Touch panel with reduced parasitic capacitance

Abstract

A touch panel capable of reducing parasitic capacitance. Conventional touch panels have all sensing electrode strips that are charged. Therefore, when sensing electrode strips from different layers intersect, parasitic capacitance increases as the area of ​​the intersection increases. The present invention, however, intersperses uncharged dummy sensing electrode strips between the sensing electrode strips. Consequently, when sensing electrode strips from different layers intersect, a portion of the intersection becomes uncharged dummy sensing electrode strips. Consequently, the intersecting area can be reduced, effectively reducing parasitic capacitance and improving touch sensitivity.

Description

Technical Field

[0001] A touch panel, in particular a touch panel capable of reducing parasitic capacitance. Background Art

[0002] When a touch device is installed on a liquid crystal display panel, the panel uses an ITO conductor coating to form a capacitor. Since the liquid crystal display cannot have through holes like a printed circuit board during coating, an insulating medium layer is plated on top, or an insulating medium layer is laid before a second conductor layer is plated on top.

[0003] Because array capacitors inevitably have interlaced wires, the interlaced portions easily form a very high parasitic capacitance, which can easily affect touch characteristics. Therefore, how to reduce parasitic capacitance is an important issue in improving the sensitivity of touch panels.

[0004] It is well known that the capacitance value is proportional to the area A of the conductive plate and the dielectric constant (permittivity), and inversely proportional to the distance d between the conductive plates. Therefore, the prior art mainly achieves the purpose of reducing parasitic capacitance by controlling the dielectric constant and the distance between the conductive plates.

[0005] Taiwan Invention Patent Publication No. I646451, "Touch Panel and Method of Manufacturing Touch Panel," discloses a method for increasing the distance between guide plates to reduce parasitic capacitance. By sandwiching multiple thin film layers between the display panel and the touch sensor, the distance between the display panel and the touch sensor is increased. This reduces parasitic capacitance between the wiring or electrodes that make up the display panel and the wiring or electrodes that make up the touch sensor. Consequently, the adverse effect of noise generated when driving the display panel, which can affect the touch sensor and reduce its detection sensitivity, is suppressed.

[0006] The thin film layer or adhesive layer is preferably made of a material with a low relative dielectric constant. By using such a thin film layer, the parasitic capacitance between the touch sensor and the display panel can be reduced, thereby reducing the number of thin film layers 113 stacked.

[0007] In addition, in the touch screen case of Taiwan Invention Patent Publication No. I644243, a slot is included in the dielectric layer. The slot is located between the first portion of the peripheral trace and the indicator portion. The dielectric constant of the dielectric in the slot is smaller than the dielectric constant of the dielectric layer, so that the parasitic capacitance at the intersection of the peripheral trace and the indicator portion is smaller. For example, the parasitic capacitance formed by the user's finger and the peripheral trace is smaller, thereby improving the adverse effects of large parasitic capacitance on the yield and touch performance of the touch screen.

[0008] Although existing technologies provide improved methods for reducing parasitic capacitance, they focus on controlling the dielectric constant and the distance between the conductive plates, and rarely involve the conductive plate area. Therefore, the effect of reducing parasitic capacitance is still limited. Therefore, it is necessary to provide a method to reduce the area of ​​the electrode intersection to achieve the goal of further reducing parasitic capacitance. Summary of the Invention

[0009] The main purpose of the present invention is to provide a touch panel capable of reducing parasitic capacitance, and more particularly, to provide a method for effectively reducing parasitic capacitance by reducing the area of ​​electrode intersections, thereby improving touch sensitivity.

[0010] To achieve the above objectives, the present invention provides the following specific technical means: a transparent substrate having a first surface and a second surface opposite to the first surface, having a touch area and a peripheral circuit area, wherein the touch area is located in the middle region of the transparent substrate and surrounded by the peripheral circuit area; a first sensing electrode unit, located above the first surface and the touch area, comprising a plurality of first sensing electrode strips and a first dummy sensing electrode strip, wherein a first uncharged dummy sensing electrode strip is disposed between two adjacent first sensing electrode strips, the first dummy sensing electrode strip is not connected to the two first sensing electrode strips and is spaced apart from the two first sensing electrode strips; and a second sensing electrode unit, located above the second surface and the touch area, comprising a plurality of second sensing electrode strips and a second dummy sensing electrode strip, wherein a second uncharged dummy sensing electrode strip is disposed between two adjacent second sensing electrode strips, the second dummy sensing electrode strip is not connected to the two second sensing electrode strips and is spaced apart from the two second sensing electrode strips.

