Touch panel and touch display device

Abstract

The embodiment of the invention discloses a touch panel and a touch display device, relates to the technical field of display, and solves the problem of poor lineation linearity of a gap area of the touch panel. The touch panel comprises a substrate, a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the first touch electrodes are arranged on the substrate in the first direction and connected in series, and the second touch electrodes are arranged in the second direction and connected in series. The first touch electrodes and the second touch electrodes are insulated from each other. The substrate is provided with at least two mounting holes located in the touch area, and a gap area is formed between every two adjacent mounting holes. The first touch electrodes located in the gap areas form first gap electrodes and second gap electrodes. The second touch electrodes located in the gap areas form third gap electrodes and fourth gap electrodes. The third gap electrode is located between the first gap electrode and the second gap electrode. The touch panel is applied to the touch display device, so that the touch display device displays a picture.

Description

[0001] This application is a divisional application. The original application was filed on October 27, 2020, with application number 202080002511.0. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present disclosure relates to the field of display technology, and in particular to a touch panel and a touch display device. Background Art

[0003] With the continuous development of electronic products, touch-sensitive display devices with both touch and display functions have become widely used, enabling simple and flexible human-computer interaction. Touch panel structures in touch-sensitive display devices include, for example, single-glass (OGS) touch panels, on-cell touch panels, and in-cell touch panels. Summary of the Invention

[0004] The purpose of some embodiments of the present disclosure is to provide a touch panel and a touch display device, which increase the facing area between the first touch electrode and the second touch electrode, thereby increasing the mutual capacitance between the first touch electrode and the second touch electrode, and improving the problem of poor linearity of the lines in the gap area of ​​the touch panel.

[0005] To achieve the above objectives, some embodiments of the present disclosure provide the following technical solutions:

[0006] In one aspect, a touch panel is provided, comprising a touch area; the touch panel comprises a base substrate and a touch function layer disposed on the base substrate. The touch function layer comprises a plurality of first touch units extending along a first direction and a plurality of second touch units extending along a second direction. Each first touch unit comprises a plurality of first touch electrodes arranged and connected in series along the first direction, and each second touch unit comprises a plurality of second touch electrodes arranged and connected in series along the second direction. The first touch electrodes are insulated from the second touch electrodes. The first and second directions intersect.

[0007] The base substrate has at least two mounting holes located in the touch area, and the touch function layer is hollowed out at the positions of the at least two mounting holes; and a gap area is provided between two adjacent mounting holes.

[0008] In a first touch unit passing through the gap region, the first touch electrodes located within the gap region form a first gap electrode and a second gap electrode arranged along the first direction and electrically connected to each other. In a second touch unit passing through the gap region, the second touch electrodes located within the gap region form a third gap electrode and a fourth gap electrode arranged along the second direction and electrically connected to each other. Along the first direction, the third gap electrode is located between the first gap electrode and the second gap electrode.

[0009] In the above-mentioned embodiment of the present disclosure, when the distance between at least two mounting holes remains unchanged, a first gap electrode, a second gap electrode, a third gap electrode and a fourth gap electrode are provided through the gap region. Along the first direction, the third gap electrode is located between the first gap electrode and the second gap electrode, so that the two sides of the third gap electrode in the gap region are opposite to the first gap electrode and the second gap electrode, thereby increasing the contour perimeter of the first touch electrode and the second touch electrode in the region, thereby increasing the facing area between the first touch electrode and the second touch electrode, and further increasing the mutual capacitance between the first touch electrode and the second touch electrode, thereby improving the problem of poor linearity of the scribing line in the gap region of the touch panel.

[0010] In some embodiments, the first gap electrode and / or the second gap electrode have a profile that is at least partially different from a profile of a first touch electrode located outside the gap region. The third gap electrode and / or the fourth gap electrode have a profile that is at least partially different from a profile of a second touch electrode located outside the gap region. The third gap electrode is embedded within the integral electrode formed by the electrical connection of the first gap electrode and the second gap electrode.

[0011] In some embodiments, the mutual capacitance between the first gap electrode and the second gap electrode, and between the third gap electrode and the fourth gap electrode is C1; the mutual capacitance between the first touch electrode and the second touch electrode located outside the gap area is C2; and the ratio of C1 to C2 ranges from 0.75 to 0.8.

[0012] In some embodiments, the distance between two adjacent mounting holes located on both sides of the gap area ranges from 900 μm to 1200 μm.

[0013] In some embodiments, a ratio of the sum of the areas of the third gap electrode and the fourth gap electrode to the sum of the areas of the first gap electrode and the second gap electrode is in a range of 1.2 to 1.4.

[0014] In some embodiments, the ratio of the area of ​​the second touch electrodes to the area of ​​the first touch electrodes in the non-gap region ranges from 0.9 to 1.

[0015] In some embodiments, an edge of at least one of the third gap electrode and the fourth gap electrode has at least one branch, the edge is close to at least one of the first gap electrode and the second gap electrode, and the at least one branch extends into the gap electrode to which the edge is close.

[0016] In some embodiments, the edge of the branch is in a broken line shape.

[0017] In some embodiments, the third gap electrode and the first gap electrode have mutually adjacent contours that are complementary, and the third gap electrode and the second gap electrode have mutually adjacent contours that are complementary.

[0018] In some embodiments, the contour of the third gap electrode has protrusions of various shapes, and the protrusions of various shapes include at least two of wavy protrusions, rectangular protrusions, trapezoidal protrusions, and triangular protrusions.

[0019] The third gap electrode includes a first portion, a second portion, and a third portion that are connected to form an integral whole. The first portion, the second portion, and the third portion are arranged in sequence along the second direction, with the third gap electrode pointing toward the fourth gap electrode. The average dimensions of the first portion and the third portion along the first direction are both smaller than the average dimensions of the second portion along the first direction.

[0020] In some embodiments, a contour of the first portion close to the first gap electrode and a contour of the first portion close to the second gap electrode both have the wavy protrusions.

[0021] In some embodiments, the two adjacent mounting holes on either side of the gap region are respectively a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are arranged along the first direction. The first gap electrode is adjacent to a side of the first mounting hole that is closer to the gap region, and the second gap electrode is adjacent to a side of the second mounting hole that is closer to the gap region.

[0022] Wherein, in the touch area, the area around the first mounting hole and the second mounting hole but not the gap area is a hole edge area, and the area in the touch area other than the gap area and the hole edge area is a normal area.

[0023] In some embodiments, the first touch electrode and the second touch electrode include a metal mesh structure, and a line width of the metal mesh of at least one of the first gap electrode, the second gap electrode, the third gap electrode, and the fourth gap electrode is greater than a line width of the metal mesh of the touch electrode located in the normal area.

[0024] In some embodiments, the line width of the metal grid of at least one of the first gap electrode, the second gap electrode, the third gap electrode, and the fourth gap electrode ranges from 3.8 μm to 5.2 μm; the line width of the metal grid of the touch electrode located in the normal area ranges from 2.8 μm to 4.2 μm.

[0025] In some embodiments, the first gap electrode includes: a first main sub-electrode, and a first compensation sub-electrode arranged near the first mounting hole; the first main sub-electrode is a metal grid structure, the first compensation sub-electrode is a planar electrode, and the first main sub-electrode is electrically connected to the first compensation sub-electrode; and / or, the second gap electrode includes: a second main sub-electrode, and a second compensation sub-electrode arranged near the second mounting hole; the second main electrode is a metal grid structure, the second compensation sub-electrode is a planar electrode, and the second main electrode is electrically connected to the second compensation sub-electrode.

[0026] In some embodiments, the ratio of the sum of the areas of the third gap electrode and the fourth gap electrode to the sum of the area of ​​the metal grid of the first main sub-electrode, the area of ​​the first compensation sub-electrode, the area of ​​the metal grid of the second main sub-electrode and the area of ​​the second compensation sub-electrode is less than 1.3 and greater than or equal to 1.

[0027] In some embodiments, in each touch unit passing through the first mounting hole and the second mounting hole, each touch electrode located in the hole edge region forms a hole edge electrode. The hole edge electrode includes: a main sub-electrode and a compensation sub-electrode disposed near the corresponding mounting hole; the main sub-electrode is a metal mesh structure, and the compensation sub-electrode is a planar electrode, and the main sub-electrode and the compensation sub-electrode are electrically connected.

[0028] In some embodiments, in a second touch unit passing through the first mounting hole, the two second touch electrodes located on either side of the first mounting hole along the second direction respectively form a first hole-edge electrode and a second hole-edge electrode; the first hole-edge electrode, the third gap electrode, the fourth gap electrode, and the second hole-edge electrode are electrically connected in sequence. In a second touch unit passing through the second mounting hole, the two second touch electrodes located on either side of the second mounting hole along the second direction respectively form a third hole-edge electrode and a fourth hole-edge electrode; the third hole-edge electrode and the fourth hole-edge electrode are electrically connected via a first connecting wire, which extends along the contour of the second mounting hole.

[0029] The first hole-side electrode, the third gap electrode, the fourth gap electrode and the second hole-side electrode are electrically connected to form a whole, which is insulated from the third hole-side electrode, the fourth hole-side electrode and the first connecting wire.

[0030] In some embodiments, in the first touch unit passing through the first mounting hole and the second mounting hole, the first touch electrode located on the side of the first mounting hole away from the second mounting hole forms a fifth hole-edge electrode; the first touch electrode located on the side of the second mounting hole away from the first mounting hole forms a sixth hole-edge electrode. The fifth hole-edge electrode is electrically connected to the first gap electrode via a second connecting wire, which extends along the outline of the first mounting hole. The sixth hole-edge electrode is electrically connected to the second gap electrode via a third connecting wire, which extends along the outline of the second mounting hole.

[0031] In some embodiments, each second touch-sensing unit further includes a plurality of bridging structures. Along the second direction, every two adjacent second touch-sensing electrodes are electrically connected via a bridging structure. The third gap electrode and the fourth gap electrode are electrically connected via a bridging structure located within the gap region. In a second touch-sensing unit passing through the gap region, a line connecting the center of any bridging structure located outside the gap region and the center of the bridging structure connecting the third gap electrode and the fourth gap electrode intersects the second direction.

[0032] In some embodiments, the touch function layer includes a touch electrode layer, an insulating layer, and a bridging structure layer stacked on the base substrate. The insulating layer is located between the touch electrode layer and the bridging structure layer, and the bridging structure layer is located on the side of the touch electrode layer that is closer to or farther from the base substrate. The first touch electrodes and the second touch electrodes are disposed in the touch electrode layer. Along the first direction, every two adjacent first touch electrodes are directly electrically connected, and along the second direction, every two adjacent second touch electrodes are disposed independently of each other.

[0033] The insulating layer has a plurality of via holes, and each second touch unit includes a plurality of bridge structures arranged in the bridge structure layer. Along the second direction, every two adjacent second touch electrodes pass through different via holes and are electrically connected to a bridge structure respectively.

[0034] The bridge structure for connecting the third gap electrode and the fourth gap electrode is a gap bridge structure. The third gap electrode and the fourth gap electrode pass through different via holes in the insulating layer and are electrically connected to the gap bridge structure respectively.

[0035] In some embodiments, the gap bridging structure has a hollow portion, and an orthographic projection of a conductive pattern for directly electrically connecting the first gap electrode and the second gap electrode on the base substrate at least partially overlaps with an orthographic projection of the hollow portion of the gap bridging structure on the base substrate.

[0036] In some embodiments, when the touch electrode layer includes a third hole edge electrode, a fourth hole edge electrode, a fifth hole edge electrode, and a sixth hole edge electrode, and the third hole edge electrode and the fourth hole edge electrode are electrically connected via a first connecting wire, the fifth hole edge electrode and the first gap electrode are electrically connected via a second connecting wire, and the sixth hole edge electrode and the second gap electrode are electrically connected via a third connecting wire:

[0037] The first connecting wire is disposed in the bridging structure layer, passing through different vias in the insulating layer and electrically connecting to the third hole-edge electrode and the fourth hole-edge electrode, respectively. The second connecting wire is disposed in the touch electrode layer, directly electrically connecting to the fifth hole-edge electrode and the first gap electrode. The third connecting wire is disposed in the touch electrode layer, directly electrically connecting to the sixth hole-edge electrode and the second gap electrode.

