A touch panel and a touch display device

Abstract

This invention discloses a touch panel and a touch display device, including multiple first touch electrodes and multiple second touch electrodes. A frame area includes multiple first traces and multiple second traces. The first traces are electrically connected to the first touch electrodes one-to-one via first connection terminals, and the second traces are electrically connected to the second touch electrodes one-to-one via second connection terminals. The first connection terminals of at least two adjacent first sub-touch electrodes located at the middle position of the touch area in a second direction are located on the same side of the touch area in the first direction; and / or, the second connection terminals of at least two adjacent second sub-touch electrodes located at the middle position of the touch area in the first direction are located on the same side of the touch area in the second direction. This invention can avoid the maximum impedance difference between the first traces and the second traces, and to a certain extent prevents static electricity from using fixed traces as a discharge path, avoiding static damage to the fixed traces and improving the overall anti-static capability of the device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more particularly to a touch panel and a touch display device. Background Technology

[0002] In recent years, various electronic products have been moving towards easier operation, smaller size, and larger screen size, especially portable electronic products, which have even stricter requirements for size and screen size. Therefore, many electronic products have integrated touch display panels to save space required for keyboards or control buttons, thereby increasing the screen area.

[0003] In existing touch panel designs for wearable products such as smartwatches, touch electrodes in different locations typically have wires entering from both sides of the touch panel and then wound around the bezel to connect to a flexible circuit board. Understandably, the wires entering from the side furthest from the flexible circuit board are longer and have higher impedance, while the wires entering from the side closer to the flexible circuit board are shorter and have lower impedance. However, when this touch panel design encounters high static electricity, the significant impedance difference between the wires will preferentially damage the wires with lower impedance, resulting in a substantial reduction in the overall device's anti-static capability. Summary of the Invention

[0004] This invention provides a touch panel and a touch display device to balance the impedance of the windings of the touch electrodes in the touch panel, thereby avoiding the problem of reduced anti-static capability of the whole device caused by excessive impedance difference.

[0005] In a first aspect, embodiments of the present invention provide a touch panel, including a touch area and a border area surrounding the touch area, the touch panel further including a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the first touch electrodes are insulated from the second touch electrodes;

[0006] Multiple first touch electrodes extend along a first direction and are arranged sequentially along a second direction; multiple second touch electrodes extend along the second direction and are arranged sequentially along the first direction; wherein the first direction intersects the second direction;

[0007] The frame area includes multiple first traces and multiple second traces. The first touch electrode includes a first connection terminal, and the second touch electrode includes a second connection terminal. The first traces are electrically connected to the first touch electrode one-to-one through the first connection terminal, and the second traces are electrically connected to the second touch electrode one-to-one through the second connection terminal.

[0008] At least a portion of the first touch electrode intersects with all of the second touch electrodes, and the first touch electrode intersecting with all of the second touch electrodes is a first sub-touch electrode. The first connection ends of at least two adjacent first sub-touch electrodes located at the middle position of the touch area in the second direction are located on the same side of the touch area in the first direction; and / or,

[0009] At least a portion of the second touch electrode intersects with all of the first touch electrodes, and the second touch electrode that intersects with all of the first touch electrodes is a second sub-touch electrode. The second connection ends of at least two adjacent second sub-touch electrodes located at the middle position of the touch area in the first direction are located on the same side of the touch area in the second direction.

[0010] In a second aspect, embodiments of the present invention also provide a touch display device, including a touch panel as described in any of the first aspects.

[0011] In the technical solution of the present invention, the first connection ends of two adjacent first sub-touch electrodes located at least at the middle position of the touch area in the second direction are located on the same side of the touch area in the first direction; and / or, the second connection ends of two adjacent second sub-touch electrodes located at least at the middle position of the touch area in the first direction are located on the same side of the touch area in the second direction, such that among the first touch electrodes arranged in the second direction, the first connection ends of the first touch electrodes located at the middle position and intersecting with all the second touch electrodes are located on the same side, and among the second touch electrodes arranged in the first direction, the second connection ends of the second touch electrodes located at the middle position and intersecting with all the first touch electrodes are located on the same side. This can at least avoid the maximum impedance difference of the first traces connected to the first touch electrodes, and at least avoid the maximum impedance difference of the second traces connected to the second touch electrodes. This reduces the impedance difference of the traces in the touch panel, thereby preventing static electricity from using fixed traces as a release path to a certain extent, and also preventing fixed traces from being damaged by static electricity. This improves the touch panel's touch malfunction problem and enhances the overall anti-static capability of the device. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an existing touch panel;

[0013] Figure 2 This is a schematic diagram of the structure of a touch panel provided in an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of another touch panel structure provided in an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0016] Figure 5 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0017] Figure 6 This is a partial structural schematic diagram of another touch panel provided in an embodiment of the present invention;

[0018] Figure 7 This is a cross-sectional structural diagram of another touch panel provided in an embodiment of the present invention;

[0019] Figure 8 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0020] Figure 9 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0021] Figure 10 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0022] Figure 11 This is a cross-sectional structural diagram of another touch panel provided in an embodiment of the present invention;

[0023] Figure 12 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0024] Figure 13 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0025] Figure 14 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0026] Figure 15 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0027] Figure 16 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0028] Figure 17 This is a schematic diagram of the structure of another touch panel provided in an embodiment of the present invention;

[0029] Figure 18 This is a schematic diagram of the structure of a touch display device provided in an embodiment of the present invention. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0031] As described in the background section, existing touch panel designs suffer from poor overall anti-static capability. Specifically, Figure 1 This is a structural schematic diagram of an existing touch panel, for reference. Figure 1 The existing touch panel includes a touch area 100 and a frame area 200 surrounding the touch area 100. It also includes multiple first touch electrodes 11 and multiple second touch electrodes 12, which are insulated from each other. Additionally, the frame area 200 includes multiple first traces 21 and multiple second traces 22 (shown as dashed lines in the figure, not indicating any break in the second traces 22). The first touch electrodes 11 include a first connection terminal 101, and the second touch electrodes 12 include a second connection terminal 102. The first traces 21 are electrically connected to the first touch electrodes 11 one-to-one through the first connection terminals 101, and the second traces 22 are electrically connected to the second touch electrodes 12 one-to-one through the second connection terminals 102.

[0032] In such Figure 1The touch panel shown, exemplarily, includes eight first touch electrodes 11 and eight second touch electrodes 12. These two types of touch electrodes intersect each other, thus forming a mutual capacitance touch structure. Taking the first touch electrodes 11 as touch driving electrodes and the second touch electrodes 12 as touch sensing electrodes as an example, T0-T7 represent the eight first touch electrodes 11, and R0-R7 represent the eight second touch electrodes 12. When a touch driving signal is input to one of the first touch electrodes 11 (e.g., T4), if a second touch electrode 12 (e.g., R4) receives an electrical signal different from the other second touch electrodes 12, it can be considered that a sensing signal has been received on that second touch electrode 12 (e.g., R4). This indicates that a touch action exists in the area near the intersection of the first touch electrode 11 and the second touch electrode 12 (T4 and R4). That is, the capacitance formed between the intersecting first touch electrodes 11 and the second touch electrodes 12 can provide feedback on the touch signal, determine the touch position, and thus trigger the corresponding touch command. Based on the above driving principle, both the first touch electrode 11 and the second touch electrode 12 need to be connected to the touch driver chip (not shown in the figure) via traces. On the one hand, these traces provide touch driving signals to the first touch electrode 11; on the other hand, they receive touch sensing signals from the second touch electrode 12. Generally, the traces connecting the first touch electrode 11 and the second touch electrode 12 are located in the frame area 200, and are typically arranged so that the connection ports to the touch electrodes are evenly distributed across the frame area 200. In other words, as... Figure 1 As shown, half of the first touch electrodes 11 (i.e., T0-T3) will have their first traces 21 led out from the bottom, and the other half of the first touch electrodes 11 (i.e., T4-T7) will have their first traces 21 led out from the top. Simultaneously, half of the second touch electrodes 12 (i.e., R0-R3) will have their second traces 22 led out from the left, and the other half of the second touch electrodes 12 (i.e., R4-R7) will have their second traces 22 led out from the right. At this point, in the frame area 200, the connection ports connected to the touch electrodes will be evenly distributed across four areas. The first connection end 101 is the connection port on the first touch electrode 11 that is connected to the first trace 21, and the second connection end 102 is the connection port on the second touch electrode 12 that is connected to the second trace 22. Thus, the first connection end 101 connected to T0-T3, the second connection end 102 connected to R0-R3, the first connection end 101 connected to T4-T7, and the second connection end 102 connected to R4-R7 are evenly distributed in different areas of the frame area 200.

[0033] It is understandable that the top and bottom sides and left and right sides here mainly depend on the extension direction of the first touch electrode 11 and the second touch electrode 12. The ports for connecting the two equally divided parts of the touch electrode 11 and the second touch electrode 12 to the traces are actually arranged on both sides of the extension direction of the touch electrode. When the first touch electrode 11 extends longitudinally, the two parts of the first touch electrode 11 will have traces led out from the top and bottom sides respectively. When the second touch electrode 12 extends laterally, the two parts of the second touch electrode 12 will have traces led out from the left and right sides respectively.

[0034] Of course, such as Figure 1 The touch electrode arrangement of the touch panel shown is only an example of an existing design. In other touch electrode arrangements, there is the same design principle, that is, the same type of touch electrode is divided into two parts, and the connection ports of the two parts of the touch electrode and the wiring are arranged on both sides of its extension direction, so that the connection ports connected to the touch electrode in the frame area are evenly distributed in four areas.

[0035] However, in the existing design described above, because it is necessary to connect the traces to the touch driver chip, an access area (not shown in the figure) is generally set in the bezel area of ​​the touch panel. That is, the traces connected to the touch electrodes will converge and extend to this access area, and a flexible circuit board is bonded to the access area to connect to the touch driver chip. The following is an example. Figure 1 For example, assuming the access area is located on the upper side, it can be understood that the first connection terminal 101 corresponding to T4-T7 (especially T4) is closer to the upper access area, and its corresponding first trace 21 is shorter and has lower impedance. Conversely, the first connection terminal 101 corresponding to T0-T3 (especially T3) is farther from the upper access area, and its corresponding first trace 21 is longer and has higher impedance. Therefore, due to the existing design issues regarding the position of the first connection terminal 101, the first trace 21 corresponding to T4 is the shortest and has the lowest impedance, while the first trace 21 corresponding to T3 is the longest and has the highest impedance. In other words, there is a significant difference in impedance among the first traces 21 connecting the first touch electrode 11. This means that in the event of static electricity, it is easier and more likely to be released from the first trace 21 corresponding to T4, which has the lowest impedance, greatly increasing the probability of damaging the first trace 21 corresponding to T4. This leads to touch malfunctions on the touch panel and reduces the overall anti-static capability of the device.

[0036] To address the aforementioned technical problems, this invention provides a touch panel. The touch panel includes a touch area and a border area surrounding the touch area. The touch panel also includes multiple first touch electrodes and multiple second touch electrodes, with the first touch electrodes being insulated from the second touch electrodes. The multiple first touch electrodes extend along a first direction and are arranged sequentially along a second direction; the multiple second touch electrodes extend along the second direction and are arranged sequentially along the first direction; wherein the first direction and the second direction intersect. The border area includes multiple first traces and multiple second traces. Each first touch electrode includes a first connection terminal, and each second touch electrode includes a second connection terminal. The first traces are electrically connected to the first touch electrodes one-to-one through the first connection terminals, and the second traces are electrically connected to the second touch electrodes one-to-one through the second connection terminals.

[0037] At least a portion of the first touch electrodes intersects with all the second touch electrodes, and the first touch electrodes intersecting with all the second touch electrodes are first sub-touch electrodes. The first connection ends of at least two adjacent first sub-touch electrodes located at the middle position of the touch area in the second direction are located on the same side of the touch area in the first direction; and / or, at least a portion of the second touch electrodes intersects with all the first touch electrodes, and the second touch electrodes intersecting with all the first touch electrodes are second sub-touch electrodes. The second connection ends of at least two adjacent second sub-touch electrodes located at the middle position of the touch area in the first direction are located on the same side of the touch area in the second direction.

