Touch panel with node-free pattern

Abstract

A touch panel with a nodeless pattern mainly comprises a light-transmitting substrate and two sensing electrodes, wherein the two sensing electrodes are opposite to each other through the light-transmitting substrate, and the metal grids of the two sensing electrodes each comprise a non-conductive nodeless pattern, wherein the angles between the metal lines with sensing functions are randomly arranged under specific conditions, thereby reducing the area of ​​the node, thereby effectively reducing or eliminating the diffraction effect at the node, and furthermore, the metal grids of the two sensing electrodes opposite to each other and the non-conductive nodeless pattern can be interlaced with each other to form an interlaced pattern composed of irregular polygons, thereby achieving the purpose of not generating interference fringes when used with display panels of various mainstream sizes.

Description

Technical Field

[0001] A touch panel with a nodeless pattern, in particular, a touch panel that can improve the recognition of touch signals while effectively reducing the generation of interference fringes. The sensing electrode only needs to be made of a thin film mask, so there is no need to use a glass mask, which effectively saves production costs. In particular, when used with display panels of various mainstream sizes, no interference fringes are generated. Background Art

[0002] When the metal grid of the touch panel is applied together with the display panel, the so-called interference fringes are easily generated, which affects the display quality of the picture. The interference fringes are generated because the metal grid pattern shape, arrangement and line width of the metal grid affect the transmittance. When adjacent stripe patterns are arranged regularly with each other, optical interference fringes will be generated. In order to effectively prevent optical phenomena such as interference fringes, such as the so-called Moire effect, it is very effective to make the line width of the metal grid between 1 micron and 3 microns, and adjust the shape angle or arrangement of the metal grid.

[0003] Another reason is that when the touch panel and the display panel are bonded together, the metal grid of the touch panel and the thin-film transistor array (TFT array) of the display panel (such as the black matrix or RGB pixel arrangement) are both arranged in a regular grid. Therefore, when the patterns of the two regular grid arrangements overlap, optical interference fringes will also be generated.

[0004] In order to avoid or reduce the occurrence of interference fringes, the line width of the conductor can be between 1 micron and 3 microns. Such a fine line width must be produced by a high-resolution glass mask, but the glass mask is expensive, resulting in increased initial development and manufacturing costs.

[0005] Therefore, the film mask (ref. Figure 1A ) is used to make it, but the thin film mask 1a has a lower resolution than the glass mask, so compared with the glass mask, the intersection of the lines will be enlarged, and the metal grid 1b (such as Figure 1B ), the line width is only between 5 and 8 microns, and many nodes N are formed at the intersections of the lines. As mentioned above, the line width produced by the thin film mask 1a is larger, so the area of ​​the node is larger, and each node is in the uniform shape of a right cross. Therefore, when the light reaches the node, diffraction is likely to occur, which affects the transmittance and seriously affects the display effect.

[0006] Referring to the case of Taiwan Invention Patent Publication No. I601043, "Touch Panel with Metal Lines without Sensing Function", it mainly includes a light-transmitting substrate and two sensing electrodes, the two sensing electrodes are opposite to each other across the light-transmitting substrate, the metal grids of the two sensing electrodes each include metal lines with sensing function and metal lines without sensing function, and the opposing metal grids also form interlaced lines; the purpose of the case is to avoid the diffraction effect, and the technical means adopted in the case is to increase the area of ​​each grid of the metal grid (that is, increase the grid density), thereby reducing the number of nodes, however, the reduction in the number of nodes means that the number of locations emitting the diffraction effect is reduced, but the area of ​​the node itself is not reduced, and the diffraction effect may still occur.

[0007] In addition, in this case, although the "metal lines with sensing function" and "metal lines without sensing function" are interlaced to form a grid pattern that is invisible to the naked eye, the two are regular grid patterns in themselves, so the interlacing is still a regular grid pattern, that is, the intervals between the metal lines are fixed. Therefore, when they are attached to display panels of different specifications, interference fringes will occur with certain specifications of black matrices (Black Matrix) and color filter layers. Therefore, it is necessary to design a metal grid with different arrangement intervals. However, this will bring about the problem of higher production costs, and there is also the problem of diffraction effect at the nodes that needs to be overcome. Summary of the invention

[0008] The main purpose of the present invention is to provide a touch panel design method that can reduce the generation of interference fringes while improving touch sensitivity. In addition, a low-cost film mask can be used to make a metal grid, which can be particularly used in conjunction with display panels of various resolutions.

