WO2012046631A1

WO2012046631A1 - Touch panel, and display device provided with same

Info

Publication number: WO2012046631A1
Application number: PCT/JP2011/072408
Authority: WO
Inventors: 聖中原; 安弘小原
Original assignee: シャープ株式会社
Priority date: 2010-10-08
Filing date: 2011-09-29
Publication date: 2012-04-12
Also published as: TW201224887A

Abstract

A touch panel configured so as to be able to detect the touched position on an operating surface, wherein bridging parts which connect electrode pads with one another are hardly visible. A touch panel (2) is provided with a substrate (11), Y-direction electrodes (21) (first electrodes) formed so as to extend in one direction on the substrate (11), and X-direction electrodes (22) (second electrodes) formed, on the substrate (11), so as to extend in a direction which intersects with the Y-direction electrodes (21). The X-direction electrodes (22) are provided with a plurality of second electrode pads (22a) arranged so as to sandwich the Y-direction electrodes (21) therebetween, and bridging parts (23) for electrically connecting the X-direction electrode pads (22a) with one another by extending over the Y-direction electrodes (21). The bridging parts (23) are provided with a pair of joining sections (23b) joined to the X-direction electrode pads (22a), and a linking section (23a) for linking the pair of joining sections (23b) with one another and having a smaller width than the joining sections (23b).

Description

Touch panel and display device including the same

The present invention relates to a touch panel capable of detecting a touch position on an operation surface and a display device including the touch panel.

Conventionally, a touch panel capable of detecting a position touched by a pen or a finger on an operation surface, that is, a touch position is known. In such a touch panel, for example, as disclosed in Japanese Patent Application Laid-Open No. 2010-33478, an electrode extending in a first direction and a second direction intersecting the first direction are formed on a substrate. A plurality of existing electrodes are provided. Specifically, in the configuration disclosed in Japanese Patent Application Laid-Open No. 2010-33478, the electrodes connected in the first direction are integrally formed, and the electrodes connected in the second direction are electrode pads ( The second part) is electrically connected to each other by a bridge part (first part). The bridge portion is provided so as to straddle the electrode extending in the first direction.

Accordingly, in the configuration disclosed in Japanese Patent Application Laid-Open No. 2010-33478, a finger touching the touch panel is respectively disposed between the electrode extending in the first direction and the electrode connected in the second direction. A capacitance is formed. And the touch position of an operation surface is detectable by detecting the capacitance difference of these electrostatic capacitances. That is, the configuration disclosed in Japanese Patent Application Laid-Open No. 2010-33478 is a so-called capacitive touch panel.

By the way, as disclosed in JP 2010-33478 A, when the electrode pads are connected by a bridge portion arranged so as to straddle other electrodes, the bridge portion is easily visible. That is, in general, the electrodes of the touch panel are made of a transparent conductive film material, and the bridge portion is formed of a metal material such as an aluminum alloy that is the same as the wiring, so that the bridge portion is easily visible to an observer.

Therefore, in the following embodiment, an object of the touch panel configured to be able to detect the touch position on the operation surface is to obtain a configuration in which the bridge portion that connects the electrode pads is hardly visible.

A touch panel according to an embodiment of the present invention includes a substrate, a first electrode formed on the substrate so as to extend in one direction, and extends on the substrate in a direction intersecting with the first electrode. A plurality of second electrode pads arranged so as to sandwich the first electrode, and the second electrode pads straddling the first electrode. A bridge portion that is electrically connected to the second electrode pad, and the bridge portion connects the pair of junction portions to each other and has a smaller width than the junction portion. And a connecting portion.

The touch panel according to the embodiment of the present invention can make it difficult to visually recognize the bridge portion that connects the electrode pads.

FIG. 1 is a cross-sectional view schematically illustrating an overall configuration of a liquid crystal display device with a touch panel including the touch panel according to the first embodiment. FIG. 2 is a plan view showing a schematic configuration of the touch panel. FIG. 3 is a plan view showing a schematic configuration of the X-direction electrode pad. FIG. 4 is a plan view showing a configuration of a bridge portion that connects the X-direction electrode pads. 5 is a cross-sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a plan view showing a bridge portion of the touch panel according to the second embodiment.

A touch panel according to an embodiment of the present invention includes a substrate, a first electrode formed on the substrate so as to extend in one direction, and extends on the substrate in a direction intersecting with the first electrode. A plurality of second electrode pads disposed so as to sandwich the first electrode, and the second electrode pads straddling the first electrode. A bridge portion that is electrically connected to the second electrode pad, and the bridge portion connects the pair of junction portions to each other and has a smaller width than the junction portion. And a connecting portion. (First configuration).

