CN113220159B

CN113220159B - Touch panel and touch display device

Info

Publication number: CN113220159B
Application number: CN202110487890.3A
Authority: CN
Inventors: 李维国; 蔺帅; 张志华
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-11-01
Anticipated expiration: 2041-04-30
Also published as: CN113220159A

Abstract

The present disclosure provides a touch panel and a touch display device, the touch panel including a touch electrode, a plurality of first connection portions and a plurality of second connection portions. The touch electrode comprises a first electrode and a second electrode which are crossed with each other and form a touch unit at the crossed part, the first electrode is disconnected into a plurality of first sub-electrodes from the crossed part, and the second electrode is disconnected into a plurality of second sub-electrodes from the crossed part. The first connecting portion and the second connecting portion are located at the intersection, the first connecting portion and the touch electrode are on the same layer and different from the second connecting portion, and the resistances of the first connecting portion and the second connecting portion are different. In at least one first electrode, part of the adjacent first sub-electrodes are connected through a first connecting portion, and the other part of the adjacent first sub-electrodes are connected through a second connecting portion. In the touch panel, the impedance difference between the channels determined by the first electrode and the second electrode enables the impedance between the channels to be relatively uniform, and the sensitivity of the touch function of the whole touch panel is improved.

Description

Touch panel and touch display device

Technical Field

The present disclosure relates to the field of touch control, and in particular, to a touch panel and a touch display device.

Background

The application of electronic products with touch function is becoming popular in the market, and especially, the capacitive touch panel has the advantages of high sensitivity, stable performance, convenience for application in the flexible field (such as flexible display), and the like, so that the electronic products are becoming popular with users.

However, the current capacitive touch panel is limited to its own structural design, and signals with different intensities need to be applied according to different areas of the touch panel during driving, which complicates a driving method and a circuit structure, and increases cost.

Disclosure of Invention

In view of the above, the present disclosure provides a touch panel and a touch display device, which alleviate or eliminate the problem of impedance difference caused by the provision of a bridge structure (the second connecting portion described below) by adjusting and controlling the position of the bridge structure.

A first aspect of the present disclosure provides a touch panel, which includes a touch functional area and a border area surrounding the touch functional area. The touch panel further comprises a touch electrode, a plurality of first connecting parts and a plurality of second connecting parts. The touch control electrode is positioned in the touch control functional area and comprises a plurality of first electrodes and a plurality of second electrodes, the first electrodes and the second electrodes are arranged in parallel, the first electrodes and the second electrodes are crossed with each other, a touch control unit is formed at each crossed position, each first electrode is divided into a plurality of first sub-electrodes from the crossed position, and each second electrode is divided into a plurality of second sub-electrodes from the crossed position. The first connecting part and the touch electrode are on the same layer and are positioned at the intersection. The layer where the second connecting portion is located is different from the layer where the first connecting portion is located and is located at the intersection, and the resistances of the first connecting portion and the second connecting portion are different. In each touch unit, the first sub-electrodes are connected through one of the first connecting portion and the second connecting portion, and the second sub-electrodes are connected through the other of the first connecting portion and the second connecting portion. The first connecting portions and the second connecting portions are connected to at least one first electrode, that is, in at least one first electrode, some adjacent first sub-electrodes are connected through the first connecting portions, and other adjacent first sub-electrodes are connected through the second connecting portions.

In the above scheme, no matter the first electrode or the second electrode, the first connection portion and the second connection portion are used for connection, and compared with the case that the connection is realized only by the first connection portion or the second connection portion, the impedance difference between the channels determined by the first electrode and the second electrode is reduced, so that the impedance between the channels is relatively uniform, and the sensitivity of the touch function of the whole touch panel is improved.

In one embodiment of the first aspect of the present disclosure, the first connection portion and the correspondingly connected first sub-electrode or second sub-electrode are integrally formed.

In the above solution, the integral molding may be formed by the same continuous film layer through the same process, that is, there is no physical boundary between the two and the materials are the same.

In a touch panel provided in a specific implementation manner of the first aspect of the present disclosure, each first electrode defines a first channel, each second electrode defines a second channel, an overlapping area of each first channel and each second channel is an area where a touch unit is located, and the touch unit is divided into a first type touch unit and a second type touch unit. In the first type of touch unit, the first sub-electrode is connected with the first connecting part, and the second sub-electrode is connected with the second connecting part. In the second type of touch unit, the first sub-electrode is connected with the second connecting portion, and the second sub-electrode is connected with the first connecting portion.

In the above scheme, each channel has the first type of touch unit and the second type of touch unit, which can alleviate the problem of too large impedance difference between channels caused by the touch channel including only the first type of touch unit or the second type of touch unit.

In a touch panel provided in a specific implementation manner of the first aspect of the present disclosure, the same number of first type touch units are disposed in different first channels; and/or the same number of first-type touch units are arranged in different second channels.

In the scheme, the problem of impedance difference among channels can be eliminated, the driving difficulty of each channel is reduced, the design of a background algorithm (related to a driving signal) is simplified, and the design difficulty of a driving circuit (such as parameters of length, sectional area and the like of a signal line) can be simplified.

In a touch panel provided in a specific embodiment of the first aspect of the present disclosure, in any one of the first channel and the second channel, the first type touch units and the second type touch units are alternately arranged.

In the above scheme, the impedance distribution in each channel of the touch panel can be relatively uniform, so that the impedance difference before each channel is further alleviated.

In a touch panel provided in a specific implementation manner of the first aspect of the present disclosure, a frame region includes a terminal region, a plurality of first signal lines, and a plurality of second signal lines. The terminal area is located at one end of the first electrode along an extending direction of the first electrode. The plurality of first signal lines are connected with the first electrodes in a one-to-one correspondence mode and are located between the terminal areas and the first electrodes. The plurality of second signal lines are connected with the second electrodes in a one-to-one correspondence mode.

In the above scheme, the impedance difference of each channel can be regulated and controlled as required by using the arrangement number of the first-type touch units and the second-type touch units in each second channel, so that the problem of unbalanced driving voltage caused by the length difference of the signal lines is offset by using the impedance difference of each second channel, and conversely, the problem of large driving difficulty caused by the fact that the impedance difference of each channel is eliminated by designing the parameters of the signal lines is solved.

