Touch panel

Abstract

The present application provides a touch panel, which includes a first conductive grid layer, a second conductive grid layer and an insulating layer. The first conductive grid layer includes at least one first touch electrode and at least one first dummy electrode, each having a plurality of grids composed of conductive material. The first touch electrode and the first dummy electrode are electrically separated from each other, wherein at least two grids of the first dummy electrode have different shapes. The insulating layer separates the first conductive grid layer from the second conductive grid layer. In this way, the shape of the conductive grid in the non-functional area is irregular, which can avoid the moire problem caused by the regular pattern arrangement of the whole layer.

Description

Technical Field

[0001] This invention relates to a touch panel. Background Technology

[0002] Touch panel products are widely used in daily work and life. Generally speaking, the structure of a touch panel includes a sensing area formed on the surface of a substrate. This sensing area is used to sense the human finger or a writing tool similar to a pen to achieve a touch effect.

[0003] Transparent conductive materials (such as indium tin oxide) are indispensable in current mobile terminal touch panels. However, transparent conductive materials also have problems such as high cost and difficulty in recycling. In order to break away from price competition in touch panels made of traditional transparent conductive materials and to address current industry development bottlenecks, manufacturers are seeking new material technologies to replace transparent conductive materials in order to reduce costs and increase profits.

[0004] Metal mesh touch panel technology has quickly gained favor among mainstream manufacturers due to its advantages such as low resistivity, easy material availability, and simple manufacturing process, leading to various large-size panels. However, metal mesh also has some drawbacks. For example, the mesh shape is prone to moiré pattern issues, resulting in poor visual effects and hindering its widespread application in various products. Summary of the Invention

[0005] In several embodiments of the present invention, in at least one conductive mesh layer, the shape of the conductive mesh in the non-functional area is designed to be irregular, which can avoid the moiré pattern problem caused by the regular pattern setting of the entire layer.

[0006] According to some embodiments of the present invention, a touch panel includes a first conductive mesh layer, a second conductive mesh layer, and an insulating layer. The first conductive mesh layer includes at least one first touch electrode and at least one first dummy electrode, each having a plurality of meshes made of a conductive material. The first touch electrode and the first dummy electrode are electrically separated from each other, wherein at least two meshes of the first dummy electrode have different shapes. The insulating layer separates the first conductive mesh layer from the second conductive mesh layer.

[0007] In some embodiments of the present invention, the first dummy electrode has multiple grid nodes, which are periodically arranged.

[0008] In some embodiments of the present invention, the shape of at least one grid of the first dummy electrode is different from the shape of any grid of the first touch electrode.

[0009] In some embodiments of the present invention, the first dummy electrode has a plurality of grid nodes, the first touch electrode has a plurality of grid nodes, and the period of the grid nodes of the first dummy electrode is the same as or different from the period of the grid nodes of the first touch electrode.

[0010] In some embodiments of the present invention, the meshes of the first touch electrodes have the same shape.

[0011] In some embodiments of the present invention, the second conductive mesh layer includes at least one second touch electrode and at least one second dummy electrode, each having a plurality of meshes made of conductive material, and the second touch electrode and the second dummy electrode are electrically separated from each other.

[0012] In some embodiments of the present invention, at least two grids of the second dummy electrode have different shapes.

[0013] In some embodiments of the present invention, the second dummy electrode has multiple grid nodes, which are periodically arranged.

[0014] In some embodiments of the present invention, the shape of at least one grid of the second dummy electrode is different from the shape of any grid of the second touch electrode.

[0015] In some embodiments of the present invention, the second dummy electrode has multiple grid nodes, the second touch electrode has multiple grid nodes, and the period of the grid nodes of the second dummy electrode is the same as or different from the period of the grid nodes of the second touch electrode.

[0016] In some embodiments of the present invention, the mesh shape of the second touch electrode is the same.

[0017] In some embodiments of the present invention, the first touch electrode has a plurality of grid nodes, the second touch electrode has a plurality of grid nodes, and the projection of the grid nodes of the first touch electrode onto the upper surface of the insulating layer overlaps or does not overlap with the projection of the grid nodes of the second touch electrode onto the upper surface of the insulating layer.

[0018] In some embodiments of the present invention, the first dummy electrode has a plurality of grid nodes, the second dummy electrode has a plurality of grid nodes, and the projection of the grid nodes of the first dummy electrode onto the upper surface of the insulating layer overlaps or does not overlap with the projection of the grid nodes of the second dummy electrode onto the upper surface of the insulating layer.

