TWM608486U - Touch module - Google Patents

Abstract

The present disclosure relates to the field of touch technology, and provides a touch module, which includes a substrate, a first bridging layer, a first touch sensing layer, a second bridging layer, and a second touch sensing layer. The first bridging layer extends on the substrate along a first direction. The first touch sensing layer is disposed on the substrate and includes a plurality of first touch sensing electrodes, in which the first bridging layer is connected to the adjacent first touch sensing electrodes. The second bridging layer is disposed on the first bridging layer, between the adjacent first touch sensing electrodes, and connected in parallel with the first bridging layer. The second touch sensing layer is disposed on the substrate, crossing the second bridging layer along the second direction, and is disposed between the adjacent first touch sensing electrodes.

Description

Touch module

The present disclosure relates to the field of touch technology, in particular to a touch module with low lap impedance.

In recent years, with the development of touch technology, transparent conductors can simultaneously allow light to pass through and provide appropriate conductivity, so they are often used in many display or touch-related devices. In general, the transparent conductor can be various metal oxides, such as indium tin oxide (ITO), indium zinc oxide (IZO), cadmium tin oxide (Cadmium Tin Oxide, CTO), or aluminum-doped oxide. Zinc (Aluminum-doped Zinc Oxide, AZO). However, films made of these metal oxides cannot meet the flexibility requirements of display devices. Therefore, a variety of flexible transparent conductors have been developed today, for example, transparent conductors made of materials such as metal nanowires.

However, display or touch devices made of metal nanowires still have many problems to be solved. For example, when metal nanowires are used to make touch electrodes, and the aforementioned various metal oxides are used to make jumpers that connect the touch electrodes, in order to make the contact resistance between the touch electrodes and the jumper electrodes To meet the specification requirements, the contact area between the jumper electrode and the touch electrode is often increased by increasing the volume of the end of the jumper electrode, so as to achieve the effect of reducing the contact impedance. However, this action often causes the overlapped portion of the jumper electrode and the touch electrode to be viewed by the user during the operation of the touch display device, thereby affecting the visual clarity of the touch display device.

In order to overcome the problem that the contact area between the jumper electrode and the touch electrode is too large and the jumper electrode is seen by the user in the visible area of the touch display device, the present disclosure provides a touch control device with a metal jumper electrode. In the module, the metal jumper electrode and the metal oxide jumper electrode are connected in parallel to reduce the contact resistance between the metal oxide jumper electrode and the touch electrode. In this way, the requirement for low contact impedance of the touch module can be achieved under the premise of maintaining or even reducing the contact area between the metal oxide jumper electrode and the touch electrode. In other words, the present disclosure uses the design of the jumper electrode to solve the problem of visibility of the jumper electrode caused by the excessively large contact area between the jumper electrode and the touch electrode.

The technical solution adopted in the present disclosure is: a touch control module, which includes a substrate, a first bridging layer, a first touch sensing layer, a second bridging layer, and a second touch sensing layer. The first bridging layer extends on the substrate along the first direction. The first touch sensing layer is disposed on the substrate and includes a plurality of first touch sensing electrodes, wherein the first bridging layer is connected to adjacent first touch sensing electrodes. The second bridging layer is disposed on the first bridging layer, is located between the adjacent first touch sensing electrodes, and is connected in parallel with the first bridging layer. The second touch sensing layer is disposed on the substrate, straddles the second bridging layer along the second direction, and is disposed between adjacent first touch sensing electrodes.

In some embodiments, the material of the second bridging layer includes copper, aluminum, copper alloy, aluminum alloy, or a combination thereof.

In some embodiments, the impedance value of the second bridging layer is between 0.20 Ω and 0.24 Ω.

In some embodiments, the material of the first bridging layer includes indium tin oxide, indium zinc oxide, cadmium tin oxide, aluminum-doped zinc oxide or a combination thereof, and the material of the first touch sensing layer and the second touch sensing layer Each includes a matrix and a plurality of metal nanostructures distributed in the matrix.

