiving electrode 12 of the sensor electrode 10 positioned on the outermost side in the horizontal direction Dhm in the horizontal direction Dhm, and another ground electrode 21 is positioned at the end in the right direction Dm. It faces the receiving electrode 12 of the sensor electrode 10 in the horizontal direction Dhm. Also, the ground electrode 22 is disposed between the sensor electrodes 10 adjacent to each other and faces the receiving electrode 12 in the horizontal direction Dhm.

(Wiring part)
The touch sensor 1 includes a plurality of wiring portions 18 for electrical connection with external circuits such as the drive circuit 502 . A plurality of wiring portions 18 are arranged outside the view area 4 and concentrated under the substrate 7 . In addition, the plurality of wiring portions 18 are elongated in the longitudinal direction and arranged at intervals in a direction orthogonal to the longitudinal direction. One ends of the plurality of wiring portions 18 are electrically connected to the receiving electrodes 12, the plurality of lower wirings 16, the plurality of upper wirings 17, and the ground electrodes 21 and 22, respectively. The other ends of the multiple wiring portions 18 are electrically connected to the flexible wiring board 5 .

A plurality of wiring portions 18 respectively connected to the upper wirings 17 are routed from above the outer periphery of the view area 4 to below through the outside in the left-right direction Dhm. That is, each wiring portion 18 connected to each upper wiring 17 is routed downwardly of the view area 4 so as to follow the outer periphery of the view area 4 .

(mesh pattern)
FIG. 3 is a schematic plan view of the mesh pattern 29 of the touch sensor 1. FIG. FIG. 4 is a partial enlarged view of portion IV of the mesh pattern 29 shown in FIG. The routing wiring 15 is elongated in the vertical direction Dud. As shown in FIGS. 3 and 4, the conductive portion is composed of a plurality of fine conductive wires 91 arranged along a mesh pattern 29 having a predetermined shape. The mesh pattern 29 is composed of a plurality of cells 30 connected to each other. A plurality of conductive wires 91 cross each other and are arranged along a plurality of meshes 92 at equal intervals to form a mesh shape. Specifically, the mesh pattern 29 has a mesh structure in which a plurality of cells 30 made up of thin conductive wires 91 are regularly arranged. The plurality of cells 30 are arranged in the vertical direction Dud along which the routing wiring 15 extends. The cells 30 have a parallelogram shape with two diagonal lines 31, 32 of different lengths and are arranged along the parallelogram shape. In FIGS. 3 and 4, cell 30 consists of conductive wires 91 shown in solid lines. The parallelogram is composed of a cell 30 indicated by a solid line in which the thin conductive line 91 is arranged and a portion indicated by a broken line in which the thin conductive line 91 is not arranged. The portion indicated by the broken line where the thin conductive wire 91 is not formed can be formed by partially cutting the thin conductive wire after forming the thin conductive wire, or by not forming the thin conductive wire 91.

The material of the thin conductive wire 91 is preferably a conductive metal such as copper or silver, but may be another conductive material such as a conductive resin. Alternatively, the material of the thin conductive wire 91 is not limited to the conductive metal or conductive resin described above, and may be a transparent material such as a transparent conductive film having light transmittance such as indium tin oxide or tin oxide. The width of the conductive thin wire 91 is preferably about 2 μm, for example.

The parallelogram shapes of the plurality of cells 30 have the same size and are translated to overlap each other. In this embodiment, the cells 30 have the shape of a parallelogram with all four sides equal and diagonals 31 and 32 intersecting each other at right angles.

Diagonal 32 is shorter than diagonal 31 . Each of the plurality of cells 30 is arranged such that the diagonal line 31 extends in the vertical direction Dud in which the routing wiring 15 is elongated.

More specifically, as shown in FIG. 4, each cell 30 has a diagonal line 32 extending along the horizontal direction Dhm. In other words, diagonal line 32 is perpendicular to diagonal line 31 and length LB of diagonal line 32 is shorter than length LA of diagonal line 31 . It is preferable that the interior angle θ1 of the vertices 34 at both ends of the diagonal line 31 of each cell 30 is 45° to 75° and the interior angle θ2 of the vertices 34 at both ends of the diagonal 32 is 105° to 135°. More preferably, the internal angle θ1 is 60° and the internal angle θ2 is 120°.

