JP2022010746A - Electrode member for touch panel, touch panel, and image display apparatus - Google Patents

Abstract

To provide an electrode member for a touch panel configured to prevent moire when the member is used in an image display apparatus, a touch panel, and an image display apparatus.SOLUTION: An electrode member for a touch panel includes a plurality of unit mesh patterns (MP3) arranged by a plurality of first thin metal wires (MW1, MW3) extending in a first direction (D1) and a plurality of second thin metal wires (MW2, MW4) extending in a second direction, which intersect with each other, in a plan view. A straight line (L1) connecting center points (C1, C2) of two unit mesh patterns (MP3) adjacent to each other in the first direction (D1) extends in a direction (D3) intersecting with the first direction (D1). A straight line connecting center points of two unit mesh patterns (MP3) adjacent to each other in the second direction extends in a direction intersecting with the second direction.SELECTED DRAWING: Figure 6

Description

The present invention relates to an electrode member for a touch panel used as an electrode of a touch sensor or a touch panel.
The present invention also relates to a touch panel including an electrode member for a touch panel.
The present invention also relates to an image display device including a touch panel.

In recent years, it has been used in various electronic devices such as tablet computers and mobile information devices such as smartphones in combination with display devices such as liquid crystal displays, and can be electronically contacted or brought close to the screen by a finger, stylus pen, or the like. Touch panels that perform input operations to devices are becoming more widespread.

For the touch panel, a conductive member in which a detection unit for detecting a touch operation due to contact or proximity of a finger, a stylus pen, or the like is formed on a transparent substrate is used.
The detection unit is formed of a transparent conductive oxide such as ITO (Indium Tin Oxide), but is also formed of a metal other than the transparent conductive oxide. Compared to the above-mentioned transparent conductive oxide, metal has advantages such as easy patterning, excellent flexibility, and lower resistance. Therefore, a metal such as copper or silver is used for the conductive thin wire in a touch panel or the like. ing.

Patent Document 1 describes a touch panel in which a detection electrode made of a plurality of fine metal wires is arranged on a transparent substrate. The detection electrode has a plurality of first metal wires extending along the first direction and a plurality of second metal wires extending along a second direction different from the first direction, and the detection electrode has a plurality of first metal wires. A plurality of diamond-shaped mesh patterns are formed by the thin wire and the plurality of second metal thin wires. Further, the plurality of first metal thin wires are arranged so as to be displaced in the second direction on both sides of the intersection with the second metal thin wire.

U.S. Patent Application Publication No. 2014/0216783

By the way, when a touch panel having a plurality of regular mesh patterns made of fine metal lines is arranged on a liquid crystal display or the like for displaying an image and used as an image display device, the plurality of regular mesh patterns are used. And the pixel pattern of the liquid crystal display or the like interfere with each other, so that so-called moire may be noticeably visually recognized.

In the touch panel of Patent Document 1, since the plurality of first metal fine wires are arranged while being displaced in the second direction, which is the direction in which the plurality of second metal fine wires extend, the arrangement of the plurality of mesh patterns of the detection electrodes is irregular. It is expected that sex will be imparted and moire will be reduced. However, since the plurality of second metal wires are arranged at equal intervals in the first direction in which the plurality of first metal wires extend, the plurality of mesh patterns are regularly arranged along the second direction. Still, it was easy for the multiple mesh patterns of the detection electrodes to interfere with the pixel patterns of the liquid crystal display and the like. Therefore, when the touch panel of Patent Document 1 is used as an image display device, moire may be noticeably visually recognized, and there is room for improvement.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an electrode member for a touch panel capable of suppressing the occurrence of moire when used in an image display device. ..
It is also an object of the present invention to provide a touch panel using such a touch panel electrode member.
It is also an object of the present invention to provide an image display device using such a touch panel.

In the electrode member for a touch panel according to the present invention, in a plan view, a plurality of first metal wires extending in the first direction and a plurality of second metal wires extending in the second direction intersecting each other intersect with each other. An electrode member for a touch panel having a plurality of unit mesh patterns laid out by the above, and a straight line connecting the center points of two unit mesh patterns adjacent to each other in the first direction is in a direction intersecting with the first direction. The straight line extending and connecting the center points of the two unit mesh patterns adjacent to each other in the second direction is characterized in that it extends in a direction intersecting with the second direction.

A straight line connecting the center points of two unit mesh patterns adjacent to the first direction intersects the first direction at an angle of 0.1 degrees or more and 2.9 degrees or less, and is adjacent to the second direction. It is preferable that the straight line connecting the center points of the two unit mesh patterns intersects the second direction at an angle of 0.1 degrees or more and 2.9 degrees or less.

Further, the unit mesh pattern preferably has a rhombic shape.
In this case, the length of one side of the unit mesh pattern is preferably 150 μm or more and 350 μm or less.
The first metal thin wire and the second metal thin wire preferably have a line width of 1 μm or more and 10 μm or less.
Further, it is preferable that the first metal wire and the front second metal wire are made of copper.

The electrode member for the touch panel may further include a transparent insulating member, in which case the first metal wire and the second metal wire can be arranged on both sides of the transparent insulating member, respectively.
In this case, the transparent insulating member can be made of a resin substrate.

Further, the electrode member for the touch panel may further include a resin substrate, in which case the first metal wire, the second metal wire and the transparent insulating member can be arranged on one surface of the resin substrate. ..
Further, the electrode member for the touch panel may further include a glass substrate, in which case the first metal wire, the second metal wire and the transparent insulating member can be arranged on one surface of the glass substrate. ..

The touch panel according to the present invention is characterized by including the above-mentioned electrode member for a touch panel.
The image display device according to the present invention is characterized by including the above-mentioned touch panel.

According to the present invention, a straight line connecting the center points of two unit mesh patterns adjacent to each other in the first direction extends in a direction intersecting the first direction, and the two unit mesh patterns adjacent to each other in the second direction. Since the straight line connecting the respective center points of the above extends in a direction intersecting with the second direction, it is possible to suppress the occurrence of moire when used in an image display device.

