Touch panels and touch display devices

Abstract

This application discloses a touch panel and a touch display device. The touch panel includes: a plurality of touch electrodes and a plurality of traces; wherein, each touch electrode includes a main body portion; the plurality of traces are located around the plurality of touch electrodes, and at least some of the traces include a first bridging portion; at least some of the touch electrodes also include an extension portion connected to the main body portion; the first bridging portion and the corresponding extension portion are stacked and insulated along the thickness direction of the touch panel; and / or, at least some of the traces also include a virtual portion, the first bridging portion and the corresponding virtual portion are located on different traces, and are stacked and insulated along the thickness direction of the touch panel. Through the above design, this application can reduce the probability of the touch panel being damaged by electrostatic discharge.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to a touch panel and a touch display device. Background Technology

[0002] Touch panels are crucial components in display devices such as mobile phones and tablets. During the manufacturing or use of touch panels, static electricity can cause discharges between different materials, damaging the touch panel and affecting its touch yield. Summary of the Invention

[0003] This application provides a touch panel and a touch display device to reduce the probability of the touch panel being damaged by electrostatic discharge.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a touch panel, comprising:

[0005] Multiple touch electrodes, each touch electrode comprising a main body;

[0006] Multiple traces are located around multiple touch electrodes, and at least some of the traces include a first bridge portion. At least some of the touch electrodes also include an extension portion connected to the main body portion. The first bridge portion and the corresponding extension portion are stacked and insulated along the thickness direction of the touch panel. And / or, at least some of the traces also include a virtual portion. The first bridge portion and the corresponding virtual portion are located on different traces and are stacked and insulated along the thickness direction of the touch panel.

[0007] Optionally, the plurality of touch electrodes includes at least two first touch electrodes, the main body portions of the at least two first touch electrodes extending along a first direction and arranged along a second direction; the main body portion of the first touch electrode includes two first ends disposed opposite to each other along the first direction; at least one of the two sides disposed opposite to each other along the second direction is provided with an extension portion;

[0008] Optionally, the number of extensions between the two first ends on the same side of two adjacent first touch electrodes is one;

[0009] Optionally, each first end of the first touch electrode is provided with an extension;

[0010] Optionally, the two extensions of the first touch electrode are located on opposite sides of its main body along the second direction.

[0011] Optionally, the plurality of touch electrodes further includes at least two second touch electrodes, which extend along a second direction and are arranged along a first direction;

[0012] The first touch electrode and the second touch electrode are provided with cross insulation; the discharge initiation voltage of the first bridging portion and the corresponding extension portion and / or virtual portion is less than the discharge initiation voltage at the intersection of the first touch electrode and the second touch electrode;

[0013] Optionally, the main body of the second touch electrode includes a second bridging portion located at the intersection of the first touch electrode and the second touch electrode;

[0014] Optionally, the dimension of the first bridge portion corresponding to the extension in the second direction is smaller than the dimension of the second bridge portion in the first direction;

[0015] Optionally, the dimension of the extension in the first direction is larger than the dimension of the corresponding first bridging portion in the second direction;

[0016] Optionally, the dimension of the extension in the first direction is smaller than the minimum dimension of the portion at the intersection of the main body of the first touch electrode and the second bridging portion in the second direction.

[0017] Optionally, the dimension of the second bridge portion along the first direction is smaller than the minimum dimension of the portion at the intersection of the main body portion of the first touch electrode and the second bridge portion along the second direction.

[0018] Optionally, the impedance of the first bridge section is greater than or equal to the impedance of the second bridge section; the impedance of the extension section is greater than or equal to the impedance of the second bridge section.

[0019] Optionally, the impedance of the wiring where the first bridge section is located is less than or equal to the impedance of the second touch electrode where the second bridge section is located;

[0020] Optionally, the first bridge section and the second bridge section are installed on the same layer and made of the same material;

[0021] Optionally, the first touch electrode and the second touch electrode are one of the touch driving electrode and the touch sensing electrode, respectively.

[0022] Optionally, the second touch electrode further includes a plurality of second touch electrode blocks, the second touch electrode blocks and the second bridging portion being alternately arranged and sequentially connected along the second direction; the first touch electrode and the second touch electrode blocks are disposed in the same layer and are made of the same material;

[0023] Optionally, the first touch electrode is made of a light-transmitting and conductive material, and the first bridging portion is made of a metal material.

[0024] Optionally, the multiple traces include multiple first-type traces, each first-type trace comprising a first connecting portion and a first extension portion that are interconnected.

[0025] The first connecting portion is electrically connected to the first end of the corresponding first touch electrode; at least a portion of the first type of trace has a first bridging portion that intersects and connects with the first extension portion.

[0026] In the same type of trace, the first touch electrode where the extension corresponding to the first bridge portion is located is different from the first touch electrode corresponding to the first connection portion;

[0027] Optionally, in the same first type of trace, the first touch electrode where the extension of the first bridge portion is located and the first touch electrode where the first connection portion is located are arranged adjacent to each other.

