Touch display panel and touch display device

Abstract

Embodiments of the present application provide a touch display panel and a touch display device, and relate to the technical field of display, and are used for improving the electrostatic reliability of the touch display panel. The touch display panel comprises a first region and a second region, the first region is located on one side of the second region close to the edge of the touch display panel; the first region comprises a first touch unit, and the second region comprises a plurality of second touch units, the plurality of second touch units are arranged in a repeated array along a first direction and a second direction in the second region; the first direction and the second direction intersect; the area of the orthographic projection of the first touch unit on the plane where the touch display panel is located is smaller than the area of the orthographic projection of the second touch unit on the plane where the touch display panel is located; and the absolute value of the difference between the impedance of the first touch unit and the impedance of the second touch unit is smaller than a first preset threshold.

Description

[Technical Field]

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

[0002] With the rapid development of display technology and human-computer interaction technology, touch-screen display panels are being used more and more widely. For example, to achieve portability and compact size, many electronic products, such as mobile phones, have changed their input methods from using traditional keyboards or mice to using touch screens as input devices.

[0003] To integrate touch functionality onto a display panel, touch electrodes need to be incorporated into the panel. Ensuring the electrical reliability of these electrodes, improving their anti-static capabilities, and preventing electrostatic discharge (ESD) damage have become key research priorities for researchers. [Summary of the Invention]

[0004] In view of this, embodiments of the present invention provide a touch display panel and a touch display device to improve the anti-static capability of the touch display panel.

[0005] On one hand, embodiments of the present invention provide a touch display panel, including a first region and a second region, wherein the first region is located on the side of the second region near the edge of the touch display panel;

[0006] The first region includes a first touch unit, and the second region includes a plurality of second touch units, which are arranged in a repeating array within the second region along a first direction and a second direction; the first direction and the second direction intersect.

[0007] The area of ​​the first touch unit projected onto the plane of the touch display panel is smaller than the area of ​​the second touch unit projected onto the plane of the touch display panel; the absolute value of the difference between the impedance of the first touch unit and the impedance of the second touch unit is less than a first preset threshold.

[0008] On the other hand, embodiments of the present invention provide a display device including the touch display panel described above.

[0009] The touch display panel and touch display device provided in this invention, by making the area of ​​the first touch unit smaller than the area of ​​the second touch unit, can be applied to the design of touch display panels with different shape requirements. Furthermore, by making the absolute value of the difference between the impedance of the first touch unit and the impedance of the second touch unit less than a first preset threshold, this invention can make the electrostatic discharge current flowing through the first touch unit and the second touch unit approximately equal, avoiding excessive electrostatic discharge current flowing through the smaller-area first touch unit. This prevents the smaller-area first touch unit from becoming an electrostatic weak point in the touch display panel, thus improving the reliability of the touch display panel. [Attached Image Description]

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of a touch display panel provided in an embodiment of the present invention;

[0012] Figure 2 A schematic diagram of another touch display panel provided in an embodiment of the present invention;

[0013] Figure 3 for Figure 1 An enlarged schematic diagram of the central region Q1;

[0014] Figure 4 for Figure 2 An enlarged schematic diagram of the central region Q2;

[0015] Figure 5 This is a schematic diagram of a first touch unit, a touch sensing line, and a touch driving line provided in an embodiment of the present invention;

[0016] Figure 6 A schematic diagram of another first touch unit provided in an embodiment of the present invention;

[0017] Figure 7 A schematic diagram of yet another first touch unit provided in an embodiment of the present invention;

[0018] Figure 8 A schematic diagram of yet another first touch unit provided in an embodiment of the present invention;

[0019] Figure 9 for Figure 3 A schematic diagram of a cross-section along BB';

[0020] Figure 10 for Figure 3 A schematic diagram of a cross section along CC';

[0021] Figure 11 for Figure 3 Another schematic diagram of a cross section along CC'.

[0022] Figure 12 A schematic diagram of another first touch unit and a second touch unit provided in an embodiment of the present invention;

[0023] Figure 13 for Figure 12 A schematic diagram of a cross-section along DD';

[0024] Figure 14 A schematic diagram of another first touch unit and a second touch unit provided in an embodiment of the present invention;

[0025] Figure 15 for Figure 14 A schematic diagram of a cross-section along EE';

[0026] Figure 16 A cross-sectional schematic diagram of another touch display panel provided in an embodiment of the present invention;

[0027] Figure 17 This is a schematic diagram of a touch display device provided in an embodiment of the present invention.

Detailed Implementation Methods

[0028] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0032] This invention provides a touch display panel, such as... Figure 1 and Figure 2 As shown, Figure 1 and Figure 2 This is a schematic diagram of two types of touch display panels 100 provided in the embodiments of the present invention. The touch display panel 100 includes a first region A1 and a second region A2. The first region A1 is located on the side of the second region A2 near the edge E of the touch display panel 100.

[0033] like Figure 3 and Figure 4 As shown, Figure 3 for Figure 1 An enlarged schematic diagram of region Q1 in the middle area. Figure 4 for Figure 2 An enlarged schematic diagram of region Q2 shows a first region A1 including a first touch unit 1. A second region A2 includes multiple second touch units 2, which are arranged in a repeating array along a first direction h1 and a second direction h2 within the second region A2 to cover the entire region A2. That is, the second touch unit 2 is the smallest repeating unit in the second region A2. The first direction h1 and the second direction h2 intersect.

[0034] like Figure 3 and Figure 4 As shown, in this embodiment of the invention, the area of ​​the orthographic projection of the first touch unit 1 onto the plane of the touch display panel 100 is smaller than the area of ​​the orthographic projection of the second touch unit 2 onto the plane of the touch display panel 100. For example, the first touch unit 1 can be considered as a structure obtained by cutting away a portion of the second touch unit 2. For example, along the first direction h1, the length of the first touch unit 1 is smaller than the length of the second touch unit 2; and / or, along the second direction h2, the length of the first touch unit 1 is smaller than the length of the second touch unit 2.

[0035] In this embodiment of the invention, the absolute value of the difference between the impedance R1 of the first touch unit 1 and the impedance R2 of the second touch unit 2 is less than a first preset threshold A.

[0036] The touch display panel 100 provided in this embodiment of the invention can be applied to the design of touch display panels 100 with different shape requirements by making the area of ​​the first touch unit 1 smaller than the area of ​​the second touch unit 2.