[0038] In the technical solution of the present invention, the first connection ends of two adjacent first sub-touch electrodes located at least in the middle position of the touch area in the second direction are located on the same side of the touch area in the first direction; and / or, the second connection ends of two adjacent second sub-touch electrodes located at least in the middle position of the touch area in the first direction are located on the same side of the touch area in the second direction, such that among the first touch electrodes arranged in the second direction, the first connection ends of the first touch electrodes located in the middle position and intersecting with all the second touch electrodes are located on the same side, and among the second touch electrodes arranged in the first direction, the second connection ends of the second touch electrodes located in the middle position and intersecting with all the first touch electrodes are located on the same side. This can at least avoid the maximum impedance difference of the first traces connected to the first touch electrodes, and at least avoid the maximum impedance difference of the second traces connected to the second touch electrodes. This reduces the impedance difference of the traces in the touch panel, thereby preventing static electricity from using fixed traces as a release path to a certain extent, and also preventing fixed traces from being damaged by static electricity. This improves the touch panel's touch malfunction problem and enhances the overall anti-static capability of the device.

[0039] The above is the core idea of ​​this application. The technical solutions in the embodiments of this invention 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 invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] Figure 2 This is a schematic diagram of the structure of a touch panel provided in an embodiment of the present invention, for reference. Figure 2 The touch panel includes a touch area 100 and a border area 200 surrounding the touch area 100. The touch panel also includes multiple first touch electrodes 11 and multiple second touch electrodes 12, with the first touch electrodes 11 and second touch electrodes 12 being insulated from each other. The multiple first touch electrodes 11 extend along a first direction 1 and are arranged sequentially along a second direction 2; the multiple second touch electrodes 12 extend along the second direction 2 and are arranged sequentially along the first direction 1; wherein the first direction 1 and the second direction 2 intersect. The border area 200 includes multiple first traces 21 and multiple second traces 22. The first touch electrodes 11 include a first connection terminal 101, and the second touch electrodes 12 include a second connection terminal 102. The first traces 21 are electrically connected to the first touch electrodes 11 one-to-one through the first connection terminals 101, and the second traces 22 are electrically connected to the second touch electrodes 12 one-to-one through the second connection terminals 102.

[0041] At least a portion of the first touch electrode 11 intersects with all the second touch electrodes 12, and the first touch electrode 11 intersecting with all the second touch electrodes 12 is a first sub-touch electrode 111. The first connection end 101 of at least two adjacent first sub-touch electrodes 111 located at the middle position of the touch area 100 in the second direction 2 is located on the same side of the touch area 100 in the first direction 1; and / or, at least a portion of the second touch electrodes 12 intersects with all the first touch electrodes 11, and the second touch electrode 12 intersecting with all the first touch electrodes 11 is a second sub-touch electrode 122. The second connection end 102 of at least two adjacent second sub-touch electrodes 122 located at the middle position of the touch area 100 in the first direction 1 is located on the same side of the touch area 100 in the second direction 2.

[0042] The intersection of the first touch electrode 11 and the second touch electrode 12 essentially means that two touch electrodes with different extension directions intersect each other. In this case, to ensure mutual insulation between the two touch electrodes, a bridge structure is generally required at the intersection. It is also worth noting that the intersection of the first touch electrode 11 and the second touch electrode 12 here mainly refers to the intersection within the touch area 100; the case where the touch electrodes extend to the frame area to achieve intersection will not be discussed here.

[0043] First, in the example, the first direction 1 is the column direction, and the second direction 2 is the row direction; the first direction 1 and the second direction 2 are perpendicular to each other. Based on this, the first touch electrode 11 and the second touch electrode 12 can respectively serve as touch driving electrodes and touch sensing electrodes to realize touch operation, which will not be elaborated further here. Further, the first connection terminal 101 represents the connection port where the first trace 21 of the frame area 200 connects to the first touch electrode 11, and the second connection terminal 102 represents the connection port where the second trace 22 of the frame area 200 connects to the second touch electrode 12. The position of the first connection terminal 101 represents the position where the first touch electrode 11 leads out of the first trace 21, and the position of the second connection terminal 102 represents the position where the second touch electrode 12 leads out of the second trace 22.

[0044] like Figure 2 As shown, because the touch panel is circular, the length of the first touch electrodes 11 arranged near the edge in the second direction 2 (row direction) is shorter than the length of the first touch electrodes 11 near the center; similarly, the length of the second touch electrodes 12 near the edge in the first direction 1 (column direction) is shorter than the length of the second touch electrodes 12 near the center. Consequently, some of the first touch electrodes 11 (T0, T1, T6, and T7) do not intersect with all the second touch electrodes 12, and some of the second touch electrodes 12 (R0, R1, R6, and R7) do not intersect with all the first touch electrodes 11. However, the second touch electrodes 12 (T2, T3, T4, and T5) arranged near the center in the first direction 1 (column direction) are longer and intersect with all the first touch electrodes 11. Similarly, the first touch electrodes 11 (R2, R3, R4, and R5) arranged near the center in the second direction 2 (row direction) are also longer and intersect with all the second touch electrodes 12. In this embodiment of the invention, a first touch electrode 11 intersecting with all the second touch electrodes 12 is designated as a first sub-touch electrode 111, and a second touch electrode 12 intersecting with all the first touch electrodes 11 is designated as a second sub-touch electrode 122. Furthermore, the first connection end 101 of the first sub-touch electrode 111 located in the middle of the touch area 100 is defined to be on the same side in the first direction 1, and / or, the second connection end 102 of the second sub-touch electrode 122 located in the middle of the touch area 100 is defined to be on the same side in the second direction 2. Essentially, this defines the routing positions of the first sub-touch electrodes 111 and the second sub-touch electrodes 122 arranged in the middle position.

[0045] Specifically, the two adjacent first sub-touch electrodes 111 at the middle position of the touch area 100 in the second direction 2 are actually the two adjacent first sub-touch electrodes 111 located in the middle position among the first touch electrodes 11 arranged sequentially in the touch area 100. In other words, since the touch panel is circular, the two adjacent first sub-touch electrodes 111 located in the middle position can also be understood as the two longest adjacent first sub-touch electrodes 111. Figure 2 Taking the touch panel shown as an example, this refers to T3 and T4. The special feature of the two longest adjacent first sub-touch electrodes 111 is that when the two first sub-touch electrodes 111 respectively lead out the first traces 21 on both sides of the first direction 1, it can be referenced... Figure 1 When the first connection terminal 101 of T3 is located on the lower side and the first connection terminal 101 of T4 is located on the upper side, the two first traces 21 will have the largest length difference among all traces of the touch panel, that is, the largest impedance difference. In this embodiment of the invention, the first connection terminals 101 of the two longest adjacent first sub-touch electrodes 111 are set on the same side, that is, the traces are led out from the same side, which can avoid the formation of the maximum impedance difference between the two traces. For all the first touch electrodes 11, the maximum impedance difference between all the first traces 21 connected to them will be reduced, thereby reducing the impedance difference of the first traces in the touch panel.

[0046] More specifically, in this embodiment of the invention, the connection ends of two adjacent first sub-touch electrodes 111 with the longest length, located in the middle position, are on the same side. For example, they are both located on the side closer to the access area or on the side farther from the access area. For the side closer to the access area, the traces corresponding to the connection ends of the two first sub-touch electrodes 111 are surrounded by other traces in the frame area, that is, the traces corresponding to the two first sub-touch electrodes 111 are located on the inner side. For the side farther from the access area, the traces corresponding to the connection ends of the two first sub-touch electrodes 111 are surrounded by other traces in the frame area, that is, the traces corresponding to the two first sub-touch electrodes 111 are located on the outer side. However, in the prior art, the connection ends of the two adjacent and longest first sub-touch electrodes 111 are respectively located on both sides, so their corresponding traces extend at different positions in the frame area, resulting in significant differences between the two traces, including significant differences in length, which in turn leads to significant differences in impedance. In the above-described embodiment of the invention, the connection ends of the two longest adjacent first sub-touch electrodes 111 are located on the same side. This ensures that the corresponding wiring is basically consistent, avoiding significant differences in the length of the two corresponding wirings. This prevents significant differences in impedance between the wirings of the sequentially arranged first touch electrodes, ensuring that the anti-static capability of each wiring does not change abruptly and avoiding the problem of poor overall anti-static capability caused by significant differences in the anti-static capability of some adjacent wirings. Furthermore, by placing the connection ends of the two longest adjacent first sub-touch electrodes 111 on the same side, especially closer to the access area, the corresponding wiring is surrounded by other wirings in the frame area. For each sequentially arranged first touch electrode, the wiring with the lowest impedance is protected by other wirings, thus ensuring overall anti-static capability and reducing anti-static risk.

[0047] Furthermore, the two adjacent first sub-touch electrodes 111 located in the middle are the longest, meaning they have the largest load. Graphically, these two first sub-touch electrodes 111 with the largest load require the most bridge structures, which are also the weakest points in terms of anti-static capability. Therefore, optimizing and improving the anti-static capability of these first sub-touch electrodes 111 addresses the weakest link in the overall electrostatic risk, maximizing the overall anti-static capability. From a functional perspective, the two adjacent first sub-touch electrodes 111 in the middle are the longest, resulting in the largest number of intersecting second touch electrodes 12, a larger capacitive load, and the largest instantaneous current during charging and discharging. Touch electrodes with the largest load are more prone to risk under the same impedance difference; therefore, from this perspective, the anti-static capability of these first sub-touch electrodes 111 also maximizes the overall anti-static capability of the touch system. Based on this, in this embodiment of the invention, the connection ends of the two longest adjacent first sub-touch electrodes 111 are set on the same side, which can make the two first sub-touch electrodes 111 compensate for the problem of poor antistatic capability and improve the antistatic capability of the wiring as a whole.

[0048] Similarly, for two adjacent second sub-touch electrodes 122 arranged in the first direction 1 (i.e., column direction) and located in the middle position of the touch area 100, setting the second connection end 102 connected to them on the same side of the touch area 100 in the second direction 2 can also avoid the two second traces 22 forming the maximum impedance difference. For all the second touch electrodes 12, the maximum impedance difference between all the corresponding connected second traces 22 will be reduced, thereby reducing the impedance difference of the second traces in the touch panel.

[0049] In summary, by reducing the impedance difference between the first trace and / or the second trace, the embodiments of the present invention can, to a certain extent, prevent static electricity from using fixed traces as a discharge path, thereby avoiding static damage to the fixed traces, improving the touch panel's touch malfunction problem, and enhancing the overall anti-static capability of the device.

[0050] It should be added here that, considering the relative position of the first touch electrode 11 on the touch panel is not absolute, the actual situation of the two adjacent first sub-touch electrodes 111 in the center position may differ. The two adjacent first sub-touch electrodes 111 in the center position can be a first sub-touch electrode 111 located in the exact center and an adjacent first sub-touch electrode 111, or they can be the two first sub-touch electrodes 111 located on either side of the center line and closest to the center line. As can be seen from the above, the same applies to the two adjacent second sub-touch electrodes 122 in the center position, which will not be elaborated further here.

[0051] Specifically, when the first touch electrode 11 and the second touch electrode 12 are arranged evenly and symmetrically on the touch panel, the number of touch electrodes will, to some extent, determine the actual situation of the two adjacent touch electrodes in the center position. It can be imagined that when the number of touch electrodes is odd, there will be one touch electrode in the center position, and the two adjacent touch electrodes in the center position will be the one in the center position and the one next to it. When the number of touch electrodes is even, there will be no touch electrode in the center position, and the two adjacent touch electrodes in the center position will be the two touch electrodes located on either side of the center line and closest to the center line.

