Touch display panel and electronic device

Abstract

A touch display panel and an electronic device, the touch display panel comprising a substrate, a display structure and a touch structure which are stacked on the substrate, the touch structure comprising a first metal mesh layer, a mesh hole of at least one first metal mesh in the first metal mesh layer covers the orthographic projection of two pixel opening regions of two adjacent sub-pixels on the substrate, the two adjacent sub-pixels are configured to emit light of the same first primary color; the center distance of the two pixel opening regions is smaller than the center distance of two pixel opening regions of two sub-pixels emitting light of the same other primary color. The touch display panel has better display effect.

Description

[0001] This application is a divisional application of the patent application No. 202080000457.6 titled "Touch display panel and electronic device" filed on April 1, 2020. TECHNICAL FIELD

[0002] Embodiments of the present disclosure relate to a touch display panel and an electronic device. BACKGROUND

[0003] User interfaces with touch function 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 arrangement of the touch electrode structure is an important factor affecting user experience. SUMMARY

[0004] At least one embodiment of the present disclosure provides a touch display panel, comprising a substrate, and a display structure and a touch structure stacked on the substrate, the display structure comprises a plurality of sub-pixels, the plurality of sub-pixels are arranged along a first direction and a second direction, each of the plurality of sub-pixels comprises a light emitting element and a pixel opening area exposing the light emitting element; the first direction and the second direction intersect; the touch structure comprises a first metal mesh layer, the first metal mesh layer comprises a plurality of first metal meshes defined by a plurality of first metal lines, the orthogonal projection of the plurality of first metal lines on the substrate is located outside the orthogonal projection of the plurality of pixel opening areas of the plurality of sub-pixels on the substrate; the orthogonal projection of the mesh hole of each of at least one first metal mesh on the substrate covers the orthogonal projection of the two pixel opening areas of the two adjacent sub-pixels on the substrate, the two adjacent sub-pixels are first sub-pixels configured to emit light of the same first primary color; the center distance of the two pixel opening areas of the two first sub-pixels is smaller than the center distance of the two pixel opening areas of the two sub-pixels emitting light of the same other primary color.

[0005] In some examples, the area of the two pixel opening areas of the two first sub-pixels is equal and smaller than the area of the pixel opening area of the sub-pixel emitting light of the other primary color.

[0006] In some examples, the plurality of sub-pixels are distributed in a plurality of pixel units, each of the plurality of pixel units is configured to emit full-color light; the two first sub-pixels respectively belong to two pixel units.

[0007] In some examples, each sub-pixel emitting light different from the first primary color is configured to be shared by at least two pixel units.

[0008] In some examples, the first primary color is green.

[0009] In some examples, the orthographic projection of the mesh of the other first metal grid directly connected with the at least one first metal grid on the substrate substrate covers the orthographic projection of only one sub-pixel pixel opening region on the substrate substrate.

[0010] In some examples, the plurality of first metal grids are arranged along the first direction and the second direction; each of the plurality of first metal grids is a hexagon; the extension direction of the longest side of each first metal grid is parallel to each other and along the second direction.

[0011] In some examples, the pixel opening region contour of the pixel opening region corresponding to each first metal grid is a hexagon, and the six sides of the each first metal grid are parallel to the six sides of the corresponding pixel opening region contour; the two sides of the adjacent two pixel opening region contours close to each other are parallel to each other, and a first metal line is arranged therebetween; the orthographic projection of the two sides of the adjacent two pixel opening region contours close to each other on the substrate substrate is parallel to the orthographic projection of the first metal line on the substrate substrate, and the spacing between the orthographic projection of the first metal line on the substrate substrate is the same.

[0012] In some examples, the average line width of the first metal line and the spacing between the adjacent two pixel opening region contours satisfy the following relationship: (PDLGAPmax-PDLGAPmin)*0.5X<PDLGAPmax*0.167; wherein X is the average line width of the first metal line, and PDLGAPmax and PDLGAPmin are the maximum and minimum values of the spacing between the adjacent two pixel opening region contours, respectively.