[0037] Optionally, in embodiments of the present invention, the touch display panel 100 can be designed with an irregular, non-standard shape to increase the screen-to-body ratio. The screen-to-body ratio is the proportion of the display area of ​​the touch display panel 100 to the total front area of ​​the display screen. For example... Figure 1As shown, in this embodiment of the invention, the touch display panel 100 can be designed as a rounded rectangle with rounded corners. Alternatively, as... Figure 2 As shown, in this embodiment of the invention, the touch display panel 100 can be designed to be circular. For example... Figure 1 and Figure 2 As shown, the edge E of the touch display panel 100 includes an irregularly shaped edge E1 with a non-linear shape. The first region A1 can be located on the side of the second region A2 near the irregularly shaped edge E1 of the touch display panel 100. The edge of the first touch unit 1 can extend along the extending direction of the irregularly shaped edge E1 of the touch display panel 100. When the shape of the touch display panel 100 is designed as a rounded rectangle, such as... Figure 1 As shown, the first area A1 is located at the four corners of the touch display panel 100. When the touch display panel 100 is designed to be circular, as... Figure 2 As shown, the first region A1 surrounds the second region A2.

[0038] Static electricity is unavoidable during the manufacturing, transportation, and use of the touch display panel 100. Excessive accumulation of static charge in the touch display panel 100 can lead to electrostatic discharge (ESD). In related technologies, the instantaneous high current generated during ESD poses a risk of injury to the touch display panel 100. When the area of ​​the orthographic projection of the first touch unit 1 onto the plane of the touch display panel 100 is smaller than the area of ​​the orthographic projection of the second touch unit 2 onto the plane of the touch display panel 100, so that the shape requirements of the first touch unit 1 and the touch display panel 100 are matched, the embodiment of the present invention makes the absolute value of the difference between the impedance R1 of the first touch unit 1 and the impedance R2 of the second touch unit 2 less than a first preset threshold A. This makes the electrostatic discharge current flowing through the first touch unit 1 and the second touch unit 2 approximately equal, avoiding the excessive electrostatic discharge current flowing through the first touch unit 1 with a smaller area. This prevents the first touch unit 1 with a smaller area from becoming an electrostatic weak point in the touch display panel 100, which is beneficial to improving the reliability of the touch display panel 100.

[0039] For example, the first preset threshold A is less than or equal to 5% × R2.

[0040] Optionally, the touch display panel 100 provided in this embodiment of the invention may employ self-capacitive touch technology. Alternatively, mutual-capacitive touch technology may also be used.

[0041] When the touch display panel 100 employs mutual capacitance touch technology, for example, such as Figure 3 and Figure 4As shown, the first touch unit 1 includes two first sensing electrodes 11 arranged along the first direction h1 and two first driving electrodes 12 arranged along the second direction h2; along the second direction h2, the two first sensing electrodes 11 are located between two adjacent first driving electrodes 12; along the first direction h1, the two first driving electrodes 12 are located between two adjacent first sensing electrodes 11.

[0042] The second touch unit 2 includes two second sensing electrodes 21 arranged along a first direction h1 and two second driving electrodes 22 arranged along a second direction h2; along the first direction h1, the two second sensing electrodes 21 are located between two adjacent second driving electrodes 22; along the second direction h2, the two second driving electrodes 22 are located between two adjacent second sensing electrodes 21.

[0043] For example, such as Figure 3 and Figure 4 As shown, the first touch unit 1 further includes a first connecting portion 131 and a second connecting portion 132. The first connecting portion 131 is electrically connected to two adjacent first sensing electrodes 11, and the second connecting portion 132 is electrically connected to two adjacent first driving electrodes 12. The first connecting portion 131 and the second connecting portion 132 are insulated from each other and cross each other. That is, along the direction perpendicular to the plane of the touch display panel 100, the first connecting portion 131 and the second connecting portion 132 at least partially overlap.

[0044] The second touch unit 2 further includes a third connecting portion 231 and a fourth connecting portion 232. The third connecting portion 231 is electrically connected to two adjacent second sensing electrodes 21, and the fourth connecting portion 232 is electrically connected to two adjacent second driving electrodes 22. The third connecting portion 231 and the fourth connecting portion 232 are insulated from each other. That is, along the direction perpendicular to the plane of the touch display panel 100, the third connecting portion 231 and the fourth connecting portion 232 at least partially overlap.

[0045] For example, such as Figure 3 and Figure 4 As shown, for the first touch unit 1 and the second touch unit 2 arranged along the first direction h1, the first sensing electrode 11 of the first touch unit 1 and the second sensing electrode 21 of the second touch unit 2 are electrically connected. For the first touch unit 1 and the second touch unit 2 arranged along the second direction h2, the first driving electrode 12 of the first touch unit 1 and the second driving electrode 22 of the second touch unit 2 are electrically connected.

[0046] For example, such as Figure 3As shown, the touch display panel 100 also includes multiple touch sensing lines 31 and multiple touch driving lines 32. Optionally, the first driving electrode 12 and the second driving electrode 22, arranged along the second direction h2, are electrically connected to the same touch driving line 32. The first sensing electrode 11 and the second sensing electrode 21, arranged along the first direction h1, are electrically connected to the same touch sensing line 31. The touch sensing lines 31 and the touch driving lines 32 are electrically connected to a touch chip (not shown).

[0047] When the touch display panel 100 is used for touch operation, the first driving electrode 12 and the second driving electrode 22 receive touch driving signals provided by the touch chip through the touch driving line 32. Mutual capacitance can be formed between the first driving electrode 12 and the first sensing electrode 11, and between the second driving electrode 22 and the second sensing electrode 21. When an object such as a finger touches the first area A1, the capacitance between the first driving electrode 12 and the first sensing electrode 11 changes. When an object such as a finger touches the second area A2, the capacitance between the second driving electrode 22 and the second sensing electrode 21 changes. The first sensing electrode 11 and the second sensing electrode 21 transmit touch sensing signals to the touch chip through the touch sensing line 31. By analyzing the touch sensing signals, the touch chip can determine whether the touch display panel has been touched and identify the touch position.

[0048] For example, such as Figure 3 As shown, some of the touch sensing lines 31 are electrically connected to the first sensing electrode 11 located near the edge E of the touch display panel 100, and some of the touch driving lines 32 are electrically connected to the first driving electrode 12 located near the edge E of the touch display panel 100.

[0049] For example, such as Figure 3 As shown, the edges of the first sensing electrode 11, the second sensing electrode 21, the first driving electrode 12, and the second driving electrode 22 include straight lines. Alternatively, as... Figure 4 As shown, in this embodiment of the invention, the edges of the first sensing electrode 11, the second sensing electrode 21, the first driving electrode 12, and the second driving electrode 22 can also be set as broken lines, and this embodiment of the invention does not limit this.