In the above configuration, it is possible to make it difficult to visually recognize the bridge portion that electrically connects the second electrode pads across the first electrode. That is, the bridge portion is formed so that the width of the connecting portion that connects the joint portions to each other is smaller than that of the joint portion that is joined to the second electrode pad. Thereby, it can be made difficult to visually recognize a bridge part. On the other hand, by making the joint part of the bridge part wider than the connection part, the part joined to the second electrode pad can be made larger than the bridge part having a uniform width. Thereby, this junction part and a 2nd electrode pad can be joined more reliably.

In the first configuration, the connecting portion of the bridge portion is preferably formed such that a pair of sides extending between the pair of joint portions are parallel to each other when viewed from the normal direction of the substrate ( Second configuration). In this way, by forming the connecting portion of the bridge portion so that the pair of sides extending between the pair of joint portions are parallel when viewed from the normal direction of the substrate, the width of the connecting portion is minimized. When it does, the area of the connection part at the time of seeing from the visual recognition side of a touch panel can be made as small as possible. Therefore, the connection part of a bridge part can be made harder to visually recognize.

In the first or second configuration, it is preferable that the second electrode pad is provided with an extended portion on the outer peripheral portion where the bonding portion of the bridge portion is bonded (third configuration). Thereby, since a junction part can be joined to the position near the adjacent 2nd electrode pad, the length of the connection part of the bridge part which connects this 2nd electrode pad can be shortened. Therefore, it is possible to make the bridge portion more difficult to visually recognize.

In the third configuration, the second electrode pad is formed in a polygonal shape in a plan view, and the extending portion is provided in a corner portion of the second electrode pad close to the adjacent second electrode pad. It is preferable to be used (fourth configuration).

In the case of the structure in which the joint portion of the bridge portion is joined to the corner portion of the polygonal second electrode pad, in order to join the joint portion with the second electrode pad securely, the joint portion is not used in the corner portion where the space is narrow. It is preferable to bond to the inner side of the second electrode pad. In this case, the length of the connecting portion of the bridge portion is increased by the amount where the joint portion of the bridge portion is positioned inward of the second electrode pad.

On the other hand, as described above, in the second electrode pad, an extension portion is provided at a corner portion close to the adjacent second electrode pad, thereby shortening the interval between the portions where the joint portions of the bridge portion are joined. It becomes possible. Thereby, the length of the connection part of a bridge part can be shortened as much as possible, and this bridge part can be made harder to visually recognize.

A display device with a touch panel according to an embodiment of the present invention includes a display panel capable of displaying an image, and the touch panel according to any one of claims 1 to 4 arranged so as to overlap the display panel. Provided (fifth configuration).

Hereinafter, preferred embodiments of the touch panel will be described with reference to the drawings. In addition, the dimension of the structural member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each structural member, etc. faithfully.

[First Embodiment]
(overall structure)
In FIG. 1, schematic structure of the liquid crystal display device 1 with a touch panel (display device with a touch panel) provided with the touch panel 2 which concerns on one Embodiment of this invention is shown. As shown in FIG. 1, a liquid crystal display device 1 with a touch panel is configured by superimposing a touch panel 2 capable of detecting a touch position on a liquid crystal panel 3 (display panel) capable of displaying an image. In FIG. 1, reference numeral 4 denotes a backlight. Further, illustration of a cover glass or the like covering the surface of the touch panel 2 opposite to the liquid crystal panel 3 (operation surface side, viewing side) is omitted.

The touch panel 2 includes a touch electrode 12 arranged on the operation surface so that the position touched on the operation surface can be detected (see FIG. 2). The touch panel 2 of the present embodiment utilizes the fact that capacitance is formed between the touch electrode 12 and the finger touching the operation surface, and the capacitance between the electrode and the finger depending on the touch position. The touch position is determined from the difference. That is, the touch panel 2 of the present embodiment is a so-called capacitance type touch panel.

Specifically, as shown in FIGS. 5 and 6, the touch panel 2 includes a substrate 11, a touch electrode 12 formed on one surface side (operation surface side, viewing side) of the substrate 11, and the touch electrode 12. And an insulating layer 13 formed between the substrate 11 and the protective layer 14 for protecting the touch electrode 12. As shown in FIG. 2, the touch electrode 12 includes a plurality of

electrode pads

21a and 22a formed in a substantially square shape and a plurality of

electrode pads

21c and 22c formed in a substantially triangular shape. The touch electrode 12 is configured by arranging these

electrode pads

21a, 22a, 21c, and 22c at almost equal intervals on the entire operation surface.