In the mesh pattern 29, a plurality of linear pattern rows P1, P2, . . . , P6, . Of the pattern rows P1, P2, . . . , P6, . is tangent to the vertex 34 of . One intersection point PD is formed in one cell 30 among a plurality of cells 30 adjacent to each other (see FIG. 4).

As shown in FIG. 3, each cell of the other routing wiring 15 that is adjacent in the left-right direction Dhm to the imaginary line LC at which the vertex 34 of each cell 30 of one of the two routing wirings 15 that are adjacent to each other is in contact. A gap of dimension e1 in the left-right direction Dhm exists between the virtual line LC with which 30 is in contact. Dimension e1 is half the length LB of diagonal 32 . The pitch interval between the routing wires 15 adjacent to each other is the sum of the width LL of the routing wires 15 in the horizontal direction Dhm and the dimension e1. That is, the pitch interval between the routing wirings 15 adjacent to each other is twice the length LB of the diagonal line 32 of the cell 30 .

[Action and effect of the first embodiment]
The plurality of cells 30 has a parallelogram shape with the same size and different lengths of diagonal lines 31 and 32 . A diagonal line 31 longer than the diagonal line 32 extends in the vertical direction Dud in which the routing wiring 15 extends. Therefore, it becomes easier to form the routing wiring 15 elongated in the vertical direction Dud. As a result, it is possible to narrow the area occupied by the plurality of routing wirings 15 in the view area 4, that is, the dead area in which a touch cannot be detected, and relatively expand the detectable area in the view area 4. FIG. Therefore, in the touch sensor 1 according to the first embodiment, the dead area of the view area 4 can be narrowed to increase the positional accuracy and sensitivity of sensing.

In the conventional touch sensor disclosed in Patent Document 1, each lattice is formed in a square shape of the same size, and one diagonal line of each lattice extends along the extending direction. That is, the other diagonal line of each grid is formed to have the same length as the one diagonal line and extends in a direction orthogonal to the extending direction. As a result, the line width of the routed wiring becomes large, the area occupied by the routed wiring (that is, the dead area) within the sensor area is expanded, and the detectable area within the view area is relatively narrowed. As a result, in this touch sensor, the position accuracy and sensitivity of sensing with respect to touch operations may decrease.

In the touch sensor 1 according to the first embodiment, as described above, the dead area of the view area 4 can be narrowed to increase the positional accuracy and sensitivity of sensing.

In each cell 30, unlike the square shape, the diagonal line 32 extending in the horizontal direction Dhm is shorter than the diagonal line 31 extending in the vertical direction Dud. That is, each cell 30 has a rhombus shape, which is a parallelogram shape elongated in the vertical direction Dud. Therefore, the lead-out wiring 15 is elongated in the vertical direction Dud, so that the dead area of the view area 4 can be narrowed and the detectable area within the view area 4 can be relatively widened. As a result, the position accuracy and sensitivity of sensing can be further increased.

In addition, since the view area 4 of the touch sensor 1 substantially has a rectangular shape having a short side extending in the vertical direction Dud and a long side longer than the short side, the dimension for installing the vertical direction Dud of the routing wiring 15 is It's short and it's done. Moreover, since each cell 30 has a rhombus shape and the plurality of lead-out wirings 15 are arranged as described above, the width is narrower in the vertical direction than the lead-out wiring composed of a plurality of cells having a square shape. The wire length of the thin conductive wire 91 extending obliquely to Dud can be shortened. As the substantial wiring length of the conductive thin wire 91 is shortened, the resistance value of the routing wiring 15 is lowered. Therefore, the lead-out wiring 15 can shorten the time for charging the transmission electrode 11, and can increase the reaction speed and noise resistance.