[0050] For example, the area of ​​the orthographic projection of the first touch unit 1 onto the plane of the touch display panel 100 is smaller than the area of ​​the orthographic projection of the second touch unit 2 onto the plane of the touch display panel 100, including:

[0051] The area of ​​the orthographic projection of at least one first sensing electrode 11 onto the plane of the touch display panel 100 is smaller than the area of ​​the orthographic projection of the second sensing electrode 21 onto the plane of the touch display panel 100, and / or, the area of ​​the orthographic projection of at least one first driving electrode 12 onto the plane of the touch display panel 100 is smaller than the area of ​​the orthographic projection of the second driving electrode 22 onto the plane of the touch display panel 100.

[0052] Figure 3 and Figure 4 The following is an illustration: the two second driving electrodes 22 in the second touch unit 2 have the same area, the two second sensing electrodes 21 have the same area, and in the first touch unit 1, one of the first sensing electrodes 11 has the same area as the second sensing electrode 21, while the other first sensing electrode 11 has a smaller area than the second sensing electrode 21; one of the first driving electrodes 12 has the same area as the second driving electrode 22, while the other first driving electrode 12 has a smaller area than the second driving electrode 22.

[0053] like Figure 3 and Figure 4 As shown, the second sensing electrode 21 and the second driving electrode 22 are approximately triangular in shape. The first sensing electrode 11 and the first driving electrode 12 in the first touch unit 1 are also approximately triangular in shape. The shape of the other first sensing electrode 11 is the shape obtained by removing part of the triangle, and the shape of the other first driving electrode 12 is the shape obtained by removing part of the triangle.

[0054] For example, the absolute value of the difference between the impedance of the first touch unit 1 and the impedance of the second touch unit 2 is less than a first preset threshold, including: the absolute value of the difference between the impedance of the first sensing electrode 11 and the impedance of the second sensing electrode 21 is less than the first preset threshold, and / or, the absolute value of the difference between the impedance of the first driving electrode 12 and the impedance of the second driving electrode 22 is less than the first preset threshold.

[0055] As mentioned earlier, static charge accumulation is unavoidable during the use or production of the touch display panel 100. Excessive static charge accumulation can lead to electrostatic discharge, and the instantaneous high current can damage the touch display panel. During their research, the inventors discovered that for the mutual capacitance touch display panel 100, the first connecting portion 131 and the second connecting portion 132 form an insulated, overlapping parallel-plate capacitor structure. When electrostatic discharge causes a large voltage difference between the first connecting portion 131 and the second connecting portion 132, the locations of the first connecting portion 131 and the second connecting portion 132 are easily electrostatically broken down, leading to touch failure. This embodiment of the invention increases the impedance of the first sensing electrode 11 and / or the first driving electrode 12, which have a smaller area, so that the absolute value of the difference between the impedance of the first sensing electrode 11 and the impedance of the second sensing electrode 21 is less than a first preset threshold, and / or, so that the absolute value of the difference between the impedance of the first driving electrode 12 and the impedance of the second driving electrode 22 is less than the first preset threshold. This reduces the risk of generating excessive electrostatic discharge current in the first sensing electrode 11 or the first driving electrode 12, that is, it reduces the risk of generating excessive electrostatic discharge current in the first connection portion 131 or the second connection portion 132. This reduces the voltage difference between the first connection portion 131 and the second connection portion 132 during electrostatic discharge, and prevents the parallel plate capacitor formed by the first connection portion 131 and the second connection portion 132 from being electrostatically broken down, which is beneficial to improving the electrostatic reliability of the touch display panel 100.

[0056] For example, in embodiments of the present invention, a hole may be provided in the first sensing electrode 11 and / or the first driving electrode 12. For example, in the two first sensing electrodes 11 and two first driving electrodes 12 included in the first touch unit 1, embodiments of the present invention may provide a hole in the first sensing electrode 11 and / or the first driving electrode 12 with a smaller area to increase the impedance of the first sensing electrode 11 and / or the first driving electrode 12 with a smaller area, so that the absolute value of the difference between the impedance of the first sensing electrode 11 and the impedance of the second sensing electrode 21 is less than a first preset threshold, and / or, so that the absolute value of the difference between the impedance of the first driving electrode 12 and the impedance of the second driving electrode 22 is less than the first preset threshold.

[0057] For example, such as Figure 5 As shown, Figure 5This is a schematic diagram of a first touch unit, a touch sensing line, and a touch driving line provided in an embodiment of the present invention. The area of ​​one first driving electrode 12 is set to be equal to the area of ​​a second driving electrode, and the area of ​​the other first driving electrode 12 is set to be smaller than the area of ​​the second driving electrode. The area of ​​one first sensing electrode 11 is set to be equal to the area of ​​the second sensing electrode, and the area of ​​the other first sensing electrode 11 is set to be equal to the area of ​​the second sensing electrode. Holes K are formed in both the first driving electrode 12 and the first sensing electrode 11 with the smaller area, as illustrated.

[0058] like Figure 5 As shown, the first sensing electrode 11 is electrically connected to the touch sensing line 31, and the first driving electrode 12 is electrically connected to the touch driving line 32. It can be understood that the first sensing electrode 11 can be considered as a collection of multiple charge transport channels connected in parallel between the first connecting portion 131 and the touch sensing line 31, and the first driving electrode 12 can be considered as a collection of multiple charge transport channels connected in parallel between the second connecting portion 132 and the touch driving line 32. Figure 5 As shown, the lengths of the first sensing electrode 11, which has a smaller area, in both the first direction h1 and the second direction h2 are shorter than the lengths of the second sensing electrode in the corresponding directions. Similarly, the lengths of the first driving electrode 12, which also has a smaller area, in both the first direction h1 and the second direction h2 are shorter than the lengths of the second driving electrode in the corresponding directions. Therefore, this results in shorter lengths of some charge transport channels in the first sensing electrode 11 and the first driving electrode 12, which both have smaller areas. In this embodiment of the invention, by removing a portion of the first sensing electrode 11 and / or the first driving electrode 12 to form a hole K in the first sensing electrode 11 and / or the first driving electrode 12, the number of charge transport channels in the first sensing electrode 11 and / or the first driving electrode 12 with a smaller area can be reduced. This is equivalent to reducing the number of parallel branches in the first sensing electrode 11 and / or the first driving electrode 12 with a smaller area, thereby increasing the resistance of the first sensing electrode 11 and / or the first driving electrode 12. This compensates for the problem of low impedance caused by the short length of the charge transport channels. The absolute value of the difference between the impedance of the first sensing electrode 11 with a smaller area and the impedance of the second sensing electrode 21 can be less than a first preset threshold, and / or the absolute value of the difference between the impedance of the first driving electrode 12 with a smaller area and the impedance of the second driving electrode 22 can be less than the first preset threshold.