It is a partial cross-sectional view of the touch panel in Embodiment 1 of this invention. It is a top view of the electrode member for a touch panel which concerns on Embodiment 1. FIG. It is a partially enlarged plan view of the 1st electrode in Embodiment 1. FIG. It is a partially enlarged plan view of the 2nd electrode in Embodiment 1. FIG. It is a partially enlarged plan view of the electrode member for a touch panel which concerns on Embodiment 1. FIG. FIG. 3 is a partially enlarged plan view of two third unit mesh patterns adjacent to each other in the first direction. FIG. 3 is a partially enlarged plan view of two third unit mesh patterns adjacent to each other in the second direction. It is a partial cross-sectional view of the image display device in Embodiment 1. FIG. It is a partial cross-sectional view of the touch panel in Embodiment 2. FIG. It is a partial cross-sectional view of the electrode member for a touch panel which concerns on Embodiment 3. FIG.

Hereinafter, the electrode member for a touch panel, the touch panel, and the image display device according to the present invention will be described in detail based on the preferred embodiment shown in the attached drawings.
In the following, the notation "-" indicating the numerical range shall include the numerical values described on both sides. For example, "s is a numerical value t1 to a numerical value t2" means that the range of s is a range including the numerical values t1 and the numerical value t2, and is t1 ≦ s ≦ t2 in mathematical symbols.
Angles, including "orthogonal" and "parallel", shall include error ranges generally acceptable in the art, unless otherwise stated.
"Transparent" means that the light transmittance is at least 40% or more, preferably 75% or more, more preferably 80% or more, still more preferably more preferably in the visible light wavelength range of a wavelength of 400 nm to 800 nm. It is more than 90%. The light transmittance is measured by using "Plastic--How to determine the total light transmittance and the total light reflectance" specified in JIS K 7375: 2008.

Embodiment 1
FIG. 1 shows the configuration of the touch panel 1 according to the first embodiment of the present invention.
The touch panel 1 has a front surface 1A and a back surface 1B, and is used in a state where a display module (not shown) having a liquid crystal display or the like is arranged on the back surface 1B side. The surface 1A of the touch panel 1 is a touch detection surface, and is a visual side for an operator of the touch panel 1 to observe an image displayed on the display module through the touch panel 1.
The touch panel 1 has a transparent insulating cover panel 2 arranged on the surface 1A side, and the touch panel electrode member 3 is bonded to the surface of the cover panel 2 on the opposite side of the surface 1A by a transparent adhesive 4. Has been done.

The electrode member 3 for the touch panel includes a transparent insulating substrate 5, a second electrode layer 6B formed and patterned on the transparent insulating substrate 5, a transparent insulating member 7B formed on the second electrode layer 6B, and transparent insulation. It has a first electrode layer 6A arranged and patterned so as to overlap the second electrode layer 6B via a member 7B. As the transparent insulating substrate 5, a resin substrate, a glass substrate, or the like is used. The transparent insulating member 7B functions as an insulating layer that electrically insulates the first electrode layer 6A and the second electrode layer 6B from each other. Further, as shown in FIG. 1, a transparent insulating member 7A may be arranged so as to cover the first electrode layer 6A for the purpose of protecting the flattened or patterned first electrode layer 6A.

FIG. 2 shows a plan view of the touch panel electrode member 3. The touch panel electrode member 3 is provided with a transmission region S1 for detecting a touch operation with a finger, a stylus pen, or the like, and peripheral wiring or the like for connecting the touch panel electrode member 3 to a display module (not shown). The peripheral region S2, which is a region outside the transmission region S1, is partitioned. In FIG. 2, the transparent insulating member 7A is omitted in order to clearly show the configuration of the touch panel electrode member 3.

The first electrode layer 6A and the second electrode layer 6B are patterned with electrodes for detecting a touch operation and peripheral wiring connected to the electrodes. Of the first electrode layer 6A and the second electrode layer 6B, the first electrode layer 6A located on the cover panel 2 side, that is, on the visual recognition side, each extends along a certain direction and is orthogonal to the first electrode layer 6A. It has a plurality of first electrodes 11 arranged at intervals. Each of these plurality of first electrodes 11 has a first pad 12 at the end.

Further, the first electrode layer 6A has a plurality of first peripheral wirings 13 drawn from the plurality of first pads 12 of the plurality of first electrodes 11 and a plurality of connected to each of the plurality of first peripheral wirings 13. It has a first external connection terminal 14.

The second electrode layer 6B located on the display module side (not shown) extends along a direction orthogonal to the direction in which the plurality of first electrodes 11 extend, and extends in a direction orthogonal to the direction, that is, in a direction in which the plurality of first electrodes 11 extend. It has a plurality of second electrodes 21 arranged at intervals. Each of these plurality of second electrodes 21 has a second pad 22 at the end.

Further, the second electrode layer 6B has a plurality of second peripheral wirings 23 drawn from the plurality of second pads 22 of the plurality of second electrodes 21 and a plurality of connected to each of the plurality of second peripheral wirings 23. It has a second external connection terminal 24.

Here, the plurality of first electrodes 11 of the first electrode layer 6A and the plurality of second electrodes 21 of the second electrode layer 6B are arranged in the transmission region S1 partitioned by the touch panel electrode member 3.
Further, a plurality of first pads 12 of the first electrode layer 6A, a plurality of first peripheral wirings 13, a plurality of first external connection terminals 14, a plurality of second pads 22 of the second electrode layer 6B, and a plurality of second peripherals. The wiring 23 and the plurality of second external connection terminals 24 are arranged in the peripheral region S2 partitioned by the touch panel electrode member 3.

FIG. 3 shows a partially enlarged plan view of the first electrode 11 in the intersection region R where the first electrode 11 and the second electrode 21 overlap each other.
The first electrode 11 has a plurality of first metal wire MW1 extending along the first direction D1 and a plurality of second metal wire MW2 extending along the second direction D2 intersecting the first direction D1 in a plan view. Have. Each of the plurality of first metal thin wires MW1 extends along the first direction D1 and sequentially displaces in a certain direction different from the first direction D1 via the first bending portion BP1 while adjoining the first metal. It is connected to the thin wire MW1.
On the other hand, the plurality of second metal thin wires MW2 extend along the second direction D2, respectively, and sequentially displace in a certain direction different from the second direction D2 via the second bent portion BP2, and are adjacent to each other. 2 It is connected to the thin metal wire MW2.