[0052] Based on the above situation of the two adjacent touch electrodes at the middle position, continue to refer to... Figure 2 Optionally, there are N1 first touch electrodes 11 intersecting with all the second touch electrodes 12, and there are M1 first connection ends 101 of the first sub-touch electrodes 111 located on the same side of the touch area 100 in the first direction 1, where N1 is a positive even number and N1 and M1 satisfy: M1 > N1 / 2; and / or, there are N2 second touch electrodes 12 intersecting with all the first touch electrodes 11, and there are M2 second connection ends 102 of the second sub-touch electrodes 122 located on the same side of the touch area 100 in the second direction 2, where N2 is a positive even number and N2 and M2 satisfy: M2 > N2 / 2.

[0053] First, this solution essentially provides a configuration scheme for the first connection end 101 of the first sub-touch electrode 111 and the second connection end 102 of the second sub-touch electrode 122. This involves the specific selection of the first sub-touch electrodes 111 with their first connection ends 101 on the same side, and the overall layout of the second sub-touch electrodes 122 with their second connection ends 102 on the same side. Taking the vertically extending first touch electrode 11 as an example, when there is a positive even number of first touch electrodes 11 intersecting with all the second touch electrodes 12, that is, when the number of its first sub-touch electrodes 111 is positive even, then the two adjacent first sub-touch electrodes 111 located in the middle should essentially be the two first touch electrodes 11 closest to the center line on both sides, namely T3 and T4. In this embodiment of the invention, the first connection end 101 connecting these two first touch electrodes 11 is located on the same side of the touch area 100 in the first direction 1, i.e., the column direction. In the example shown in the figure, the connection ends of T3 and T4 are located on the upper side. Based on this, it is also possible to consider setting the first connection end 101 of other parts of the first sub-touch electrode 111 on the same side as the two first sub-touch electrodes 111. Specifically, it is possible to set the first connection end 101 of all the first sub-touch electrodes 111 located on the same side of the center line (taking T4 and all the first sub-touch electrodes 111 to its right as an example in the figure) on the same side (i.e., the upper side) of the first direction 1. At the same time, since the connection end of T3 is also set on the upper side like T4, it is also possible to set the first connection end 101 of some of the first sub-touch electrodes 111 on the left side of T3 to the upper side. Therefore, the first sub-touch electrodes 111 with the first connection end 101 on the upper side should at least include all the first sub-touch electrodes 111 to the right of T3, wherein all the first sub-touch electrodes 111 to the right of T3 are essentially half of the number of first sub-touch electrodes 111. Therefore, the number (M1) of the first touch electrodes 11 located on the same side of the touch area 100 in the first direction 1 should be at least one more than half the total number (N1) of the first sub-touch electrodes 111. Figure 2As shown, T0 and T1, as well as T6 and T7, do not intersect with all the second touch electrodes 12. Only four first touch electrodes 11 (T2-T5) intersect with all the second touch electrodes 12. That is, T2-T5 are all first sub-touch electrodes 111. Therefore, the first connection end 101 of at least three of the four first sub-touch electrodes 111 (T3-T5) is located on the upper side. Thus, the quantitative relationship between N1 and M1 is: M1 > N1 / 2. The above only uses the vertically extending first touch electrode 11 as an example. This quantitative relationship also applies to the horizontally extending second touch electrode 12. That is, the number (M2) of second sub-touch electrodes 122 whose second connection end 102 is located on the same side of the touch area 100 in the second direction 2 should be at least one more than half of the number of second sub-touch electrodes 122 (N2), i.e., M2 > N2 / 2.

[0054] It should be noted that, taking the longitudinally extending first touch electrode as an example, the scheme of setting the above-mentioned number of first touch electrodes 11 essentially places the first connection ends 101 of most of the first touch electrodes 11 on the same side. Therefore, compared to the case where the first touch electrodes 11 are located on opposite sides, the length difference and impedance difference of the first traces 21 connected to them are smaller. With most of the first connection ends 101 of the first touch electrodes 11 located on the same side, the impedance difference between each first trace 21 can be reduced, which also has a positive effect on preventing static electricity from being released through the fixed traces. The same applies to the second touch electrode, and will not be elaborated here.

[0055] Figure 3 This is a schematic diagram of another touch panel structure provided in an embodiment of the present invention, for reference. Figure 3 Optionally, there are N1 first touch electrodes 11 intersecting with all the second touch electrodes 12, and there are M1 first connection ends 101 of the first sub-touch electrodes 111 located on the same side of the touch area 100 in the first direction 1, where N1 is a positive odd number and N1 and M1 satisfy: M1≥(N1+1) / 2; and / or, there are N2 second touch electrodes 12 intersecting with all the first touch electrodes 11, and there are M2 second connection ends 102 of the second sub-touch electrodes 122 located on the same side of the touch area 100 in the second direction 2, where N2 is a positive odd number and N2 and M2 satisfy: M2≥(N2+1) / 2.

[0056] Taking the longitudinally extending first touch electrode 11 as an example, when there is a positive odd number of first touch electrodes 11 intersecting with all the second touch electrodes 12, that is, when the number of its first sub-touch electrodes 111 is a positive odd number, then the two adjacent first sub-touch electrodes 111 located in the middle are essentially one first touch electrode 11 on the center line and one first touch electrode 11 adjacent to it (examples are T4 and T5). In this embodiment of the invention, the first connection end 101 connecting the two first touch electrodes 11 is set on the same side of the touch area 100 in the first direction 1, i.e., the column direction. In the example T4 and T5 in the figure, the connection end is located on the upper side. Based on this, it is also possible to consider setting the first connection end 101 of other parts of the first sub-touch electrodes 111 on the same side as the two first touch electrodes 11. Specifically, it is possible to consider setting the first connection end 101 of all the first sub-touch electrodes 111 located on the same side of the center line (taking all the first sub-touch electrodes 111 to the right of T4 in the figure as an example) on the same side of the first direction 1 (i.e., the upper side). Meanwhile, since the connection end of T4 is also located on the upper side, and the first connection end 101 of the first sub-touch electrode 111 on the left side of T4 can also be located on the upper side. Therefore, the first sub-touch electrode 111 with the first connection end 101 located on the upper side should at least include all the first sub-touch electrodes 111 on T4 and its right side, wherein the sum of all the first sub-touch electrodes 111 on T4 and its right side is substantially equal to half of the total number of first sub-touch electrodes 111 plus one. Therefore, the number (M1) of the first sub-touch electrodes 111 located on the same side of the touch area 100 in the first direction 1 should be at least equal to half of the total number of first sub-touch electrodes 111 (N1) plus one. As shown in the figure, T0 and T1, as well as T7 and T8, do not intersect with all the second touch electrodes 12, but only 5 first touch electrodes 11 (T2-T6) intersect with all the second touch electrodes 12. That is, T2-T6 are all first sub-touch electrodes 111. Then, the first connection end 101 of at least 3 of the 5 first sub-touch electrodes 111 (T4-T6) is located on the upper side. Thus, the quantitative relationship between N1 and M1 is: M1≥(N1+1) / 2. Similarly, this quantitative relationship also applies to the horizontally extended second touch electrode 12, that is, the number (M2) of the second sub-touch electrodes 122 located on the same side of the touch area 100 in the second direction 2 should be at least equal to half of the number of the second sub-touch electrodes 122 (N2) plus one, that is, M2≥(N2+1) / 2.

[0057] Similarly, regardless of whether there are an even number of positive first touch electrodes 11 or an odd number of positive first touch electrodes 11, the purpose of the above two schemes is to place the first connection terminals 101 of the first sub-touch electrodes 111 on the same side as much as possible, so as to reduce the impedance difference between each first trace 21 and have a positive effect on preventing static electricity from being released by the fixed traces. The same applies to the second touch electrodes, which will not be elaborated here.

[0058] like Figure 2 It includes 8 first touch electrodes and 8 second touch electrodes, and Figure 3 The seven first touch electrodes and seven second touch electrodes are merely examples, and the position of the connection between the first sub-touch electrode 111 and the second sub-touch electrode 122 is also an example. Figure 4 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 4 In addition to the two adjacent first sub-touch electrodes 111 in the middle position, the touch panel also includes other first sub-touch electrodes 111. Furthermore, these other first sub-touch electrodes 111 can be configured with their connection ends on the same side as the first sub-touch electrode 111 in the middle position. In other words, besides... Figure 2 As shown, T3-T7 are positioned on the upper outer side, and the connecting end of T2 can also be flipped to the upper side. For example... Figure 2 and Figure 3 Essentially, 8×8 and 7×7 touch electrode arrays are used as examples, and a 9×9 touch electrode array can also be set in practical applications. The embodiments of the present invention provide detailed design schemes for the connection ends of the first and second touch electrodes in 7×7, 8×8 and 9×9 arrays, as detailed in Table 1.

[0059] Table 1 shows the design schemes for different touch panel connection end positions provided in the embodiments of the present invention.

[0060]

[0061]

[0062] The following explanation uses the first touch electrode design 5+2 and the second touch electrode design 5+2 as examples to illustrate the connection end position design scheme in Table 1. (Refer to...) Figure 3 The 5+2 design of the first touch electrode indicates that in this 7×7 touch panel, the connection ends of the five first touch electrodes are located on the upper side, i.e., the connection ends of T2-T6 are located on the upper side; the connection ends of the two first touch electrodes are located on the lower side, i.e., the connection ends of T0 and T1 are located on the lower side. The 5+2 design of the second touch electrode indicates that in this 7×7 touch panel, the connection ends of the five second touch electrodes are located on the left side, i.e., the connection ends of R0-R4 are located on the left side; and the connection ends of the two second touch electrodes are located on the right side, i.e., the connection ends of R5-R6 are located on the right side. Therefore, as... Figure 2 The connection design of the touch panel shown is essentially a 5+3 design for the first touch electrode and a 5+3 design for the second touch electrode; as shown Figure 4 The connection design of the touch panel shown is essentially a first touch electrode design of 6+2 and a second touch electrode design of 5+3.

[0063] Another point I'd like to make is that the above... Figure 2 In the embodiments, the number of the first sub-touch electrode and the second sub-touch electrode are both positive even numbers, or Figure 3 In this embodiment, the number of both the first and second sub-touch electrodes is a positive odd number, mainly because it is suitable for touch panels with central symmetry such as circles. Therefore, the number of the first and second touch electrodes is equal. Of course, different scenarios exist in actual applications. For example, when the touch panel is a rectangle or a near-rectangular shape with unequal length and width, the number of the first and second touch electrodes may not be equal. Therefore, there may also be cases where the number of the first sub-touch electrodes 111 is a positive even number and the number of the second sub-touch electrodes is a positive odd number, or where the number of the first sub-touch electrodes is a positive odd number and the number of the second sub-touch electrodes 122 is a positive even number. In such application scenarios, the connection ends of the first and second sub-touch electrodes can still be designed separately according to the above quantitative relationship, and the number of the first and second sub-touch electrodes is not mutually bound. For example, the following two configuration schemes may also exist:

[0064] There are N1 first touch electrodes 11 that intersect with all the second touch electrodes 12, and there are M1 first connection ends 101 of the first sub-touch electrodes 111 located on the same side of the touch area 100 in the first direction 1. N1 is a positive even number, and N1 and M1 satisfy: M1 > N1 / 2. There are N2 second touch electrodes 12 that intersect with all the first touch electrodes 11, and there are M2 second connection ends 102 of the second sub-touch electrodes 122 located on the same side of the touch area 100 in the second direction 2. N2 is a positive odd number, and N2 and M2 satisfy: M2 ≥ (N2+1) / 2.

[0065] There are N1 first touch electrodes 11 that intersect with all the second touch electrodes 12, and there are M1 first connection ends 101 of the first sub-touch electrodes 111 located on the same side of the touch area 100 in the first direction 1. N1 is a positive odd number, and N1 and M1 satisfy: M1≥(N1+1) / 2; there are N2 second touch electrodes 12 that intersect with all the first touch electrodes 11, and there are M2 second connection ends 102 of the second sub-touch electrodes 122 located on the same side of the touch area 100 in the second direction 2. N2 is a positive even number, and N2 and M2 satisfy: M2>N2 / 2.