[0059] When a hole K is formed in the first sensing electrode 11, which has a small area, for example, such as Figure 5 As shown, the edge E of the first sensing electrode 11 11The shortest distance between the hole K and the first sensing electrode 11 is d1; the width of the first connecting part 131 is d2, and the width direction of the first connecting part 131 is perpendicular to the arrangement direction of the two adjacent first sensing electrodes 11; d1 > d2. By setting d1 > d2, this embodiment of the invention ensures that the edges E of the hole K and the first sensing electrode 11 are aligned. 11 The distance between them will not be too small, thus avoiding the intersection of the hole K and the edge E of the first sensing electrode 11. 11 New electrostatic weak points are formed between them.

[0060] When a hole K is formed in the first driving electrode 12, which has a small area, for example, such as Figure 5 As shown, the edge E of the first driving electrode 12 12 The shortest distance between the hole K and the first connecting part 131 is d3; the width of the second connecting part 132 is d4, and the width direction of the first connecting part 131 is perpendicular to the arrangement direction of the two adjacent first sensing electrodes 11; d3 > d4. By setting d3 > d4, this embodiment of the invention ensures that the edge E of the hole K and the first driving electrode 12 is aligned. 12 The distance between them will not be too small, thus avoiding the intersection of the hole K and the edge E of the first driving electrode 12. 12 New electrostatic weak points are formed between them.

[0061] For example, such as Figure 3 and Figure 5 As shown, the widths of the first connecting portion 131 and the second connecting portion 132 can be equal at different positions. Alternatively, in this embodiment of the invention, the widths of the first connecting portion 131 and the second connecting portion 132 at different positions can be set to be different. When the widths of the first connecting portion 131 and the second connecting portion 132 at different positions are different, the width d2 of the first connecting portion 131 is the minimum width of the first connecting portion 131. The width d4 of the second connecting portion 132 is the minimum width of the second connecting portion 132.

[0062] For example, in embodiments of the present invention, at least two holes K may be formed in the first sensing electrode 11 and / or the first driving electrode 12 having a smaller area, so as to increase the adjustable range of the impedance of the first sensing electrode 11 or the first driving electrode 12.

[0063] For example, such as Figure 6 As shown, Figure 6This is a schematic diagram of another first touch unit 1 provided in an embodiment of the present invention. In the first sensing electrode 11, two adjacent holes K overlap at least partially in the first direction h1. With this arrangement, when the static charge moves in the first sensing electrode 11, the direction of movement of the static charge will be adjusted multiple times when passing through at least two holes K, thereby extending the movement path of the static charge in the first sensing electrode 11. This is beneficial to further increase the resistance of the first sensing electrode 11 and allows for fine adjustment of the impedance of the first sensing electrode 11. Figure 6 The path S11 represents the movement path of the static charge as it passes through the two holes K in the first sensing electrode 11. Furthermore, by setting two adjacent holes K in the first sensing electrode 11 to partially overlap along the first direction h1, this embodiment of the invention allows the holes K to be more evenly distributed in the first sensing electrode 11, which is beneficial for improving the display consistency of the touch display panel 100 at different locations.

[0064] For example, such as Figure 6 As shown, in the first driving electrode 12, two adjacent holes K overlap at least partially in the second direction h2. With this arrangement, when the static charge moves in the first driving electrode 12, its direction of movement will be adjusted multiple times when passing through at least two holes K. This can lengthen the movement path of the static charge in the first driving electrode 12, which is beneficial to further increase the resistance of the first driving electrode 12 and allows for fine adjustment of its impedance. Figure 6 The path S12 represents the movement path of the static charge as it passes through the two holes K in the first driving electrode 12. Furthermore, by setting two adjacent holes K in the first driving electrode 12 to partially overlap along the first direction h1, this embodiment of the invention allows the holes K to be more evenly distributed in the first driving electrode 12, which is beneficial for improving the display consistency of the touch display panel 100 at different locations.

[0065] When the first sensing electrode 11 includes a plurality of holes K, for example, such as Figure 7 As shown, Figure 7 This is a schematic diagram of another first touch unit 1 provided in an embodiment of the present invention. The first sensing electrode 11 includes a first sub-region A11 and a second sub-region A12, with the second sub-region A12 located on the side of the first sub-region A11 away from the first connecting portion 131. The density of the cutouts K in the first sub-region A11 is less than the density of the cutouts K in the second sub-region A12. This arrangement minimizes the density of the cutouts K at the location of the first connecting portion 131, making the environment around the first connecting portion 131 more consistent with the environment around the third connecting portion 231 in the second touch unit 2, which is beneficial for improving the touch uniformity at different locations in the touch display panel 100.

[0066] When the first driving electrode 12 includes a plurality of holes K, for example, such as Figure 7 As shown, the first driving electrode 12 includes a third sub-region A13 and a fourth sub-region A14, with the fourth sub-region A14 located on the side of the third sub-region A13 away from the second connecting portion 132. The density of the holes K in the third sub-region A13 is less than the density of the holes K in the fourth sub-region A14. This arrangement minimizes the density of the holes K at the location of the second connecting portion 132, making the environment around the second connecting portion 132 more consistent with the environment around the fourth connecting portion 232 in the second touch unit 2, which is beneficial for improving the touch uniformity at different locations in the touch display panel 100.

[0067] When setting the hole K, for example, such as Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment of the invention, the aforementioned cutout K can be formed inside the first sensing electrode 11 and / or the first driving electrode 12. That is, the cutout K formed in the first sensing electrode 11 is surrounded by the edge of the first sensing electrode 11, and the cutout K formed in the first driving electrode 12 is surrounded by the edge of the first driving electrode 12. This arrangement avoids the formation of pointed structures separated by the cutout K at the edges of the first sensing electrode 11 and / or the first driving electrode 12, thereby reducing the possibility of tip discharge at the edges of the first sensing electrode 11 and / or the first driving electrode 12, and further improving the reliability of the touch display panel.

[0068] For example, the shape of the cutout K may be circular or polygonal. Figure 5 , Figure 6 and Figure 7 The example illustrates this by setting the cutout K to a quadrilateral shape.