[0011] The first simulated sensing electrode strips are interlaced with the second sensing electrode strips and the second simulated sensing electrode strips, and the second simulated sensing electrode strips are interlaced with the first sensing electrode strips and the first simulated sensing electrode strips.

[0012] A preferred embodiment of the present invention is that a specific area of ​​the touch zone further includes multiple first simulated sensing electrode strips and multiple second simulated sensing electrode strips, the first sensing electrode strips in the specific area are not connected to each other and are spaced apart, and a first simulated sensing electrode strip is arranged between any two adjacent first sensing electrode strips, and the second sensing electrode strips in the specific area are not connected to each other and are spaced apart, and a second simulated sensing electrode strip is arranged between any two adjacent second sensing electrode strips, the first simulated sensing electrode strips are interlaced with the second sensing electrode strips and the second simulated sensing electrode strips, and the second simulated sensing electrode strips are interlaced with the first sensing electrode strips and the first simulated sensing electrode strips; thereby improving the touch sensitivity of the specific area; the specific area is the entire or partial area of ​​the touch zone.

[0013] A preferred embodiment of the present invention is that the first sensing electrode strip and the second sensing electrode strip are composed of at least a plurality of metal grids, wherein the metal grids include a plurality of nodes, and the angle between any two lines constituting the nodes is within an appropriate angle range and is determined in a random manner within the appropriate angle range. The metal grids are further configured with a cross or a tic-tac-toe pattern, respectively, and the cross or the tic-tac-toe pattern does not intersect the metal grids and does not itself have any nodes, thereby forming a grid density that is invisible to the naked eye.

[0014] Continuing from the above paragraph, any two lines constituting the node are formed by lines with curvature and / or slope, and the appropriate angle range is between 75 and 125 degrees.

[0015] In a preferred embodiment of the present invention, the first simulated sensing electrode strips and the second simulated sensing electrodes are composed of at least a plurality of simulated metal meshes, each of which includes a plurality of nodes. The angle formed between any two lines forming a node in the simulated metal mesh is within an appropriate angle range and is determined randomly within the appropriate angle range. Each of the simulated metal meshes is configured with a cross or a tic-tac-toe pattern, wherein the cross or the tic-tac-toe pattern does not intersect the simulated metal mesh and does not have any nodes. The simulated metal meshes are primarily composed of incomplete simulated metal meshes. The lines forming the simulated metal meshes are primarily composed of curved or sloped lines, and the appropriate angle range is between 75 and 125 degrees, thereby forming a mesh density that is invisible to the naked eye.

[0016] Another main object of the present invention is to provide a touch panel that can reduce parasitic capacitance. In addition to improving touch sensitivity by reducing the area of ​​electrode intersections to effectively reduce parasitic capacitance, different touch sensitivities can be achieved in different areas of the touch area.

[0017] To achieve the other purpose mentioned above, the specific technical means provided by the present invention are as follows: on the basis of the embodiment based on the main purpose, the touch area further includes a middle touch area and an edge touch area, the middle touch area is surrounded by the edge touch area, and the metal grid and the pseudo-metal grid in the middle touch area are each configured with a cross pattern, and the metal grid and the pseudo-metal grid in the edge touch area are each configured with a cross pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic diagram of a touch panel capable of reducing parasitic capacitance according to the present invention.

[0019] Figure 2 Schematic diagram of the light-transmitting substrate of the present invention.

[0020] Figure 3 is a schematic diagram of a first sensing electrode unit.

[0021] Figure 4 for Figure 3 An enlarged schematic diagram of a local area A.

[0022] Figure 5 is a schematic diagram of a second sensing electrode unit.

[0023] Figure 6 for Figure 5 An enlarged schematic diagram of the local area B.