In some embodiments, the vertical projection area of the second bridging layer on the substrate is smaller than the vertical projection area of the first bridging layer on the substrate, and is completely within the vertical projection area of the first bridging layer on the substrate.

In some embodiments, the two ends of the first bridging layer are respectively embedded in adjacent first touch sensing electrodes, and the lateral contact area between each end and each first touch sensing electrode is between 5000 μm ² To 10000 μm ² .

In some embodiments, the first direction and the second direction are perpendicular to each other.

In some embodiments, the touch module further includes an insulating layer extending laterally between the second bridging layer and the second touch sensing layer.

In some embodiments, the insulating layer is embedded between the first touch sensing electrode and the second bridging layer.

In some embodiments, the second touch sensing layer includes a plurality of second touch sensing electrodes and a plurality of connecting electrodes, the connecting electrodes are connected to the second touch sensing electrodes, and the connecting electrodes straddle the second bridging layer.

Hereinafter, a plurality of implementation manners of the present disclosure will be disclosed in diagrams. For the sake of clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this disclosure. That is to say, in some implementations of this disclosure, these practical details are unnecessary, and therefore should not be used to limit this disclosure. In addition, in order to simplify the drawings, some conventionally used structures and elements will be shown in a simple schematic manner in the drawings. In addition, for the convenience of readers, the size of each element in the drawings is not drawn according to the actual scale.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" can be used herein to describe the relationship between one element and another element, as shown in the figure. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one figure is turned over, the components described as being on the "lower" side of the other components will be oriented on the "upper" side of the other components. Therefore, the exemplary term "lower" may include an orientation of "lower" and "upper", depending on the specific orientation of the drawing. Similarly, if the device in one figure is turned over, elements described as "below" other elements will be oriented "above" the other elements. Thus, the exemplary term "below" can include an orientation of above and below.

FIG. 1 is a schematic top view of a touch module 100 according to some embodiments of the present disclosure. FIG. 2 is a partial enlarged perspective view of the region R1 of the touch module 100 in FIG. 1. FIG. Please refer to FIGS. 1 and 2. The touch module 100 of the present disclosure is a single-sided bridge touch module 100. The touch module 100 includes a substrate 110, a first touch sensing layer 120, a second touch sensing layer 130, and a plurality of first bridging layers (also called first bridging electrodes) 140. In some embodiments, the substrate 110 has a visible area DR and a peripheral area PR located around the visible area DR, and the first touch sensing layer 120, the second touch sensing layer 130, and the first jumper electrode 140 are disposed on the substrate 110 In the viewing area DR. The first touch sensing layer 120 is disposed on the substrate 110 and includes a plurality of first touch sensing electrodes 122 arranged along the first direction D1. The first bridging electrode 140 extends on the substrate 110 along the first direction D1, is located between the adjacent first touch sensing electrodes 122, and is connected to the adjacent first touch sensing electrodes 122. In other words, the plurality of first crossover electrodes 140 connect the plurality of first touch sensing electrodes 122 to each other to form an electron transmission path extending along the first direction D1. The second touch sensing layer 130 is disposed on the substrate 110 and is located between the adjacent first touch sensing electrodes 122, and includes a plurality of second touch sensing electrodes 132 arranged along the second direction D2 and a plurality of connections The electrodes 134, in which the second touch sensing electrodes 132 and the connecting electrodes 134 are alternately arranged along the second direction D2, and the connecting electrodes 134 can be connected to adjacent second touch sensing electrodes 132. In other words, the plurality of connection electrodes 134 connect the plurality of second touch sensing electrodes 132 to each other to form an electron transmission path extending along the second direction D2. On the other hand, the connecting electrode 134 of the second touch sensing layer 130 crosses the first bridging electrode 140 from above the first bridging electrode 140 along the second direction D2, thereby forming a contact with a single-sided double-layer electrode structure. Control module 100. The touch module 100 of the present disclosure further includes a second jumper layer (also called a second jumper electrode) 150. The second jumper electrode 150 is disposed on the first jumper electrode 140 and is connected to the first jumper electrode 140. in parallel. The present disclosure reduces the contact impedance between the first touch sensing layer 120 and the first jumper electrode 140 through the arrangement of the second jumper electrode 150, so as to reduce the resistive-capacitive load value of the touch module 100. capacitive loading, RC loading), and reduce the contact area between the first touch sensing layer 120 and the first jumper electrode 140, thereby improving the visibility of the first jumper electrode 140 in the visible area DR. In the following description, a more detailed description will be given.