As described above, the touch sensor 1 includes a view area 4 obtained by transmitting visual information, sensor electrodes 10 provided in the view area 4, and one or more wirings provided in the view area 4. and wiring 15 . One or more routing wirings 15 are electrically connected to the sensor electrode 10 and elongated along the vertical direction Dud. Each of the one or more lead-out lines 15 includes a plurality of cells 30 composed of conductive thin wires 91 arranged along a plurality of mutually connected cells 921 among the plurality of cells 30 that are mutually connected to form the mesh pattern 29. have. A plurality of cells 30 each have a plurality of parallelograms having the same size. Each of the plurality of parallelograms has a diagonal line 31 extending in the vertical direction Dud and a diagonal line 32 extending in the horizontal direction Dhm intersecting the vertical direction Dud and shorter than the diagonal line 31 .

The horizontal direction Dhm is perpendicular to the vertical direction Dud.

As shown in FIG. 4, each of the plurality of meshes 92 includes vertices 341 and 342 that are both ends of the diagonal line 31, vertices 343 and 344 that are both ends of the diagonal line 32, and an inclination direction Ds1 from the vertex 341 to the vertex 343. a side portion 332 extending from vertex 342 to vertex 344 in tilt direction Ds1; a side portion 333 extending from vertex 342 to vertex 343 in tilt direction Ds2; and a side portion 334 . The plurality of cells 30 includes a plurality of cells 921 arranged along the inclination direction Ds2 and forming the pattern row P3, and a plurality of cells arranged along the inclination direction Ds2 and forming a pattern row P4 adjacent to the pattern row P3. 922. Each vertex 341 of the plurality of cells 921 of the pattern row P3 is located at each vertex 342 of the plurality of cells 922 of the pattern row P4.

A plurality of cells 921 forming pattern row P3 includes one cell 921a and the other cell 921b adjacent to each other. The side portion 331 of one cell 921a is arranged so as to overlap the side portion 332 of the other cell 921b. A plurality of cells 922 forming pattern row P4 includes one cell 922a and the other cell 922b adjacent to each other. The side portion 331 of one cell 922a is arranged so as to overlap the side portion 332 of the other cell 922b.

The side portion 331 of one cell 921a is arranged so as to substantially completely overlap the side portion 332 of the other cell 921b. The side portion 331 of one cell 922a is arranged so as to substantially completely overlap the side portion 332 of the other cell 922b. The view area 4 substantially has a rectangular shape having a short side 4a extending in the vertical direction Dud and a long side 4b longer than the short side 4a.

[Second embodiment]
FIG. 5 is a schematic plan view of the mesh pattern 29a of the touch sensor 1a according to the second embodiment. FIG. 6 is a partially enlarged view of portion VI of the mesh pattern shown in FIG. The touch sensor 1a according to the second embodiment differs from that according to the first embodiment in the configuration of the mesh pattern 29 . Other configurations of the touch sensor 1a according to this embodiment are the same as those of the touch sensor 1 according to the first embodiment. Therefore, in the following description, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 5 and 6, the vertexes 34 of the cells 30 forming one pattern row P of two adjacent pattern rows P1, P2, . . . , P6, . are arranged in a mutually shifted state so as to be positioned in the middle of the side portions 33 of the cells 30 constituting the . Specifically, the vertex 34 of the cell 30 forming one of the pattern lines adjacent to each other is positioned at the midpoint 334c of the side portion 33 of the cell 30 forming the other pattern line P. FIG.

In the mesh pattern 29a, as shown in FIG. 6, two intersection points PD and PD1 are formed in one cell 30 of cells 30 adjacent to each other. That is, the cells 30 and the adjacent cells 30 are double-wired by extending in the vertical direction Dud a plurality of conductive thin wire rows each formed of a plurality of conductive thin wires 91 arranged in the horizontal direction Dhm and connected to each other. ing. In addition, since the side portions 33 of the cells 30 adjacent to each other are staggered so as not to be continuous on a straight line, occurrence of moire in the view area 4 can be suppressed.

Also, as shown in FIG. 5, the vertex 34 at the end of the diagonal line 32 of the cell 30 of one of the adjacent routing wires 15 and the vertex 34 of the end of the diagonal line 32 of the cell 30 of the other routing wire 15 are spaced apart from each other on one virtual line LC extending in the vertical direction Dud. The pitch interval between the routing wirings 15 adjacent to each other is LL, which is 1.5 times the length LB of the diagonal line 32 .