[0009] The invention mainly provides a technical means for reducing the diffraction effect occurring at the node, that is, the angles between the two lines constituting the node are not equal, wherein the angles are within an appropriate angle range, but the angles can be determined in a random manner within the appropriate angle range, such as selecting different angles, so that the shapes of the nodes are slightly different and the area at the node is reduced, so that the chance of the diffraction effect occurring at the node can be effectively reduced, so that the nodes of the metal grid and the nodes of the metal grid will not be exactly aligned with the black matrix (Black Matrix) and the color filter layer of the display, that is, because the shape of each node of the metal grid with sensing function of the present invention is not a single right cross shape, it can effectively reduce or eliminate the diffraction effect occurring at the node. In addition, each line constituting the metal grid will also have a little curvature, slope, etc., which is close to a straight line, so it will not correspond exactly to the regularly and orderly arranged black matrix (Black Matrix) and color filter. Therefore, by utilizing the technical means of reducing the diffraction effect at the node of the present invention, it can be applied to various mainstream displays without generating interference fringe effects.

[0010] The present invention also provides a means of forming a grid density invisible to the naked eye with a nodeless pattern. The present invention further configures a nodeless pattern in a metal grid with a sensing function. The metal grid with a sensing function is formed by solid and continuous lines to sense whether a physical quantity changes, such as a change in capacitance. The nodeless pattern is formed by discontinuous lines or discontinuous multiple lines to form a cross-shaped or tic-tac-toe-shaped pattern. The nodeless pattern does not have nodes and is not connected to the metal grid with a sensing function. Therefore, the nodeless pattern is non-conductive and has no sensing function. Its main purpose is to increase the overall grid density of the sensing electrode, that is, when the touch panel and the display panel are attached, a grid density invisible to the naked eye is formed.

[0011] To achieve the above object, the touch panel with nodeless pattern of the present invention comprises a transparent substrate; a first sensing electrode, which is disposed on a first surface of the transparent substrate and extends along a first direction, the first sensing electrode comprises a plurality of first metal grids, the first metal grids comprise a plurality of nodes, the angle formed by any two lines constituting the nodes in the first metal grids is within an appropriate angle range and is determined by a random number within the above range, the first metal grids are further configured with a first pattern, the first patterns in the first metal grids do not intersect with the first metal grids, and the first pattern itself does not have any nodes; a second sensing electrode, which is disposed on a second surface of the transparent substrate and extends along a second direction, the first surface and the second surface need to correspond to each other, the second sensing electrode comprises a plurality of second metal grids, the second metal grids comprise a plurality of nodes, the angle formed by any two lines constituting the nodes in the second metal grids is within an appropriate angle range and is determined by a random number within the above range, the second metal grids are further configured with a second pattern, the second patterns in the second metal grids do not intersect with the second metal grids, and the second pattern does not have any nodes.

[0012] The first metal grid and the first pattern therein, and the second metal grid and the second pattern therein are vertically opposite to each other and interlaced with each other through the transparent substrate to form a staggered pattern, which includes a plurality of irregular polygons.

[0013] The present invention also has the following features: in this case, the mesh spacing between the first metal mesh and the second metal mesh is increased to more than 2.4 mm. As the mesh spacing becomes larger, the change in capacitance value can be increased, thereby achieving the purpose of improving the recognition of touch signals; in addition, first patterns and second patterns that can be interlaced and non-conductive are arranged between the first metal mesh and the second metal mesh. The above paragraph mentions that the mesh width of the first metal mesh or the second metal mesh is increased to improve the recognition of touch signals. However, only increasing the mesh width will cause the metal mesh width to be too large and the existence of the mesh can be easily perceived by the naked eye. The non-conductive first pattern and the second pattern are arranged in the first metal mesh and the second metal mesh, so that the mesh density of the first sensing electrode and the second sensing electrode is just kept at a level that is not perceived by the naked eye.