In a touch panel provided in a specific implementation manner of the first aspect of the present disclosure, a resistance of the first connection portion is smaller than a resistance of the second connection portion, and a number of the first type touch units in the second channel farther from the terminal area is smaller.

In the above scheme, the number of the first type touch units of the second channels farther from the terminal area is smaller, so that the sum of the impedance of each second channel and the impedance of the corresponding signal line is approximately equal, and a signal with the same parameter (for example, voltage) can be directly applied to each channel through the signal line, so that the problem of driving voltage imbalance caused by the length difference of the signal line is solved by using the impedance difference in each second channel.

In another embodiment of the first aspect of the present disclosure, a resistance of the first connection portion is greater than a resistance of the second connection portion, and the number of the first type touch units in the second channel farther from the terminal area is greater.

In the above scheme, the larger the number of the first type touch units of the second channels farther from the terminal area is, the more the sum of the impedance of each second channel and the impedance of the corresponding signal line is approximately equal, and a signal with the same parameter (for example, voltage) can be directly applied to each channel through the signal line, so that the problem of driving voltage imbalance caused by the length difference of the signal line is solved by using the impedance difference in each second channel.

In a touch panel provided in a specific embodiment of the first aspect of the present disclosure, the extending directions of the second connecting portions in the first type touch unit and the second type touch unit are substantially parallel. For example, further, the extending direction of the second connection portion is substantially parallel to the extending direction of the first electrode.

The second connecting parts and the touch electrodes are different in layer and are actually equivalent to the bridging structures, in the scheme, the extending directions of the bridging structures in the whole touch panel can be basically the same, and when the arrangement of the second connecting parts is designed in the whole touch functional area, the specific positions of the second connecting parts are only required to be considered without considering the extending direction of the second connecting parts, so that the design of the second connecting parts is simplified; in addition, in the process of forming the second connecting part, the similarity of all patterns of the mask plate is high, and the design difficulty of the patterns of the mask plate is simplified, so that the manufacturing process is simplified, and the cost is reduced.

In one embodiment of the first aspect of the present disclosure, in the first type of touch unit, the first connection portion is linear, and an extending direction of the first connection portion intersects with extending directions of the first electrode and the second electrode, in a case where an extending direction of the second connection portion is substantially parallel to an extending direction of the first electrode.

In the above solution, for the first type of touch unit, the first connection portion is linear, so that the connection positions of the second sub-electrode and the second connection portion and the connection positions of the first sub-electrode and the first extension portion are staggered with each other, so that the second sub-electrode actually extends into the first sub-electrode, which increases the interaction between the first sub-electrode and the second sub-electrode, and improves the sensitivity of the touch unit; in addition, the design area of the second sub-electrode is not compressed, but the second sub-electrode extends to the first sub-electrode on the basis of the original design area, so that a touch capacitor formed by the touch unit has larger capacitance, and the touch effect is improved.

In another specific embodiment of the first aspect of the present disclosure, in the first type of touch unit, in a case where an extending direction of the second connecting portion is substantially parallel to an extending direction of the first electrode, the first connecting portion includes a main body portion and extending portions located at two ends of the main body portion, the extending direction of the main body portion is substantially parallel to the extending direction of the second electrode, and the extending portions are connected to the second sub-electrodes.

In the above solution, for the first type of touch unit, the first connection portion has a main body portion and an extension portion, and the connection positions of the second sub-electrode and the second connection portion and the connection positions of the first sub-electrode and the first extension portion are staggered with each other, so that the second sub-electrode actually extends into the first sub-electrode, which increases the interaction between the first sub-electrode and the second sub-electrode, and improves the sensitivity of the touch unit; in addition, the overlapping parts of the second connecting parts and the first connecting parts are few, so that the capacitance of the capacitor generated between the first connecting parts and the second connecting parts is reduced, the electric field is favorably distributed on the first sub-electrode and the second sub-electrode, and the sensitivity of the touch panel is improved.

A touch panel provided in one embodiment of the first aspect of the present disclosure may further include an insulating layer, where the insulating layer is located between the layer where the first connection portion is located and the layer where the second connection portion is located.

In a touch panel according to a first aspect of the present disclosure, an insulating layer covers the electrode layer and the first connection portion, a through hole is provided in the insulating layer, and the second connection portion is connected to the first connection portion and the second connection portion through the through hole.

In the above scheme, the insulating layer is a continuous whole-layer structure, so that the flatness of the touch electrode or the second connecting part can be improved, and the performance of the touch panel can be improved.

In another specific embodiment of the first aspect of the present disclosure, the insulating layer includes a plurality of insulating blocks, and the insulating blocks are located at intersections of the first electrodes and the second electrodes to space the first connection portions and the second connection portions.

In the above scheme, in the process of forming the touch electrode or the second connection portion, holes do not need to be punched in the insulating layer, and the second insulating portion can be naturally connected with the first sub-electrode in the first electrode or the second sub-electrode in the second electrode, so that the manufacturing process of the touch panel is simplified.

A second aspect of the present disclosure provides a touch display device, which includes a display panel and the touch panel of the first aspect, wherein the touch panel is located on the display side of the display panel.

Drawings

Fig. 1 is a schematic plan view illustrating a touch panel according to an embodiment of the present disclosure.

Fig. 2 is an enlarged view of the S1 region of the touch panel shown in fig. 1.

Fig. 3 is an enlarged schematic view of a first type of touch unit in the touch panel shown in fig. 2.

Fig. 4 is a schematic view of a partial structure of the first type of touch unit shown in fig. 3.

Fig. 5 is an enlarged schematic view of a second type of touch unit in the touch panel shown in fig. 2.

Fig. 6 is a schematic view of a partial structure of the second type of touch unit shown in fig. 4.

FIG. 7 is a cross-sectional view of the touch panel shown in FIG. 2 taken along line D1-D2.

Fig. 8 is a schematic plan view of another touch panel according to an embodiment of the disclosure.

Fig. 9 is a schematic plan view illustrating another touch panel according to an embodiment of the disclosure.

Fig. 10 is a schematic structural diagram of a first type of touch unit in another touch panel according to an embodiment of the disclosure.

Fig. 11 is a schematic structural diagram of a second type of touch unit in another touch panel according to an embodiment of the disclosure.

Fig. 12 is a schematic plan view illustrating a partial area of another touch panel according to an embodiment of the present disclosure.

FIG. 13 is a cross-sectional view of the touch panel shown in FIG. 12 taken along line D3-D4.

