Touch structure, touch display panel and electronic device

Abstract

A touch structure, a touch display panel and an electronic device, the touch structure comprising a first metal grid layer and a second metal grid layer, the first metal grid layer comprising a first touch electrode and a plurality of second touch sub-electrodes, the second metal grid layer comprising a plurality of second connection electrodes spaced from each other, each of the plurality of second connection electrodes being electrically connected to an adjacent second touch sub-electrode through a plurality of vias in the insulating layer. At least two first metal grids in the second touch sub-electrodes have a plurality of vertices overlapping with at least two second metal grids in the second connection electrodes, the plurality of vertices comprising a plurality of connection vertices, and a plurality of vias being respectively located at the plurality of connection vertices; among the vertices of the first metal grid adjacent to each connection vertex, at most only one vertex is a connection vertex. The touch structure can effectively reduce the capacitive load on the touch electrode.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to a touch structure, a touch display panel and an electronic device. Background Art

[0002] User interfaces with touch functions are widely used in various electronic devices, such as display devices. The touch structure for realizing the touch function includes a touch electrode structure, and the configuration of the touch electrode structure is an important factor affecting user experience. Summary of the invention

[0003] At least one embodiment of the present disclosure provides a touch structure, including a first metal grid layer and a second metal grid layer, wherein the first metal grid layer and the second metal grid layer are separated by an insulating layer located between the first metal grid layer and the second metal grid layer, wherein the first metal grid layer includes a plurality of first metal grids defined by a plurality of first metal wires, and the second metal grid layer includes a plurality of second metal grids defined by a plurality of second metal wires, wherein each of the plurality of first metal grids and each of the second metal grids are polygonal; the first metal grid layer includes a plurality of first touch sub-electrodes and a plurality of first connecting electrodes arranged along a first direction, wherein the plurality of first touch sub-electrodes and the plurality of first connecting electrodes are alternately distributed one by one and electrically connected in sequence to form first touch electrodes extending along the first direction; the first metal grid layer also includes a plurality of second touch sub-electrodes arranged in sequence and spaced from each other in a second direction, wherein the first direction intersects with the second direction; Each of the first and second touch sub-electrodes are spaced from each other and respectively include multiple first metal grids; the second metal grid layer includes multiple second connecting electrodes spaced from each other, each of the multiple second connecting electrodes is electrically connected to an adjacent second touch sub-electrode through a plurality of vias in the insulating layer, thereby electrically connecting the adjacent second touch sub-electrodes to form a second touch electrode extending in the second direction; the orthographic projections of multiple first metal wires in at least two first metal grids in the second touch sub-electrodes on the second metal grid layer overlap with the multiple second metal wires in at least two second metal grids in the corresponding second connecting electrode, respectively, so that the at least two first metal grids have multiple vertices overlapping with the at least two second metal grids, the multiple vertices include multiple connecting vertices, and the multiple vias are respectively arranged at the multiple connecting vertices in a one-to-one correspondence; among the vertices adjacent to each connecting vertex among the multiple connecting vertices, at most only one vertex is a connecting vertex.

[0004] In some examples, the adjacent vertices of each connected vertex are not connected vertices.

[0005] In some examples, the number of the plurality of vertices is not less than 5, and the number of the plurality of connected vertices is not less than 3.

[0006] In some examples, the at least two second metal grids are edge metal grids of the second connecting electrode.

[0007] In some examples, the at least two first metal grids are edge metal grids of the second touch sub-electrode.

[0008] In some examples, the plurality of connected vertices are not located on a straight line.

[0009] In some examples, the plurality of connected vertices are located on a straight line.

[0010] In some examples, there is no break in a first metal line in the first metal mesh that is directly connected to the connection vertex.

[0011] In some examples, each of the plurality of second connecting electrodes includes at least two first connecting lines, each of the at least two first connecting lines includes a plurality of second metal wires connected end to end in sequence, and both ends of each of the at least two first connecting lines are electrically connected to a connection vertex of the first metal grid through a via, respectively.

[0012] In some examples, each of the multiple first metal grids and each of the second metal grids is hexagonal; at least one second connecting electrode includes two edge second metal grids located at each end; the four second metal wires of the two edge second metal grids of the second connecting electrode overlap with the four first metal wires of the three edge first metal grids in the adjacent second touch sub-electrode in a direction perpendicular to the second metal grid layer, so that the three edge first metal grids have five vertices overlapping with the two second metal grids; the four first metal wires connect the five vertices in sequence to form a W shape; the five vertices are vertex No. 1, vertex No. 2, vertex No. 3 and vertex No. 4 in sequence.

[0013] In some examples, the second touch sub-electrode is electrically connected to the second connection electrode through four vias, and the four vias are respectively located at the vertex No. 1, the vertex No. 2, the vertex No. 4, and the vertex No. 5.

[0014] In some examples, the second connecting electrode further includes a plurality of intermediate second metal grids, the plurality of intermediate second metal grids being located between the edge second metal grids at both ends of the second connecting electrode and connecting the edge second metal grids at both ends; the plurality of intermediate second metal grids are connected in sequence, and each intermediate second metal grid includes two second metal wires parallel to the second direction, and each of the two second metal wires is located at an edge of the second connecting electrode.

[0015] In some examples, adjacent second touch sub-electrodes are electrically connected through two second connecting electrodes, and the two second connecting electrodes are spaced apart from each other; the orthographic projection of each of the multiple first connecting electrodes on the second metal grid layer is located within the gap between the two second connecting electrodes between adjacent second touch sub-electrodes, and each of the multiple first touch sub-electrodes is electrically connected to the adjacent first connecting electrode through at least one second connecting line composed of a plurality of first metal wires connected end to end in sequence.

[0016] In some examples, the orthographic projections of the plurality of first metal wires connected end to end on the second metal grid layer overlap with the plurality of second metal wires in the second connecting electrode, respectively.

[0017] In some examples, multiple first metal wires located in the boundary area between adjacent first touch sub-electrodes and second touch sub-electrodes respectively include multiple breaks, each of the multiple breaks divides the first metal wire into two first metal wire segments, one of the two first metal wire segments belongs to the first touch sub-electrode, and the other belongs to the second touch sub-electrode, thereby insulating the adjacent first touch sub-electrode and the second touch sub-electrode.

[0018] In some examples, the multiple fractures include multiple first fractures located on a straight line, the multiple first fractures are respectively located on multiple first metal wires orthogonal to the straight line, there is at least one first metal wire between at least two first fractures, the at least one first metal wire intersects the straight line, and there is no fracture at the intersection of the at least one first metal wire with the straight line.

[0019] In some examples, the first metal grid layer includes a plurality of first touch electrodes arranged along the second direction, at least one first metal grid includes three first metal grid parts insulated from each other, the three first metal grid parts respectively belong to three touch sub-electrodes insulated from each other, the three touch sub-electrodes include two first touch sub-electrodes adjacent in the second direction and a second touch sub-electrode located between the two first touch sub-electrodes, or two second touch sub-electrodes adjacent in the first direction and a first touch sub-electrode located between the two second touch sub-electrodes.

[0020] At least one embodiment of the present disclosure further provides a touch display panel, including a base substrate, and a display structure and the touch structure stacked on the base substrate.

[0021] In some examples, the display structure includes a plurality of sub-pixels, each of the plurality of sub-pixels includes a light-emitting element and a pixel opening area exposing the light-emitting element; and the orthographic projections of the plurality of first metal lines and the plurality of second metal lines on the substrate are both located outside the orthographic projections of the plurality of pixel opening areas of the plurality of sub-pixels on the substrate.

[0022] In some examples, the orthographic projection of at least one mesh of the first metal grid on the substrate covers the orthographic projection of two pixel opening areas of two adjacent sub-pixels on the substrate, and the two adjacent sub-pixels are first sub-pixels configured to emit light of the same first basic color; the center distance between the two pixel opening areas is smaller than the center distance between two pixel opening areas of two sub-pixels emitting light of the same other basic colors.

[0023] In some examples, the multiple sub-pixels are distributed in multiple pixel units, each of the multiple pixel units is configured for full-color light; and the two first sub-pixels are respectively located in two pixel units.

[0024] At least one embodiment of the present disclosure further provides an electronic device, comprising the above-mentioned touch structure or the above-mentioned touch display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure and are not limitations of the present disclosure.

[0026] Figure 1A A schematic diagram of pixel arrangement of a display structure provided by at least one embodiment of the present disclosure;

[0027] Figure 1B A schematic diagram of a display structure provided for at least one embodiment of the present disclosure;

[0028] Figure 1C for Figure 1B A cross-sectional view along the section line AA';

[0029] Figure 1D A schematic diagram of a display structure provided for another embodiment of the present disclosure;

[0030] Figure 2 A schematic diagram of pixel arrangement of a display structure provided in some other embodiments of the present disclosure;

[0031] Figure 3A One of the schematic diagrams of a touch structure provided by at least one embodiment of the present disclosure;

[0032] Figure 3B A second schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0033] Figure 4A and Figure 4B A third schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0034] Figure 5A A fourth schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0035] Figure 5B for Figure 5A A cross-sectional view along the section line BB';

[0036] Figure 5C A fifth schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0037] Figure 5D for Figure 5A A cross-sectional view along the section line D-D';

[0038] Figure 5E A sixth schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0039] Fig. 6A A seventh schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0040] Figure 6B An eighth schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0041] Fig. 7A A schematic diagram of a metal wire fracture design;

[0042] Figure 7B A simulation diagram of the shadow elimination design of the touch structure provided in the embodiment of the present disclosure;

[0043] Figure 8 A ninth schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0044] Fig. 9 A tenth schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0045] Fig.10 A schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0046] Fig.11 A schematic diagram of an electronic device provided according to at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. With reference to the non-limiting exemplary embodiments shown in the accompanying drawings and described in detail in the following description, the exemplary embodiments of the present disclosure and their various features and advantageous details are more fully described. It should be noted that the features shown in the figures are not necessarily drawn to scale. The present disclosure omits the description of known materials, components and process technologies so as not to obscure the exemplary embodiments of the present disclosure. The examples given are only intended to facilitate the understanding of the implementation of the exemplary embodiments of the present disclosure, and to further enable those skilled in the art to implement the exemplary embodiments. Therefore, these examples should not be construed as limiting the scope of the embodiments of the present disclosure.

[0048] Unless otherwise specifically defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in various embodiments of the present disclosure, the same or similar reference numerals represent the same or similar components.

[0049] Organic light-emitting diode (OLED) display panels have the characteristics of self-luminescence, high contrast, low energy consumption, wide viewing angle, fast response speed, can be used for flexible panels, wide operating temperature range, simple manufacturing, etc., and have broad development prospects. In order to meet the diverse needs of users, it is of great significance to integrate multiple functions in the display panel, such as touch function, fingerprint recognition function, etc. For example, forming an on-cell touch structure in an OLED display panel is one implementation method, which realizes the touch function of the display panel by forming the touch structure on the packaging film of the OLED display panel.

[0050] For example, a mutual capacitance touch structure includes a plurality of touch electrodes, which include touch drive electrodes and touch sensing electrodes extending in different directions, and the touch drive electrodes and the touch sensing electrodes form mutual capacitance for touch sensing at the intersections. The touch drive electrodes are used to input excitation signals (touch drive signals), and the touch sensing electrodes are used to output touch sensing signals. By inputting excitation signals to, for example, touch drive electrodes extending longitudinally, and receiving touch sensing signals from, for example, touch sensing electrodes extending transversely, a detection signal reflecting the capacitance value of the coupling point (for example, the intersection) of the transverse and longitudinal electrodes can be obtained. When a finger touches the capacitive screen, the coupling between the touch drive electrode and the touch sensing electrode near the touch point is affected, thereby changing the capacitance of the mutual capacitance between the two electrodes at the intersection, resulting in a change in the touch sensing signal. Based on the data of the change in the two-dimensional capacitance of the touch screen based on the touch sensing signal, the coordinates of the touch point can be calculated.

[0051] A touch electrode is formed by a metal mesh pattern. The metal mesh has good ductility and flexibility, can improve the bending resistance and processability of the touch electrode, and is suitable for flexible electronic applications.