[0014] Since the nodeless pattern is not connected to the metal grid, the number of nodes is reduced, and the first metal grid and the first non-conductive pattern and the second metal grid and the second non-conductive pattern mentioned in the previous paragraph are only interlaced in relative relationship, but are not actually in the same layer and therefore no nodes are generated. Therefore, there is no need to use a high-resolution glass mask, and a thin film mask (such as a film) can be used to produce a metal grid with very few nodes, which greatly improves the transmittance and effectively enhances the display effect. Since the cost of a thin film mask is much lower than that of a glass mask, the production cost can also be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A FIG. 1 is a schematic diagram of a thin film mask in the prior art.

[0016] Figure 1B Schematic diagram of a metal grid made by a film mask exposure, development and etching process in the prior art

[0017] Figure 2 FIG. 4 is a schematic diagram of a touch panel having a node-free pattern according to the present invention.

[0018] Figure 3A FIG. 4 is a schematic diagram of an enlarged first sensing electrode and a local area A thereof. The local area A shows an implementation of a first pattern.

[0019] Figure 3B FIG. 4 is a schematic diagram of an enlarged second sensing electrode and a local area B thereof. The local area B shows an implementation of the second pattern.

[0020] Figure 3C for Figure 3A and Figure 3B An enlarged schematic diagram of the interlaced pattern formed by each other.

[0021] Figure 4A FIG. 4 is a schematic diagram of an enlarged first sensing electrode and a local area A thereof. The local area A shows another implementation of the first pattern.

[0022] Figure 4B FIG. 4 is a schematic diagram of an enlarged second sensing electrode and its local area B. The local area B shows another implementation of the second pattern.

[0023] Figure 4C for Figure 4A and Figure 4B An enlarged schematic diagram of the interlaced pattern formed by each other.

[0024] Figure 5 It is a schematic diagram of a best embodiment of the first pattern, the second pattern, and the interlaced pattern formed by the first pattern and the second pattern.

[0025] Fig. 6AA schematic diagram of an embodiment of a node and an angle formed between two lines forming the node.

[0026] Figure 6B A schematic diagram of another embodiment of a node and an angle formed between two lines forming the node. DETAILED DESCRIPTION

[0027] The following is a more detailed description of the embodiments of the present invention with reference to the accompanying drawings and element symbols, so that those skilled in the art can implement the embodiments according to the embodiments after reading the specification.

[0028] See also Figure 2 , Figure 2 FIG. 1 is a schematic diagram of a touch panel having a node-free pattern according to the present invention. Figure 2 As shown, the touch panel 1 with a node-free pattern of the present invention at least includes a transparent substrate 10, a first sensing unit 11 and a second sensing unit 12, wherein the transparent substrate 10 includes a visible touch area V and a peripheral circuit area L, wherein the peripheral circuit area L is between the edge of the transparent substrate 10 and the visible touch area V, the visible touch area V is a non-edge area of ​​the transparent substrate 10, and the peripheral circuit area L is an edge area of ​​the transparent substrate 10, that is, the visible touch area V is farther from the edge of the transparent substrate 10 than the peripheral circuit area L, or the peripheral circuit area L surrounds the visible touch area V.

[0029] The transparent substrate 10 can be a hard substrate or a flexible substrate; the material of the hard substrate can be glass, tempered glass, sapphire, ceramic or other suitable materials; the material of the flexible substrate can be a polymer material. The polymer material is, for example, polyethylene (PE), polypropylene (PP), polystyrene (PS), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), nylon (Nylon), polycarbonate (PC), polyurethane (PU), polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), polyimide (Polyimide, PI), acrylic resin or a mixed material of polymethyl methacrylate and polycarbonate. The touch panel formed by the flexible substrate can be flexible, and thus is suitable for coating on a flexible surface or any flexible object that requires a touch function, such as a flexible substrate formed of other suitable materials for a display panel.

[0030] The first sensing unit 11 and the second sensing unit 12 are disposed on a first surface and a second surface of the light-transmitting substrate 10. The first surface and the second surface need to correspond to each other, such as corresponding upper surfaces and lower surfaces. They can also be disposed on upper surfaces or lower surfaces of different light-transmitting substrates 10 and then bonded together according to their relative positions with optical adhesive (not shown in the figure). Therefore, as long as part or all of the first sensing unit 11 and the second sensing unit 12 are at corresponding relative positions, the purpose of the present invention can be achieved by disposing the first sensing unit 11 and the second sensing unit 12 on a single substrate or multiple substrates.

