JP7122577B2 - touch sensor - Google Patents

Description

The present disclosure relates to touch sensors.

2. Description of the Related Art Conventionally, there has been known a touch sensor capable of performing a touch operation, for example, the one disclosed in Patent Document 1.

In Patent Document 1, a transparent substrate, a substantially belt-shaped sensor electrode formed on the transparent substrate, one end portion of which is electrically connected to the sensor electrode, and the sensor electrode is electrically connected to an external circuit. and a wiring portion for connection. The sensor electrode is configured as a mesh pattern in which a plurality of fine wires made of conductive metal are formed in a mesh shape (see FIG. 6 of Patent Document 1).

JP 2017-151575 A

In the touch sensor of Patent Document 1, since the sensor electrodes are configured in the mesh pattern, the touch sensor has excellent translucency (see paragraph 0034 of Patent Document 1). However, for example, when a large external force is applied to the transparent substrate during the manufacturing process of the touch sensor, or when the transparent substrate is affected by static electricity, there is a possibility that the thin wires may break. In addition, in the touch sensor disclosed in Patent Document 1, it is not easy to check the electrical state including the sensor electrode when the thin wire is broken.

The present disclosure has been made in view of this point, and an object thereof is to make it possible to determine whether or not the electrical state including the sensor electrodes is normal.

In order to achieve the above object, a touch sensor according to an embodiment of the present disclosure includes a first mesh pattern in which a plurality of conductive first fine lines intersect with each other, and is formed into a substantially strip-shaped outer shape. an electrode, a wiring portion electrically connected to at least a first end in the longitudinal direction of the sensor electrode and for electrically connecting the sensor electrode to an external circuit, and a conductive portion electrically connected to the sensor electrode. , is equipped with The conductive part has a second mesh pattern arranged on the second end side opposite to the first end of the sensor electrode.

According to the present disclosure, it is possible to determine whether the electrical state including the sensor electrode is normal.

1 is an overall perspective view of a touch sensor according to an embodiment of the present disclosure; FIG. FIG. 2 is a plan view schematically showing a state in which the first and second substrates are overlaid. FIG. 3 is a plan view showing the configuration of the first substrate. FIG. 4 is a plan view showing the configuration of the second substrate. 5 is a partially enlarged plan view showing an enlarged portion A of FIG. 3. FIG. 6 is a partially enlarged plan view showing an enlarged portion B of FIG. 3. FIG. 7 is a partially enlarged plan view showing an enlarged portion C of FIG. 6. FIG. FIG. 8 is an enlarged cross-sectional view taken along line VIII--VIII of FIG. FIG. 9 is a view corresponding to FIG. 7 showing Modification 1 of the embodiment. FIG. 10 is a view corresponding to FIG. 7 showing Modification 2 of the embodiment. FIG. 11 is a view corresponding to FIG. 5 showing Modification 3 of the embodiment.

Hereinafter, embodiments of the present disclosure will be described in detail based on the drawings. The following description of the embodiments is merely exemplary in nature and is not intended to limit the present disclosure, its applications or uses.

FIG. 1 shows the entire touch sensor 1 according to an embodiment of the present disclosure. 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, copiers, ticket vending machines, automated teller machines, clocks, etc.).

In the following description, the long side direction of the touch sensor 1 (the direction from the lower left to the upper right in FIG. 1) is defined as the X-axis direction, while the short side direction of the touch sensor 1 (the right side in FIG. 1) is orthogonal to the X-axis direction. The direction from the bottom to the upper left) is defined as the Y-axis direction. Further, the vertical direction of the touch sensor 1 is defined by defining the operation surface 2b side of the cover member 2 described later as the "upper side" and the side opposite to the operation surface 2b as the "lower side". Note that 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 is formed in a rectangular plate shape, for example. The cover member 2 is laminated on the upper surface of the second substrate 6, which will be described later.