[0069] Optional, such as Figure 8 As shown, Figure 8 This is a schematic diagram of another first touch unit 1 provided in an embodiment of the present invention. In the first sensing electrode 11, a hole K extends from the edge of the first sensing electrode 11 into the interior of the first sensing electrode 11 to form a slit. The slit can increase the impedance of the first sensing electrode 11. For example, the length of the slit is greater than the width of the slit. The width of the slit is perpendicular to the extension direction of the slit.

[0070] For example, the shape of the slit can be any of a straight line, a broken line, or an arc. Figure 8 The slit is illustrated by setting its shape to a straight line.

[0071] For example, such as Figure 8 As shown, the first sensing electrode 11 includes a first edge E disposed opposite to the first edge along the second direction h2. a Second edge Eb When multiple slits are provided in the first sensing electrode 11, the slits include a first slit X1 and a second slit X2, the first slit X1 extending from the first edge E a The first sensing electrode 11 extends into the interior; the second slit X2 extends from the second edge E. b The first slit X1 and the second slit X2 extend into the first sensing electrode 11, and at least partially overlap in the first direction h1, so as to finely adjust the impedance of the first sensing electrode 11 and make the distribution of the first slit X1 and the second slit X2 in the first sensing electrode 11 more uniform, so as to improve the display uniformity of the touch display panel.

[0072] For example, such as Figure 8 As shown, the first driving electrode 12 includes a third edge E disposed along the first direction h1. c and the fourth edge E d When multiple slits X are provided in the first driving electrode 12, the slits X include a third slit X3 and a fourth slit X4, the third slit X3 extending from the third edge E c It extends toward the interior of the first driving electrode 12; the fourth slit X4 extends from the fourth edge E d The first drive electrode 12 extends into the interior of the first drive electrode 12, and the third slit X3 and the fourth slit X4 overlap at least partially in the second direction h2, so as to finely adjust the impedance of the first drive electrode 12 and make the distribution of the third slit X3 and the fourth slit X4 in the first drive electrode 12 more uniform, so as to improve the display uniformity of the touch display panel.

[0073] Optionally, in embodiments of the present invention, the first sensing electrode 11 and the second sensing electrode 21 may be disposed on the same layer, so that the first sensing electrode 11 and the second sensing electrode 21 are formed by the same patterning process, thereby simplifying the manufacturing process of the touch display panel 100.

[0074] For example, in embodiments of the present invention, the first sensing electrode 11, the second sensing electrode 21, the first driving electrode 12, and the second driving electrode 22 can all be disposed in the same layer.

[0075] like Figure 9 and Figure 10 As shown, Figure 9 for Figure 3 A schematic diagram of a cross-section along BB'. Figure 10 for Figure 3A cross-sectional view along CC' shows that the touch display panel 100 includes a first touch conductive layer 41, a second touch conductive layer 42, and a touch insulating layer 40. The touch insulating layer 40 is located between the first touch conductive layer 41 and the second touch conductive layer 42. A first sensing electrode 11, a first driving electrode 12, and a first connecting portion 131 are disposed in the same layer on the first touch conductive layer 41, while the second connecting portion 132 is disposed in the second touch conductive layer 42, which is different from the first touch conductive layer 41.

[0076] Optionally, in embodiments of the present invention, the second sensing electrode 21, the second driving electrode 22, and the third connecting portion ( Figure 9 and Figure 10 (Not shown) is disposed on the same layer as the first touch conductive layer 41, and the fourth connecting part ( Figure 9 and Figure 10 (Not shown) is disposed in a second touch conductive layer 42, which is different from the first touch conductive layer 41.

[0077] For example, the first sensing electrode 11, the second sensing electrode 21, the first connecting portion 131, the first driving electrode 12, the second driving electrode 22, and the third connecting portion can be formed using the same patterning process. For example, the first sensing electrode 11, the second sensing electrode 21, the first connecting portion 131, the first driving electrode 12, the second driving electrode 22, and the third connecting portion are made of the same material and have the same thickness.

[0078] For example, the first touch conductive layer 41 described above includes a transparent metal oxide layer. Optionally, the first touch conductive layer 41 includes any one of indium tin oxide, indium zinc oxide, and indium gallium zinc oxide.

[0079] Optionally, the second touch conductive layer 42 may include a metal layer.

[0080] Combination Figure 3 , Figure 4 and Figure 10 As shown, along the first direction h1, the first sensing electrode 11 and the adjacent second sensing electrode 21 at the edge of the first touch unit 1 away from the touch display panel 100 form an electrode block. This electrode block can be an integral structure, that is, there is no interface between the first sensing electrode 11 and the adjacent second sensing electrode 21. Figure 3 As shown, the electrode block is quadrilateral in shape.

[0081] Combination Figure 3 , Figure 4 and Figure 9As shown, along the second direction h2, the first driving electrode 12 and the adjacent second driving electrode 22 at the edge of the first touch unit 1 away from the touch display panel 100 form an electrode block. This electrode block can also be an integral structure, that is, there is no interface between the first driving electrode 12 and the adjacent second driving electrode 22. Figure 3 As shown, the shape of the electrode block is also quadrilateral.

[0082] Optionally, embodiments of the present invention may allow the conductivity of the first sensing electrode 11 to be less than the conductivity of the second sensing electrode 21; and / or, allow the conductivity of the first driving electrode 12 to be less than the conductivity of the second driving electrode 22. For example, in the two first sensing electrodes 11 and two second driving electrodes 12 included in the first touch unit 1, embodiments of the present invention may allow the conductivity of the first sensing electrode 11 with the smaller area to be less than the conductivity of the second sensing electrode 21; and / or, allow the thickness of the first sensing electrode 11 with the smaller area to be less than the thickness of the second sensing electrode 21. This configuration may also make the impedance of the first sensing electrode 11 with the smaller area and the impedance of the second sensing electrode 21 with the larger area close. In this case, embodiments of the present invention may not require the aforementioned perforation in the first sensing electrode 11. Alternatively, embodiments of the present invention may allow the perforation in the first sensing electrode 11 to be formed while differentiating the conductivity and / or thickness of the first sensing electrode 11 and the second sensing electrode 21, thereby improving the impedance of the first sensing electrode 11 with the smaller area from multiple dimensions.

[0083] Optionally, embodiments of the present invention may allow the conductivity of the first driving electrode 12 with a smaller area to be less than the conductivity of the second driving electrode 22; and / or, allow the thickness of the first driving electrode 12 with a smaller area to be less than the thickness of the second driving electrode 22. This configuration may also make the impedance of the first driving electrode 12 with a smaller area and the impedance of the second driving electrode 22 with a larger area close. In this case, embodiments of the present invention may omit the aforementioned perforation in the first driving electrode 12. Alternatively, embodiments of the present invention may differentiate the conductivity and / or thickness of the first driving electrode 12 and the second driving electrode 22, while also allowing perforations to be formed in the first driving electrode 12 to improve the impedance of the first driving electrode 12 with a smaller area from multiple dimensions.