[0019] In some embodiments of the present invention, the insulating layer is a rigid substrate, a flexible substrate, or an adhesive layer. Attached Figure Description

[0020] Figure 1A This is a cross-sectional schematic diagram of a touch panel according to a first embodiment of the present invention.

[0021] Figure 1B for Figure 1A A top view of the touch panel.

[0022] Figure 1C for Figure 1B A top view of the first conductive mesh layer of the touch panel.

[0023] Figure 1D for Figure 1B A top view of the second conductive mesh layer of the touch panel.

[0024] Figure 2A This is a top view schematic diagram of the first conductive mesh layer of a touch panel according to a second embodiment of the present invention.

[0025] Figure 2B This is a top view schematic diagram of the second conductive mesh layer of a touch panel according to a second embodiment of the present invention.

[0026] Figure 3A This is a top view schematic diagram of the first conductive mesh layer of a touch panel according to a third embodiment of the present invention.

[0027] Figure 3B This is a top view schematic diagram of the second conductive mesh layer of a touch panel according to a third embodiment of the present invention.

[0028] Figure 4A This is a top view schematic diagram of the first conductive mesh layer of a touch panel according to the fourth embodiment of the present invention.

[0029] Figure 4B This is a top view schematic diagram of the second conductive mesh layer of a touch panel according to the fourth embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100: Touch panel

[0032] 110: First conductive mesh layer

[0033] 112: First touch electrode

[0034] 112a: Grid node

[0035] 112b: Grid lines

[0036] 114: First Dummy Electrode

[0037] 114a: Grid node

[0038] 114b: Grid lines

[0039] 120: Insulation layer

[0040] 130: Second conductive mesh layer

[0041] 132: Second touch electrode

[0042] 132a: Grid node

[0043] 132b: Grid lines

[0044] 134: Second Dummy Electrode

[0045] 134a: Grid node

[0046] 134b: Grid lines

[0047] G1, G2: Gap

[0048] UA, UA1, UA2: Unit area

[0049] A1, A21, A22, A23: Overlapping areas

[0050] 1A-1A: Line Detailed Implementation

[0051] The following drawings disclose several embodiments of the present invention. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simplified schematic manner in the drawings.

[0052] Figure 1A This is a cross-sectional schematic diagram of a touch panel 100 according to a first embodiment of the present invention. The touch panel 100 includes a first conductive mesh layer 110, a second conductive mesh layer 130, and an insulating layer 120. The insulating layer 120 separates the first conductive mesh layer 110 and the second conductive mesh layer 130. In this embodiment, the first conductive mesh layer 110 serves, for example, as a Y-axis (vertical axis) electrode of the touch panel 100, and the second conductive mesh layer 130 serves, for example, as an X-axis (horizontal axis) electrode of the touch panel 100.

[0053] Figure 1B for Figure 1A A top view of the touch panel 100. Specifically, Figure 1A For along Figure 1B Sectional view of line 1A-1A. Figure 1C for Figure 1B A top view schematic diagram of the first conductive mesh layer 110 of the touch panel 100. Also refer to... Figures 1A to 1CThe first conductive mesh layer 110 includes at least one first touch electrode 112 and at least one first dummy electrode 114, each having a plurality of meshes made of conductive material. The first touch electrode 112 and the first dummy electrode 114 are electrically separated from each other. Specifically, a gap G1 separates the first touch electrode 112 and the first dummy electrode 114. It should be further noted that the first conductive mesh layer 110 is formed by patterning a complete layer of conductive mesh material, wherein the area where the first touch electrode 112 is disposed is defined as a functional area, and the area where the first dummy electrode 114 is disposed is defined as a non-functional area.

[0054] In some embodiments, the first conductive mesh layer 110 is formed by arranging a plurality of unit regions UA1 in a matrix, wherein each unit region UA1 covers a first touch electrode 112 and two first dummy electrodes 114, with the first touch electrode 112 disposed between the two first dummy electrodes 114. The design of the first touch electrode 112 and the first dummy electrodes 114 will be described below with reference to only one unit region UA1.