A substantially picture-frame-shaped window frame portion 2a is formed in a dark color such as black by printing or the like on the outer peripheral position of the cover member 2 . An internal rectangular area surrounded by the window frame portion 2a is a transmissive view area V (see FIG. 2). That is, the user can obtain visual information from the display arranged behind the touch sensor 1 through the view area V. FIG. The upper surface of the cover member 2 corresponding to the view area V is configured as an operation surface 2b with which a user's finger or the like comes into contact with a touch operation.

(flexible wiring board)
The touch sensor 1 has a flexible wiring board 3 . The flexible wiring board 3 is flexible and configured so that its electrical characteristics do not change even in a deformed state. The flexible wiring board 3 is made of a flexible insulating film such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or the like. The flexible wiring board 3 has its tip portion fixed to the upper surface side of a first substrate 5 and a second substrate 6, which will be described later, with an anisotropic conductive adhesive (not shown), for example.

(substrate)
As shown in FIGS. 2 to 4, the touch sensor 1 includes substrates 4,4. The substrates 4 , 4 consist of a first substrate 5 and a second substrate 6 . The second substrate 6 is laminated on the upper side of the first substrate 5 via a light-transmitting adhesive layer (not shown).

Each of the first and second substrates 5, 6 is made of optical material such as polycarbonate, polyethylene terephthalate, polyether sulfone, PMMA (acrylic), polyarylate, COP (cycloolefin polymer), COC (cycloolefin copolymer), etc. It is made of transparent resin material or glass.

Each of the first and second substrates 5 and 6 is formed in a substantially rectangular shape. A liquid crystal display (not shown) is arranged on the lower surface side of the first substrate 5 . In addition, when the second substrate 6 is made of a relatively hard material, the cover member 2 may not be provided. In such a case, the viewing area V may be provided by forming a substantially frame-shaped window frame portion 2 a on the second substrate 6 .

As shown in FIG. 8, on the upper surface of the first substrate 5, there are grooves 7 for embedding a conductive metal, which will be the material of the first thin wires 14, the connection terminals 16, the second thin wires 24, and the third thin wires 18, which will be described later. 7, . . . are formed. 8 shows the grooves 7, 7, . . . formed on the upper surface of the first substrate 5, the grooves 7, 7, . there is

(Sensor electrode)
As shown in FIGS. 2 to 4, the touch sensor 1 includes sensor electrodes 10, 10, . The sensor electrodes 10, 10, . . . The touch sensor 1 can detect a touch operation by a user's finger (object to be detected) touching the operation surface 2b through the sensor electrodes 10, 10, . That is, the touch sensor 1 has capacitive sensor electrodes 10, 10, . . . , and the sensor electrodes 10, 10, .

The transmission electrodes 11, 11, . . . are connected to a driving circuit (not shown). The transmission electrodes 11, 11, . . . are configured to radiate an electric field around by the drive circuit. . are formed on the upper surface of the first substrate 5, as shown in FIG. Each transmission electrode 11 has a long side extending in a substantially strip shape along the Y-axis direction in a plan view. The transmission electrodes 11, 11, . . . are arranged at intervals in the X-axis direction.

The receiving electrodes 12, 12, . . . are configured to receive electric fields radiated from the transmitting electrodes 11, 11, . 4, the receiving electrodes 12, 12, . . . are formed on the upper surface of the second substrate 6. As shown in FIG. Each receiving electrode 12 has a long side extending in a substantially strip shape along the X-axis direction in a plan view. The receiving electrodes 12, 12, . . . are spaced apart in the Y-axis direction. Each receiving electrode 12 is arranged so as to be substantially orthogonal to each transmitting electrode 11 with a gap therebetween in the vertical direction (see FIG. 2). That is, each receiving electrode 12 crosses each transmitting electrode 11 while being insulated from each transmitting electrode 11 .

Here, in the present embodiment, one end portion in the longitudinal direction of the transmitting electrode 11 positioned on the lower side of the paper surface of FIG. The other end portion side of the electrode 11 in the longitudinal direction is defined as the second end portion 10b of the sensor electrode 10 . Further, in the present embodiment, one longitudinal end portion of the receiving electrode 12 located on the left side of the paper surface of FIG. The second end 10b of the sensor electrode 10 is defined as the other end in the longitudinal direction. As for the receiving electrode 12, the first end portion 10a and the second end portion 10b may be configured to have a positional relationship that is left-right opposite to the positional relationship shown in FIG.

