Touch panel and touch module

Abstract

The utility model discloses an embodiment proposes a kind of touch panel and touch module. Among them, the touch panel includes light-transmitting substrate layer, first sensing electrode layer, insulating resist layer, second sensing electrode layer and film layer. Light-transmitting substrate layer includes the first face and the second face of relatively arranged along its thickness direction;The first sensing electrode layer, insulating resist layer, second sensing electrode layer and film layer of the first face and sequentially stacked on the first face, the first sensing electrode layer has first grid pattern, second sensing electrode layer has second grid pattern, each line of first grid pattern and / or each line of second grid pattern does not have any node, and each line of the first grid pattern and each line of the second grid pattern in the thickness direction of light-transmitting substrate are misaligned and set. Therefore, the touch panel of the utility model embodiment reduces the thickness of whole simultaneously, also has the advantages of reducing signal crosstalk and improving sensing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of touch panel technology, specifically to a touch panel and a touch module having the touch panel. Background Technology

[0002] In related technologies, traditional touch panels combining electromagnetic and capacitive technologies offer significant improvements in writing accuracy and human-computer interaction. However, these touch panels increase the number of light-transmitting substrate layers, leading to an overall increase in thickness and reduced resistance to electromagnetic interference. Furthermore, the intersections of lines in the patterns on the multi-layered electrode layers contain nodes, which can cause signal interference and diffraction, severely impacting display quality. Utility Model Content

[0003] In view of this, the present invention aims to provide a touch panel and a touch module to solve the problems of high thickness and poor display quality of existing touch panels.

[0004] This utility model provides a touch panel.

[0005] This utility model provides a touch module.

[0006] The touch panel of this utility model embodiment includes a light-transmitting substrate layer, a first sensing electrode layer, an insulating photoresist layer, a second sensing electrode layer, and a coating layer.

[0007] The light-transmitting substrate layer includes a first surface and a second surface disposed opposite to each other along its thickness direction; a first sensing electrode layer, an insulating photoresist layer, a second sensing electrode layer and a coating layer are sequentially stacked on the first surface, the first sensing electrode layer has a first grid pattern, the second sensing electrode layer has a second grid pattern, each line of the first grid pattern and / or each line of the second grid pattern has no nodes, and each line constituting the first grid pattern and each line constituting the second grid pattern are staggered in the thickness direction of the light-transmitting substrate.

[0008] The touch panel of this embodiment of the invention, by placing both the first sensing electrode layer and the second sensing electrode layer on the same side of the thickness direction of the light-transmitting substrate layer, and separating the first sensing electrode layer and the second sensing electrode layer by an insulating photoresist layer, requires only one light-transmitting substrate layer compared to conventional touch displays, thus saving the thickness space of at least one light-transmitting substrate layer. The touch panel of this embodiment integrates the first sensing electrode layer, the second sensing electrode layer, and the electromagnetic film layer onto a single light-transmitting substrate layer, resulting in a thinner and lighter overall structure.

[0009] Meanwhile, in the touch panel of this embodiment, the second electrode strip has a second grid pattern. The lines of the first grid pattern and / or the lines of the second grid pattern do not have any node structure. Node-free patterns are non-conductive and therefore lack sensing functionality. The node-free design allows the electric field to be distributed more evenly throughout the touch area, avoiding "dead zones" or areas with sluggish response. The node-free design also reduces direct contact between conductive lines in different directions, thereby reducing mutual interference between signals. Therefore, this helps improve the accuracy and response speed of touch sensing.

[0010] Furthermore, the lines forming the first grid pattern and the lines forming the second grid pattern are staggered in the thickness direction of the light-transmitting substrate layer. This reduces interference between the first and second electrode strips due to overlapping or parallel arrangement, reduces mutual influence of electric fields, and thus lowers signal crosstalk. This improves the spatial resolution of the touch panel. Therefore, the staggered pattern lines help improve the accuracy of touch detection.

[0011] Therefore, the touch panel of this utility model embodiment reduces the overall thickness while also reducing signal crosstalk and improving sensing accuracy.

[0012] In one embodiment, the thickness of the insulating photoresist layer is 2μm-8μm.

[0013] In some embodiments, the transmittance of the insulating photoresist layer is greater than 90%.