[0024] Figure 7 FIG. 4 is a simple schematic diagram illustrating the relative relationship between the first sensing electrode unit and the second sensing electrode unit.

[0025] Figure 8 FIG. 4 is an enlarged schematic diagram of a local area after the first sensing electrode unit and the second sensing electrode unit are interlaced.

[0026] Figure 9A A schematic diagram of an embodiment of a node and the angle formed between two lines constituting the node.

[0027] Figure 9B FIG2 is a schematic diagram of another embodiment of a node and the angle formed between two lines constituting the node.

[0028] Figure 10 Schematic diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention in more detail with reference to figures and reference numerals, so that those skilled in the art can implement the embodiments accordingly after studying the present description.

[0030] See Figure 1 , Figure 1 This is a schematic diagram of a touch panel capable of reducing parasitic capacitance according to the present invention. Figure 2 , Figure 2 Schematic diagram of the light-transmitting substrate of the present invention. Figure 1 As shown, the touch panel 1 capable of reducing parasitic capacitance of the present invention comprises at least a transparent substrate 10, a first sensing electrode unit 11 and a second sensing electrode unit 12; Figure 2 As shown, the transparent substrate 10 includes a 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 touch area V. The touch area V is the middle area of ​​the transparent substrate 10, and the peripheral circuit area L is the edge area of ​​the transparent substrate 10, that is, the peripheral circuit area L surrounds the touch area V.

[0031] The transparent substrate 10 can be a rigid substrate or a flexible substrate. The rigid substrate can be made of glass, tempered glass, sapphire, ceramic, or other suitable materials. The flexible substrate can be made of a polymer. Examples of the polymer include polyethylene (PE), polypropylene (PP), polystyrene (PS), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), nylon, polycarbonate (PC), polyurethane (PU), polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), polyimide (PI), acrylic resin, or a mixture of polymethyl methacrylate and polycarbonate. The touch panel formed using the flexible substrate can be flexible and thus suitable for coating on a flexible surface or any flexible object requiring touch functionality, such as a flexible substrate formed of other suitable materials for a display panel.

[0032] like Figure 1 As shown, the first sensing electrode unit 11 and the second sensing electrode unit 13 are arranged on the first surface and the second surface of the transparent substrate 10. The first surface and the second surface correspond to each other, such as the corresponding upper surface and lower surface. They can also be arranged on the upper surface or lower surface of different transparent substrates 10 and then bonded together with optical adhesive (not shown in the figure). Therefore, as long as part or all of the first sensing electrode unit 11 and the second sensing electrode unit 12 are in corresponding relative positions, the purpose of the present invention can be achieved by arranging the first sensing electrode unit 11 and the second sensing electrode unit 12 on a single substrate or multiple substrates.

[0033] See Figure 3 , Figure 3 is a schematic diagram of a first sensing electrode unit, see FIG. Figure 4 for Figure 3 The enlarged schematic diagram of the local area A. Please also cooperate with Figure 1 As shown, the first sensing electrode unit 11 is disposed on the first surface of the transparent substrate 10 and is disposed in the touch area V; Figure 3 As shown, the first sensing electrode unit 11 includes a plurality of first sensing electrode strips 111, first simulated sensing electrode strips 113, and a plurality of first metal leads 115. The first sensing electrode strips 111 are located in the touch area V and extend along the first direction Y. The first metal leads 115 are located in the peripheral circuit area L. Only the first sensing electrode strips 111 are electrically connected to the first metal leads 115. The first sensing electrode strips 111 are parallel to each other or do not intersect.

[0034] Please refer to Figure 4 , and cooperate with Figure 3As shown, two adjacent first sensing electrode strips 111 are not connected to each other, that is, there is a gap D1 between the two adjacent first sensing electrode strips 111, and the uncharged first simulated sensing electrode strips 113 are arranged in the gap D1 between the two first sensing electrode strips 111. The first simulated sensing electrode strips 113 and the first sensing electrode strips 111 are not connected to each other and are separated by a gap D2. It should be noted that the first simulated sensing electrode strips 113 are not electrically connected to the first metal leads 115, and the first sensing electrode strips 111 and the first simulated sensing electrode strips 113 are parallel or non-interlaced.