[0031] See also Figure 3A , Figure 3A is a schematic diagram of the first sensing electrode and its local area A after enlargement. Figure 2 As shown, Figure 2 The first sensing unit 11 is schematically shown to extend axially along a first direction Y. The first sensing unit 11 includes a plurality of first sensing electrodes 111 and a plurality of first metal leads 113. The first sensing electrodes 111 are located in the visible touch area V and extend axially along the first direction Y. The first metal leads 113 are located in the peripheral circuit area L. The first sensing electrodes 111 are electrically connected to the first metal leads 113.

[0032] Two adjacent first sensing electrodes 111 are not connected to each other. Figure 2 The vertical dotted line in FIG. 1 indicates that there is a gap between two adjacent first sensing electrodes 111. Figure 2 FIG. 1 is a macroscopic diagram of a touch panel with a nodeless pattern. The actual structure of the first sensing electrode 111 is shown in the enlarged schematic diagram of a local area A in FIG. 3 . As shown in the local area A, the first sensing electrode 111 includes a plurality of first metal meshes 111A, wherein a first metal mesh 111A has four nodes, and the nodes are formed by the intersection of metal lines. The two lines constituting the nodes in the first metal mesh 111A are generally non-straight lines (some straight lines can also be arranged therein), wherein each of the first metal meshes 111A is further configured with a first pattern 111B, and the first patterns 111B in the first metal meshes 111A do not intersect with the first metal meshes 111A, and the first pattern 111 itself does not have any nodes; preferably, the first pattern 111 is a pattern composed of a plurality of intersecting lines but without nodes, and the first pattern does not have any nodes (intersections), but when configured in each of the first metal meshes 111A, it can form an average and denser mesh pattern together with the first metal meshes 111A.

[0033] See also Figure 3B , Figure 3Bis a schematic diagram of the second sensing electrode and its local area B after enlargement. Figure 2 As shown, Figure 2 The second sensing unit 12 is schematically shown to extend axially along a second direction X. The second sensing unit 12 includes a plurality of second sensing electrodes 121 and a plurality of second metal leads 123 . The second sensing electrodes 121 are located in the visible touch area V, and the second metal leads 123 are located in the peripheral circuit area L. The second sensing electrodes 121 are electrically connected to the second metal leads 123 .

[0034] Two adjacent second sensing electrodes 121 are not connected to each other. Figure 2 The horizontal dotted line in FIG. 1 indicates that there is a gap between two adjacent second sensing electrodes 121. Figure 2 FIG. 1 is a macroscopic diagram of a touch panel having a node-free pattern, and the actual structure of the second sensing electrode 121 is shown in FIG. Figure 3B FIG. 1 is an enlarged schematic diagram of a local area B of FIG. As shown in the local area B, the second sensing electrode 121 includes a plurality of second metal meshes 121A, wherein a second metal mesh 121A also includes a plurality of nodes, wherein the nodes are formed by interlacing a plurality of lines, and any two lines constituting the nodes in the second metal mesh 121A are generally non-straight lines, wherein the second metal mesh 121A is further configured with a second pattern 121B, wherein the second patterns 121B in the second metal mesh 121A do not intersect with the second metal mesh 121A, and the second pattern 121B itself does not have any nodes; preferably, the second pattern is also a pattern formed by interlacing a plurality of lines but without nodes, and the second pattern 121B does not have any nodes (intersections), but can form an average and denser mesh pattern together with the second metal mesh 121A when viewed as a whole.

[0035] Preferably, the first pattern and the second pattern are cross patterns or tic-tac-toe patterns without any nodes.

[0036] like Figure 3A or Figure 3B In the embodiment, the first pattern and the second pattern are both tic-tac-toe patterns; and Figure 4A or Figure 4BIt shows that both the first pattern and the second pattern are cross patterns; when the first pattern and the second pattern are tic-tac-toe patterns, the mesh density of the first metal grid and the second metal grid is lower (compared to the cross pattern), and the impedance is higher. The higher the impedance, the higher the touch sensitivity. Therefore, it can be used together with a conventional touch chip; when the first pattern and the second pattern are cross patterns, the mesh density is higher (compared to the tic-tac-toe pattern), and the impedance of the first metal grid and the second metal grid is lower. The lower the impedance, the lower the touch sensitivity. Therefore, it must be used together with a touch sensing chip with better sensing function.