Next, as shown in FIGS. 5 and 6, each sensor electrode 10 includes a first mesh pattern 13. FIG. In this embodiment, the first mesh pattern 13 is formed in a mesh shape in which conductive first thin wires 14, 14, . . . Note that the first thin wires 14, 14, . . . may not be arranged at regular intervals.

Each first fine wire 14 is formed of a conductive layer M in which a conductive metal such as copper or silver is embedded in a groove 7 formed on the upper surface of the substrate 4 . It is desirable that the first fine line 14 is formed to have a width of, for example, 2 μm or less.

Each first thin wire 14 is connected to a connection terminal 16 which will be described later. Each first fine line 14 extends obliquely with respect to each of the X-axis direction and the Y-axis direction. Specifically, the first thin wire 14 intersects the connection terminal 16 so that its wire direction crosses the connection terminal 16 obliquely. The connection intersections between the first thin wires 14, 14, . are placed open.

The first mesh pattern 13 has a mesh structure in which a plurality of cells 15, 15, . Each cell 15 is formed in the shape of a parallelogram having the same size and two diagonal lines (not shown) having different lengths.

In this embodiment, each cell 15 is formed into a parallelogram, that is, a rhombus, with four sides of equal length. Each cell 15 is arranged so that the transverse diagonal line of the rhombus extends in the X-axis direction and the longitudinal diagonal line extends in the Y-axis direction.

(Connecting terminal)
As shown in FIGS. 5-7, each sensor electrode 10 has connection terminals 16,16. Each connection terminal 16 consists of a thin single wire extending along the X-axis direction or the Y-axis direction. This thin single wire extends continuously along the short side direction of the sensor electrode 10 . The connection terminal 16 is electrically connected to the first thin wires 14, 14, . In FIG. 7, the connection terminals 16 are hatched with dots in order to emphasize the connection terminals 16. As shown in FIG.

Each connection terminal 16 is arranged near the periphery of the view area V. As shown in FIG. Specifically, each connection terminal 16 is arranged at each position of the first end portion 10 a and the second end portion 10 b of the sensor electrode 10 . Each connection terminal 16 is connected to an end portion of the first mesh pattern 13 while crossing the first thin wires 14, 14, .

Each connection terminal 16 is configured as a conductive layer M in which a conductive metal such as copper or silver is embedded in a groove 7 formed on the upper surface of the substrate 4 . Each connection terminal 16 is desirably formed to have a width of 8 μm, for example.

(Wiring part)
As shown in FIGS. 2 to 4, the touch sensor 1 includes wiring portions 17, 17, . . . for electrically connecting the sensor electrodes 10, 10, . The wiring portions 17, 17, . . . are arranged outside the view area V (see FIG. 2).

As shown in FIG. 3 , one end of the wiring portion 17 formed on the upper surface of the first substrate 5 is electrically connected to the first end 10 a of the transmission electrode 11 . Also, the other end of the wiring portion 17 is electrically connected to the flexible wiring board 3 .

As shown in FIG. 4 , one end of the wiring portion 17 formed on the upper surface of the second substrate 6 is electrically connected to the first end 10 a or the second end 10 b of the receiving electrode 12 . Also, the other end of the wiring portion 17 is electrically connected to the flexible wiring board 3 .

As shown in FIG. 5, the wiring portion 17 is formed in a substantially ladder shape. Specifically, the wiring portion 17 is composed of a pair of conductive third thin wires 18 , 18 and at least one bridge portion 19 . Although not shown, each of the third thin wires 18, 18 and the bridge portion 19 is formed of a conductive layer in which a conductive metal such as copper or silver is embedded in a groove portion 7 formed on the upper surface of the substrate 4, similarly to the first thin wire 14. Configured as M. The line width of each third fine line 18 is desirably 2 to 8 μm, for example.