As will be described in detail later, the touch electrode 12 includes an X direction electrode 22 (second electrode) extending in the X direction and a Y direction electrode 21 (first electrode) extending in the Y direction (one direction). The X direction electrode 22 and the Y direction electrode 21 are made of a light-transmitting conductive material (transparent conductive material) such as ITO (indium tin oxide). Note that, as shown in FIG. 2, the X direction and the Y direction intersect each other.

The detailed configuration of the touch panel 2 will be described later.

As shown in FIG. 1, the liquid crystal panel 3 includes an active matrix substrate 5 in which a large number of pixels are arranged in a matrix, and a counter substrate 6 disposed to face the active matrix substrate 5. The liquid crystal panel 3 includes a liquid crystal layer 7 between the active matrix substrate 5 and the counter substrate 6. The liquid crystal layer 7 may be any type of liquid crystal as long as it can display an image by controlling the liquid crystal, and the operation mode of the liquid crystal may be any mode. The liquid crystal panel 3 is attached with a pair of polarizing plates (not shown) so as to sandwich the active matrix substrate 5 and the counter substrate 6.

The active matrix substrate 5 is provided with a plurality of TFTs (Thin Film Transistor; not shown), pixel electrodes, and a plurality of wirings (source wiring, gate wiring, etc.) on a transparent substrate such as a glass substrate. is there. Since the TFT has the same configuration as the conventional one, detailed description is omitted.

The pixel electrode is a transparent electrode, and is formed of a transparent conductive material such as ITO, for example. The pixel electrodes are spaced apart from each other for each pixel. The pixel electrode defines a pixel as a unit of image display.

Although not particularly illustrated, the source electrode, the gate electrode, and the drain electrode of the TFT are connected to the source wiring, the gate wiring, and the pixel electrode, respectively. The point that a signal is input to the TFT via the gate wiring and the source wiring and the TFT is driven is the same as that of the conventional liquid crystal display device, and thus detailed description is omitted.

The counter substrate 7 is obtained by providing a counter electrode made of a transparent conductive film material such as ITO on a transparent substrate such as a glass substrate. When the liquid crystal panel 3 is a liquid crystal panel capable of displaying a color image, an RGB color filter, for example, is provided on the counter substrate.

(Touch panel)
Hereinafter, the configuration of the touch panel 2 will be described with reference to FIGS. In FIGS. 2 and 4, the wiring 24 and the bridge portion 23 are hatched to make the wiring 24 and the bridge portion 23 easier to see.

As described above, the touch panel 2 includes the substrate 11, the touch electrode 12, the insulating layer 13, and the protective layer 14 (see FIGS. 5 and 6). And the touch electrode 12 has the X direction electrode 22 extended in the X direction of FIG. 2, and the Y direction electrode 21 extended in a Y direction. These X direction electrode 22 and Y direction electrode 21 are both made of a transparent conductive film material such as ITO.

The Y-direction electrode 21 is formed by integrally forming a substantially square Y-direction electrode pad 21a in plan view and a connection portion 21b that connects the Y-direction electrode pads 21a. That is, the Y-direction electrode 21 has a shape that is long in the Y direction in FIG.

Specifically, the Y-direction electrode 21 is such that the corner portions of the Y-direction electrode pad 21a are connected by the connecting portion 21b in a state where the plurality of Y-direction electrode pads 21a are arranged so that the diagonal line coincides with the Y-direction. Has a shape. The Y direction electrode 21 is formed such that a plurality of Y direction electrode pads 21a are arranged at equal intervals in the Y direction. A plurality of Y direction electrodes 21 are provided side by side in the X direction.

It should be noted that a substantially triangular Y-direction electrode pad 21c is provided at both ends in the longitudinal direction of the Y-direction electrode 21 in plan view. That is, the Y-direction electrode pads 21c located at both ends in the longitudinal direction of the Y-direction electrode 21 are approximately half the size of the other Y-direction electrode pads 21a.

As shown in FIG. 2, the X-direction electrode 22 has a substantially rectangular shape like the Y-direction electrode pad 21a described above and has an X-direction electrode pad 22a (second electrode) having the same size as the Y-direction electrode pad 21a. Pad) and a bridge portion 23 for connecting the X-direction electrode pads 22a to each other. Specifically, the X-direction electrode 22 is configured by connecting the corner portions of a plurality of X-direction electrode pads 22 a arranged so that the diagonal line coincides with the X direction by the bridge portion 23.

