JP7380982B2 - touch sensor - Google Patents

Description

The present invention relates to a touch sensor.

2. Description of the Related Art Capacitive touch panel devices that read changes in the electric charge of sensor electrodes arranged in a matrix, for example, are used as input devices for various electronic devices. In a touch panel device, a touch panel having a switch screen displayed on the front side and a touch sensor having a plurality of sensor electrodes corresponding to the switches are arranged in an overlapping manner.

In recent years, proposals have been made to give a three-dimensional shape to a touch panel device, and in this case, it is desirable that the touch sensor itself is also bendable. As a related technology that makes it easy to bend a touch sensor into a three-dimensional shape, for example, Patent Document 1 discloses a main body in which a sensor electrode is formed on a base film made of resin, and a main body in which wiring extending from the sensor electrode is bundled. A touch sensor has been disclosed, which includes a tail part that protrudes from the part and has a terminal provided at the end thereof, and has a bent part formed by bending a base film to form a bent part in the tail part.

Re-table No. 2015-147323

2. Description of the Related Art Touch panel devices for use in vehicles, etc., have been developed in which graphic designs such as patterns and illustrations are applied to the touch panel in consideration of appearance and aesthetics. A touch panel with a graphic design has a structure in which a touch sensor is laminated on a cover panel with a graphic design. In a touch panel device having such a configuration, misalignment may occur between the pattern design provided on the cover glass and the sensor electrode of the touch sensor. If such positional misalignment occurs, there are concerns that the electrodes and wiring pattern provided on the touch sensor may become visible from the outside, resulting in an appearance defect, or the sensor electrode may not be pressed and an operation signal may not be transmitted, resulting in an operational defect. be done.

The present invention has been made in view of the above problems, and it is an object of the present invention to solve the problems in appearance and operation of a touch sensor.

One aspect of the present invention is a touch sensor including a sensor electrode and a wiring connected to the sensor electrode on a base film, in which a pattern portion is provided at least around the sensor electrode of the base film, and the wiring is connected to the sensor electrode. It is characterized by being arranged along the line part included in the pattern part.

According to one aspect of the present invention, the pattern portion is provided on the base film around the sensor electrode, and the wiring is arranged along the line portion included in the pattern portion, so that the sensor electrode and the wiring are connected to the pattern portion. Since positional displacement does not occur, it is possible to eliminate problems in appearance where the electrodes and wiring patterns become visible from the outside, and problems in operation where operation signals are not accurately transmitted via the sensor electrodes.

In one aspect of the present invention, the base film may be made of a translucent resin film. In this way, backlight illumination becomes possible at the location where the touch sensor is installed.

In one aspect of the present invention, at least one of the sensor electrode and the wiring may be made of a colored conductive layer having light-blocking properties. In this way, the resistance of the wiring can be reduced, so that the wiring can be made thinner.

In one aspect of the present invention, at least one of the sensor electrode and the wiring may be made of a transparent conductive layer. In this way, the sensor electrodes and the wiring can be made of transparent layers, so that the problem of appearance where the electrodes and the wiring pattern are visible can be solved.

In one aspect of the present invention, the pattern portion and the wiring may be made of the same material or the same color material. In this way, the pattern part can be drawn directly on the substrate film, so that misalignment between the pattern part and the wiring can be prevented.

In one aspect of the present invention, the base film includes a dummy wiring drawn as a thin line made of the same material or the same color as the wiring, and a line on which the wiring is not arranged among the line portions included in the pattern portion. It may also be arranged along the section. In this way, the wiring can be mixed with the dummy wiring, making it difficult to visually recognize it from the outside.

In one aspect of the present invention, the wiring may be a plurality of thin conductive wires connected from the sensor electrode, and each thin conductive wire may be provided at a predetermined interval. The predetermined interval between the sensor electrodes is preferably at least 3.6 mm when the conductive thin wire has a line width of 1 mm and the base film has a thickness of 3 mm. In this way, when operating the touch sensor with a fingertip, it is possible to reduce the risk of erroneously transmitting an operation signal due to touching a plurality of thin conductive wires with the fingertip at the same time.