The first bent portion BP1 and the second bent portion BP2 overlap at the intersection CP1 and become one, so that the plurality of first metal thin wires MW1 and the plurality of second metal thin wires MW2 intersect at the intersection CP1 and are electrically connected to each other. A plurality of first unit mesh patterns MP1 having a substantially rhombic shape are formed by being surrounded by four intersection points CP1.

The first unit mesh pattern MP1 has two first side members SP1 facing in a direction orthogonal to the first direction D1 and two second side members SP2 facing in a direction orthogonal to the second direction D2. The two first side members SP1 and the two second side members SP2 are connected to each other at four intersection points CP1.
Each first side member SP1 has two first metal wire wires MW1 adjacent to each other and connected via a first bent portion BP1, and each second side member SP2 is adjacent to each other and has a second. It has two second metal thin wires MW2 connected via two bent portions BP2.

FIG. 4 shows a partially enlarged plan view of the second electrode 21 in the intersection region R.
The second electrode 21 has a plurality of first metal wire MW3 extending along the first direction D1 and a plurality of second metal wire MW4 extending along the second direction D2 in a plan view. The first metal thin wire MW3 and the second metal thin wire MW4 are drawn by dotted lines for the sake of clarity in FIG. 4, but in reality, the first metal thin wire MW1 and the second metal thin wire MW2 in the first electrode 11 It is also composed of continuous thin metal wires. Each of the plurality of first metal thin wires MW3 extends along the first direction D1, and sequentially displaces in a certain direction different from the first direction D1 via the first bending portion BP3, and is adjacent to the first metal. It is connected to the thin wire MW3.
On the other hand, the plurality of second metal thin wires MW4 extend along the second direction D2, respectively, and sequentially displace in a certain direction different from the second direction D2 via the second bent portion BP2, and are adjacent to each other. 2 It is connected to a thin metal wire MW4.

The first bent portion BP3 and the second bent portion BP4 overlap at the intersection CP2 and become one, so that the plurality of first metal thin wires MW3 and the plurality of second metal thin wires MW4 intersect at the intersection CP2 and are electrically connected to each other. A plurality of second unit mesh patterns MP2 having a substantially rhombic shape are formed by being surrounded by four intersection points CP2.

The second unit mesh pattern MP2 has two first side members SP3 facing in a direction orthogonal to the first direction D1 and two second side members SP4 facing in a direction orthogonal to the second direction D2. The two first side members SP3 and the two second side members SP4 are connected to each other at four intersection points CP2.
Each first side member SP3 has two first metal wire wires MW3 adjacent to each other and connected via a first bent portion BP3, and each second side member SP4 is adjacent to each other and has a first. It has two second metal thin wires MW4 connected via two bent portions BP2.

FIG. 5 shows a partially enlarged plan view of the touch panel electrode member 3 in the intersection region R.
In the touch panel electrode member 3, the first electrode 11 and the second electrode 21 are combined with each other to form a plurality of third unit mesh patterns MP3. In FIG. 5, the second electrode 21 is drawn with a dotted line for the sake of clarity, but like the first electrode 11, it is actually composed of continuous thin metal wires.

Here, as an example of the first embodiment, in FIG. 5, the first unit mesh pattern MP1 and the second unit mesh pattern MP2 have the same shape as each other, and the intersection CP1 in the first unit mesh pattern MP1 is the second unit. The first unit mesh pattern MP1 and the second unit mesh pattern MP2 overlap each other so that they overlap the center of gravity of the mesh pattern MP2 and the intersection CP2 in the second unit mesh pattern MP2 overlaps the center of gravity of the first unit mesh pattern MP1. They are arranged out of alignment.

As a result, the first bent portion BP1 of the first electrode 11 and the second bent portion BP4 of the second electrode 21 overlap each other, and the second bent portion BP2 of the first electrode 11 and the first bent portion BP3 of the second electrode 21 are formed. It overlaps with each other. Further, the first metal wire MW1 of the first electrode 11 and the second metal wire MW4 of the second electrode 21 overlap at the intersection CP3, and the second metal wire MW2 of the first electrode 11 and the first metal wire MW3 of the second electrode 21 are overlapped. Overlap each other at the intersection CP4.

In this way, the first unit mesh pattern MP1 and the second unit mesh pattern MP2 overlap each other at the intersection points CP3 and CP4, so that the third unit mesh pattern MP3 is the first metal thin wire MW1 and the second metal thin wire of the first electrode 11. It consists of the first metal wire MW3 and the second metal wire MW4 of the MW2 and the second electrode 21, and the intersection CP1 in the first electrode 11, the intersection CP2 in the second electrode 21, and the first electrode 11 and the second electrode 21. It has a diamond-shaped shape surrounded by two intersections CP3 and CP4 formed by overlapping with each other. Further, the intersection points CP1 to CP4 are arranged at the positions of the four vertices of the rhombus, respectively. In the example of FIG. 5, the third unit mesh pattern MP3 has an area of about 1/4 of the first unit mesh pattern MP1 and the second unit mesh pattern MP2.

FIG. 6 shows a partially enlarged plan view of two third unit mesh patterns MP3 adjacent to the first direction D1.
The straight line L1 connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 extends along the direction D3 that intersects the first direction D1 at the intersection angle B1. Here, the center points C1 and C2 of the third unit mesh pattern MP3 are, for example, each other among the first metal thin wires MW1 and MW3 and the second metal thin wires MW2 and MW4 corresponding to the four sides of the third unit mesh pattern MP3. It can be defined as an intersection of a line segment connecting the midpoints of the first metal thin wires MW1 and MW3 facing each other and a line segment connecting the midpoints of the second metal thin wires MW2 and MW4 facing each other.

As described above, since the straight line L1 connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 extends along the direction D3 intersecting the first direction D1, for example, FIG. As shown in the above, the two third unit mesh patterns MP3 adjacent to the first direction D1 are arranged so as to be offset from each other by a certain distance in a direction different from that of the first direction D1.