[0038] In some embodiments, the touch function layer also includes: a light blocking portion, at least one connecting wire, a first signal shielding portion and an electrode line, which are sequentially arranged around the mounting hole along the radial direction of the mounting hole and from the center of the mounting hole to the edge; the light blocking portion, the connecting wire, the first signal shielding portion and the electrode line all extend along the contour of the mounting hole.

[0039] Wherein, the light blocking portion extends along the edge of the mounting hole to form a closed loop structure, and the light blocking portion is configured to block the light passing through the mounting hole from entering the area around the mounting hole. The connecting wire is configured to electrically connect two adjacent first touch electrodes arranged along the first direction, or to electrically connect two adjacent second touch electrodes arranged along the second direction. The electrode line is configured to electrically connect the edge of the first touch electrode or the second touch electrode close to the mounting hole. The first signal shielding portion is at least arranged between the adjacent connecting wires and the electrode line, and the first signal shielding portion is configured to prevent crosstalk between the electrical signals transmitted by the adjacent connecting wires and the electrode line.

[0040] In some embodiments, a plurality of connecting wires are disposed between the light-blocking portion and the first signal shielding portion, and a second signal shielding portion is disposed between two adjacent connecting wires; the second signal shielding portion extends along a contour of the mounting hole. The second signal shielding portion is configured to prevent crosstalk between electrical signals transmitted on the two adjacent connecting wires.

[0041] On the other hand, a touch display device is provided, comprising the touch panel as described in any one of the above embodiments.

[0042] The beneficial effects that can be achieved by the touch display device provided by the embodiments of the present disclosure are the same as the beneficial effects that can be achieved by the touch panel described in any of the above embodiments, and are not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0044] Figure 1 is a top view of a touch panel according to some embodiments;

[0045] Figure 2 for Figure 1 A local enlarged view of the area shown in the dotted box C';

[0046] Figure 3 For a touch panel according to some embodiments Figure 2 A cross-sectional view of the section line AA';

[0047] Figure 4 is a top view of a touch electrode layer in a touch functional layer according to some embodiments;

[0048] Figure 5 is a top view of a bridging structure layer in a touch function layer according to some embodiments;

[0049] Figure 6 For Figure 1 Another partial enlarged view of the area shown in the middle dashed box C';

[0050] Figure 7 For a touch panel according to some embodiments Figure 6 A cross-sectional view of the section line BB';

[0051] Figure 8 is another top view of a touch electrode layer in a touch functional layer according to some embodiments;

[0052] Figure 9 is another top view of a bridging structure layer in a touch function layer according to some embodiments;

[0053] Figure 10 is a partial enlarged view of a hole edge region and a gap region of a touch panel according to some embodiments;

[0054] Figure 11A is a structural diagram of a branch on a fourth gap electrode according to some embodiments;

[0055] Figure 11B is another structural diagram of branches on the fourth gap electrode according to some embodiments;

[0056] Figure 12 for Figure 10 A structural diagram of the metal mesh of the touch electrode in the area shown in the dotted box F;

[0057] Figure 13A is a structural diagram of a metal mesh of a touch electrode in a gap region according to some embodiments;

[0058] Figure 13B is a structural diagram of a first portion of a third gap electrode in a gap region according to some embodiments;

[0059] Figure 14A A simplified top view of a hole edge region and a gap region of a touch panel according to some embodiments;

[0060] Figure 14B is a detailed top view of the hole edge area and the gap area of ​​the touch panel according to some embodiments;

[0061] Figure 15 for Figure 14B A partial enlarged view of the metal grid structure in the area shown in the middle dotted box E1;

[0062] Figure 16 is a structural diagram of a compensation sub-electrode in a gap region of a touch panel according to some embodiments;

[0063] Figure 17 for Figure 14B A partial enlarged view of the area shown in the middle dotted box E2;

[0064] Figure 18 for Figure 14B A partial enlarged view of the area shown in the middle dotted box E3;

[0065] Figure 19 is a structural diagram of a metal mesh of a touch electrode in a gap region of a touch panel according to some embodiments;

[0066] Figure 20 is a structural diagram of a gap bridging structure in a bridging structure layer in a gap region of a touch panel according to some embodiments;

[0067] Figure 21 is a structural diagram of a hole edge region of a touch panel according to some embodiments;

[0068] Figure 22is another structural diagram of the hole edge area of ​​a touch panel according to some embodiments;

[0069] Figures 23A to 23D are structural diagrams of an aperture ring of a touch panel according to some embodiments;

[0070] Figure 24 is a cross-sectional view of a touch display device according to some embodiments;

[0071] Figure 25 is another cross-sectional view of a touch display device according to some embodiments;

[0072] Figure 26A A simplified top view of a gap area of ​​a touch panel in the related art;

[0073] Figure 26B This is a detailed top view of the gap area of ​​a touch panel in the related art. DETAILED DESCRIPTION

[0074] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0075] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0076] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0077] When describing some embodiments, the terms "electrically connected" and "connected" and their derivatives may be used. For example, the term "point connection" may be used to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein.

[0078] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0079] The use of "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0080] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0081] As used herein, "approximately" or "substantially" includes the stated value and an average value that is within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0082] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0083] With the rapid development of AMOLED (Active Matrix Organic Light-Emitting Diode) display devices, full screen, narrow frame, high resolution, rollable wearable, and foldable have become important development directions of AMOLED in the future.

[0084] Among them, the technology of directly making a touch structure (Flexible Metal Layer On Cell, FMLOC) on the encapsulation layer of an OLED (Organic Light-Emitting Diode) display panel can produce lighter and thinner touch panels, and this technology can be applied to foldable and rollable OLED display devices.

[0085] At the same time, in order to effectively utilize the screen space and increase the screen-to-body ratio (that is, the ratio of the area of ​​the display area actually used to display the image to the area of ​​the entire front of the display panel), punching technology is used in the OLED display panel to place functional devices such as cameras. This technology is called AA Hole (Active Area Hole) technology.

[0086] like Figure 26A and Figure 26B As shown, the touch panel 100' generally includes a plurality of evenly distributed touch electrodes (including a first touch electrode 11' and a second touch electrode 21'). Mutual capacitance can be generated between adjacent touch electrodes (i.e., between the first touch electrode 11' and the second touch electrode 21'). The mutual capacitance values ​​of these touch electrodes will change after being touched. By detecting the mutual capacitance values ​​and determining the change in the mutual capacitance values, the touch position can be determined.

[0087] The inventors of the present disclosure have discovered that by drilling holes (such as Figure 26A and Figure 26BThe technical solution of the mounting hole H' shown in the figure will destroy the integrity of the touch electrode of the touch structure at the punching position in the OLED display panel, especially when two mounting holes H' are set in the OLED display panel, the distance M' between the two mounting holes H' ranges from 900μm to 1200μm. Exemplarily, the distance M' between the two mounting holes H' ranges from 1000μm to 1100μm, for example, the distance M' is 1000μm, 1050μm, 1071μm, 1071.8μm, 1072μm, 1090μm or 1100μm. Because the distance M' between the two mounting holes H' is relatively close, the integrity of the touch electrodes in the gap region G' between the two mounting holes H' cannot be guaranteed. This results in the touch electrodes in the gap region G' having a smaller perimeter than those in the normal region. This, in turn, results in the touch electrodes in the gap region G' having a smaller facing area than those in the normal region. This results in a significant difference in the mutual capacitance generated by the touch electrodes in the gap region G' and the touch electrodes in the normal region after being touched. When a finger draws a line on the touch panel 100' through the gap region G' between the two mounting holes H', due to the smaller mutual capacitance of the touch electrodes in the gap region G', the drawn line may jitter, for example, bend, or even break in the gap region G', resulting in poor linearity of the drawn line on the touch panel 100'.

[0088] Based on this, Figure 1 As shown, some embodiments of the present disclosure provide a touch panel 100. The touch panel 100 has a touch area T; the touch panel 100 may also have a frame area B located around the touch area T.

[0089] The touch panel 100 can be stacked with a display panel to form a touch display device. The display panel can include mounting holes for functional components such as a camera. In this case, the touch area T of the touch panel 100 overlaps with the display area AA (also known as the active area) of the display panel. The touch area T has at least two mounting holes H, which correspond to the mounting holes in the display panel for functional components such as a camera.

[0090] In the description of this article, the area between two adjacent mounting holes H among the at least two mounting holes H may be referred to as a gap area G (refer to Figure 1 The area around the mounting hole H can be called the hole edge area KB (as shown in FIG. Figure 1(See the mesh-filled areas surrounding mounting holes H1 and H2 shown in FIG). It should be noted that the hole edge area KB referred to herein does not include the area surrounding mounting hole H that falls within the gap area G. Instead, it includes the area surrounding mounting hole H that does not fall within the gap area G. Within the touch area T, the area excluding the gap area G and hole edge area KB can be referred to as the normal area C.

[0091] In some embodiments, as Figure 1 As shown, the distance M between two adjacent mounting holes H on both sides of the gap area G ranges from 900 μm to 1200 μm; that is, the size range of the gap area G along the first direction X (that is, the arrangement direction of the two adjacent mounting holes H) is 900 μm to 1200 μm.

[0092] Exemplarily, the distance M between two adjacent mounting holes H located on both sides of the gap area G ranges from 1000 μm to 1100 μm, for example, the distance M is 1000 μm, 1050 μm, 1071 μm, 1071.8 μm, 1072 μm, 1090 μm or 1100 μm.

[0093] It should be noted that Figure 1 In the figure, only two mounting holes H are provided in the touch area T as an example for illustration. However, in the embodiment of the present disclosure, the number of mounting holes provided in the touch area T can be three or more, which can be set according to specific circumstances.

[0094] Figure 1 The location, size, and shape of the mounting hole H shown in the figure are for illustration only. Those skilled in the art should understand that the location, size, and shape of the mounting hole H in the embodiment of the present disclosure are not limited thereto, and can be adjusted accordingly based on the location, size, and shape of functional components such as the camera.

[0095] Figure 1 The relative sizes of the touch area T and the frame area B shown in FIG are for illustration only and are not intended to be limiting. In some embodiments, when the touch panel 100 is applied to a full-screen display device, the touch panel 100 may not be provided with the frame area B.

[0096] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 2 Shown Figure 1 The top view structure of the touch electrodes in the local area C' of the normal area C of the touch panel 100, Figure 3 Shown Figure 2 The touch panel 100 is a cross-sectional structure along the cross-sectional line AA′. The touch panel 100 includes a base substrate 1 and a touch function layer 2 disposed on the base substrate 1 .

[0097] like Figure 2 As shown, the touch function layer 2 includes a plurality of first touch units 10 extending along a first direction X and a plurality of second touch units 20 extending along a second direction Y. Each first touch unit 10 includes a plurality of first touch electrodes 11 arranged along the first direction X and connected in series with each other. Each second touch unit 20 includes a plurality of second touch electrodes 21 arranged along the second direction Y and connected in series with each other. Along the first direction X, every two adjacent first touch electrodes 11 are directly electrically connected. Each second touch unit 20 also includes a plurality of bridging structures (e.g., Figure 2 As shown in the first bridge structure 21A, along the second direction Y, every two adjacent second touch electrodes 21 are electrically connected via a bridge structure, so that the first touch electrodes 11 and the second touch electrodes 21 are insulated from each other.

[0098] The first direction X and the second direction Y are arranged to intersect, for example, the first direction X and the second direction Y may be perpendicular to each other. For example, the first direction X may be the horizontal direction of the touch display device, and the second direction Y may be the vertical direction of the touch display device; or the first direction X may be the row direction of the pixels arranged in the touch display device, and the second direction Y may be the column direction of the pixels arranged in the touch display device.

[0099] It should be noted that, in the multiple drawings of the present disclosure, only the first direction X is the horizontal direction and the second direction Y is the longitudinal direction for illustration. In the present disclosure, the technical solution obtained by rotating the drawings 90 degrees is also within the protection scope of the present disclosure.

[0100] Figure 2 The first touch electrodes 11 and the second touch electrodes 21 shown in the figure are in a rhombus or substantially rhombus shape. "Substantially rhombus shape" means that the touch electrodes (i.e., the first touch electrodes 11 and the second touch electrodes 21) are in a rhombus shape as a whole, but are not limited to a standard rhombus shape. For example, the boundaries of the touch electrodes may be non-linear (e.g., zigzag-shaped). For example, in the following embodiments, the touch electrodes may be in a rhombus shape as a whole, but their boundaries may be zigzag-shaped.