In some embodiments, the first touch-sensing layer 120 may be arranged along the x-axis, and the second touch-sensing layer 130 may be arranged along the y-axis, that is, the extension direction of the first touch-sensing layer 120 is the same as The extension direction of the second touch sensing layer 130 is perpendicular to each other on the plane formed by the x-axis and the y-axis. In other words, the first touch sensing layer 120 can be used as horizontal touch sensing electrodes, and the second touch sensing layer 130 can be used as vertical touch sensing electrodes. In some embodiments, the connection electrode of the second touch sensing layer 130 crosses the second bridge electrode 150 from above the second bridge electrode 150 along the second direction D2. In some embodiments, the first touch sensing layer 120 and the second touch sensing layer 130 (including the touch sensing electrode 132 and the connecting electrode 134) may each include a matrix and a plurality of metal nanowires distributed in the matrix ( It can also be called metal nanostructure). The matrix may include a polymer or a mixture thereof to impart specific chemical, mechanical, and optical properties to the first touch sensing layer 120 and the second touch sensing layer 130. For example, the matrix can provide good adhesion between the first touch sensing layer 120 and the second touch sensing layer 130 and other layers. For another example, the matrix can also provide good mechanical strength for the first touch sensing layer 120 and the second touch sensing layer 130. In some embodiments, the matrix may include a specific polymer, so that the first touch sensing layer 120 and the second touch sensing layer 130 have additional surface protection against scratches/abrasion, thereby improving the first touch sensing The surface strength of the layer 120 and the second touch sensing layer 130. The above-mentioned specific polymer can be polyacrylate, epoxy resin, polysiloxane, polysiloxane, polyurethane, poly(silicon-acrylic acid) or a combination thereof. In some embodiments, the matrix may also include a cross-linking agent, a surfactant, a stabilizer (for example, including but not limited to an antioxidant or an ultraviolet light stabilizer), a polymerization inhibitor, or a combination of any of the above, so as to improve the first touch The sensing layer 120 and the second touch sensing layer 130 have anti-ultraviolet properties and prolong their service life.

In some embodiments, metal nanowires may include, but are not limited to, silver nanowires, gold nanowires, copper nanowires, nickel nanowires, etc. ) Or a combination thereof. In more detail, the "metal nanowire" in this document is a collective noun, which refers to a collection of metal wires that include multiple metal elements, metal alloys, or metal compounds (including metal oxides). In addition, the number of metal nanowires included in each of the first touch sensing layer 120 and the second touch sensing layer 130 does not limit the disclosure. The metal nanowire disclosed in the present disclosure has excellent light transmittance. Therefore, when the touch module 100 is configured as a touch display module, the metal nanowire can not affect the optical properties of the touch display module 100. Under the premise of providing good conductivity of the first touch sensing layer 120 and the second touch sensing layer 130.

In some embodiments, the cross-sectional size (diameter of the cross-section) of a single metal nanowire can be less than 500 nm, preferably less than 100 nm, and more preferably less than 50 nm, so that the first touch sensing layer 120 and the second The second touch sensing layer 130 has a relatively low haze (also known as haze). In detail, when the cross-sectional size of a single metal nanowire is greater than 500 nm, the single metal nanowire will be too thick, resulting in excessively high haze in the first touch sensing layer 120 and the second touch sensing layer 130. Thus, the visual clarity of the visible area DR of the display module 100 is affected. In some embodiments, the aspect ratio of a single metal nanowire can be between 10 and 100,000, so that the first touch sensing layer 120 and the second touch sensing layer 130 can have lower resistivity and higher Light transmittance and low haze. In detail, when the aspect ratio of a single metal nanowire is less than 10, the conductive network may not be formed well, resulting in the first touch sensing layer 120 and the second touch sensing layer 130 having too high resistivity. Therefore, the metal nanowires must be distributed in the matrix with a larger arrangement density (that is, the number of metal nanowires included in each unit volume of the first touch sensing layer 120 and the second touch sensing layer 130). The conductivity of the first touch-sensing layer 120 and the second touch-sensing layer 130 can be improved, thereby causing the light transmittance of the first touch-sensing layer 120 and the second touch-sensing layer 130 to be too low and the fog to be too high. It should be understood that other terms such as silk, fiber, or tube can also have the above-mentioned cross-sectional dimensions and aspect ratios, and are also covered by this disclosure.