The X direction electrode pads 22a are arranged at regular intervals in the X direction. Further, the X-direction electrode pad 21a is disposed so as to sandwich the connecting portion 21b of the Y-direction electrode 21 between corner portions. Thereby, as shown in FIG. 2, the Y-direction electrode pad 21a and the X-direction electrode pad 22a are arranged on the entire operation surface at equal intervals.

As in the Y-direction electrode pad 21c located at both longitudinal ends of the Y-direction electrode 21, the X-direction electrode 22 is provided with substantially triangular X-direction electrode pads 22c at both longitudinal ends. . That is, the X-direction electrode pads 22c located at both ends in the longitudinal direction of the X-direction electrode 22 are approximately half the size of the other X-direction electrode pads 22a.

The

X-direction electrode pads

22 a and 22 c of the X-direction electrode 22 are connected to the adjacent

X-direction electrode pads

22 a and 22 c with the Y-direction electrode 21 interposed therebetween by the bridge portion 23. As shown in FIG. 2, the bridge portion 23 that connects the

X-direction electrode pads

22 a and 22 c is disposed so as to straddle the connection portion 21 b of the Y-direction electrode 21.

The

X-direction electrode pads

22a and 22c are made of a transparent conductive material such as ITO, for example, like the Y-direction electrode 21. As shown in FIGS. 3 and 4, the X-direction electrode pad 22 a is provided with an extending portion 22 b for connecting the bridge portion 23 to a pair of opposite corner portions. The extending portion 22b is a rectangular region integrally formed with the X-direction electrode pad 22a. Thus, by providing the extending portion 22b on the X-direction electrode pad 22a, the portion to be joined to the bridge portion 23 (joint portion 23b shown in FIG. 4) is more peripheral than the X-direction electrode pad 22a, as will be described later. Can be positioned on the side. The X-direction electrode pads 22c located at both ends in the longitudinal direction of the X-direction electrode 22 are also provided with the above-described extending portions 22b at the corner portions, like the other X-direction electrode pads 22a.

As shown in FIG. 4, the extending portion 22 b has a larger area than the joining portion 23 b so that the joining portion 23 b of the bridge portion 23 is positioned in the extending portion 22 b in a plan view. Thereby, even if a dimensional error arises in the X direction electrode 22 or the bridge part 23, the junction part 23b of this bridge part 23 can be more reliably joined with respect to the extension part 22b.

The bridge portion 23 is made of a transparent conductive material such as ITO, for example, similarly to the Y-direction electrode 21 and the

X-direction electrode pads

22a and 22c. As shown in FIG. 4, the bridge portion 23 is formed on a substantially rectangular connecting portion 23 a having a pair of sides parallel to each other when viewed from the normal direction of the substrate 11, and on both sides in the longitudinal direction of the connecting portion 23 a. And a joining portion 23b. The connecting portion 23a is formed to have a smaller width than the joint portion 23b. That is, this bridge part 23 has a shape like a dumbbell.

Thus, by reducing the width of the connecting portion 23a of the bridge portion 23 compared to the joint portion 23b, the bridge portion 23 can be made difficult to visually recognize.

The joint portion 23b of the bridge portion 23 is joined to the extended portions 22b of the

X-direction electrode pads

22a and 22c. Specifically, as will be described later, the joint portion 23b of the bridge portion 23 and the extending portions 22b of the

X-direction electrode pads

22a and 22c are electrically connected by the contact hole 13a. As described above, by providing the extended portions 22b on the

X-direction electrode pads

22a and 22c, compared to the case where the joint portion 23b of the bridge portion 23 is connected to an electrode without the extended portion 22b (for example, a rectangular electrode). Thus, the X direction electrode 22 can be joined to a position on the outer peripheral side. That is, in the case where the X direction electrode has a quadrangular shape with no extending portion, if the joining portion 23b of the bridge portion 23 is to be joined to the X direction electrode, in consideration of a dimensional error, a positional deviation, and the like, It is necessary to join the joint portion 23b of the bridge portion 23 at this position. On the other hand, the extending portion 22b as described above is provided on the

X-direction electrode pads

22a and 22c, and the connecting portion 23b of the bridge portion 12 is bonded to the extending portion 22b, thereby connecting the connecting portion 23b to the X direction. It can be joined to the electrode 22 at the outer peripheral portion of the X-direction electrode 22. Thereby, the length of the connection part 23a of the bridge part 23 can be shortened, and this bridge part 23 can be made difficult to visually recognize.