[Action and effect of the second embodiment]
Here, in the touch sensor 1 according to the first embodiment, only the vertices 34 of the cells 30 adjacent to each other overlap. In this case, since the number of intersections of the conductive thin wire 91 is 1, if the routing wiring 15 is subjected to an abnormal discharge such as static electricity, if the influence acts on the one intersection, the vertical Dud of the routing wiring 15 will occur. One portion extending to the wire may break. On the other hand, in the touch sensor 1a according to the second embodiment, the vertexes 34 of the cells 30 of one of the pattern rows P1, P2, . . . , P6, . They are arranged in a mutually shifted state so as to be positioned in the middle of the side portion 33 of the constituting cell 30 . As a result, the number of intersections of the conductive thin wires 91 forming the mesh pattern 29 in one cell 30 of the cells 30 adjacent to each other is two, and the vertexes 34 of the cells 30 of the touch sensor 1 according to the first embodiment overlap each other. It is possible to increase the number of intersections of the conductive thin wires 91 compared to the configuration. Therefore, in the touch sensor 1a according to the second embodiment, it is possible to reduce the risk of disconnection of the wiring 15 due to abnormal discharge such as static electricity.

In addition, a vertex 34 positioned on the diagonal line 32 of each cell 30 of one of the two routing wirings 15 adjacent to each other and a vertex 34 positioned on the diagonal line 32 of each cell 30 of the one routing wiring 15 are spaced apart from each other so as to be positioned on a virtual line LC extending in the vertical direction Dud. Therefore, it is possible to shorten the pitch interval between the routing wirings 15 that are adjacent to each other in the left-right direction Dhm. As a result, the dead region of the view area 4 can be narrowed, and the positional accuracy and sensitivity of sensing can be further increased.

As described above, as shown in FIGS. 5 and 6, the plurality of cells 30 includes one or more cells 921 arranged along the tilt direction Ds2 and forming the pattern row P4, and one or more cells 921 arranged along the tilt direction Ds2. and a plurality of cells 922 forming a pattern row P5 adjacent to the pattern row P4. The vertex 341 of one cell 922 of the plurality of cells 922 of the pattern row P5 is positioned at the side portion 334 of one cell 021 of the one or more cells 921 of the pattern row P4.

One or more cells 921 forming the pattern row P4 include one cell 921a and the other cell 921b adjacent to each other. The side portion 331 of one cell 921a is arranged so as to overlap the side portion 332 of the other cell 921b.

The side portion 331 of one cell 921a is arranged so as to substantially completely overlap the side portion 332 of the other cell 921b. The side portion 331 of one cell 922a is arranged so as to substantially completely overlap the side portion 332 of the other cell 922b.

As shown in FIG. 6, the vertex 343 of each of the one or more cells 922 of the pattern row P5 is positioned at the midpoint 334c of the side portion 334 of the one or more cells 921 of the pattern row P4.

As shown in FIG. 5, the one or more routing wires 15 include a routing wire 15a and a routing wire 15b adjacent to the routing wire 15a, and the sensor electrodes 10 are connected to the transmission electrodes 11 connected to the routing wires 15a. , and the receiving electrode 12 connected to the routing wiring 15b. The vertices 344 of two or more cells 30a forming the routing wiring 15a among the plurality of cells 30 and the vertices 343 of the two or more cells 30b forming the routing wiring 15b among the plurality of cells 30 are arranged vertically. It lies on the imaginary line LC extending in the direction Dud.

[Modification 1 of Second Embodiment]
FIG. 7 is a schematic diagram of a mesh pattern 29b of another touch sensor 1b according to the second embodiment. In FIG. 7, the same parts as those of the mesh pattern 29a of the touch sensor 1a shown in FIGS. 5 and 6 are given the same reference numerals. In the mesh pattern 29b of the touch sensor 1b shown in FIG. 7, part of the conductive thin wires 91 of the cells 30 of the mesh pattern 29 that constitutes the routing wiring 15 is omitted. Specifically, in the mesh pattern 29b shown in FIG. 7, the thin conductive wires 91 are not arranged between the vertex 34 of one of the cells 30 adjacent to each other and the vertex 34 of the other cell 30, so that there is an opening. The touch sensor 1b can have the same effects as the touch sensor 1a shown in FIGS.