[0028] Optionally, multiple first bridge sections correspond to one extension section; and / or, multiple first bridge sections correspond to one virtual section;

[0029] Optionally, multiple first bridge sections corresponding to the same extension are arranged along the second direction.

[0030] Optionally, the multiple traces include multiple second-type traces, each second-type trace having a first bridging portion and / or a virtual portion, at least a portion of the first bridging portion and the corresponding virtual portion being located on different second-type traces and being stacked and insulated along the thickness direction of the touch panel; and / or, at least a portion of the first bridging portion of the second-type trace and the corresponding extension portion being stacked and insulated along the thickness direction of the touch panel.

[0031] Optionally, the second type of wiring includes at least one of grounding wire, shielding wire, and electrically floating wire.

[0032] Optionally, the conductivity of the material of the first bridging portion is greater than the conductivity of the material of the extension portion and / or the virtual portion;

[0033] Optionally, at least a portion of the voltage value on the first bridge section is different from the voltage value on the touch electrode where the corresponding extension is located;

[0034] Optionally, the first touch electrode is disposed in the same layer as the virtual part and is made of the same material.

[0035] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a touch display device, including the touch panel described in any of the above embodiments.

[0036] Unlike existing technologies, the touch panel provided in this application includes multiple touch electrodes and multiple traces located around the multiple touch electrodes. At least some of the traces include a first bridging portion, and at least some touch electrodes include interconnected main bodies and extensions. The first bridging portion and the corresponding extension are stacked and insulated along the thickness direction of the touch panel. And / or, at least some traces also include virtual portions, with the first bridging portion and the corresponding virtual portion located on different traces and stacked and insulated along the thickness direction. The beneficial effect of this application is that a coupled discharge is formed between the first bridging portion and the corresponding extension and / or virtual portion. The discharge initiation voltage of the coupled discharge is relatively small, effectively reducing the amount of static electricity entering the touch electrodes and thus reducing the probability of electrostatic discharge breakdown of the touch electrodes. Furthermore, since the first bridging portion is located around the multiple touch electrodes, when the first bridging portion experiences electrostatic discharge breakdown, it will not affect the touch electrodes, thereby ensuring that the touch function of the touch panel can be normally implemented and guaranteeing touch yield. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0038] Figure 1 This is a top view of one embodiment of the touch panel of this application.

[0039] Figure 2 This is a top view of another embodiment of the touch panel of this application;

[0040] Figure 3 for Figure 1 or Figure 2 A top view schematic diagram of another embodiment of the second bridge section. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] Please see Figure 1 , Figure 1 This is a top view of one embodiment of the touch panel of this application. The touch panel 1 includes a plurality of touch electrodes 10 and a plurality of traces 12.

[0043] Specifically, the plurality of touch electrodes 10 include at least two first touch electrodes 100 and at least two second touch electrodes 102; the first touch electrodes 100 and the second touch electrodes 102 are respectively one of a touch driving electrode and the other of a touch sensing electrode. At least two first touch electrodes 100 are arranged side-by-side along a second direction Y, and at least two second touch electrodes 102 are arranged side-by-side along a first direction X, with the first direction X and the second direction Y intersecting. Optionally, the first direction X and the second direction Y are perpendicular to each other. In this embodiment, the first direction X can be a row direction, and the second direction Y can be a column direction. Of course, in other embodiments, the first direction X can be a column direction, and the second direction Y can be a row direction. The touch electrode 10 includes a main body portion 106; optionally, each first touch electrode 100 and each second touch electrode 102 includes a main body portion 106.

[0044] Multiple traces 12 are located around multiple touch electrodes 10, and at least some of the traces 12 include a first bridging portion 124. At least some of the touch electrodes 10 (e.g., a first touch electrode 100 and / or a second touch electrode 102) also include an extension portion 108 connected to the main body portion 106. The first bridging portion 124 and the corresponding extension portion 108 are stacked and insulated along the thickness direction of the touch panel 1 (not shown, i.e., perpendicular to the paper surface) to form an electrostatic discharge structure. In this embodiment, the main body portion 106 can be considered as part of the touch electrode 10 in the prior art, and the extension portion 108 can be considered as an additional extension introduced on the touch electrode 10 in the prior art. The first bridging portion 124 can be equivalent to a tiny branch provided on the main body of the trace 12. And / or, at least some of the traces 12 also include a virtual portion 128. The first bridging portion 124 and the corresponding virtual portion 128 are located on different traces 12 and are stacked and insulated along the thickness direction of the touch panel 1 to form an electrostatic discharge structure. It should be noted that, Figure 1 Although the first bridging portion 124 covers the extension portion 108 and / or the virtual portion 128, it is in the thickness direction (i.e., the direction perpendicular to the paper). Figure 1 An insulating layer is provided between the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128.