In addition, the bridge part 23 becomes difficult to visually recognize if the dimension of the width direction of the connection part 23a is 0.25 times or less with respect to the length P of this bridge part 23 whole. More preferably, the widthwise dimension of the connecting portion 23a is 0.05 times or less the entire length P of the bridge portion 23, and more preferably the widthwise dimension of the connecting portion 23a is the bridge portion 23. The total length P is 0.02 to 0.03 times.

The length P of the entire bridge portion 23 is a dimension Q between the end of the extended portion 22a and the end of the extended portion 22a on the opposite side of the X direction electrode 22 (hereinafter referred to as the electrode length of the X direction electrode 22). If it is 0.25 times or less, it will be difficult to visually recognize. More preferably, the entire length P of the bridge portion 23 is 0.06 to 0.08 times the electrode length Q of the X-direction electrode 22. The numerical value of 0.06 times to 0.08 times is calculated based on this minimum value because the minimum value of the width of the bridge portion 23 that can be formed with a certain degree of dimensional accuracy is 4 to 5 μm. It is.

Further, the width of the joint portion 23b of the bridge portion 23 is preferably 1.25 to 3.57 times the width of the connecting portion 23a of the bridge portion 23.

Furthermore, as a result of making a touch panel having a width of the connecting portion 23a of the bridge portion 23 of 1 μm, 4 μm, 8 μm, 12 μm, 16 μm, and 20 μm and confirming it visually, the width of the connecting portion 23a is 12 μm or less. In this case, the connecting portion 23a could not be visually recognized. Therefore, the width of the connecting portion 23a of the bridge portion 23 is preferably 12 μm or less.

As shown in FIG. 2, a lead-out wiring 24 is connected to substantially

triangular electrodes

21c, 22c located on one end side in the longitudinal direction of the Y-direction electrode 21 and the X-direction electrode 22. The lead wiring 24 is made of a metal material such as an aluminum alloy, for example. The lead-out wiring 24 is formed so that the end opposite to the end connected to the Y-direction electrode 21 and the X-direction electrode 22 gathers on one side of the substrate 11. A terminal 25 for outputting a signal to an external control circuit is formed at the end of the collected lead wiring 24.

The cross-sectional structure of the touch panel is shown in FIGS. 5 and 6 are a cross-sectional view taken along the line VV and a cross-sectional view taken along the line VI-VI in FIG. 2, respectively.

As shown in FIGS. 5 and 6, a bridge portion 23 and a lead wiring 24 for connecting the X direction electrodes 22 to each other are provided on the substrate 11. That is, in the present embodiment, the bridge portion 23 and the lead wiring 24 made of the same metal material are formed in the lowermost layer. An insulating layer 13 is formed on the substrate 11, the bridge portion 23, and the lead-out wiring 24, and a Y-direction electrode 21 and an X-direction electrode 22 made of a transparent conductive material such as ITO are formed on the insulating layer 13. Is formed. And the protective layer 14 is provided so that the Y direction electrode 21 and the X direction electrode 22 may be covered.

In the insulating layer 13, a contact hole 13 a for electrically connecting the X-direction electrode 22 and the bridge portion 23 formed on the substrate 11 is formed. Thereby, the X direction electrode 22, the Y direction electrode 21, and the bridge | bridging part 23 can be formed as a different layer. Accordingly, a three-dimensional intersection between the connecting portion 21a of the Y-direction electrode 21 and the bridge portion 23 that connects the

X-direction electrode pads

22a and 22c becomes possible.

(Effects of the first embodiment)
In this embodiment, the width of the connecting portion 23a of the bridge portion 23 that connects the adjacent X-direction electrodes 22 is made smaller than the width of the joint portion 23b located at both ends in the longitudinal direction. Thereby, it can be made difficult to visually recognize the connection part 23a. Therefore, it is possible to prevent the bridge portion 23 from being visually recognized.

In addition, since the extending portion 22 a to which the joint portion 23 a of the bridge portion 23 is connected is provided on the X direction electrode 22, the joint portion 23 a can be connected to the outer peripheral side of the X direction electrode 22. Thereby, the length of the connection part 23a of the bridge part 23 can be shortened. Therefore, it is possible to make the bridge portion 23 difficult to visually recognize.