[Modification 2 of Second Embodiment]
FIG. 8 is a schematic diagram of a mesh pattern 29c of still another touch sensor 1c according to the second embodiment. In FIG. 8, the same parts as those of the mesh pattern 29a of the touch sensor 1a shown in FIGS. 5 and 6 are given the same reference numerals. In the mesh pattern 29c of the touch sensor 1c shown in FIG. 8, the vertices 34 of the cells 30 forming one pattern row P of the adjacent pattern rows are located in the sides 33 of the cells 30 forming the other pattern row. It is positioned other than point 33c. Specifically, in the mesh pattern 29c shown in FIG. 8, the vertices 34 of the cells 30 forming one of the pattern lines adjacent to each other are located on the sides 33 of the cells 30 forming the other pattern line. is positioned at an intermediate position 33p between the vertex 34 and the midpoint 33c of the side portion 33 at . A virtual line LC passing through the vertexes 34 of the cells 30 of one of the adjacent routing wires 15 and a virtual line LC passing through the vertexes 34 of the cells 30 of the other routing wire 15 . The distance in the left-right direction Dhm of the gap between is the dimension e2 or the dimension e3. Dimension e2 is 3/4 of length LB of diagonal 32 . On the other hand, the dimension e3 is ¼ of the length LB of the diagonal line 32 .

In the touch sensor 1c shown in FIG. 8, the number of intersections of the thin conductive wires 91 is two on one side of the cells 30 adjacent to each other. It is possible to reduce the risk of disconnection of the routing wiring 15 .

[Other embodiments]
In each of the above-described embodiments, each cell 30 has a rhombus shape, but is not limited to this shape. For example, the shape of each cell 30 may be a parallelogram or rectangle with all four equal corners. Alternatively, the shape of each cell 30 may be a parallelogram that is neither a square, a rhombus, nor a rectangle. That is, the shape of each cell 30 of the touch sensor according to the embodiment is a parallelogram other than a square.

In addition, in each of the above-described embodiments, the diagonal line 31 of each cell 30 extends in the vertical direction Dud along which the lead-out wiring 15 extends, but the present invention is not limited to this form. That is, the diagonal line 31 of each cell 30 does not necessarily extend in the vertical direction Dud. In the touch sensor according to the embodiment, regardless of the direction in which the diagonal line 31 extends, the diagonal line 31 eventually extends in the vertical direction Dud. there is

In the touch sensor according to each of the embodiments described above, a plurality of sensor electrodes 10 are provided in the view area 4, but the configuration is not limited to this. That is, in the touch sensor, at least one sensor electrode 10 is provided within the view area 4 .

In addition, although the touch sensor according to each of the above-described embodiments is provided with a plurality of routing wirings 15, the present invention is not limited to this form. That is, in the touch sensor according to the embodiment, at least one routing wiring 15 is provided within the view area 4 . Even with such a touch sensor, the dead area of the view area 4 can be narrowed to increase the positional accuracy and sensitivity of sensing. Further, by increasing the number of intersections of the thin conductive wires 91 in the plurality of cells 30 as in the touch sensor 1a according to the second embodiment, the disconnection risk of the routing wiring 15 can be reduced.

Further, in the touch sensor according to each of the above embodiments, each sensor electrode 10 has a plurality of transmission electrodes 11 and reception electrodes 12, but the configuration is not limited to this. That is, each sensor electrode 10 may have one transmitter electrode 11 and multiple receiver electrodes 12 . In such a form, the arrangement of the transmitting electrodes 11 and the receiving electrodes 12 described in the above embodiment are replaced with each other. In this case, the plurality of routing wirings 15 (the lower wirings 16 and the upper wirings 17) are electrically connected to the plurality of receiving electrodes 12, respectively.

5 to 8, which are schematic plan views schematically showing the configurations of the mesh patterns 29a to 29c of the touch sensors 1a to 1c according to the second embodiment and their modifications, the side portions are completely overlapped. Pattern rows P1, P2, . . . , P6, . do not have. For example, a plurality of pattern rows P1, P2, . . . , P6, . Even with this configuration, the same effects as those of the second embodiment can be obtained.