Further, the first metal wire MW1 and the second metal wire MW2 of the first electrode 11 and the first metal wire MW3 and the second metal wire MW4 of the second electrode 21 have a line width W. The line width W is preferably 1 μm or more and 10 μm or less from the viewpoint of making it difficult for the observer of the touch panel electrode member 3 to visually recognize the first metal thin wires MW1 and MW3 and the second metal thin wires MW2 and MW4.
Further, the lengths K1 of the first metal thin wires MW1 and MW3 and the second metal thin wires MW2 and MW4 corresponding to the four sides of the third unit mesh pattern MP3 are provided to the observer of the touch panel electrode member 3 for the third unit mesh pattern MP3. From the viewpoint of making it difficult to see, it is preferably 150 μm or more and 350 μm or less.
For the line width W and length K1 of the first metal wire MW1, MW3 and the second metal wire MW2, MW4, the values measured using an optical microscope (Keyence digital microscope VHX-7000) are used. ..

FIG. 7 shows a partially enlarged plan view of two third unit mesh patterns MP3 adjacent to the second direction D2.
The straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 extends along the direction D4 intersecting the second direction D2 at the intersection angle B2. Here, the center points C3 and C4 of the third unit mesh pattern MP3 are the first metal thin wires MW1, MW3 and the second metal corresponding to the four sides of the third unit mesh pattern MP3 in the same manner as the center points C1 and C2. Of the thin wires MW2 and MW4, as an intersection of a line segment connecting the midpoints of the first metal thin wires MW1 and MW3 facing each other and a line segment connecting the midpoints of the second metal thin wires MW2 and MW4 facing each other. Each can be defined.

As described above, since the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 extends along the direction D4 intersecting the second direction D2, for example, FIG. 7 As shown in the above, the two third unit mesh patterns MP3 adjacent to the second direction D2 are arranged so as to be offset from each other by a certain distance in a direction different from that of the first direction D1.

Therefore, in the touch panel electrode member 3 of the first embodiment, the plurality of third unit mesh patterns MP3 are not arranged along the first direction D1 and the second direction D2, but are arranged irregularly. Have.

Here, the touch panel 1 provided with the touch panel electrode member 3 of the first embodiment is arranged on the display module 8 for displaying an image, for example, as shown in FIG. 8, whereby the image display device 9 Is configured. In FIG. 8, the display module 8 is adhered to the back surface 1B of the touch panel 1 with a transparent adhesive 4A. Further, although not shown in detail, the display module 8 includes a display screen such as a liquid crystal display, a controller for controlling the display of an image on the display screen, and the like. The operator of the image display device 9 visually recognizes the image displayed on the display module 8 through the touch panel 1, and performs a touch operation via the touch panel 1 based on the visually recognized image.

Generally, in such an image display device, moire may occur due to interference between the pixel pattern of the display module and a plurality of mesh patterns formed by the fine metal wires constituting the sensor of the touch panel. In the conventional technique, for example, moire is reduced by reducing the size of a plurality of mesh patterns, but as the size of the mesh pattern is reduced, the parasitic capacitance in the sensor increases and the sensitivity to touch operation decreases. I tended to do it.

In the touch panel electrode member 3 of the first embodiment, the straight line L1 connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 intersects the first direction D1 along the direction D3. A plurality of third units because the straight line L3 extending and connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 extends along the direction D3 intersecting the second direction D2. The arrangement of the mesh pattern MP3 has irregularities. Due to this irregularity, for example, the touch panel electrode member 3 does not have to reduce the size of the plurality of first unit mesh patterns MP1 in the first electrode 11 and the plurality of second unit mesh patterns MP2 in the second electrode 21. Moire generated when used in the image display device 9 can be reduced.

From the viewpoint of reducing moire, the crossing angle B1 between the straight line L1 connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 and the first direction D1 is 0. It is preferably 1 degree or more and 2.9 degrees or less. From the same viewpoint, the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 is 0.1 degree. It is preferably more than that and 2.9 degrees or less. Here, as the crossing angles B1 and B2, the values measured using an optical microscope (Keyence digital microscope VHX-7000) are used.

Further, as shown in FIG. 3, the first electrode 11 is composed of a continuous first metal wire MW1 and a continuous second metal wire MW2, but the first electrode 11 is formed in a direction in which the first electrode 11 extends. If both ends are electrically conductive with each other, the first metal wire MW1 and the second metal wire MW2 have a disconnection portion at a position where they overlap the first metal wire MW3 and the second metal wire MW4 of the second electrode 21. Can have. As a result, the intersection of the first metal wire MW1 and the second metal wire MW2 of the first electrode 11 and the first metal wire MW3 and the second metal wire MW4 of the second electrode 21 can be made difficult to see.

Further, for the same reason, if both ends of the second electrode 21 are electrically conductive with each other in the direction in which the second electrode 21 extends, the first metal wire MW3 and the second metal wire MW4 of the second electrode 21 are electrically connected to each other. Can have a disconnection portion at a position where the first electrode 11 overlaps with the first metal wire MW1 and the second metal wire MW2.

Embodiment 2
In the first embodiment, the first electrode layer 6A and the second electrode layer 6B are both arranged on the visible side, that is, on the cover panel 2 side with respect to the transparent insulating substrate 5, but the first electrode layer 6A and the second electrode layer 6B are arranged. The arrangement position of the electrode layer 6B is not limited to this.

FIG. 9 shows the configuration of the touch panel 41 according to the third embodiment of the present invention.
The touch panel 41 has a front surface 41A and a back surface 41B, and is used in a state where the display module 8 is arranged on the back surface 41B side. The surface 41A of the touch panel 41 is a touch detection surface, which is a visual side for the observer of the touch panel 41.

As shown in FIG. 9, the touch panel 41 has a cover panel 2 arranged on the viewing side and a touch panel electrode member 42 joined to the cover panel 2 by an adhesive on the side opposite to the viewing side. There is. The touch panel electrode member 42 is formed on the transparent insulating member 43, the first electrode layer 6A formed on the visible side surface 43A of the transparent insulating member 43, and the surface 43B opposite to the surface 43A of the transparent insulating member 43. It has a second electrode layer 6B that has been formed. The transparent insulating member 43 functions as a substrate that supports the first electrode layer 6A and the second electrode layer 6B, and a resin substrate, a glass substrate, or the like is used as the transparent insulating member 43. Further, as shown in FIG. 9, the transparent insulating member 7A may be arranged on the first electrode layer 6A for the purpose of flattening and protecting the first electrode layer 6A. Further, the transparent insulating member 7B may be arranged on the second electrode layer 6B for the purpose of protecting the second electrode layer 6B.