Each of the third thin wires 18 , 18 extends along the extending direction of the wiring portion 17 . The third thin wires 18, 18 are spaced apart from each other. The bridge portion 19 extends in a direction crossing each third thin wire 18 and is continuous with each third thin wire 18 . That is, the bridge portion 19 is arranged between the third thin wires 18 and 18 so as to bridge the third thin wires 18 and 18 .

Although not shown, the wiring portion 17 may have a configuration in which three or more third thin wires 18, 18, . . . Alternatively, the wiring portion 17 may be configured only by the pair of third thin wires 18 , 18 .

(Conductive part)
Next, as shown in FIGS. 5 to 7, the touch sensor 1 includes conductive portions 20,20. Each conductive portion 20 includes a rectangular region having a side length of 100 μm or more in plan view. Each conductive portion 20 is formed, for example, so that the width in the X-axis direction is smaller than the width in the X-axis direction of the sensor electrode 10 . 2 to 4, illustration of the conductive portions 20, 20, . . . is omitted.

Conductive portions 20 and 20 are configured as first and second conductive portions 21 and 22 . The first and second conductive parts 21 and 22 are arranged near the periphery of the view area V. As shown in FIG.

As shown in FIG. 5, the first conductive portion 21 is arranged on the first end portion 10a side of the sensor electrode 10 . The first conductive portion 21 is electrically connected to the connection terminal 16 located at the first end portion 10 a of the sensor electrode 10 while being connected to the connection terminal 16 . The wiring portion 17 is electrically connected to the first conductive portion 21 via the connection terminal 16 located at the first end portion 10 a of the sensor electrode 10 .

As shown in FIG. 6, the second conductive portion 22 is arranged on the second end portion 10b side of the sensor electrode 10 . The second conductive portion 22 is electrically connected to the connection terminal 16 located at the second end portion 10b of the sensor electrode 10 while being connected to the connection terminal 16 .

5 to 7 show the configuration in which the first and second conductive portions 21 and 22 are respectively arranged at the first end portion 10a and the second end portion 10b of the transmission electrode 11, but this is not the case. Similarly, the first and second conductive portions 21 and 22 are also arranged at the first end portion 10a and the second end portion 10b of the receiving electrode 12, respectively.

As shown in FIG. 7 , the conductive portion 20 has a second mesh pattern 23 . The second mesh pattern 23 is formed such that conductive second thin wires 24, 24, . . . The second thin wire 24 is configured as a conductive layer M in which a conductive metal such as copper or silver is embedded in a groove 7 formed on the upper surface of the substrate 4 (see FIG. 8). The second mesh pattern 23 is configured such that the arrangement density of the second fine lines 24, 24, . . . is higher than the arrangement density of the first fine lines 14, 14, .

As shown in FIG. 7, the second fine lines 24, 24, . The line width of each of thin lines 25a-25f is preferably about 8 μm. In FIG. 7, the thin lines 25a to 25f are hatched with dots in order to emphasize the thin lines 25a to 25f.

The fine lines 25a, 25a, . . . extend in the Y-axis direction. One end of each thin wire 25 a is connected to the connection terminal 16 . The thin wires 25a, 25a, . . . are spaced apart from each other in the X-axis direction. It is desirable that the distance between the thin wires 25a, 25a is approximately 8 μm.

The fine lines 25b, 25b, . . . extend in the X-axis direction. Each fine line 25b is continuous with each fine line 25a. The fine lines 25b, 25b, . . . are spaced apart from each other in the Y-axis direction. It is desirable that the distance between the thin wires 25b, 25b is approximately 8 μm.

The thin line 25c extends in the Y-axis direction. The fine wire 25c is arranged on the side opposite to the fine wires 25a, 25a, . The thin line 25c is continuous with the thin lines 25b, 25b, . Specifically, the thin wire 25c connects the ends of the thin wires 25b, 25b located opposite to the thin wires 25a, 25a, .