[0045] In the above design, a coupling discharge is formed between the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128. The discharge initiation voltage of the coupling discharge is relatively small, much smaller than the discharge initiation voltage corresponding to the tip discharge mode in related technologies where discharge tips are respectively set on the ends of the traces and touch electrodes located on the same layer. This effectively reduces the amount of static electricity entering the touch electrode 10, thereby reducing the probability of the touch electrode 10 being electrostatically broken down. Furthermore, since the first bridging portion 124 is located on the periphery of the multiple touch electrodes 10, when the first bridging portion 124 experiences electrostatic breakdown, it will not affect the touch electrodes 10, thus ensuring that the touch function of the touch panel 1 can be normally realized and ensuring the touch yield.

[0046] In one implementation, such as Figure 1 As shown, the plurality of touch electrodes 10 include at least two first touch electrodes 100, the main body portion 106 of the at least two first touch electrodes 100 extends along a first direction X and is arranged along a second direction Y; the main body portion 106 of the first touch electrode 100 includes two first end portions 1060 disposed opposite to each other along the first direction X; at least a portion of the first end portion 1060 is provided with an extension portion 108.

[0047] Optionally, at least one of the two sides of the first end portion 1060 disposed opposite each other along the second direction Y is provided with an extension portion 108. Compared with the method of providing the extension portion 108 on the side of the first end portion 1060 away from the other first end portion along the first direction X, this design allows the introduction of the extension portion 108 to not increase the length of the corresponding first touch electrode 100 in the first direction X, thereby helping to reduce the bezel width of the touch panel.

[0048] Optionally, the number of extensions 108 between the two first ends 1060 on the same side of two adjacent first touch electrodes 100 is one; this design ensures that the introduction of the extension 108 will not result in a large gap between two adjacent first touch electrodes 100 arranged along the second direction Y, so as to ensure touch accuracy.

[0049] Alternatively, such as Figure 1 As shown, each first end 1060 of the first touch electrode 100 is provided with at least one extension 108. This design can improve electrostatic discharge efficiency and reduce the probability of the touch electrode 10 being electrostatically broken down.

[0050] Another option, such as Figure 1 As shown, the two extensions 108 of the first touch electrode 100 are respectively located on both sides of its main body 106, which are disposed opposite to each other along the second direction Y. For example, Figure 1In the first touch electrode 100, the left extension 108 is located on the upper side of its main body 106, while the right extension 108 is located on the lower side of the main body 106. The two extensions 108 are located diagonally opposite each other on the main body 106, which improves the electrostatic discharge effect and prevents electrostatic accumulation on one side of the first touch electrode 100 along the second direction Y. This design reduces the difficulty of fabrication and facilitates wiring.

[0051] Alternatively, the extensions 108 of the plurality of first touch electrodes 100 located on the same side (e.g., left or right) are all located on the same side of the corresponding main body portion 106 along the second direction Y; that is, the relative positional relationship between the extensions 108 of the plurality of first touch electrodes 100 located on the same side and the corresponding main body portion 106 is consistent. For example, Figure 1 In this design, all extensions 108 of the multiple first touch electrodes 100 on the left side are located on the upper side of their respective main body portions 106; and all extensions 108 of the multiple first touch electrodes 100 on the right side are located on the lower side of their respective main body portions 106. This design ensures that the newly introduced extensions 108 do not result in a large spacing between adjacent first touch electrodes 100 arranged at intervals along the second direction Y, thus guaranteeing touch accuracy.

[0052] Another option, such as Figure 1 As shown, the first end portion 1060 and the extension 108 connected to the first end portion 1060 are flush with the outer surface in the first direction X. For example, as Figure 1 As shown in the right-hand side, a first end portion 1060 and an extension 108 connected thereto are flush with the right-side surface in the first direction X. This design reduces the bezel width of the touch panel.

[0053] Please continue reading. Figure 1The plurality of touch electrodes 10 also includes at least two second touch electrodes 102, which extend along a second direction Y and are arranged along a first direction X. The first touch electrode 100 and the second touch electrode 102 are cross-insulated. The discharge initiation voltage of the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128 is less than the discharge initiation voltage at the intersection of the first touch electrode 100 and the second touch electrode 102. When the amount of static electricity accumulates to the point where the voltage between the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128 reaches its discharge initiation voltage, static electricity will be released between the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128. Generally speaking, the intersection of the first touch electrode 100 and the second touch electrode 102 is a relatively weak point in the touch electrode 10, where static electricity is easily coupled and discharged, and there is a possibility of electrostatic breakdown at the intersection of the first touch electrode 100 and the second touch electrode 102. The electrostatic discharge structure formed by the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128 is similar to the structural pattern at the intersection of the first touch electrode 100 and the second touch electrode 102. Since the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128 are relatively small, electrostatic discharge is preferentially released at the location of the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128. To address this issue, this application introduces a first bridging portion 124, and the discharge initiation voltage of the first bridging portion 124 and the corresponding extension portion 108 and / or virtual portion 128 is lower than the discharge initiation voltage at the intersection of the first touch electrode 100 and the second touch electrode 102. In this case, electrostatic discharge is preferentially released at the location of the first bridging portion 124, thereby reducing the amount of electrostatic charge entering the touch electrode 10 and reducing the probability of electrostatic breakdown at the intersection of the first touch electrode 100 and the second touch electrode 102.