In one aspect of the present invention, the pattern portion may be a continuous pattern provided around the sensor electrode, and the wiring may be arranged along line portions included in the pattern. In this way, misalignment between the line portions included in the pattern constituting the pattern and the wiring can be prevented, so that problems in appearance and in operation can be solved.

In one aspect of the present invention, the pattern portion may be an illustration including the sensor electrode, and the wiring may be arranged along the outline of the illustration. In this way, misalignment between the line portions included in the illustrations constituting the pattern portion and the wiring can be prevented, so that problems in appearance and in operation can be resolved.

As described above, according to the present invention, it is possible to suppress misalignment between the sensor electrode and the wiring and the pattern part, and eliminate problems in appearance and operation of the touch sensor.

1 is a plan view showing a schematic configuration of a touch sensor according to a first embodiment; FIG. FIG. 2 is an enlarged view of section A in FIG. 1. FIG. FIG. 7 is a plan view showing a schematic configuration of a touch sensor according to a second embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail. Note that this embodiment described below does not unduly limit the content of the present invention described in the claims, and all of the configurations described in this embodiment are essential as a solution to the present invention. Not necessarily.

(First embodiment)
First, an outline of the configuration of a touch sensor according to a first embodiment of the present invention will be described using FIGS. 1 and 2. FIG. 1 is a plan view showing a schematic configuration of a touch sensor according to a first embodiment, and FIG. 2 is an enlarged view of section A in FIG.

The touch sensor 100 is an input device that has a function of detecting a touch position in combination with a display device such as a touch panel, and is used, for example, as a capacitive touch panel sensor, and is placed over a transparent panel so that it can be visually recognized from the outside. It is now possible to do so. As shown in FIG. 1, the touch sensor 100 of this embodiment includes a plurality of sensor electrodes 102 on a base film 101, a plurality of wires 103 extending from each sensor electrode 102, and a plurality of wires 103 connected to one end of these wires 103. A terminal portion 104 is formed.

The touch sensor 100 is a main body part 105 that has a function of operating the part where a plurality of sensor electrodes 102 are formed by touching it with a finger or the like. On the other hand, in a region protruding from the main body part 105 in a band shape, the wiring 103 from the sensor electrode 102 is concentrated and connected to the terminal part 104 provided at the end, and connected to the circuit board to which the touch sensor 100 is connected. This becomes a tail portion 106 that has a connecting function. When looking at the touch sensor 100 structurally, both the main body part 105 and the tail part 106 are formed based on a single base film 101.

The base film 101 is the base material of the touch sensor 100, and if transparency is required, it is formed using a transparent resin film. The transparency required for the base film 101 is such that when a display portion is provided on the back surface of the touch sensor 100, this display portion can be visually recognized from the front surface of the touch sensor 100.

Since the resin film includes the wiring 102 and the sensor electrode 103, it is preferable that the resin film has some degree of rigidity. Examples of materials for such resin films include polyethylene terephthalate (PET) resin, polyethylene naphthalate (PEN) resin, polycarbonate (PC) resin, polymethyl methacrylate (PMMA) resin, polypropylene (PP) resin, and polyurethane (PU) resin. , polyamide (PA) resin, polyethersulfone (PES) resin, polyetheretherketone (PEEK) resin, triacetyl cellulose (TAC) resin, polyimide (PI) resin, cycloolefin polymer (COP), etc. can. In particular, in order to backlight the touch sensor 100, the base film 101 is preferably made of a translucent resin film such as polyethylene terephthalate (PET) resin or polycarbonate (PC) resin. .

The thickness of the base film 101 is preferably 10 to 300 μm in order to maintain the shape of the touch sensor 100. The base film 101 can also be surface-treated by providing a primer layer that increases adhesion to the conductive polymer, a surface protection layer, an overcoat layer for antistatic purposes, and the like.