[0014] In some embodiments, the melting point of the insulating photoresist layer is greater than 200°C.

[0015] In some embodiments, the first sensing electrode layer includes a plurality of first electrode strips and a plurality of first simulated sensing electrode strips, the first electrode strips and the first simulated sensing electrode strips being alternately arranged along a first direction, and the first simulated sensing electrode strips being unconnected to two adjacent first electrode strips and separated by a gap, the first electrode strips having the first grid pattern, and the first simulated sensing electrode strips being uncharged.

[0016] In some embodiments, the second sensing electrode layer includes a plurality of second electrode strips and a plurality of second simulated sensing electrode strips, the second electrode strips and the second simulated sensing electrode strips are alternately arranged along a second direction, and the second simulated sensing electrode strips are not connected to two adjacent second electrode strips and are separated by a gap, each second electrode strip has a second grid pattern, the second simulated sensing electrode strips are not charged, and the first direction and the second direction are perpendicular to each other.

[0017] In some embodiments, the touch panel further includes a first metal pin and a plurality of first metal leads. Each first electrode strip includes a first metal mesh area and a first wiring area. Each first metal mesh area is provided with the first mesh pattern. The first wiring area of ​​each first electrode strip is disposed on the edge of one side in the second direction. The plurality of first metal leads are connected one-to-one to the plurality of first wiring areas. The insulating photoresist layer is provided with a clearance portion in the area of ​​the first wiring area.

[0018] In some embodiments, the touch panel further includes a second pin and a second lead. Each second electrode strip includes a second metal mesh area and a second wiring area. Each second metal mesh area is provided with a second mesh pattern. The second wiring area of ​​each second electrode strip is disposed at the edge on one side of the first direction. Each second lead is connected between the second wiring area and the second pin. The second pin is fixed on the light-transmitting substrate layer or the insulating photoresist layer.

[0019] In some embodiments, the first grid pattern and the second grid pattern are both cross-shaped patterns and / or grid-shaped patterns.

[0020] In some embodiments, each line constituting the first grid pattern forms an angle with each of the first direction and the second direction; each line constituting the second grid pattern forms an angle with each of the first direction and the second direction.

[0021] In some embodiments, the angle between each line constituting the first grid pattern and each line constituting the second grid pattern and the first direction is 25°-75°.

[0022] In some embodiments, the width of each line constituting the first grid pattern is 2μm-7μm.

[0023] In some embodiments, the width of each line constituting the second grid pattern is 2μm-7μm.

[0024] In some embodiments, the first sensing electrode layer includes a first blackening layer and a plurality of first metal layers, wherein the first blackening layer is disposed on the side of the first metal layer away from the light-transmitting substrate layer.

[0025] The second sensing electrode layer includes a second blackening layer and a plurality of second metals, wherein the second blackening layer is disposed on the side of the second metal layer away from the insulating photoresist layer.

[0026] In some embodiments, the touch panel further includes a third metal mesh layer disposed on the second surface.

[0027] In some embodiments, the light-transmitting substrate layer is a PET layer, and the thickness of the light-transmitting substrate layer is 30μm-100μm.

[0028] In some embodiments, the thickness of each of the first sensing electrode layer and the second sensing electrode layer is 400nm-1500nm.

[0029] The touch panel touch module of this utility model embodiment includes the touch panel according to any one of the above descriptions. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the stacked touch panel according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the touch panel according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the structure of the first sensing electrode layer in an embodiment of the present invention.

[0033] Figure 4 yes Figure 3 Enlarged view at point A.

[0034] Figure 5 yes Figure 3 Enlarged view at point B.

[0035] Figure 6 This is a schematic diagram of the structure of the insulating photoresist layer in an embodiment of the present invention.

[0036] Figure 7 This is a schematic diagram of the structure of the second sensing electrode layer in an embodiment of the present invention.

[0037] Figure 8 yes Figure 7 Enlarged view at point C.