[0052] For example, when the touch electrode formed by the metal grid is integrated into the display panel, the metal wires in the metal grid need to be arranged outside the pixel opening area of ​​the display panel to avoid the metal wires blocking the light and causing the pixel opening rate to decrease. For example, the metal wires in the metal grid are arranged in the pixel spacing area between the pixel opening areas, and the mesh holes in the metal grid are arranged in a one-to-one correspondence with the pixel opening areas to expose the light-emitting elements of each sub-pixel.

[0053] The inventors found that, for example, the spacing between the sub-pixels in the display panel is not uniform. When the spacing between two sub-pixels is close, the metal wires arranged between the two sub-pixels will be close to the pixel opening area of ​​the sub-pixels, which can easily cause adverse effects on the display functions of the two sub-pixels, such as blocking the light emitted by the sub-pixels under squinting, reflecting the light emitted by the sub-pixels and causing cross-color problems, etc. In addition, if the area of ​​the pixel opening area of ​​the sub-pixel is small, the adverse effect will be more obvious.

[0054] At least one embodiment of the present disclosure provides a touch display panel, including a base substrate and a display structure and a touch structure stacked on the base substrate, wherein the orthographic projection of each mesh of at least one first metal grid on the base substrate covers the orthographic projection of two pixel opening areas of two adjacent sub-pixels on the base substrate, the two adjacent sub-pixels are first sub-pixels configured to emit light of the same first basic color; the center distance between the two pixel opening areas of the two first sub-pixels is smaller than the center distance between the two pixel opening areas of two sub-pixels emitting light of the same other basic colors.

[0055] It should be noted that the above-mentioned “center” refers to the geometric center of the plane shape of the pixel opening area parallel to the base substrate.

[0056] By setting the pixel opening areas of two sub-pixels with a close spacing to share a mesh, that is, removing the metal wire between the two pixel opening areas, the metal wires in the metal grid are sufficiently far away from the pixel opening areas, thereby avoiding the adverse effects on the display caused by the metal wires being close to the pixel opening areas, and effectively improving the display effect.

[0057] Since the two adjacent sub-pixels emit light of the same color, the pixel opening areas of the two can be close to each other without the problem of cross-color; in addition, for example, when the organic light-emitting diode is prepared by the fine metal mask (FMM) evaporation process, the light-emitting layers of the two sub-pixels can be formed through one evaporation hole, thereby reducing the difficulty of the preparation process. For example, the light-emitting layers of the two sub-pixels are connected to each other as an integrated structure.

[0058] For example, the areas of the pixel opening regions of the two sub-pixels are equal and smaller than the area of ​​the pixel opening region of the sub-pixels emitting light of other basic colors.

[0059] In order to improve the display resolution, the conventional red, green and blue sub-pixels that simply define a pixel can be changed to simulate the same pixel resolution performance with a relatively small number of sub-pixels, thereby reducing the difficulty and cost of the manufacturing process. For example, in some pixel arrangements, the pixel structure includes a plurality of first sub-pixels, a plurality of second sub-pixels and a plurality of third sub-pixels, the first sub-pixels are configured to emit light of a first basic color, the second sub-pixels are configured to emit light of a second basic color, and the third sub-pixels are configured to emit light of a third basic color. Each pixel unit includes a first sub-pixel; each sub-pixel that emits light different from the first basic color, that is, each second sub-pixel and each third sub-pixel are respectively shared by at least two pixel units; each pixel unit is configured to emit full-color light. Since each pixel unit includes a first sub-pixel, the density of the first sub-pixel is the highest.

[0060] Since the second sub-pixel and the third sub-pixel in each pixel unit are shared by adjacent pixel units, the pixel unit in the embodiment of the present invention is not a pixel unit in the strict sense, that is, a pixel is defined by a complete first sub-pixel, a second sub-pixel, and a third sub-pixel. Therefore, the pixel unit can be called a virtual pixel unit.

[0061] For example, a plurality of pixel units are arranged in an array in a first direction and a second direction, and the first direction and the second direction are different directions, for example, they are orthogonal to each other. For example, in the first direction of the pixel array and in the second direction of the pixel array, the sub-pixel density is 1.5 times the pixel unit density.

[0062] For example, the difference in the resolution of sub-pixels of different colors by the human eye can be used to share sub-pixels of certain colors that are not sensitive to position resolution between different pixels. For example, the first basic color is green, the second basic color is red, and the third basic color is blue.

[0063] For example, according to the physiological structure of the human eye, the resolution of the human eye is determined by the density of the rod photoreceptors that are sensitive to brightness and the cone photoreceptors that are sensitive to color in the retina of the human eye. Among the three basic colors, the density of short-wavelength blue-sensitive cone cells is the lowest, followed by red. In addition, the brightness effect of blue and red (the stimulation of brightness-sensitive rod cells) is much lower than that of green, which causes the human eye to be significantly less sensitive to blue and red sub-pixels than green sub-pixels. At a certain pixel resolution, although the human eye can distinguish the brightness center position of the pixel and has a normal sense of color, it cannot distinguish the position or boundary of the blue or red sub-pixel on the pixel scale, making it possible for adjacent pixels to share adjacent blue and red sub-pixels to a certain extent.

[0064] For example, the sub-pixel of the present disclosure is a pixel structure that corresponds one-to-one with a light-emitting element and has an independent pixel driving circuit.

[0065] For example, the touch display panel may be a liquid crystal display panel, an organic light emitting diode display panel, a quantum dot light emitting diode display panel, or an electronic paper display panel, etc. The embodiment of the present disclosure does not display the type of the display panel.

[0066] The touch display panel provided by the embodiment of the present disclosure is exemplarily described below by taking the first basic color being green and the touch display panel being an organic light emitting diode display panel as an example, but the embodiment of the present disclosure is not limited thereto.

[0067] Figure 1A FIG. 2 shows a schematic diagram of pixel arrangement provided by an embodiment of the present disclosure. Figure 1AAs shown, the pixel arrangement structure includes a plurality of sub-pixels, and the plurality of sub-pixels are arranged in a first direction D1 and a second direction D2. The first direction D1 and the second direction D2 are different directions, for example, the two are orthogonal to each other. The plurality of sub-pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels. For example, the first sub-pixel is a green (G) sub-pixel 11, the second sub-pixel is a red (R) sub-pixel 12, and the third sub-pixel is a blue (B) sub-pixel 13; each pixel unit 10 includes a green sub-pixel 11, and each red sub-pixel 12 and each blue sub-pixel 13 are respectively shared by two adjacent pixel units 10, so the boundary of the pixel unit 10 is also very blurred. The embodiment of the present disclosure does not limit the shape of the pixel unit 10. Figure 1A and Figure 1B The pixel units 10 are exemplarily illustrated by dashed circles in FIG. A plurality of pixel units 10 are arranged in an array along the first direction D1 and the second direction D2.

[0068] For example, Figure 1A As shown, the plurality of green sub-pixels 11 are arranged in pairs, and the spacing between adjacent green sub-pixels is smaller than the spacing between two sub-pixels emitting other light of the same color, that is, smaller than the spacing between the red sub-pixel 12 and the blue sub-pixel 13, smaller than the spacing between the green sub-pixel 11 and the red sub-pixel 12, and smaller than the spacing between the green sub-pixel 11 and the blue sub-pixel 13. For example, a pair of green sub-pixels 11 are arranged along the second direction D2.

[0069] For example, a red sub-pixel 12 and a blue sub-pixel 13 are disposed between two adjacent pairs of green sub-pixels in the second direction D2 , and the red sub-pixel 12 and the blue sub-pixel 13 are arranged along the first direction D1 .

[0070] Figure 1B The touch display panel provided by at least one embodiment of the present disclosure is shown. The display structure in the touch display panel adopts Figure 1A The pixel arrangement structure shown; Figure 1C for Figure 1B Cross-sectional view along section line AA'.

[0071] Combined with reference Figure 1B and Figure 1C The touch display panel 20 includes a base substrate 21 and a display structure 30 and a touch structure 40 stacked on the base substrate 21. The touch structure 40 is located above the display structure 30 and is closer to the user during use.

[0072] For example, the touch display panel is an OLED display panel, and the display structure 30 includes a plurality of sub-pixels, including the green sub-pixel 11, the red sub-pixel 12, and the blue sub-pixel 13. Each sub-pixel includes a light-emitting element 23 and a pixel driving circuit that drives the light-emitting element 23 to emit light. The embodiments of the present disclosure do not limit the type and specific composition of the pixel driving circuit. For example, the pixel driving circuit can be a current-driven type or a voltage-driven type, and can be a 2T1C (i.e., two transistors and a capacitor, the two transistors including a driving transistor and a data writing transistor) driving circuit, and can be a driving circuit that further includes a compensation circuit (compensation transistor), a light-emitting control circuit (light-emitting control transistor), a reset circuit (reset transistor), etc. on the basis of 2T1C.

[0073] For the sake of clarity, Figure 1C Only the first transistor 24 directly electrically connected to the light emitting element 23 in the pixel driving circuit is shown. The first transistor 24 may be a driving transistor configured to work in a saturated state and control the magnitude of the current driving the light emitting element 23 to emit light. For example, the first transistor 24 may also be a light emitting control transistor, which is used to control whether the current driving the light emitting element 23 to emit light flows. The embodiments of the present disclosure do not limit the specific type of the first transistor.

[0074] For example, the light-emitting element 23 is an organic light-emitting diode, including a first electrode 231, a light-emitting layer 233 and a second electrode 232. One of the first electrode 231 and the second electrode 232 is an anode, and the other is a cathode; for example, the first electrode 231 is an anode, and the second electrode 232 is a cathode. For example, the light-emitting layer 233 is an organic light-emitting layer or a quantum dot light-emitting layer. For example, in addition to the light-emitting layer 233, the light-emitting element 23 may also include auxiliary functional layers such as a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer. For example, the light-emitting element 23 is a top emission structure, the first electrode 231 is reflective and the second electrode 232 is transmissive or semi-transmissive. For example, the first electrode 231 is a material with a high work function to act as an anode, such as an ITO / Ag / ITO stacked structure; the second electrode 232 is a material with a low work function to act as a cathode, such as a semi-transmissive metal or metal alloy material, such as an Ag / Mg alloy material.

[0075] The first transistor 24 includes a gate 241, a gate insulating layer 242, an active layer 243, a first electrode 244 and a second electrode 245, and the second electrode 245 is electrically connected to the first electrode 231 of the light emitting element 23. The embodiment of the present disclosure does not limit the type, material, and structure of the first transistor 24. For example, it can be a top gate type, a bottom gate type, etc. The active layer 243 of the first transistor 24 can be amorphous silicon, polycrystalline silicon (low temperature polycrystalline silicon and high temperature polycrystalline silicon), an oxide semiconductor (for example, indium gallium tin oxide (IGZO)), etc., and the first transistor 24 can be N-type or P-type.

[0076] The transistors used in the embodiments of the present disclosure may be thin film transistors or field effect transistors or other switching devices with the same characteristics. The embodiments of the present disclosure are described by taking thin film transistors as examples. The source and drain of the transistor used here may be symmetrical in structure, so the source and drain may be structurally indistinguishable. In the embodiments of the present disclosure, in order to distinguish the two poles of the transistor except the gate, one pole is directly described as the first pole and the other pole is directly described as the second pole.

[0077] Combination Figure 1B and Figure 1C As shown, the display structure 30 also includes a pixel defining layer 32, which is arranged on the first electrode 231 of the light-emitting element 23, and a plurality of openings 320 are formed therein, respectively exposing the first electrodes 231 of a plurality of sub-pixels, thereby defining a pixel opening area of ​​each sub-pixel, the light-emitting layer of the sub-pixel is formed in the pixel opening area, and the second electrode 232 is formed as a common electrode (i.e., shared by a plurality of sub-pixels); the pixel defining layer 32 includes a pixel opening area 110 of the green sub-pixel 11 (first sub-pixel), a pixel opening area 120 of the red sub-pixel 12 (second sub-pixel), and a pixel opening area 130 of the blue sub-pixel 13 (third sub-pixel).