[0066] It is understood that the above are design schemes for the connection ends of the first and second sub-touch electrodes. For the design of the connection ends of the first touch electrode that does not intersect with all the second touch electrodes, and the design of the connection ends of the second touch electrode that does not intersect with all the first touch electrodes, the embodiments of the present invention also provide specific schemes. (Continue to refer to...) Figure 2 and Figure 3 Optionally, at least a portion of the first touch electrodes 11 do not intersect with all of the second touch electrodes 12, and the first touch electrodes 11 that do not intersect with all of the second touch electrodes 12 are designated as third sub-touch electrodes 113; at least a portion of the second touch electrodes 12 do not intersect with all of the first touch electrodes 11, and the second touch electrodes 12 that do not intersect with all of the first touch electrodes 11 are designated as fourth sub-touch electrodes 124. The first connection end 101 of the third sub-touch electrode 113 located on the first side of the central axis of the touch area 100 in the second direction 2 is located on the first side of the touch area 100 in the first direction 1, and the first connection end 101 of the third sub-touch electrode 113 located on the second side of the central axis of the touch area 100 in the second direction 2 is located on the second side of the touch area 100 in the first direction 1. The second connection end 102 of the fourth sub-touch electrode 124 located on the first side of the central axis of the touch area 100 in the first direction 1 is located on the second side of the touch area 100 in the second direction 2, and the second connection end 102 of the fourth sub-touch electrode 124 located on the second side of the central axis of the touch area 100 in the first direction 1 is located on the first side of the touch area 100 in the second direction 2.

[0067] by Figure 2For example, the first touch electrodes 11 that do not intersect with all the second touch electrodes 12, i.e., the third sub-touch electrodes 113, are T0 and T1, and T6 and T7. The second touch electrodes 12 that do not intersect with all the first touch electrodes 11, i.e., the fourth sub-touch electrodes 124, are R0 and R1, and R6 and R7. For the longitudinally extending first touch electrodes 11, the third sub-touch electrodes 113 (T0 and T1 and T6 and T7) are actually distributed on both sides of the longitudinal central axis (not shown in the figure). Taking the left side as the first side, the first connection end 101 of the third sub-touch electrodes 113 (T0 and T1) on the left side can be set on the first side (lower side) in the first direction 1, i.e., the column direction. The first connection end 101 of the third sub-touch electrodes 113 (T6 and T7) on the right side can be set on the second side (upper side) in the first direction 1, i.e., the column direction. In other words, the first connection end 101 of the third sub-touch electrodes 113 located on both sides of the longitudinal central axis in the row direction can be selectively set on the upper and lower sides respectively. Similarly, for the second touch electrode 12 extending laterally, the fourth sub-touch electrodes 124 (R0 and R1 and R6 and R7) are actually distributed on both sides of the lateral central axis (not shown in the figure). Continuing with the example of the lower side as the first side, the second connection end 102 of the fourth sub-touch electrode 124 (R6 and R7) located on the lower side can be set on the second side (right side) in the second direction 2, i.e., the row direction, and the second connection end 102 of the fourth sub-touch electrode 124 (R0 and R1) located on the upper side can be set on the first side (left side) in the second direction 2, i.e., the row direction. In other words, the second connection end 102 of the fourth sub-touch electrode 124 located on both sides of the lateral central axis in the column direction can be selectively set on the left and right sides respectively.

[0068] It should be noted that when considering the connection positions of the third or fourth sub-touch electrode individually, the first connection terminals 101 of T0 and T1 and the first connection terminals 101 of T6 and T7 can be freely positioned on the top and bottom sides, and the second connection terminals 102 of R0 and R1 and the second connection terminals 102 of R6 and R7 can be freely positioned on the left and right sides. However, when considering the touch panel as a whole, the connection terminals of the third sub-touch electrode 113 and the fourth sub-touch electrode 124 are mutually restricted. As mentioned above, with the R0 and R1 connection terminals positioned on the left and the R6 and R7 connection terminals positioned on the right, the T0 and T1 connection terminals need to be positioned on the bottom, and the T6 and T7 connection terminals need to be positioned on the top. Alternatively, with the R0 and R1 connection terminals positioned on the right and the R6 and R7 connection terminals positioned on the left, the T0 and T1 connection terminals need to be positioned on the top, and the T6 and T7 connection terminals need to be positioned on the bottom. This solution is primarily because the third sub-touch electrode does not intersect with all the second touch electrodes, and the fourth sub-touch electrode does not intersect with all the first touch electrodes. For the fourth sub-touch electrodes R0 and R1, they do not actually intersect with the third sub-touch electrodes T0, T1, T6, and T7. When the connection points of R0 and R1, located on the upper side in the column direction, are placed on the left side, these connection points actually occupy the upper left edge area of ​​the touch area 100. For T0 and T1, located on the left side in the row direction, their connection points can only be placed on the lower side, that is, on the lower left edge area of ​​the touch area 100. In this case, the connection points of R0 and R1 and the connection points of T0 and T1 will not simultaneously occupy the upper left area of ​​the touch area 100, thus avoiding wiring conflicts between the corresponding traces of R0 and R1 and T0 and T1 in the border area. This allows for the arrangement of only one type of trace in the same area, simplifying the wiring process.

[0069] Figure 5 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 5 In another embodiment of the present invention, at least a portion of the first touch electrodes 11 that do not intersect with all of the second touch electrodes 12 may be selected as third sub-touch electrodes 113; at least a portion of the second touch electrodes 12 that do not intersect with all of the first touch electrodes 11 may be selected as fourth sub-touch electrodes 124. The first connection ends 101 of the third sub-touch electrodes 113 located on both sides of the central axis of the touch area 100 in the second direction 2 are all located on the same side of the touch area 100 in the first direction 1. The second connection ends 102 of the fourth sub-touch electrodes 124 located on both sides of the central axis of the touch area 100 in the first direction 1 are all located on the same side of the touch area 100 in the second direction 2.

[0070] In this embodiment, such as Figure 5 As shown, the first touch electrode 11, i.e., the third sub-touch electrode 113, which does not intersect with all the second touch electrodes 12, includes T0, T1, T6, and T7. T0 and T1 are located on both sides of the longitudinal central axis in the row direction, respectively. The first connection end 101 of the four third sub-touch electrodes 113 is set on the same side (upper side). The purpose is to avoid the first connection end 101 corresponding to the third sub-touch electrodes 113 at different positions being distributed on the upper and lower sides. It can be understood that the difference in the winding distance of the first trace 21 corresponding to each third sub-touch electrode 113 with the connection end on the same side is small in the frame area 200. That is, the length difference of the first trace 21 corresponding to each third sub-touch electrode 113 can be avoided to a large extent, thereby avoiding the large impedance difference of the first trace 21 corresponding to each first touch electrode 11. This can also prevent static electricity from using fixed traces as the release path and avoid the fixed traces from being damaged by static electricity. It can also improve the touch panel's touch failure problem and improve the overall anti-static capability of the device. Similarly, for the second touch electrode extending laterally, the second touch electrode 12 that does not intersect with all the first touch electrodes 11, i.e. the fourth sub-touch electrode 124, includes R0, R1, R6, and R7. R0 and R1 are located on both sides of the horizontal central axis in the column direction, respectively. The second connection ends 102 of the four fourth sub-touch electrodes 124 are set on the same side (left side) to avoid the second connection ends 102 of the fourth sub-touch electrodes 124 at different positions being distributed on the left and right sides. Thus, the length difference of the second traces 22 connected to the fourth sub-touch electrodes 124 set on the same side will not be too large, which can also avoid large impedance differences among the second traces 22, and help improve the anti-static capability of the whole machine.

[0071] Continue to refer to Figure 5 Furthermore, in an optional embodiment of the present invention, at least one first connection terminal 101 may be adjacent to at least one second connection terminal 102, and the first trace 21 and the second trace 22 that are electrically connected to the adjacent first connection terminal 101 and the second connection terminal 102 extend in parallel.

[0072] Among them, such as Figure 5As shown, the first connection ends 101 of the third sub-touch electrode 113 are all located on the same side of the touch area 100 in the first direction 1, and the second connection ends 102 of the fourth sub-touch electrode 124 are all located on the same side of the touch area 100 in the second direction 2. This results in some connection ends of the first touch electrode 11 and the second touch electrode 12 being located in the same area at the edge of the touch area 100. For example, the connection ends of R0 and R1 and the connection ends of T0 and T1 simultaneously occupy the upper left area of ​​the touch area 100. Considering that the extension directions of the first touch electrode 11 and the second touch electrode 12 are different, the extension directions of the first traces 21 and the second traces 22 connected to them will also be different. However, in this embodiment, the first traces 21 and the second traces 22 that are electrically connected to adjacent first connection ends 101 and second connection ends 102 are set to extend in parallel, which can avoid the problem of messy wiring in the border area and prevent the traces of R0 and R1 and T0 and T1 in the border area 200 from conflicting in the wiring. Figure 5 As shown, R0, R1, T0, and T1 connect to the two first traces 21 and the two second traces 22, which are essentially parallel and alternately arranged. In practical applications, the line width and spacing of adjacent first traces 21 and second traces 22 can be designed to avoid signal interference. It should also be noted that since the first traces 21 and second traces 22 are alternately arranged, rather than the same type of trace being arranged throughout a certain area, and since the traces need to extend and converge to the access area (not shown in the figure), the pins of the touch chip connected to the flexible circuit board via the bonding pads on the access area need to provide touch driving signals or touch sensing signals to the first and second traces respectively, based on the touch signals required by the first and second touch electrodes. That is, the pins of the touch driving chip need to be designed in conjunction with the arrangement of the first and second traces on the touch panel; however, no further restrictions are imposed here.

[0073] Figure 6 This is a partial structural diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 6 ,and Figure 5 The difference is that the border area 200 is also provided with at least one signal shielding line 23, which is located between the first trace 21 and the second trace 22 that are electrically connected to the adjacent first connection terminal 101 and the second connection terminal 102, respectively.

[0074] The signal shielding line 23 here is essentially a trace with a fixed potential. It can be connected to a fixed potential, i.e., receive a signal with a fixed potential. Its main purpose is to separate the adjacent first trace 21 and second trace 22, avoiding interference between different types of touch signals transmitted on the first trace 21 and second trace 22, thus achieving signal shielding. The material of the signal shielding line 23 can be the same as that of the first trace 21 and second trace 22, and it can be manufactured in the same process to avoid increasing the number of processes and save costs. Of course, different materials can also be used to improve the signal shielding performance; no further restrictions are imposed here.

[0075] Continue to refer to Figure 6 Alternatively, the linewidth D3 of the signal shielding line 23 can be smaller than the linewidths D1 and D2 of the first trace 21 and the second trace 22. The linewidth refers to the width of the trace perpendicular to its extension direction, and the trace width affects its impedance performance to some extent. It can be understood that, on the one hand, the first trace 21 and the second trace 22 need to transmit touch signals, and their impedance affects the voltage drop of the touch signal on the first trace 21 and the second trace 22; on the other hand, the linewidth of the trace also affects the width of the bezel area it occupies, impacting the design of narrow-bezel products. Therefore, considering all three types of traces, setting the linewidth of the signal shielding line 23 to be smaller than the linewidths of the first trace 21 and the second trace 22 can avoid the increased voltage drop of the touch signal due to excessively narrow linewidths of the first trace 21 and the second trace 22, preventing poor touch signal sensing, and can also, to some extent, avoid an excessively large bezel area, which is beneficial for achieving a narrow-bezel design and increasing the screen-to-body ratio.

[0076] Figure 7 This is a cross-sectional structural diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 7 In another embodiment of the present invention, optionally, the first trace 21 and the second trace 22 are located in different film layers in the direction perpendicular to the plane of the touch panel, and a signal shielding layer 230 is provided between the film layers where the first trace 21 and the second trace 22 are located, and the signal shielding layer 230 is insulated from the first trace 21 and the second trace 22 respectively.