[0038] Explanation of reference numerals in the attached figures:

[0039] Touch panel 100;

[0040] Transparent substrate layer 1;

[0041] First sensing electrode layer 2; first electrode strip 21; first metal mesh area 211; first wiring area 212; first mesh pattern 213; first simulated sensing electrode strip 22;

[0042] Insulating photoresist layer 3;

[0043] Second sensing electrode layer 4; Second electrode strip 41; Second metal mesh area 411; Second wiring area 412; Second mesh pattern 413;

[0044] Coating layer 5;

[0045] Electromagnetic film layer 6. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0047] The following is for reference. Figures 1-8 The touch panel 100 and touch module of this utility model are described by way of example.

[0048] The touch panel 100 of this utility model embodiment includes a light-transmitting substrate layer 1, a first sensing electrode layer 2, an insulating photoresist layer 3, a second sensing electrode layer 4, and a coating layer 5.

[0049] The light-transmitting substrate layer 1 includes a first surface and a second surface disposed opposite to each other along its thickness direction; a first sensing electrode layer 2, an insulating photoresist layer 3, a second sensing electrode layer 4, and a coating layer 5 are sequentially stacked on the first surface. The first sensing electrode layer 2 has a first grid pattern 213, and the second sensing electrode layer 4 has a second grid pattern 413. Each line of the first grid pattern 213 and / or each line of the second grid pattern 413 does not have any nodes (i.e., there are no intersections or connection points between the lines of the pattern). The lines constituting the first grid pattern 213 and the lines constituting the second grid pattern 413 are staggered in the thickness direction of the light-transmitting substrate.

[0050] The touch panel 100 of this embodiment of the invention, by disposing the first sensing electrode layer 2 and the second sensing electrode layer 4 on the same side of the thickness direction of the light-transmitting substrate layer 1, and separating the first sensing electrode layer 2 and the second sensing electrode layer 4 by an insulating photoresist layer 3, requires only one light-transmitting substrate layer 1 compared to conventional touch displays, thus saving the thickness space of at least one light-transmitting substrate layer 1. Integrating the first sensing electrode layer 2 and the second sensing electrode layer 4 onto a single light-transmitting substrate layer 1, the touch panel 100 of this embodiment of the invention results in a thinner and lighter overall structure.

[0051] Meanwhile, in this embodiment of the touch panel 100, the second electrode strip 41 has a second grid pattern 413. The lines of the first grid pattern 213 and / or the lines of the second grid pattern 413 do not have any nodes. This node-free design allows the electric field to be distributed more evenly throughout the touch area, avoiding "dead zones" or areas with sluggish response. Therefore, this ensures consistent touch sensitivity at each location. The node-free design reduces direct contact between conductive lines in different directions, thereby reducing crosstalk between signals. This helps improve the accuracy and response speed of touch sensing.

[0052] Furthermore, the lines constituting the first grid pattern 213 and the lines constituting the second grid pattern 413 are staggered in the thickness direction of the light-transmitting substrate layer 1. This reduces interference between the first electrode strip 21 and the second electrode strip 41 due to overlap or parallel arrangement, reduces mutual influence of electric fields, and lowers signal crosstalk. Moreover, the staggered grid pattern effectively increases the number of sensing points without increasing the number of electrodes, thereby improving the spatial resolution of the touch panel. Therefore, the staggered line pattern helps to further improve the accuracy of touch detection.

[0053] Therefore, the touch panel 100 of this utility model embodiment reduces the overall thickness while also reducing signal crosstalk and improving sensing accuracy.

[0054] The thickness of the insulating photoresist layer 3 can be 2μm-8μm.

[0055] The touch panel 100 of this embodiment optimizes manufacturing costs and device performance by limiting the range of the thickness of the insulating photoresist layer 3. On the one hand, it avoids the situation where the insulating photoresist layer 3 is too thin, which may fail to provide sufficient electrical isolation, easily leading to electrical breakdown and subsequently short circuits or other electrical faults. On the other hand, it avoids the situation where the insulating photoresist layer 3 is too thick, resulting in an excessively thick touch panel 100, which would be detrimental to the thin and light design of the display device.

[0056] Optionally, the thickness of the insulating photoresist layer 3 can be 2μm, 3μm, 4μm, 5μm, 6μm, 7μm or 8μm.

[0057] The insulating photoresist layer 3 is a hardened layer of a mixture of ethyl acetate and adhesive.

[0058] The transmittance of insulating photoresist layer 3 is greater than 90%.