[0078] The touch structure 40 includes a first metal grid layer 50, and the first metal grid layer 50 includes a plurality of first metal grids 52 defined by a plurality of first metal lines 51. The orthographic projections of the plurality of first metal lines 51 on the substrate 21 are located outside the orthographic projections of the pixel opening regions of the plurality of sub-pixels on the substrate 21, that is, the pixel separation region falling between the pixel opening regions is within the orthographic projection of the substrate 21, and the pixel separation region is also the non-opening region 321 of the pixel defining layer 32. The pixel separation region is used to separate the pixel opening regions of the plurality of sub-pixels and separate the light-emitting layers of each sub-pixel to prevent cross-color.

[0079] like Figure 1BAs shown, the orthographic projection of the mesh 520 of at least one first metal grid 52 on the substrate 21 covers the orthographic projection of two pixel opening areas 110 of two adjacent green sub-pixels 11 (i.e., a green sub-pixel pair) on the substrate, i.e., there is no corresponding first metal line 51 set between the two pixel opening areas 110.

[0080] like Figure 1B As shown, the center distance S1 of the pixel opening area 110 of the two adjacent green sub-pixels 11 is smaller than the center distance of the two pixel opening areas of the two sub-pixels emitting the same other basic color light. For example, the center distance S1 of the pixel opening area 110 of the two adjacent green sub-pixels 11 is smaller than the center distance S2 of the pixel opening area 120 of the two adjacent red sub-pixels 12, or the center distance S3 of the pixel opening area 130 of the two blue sub-pixels 13.

[0081] For example, the center distance between the pixel opening areas 110 of the two adjacent green sub-pixels 11 is smaller than the center distance between the pixel opening area 110 of any green sub-pixel 11 and the pixel opening areas of adjacent sub-pixels of other colors. Figure 1B As shown, the center distance between the pixel opening areas 110 of two adjacent green sub-pixels 11 is smaller than the center distance S4 between the pixel opening area 110 of the green sub-pixel 11 and the pixel opening area 120 of the adjacent red sub-pixel 12, and is also smaller than the center distance S5 between the pixel opening area 110 of the green sub-pixel 11 and the pixel opening area 130 of the adjacent blue sub-pixel 13.

[0082] For example, Figure 1B As shown, the orthographic projections of the meshes 520 of other first metal grids 52 directly connected to the first metal grid 52 on the base substrate 21 only cover the orthographic projections of the pixel opening area of ​​one sub-pixel on the base substrate. This is because the sub-pixels adjacent to the green sub-pixel pair are all sub-pixels of other colors, and the pixel opening areas of the sub-pixels of other colors are spaced relatively large from the pixel opening areas of the sub-pixels adjacent thereto. The pixel opening areas are arranged one-to-one with the first metal grids 52, which can increase the density of the touch electrodes, thereby increasing the sensitivity of the touch.

[0083] For example, when the organic light emitting diode is prepared by using a fine metal mask (FMM) evaporation process, the light emitting layers of the two sub-pixels can be formed through one evaporation hole, thereby reducing the difficulty of the preparation process.

[0084] like Figure 1BAs shown, a plurality of first metal grids 52 are arranged along the first direction D1 and the second direction D2. For example, each first metal grid 52 is a polygon, such as a hexagon; each first metal grid 52 includes two sides extending along the second direction D2 and opposite to each other, and the lengths of the two sides can be the same or different, and the two sides include the longest side of the first metal grid 52, that is, the longest side of each first metal grid is parallel to the second direction D2. For example, the six sides of the first metal grid 52 include three pairs of sides opposite to each other, for example, each pair of sides opposite to each other is parallel to each other; for another example, except for a pair of sides parallel to the second direction D2, the other two pairs of sides opposite to each other are not parallel to each other.

[0085] like Figure 1B As shown, for example, the shapes of the pixel opening areas of the green sub-pixel 11, the red sub-pixel 12, and the blue sub-pixel 13 are all polygonal; for example, the shapes of the pixel opening areas of the red sub-pixel 12 and the blue sub-pixel 13 are all hexagonal, and the shape of the pixel opening area of ​​the green sub-pixel 11 is a pentagon.

[0086] Figure 1B The dotted lines in the figure show the pixel opening area contour of the pixel opening area corresponding to each first metal grid 52 (i.e., the pixel opening area covered by the mesh of the first metal grid). For example, the pixel opening areas 110 of two green sub-pixels 11 arranged in pairs are arranged side by side in the second direction and share a mesh 520 of the first metal grid 52. The outer contours of the two pixel opening areas 110 are called the first pixel opening area contour 115, the pixel opening area contour of the red sub-pixel is the second pixel opening area contour 125, and the pixel opening area contour of the third sub-pixel is the third pixel opening area contour 135. The first pixel opening area contour 115, the second pixel opening area contour 125, and the third pixel opening area contour 135 are all hexagonal and are adjacent to each other.

[0087] For example, six sides of each first metal grid are parallel to six sides of the corresponding pixel opening area contour.

[0088] For example, the two sides of the contours of two adjacent pixel opening areas close to each other are parallel to each other, and a first metal line 51 is arranged between them; the orthographic projections of the two sides of the contours of two adjacent pixel opening areas close to each other on the substrate substrate 21 are parallel to the orthographic projections of the first metal line 51 on the substrate substrate 51, and the spacing with the orthographic projections of the first metal line 51 on the substrate substrate 21 is the same; that is, the first metal line 51 between the two adjacent pixel opening areas is located in the middle of the gap between the contours of the two pixel opening areas, and the minimum distance between the first metal line 51 and the two pixel opening areas (the distance to the edge of the pixel opening area closest to the first metal line) is the same. This setting can avoid the first metal line from being too small to any of the two pixel opening areas, which will cause an adverse effect on the light of the pixel opening area; in addition, this setting makes the first metal line have the same effect on the light of the two pixel opening areas, thereby improving the uniformity of display.

[0089] For the convenience of explanation, the distance between the orthographic projections of two parallel and close sides of two adjacent pixel opening area contours on the base substrate 21 is referred to as the gap between the two adjacent pixel opening area contours (PDL GAP).

[0090] For example, Figure 1B As shown, in the first direction D1, the spacing t1 between the adjacent second pixel opening area outlines 125 and the third pixel opening area outlines 135, the spacing t2 between the adjacent second pixel opening area outlines 125 and the first pixel opening area outlines 115, and the spacing t3 between the orthographic projections of the adjacent first pixel opening area outlines 115 and the third pixel opening area outlines 135 on the substrate are equal or substantially equal. For example, t1 is 23 microns, t2 is 22.8 microns, and t3 is 23 microns.

[0091] For example, Figure 1BAs shown, in an oblique direction that is neither parallel nor perpendicular to the second direction D2, the spacing k2 between adjacent second pixel opening region contours 125 and the first pixel opening region contour 115 and the spacing k3 between adjacent third pixel opening region contours 135 and the first pixel opening region contour 115 are substantially equal and are substantially equal to t1, t2, and t3. For example, in an oblique direction that is neither parallel nor perpendicular to the second direction D2, the spacing k1 between adjacent second pixel opening region contours 125 and third pixel opening region contours 135 is the maximum value (PDLGAPmax) of the spacing between pixel opening region contours; that is, this spacing k1 is greater than the spacing between any other two adjacent pixel opening region contours (any one of t1, t2, t3, k2, k3). For example, the spacing t2 between adjacent second pixel opening region contours 125 and the first pixel opening region contour 115 in the first direction D1 is the minimum value (PDLGAPmin) of the spacing between pixel opening region contours; that is, this spacing t2 is less than the spacing between any other two adjacent pixel opening region contours (any one of t1, t3, k1, k2, k3).

[0092] For example, the average line width of the first metal line 51 and the average line width of the second metal line 61 satisfy the following relationship with the spacing between adjacent two pixel opening region contours: (PDLGAPmax - PDLGAPmin)*0.5 < X < PDLGAPmax*0.167; where X is the average line width of the first metal line 51 or the average line width of the second metal line 61, and PDLGAPmax and PDLGAPmin are the maximum value and the minimum value of the spacing between pixel opening region contours, respectively.

[0093] If the line width of the first metal line 51 or the second metal line 61 is too large (for example, relative to the spacing (PDL GAP) between pixel opening region contours), it is easy to be too close to the pixel opening region, which may cause occlusion or reflection of the light emitted by the pixel opening region, and it is also easy to be recognized by the human eye, thus affecting the display effect of the display panel. If the line width is too small, it is easy to cause a broken line and will also increase the resistance of the touch electrode. By satisfying the above relationship, a suitable value for the line width of the first metal line 51 or the second metal line 61 can be obtained, thereby alleviating the above problems.

[0094] For example, the average line width of the first metal line 51 is greater than the average line width of the second metal line 61. By setting the line widths of the first metal line 51 and the second metal line 61 to be different, the overlapping area between the first metal line and the second metal line can be minimized, thereby reducing the capacitive load on the touch electrode and improving the touch sensitivity. In addition, since both the first touch sub-electrode and the second touch sub-electrode are composed of the first metal line 51, setting the line width of the first metal line 51 to be larger can help reduce the resistance of the touch sub-electrode, thereby further improving the touch sensitivity.

[0095] For example, t1 is 23 microns, t2 is 22.8 microns, and t3 is 23 microns; k1 is 27.35 microns, k2 is 22.86 microns, and k3 is 23 microns.

[0096] For example, refer to Figure 5D , the average line width X1 of the first metal line 51 is 3.5 microns, and the average line width X2 of the second metal line 61 is 3.3 microns.

[0097] For example, Figure 1B As shown, the size w1 of the first metal grid corresponding to the first pixel opening area outline 115 in the first direction D1 is 43.1 microns, and the maximum size y1 in the second direction D2 (for example, the distance between two opposite vertices of the first metal grid in the second direction D2) is 73.6 microns; the size w2 of the first metal grid corresponding to the second pixel opening area outline 125 in the first direction D1 is 31.9 microns, and the maximum size y1 in the second direction D2 (for example, the distance between two opposite vertices of the first metal grid in the second direction D2) is 72.9 microns; the size w1 of the first metal grid corresponding to the third pixel opening area outline 135 in the first direction D1 is 42.4 microns, and the maximum size y1 in the second direction D2 (for example, the distance between two opposite vertices of the first metal grid in the second direction D2) is 66.1 microns.

[0098] Figure 1D The adjacent first pixel opening area outline 115, the second pixel opening area outline 125, the third pixel opening area outline 135 and the first metal line 51 therebetween are shown. The adjacent first pixel opening area outline 115, the second pixel opening area outline 125, and the third pixel opening area outline 135 are arranged in a herringbone shape; the second pixel opening area outline 125 is adjacent to the first pixel opening area outline 115 and the third pixel opening area outline 135 in a direction that is neither parallel nor perpendicular to the second direction D2, and the first pixel opening area outline 115 and the third pixel opening area outline 135 are adjacent in the first direction D1.

[0099] like Figure 1D As shown, for example, the spacing k1 between the adjacent second pixel opening area contours 125 and the third pixel opening area contours 135, the spacing k2 between the adjacent second pixel opening area contours 125 and the first pixel opening area contours 115, and the spacing t3 between the orthographic projections of the adjacent third pixel opening area contours 135 and the first pixel opening area contours 115 on the substrate 21 are all different. In addition, since the first metal line located between the adjacent pixel opening area contours is located in the middle of the gap between the two pixel opening area contours, this may result in that the three first metal lines 51 located between the three pixel opening area contours 115, 125, and 135 do not intersect at one point, as shown in FIG. Figure 1DAs shown, the three first metal wires 51 intersect each other to define a triangle.

[0100] For example, Figure 1D As shown, the first metal grid corresponding to the second pixel opening area outline 125 includes adjacent first side x1 and second side x2, the first side x1 is neither parallel to nor orthogonal to the second direction D2, and the second side x2 is neither parallel to nor orthogonal to the second direction D2. The first side x1 is located between the second pixel opening area outline 125 and the first sub-pixel opening area outline 115, and the second side x2 is located between the second sub-pixel opening area outline 125 and the third sub-pixel opening area outline 135. For example, the lengths of the first side x1 and the second side x2 are different; for example, the first side x1 is longer than the second side x2. This asymmetry is also caused by the different gaps between the outlines of the pixel opening areas. As shown Figure 1B As shown, for example, the areas of the pixel opening area 110 of the green sub-pixel 11, the pixel opening area 120 of the red sub-pixel 12, and the pixel opening area 130 of the blue sub-pixel 13 increase in sequence. For example, the area of ​​the pixel opening area 110 of the green sub-pixel 11 is the smallest. This is because the life of the luminescent material of the green sub-pixel 11 is longer than that of the luminescent materials of other color sub-pixels. Therefore, setting the area of ​​its pixel opening area 110 to the minimum can improve the luminous uniformity and stability of the display panel.