[0013] In some examples, the plurality of sub-pixels further include second sub-pixels and third sub-pixels, the second sub-pixels are configured to emit light of a second primary color, and the third sub-pixels are configured to emit light of a third primary color; the pixel opening region areas of the first sub-pixels, the second sub-pixels, and the third sub-pixels increase in turn; the contour of the pixel opening region of the adjacent two first sub-pixels is a first pixel opening region contour, the contour of the pixel opening region of the second sub-pixels is a second pixel opening region contour, and the contour of the pixel opening region of the third sub-pixels is a third pixel opening region contour; the maximum value of the spacing between the adjacent two pixel opening region contours is the spacing between the adjacent second pixel opening region contour and the third pixel opening region contour in a third direction, and the third direction is neither parallel nor perpendicular to the second direction.

[0014] In some examples, the first metal mesh corresponding to the second pixel opening region profile includes a first side and a second side, the first side is neither parallel nor orthogonal to the second direction, and the second side is neither parallel nor orthogonal to the second direction; the first side is located between the second pixel opening region profile and the first pixel opening region profile, and the second side is located between the second pixel opening region profile and the third pixel opening region profile; the first side is longer than the second side.

[0015] In some examples, the first metal mesh layer includes a plurality of first touch sub-electrodes and a plurality of first connection electrodes arranged along the first direction, the plurality of first touch sub-electrodes and the plurality of first connection electrodes are alternately distributed and sequentially electrically connected, forming a first touch electrode extending along the first direction; the first metal mesh layer further includes a plurality of second touch sub-electrodes sequentially arranged and spaced apart from each other along a second direction, 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 apart from each other and respectively include a plurality of first metal meshes.

[0016] In some examples, the touch structure further includes a second metal mesh layer; the first metal mesh layer and the second metal mesh layer are spaced apart by an insulating layer located between the first metal mesh layer and the second metal mesh layer; the second metal mesh layer includes a plurality of second metal meshes defined by a plurality of second metal lines, a projection of the plurality of second metal lines on the substrate substrate is located outside a projection of the pixel opening regions of the plurality of sub-pixels on the substrate substrate; the second metal mesh layer includes a plurality of second connection electrodes spaced apart from each other, each of the plurality of second connection electrodes is electrically connected to an adjacent second touch sub-electrode through a plurality of vias in the insulating layer, thereby electrically connecting adjacent second touch sub-electrodes to form a second touch electrode extending in the second direction.

[0017] In some examples, the plurality of second metal lines in at least two second metal meshes in each of the plurality of second connection electrodes respectively overlap the plurality of first metal lines of at least two first metal meshes of an adjacent second touch sub-electrode in a direction perpendicular to the substrate substrate, such that the at least two first metal meshes have a plurality of vertices overlapping the at least two second metal meshes, each of the plurality of vias is located at one vertex, and the vertex is referred to as a connection vertex.

[0018] In some examples, of the vertices adjacent to each connection vertex, at most one vertex is a connection vertex.

[0019] In some examples, none of the vertices adjacent to each connection vertex is a connection vertex.

[0020] In some examples, the at least two second metal grids are edge metal grids of the second connection electrodes, and the at least two first metal grids are edge metal grids of the second touch sub-electrodes.

[0021] In some examples, two adjacent second touch sub-electrodes are electrically connected by two second connection electrodes, which are arranged symmetrically with respect to a middle axis extending in the second direction.

[0022] In some examples, a projection of each of the plurality of first connection electrodes on the second metal grid layer is located in a gap between the two second connection electrodes between two adjacent second touch sub-electrodes, and each of the plurality of first touch sub-electrodes is electrically connected to an adjacent first connection electrode by at least one connection line formed by a plurality of first metal lines connected end to end.

[0023] In some examples, the plurality of first metal lines connected end to end respectively overlap a plurality of second metal lines in the second connection electrodes in a direction perpendicular to the substrate.