The fine lines 25d, 25d, . . . extend in the X-axis direction. Each fine line 25d is continuous with the fine lines 25a, 25a so as to bridge the fine lines 25a, 25a adjacent to each other in the X-axis direction. Also, the fine lines 25d, 25d located in the gap between the fine lines 25a, 25a and facing each other in the Y-axis direction are arranged with a predetermined interval (for example, 100 μm) from each other. On the other hand, with respect to thin lines 25d, 25d, ... continuous with the same thin line 25a, the thin lines 25d, 25d extending in directions opposite to each other in the X-axis direction and closest to each other in the Y-axis direction are spaced apart in the Y-axis direction. is arranged to be 50 μm, for example.

The fine lines 25e, 25e, . . . extend in the Y-axis direction. Each fine line 25e is continuous with the fine lines 25b, 25b in a state of bridging the fine lines 25b, 25b adjacent to each other in the Y-axis direction. The fine wires 25e, 25e located in the gap between the fine wires 25b, 25b and facing each other in the X-axis direction are arranged with a predetermined interval (for example, 100 μm) from each other. On the other hand, with respect to thin lines 25e, 25e, ... continuous with the same thin line 25b, thin lines 25e, 25e extending in opposite directions in the Y-axis direction and closest in the X-axis direction are spaced apart in the X-axis direction. is arranged to be 50 μm, for example.

The fine lines 25f, 25f extend in the Y-axis direction. The fine lines 25f, 25f are arranged with a space therebetween in the X-axis direction. One end of each thin wire 25 f is connected to the connection terminal 16 . The other end of each thin wire 25f is continuous with the thin wire 25b facing the connection terminal 16 in the Y-axis direction.

Here, the three thin wires 25a, 25a, . . . located on the right side of FIG. It is The thin wires 25 f and 25 f shown in FIG. 7 are arranged such that one end of each is located between the connection intersections X 2 and X 3 between the first thin wires 14 and 14 and the connection terminal 16 . In this way, the conductive portions 20, 20, . is configured to

[Action and effect of the embodiment]
As described above, in the touch sensor 1 , the conductive portion 20 (second conductive portion 22 ) is arranged at least on the second end portion 10 b side of the sensor electrode 10 . For this reason, for example, in an inspection process of the touch sensor 1, a resistance measuring device (not shown) is used to measure the conductive portion 20 (second conductive portion 22) and the conductive member (not shown) electrically connected to the flexible wiring board 3. It becomes possible to measure the resistance value between two points. When such a resistance value measurement is performed, it is possible to confirm at least the conduction state of the sensor electrode 10 (for example, the presence or absence of complete disconnection). Therefore, in the touch sensor 1 according to the embodiment of the present disclosure, it is possible to determine whether or not the electrical state including the sensor electrode 10 is normal. Furthermore, in the touch sensor 1, since each conductive part 20 is made of the second mesh pattern 23, it is difficult for the vicinity of the peripheral edge of the view area V to become dark, and a decrease in the transmittance of the view area V as a whole can be suppressed. .

The first conductive portion 21 is arranged on the first end portion 10 a side of the sensor electrode 10 , while the second conductive portion 22 is arranged on the second end portion 10 b side of the sensor electrode 10 . Therefore, it is possible to check the conduction state of only the sensor electrode 10 between two points of the first and second conductive parts 21 and 22 with the resistance measuring instrument. Furthermore, the wiring portion 17 is configured to be electrically connected to the first conductive portion 21 via the first end portion 10a of the sensor electrode 10 . Therefore, it is possible to check the conduction state of only the wiring portion 17 by the resistance measuring device between two points between the first conductive portion 21 and the conductive member. Therefore, it is possible to individually determine whether or not the electrical state of each of the sensor electrode 10 and the wiring portion 17 is normal.

Moreover, the conductive portion 20 is formed so as to include a rectangular region with a side length dimension of 100 μm or more. That is, for example, assuming that a measurement pin (not shown) provided in the above-described resistance measuring device is pressed against the conductive portion 20 in the inspection process of the touch sensor 1, the conductive portion 20 is set to the tip diameter of the measurement pin. It is formed in a range larger than (φ10 μm, for example). As a result, it is possible to accurately measure the resistance value of the conductive portion 20 .