[0101] For example, Figure 1B As shown, the first metal grid 52 covering the pixel opening area of ​​the two green sub-pixels is a hexagon, and the other first metal grids 52 directly connected to the first metal grid 52 are also hexagonal. However, the embodiment of the present disclosure is not limited to this. The first metal grid can also be a quadrilateral, a pentagon or other shapes.

[0102] like Figure 1C As shown, the display structure 30 further includes a first encapsulation layer 33 located between the light emitting element 23 and the touch control structure 40, and the encapsulation layer 33 is configured to seal the light emitting element 23 to prevent external moisture and oxygen from penetrating into the light emitting element and the driving circuit, thereby causing damage to devices such as the light emitting element 23. For example, the encapsulation layer 33 may be a single-layer structure or a multi-layer structure, such as an organic thin film, an inorganic thin film, or a multi-layer structure in which organic thin films and inorganic thin films are alternately stacked.

[0103] like Figure 1CAs shown, the touch display panel 20 further includes a buffer layer 22 located between the display structure 30 and the touch structure 40. For example, the buffer layer 22 is formed on the first encapsulation layer 33 to improve the adhesion between the touch structure 40 and the display structure 30. For example, the buffer layer 22 is an inorganic insulating layer, for example, the material of the buffer layer 22 can be silicon nitride, silicon oxide, or silicon oxynitride. For example, the buffer layer 22 can also include a structure in which silicon oxide layers and silicon nitride layers are alternately stacked.

[0104] For example, the touch display panel 20 may further include a cover plate 34 located above the touch structure 40 , and the cover plate 34 is, for example, a glass cover plate or an organic flexible cover plate.

[0105] In some other examples, a transparent protective layer (such as transparent optical adhesive) may be used instead of the cover plate 34 to protect the touch structure 40 .

[0106] For example, the base substrate 21 can be a glass substrate, a silicon substrate or a flexible substrate, and can be formed of a plastic material with excellent heat resistance and durability, such as polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET), polycarbonate, polyethylene, polyacrylate, polycarbonate, polyarylate, polyetherimide, polyethersulfone, polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polysulfone (PSF), polymethyl methacrylate (PMMA), triacetyl cellulose (TAC), cycloolefin polymer (COP) and cycloolefin copolymer (COC), etc.

[0107] Figure 2 Another pixel arrangement schematic diagram provided by an embodiment of the present disclosure is shown. Figure 1A The pixel arrangement structure shown is different in that Figure 2 In the pixel arrangement structure shown, two blue sub-pixels 13 or two red sub-pixels 12 are arranged between two adjacent green sub-pixel pairs in the first direction. For example, the two blue sub-pixels 13 are arranged along the second direction, and the two red sub-pixels 12 are arranged along the second direction.

[0108] Similarly, the pixel opening regions of the two green sub-pixels in the green sub-image pair may expose the mesh holes 520 of the same first metal grid 52 , which will not be described in detail herein.

[0109] For example, when an organic light emitting diode is prepared by using a fine metal mask (FMM) evaporation process, the light emitting layers of two adjacent red sub-pixels or blue sub-pixels can be formed through one evaporation hole, thereby reducing the difficulty of the preparation process.

[0110] In other examples, since the human eye has the lowest position sensitivity to the blue sub-pixel 13 and the brightness effect of the blue sub-pixel is also the lowest, the two adjacent blue sub-pixels 13 can be combined into one sub-pixel, that is, they share the same light-emitting element and the same pixel driving circuit, thereby reducing the process difficulty and saving process costs. For example, the pixel opening areas of the two blue sub-pixels are also combined into one.

[0111] For example, the first metal grid layer 50 includes a plurality of first touch sub-electrodes and a plurality of first connecting electrodes arranged along the first direction D1, and the plurality of first touch sub-electrodes and the plurality of first connecting electrodes are alternately distributed one by one and electrically connected in sequence to form a first touch electrode extending along the first direction; the first metal grid layer 50 also includes a plurality of second touch sub-electrodes arranged in sequence and spaced from each other along the second direction D2; each of the plurality of first touch sub-electrodes and each of the plurality of second touch sub-electrodes are spaced from each other, and respectively include a plurality of first metal grids 52 connected to each other.

[0112] For example, the touch structure further includes a second metal grid layer. With respect to the base substrate 21, the second metal grid layer is located in a layer different from the first metal grid layer. The two are connected by an insulating layer 70 (eg, Figure 1C For example, the second metal mesh layer is closer to the substrate.

[0113] refer to Figure 1C Since the second electrode 232 is a common electrode and is used to load a constant power supply voltage, the second touch electrode 420 in the first metal grid layer 50 needs to transmit the change in the touch sensing signal caused by the touch, so as to realize the touch detection function. Therefore, the first metal grid layer is arranged further away from the base substrate, that is, away from the second electrode 232, so as to avoid the constant signal in the second electrode 232 from affecting the changing signal in the second touch electrode 420, thereby affecting the accuracy of the touch detection.

[0114] The second metal grid layer includes a plurality of second metal grids defined by a plurality of second metal lines, and the orthographic projections of the plurality of second metal lines on the substrate are located outside the orthographic projections of the pixel opening areas of the plurality of sub-pixels on the substrate, that is, located within the orthographic projections of the pixel spacing areas on the substrate. The second metal grid layer includes a plurality of second connecting electrodes (that is, bridging electrodes) spaced from each other, and each of the plurality of second connecting electrodes electrically connects adjacent second touch sub-electrodes to form a second touch electrode extending in the second direction. The second connecting electrodes include a plurality of second metal grids connected to each other.

[0115] Figure 3A FIG. 4 is a schematic diagram of a touch structure 40 provided by at least one embodiment of the present disclosure. Figure 3AAs shown, the touch electrode structure includes a plurality of first touch electrodes 410 (R1-Rn) extending along a first direction D1 and a plurality of second touch electrodes 420 (T1-Tn) extending along a second direction D2. For example, the first touch electrodes 410 are touch sensing electrodes, and the second touch electrodes 420 are touch driving electrodes. However, the embodiments of the present disclosure are not limited to this. In other examples, the first touch electrodes 410 may be touch driving electrodes, and the second touch electrodes 420 may be touch sensing electrodes.

[0116] Each first touch electrode 410 includes first touch sub-electrodes 411 arranged in sequence along the first direction D1 and connected to each other, and each second touch electrode 420 includes second touch sub-electrodes 421 arranged in sequence along the second direction D2 and connected to each other. As shown in FIG3 , the main body contours of each first touch sub-electrode 411 and second touch sub-electrode 421 are both rhombus-shaped. In other examples, the first touch sub-electrode 411 and the second touch sub-electrode 421 may also be other shapes, such as triangles, strips, etc.

[0117] The adjacent first touch sub-electrodes 411 in the first direction D1 are electrically connected through a first connecting electrode (not shown) to form the first touch electrode 410 , and the adjacent second touch sub-electrodes 421 in the second direction D2 are electrically connected through a second connecting electrode (not shown) to form the second touch electrode 420 .

[0118] Each first touch electrode 410 and each second touch electrode 420 are insulated and cross each other to form a plurality of touch units 400 at the intersection, each touch unit includes a portion of each of the two first touch electrode portions connected at the intersection and at least a portion of each of the two second touch electrode portions connected at the intersection. Figure 3A An enlarged schematic diagram of a touch unit 400 is shown on the right. As shown in the figure, each touch unit 400 includes half of each area of ​​two adjacent first touch sub-electrodes 411 and half of each area of ​​two adjacent second touch sub-electrodes 421, that is, an area of ​​one first touch sub-electrode 411 and an area of ​​one second touch sub-electrode 421 on average, and the intersection point of the first touch sub-electrode 411 and the second touch sub-electrode 421 in each touch unit 400 (that is, the intersection of the first connection electrode and the second connection electrode) forms a reference point for calculating coordinates. When a finger touches the capacitive screen, the coupling between the first touch electrode and the second touch electrode near the touch point is affected, thereby changing the mutual capacitance between the two electrodes. The touch sensing signal changes according to the change in the capacitance of the touch screen, so that the coordinates of each touch point can be calculated based on the reference point. For example, the area of ​​each touch unit 400 is equivalent to the area where a person's finger contacts the touch panel. If the area of ​​the touch unit is too large, a touch blind spot may appear on the panel, and if it is too small, a false touch signal may be caused.

[0119] The average side length of each touch unit 400 is P, which is called the pitch of the touch structure. For example, the pitch P ranges from 3.7 mm to 5 mm, for example, about 4 mm; this is because the diameter of a person's finger in contact with the touch panel is about 4 mm. For example, the size of the pitch is the same as the average side length of each first touch sub-electrode 411 and the average side length of each second touch sub-electrode 421, and is also the same as the center distance between adjacent first touch sub-electrodes 411 and the center distance between adjacent second touch sub-electrodes 421.

[0120] For example, the first metal grid layer 50 further includes dummy electrodes. Figure 3A As shown, the first touch sub-electrode 411 and the second touch sub-electrode 421 respectively include a hollow area, in which a dummy electrode 430 spaced from the touch sub-electrode is provided. By providing the hollow area, the electrode area (effective area) of the touch electrode is reduced, and the capacitive load (self-capacitance) on the touch electrode is reduced, thereby reducing the load on the touch electrode and improving the touch sensitivity. For example, the dummy electrode 430 is in a floating state, that is, it is not electrically connected to other structures or does not receive any electrical signals. For example, each of the dummy electrodes 430 includes a plurality of first metal grids 52 connected to each other.

[0121] For example, the touch area is usually rectangular (see Fig.10 ), one of the touch driving electrode and the touch sensing electrode extends along the length direction of the rectangle, and the other extends along the width direction of the rectangle; the touch electrode extending along the length direction is longer, and thus has a greater load. In order to improve the touch sensitivity of the touch electrode structure, it is necessary to reduce the load on the touch electrode.

[0122] For example, the length of the second touch electrode 420 is greater than the length of the first touch electrode 410, and the total area of ​​the hollow region of the second touch electrode 420 is greater than the total area of ​​the hollow region of the first touch electrode 410 (eg, Figure 3A As shown in FIG. 1 ), the self-capacitance (parasitic capacitance) on the longer second touch electrode can be effectively and specifically reduced, thereby improving the touch sensitivity of the touch electrode structure. In addition, by providing a dummy electrode provided in the same layer as the touch electrode in the hollow area, the uniformity of the film layer can be improved, thereby improving the product yield. In some embodiments, the hollow area and the dummy electrode can be provided only in the longer second touch electrode, while the first touch electrode is not designed in this way (e.g. Figure 3B shown).

[0123] For example, each dummy electrode 430 has the same outline as the hollow area where it is located, that is, the dummy electrode and the touch sub-electrode where it is located are nested with each other; there is a boundary area between the dummy electrode and the touch sub-electrode, and they are insulated from each other through the boundary area. For example, the dummy electrode 430 and the adjacent touch sub-electrode (the first touch sub-electrode or the second touch sub-electrode) are insulated from each other through a break formed by the break of the first metal wire, that is, the first metal wire located in the boundary area forms two first metal wire segments separated by the break, one of which belongs to the dummy electrode 430 and the other belongs to the touch sub-electrode.

[0124] The average size of the boundary region (the average spacing between the dummy electrode and the touch electrode) is the minimum size that meets the design rule, for example, 3 microns to 6 microns. This can improve the uniformity of the film layer where the electrode is located and improve the process yield. For example, the first boundary region (gap) between each dummy electrode 430 and the touch sub-electrode nested therewith has the same size.