[0101] Furthermore, in the embodiment of the present disclosure, the electrode pattern shapes of the first touch electrodes 11 and the second touch electrodes 21 are not limited to diamond or substantially diamond shapes, and may also be rectangular, elongated, or the like, for example.

[0102] Figure 10 Shown Figure 1A partial enlarged view of the gap region G and hole edge region KB of the touch panel 100 in FIG. In the first touch unit 10 passing through the gap region G, the first touch electrode 11 located within the gap region G forms a first gap electrode 111 and a second gap electrode 112 arranged along a first direction X and electrically connected to each other. In the second touch unit 20 passing through the gap region G, the second touch electrode 21 located within the gap region G forms a third gap electrode 211 and a fourth gap electrode 212 arranged along a second direction Y and electrically connected to each other. Along the first direction X, the third gap electrode 211 is located between the first gap electrode 111 and the second gap electrode 112. Thus, both sides of the third gap electrode 211 face the first gap electrode 111 and the second gap electrode 112, thereby generating mutual capacitance.

[0103] Compared to Figure 26A and Figure 26B In the electrode arrangement structure shown, in the touch panel 100 provided by the above embodiment of the present disclosure, when the distance S between the two mounting holes H remains unchanged, the first gap electrode 111, the second gap electrode 112, the third gap electrode 211 and the fourth gap electrode 212 are arranged through the gap region G. Along the first direction X, the third gap electrode 211 is located between the first gap electrode 111 and the second gap electrode 112, so that the two sides of the third gap electrode 211 in the gap region G are opposite to the first gap electrode 111 and the second gap electrode 112, thereby increasing the contour perimeter of the first touch electrode 11 and the second touch electrode 21 in the region, thereby increasing the facing area between the first touch electrode 11 and the second touch electrode 21.

[0104] It can be seen that by adopting the above-described electrode arrangement structure in the gap region G, the contour perimeter of the first touch electrode 11 and the second touch electrode 21 in the region is increased, thereby increasing the facing area between the first touch electrode 11 and the second touch electrode 21, and further increasing the mutual capacitance between the first touch electrode 11 and the second touch electrode 21, thereby improving the problem of poor linearity of the lines in the gap region G of the touch panel 100.

[0105] Compared to Figure 26A and Figure 26B In the electrode arrangement structure shown, the perimeters of the first touch electrodes 11 and the second touch electrodes 21 are increased by 32% to 36%, for example, by 32%, 33%, 34%, 35% or 36%.

[0106] In the gap region G', the facing area between the first touch electrode 11' and the second touch electrode 21' is S'. In the above-mentioned electrode arrangement structure disclosed in the present invention, in the gap region G, the facing area between the first gap electrode 111 and the second gap electrode 112, and the facing area between the third gap electrode 211 and the fourth gap electrode 212, that is, the facing area S between the first touch electrode 11 and the second touch electrode 21, is greater than S', and the ratio of S to S' ranges from 1.1 to 1.5, for example, can be 1.1, 1.2, 1.3, 1.4 or 1.5.

[0107] In the gap region G', the ratio of the mutual capacitance between the first touch electrode 11' and the second touch electrode 21' to the mutual capacitance between the first touch electrode 11' and the second touch electrode 21' in the non-gap region is in the range of 0.35 to 0.4. In the above-mentioned electrode arrangement structure disclosed in the present invention, the mutual capacitance between the first gap electrode 111 and the second gap electrode 112, and the third gap electrode 211 and the fourth gap electrode 212 is C1. The mutual capacitance between the first touch electrode 11 and the second touch electrode 21 in the non-gap region is C2, and the ratio of C1 to C2 is in the range of 0.75 to 0.8, for example, 0.75, 0.76, 0.77, 0.79 or 0.8. It can be seen that compared with Figure 26A and Figure 26B In the electrode arrangement structure shown in the present disclosure, the mutual capacitance between the first touch electrode 11 and the second touch electrode 21 in the gap area is increased and is closer to the mutual capacitance between the first touch electrode 11 and the second touch electrode 21 in the non-gap area, thereby improving the problem of poor linearity of the lines in the gap area G of the touch panel 100.

[0108] In some embodiments, the ratio of the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212 to the sum of the areas of the first gap electrode 111 and the second gap electrode 112 is in the range of 1.2 to 1.4, for example, 1.2, 1.24, 1.3, 1.36 or 1.4.

[0109] By adjusting the proportional relationship between the sum of the areas of the first gap electrode 111 and the second gap electrode 112 and the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212, the area of ​​the first touch electrode 11 in the gap region G is increased, while the area of ​​the second touch electrode 21 is reduced, compared to the related art. This achieves the effect of reducing the difference between the sum of the areas of the first gap electrode 111 and the second gap electrode 112 and the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212. This helps to increase the facing area of ​​the first touch electrode 11 and the second touch electrode 21 in the gap region G.

[0110] For example, Figure 10 As shown, the ratio of the sum of the areas of the first gap electrode 111 and the second gap electrode 112 to the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212 is 1.2. That is, the sum of the areas of the first gap electrode 111 and the second gap electrode 112 is close to the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212.

[0111] By making the sum of the areas of the first gap electrode 111 and the second gap electrode 112 close to the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212, the areas of the first touch electrode 11 and the second touch electrode 21 in the gap region G are made close to each other, which helps to further increase the facing area of ​​the first touch electrode 11 and the second touch electrode 21.

[0112] In some embodiments, the ratio of the area of ​​the second touch electrodes 21 to the area of ​​the first touch electrodes 11 in the non-gap region is in a range of 0.9 to 1, such as 0.9, 0.92, 0.95, 0.98, or 1. That is, in the non-gap region, the areas of the second touch electrodes 21 and the first touch electrodes 11 are similar, approximately equal, or equal.

[0113] In some embodiments, as Figure 10 As shown, the two adjacent mounting holes H located on both sides of the gap region G are respectively a first mounting hole H1 and a second mounting hole H2, and the first mounting hole H1 and the second mounting hole H2 are arranged along the first direction X. The first gap electrode 111 is adjacent to a side of the first mounting hole H1 close to the gap region G, and the second gap electrode 112 is adjacent to a side of the second mounting hole H2 close to the gap region G.

[0114] In some embodiments, as Figure 10 As shown, the first gap electrode 111 and the second gap electrode 112 are electrically connected to form an integral electrode, and the third gap electrode 211 is embedded in the interior of the integral electrode formed by the electrical connection of the first gap electrode 111 and the second gap electrode 112, which can further increase the contour perimeter of the first touch electrode 11 and the second touch electrode 21 in the gap region G, thereby increasing the facing area between the first touch electrode 11 and the second touch electrode 21.

[0115] In some embodiments, as Figure 10As shown, the mutually adjacent contours of the third gap electrode 211 and the first gap electrode 111 complement each other, and the mutually adjacent contours of the third gap electrode 211 and the second gap electrode 112 complement each other. This can further increase the facing area between the first gap electrode 111 and the second gap electrode 112, and between the third gap electrode 211 and the fourth gap electrode 212, thereby increasing the facing area between the first touch electrode 11 and the second touch electrode 21, and further increasing the mutual capacitance between the first touch electrode 11 and the second touch electrode 21. For example, compared to the related art, the mutual capacitance in the present disclosure can be increased by 60% to 170%, for example, by 60%, 80%, 100%, 115%, 130%, 160%, or 170%.

[0116] In some embodiments, the profile of the first gap electrode 111 and / or the second gap electrode 112 is at least partially different from the profile of the first touch electrode 11 located in the non-gap area.

[0117] For example, Figure 10 , the profiles of the first gap electrode 111 and the second gap electrode 112 are shown, both of which differ at least in part from the profile of the first touch electrode 11 located in the non-gap region. For example, the profiles of the first gap electrode 111 and the second gap electrode 112 both have wavy and rectangular protrusions, while the profile of the first touch electrode 11 located in the non-gap region has stepped protrusions.

[0118] In some embodiments, as Figure 10 As shown, the average size of the first gap electrodes 111 along the second direction Y gradually decreases along the first direction X; and / or the average size of the second gap electrodes 112 along the second direction Y gradually decreases along a direction opposite to the first direction X.

[0119] In some embodiments, the profile of the third gap electrode 211 and / or the fourth gap electrode 212 is at least partially different from the profile of the second touch electrode 21 located in the non-gap area.

[0120] For example, Figure 10 Figure 2 shows the profiles of the third gap electrode 211 and the fourth gap electrode 212, both of which differ at least in part from the profile of the second touch electrode 21 located in the non-gap region. For example, the profile of the third gap electrode 211 includes protrusions of various shapes, including at least two of wavy, rectangular, trapezoidal, and triangular shapes. The profile of the fourth gap electrode 212 includes protrusions of various shapes, such as wavy and rectangular shapes. The profile of the second touch electrode 21 located in the non-gap region includes stepped protrusions.

[0121] Exemplarily, the height of the protrusion of the profile of the third gap electrode 211 ranges from 280μm to 400μm, for example, the height is 280μm, 300μm, 320μm, 350μm, 360μm or 390μm, 400μm; the width of the protrusion of the profile of the third gap electrode 211 ranges from 260μm to 300μm, for example, the width is 260μm, 270μm, 280μm, 290μm or 300μm.

[0122] In some embodiments, as Figure 13A As shown, the third gap electrode 211 includes a first portion 211A, a second portion 211B, and a third portion 211C that are connected together as a whole. The first portion 211A, the second portion 211B, and the third portion 211C are arranged sequentially along the second direction Y, from the third gap electrode 211 to the fourth gap electrode 212. The average dimensions of the first portion 211A and the third portion 211C along the first direction X are both smaller than the average dimensions of the second portion 211B along the first direction X.

[0123] That is, along the second direction Y, and in the direction from the third gap electrode 211 to the fourth gap electrode 212, the size of the third gap electrode 211 along the first direction X shows an overall trend of changing from small to large and then to small, wherein the change from small to large is beneficial to increasing the contour circumference of the third gap electrode 211, and the change from large to small is beneficial to bridging with the fourth gap electrode 212.

[0124] For example, Figure 13B As shown, the contours of the first portion 211A near the first gap electrode 111 and the contours near the second gap electrode 112 both have wavy protrusions. The wavy protrusions include multiple triangular protrusions. For example, the multiple triangular protrusions include: a first protrusion 211A1, a second protrusion 211A2, and a third protrusion 211A3, arranged in sequence along the second direction Y, from the third gap electrode 211 to the fourth gap electrode 212. The height of the multiple triangular protrusions along the first direction X ranges from 89.3 μm to 91.2 μm, such as 89.3 μm, 90.7 μm, 91.0 μm, or 91.2 μm. The length of the base of the multiple triangular protrusions along the second direction Y ranges from 180.0 μm to 206.9 μm, such as 180.0 μm, 192.0 μm, 200.7 μm, 202.8 μm, or 206.9 μm.

[0125] In some embodiments, as Figure 10 As shown, the average size of the fourth gap electrode 212 along the first direction X first decreases and then increases along the second direction Y.

[0126] In some embodiments, as Figure 11A and Figure 11BAs shown, the edge of at least one of the third gap electrode 211 and the fourth gap electrode 212 has at least one branch S, and the edge is close to at least one of the first gap electrode 11 and the second gap electrode 112. The at least one branch S extends into the gap electrode to which the edge is close, that is, the branch S extends into the first gap electrode 111 and / or the second gap electrode 112.

[0127] Through the above-described arrangement, the facing areas between the first gap electrodes 111, the second gap electrodes 112, the third gap electrodes 211, and the fourth gap electrodes 212 can be increased, thereby further increasing the mutual capacitance between the first touch electrodes 11 and the second touch electrodes 21 in the gap region G, thereby further improving the problem of poor linearity of the scribed lines in the gap region G of the touch panel 100.

[0128] For example, the third gap electrode 211 is provided with at least one branch S near the edge of the first gap electrode 111, and the at least one branch S extends into the interior of the first gap electrode 111. Figure 11A As shown, the third gap electrode 211 is provided with a branch S near the edge of the first gap electrode 111 ; in other embodiments, the third gap electrode 211 may also be provided with two or more branches S near the edge of the first gap electrode 111 .

[0129] For example, the third gap electrode 211 is provided with at least one branch S near the edge of the second gap electrode 112, and the at least one branch S extends into the interior of the second gap electrode 112. Figure 11A As shown, the third gap electrode 211 is provided with a branch S near the edge of the second gap electrode 112 ; in other embodiments, the third gap electrode 211 may also be provided with two or more branches S near the edge of the second gap electrode 112 .