[0059] The touch panel 100 of this embodiment of the invention limits the range of light transmittance of the insulating photoresist layer 3. High light transmittance (greater than 90%) means that more light can pass through the insulating photoresist layer 3, thereby reducing the impact on the brightness and color performance of the display screen. This allows users to obtain a clearer, brighter, and more realistic visual experience. At the same time, due to the reduction in light loss, parallax problems caused by light refraction or reflection can be effectively reduced, which helps to reduce parallax. Therefore, setting the light transmittance of the insulating photoresist layer 3 to above 90% helps to further improve the user's visual experience.

[0060] The insulating photoresist layer 3 has a melting point greater than 200°C. This avoids the problem that if the melting point of the insulating photoresist layer 3 is too low, the structure of the insulating photoresist layer 3 might be damaged when the second sensing electrode layer 4 is sputtered onto the transparent photoresist layer, leading to descaling of the insulating photoresist layer 3 and damage to the insulation between the second sensing electrode layer 4 and the first sensing electrode layer 2. The fact that the melting point of the insulating photoresist layer 3 is greater than 200°C allows it to withstand the instantaneous sputtering temperature, which helps improve the overall safety of the touch panel 100.

[0061] like Figure 3 and Figure 5 As shown, the first sensing electrode layer 2 includes a plurality of first electrode strips 21 and a plurality of first simulated sensing electrode strips 22. The first electrode strips 21 and the first simulated sensing electrode strips 22 are alternately arranged along a first direction, and the first simulated sensing electrode strips 22 are not connected to two adjacent first electrode strips 21 and are separated by a gap. The first electrode strips 21 have a first grid pattern 213, and the first simulated sensing electrode strips 22 are not charged.

[0062] The touch panel 100 of this embodiment of the invention, by setting a non-energized simulated sensing electrode strip between two adjacent first electrode strips 21, helps to form a more uniform electric field distribution. Especially on large-size touch panels, this helps to eliminate "dead zones" or sluggish response areas caused by uneven electric fields, ensuring consistent touch sensitivity at each location. The simulated sensing electrode strip can also act as an isolation between adjacent sensing electrodes, reducing electromagnetic interference (crosstalk) between different sensing electrodes, thereby improving signal quality and ensuring more accurate touch detection. In addition, the design of the simulated sensing electrode strip makes the metal mesh appear more uniform and continuous, reducing the "metal mesh" effect or other visual interference that may occur when the user observes it, thus improving the overall display effect.

[0063] The second sensing electrode layer 4 includes multiple second electrode strips 41 and multiple second simulated sensing electrode strips. The second electrode strips 41 and the second simulated sensing electrode strips are alternately arranged along a second direction, and each second simulated sensing electrode strip is not connected to any two adjacent second electrode strips and is separated by a gap. Each second electrode strip 41 has a second grid pattern 413. The second simulated sensing electrode strips are not charged and are arranged perpendicularly to the first and second directions. Specifically, refer to the structure of the first sensing electrode layer 2. Similarly, this has the advantage of improving the overall display effect.

[0064] The first sensing electrode layer 2 includes a first blackening layer and a plurality of first metal layers, wherein the first blackening layer is disposed on the side of the first metal layer away from the light-transmitting substrate layer 1; the second sensing electrode layer 4 includes a second blackening layer and a plurality of second metal layers, wherein the second blackening layer is disposed on the side of the second metal layer away from the insulating photoresist layer 3.

[0065] like Figure 4 and Figure 8 As shown, the first grid pattern 213 and the second grid pattern 413 are both cross-shaped patterns and / or tic-tac-toe patterns. In other words, the first grid pattern 213 and the second grid pattern 413 are both cross-shaped patterns, the first grid pattern 213 and the second grid pattern 413 are tic-tac-toe patterns, and the first grid pattern 213 and the second grid pattern 413 are both cross-shaped and tic-tac-toe patterns. A nodeless pattern, on the other hand, is a pattern formed by discontinuous lines or discontinuous segments of lines, resembling a cross or tic-tac-toe shape. Combined with the above, the nodeless pattern has no nodes and is not connected to the sensing metal grid.