Fig. 14 is a cross-sectional view of a partial area of another touch panel according to an embodiment of the disclosure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the touch panel, driving electrodes and sensing electrodes are arranged to intersect with each other, the driving electrodes and the sensing electrodes respectively determine different channels, and whether the touch panel is touched can be detected and a touch position can be determined by applying a driving signal to a channel corresponding to the driving electrodes and receiving a signal fed back by a channel corresponding to the sensing electrodes. One of the driving electrodes and the sensing electrodes needs to be disconnected at the intersection, and thus a conductive bridge is required to connect the disconnected driving electrodes or sensing electrodes. However, the conductivity of the material of the conductive bridge and the conductivity of the material of the driving electrode and the conductivity of the material of the sensing electrode are different, that is, the impedance of the channel corresponding to the driving electrode or the sensing electrode provided with the conductive bridge may be increased or decreased, so that the impedance between the channels is different, and the lengths of the signal lines connecting the driving electrode and the sensing electrode are different, which itself generates different voltage consumption, so that the circuit impedance (for example, the impedance of the signal line) needs to be designed in an actual process to alleviate the impedance difference between the signal lines and the impedance difference between different channels, thereby increasing the difficulty of signal driving and processing of the touch panel, increasing the difficulty of structural design and manufacturing process, and increasing the production cost.

An embodiment of the present disclosure provides a touch panel and a touch display device, where the touch panel includes a touch function area and a frame area surrounding the touch function area. The touch panel further comprises a touch electrode, a plurality of first connecting parts and a plurality of second connecting parts. The touch control electrode is positioned in the touch control functional area and comprises a plurality of first electrodes and a plurality of second electrodes, the first electrodes and the second electrodes are arranged in parallel, the first electrodes and the second electrodes are crossed with each other, a touch control unit is formed at each crossed position, each first electrode is disconnected into a plurality of first sub-electrodes from the crossed position, and each second electrode is disconnected into a plurality of second sub-electrodes from the crossed position. The first connecting part and the touch electrode are on the same layer and are positioned at the intersection. The layer where the second connecting portion is located is different from the layer where the first connecting portion is located and is located at the intersection, and the resistances of the first connecting portion and the second connecting portion are different. In each touch unit, the first sub-electrodes are connected through one of the first connecting portion and the second connecting portion, and the second sub-electrodes are connected through the other of the first connecting portion and the second connecting portion. The first connection portion and the second connection portion are connected to at least one first electrode, that is, in at least one first electrode, part of the adjacent first sub-electrodes are connected through the first connection portion, and the other part of the adjacent first sub-electrodes are connected through the second connection portion.

Some of the first sub-electrodes in the first electrodes are connected by first connection portions, and other first sub-electrodes are connected by second connection portions, accordingly, the first sub-electrodes in some touch units are connected by first connection portions, and the second sub-electrodes are connected by second connection portions located in other layers, and the second sub-electrodes in other touch units are connected by first connection portions, and the first sub-electrodes are connected by second connection portions located in other layers, that is, some of the second sub-electrodes in the second electrodes are connected by first connection portions, and other second sub-electrodes are connected by second connection portions. Because the resistances of the first connecting portion and the second connecting portion are different, according to the above scheme, no matter the first electrode or the second electrode, the first connecting portion and the second connecting portion are used for realizing connection, and compared with the connection realized only by the first connecting portion or the second connecting portion, the impedance difference between the channels determined by the first electrode and the second electrode is reduced, so that the impedance between the channels is relatively uniform, and the sensitivity of the touch function of the whole touch panel is improved.

The following describes structures of a touch panel and a touch display device according to at least one embodiment of the present disclosure with reference to the drawings. In addition, in the drawings, a spatial rectangular coordinate system is established with reference to the surface of the touch panel, so as to explain the positions of the structures in the touch panel and the touch display device. In the rectangular spatial coordinate system, the X axis and the Y axis are parallel to the surface of the touch panel, and the Z axis is perpendicular to the surface of the touch panel. In addition, in the drawings, it is assumed that the first electrode and the second electrode are perpendicular to each other, so that the Y axis is set to be parallel to the extending direction of the first electrode and the X axis is set to be parallel to the extending direction of the second electrode.

In at least one embodiment of the present disclosure, as shown in fig. 1 to 7, the touch panel 10 includes a touch functional area 11 and a frame area 12, and the frame area 12 surrounds the touch functional area 11. The touch electrode 100, the first connection portion 210, and the second connection portion 220 are disposed in the touch functional region 11. The first connection portion 210 and the second connection portion 220 have different resistances (or conductivities). The first connection parts 210 and the touch electrodes 100 are disposed on the same layer, the second connection parts 220 are disposed on the other layer, and the first connection parts 210 and the second connection parts 220 are spaced from each other. The touch electrode 100 includes a first electrode 110 and a second electrode 120, and the first electrode 110 and the second electrode 120 intersect to form a touch unit 14 (an area defined by a dashed box in fig. 2). As shown in fig. 2 to 4, in some touch units 14 (e.g., the area where the channels M1 and N1 overlap), the two first sub-electrodes 111 and 112 of the first electrode 110 are connected by a first connection portion 210, and the two second sub-electrodes 121 and 122 of the second electrode 120 are connected by a second connection portion 220. As shown in fig. 2, 5 and 6, in other touch units 14 (e.g., the area where the channels M2 and N1 overlap), the two first sub-electrodes 111 and 112 of the first electrode 110 are connected by the second connection portion 220, and the two second sub-electrodes 121 and 122 of the second electrode 120 are connected by the first connection portion 210. As such, in the channel defined by each first electrode 110 (e.g., channels M1-M5 shown in fig. 1, and described as first channels in some embodiments described below), the channel impedance is the sum of the impedances of the first electrode 110, the first connection portion 110, and the second connection portion 120, i.e., the impedance of each channel includes the impedances of the first connection portion 110 and the second connection portion 120; in addition, in the channel defined by each second electrode 120 (for example, the channels N1 to N4 shown in fig. 1, and referred to as a second channel in some embodiments described below), the channel impedance is the sum of the impedances of the second electrode 120, the first connection portion 110, and the second connection portion 120, that is, the impedance of each channel includes the impedances of the first connection portion 110 and the second connection portion 120, so that the impedance difference between the respective channels is reduced.