FIG. 3 is a schematic cross-sectional view of the touch module 100 in FIG. 2 taken along the line a-a. Please refer to FIGS. 2 and 3 at the same time. The first jumper electrode 140 extends on the substrate 110 along the first direction D1 and is connected to the adjacent first touch sensing electrode 122. In detail, the first jumper electrode 140 has two ends 142 and a middle section 144 sandwiched between the two ends 142 in the first direction D1, and the two ends 142 of the first jumper electrode 140 are respectively embedded in the phase Adjacent to the first touch sensing electrode 122. In some embodiments, the two ends 142 of the first bridging electrode 140 are respectively sandwiched between the substrate 110 and the first touch sensing electrode 122 in the extending direction perpendicular to the substrate 110, and contact the substrate 110 and the first touch sensing electrode 122.控sensing electrodes 122. In some embodiments, the middle section 144 of the first jumper electrode 140 may also be partially sandwiched between the substrate 110 and the first touch sensing electrode 122 and contact the substrate 110 and the first touch sensing electrode 122. In some embodiments, when viewed from the upper view angle (ie, the viewing angle of FIG. 2), the first jumper electrode 140 may be, for example, dumbbell-shaped, that is, the two ends 142 of the first jumper electrode 140 are along the first The width W1 of the two directions D2 is greater than the width W2 of the middle section 144 along the second direction D2, so that there is a certain contact area between the first jumper electrode 140 and the first touch sensing electrode 122, thereby reducing the first jumper electrode 140 The contact impedance with the first touch sensing electrode 122. In some embodiments, the material of the first jumper electrode 140 may include indium tin oxide, indium zinc oxide, cadmium tin oxide, aluminum-doped zinc oxide, or a combination thereof. Since the above materials all have excellent light transmittance, when the touch module 100 is configured as a touch display module, the above materials will not affect the optical properties of the touch display module 100 (for example, optical transmittance) And clarity). On the other hand, since the above-mentioned materials are metal oxide materials with low reactivity, they will not undergo spontaneous electrochemical reactions (such as ion redox reactions) with the metal nanowires in the first touch sensing electrode 122. Thereby, the surface of the first jumper electrode 140 is prevented from being oxidized, and the contact stability between the first touch sensing electrode 122 and the first jumper electrode 140 is improved.