[0084] When adjusting the thickness of the first sensing electrode 11, which has a small area, for example, such as Figure 11 As shown, Figure 11 for Figure 3In another cross-sectional view along CC', the first sensing electrode 11 includes a fifth sub-region A15 and a sixth sub-region A16, the thickness of the fifth sub-region A15 being less than the thickness of the sixth sub-region A16; the thickness of the fifth sub-region A15 is less than the thickness of the second sensing electrode 21. By providing multiple sub-regions with different thicknesses in the first sensing electrode 11, and ensuring that the thickness of the fifth sub-region A15 of the first sensing electrode 11 is less than the thickness of the second sensing electrode 21, the impedance difference between the first sensing electrode 11 (with a smaller area) and the second sensing electrode 21 (with a larger area) can satisfy the aforementioned first preset threshold. Furthermore, this configuration allows for flexible adjustment of the thickness of the first sensing electrode 11 in different sub-regions, facilitating fine-tuning of the impedance of the first sensing electrode 11.

[0085] For example, such as Figure 11 As shown, the distance between the fifth sub-region A15 and the first connecting portion 131 is greater than the distance between the sixth sub-region A16 and the first connecting portion 131. Optionally, along the direction from the first connecting portion 131 to the first sensing electrode 11, the thickness of the first sensing electrode 11 can be gradually reduced in this embodiment, and the maximum thickness of the first sensing electrode 11 can be made equal to the thickness of the first connecting portion 131. For example, this embodiment can make the thickness of the first connecting portion 131, the third connecting portion ( Figure 11 The thickness of the first connecting part 131 (not shown) and the thickness of the second sensing electrode 21 are equal. This arrangement makes the environment around the first connecting part 131 more consistent with the environment around the third connecting part, which helps to improve the touch uniformity at different locations in the touch display panel 100.

[0086] When adjusting the thickness of the first driving electrode 12, which has a relatively small area, embodiments of the present invention may also provide multiple sub-regions with different thicknesses in the first driving electrode 12, and gradually reduce the thickness of the first driving electrode 12 along the direction from the second connecting portion 132 to the first driving electrode 12. For example, embodiments of the present invention may make the maximum thickness of the first driving electrode 12 equal to the thickness of the fourth connecting portion 232, so that the environment around the second connecting portion 132 tends to be consistent with the environment around the fourth connecting portion 232, thereby improving the touch uniformity at different locations in the touch display panel 100.

[0087] For example, such as Figure 12 and Figure 13 As shown, Figure 12 This is a schematic diagram of another first touch unit 1 and second touch unit 2 provided in an embodiment of the present invention. Figure 13 for Figure 12According to a cross-sectional view along DD', in this embodiment of the invention, the first sensing electrode 11 with a smaller area can be configured as including a first sub-electrode 111 and a second sub-electrode 112 stacked together. The area of ​​the orthographic projection of the first sub-electrode 111 onto the plane of the touch display panel is smaller than the area of ​​the orthographic projection of the second sensing electrode 21 onto the plane of the touch display panel, and the area of ​​the orthographic projection of the second sub-electrode 112 onto the plane of the touch display panel is smaller than the area of ​​the orthographic projection of the second sensing electrode 21 onto the plane of the touch display panel. The first sub-electrode 111 and the second sub-electrode 112 are electrically connected. The first sub-electrode 111 and the second sub-electrode 112 are disposed in different layers.

[0088] like Figure 13 As shown, along a direction perpendicular to the plane of the touch display panel 100, a first insulating layer 43 is further included between the first sub-electrode 111 and the second sub-electrode 112. The first insulating layer 43 includes a first via H1; the first sub-electrode 111 and the second sub-electrode 112 are electrically connected through the first via H1. Exemplarily, in embodiments of the present invention, the first sub-electrode 111 and the aforementioned first connecting portion 131 can be disposed on the same layer, while the second sub-electrode 112 and the first connecting portion 131 can be disposed on different layers.

[0089] For example, in embodiments of the present invention, one of the first sub-electrode 111 and the second sub-electrode 112 can be electrically connected to the touch sensing line 31, and the other can be electrically connected to the first connecting portion 131. For example... Figure 13 As shown, one end of the second sub-electrode 112 is electrically connected to the touch sensing line 31, and the other end of the second sub-electrode 112 is electrically connected to the first sub-electrode 111. The first sub-electrode 111 is electrically connected to the first connecting portion 131. That is, the first sub-electrode 111 and the second sub-electrode 112 are connected in series between the touch sensing line 31 and the first connecting portion 131. This arrangement can extend the current transmission path between the touch sensing line 31 and the first connecting portion 131, and can make the impedance of the first sensing electrode 11, which includes the first sub-electrode 111 and the second sub-electrode 112, close to the impedance of the second sensing electrode 21, which has a larger area.

[0090] For example, such as Figure 12 As shown, in this embodiment of the invention, the area of ​​the second sub-electrode 112 can be less than or equal to the area of ​​the first sub-electrode 111, and the orthographic projection of the second sub-electrode 112 onto the plane where the first sub-electrode 111 is located is within the first sub-electrode 111. This arrangement can prevent the first sub-electrode 111 and the second sub-electrode 112 from occupying more space in the touch display panel 100, and can ensure that the touch display panel 100 is designed according to the required shape.

[0091] Optionally, in embodiments of the present invention, at least one of the first sub-electrode 111 and the second sub-electrode 112 may be provided with a hole to further increase the impedance of the first sensing electrode 11 by reducing the number of charge transport channels in the first sub-electrode 111 or the second sub-electrode 112. The method of providing the hole in the first sub-electrode 111 and the second sub-electrode 112 is the same as the method of providing the hole in the first sensing electrode 11 described above, and will not be repeated here.

[0092] And / or,

[0093] In embodiments of the present invention, the conductivity of at least one of the first sub-electrode 111 and the second sub-electrode 112 may be set to be less than the conductivity of the second sensing electrode 21. For example, in embodiments of the present invention, the conductivity of the first sub-electrode 111 and the second sensing electrode 21 may be set to be the same, while the conductivity of the second sub-electrode 112 may be set to be less than the conductivity of the second sensing electrode 21.