[Second Embodiment]
FIG. 7 shows a configuration of the bridge portion of the touch panel according to the second exemplary embodiment. Since the configuration of this embodiment is the same as that of the first embodiment described above except for the shape of the bridge portion, in the following description, the same parts as those of the first embodiment are denoted by the same reference numerals, and only different parts are described. explain. In FIG. 7 as well, the bridge portion is hatched as in the first embodiment.

Specifically, as shown in FIG. 7, the bridge portion 31 is formed so that the width gradually decreases toward the central portion in the longitudinal direction. Thereby, the longitudinal direction center part 31a of the bridge part 31 can be made thin, and this bridge part 31 can be made difficult to visually recognize. In addition, with the above-described configuration, the width of both end portions 31b of the bridge portion 31 joined to the X direction electrode 22 can be increased, and the bridge portion 31 and the X direction electrode 22 can be more reliably joined.

In the present embodiment, the long side of the bridge portion 31 is formed linearly in plan view so that the width of the bridge portion 31 decreases toward the longitudinal central portion 31a. However, as long as the width of the bridge portion 31 is reduced toward the central portion 31a in the longitudinal direction, the long side of the bridge portion may be formed in a curve in plan view.

(Effect of 2nd Embodiment)
In this embodiment, the bridge portion 31 that connects the

X-direction electrode pads

22a and 22c is shaped such that the width gradually decreases toward the central portion 31a in the longitudinal direction. Accordingly, it is possible to make it difficult to visually recognize the central portion 31a in the longitudinal direction of the bridge portion 31, and it is possible to more reliably join both end portions 31b in the longitudinal direction of the bridge portion 31 to the

X-direction electrode pads

22a and 22c.

(Other embodiments)
While the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

In each of the above embodiments, the Y-

direction electrode pads

21a and 21c and the

X-direction electrode pads

22a and 22c are formed in a substantially square shape or a substantially triangular shape. However, the Y-direction electrode pad and the X-direction electrode pad may be formed in other shapes such as a polygon or a circle. In this case, the extending portion may be provided at a position near the adjacent X-direction electrode pad on the outer peripheral portion of the X-direction electrode pad.

In each of the embodiments, the Y-

direction electrode pads

21a and 21c and the

X-direction electrode pads

22a and 22c are arranged so that the corner portions are close to each other. However, the Y-

direction electrode pads

21a and 21c and the

X-th electrode pads

22a and 22c may be arranged so that the sides approach each other.

In each of the above embodiments, the

X-direction electrode pads

22a and 22c are provided with the rectangular extending portions 22a. However, the shape of the extending portion may be any shape such as a substantially circular shape or a pentagonal or higher polygon.

In each of the above embodiments, the

bridge portions

23 and 31 are made of the same metal material as that of the wiring, but may be made of a transparent conductive film material such as ITO. If it carries out like this, it will become difficult to visually recognize the

bridge parts

23 and 31 further.

In each of the above embodiments, the shape of the

bridge portions

23 and 31 is devised, but in addition to these shapes, the surface of the

bridge portions

23 and 31 may be processed to increase the surface roughness. Good. Thereby, the

bridge parts

23 and 31 can be made more difficult to visually recognize.

The touch panel according to the present invention can be used for a touch panel in which a bridge portion that electrically connects electrode pads is arranged so as to straddle an electrode provided to extend in one direction.

Claims

A substrate,
A first electrode formed on the substrate so as to extend in one direction;
A second electrode formed on the substrate so as to extend in a direction intersecting the first electrode;
The second electrode includes a plurality of second electrode pads arranged so as to sandwich the first electrode, and a bridge portion that electrically connects the second electrode pads across the first electrode. Have
The bridge portion includes a pair of joint portions that are joined to the second electrode pad, and a connection portion that connects the pair of joint portions and has a smaller width than the joint portion.
The touch panel according to claim 1, wherein the connecting portion of the bridge portion is formed so that a pair of sides extending between the pair of joint portions are parallel when viewed from a normal direction of the substrate.
3. The touch panel according to claim 1, wherein the second electrode pad is provided with an extended portion on the outer peripheral portion thereof where the joint portion of the bridge portion is joined.
The second electrode pad is formed in a polygonal shape in plan view,
The touch panel according to claim 3, wherein the extending portion is provided at a corner portion of the second electrode pad that is close to an adjacent second electrode pad.
A display panel capable of displaying images;
A display device with a touch panel, comprising the touch panel according to any one of claims 1 to 4 disposed so as to overlap the display panel.