[0024] In some examples, an average line width of the first metal lines is greater than an average line width of the second metal lines.

[0025] In some examples, a plurality of first metal lines located at a boundary between two adjacent first touch sub-electrodes and second touch sub-electrodes respectively include a plurality of breaks, each of the plurality of breaks divides a first metal line on which the break is located into two first metal line segments, one of the two first metal line segments belongs to the first touch sub-electrode, and the other belongs to the second touch sub-electrode, so as to insulate the two adjacent first touch sub-electrode and second touch sub-electrode.

[0026] In some examples, the plurality of breaks include a plurality of first breaks located on a straight line, the plurality of first breaks are respectively located on a plurality of first metal lines orthogonal to the straight line, there is at least one first metal line between at least two first breaks, the at least one first metal line intersects the straight line, and the at least one first metal line does not have a break at the intersection with the straight line.

[0027] In some examples, the first metal mesh layer includes a plurality of first touch electrodes arranged along the second direction, and at least one first metal mesh includes three first metal mesh portions insulated from each other, the three first metal mesh portions 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 one second touch sub-electrode between the two first touch sub-electrodes, or two second touch sub-electrodes adjacent in the first direction and one first touch sub-electrode between the two second touch sub-electrodes.

[0028] The electronic device includes the touch display panel. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments or related description will be briefly introduced. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, and are not a limitation on the present disclosure.

[0030] FIG. 1A A pixel arrangement schematic diagram of a display structure provided by at least one embodiment of the present disclosure;

[0031] FIG. 1B A schematic diagram of a display structure provided by at least one embodiment of the present disclosure;

[0032] FIG. 1C A FIG. 1B A sectional view along the section line A-A';

[0033] FIG. 1D A schematic diagram of a display structure provided by another embodiment of the present disclosure;

[0034] FIG. 2 A pixel arrangement schematic diagram of a display structure provided by another embodiment of the present disclosure;

[0035] FIG. 3A A schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0036] FIG. 3B A schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

[0037] FIG. 4A A FIG. 4B A schematic diagram of a touch structure provided by at least one embodiment of the present disclosure;

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

[0039] FIG. 5B FIG. 1 is a schematic diagram of a touch structure according to an embodiment of the present disclosure; FIG. 5A FIG. 2 is a cross-sectional view along section line B-B’ of FIG. 1;

[0040] FIG. 5C FIG. 3 is a schematic diagram of a touch structure according to another embodiment of the present disclosure;

[0041] FIG. 5D FIG. 4 is a cross-sectional view along section line D-D’ of FIG. 3; FIG. 5A

[0042] FIG. 5E FIG. 5 is a schematic diagram of a touch structure according to another embodiment of the present disclosure;

[0043] FIG. 6A FIG. 6 is a schematic diagram of a touch structure according to another embodiment of the present disclosure;

[0044] FIG. 6B FIG. 7 is a schematic diagram of a touch structure according to another embodiment of the present disclosure;

[0045] FIG. 7A FIG. 8 is a schematic diagram of a metal wire fracture design according to an embodiment of the present disclosure;

[0046] FIG. 7B FIG. 9 is a simulation diagram of a shadow elimination design of a touch structure according to an embodiment of the present disclosure;

[0047] FIG. 8 FIG. 10 is a schematic diagram of a touch structure according to another embodiment of the present disclosure;

[0048] FIG. 9 FIG. 11 is a schematic diagram of a touch structure according to another embodiment of the present disclosure;

[0049] FIG. 10 FIG. 12 is a schematic diagram of a touch structure according to another embodiment of the present disclosure;

[0050] FIG. 11 FIG. 13 is a schematic diagram of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings, non-restrictive example embodiments shown in the drawings and described in detail below, to explain the example embodiments of the present disclosure and their various features and advantageous details more fully. It should be noted that the features shown in the drawings are not necessarily drawn to scale. The present disclosure omits the description of known materials, components and process techniques, so as not to obscure the example embodiments of the present disclosure. The examples given are only intended to facilitate the understanding of the implementation of the example embodiments of the present disclosure, and to further enable those skilled in the art to implement the example embodiments. Therefore, these examples should not be understood as limiting the scope of the embodiments of the present disclosure.​

[0052] Unless specifically defined otherwise, technical and scientific terms used in the present disclosure shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The term "first", "second", and the like, used in the present disclosure, do not imply any order, quantity, or importance, but are used to distinguish different constituent parts. In addition, the same or similar reference numerals are used to represent the same or similar components throughout the various embodiments of the present disclosure.