[0054] Please continue reading. Figure 1 The main body 106 of the second touch electrode 102 includes a second bridging portion 104, which is located at the intersection of the first touch electrode 100 and the second touch electrode 102. Specifically, as Figure 1As shown, the main body 106 of the first touch electrode 100 includes a plurality of first touch electrode blocks 1000 that are spaced apart and interconnected along a first direction X, and adjacent first touch electrode blocks 1000 are electrically connected through a body portion 1002. The main body 106 of the second touch electrode 102 includes a plurality of second touch electrode blocks 1020 that are spaced apart and interconnected along a second direction Y, and adjacent second touch electrode blocks 1020 are electrically connected through a second bridging portion 104, that is, the second touch electrode blocks 1020 and the second bridging portion 104 are alternately arranged and sequentially connected along the second direction Y. Optionally, the first touch electrode 100 and the second touch electrode block 1020 are disposed in the same layer and made of the same material, that is, the second touch electrode block 1020, the body portion 1002, and the first touch electrode block 1000 are disposed in the same layer and made of the same material; the second touch electrode block 1020 and the second bridging portion 104 are disposed in different layers, and the second touch electrode block 1020 and the second bridging portion 104 are connected by a conductive hole (i.e., Figure 1 The solid black dot in the middle is electrically connected. The structure of the second touch electrode 102 described above is relatively simple and easy to fabricate.

[0055] Optionally, the touch panel includes a substrate and a first conductive layer, an insulating layer, and a second conductive layer sequentially stacked on one side of the substrate. The first touch electrode 100 and the second touch electrode block 1020 are disposed in the same layer and made of the same material, which means they can be obtained by patterning the same conductive layer (e.g., the first conductive layer). The first touch electrode 100 and the second bridging portion 104 are disposed in different layers, for example, the first touch electrode 100 is located in the first conductive layer, and the second bridging portion 104 is located in the second conductive layer.

[0056] Optionally, the impedance of the first bridging portion 124 is greater than or equal to the impedance of the second bridging portion 104; alternatively, the impedance of the extension portion 108 is greater than or equal to the impedance of the second bridging portion 104. Optionally, the impedance of the trace 12 where the first bridging portion 124 is located is less than or equal to the impedance of the second touch electrode 102 where the second bridging portion 104 is located, so that static electricity is preferentially generated and accumulated on the trace, thereby allowing static electricity to preferentially release from the positions corresponding to the extension portion 108 and the first bridging portion 124, reducing the impact on the touch electrode 10. Furthermore, when the discharge current is too large, the first bridging portion 124 is preferentially burned out to prevent the effective body of the trace and the touch electrode from burning out. Optionally, the impedance of the first bridging portion 124 is greater than the impedance of the extension portion 108, so that during static discharge, if the discharge current generated by the static discharge is too large, the high impedance of the first bridging portion 124 generates more heat, preferentially burning out the first bridging portion 124 without burning out the extension portion 108, thus reducing the impact on the touch electrode. Optionally, the impedance of the trace 12 where the first bridge section 124 is located is less than or equal to the impedance of the first touch electrode 100, so as to reduce the accumulation of electrostatic charge on the touch electrode 10.

[0057] Optionally, the area of ​​the orthographic projection of the first bridging portion 124 onto the touch panel (or substrate) is less than or equal to the area of ​​the orthographic projection of the second bridging portion 104 onto the touch panel (or substrate), so that the impedance of the first bridging portion 124 is greater than or equal to the impedance of the second bridging portion 104. Optionally, the area of ​​the orthographic projection of the extension portion 108 onto the touch panel (or substrate) is less than or equal to the area of ​​the orthographic projection of the second bridging portion 104 onto the touch panel (or substrate), so that the impedance of the extension portion 108 is greater than or equal to the impedance of the second bridging portion 104.

[0058] Optionally, the dimension d1 of the first bridging portion 124 corresponding to the extension 108 along the second direction Y is smaller than the dimension d2 of the second bridging portion 104 along the first direction X. That is, in this design, the width of the first bridging portion 124 is smaller than the width of the second bridging portion 104, so that static electricity is preferentially released from the position of the first bridging portion 124, reducing the probability of the second bridging portion 104 being electrostatically broken down.

[0059] And / or, the dimension d3 of the extension 108 along the first direction X is greater than the dimension d1 of the corresponding first bridging portion 124 along the second direction Y. That is, in this design, the width of the first bridging portion 124 is greater than the width of the corresponding extension 108. When electrostatic discharge occurs at the locations of the first bridging portion 124 and the extension 108, electrostatic discharge preferentially occurs at the location of the smaller-width first bridging portion 124, thereby reducing the impact on the touch electrode 10.

[0060] And / or, the dimension d3 of the extension 108 along the first direction X is smaller than the minimum dimension d4 of the portion at the intersection of the main body 106 of the first touch electrode 100 and the second bridging portion 104 along the second direction Y. That is, the dimension d3 of the extension 108 along the first direction X is smaller than the minimum dimension d4 of the main body 1002 of the first touch electrode 100 along the second direction Y. This design allows static electricity to be preferentially discharged from the location of the extension 108, reducing the probability of the main body 1002 being electrostatically damaged.