[0077] First refer to Figure 5 As shown, placing some connection points of the first touch electrode 11 and the second touch electrode 12 in the same area at the edge of the touch area 100, for example, the connection points of R0 and R1 and the connection points of T0 and T1 simultaneously occupying the upper left area of ​​the touch area 100, will to some extent cause signal interference between the first trace 21 and the second trace 22. Furthermore, since the first trace 21 and the second trace 22 extend in parallel, the total width occupied by the traces in this area will be too large, affecting the narrow bezel design. And as... Figure 7In the illustrated embodiment, the first trace 21 and the second trace 22 are not located on the same film layer. It is conceivable that when the first trace 21 and the second trace 22 are extended from the first connection end 101 and the second connection end 102 to the access area, respectively, the two traces can extend freely within their respective film layers without being restricted by the other trace. Therefore, the total width of the traces in this area can be reduced, which is beneficial for narrow bezel design. Furthermore, setting a signal shielding layer 230 between the film layers containing the two traces can also effectively shield against signal interference. It should be noted that the signal shielding layer 230 can be a metal layer connected to a fixed potential to achieve signal shielding. Of course, it can also simply be a thicker insulating layer, utilizing a relatively thick distance to achieve signal shielding between the two trace layers; no further limitations are imposed here.

[0078] As described in the above embodiments, taking the third sub-touch electrode as an example, since it does not intersect with all the second touch electrodes, the position of the first connection end needs to take into account the setting position of the second connection ends during design, so as to avoid being set in the same edge area of ​​the touch area, i.e., it will be restricted by the second connection ends. For the first sub-touch electrode, since it intersects with all the second touch electrodes, while satisfying the core solution of this invention, the position of the first connection end can be freely set on the upper and lower sides, i.e., it can be freely flipped, for example, except... Figure 2 As shown, the connection terminals of T3 and T4 can be placed on the upper side or the lower side. Both methods avoid the problem of maximum length difference between the first traces caused by the connection terminals of T3 and T4 being on different sides. This also avoids the maximum impedance difference between the first traces and improves the overall anti-static capability of the device. The same applies to the second touch electrode, which will not be elaborated here.

[0079] Of course, in practical applications, in addition to considering electrostatic discharge, the transmission performance of touch signals on the traces also needs to be considered. It's understandable that the higher the impedance on the trace, the greater the voltage drop experienced by the touch signal during transmission, which affects the accuracy of the touch signal and consequently, the touch performance. Therefore, when setting the location of the connection terminals, it's necessary to consider not only the maximum impedance difference between the traces but also the impact of the connection terminal location on the impedance value of each trace itself.

[0080] Figure 8 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 8 Optionally, the border area 200 includes an access area 210, which is located on the first side of the touch area 100 in the first direction 1. At least the first connection ends 101 of two adjacent first sub-touch electrodes 111 located at the middle position of the touch area 100 in the second direction 2 are located on the first side of the touch area 100 in the first direction 1.

[0081] Taking the first side of the first direction 1 as the upper side as an example, this means that the access area 210 is located on the upper side of the touch area 100. Correspondingly, the two adjacent first sub-touch electrodes 111 in the middle position, that is, the two longest adjacent first touch electrodes 11, have their first connection ends 101 actually located on the side where the access area 210 is located in this embodiment. Therefore, the first connection end 101 is close to the access area 210, and the extension length of the first trace 21 is relatively short. Thus, the impedance of the first trace 21 of this part of the first touch electrode 11 is not too high, so it can be ensured that this part of the first touch electrode 11 can receive or feedback touch signals more accurately, thus ensuring touch performance. In other words, in this embodiment of the invention, it is preferable to set the first connection ends 101 of the two adjacent first sub-touch electrodes 111 in the middle position of the second direction 2 on the side where the access area 210 is located, that is, the side close to the access area 210. At this time, in addition to improving the anti-static difference of the corresponding traces of the two first sub-touch electrodes 111 and enhancing the anti-static capability, the access area set in the frame area is mainly used to set pads to connect traces. Obviously, by setting the connection end of the two first sub-touch electrodes 111 close to the access area 210, the traces can be directly connected to the pads, thereby avoiding their extension in other positions in the frame area, saving the area of ​​the frame area, and to a certain extent, it is also beneficial to the design of narrow bezels.

[0082] It should be noted that, in this embodiment, since the access area 210 is located on the upper side, for the laterally extending second touch electrode 12, placing the connection end connecting it to the second trace 22 on the left or right side has little impact on the length of the second trace 22, that is, a small impact on the impedance of the second trace 22. Therefore, in this embodiment, the position of the second connection end 102 is not limited in any way, and it can be as follows: Figure 8 As shown, the second connection end 102 is partially located on the left and partially on the right, thus ensuring that the number of traces in the left and right border areas is not significantly different, guaranteeing the uniformity of the left and right border areas. Of course, Figure 8 The configuration of the second connection terminal 102 shown is merely an example. Its configuration is more flexible, and those skilled in the art can design it independently according to actual needs. This is not a limitation.

[0083] It should also be noted that, in other embodiments of the present invention, the access area can be located on the first side of the touch area in the second direction, such as the left side. The second connection ends of at least two adjacent second sub-touch electrodes located in the middle of the touch area in the first direction—that is, the two longest adjacent second touch electrodes—can also be located on the first side of the touch area in the second direction, i.e., the left side. In this case, the second connection ends of these second touch electrodes are closer to the access area, and the extension length of the second connection line is shorter, ensuring that these second touch electrodes can more accurately feedback or receive touch signals, thus guaranteeing touch performance. Furthermore, for the first touch electrode, since it extends longitudinally, whether the first connection end is located on the upper or lower side has no significant impact on the length of the first trace connected to it. Therefore, those skilled in the art can freely design the first connection end, and no limitations are imposed here.

[0084] Continue to refer to Figure 8 Optionally, the linewidth D1' of at least a portion of the first trace 21 corresponding to the first sub-touch electrode 111 on the second side of the touch area 100 in the first direction 1 is greater than the linewidth D1 of the first trace 21 corresponding to the first sub-touch electrode 111 on the first side of the touch area 100 in the first direction 1.

[0085] Since the access area 210 is located on the first side (upper side) of the first direction 1, and the first connection end 101 of the middle portion of the first sub-touch trace 111 is also located on the upper side, the first trace 21 connected to the first sub-touch electrode 111 located on the upper frame area 200 by the first connection end 101 not only has a shorter extension length but also a relatively larger number. Conversely, the number of first sub-touch electrodes 111 located on the lower frame area 200 by the first connection end 101 is smaller, and the extension length of the first trace 21 connected to them is relatively longer. In this embodiment, the line width D1' of at least a portion of the first traces 21 corresponding to the first sub-touch electrode 111 on the second side of the first direction 1 is set to be greater than the line width D1' of the first traces 21 corresponding to the first connection terminal 101 on the first side of the first direction 1. Essentially, the first traces 21 corresponding to the first sub-touch electrode 111 that are led out from the same side of the access area 210 are set to be relatively narrow, while the first traces 21 led out from the opposite side of the access area 210 are set to be relatively wide. On the one hand, setting a larger number of first traces 21 on the upper side to be narrower is beneficial to reducing the width of the upper frame area. On the other hand, making the first trace 21, which has a longer extension length on the lower side, wider helps to reduce the impedance of the first trace leading out from the lower side, thus reducing the impact of the first trace 21 on the touch signal. In summary, by reducing the line width of the first trace leading out from the upper frame area in the first trace corresponding to the first sub-touch electrode, or increasing the line width of the first trace leading out from the lower frame area, it is possible to further balance the impedance difference between the first traces, avoid the formation of a fixed electrostatic discharge path due to excessive impedance difference between the first traces, and at the same time balance the width of the upper and lower frame areas, which to some extent helps in the design of narrow bezels.

[0086] In other embodiments of the present invention, when the border area includes an access area and the access area is located on the first side of the touch area in the first direction, the line width of at least a portion of the first trace corresponding to the first connection end located on the second side of the touch area in the first direction may be greater than the line width of the first trace corresponding to the first connection end located on the first side of the touch area in the first direction.

[0087] As above Figure 8In the illustrated embodiment, for a touch panel with a determined access area location, such as the upper side, the line width of some or all of the first traces (in the example of the figure, the first traces corresponding to T0 and T1) extending from the lower side can be set to be relatively wide (represented by thick solid lines), while the line width of all or some of the first traces extending from the upper side (in the example of the figure, the first traces corresponding to T2-T7) can be set to be relatively narrow (represented by thin solid lines). This avoids excessive impedance of the first traces extending from the lower side with a longer extension length, and avoids excessive impedance of the first traces extending from the upper side with a shorter extension length. This balances the impedance difference between the first traces, further preventing static electricity from being discharged through fixed traces, avoiding static damage to the fixed traces, improving the touch panel's touch malfunction problem, and enhancing the overall anti-static capability of the device.

[0088] Figure 9 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 9 In another embodiment of the present invention, optionally, at least one first connection terminal 101 is adjacent to at least one second connection terminal 102, and the frame area 200 further includes at least one signal shielding line 23 and / or grounding line 24 (in the figure, the same trace represents the signal shielding line 23 or the grounding line 24), the signal shielding line 23 and / or grounding line 24 are located between the first trace 21 and the second trace 22 that are electrically connected to the adjacent first connection terminal 101 and the second connection terminal 102, respectively.

[0089] In an optional embodiment of the present invention, a signal shielding line 23 and a grounding line 24 can be provided in the frame area 200. These two types of traces can be optionally arranged between adjacent first traces 21 and second traces 22. The signal shielding line 23 separates adjacent first traces 21 and second traces 22, preventing interference between different touch signals transmitted on the first traces 21 and second traces 22. The grounding line 24 is a trace connected to the ground terminal. The grounding line 24 can be a trace connected to the circuit in the touch area 100, responsible for providing a grounding signal to the circuit in the touch area 100. Of course, it can also simply be a trace that provides an electrostatic discharge path, so that any static electricity that may exist in the panel can be discharged to the ground terminal by the grounding line 24.

[0090] Continue to refer to Figure 9Furthermore, the border area 200 includes an access area 210, which is located on the first side of the touch area 100 in the first direction 1. The area in the border area 200 located on the second side in the first direction 1 and adjacent to the first connection terminal 101 and the second connection terminal 102 is designated as the first region 201, and the other areas in the border area 200 are designated as the second region 202. Optionally, the line widths D3' and D4' of at least a portion of the signal shielding line 23 and / or grounding line 24 located in the first region 201 are greater than the line widths D3" and D4" of the signal shielding line 23 and / or grounding line 24 located in the second region 202.

[0091] The first region 201 essentially refers to the area on the first direction 1 away from the access area 210 and without the first connection terminal 101 and the second connection terminal 102, i.e., without the first trace 21 and the second trace 22. Therefore, a signal shielding line 23 or a grounding line 24 can be arranged in this unused area. It should be noted that the placement, extension length, and connection relationship of the signal shielding line 23 or grounding line 24 in the figure are merely examples. In actual applications, the design can be tailored to specific needs and is not a limitation. Furthermore, since this region is relatively large, the wiring in this region can be specially designed. In this embodiment, the line width of the signal shielding line 23 or grounding line 24 in the first region 201 is set to be relatively wide. This can reduce the impedance of the signal shielding line 23 or grounding line 24 to a certain extent, and also play a positive role in replacing the first trace or the second trace as an electrostatic discharge path, preventing the touch function from being affected by electrostatic discharge.

[0092] It should be noted that although the signal shielding line 23 or grounding line 24 in the first region 201 and the second region 202 have different line widths, they can be the same signal shielding line 23 or grounding line 24. That is, the same trace extends in both the first region 201 and the second region 202, and exhibits different line widths in the two regions. Of course, the above-mentioned line width difference design also applies to the signal shielding line 23 or grounding line 24 that are set independently in the two regions.

[0093] In this embodiment of the invention, at least the first connection ends of two adjacent first touch electrodes located in the middle region are disposed on the same side. Essentially, this means that the two first traces with the greatest potential impedance difference among the first touch electrode connections are disposed on the same side to avoid the maximum impedance difference between the first traces. Furthermore, other first traces that may have significant impedance can also be disposed on the same side to minimize the impedance difference between the first traces. Therefore, this embodiment of the invention also provides relevant solutions for the selection of other first traces that may have significant impedance and can be disposed on the same side, or for the selection of first traces with relatively small impedance that can be disposed on the other side.