[0053] An organic light emitting diode (OLED) display panel has the characteristics of self-illumination, high contrast, low energy consumption, wide viewing angle, fast response speed, flexible panel, wide temperature range, simple manufacturing, etc., and has broad development prospects. In order to meet the diversified needs of users, it is of great significance to integrate various functions such as touch function and fingerprint identification function in the display panel. For example, forming an on-cell touch structure in an OLED display panel is one implementation manner, which forms a touch structure on the encapsulation film of the OLED display panel, thereby realizing the touch function of the display panel.

[0054] For example, a mutual-capacitance touch structure includes a plurality of touch electrodes, which include touch drive electrodes and touch sense electrodes extending in different directions, the touch drive electrodes and the touch sense electrodes form mutual capacitances for touch sensing at intersections with each other. The touch drive electrodes are used to input an excitation signal (touch drive signal), and the touch sense electrodes are used to output a touch sense signal. By inputting an excitation signal to, for example, a longitudinally extending touch drive electrode, a touch sense signal is received from, for example, a laterally extending touch sense electrode, so that a detection signal reflecting the capacitance value of the coupling point (e.g., intersection) of the longitudinal and lateral electrodes can be obtained. When a finger touches the capacitive screen, the coupling between the touch drive electrode and the touch sense 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 sense signal. According to the data of the two-dimensional capacitance change of the touch screen based on the touch sense signal, the coordinates of the touch point can be calculated.

[0055] A touch electrode is formed by a metal mesh pattern, which has good ductility and flexibility, can improve the bending resistance and processability of the touch electrode, and is suitable for flexible electronic applications.

[0056] For example, when the touch electrode formed by the metal mesh is integrated in the display panel, the metal wires in the metal mesh need to be arranged outside the pixel opening area of the display panel to avoid the metal wires from blocking the light, thereby causing the pixel opening rate to decrease. For example, the metal wires in the metal mesh are arranged in the pixel interval area between the pixel opening areas, and the mesh holes in the metal mesh are arranged one by one in correspondence with the pixel opening areas to expose the light emitting elements of each sub-pixel.

[0057] The inventors have found that, for example, the intervals of each sub-pixel in the display panel are not uniform. When the intervals of two sub-pixels are close, the metal wires arranged between the two sub-pixels are close to the pixel opening area of the sub-pixel, thereby easily causing adverse effects on the display function of the two sub-pixels, such as blocking the light emitted by the sub-pixel when viewed obliquely, reflecting the light emitted by the sub-pixel to cause color mixing, and the like. In addition, if the area of the pixel opening area of the sub-pixel is small, the adverse effects will be more obvious.

[0058] At least one embodiment of the present disclosure provides a touch display panel, which comprises a substrate, and a display structure and a touch structure stacked on the substrate. The projection of each mesh hole of at least one first metal mesh on the substrate covers the projections of two pixel opening areas of two adjacent sub-pixels on the substrate. The two adjacent sub-pixels are first sub-pixels configured to emit light of the same first primary 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 primary color.

[0059] It should be noted that the "center" refers to the geometric center of the planar shape of the pixel opening area parallel to the substrate.

[0060] By arranging the pixel opening areas of the two sub-pixels with close intervals to share one mesh hole, that is, removing the metal wires between the two pixel opening areas, the metal wires in the metal mesh are far enough from the pixel opening area, thereby avoiding the adverse effects on the display caused by the metal wires being close to the pixel opening area, and effectively improving the display effect.