[0037] Please also note that the material of the first metal grid or the second metal grid 121A is at least one of copper, gold, aluminum, copper, silver, chromium, titanium, molybdenum, neodymium, nickel and alloys of the above metals; the first metal grid 111A or the second metal grid 121A is exposed using a film mask or a glass mask.

[0038] See also Figure 3C , Figure 3C for Figure 3A and Figure 3B For an enlarged schematic diagram of the interlaced pattern formed by Figure 4C , Figure 4C for Figure 4A and Figure 4B The first sensing unit 11 and the second sensing unit 12 are arranged in a vertical, left-right or diagonal relative relationship, such as Figure 3C As shown in the figure, the first metal grid 111A and the second metal grid 121A are relatively arranged in a staggered relationship, so the first metal grid 111A and the second metal grid 121A will form a grid with a lower density and substantially equal spacing when staggered; and the first pattern and the second pattern are also staggered into an irregular geometric figure (from a top view), but from a side view, they are actually only visually staggered (through the transparent substrate 10); and as shown in the embodiment of the fifth figure, the first pattern and the second pattern are staggered with each other A grid with a high density and approximately equal spacing will be formed. Therefore, overall, the relative configuration relationship of the first metal grid 111A and the second metal grid 121A that is staggered with each other forms a staggered pattern with high density that is invisible to the naked eye. The staggered pattern includes a plurality of irregular polygonal patterns, that is, the staggered pattern includes a plurality of irregular triangles, a plurality of irregular quadrilaterals, a plurality of irregular pentagons and a plurality of irregular hexagons, and the irregular radial patterns are irregularly distributed in the staggered pattern, and the above-mentioned polygons of different shapes are irregularly scattered in the staggered pattern.

[0039] Specifically, a plurality of irregular triangles, a plurality of irregular trapezoids, a plurality of irregular pentagons and a plurality of irregular hexagons are formed by interlacing the first metal grid 111A and the second metal grid 121A; and an irregular radial pattern is formed by interlacing the first pattern and the second pattern.

[0040] The mesh width of the first metal mesh or the second metal mesh with a tic-tac-toe pattern is between 3.6 and 5.4 mm, the mesh width of the first metal mesh or the second metal mesh with a cross pattern is between 2.4 and 3.6 mm, and the distance between any two adjacent lines in the tic-tac-toe and cross-shaped first and second patterns is 1.2 to 1.8 mm; in addition, the wire widths of the first metal mesh, the second metal mesh, the first pattern and the second pattern are between 3 and 12 um.

[0041] In one embodiment of the present invention, the angle between any two lines constituting the node in the first metal grid is within an appropriate angle range and different selections and combinations are made within the above-mentioned appropriate angle range; the angle between any two lines constituting the node in the second metal grid is also within an appropriate angle range and different selections and combinations are made within the above-mentioned appropriate angle range, the above-mentioned appropriate angle range is 75 to 125 degrees, the preferred angle range is 77 to 123 degrees, and the best angle range is 80 to 120 degrees; for example, Fig. 6A In the example, when any two lines intersect, there are 4 angles formed, and the angles of the four angles can be different. For example, θ1~θ4 can be 70 degrees, 110 degrees, 80 degrees, and 100 degrees respectively, which is exactly 360 degrees after matching; or Figure 6B θ1~θ4 are selected as 95 degrees, 85 degrees, 65 degrees, and 115 degrees respectively. The line connecting two nodes is not a straight line but a line that is approximately a straight line with a curvature or slope, so that the staggered pattern contains irregular shapes.

[0042] In addition, although the first pattern or the second pattern has no nodes, the angle between any two adjacent lines constituting the first pattern or the second pattern can be further configured to be within an appropriate angle range and different selections and combinations can be made within the above-mentioned appropriate angle range. The above-mentioned appropriate angle range is 75 to 125 degrees, the preferred angle range is 77 to 123 degrees, and the best angle range is 80 to 120 degrees; in this way, the staggered pattern can be composed of a more irregular polygonal pattern, but the overall staggered pattern still has a certain regularity, because the angle is randomly distributed within a specific range, and the overall staggered pattern is a grid pattern composed of irregular polygons.