[0061] And / or, the dimension d2 of the second bridging portion 104 along the first direction X is smaller than the minimum dimension d4 of the portion at the intersection of the main body portion 106 of the first touch electrode 100 and the second bridging portion 104 along the second direction Y; that is, the dimension d2 of the second bridging portion 104 along the first direction X is smaller than the minimum dimension d4 of the main body portion 1002 along the second direction Y. To avoid the second bridging portion 104, which is disposed on a different layer from the first touch electrode 100 and the second touch electrode block 1020, being small in size and easily damaged by static electricity, static discharge structures such as the first bridging portion 124, the extension portion 108 and / or the virtual portion 128 are provided to protect the second bridging portion 104 from static electricity damage.

[0062] In addition, please continue to refer to Figure 1 Multiple first bridge portions 124 correspond to one extension portion 108. This design improves electrostatic discharge efficiency. Optionally, multiple first bridge portions 124 corresponding to the same extension portion 108 are arranged at intervals along the second direction Y. This structural design is relatively simple and easy to fabricate. Furthermore, the first bridge portions 124 and their corresponding extension portions 108 are made of different materials. For example, the extension portion 108 is made of indium tin oxide (ITO), while the first bridge portions 124 are made of at least one of molybdenum (Mo), titanium (Ti), aluminum (Al), copper (Cu), and nano-silver (Ag). The adjacent arrangement of these wires with different materials facilitates electrostatic discharge at this location, improving electrostatic discharge efficiency and reducing the amount of electrostatic charge entering the second bridge portion 104. Optionally, the conductivity of the material of the first bridge portion 124 is greater than that of the material of the extension portion 108. This design allows electrostatic charge to be preferentially released at the first bridge portion 124. The first bridge portion 124 and the main body of the trace 12 to which it is located can be made of the same material. The main body of the wiring 12 may be provided with a first bridging section 124 and / or a virtual section 128.

[0063] Alternatively, the first bridging portion 124 and the second bridging portion 104 are disposed in the same layer and made of the same material; and / or, the first touch electrode 100 and the virtual portion 128 are disposed in the same layer and made of the same material. This design can reduce the difficulty of manufacturing process.

[0064] Preferably, the first touch electrode 100 is made of a light-transmitting and conductive material, and the first bridging portion 124 is made of a metallic material. The design of the first touch electrode 100 can improve the light transmittance of the area where the first touch electrode 100 is located, and the design of the first bridging portion 124 can improve the electrostatic discharge efficiency of the first bridging portion 124.

[0065] Please continue reading. Figure 1 At least a portion of the voltage value on the first bridge portion 124 differs from the voltage value on the corresponding first touch electrode 100 where the extension portion 108 is located. For example, the voltage value of the first bridge portion 124 on the second type of trace may be 0V, while the voltage value of the first touch electrode 100 (i.e., the voltage value at which the first touch electrode 100 operates normally) may be 5V. Due to differences in the distance between different touch electrodes and the bonding area 14, as well as variations in the manufacturing process, the trace lengths connecting different touch electrodes to the bonding area 14 may differ, and the dimensions of different touch electrodes may also differ. Consequently, the voltage transmitted from the bonding area 14 to different touch electrodes may differ, and the voltages of the first bridge portion 124 and the extension portion 108 corresponding to different touch electrodes may also differ. Due to the existence of this voltage difference, static electricity can preferably be discharged at this location, improving the electrostatic discharge efficiency and reducing the amount of static electricity entering the second bridge portion 104.

[0066] In addition, such as Figure 1As shown, the extension 108 is located on the first touch electrode 100, while the second touch electrode 102 does not have an extension 108 to provide clearance for other traces. Of course, in other embodiments, the second touch electrode 102 may also have an extension 108, and this application does not limit this.

[0067] In another implementation, please refer to [link / reference]. Figure 1 The plurality of traces 12 include a plurality of first-type traces 120, which may be referred to as touch traces. Along the length of each first-type trace 120, the first-type trace 120 includes a first connecting portion 1200 and a first extension portion 1202 that are interconnected. Optionally, the first connecting portion 1200 and the first extension portion 1202 are disposed on the same layer as the first bridging portion 124 and are made of the same material.

[0068] The first extension 1202 is located on the side of the first connection portion 1200 near the bonding area 14. The first type trace 120 connected to the first touch electrode 100 away from the bonding area 14 may be located on the outside of the first type trace 120 connected to the first touch electrode 100 near the bonding area 14. Optionally, multiple first type traces 120 may be located on at least one of the two opposite sides of the first touch electrode 100 along the first direction X. Optionally, multiple first type traces 120 may be located on the two opposite sides of the first touch electrode 100 along the first direction X, so that the bezel widths of the touch panel on both sides along the first direction X are the same or similar. The first connection portion 1200 is electrically connected to the first end portion 1060 of the corresponding first touch electrode 100. For example, the first type trace 120 and the first end portion 1060 are disposed in different layers, and a conductive hole (i.e.,...) connects the first connection portion 1200 and the first end portion 1060. Figure 1 (Solid black dots) Electrical connection. At least a portion of the first type of trace 120 has a first bridging portion 124 that crosses and connects with the first extension portion 1202. The first bridging portion 124 is stacked on one side of the first end 1060 of another first touch electrode 100. That is, in the same first type of trace 120, the first touch electrode 100 where the extension portion 108 corresponding to the first bridging portion 124 is located is different from the first touch electrode 100 corresponding to the first connection portion 1200.