[0055] The first touch electrode 112 has multiple grid nodes 112a (i.e., grid intersection points) and grid lines 112b (i.e., grid intersection lines) connecting the grid nodes 112a. In some embodiments, a complete grid is defined as a closed grid composed of four grid nodes 112a and four grid lines 112b, and two adjacent complete grids share two grid nodes 112a and one grid line 112b, or share one grid node 112a. In other words, two adjacent complete grids form a pattern of adjacent edges connected by two grid nodes 112a and one grid line 112b, or form a pattern of endpoints connected by one grid node 112a.

[0056] The grid nodes 112a of the first touch electrode 112 are periodically arranged, meaning that the positions of the grid nodes 112a are arranged according to specific rules. For example, in the horizontal axis, two adjacent grid nodes 112a are spaced apart by a first distance; while in the vertical axis, two adjacent grid nodes 112a are spaced apart by a second distance. The first distance may or may not be equal to the second distance, thereby ensuring that the grid nodes 112a are periodically arranged at least in the same axis. Overall, all grid nodes 112a are periodically arranged and distributed in a matrix pattern.

[0057] The grid lines 112b of the first touch electrode 112 are arranged regularly, meaning that the grid lines 112b are designed with the same line shape, such as straight lines, broken lines, arcs, curves, and cloud-shaped lines. In this embodiment, the line shape and length of the grid lines 112b of each complete grid of the first touch electrode 112 are consistent, making the shape of each complete grid of the first touch electrode 112 identical. In this embodiment, taking a straight grid line 112b as an example, the shape of the grid is rhomboid. Through this design, the overall capacitance and resistance values ​​of the first touch electrode 112 within different unit areas UA1 can be made consistent. It should be noted that the grid lines 112b in the first touch electrode 112 that do not form a complete grid have negligible influence on the overall capacitance and resistance values ​​of the first touch electrode 112 because they do not form a complete electrical connection with other complete grids.

[0058] As mentioned above, by periodically setting the grid nodes 112a and regularly setting the grid lines 112b, all the complete grids in the first touch electrode 112 are identical in shape and arranged regularly.

[0059] The first dummy electrode 114 has multiple grid nodes 114a (i.e., grid intersection points) and grid lines 114b (i.e., grid intersection lines) connecting the grid nodes 114a. The definition of a complete grid in the first dummy electrode 114 is the same as that of the first touch electrode 112, and will not be repeated here. The grid nodes 114a of the first dummy electrode 114 are periodically arranged and distributed in a matrix pattern, so that the node capacitance value of the first dummy electrode 114 in different unit areas UA1 is consistent. In addition, the grid lines 114b of the first dummy electrode 114 are irregularly arranged, that is, the first dummy electrode 114 is designed to include at least two grid lines 114b with different line shapes, wherein the line shape can include straight lines, broken lines, arcs, curves, and cloud-shaped lines. In this way, although the grid nodes 114a of all the complete grids of the first dummy electrode 114 are periodically arranged, the presence of at least two grid lines 114b with different shapes disrupts the overall consistency, resulting in at least two complete grids of the first dummy electrode 114 having different shapes. This avoids visual interference caused by regularly arranged grids, such as moiré patterns. In some embodiments, all the grid lines 114b of the first dummy electrode 114 are preferably randomly arranged from straight lines, broken lines, arcs, curves, and cloud-like lines, making the shape of all the complete grids of the first dummy electrode 114 more irregular and effectively reducing visual interference.

[0060] As described above, regarding the grid structure of the first touch electrode 112 and the first dummy electrode 114, the shape of at least one complete grid of the first dummy electrode 114 will differ from the shape of any complete grid of the first touch electrode 112. For example, the grid lines 114b of the first dummy electrode 114 include at least curved and cloud-shaped lines, while the grid lines 112b of the first touch electrode 112 are all straight lines. In this way, the overall grid appearance of the functional area and the non-functional area can be different, thereby creating a visual difference.

[0061] Figure 1D for Figure 1B The diagram shows a top view of the second conductive mesh layer 130 of the touch panel 100. The design of the second conductive mesh layer 130 in this embodiment is generally the same as that of the first conductive mesh layer 110, the difference being that they are electrode layers with different axes; therefore, the following description will be simplified. The second conductive mesh layer 130 includes at least one second touch electrode 132 and at least one second dummy electrode 134, each having a plurality of meshes made of conductive material. The second touch electrode 132 and the second dummy electrode 134 are electrically separated from each other. Specifically, a gap G2 separates the second touch electrode 132 and the second dummy electrode 134. Similarly, the second conductive mesh layer 130 is formed by patterning a complete layer of conductive mesh material, wherein the area where the second touch electrode 132 is arranged is defined as a functional area, and the area where the second dummy electrode 134 is arranged is defined as a non-functional area.