[0043] Preferably, each line constituting the first pattern is substantially parallel to the first metal grid, and each line constituting the second pattern is substantially parallel to the second metal grid; most preferably, each line constituting the first pattern is not parallel to the first metal grid, wherein the relative intersection angle between each line constituting the first pattern and the lines constituting the first metal grid is between 30 and 60 degrees, and each line constituting the second pattern is not parallel to the second metal grid, wherein the relative intersection angle between each line constituting the second pattern and the lines constituting the second metal grid is between 30 and 60 degrees (refer to Figure 5 As shown), the interlaced pattern is made more irregular, so that the interference fringe effect can be avoided more effectively. In addition, both the first pattern and the second pattern include a cross pattern and a tic-tac-toe pattern; wherein, through appropriate arrangement and configuration, the cross-shaped first pattern can be interlaced with the tic-tac-toe second pattern, and vice versa; through this arrangement and configuration, the interlaced pattern is made more irregular and irregular, so that the interference fringe effect can be avoided effectively.

[0044] Alternatively, the first pattern and the second pattern of the tic-tac-toe pattern are surrounded by the first pattern and the second pattern of the cross shape, such as Figure 2 For example, the first and second patterns in a tic-tac-toe shape are in the visible touch area V and are arranged along the peripheral line area L. According to the above principle, the first and second patterns in a cross shape can also surround the first and second patterns in a tic-tac-toe shape.

[0045] Through the above method, the shapes of the nodes of the metal grid with sensing function of the present invention are mostly non-perpendicular cross shapes. Of course, some perpendicular cross nodes can be interspersed to reduce the area of ​​the nodes and more effectively reduce the chance of diffraction effect occurring at the nodes. With the irregular polygonal staggered pattern formed by the angle selection and non-straight lines, each node and the irregular metal grid will not be exactly aligned with the regularly arranged black matrix and color filter layer on the display, and can be applied to various mainstream displays without generating interference fringe effects.

[0046] As described above, the mesh width (cross shape) of the first metal mesh 111A or the second metal mesh 121A can be increased to above 2.4 mm, or can be further increased to above 3.6 mm (tic-tac-toe shape), thereby further increasing the variation of the capacitance value and achieving the purpose of improving the touch signal recognition.

[0047] In addition, the present invention also has the feature that the first pattern and the second pattern that can be interlaced with each other are respectively arranged in the first metal grid 111A and the second metal grid 121A. The above paragraph mentions that the mesh width of the first metal grid 111A or the second metal grid 121A is increased to improve the touch signal recognition. However, only increasing the mesh width will make the metal grid easily perceived by the naked eye. Therefore, the first pattern and the second pattern are arranged in the first metal grid 111A and the second metal grid 121A, so that the mesh density of the first sensing electrode 111 and the second sensing electrode 121 is kept at a level that is not perceived by the naked eye.

[0048] In addition, since the first pattern and the second pattern are not connected to the metal grid, the number of nodes is reduced. Although the first metal grid 111A and the first pattern and the second metal grid 121A and the second pattern mentioned in the previous paragraph seem to constitute many mutually interlaced nodes when viewed from above, the first metal grid 111A and the second metal grid 121A are separated by a transparent substrate and are not actually nodes. Since they are not actual nodes, there will be no phenomenon of node expansion. Therefore, there is no need to use a high-resolution glass mask. A metal grid with very few nodes can be produced by using a thin film mask (such as a film), which greatly improves the transmittance and effectively enhances the display effect. Since the cost of a thin film mask is much lower than that of a glass mask, the production cost can also be effectively reduced.

[0049] In summary, the present invention has indeed achieved a touch panel design method that can reduce the generation of interference fringes while improving touch sensitivity, and is manufactured using a thin film mask, which can also reduce manufacturing costs.

[0050] Since the technology of the present invention has not been seen in published publications, journals, magazines, media, and exhibitions, it is novel and can break through the current technical bottleneck and be implemented, which is indeed progressive. In addition, the present invention can solve the problems of the existing technology, improve the overall efficiency, and achieve the value of industrial application.

[0051] The above description is only used to explain the preferred embodiments of the present invention, and is not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention under the same inventive spirit should still be included in the scope of protection intended by the present invention.