[0125] For example, Figure 3A As shown, the boundary area extends along the curve, that is, the contour of the dummy electrode is a curved structure. For example, the contour includes a sawtooth structure. This design allows the dummy electrode to cover a larger area under the same area. Since the dummy electrode and the touch sub-electrode are nested with each other, the area covered by the touch electrode is also relatively large, which can avoid blind spots caused by excessive concentration of the dummy electrodes. In addition, since the touch electrode and the dummy electrode are nested with each other, that is, the inner contour of the touch electrode is also a curved structure, this structure can increase the circumference of the inner contour compared to the straight line structure, thereby increasing the mutual capacitance of the touch electrode.

[0126] Figure 3B Schematic diagrams showing touch structures provided by other embodiments of the present disclosure are shown. Figure 3B As shown, the first touch sub-electrode 411 and the second touch sub-electrode 421 respectively include a main body and a plurality of interdigital structures 440 extending from the main body, and the first touch sub-electrode 411 and the adjacent second touch sub-electrode 421 are nested with each other in the first metal grid 50 through the interdigital structures 440 to form mutual capacitance. The interdigital structure can increase the perimeter of the touch sub-electrode under the same area, thereby effectively increasing the mutual capacitance without increasing the self-capacitance (capacitive load) of the touch sub-electrode, thereby improving the touch sensitivity. For example, the shape of the main body can be circular or rectangular, and the shape of the interdigital structure includes at least one of the following shapes: parallelogram (such as rectangle), triangle, trapezoid, hexagon.

[0127] For example, multiple interdigital structures 440 are distributed around the main body of the touch sub-electrode. For example, the main body is rectangular, and the number of second interdigital structures 112 corresponding to each side is 3-10, such as 6-10. In other examples, the main body can also be circular, and multiple interdigital structures 440 are evenly distributed on the circumference of the circle.

[0128] Figure 3B An enlarged schematic diagram of a touch control unit 400 is shown on the right. Figure 3B As shown, the first touch sub-electrodes 411 adjacent to each other in the first direction D1 are connected by the first connecting electrode 412 to form the first touch electrode 410 extending along the first direction D1, and the second touch sub-electrodes 421 adjacent to each other in the second direction D2 are connected by the second connecting electrode ( Figure 3B The second touch electrodes 420 are connected to the touch electrodes 420 (not shown) to form the second touch electrodes 420 extending along the second direction D2.

[0129] For example, the length of each interdigital structure 440 is 1 / 10-1 / 3 of the center distance between adjacent first touch sub-electrodes 411, that is, the distance between the center points of adjacent first touch sub-electrodes 411. For example, the center distance is the pitch P of the touch structure. For an irregular interdigital structure, for example, the length may be the average length, maximum length, or minimum length of the interdigital structure 440.

[0130] For example, the width of each interdigital structure 440 is 1 / 10-1 / 4 of the center distance between adjacent first touch sub-electrodes 411, for example, 1 / 10-1 / 4 of the touch structure pitch P. For an irregular interdigital structure, for example, the width can be the average width, maximum width or minimum width of the interdigital structure 440.

[0131] For example, the spacing d between adjacent interdigital structures 440 is 1 / 20-1 / 10 of the touch structure pitch P. For the case where the spacing between adjacent interdigital structures is not uniform, for example, the spacing d may be the average spacing, the maximum spacing, or the minimum spacing of the interdigital structures 440 .

[0132] Figure 4A An enlarged schematic diagram of a touch sub-electrode in the touch structure provided in some embodiments of the present disclosure is shown. The touch sub-electrode may be a first touch sub-electrode 411 or a second touch sub-electrode 421 . The first touch sub-electrode 411 is taken as an example for description below.

[0133] like Figure 4AAs shown, the first touch sub-electrode 411 includes a main body 413 and a plurality of interdigital structures 440 connected to the main body 413, and the interdigital structures 440 are distributed around the main body 413. The main body 413 includes a plurality of sides, such as a rectangle; for example, the number of interdigital structures 440 corresponding to each side is 3-10, such as 6-10.

[0134] For example, Figure 4A As shown, the dummy electrode 430 in the first touch sub-electrode 411 includes an interdigital structure 460. The extension direction of at least one interdigital structure 460 and at least one interdigital structure 440 of the first touch sub-electrode 411 are parallel to each other.

[0135] For example, the interdigital structure 440 or the interdigital structure 460 may be in a regular shape or an irregular shape, and may include at least one of the following shapes: a rectangle, a triangle, or a trapezoid. Figure 4A As shown, each interdigital structure 460 is in a convex shape, that is, a combination of two rectangles; this further increases the side length of the first touch electrode portion 411 compared to a single rectangular shape.

[0136] Figure 4B FIG. 1 is a schematic diagram showing a touch control unit in a touch control structure provided in some embodiments of the present disclosure. Figure 4B As shown, along the first direction D1, adjacent first touch sub-electrodes 411 are electrically connected to each other through the first connecting electrode 412 to form the first touch electrode 410 located on the first metal mesh layer 50; along the second direction D2, adjacent second touch sub-electrodes 421 are electrically connected to each other through the second connecting electrode 422 located on the second metal mesh layer 60 to form the second touch electrode 420. The first touch sub-electrodes 411 and the second touch sub-electrodes 421 are nested and isolated from each other in the first metal mesh layer 50 through the interdigital structure 440. Figure 4B As shown, the boundary line between the first touch sub-electrode 411 and the second touch sub-electrode 421 is sawtooth-shaped due to the existence of the interdigital structure.

[0137] Figure 5A Shows Figure 3B and Figure 4B The enlarged schematic diagram of the A region in the middle, the A region is the intersection of the first touch sub-electrode 411 and the second touch sub-electrode 421, that is, the bridge region; Figure 5B for Figure 5A Sectional view along section line BB', Figure 5D for Figure 5A Section view along section line D-D', Figure 5B and Figure 5D The specific details of the display structure are omitted.

[0138] Figure 5AThe light-colored grid in the middle schematically shows the first metal grid in the first metal grid layer 50. The first metal grid layer 50 includes the first touch electrode 410 (including the first touch sub-electrode 411 and the first connecting electrode 412) and the second touch sub-electrode 421. The first touch sub-electrode 411, the first connecting electrode 412, and the second touch sub-electrode 421 respectively include a plurality of first metal grids 52 connected to each other. Figure 5A The dark grid in the middle schematically shows the second metal grid in the second metal grid layer 60 . The second metal grid layer 60 includes the second connection electrode 422 . The second connection electrode 422 includes a plurality of second metal grids 62 connected to each other.

[0139] For example, two ends of the second connection electrode 422 are electrically connected to two adjacent second touch sub-electrodes 421 in the second direction D2 through the via holes 71 in the insulating layer 70 , thereby electrically connecting two adjacent second touch sub-electrodes 421 in the second direction D2 . Figure 5A The connection area C of the two is shown in FIG.

[0140] For example, Figure 5A As shown, the adjacent second touch sub-electrodes 421 in the second direction D2 are electrically connected through the two second connection electrodes 422. The setting of this dual-channel structure can effectively improve the yield of the device. For example, the position where the signal lines cross is prone to short circuit failure due to electrostatic breakdown of mutual capacitance. During the detection process, when a short circuit failure is detected in one channel of the two second connection electrodes 422, even if the channel is cut off (for example, by laser cutting), the circuit structure can still work normally through the other channel.

[0141] For example, the orthographic projections of the multiple first metal wires 51 in at least two first metal grids 52 in the second touch sub-electrode 421 on the second metal grid layer 60 overlap with the multiple second metal wires 61 in at least two second metal grids 62 in each of the multiple second connecting electrodes 422, so that the at least two first metal grids 52 have multiple vertices overlapping with the at least two second metal grids 62, and the multiple vertices include multiple connection vertices, and the multiple vias 71 are respectively located at the multiple connection vertices, that is, the multiple vias 71 are arranged in a one-to-one correspondence with the multiple connection vertices, and the vertices in the first metal grid 52 where the vias are arranged are called connection vertices.

[0142] It should be noted that the first metal wire / second metal wire in the present disclosure refers to a metal wire connected between two adjacent vertices of the first metal grid / second metal grid, that is, each first metal wire / second metal wire corresponds to an edge of the first metal grid / second metal grid.

[0143] For example, the at least two second metal grids 62 are edge metal grids located at the end of the second connection electrode 422; the at least two first metal grids 52 are edge metal grids located at the end of the second touch electrode 421. The first metal grid 52 and the second metal grid 62 are both polygonal.

[0144] like Figure 5A As shown, the second connection electrode 422 is electrically connected to the second touch sub-electrode 421 through the second metal wire 61a in the edge second metal grid 62a located at each end and the first metal wire 51a in the adjacent edge first metal grid 52a.

[0145] For example, the second metal line 61a is located at the edge of the second metal grid 62a closest to the second touch sub-electrode 421. For example, the first metal line 51a is located at the edge of the first metal grid 52a closest to the second connection electrode 422. This arrangement can minimize the overlap between the second touch sub-electrode 421 and the second connection electrode 422, thereby reducing the capacitive load on the touch sub-electrode and improving the touch sensitivity.

[0146] For example, combined with Figure 5A and Figure 5B As shown, at least two second metal lines 61a of the second metal grid 62a at the edge of the polygon at each end of the second connection electrode 422 and at least two first metal lines 51a of the first metal grid 52a at the edge of the polygon of the adjacent second touch sub-electrode 421 overlap in a direction perpendicular to the substrate, and are electrically connected through vias 71 in the insulating layer, so that the second connection electrode 422 is electrically connected to the second touch sub-electrode 421. For example, Figure 5A and 5B As shown, the at least two first metal wires 51a and the at least two second metal wires 61a overlap each other in a direction perpendicular to the base substrate 21, so that the edge first metal grid 52a has a plurality of vertices 53 overlapping with the edge second metal grid 62a, and the plurality of vertices 53 include a plurality of connection vertices 53a, and each via 71 is located at a connection vertex 53a, that is, the vertex 53 provided with the via 71 is the connection vertex 53a. For example, the plurality of vertices 53 of the edge first metal grid 52a and the plurality of vertices 63 of the edge second metal grid 62a overlap each other in a direction perpendicular to the base substrate 21, and each via 71 corresponds to a pair of vertices 53 / vertices 63 overlapping each other.

[0147] It should be noted that in Figure 5AIn the embodiment, the first metal grid layer 50 is closer to the viewer, so the second metal line 61a in the edge second metal grid 62a overlapping with the edge first metal grid 52a is blocked by the first metal line 51a in the edge first metal grid 52a. However, for the convenience of explanation, Figure 5A The second metal line 61 a and the metal contact pad 65 are specifically shown.

[0148] For example, in the first metal grid, among the vertices 53 adjacent to each connection vertex 53a, at most only one vertex 53 (the two adjacent vertices are located at both ends of a first metal wire 51) is a connection vertex 53a, that is, in the first metal grid layer, there are no three consecutive vertices that are connection vertices.

[0149] It should be noted that the vertices adjacent to each connection vertex refer to the vertices that are directly adjacent to the connection vertex through a metal line. As shown in FIG5A , when the first metal grid and the second metal grid are hexagonal, the number of vertices adjacent to each connection vertex is at most three.

[0150] For example, Figure 5A and 5B As shown, for each second connection electrode 422, four first metal wires 51a in the edge first metal grids 52a of the three polygons and four second metal wires 61a in the edge second metal grids 62a of the two polygons overlap each other in a direction perpendicular to the substrate, so that the edge first metal grid 52a has five vertices 53 overlapping with the edge second metal grid 62a, and the four first metal wires 51a connect the five vertices 53 in sequence (for example, along the first direction) to form a W shape; the five vertices 53 are recorded as vertex No. 1, vertex No. 2, vertex No. 3, vertex No. 4, and vertex No. 5 in sequence. For example, vertex No. 1, vertex No. 2, vertex No. 4, and vertex No. 5 are provided with vias 71, which are connecting vertices 53a, Figure 5A The connection vertices 53a are indicated by dots in FIG. The four connection vertices 53a respectively generate four effective channels 54 for transmitting the touch signal (touch driving signal or touch sensing signal) on the second touch sub-electrode 421 to the second connection electrode 422. For example, the multiple connection vertices 53a are not located on a straight line. Figure 5A As shown, the plurality of connected vertices 53a are located on two straight lines.