In some embodiments, the second jumper electrode 150 is superposed on the first jumper electrode 140, extends along the first direction D1, and is located between the adjacent first touch sensing electrodes 122 so as to be in contact with the first The jumper electrodes 140 are connected in parallel. In some embodiments, the material of the second jumper electrode 150 may include copper, aluminum, copper alloy, aluminum alloy, or a combination thereof. Through the selection of the above-mentioned materials, the second jumper electrode 150 can have a smaller impedance. Therefore, when the second jumper electrode 150 and the first jumper electrode 140 are connected in parallel, the two can jointly form a jumper electrode 160 with lower impedance, that is, a jumper electrode with lower impedance 160 can be connected to adjacent first touch sensing electrodes 122. Since the jumper electrode 160 with lower impedance is connected to the adjacent first touch sensing electrode 122, the contact impedance between the first jumper electrode 140 and the first touch sensing electrode 122 in the jumper electrode 160 can be reduced. Thereby, the resistance-capacitive load value of the touch module 100 is reduced and the reliability of the product is improved. On the other hand, since the first jumper electrode 140 in the jumper electrode 160 and the first touch sensing electrode 122 have a relatively low contact impedance, it is not necessary to add the first jumper electrode 140 and the first touch sensing electrode 122. The contact area between the sensing electrodes 122 is controlled to achieve the effect of reducing the contact impedance. That is, the contact area between the first crossover electrode 140 and the first touch sensing electrode 122 can be further reduced to ensure the first crossover. The overlapping part of the connecting electrode 140 and the first touch sensing electrode 122 cannot be seen by the user (that is, ensuring that the overlapping part is maintained in an invisible state). In some embodiments, the lateral contact area between the end 142 of the first jumper electrode 140 and the first touch sensing electrode 122 (for example, the contact area between the upper surface 141 of the first jumper electrode 140 and the first touch sensing electrode 122 The area) can be between 5000 μm ² and 10000 μm ² . In detail, if the lateral contact area is less than 5000 μm ² , the contact impedance between the first jumper electrode 140 and the first touch sensing electrode 122 may be too large, thereby affecting the resistance-capacitance load value of the touch module 100; If the lateral contact area is greater than 10000 μm ² , the overlapping portion of the first jumper electrode 140 and the first touch sensing electrode 122 may be viewed by the user, which may affect the viewing area DR of the touch module 100 Visual clarity.

In some embodiments, the impedance value of the second jumper electrode 150 may be between 0.20 Ω and 0.24 Ω, so as to effectively reduce the contact impedance between the jumper electrode 160 and the first touch sensing electrode 122. In more detail, if the impedance value of the second jumper electrode 150 is greater than 0.24 Ω, the impedance value of the jumper electrode 160 may not be controlled in a small range, so that the jumper electrode 160 and the first jumper cannot be effectively reduced. A contact impedance between touch sensing electrodes 122. Specifically, please refer to FIG. 4, which is a schematic diagram of the circuit layout of the touch module 100 in FIG. 2. In Figure 4, the impedance value R1 refers to the impedance of the second touch sensing layer 130 in the upper part of Figure 2, and the resistance value R2 refers to the first touch sensing electrode 122 and the first touch sensing electrode 122 on the left in Figure 2 The contact impedance of the jumper electrode 140, the impedance value R3 refers to the impedance of the first jumper electrode 140 in Figure 2, and the impedance value R4 refers to the first touch sensing electrode 122 on the right side of the figure 2 and the first span For the contact impedance of the connecting electrode 140, the impedance value R5 refers to the impedance of the second touch sensing layer 130 at the bottom in the second figure, and the impedance value R6 refers to the impedance of the second jumper electrode 150 in the second figure. As shown in Figure 4, when the second jumper electrode 150 and the first jumper electrode 140 are arranged in parallel, the impedance of the jumper electrode 160 formed by the second jumper electrode 150 and the first jumper electrode 140 Can be reduced. For example, when the first jumper electrode 140 with an impedance value R3 of 20 Ω and the second jumper electrode 150 with an impedance value of R6 of 0.22 Ω are arranged in parallel, the jumper electrode 160 with an impedance value of about 0.217 Ω can be formed. Therefore, the contact impedance between the first jumper electrode 140 and the first touch sensing electrode 122 in the jumper electrode 160 is reduced, so as to reduce the RC load value of the touch module 100 and improve the reliability of the product. In this way, the contact area between the first jumper electrode 140 and the first touch sensing electrode 122 can be further reduced to ensure that the overlapping portion of the first jumper electrode 140 and the first touch sensing electrode 122 cannot be used by the user. Watch it.