[0094] And / or,

[0095] In embodiments of the present invention, the thickness of at least one of the first sub-electrode 111 and the second sub-electrode 112 may be less than the thickness of the second sensing electrode 21. For example, in embodiments of the present invention, the thicknesses of the first sub-electrode 111 and the second sensing electrode 21 may be the same, while the thickness of the second sub-electrode 112 may be less than the thickness of the second sensing electrode 21.

[0096] For example, such as Figure 13 As shown, in this embodiment of the invention, the first sub-electrode 111 and the second sensing electrode 21 can be arranged in the same layer, so that the first sub-electrode 111 and the second sensing electrode 21 can be formed through the same patterning process, simplifying the manufacturing process of the touch display panel 100.

[0097] Optional, such as Figure 14 and Figure 15 As shown, Figure 14 This is a schematic diagram of yet another first touch unit and a second touch unit provided in an embodiment of the present invention. Figure 15 for Figure 14 A schematic cross-sectional view along EE', illustrating the electrical connection of both the touch sensing line 31 and the first connecting portion 131 to the first sub-electrode 111, as shown. Figure 14 and Figure 15 As shown, in this embodiment of the invention, the first sub-electrode 111 can be configured to include an overlapping portion 1111 and a non-overlapping portion 1112. Along a direction perpendicular to the plane where the touch display panel is located, the overlapping portion 1111 and the second sub-electrode 112 overlap, while the non-overlapping portion 1112 and the second sub-electrode 112 do not overlap.

[0098] For example, in embodiments of the present invention, the thickness of at least one of the second sub-electrode 112 and the overlapping portion 1111 can be set to be less than or equal to the thickness of the second sensing electrode 21, and / or the conductivity of at least one of the second sub-electrode 112 and the overlapping portion 1111 can be set to be less than or equal to the conductivity of the second sensing electrode 21. Figure 15 As shown, the thicknesses of the non-overlapping portion 1112, the second sub-electrode 112, and the second sensing electrode 21 are all T2, while the thickness of the overlapping portion 1111 is T1, with T1 < T2 for illustration. This configuration ensures that the absolute value of the impedance difference between the first sensing electrode 11 and the second sensing electrode 21 is less than or equal to the aforementioned first preset threshold.

[0099] For example, such as Figure 15 As shown, in this embodiment of the invention, the overlapping portion 1111 and the non-overlapping portion 1112 can both be disposed on the same layer as the second sensing electrode 21, so that the overlapping portion 1111, the non-overlapping portion 1112 and the second sensing electrode 21 can be formed by the same patterning process.

[0100] Or, such as Figure 16 As shown, Figure 16 This is a cross-sectional schematic diagram of another touch display panel provided in an embodiment of the present invention. In this embodiment of the present invention, the overlapping portion can be removed. That is, a hole is provided in the first sub-electrode 111, and the hole overlaps with the second sub-electrode 112 along the direction perpendicular to the plane where the touch display panel 100 is located, so as to ensure that the absolute value of the impedance difference between the first sensing electrode 11 and the second sensing electrode 21 is less than or equal to the first preset threshold.

[0101] For example, when the area of ​​the first driving electrode 12 is smaller than the area of ​​the second driving electrode 22, the first driving electrode 12 can also be configured to include at least two sub-electrodes stacked together. The configuration of the sub-electrodes is similar to that of the sub-electrodes in the first sensing electrode 11 described above, and will not be repeated here.

[0102] For example, in embodiments of the present invention, the conductivity of the first connection portion 131 and the second connection portion 132 in the first touch unit 1 can be made the same so that when static electricity of the same intensity flows through the first connection portion 131 and the second connection portion 132, the same instantaneous voltage is generated, thereby avoiding the formation of an excessive voltage difference between the first connection portion 131 and the second connection portion 132, so as to avoid the first connection portion 131 and the second connection portion 132 being damaged by electrostatic discharge, and ensuring the reliability of the touch display panel 100.

[0103] Optionally, in embodiments of the present invention, the first connecting portion 131 and the second connecting portion 132 may be made of the same material. For example, both may comprise a transparent metal oxide, or both may comprise a metallic material.

[0104] For example, the touch display panel 100 may include a plurality of first touch units 1 adjacent to the edge E of the touch display panel 100. The area of ​​the orthographic projection of each first touch unit 1 onto the plane of the touch display panel 100 is smaller than the area of ​​the orthographic projection of the second touch unit 2 onto the plane of the touch display panel 100. The absolute value of the impedance difference between at least two first touch units 1 is less than a second preset threshold. This configuration can make the impedance between different first touch units 1 as consistent as possible, preventing any one first touch unit 1 from becoming a weak point in the electrostatic discharge of the touch display panel 100, and thus improving the electrostatic reliability of the entire touch display panel 100.

[0105] For example, the second preset threshold is equal to the first preset threshold.

[0106] For example, such as Figure 3 As shown, the touch display panel 100 also includes a shielding line 30, which is located between the touch sensing line 31 and the touch driving line 32. The shielding line 30 includes a conductive material. The shielding line 30 is insulated from both the touch sensing line 31 and the touch driving line 32. For example, the shielding line 30 transmits a constant signal. The shielding line 30 reduces mutual interference between the different signals transmitted by the touch sensing line 31 and the touch driving line 32, which helps improve the accuracy of the signals transmitted on the touch sensing line 31 and the touch driving line 32, thereby improving the accuracy of touch operation.

[0107] like Figure 1 As shown, the shielding line 30 terminates at the boundary between the first sensing electrode 11 and the first driving electrode 12. In this embodiment of the invention, the shielding line 30 terminating at the boundary between the first sensing electrode 11 and the first driving electrode 12 means that the shortest distance between the shielding line 30 and the boundary between the first sensing electrode 11 and the first driving electrode 12 is less than the shortest distance between the shielding line 30 and the first sensing electrode 11, and that the shortest distance between the shielding line 30 and the boundary between the first sensing electrode 11 and the first driving electrode 12 is less than the shortest distance between the shielding line 30 and the first driving electrode 12.

[0108] Optional, such as Figure 3 As shown, the touch display panel 100 also includes a grounding signal line 5. The grounding signal line 5 can promptly conduct static electricity away from the touch display panel 100, reducing the impact of static electricity on the electronic structure of the touch display panel 100. For example, as... Figure 3 As shown, the ground signal line 5 is located between the touch sensing line 31 and the edge E of the touch display panel 100. The ground signal line 5 is also located between the touch driving line 32 and the edge E of the touch display panel 100.