[0094] Continue to refer to Figure 2 and Figure 4 Optionally, the first connection terminal 101 of the first sub-touch electrode 111 located at the middle position of the touch area 100 in the second direction 2 is located on the first side of the first direction 1; among the first touch electrodes 11 with the first connection terminal 101 located on the second side of the first direction 1, the resistance value of the first trace 21 with the smallest electrical resistance value is R0; the resistance value of the first trace 21 electrically connected to the first sub-touch electrode 111 located at the middle position of the touch area 100 in the second direction 2 is R1; the resistance value R2 of the first trace 21 electrically connected to the first touch electrode 11 located on the second side of the first direction 1 satisfies: |R2-R1| / |R0-R1|<7.8 / 5.8, R0≤R2. And / or, let the second connection terminal 102 of the second sub-touch electrode 122 located at the middle position of the touch area 100 in the first direction 1 be located on the first side of the second direction 2; among the second touch electrodes 12 with the second connection terminal 102 located on the first side of the first direction 1, the resistance value of the second trace 22 with the smallest electrical resistance value corresponding to the electrical connection is R0'; the resistance value of the second trace 22 corresponding to the second sub-touch electrode 122 located at the middle position of the touch area 100 in the first direction 1 is R1'; the resistance value R2' of the second trace 22 corresponding to the second touch electrode 12 located on the first side of the second direction 2 connected to the second connection terminal 102 satisfies: |R2'-R1'| / |R0'-R1'|≤7.8 / 5.8, R0'≤R2'.

[0095] The following explanation continues using the example of the vertically extending first touch electrode. Firstly, the actual location of the first sub-touch electrode 111, situated at the very center of the touch area 100 in the second direction 2, depends on the number of first touch electrodes 11. When the number of first touch electrodes 11 is odd, there exists a line of first touch electrodes 11 located precisely in the center. And as... Figure 2 As shown, when the number of first touch electrodes 11 is even, the first sub-touch electrode 111 at the middle position refers to T3 and T4.

[0096] like Figure 2 As shown, the first sub-touch electrode 111 in the middle position, namely the first connection terminal 101 of T3 and T4, is located on the upper side. As the first sub-touch electrode 111 in the middle position with the connection terminal on the upper side, the first trace 21 corresponding to T3 and T4 is actually the first trace 21 with the smallest resistance value R1 among all the first traces 21. Among the first traces 21 corresponding to the first touch electrode 11 with the first connection terminal 101 on the lower side, there is also a first trace 21 with the smallest resistance value, for example, the first trace 21 connected to T0, with a resistance value of R0. It can be understood that among the first traces 21 corresponding to the first touch electrode 11 with the connection terminal on the lower side, there is also a first trace 21 with the largest resistance value (for example, T2), which is also the first trace 21 with the largest resistance value among all the first traces 21. The resistance of the first trace 21 corresponding to the first sub-touch electrode 111 with the connection end on the lower side should have a certain upper limit to ensure that the difference between the resistance of the first trace 21 and the resistance of T0 is within an acceptable anti-static range. In other words, the resistance difference of the first traces 21 corresponding to T2 and T0 should be within an acceptable anti-static range. Actual research has found that the resistance R2 of the first trace 21 corresponding to the first touch electrode 11 with the connection end on the lower side should satisfy the following relationship: |R2-R1| / |R0-R1|<7.8 / 5.8, R0≤R2. This ensures that the resistance of each first trace 21 is within an acceptable anti-static range. Here, the acceptable anti-static range represents the range of resistance differences that can improve the overall anti-static capability of the touch panel. It is understandable that, taking T2 as an example, when the resistance value of its trace exceeds this proportional range, it indicates that the resistance value of T2 is too large, and the difference between it and the resistance values ​​of the traces corresponding to R1 (i.e., T3 and T4) is too large. This easily leads to static electricity being released along a fixed path, thus weakening the overall anti-static capability of the device. Similarly, for the horizontally extending second touch electrodes, the resistance values ​​of the second traces corresponding to each second touch electrode satisfy the same proportional condition, i.e., |R2'-R1'| / |R0'-R1'|≤7.8 / 5.8, R0'≤R2', which will not be elaborated further here.

[0097] Continue to refer to the appendix Figure 2 In this embodiment of the invention, the first touch electrode 11 and the second touch electrode 12 each include a plurality of electrode blocks 10 connected in series, and the electrode blocks 10 in the first touch electrode 11 and the electrode blocks 10 in the second touch electrode 12 do not overlap. The connection structure between the electrode blocks 10 in the first touch electrode 11 and the connection structure between the electrode blocks 10 in the second touch electrode 12 form a bridge and are mutually insulated.

[0098] Optionally, the first touch electrode 11 and the second touch electrode 12 are located within the touch area 100. The electrode block 10 located in the middle region of the touch area 100 is the middle electrode block, and the electrode block 10 located in the edge region of the touch area 100 is the edge electrode block. The edge electrode block is formed by cutting an electrode block of the same shape as the middle electrode block through an edge line. The area of ​​the electrode block 10 located in the edge region of the touch area 100 is greater than or equal to 20% of the area of ​​the electrode block 10 located in the middle region of the touch area 100.

[0099] Those skilled in the art will understand that in actual production and manufacturing processes, the shape of a touch panel is usually formed by cutting, while the overall shape of the touch area needs to be designed according to the shape of the touch panel. Therefore, for the electrode blocks of the touch area, they need to be designed and formed by cutting them in a specific shape based on the array of electrode blocks to ensure that the touch area has a shape similar to the entire touch panel. It is understood that when the entire electrode block array is cut and designed according to a specific shape, such as a circle, although the touch area of ​​that specific shape can be formed as a whole, it is conceivable that when the special shape is moved horizontally or vertically relative to the entire electrode block array, the shape and size of the electrode blocks in the cut edge area will change significantly. In other words, the shape and size of the electrode blocks in the edge area are actually determined by the position of the special shape relative to the entire electrode block array. Based on this, in the embodiments of the present invention, the area of ​​the electrode block 10 located in the edge area of ​​the touch area 100 is optionally limited to be greater than or equal to 20% of the area of ​​the electrode block 10 located in the middle area of ​​the touch area 100, thereby indirectly limiting the position of the special shape relative to the entire electrode block array during the cutting process, ensuring that the electrode block 10 in the edge area has a larger area. Since the electrode blocks in the edge area need to be equipped with connection terminals to connect with the traces, this solution can provide a connection surface for the electrode blocks in the edge area that need to be equipped with connection terminals, ensuring that the touch electrodes and traces have a good electrical connection and avoiding poor conductivity.

[0100] Figure 10 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 10 Optionally, at least one first touch electrode 11 located at the upper edge of the touch area 100 in the second direction 2 extends to the frame area 200, and the first touch electrode 11 extending to the frame area 200 is a fifth sub-touch electrode 115; at least one second touch electrode 12 located at the upper edge of the touch area 100 in the first direction 1 extends to the frame area 200, and the second touch electrode 12 extending to the frame area 200 is a sixth sub-touch electrode 126.

[0101] At least a portion of the fifth sub-touch electrode 115 intersects with all the second touch electrodes 12, and the first connection end 101 of the fifth sub-touch electrode 115 intersecting with all the second touch electrodes 12 is located on the same side of the touch area 100 in the first direction 1, along with the first connection end 101 of the first sub-touch electrode 111 located at the most central position of the touch area 100 in the second direction 2. At least a portion of the sixth sub-touch electrode 126 intersects with all the first touch electrodes 11, and the second connection end 102 of the sixth sub-touch electrode 126 intersecting with all the first touch electrodes 11 is located on the same side of the touch area 100 in the second direction 2, along with the second connection end 102 of the second sub-touch electrode 122 located at the most central position of the touch area 100 in the first direction 1.

[0102] In essence, this embodiment extends a portion of the touch electrode into the frame area 200, i.e., it expands the touch electrode outward. Taking the vertically extending first touch electrode 11 as an example, a portion of the first touch electrode 11 extends into the frame area 200 near the left and right edges. That is, an electrode block is still provided in the frame area 200 to connect with the first touch electrode 11 in the touch area 100, thus increasing the length of the fifth sub-touch electrode 115. Similarly, for the horizontally extending second touch electrode 12, a portion of the touch electrode can also extend into the frame area 200, i.e., a portion of the second touch electrode 12 near the top and bottom edges extends into the frame area 200, thus increasing the length of the sixth sub-touch electrode 126. It is understood that by also setting electrode blocks in the border area 200, the length of the first touch electrode 11 in the vertical direction and the length of the second touch electrode 12 in the horizontal direction are essentially extended. This extended portion allows the first touch electrode 11 to intersect with all the second touch electrodes 12, and vice versa. For the fifth sub-touch electrode 115, its connection end can be considered to be located on the upper or lower side. For the sixth sub-touch electrode 126, its connection end can be considered to be located on the left or right side. Based on this, in this embodiment, the connection end of the fifth sub-touch electrode 115 is further located on the side (upper side) where the connection end of the first sub-touch electrode 111 in the middle position is located. This avoids a significant length difference between the fifth sub-touch electrode 115 and the first trace 21 corresponding to the first sub-touch electrode 111 in the middle position, thereby reducing the impedance difference. Similarly, placing the connection end of the sixth sub-touch electrode 126 on the same side (left side) as the connection end of the second sub-touch electrode 122 in the middle position can also avoid a significant length difference between the corresponding second traces 22, thereby reducing the impedance difference and helping to improve the overall anti-static capability of the touch panel.

[0103] Figure 11This is a cross-sectional structural diagram of another touch panel provided by an embodiment of the present invention. In an optional embodiment, at least in the frame area, the electrode blocks 10 in the fifth sub-touch electrode 115 and the sixth sub-touch electrode 126 are located in different film layers from the first trace 21 and the second trace 22 in the direction perpendicular to the plane of the touch panel.

[0104] Here, the fifth sub-touch electrode 115 and the sixth sub-touch electrode 126 are touch electrodes that extend to the frame area, which will occupy the area of ​​the frame area to a certain extent. By placing the electrode block 10 of the two extended touch electrodes in the frame area and the wiring in the frame area, namely the first wiring 21 and the second wiring 22, in different film layers, the electrode block and the wiring can be freely designed in their respective film layers without being restricted by each other. This has a positive effect on reducing the area of ​​the frame area where they are located and helps to achieve the design of a narrow frame.

[0105] Figure 12 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 12 In a preferred embodiment, the electrode blocks 10 located at the beginning and end positions of the fifth sub-touch electrode 115 may extend to the border area 200, and / or the electrode blocks 10 located at the beginning and end positions of the sixth sub-touch electrode 126 may extend to the border area 200.

[0106] This embodiment also considers the narrow bezel design of the touch panel, compared to Figure 10 and Figure 12 It is understood that for the extended first and second touch electrodes, it is preferable to add or supplement an electrode block only at each end, meaning that only the first and last electrode blocks of the extended touch electrode will extend to the border area 200. At this time, based on... Figure 10 Following the same principle, the extended touch electrode not only reduces the impedance difference between the corresponding traces, but also avoids the touch panel's bezel area from increasing too much area due to the addition of electrode blocks, thus taking into account both the touch panel's anti-static design and narrow bezel design.

[0107] Figure 13 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 13 In another optional embodiment, the area of ​​the electrode block 10 located in the border area 200 may be smaller than the area of ​​the electrode block 10 located in the touch area 100 in the fifth sub-touch electrode 115 and the sixth sub-touch electrode 126.

[0108] In this embodiment, the electrode block 10 extending into the border area 200 primarily serves to facilitate the intersection of touch electrodes, thereby simplifying the design of the connection point location, rather than using the electrode block 10 to implement touch functionality within the border area 200. Therefore, the area of ​​the electrode block 10 in this border area 200 can be reduced to decrease its footprint in the border area 200 in a relatively direct manner, thus contributing to the achievement of a narrow bezel design. Figure 13 The shape and size of the electrode block 10 in the border area 200 are merely examples, and those skilled in the art can refer to them for design, without imposing too many restrictions here.