Please go back to FIGS. 2 and 3. In some embodiments, the vertical projection area of the second jumper electrode 150 on the substrate 110 is smaller than the vertical projection area of the first jumper electrode 140 on the substrate 110, and the second jumper The vertical projection area of the electrode 150 on the substrate 110 is completely within the vertical projection area of the first jumper electrode 140 on the substrate 110. Furthermore, the vertical projection area of the second jumper electrode 150 on the substrate 110 is smaller than the vertical projection area of the middle section 144 of the first jumper electrode 140 on the substrate 110, and is completely located in the middle of the first jumper electrode 140 The section 144 is in the vertical projection area of the substrate 110. In other words, the width W2 of the middle section 144 of the first bridging electrode 140 in the second direction D2 is greater than the width W3 of the second bridging electrode 150 in the second direction D2, and the middle section of the first bridging electrode 140 The length L1 of the 144 along the first direction D1 is greater than the length L2 of the second bridging electrode 150 along the first direction D1. In this way, it can be ensured that the second jumper electrode 150 is stably formed on the first jumper electrode 140, and the area of the second jumper electrode 150 can be prevented from causing the first jumper electrode 140 and the second jumper electrode to be too large. The overlapped part of 150 is seen by the user, which affects the visual clarity of the visible area DR of the touch module 100.

In some embodiments, the touch module 100 further includes an insulating layer 170 that extends laterally between the second jumper electrode 150 and the second touch sensing layer 130. The insulating layer 170 can separate the second jumper electrode 150 and the second touch sensing layer 130 from each other to prevent the second jumper electrode 150 and the second touch sensing layer 130 from contacting each other, thereby ensuring the second touch sensing layer The electrical insulation between 130 and the first touch sensing layer 120 is maintained. On the other hand, the arrangement of the insulating layer 170 can also prevent spontaneous electrochemical reaction between the metal material in the second jumper electrode 150 and the metal nanowire in the second touch sensing layer 130, so as to prevent the second jumper. The surface of the electrode 150 is oxidized, thereby improving the reliability of the product. In some embodiments, the insulating layer 170 may be further embedded between the first touch sensing electrode 122 and the second jumper electrode 150 to separate the first touch sensing electrode 122 and the second jumper electrode 150 from each other Therefore, the first touch sensing electrode 122 and the second jumper electrode 150 are prevented from contacting each other. In this way, it is possible to avoid spontaneous electrochemical reaction between the metal material in the second jumper electrode 150 and the metal nanowire in the first touch sensing layer 120, so as to prevent the surface of the second jumper electrode 150 from being oxidized, thereby Improve product reliability. In some embodiments, the material of the insulating layer 170 may be an insulating (non-conductive) resin or other organic materials. For example, the insulating layer 170 may include polyethylene, polypropylene, polyvinyl butyral, polycarbonate, acrylonitrile-butadiene-styrene copolymer, poly(3,4-ethylenedioxythiophene). ), poly(styrene sulfonic acid), ceramic or any combination of the above. In some embodiments, the insulating layer 170 includes, but is not limited to, any of the following polymers: polyacrylic resin (e.g., polymethacrylate, polyacrylate, and polyacrylonitrile); polyvinyl alcohol; polyester (e.g., poly Ethylene terephthalate, polyester naphthalate and polycarbonate); polymers with high aromaticity (for example, phenolic resin or cresol-formaldehyde, polystyrene, polyimide, polyethylene Methyl toluene, polyvinyl xylene, polymethylene, polysulfide, polyamide, polyimide, polyetherimide, polyphenylene and polyphenyl ether); polyurethane ; Epoxy resin; polyolefin (for example, polypropylene, polymethylpentene and cycloolefin); polysiloxane and other silicon-containing polymers (for example, polysilsesquioxane and polysiloxane); synthetic rubber (for example, EPDM, EPDM, and styrene-butadiene rubber; fluoropolymers (for example, polyvinylidene fluoride, polytetrafluoroethylene, and polyhexafluoropropylene); cellulose; polyvinyl chloride; polyacetate; poly Norbornene; and a copolymer of fluoro-olefin and hydrocarbon olefin. With the above-mentioned insulating resin or other organic materials, the second jumper electrode 150 can be electrically insulated from the second touch sensing layer through the insulating layer 170 , And the second jumper electrode 150 can be separated from the first touch sensing layer 120 through the insulating layer 170.