[0035] See Figure 5 , Figure 5 is a schematic diagram of the second sensing electrode unit, see Figure 6 , Figure 6 for Figure 5 An enlarged schematic diagram of the local area B.

[0036] like Figure 5 and Figure 6 As shown, the second sensing electrode unit 12 is disposed on the second surface. The second sensing electrode unit 12 is located in the touch area V and extends along the second direction X. The second sensing electrode unit 12 includes a plurality of second sensing electrode strips 121, second simulated sensing electrode strips 123, and second metal leads 125. Only the second sensing electrode strips 121 are electrically connected to the second metal leads 125. The second sensing electrode strips 121 are not connected to each other and are spaced apart by a gap D3. A second simulated sensing electrode strip 123 is disposed between two adjacent second sensing electrode strips 121. The second simulated sensing electrode strip 123 is not connected to the two second sensing electrode strips 121 and is spaced apart by a gap D4. The second sensing electrode units 12 are parallel or non-intersecting with each other and are also parallel or non-intersecting with the second simulated sensing electrode strips 123.

[0037] Figure 7 is a simple schematic diagram of the relative relationship between the first sensing electrode unit and the second sensing electrode unit, as shown in FIG. Figure 8 As shown, the first simulated sensing electrode strips 113 (indicated by dotted lines) form an interlaced relationship with the second sensing electrode strips 121 and the second simulated sensing electrode strips 123 (indicated by dotted lines), and the second simulated sensing electrode strips 123 form an interlaced relationship with the first sensing electrode strips 111 and the first simulated sensing electrode strips 113.

[0038] Because all interlaced sensing electrode strips in the prior art are charged, any interlaced sensing electrode strips will generate a certain amount of parasitic capacitance. Compared to the prior art, the charged first sensing electrode strips 111 of the present invention are simultaneously interlaced with the charged second sensing electrode strips 121 and the uncharged second simulated sensing electrode strips 123 (indicated by dotted lines). As long as the size and pattern of the uncharged second simulated sensing electrode strips are appropriately determined, the touch effect will not be affected. Because the second simulated sensing electrode strips are uncharged, parasitic capacitance is not easily generated in the interlaced areas between the second simulated sensing electrode strips and the first sensing electrode strips 111. The interlaced area between the first sensing electrode strips 111 and the second sensing electrode strips 121 is effectively reduced, thereby effectively improving touch sensitivity. Similarly, the parasitic capacitance between the second sensing electrode strips 121 and the first sensing electrode strips 111 and the first simulated sensing electrode strips 113 (indicated by dotted lines) can also be reduced.

[0039] That is Figure 7 In the diagram, parasitic capacitance is generated only at the intersection of solid lines, while no parasitic capacitance is generated at the intersection of solid lines and dotted lines.

[0040] Therefore, the first (second) simulated sensing electrode strips may be configured in part or all of the touch area according to actual needs to reduce the parasitic capacitance value of part or all of the area and improve the touch sensitivity.

[0041] In one embodiment of the present invention, Figure 4 、 Figure 6 The first sensing electrode strips 111 and the second sensing electrode strips 121 are primarily composed of a metal mesh having four nodes. A node is formed by two lines with an angle between the two lines. The angle formed between any two lines constituting a node of the metal mesh is within an appropriate angle range and is determined randomly within the appropriate angle range.

[0042] In a preferred embodiment of the present invention, the metal grid is further configured with a cross or tic-tac-toe pattern (not shown), and the cross or tic-tac-toe pattern does not intersect the metal grid and does not have any nodes (intersections). Preferably, any two lines constituting a node are composed of lines with curvature and / or slope, wherein the appropriate angle range is between 75 and 125 degrees.

[0043] By interlacing the first (second) simulated sensing electrode strips between the first (second) sensing electrode strips, the capacitance value can be reduced to increase touch sensitivity, thereby effectively improving electrical properties. In a preferred embodiment of the present invention, the configuration of the first (second) simulated sensing electrode strips is the same as or similar to the first (second) sensing electrode strips adjacent to the first (second) simulated sensing electrode strips, thereby achieving a grid density that is invisible to the naked eye.