[0151] For example, the effective channel can be understood as the first metal wire 51 that is directly connected to the connection vertex 53a and enables the via hole 71 corresponding to the connection vertex 53a to transmit the touch signal in the second touch sub-electrode 421 to the second connection electrode 422. Therefore, the first metal wire 51 connected between two adjacent connection vertices 53a is not an effective channel, because the touch signal can be transmitted to the second connection electrode 422 through the via hole 71 corresponding to the connection vertex 53a when reaching any connection vertex 53a, without passing through the first metal wire 51.

[0152] Through the above arrangement, each connection vertex 53a can generate an effective channel, thereby minimizing the overlap between the first metal wire 51a and the second metal wire 61a.

[0153] For example, Figure 5C The left side shows an example of a vertex 63 of the second metal grid 62 without a via hole, and the right side shows an example of a vertex 63a (corresponding to the connection vertex 53a) of the second metal grid 62 corresponding to a via hole 71. Figure 5C As shown, in order to make the first metal wire 51 form a good contact with the second metal wire 61 through the via 71 at the connection vertex 53a, the second metal grid layer 60 will form a metal contact pad 65 with a larger area at the vertex 63a, resulting in the occupied area of ​​the vertex 63a being larger than the occupied area of ​​the original vertex 63. Similarly, the first metal grid layer 50 will also form a metal contact pad with a larger area at the connection vertex 53a. For example, the shape of the metal contact pad is rectangular or circular, and the size (average side length or diameter) of the metal contact pad is more than twice that of the first metal wire 51 or the second metal wire 61. Therefore, the setting of the via 71 will cause the overlapping area of ​​the first metal wire 51 and the second metal wire 61 to become larger.

[0154] Through the above configuration, each connection vertex 53a can generate an effective channel, thereby minimizing the configuration of the metal contact pad and reducing the area of ​​the metal layer. This can reduce the size of the self-capacitance of the second connection electrode 422, and can reduce the overlap between the first metal line 51 and the second metal line 61, at least from these two aspects, reduce the capacitive load of the touch sub-electrode and improve the touch sensitivity.

[0155] In other examples, for example, the vertices 53 adjacent to each connection vertex 53a in the edge first metal mesh 52a are not connection vertices. Figure 5A Each second connection electrode 422 shown can set the above-mentioned vertices No. 1, No. 3, and No. 5 as connection vertices, and the three connection vertices form three effective channels. For example, the multiple connection vertices are located on a straight line.

[0156] For example, for each second connection electrode 422 , the number of vertices at which the edge second metal mesh 62 a overlaps with the edge first metal mesh 52 a is not less than 5, and the number of the connection vertices is not less than 3.

[0157] For example, the first metal wires 51 directly connected to each connection vertex 53a are all complete, that is, they are connected between two vertices of the first metal grid 52 without any break in the middle. For example, the first metal grid 52 where each connection vertex 53a is located is complete, that is, all the first metal wires 51 in the first metal grid 52 are complete. This setting can improve the transmission efficiency and effectiveness of the touch signal from the second touch sub-electrode 421 to the second connection electrode 422.

[0158] For example, each second connection electrode 422 includes at least two connection lines. Figure 5A , a connecting line 64 is exemplarily illustrated. The connecting line 64 is composed of a plurality of second metal wires 61 connected end to end, and the two ends of the connecting line 64 correspond to a vertex 63a of a second metal grid 62 respectively, and are electrically connected to the connecting vertex 53a of the first metal grid 52 through a via 71, thereby effectively transmitting the signal between two adjacent second touch sub-electrodes 421. For example, there are no overlapping (shared) second metal wires 61 between the plurality of connecting lines 64.

[0159] For example, Figure 5A As shown, each second connection electrode 422 also includes a plurality of intermediate second metal grids 62b, and the plurality of intermediate second metal grids 62b are located between the edge second metal grids 62a at both ends of the second connection electrode 422, and connect the edge second metal grids 62a at both ends of the second connection electrode 422. The plurality of intermediate second metal grids 62b are connected in sequence, and each intermediate second metal grid 62a includes only two second metal wires 61 shared with adjacent second metal grids 62, and the two second metal wires 61 are not adjacent to each other, and are respectively shared by the intermediate second metal grid 62a and the two second metal grids 62 adjacent thereto. Each intermediate second metal grid 62b includes two second metal wires 61 parallel to the second direction D2, and each of the two second metal wires 61 is located at the edge of the second connection electrode 244, that is, it belongs exclusively to the intermediate second metal grid 62b and is not shared by the two second metal grids. In this case, as Figure 5A As shown, each second connection electrode 422 includes two connection lines 64 .

[0160] For example, Figure 5AAs shown, the orthographic projection of each first connecting electrode 412 on the second metal grid layer 60 is located in the gap between two second connecting electrodes 422 between adjacent second touch sub-electrodes 421, that is, the first metal wire 51 in the first connecting electrode 412 and the second metal wire 61 in the second metal grid layer 60 do not overlap in the direction perpendicular to the substrate. Figure 5A The dotted line in FIG. 4 shows the range of the first connection electrode 412. Figure 5A As shown, the first connection electrode 412 is insulated from the adjacent second touch sub-electrode 421 by a break, and the break is located at the end of the first metal line 51 in the first connection electrode 412. For example, the first connection electrode 412 also forms a break at the end of the first metal line 51 to avoid overlapping with the second connection electrode 422 in a direction perpendicular to the substrate, thereby reducing the capacitive load on the touch electrode.

[0161] For example, Figure 5A As shown, the second metal grids 62 in the second connection electrodes 422 are all complete grids, and there are no breaks in the second metal wires 61 in the second metal grids 62. This is because the number of metal grids in the second connection electrodes 422 is small, which can improve the yield of the second connection electrodes 422 and ensure effective signal transmission.

[0162] For example, Figure 5A As shown, the first metal wires 51 located at the first connection electrodes 412 have no breaks, and the edge first metal grids 52 located at the edges of the first connection electrodes 412 have defects, such as at least one edge is missing, so that the second metal wires 61 do not overlap with the first metal wires 51.

[0163] For example, Figure 5A As shown, each first touch sub-electrode 411 is electrically connected to an adjacent first connection electrode 412 via at least one connection line 51b formed by a plurality of first metal wires 51 connected end to end in sequence; when there are a plurality of connection lines 51b, the plurality of connection lines 51b are spaced apart from each other. Figure 5A The connection line 51b shown in FIG. 5 includes three first metal lines 51. For example, each first metal line 51 in the connection line 51b overlaps with the second metal line 61 in the second connection electrode 422 in a direction perpendicular to the base substrate, thereby not affecting the pixel aperture ratio.

[0164] Figure 5E Shows Figure 3B and Figure 4B Another example of a magnified schematic of area A in center. Figure 5EThe light-colored grid in the middle schematically shows the first touch electrode 410 and the second touch sub-electrode 421 in the second touch electrode 420. The first touch electrode 410 includes the first touch sub-electrode 411 and the first connecting electrode 412. The first touch sub-electrode 411, the first connecting electrode 412 and the second touch sub-electrode 421 respectively include a plurality of first metal grids 52 connected to each other; that is, the light-colored grid is the first metal grid 52 located in the first metal grid layer 50. Figure 5E The dark grid in the middle schematically shows the second connection electrode 422 in the second touch electrode 420, and the second connection electrode 422 includes a plurality of second metal grids 62 connected to each other. Therefore, the dark grid is the second metal grid 62 located in the second metal grid layer 60. The range of the first connection electrode 412 is enclosed by a dotted line in the figure.

[0165] and Figure 5A The embodiment shown is different in that Figure 5E In the illustrated embodiment, the second connection electrode 422 includes a greater number of intermediate second metal grids 62b, and a greater number of connection lines 51b (three are shown in the figure) electrically connecting each first touch sub-electrode 411 to an adjacent first connection electrode 412. Figure 5E As shown, the plurality of connection lines 51 b are spaced apart from each other, and the first metal lines 51 in two adjacent connection lines 51 b are not directly connected by a first metal line 51 .

[0166] It should be noted that in Figure 5E In the embodiment, the first metal grid layer 50 is closer to the viewer, so the second metal line 61a in the edge second metal grid 62a overlapping with the edge first metal grid 52a is blocked by the first metal line 51a in the edge first metal grid 52a. However, for the convenience of explanation, Figure 5E The second metal line 61 a and the metal contact pad 65 are specifically shown.

[0167] For example, Figure 5A As shown, among the first metal wires at the edge of the first connection electrode 412, except for the first metal wire electrically connected to the connection wire 51b, the rest of the first metal wires have a break (notch) formed at the end away from the first connection electrode 412. Figure 5E As shown, the first connection electrode 412 also includes an edge first metal wire with a middle break, and the break separates a first metal wire 51 into two first metal wire segments, and the two first metal wire segments belong to the first connection electrode 412 and the second touch sub-electrode 421 adjacent to the first connection electrode 412, thereby achieving insulation between the first connection electrode 412 and the second touch sub-electrode 421. Figure 5A and 5DAs shown, for example, there is no common first metal wire 51 between the first metal grid 52 in the first touch sub-electrode 411 and the first metal grid 52 in the first connection electrode 412 , that is, the two are not electrically connected through the common first metal wire 51 .

[0168] This arrangement can minimize the overlap of the metal wires in the first touch sub-electrode 411 and the second connecting electrode 422, thereby reducing the mutual capacitance between the two. When the mutual capacitance value between the first touch electrode 410 and the second touch electrode 420 changes due to a touch signal, the change is easier to detect because the reference mutual capacitance value is small, thereby improving the sensitivity of touch detection.

[0169] Fig. 6A and Figure 6B They are shown respectively Figure 3B Two examples of the enlarged schematic diagram of area B, the area B involves two first touch sub-electrodes 411 adjacent and insulated in the second direction D2 and two second touch sub-electrodes 421 adjacent and insulated in the first direction D1, and the area B is an isolation area for the four touch sub-electrodes.

[0170] For example, Figure 5D As shown, the average line width X1 of the first metal line 51 is greater than the average line width X2 of the second metal line 61. For example, in the width direction of the metal line, the orthographic projection of the second metal line 61 on the base substrate 21 is located within the orthographic projection of the first metal line 51 on the base substrate 21, which can effectively improve the aperture ratio of the display substrate.

[0171] Fig. 6A The metal grids shown are all located in the first metal grid layer, that is, they are all first metal grids, wherein the light-colored grids represent the first metal grids in the adjacent first touch sub-electrodes 411 , and the dark-colored grids represent the first metal grids in the two adjacent second touch sub-electrodes 421 .

[0172] like Fig. 6A As shown, the first touch sub-electrode 411 and the second touch sub-electrode 421 are adjacent to each other, and the multiple first metal wires 51 located in the boundary area between the two include multiple breaks (spaces) 510 respectively. Each break 510 is, for example, located in the middle of the first metal wire 51, and the first metal wire 51 is separated into two first metal wire segments 51f. One of the two first metal wire segments 51f belongs to the first touch sub-electrode 411, and the other belongs to the second touch sub-electrode 421, thereby insulating the adjacent first touch sub-electrode 411 and the second touch sub-electrode 421.

[0173] It should be noted that, in the embodiment of the present disclosure, the first metal wire segment belongs to the touch sub-electrode, which means that there is an electrical connection relationship between the first metal wire segment and the touch sub-electrode.

[0174] In the touch structure provided in at least one embodiment of the present disclosure, adjacent and insulated touch sub-electrodes (for example, between adjacent first touch sub-electrodes and second touch sub-electrodes, between two adjacent second touch sub-electrodes in a first direction, and between two adjacent first touch sub-electrodes in a second direction) are insulated by breaks formed by broken metal wires; compared with insulation through the provision of dummy electrodes, this provision can maximize the setting area of ​​the touch electrodes, increase the density of the touch electrodes, and thus improve the touch sensitivity.

[0175] For example, Fig. 6A As shown, the edge metal grid of each touch sub-electrode is incomplete, that is, it includes a part of the first metal grid, and the edge metal grids in adjacent touch sub-electrodes match each other to define the first metal grid.

[0176] For example, at least one first metal grid includes three first metal grid parts that are insulated from each other, and the three first metal grid parts respectively belong to a first touch sub-electrode and two second touch sub-electrodes that are adjacent in the first direction D1. For example, the first metal grid is hexagonal, and at least two first metal grids include the above-mentioned three insulated first metal grid parts.