[0109] This invention also provides a touch display device, such as... Figure 17 As shown, Figure 17 This is a schematic diagram of a touch display device provided in an embodiment of the present invention. The touch display device includes the touch display panel 100 described above. The specific structure of the touch display panel 100 has been described in detail in the above embodiments and will not be repeated here. Figure 17 The touch display device shown is for illustrative purposes only. The touch display device can be any electronic device with display function, such as a mobile phone, tablet computer, laptop computer, e-reader or television.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A touch display panel, characterized in that, It includes a first region and a second region, wherein the first region is located on the side of the second region near the edge of the touch display panel; The first region includes a first touch unit, and the second region includes a plurality of second touch units, which are arranged in a repeating array within the second region along a first direction and a second direction; the first direction and the second direction intersect. The area of ​​the first touch unit projected onto the plane of the touch display panel is smaller than the area of ​​the second touch unit projected onto the plane of the touch display panel; the absolute value of the difference between the impedance of the first touch unit and the impedance of the second touch unit is less than a first preset threshold. The first touch unit includes two first sensing electrodes arranged along the first direction. The first sensing electrode includes a hole; The shortest distance between the edge of the first sensing electrode and the hole is d1; The first touch unit further includes a first connecting portion, which connects two adjacent first sensing electrodes. The width of the first connecting portion is d2, and the width direction of the first connecting portion is perpendicular to the arrangement direction of the two adjacent first sensing electrodes. d1 > d2.

2. The touch display panel according to claim 1, characterized in that, The first touch unit includes two first driving electrodes arranged along the second direction; along the second direction, two first sensing electrodes are located between two adjacent first driving electrodes; along the first direction, two first driving electrodes are located between two adjacent first sensing electrodes. The second touch unit includes two second sensing electrodes arranged along a first direction, and two second driving electrodes arranged along a second direction; along the second direction, the two second sensing electrodes are located between two adjacent second driving electrodes. Along the first direction, two second driving electrodes are located between two adjacent second sensing electrodes; At least one of the first driving electrodes has an area of ​​orthographic projection onto the plane where the touch display panel is located that is smaller than the area of ​​orthographic projection onto the plane where the touch display panel is located. And / or, the area of ​​the orthographic projection of at least one of the first sensing electrodes onto the plane where the touch display panel is located is smaller than the area of ​​the orthographic projection of the second sensing electrode onto the plane where the touch display panel is located. The absolute value of the difference between the impedance of the first sensing electrode and the impedance of the second sensing electrode is less than the first preset threshold, and the absolute value of the difference between the impedance of the first driving electrode and the impedance of the second driving electrode is less than the first preset threshold.

3. The touch display panel according to claim 2, characterized in that, At least one of the first driving electrode and the first sensing electrode includes a hole.

4. The touch display panel according to claim 3, characterized in that, The first sensing electrode includes at least two of the said holes, with two adjacent said holes at least partially overlapping in the first direction.

5. The touch display panel according to claim 3, characterized in that, The first touch unit further includes a second connection portion, which connects two adjacent first driving electrodes. The first connection portion and the second connection portion are insulated from each other and cross each other. The first connection portion is disposed on the same layer as the first sensing electrode.

6. The touch display panel according to claim 3, characterized in that, The first touch unit further includes a second connecting portion, which connects two adjacent first driving electrodes. The first connecting portion and the second connecting portion are insulated from each other and cross each other. The first connecting portion is disposed on the same layer as the first sensing electrode. The first sensing electrode includes a first sub-region and a second sub-region, wherein the second sub-region is located on the side of the first sub-region away from the first connection portion. The density of the holes in the first sub-region is less than the density of the holes in the second sub-region.

7. The touch display panel according to claim 3, characterized in that, The first sensing electrode includes the cutout, and the cutout in the first sensing electrode is surrounded by the edge of the first sensing electrode.

8. The touch display panel according to claim 7, characterized in that, The shape of the hole in the first sensing electrode may be circular or polygonal.

9. The touch display panel according to claim 3, characterized in that, The first sensing electrode includes the cutout, which extends from the edge of the first sensing electrode toward the interior of the first sensing electrode to form a slit.

10. The touch display panel according to claim 9, characterized in that, The shape of the slit can be any one of a straight line, a broken line, or an arc.

11. The touch display panel according to claim 9, characterized in that, The first sensing electrode includes a first edge and a second edge disposed opposite to each other along the second direction; The slit includes a first slit and a second slit, wherein the first slit extends from the first edge toward the interior of the first sensing electrode; The second slit extends from the second edge toward the interior of the first sensing electrode, and the first slit and the second slit at least partially overlap in the second direction.

12. The touch display panel according to claim 3, characterized in that, The first sensing electrode and the second sensing electrode are disposed in the same layer.

13. The touch display panel according to claim 2, characterized in that, The conductivity of the first sensing electrode is less than that of the second sensing electrode; and / or, the thickness of the first sensing electrode is less than that of the second sensing electrode.

14. The touch display panel according to claim 13, characterized in that, The thickness of the first sensing electrode is less than the thickness of the second sensing electrode; The first sensing electrode includes a fifth sub-region and a sixth sub-region, wherein the thickness of the fifth sub-region is less than the thickness of the sixth sub-region; and the thickness of the fifth sub-region is less than the thickness of the second sensing electrode.

15. The touch display panel according to claim 14, characterized in that, The distance between the fifth sub-region and the first connecting part is greater than the distance between the sixth sub-region and the first connecting part.

16. The touch display panel according to claim 2, characterized in that, The first sensing electrode includes two sub-electrodes stacked along a direction perpendicular to the touch display panel; A first insulating layer is included between the two stacked sub-electrodes, and the first insulating layer includes a first via; the two stacked sub-electrodes are electrically connected through the first via. The conductivity of at least one of the sub-electrodes is less than that of the second sensing electrode, and / or the thickness of at least one of the sub-electrodes is less than that of the second sensing electrode; and / or the at least one of the sub-electrodes includes a perforation.

17. The touch display panel according to claim 16, characterized in that, At least one of the sub-electrodes is disposed in the same layer as the second sensing electrode.

18. The touch display panel according to claim 2, characterized in that, The first touch unit also includes a second connecting part; The second connecting portion is used to connect two adjacent first driving electrodes; the first connecting portion and the second connecting portion are insulated from each other. Along a direction perpendicular to the plane of the touch display panel, the first connecting portion and the second connecting portion at least partially overlap, and the first connecting portion and the second connecting portion have the same conductivity.

19. The touch display panel according to claim 18, characterized in that, The first connecting part and the second connecting part are made of the same material.

20. A touch display device, characterized in that, Includes the touch display panel as described in any one of claims 1-19.

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