[0062] In some embodiments, the second conductive mesh layer 130 is formed by a plurality of unit regions UA2 arranged in a matrix, wherein each unit region UA2 covers one second touch electrode 132 and two second dummy electrodes 134, with the second touch electrode 132 disposed between the two second dummy electrodes 134. The design of the second touch electrode 132 and the second dummy electrodes 134 will be described below with reference to only one unit region UA2.

[0063] Similar to the first touch electrode 112, the second touch electrode 132 has multiple grid nodes 132a (i.e., grid intersection points) and grid lines 132b (i.e., grid intersection lines) connecting the grid nodes 132a. All grid nodes 132a of the second touch electrode 132 are periodically arranged and distributed in a matrix pattern. Furthermore, the grid lines 132b of the second touch electrode 132 are regularly arranged, meaning that the grid lines 132b are designed with the same line shape, such as straight lines, broken lines, arcs, curves, and cloud-shaped lines. In this embodiment, the line shape and length of the grid lines 132b of each complete grid of the second touch electrode 132 are consistent, making the shape of each complete grid of the second touch electrode 132 identical. In this embodiment, taking a straight grid line 132b as an example, the grid shape is rhomboid. This design ensures that the overall capacitance and resistance values ​​of the second touch electrode 132 within different unit areas UA2 are consistent. As mentioned above, by periodically setting the grid nodes 132a and regularly setting the grid lines 132b, all the complete grids in the second touch electrode 132 are made to have the same shape and are arranged regularly.

[0064] Similar to the first dummy electrode 114, the second dummy electrode 134 has multiple grid nodes 134a (i.e., grid intersection points) and grid lines 134b (i.e., grid intersection lines) connecting the grid nodes 134a. The grid nodes 134a of the second dummy electrode 134 are periodically arranged and distributed in a matrix pattern, ensuring that the nodal capacitance of the second dummy electrode 134 is consistent across different unit regions UA2. Furthermore, the grid lines 134b of the second dummy electrode 134 are irregularly arranged; specifically, the second dummy electrode 134 is designed to include at least two grid lines 134b with different line shapes, including straight lines, broken lines, arcs, curves, and cloud-shaped lines. In this way, although the grid nodes 134a of all complete grids of the second dummy electrode 134 are periodically arranged, the presence of at least two grid lines 134b with different line shapes disrupts the overall consistency, resulting in at least two complete grids of the second dummy electrode 134 having different shapes. This avoids visual interference caused by regularly arranged grids, such as moiré patterns.

[0065] As described above, regarding the grid structure of the second touch electrode 132 and the second dummy electrode 134, the shape of at least one complete grid of the second dummy electrode 134 differs from the shape of any complete grid of the second touch electrode 132. For example, the grid lines 134b of the second dummy electrode 134 include at least curved and cloud-shaped lines, while the grid lines 132b of the second touch electrode 132 are all straight lines. In this way, the overall grid appearance of the functional area and the non-functional area are different, thus creating a visual difference.

[0066] Reference Figure 1B When the first conductive mesh layer 110 and the second conductive mesh layer 130 are stacked vertically, in the direction perpendicular to the touch panel, only the overlapping area A1 where the first touch electrode 112 and the second touch electrode 132 intersect contains a complete mesh with a regular arrangement and identical shape. However, other overlapping areas, such as the overlapping area A21 where the first dummy electrode 114 intersects the second touch electrode 132 and the overlapping area A22 where the first touch electrode 112 intersects the second dummy electrode 134, have a layer of complete meshes with a regular arrangement but not identical shape, thus presenting an irregular visual effect. Furthermore, the overlapping area A23 where the first dummy electrode 114 intersects the second dummy electrode 134 has two layers of complete meshes with a regular arrangement but not identical shape, thus presenting an even more irregular visual effect. In some embodiments, the area of ​​the overlapping area A1 accounts for less than or equal to 5.7% of the total area of ​​a unit area (UA). Through the design of this embodiment, the overlapping area A1 occupies only a small area, and one overlapping area A1 is surrounded by overlapping areas A21 to A23 that present an irregular visual effect, so that multiple overlapping areas A1 can be effectively separated from each other, which helps to maintain the overall visual effect of the touch panel 100 and avoids the moiré pattern problem caused by regular graphic settings.