As described above, even when the first electrode layer 6A is arranged on one surface 43A side of the transparent insulating member 43 and the second electrode layer 6B is arranged on the other surface 43B side of the transparent insulating member 43. , The touch panel is similar to the case where both the first electrode layer 6A and the second electrode layer 6B are arranged on one surface side of the transparent insulating substrate 5 as in the case where the electrode member 3 for the touch panel of the first embodiment is arranged. It is possible to reduce moire generated when the electrode member 3 is used in the image display device 9.

Embodiment 3
In the touch panel electrode member 3 of the first embodiment, the first electrode layer 6A and the second electrode layer 6B are supported by the transparent insulating substrate 5, but the first electrode layer 6A and the second electrode layer 6B are cover panels. The electrode member for the touch panel may be configured so as to be supported by 2.

FIG. 10 shows the configuration of the touch panel electrode member 51 according to the fourth embodiment of the present invention.
The touch panel electrode member 51 has a front surface 51A and a back surface 51B, and is used in a state where the display module 8 is arranged on the back surface 51B side. The surface 51A of the touch panel electrode member 51 is a touch detection surface, which is a visible side for the observer of the touch panel electrode member 51.

As shown in FIG. 10, the touch panel electrode member 51 is provided on the cover panel 2, the first electrode layer 6A formed on the surface 2B opposite to the visible side of the cover panel 2, and the first electrode layer 6A. It has a transparent insulating member 7A formed in, a second electrode layer 6B formed on the transparent insulating member 7A, and a transparent insulating member 7B formed on the second electrode layer 6B. Further, the surface 2A on the visible side of the cover panel 2 is open to the outside. As described above, the cover panel 2 in the fourth embodiment functions as a substrate that supports the first electrode layer 6A, and as the cover panel 2, for example, a glass substrate or the like is used. The touch panel electrode member 51 has a cover panel 2 and can be used as a touch panel.

As described above, even when the first electrode layer 6A is formed on the cover panel 2 without having the transparent insulating substrate 5, it is transparent like the touch panel electrode member 3 of the first embodiment. Generated when the touch panel electrode member 3 is used in the image display device 9, as in the case where both the first electrode layer 6A and the second electrode layer 6B are arranged on one surface side of the insulating substrate 5. Moire can be reduced.

Hereinafter, each member constituting the touch panel electrode member 3 of the first embodiment will be described. The members constituting the touch panel electrode member 42 of the second embodiment and the touch panel electrode member 51 of the third embodiment are also the same as the members constituting the touch panel electrode member 3 of the first embodiment. do.

<Transparent insulating member>
The materials constituting the transparent insulating members 7A and 7B are not particularly limited as long as they are transparent and have electrical insulating properties and can insulate the first electrode layer 6A and the second electrode layer 6B, but for example. , An insulating layer or a transparent insulating substrate described later is used. As a material constituting the insulating layer, for example, an inorganic film such as silicon dioxide, silicon nitride, silicon oxynitride, aluminum oxide, acrylic resin, urethane resin, polyimide resin and the like can be used. As the insulating layer, an organic film is preferable, and an acrylic resin is particularly preferable. The thickness of the transparent insulating member is, for example, preferably 0.05 μm to 700.00 μm, more preferably 0.10 μm to 100.00 μm. In particular, when the transparent insulating member is an insulating layer of an organic film, the thickness is preferably 1.00 μm to 10.00 μm, more preferably 1.00 μm to 3.00 μm.

<Transparent insulation board>
The transparent insulating substrate 5 is not particularly limited as long as it is transparent and has electrical insulating properties and can support the first electrode layer 6A and the second electrode layer 6B, but is not particularly limited, but for example, a resin substrate or a glass substrate or the like. Is used. More specifically, examples of the material constituting the transparent insulating substrate 5 include glass, tempered glass, non-alkali glass, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and cycloolefin polymer (COP). : Cyclo-olefin polymer), cyclic olefin copolymer (COC), polycarbonate (PC: polyvinylate), acrylic resin, polyethylene (PE: polyethylene), polypropylene (PP: polypropylene), polystyrene (PS: polystylene), Polyvinyl chloride (PVC: polymer chloride), polyvinylidene chloride (PVDC: polyvinylidene chloride), triacetyl cellulose (TAC: cellulose triacetate) and the like can be used. The thickness of the transparent insulating substrate 5 is preferably, for example, 20 μm to 1100 μm, more preferably 20 μm to 500 μm. In particular, in the case of an organic resin substrate such as PET, the thickness is preferably 20 μm to 200 μm, more preferably 30 μm to 100 μm.

The total light transmittance of the transparent insulating substrate 5 is preferably 40% to 100%. The total light transmittance is measured by using, for example, "Plastic--How to determine the total light transmittance and the total light reflectance" specified in JIS K 7375: 2008.

One preferred embodiment of the transparent insulating substrate 5 is a treated substrate that has been subjected to at least one treatment selected from the group consisting of atmospheric pressure plasma treatment, corona discharge treatment and ultraviolet irradiation treatment. By performing the above-mentioned treatment, a hydrophilic group such as an OH group is introduced on the surface of the treated transparent insulating substrate 5, and the adhesion between the transparent insulating substrate 5 and the first electrode layer 6A is improved. Further, among the above-mentioned treatments, the atmospheric pressure plasma treatment is preferable in that the adhesion to the first electrode layer 6A and the second electrode layer 6B is further improved.

<Undercoat layer>
In order to improve the adhesion between the transparent insulating substrate 5 and the second electrode layer 6B, an undercoat layer may be arranged between the transparent insulating substrate 5 and the second electrode layer 6B. This undercoat layer contains a polymer, and the adhesion between the transparent insulating substrate 5 and the second electrode layer 6B is further improved.

The method for forming the undercoat layer is not particularly limited, and examples thereof include a method in which a composition for forming an undercoat layer containing a polymer is applied onto a substrate and heat-treated as necessary. Further, as the composition for forming the undercoat layer containing a polymer, gelatin, acrylic resin, urethane resin, acrylic / styrene-based latex containing inorganic or polymer fine particles, or the like may be used.