[0177] like Fig. 6A and Figure 6B As shown, Fig. 6A and Figure 6B , each of the two first metal grids 52c in the dotted circle includes three first metal grid parts insulated from each other, and the three first metal grid parts respectively belong to three touch sub-electrodes insulated from each other, and the three touch sub-electrodes include two first touch sub-electrodes 411 adjacent to each other in the second direction D2 and a second touch sub-electrode 421 located between the two first touch sub-electrodes (such as Fig. 6A ), or the three touch sub-electrodes include two second touch sub-electrodes 421 adjacent to each other in the first direction D1 and a first touch sub-electrode 411 located between the two second touch sub-electrodes 421 (as shown in FIG. Figure 6B This design allows for effective insulation between the touch sub-electrodes while making their arrangement more compact, thereby improving touch sensitivity.

[0178] For example, Fig. 6A and 6B As shown, there is a break 510 on each of the three sides of each metal grid 52c, thereby dividing the metal grid into three parts.

[0179] For example, Fig. 6A and 6B As shown, the first metal grid 52c is a polygon, such as a hexagon, which includes two sides parallel to the second direction D2 and opposite to each other. The first metal wire 51 located on at least one side of the first metal grid 52c has a break, which separates the first metal wire into two first metal wire segments 51f. Fig. 6A As shown, the two first metal wire segments 51f respectively belong to two first touch sub-electrodes 411 adjacent to each other in the second direction. Figure 6B As shown, the two first metal wire segments 51 f belong to the adjacent first touch sub-electrode 411 and the second touch sub-electrode 421 respectively.

[0180] For example, Fig. 6A and 6B As shown, the polygons of the two first metal grids 52c share one edge, that is, the two first metal grids 52c share one first metal wire 51g. There is a break 510 on the first metal wire 51g, which separates the first metal wire 51g into two spaced first metal wire segments.

[0181] For example, Fig. 6A As shown, the two first metal grids 52c are arranged along the first direction D1, and the shared first metal line 51g is parallel to the second direction D2. The two first metal line segments in the shared first metal line 51g respectively belong to two first touch sub-electrodes 411 adjacent in the second direction D2; that is, the two first touch sub-electrodes 411 adjacent in the second direction D2 are directly adjacent to each other through the break or are separated from each other through the break. For example, the two second touch sub-electrodes 421 adjacent in the first direction D1 are separated from each other by a part of the two first touch sub-electrodes 411 adjacent in the second direction D2.

[0182] For example, Figure 6B As shown, the arrangement direction of the two first metal grids 52c is neither parallel nor perpendicular to the second direction D2, and the shared first metal line 51g is neither parallel nor perpendicular to the second direction D2. The two first metal line segments in the shared first metal line 51g respectively belong to two second touch sub-electrodes 421 adjacent in the first direction D1; that is, the two second touch sub-electrodes 421 adjacent in the first direction D1 are directly adjacent to each other through the break or are separated from each other by the break. For example, the two first touch sub-electrodes 411 adjacent in the second direction D2 are separated from each other by a part of the two second touch sub-electrodes 421 adjacent in the first direction D1.

[0183] For example, Fig. 6A and 6BAs shown, each of the three first metal grid parts of one of the two first metal grids 52c includes a complete first metal wire 51; the number of first metal wires included in the three first metal grid parts of the other first metal grid 52c is different from each other, for example, the numbers are 0, 1, and 2 respectively.

[0184] like Fig. 6A and Figure 6B As shown, each first metal grid portion includes two first metal wire segments 51f, or only includes two first metal wire segments 51f; or includes a complete first metal wire 51 and two first metal wire segments 51f, and the first metal wire 51 is connected between the two first metal wire segments 51f; or includes two complete first metal wires 51 and two first metal wire segments 51f, and the two first metal wires 51 are connected between the two first metal wire segments 51f.

[0185] The inventors found that at the boundary between the first touch sub-electrode and the second touch sub-electrode, there are metal wire breaks with a high density per unit area due to insulation through wire breaks. When these breaks have a certain regular continuity, the reflection of ambient light at the break and the metal wire is significantly different, resulting in a highly visible gap shadow on the final product, which greatly affects the user experience. For example, when the touch structure is applied to a display device, the shadow will reduce the display quality.

[0186] At least one embodiment of the present disclosure also provides a touch structure, wherein a plurality of breaks on a first metal line located at a boundary area between a first touch sub-electrode and a second touch sub-electrode include a plurality of first breaks located on the first line, the plurality of first breaks are respectively located on a plurality of first metal lines intersecting with the first line, and the first line extends approximately in a certain direction; there is at least one first metal line between at least two first breaks, the at least one first metal line intersects with the first line, and the at least one first metal line has no break at the intersection with the first line.

[0187] Through this setting, the continuity of the fracture in the boundary area can be effectively broken to achieve the purpose of shadow elimination.

[0188] It should be noted that the first line can be a straight line or a curve extending roughly in a certain direction, such as a broken line. Due to process fluctuations, the multiple first fractures are not necessarily strictly located on a straight line, but fluctuate up and down relative to the straight line. As long as the curve extends roughly in a fixed direction, the embodiment also falls within the protection scope of the present disclosure.

[0189] In some examples, the first line is a first straight line. For example, the plurality of first fractures are respectively located on a plurality of first metal lines that are orthogonal to the first straight line.

[0190] The touch structure provided by at least one embodiment of the present disclosure is exemplarily described below by taking the first line as a first straight line as an example, but this is not intended to limit the present disclosure.

[0191] Fig. 7A A shadow diagram of a metal wire fracture design. As shown in the figure, multiple fractures 510' on multiple metal wires 51' are continuously located on a straight line without interruption in the middle. For example, there is no metal wire in the middle of the multiple fractures 510', and there is no fracture at the intersection of the metal wire and the straight line. The arrangement of the metal wires produces a visually obvious shadow (shadow NG).

[0192] Figure 7B A simulation diagram of the shadow elimination design of the touch structure provided in at least one embodiment of the present disclosure. As shown in the figure, multiple fractures 510 on multiple parallel metal lines are located on a straight line L orthogonal to the metal lines, and no fracture is set at the intersection of the metal line 51 between at least two fractures 510 on the straight line L and the straight line, thereby significantly improving the shadow problem (shadow OK).

[0193] Figure 8 A schematic diagram of a touch structure provided by at least some embodiments of the present disclosure is shown. Figure 8 The right side of FIG. 1 shows a schematic diagram of a touch control unit in the touch control structure. Figure 8 The left side shows an enlarged schematic diagram of the boundary area between the first touch sub-electrode 411 and the second touch sub-electrode 421 of the touch structure; for example, the light-colored grid illustrates the first metal grid in the first touch sub-electrode 411, and the dark-colored grid illustrates the first metal grid in the second touch sub-electrode 421.

[0194] like Figure 8 As shown, in the boundary region between the first touch sub-electrode 411 and the second touch sub-electrode 421, there are a plurality of first breaks 510a located on the first straight line L1, and the plurality of first breaks are respectively located on a plurality of first metal lines 51 orthogonal to the first straight line L1, and the plurality of first metal lines 51 are parallel to each other, for example, parallel to the second direction D2. There is at least one first metal line 51c (such as Figure 8 The first metal wire 51c intersects with the first straight line L1 and there is no break at the intersection.

[0195] By disposing the first metal wire 51c, the continuity of the multiple break points 510a on the first straight line L1 is broken, thereby effectively achieving the effect of eliminating shadows.

[0196] It should be noted that the above-mentioned multiple first breaks all refer to the breaks between two touch sub-electrodes (such as adjacent first touch sub-electrodes and second touch sub-electrodes, two second touch sub-electrodes adjacent in the first direction, and two first touch sub-electrodes adjacent in the second direction) to break the regularity of the local break arrangement.

[0197] For example, the first straight line L1 is parallel to the first direction D1, that is, the same as the extension direction of the first touch electrode 410; for example, the first metal line 51c is parallel to the first metal line 51 with the first break; for example, the first metal line 51c is parallel to the second direction D1. For example, there is no break on the first metal line 51c.

[0198] For example, the first metal wires 51e directly connected to one end of the first metal wire 51c all have breaks, so that the first touch sub-electrode 411 and the second touch sub-electrode 421 are insulated; at least one of the first metal wires directly connected to the other end of the first metal wire 51c does not have a break, so that the first metal wire 51c and the touch sub-electrode (such as Figure 8 As shown, the main body of the second touch sub-electrode 421 is electrically connected.

[0199] For example, the first metal grid 52 is a polygon, including more than four sides, such as a pentagon or a hexagon. This arrangement can diversify the extension direction of the sides of the metal grid, so that the arrangement of the fractures on the metal wire is not likely to have regular continuity. However, this is not a limitation of the embodiments of the present disclosure.

[0200] like Figure 8 As shown, the first metal grid is hexagonal; the extension direction of the first metal wire 51e is inclined with respect to the extension direction of the first metal wire 51c; for example, the extension direction of the first metal wire 51e is neither parallel nor perpendicular to the first direction D1.

[0201] Fig. 9 A schematic diagram of a touch structure provided by another embodiment of the present disclosure is shown, and the boundary area between the first touch sub-electrode 411 and the second touch sub-electrode 421 of the touch structure is shown in the figure; for example, the light-colored grid illustrates the first metal grid in the first touch sub-electrode 411, and the dark-colored grid illustrates the first metal grid in the second touch sub-electrode 421. The figure shows a first straight line L1. Figure 8 The difference between the embodiment shown is that the first metal grid in this embodiment is a quadrilateral, for example, a rectangle. Figure 8 The description of the illustrated embodiment will not be repeated here.

[0202] For example, there is also a break in the first metal wire 51 inside the first touch sub-electrode 411 or the second touch sub-electrode 421, thereby reducing the difference in reflective light emission between the first metal wire inside the touch sub-electrode and the first metal wire at the boundary, thereby improving user experience. For example, the break inside the touch sub-electrode separates the first metal wire into two first metal wire segments, and the two first metal wire segments both belong to the same touch sub-electrode.

[0203] For example, the fracture density inside the touch sub-electrode is comparable to the fracture density at the boundary, thereby improving display uniformity and process uniformity.

[0204] For example, the fracture design rules inside the touch sub-electrode are similar to the fracture design rules at the boundary.

[0205] For example, the break 510 is located in the middle of the first metal wire 51 .

[0206] The following combination Figure 8 The internal fracture of the first touch sub-electrode is used as an example to illustrate the internal fracture of the touch sub-electrode of the touch structure provided by the embodiment of the present disclosure.

[0207] For example, Figure 8 As shown, the breaks of the first metal wire located inside the first touch sub-electrode 411 include a plurality of second breaks 510b located on the second straight line L2, and the plurality of second breaks 510b are respectively located on a plurality of first metal wires 51 that are orthogonal to the second straight line L2; there is at least one first metal wire 51d between at least two second breaks 510b, the first metal wire 51d intersects with the second straight line L2, and there is no break on the first metal wire 51d at the intersection with the second straight line.

[0208] For example, the second straight line L2 is parallel to the first direction D1.

[0209] This setting can effectively break the continuity of the fracture inside the touch sub-electrode and realize the shadow elimination design.

[0210] For example, Figure 8 As shown, inside the first touch sub-electrode 411 , each first metal grid has at most two first metal wires with breaks, thereby ensuring effective electrical connection.

[0211] For example, a similar fracture design can also be performed for the boundary area between the dummy electrode 430 and the touch sub-electrode in the touch sub-electrode (the first touch sub-electrode or the second touch sub-electrode). For example, the multiple first metal wires located in the boundary area between the touch sub-electrode and the dummy electrode respectively include multiple fractures, each of the multiple fractures separates the first metal wire into two first metal wire segments, one of the two first metal wire segments belongs to the touch sub-electrode, and the other belongs to the dummy electrode, so that the touch sub-electrode and the dummy electrode are insulated. The multiple fractures include multiple third fractures located on a third straight line, and the multiple third fractures are respectively located on multiple first metal wires intersecting the third straight line; there is at least one first metal wire between at least two third fractures, each of the at least one first metal wire intersects the third straight line, and each of the at least one first metal wire does not have a fracture at the intersection with the third straight line. For example, Figure 8 The enlarged schematic diagram on the left is considered to correspond to the boundary area between the touch sub-electrode and the dummy electrode (for example Figure 8 A similar understanding is made for the S area shown in the enlarged schematic diagram, where the dark grid and the light grid in the enlarged schematic diagram are respectively understood as the first metal grid in the touch sub-electrode and the first metal grid in the dummy electrode, and the first straight line L1 in the figure is understood as the third straight line.