[0109] As in the above embodiment, extending the touch electrodes to the frame area aims to make these touch electrodes intersect with all of the other type of touch electrodes. This facilitates placing the connection terminals on the same side as the connection terminals of the middle touch electrodes, allowing more touch electrodes to have their connection terminals on the same side and reducing impedance differences between the traces corresponding to each touch electrode. Besides the above solution, embodiments of the present invention also provide other methods to increase the number of connection terminals on the same side.

[0110] Figure 14 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 14 Optionally, in the first touch electrode 11 located at the outermost edge in the second direction 2, the electrode blocks 10 at the beginning and end positions are formed by cutting the electrode blocks 10 with the same shape as the electrode blocks in the middle region of the touch area 100 through edge lines, and the electrode blocks 10 at the beginning and end positions are axially symmetrical, with the axis of symmetry parallel to the second direction 2; and / or, in the second touch electrode 12 located at the outermost edge in the first direction 1, the electrode blocks 10 at the beginning and end positions are formed by cutting the electrode blocks 10 with the same shape as the electrode blocks 10 in the middle region of the touch area 100 through edge lines, and the electrode blocks 10 at the beginning and end positions are axially symmetrical, with the axis of symmetry parallel to the first direction 1.

[0111] Taking the horizontally extending second touch electrode 12 as an example, the electrode blocks 10 at the top and bottom edges of the second touch electrode 12 are arranged in an axially symmetrical shape, with the axis of symmetry parallel to the first direction 1. This means that the electrode blocks 10 at both ends of the second touch electrode 12 are axially symmetrical with respect to the longitudinal central axis. Essentially, this arrangement involves placing more electrode blocks 10 in the second touch electrode 12 at the top and bottom edges without changing the shape and size of the touch area.

[0112] As mentioned in the above embodiment, when the cutting shape is moved laterally or longitudinally relative to the entire electrode block array, the shape and size of the electrode blocks in the cut edge region change significantly. The shape and size of the electrode blocks in the edge region are actually determined by the position of the touch panel relative to the entire electrode block array. Furthermore, research has found that the position of the cutting shape relative to the entire electrode block array also determines the number of first touch electrodes (i.e., first sub-touch electrodes) intersecting with all the second touch electrodes, and the number of second touch electrodes (i.e., second sub-touch electrodes) intersecting with all the first touch electrodes. Specifically, Figure 15 This is a schematic diagram of another touch panel structure provided in an embodiment of the present invention, compared with... Figure 14 and Figure 15 When Figure 15 When the circular edge of the touch area 100 moves laterally from left to right relative to the touch electrode array, the electrode block 10 (shown as 1002 in the figure) at the left end of the uppermost second touch electrode 12 (shown as second touch electrode 1220 in the figure) will decrease in size, and a new electrode block 10 (shown as 1002 in the figure) will be added at the right end and gradually increase in size until... Figure 14 As shown, both the left and right electrode blocks 10 are formed by edge line cutting and are symmetrical. At this time, Figure 14 The number of electrode blocks 10 of the second touch electrode 1220 at the outermost edge of the upper middle side will be one more. Figure 14 The second touch electrode 1220 on the uppermost side has 6 electrode blocks. Figure 15 The uppermost second touch electrode 1220 has 5 electrode blocks. Considering the first touch electrode 11 intersecting all the second touch electrodes 12, that is, the first sub-touch electrode 111, which is actually the first touch electrode 11 spanning the outermost edges of the upper and lower second touch electrodes 1220, this first sub-touch electrode 111 will cross the second touch electrode 1220 between two adjacent electrode blocks in the outermost second touch electrode 12. Based on this, it can be known that... Figure 14 In the illustrated embodiment, the second touch electrode 1220 on the upper edge has a large number of electrode blocks, and therefore a large number of first sub-touch electrodes 111 that cross between the electrode blocks of the second touch electrode 1220. Figure 14 The diagram shows five first sub-touch electrodes 111. Figure 15The diagram shows four first sub-touch electrodes 111. Therefore, by designing this electrode block—that is, by adjusting the position of the cut shape relative to the entire electrode block array by moving it left and right—the number of first sub-touch electrodes 111 can be increased. This helps to place the first connection ends 101 of more first touch electrodes 11 on the same side, reducing the length difference between the first traces 21, and thus reducing the impedance difference between each first trace 21. Similarly, for the number of second sub-touch electrodes 122, the relative position needs to be adjusted by moving the cut shape up and down when designing the position relative to the entire electrode block array. This ensures the formation of the maximum number of second sub-touch electrodes 122, which helps to place the second connection ends 102 of more second touch electrodes 12 on the same side, reducing the impedance difference between the second traces 22.

[0113] Optionally, the total length L1 of the first touch electrode located at the outermost edge in the second direction satisfies the following condition with the length P1 of the electrode block in the middle region: L1 = n1 * P1 + C1, where n1 is a positive integer, 0 < C1 < P1, and 0 < C1 / P1 < 20% or 80% < C1 / P1 < 100%, and the area of ​​at least one electrode block located at the beginning and end is less than 70% of the area of ​​the electrode block 10 in the middle region of the touch area 100; and / or, the total length L2 of the second touch electrode located at the outermost edge in the first direction satisfies the following condition with the length P2 of the electrode block in the middle region: L2 = n2 * P2 + C2, where n2 is a positive integer, 0 < C2 < P2, and 0 < C2 / P2 < 20% or 80% < C2 / P2 < 100%, and the area of ​​at least one electrode block located at the beginning and end is less than 70% of the area of ​​the electrode block in the middle region of the touch area.

[0114] Continue to refer to Figure 14 First, it should be noted that when the circular edge of the touch area 100 is moved laterally from left to right relative to the touch electrode array, compared to... Figure 15 Design, Figure 14 The second touch electrode 1220 at the outermost edge of the upper middle side will have one more electrode block 10, provided that the size of the touch area and the electrode block meet certain conditions, as shown in the reference. Figure 14When the total length of the second touch electrode 1220 is approximately an integer multiple of the length of the complete electrode block, i.e., the electrode block 10 in the middle region, it can be seen that when the edge line of the touch area is moved from left to right, the area of ​​the electrode block 1002 at the left end will decrease, while an additional electrode block 1002 will be added at the right end, thereby increasing the number of the second touch electrode 1220 by one. Based on this principle, in this embodiment, the total length L2 of the second touch electrode 1220 located at the outermost position in the first direction 1 can satisfy the following condition with the length P2 of the electrode block 10 in the middle region: L2 = n2 * P2 + C2, where n2 is a positive integer, 0 < C2 < P2, and 0 < C2 / P2 < 20% or 80% < C2 / P2 < 100%, which ensures that the total length of the second touch electrode 1220 at the outermost edge is approximately an integer multiple of the length of the electrode block. Furthermore, in this embodiment, the area of ​​at least one electrode block 10 located at the beginning and end of the second touch electrode 12 is less than 70% of the area of ​​the electrode block 10 in the middle region of the touch area 100. This essentially restricts the electrode blocks 10 located at both ends from being incomplete electrode blocks. This allows the number of electrode blocks in the second touch electrode 12 to increase by one, thereby increasing the number of first sub-touch electrodes 111. This allows the connection ends of more first sub-touch electrodes 111 to be located on the same side, reducing the impedance difference between each second trace 22.

[0115] For the first touch electrodes arranged along the second direction 2, the total length L1 of the first touch electrodes located at the outermost position in the second direction can satisfy the following condition with the length P1 of the electrode block in the middle region: L1 = n1 * P1 + C1, where n1 is a positive integer, 0 < C1 < P1, and 0 < C1 / P1 < 20% or 80% < C1 / P1 < 100%, thus ensuring that the total length of the first touch electrodes at the outermost position is more than an integer multiple of the length of the electrode block. Furthermore, setting the area of ​​at least one electrode block located at the beginning and end positions to be less than 70% of the area of ​​the electrode block 10 in the middle region of the touch area 100 restricts the electrode blocks 10 at both ends from being incomplete electrode blocks. By increasing the number of electrode blocks in the first touch electrode 11 by one, the number of second sub-touch electrodes 122 is increased, and the connection ends of more second sub-touch electrodes 122 are located on the same side, thereby reducing the impedance difference between each first trace 21. Those skilled in the art will understand that the principle of setting the first touch electrode at the outermost edge is the same as that of setting the second touch electrode at the outermost edge, the only difference being the arrangement direction, which will not be illustrated here.

[0116] In other embodiments of the present invention, besides the circular touch area in the above example, the touch area can also be any one of a rounded corner shape or a racetrack shape. Additionally, the touch panel can also be a touch display panel. Compared to a simple touch panel, a touch display panel has the same touch electrode design, both having a touch area and a bezel area, and requiring traces in the bezel area to connect to the touch electrodes in the touch area, thereby providing or receiving touch signals from the touch electrodes.

[0117] Figure 16 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 16 The touch area 100 of the touch panel has a rounded corner shape. Furthermore, optionally all the first touch electrodes 11 intersect with all the second touch electrodes 12, and the first connection ends 101 of all the first touch electrodes 11 are located on the same side (in the example in the figure, they are located on the lower side).

[0118] In this embodiment, the first connection terminals 101 of the first touch electrode 11 are all located on the lower side, so the length difference of each first trace 21 is relatively small. Therefore, the impedance difference between each first trace 21 can be reduced, thereby preventing static electricity from being released and improving the anti-static capability of the whole machine.

[0119] Further reference Figure 16 Optionally, the second connection end 102 of the second touch electrode 12 located on the first side of the central axis of the touch area 100 in the first direction 1 is located on the first side of the touch area 100 in the second direction 2; the second connection end 102 of the second touch electrode 12 located on the second side of the central axis of the touch area 100 in the first direction 1 is located on the second side of the touch area 100 in the second direction 2.

[0120] The first direction 1 is located on the first and second sides of the central axis of the touch area 100, which refers to the upper and lower sides of the horizontal central axis. Here, the second touch electrode 12 is divided into upper and lower parts according to the horizontal central axis. The connection ends of the second touch electrode 12 in the upper part and the second touch electrode 12 in the lower part can be respectively set on the opposite sides of the row direction.

[0121] Figure 17 This is a schematic diagram of another touch panel provided in an embodiment of the present invention, for reference. Figure 17 The touch area 100 of the touch panel also features rounded corners. Figure 16 The difference is that the second connection ends 102 of the second touch electrodes 12 arranged sequentially in the first direction 1 are alternately distributed on both sides of the touch area 100 in the second direction 2.

[0122] Here, the connection end of the second touch electrode 12 is designed differently. In essence, the second touch electrode 12 that extends laterally is designed to have its connection end located on different sides in the horizontal direction according to the rule of alternating arrangement in the vertical direction. In other words, the second touch electrodes 12 with odd numbers in the vertical direction are set on the same side, and the second touch electrodes 12 with even numbers in the vertical direction are set on the other side.

[0123] It should be noted that the above two designs for the connection terminals of the second touch electrode are merely two simple design examples of the present invention. Those skilled in the art can design according to actual circumstances, and no further limitations are imposed here. It should also be noted that, as... Figure 16 and Figure 17 The touch panel with rounded corners shown has a first touch electrode 11 intersecting with all second touch electrodes 12, and a second touch electrode 12 intersecting with all first touch electrodes 11, depending on the small radius of the rounded corners. It can be understood that when the radius of the rounded corners is gradually increased to its limit, a circular touch panel will be formed. That is, in a rounded corner pattern with a large radius, some first touch electrodes 11 do not intersect with the second touch electrodes 12, and some second touch electrodes do not intersect with the first touch electrodes 11. In other words, the situation where the first touch electrodes 11 and the second touch electrodes 12 intersect is more consistent with the pattern of a circular touch panel. Therefore, the design can be carried out according to the above-described embodiment of a circular touch panel. Similarly, for the racetrack-shaped touch panel mentioned in the embodiments of the present invention, the intersection of the touch electrodes in local areas will also conform to the above-mentioned rules of touch panels with small rounded corner radius and rounded corner direction or circular touch panels. Therefore, it can be designed according to the above-mentioned embodiment of touch panels with small rounded corner radius and rounded corner direction or circular touch panels, which will not be repeated here.