[0044] Specifically, the first and second simulated sensing electrode strips are primarily composed of multiple simulated metal meshes. The characteristics of the simulated metal meshes are substantially the same as those of the aforementioned metal meshes, but the simulated metal meshes may be composed of multiple incomplete meshes or entirely of incomplete meshes. The metal meshes of the first and second sensing electrode strips 111 and 121, while including incomplete meshes (at the edges), are primarily composed of complete metal meshes. An incomplete mesh is defined as a mesh having fewer than four nodes. The angle formed between any two lines constituting the nodes of the simulated metal mesh is within an appropriate angle range and is determined randomly within this appropriate angle range. The simulated metal meshes are further configured in a cross or tic-tac-toe pattern (not shown). Preferably, the cross or tic-tac-toe pattern does not intersect the simulated metal mesh and does not have any nodes (intersections).

[0045] See Figure 8 , Figure 8 FIG is an enlarged schematic diagram of a local area after the first sensing electrode unit and the second sensing electrode unit are interlaced. Figure 8 As shown, the metal mesh of the first sensing electrode unit 11 and the metal mesh of the second sensing electrode unit 12 also form a high-density, invisible-to-the-naked-eye staggered pattern through a mutually staggered relative configuration. 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. The irregular radial pattern is irregularly distributed in the staggered pattern. The aforementioned polygons of different shapes are irregularly dispersed in the staggered pattern. In addition, the second simulated sensing electrode strips of the second sensing electrode unit and the first simulated sensing electrode strips of the first sensing electrode unit are staggered to form an irregular radial pattern.

[0046] In one embodiment of the present invention, the angle between any two lines constituting the nodes of the metal grid or the simulated 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 nodes of the metal grid or the simulated 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 optimal angle range is 80 to 120 degrees; for example, in Figure 9A 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 to θ4 can be 70 degrees, 110 degrees, 80 degrees, and 100 degrees respectively, which together form 360 degrees. Or Figure 9B θ1~θ4 are selected as 95 degrees, 85 degrees, 65 degrees, and 115 degrees respectively. The line connecting the 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.

[0047] In addition, although the cross or tic-tac-toe pattern no longer has nodes, the angle between any two adjacent lines that constitute the cross or tic-tac-toe 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 optimal angle range is 80 to 120 degrees.

[0048] See Figure 10 , Figure 10 This is a preferred embodiment of the present invention. Figure 10 The touch area V further includes a middle touch area V1 and an edge touch area V2. The middle touch area V1 is surrounded by the edge touch area V2. The metal meshes and pseudo-metal meshes corresponding to the middle touch area of ​​the first sensing electrode units 11 and the second sensing electrode units 12 are arranged in a cross pattern, while the metal meshes and pseudo-metal meshes corresponding to the edge touch area V2 of the first sensing electrode units and the second sensing electrode units are arranged in a well pattern. Because the edge touch area is subject to greater interference than the middle touch area, the metal meshes arranged in the well pattern in the edge touch area have a lower mesh density (compared to the cross pattern), resulting in higher impedance. Higher impedance means higher touch sensitivity, thereby improving touch sensitivity in the edge touch area.

[0049] The material of the metal grid, the first simulated sensing electrode strip or the second simulated sensing electrode strip is at least one of copper, gold, aluminum, copper, silver, chromium, titanium, molybdenum, neodymium, nickel and alloys thereof;.

[0050] Because the technology in this invention has not been previously published in publications, journals, magazines, media, or exhibitions, it possesses novelty and is capable of overcoming current technological bottlenecks, making it a truly progressive advancement. Furthermore, this invention addresses existing technical issues, improves overall efficiency, and achieves industrial applicability.