In the touch panel provided in at least one embodiment of the present disclosure, the first connection portion and the first sub-electrode or the second sub-electrode connected correspondingly are integrally formed. The integral molding may be formed by the same continuous film layer through the same process, i.e., there is no physical boundary between the two and the material is the same.

For example, as shown in fig. 2 to 7, the first connection portion 210 is on the same layer as the first electrode 110 and the second electrode 120 included in the touch electrode 100. For example, in a process of forming the first connection portion 210 and the touch electrode 100, a conductive material film layer may be formed and then patterned to form the first electrode 110, the second electrode 120, and the first connection portion 210. In the touch unit as shown in fig. 3, the first sub-electrodes 111 and 112 included in the first electrode 110 and the first connection portion 210 are actually formed in the same layer and the same material, and the division of the first sub-electrodes 111 and 112 and the first connection portion 210 into different structures actually divides an integrated structure into regions, i.e., there is no physical boundary between the first sub-electrodes 111 and 112 and the first connection portion 210. Similarly, in the touch unit shown in fig. 5, the division of the second sub-electrodes 121 and 122 and the first connection portion 210 into different structures actually divides an integrated structure into regions, that is, there is no physical boundary between the second sub-electrodes 121 and 122 and the first connection portion 210.

In the touch panel provided in at least one embodiment of the present disclosure, each first electrode determines a first channel, each second electrode determines a second channel, an overlapping area of each first channel and each second channel is an area where a touch unit is located, and the touch unit is divided into a first type touch unit and a second type touch unit. In the first type of touch unit, the first sub-electrode is connected with the first connecting part, and the second sub-electrode is connected with the second connecting part. In the second type of touch unit, the first sub-electrode is connected with the second connecting portion, and the second sub-electrode is connected with the first connecting portion. Each channel is provided with a first type touch unit and a second type touch unit, and the overall impedance of the first type touch unit and the second type touch unit is different, so that the problem of overlarge impedance difference between channels caused by the fact that the touch channels only comprise the first type touch units or the second type touch units can be solved. For example, fig. 2 shows that 5 first electrodes 110 and 4 second electrodes 120,5 of the touch panel respectively define 5 first channels M1 to M5, and 4 second electrodes 120 respectively define 4 second channels N1 to N4. For example, as shown in fig. 2 to 4, if two first sub-electrodes 111 and 112 of the first electrode 110 are connected by a first connection portion 210 and two second sub-electrodes 121 and 122 of the second electrode 120 are connected by a second connection portion 220 in one touch unit, the touch unit is a first-type touch unit a; as shown in fig. 2, 5 and 6, if two first sub-electrodes 111 and 112 of the first electrode 110 are connected by the second connection portion 220 and two second sub-electrodes 121 and 122 of the second electrode 120 are connected by the first connection portion 210 in one touch unit, the touch unit is a second type touch unit B. In this way, each of the first and second channels includes the impedance of the first and

second connection portions

110 and 120, that is, the impedance of each channel includes the impedance of the first and

second connection portions

110 and 120, so that the problem of an excessive difference in impedance between the channels due to only one of the first and

second connection portions

110 and 120 is alleviated.

In an embodiment of the present disclosure, one of the first electrode and the second electrode is a driving electrode, and the other of the first electrode and the second electrode is a sensing electrode. For example, as shown in fig. 2, the first electrode 110 is a sensing electrode, and the second electrode 120 is a driving electrode, so that when performing touch detection, driving signals can be applied to the second channels N1 to N4, and sensing signals of the first channels M1 to M5 can be received, so as to determine whether the touch unit has touch operation. For example, if the touch unit is touched, the capacitance of the capacitor formed by the first sub-electrode and the second sub-electrode in the touch unit changes, and the information of the change (e.g. voltage change) is output as a sensing signal, so as to locate the position of the touched touch unit, and thus locate the touched position.

In the embodiment of the present disclosure, the impedance difference between the first channel and the second channel is adjusted by adjusting the distribution of the first type of touch units and the second type of touch units in the touch panel, the number of the first type of touch units and the second type of touch units included in each first channel or each second channel is not limited, and the number may be specifically adjusted according to actual needs.

For example, in the touch panel provided in some embodiments of the present disclosure, the same number of first type touch units are disposed in different first channels. For example, in the touch panel provided in some embodiments of the present disclosure, the same number of first-type touch units are disposed in different second channels. Therefore, the impedance of each first channel is equal, and/or the impedance of each second channel is equal, so that the problem of impedance difference among the channels is solved, the driving difficulty of each channel is reduced, the design of a background algorithm (related to a driving signal) is simplified, and the design difficulty of a driving circuit (such as parameters of the length, the sectional area and the like of a signal line) can be simplified.

In the touch panel provided in at least one embodiment of the present disclosure, in any one of the first channel and the second channel, the first type touch units and the second type touch units are alternately arranged. Therefore, the impedance distribution in each channel of the touch panel can be relatively uniform, and the impedance difference before each channel is further relieved. For example, as shown in fig. 2 to 6, in each of the first channels M1 to M5 and each of the second channels N1 to N4, the first type touch units a and the second type touch units B are alternately arranged, so that the first type touch units a are not adjacent to each other and the second type touch units B are not adjacent to each other in the entire touch panel. Thus, the impedance difference between the first channels M1 to M5 and the second channels N1 to N4 can be maximally reduced.

In the touch panel provided in at least one embodiment of the present disclosure, the frame area includes a terminal area, a plurality of first signal lines, and a plurality of second signal lines. The terminal area is located at one end of the first electrode along an extending direction of the first electrode. The plurality of first signal lines are connected with the first electrodes in a one-to-one correspondence mode and are located between the terminal areas and the first electrodes. The plurality of second signal lines are connected with the second electrodes in a one-to-one correspondence manner. For example, as shown in fig. 1 and 8, the frame area 12 of the touch panel 10 includes a terminal area 13, and the frame area has a first signal line 310 and a second signal line 320 disposed therein. Fig. 8 shows that 8 first electrodes 110 and 7 second electrodes 120,8 of the touch panel define 8 first channels M1 to M8, respectively, and 7 second electrodes 120 define 7 second channels N1 to N7, respectively. The first signal line 310 is connected to the first electrode 110 to apply signals to or receive signals from the first channels M1 to M8, and the second signal line 320 is connected to the second electrode 120 to apply signals to or receive signals from the second channels N1 to N7. The first signal line 310 and the terminal area 13 are arranged on the same side of the touch-sensitive area 11, and the first signal line 310 is arranged between the terminal area 13 and the touch-sensitive area 11, i.e. one end of the first electrode (or first channel) faces the terminal area 13, e.g. the extension path of at least one first channel passes through the terminal area 13.