Also, the conductive portion 20 is configured as a conductive layer M in which a conductive metal is embedded in the groove portion 7 of the substrate 4 . As a result, when a measurement pin (not shown) of the resistance measuring device is pressed against the conductive portion 20 in the inspection process of the touch sensor 1, the conductive portion 20 is prevented from being accidentally crushed by the measurement pin. Therefore, it is possible to stably measure the resistance value of the conductive portion 20 .

In addition, in the second mesh pattern 23 forming the conductive portion 20, the conductive second thin wires 24, 24, . . . cross each other. The second mesh pattern 23 is configured such that the arrangement density of the second fine lines 24, 24, . . . is higher than the arrangement density of the first fine lines 14, 14, . Accordingly, when the measurement pin is pressed against the conductive portion 20 in the inspection process of the touch sensor 1, the resistance value of the conductive portion 20 can be measured with high accuracy. Although the conductive portion 20 preferably has the above-described configuration, it may be configured by arranging conductive second thin wires 24, 24, . . .

In addition, the conductive portion 20 is such that at least two second thin wires 24, 24 are connected to the connection terminals between the connection intersections (for example, X1, X2 in FIGS. 5 to 7) of the first thin wires 14, 14 and the connection terminals 16. 16 to intersect. Thereby, the connection state between the sensor electrode 10 having the connection terminal 16 and the conductive portion 20 can be stabilized. Furthermore, since the area of the view area V is relatively widened by providing the connection terminal 16 made of a thin single wire, the conductive portions 20, 20 can be easily arranged near the periphery of the view area V. FIG.

[Modification 1 and Modification 2 of Embodiment]
The conductive part 20 is not limited to the forms shown in FIGS. 5 to 7, and may have forms such as those shown in FIGS. 9 and 10, for example.

9, the conductive portion 22 (20) is composed of fine wires 25b, 25b, . . . , fine wires 25c, 25c, fine wires 25e, 25e, . Specifically, the fine lines 25c, 25c are arranged with a gap in the X-axis direction. The thin wires 25b, 25b, . . . and the thin wires 25e, 25e, . The fine lines 25f, 25f, . . . are arranged at intervals in the X-axis direction. One end of each thin wire 25f (the end on the lower side of the paper surface of FIG. 9) is connected to the connection terminal 16. As shown in FIG. The other end of each thin line 25f (the end on the upper side of the paper surface of FIG. 9) is continuous with the thin line 25b.

10, the conductive portion 22 (20) is composed of fine wires 25b, 25b, . . . , fine wires 25c, 25c, and fine wires 25e, 25e, . Specifically, the fine lines 25c, 25c are arranged with a gap in the X-axis direction. The thin wires 25b, 25b, . . . and the thin wires 25e, 25e, . One end of each thin wire 25 e (the end on the lower side of the paper surface of FIG. 10 ) is connected to the connection terminal 16 . The other end of each thin line 25e (the end on the upper side of the paper surface of FIG. 10) is continuous with the thin line 25b.

[Modification 3 of Embodiment]
Further, in the above-described embodiment, the connecting terminal 16 is formed of a thin single wire, but the present invention is not limited to this form. For example, as shown in FIG. 11, the connection terminal 16 shown in the above embodiment may be divided into connection terminals 16a and 16b at an intermediate portion in the longitudinal direction (X-axis direction). A first conductive portion 21 is connected to the connection terminal 16a. The wiring portion 17 is connected to the connection terminal 16b.

[Other embodiments]
Although each of the first thin wire 14, the second thin wire 24, the third thin wire 18, and the connection terminal 16 is made of a conductive metal in each of the above-described embodiments, the shape is not limited to this. For example, each of the first thin wire 14, the second thin wire 24, the third thin wire 18, and the connection terminal 16 is made of a transparent conductive material (transparent conductive film) having light transmittance such as a conductive resin, indium tin oxide, tin oxide, or the like. may be configured with

Moreover, although each of the cells 15 formed in a rhombus shape is shown in each of the above-described embodiments, the shape is not limited to this shape. For example, each cell 15 may be formed as a parallelogram (ie, square or rectangle) with all four equal corners. Alternatively, each cell 15 may be formed as a parallelogram that is neither square, rhombus nor rectangular. The shape of each cell 15 is not limited to a square, and may be formed in an irregular shape or the like.