If necessary, the touch panel electrode member 3 is provided with, for example, a refractive index adjusting layer as another layer between the transparent insulating substrate 5 and the second electrode layer 6B in addition to the above-mentioned undercoat layer. You may. As the refractive index adjusting layer, for example, an organic layer to which particles of a metal oxide such as zirconium oxide for adjusting the refractive index are added can be used.

<Thin metal wire>
The thicknesses of the first metal wire MW1 and the second metal wire MW2 of the first electrode 11 and the first metal wire MW3 and the second metal wire MW4 of the second electrode 21 are not particularly limited, but are 0.01 μm. It is preferably ~ 10.00 μm, more preferably 2.00 μm or less, particularly preferably 0.02 μm to 1.00 μm, and most preferably 0.02 μm to 0.60 μm. Thereby, the durability of the first electrode 11 and the second electrode 21 can be improved relatively easily.

The first metal wire MW1, MW3 and the second metal wire MW2, MW4 may be made of a metal or alloy as a forming material and may be formed of, for example, copper, aluminum or silver. The first metal wire MW1, MW3 and the second metal wire MW2, MW4 preferably contain copper, but may contain a metal other than copper, for example, gold, silver, or the like. Further, the first metal wire MW1, MW3 and the second metal wire MW2, MW4 may contain a polymer binder such as metallic silver and gelatin or acrylic / styrene latex, which is suitable for forming a mesh pattern. Other preferred ones are aluminum, silver, molybdenum, titanium metals and alloys thereof. Further, these laminated structures may be used, and for example, fine metal wires having a laminated structure such as molybdenum / copper / molybdenum and molybdenum / aluminum / molybdenum can be used.

Further, the first metal wire MW1, MW3 and the second metal wire MW2, MW4 include, for example, metal oxide particles, silver paste and metal paste such as copper paste, and metal nanowire particles such as silver nanowire and copper nanowire. It may be a thing.
In order to improve the visibility of the first metal wire MW1, MW3 and the second metal wire MW2, MW4, a blackening layer is formed at least on the visible side of the first metal wire MW1, MW3 and the second metal wire MW2, MW4. You may. As the blackening layer, a metal oxide, a metal nitride, a metal oxynitride, a metal sulfide and the like are used, and typically, copper oxynitride, copper nitride, copper oxide, molybdenum oxide and the like can be used.

Next, a method for forming the first metal wire MW1, MW3 and the second metal wire MW2, MW4 will be described. As a method for forming these first metal thin wires MW1, MW3 and second metal thin wires MW2, MW4, for example, a sputtering method, a plating method, a silver salt method, a printing method and the like can be appropriately used.
A method for forming the first metal wire MW1, MW3 and the second metal wire MW2, MW4 by the sputtering method will be described. First, the copper foil layer is formed by sputtering, and the copper wiring is formed from the copper foil layer by the photolithography method, whereby the first metal thin wire MW1, MW3 and the second metal thin wire MW2, MW4 can be formed. Instead of sputtering, a copper foil layer can also be formed by so-called vapor deposition. As the copper foil layer, electrolytic copper foil can be used in addition to the sputtered copper foil or the vapor-deposited copper foil. More specifically, the step of forming the copper wiring described in JP-A-2014-29614 can be used.

The method of forming the first metal wire MW1, MW3 and the second metal wire MW2, MW4 by the plating method will be described. For example, the first metal wire MW1, MW3 and the second metal wire MW2, MW4 can be configured by using a metal plating film formed on the base layer by electroless plating the electroless plating base layer. .. In this case, the first metal wire MW1, MW3 and the second metal wire MW2, MW4 form a pattern of catalyst ink containing at least metal fine particles on the substrate, and then the substrate is immersed in an electroless plating bath. , Formed by forming a metal plating film. More specifically, the method for producing a metal-coated substrate described in JP-A-2014-159620 can be used.

Further, the first metal wire MW1, MW3 and the second metal wire MW2, MW4 form a resin composition having a functional group capable of interacting with at least the metal catalyst precursor in a pattern on the substrate, and then the catalyst or the catalyst. It is formed by applying a catalyst precursor and immersing the base material in an electroless plating bath to form a metal plating film. More specifically, the method for producing a metal-coated substrate described in Japanese Patent Application Laid-Open No. 2012-144761 can be applied.

A method for forming the first metal wire MW1, MW3 and the second metal wire MW2, MW4 by the silver salt method will be described. First, the silver salt emulsion layer containing silver halide is exposed to the exposure patterns of the first metal fine wires MW1 and MW3 and the second metal fine wires MW2 and MW4, and then developed. One metal thin wire MW1, MW3 and a second metal thin wire MW2, MW4 can be formed. More specifically, JP-A-2012-6377, JP-A-2014-121512, JP-A-2014-209332, JP-A-2015-22397, JP-A-2016-192200 and International Publication No. 2016. The method for manufacturing a thin metal wire described in 20157585 can be used.

The method of forming the first metal thin wire MW1 and MW3 and the second metal thin wire MW2 and MW4 by the printing method will be described. First, a conductive paste containing a conductive powder is applied to a substrate so as to have the same pattern as the first metal wire MW1, MW3 and the second metal wire MW2, MW4, and then the first metal is heat-treated. The thin wires MW1 and MW3 and the second metal thin wires MW2 and MW4 can be formed. The pattern formation using the conductive paste is performed by, for example, an inkjet method or a screen printing method. More specifically, as the conductive paste, the conductive paste described in JP-A-2011-28885 can be used.

<Cover panel>
As the material of the cover panel 2, tempered glass, polycarbonate, polyethylene terephthalate, polymethylacrylic resin (PMMA) or the like can be used, and the thickness of the cover panel 2 is preferably 0.1 mm to 1.5 mm. ..
<Adhesive>
As the adhesive 4 for adhering the cover panel 2 and the touch panel electrode member 3 to each other, an optical transparent adhesive sheet (OCA: Optical Clear Adhesive) or an optical transparent adhesive resin (OCR: Optical Clear Resin) can be used. The preferred film thickness is 10 μm or more and 200 μm or less. As the optical transparent adhesive sheet, for example, the 8146 series manufactured by 3M can be used.