For example, terminal areas 13 may be used for connecting external circuitry, such as directly connecting or switching to an IC chip on a flexible circuit board.

It should be noted that, in the embodiment of the present disclosure, in the case that the first signal line is arranged between the terminal area and the touch function area, the second signal line needs to extend to the side of the touch function area where the terminal area is not arranged to be connected with the second electrode in the second channel, that is, the second signal line is arranged with the winding to be connected with the second channel. In some embodiments of the present disclosure, as shown in fig. 8, the second signal lines 320 may be routed from one side of the touch functional area, that is, the second signal lines 320 are disposed on a single side in the frame area 12. For example, in other embodiments of the present disclosure, different second signal lines may be routed from two sides of the touch functional area, that is, the second signal lines are disposed on two sides in the frame area, so as to reduce the widening of the frame area, which is beneficial to the frame narrowing design of the touch functional area.

In the embodiment of the disclosure, as shown in fig. 8, since the distances from the different second channels N1 to N7 to the terminal area 13 are different, the lengths of the respective second signal lines 320 are different, and the impedances of the respective second signal lines 320 are different under the same design condition (e.g., the same material and the same cross-sectional area), so that the impedances of the second channels N1 to N7 can be adjusted, that is, the number ratio of the first type touch units and the second type touch units in each of the second channels N1 to N7 is adjusted to adjust the sum of the impedances of each second channel and the corresponding second signal line, so that the difference between the sum of the impedances of the second channel N1 and the corresponding second signal line and the sum of the impedances of the second channel N7 and the corresponding second signal line is reduced, for example, the difference between the sum of the impedances of the second channel N1 and the corresponding second signal line 320 and the sum of the second channel N7 and the corresponding second signal line 320 (for example, the difference may not be calculated separately, and may be understood as an absolute value) is as small as possible.

In some embodiments of the disclosure, in the touch panel, the resistance of the first connection portion is smaller than that of the second connection portion, and the number of the first type touch units in the second channel farther from the terminal area is smaller. In this way, the resistance of the first connection portion is smaller than that of the second connection portion, and the second sub-electrodes in the first type of touch units are connected through the second connection portion, so that if the number of the first type of touch units in the second channel determined by the second sub-electrodes is more, the overall impedance of the second channel is higher. Further, for the second channel farther from the terminal area, the longer the length of the corresponding connected second signal line, the larger the voltage drop generated on the second signal line. If the number of the first-type touch units of the second channels which are farther from the terminal area is smaller, the sum of the impedance of each second channel and the impedance of the corresponding signal line is approximately equal, and a signal with the same parameter (such as voltage) is directly applied to each channel through the signal line.

For example, as shown in fig. 3 to 6 and 8, the resistance of the first connection portion 210 is smaller than the resistance of the second connection portion 220, that is, the sum of the impedances of the second sub-electrodes 121 and 122 and the first connection portion 210 in the first type touch unit a is smaller than the sum of the impedances of the second sub-electrodes 121 and 122 and the second connection portion 220 in the second type touch unit B, so that the larger the number of the second type touch units B (the smaller the number of the first type touch units a) is for the second channels N1 to N7, the larger the impedance of the second channels N1 to N7 is. As shown in fig. 8, for the second channels N1 to N7, the second channels N1 to N7 are arranged close to the terminal area 13 in order, that is, the distance from the second channel N1 to the terminal area 13 is greater than the distance from the second channel N7 to the terminal area 13. As shown in fig. 8, the number of the first type touch units a in the second channels N1 to N7 can be sequentially increased (corresponding to the number of the second type touch units B being sequentially decreased), so that the impedances of the second channels N1 to N7 can be designed to be sequentially increased, that is, the impedances of the second channels farther from the terminal area 13 are smaller. In this way, the second channel having a larger impedance and the second signal line having a smaller impedance are matched, that is, the second channels N1 to N7, but the length (equivalent to the impedance) of the second signal line 320 connected to the second channels N1 to N7 is longer, thereby alleviating the problem of an excessively large impedance difference when a signal is applied (or received) to each of the second channels.

In some embodiments of the disclosure, the resistance of the first connection portion is greater than that of the second connection portion, and the number of the first type touch units in the second channel farther from the terminal area is greater. In this way, the resistance of the first connection portion is greater than that of the second connection portion, and the second sub-electrodes in the first type of touch units are connected through the second connection portion, so that if the number of the first type of touch units in the second channel determined by the second sub-electrodes is more, the overall impedance of the second channel is smaller. Further, for the second channel farther from the terminal area, the longer the length of the corresponding connected second signal line, the larger the voltage drop generated on the second signal line. If the number of the first-type touch units of the second channels which are farther from the terminal area is larger, the sum of the impedance of each second channel and the impedance of the corresponding signal line is approximately equal, and a signal with the same parameter (such as voltage) is directly applied to each channel through the signal line. For the description of the principles in these embodiments, reference may be made to the description in the embodiment shown in fig. 8, which is not repeated herein. For example, the structure of the touch panel shown in fig. 8 may be modified to obtain the touch panel in the embodiments, for example, the terminal area 13 in fig. 8 is moved to the other end of the first channels M1 to M8, and the arrangement of the first signal line 310 and the second signal line 320 is adjusted accordingly.

In the embodiment of the disclosure, when the number of the first type touch units included in the second channel is regulated according to the distance from the second channel to the terminal area, the arrangement relationship between the first type touch units and the first type touch units in each second channel is not limited, and the second type touch units and the first type touch units can be designed according to actual needs. This arrangement is illustrated by several specific examples.

For example, in some embodiments of the present disclosure, as shown in fig. 8, in each second channel, the first type touch units a are arranged adjacently, and the second type touch units B are arranged adjacently.

For example, in other embodiments of the present disclosure, as shown in fig. 9, some of the first type touch units a and some of the second type touch units B in the first channels and the second channels may be arranged to be alternately arranged without changing the first type touch units a and the second type touch units B in each of the second channels.