[0130] The branch S may be provided at both the edge of the third gap electrode 211 close to the first gap electrode 111 and the edge of the third gap electrode 211 close to the second gap electrode 112 , or only at one of them.

[0131] like Figure 11A As shown, when at least one branch S is provided on the edge of the third gap electrode 211 close to the first gap electrode 111 and the second gap electrode 112, the number of branches S provided on the edge of the third gap electrode 211 close to the first gap electrode 111 and the number of branches S provided on the edge of the third gap electrode 211 close to the second gap electrode 112 can be equal; and, further, these branches S can be symmetrically provided relative to the bisector of the third gap electrode 211 along the second direction Y, which is beneficial to improving the accuracy of touch position detection.

[0132] like Figure 11BAs shown, the fourth gap electrode 212 is provided with a branch S near the edge of the first gap electrode 111, and the branch S extends into the first gap electrode 111; the fourth gap electrode 212 is provided with a branch S near the edge of the second gap electrode 112, and the branch S extends into the second gap electrode 112.

[0133] For example, the fourth gap electrode 212 is provided with at least one branch S near the edge of the first gap electrode 111, and the at least one branch S extends into the interior of the first gap electrode 111. Figure 11B As shown, the fourth gap electrode 212 is provided with a branch S near the edge of the first gap electrode 111 ; in other embodiments, the fourth gap electrode 212 may also be provided with two or more branches S near the edge of the first gap electrode 111 .

[0134] For example, the fourth gap electrode 212 is provided with at least one branch S near the edge of the second gap electrode 112, and the at least one branch S extends into the interior of the second gap electrode 112. Figure 11B As shown, the fourth gap electrode 212 is provided with a branch S near the edge of the second gap electrode 112 ; in other embodiments, the fourth gap electrode 212 may also be provided with two or more branches S near the edge of the second gap electrode 112 .

[0135] The edge of the fourth gap electrode 212 close to the first gap electrode 111 and the edge of the third gap electrode 211 close to the second gap electrode 112 may both be provided with branches S, or only one of them may be provided with the branch S.

[0136] like Figure 11B As shown, when at least one branch S is provided on the edge of the fourth gap electrode 212 close to the first gap electrode 111 and the second gap electrode 112, the number of branches S provided on the edge of the fourth gap electrode 212 close to the first gap electrode 111 and the edge of the fourth gap electrode 212 close to the second gap electrode 112 can be equal; and further, these branches S can be symmetrically arranged relative to the bisector of the fourth gap electrode 212 along the second direction Y, which is beneficial to improving the accuracy of touch position detection.

[0137] In some embodiments, as Figure 11A and Figure 11B As shown, the edges of the branches S provided in the third gap electrode 211 and the fourth gap electrode 212 can be in the shape of a broken line. The broken line-shaped branches S can further increase the facing area between adjacent gap electrodes, thereby further increasing the mutual capacitance between the first touch electrode 11 and the second touch electrode 21 in the gap region G, thereby improving the linearity of the ruled lines in the gap region G of the touch panel 100.

[0138] It should be noted that Figure 11A and Figure 11B The shapes and positions of the branches S of the third gap electrode 211 and the fourth gap electrode 212 shown in the figure are for illustration only. This document does not specifically limit the shape and position of the branches S. The branches S can be set at any position of the third gap electrode 211 and the fourth gap electrode 212 near the edge of the first gap electrode 111 and the second gap electrode 112, as long as the facing area between adjacent gap electrodes can be increased.

[0139] In some embodiments, the touch electrodes in the touch panel 100 employ a metal mesh structure. Compared to planar electrodes formed from ITO (Indium Tin Oxide), metal mesh touch electrodes have lower resistance and higher sensitivity, thereby improving the touch sensitivity of the touch panel 100. Furthermore, the metal mesh touch electrodes offer high mechanical strength, reducing the weight of the touch panel 100. When the touch panel 100 is used in a display device, the device can be made thinner and lighter.

[0140] It should be noted that the touch electrodes of the metal mesh structure described above include the first touch electrodes 11 and the second touch electrodes 21 in the touch panel 100. The first touch electrodes 11 include the first touch electrodes 11 in the normal area C, the first touch electrodes 11 in the gap area G used to form the first gap electrode 111 and the second gap electrode 112, and the first touch electrodes 11 in the hole-edge area KB used to form the hole-edge electrode. The second touch electrodes 21 include the second touch electrodes 21 in the normal area C, the second touch electrodes 21 in the gap area G used to form the third gap electrode 211 and the fourth gap electrode 212, and the second touch electrodes 21 in the hole-edge area KB used to form the hole-edge electrode.

[0141] In some embodiments, as Figure 12 As shown, the first touch electrode 11 and the second touch electrode 21 adopt a metal mesh structure. The metal meshes WD of the first touch electrode 11 and the second touch electrode 21 are provided in the touch electrode layer 2A. The metal mesh WD of the first touch electrode 11 is disconnected from the metal mesh WD of the second touch electrode 21, thereby isolating the first touch electrode 11 and the second touch electrode 21 from each other.

[0142] It should be noted that Figure 12 The metal mesh WD is filled with different patterns in order to distinguish different touch electrodes. The metal meshes WD of the first touch electrode 11 and the second touch electrode 21 can be made of the same material and formed using the same process.

[0143] like Figure 13AAs shown, in the gap region G, the first gap electrode 111, the second gap electrode 112, the third gap electrode 211, and the fourth gap electrode 212 employ a metal mesh structure. In some embodiments, the line width of the metal mesh WD in the gap region G can be greater than the line width of the metal mesh WD in the normal region C. This compensates for the electrode area of ​​the first touch electrode 11 and the second touch electrode 21 in the gap region G, increases the area of ​​the electrodes transmitting touch signals in the first touch electrode 11 and the second touch electrode 21 in the gap region G, and increases the mutual capacitance between the first touch electrode 11 and the second touch electrode 21. This further improves the linearity problem of the scribe lines in the gap region G of the touch panel 100.

[0144] It should be noted that when the line width of the metal grid WD located in the gap area G is greater than the line width of the metal grid WD in the normal area C, the mesh area of ​​the metal grid WD located in the gap area G is smaller than the mesh area of ​​the metal grid WD in the normal area C.

[0145] For example, the line width of the metal mesh WD in the normal region C is 2.8 μm to 4.2 μm, for example, 2.8 μm, 3.0 μm, 3.5 μm, 3.8 μm, 4.0 μm, or 4.2 μm. The line width of the metal mesh WD in the gap region G is 3.8 μm to 5.2 μm, for example, 3.8 μm, 4.0 μm, 4.5 μm, 4.8 μm, 5.0 μm, or 5.2 μm.

[0146] In some embodiments, as Figure 14B As shown, in each touch unit passing through the first mounting hole H1 and the second mounting hole H2, each touch electrode located in the hole edge area KB forms a hole edge electrode K. Since a portion of the hole edge electrode K is missing at the position of the mounting hole H, the area of ​​a single hole edge electrode K is smaller than the area of ​​a single touch electrode located in the normal area C.

[0147] It should be noted that Figure 14B Only a portion of the hole-edge electrodes K are shown for illustration purposes. It should be understood that in each touch unit passing through at least two mounting holes H, each touch electrode located in the hole-edge area KB forms a hole-edge electrode K, with multiple hole-edge electrodes K distributed around the mounting hole H. In the hole-edge area KB, because the area of ​​the hole-edge electrodes K is smaller than that of the touch electrodes in the normal area C, the mutual capacitance generated by the hole-edge electrodes K in the hole-edge area KB differs from that generated by the touch electrodes in the normal area C. When a finger draws a line on the touch panel 100 through the hole-edge area KB, the line may jitter, for example, bend or even break, resulting in poor linearity of the line drawn on the touch panel 100.

[0148] Based on this, in some embodiments, the line width of the metal mesh WD of the hole edge electrode K in the hole edge area KB is greater than the line width of the metal mesh WD of the touch electrode in the normal area C, so that the electrode area of ​​the hole edge electrode K in the hole edge area KB can be compensated, and the area of ​​the electrode transmitting the touch signal in the hole edge electrode K in the hole edge area KB is increased, so that the mutual capacitance value that can be generated by the hole edge electrode K in the hole edge area KB is increased, thereby improving the problem of poor linearity of the scribing in the hole edge area KB of the touch panel 100.

[0149] Furthermore, the line width of the metal mesh WD in the hole edge region KB may be made equal to the line width of the metal mesh WD in the gap region G.

[0150] In some embodiments, in the gap region G, a compensation sub-electrode is disposed near the corresponding mounting hole H in the gap electrodes (the gap electrodes include the first gap electrode 111, the second gap electrode 112, the third gap electrode 211, and the fourth gap electrode 212). The compensation sub-electrode is a planar electrode electrically connected to the rest of the gap electrodes. It should be noted that the so-called "corresponding mounting hole" refers to the mounting hole H to which the gap electrode is closest.

[0151] By providing the compensation sub-electrodes, the electrode area of ​​the gap electrodes for transmitting touch signals can be increased, thereby increasing the mutual capacitance value between the gap electrodes in the gap region G.

[0152] Furthermore, the compensation sub-electrode is disposed closest to the mounting hole H. When the touch panel 100 is applied to a display device, it is possible to avoid the planar compensation sub-electrode blocking light and affecting the display effect.

[0153] For example, Figure 16 As shown, the first gap electrode 111 includes a first main sub-electrode 111S and a first compensation sub-electrode MD1 disposed near the first mounting hole H1. The first main sub-electrode 111S is a metal mesh structure, and the first compensation sub-electrode MD1 is a planar electrode. The first main electrode 111S and the first compensation sub-electrode MD1 are electrically connected.

[0154] The second gap electrode 112 includes a second main sub-electrode 112S and a second compensation sub-electrode MD2 disposed near the second mounting hole H2. The second main sub-electrode 112S is a metal mesh structure, and the second compensation sub-electrode MD2 is a planar electrode. The second main electrode 112S and the second compensation sub-electrode MD2 are electrically connected.

[0155] It should be noted that Figure 16The figure only shows the case where compensation sub-electrodes are provided in both the first gap electrode 111 and the second gap electrode 112. However, the embodiments of the present disclosure are not limited to this. In other embodiments, compensation sub-electrodes may be provided in the first gap electrode 111, while compensation sub-electrodes are not provided in the second gap electrode 112; or compensation sub-electrodes may not be provided in the first gap electrode 111, while compensation sub-electrodes are provided in the second gap electrode 112.

[0156] The ratio of the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212 to the sum of the area of ​​the metal grid of the first main sub-electrode 111S, the area of ​​the first compensation sub-electrode MD1, the area of ​​the metal grid of the second main sub-electrode 112S and the area of ​​the second compensation sub-electrode MD2 is less than 1.3 and greater than or equal to 1. For example, the ratio may be 1, 1.05, 1.1, 1.15 or 1.2.

[0157] By electrically connecting the first main sub-electrode 111S to the first compensation sub-electrode MD1 and the second main electrode 112S to the second compensation sub-electrode MD2, the areas of the first gap electrode 111 and the second gap electrode 112 are further increased, and the difference between the sum of the areas of the first gap electrode 111 and the second gap electrode 112 and the sum of the areas of the third gap electrode 211 and the fourth gap electrode 212 is reduced, which is beneficial to increasing the facing area of ​​the first touch electrode 11 and the second touch electrode 21 in the gap area G.

[0158] The sum of the area of ​​the metal mesh of the first main sub-electrode 111S included in the first gap electrode 111 and the area of ​​the planar electrode of the first compensation sub-electrode MD1 accounts for a proportion of the area of ​​the metal mesh of the first touch electrode 11 located in the normal area C in the range of 65% to 100%, for example, 65%, 70%, 80%, 90% or 100%.

[0159] When the first gap electrode 111 includes a first main sub-electrode 111S and a first compensation sub-electrode MD1, the area range of the metal grid of the first main sub-electrode 111S is 8.0×106μm2~1.0×107μm2, for example, 8.0×106μm2, 8.5×106μm2, 9.0×106μm2, 9.04×106μm2 or 1.0×107μm2; the area range of the planar electrode of the first compensation sub-electrode MD1 is 2.0×105μm2~4.0×105μm2, for example, 2.0×105μm2, 2.5×105μm2, 3.0×105μm2, 3.8×105μm2 or 4.0×105μm2.