The sensor electrode 102 has a function corresponding to a switch that is operated by touching with a finger or the like, and is made of a conductive layer containing conductive ink or a conductive polymer. If the sensor electrode 102 is made of a conductive polymer, a liquid coating solution can be formed and printed, and the sensor electrode 102 can be obtained at a lower cost than ITO or the like, which is preferable. On the other hand, when transparency is not required, the sensor electrode 102 can be formed using conductive ink such as silver ink or carbon paste. Silver ink is preferable because it can form the sensor electrode 102 with low resistance and excellent sensitivity. On the other hand, carbon paste is preferable because the sensor electrode 102 can be obtained at a lower cost than conductive polymers and because it has excellent weather resistance.

When the sensor electrode 102 is a transparent layer, a transparent conductive polymer is used. Examples of such conductive polymers include polyparaphenylene, polyacetylene, PEDOT-PSS (poly-3,4-ethylenedioxythiophene-polystyrene sulfonic acid), and the like.

The layer thickness of the sensor electrode 102 is preferably 0.04 μm to 1.0 μm, more preferably 0.06 μm to 0.4 μm. If the layer thickness is less than 0.04 μm, the resistance value of the sensor electrode 102 may increase, and if the layer thickness exceeds 1.0 μm, the transparency may decrease. Note that the layer thickness of the sensor electrode 102 can be measured by forming the sensor electrode 102 on the base film 101 and using an atomic force microscope (AFM).

The wiring 103 is drawn from the sensor electrode 102 to a terminal portion 104 at the tip of the tail portion 106, and conductively connects the sensor electrode 102 to a circuit board of an electronic device to be connected through the terminal portion 104. In this embodiment, the wiring 103 is composed of a plurality of thin conductive wires each having a line width equal to or less than a predetermined width. In this embodiment, the wiring 103 includes an upstream wiring 103a, a downstream wiring 103b, and a merging portion 103c, as shown in FIG.

As shown in FIG. 2, the upstream wiring 103a is provided as a plurality of conductive thin wires having a line width of, for example, 2 mm or less from one sensor electrode 102 toward the confluence part 103c, and each upstream wiring 103a is arranged at a predetermined interval. It is provided through. The plurality of upstream wirings 103a extend from one electrode 102, merge at a merging part 103c, and are connected to one downstream wiring 103b, and the downstream wiring 103b is connected to the tip side of the tail part 106. The terminal section 104 is connected to the terminal section 104 having the terminal section 104.

As the material for the wiring 103, it is preferable to use a conductive polymer for the upstream wiring 103a because it can be formed by printing a liquid coating and can be obtained at a lower cost than ITO or the like. When forming a transparent layer, a transparent conductive polymer is used. Examples of such conductive polymers include polyparaphenylene, polyacetylene, PEDOT-PSS (poly-3,4-ethylenedioxythiophene-polystyrene sulfonic acid), and the like. The material of the downstream wiring 103b is preferably formed from a conductive paste or conductive ink containing a highly conductive metal such as copper, aluminum, silver, or an alloy containing these metals. In particular, the downstream wiring 103b is preferably made of silver wiring because it has higher conductivity among the metals and alloys mentioned above and is more difficult to oxidize than copper. However, if the upstream wiring 103a is made of a colored light-shielding material such as silver, the upstream wiring 103a will not be transparent, so it is necessary to draw the upstream wiring 103a extremely thin to make it difficult to see from the outside. There is.

The thickness of the upstream wiring 103a is preferably 0.04 μm to 1.0 μm, more preferably 0.06 μm to 0.4 μm. If the thickness is less than 0.04 μm, the resistance value may become high, and if the thickness exceeds 1.0 μm, the transparency may become low. The thickness of the downstream wiring 103b is preferably 1.0 μm to 20 μm. If the thickness of the downstream wiring 103b is less than 1.0 μm, the resistance value of the wiring tends to increase, which may cause noise. On the other hand, if the thickness of the downstream wiring 103b exceeds 20 μm, the difference in level becomes large, which increases the possibility that air bubbles will be introduced when applying the resist layer to be laminated to the terminal portion 104, which is not preferable. Further, the resistance value of the wiring 103 (upstream wiring 103a, downstream wiring 103b) is preferably set to 300Ω or less in order to prevent noise from increasing and sensitivity from worsening.