In some embodiments of the disclosure, the second connection portions need to be selectively connected to the first sub-electrodes or the second sub-electrodes in different types of touch units, that is, on the entire touch panel, the extending directions of some of the second connection portions need to be parallel to the extending direction of the first electrodes, and the extending directions of other second connection portions need to be parallel to the extending direction of the second electrodes, that is, the extending directions of the second connection portions are not uniform, which increases the design difficulty of the second connection portions and the difficulty of the manufacturing process, resulting in an increase in the cost of the touch panel.

In the touch panel provided in at least one embodiment of the present disclosure, the extending directions of the second connecting portions in the first type touch unit and the second type touch unit are substantially parallel. For example, further, the extending direction of the second connection portion is substantially parallel to the extending direction of the first electrode. Therefore, the extending directions of the bridging structures in the whole touch panel are basically the same, and when the arrangement of the second connecting parts is designed in the whole touch functional area, only the specific positions of the second connecting parts need to be considered, but the extending directions of the second connecting parts do not need to be considered, so that the design of the second connecting parts is simplified; in addition, in the process of forming the second connecting part, the similarity of all patterns of the mask plate is high, and the design difficulty of the patterns of the mask plate is simplified, so that the manufacturing process is simplified, and the cost is reduced. For example, in an embodiment of the present disclosure, the process of forming the second connection portion may be a photolithography patterning process in which the above-described mask plate is used.

For example, in the touch panel provided in some embodiments of the present disclosure, in the case where the extending direction of the second connection portion is substantially parallel to the extending direction of the first electrode, in the first type of touch unit, the first connection portion is in a straight shape, and the extending direction of the first connection portion intersects with both the extending directions of the first electrode and the second electrode. The first connecting portion is linear, so that the connecting positions of the second sub-electrode and the second connecting portion and the connecting positions of the first sub-electrode and the first extending portion are staggered with each other, the second sub-electrode actually extends into the first sub-electrode, interaction between the first sub-electrode and the second sub-electrode is increased, and the sensitivity of the touch unit is improved; in addition, the design does not compress the design area of the second sub-electrode, but the second sub-electrode extends to the first sub-electrode on the basis of the original design area, so that a touch capacitor formed by the touch unit has larger capacitance, and the touch effect is improved.

For example, as shown in fig. 10, in the first type touch unit a, the extending direction of the first straight connecting portion 210a intersects with the extending direction of the first electrode 110a, that is, the connecting line between the connecting position of the first connecting portion 210a and the first sub-electrode 111a and the connecting position of the first connecting portion 210a and the first sub-electrode 112a intersects with the extending direction of the first electrode 110a, so that the second sub-electrodes 121a and 122a of the second electrode 120a extend further toward the first sub-electrodes 111a and 112a of the first electrode 110a when arranged along the first connecting portion 210a, thereby increasing the boundaries between the first sub-electrodes 111a and 112a and the second sub-electrodes 121a and 122a, that is, increasing the interaction between the first sub-electrodes 111a and 112a and the second sub-electrodes 121a and 122a, and thus improving the sensitivity of the touch unit. In addition, the second connection part 220a may be connected to a portion of the second sub-electrode 121a, 122a that extends further toward the first sub-electrode 111a, 112a of the first electrode 110a, so that a line connecting the connection positions of the second connection part 220a and the second sub-electrode 121a, 122a may be substantially parallel to the extending direction of the first electrode 110 a. In the second type of touch unit B, referring back to fig. 5, the connection portion 220 is used to connect the sub-electrodes of the first electrode, so as to be parallel to the extending direction of the first electrode. In this way, in the entire touch panel, the extending directions of all the second connecting portions may be substantially parallel.

In some embodiments of the disclosure, in the touch panel, when the extending direction of the second connecting portion is substantially parallel to the extending direction of the first electrode, in the first type of touch unit, the first connecting portion includes a main portion and extending portions located at two ends of the main portion, the extending direction of the main portion is substantially parallel to the extending direction of the second electrode, and the extending portions are connected to the second sub-electrodes. The first connecting portion is provided with a main body portion and an extending portion, and the connecting positions of the second sub-electrode and the second connecting portion and the connecting positions of the first sub-electrode and the first extending portion are staggered with each other, so that the second sub-electrode actually extends into the first sub-electrode, interaction between the first sub-electrode and the second sub-electrode is increased, and the sensitivity of the touch unit is improved. The overlapping parts of the second connecting parts and the first connecting parts are few, so that the capacitance of the capacitor generated between the first connecting parts and the second connecting parts is reduced, the electric field is favorably distributed on the first sub-electrode and the second sub-electrode, and the sensitivity of the touch panel is improved.

For example, as shown in fig. 11, in the first type touch unit B, the first connection portion 210B includes a main body portion 211B and extension portions 212B and 213B located at two ends of the main body portion, the extension portion 212B is connected to the first sub-electrode 111B, the extension portion 213B is connected to the first sub-electrode 112B, and the extension directions of the main body portion 211B and the second electrode 120B are parallel. Thus, a bending region is formed between the main body portion 211b and the extension portions 212b, 213b, and the second sub-electrodes 121b, 122b of the second electrode 120b extend further toward the first sub-electrodes 111b, 112b of the first electrode 110b to enter the bending region when being arranged along the first connection portion 210b, so that the boundaries between the first sub-electrodes 111b, 112b and the second sub-electrodes 121b, 122b are increased, that is, the interaction between the first sub-electrodes 111b, 112b and the second sub-electrodes 121b, 122b is increased, thereby improving the sensitivity of the touch unit. In addition, both ends of the second connection portion 220b may be disposed in the above-mentioned bent region so as to be connected to the portions of the second sub-electrodes 121b and 122b extending into the bent region, so that a connection line between the connection positions of the second connection portion 220b and the second sub-electrodes 121b and 122b may be substantially parallel to the extending direction of the first electrode 110 b. In the second type of touch unit B, referring back to fig. 5, the connection portion 220 is used to connect the sub-electrodes of the first electrode, so as to be parallel to the extending direction of the first electrode. In this way, in the entire touch panel, the extending directions of all the second connecting portions may be substantially parallel.

It should be noted that, in the embodiments of the present disclosure, the definition of the second connection portion is only used to indicate the structure of the first sub-electrode connected to the first electrode or the second sub-electrode connected to the second electrode, and is described as a whole. In practical applications, each second connection portion may be provided as a separate bridging structure, or alternatively, may be provided as at least two parallel bridging structures.