Hereinafter, the present invention will be described in more detail based on examples. The materials, amounts, ratios, treatment contents, and treatment procedures shown in the following examples can be appropriately changed as long as they do not deviate from the gist of the present invention, and the scope of the present invention is limitedly interpreted by the following examples. It shouldn't be done.

<Example 1>
First, a PET film having a thickness of 100.0 μm was prepared as a transparent insulating substrate.

Next, an undercoat layer was formed on the PET film with an acrylic resin. The thickness of the undercoat layer was 10.0 μm.

Next, a second electrode layer patterned on the undercoat layer was constructed. First, a metal layer was obtained by sequentially sputtering a film on the undercoat layer so that molybdenum had a thickness of 20 nm, copper had a thickness of 300 nm, and molybdenum had a thickness of 20 nm.

Next, the resist composition was applied onto the metal layer, prebaked, and then patterned and subjected to alkaline development. After that, a resist film having a pattern corresponding to the plurality of second electrodes 21, the plurality of second pads 22, the plurality of second peripheral wirings 23, and the plurality of second external connection terminals 24 shown in FIG. 2 is post-baked. Formed. Then, an etching solution (pH (hydrogen ion index) 5.23) prepared with 10% by mass of ammonium dihydrogen phosphate, 10% by mass of ammonium acetate, 6% by mass of hydrogen peroxide, and the balance of water was added. The metal layer was etched using the above metal layer, and then the resist film was peeled off with a release liquid. As a result, a patterned second electrode layer was formed.

The formed second electrode layer had a plurality of second unit mesh patterns MP2 shown in FIG. Further, the line width of the first metal wire MW3 and the second metal wire MW4 of the second electrode 21 in the second electrode layer was 5.0 μm, and the thickness was 0.34 μm.

Next, a transparent insulating member having a thickness of 3.0 μm made of acrylic resin was formed so as to cover the second electrode layer. Next, a metal layer made of molybdenum / copper / molybdenum was formed on the transparent insulating member by a sputtering method. Next, by performing the steps of resist coating, pattern exposure, development, etching, and resist peeling, the first electrode 11, the first pad 12, the first peripheral wiring 13, and the first external connection terminal 14 shown in FIG. 2 are performed. A patterned first electrode layer having the above was formed.

The formed first electrode layer had a plurality of first unit mesh patterns MP1 shown in FIG. Further, the line width of the first metal wire MW1 and the second metal wire MW2 of the first electrode 11 in the first electrode layer was 5.0 μm, and the thickness was 0.34 μm.

Finally, for the purpose of protecting the first electrode layer, a transparent insulating member having a thickness of 3.0 μm made of acrylic resin was formed so as to cover the first electrode layer. In this way, the electrode member for the touch panel of Example 1 was obtained.
A portion corresponding to the peripheral region on the transparent insulating member covering the first electrode layer in order to cover the first peripheral wiring 13, the first external connection terminal 14, the second peripheral wiring 23, and the second external connection terminal 24. In addition, an opaque decorative layer having a thickness of 1.5 μm may be formed.

The touch panel electrode member thus obtained has a plurality of third unit mesh patterns MP3 shown in FIG. 7, and is the center of each of the two third unit mesh patterns MP3 adjacent to the first direction D1. The intersection angle B1 between the straight line L1 connecting the points C1 and C2 and the first direction D1, and the straight lines L3 and C4 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2, respectively. The crossing angle B2 with the two directions D2 was 1.4 degrees.

<Example 2>
By making the size of the intersection points CP1, CP2, and CP3 larger than that of the first embodiment, the straight lines L1 and the first direction connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 are connected. The intersection angle B1 with D1 and the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 are 2.9. The electrode member for the touch panel of Example 2 was produced in the same manner as in Example 1 except for the degree.

<Example 3>
By making the size of the intersection points CP1, CP2, and CP3 larger than that of the first embodiment, the straight lines L1 and the first direction connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 are connected. The intersection angle B1 with D1 and the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 are 2.7. The electrode member for the touch panel of Example 2 was produced in the same manner as in Example 1 except for the degree.

<Example 4>
By making the size of the intersection points CP1, CP2, and CP3 larger than that of the first embodiment, the straight lines L1 and the first direction connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 are connected. The intersection angle B1 with D1 and the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 are 2.2. The electrode member for the touch panel of Example 2 was produced in the same manner as in Example 1 except for the degree.

<Example 5>
By making the size of the intersection points CP1, CP2 and CP3 smaller than that of the first embodiment, the straight lines L1 and the first direction connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 are connected. The intersection angle B1 with D1 and the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 are 0.7. The electrode member for the touch panel of Example 2 was produced in the same manner as in Example 1 except for the degree.

<Example 6>
By making the size of the intersection points CP1, CP2 and CP3 smaller than that of the first embodiment, the straight lines L1 and the first direction connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 are connected. The intersection angle B1 with D1 and the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 are 0.3. The electrode member for the touch panel of Example 2 was produced in the same manner as in Example 1 except for the degree.

<Example 7>
By making the size of the intersection points CP1, CP2 and CP3 smaller than that of the first embodiment, the straight lines L1 and the first direction connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 are connected. The intersection angle B1 between the intersection angle B1 with D1 and the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 is 0.1. The electrode member for the touch panel of Example 2 was produced in the same manner as in Example 1 except for the degree.

<Example 8>
By making the size of the intersection points CP1, CP2, and CP3 larger than that of the first embodiment, the straight lines L1 and the first direction connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 are connected. The intersection angle B1 with D1 and the intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two third unit mesh patterns MP3 adjacent to the second direction D2 and the second direction D2 are 3.0. Except for the degree, the electrode member for the touch panel of Example 8 was produced in the same manner as in Example 1.

<Comparative Example 1>
The touch panel electrode member of Comparative Example 1 was produced in the same manner as in Example 1 except that a plurality of third unit mesh patterns MP3 were regularly arranged along the first direction D1 and the second direction D2. In Comparative Example 1, the crossing angle B1 between the straight line L1 connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 and the first direction D1 and the second direction D2 The crossing angle B2 between the straight line L3 connecting the center points C3 and C4 of the two adjacent third unit mesh patterns MP3 and the second direction D2 is 0.0 degrees.