[0069] Generally, the orthographic projection of the first extension portion 1202 on the touch panel (or substrate) is located outside the first touch electrode 100. The design of the first bridging portion 124 and the first extension portion 1202 intersecting each other allows the first bridging portion 124 to be stacked on one side of the first end 1060 of another first touch electrode 100. Furthermore, this application does not limit the included angle between the first bridging portion 124 and the first extension portion 1202. In summary, this design introduces the first bridging portion 124 into the touch trace (i.e., the first type trace 120) that is originally electrically connected to the first touch electrode 100, so that the static electricity on the first touch electrode 100 can be quickly released through the first bridging portion 124 on the touch trace. Since the release position is above the first touch electrode 100 that is not electrically connected to the current touch trace, even if the first bridging portion 124 is electrostatically broken down, it will not affect the normal implementation of the touch function.

[0070] Optionally, in the same first type of trace 120, the first touch electrode 100 where the extension 108 corresponding to the first bridging portion 124 is located and the first touch electrode 100 corresponding to the first connecting portion 1200 are arranged adjacent to each other. This design can reduce the impact of the introduction of the first bridging portion 124 on the original touch trace layout and is beneficial to static discharge.

[0071] Please continue reading. Figure 1 The plurality of traces 12 also includes a plurality of second-type traces 122, which include at least one of grounding wires, shielding wires, and electrically floating wires. Optionally, at least some of the second-type traces 122 are provided with a first bridging portion 124 and / or a virtual portion 128. The first bridging portion 124 of at least some of the second-type traces 122 is laminated and insulated from the corresponding extension portion 108 along the thickness direction of the touch panel 1. This design allows static electricity on the first touch electrode 100 to be conducted to the surrounding second-type traces 122 through the first bridging portion 124, thereby further improving static discharge efficiency.

[0072] Optionally, the plurality of first bridging portions 124 arranged along the second direction Y on the second type of trace 122 can correspond to the extension portions 108 on the first end portion 1060 on the same side of the plurality of first touch electrodes 100 to form an electrostatic discharge structure, so as to make full use of the second type of trace 122 for electrostatic discharge and reduce the risk of the first type of trace 120 being damaged by electrostatic discharge.

[0073] Furthermore, at least a portion of the first bridge portion 124 and the corresponding virtual portion 128 are located on different second-type traces 122, and are stacked and insulated along the thickness direction of the touch panel 1 to form an electrostatic discharge structure. This design improves the efficiency of electrostatic discharge between adjacent second-type traces 122, thereby reducing the probability of electrostatic breakdown of the touch electrode 10 (especially the second bridge portion 104).

[0074] For example, such as Figure 1 The two second-type traces 122 on the upper middle side, one of the two adjacent second-type traces 122 includes a first trace portion 1220 and a virtual portion 128 stacked together, and the virtual portion 128 is electrically connected to the first trace portion 1220. For example, the virtual portion 128 and the first trace portion 1220 can be connected through a conductive via (i.e., Figure 1 The solid black dot in the middle represents an electrical connection; the other of two adjacent second-type traces 122 includes an electrically connected second trace portion 1222 and a first bridging portion 124. Optionally, the first trace portion 1220, the second trace portion 1222, and the first bridging portion 124 are arranged on the same layer and made of the same material. The structural design of the virtual portion 128 and the first bridging portion 124 in the two adjacent second-type traces 122 is relatively simple and the manufacturing process is easy to achieve.

[0075] In addition, such as Figure 1 or Figure 2 As shown, the touch panel 1 includes a bonding area 14, into which one end of the plurality of traces 12 extends. The bonding area 14 can be bonded to a chip and / or a flexible circuit board. The location of the first bridging portion 124 designed between two adjacent second-type traces 122 can be located in a blank area adjacent to the bonding area 14 (e.g., ...). Figure 2 (as shown), or, it can be located in a blank area opposite to the bonding area 14 (such as...). Figure 1 (As shown in the diagram). It should be noted that the blank areas mentioned above refer to areas that would not normally be designed with wiring.

[0076] Optionally, such as Figure 1 or Figure 2 As shown, multiple first bridging sections 124 correspond to a virtual section 128. This design can improve electrostatic discharge efficiency.