The touch panel provided by at least one embodiment of the present disclosure may further include an insulating layer, where the insulating layer is located between the layer where the first connection portion is located and the layer where the second connection portion is located. In the touch function region, the insulating layer may be spaced apart from the second connection portion and the first connection portion, and thus, the insulating layer may be disposed to cover the touch function region, or may be disposed to cover a position where the first electrode and the second electrode intersect, for example, the insulating layer is disposed to cover the first connection portion.

For example, some of the touch panels provided by the present disclosure include an insulating layer covering the electrode layer and the first connection portion, the insulating layer having a through hole formed therein, and the second connection portion connected to the first connection portion and the second connection portion through the through hole. Therefore, the insulating layer is a continuous whole-layer structure, the flatness of the touch electrode or the second connecting part can be improved, and the performance of the touch panel is improved.

For example, referring back to fig. 7, the insulating layer 400 is located between the layer where the touch electrodes (the first electrode 110 and the second electrode 120) are located and the layer where the second connection portion 220 is located, the insulating layer 400 covers the first electrode 110, the second electrode 120 and the first connection portion 210, a through hole is formed in the insulating layer 400, and the second connection portion 220 is connected to the first electrode 110 or the second electrode 120 through the through hole.

For example, in some embodiments of the present disclosure, the insulating layer includes a plurality of insulating blocks at intersections of the first electrodes and the second electrodes to space the first connection portions and the second connection portions. In this way, in the process of forming the touch electrode or the second connecting part, holes do not need to be punched in the insulating layer, and the second insulating part can be naturally connected with the first sub-electrode in the first electrode or the second sub-electrode in the second electrode, so that the manufacturing process of the touch panel is simplified. In addition, under the condition that the insulating layer is provided with the insulating blocks, when the touch panel is bent, stress generated in the insulating layer is small, so that the bending capability of the touch panel is improved, and the touch panel is favorably applied to a flexible field (such as a flexible display field).

For example, as shown in fig. 12 and 13, the insulating layer 400c includes a plurality of insulating blocks 410c, the insulating blocks 410c are located between the layer where the touch electrodes (the first electrode 110c and the second electrode 120 c) are located and the layer where the second connection portion 220c is located, and the insulating blocks 410c do not completely cover the first sub-electrodes 111c and 112c of the first electrode 110c and the second sub-electrodes 121c and 122c of the second electrode 120c, so that the second connection portion 220c is naturally connected to the first electrode 110c or the second electrode 120c when the second connection portion 220c is formed.

In the embodiment of the present disclosure, the stacking direction of the touch electrode, the layer where the first connection portion is located, and the layer where the second connection portion is located may be designed according to the needs of an actual process, which is not limited herein. For example, the touch panel includes a touch side and a non-touch side deviating from the touch side, and the touch electrode, the layer where the first connection portion is located, and the layer where the second connection portion is located are sequentially disposed from the non-touch side to the touch side, or the layer where the second connection portion is located, the touch electrode, and the layer where the first connection portion is located are sequentially disposed.

For example, in some embodiments of the present disclosure, as shown in fig. 7, the touch panel includes a substrate 500, and touch electrodes (only the second electrodes 120 included therein are shown), a first connection portion 210, an insulation layer 400, and a second connection portion 220, which are disposed on the substrate 500. The touch electrode and the first connection portion 210 are located between the insulating layer 400 and the substrate 500, and the insulating layer 400 is located between the touch electrode and the first connection portion 210 and the second connection portion 220. In these embodiments, the touch electrode may have a higher flatness, and the insulating layer 400 is formed on the touch electrode, so that the requirement on the thickness of the insulating layer 400 is small, that is, the requirement on the flatness of the insulating layer 400 is reduced, which is beneficial to the light and thin design of the touch panel; in addition, the insulating layer 400 generates less stress when being bent, which is beneficial to improving the bending capability of the touch panel, so that the touch panel is beneficial to being applied to a flexible field (for example, a flexible display field).

For example, in an actual process, as shown in fig. 7, a conductive material film layer may be deposited on the substrate 500 and then patterned to form the touch electrode and the first connection portion 210; then, depositing an insulating material on the substrate 500 to form an insulating layer 400, the insulating layer 400 covering the touch electrode and the first connection portion 210, and patterning the insulating layer 400 to form a via hole in the insulating layer 400; then, another conductive material film is deposited on the insulating layer 400, and the another conductive material film is connected to the first sub-electrode of the first electrode or the second sub-electrode 121, 122 of the second electrode 120 through the via hole, and after patterning the another conductive material film, a second connection portion 220 is formed as shown in fig. 7, and the second connection portion 220 connects the disconnected first sub-electrode (not shown in fig. 7, see fig. 2) or the second sub-electrode 121, 122.

For example, in some embodiments of the present disclosure, as shown in fig. 14, the touch panel includes a substrate 500d, and touch electrodes (only the second electrodes 120d included therein) disposed on the substrate 500d, a first connection portion 210d, an insulating layer 400d, and a second connection portion 220d. The second connecting portion 220d is located between the insulating layer 400d and the substrate 500d, and the insulating layer 400d is located between the touch electrode and the layer where the first connecting portion 210d is located and the second connecting portion 220d. In the embodiments, for the user's vision, the second connecting portion 220d is located under the touch electrode and the first connecting portion 210d, and the touch electrode and the first connecting portion 210d are formed of the same material, so as to have parameters such as similar light reflection rate, and therefore, the light reflection rate of the entire touch panel is relatively uniform, thereby improving the visual effect of the touch panel.

For example, in an actual process, as shown in fig. 14, a conductive material film layer may be deposited on the substrate 500d and then patterned to form the second connection portion 220d; then, an insulating material is deposited on the substrate 500d to form an insulating layer 400d, the insulating layer 400d covers the second connection portion 220d, and patterning is performed on the insulating layer 400d to form a through hole in the insulating layer 400 d; then, another conductive material film is deposited on the insulating layer 400d, and the another conductive material film is connected to the second connection portion 220d through the via hole, and after patterning the another conductive material film, the touch electrode and the first connection portion 210d as shown in fig. 14 are formed. The second connection portion 220d connects the disconnected first sub-electrodes (not shown in fig. 14, see fig. 2) of the first electrodes included in the touch electrode or the second sub-electrodes 121d and 122d of the second electrode 120 d.