[0066] The touch panel 100 of this embodiment of the invention sets the first grid pattern 213 and the second grid pattern 413 into a cross-shaped pattern and / or a tic-tac-toe pattern. Both the cross-shaped and tic-tac-toe patterns, by forming a regular grid structure, can provide a uniform electric field distribution throughout the entire touch area, thereby ensuring consistent touch sensitivity at each location and helping to reduce electromagnetic interference between adjacent electrodes. This provides users with higher touch accuracy and better anti-interference capabilities.

[0067] Each line forming the first grid pattern 213 has an angle with each of the first and second directions; each line forming the second grid pattern 413 has an angle with each of the first and second directions.

[0068] Because if the lines of the metal mesh are aligned with or parallel to the arrangement of the display pixels, moiré patterns may occur. The touch panel 100 of this embodiment effectively disperses these interference fringes by ensuring that each line forming the first mesh pattern 213 forms an angle with each of the first and second directions, reducing or eliminating visual interference and thus improving the user's visual experience. Furthermore, setting the lines at a certain angle to the length and width of the sensing electrode layer allows for a more even distribution of sensing points on the touch panel surface, avoiding touch blind spots or insensitive responses caused by overly concentrated sensing in certain areas. Therefore, this touch panel 100 has the advantages of reducing visual interference and improving user experience.

[0069] Each line forming the second grid pattern 413 forms an angle with each of the first and second directions. Similarly, this reduces or eliminates visual interference and enhances the user's visual experience.

[0070] Optionally, the angle between each line forming the first grid pattern 213 and each line forming the second grid pattern 413 and the first direction is 25°-75°. This further reduces or eliminates visual interference and enhances the user's visual experience.

[0071] The width of each line that makes up the first grid pattern 213 is 2μm-7μm.

[0072] The touch panel 100 of this embodiment of the present invention limits the width range of each line of the first grid pattern 213 and / or the second grid pattern 413. This avoids the problem of excessively wide lines in the first grid pattern 213, which would lead to excessive light obstruction, resulting in reduced overall screen brightness and deteriorated visual effects. At the same time, wider lines are more likely to interfere with the pixel arrangement of the display screen, causing moiré patterns. Conversely, it avoids the problem of excessively narrow lines in the first grid pattern 213 and / or the second grid pattern 413, which would lead to increased resistance, increased signal transmission loss, and affect touch response speed and stability. Therefore, the touch panel 100 of this embodiment of the present invention has the advantages of improved display effect, high response stability, and high reliability.

[0073] Optionally, the width of each line that makes up the first grid pattern 213 can be 2μm, 3μm, 4μm, 5μm, 6μm or 7μm.

[0074] The width of each line constituting the second grid pattern 413 is 2μm-7μm. Similarly, the touch panel 100 of this embodiment of the present invention has the advantages of improved display effect, high response stability and high reliability.

[0075] Optionally, the width of each line that makes up the second grid pattern 413 can be 2μm, 3μm, 4μm, 5μm, 6μm or 7μm.

[0076] The touch panel 100 of this embodiment further includes first metal pins and multiple first metal leads. Each first electrode strip 21 includes a first metal mesh area 211 and a first wiring area 212. Each first metal mesh area 211 is provided with a first grid pattern 213. The first wiring area 212 of each first electrode strip 21 is located at the edge on one side in a second direction. The multiple first metal leads are connected one-to-one to the multiple first wiring areas 212. The insulating photoresist layer 3 is provided with a clearance portion in the area of ​​the first wiring area 212. That is, the insulating photoresist layer 3 is not coated on the first wiring area 212. Specifically, because the PIN terminal needs to be bonded to the FPC, it is not necessary to coat it with an insulating photoresist layer.

[0077] The touch panel 100 of this utility model embodiment also includes a second pin and a second lead. Each second electrode strip 41 includes a second metal mesh area 411 and a second wiring area 412. Each second metal mesh area 411 is provided with a second grid pattern 413. The second wiring area 412 of each second electrode strip 41 is disposed on the edge of one side in the first direction. Each second lead is connected between the second wiring area 412 and the second pin. The second pin is fixed on the light-transmitting substrate layer 1 or the insulating photoresist layer 3.

[0078] The light-transmitting substrate layer 1 is a PET layer, and the thickness of the light-transmitting substrate layer 1 is 30μm-100μm.