Further, in the above embodiment, the width of the conductive portion 20 in the X-axis direction is smaller than the width of the sensor electrode 10 in the X-axis direction, but the present invention is not limited to this. That is, the width of the conductive portion 20 in the X-axis direction may be larger than the width of the sensor electrode 10 in the X-axis direction. Moreover, the conductive portions 20 arranged according to the different sensor electrodes 10 are not limited to the same size and shape.

Moreover, in the above-described embodiment, the form having two substrates 4, 4 (the first substrate 5 and the second substrate 6) is shown, but the present invention is not limited to this form. That is, the touch sensor 1 may have a form in which only one substrate 4 (for example, the second substrate 6) is provided. In this embodiment, the sensor electrodes 10, 10, . . . , wiring portions 17, 17, . should be formed to Alternatively, the sensor electrodes 10, 10, .

Moreover, in the above-described embodiment, the form in which both the first and second conductive parts 21 and 22 are provided has been shown, but the present invention is not limited to this form. That is, in order to make it possible to determine whether or not the electrical state including the sensor electrode 10 is normal, the touch sensor 1 may be provided with only the second conductive portion 22 . That is, it may be determined whether or not the electrical state of the sensor electrode 10 and the wiring portion 17 is normal by measuring the resistance value between two points of the second conductive portion 22 and the conductive member. .

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 invention.

INDUSTRIAL APPLICABILITY The present disclosure is industrially applicable as a touch sensor type input device capable of performing touch operations.

1: Touch sensor 2: Cover member 3: Flexible wiring board 4: Substrate 5: First substrate 6: Second substrate 7: Groove 10: Sensor electrode 10a: First end 10b: Second end 11: Transmitting electrode 12 : Receiving electrode 13: First mesh pattern 14: First thin wire 15: Cell 16: Connection terminal 17: Wiring part 20: Conductive part 21: First conductive part 22: Second conductive part 23: Second mesh pattern 24: Second 2 thin lines V: view areas X1 to X3: connection intersections

Claims (4)

a sensor electrode having a first mesh pattern in which a plurality of electrically conductive first thin wires intersect with each other and formed in a substantially belt-like outer shape;
a wiring portion electrically connected to at least a first end portion side in the longitudinal direction of the sensor electrode for electrically connecting the sensor electrode to an external circuit;
and a conductive portion electrically conducting with the sensor electrode,
The conductive part has a second mesh pattern arranged on a second end side opposite to the first end of the sensor electrode ,
The second mesh pattern is formed by arranging a plurality of conductive second fine lines crossing each other,
The arrangement density of the plurality of second fine lines is higher than the arrangement density of the plurality of first fine lines in the first mesh pattern,
further comprising connection terminals at both the first end and the second end of the sensor electrode;
The plurality of first thin wires are connected to the connection terminal in a state in which the wire direction crosses the connection terminal so as to obliquely cross the connection terminal,
connection intersection points between the plurality of first thin wires and the connection terminal are arranged with a space therebetween in a longitudinal direction of the connection terminal;
The touch sensor , wherein the conductive portion is configured such that at least two of the second fine lines cross the connection terminals between the connection intersection points . The touch sensor according to claim 1, wherein
The conductive portion includes first and second conductive portions,
The first conductive portion is arranged on the first end side of the sensor electrode,
The second conductive portion is arranged on the second end side of the sensor electrode,
The touch sensor, wherein the wiring section is configured to be electrically connected to the first conductive section through the first end of the sensor electrode. The touch sensor according to claim 1 or 2,
The touch sensor, wherein the conductive portion is formed so as to include a substantially rectangular region with a side length dimension of 100 μm or more. In the touch sensor according to any one of claims 1 to 3,
Further comprising a substrate having a groove formed in a concave shape with respect to at least one surface,
The touch sensor, wherein the conductive portion is configured as a conductive layer in which a conductive material is embedded in the groove.

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