The moire evaluation described below was performed on the touch panel electrode members of Examples 1 to 8 and Comparative Example 1 thus produced.
<Moire evaluation>
The touch panel electrode members of Examples 1 to 8 and Comparative Example 1 were arranged on a liquid crystal display module including a liquid crystal display and a controller for controlling the display of an image on the liquid crystal display. Next, with the entire surface of the liquid crystal display in the liquid crystal display module lit in green, the evaluator of the moire evaluation observes the electrode member for the touch panel arranged on the liquid crystal display module, and whether or not the moire is visually recognized. Was evaluated. There were 20 evaluators, and the criteria for moire evaluation were as follows.
"A": None of the 20 people recognized moiré.
"B": Of the 20 people, 1 or more and 3 or less recognized moire.
"C": Of the 20 people, 4 or more and 7 or less recognized moiré.
"D": Of the 20 people, 8 or more and 9 or less recognized moiré.
"E": More than 10 out of 20 people recognized moiré.
The evaluation "E" is a level where there is a practical problem, the evaluation "D" or higher is a level where there is no practical problem, the evaluation "C" is a better level, the evaluation "B" is an excellent level, and the evaluation ""A" is a very good level.

Table 1 shows the results of moire evaluation for Examples 1 to 8 and Comparative Example 1.

As shown in Table 1, in Examples 1 to 8, the moire evaluation was "C" or higher, and the moire could be reduced to a level where there was no practical problem. Specifically, Examples 1, 4 and 5 have a moiré evaluation of "A", which is particularly excellent, Examples 3 and 6 have a moiré evaluation of "B", and Examples 2 and 7 have a moiré evaluation. It was "C", and in Example 8, the moire evaluation was "D".

Further, in Comparative Example 1, the moire evaluation was "E".
In the electrode member for the touch panel of Comparative Example 1, since a plurality of third unit mesh patterns MP3 are regularly arranged along the first direction D1 and the second direction D2, the plurality of third unit mesh patterns MP3 and the liquid crystal display module are arranged. It is considered that the regular pixel patterns of the above are likely to interfere with each other, and moire is likely to be visually recognized.

From the results of the moire evaluation, the intersection angle B1 between the straight line L1 connecting the center points C1 and C2 of the two third unit mesh patterns MP3 adjacent to the first direction D1 and the first direction D1 and the second direction D2. The intersection angle B2 between the straight line L3 connecting the center points C3 and C4 of the two adjacent third unit mesh patterns MP3 and the second direction D2 is preferably 0.1 degree or more and 2.9 degrees or less. , 0.3 degrees or more and 2.7 degrees or less is more preferable, and 0.7 degrees or more and 2.2 degrees or less is further preferable. It can be seen that when the intersection angles B1 and B2 are in these ranges, moire is less likely to be visually recognized.

1 Touch panel, 1A, 41A, 51A front surface, 1B, 41B, back surface, 2 cover panel, 2A, 2B, 43A, 43B surface, 3,42 touch panel electrode member, 4,4A adhesive, 5 transparent insulating substrate, 6A 1 electrode layer, 6B 2nd electrode layer, 7A, 7B, 43 transparent insulating member, 8 display module, 9 image display device, 11 1st electrode, 12 1st pad, 13 1st peripheral wiring, 14 1st external connection terminal , 21 2nd electrode, 22 2nd pad, 23 2nd peripheral wiring, 24 2nd external connection terminal, B1, B2 crossing angle, BP1, BP3 1st bending part, BP2, BP4 2nd bending part, C1, C2 C3, C4 center point, CP1, CP2, CP3 intersection, D1 1st direction, D2 2nd direction, D3, D4 direction, K1 length, L1, L2, L3, L4 straight line, MP1 1st unit mesh pattern, MP2 1st 2 unit mesh pattern, MP3 3rd unit mesh pattern, MW1, MW3 1st metal wire, MW2, MW4 2nd metal wire, R intersection region, S1 transmission region, S2 peripheral region, SP1, SP3 1st side member, SP2, SP4 2nd side member, W line width.

Claims (12)

In a plan view, a plurality of unit mesh patterns spread by intersecting a plurality of first metal thin wires each extending in the first direction and a plurality of second metal fine wires extending in a second direction intersecting the first direction. It is an electrode member for a touch panel having
A straight line connecting the center points of the two unit mesh patterns adjacent to the first direction extends in a direction intersecting the first direction.
The straight line connecting the center points of the two unit mesh patterns adjacent to the second direction is a touch panel electrode member extending in a direction intersecting the second direction. The straight line connecting the center points of the two unit mesh patterns adjacent to the first direction intersects the first direction at an angle of 0.1 degrees or more and 2.9 degrees or less.
Claim 1 that the straight line connecting the center points of the two unit mesh patterns adjacent to the second direction intersects the second direction at an angle of 0.1 degrees or more and 2.9 degrees or less. The electrode member for a touch panel described in 1. The electrode member for a touch panel according to claim 1 or 2, wherein the unit mesh pattern has a diamond shape. The electrode member for a touch panel according to claim 3, wherein the length of one side of the unit mesh pattern is 150 μm or more and 350 μm or less. The electrode member for a touch panel according to any one of claims 1 to 4, wherein the first metal wire and the second metal wire have a line width of 1 μm or more and 10 μm or less. The electrode member for a touch panel according to any one of claims 1 to 5, wherein the first metal wire and the second metal wire are made of copper. With more transparent insulation
The electrode member for a touch panel according to any one of claims 1 to 6, wherein the first metal wire and the second metal wire are respectively arranged on both sides of the transparent insulating member. The electrode member for a touch panel according to claim 7, wherein the transparent insulating member is made of a resin substrate. Further equipped with a resin substrate,
The electrode member for a touch panel according to claim 7, wherein the first metal wire, the second metal wire, and the transparent insulating member are arranged on one surface of the resin substrate. With more glass substrate,
The electrode member for a touch panel according to claim 7, wherein the first metal wire, the second metal wire, and the transparent insulating member are arranged on one surface of the glass substrate. A touch panel including the electrode member for a touch panel according to any one of claims 1 to 10. An image display device including the touch panel according to claim 11.

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