Furthermore, in this embodiment, in order to be able to distinguish the sensitivity between the sensor electrode 102 and the wiring 103, it is preferable that the occupancy rate, expressed as the density per unit area of the wiring pattern, be dispersed to 20% or less. .

Further, in this embodiment, the upstream wiring 103a of the plurality of wirings 103 is arranged along a line part included in a pattern part 107 made of a continuous pattern made of the same material or the same color material as the wiring 103. . As shown in FIG. 2, the pattern portion 107 is formed on the substrate film 101 of the main body portion 105 in a continuous mesh pattern starting from the periphery of each sensor electrode 102. The plurality of upstream wirings 103a repeat branching and merging along the line portions included in the pattern of the symbol portion 107 to reach the merging portion 103c. In this embodiment, the same material or the same color material may be any material that is close to the extent that the difference in color is difficult to distinguish. For example, it is preferable that the color difference (ΔE*ab) is 13 or less, since this is a range in which it is difficult to distinguish the color difference with the naked eye. It is more preferable that the color difference (ΔE*ab) is 6.5 or less. Color difference (ΔE*ab) is defined as the distance between coordinates in the CIE1976 L*a*b* color space in accordance with JIS Z 8781-4. For example, the color difference can be determined using a handy spectrophotometer (“JX777” manufactured by Color Techno System Co., Ltd.) or a color difference meter (“CR-400” manufactured by Konica Minolta).

In addition, in this embodiment, as shown in FIG. 2, among the line portions in which the pattern portion 107 includes the dummy wiring 108 drawn as a thin line made of the same material or the same color as the upstream wiring 103a, the upstream wiring 103a is It is placed along a line that is not placed. In order to make it difficult for the upstream wiring 103a to be confused with the dummy wiring 108 and to be visually recognized from the outside, the dummy wiring 108 has an outer dummy wiring 108a on the outer periphery of the mesh pattern and an inner dummy wiring 108a on the inner periphery of the mesh pattern. and a side dummy wiring 108b.

The terminal portion 104 is provided at one end of the wiring 103 and is inserted into and removed from a connector provided on a circuit board as a separate member. Therefore, a terminal protective layer (not shown) that protects one end of the wiring 103 is provided on the surface of the wiring 103. It is set up and configured.

In this embodiment, in order to prevent conduction between the sensor electrodes 102 and protect the sensor electrodes 102 from ultraviolet rays, scratches, etc., transparent resin such as acrylic, urethane, epoxy, or polyolefin resin is used. A resist layer (not shown), which is an insulating film, is coated on the surfaces of the sensor electrode 102 and the wiring 103.

Next, the functions and effects of the touch sensor 100 of the first embodiment will be explained using the drawings.

In this embodiment, a pattern part 107 made of the same material or the same color material as the wiring 103 (upstream wiring 103a) is provided around the sensor electrode 102 of the base film 101, and the upstream wiring 103a of the wiring 103 is the pattern part 107. It is arranged along a line included in 107. That is, in this embodiment, the upstream wiring 103a is arranged on the substrate film 101 of the touch sensor 100 along the line part included in the continuous pattern of the pattern part 107 made of the same material or the same color material as the upstream wiring 103a of the wiring 103. It is now possible to do so.

In this way, by providing the pattern part 107 around the sensor electrode 102 of the base film 101 and arranging the wiring 103 along the line part included in the pattern part 107, the sensor electrode 102 and the wiring 103 are arranged in the pattern. There is no misalignment with the portion 107. Therefore, an appearance defect such as the position of the pattern of the sensor electrode 102 or the wiring 103 being visible from the outside due to the misalignment between the sensor electrode 102 and the wiring 103 and the pattern part 107 is eliminated. Further, since the pattern portion 107 made of the same material or the same color material as the wiring 103 can be directly drawn on the substrate film 101, misalignment between the pattern portion 107 and the wiring 103 can be easily prevented.