[0067] In some embodiments of the present invention, the grid nodes of the first conductive grid layer 110 and the second conductive grid layer 130 are staggered but do not overlap. For example, in the overlap region A1, the projection of the grid node 112a of the first touch electrode 112 onto the upper surface of the insulating layer 120 does not overlap with the projection of the grid node 132a of the second touch electrode 132 onto the upper surface of the insulating layer 120. In the overlap region A21, the projection of the grid node 114a of the first dummy electrode 114 onto the upper surface of the insulating layer 120 does not overlap with the projection of the grid node 132a of the second touch electrode 132 onto the upper surface of the insulating layer 120. In the overlap region A22, the projection of the grid node 112a of the first touch electrode 112 onto the upper surface of the insulating layer 120 does not overlap with the projection of the grid node 134a of the second dummy electrode 134 onto the upper surface of the insulating layer 120. In the overlapping region A23, the projection of the grid node 114a of the first dummy electrode 114 onto the upper surface of the insulating layer 120 does not overlap with the projection of the grid node 134a of the second dummy electrode 134 onto the upper surface of the insulating layer 120. This allows the overlapping regions A21-A23, which originally exhibit an irregular visual effect, to further create an irregular effect even when the grid nodes of the first conductive grid layer 110 and the second conductive grid layer 130 do not overlap. Of course, this should not limit the scope of the invention; in other embodiments, the grid nodes of the first conductive grid layer 110 and the second conductive grid layer 130 may overlap.

[0068] In some embodiments of the present invention, the first conductive mesh layer 110 and the second conductive mesh layer 130 may be formed, for example, from a copper layer through a patterning process of photolithography and etching. Alternatively, in other embodiments, they may be formed directly by printing using liquid metal ink for patterning. This should not be construed as limiting the scope of the present invention; in other embodiments, the conductive mesh material layer may be made of other metals or metal alloys with good conductivity, such as silver, nickel, or titanium-tungsten alloys.

[0069] In some embodiments of the present invention, the insulating layer 120 may be a rigid substrate, such as a glass substrate or a polyethylene terephthalate (PET) substrate. Alternatively, in some embodiments, the insulating layer 120 may be a suitable flexible substrate. For example, the insulating layer 120 may be a flexible polyethylene terephthalate (PET) or polyimide (PI) substrate. Furthermore, in some embodiments, the insulating layer 120 may also be an adhesive layer, such as an optical adhesive. In this case, if the insulating layer 120 is designed as an adhesive layer, in terms of the structure of the touch panel 100, the first conductive mesh layer 110 and the second conductive mesh layer 130 are, for example, first formed on a permanent or temporary carrier substrate (not shown), and then bonded together through the adhesive layer.

[0070] In this embodiment, the period of the grid nodes 114a of the first dummy electrode 114 is the same as the period of the grid nodes 112a of the first touch electrode 112. For example, in the horizontal axis, the spacing between two adjacent grid nodes 114a is approximately equal to the spacing between two adjacent grid nodes 112a; in the vertical axis, the spacing between two adjacent grid nodes 114a is approximately equal to the spacing between two adjacent grid nodes 112a. Similarly, the period of the grid nodes 134a of the second dummy electrode 134 is the same as the period of the grid nodes 132a of the second touch electrode 132. For example, in the horizontal axis, the spacing between two adjacent grid nodes 134a is approximately equal to the spacing between two adjacent grid nodes 132a; in the vertical axis, the spacing between two adjacent grid nodes 134a is approximately equal to the spacing between two adjacent grid nodes 132a. However, this should not be construed as limiting the scope of the invention; in other embodiments, the periods may differ.