[0077] Alternatively, the material of the virtual portion 128 may be different from the material of the first bridging portion 124. For example, the material of the virtual portion 128 may be indium tin oxide (ITO), while the material of the first bridging portion 124 may be at least one of molybdenum (Mo), titanium (Ti), aluminum (Al), copper (Cu), or nano-silver. The arrangement of these adjacent wires with different materials facilitates electrostatic discharge at this location, improving electrostatic discharge efficiency and reducing the amount of static electricity entering the second bridging portion 104. Optionally, the conductivity of the material of the first bridging portion 124 may be greater than that of the material of the virtual portion 128.

[0078] Furthermore, the conductivity of the material of the first bridging portion 124 is greater than that of the material of the virtual portion 128. This design facilitates preferential static discharge at the location of the first bridging portion 124. Please refer to [further details]. Figure 1 In the aforementioned virtual portion 128 and touch electrode 10, the portion other than the second bridging portion 104 is located in the first conductive layer. The portion of the second bridging portion 104 and trace 12, excluding the virtual portion 128 (including the first bridging portion 124), is located in the second conductive layer. The first conductive layer and the second conductive layer are stacked, and an insulating layer is provided between the first conductive layer and the second conductive layer. This design can reduce the difficulty of process fabrication.

[0079] Optionally, one of the two extensions 108 provided on the same first touch electrode 100 corresponds to the first bridging portion 124 provided on the first type of trace 120 to form an electrostatic discharge structure, and the other extension 108 corresponds to the first bridging portion 124 provided on the second type of trace 122 to form an electrostatic discharge structure, so as to facilitate wiring.

[0080] Optionally, the extensions 108 on the first side of multiple adjacent first touch electrodes 100 away from the bonding area 14 correspond to the first bridging portions 124 provided on the first type of trace 120, forming an electrostatic discharge structure; the extensions 108 on the second side correspond to the first bridging portions 124 provided on the same second type of trace 122, forming an electrostatic discharge structure; the extensions 108 on the second side of multiple adjacent first touch electrodes 100 close to the bonding area 14 correspond to the first bridging portions 124 provided on the first type of trace 120, forming an electrostatic discharge structure; the extensions 108 on the first side correspond to the first bridging portions 124 provided on the same second type of trace 122, forming an electrostatic discharge structure. The first side and the second side can be opposite each other along the first direction X. This design facilitates wiring and makes the bezel widths of the touch panel on both sides opposite each other along the first direction X balanced.

[0081] Furthermore, the first bridging portion 124 mentioned in the above embodiments can be a straight strip. In other embodiments, such as... Figure 3 As shown, Figure 3 for Figure 1 or Figure 2 A top view schematic diagram of another embodiment of the first bridging portion. Along the length of the first bridging portion 124, the first bridging portion 124 includes a first part 1240, a narrow part 1242, and a second part 1244 connected sequentially. The average width of the narrow part 1242 is smaller than the average width of the first part 1240 and the second part 1244. For example, the shape of the first bridging portion 124 can be dumbbell-shaped. The first bridging portion 124 can be connected to the corresponding trace 12 body via the first part 1240. Optionally, the orthographic projection of the second part 1244 on the touch panel (or substrate) is located within the corresponding extension or virtual portion, while the orthographic projections of the narrow part 1242 and the first part 1240 on the touch panel (or substrate) are located outside the corresponding extension or virtual portion. Because the narrow part 1242 is relatively narrow, a discharge current is generated during electrostatic discharge, and the narrow part 1242 burns out preferentially, reducing the impact on the touch electrode when the first bridging portion 124 burns out.

[0082] Finally, this application also provides a touch display device, which includes the touch panel mentioned in any of the above embodiments. Optionally, a plurality of touch electrodes in the touch panel are located in the display area of ​​the touch display device. The touch display device may include a mobile phone, tablet computer, laptop computer, etc.

[0083] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A touch panel, characterized in that, include: Multiple touch electrodes, each touch electrode comprising a main body portion; Multiple traces are located around the multiple touch electrodes, and at least some of the traces include a first bridging portion. At least some of the touch electrodes also include an extension portion connected to the main body portion. The first bridging portion and the corresponding extension portion are stacked and insulated along the thickness direction of the touch panel. The multiple touch electrodes include at least two first touch electrodes, the main bodies of the at least two first touch electrodes extending along a first direction and arranged along a second direction. The main body portion of the first touch electrode includes two first ends disposed opposite to each other along the first direction. At least one side of the two sides disposed opposite to each other along the second direction of at least some of the first ends is provided with the extension portion.

2. The touch panel according to claim 1, characterized in that, At least a portion of the traces also includes virtual portions, wherein the first bridging portion and the corresponding virtual portion are located on different traces and are stacked and insulated along the thickness direction of the touch panel.

3. The touch panel according to claim 1, characterized in that, The number of extensions between the two first ends on the same side of two adjacent first touch electrodes is one.

4. The touch panel according to claim 1, characterized in that, Each of the first ends of the first touch electrode is provided with an extension.

5. The touch panel according to claim 1, characterized in that, The two extended portions of the first touch electrode are respectively located on both sides of its main body, which are disposed opposite to each other along the second direction.