Furthermore, in this embodiment, there is no misalignment between the sensor arrangement drawn on the pattern section 107 and the sensor electrode 102 of the touch sensor 100, so that if the sensor drawn on the pattern section 107 is pressed, the sensor electrode 102 will continue to be pressed. Therefore, the operation signal caused by pressing the sensor electrode 102 is accurately transmitted, and operational problems can be resolved.

Furthermore, in this embodiment, the sensor electrode 102 and the wiring 103 are formed within the pattern design of the pattern portion 107 provided on the base film 101 by printing the wiring pattern and the pattern design together. Therefore, the position of the sensor electrode 102 can be easily aligned with the continuous pattern of the pattern part 107, and the number of printing steps can be reduced, so that it is possible to efficiently manufacture the touch sensor 100 that can eliminate problems in appearance and operation.

Further, in this embodiment, the wiring 103 is a plurality of thin conductive wires connected from the sensor electrode 102. As described in the related technology, when forming the wiring pattern of a touch sensor using a material with a high resistance value, it is necessary to make the wiring pattern thick to ensure conduction. The difference between the sensitivity when the fingertip touches the sensor electrode and the sensitivity when the fingertip touches the sensor electrode becomes small, and it becomes difficult to determine the ON/OFF threshold of the operation signal from the sensor electrode. Furthermore, when the wiring becomes thick, it becomes easier to see from the outside, resulting in problems in terms of appearance.

For this reason, in this embodiment, the wiring pattern for one sensor electrode 102 is divided into a plurality of thin lines and formed to form conductive thin lines. As a result, even if the wiring 103 made of a thin conductive wire is touched, the degree of reaction is lower than that of the sensor electrode 102, so that it is easier to distinguish between touching the sensor electrode 102 and solving operational problems.

Furthermore, in this embodiment, it is preferable that the plurality of wiring patterns for the same signal be arranged at a distance greater than the size of a fingertip. That is, each wiring 103 extending from one sensor electrode 101 is provided at a predetermined interval larger than the size of a fingertip.

In this way, it is preferable to arrange the plurality of wirings 103 extending from one sensor electrode 101 at a distance greater than a specific interval, since this can prevent the fingertip from straddling the plurality of wirings 103 and detecting both. That is, when operating the sensor electrode 102 of the touch sensor 100 by pressing it with a fingertip, it is possible to reduce the risk of erroneously transmitting an operation signal by touching a plurality of wirings 103 with the fingertip at the same time.

The lower limit value of the interval between each wiring 103 extending from one sensor electrode 101 is calculated from the relationship between equation (1) and equation (2) below. In other words, if the radius of the capacitor is r (mm), the thickness of the dielectric is d (mm), and the relative dielectric constant of the resin is ε _r , then with the condition that d<<r, a circular parallel plate including edge effects is formed. The total capacitance C of the capacitor is derived from equation (1) below for a circular capacitor.
C=(0.00885・ε _r・πr ² /d)+0.00885ε _r・r[ln(16πr/d)−1]...(1)

On the other hand, a general formula for calculating the capacitance C that ignores edge effects can be expressed by the following formula (2).
C=0.00885・ε _r・πr ² /d...(2)

Here, assuming that the line width is 1 mm and the plate thickness is 3 mm, the line is a collection of circles with a diameter of 1 mm, and the capacitance of one circle is considered. If the plate thickness is 3 mm, the capacitance value C is found to be 0.03065.

Next, by using equation (2) that ignores the edge effect, the radius r of the circle that is the same as the capacitance value C (0.03065) is found to be 0.887 mm. This means that a circular electrode with a diameter of 1 mm is equivalent to a circular electrode with a diameter of 1.774 mm, if edge effects are ignored.