In the embodiment of the present disclosure, the touch electrode, the first connection portion, and the second connection portion may be made of a transparent conductive material such as ITO, or may be made of a metal conductive material such as titanium, aluminum, molybdenum, and copper.

For example, in the case that the touch electrode and the first connection portion are made of transparent conductive material such as ITO, the second connection portion may be made of metal conductive material, so that the electrical conductivity of the second connection portion is higher than that of the touch electrode and the first connection portion, that is, the electrical resistance of the second connection portion is smaller than that of the first connection portion under the same size. Under this condition, the luminousness of second connecting portion is low to can set up the non-touch-control side at touch panel with the second connecting portion, promptly, layer and touch-control electrode at second connecting portion place, first connecting portion place layer set gradually along touch panel's non-touch-control side to touch-control side, so, from the visual effect, most of second connecting portion are sheltered from by touch-control electrode, first connecting portion, thereby reduce the visual visible risk of second connecting portion to a certain extent.

For example, when the touch electrode and the first connection portion are made of a metal conductive material, the second connection portion may also be made of a metal conductive material. In some applications, the thickness of the second connection portion is smaller than the thickness of the first connection portion, resulting in a resistance of the second connection portion being greater than a resistance of the first connection portion. In this case, if the touch panel is used in the display field, the touch electrode, the first connection portion, and the second connection portion may be disposed to have a mesh structure to have a higher light transmittance.

At least one embodiment of the present disclosure provides a touch display device, which includes a display panel and the touch panel in the first aspect, where the touch panel is located on a display side of the display panel.

In the embodiments of the present disclosure, the type of the display panel is not limited, and the display panel may be an Organic Light-Emitting Diode (OLED) display panel (abbreviated as "OLED panel"), a liquid crystal display panel, an electronic paper display panel, or the like.

For example, in the embodiments of the present disclosure, in the case where the display panel is an OLED panel, the OLED panel may serve as a substrate of the touch panel. For example, the display panel includes an Encapsulation layer, and the Touch electrode, the first connection portion, and the second connection portion may be directly prepared on the Encapsulation layer, so that the Touch panel may be a Touch on Encapsulation (TOE on Encapsulation) type Touch panel. The touch functional layer (the conductive bridge, the first electrode and the second electrode) in the TOE touch panel is directly formed on the packaging layer of the display panel, so that compared with an attaching mode, the manufacturing process flow of the whole touch panel is simplified, and the light and thin design of the touch panel is facilitated.

For example, in the touch display device provided in at least one embodiment of the present disclosure, a light splitting element (e.g., a light splitting grating) may be further disposed on the touch side (display side) of the touch panel, so that the touch display device may have a three-dimensional display function.

For example, the touch display device in the embodiments of the present disclosure may be any product or component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.

Claims

1. A touch panel, comprising a touch functional area and a frame area surrounding the touch functional area, wherein the touch panel further comprises:

the touch control electrode is positioned in the touch control functional area and comprises a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes are arranged in parallel, the second electrodes are arranged in parallel, each first electrode determines a first channel, each second electrode determines a second channel, the overlapping area of each first channel and each second channel is the area where the touch control unit is located, each first electrode is disconnected into a plurality of first sub-electrodes from the overlapping area, and each second electrode is disconnected into a plurality of second sub-electrodes from the overlapping area;

the first connecting parts are positioned on the same layer as the touch electrodes and in the overlapping area;

a plurality of second connection portions, which are different in layer from the layer where the first connection portions are located and located in the overlapping region, the first connection portions and the second connection portions having different resistances;

the touch units are divided into a first type touch unit and a second type touch unit, in the first type touch unit, the first sub-electrode is connected with the first connecting part, and the second sub-electrode is connected with the second connecting part; in the second type of touch unit, the first sub-electrode is connected to the second connection portion, the second sub-electrode is connected to the first connection portion, and

each of the first channels and each of the second channels are distributed with the first type touch units and the second type touch units, so that the impedance difference of all the first channels and the second channels can be adjusted by adjusting the distribution number of the first type touch units and the second type touch units in each of the first channels and each of the second channels.

2. The touch panel of claim 1,

the first connecting portion and the first sub-electrode or the second sub-electrode connected correspondingly are integrally formed.

3. The touch panel according to claim 1 or 2,

the same number of first type touch units are arranged in different first channels; and/or

The same number of the first type touch units are arranged in different second channels.

4. The touch panel of claim 3,

in any one of the first channel and the second channel, the first type touch units and the second type touch units are alternately arranged.

5. The touch panel according to claim 1 or 2, wherein the frame area comprises:

a terminal region located at one end of the first electrode in an extending direction of the first electrode;

the plurality of first signal wires are connected with the first electrodes in a one-to-one correspondence mode and are positioned between the terminal areas and the first electrodes; and

a plurality of second signal lines connected to the second electrodes in a one-to-one correspondence;

the resistance of the first connecting part is smaller than that of the second connecting part, and the number of the first type of touch units in the second channel which is farther away from the terminal area is smaller; or

The resistance of the first connecting portion is greater than that of the second connecting portion, and the number of the first type of touch units in the second channel which is farther away from the terminal area is larger.

6. The touch panel according to claim 1 or 2,

the extending directions of the second connecting parts in the first type touch unit and the second type touch unit are parallel.

7. The touch panel according to claim 6, wherein an extending direction of the second connecting portion is parallel to an extending direction of the first electrode.

8. The touch panel according to claim 6, wherein, in the first type of touch unit,

the first connecting part is linear, and the extending direction of the first connecting part is intersected with the extending direction of the first electrode and the second electrode; or

The first connecting portion comprises a main body portion and extending portions located at two ends of the main body portion, the extending direction of the main body portion is parallel to the extending direction of the second electrode, and the extending portions are connected with the second sub-electrodes.

9. The touch panel according to claim 1, further comprising:

the insulating layer is positioned between the layer where the first connecting part is positioned and the layer where the second connecting part is positioned;

the insulating layer covers the touch electrode and the first connecting part, a through hole is formed in the insulating layer, and the second connecting part is connected with the first connecting part and the second connecting part through the through hole; and/or

The insulating layer includes a plurality of insulating blocks at intersections of the first and second electrodes to space the first and second connection parts.

10. A touch display device comprising a display panel and the touch panel according to any one of claims 1 to 9, the touch panel being located on a display side of the display panel.