[0212] This arrangement can effectively break the continuity of the boundary area between the touch sub-electrode and the dummy electrode inside it, thereby realizing a shadow elimination design.

[0213] The embodiment of the present disclosure further provides a touch panel, comprising the above touch structure.

[0214] Fig.10 Schematic diagram of a touch panel provided by at least one embodiment of the present disclosure. Fig.10 As shown, the touch panel 80 includes a touch area 301 and a non-touch area 302 outside the touch area 301, and the touch structure 40 is located in the touch area 301. For example, the first touch electrode 410 extends along the width direction of the rectangle, and the second touch electrode 420 extends along the length direction of the rectangle. For the sake of clarity, the structure of the first touch electrode and the second touch electrode is not shown in detail in the figure.

[0215] For example, Fig.10 As shown, the touch panel 80 also includes a plurality of signal lines 450 located in the non-touch area 302. Each first touch electrode 410 and each second touch electrode 420 are respectively electrically connected to a signal line 450, and are connected to a touch controller or a touch integrated circuit (not shown in the figure) through the signal line. For example, the first touch electrode 410 is a touch driving electrode, and the second touch electrode 420 is a touch sensing electrode, but the embodiment of the present disclosure is not limited to this.

[0216] The touch integrated circuit is, for example, a touch chip, which is used to provide a touch drive signal to the second touch electrode 420 in the touch panel 80 and to receive a touch sensing signal from the first touch electrode 410 and to process the touch sensing signal, for example, to provide the processed data / signal to a system controller to implement a touch sensing function.

[0217] For example, Fig.10 As shown, the ends of the plurality of signal lines 450 connected to the touch control integrated circuit may be arranged on the same side of the touch control area 301 (eg Fig.10 This facilitates connection with the touch integrated circuit.

[0218] For example, Fig.10 As shown, since the second touch electrode 420 is longer than the first touch electrode 410 and has a heavier load, in order to increase the signal transmission speed, a signal line 450 can be set at both ends of a first touch electrode 410. When working, the touch integrated circuit simultaneously inputs touch drive signals (bilateral drive) to a second touch electrode 420 in both directions through two signal lines 450, so that the speed of signal loading on the second touch electrode 420 is increased, thereby improving the detection speed.

[0219] For example, the material of the first metal grid layer 50 or the second metal grid layer 60 includes metal materials such as aluminum, molybdenum, copper, silver, etc., or alloy materials of these metal materials, such as silver-palladium-copper alloy (APC) material.

[0220] For example, the width of each fracture (the dimension along the length direction of the metal line) is 5.2 microns.

[0221] For example, the material of the insulating layer 70 may be an inorganic insulating material, for example, the inorganic insulating material is a transparent material, for example, the inorganic insulating material is silicon oxide, silicon nitride, silicon oxynitride, or other silicon oxide, silicon nitride, or aluminum oxide, titanium nitride, or other metal oxynitride insulating materials.

[0222] For example, the material of the insulating layer 70 may also be an organic insulating material to obtain good bending resistance. For example, the organic insulating material is a transparent material. For example, the organic insulating material is an OCA optical glue. For example, the organic insulating material may include polyimide (PI), acrylate, epoxy resin, polymethyl methacrylate (PMMA), etc.

[0223] The embodiment of the present disclosure further provides an electronic device, which includes the above-mentioned touch structure 40, the above-mentioned touch display panel 20 or the above-mentioned touch panel 80. For example, the electronic device is a touch display device integrated with a touch function, and the touch display device can be: a display, an OLED panel, an OLED TV, an electronic paper, a mobile phone, a tablet computer, a laptop computer, a digital photo frame, a navigator, or any other product or component with a display function and a touch function.

[0224] Fig.11 A schematic diagram of an electronic device provided by an embodiment of the present disclosure is shown. For example, the electronic device 90 is a touch display device, and the touch display device includes a touch panel 80 and a display panel 81, and the display panel 81 is stacked with the touch panel 80. The display panel 81 includes a display area 802 and a non-display area 801. For example, the display area 801 and the touch area 301 are aligned with each other so as to correspond to each other, and the non-display area 802 and the non-touch area 302 are aligned with each other so as to correspond to each other. The display panel 81 and the touch panel 80 are fixed to each other, for example, by adhesive, or are formed as one piece, that is, the touch panel 80 is directly formed on the display panel 81 with the display panel 81 as a substrate.

[0225] The above description is merely an exemplary embodiment of the present disclosure and is not intended to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A touch structure, comprising a first metal grid layer and a second metal grid layer, wherein the first metal grid layer and the second metal grid layer are separated by an insulating layer located between the first metal grid layer and the second metal grid layer, the first metal grid layer comprises a plurality of first metal grids defined by a plurality of first metal lines, the second metal grid layer comprises a plurality of second metal grids defined by a plurality of second metal lines, and each of the plurality of first metal grids and each of the second metal grids are polygonal; in, The first metal grid layer includes a plurality of first touch sub-electrodes and a plurality of first connection electrodes arranged along a first direction, wherein the plurality of first touch sub-electrodes and the plurality of first connection electrodes are alternately arranged one by one and electrically connected in sequence to form first touch electrodes extending along the first direction; the first metal grid layer also includes a plurality of second touch sub-electrodes arranged in sequence and spaced from each other in a second direction, wherein the first direction intersects the second direction; each of the plurality of first touch sub-electrodes and each of the second touch sub-electrodes are spaced from each other and each includes a plurality of first metal grids; The second metal grid layer includes a plurality of second connection electrodes spaced apart from each other, each of the plurality of second connection electrodes being electrically connected to an adjacent second touch sub-electrode through a plurality of via holes in the insulating layer, thereby electrically connecting the adjacent second touch sub-electrodes to form a second touch electrode extending in the second direction; The orthographic projections of the plurality of first metal wires in the at least two first metal grids in the second touch sub-electrodes on the second metal grid layer overlap with the plurality of second metal wires in the at least two second metal grids in the corresponding second connection electrodes, respectively, so that the at least two first metal grids have a plurality of vertices overlapping with the at least two second metal grids, the plurality of vertices include a plurality of connection vertices, and the plurality of vias are arranged at the plurality of connection vertices in a one-to-one correspondence; Among the vertices adjacent to each of the plurality of connected vertices, at most one vertex is a connected vertex; Adjacent second touch sub-electrodes are electrically connected via two of the second connecting electrodes. The two second connection electrodes are arranged spaced apart from each other; The orthographic projection of each of the plurality of first connecting electrodes on the second metal grid layer is located in a gap between two second connecting electrodes between adjacent second touch sub-electrodes, Each of the plurality of first touch sub-electrodes is electrically connected to an adjacent first connection electrode through at least one first connection line formed by a plurality of first metal lines sequentially connected end to end.

2. The touch control structure according to claim 1, wherein: The adjacent vertices of each connected vertex are not connected vertices.

3. The touch control structure according to claim 1, wherein: The number of the plurality of vertices is not less than 5, and the number of the plurality of connected vertices is not less than 3.

4. The touch control structure according to claim 1, wherein: The at least two second metal grids are edge metal grids of the second connecting electrode.

5. The touch control structure according to claim 1, wherein: The at least two first metal grids are edge metal grids of the second touch sub-electrode.

6. The touch control structure according to claim 1, wherein: The plurality of connected vertices are not located on a straight line.

7. The touch control structure according to claim 1, wherein: The plurality of connected vertices are located on a straight line.

8. The touch control structure according to claim 1, wherein: There is no break in the first metal wire in the first metal mesh that is directly connected to the connection vertex.

9. The touch control structure according to claim 1, wherein: Each of the plurality of second connection electrodes comprises at least two second connection lines, and each of the at least two second connection lines comprises a plurality of second metal lines connected end to end in sequence. Two ends of each of the at least two second connecting lines are electrically connected to a connection vertex of the first metal grid through one of the via holes.

10. The touch control structure according to claim 1, wherein: Each of the plurality of first metal grids and each of the second metal grids is a hexagon; At least one second connecting electrode includes two edge second metal meshes located at each end; The four second metal wires of the two edge second metal grids of the second connection electrode overlap with the four first metal wires of the three edge first metal grids in the adjacent second touch sub-electrode in a direction perpendicular to the second metal grid layer, so that the three edge first metal grids have five vertices overlapping with the two second metal grids; The four first metal wires connect the five vertices in sequence to form a W shape; the five vertices are vertex No. 1, vertex No. 2, vertex No. 3, vertex No. 4 and vertex No. 5 in sequence.

11. The touch control structure according to claim 10, wherein: The second touch sub-electrode is electrically connected to the second connection electrode through four via holes, and the four via holes are respectively located at the first vertex, the second vertex, the fourth vertex, and the fifth vertex.

12. The touch control structure according to claim 10, wherein: The second connection electrode further comprises a plurality of middle second metal grids, wherein the plurality of middle second metal grids are located between the edge second metal grids at both ends of the second connection electrode and connect the edge second metal grids at both ends; The plurality of middle second metal grids are connected in sequence, and each middle second metal grid includes two second metal lines parallel to the second direction, and each of the two second metal lines is located at an edge of the second connection electrode.

13. The touch control structure according to claim 1, wherein: The orthographic projections of the plurality of first metal wires connected end to end in sequence on the second metal grid layer overlap with the plurality of second metal wires in the second connection electrode respectively.

14. The touch control structure according to claim 1, wherein: Multiple first metal wires located in the boundary area between adjacent first touch sub-electrodes and second touch sub-electrodes respectively include multiple breaks, each of the multiple breaks divides the first metal wire into two first metal wire segments, one of the two first metal wire segments belongs to the first touch sub-electrode, and the other belongs to the second touch sub-electrode, thereby insulating the adjacent first touch sub-electrode and the second touch sub-electrode.

15. The touch control structure according to claim 14, wherein: The plurality of fractures include a plurality of first fractures located on a straight line, and the plurality of first fractures are respectively located on a plurality of first metal wires orthogonal to the straight line. There is at least one first metal wire between the at least two first breaks, the at least one first metal wire intersects the straight line, and there is no break at the intersection of the at least one first metal wire and the straight line.

16. The touch control structure according to claim 1, wherein: The first metal grid layer includes a plurality of first touch electrodes arranged along the second direction, At least one first metal grid includes three first metal grid parts insulated from each other, and the three first metal grid parts respectively belong to three touch sub-electrodes insulated from each other. The three touch sub-electrodes include two first touch sub-electrodes adjacent to each other in the second direction and a second touch sub-electrode located between the two first touch sub-electrodes, or two second touch sub-electrodes adjacent to each other in the first direction and a first touch sub-electrode located between the two second touch sub-electrodes.

17. A touch display panel, comprising a base substrate, a display structure stacked on the base substrate, and a touch structure according to any one of claims 1 to 16.

18. The touch display panel according to claim 17, wherein: The display structure includes a plurality of sub-pixels, each of the plurality of sub-pixels includes a light-emitting element and a pixel opening region exposing the light-emitting element; The orthographic projections of the plurality of first metal lines and the plurality of second metal lines on the base substrate are both located outside the orthographic projections of the plurality of pixel opening areas of the plurality of sub-pixels on the base substrate.

19. The touch display panel according to claim 18, wherein: The orthographic projection of at least one mesh of the first metal grid on the base substrate covers the orthographic projection of two pixel opening areas of two adjacent sub-pixels on the base substrate, and the two adjacent sub-pixels are first sub-pixels configured to emit light of the same first basic color; The center distance between the two pixel opening areas is smaller than the center distance between the two pixel opening areas of two sub-pixels emitting light of the same other basic color.

20. The touch display panel according to claim 18, wherein: The plurality of sub-pixels are distributed in a plurality of pixel units, and each of the plurality of pixel units is configured as full-color light; The two first sub-pixels belong to two pixel units respectively.

21. An electronic device, comprising the touch structure according to any one of claims 1 to 16 or the touch display panel according to any one of claims 17 to 20.

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