[0124] Based on the same inventive concept, embodiments of the present invention also provide a touch display device. Figure 18 This is a schematic diagram of the structure of a touch display device provided in an embodiment of the present invention, as shown below. Figure 18 As shown, the touch display device includes any of the touch panels 1000 provided in the above embodiments. In addition to the touch panel 1000, the touch display device may also include other circuits and devices for supporting the normal operation of the touch display device. The touch display device can be a smart wearable device such as a smartwatch, or a mobile phone, tablet computer, computer, television, in-vehicle display device, etc., and the embodiments of the present invention do not impose any special limitations on this.

[0125] The touch display device includes a touch panel. Therefore, the touch display device also has the beneficial effects of the touch panel in the above embodiments. The similarities can be understood by referring to the explanation of the touch panel above, and will not be repeated here.

[0126] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A touch panel, characterized in that, The touch panel includes a touch area and a border area surrounding the touch area. The touch panel also includes multiple first touch electrodes and multiple second touch electrodes, wherein the first touch electrodes are insulated from the second touch electrodes. Multiple first touch electrodes extend along a first direction and are arranged sequentially along a second direction; multiple second touch electrodes extend along the second direction and are arranged sequentially along the first direction; wherein the first direction intersects the second direction; The frame area includes multiple first traces and multiple second traces. The first touch electrode includes a first connection terminal, and the second touch electrode includes a second connection terminal. The first traces are electrically connected to the first touch electrode one-to-one through the first connection terminal, and the second traces are electrically connected to the second touch electrode one-to-one through the second connection terminal. A portion of the first touch electrode intersects with all the second touch electrodes, and the first touch electrode intersecting with all the second touch electrodes is a first sub-touch electrode; a portion of the first touch electrode does not intersect with all the second touch electrodes, and the first touch electrode not intersecting with all the second touch electrodes is a third sub-touch electrode; the first connection ends of all the first sub-touch electrodes are located on the same side of the touch area in the first direction; and / or, At least a portion of the second touch electrode intersects with all of the first touch electrodes, and the second touch electrode that intersects with all of the first touch electrodes is a second sub-touch electrode; a portion of the second touch electrode does not intersect with all of the first touch electrodes, and the second touch electrode that does not intersect with all of the first touch electrodes is a fourth sub-touch electrode; the second connection ends of all the second sub-touch electrodes are located on the same side of the touch area in the second direction.

2. The touch panel according to claim 1, characterized in that, The first connection end of the third sub-touch electrode located on the first side of the central axis of the touch area in the second direction is located on the first side of the touch area in the first direction, and the first connection end of the third sub-touch electrode located on the second side of the central axis of the touch area in the second direction is located on the second side of the touch area in the first direction. The second connection end of the fourth sub-touch electrode located on the first side of the central axis of the touch area in the first direction is located on the second side of the touch area in the second direction, and the second connection end of the fourth sub-touch electrode located on the second side of the central axis of the touch area in the first direction is located on the first side of the touch area in the second direction.

3. The touch panel according to claim 1, characterized in that, The first connection ends of the third sub-touch electrodes located on both sides of the central axis of the touch area in the second direction are all located on the same side of the touch area in the first direction; The second connection ends of the fourth sub-touch electrodes located on both sides of the central axis of the touch area in the first direction are all located on the same side of the touch area in the second direction.

4. The touch panel according to claim 3, characterized in that, There is at least one first connection terminal adjacent to at least one second connection terminal, and the first and second traces that are electrically connected to the adjacent first and second connection terminals extend in parallel.

5. The touch panel according to claim 4, characterized in that, The border area also includes at least one signal shielding line, which is located between the first trace and the second trace that are electrically connected to the adjacent first connection terminal and second connection terminal, respectively.

6. The touch panel according to claim 5, characterized in that, The line width of the signal shielding line is smaller than the line width of the first trace and the second trace.

7. The touch panel according to claim 1, characterized in that, The first connection end of the first sub-touch electrode, located at the center of the touch area in the second direction, is positioned on the first side of the first direction. The first touch electrode with the first connection terminal located on the second side of the first direction has a resistance value of R0 corresponding to the first trace with the smallest electrical connection resistance value; the first sub-touch electrode located at the middle position of the touch area in the second direction has a resistance value of R1 corresponding to the first trace with the electrical connection resistance value. The resistance value R2 of the first trace that is electrically connected to the first touch electrode located on the second side of the first direction at the first connection terminal satisfies: |R2-R1| / |R0-R1|<7.8 / 5.8, R0≤R2; And / or, the second connection end of the second sub-touch electrode located at the most central position of the touch area in the first direction is located on the first side of the second direction; The second connection terminal is located in the second touch electrode on the first side of the first direction, and the resistance value of the second trace with the smallest electrical resistance value is R0'; the resistance value of the second trace of the second sub-touch electrode located in the middle position of the touch area in the first direction is R1'. The resistance value R2' of the second trace connected to the second touch electrode on the first side of the second direction satisfies: |R2'-R1'| / |R0'-R1'|≤7.8 / 5.8, R0'≤R2'.

8. The touch panel according to claim 1, characterized in that, The first trace and the second trace are located on different film layers in a direction perpendicular to the plane of the touch panel. A signal shielding layer is provided between the film layers of the first trace and the second trace, and the signal shielding layer is insulated from the first trace and the second trace respectively.

9. The touch panel according to claim 1, characterized in that, Both the first touch electrode and the second touch electrode include multiple electrode blocks connected in series. The electrode blocks in the first touch electrode and the electrode blocks in the second touch electrode do not overlap. The connection structure between the electrode blocks in the first touch electrode and the connection structure between the electrode blocks in the second touch electrode form a bridge and are mutually insulated.

10. The touch panel according to claim 9, characterized in that, At least one first touch electrode located at the edge of the touch area in the second direction extends to the border area, and the first touch electrode extending to the border area is a fifth sub-touch electrode; at least one second touch electrode located at the edge of the touch area in the first direction extends to the border area, and the second touch electrode extending to the border area is a sixth sub-touch electrode; At least a portion of the fifth sub-touch electrode intersects with all the second touch electrodes, and the first connection end of the fifth sub-touch electrode that intersects with all the second touch electrodes is located on the same side of the touch area in the first direction as the first connection end of the first sub-touch electrode located at the middle position of the touch area in the second direction. At least a portion of the sixth sub-touch electrode intersects with all of the first touch electrodes, and the second connection end of the sixth sub-touch electrode that intersects with all of the first touch electrodes is located on the same side of the touch area in the second direction as the second connection end of the second sub-touch electrode located at the middle position of the touch area in the first direction.

11. The touch panel according to claim 10, characterized in that, At least in the frame area, the electrode blocks in the fifth sub-touch electrode and the sixth sub-touch electrode are located in different film layers from the first trace and the second trace in a direction perpendicular to the plane of the touch panel.

12. The touch panel according to claim 10, characterized in that, The electrode blocks at the beginning and end of the fifth sub-touch electrode extend to the border area, and / or the electrode blocks at the beginning and end of the sixth sub-touch electrode extend to the border area.

13. The touch panel according to claim 10, characterized in that, In the fifth sub-touch electrode and the sixth sub-touch electrode, the area of ​​the electrode block located in the border area is smaller than the area of ​​the electrode block located in the touch area.

14. The touch panel according to claim 9, characterized in that, The first touch electrode and the second touch electrode are located within the touch area. The electrode block located in the middle region of the touch area is the middle electrode block, and the electrode block located in the edge region of the touch area is the edge electrode block. The edge electrode block is formed by cutting an electrode block with the same shape as the middle electrode block through an edge line. The area of ​​the electrode block located at the edge of the touch area is greater than or equal to 20% of the area of ​​the electrode block located in the middle of the touch area.

15. The touch panel according to claim 9, characterized in that, The electrode blocks located at the beginning and end of the first touch electrode at the outermost edge in the second direction are formed by cutting the electrode blocks with the same shape as the electrode blocks in the middle area of ​​the touch area through edge lines, and the electrode blocks located at the beginning and end are axially symmetrical, with the axis of symmetry parallel to the second direction. And / or, the electrode blocks located at the beginning and end of the second touch electrode at the outermost edge in the first direction are formed by cutting the electrode blocks with the same shape as the electrode blocks in the middle region of the touch area through edge lines, and the electrode blocks located at the beginning and end are axially symmetrical, with the axis of symmetry parallel to the first direction.

16. The touch panel according to claim 1, characterized in that, The total length L1 of the first touch electrode located at the outermost edge in the second direction satisfies the following condition with the length P1 of the electrode block in the middle region: L1 = n1 * P1 + C1, where... n1 is a positive integer, 0 < C1 < P1, and 0 < C1 / P1 < 20% or 80% < C1 / P1 < 100%. The area of ​​at least one electrode block located at the beginning or end is less than 70% of the area of ​​the electrode block in the middle region of the touch area; and / or, The total length L2 of the second touch electrode located at the outermost edge in the first direction satisfies the following condition with the length P2 of the electrode block in the middle region: L2 = n2 * P2 + C2, where n2 is a positive integer, 0 < C2 < P2, and 0 < C2 / P2 < 20% or 80% < C2 / P2 < 100%, and the area of ​​at least one electrode block located at the beginning and end is less than 70% of the area of ​​the electrode block in the middle region of the touch area.

17. The touch panel according to claim 1, characterized in that, All the first touch electrodes intersect with all the second touch electrodes, and the first connection ends of all the first touch electrodes are located on the same side.

18. The touch panel according to claim 17, characterized in that, The second connection end of the second touch electrode located on the first side of the central axis of the touch area in the first direction is located on the first side of the touch area in the second direction; The second connection end of the second touch electrode, located on the second side of the central axis of the touch area in the first direction, is located on the second side of the touch area in the second direction.

19. The touch panel according to claim 17, characterized in that, The second connection ends of the second touch electrodes, which are arranged sequentially in the first direction, are alternately distributed on both sides of the touch area in the second direction.

20. The touch panel according to claim 1, characterized in that, The border area includes an access area, which is located on the first side of the touch area in the first direction. The first connection ends of at least two adjacent first sub-touch electrodes located at the middle position of the touch area in the second direction are located on the first side of the touch area in the first direction.

21. The touch panel according to claim 20, characterized in that, The linewidth of at least a portion of the first trace corresponding to the first sub-touch electrode on the second side of the touch area in the first direction is greater than the linewidth of the first trace corresponding to the first sub-touch electrode on the first side of the touch area in the first direction.

22. The touch panel according to claim 1, characterized in that, The border area includes an access area, which is located on the first side of the touch area in the first direction; The line width of at least a portion of the first trace corresponding to the first connection terminal located on the second side of the touch area in the first direction is greater than the line width of the first trace corresponding to the first connection terminal located on the first side of the touch area in the first direction.

23. The touch panel according to claim 1, characterized in that, There is at least one first connection terminal adjacent to at least one second connection terminal, and the border area further includes at least one signal shielding line and / or grounding line, the signal shielding line and / or the grounding line being located between the first trace and the second trace that are electrically connected to the adjacent first connection terminal and the second connection terminal, respectively.

24. The touch panel according to claim 23, characterized in that, The border area includes an access area, which is located on the first side of the touch area in the first direction; Let the area between the first connection end and the second connection end located on the second side in the first direction in the frame area be the first area, and let the other areas in the frame area be the second area; the line width of at least a portion of the signal shielding line and / or the grounding line located in the first area is greater than the line width of the signal shielding line and / or the grounding line located in the second area.

25. The touch panel according to claim 1, characterized in that, The touch area can be any one of the following: circular, rounded corner, or racetrack-shaped.

26. The touch panel according to claim 1, characterized in that, The touch panel is a touch display panel.

27. A touch display device, characterized in that, Including the touch panel as described in any one of claims 1-26.

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