In addition, in each cell 30 of the touch sensor in each embodiment, not only the routing wiring 15 but also a plurality of transmission electrodes 11 and reception electrodes 12 may be formed. That is, the transmitting electrodes 11 and the receiving electrodes 12 may be formed by the mesh patterns 29 (29a to 29c). When the cells 30 have exactly the same shape in the mesh patterns 29 (29a to 29c), the area ratio is the same and the transmittance and the like are the same. In particular, by forming the transmitting electrode 11 and the receiving electrode 12 with the mesh pattern 29a (29b, 20c) according to the second embodiment, moire generation can be suppressed and the risk of disconnection of the conductive thin wire 91 can be preferably reduced.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the disclosure.

In the embodiments, terms indicating directions such as "vertical direction", "upward direction", "downward direction", "upward", "downward", "horizontal direction", "leftward direction", "rightward direction", "upper wiring", "lower wiring", etc. It indicates a relative direction determined only by the relative positional relationship of the constituent members of the touch sensor such as the sensor electrode 10 and the routing wiring 15, and does not indicate an absolute direction such as a vertical direction.

1 touch sensor 2 cover member 3 window frame 4 view area 5 flexible wiring board 7 substrate 10 sensor electrode 11 transmission electrode (first electrode, second electrode)
12 receiving electrode 15 routing wiring 16 lower wiring 17 upper wiring 18 wiring part 21 ground electrode 22 ground electrode 29 mesh pattern 30 cell 31 diagonal line (first diagonal line)
32 diagonal (second diagonal)
33 side portion 34 vertex Dd downward direction Du upward direction Dud vertical direction (first direction)
Dm Right direction Dhm Horizontal direction (second direction)
LC virtual line P1-P6 pattern row

Claims (5)

A view area obtained through visual information,
a sensor electrode provided within the viewing area;
one or more lead-out lines provided in the view area, electrically connected to the sensor electrodes, and elongated along a first direction;
with
each of the one or more routing wirings is configured in a mesh pattern in which a plurality of cells made of conductive fine wires are arranged,
Each of the plurality of cells has a first diagonal line extending in the first direction and a second diagonal line extending in a second direction intersecting the first direction and shorter than the first diagonal line. and having a plurality of parallelograms having the same size,
the second direction is perpendicular to the first direction;
The plurality of parallelogram shapes of the plurality of cells include a first vertex and a second vertex that are both ends of the first diagonal line, and a third vertex and a fourth vertex that are both ends of the second diagonal line. a vertex, a first side extending from the first vertex to the third vertex in the first inclination direction, and a second side extending from the second vertex to the fourth vertex in the first inclination direction 2 side portions, a third side portion extending from the second vertex to the third vertex in a second tilt direction, and from the first vertex to the fourth vertex in the second tilt direction and a fourth side extending to
The plurality of cells includes one or more first cells arranged along the second tilt direction and forming a first pattern row, and one or more first cells arranged along the second tilt direction and forming the first pattern row. and a plurality of second cells forming a second pattern row adjacent to the pattern row of
The second vertex of one second cell of the plurality of second cells of the second pattern row corresponds to one first of the one or more first cells of the first pattern row. located on the fourth side of the cell of
The second vertex of each of the one or more second cells of the second pattern row is aligned with the fourth side of the one or more first cells of the first pattern row. A touch sensor located at a point other than the midpoint. The touch sensor according to claim 1, wherein
In the mesh pattern, the second vertex of each of the one or more second cells of the second pattern row is aligned with the second vertex of the one or more first cells of the first pattern row. A touch sensor located at an intermediate position between the midpoints of the four sides. The touch sensor according to claim 1, wherein
the plurality of second cells forming the second pattern row include one second cell and the other second cell adjacent to each other;
The touch sensor, wherein the first side portion of the one second cell is arranged to overlap the second side portion of the other second cell. The touch sensor according to claim 3,
The touch sensor, wherein the first side of the one second cell is arranged to substantially completely overlap the second side of the other second cell. The touch sensor according to any one of claims 1 to 4,
The touch sensor, wherein the view area substantially has a rectangular shape having a short side extending in the first direction and a long side longer than the short side.

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