[0071] Figure 2A This is a top view schematic diagram of a unit area UA1 of the first conductive mesh layer 110 of the touch panel 100 according to the second embodiment of the present invention. Figure 2B This is a top view schematic diagram of a unit area UA2 of the second conductive mesh layer 130 of the touch panel 100 according to a second embodiment of the present invention. This embodiment is similar to the first embodiment, except that: Figure 2AAs shown, in this embodiment, the period of the grid nodes 114a of the first dummy electrode 114 is different from the period of the grid nodes 112a of the first touch electrode 112; the period of the grid nodes 114a of the first dummy electrode 114 is greater than the period of the grid nodes 112a of the first touch electrode 112. Specifically, the period of the grid nodes 114a of the first dummy electrode 114 is twice the period of the grid nodes 112a of the first touch electrode 112, meaning that the spacing between two adjacent grid nodes 114a is twice the spacing between two adjacent grid nodes 112a, regardless of whether it is in the horizontal or vertical axis. Therefore, the period of the grid nodes 114a of each of the first dummy electrodes 114 in the unit region UA1 remains the same.

[0072] Similarly, such as Figure 2B As shown, the period of the grid nodes 134a of the second dummy electrode 134 is greater than the period of the grid nodes 132a of the second touch electrode 132. For example, the period of the grid nodes 134a of the second dummy electrode 134 is twice the period of the grid nodes 132a of the second touch electrode 132, meaning that the spacing between two adjacent grid nodes 134a is twice the spacing between two adjacent grid nodes 132a, regardless of whether it is in the horizontal or vertical axis. The period of the grid nodes 134a of each of the second dummy electrodes 134 in the unit area UA2 remains the same.

[0073] Other details of this implementation method are largely as described above and will not be repeated here.

[0074] Figure 3A This is a top view schematic diagram of a unit area UA1 of the first conductive mesh layer 110 of the touch panel according to the third embodiment of the present invention. Figure 3B This is a top view schematic diagram of a unit area UA2 of the second conductive mesh layer 130 of the touch panel according to a third embodiment of the present invention. This embodiment is similar to the first embodiment, except that: Figure 3A As shown, in this embodiment, the period of the grid nodes 114a of the first dummy electrode 114 is different from the period of the grid nodes 112a of the first touch electrode 112; the period of the grid nodes 114a of the first dummy electrode 114 is shorter than the period of the grid nodes 112a of the first touch electrode 112. Specifically, the period of the grid nodes 112a of the first touch electrode 112 is twice the period of the grid nodes 114a of the first dummy electrode 114, meaning that the spacing between two adjacent grid nodes 112a is twice the spacing between two adjacent grid nodes 114a, regardless of whether it is in the horizontal or vertical axis. Therefore, the period of the grid nodes 114a of each of the first dummy electrodes 114 in the unit region UA1 remains the same.

[0075] Similarly, such as Figure 3BAs shown, the period of the grid nodes 134a of the second dummy electrode 134 is less than the period of the grid nodes 132a of the second touch electrode 132. For example, the period of the grid nodes 132a of the second touch electrode 132 is twice the period of the grid nodes 134a of the second dummy electrode 134, meaning that the spacing between two adjacent grid nodes 132a is twice the spacing between two adjacent grid nodes 134a, regardless of whether it is in the horizontal or vertical axis. The periods of the grid nodes 134a of each of the second dummy electrodes 134 in the unit area UA2 remain the same.

[0076] Other details of this implementation method are largely as described above and will not be repeated here.

[0077] Figure 4A This is a top view schematic diagram of a unit area UA1 of the first conductive mesh layer 110 of the touch panel according to the fourth embodiment of the present invention. Figure 4B This is a top view schematic diagram of a unit area UA2 of the second conductive mesh layer 130 of the touch panel according to a fourth embodiment of the present invention. This embodiment is similar to the first embodiment, except that: Figure 4A As shown, in this embodiment, the grid lines 112b of the first touch electrode 112 are curved lines. The shape and size of each complete grid of the first touch electrode 112 remain the same. This design ensures that the overall capacitance and resistance values ​​of the first touch electrode 112 within different unit areas UA1 are consistent. Similarly, as... Figure 4B As shown, in this embodiment, the grid lines 132b of the second touch electrode 132 are curved lines. The shape and size of each complete grid of the second touch electrode 132 remain the same. With this design, the overall capacitance and resistance values ​​of the second touch electrode 132 in different unit areas UA2 can be made consistent.