[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 description of the accompanying drawings is as follows:

[0053] 1Touch panel that can reduce parasitic capacitance

[0054] 10Transparent substrate

[0055] 11 first sensing electrode unit

[0056] 12 second sensing electrode unit

[0057] 111 first sensing electrode strip

[0058] 113 first imitation sensing electrode strip

[0059] 115 first metal lead

[0060] 121 second sensing electrode strip

[0061] 123 second imitation sensing electrode strip

[0062] 125 second metal lead

[0063] A and B local areas

[0064] D1~D4 interval

[0065] V touch area

[0066] V1 middle touch area

[0067] V2 edge touch area

[0068] L surrounding line area

[0069] X first direction

[0070] Y second direction

Claims

1. A touch panel capable of reducing parasitic capacitance, characterized in that: Include: A transparent substrate having a first surface and a second surface opposite to the first surface, having a touch area and a peripheral circuit area, wherein the touch area is located in the middle area of ​​the transparent substrate and is surrounded by the peripheral circuit area; a first sensing electrode unit, on the first surface and the touch area, comprising a plurality of first sensing electrode strips and a first dummy sensing electrode strip, wherein a non-charged first dummy sensing electrode strip is disposed between two adjacent first sensing electrode strips, the first dummy sensing electrode strip being disconnected from the two first sensing electrode strips and spaced apart from each other; and a second sensing electrode unit, on the second surface and the touch area, comprising a plurality of second sensing electrode strips and a second dummy sensing electrode strip, wherein a non-charged second dummy sensing electrode strip is disposed between two adjacent second sensing electrode strips, and the second dummy sensing electrode strip is not connected to the two second sensing electrode strips and is spaced apart from each other; The first simulated sensing electrode strips are interlaced with the second simulated sensing electrode strips and the second simulated sensing electrode strips, and the second simulated sensing electrode strips are interlaced with the first simulated sensing electrode strips and the first simulated sensing electrode strips; The first sensing electrode strips and the second sensing electrode strips are composed of at least a plurality of metal meshes, and the first simulated sensing electrode strips and the second simulated sensing electrode strips are composed of at least a plurality of simulated metal meshes. The touch area includes a middle touch area and an edge touch area, the middle touch area is surrounded by the edge touch area, a cross pattern is configured within each mesh of the metal mesh and the simulated metal mesh in the middle touch area, and the cross pattern does not intersect with the mesh in which it is located, and a tic-tac-toe pattern is configured within each mesh of the metal mesh and the simulated metal mesh in the edge touch area, and the tic-tac-toe pattern does not intersect with the mesh in which it is located. The mesh density of the edge touch area is lower than the mesh density of the middle touch area.

2. The touch panel capable of reducing parasitic capacitance according to claim 1, wherein: A specific area of ​​the touch zone further includes a plurality of first simulated sensing electrode strips and a plurality of second simulated sensing electrode strips. The first sensing electrode strips in the specific area are not connected to each other and are spaced apart from each other. A first simulated sensing electrode strip is disposed between any two adjacent first sensing electrode strips. The second sensing electrode strips in the specific area are not connected to each other and are spaced apart from each other. A second simulated sensing electrode strip is disposed between any two adjacent second sensing electrode strips. The first simulated sensing electrode strips are interlaced with the second sensing electrode strips and the second simulated sensing electrode strips, and the second simulated sensing electrode strips are interlaced with the first sensing electrode strips and the first simulated sensing electrode strips.

3. The touch panel capable of reducing parasitic capacitance according to claim 1, wherein: The metal grid includes a plurality of nodes, and the angle between any two lines constituting the nodes is within a proper angle range and is determined in a random number manner within the proper angle range.

4. The touch panel capable of reducing parasitic capacitance according to claim 3, wherein: Any two lines constituting the node are formed by lines with curvature and / or slope, and the appropriate angle range is between 75 and 125 degrees.

5. The touch panel capable of reducing parasitic capacitance according to claim 1 or 3, wherein: The simulated metal grid also includes multiple nodes. The angle formed by any two lines constituting the node in the simulated metal grid is within an appropriate angle range and is determined in a random manner within the appropriate angle range. Each of the simulated metal grids is configured with a cross or a tic-tac-toe pattern. The cross or the tic-tac-toe pattern does not intersect with the simulated metal grid and does not itself have any nodes. The simulated metal grid is mainly composed of incomplete simulated metal grids.

6. The touch panel capable of reducing parasitic capacitance according to claim 5, wherein: The lines constituting the simulated metal grid are mainly composed of lines with curvature or slope, and the appropriate angle range is between 75 and 125 degrees.

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