[0160] In the case where the second gap electrode 112 includes a second main sub-electrode 112S and a second compensation sub-electrode MD2, the sum of the area of ​​the metal grid of the second main sub-electrode 112S included in the second gap electrode 112 and the area of ​​the planar electrode of the second compensation sub-electrode MD2 accounts for a proportion of the area of ​​the metal grid of the second touch electrode 21 in the normal area C in the range of 65% to 100%, for example, 65%, 70%, 80%, 90% or 100%.

[0161] When the second gap electrode 112 includes a second main sub-electrode 112S and a second compensation sub-electrode MD2, the area range of the metal grid of the second main sub-electrode 112S is 7.0×106μm2 to 9.0×106μm2, for example, 7.0×106μm2, 7.76×106μm2, 8.0×106μm2 or 9.0×106μm2; the area range of the planar electrode of the second compensation sub-electrode MD2 is 2.0×105μm2 to 3.0×105μm2, for example, 2.0×105μm2, 2.3×105μm2, 2.5×105μm2, 2.8×105μm2 or 3.0×105μm2.

[0162] It should be noted that “the area of ​​the metal mesh of the first main sub-electrode 111S” refers to the area of ​​the region enclosed by the outline of the metal mesh of the first main electrode 111S; similarly, the area of ​​the metal mesh of the second main electrode 112S is also the same.

[0163] In some embodiments, the hole edge electrode K located in the hole edge area KB includes: a main sub-electrode and a compensation sub-electrode disposed near the corresponding mounting hole H. It should be noted that the so-called "corresponding mounting hole" refers to the mounting hole H that the hole edge electrode K is closest to.

[0164] The main sub-electrode of the hole edge electrode K can be a metal grid structure, and the compensation sub-electrode of the hole edge electrode K can be a planar electrode. The main sub-electrode and the compensation sub-electrode are electrically connected, so that the electrode area for transmitting the touch signal of the hole edge electrode K can be compensated, and the mutual capacitance value between the hole edge electrodes K in the hole edge area KB can be increased, thereby further improving the accuracy of touch position sensing in the hole edge area KB and improving the linearity of the marking.

[0165] When the touch panel 100 is rectangular, due to the difference in length between the long side and the short side, the electrode area of ​​the touch unit extending along the long side is larger than the electrode area of ​​the touch unit extending along the short side. This will affect the mutual capacitance value generated between the touch unit extending along the long side and the touch unit extending along the short side, thereby affecting the accuracy of touch position sensing.

[0166] Based on this, in some embodiments, dummy electrodes disconnected from the touch electrodes are provided in the touch electrodes of the touch cells extending along the long side. The dummy electrodes are not electrically connected to the touch electrodes and therefore do not transmit touch signals. This reduces the electrode area used for signal transmission in the touch cells extending along the long side. This reduces the difference between the electrode area used for signal transmission in the touch cells extending along the long side and the electrode area used for signal transmission in the touch cells extending along the short side, and can even make the two equal or approximately equal. This avoids the problem of differences in electrode area used for signal transmission between touch cells extending in different directions in the touch panel 100, which affects the mutual capacitance between different touch cells, thereby improving the accuracy of touch position sensing.

[0167] For example, Figure 10 、 Figure 12 and Figure 14B As shown, when the touch panel 100 is rectangular, with the first direction X being the short side direction and the second direction Y being the long side direction, a dummy electrode DM is provided in the second touch electrode 21 extending along the second direction Y, disconnected from the metal mesh WD used for signal transmission. The dummy electrode DM may also be formed of a metal mesh structure, for example, to ensure display uniformity of a display device using the touch panel 100.

[0168] In other embodiments, when the touch panel 100 is rectangular, the first direction X is the long side direction, and the second direction Y is the short side direction, the first touch electrodes 11 extending along the first direction X are provided with dummy electrodes DM disconnected from the metal mesh WD for transmitting signals.

[0169] Refer to the following Figure 14B The connection relationship between the touch electrodes in the hole edge area KB and the gap area G is introduced.

[0170] In some embodiments, as Figure 14B As shown, along the first direction X, in the first touch unit 10 passing through the first mounting hole H1 and the second mounting hole H2, the first touch electrode 11 located on the side of the first mounting hole H1 away from the second mounting hole H2 forms a fifth hole-edge electrode 113, and the first touch electrode 11 located on the side of the second mounting hole H2 away from the first mounting hole H1 forms a sixth hole-edge electrode 114.

[0171] In the second touch unit 20 passing through the first mounting hole H1, the two second touch electrodes 21 located on either side of the first mounting hole H1 along the second direction Y respectively form a first hole-edge electrode 213 and a second hole-edge electrode 214. In the second touch unit 20 passing through the second mounting hole H2, the two second touch electrodes 21 located on either side of the second mounting hole H2 along the second direction Y respectively form a third hole-edge electrode 215 and a fourth hole-edge electrode 216.

[0172] In some embodiments, as Figure 14B As shown, the first hole-edge electrode 213 , the third gap electrode 211 , the fourth gap electrode 212 and the second hole-edge electrode 214 are electrically connected in sequence, so that the second touch unit 20 extending along the second direction Y can be electrically connected.

[0173] Among them, such as Figure 15 As shown, the first hole-side electrode 213 and the third gap electrode 211 can be directly electrically connected, for example, the two can form an integrated structure.

[0174] like Figure 14B As shown, the fourth gap electrode 212 and the second hole-edge electrode 214 can be directly electrically connected, for example, the two can form an integrated structure.

[0175] like Figure 14B and Figure 17 As shown, the third hole edge electrode 215 and the fourth hole edge electrode 216 are electrically connected via a first connecting wire L1 , which extends along the contour of the second mounting hole H2 , thereby electrically connecting the second touch unit 20 extending along the second direction Y.

[0176] like Figure 14B and Figure 18 As shown, the first gap electrode 111 and the fifth hole edge electrode 113 are electrically connected via a second connecting wire L2, and the second connecting wire L2 extends along the outline of the first mounting hole H1; Figure 14B and Figure 17 As shown, the second gap electrode 112 and the sixth hole edge electrode 114 are electrically connected via a third connecting wire L3 , which extends along the contour of the second mounting hole H2 , thereby electrically connecting the first touch unit 10 extending along the first direction X.

[0177] Based on the above structure, the first connecting wire L1 and the third connecting wire L3 are arranged at positions where they intersect. Figure 3 The first connecting wire L1 and the third connecting wire L3 are located in different layers in the touch function layer 2 at least at the intersection position, that is, at the intersection position, one of the first connecting wire L1 and the third connecting wire L3 is located in the touch electrode layer 2A in the touch function layer 2, and the other is located in the bridging structure layer 2C in the touch function layer 2, and the first connecting wire L1 and the third connecting wire L3 are separated by the insulating layer 2B in the touch function layer 2 at the intersection position to prevent crosstalk between the touch signals transmitted on the first connecting wire L1 and the third connecting wire L3.

[0178] Exemplarily, the first connecting wire L1 is arranged in the bridging structure layer 2C, and the first connecting wire L1 passes through different vias 2BK in the insulating layer 2B and is electrically connected to the third hole edge electrode 215 and the fourth hole edge electrode 216 respectively; the third connecting wire L3 is arranged in the touch electrode layer 2A, and the third connecting wire L3 is directly electrically connected to the sixth hole edge electrode 114 and the second gap electrode 112.

[0179] Exemplarily, the first connecting wire L1 is arranged in the touch electrode layer 2A, and the first connecting wire L1 is directly electrically connected to the third hole edge electrode 215 and the fourth hole edge electrode 216; the third connecting wire L3 is arranged in the bridging structure layer 2C, and the third connecting wire L3 passes through different vias 2BK in the insulating layer 2B and is electrically connected to the sixth hole edge electrode 114 and the second gap electrode 112 respectively.

[0180] In some embodiments, the second connecting wire L2 can be disposed in the touch electrode layer 2A or in the bridging structure layer 2C. When the second connecting wire L2 is disposed in the touch electrode layer 2A, the second connecting wire L2 is directly electrically connected to the fifth hole-edge electrode 113 and the first gap electrode 111. When the second connecting wire L2 is disposed in the bridging structure layer 2C, the second connecting wire L2 passes through different vias 2BK in the insulating layer 2B to electrically connect to the first gap electrode 111 and the fifth hole-edge electrode 113, respectively.

[0181] The first hole-edge electrode 213, the third gap electrode 211, the fourth gap electrode 212, and the second hole-edge electrode 214 are electrically connected to form a whole, which is insulated from the third hole-edge electrode 215, the fourth hole-edge electrode 216, and the first connecting wire L1. The whole is thus insulated from each other, so that the different touch control units to which they belong are insulated from each other.

[0182] like Figure 19 As shown, in the gap region G, the first gap electrode 111 is electrically connected to the second gap electrode 112, and the third gap electrode 211 is electrically connected to the fourth gap electrode 212. There is an intersection at the position where the first gap electrode 111 is electrically connected to the second gap electrode 112 and the third gap electrode 211 is electrically connected to the fourth gap electrode 212. Since the entirety formed by the electrical connection of the first gap electrode 111 and the second gap electrode 112 belongs to the first touch unit 10, and the entirety formed by the electrical connection of the third gap electrode 211 and the fourth gap electrode 212 belongs to the second touch unit 20, the signals transmitted on the first touch unit 10 and the second touch unit 20 are different. Therefore, the entirety formed by the electrical connection of the first gap electrode 111 and the second gap electrode 112 and the entirety formed by the electrical connection of the third gap electrode 211 and the fourth gap electrode 212 need to be insulated.

[0183] In some embodiments, see Figure 14AThe third gap electrode 211 and the fourth gap electrode 212 are electrically connected via a bridge structure located within the gap region G. In the second touch unit 20 , which passes through the gap region G, a line F connecting the center Z1 of any bridge structure (the first bridge structure 21A) located within the non-gap region and the center Z2 of the bridge structure (the gap bridge structure 20A) connecting the third gap electrode 211 and the fourth gap electrode 212 intersects the second direction Y, electrically connecting the third gap electrode 211 and the fourth gap electrode 212.

[0184] Compared to Figure 26A The bridging structures 21A' in the touch sensing unit 20 are all arranged along the second direction Y'. In the above embodiment of the present disclosure, in the second touch sensing unit 20 passing through the gap region G, a line F connecting the center Z1 of any bridging structure (the first bridging structure 21A) located in the non-gap region and the center Z2 of the bridging structure (the gap bridging structure 20A) for connecting the third gap electrode 211 and the fourth gap electrode 212 intersects the second direction Y, thereby achieving electrical connection between the third gap electrode 211 and the fourth gap electrode 212 while satisfying the design of the electrode arrangement structure described above in the gap region G.

[0185] In some embodiments, as Figure 3 As shown, the touch function layer 2 includes a touch electrode layer 2A, an insulating layer 2B and a bridging structure layer 2C stacked on the base substrate 1, the insulating layer 2B is located between the touch electrode layer 2A and the bridging structure layer 2C, and the bridging structure layer 2C is located on the side of the touch electrode layer 2A close to or away from the base substrate 1. Figure 3 The diagram shows a situation where the bridging structure layer 2C is located on the side of the touch electrode layer 2A away from the base substrate 1 .

[0186] like Figure 4 As shown, the first touch electrodes 11 and the second touch electrodes 21 are arranged in the touch electrode layer 2A. Along the first direction X, every two adjacent first touch electrodes 11 are directly electrically connected. Along the second direction Y, every two adjacent second touch electrodes 21 are arranged independently of each other.

[0187] like Figure 3 As shown, the insulating layer 2B has a plurality of via holes 2BK.

[0188] like Figure 5 As shown, each second touch unit 20 includes a plurality of bridge structures (ie, first bridge structures 21A) disposed in the bridge structure layer 2C. Figure 2 and Figure 3As shown, along the second direction Y, every two adjacent second touch electrodes 21 pass through different via holes 2BK in the insulating layer 2B and are electrically connected to a first bridge structure 21A respectively, thereby achieving electrical connection of the second touch electrodes 21 included in the second touch unit 20 along the second direction Y.