Further, when line widths of 1 mm are arranged at a pitch of 1.774 mm, it can be regarded as a mass having the same sensitivity as one sensor electrode 102. Here, by halving the size of the lump, the sensitivity is also halved, and if there is a sensitivity difference of this size, it is possible to detect the difference between the pattern part and the sensor part, so the pitch of the wiring 103 can be doubled to 3.548 mm or more. It is necessary to

From this, when the wiring patterns are approximated to be parallel, it is found that the pitch of the wiring patterns needs to be 3.548 mm or more when the line width is 1 mm and the board thickness is 3 mm. That is, in this embodiment, when the line width of the wiring 103 is 1 mm and the thickness of the base film 101 is 3 mm, the interval between the wiring 103 made of a plurality of conductive thin wires extending from one sensor electrode 101 is at least 3 mm. It can be seen that it is preferable that the diameter is .6 mm or more.

Furthermore, in this embodiment, if at least either the sensor electrode 102 or the wiring 103 is a conductive layer made of a silver-based, carbon-based, etc. conductive paste and has a colored light-shielding property, the wiring 103 may be made thinner. Low resistance can be achieved. This is preferable because it makes it easier to transmit the operation signal from the sensor electrode 102 and makes it difficult for the wiring 103 to be visually recognized from the outside. However, if the wiring 103 is not transparent, it is necessary to draw the wiring 103 extremely thinly with a line width of about 1 mm in order to make it inconspicuous and difficult to see from the outside.

Furthermore, in this embodiment, when at least one of the sensor electrode 102 and the wiring 103 is formed from a transparent conductive layer such as a PEDOT-based organic transparent conductive layer, an ITO-based inorganic transparent conductive layer, or a silver nanowire-based transparent conductive layer, This makes it possible to solve the problem of appearance in which the patterns of the electrodes 102 and wiring 103 become visible from the outside. However, when using a transparent conductive layer such as a PEDOT-based conductive layer for the wiring 103, the resistance value is higher than that of a silver-based conductive layer, so in order to make the wiring 103 thin while ensuring high conductivity, It is necessary to increase the number of wires 103 extending from one sensor electrode 101.

(Second embodiment)
Next, an outline of the configuration of a touch sensor according to a second embodiment of the present invention will be described using FIG. 3. Note that FIG. 3 shows only the essential parts of the main body, and omits the illustration of the tail that projects from the main body in a band shape.

Similar to the first embodiment, the touch sensor 200 of this embodiment includes a plurality of sensor electrodes 202 on a substrate film 201, wiring 203 extending from each sensor electrode 202, a pattern part 207, and a dummy wiring 208. have However, the touch sensor 200 of this embodiment differs from the first embodiment in the form of the pattern portion 207 and the arrangement of the wiring 203.

That is, the present embodiment is characterized in that the pattern portion 207 is an illustration including the sensor electrode 202, and the wiring 203 is arranged along any of the outlines of the illustration. Specifically, as shown in FIG. 3, the pattern portion 207 formed on the substrate film 201 is represented by a flower illustration, and the flower illustration 207a corresponding to the sensor electrode 202 and other flowers that are dummy drawings are shown. The color of the leaf illustration 207b and the leaf illustration 207c are different.

A wiring 203 extending from the sensor electrode 202 is arranged along the outline of another flower illustration 207b. On the other hand, the dummy wiring 208 is arranged along a line portion of the outline of the other flower illustration 207b where the wiring 203 is not arranged. Note that in this embodiment, as shown in FIG. 3, one wire 203 extends from each sensor electrode 202, but two or more wires 203 extend from each sensor electrode 202. Good too.

Illustrations 207a and 207b of petal-shaped portions included in the pattern portion 207 are formed into planar shapes using a transparent conductive material such as PEDOT, and serve as the sensor electrode 202 and another dummy pattern 208a. The outlines of illustrations 207a and 207b are formed into lines using a conductive material such as silver paste to form wiring 203 and dummy wiring 208.

The sensor electrode 202 and the wiring 203 are placed apart from each other at a predetermined interval via an electrically insulating portion so as not to contact the surrounding dummy pattern and outline. In this way, in this embodiment, conduction between adjacent sensor electrodes 202 or wirings 203 is avoided.