6. The touch panel according to claim 1, characterized in that, The plurality of touch electrodes further includes at least two second touch electrodes, which extend along the second direction and are arranged along the first direction; The first touch electrode and the second touch electrode are cross-insulated; The discharge initiation voltage of the first bridging portion and the corresponding extension portion is less than the discharge initiation voltage at the intersection of the first touch electrode and the second touch electrode.

7. The touch panel according to claim 2, characterized in that, The plurality of touch electrodes further includes at least two second touch electrodes, which extend along the second direction and are arranged along the first direction; The first touch electrode and the second touch electrode are cross-insulated; the discharge initiation voltage of the first bridging portion and the corresponding virtual portion is less than the discharge initiation voltage at the intersection of the first touch electrode and the second touch electrode.

8. The touch panel according to claim 1, characterized in that, The plurality of touch electrodes further includes at least two second touch electrodes, which extend along the second direction and are arranged along the first direction; The first touch electrode and the second touch electrode are intersected and insulated from each other; the main body of the second touch electrode includes a second bridging portion located at the intersection of the first touch electrode and the second touch electrode.

9. The touch panel according to claim 8, characterized in that, The dimension of the first bridging portion corresponding to the extension along the second direction is smaller than the dimension of the second bridging portion along the first direction.

10. The touch panel according to claim 6, characterized in that, The dimension of the extension along the first direction is greater than the dimension of the corresponding first bridging portion along the second direction.

11. The touch panel according to claim 8, characterized in that, The dimension of the extension along the first direction is smaller than the minimum dimension along the second direction of the portion at the intersection of the main body of the first touch electrode and the second bridging portion.

12. The touch panel according to claim 8, characterized in that, The dimension of the second bridging portion along the first direction is smaller than the minimum dimension of the portion at the intersection of the main body of the first touch electrode and the second bridging portion along the second direction.

13. The touch panel according to claim 8, characterized in that, The impedance of the first bridging portion is greater than or equal to the impedance of the second bridging portion; the impedance of the extension portion is greater than or equal to the impedance of the second bridging portion.

14. The touch panel according to claim 8, characterized in that, The impedance of the trace where the first bridging section is located is less than or equal to the impedance of the second touch electrode where the second bridging section is located.

15. The touch panel according to claim 8, characterized in that, The first bridging section and the second bridging section are arranged on the same layer and are made of the same material.

16. The touch panel according to any one of claims 6-8, characterized in that, The first touch electrode and the second touch electrode are one of the touch driving electrode and the touch sensing electrode, respectively.

17. The touch panel according to claim 8, characterized in that, The second touch electrode also includes a plurality of second touch electrode blocks, which are alternately arranged and sequentially connected to the second bridging portion along the second direction; the first touch electrode and the second touch electrode blocks are disposed in the same layer and are made of the same material.

18. The touch panel according to claim 17, characterized in that, The first touch electrode is made of a light-transmitting and conductive material, and the first bridging portion is made of a metal material.

19. The touch panel according to claim 1, characterized in that, The plurality of traces includes a plurality of first type traces, wherein the first type of traces includes interconnected first connection portions and first extension portions; The first connecting portion is electrically connected to the first end of the corresponding first touch electrode; at least a portion of the first extension of the first type of trace is provided with a first bridging portion that intersects and connects with the first extension. In the same first type of trace, the first touch electrode where the extension corresponding to the first bridging portion is located is different from the first touch electrode corresponding to the first connecting portion.

20. The touch panel according to claim 19, characterized in that, In the same first type of trace, the first touch electrode where the extension of the first bridging portion is located and the first touch electrode where the first connection portion is located are arranged adjacent to each other.

21. The touch panel according to claim 2, characterized in that, A plurality of the first bridging portions correspond to one of the extension portions; and / or, a plurality of the first bridging portions correspond to one of the virtual portions.

22. The touch panel according to claim 1, characterized in that, A plurality of first bridging portions correspond to one of the extension portions; the plurality of first bridging portions corresponding to the same extension portion are arranged along the second direction.

23. The touch panel according to claim 2, characterized in that, The plurality of traces includes a plurality of second-type traces, the second-type traces being provided with a first bridging portion and / or the virtual portion, at least a portion of the first bridging portion and the corresponding virtual portion being located on different second-type traces, and being stacked and insulated along the thickness direction of the touch panel; and / or, at least a portion of the first bridging portion of the second-type traces and the corresponding extension portion being stacked and insulated along the thickness direction of the touch panel.

24. The touch panel according to claim 23, characterized in that, The second type of wiring includes at least one of grounding wire, shielding wire, and electrically floating wire.

25. The touch panel according to claim 2, characterized in that, The conductivity of the material of the first bridging portion is greater than the conductivity of the material of the extension portion and / or the virtual portion.

26. The touch panel according to claim 1, characterized in that, At least a portion of the voltage value on the first bridging portion is different from the voltage value on the touch electrode where the corresponding extension portion is located.

27. The touch panel according to claim 2, characterized in that, The first touch electrode is disposed in the same layer as the virtual part and is made of the same material.

28. A touch display device, characterized in that, Including the touch panel as described in any one of claims 1-27.

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