[0189] It should be noted that Figures 2 to 5 The example in which the bridging structure layer 2C is located on the side of the touch electrode layer 2A away from the base substrate 1 is used for illustration only. However, the disclosed embodiments are not limited thereto. In other embodiments, in the touch function layer 2 of the touch panel 100, the bridging structure layer 2C is located on the side of the touch electrode layer 2A closer to the base substrate 1.

[0190] For the case where any two first touch electrodes 11 in the first touch unit 10 are directly electrically connected, any two second touch electrodes 21 in the second touch unit 20 can be electrically connected via a first bridge structure 21A, such as Figure 5 As shown, each first bridge structure 21A may extend along the second direction Y so as to connect the two second touch electrodes 21 on both sides thereof.

[0191] In other embodiments, Figures 6 to 9 As shown, in the touch panel 100 , any two adjacent second touch electrodes 21 in the second touch unit 20 may be directly electrically connected, and any two adjacent first touch electrodes 11 in the first touch unit 10 may be electrically connected via a second bridge structure 11A provided in the bridge structure layer 2C′.

[0192] For example, Figure 7 and Figure 8 As shown, the first touch electrodes 11 and the second touch electrodes 21 are arranged in the touch electrode layer 2A'. Along the second direction Y, every two adjacent second touch electrodes 21 are directly electrically connected; along the first direction X, every two adjacent first touch electrodes 11 are arranged independently of each other.

[0193] like Figure 7 As shown in FIG. 1 , the insulating layer 2B has a plurality of via holes 2BK. Figure 9 As shown, each first touch unit 10 includes a plurality of bridge structures (second bridge structures 11A) disposed in the bridge structure layer 2C'. Figure 6 and Figure 7 As shown, along the first direction X, every two adjacent first touch electrodes 11 pass through different via holes 2BK and are electrically connected to one second bridge structure 11A respectively, thereby achieving electrical connection of the first touch unit 10 along the first direction X.

[0194] In the above embodiment, each second bridging structure 11A may extend along the first direction X so as to connect the two first touch electrodes 11 on both sides thereof.

[0195] It should be noted that Figures 6 to 9 The example in which the bridging structure layer 2C' is located on the side of the touch electrode layer 2A' closer to the base substrate 1 is used for illustration only. However, the embodiments of the present disclosure are not limited thereto. In other embodiments, in the touch function layer 2 of the touch panel 100, the bridging structure layer 2C' is located on the side of the touch electrode layer 2A' farther from the base substrate 1.

[0196] In the above-mentioned embodiments of the present disclosure, in the touch electrode layer, one of the first touch electrodes 11 and the second touch electrodes 21 is directly electrically connected to each other, and the other touch electrodes are electrically connected via a bridge structure formed by a bridging structure and the vias 2BK in the insulating layer 2B. This ensures that the first touch electrodes 11 and the second touch electrodes 21 remain insulated from each other while forming a plurality of touch units along the first direction X and the second direction Y.

[0197] It should be noted that, in the touch area T of the touch panel 100, Figures 2 to 9 Only the arrangement and connection structure of the touch electrodes in the local area C' of the normal area C are shown. In the normal area C, other areas except the local area C' also adopt the same arrangement and connection structure of the touch electrodes as the local area C'.

[0198] Figure 3 and Figure 7 The structure of the touch panel 100 shown in the figure is for illustration only. When the touch electrode layer is closer to the base substrate 1 than the bridging structure layer, other film layers, such as an insulating layer and a planarizing layer, may be further included between the touch electrode layer and the base substrate 1; when the bridging structure layer is closer to the base substrate 1 than the touch electrode layer, other film layers, such as an insulating layer and a planarizing layer, may be further included between the bridging structure layer and the base substrate 1, which will not be described in detail here.

[0199] It should be noted that the base substrate 1 in the touch panel 100 can be a blank substrate. For example, when the touch panel 100 is integrated with a display panel in an on-cell manner, the touch function layer 2 can be directly fabricated on a blank substrate to form the touch panel 100, and then the touch panel 100 and the display panel can be laminated.

[0200] The base substrate 1 in the touch panel 100 can also be a substrate on which some functional devices, pixel circuits, or thin films are fabricated. For example, when using FMLOC technology to integrate a touch structure on a display panel, the touch function layer 2 can be directly fabricated on the encapsulation layer of the display panel. In this case, the entire substrate on which the pixel circuits, the film layer of the light-emitting device, and the encapsulation layer are fabricated can be considered the base substrate 1 of the touch panel 100.

[0201] In some embodiments, as Figure 19 and Figure 20 As shown, the first gap electrode 111 is directly electrically connected to the second gap electrode 112, and the third gap electrode 211 and the fourth gap electrode 212 are electrically connected to the gap bridging structure 20A provided in the bridging structure layer 2C through the via hole 2BK opened in the insulating layer 2B, thereby realizing the electrical connection between the third gap electrode 211 and the fourth gap electrode 212.

[0202] On this basis, for example, in order to improve the conductivity of the electrical connection between the third gap electrode 211 and the gap bridging structure 20A and reduce the loss of signals transmitted between the gap bridging structure 20A and the third gap electrode 211, a plurality of vias 2BK can be set at the position where the gap bridging structure 20A and the third gap electrode 211 are electrically connected, so that the gap bridging structure 20A and the third gap electrode 211 are electrically connected through the plurality of vias 2BK, thereby increasing the contact area between the two and achieving the effect of improving the conductivity of the electrical connection between the two.

[0203] Furthermore, the plurality of vias 2BK for electrically connecting the gap bridging structure 20A and the third gap electrode 211 may be arranged in a row ( Figure 19 and Figure 20 ), or arranged in multiple rows.

[0204] Similar to the above embodiment, in order to improve the conductivity of the electrical connection between the fourth gap electrode 212 and the gap bridging structure 20A and reduce the loss of signals transmitted between the gap bridging structure 20A and the fourth gap electrode 212, a plurality of vias 2BK can be provided at the position where the gap bridging structure 20A and the fourth gap electrode 212 are electrically connected, so that the gap bridging structure 20A and the fourth gap electrode 212 are electrically connected through the plurality of vias 2BK, thereby increasing the contact area between the two and achieving the effect of improving the conductivity of the electrical connection between the two.

[0205] Furthermore, the plurality of vias 2BK for electrically connecting the gap bridging structure 20A and the fourth gap electrode 212 may be arranged in a row ( Figure 19 and Figure 20 ), or arranged in multiple rows.

[0206] It should be noted that Figure 19 and Figure 20In the example, the first gap electrode 111 and the second gap electrode 112 are directly electrically connected, and the third gap electrode 211 and the fourth gap electrode 212 are electrically connected via the gap bridging structure 20A. However, the embodiments of the present disclosure are not limited thereto. In some other embodiments, the third gap electrode 211 and the fourth gap electrode 212 may be directly electrically connected, and the first gap electrode 111 and the second gap electrode 112 may be electrically connected via the gap bridging structure 20A.

[0207] It should be understood that the shape of the gap bridging structure 20A can be arbitrarily set as needed.

[0208] In some embodiments, as Figure 19 and Figure 20 As shown, at the intersection of the structure formed by the electrical connection of the first gap electrode 111 and the second gap electrode 112 and the structure formed by the electrical connection of the third gap electrode 211 and the fourth gap electrode 212, the gap bridging structure 20A is provided with a hollow portion 20A' at the intersection, which is used to directly electrically connect the positive projection of the conductive pattern of the first gap electrode 111 and the second gap electrode 112 on the base substrate 1, and at least partially overlaps with the positive projection of the hollow portion 20A' of the gap bridging structure 20A on the base substrate 1.

[0209] In the above embodiment, the provision of the hollow portion 20A′ can reduce the overlapping area of ​​the portion where the gap bridging structure 20A is connected to the first gap electrode 111 and the second gap electrode 112, thereby reducing the parasitic capacitance generated by the portion where the gap bridging structure 20A is connected to the first gap electrode 111 and the second gap electrode 112.

[0210] Figure 21 Shown Figure 14B The local enlarged structure of the area shown in the dotted box E2, Figure 22 Shown Figure 14B The partially enlarged structure of the area shown in the dotted box E3. In some embodiments, Figure 21 and Figure 22 As shown, the touch function layer 2 further includes: a light blocking portion D, at least one connecting wire L, a signal shielding portion P and an electrode line X.

[0211] The light-blocking portion D is disposed at the edge of the mounting hole H and extends along the edge of the mounting hole H to form a closed loop structure, thereby preventing light passing through the mounting hole H from entering the area surrounding the mounting hole H. Since the area surrounding the mounting hole H is where images are displayed when the touch panel 100 and the display panel are integrated together, the light-blocking portion D prevents light passing through the mounting hole H from entering the area surrounding the mounting hole H, thereby preventing this light from entering the display area and affecting display quality.

[0212] For example, Figure 23A As shown, the light-blocking portion D is a single-layer closed-loop structure, that is, the light-blocking portion D includes a complete circle structure, which is simple in structure and easy to prepare.

[0213] For example, Figure 23B As shown, the light blocking portion D may also be a double-layer closed-loop structure, that is, the light blocking portion D includes two complete ring structures, which increases the blocking area of ​​the light blocking portion D, thereby facilitating improving the light blocking effect of the light blocking portion D.

[0214] For example, Figure 23C As shown, the light shielding portion D can also be a ring structure with alternating single and double layers. In this case, the light shielding portion D includes an inner ring structure D1 and an outer ring structure D2, both of which are intermittently arranged. Along the edge of the mounting hole H, the overlapping portion of the inner ring structure D1 and the outer ring structure D2 forms a double-layer structure, and the non-overlapping portion forms a single-layer structure. Alternatively, the inner ring structure D1 and the outer ring structure D2 do not overlap. In this case, as shown in FIG. Figure 23D As shown, along the edge of the mounting hole H, the light blocking portion D is a single-layer ring structure.

[0215] In some embodiments, the width of the light blocking portion D ranges from 60 μm to 100 μm, for example, 60 μm, 68 μm, 80 μm, 90 μm, 92 μm, or 100 μm.

[0216] For example, when the line width of the metal mesh WD in the gap region G is 4 μm, the ratio of the width of the light blocking portion D to the line width of the metal mesh WD in the gap region G is in the range of 15 to 25, for example, 15, 17, 20, 23 or 25.

[0217] For example, when the line width of the metal mesh WD located in the gap region G is 5 μm, the ratio of the width of the light blocking portion D to the line width of the metal mesh WD located in the gap region G is in the range of 12 to 20, for example, 12, 13.6, 16, 18, 18.4 or 20.

[0218] The at least one connecting wire L is disposed on a side of the light shielding portion D away from the mounting hole H and extends along the contour of the mounting hole H. The connecting wire L is used to electrically connect two adjacent first touch electrodes 11 arranged along the first direction X, or to electrically connect two adjacent second touch electrodes 21 arranged along the second direction Y. The at least one connecting wire L includes at least one of the first connecting wire L1, the second connecting wire L2, and the third connecting wire L3 described above.

[0219] Figure 21 In the figure, a connecting wire L is provided on a side of the light shielding portion D away from the second mounting hole H2 as an example for illustration. Figure 22Here, an example is given in which three connecting wires L are arranged on a side of the light shielding portion D away from the first mounting hole H1.

[0220] It should be noted that Figure 21 and Figure 22 The figure shows a case where the connecting wire L includes a first connecting wire L1, a second connecting wire L2 and a third connecting wire L3. The arrangement positions of the first connecting wire L1, the second connecting wire L2 and the third connecting wire L3 in the touch function layer 2, and the manner in which they are electrically connected to the touch electrodes can be referred to the corresponding embodiments above and will not be repeated here.

[0221] In some embodiments, the width of the connecting wire L ranges from 20 μm to 60 μm, for example, 20 μm, 30 μm, 40 μm, 50 μm, or 60 μm.

[0222] For example, when the line width of the metal mesh WD in the gap region G is 4 μm, the ratio of the width of the connecting wire L to the line width of the metal mesh WD in the gap region G is in the range of 5 to 15, for example, 5, 7.5, 10, 12.5 or 15.

[0223] Exemplarily, when the line width of the metal mesh WD in the gap region G is 5 μm, the ratio of the width of the connecting wire L to the line width of the metal mesh WD in the gap region G is in the range of 4 to 12, for example, 4, 6, 8, 9, 10 or 12.