[0052] The reference numerals are described as follows:

[0053] 1 Touch panel with no-node pattern

[0054] 10 Transparent substrate

[0055] 11. First sensing unit

[0056] 12 Second sensing unit

[0057] 111 First sensing electrode

[0058] 111A First Metal Grid

[0059] 111B First Pattern

[0060] 113 first metal lead

[0061] 121 second sensing electrode

[0062] 121A Second Metal Grid

[0063] 121B Second pattern

[0064] 123 Second metal lead

[0065] A, B, C local area

[0066] V Visual touch area

[0067] L Peripheral line area

[0068] X first direction

[0069] Y Second direction

[0070] 1a Pellicle mask

[0071] 1b Metal grid

Claims

1. A touch panel having a node-free pattern, characterized in that: Include: a light-transmissive substrate; a first sensing electrode, disposed on a first surface of the transparent substrate and extending along a first direction, the first sensing electrode comprising a plurality of first metal grids, the first metal grids comprising a plurality of nodes, the angle formed by any two lines constituting the nodes in the first metal grids being within an appropriate angle range and determined in a random manner within the appropriate angle range, the appropriate angle range being between 75 and 125 degrees, the first metal grids being further configured with a first pattern, the first patterns in the first metal grids not intersecting with the first metal grids, and the first pattern itself not having any nodes; a second sensing electrode, disposed on a second surface of the transparent substrate and extending along a second direction, the first surface and the second surface need to correspond to each other, the second sensing electrode includes a plurality of second metal grids, the second metal grids include a plurality of nodes, the angle formed by any two lines constituting the nodes in the second metal grids is within an appropriate angle range and is determined in a random manner within the appropriate angle range, the appropriate angle range is between 75 and 125 degrees, a second pattern is further configured in each of the second metal grids, the second patterns in the second metal grids do not intersect with the second metal grids, and the second pattern does not have any nodes; Wherein, the first pattern and the second pattern at least include a cross pattern or a tic-tac-toe pattern without any nodes; The mesh width of the first metal mesh or the second metal mesh having the tic-tac-toe pattern is between 3.6 and 5.4 mm; The first metal grid and the first pattern therein, and the second metal grid and the second pattern therein are arranged opposite to each other up and down through the transparent substrate and staggered to form a staggered pattern, which includes a plurality of irregular polygons and a plurality of irregular radial patterns.

2. The touch panel having a node-free pattern according to claim 1, wherein: The first pattern and the second pattern, both of which are cross-shaped patterns or tic-tac-toe-shaped patterns, are opposite to each other and intertwined with each other, or the first pattern, which is a cross-shaped pattern, can intertwine with the second pattern, which is a tic-tac-toe-shaped pattern.

3. The touch panel having a node-free pattern according to claim 1, wherein: The mesh width of the first metal mesh or the second metal mesh with the cross pattern is between 2.4 and 3.6 mm, and the distance between any two adjacent lines in the first and second patterns of the tic-tac-toe and cross shapes is between 1.2 and 1.8 mm.

4. The touch panel having a node-free pattern according to claim 1, wherein: The staggered pattern includes a plurality of irregular triangles, a plurality of irregular quadrilaterals, a plurality of irregular pentagons and a plurality of irregular hexagons, and a plurality of irregular radial patterns are irregularly distributed in the staggered pattern.

5. The touch panel having a node-free pattern according to claim 1, wherein: The lines constituting the nodes in the first metal grid or the second metal grid are mainly composed of lines with curvature or slope.

6. The touch panel having a node-free pattern according to claim 1, wherein: The angle formed by any two adjacent lines in the first pattern or the second pattern is within a proper angle range and is arranged in a random manner within the proper angle range, and the proper angle range is between 75 and 125 degrees.

7. The touch panel having a node-free pattern according to claim 1, wherein: Each line constituting the first pattern is substantially parallel to the first metal grid, and each line constituting the second pattern is substantially parallel to the second metal grid.

8. The touch panel having a node-free pattern according to claim 1, wherein: Each line constituting the first pattern is not parallel to the first metal grid, and each line constituting the second pattern is not parallel to the second metal grid.

9. The touch panel having a node-free pattern according to claim 1, wherein: The first pattern includes a cross pattern and a tic-tac-toe pattern, and the second pattern also includes a cross pattern and a tic-tac-toe pattern. However, the first tic-tac-toe pattern and the second pattern surround the first cross pattern and the second pattern.

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