[0079] The touch panel 100 of this embodiment of the invention improves overall light transmittance by reducing the absorption and reflection losses of light as it passes through the substrate through varying the thickness range of the light-transmitting substrate layer 1. This avoids the situation where an excessively thick light-transmitting substrate layer 1 absorbs and reflects more light, leading to a decrease in light transmittance and consequently affecting the brightness and color performance of the display screen. For flexible or foldable devices, a thicker light-transmitting substrate layer 1 makes it difficult to achieve the required bending performance, limiting the design flexibility of the product and making it more prone to breakage or damage during bending.

[0080] On the other hand, it avoids the problem of insufficient structural strength caused by an excessively thin light-transmitting substrate layer 1, as an excessively thin light-transmitting substrate layer 1 is prone to cracking or deformation under external force, reducing the product's durability and reliability. In addition, a thinner conductive layer reduces resistance to external electromagnetic interference, which may lead to an increase in accidental or missed touches.

[0081] Optionally, the thickness of the light-transmitting substrate layer 1 can be 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm or 100μm.

[0082] The touch panel 100 of this embodiment of the present invention further includes a third metal mesh layer 6, which is disposed on the second surface.

[0083] Optionally, the third metal mesh layer 6 can be an electromagnetic touch layer or its electromagnetic shielding layer.

[0084] The thickness of each of the first sensing electrode layer 2 and the second sensing electrode layer 4 is 400nm-1500nm.

[0085] The method for manufacturing the touch panel 100 according to this embodiment of the utility model includes the following steps:

[0086] S1 forms a first coating on the first surface of the light-transmitting substrate layer 1, and presses a film on the first coating. The film and the first coating are cross-linked by exposure to form a laminate.

[0087] S2 The laminate obtained in step S1 is sequentially subjected to lamination, exposure and etching to form the first sensing electrode layer 22.

[0088] S3 forms an insulating photoresist layer 3 after being coated with an insulating photoresist material on the first sensing electrode layer 2 and cured. The insulating photoresist layer 3 has a melting point greater than 200°C.

[0089] S4 forms a second coating on the insulating photoresist layer 3, and then forms a second sensing electrode layer 4 by lamination, exposure, and etching on the second coating.

[0090] S5 coats the surface of the second sensing electrode layer 4 to form a coating layer 5.

[0091] Specifically, the method for manufacturing the touch panel 100 according to this utility model embodiment includes the following steps:

[0092] 1) PET coating: PET roll is used as the light-transmitting substrate layer 1. It is placed in a vacuum coating machine. While the copper target is directly energized in the cavity, argon gas is introduced for protection. Copper is sputtered onto the PET layer to form the first coating layer.

[0093] 2) Pressing: The photoresist film is pressed onto the first copper plating layer by high temperature and high pressure.

[0094] 3) Exposure: By irradiating parallel ultraviolet light, the first grid pattern 213 on the glass photomask is projected onto the first copper plating layer. The photoresist film will undergo a cross-linking reaction under ultraviolet light irradiation, thereby transferring the pattern on the glass photomask onto the lamination film (dry film).

[0095] 4) Etching: First, the dry film that is not exposed to light is dissolved by a weak alkaline solution, so the first copper plating layer will be exposed in the areas that are not exposed to light, while the exposed areas are protected by the dry film. Then, the exposed copper is removed by an acidic etching solution, leaving only the lines protected by the dry film. Finally, the dry film on the protected lines is cleaned away by a strong alkaline solution to form the first sensing electrode layer 2.

[0096] 5) Transparent photoresist coating and curing: The first sensing electrode layer 2 is coated with an insulating photoresist layer 3 to protect the etched lines. After curing, UV light or heating is used to cure and protect the photoresist coated on the lines.

[0097] 6) Photoresist coating and etching: Cu is sputtered onto the hardened photoresist layer (the hardened insulating photoresist layer 3 can withstand the instantaneous sputtering temperature of 200℃-400℃) by vacuum sputtering to form a second coating layer. The second coating layer is then subjected to lamination, exposure and etching in sequence to form the second sensing electrode layer 4.

[0098] 7) Coating: A coating layer 5 is applied to the surface of the second sensing electrode layer 4 to prevent the circuit from being contaminated.