[0224] In some embodiments, as Figure 21 and Figure 22 As shown, an electrode wire X is provided at the edge of the touch electrode near the mounting hole H. The electrode wire X is electrically connected to the touch electrode and extends along the outline of the mounting hole H. The electrode wire X is a planar electrode whose width can be greater than the width of the mesh lines of the metal mesh of the touch electrode. Thus, when it is necessary to electrically connect the touch electrode to the connecting wire L, the electrode wire X can be used to achieve the electrical connection between the touch electrode and the connecting wire L. Compared to directly connecting the touch electrode of the metal mesh structure to the connecting wire L, this connection method can improve the electrical conductivity between the touch electrode and the connecting wire L, thereby increasing the transmission rate of the touch signal.

[0225] The electrode lines X may be made of the same material as the touch electrodes and provided in the same layer, so that the electrode lines X can be directly electrically connected to the touch electrodes.

[0226] On this basis, when the touch electrode and the connecting wire L to which it is connected are located in different layers, electrode lines are provided to directly electrically connect the touch electrode to the electrode line X, which is then electrically connected to the connecting wire L via the via 2BK. This allows for electrical connection between the touch electrode and the connecting wire L. Therefore, compared to the metal mesh structure where the touch electrode is electrically connected to the connecting wire L via a via, the planar electrode structure where the connecting wire L is electrically connected to the connecting wire L via the via 2BK improves the alignment accuracy between the electrode line X connected to the touch electrode and the via 2BK, thereby improving the conductivity of the electrical connection between the touch electrode and the connecting wire L.

[0227] For example, Figure 21 As shown, a first electrode line X1 is provided on the edge of the second gap electrode 112 near the second mounting hole H2. The first electrode line X1 is electrically connected to the second gap electrode 112. The first electrode line X1 and the third connecting wire L3 are electrically connected to the bridge structure in the bridge structure layer 2C through the via 2BK opened in the insulating layer 2B, thereby achieving electrical connection between the second gap electrode 112 and the sixth hole-edge electrode 114. A second electrode line X2 is provided on the edge of the fourth hole-edge electrode 216 near the second mounting hole H2. The second electrode line X2 is electrically connected to the fourth hole-edge electrode 216. The second electrode line X2 is directly electrically connected to the first connecting wire L1, thereby achieving electrical connection between the third hole-edge electrode 215 and the fourth hole-edge electrode 216.

[0228] For example, Figure 22 As shown, a third electrode line X3 is provided on the edge of the fifth hole edge electrode 113 near the first mounting hole H1. The third electrode line X3 is electrically connected to the fifth hole edge electrode 113. The third electrode line X3 is directly electrically connected to the second connecting wire L2, thereby realizing electrical connection between the fifth hole edge electrode 113 and the first gap electrode 111.

[0229] It should be noted that Figure 21 and Figure 22 The connection method between the electrode line X and the connecting wire L is only for illustration. The method of electrical connection between the two can refer to the setting method in the above-mentioned embodiment in which the touch electrode is electrically connected through the connecting wire L. The electrical connection between the touch electrode and the connecting wire L can be regarded as the electrical connection between the electrode line X electrically connected to the touch electrode and the connecting wire, so it will not be repeated here.

[0230] In some embodiments, the width of the electrode line X ranges from 20 μm to 60 μm, for example, 20 μm, 30 μm, 40 μm, 50 μm, or 60 μm.

[0231] Illustratively, when the line width of the metal mesh WD in the gap region G is 4 μm, the ratio of the width of the electrode line X to the line width of the metal mesh WD in the gap region G is in the range of 5 to 15, for example, 5, 7.5, 10, 12.5 or 15.

[0232] For example, when the line width of the metal mesh WD in the gap region G is 5 μm, the ratio of the width of the electrode line X to the line width of the metal mesh WD in the gap region G is in the range of 4 to 12, for example, 4, 6, 8, 10 or 12.

[0233] In some embodiments, the touch function layer 2 further includes a signal shielding portion P, which is disposed between the connecting wire L and the electrode wire X, or between different connecting wires L; the signal shielding portion P extends along the contour of the mounting hole H. The signal shielding portion P is used to prevent crosstalk between the connecting wire L and the electrode wire X, or between different connecting wires, located on both sides of the signal shielding portion P and transmitting different touch signals. It should be noted that the so-called "different touch signals" refer to TX signals and RX signals; wherein, one of the TX signal and the RX signal is transmitted on the first touch unit, and the other is transmitted on the second touch unit).

[0234] For example, the signal shielding portion P may not be connected to other conductive structures in the touch panel, or may be grounded, or may be connected to a low voltage signal to shield different touch signals on both sides thereof.

[0235] For example, Figure 21 As shown, a first signal shielding portion P1 is respectively provided between the first electrode line X1 and the first connecting wire L1, and between the second electrode line X2 and the third connecting wire L3. The first signal shielding portion P1 can prevent crosstalk between different touch signals respectively transmitted on the first electrode line X1 and the first connecting wire L1, and on the second electrode line X2 and the third connecting wire L3.

[0236] For example, Figure 14B As shown, the hole edge electrode K at the upper right position of the first mounting hole H1 is the seventh hole edge electrode 217, and the hole edge electrode K at the lower left position of the first mounting hole H1 is the eighth hole edge electrode 218. The seventh hole edge electrode 217 and the eighth hole edge electrode 218 are electrically connected via a fourth connecting wire L4. On this basis, as Figure 22As shown, a first signal shielding portion P1 is provided between the third electrode line X3 and the fourth connecting wire L4 to prevent crosstalk between the touch signals transmitted on the third electrode line X3 and the fourth connecting wire L4; two connecting wires, the fourth connecting wire L4 and the second connecting wire L2, are provided between the first signal shielding portion P1 and the light blocking portion D. Since different touch signals are transmitted on the fourth connecting wire L4 and the second connecting wire L2, a second signal shielding portion P2 is provided between the fourth connecting wire L4 and the second connecting wire L2 to prevent crosstalk between the touch signals transmitted on the fourth connecting wire L4 and the second connecting wire L2.

[0237] In some embodiments, the width of the signal shielding portion P ranges from 10 μm to 50 μm, such as 10 μm, 20 μm, 30 μm, 40 μm, or 50 μm.

[0238] Exemplarily, when the line width of the metal mesh WD located in the gap region G is 4 μm, the ratio of the width of the signal shielding portion P to the line width of the metal mesh WD located in the gap region G is in the range of 2.5 to 12.5, for example, 2.5, 5, 7.5, 10 or 12.5.

[0239] Exemplarily, when the line width of the metal mesh WD in the gap region G is 5 μm, the ratio of the width of the signal shielding portion P to the line width of the metal mesh WD in the gap region G is in the range of 2 to 10, for example, 2, 4, 6, 8 or 10.

[0240] like Figure 24 and Figure 25 As shown, some embodiments of the present disclosure provide a touch display device 1000. The touch display device 1000 may be an electroluminescent display device or a photoluminescent display device. In the case where the touch display device 1000 is an electroluminescent display device, the electroluminescent display device may be an organic light-emitting diode (OLED) or a quantum dot electroluminescent display device (QLED). In the case where the touch display device 1000 is a photoluminescent display device, the photoluminescent display device may be a quantum dot photoluminescent display device.

[0241] like Figure 24 and Figure 25As shown, in the case where the touch display device 1000 is an electroluminescent display device, the main structure of the electroluminescent display device includes an electroluminescent display panel 400, a touch panel 100 as described in some of the above embodiments, a polarizer 500, a first optically clear adhesive (OCA) 600 and a cover glass 300 arranged in sequence.

[0242] The electroluminescent display panel 400 includes a display substrate 401 and an encapsulation layer 402 for encapsulating the display substrate 401. Here, the encapsulation layer 402 can be an encapsulation film or an encapsulation substrate.

[0243] In some embodiments, as Figure 24 As shown, the touch function layer 2 of the touch panel 100 is directly disposed on the encapsulation layer 402 , so that the electroluminescent display panel 400 can be regarded as the base substrate 1 of the touch panel 100 . This structure is conducive to achieving a thinner and lighter display device.

[0244] In other embodiments, Figure 25 As shown, the touch function layer 2 of the touch panel 100 is disposed on a base substrate 1, which is attached to the encapsulation layer 402 via a second optical adhesive 700. The base substrate 1 may be made of, for example, polyethylene terephthalate (PET), polyimide (PI), cycloolefin polymer (COP), or the like.

[0245] like Figure 24 and Figure 25 As shown, each subpixel of the display substrate 401 includes a light-emitting device and a driving circuit disposed on a substrate 310. The driving circuit includes multiple thin-film transistors (TFTs). The light-emitting device includes an anode 311, a light-emitting functional layer 312, and a cathode 313. The anode 311 is electrically connected to the drain of a thin-film transistor (TFT) serving as a driving transistor among the multiple thin-film transistors (TFTs).

[0246] The display substrate 401 further includes a pixel defining layer 314 . The pixel defining layer 314 includes a plurality of opening regions, and one light emitting device is disposed in one opening region.

[0247] In some embodiments, the light-emitting functional layer 312 includes a light-emitting layer. In other embodiments, the light-emitting functional layer 312 includes, in addition to the light-emitting layer, one or more of an electron transporting layer (ETL), an electron injection layer (EIL), a hole transporting layer (HTL), and a hole injection layer (HIL).

[0248] like Figure 24 and Figure 25 As shown, the display substrate 401 further includes a planar layer 315 disposed between the thin film transistor TFT and the anode 311 .

[0249] When the touch display device 1000 is an electroluminescent display device, the touch display device 1000 can be a top-emitting display device. In this case, the anode 311 close to the substrate 310 is opaque, and the cathode 313 away from the substrate 310 is transparent or translucent. The touch display device 1000 can also be a bottom-emitting display device. In this case, the anode 311 close to the substrate 310 is transparent or translucent, and the cathode 313 away from the substrate 310 is opaque. The touch display device 1000 can also be a double-sided light-emitting display device. In this case, both the anode 311 close to the substrate 310 and the cathode 313 away from the substrate 310 are transparent or translucent.

[0250] The beneficial effects achieved by the touch display device 1000 are the same as those achieved by the touch panel 100 in the above embodiment, and are not described in detail here.

[0251] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A touch panel, characterized in that: The touch panel has a touch area; the touch panel includes: a substrate base; and A touch function layer is provided on the base substrate, the touch function layer comprising a plurality of first touch units extending along a first direction and a plurality of second touch units extending along a second direction; each first touch unit comprises a plurality of first touch electrodes arranged along the first direction and connected in series with each other, and each second touch unit comprises a plurality of second touch electrodes arranged along the second direction and connected in series with each other; the first touch electrodes and the second touch electrodes are insulated from each other; the plurality of first touch units are located in the same layer, and the plurality of second touch units are located in the same layer; the first direction and the second direction intersect; In which, the base substrate has at least two mounting holes located in the touch area, the touch function layer is hollowed out at the positions of the at least two mounting holes, and a gap area is provided between two adjacent mounting holes; in a first touch unit passing through the gap area, the first touch electrode located in the gap area forms a first gap electrode and a second gap electrode arranged along the first direction and electrically connected to each other; in a second touch unit passing through the gap area, the second touch electrode located in the gap area forms a third gap electrode and a fourth gap electrode arranged along the second direction and electrically connected to each other; along the first direction, the third gap electrode is located between the first gap electrode and the second gap electrode.

2. The touch panel according to claim 1, wherein: The profile of the first gap electrode and / or the second gap electrode is at least partially different from the profile of the first touch electrode located in the non-gap area; The profile of the third gap electrode and / or the fourth gap electrode is at least partially different from the profile of the second touch electrode located in the non-gap region; The third gap electrode is embedded in an integral electrode formed by electrically connecting the first gap electrode and the second gap electrode.

3. The touch panel according to claim 1, wherein: The mutual capacitance value between the first gap electrode and the second gap electrode, and between the third gap electrode and the fourth gap electrode is C1; A mutual capacitance value C2 between the first touch electrode and the second touch electrode located outside the gap area; The ratio of C1 to C2 ranges from 0.75 to 0.

8.

4. The touch panel according to claim 1, wherein: The ratio of the sum of the areas of the third gap electrode and the fourth gap electrode to the sum of the areas of the first gap electrode and the second gap electrode is in a range of 1.2 to 1.4; or The ratio of the area of ​​the second touch electrode to the area of ​​the first touch electrode in the non-gap region is in the range of 0.9-1.