In this manner, in this embodiment, the sensor electrode 202 and the wiring 203 are arranged within the pattern portion 207 consisting of a pattern and an outline. Therefore, misalignment between the line portions included in the illustrations 207a and 207b constituting the pattern portion 207 and the wiring 203 is prevented, so that the sensor electrode 202 and the wiring 203 are prevented from being visually recognized from the outside, and the sensor electrode Operational problems caused by the positional deviation of 202 can be resolved.

Note that in each of the embodiments described above, a touch sensor is described in which wiring is arranged along a line part included in a pattern part provided around a sensor electrode of a base film, but the present invention The touch sensor according to one embodiment can be applied even when there is no pattern part.

That is, in this embodiment, in a touch sensor that includes a sensor electrode and wiring connected to the sensor electrode on a base film, when extending a plurality of conductive wires from the sensor electrode on the base film, the wiring for one sensor electrode is By dividing the pattern into multiple thin lines and forming them into conductive thin lines, it is possible to reduce problems in appearance, make it easier to distinguish from touching the sensor electrode, and eliminate operational problems. . In addition, when extending multiple conductive wires from one sensor electrode, each wire should be placed at a certain distance or more apart in order to prevent operational problems where the fingertip straddles multiple wires and detects both. is preferred.

Although each embodiment of the present invention has been described in detail as above, those skilled in the art will easily understand that many modifications can be made without substantively departing from the novelty and effects of the present invention. It will be possible. Therefore, all such modifications are included within the scope of the present invention.

For example, a term that appears at least once in the specification or drawings together with a different term with a broader or synonymous meaning may be replaced by that different term anywhere in the specification or drawings. Further, the configuration and operation of the touch sensor are not limited to those described in each embodiment of the present invention, and various modifications are possible.

100, 200 Touch sensor 101, 201 Substrate film 102, 202 Sensor electrode 103, 203 Wiring 103a Upstream wiring 103b Downstream wiring 103c Merging section 104 Terminal section 105 Main body section 106 Tail section 107, 207 Pattern section 108, 208 Dummy wiring

Claims (10)

In a touch sensor including a sensor electrode and wiring connected to the sensor electrode on a base film,
At least the base film is formed with a pattern portion provided around the sensor electrode as a pattern design that is visible from the outside and takes aesthetics into consideration ;
The touch sensor is characterized in that the wiring is arranged along any of the line parts included in the pattern part. In a touch sensor including a sensor electrode and wiring connected to the sensor electrode on a base film,
A pattern portion is provided at least around the sensor electrode of the base film, and the wiring is arranged along a line portion included in the pattern portion,
The wiring is a plurality of conductive thin wires connected from the sensor electrode, and each conductive thin wire is provided at a predetermined interval,
The touch sensor is characterized in that the predetermined interval is at least 3.6 mm or more when the conductive thin wire has a line width of 1 mm and the base film has a thickness of 3 mm. The touch sensor according to claim 1 or 2, wherein the base film is made of a translucent resin film. The touch sensor according to any one of claims 1 to 3, wherein at least one of the sensor electrode and the wiring is formed of a colored conductive layer having a light-shielding property. The touch sensor according to any one of claims 1 to 4 , wherein at least one of the sensor electrode and the wiring is made of a transparent conductive layer. The touch sensor according to any one of claims 1 to 5, wherein the pattern portion and the wiring are made of the same material or the same color material. On the base film, dummy wiring drawn with thin lines made of the same material or the same color as the wiring is arranged along the line parts where the wiring is not arranged among the line parts constituting the pattern part. The touch sensor according to any one of claims 1 to 6 . The touch sensor according to any one of claims 1 to 7, wherein the wiring and the pattern portion are made of a printed material. 9. The pattern portion is a continuous pattern provided around the sensor electrode, and the wiring is arranged along line portions included in the pattern. touch sensor. The touch sensor according to any one of claims 1 to 8, wherein the pattern portion is an illustration including the sensor electrode, and the wiring is arranged along the outline of the illustration.

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