To sum up, because the touch module of the present disclosure has the second jumper electrode 150 made of metal material, and the second jumper electrode 150 and the first jumper electrode made of metal oxide material 140 is connected in parallel, so the contact impedance between the first touch sensing layer 120 and the first jumper electrode 140 can be reduced, so as to reduce the resistance-capacitive load value of the touch module 100, and make the first touch sensing layer 120 and The contact area between the first bridging electrodes 140 is reduced, thereby improving the visibility of the first bridging electrodes 140 in the visible area DR. Although this disclosure has been disclosed in the above manner, it is not intended to limit this disclosure. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, this disclosure is protected The scope shall be subject to the definition of the attached patent application scope.

100: Touch module 110: substrate 120: The first touch sensing layer 122: The first touch sensing electrode 130: second touch sensing layer 132: second touch sensing electrode 134: Connect electrode 140: The first bridging layer 141: upper surface 142: End 144: Middle section 150: second bridging layer 160: jumper electrode 170: insulating layer W1-W3: width L1-L2: length D1: First direction D2: second direction DR: Viewing area PR: Peripheral area R1: area a-a: line segment

In order to make the above and other objectives, features, advantages and embodiments of the present disclosure more obvious and understandable, the description of the accompanying drawings is as follows: Figure 1 is a schematic top view of a touch module according to some embodiments of the present disclosure; Figure 2 is a partial enlarged perspective view of the area R1 of the touch module in Figure 1; Fig. 3 is a schematic cross-sectional view taken along the line a-a of the touch module in Fig. 2; and FIG. 4 is a schematic diagram of the circuit layout of the touch module shown in FIG. 2. FIG.

110: substrate

120: The first touch sensing layer

122: The first touch sensing electrode

130: second touch sensing layer

132: second touch sensing electrode

134: Connect electrode

140: The first bridging layer

142: End

144: Middle section

150: second bridging layer

160: jumper electrode

170: insulating layer

W1-W3: width

D1: First direction

D2: second direction

R1: area

a-a: line segment

Claims (10)

A touch control module includes: A substrate; A first bridging layer extending on the substrate along a first direction; A first touch sensing layer disposed on the substrate and including a plurality of first touch sensing electrodes, wherein the first bridging layer connects the adjacent first touch sensing electrodes; A second bridging layer disposed on the first bridging layer, located between the adjacent first touch sensing electrodes, and connected in parallel with the first bridging layer; and A second touch sensing layer is disposed on the substrate, straddles the second bridging layer along a second direction, and is disposed between the adjacent first touch sensing electrodes. The touch module according to claim 1, wherein the material of the second bridging layer includes copper, aluminum, copper alloy, aluminum alloy, or a combination thereof. The touch module according to claim 1, wherein the impedance value of the second bridge layer is between 0.20 Ω and 0.24 Ω. The touch module according to claim 1, wherein the material of the first bridging layer includes indium tin oxide, indium zinc oxide, cadmium tin oxide, aluminum-doped zinc oxide, or a combination thereof, and the first touch sensor The materials of the layer and the second touch sensing layer each include a matrix and a plurality of metal nanostructures distributed in the matrix. The touch module according to claim 1, wherein the vertical projection area of the second bridging layer on the substrate is smaller than the vertical projected area of the first bridging layer on the substrate, and is completely located on the substrate. The first bridging layer is in the vertical projection area of the substrate. The touch module according to claim 1, wherein two ends of the first bridging layer are respectively embedded in the adjacent first touch sensing electrodes, and each of the ends and each of the The lateral contact area of the first touch sensing electrode is between 5000 μm ² and 10000 μm ² . The touch module according to claim 1, wherein the first direction and the second direction are perpendicular to each other. The touch module according to claim 1, further comprising an insulating layer extending laterally between the second bridging layer and the second touch sensing layer. The touch module according to claim 8, wherein the insulating layer is embedded between the first touch sensing electrode and the second bridging layer. The touch module according to claim 1, wherein the second touch sensing layer includes a plurality of second touch sensing electrodes and a plurality of connecting electrodes, and the connecting electrodes are connected to the second touch sensing electrodes, And the connecting electrode straddles the second bridging layer.

Images