5. The touch panel according to claim 1, wherein: An edge of at least one of the third gap electrode or the fourth gap electrode has at least one branch, the edge is close to at least one of the first gap electrode or the second gap electrode, and the at least one branch extends into at least one of the first gap electrode or the second gap electrode; or The edge of at least one of the third gap electrode or the fourth gap electrode has at least one branch, the edge is close to at least one of the first gap electrode or the second gap electrode, the at least one branch extends into at least one of the first gap electrode or the second gap electrode, and the edge of the branch is in a broken line shape.

6. The touch panel according to claim 1, wherein: The third gap electrode and the first gap electrode have mutually adjacent contours that are complementary to each other, and the third gap electrode and the second gap electrode have mutually adjacent contours that are complementary to each other.

7. The touch panel according to claim 6, wherein: The contour of the third gap electrode has protrusions of various shapes, wherein the protrusions of various shapes include at least two of wavy protrusions, rectangular protrusions, trapezoidal protrusions and triangular protrusions; The third gap electrode includes a first portion, a second portion, and a third portion that are connected to form a whole. The first portion, the second portion, and the third portion are arranged in sequence along the direction from the third gap electrode to the fourth gap electrode. The average dimensions of the first portion and the third portion along the first direction are both smaller than the average dimension of the second portion along the first direction. Or, The contour of the third gap electrode has protrusions of various shapes, and the protrusions of various shapes include at least one of the wavy protrusions and the rectangular protrusions, the trapezoidal protrusions, and the triangular protrusions; The third gap electrode includes a first portion, a second portion, and a third portion that are connected as a whole. The first portion, the second portion, and the third portion are arranged in sequence along the direction from the third gap electrode to the fourth gap electrode; the average size of the first portion and the third portion in the first direction are both smaller than the average size of the second portion in the first direction; the contours of the first portion close to the first gap electrode and the contours close to the second gap electrode both have the wavy protrusion.

8. The touch panel according to claim 1, wherein: Each of the second touch control units further includes a plurality of bridge structures; along the second direction, every two adjacent second touch control electrodes are electrically connected via a bridge structure; The third gap electrode and the fourth gap electrode are electrically connected via a bridge structure located in the gap region; In the second touch unit passing through the gap area, a line connecting the center of any bridge structure located outside the gap area and the center of the bridge structure connecting the third gap electrode and the fourth gap electrode intersects the second direction.

9. The touch panel according to claim 1, wherein: The touch function layer further includes: a light blocking portion, at least one connecting wire, a first signal shielding portion, and an electrode line sequentially arranged around the mounting hole along the radial direction of the mounting hole and from the center of the mounting hole to the edge; The light blocking portion extends along the edge of the mounting hole to form a closed loop structure, and the light blocking portion is configured to block light passing through the mounting hole from entering the area around the mounting hole; The connecting wire is configured to electrically connect two adjacent first touch electrodes arranged along the first direction, or to electrically connect two adjacent second touch electrodes arranged along the second direction; The electrode wire is configured to electrically connect an edge of the first touch electrode or the second touch electrode close to the mounting hole; The first signal shielding portion is at least arranged between adjacent connecting wires and electrode lines.

10. A touch panel, characterized in that: The touch panel has a touch area; the touch panel includes: a substrate base; and A touch function layer is provided on the base substrate, the touch function layer comprising a plurality of first touch units extending along a first direction and a plurality of second touch units extending along a second direction; each first touch unit comprises a plurality of first touch electrodes arranged along the first direction and connected in series with each other, and each second touch unit comprises a plurality of second touch electrodes arranged along the second direction and connected in series with each other; the first touch electrodes and the second touch electrodes are insulated from each other; and the first direction and the second direction intersect; The base substrate has at least two mounting holes located in the touch area, the touch function layer is hollowed out at the locations of the at least two mounting holes, and a gap area is defined between two adjacent mounting holes; in a first touch unit passing through the gap area, a first touch electrode located in the gap area forms a first gap electrode and a second gap electrode arranged along the first direction and electrically connected to each other; in a second touch unit passing through the gap area, a second touch electrode located in the gap area forms a third gap electrode and a fourth gap electrode arranged along the second direction and electrically connected to each other; along the first direction, the third gap electrode is located between the first gap electrode and the second gap electrode; Two adjacent mounting holes located on both sides of the gap area are respectively a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are arranged along the first direction; The first gap electrode is adjacent to a side of the first mounting hole close to the gap region, and the second gap electrode is adjacent to a side of the second mounting hole close to the gap region; Among them, in the touch area, the area around the first mounting hole and the second mounting hole and not the gap area is the hole edge area; the area in the touch area except the gap area and the hole edge area is the normal area.

11. The touch panel according to claim 10, wherein: The first touch electrode and the second touch electrode include a metal mesh structure; a line width of the metal mesh of at least one of the first gap electrode, the second gap electrode, the third gap electrode, and the fourth gap electrode is greater than a line width of the metal mesh of the touch electrode located in the normal area; or, The first touch electrode and the second touch electrode include a metal mesh structure; a line width of the metal mesh of at least one of the first gap electrode, the second gap electrode, the third gap electrode, and the fourth gap electrode is greater than a line width of the metal mesh of the touch electrode located in the normal area; The line width of the metal mesh of at least one of the first gap electrode, the second gap electrode, the third gap electrode, and the fourth gap electrode is in a range of 3.8 μm to 5.2 μm; The line width of the metal grid of the touch electrode located in the normal area ranges from 2.8 μm to 4.2 μm.

12. The touch panel according to claim 10, wherein: The first gap electrode includes: a first main sub-electrode, and a first compensation sub-electrode arranged near the first mounting hole; the first main electrode is a metal grid structure, the first compensation sub-electrode is a planar electrode, and the first main electrode is electrically connected to the first compensation sub-electrode; and / or, The second gap electrode includes: a second main sub-electrode and a second compensation sub-electrode arranged near the second mounting hole; the second main sub-electrode is a metal grid structure, the second compensation sub-electrode is a planar electrode, and the second main sub-electrode is electrically connected to the second compensation sub-electrode.

13. The touch panel according to claim 10, wherein: The touch function layer further includes a first connecting wire extending along the outline of the second mounting hole; Wherein, in the second touch unit passing through the first mounting hole, two second touch electrodes located on both sides of the first mounting hole along the second direction respectively form a first hole edge electrode and a second hole edge electrode; the first hole edge electrode, the third gap electrode, the fourth gap electrode and the second hole edge electrode are electrically connected in sequence; In the second touch unit passing through the second mounting hole, two second touch electrodes located on both sides of the second mounting hole along the second direction respectively form a third hole edge electrode and a fourth hole edge electrode; the third hole edge electrode and the fourth hole edge electrode are electrically connected via a first connecting wire; The first hole-side electrode, the third gap electrode, the fourth gap electrode and the second hole-side electrode are electrically connected to form a whole, which is insulated from the third hole-side electrode, the fourth hole-side electrode and the first connecting wire.

14. The touch panel according to claim 10, wherein: The touch function layer further includes a second connecting wire extending along the outline of the first mounting hole and a third connecting wire extending along the outline of the second mounting hole; Among them, in the first touch unit passing through the first mounting hole and the second mounting hole, the first touch electrode located on the side of the first mounting hole away from the second mounting hole forms a fifth hole-edge electrode; the first touch electrode located on the side of the second mounting hole away from the first mounting hole forms a sixth hole-edge electrode; The fifth hole edge electrode is electrically connected to the first gap electrode via a second connecting wire; The sixth hole-side electrode and the second gap electrode are electrically connected via a third connecting wire.

15. The touch panel according to claim 10, wherein: Each of the second touch control units further includes a plurality of bridge structures; along the second direction, each adjacent two second touch control electrodes are electrically connected via a bridge structure; and the third gap electrode and the fourth gap electrode are electrically connected via a bridge structure located in the gap region; In the second touch unit passing through the gap area, a line connecting the center of any bridge structure located outside the gap area and the center of the bridge structure connecting the third gap electrode and the fourth gap electrode intersects the second direction.

16. The touch panel according to claim 15, wherein: The layer where the plurality of first touch electrodes and the plurality of second touch electrodes are located serves as the touch electrode layer; along the first direction, every two adjacent first touch electrodes are directly electrically connected; Along the second direction, every two adjacent second touch electrodes are independently arranged; the bridging structure of the multiple second touch units serves as a bridging structure layer, and the bridging structure layer is located on a side of the touch electrode layer close to or away from the base substrate; the touch function layer further includes an insulating layer located between the touch electrode layer and the bridging structure layer, and the insulating layer has a plurality of via holes; along the second direction, every two adjacent second touch electrodes pass through different via holes and are respectively electrically connected to a bridging structure; the bridging structure for connecting the third gap electrode and the fourth gap electrode is a gap bridging structure, and the third gap electrode and the fourth gap electrode pass through different via holes in the insulating layer and are respectively electrically connected to the gap bridging structure; or, The layer where the plurality of first touch electrodes and the plurality of second touch electrodes are located serves as the touch electrode layer; Along the first direction, every two adjacent first touch electrodes are directly electrically connected; Along the second direction, every two adjacent second touch electrodes are independently arranged; the bridge structure of the multiple second touch units serves as a bridge structure layer, and the bridge structure layer is located on a side of the touch electrode layer close to or away from the base substrate; the touch function layer further includes an insulating layer located between the touch electrode layer and the bridge structure layer, and the insulating layer has a plurality of via holes; along the second direction, every two adjacent second touch electrodes pass through different via holes and are respectively electrically connected to a bridge structure; the bridge structure for connecting the third gap electrode and the fourth gap electrode is a gap bridge structure, and the third gap electrode and the fourth gap electrode pass through different via holes in the insulating layer and are respectively electrically connected to the gap bridge structure; the gap bridge structure has a hollow portion; An orthographic projection of a conductive pattern for directly electrically connecting the first gap electrode and the second gap electrode on the base substrate at least partially overlaps with an orthographic projection of a hollow portion of the gap bridging structure on the base substrate.

17. The touch panel according to claim 16, wherein: The touch electrode layer includes: a third hole edge electrode, a fourth hole edge electrode, a fifth hole edge electrode, a sixth hole edge electrode, a second connecting wire, and a third connecting wire; and The bridge structure layer includes a first connecting wire, which passes through different via holes in the insulating layer and is electrically connected to the third hole-side electrode and the fourth hole-side electrode respectively; Wherein, the second connecting wire is directly electrically connected to the fifth hole edge electrode and the first gap electrode; and The third connecting wire is directly electrically connected to the sixth hole-side electrode and the second gap electrode.

18. The touch panel according to claim 10, wherein: The touch function layer further includes: a light blocking portion, at least one connecting wire, a first signal shielding portion, and an electrode line sequentially arranged around the mounting hole along the radial direction of the mounting hole and from the center of the mounting hole to the edge; The light blocking portion extends along the edge of the mounting hole to form a closed loop structure, and the light blocking portion is configured to block light passing through the mounting hole from entering the area around the mounting hole; The connecting wire is configured to electrically connect two adjacent first touch electrodes arranged along the first direction, or to electrically connect two adjacent second touch electrodes arranged along the second direction; The electrode wire is configured to electrically connect an edge of the first touch electrode or the second touch electrode close to the mounting hole; The first signal shielding portion is at least provided between adjacent connecting wires and electrode lines; or, The touch function layer further includes: a light blocking portion, at least one connecting wire, a first signal shielding portion, and an electrode line sequentially arranged around the mounting hole along the radial direction of the mounting hole and from the center of the mounting hole to the edge; The light blocking portion extends along the edge of the mounting hole to form a closed loop structure, and the light blocking portion is configured to block light passing through the mounting hole from entering the area around the mounting hole; The connecting wire is configured to electrically connect two adjacent first touch electrodes arranged along the first direction, or to electrically connect two adjacent second touch electrodes arranged along the second direction; The electrode wire is configured to electrically connect an edge of the first touch electrode or the second touch electrode close to the mounting hole; The first signal shielding portion is at least arranged between adjacent connecting wires and electrode lines; the at least one connecting wire includes a plurality of connecting wires arranged between the light shielding portion and the first signal shielding portion; The touch function layer further includes a second signal shielding portion disposed between two adjacent connecting wires, and the second signal shielding portion extends along the outline of the mounting hole.

19. A touch display device, characterized in that: The touch panel comprises the touch panel as claimed in claim 1.

20. A touch display device, characterized in that: The touch panel comprises the touch panel as claimed in claim 10.

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