[0078] In this embodiment, the period of the grid nodes 114a of the first dummy electrode 114 is the same as the period of the grid nodes 112a of the first touch electrode 112. For example, in the horizontal axis, the spacing between two adjacent grid nodes 114a is approximately equal to the spacing between two adjacent grid nodes 112a; in the vertical axis, the spacing between two adjacent grid nodes 114a is approximately equal to the spacing between two adjacent grid nodes 112a. Similarly, the period of the grid nodes 134a of the second dummy electrode 134 is the same as the period of the grid nodes 132a of the second touch electrode 132. For example, in the horizontal axis, the spacing between two adjacent grid nodes 134a is approximately equal to the spacing between two adjacent grid nodes 132a; in the vertical axis, the spacing between two adjacent grid nodes 134a is approximately equal to the spacing between two adjacent grid nodes 132a. However, this should not be construed as limiting the scope of the invention; in other embodiments, the periods may differ.

[0079] Other details of this implementation method are largely as described above and will not be repeated here.

[0080] In several embodiments of the present invention, the shape of the conductive mesh in the non-functional areas of at least one conductive mesh layer is designed to be irregular, which avoids moiré patterns caused by a uniform pattern across the entire layer. Furthermore, when the touch panel and display panel overlap, the design of these embodiments further prevents the conductive mesh of the touch panel's conductive mesh layer from overlapping with the pixels of the display panel, thus further reducing the chance of moiré patterns. In addition, although the shape of the conductive mesh in the non-functional areas is designed to be irregular, the mesh nodes are still designed to be periodically arranged and distributed in a matrix pattern, thereby maintaining the uniformity of the overall capacitance value of the touch panel and preventing dummy electrodes in the non-functional areas from affecting the judgment of touch sensing results.

[0081] Although the present invention has been disclosed above with respect to various embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A touch panel, characterized by, Comprising: a first conductive mesh layer comprising: at least one first touch electrode having a plurality of first touch meshes enclosed by a plurality of first touch nodes and a plurality of first touch lines; and at least one first dummy electrode having a plurality of first dummy meshes enclosed by a plurality of first dummy nodes and a plurality of first dummy lines, wherein the first dummy nodes are periodically arranged, and any of the first dummy meshes has at least two first dummy lines with different line shapes, the first touch electrode and the first dummy electrode are electrically separated from each other, wherein the first touch meshes of the first touch electrode have the same shape, and at least two of the first dummy meshes of the first dummy electrode have different shapes; a second conductive mesh layer comprising: at least one second touch electrode having a plurality of second touch meshes enclosed by a plurality of second touch nodes and a plurality of second touch lines; and at least one second dummy electrode having a plurality of second dummy meshes enclosed by a plurality of second dummy nodes and a plurality of second dummy lines, the second touch electrode and the second dummy electrode are electrically separated from each other, wherein the second touch meshes of the second touch electrode have the same shape, and at least two of the second dummy meshes of the second dummy electrode have different shapes; and an insulating layer separating the first conductive mesh layer and the second conductive mesh layer, the at least one first touch electrode and the at least one first dummy electrode are arranged along an X-axis direction, the at least one second touch electrode and the at least one second dummy electrode are arranged along a Y-axis direction, and the X-axis direction is perpendicular to the Y-axis direction.

2. The touch panel of claim 1, wherein, wherein at least one of the first dummy meshes of the first dummy electrode has a shape different from any of the first touch meshes of the first touch electrode.

3. The touch panel of claim 1, wherein, the periods of the first dummy nodes of the first dummy electrode are the same as or different from the periods of the first touch nodes of the first touch electrode.

4. The touch panel of claim 1, wherein, wherein the second dummy nodes of the second dummy electrode are periodically arranged.

5. The touch panel of claim 1, wherein, wherein at least one of the second dummy meshes of the second dummy electrode has a shape different from any of the second touch meshes of the second touch electrode.

6. The touch panel of claim 1, wherein, the periods of the second dummy nodes of the second dummy electrode are the same as or different from the periods of the second touch nodes of the second touch electrode.

7. The touch panel of claim 1, wherein, the projections of the first touch mesh nodes of the first touch electrode on an upper surface of the insulating layer overlap or do not overlap the projections of the second touch mesh nodes of the second touch electrode on the upper surface of the insulating layer.

8. The touch panel of claim 1, wherein, the projections of the first dummy nodes of the first dummy electrode on an upper surface of the insulating layer overlap or do not overlap the projections of the second dummy nodes of the second dummy electrode on the upper surface of the insulating layer.

9. The touch panel of claim 1, wherein, wherein the insulating layer is a rigid substrate, a flexible substrate, or an adhesive layer.

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