[0099] The touch module of this utility model embodiment includes a touch panel 100 according to any one of the above.

[0100] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0101] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0102] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0103] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0104] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0105] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0106] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A touch panel, characterized in that, include A light-transmitting substrate layer, the light-transmitting substrate layer including a first surface and a second surface disposed opposite to each other along its thickness direction; The first sensing electrode layer, the insulating photoresist layer, the second sensing electrode layer, and the coating layer are sequentially stacked on the first surface. The first sensing electrode layer has a first grid pattern, and the second sensing electrode layer has a second grid pattern. Each line of the first grid pattern and / or each line of the second grid pattern has no nodes. The lines forming the first grid pattern and the lines forming the second grid pattern are staggered in the thickness direction of the light-transmitting substrate.

2. The touch panel according to claim 1, characterized in that, The thickness of the insulating photoresist layer is 2μm-8μm.

3. The touch panel according to claim 1, characterized in that, The light transmittance of the insulating photoresist layer is greater than 90%; And / or, the melting point of the insulating photoresist layer is greater than 200°C.

4. The touch panel according to claim 1, characterized in that, The first sensing electrode layer includes a plurality of first electrode strips and a plurality of first simulated sensing electrode strips. The first electrode strips and the first simulated sensing electrode strips are alternately arranged along a first direction. The first simulated sensing electrode strips are not connected to two adjacent first electrode strips and are separated by a gap. The first electrode strips have the first grid pattern. The first simulated sensing electrode strips are not charged. And / or, the second sensing electrode layer includes a plurality of second electrode strips and a plurality of second simulated sensing electrode strips, the second electrode strips and the second simulated sensing electrode strips are alternately arranged along a second direction, and the second simulated sensing electrode strips are not connected to two adjacent second electrode strips and are separated by a gap, each second electrode strip has a second grid pattern, the second simulated sensing electrode strips are not charged, and the first direction and the second direction are perpendicular to each other.

5. The touch panel according to claim 4, characterized in that, It also includes a first metal pin and a plurality of first metal leads. Each first electrode strip includes a first metal mesh area and a first wiring area. Each first metal mesh area is provided with the first mesh pattern. The first wiring area of ​​each first electrode strip is located at the edge on one side of the second direction. The plurality of first metal leads are connected to the plurality of first wiring areas in a one-to-one correspondence. The insulating photoresist layer is provided with a clearance portion in the area of ​​the first wiring area. And / or, it also includes a second pin and a second lead, each second electrode strip includes a second metal mesh area and a second wiring area, each second metal mesh area is provided with the second mesh pattern, the second wiring area of ​​each second electrode strip is disposed on the edge of one side of the first direction, each second lead is connected between the second wiring area and the second pin, and the second pin is fixed on the light-transmitting substrate layer or the insulating photoresist layer.

6. The touch panel according to claim 4, characterized in that, Both the first grid pattern and the second grid pattern are cross-shaped patterns and / or grid-shaped patterns; And / or, each line constituting the first grid pattern has an angle with each of the first direction and the second direction; each line constituting the second grid pattern has an angle with each of the first direction and the second direction.

7. The touch panel according to claim 5, characterized in that, The angle between each line forming the first grid pattern and each line forming the second grid pattern and the first direction is 25°-75°; And / or, the width of each line constituting the first grid pattern is 2μm-7μm; And / or, the width of each line constituting the second grid pattern is 2μm-7μm.

8. The touch panel according to claim 1, characterized in that, The first sensing electrode layer includes a first blackening layer and a plurality of first metal layers, wherein the first blackening layer is disposed on the side of the first metal layer away from the light-transmitting substrate layer; The second sensing electrode layer includes a second blackening layer and a plurality of second metals, wherein the second blackening layer is disposed on the side of the second metal layer away from the insulating photoresist layer.

9. The touch panel according to claim 1, characterized in that, It also includes a third metal mesh layer disposed on the second surface; And / or, the light-transmitting substrate layer is a PET layer, and the thickness of the light-transmitting substrate layer is 30μm-100μm; And / or, the thickness of each of the first sensing electrode layer and the second sensing electrode layer is 400nm-1500nm.

10. A touch module, characterized in that, Includes a touch panel according to any one of claims 1-9.

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