[0061] Since the two adjacent sub-pixels emit light of the same color, the pixel opening areas of the two sub-pixels can be close without causing color mixing problems. In addition, for example, when an organic light emitting diode is prepared by 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. For example, the light emitting layers of the two sub-pixels are connected to each other in an integrated structure.

[0062] For example, the areas of the pixel opening areas of the two sub-pixels are equal and smaller than the areas of the pixel opening areas of the sub-pixels emitting light of other primary colors.

[0063] To improve the display resolution, the conventional red, green, blue three-color sub-pixel simple definition of a pixel mode can be changed, a relatively small number of sub-pixels is used to simulate the same pixel resolution performance, thereby reducing the difficulty and cost of manufacturing process. For example, in some pixel arrangement, 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-pixel is configured to emit light of a first primary color, the second sub-pixel is configured to emit light of a second primary color, and the third sub-pixel is configured to emit light of a third primary color. Each pixel unit includes a first sub-pixel; each sub-pixel emitting light different from the first primary color, i.e. each second sub-pixel and each third sub-pixel is 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.

[0064] 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 application is not a strict pixel unit, i.e. 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 referred to as a virtual pixel unit.

[0065] For example, a plurality of pixel units are arranged in an array according to a first direction and a second direction, 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, the sub-pixel density is 1.5 times the pixel unit density in the second direction of the pixel array.

[0066] For example, the difference in resolution of different color sub-pixels of the human eye can be used to share some position resolution insensitive color sub-pixels between different pixels. For example, the first primary color is green, the second primary color is red, and the third primary color is blue.

[0067] 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-shaped light-sensitive cells sensitive to brightness and the cone-shaped light-sensitive cells sensitive to color in the retina of the human eye. Among the three primary colors, the density of the blue-sensitive cone-shaped cells is the lowest, followed by the red color, and the brightness effect of blue and red (stimulation of rod-shaped cells sensitive to brightness) is much lower than that of green, which results in the sensitivity of the human eye to blue and red sub-pixels being significantly lower than that of green sub-pixels. Under a certain pixel resolution, the human eye can distinguish the brightness center position of the pixel and have a normal feeling of color, but it cannot distinguish the position or boundary of the blue or red sub-pixel on the pixel scale, so it is possible to share the adjacent blue and red sub-pixels between adjacent pixels to some extent.

[0068] For example, the sub-pixel of the present disclosure is a pixel structure corresponding to a light-emitting element one by one, and has an independent pixel driving circuit.

[0069] For example, the touch display panel can 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 type of display panel is not limited in the embodiments of the present disclosure.

[0070] The touch display panel provided by the embodiments of the present disclosure is exemplarily described below taking the first primary color as green and the touch display panel as an organic light-emitting diode display panel. However, the embodiments of the present disclosure are not limited thereto.

[0071] FIG. 1A A pixel arrangement schematic diagram provided by an embodiment of the present disclosure is shown. As shown in FIG. 1A The pixel arrangement structure includes a plurality of sub-pixels, and the plurality of sub-pixels are arranged according to a first direction D1 and a second direction D2. The first direction D1 and the second direction D2 are different directions, for example, they are perpendicular to each other. The plurality of first sub-pixels, the plurality of second sub-pixels, and the 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 one green sub-pixel 11, and each red sub-pixel 12 and each blue sub-pixel 13 are shared by two adjacent pixel units 10, so that the boundary of the pixel unit 10 is also very blurred. The shape of the pixel unit 10 is not limited in the embodiments of the present disclosure, FIG. 1A and FIG. 1B The pixel unit 10 is exemplarily shown by a dashed circle in FIGS. 1, 2, and 3. The plurality of pixel units 10 are arranged in an array along the first direction D1 and the second direction D2.

[0072] For example, as shown in FIG. 1A The plurality of green sub-pixels 11 are arranged in pairs, and the distance between the adjacent green sub-pixels is less than the distance between two sub-pixels emitting light of the same color, that is, less than the distance between the red sub-pixel 12 and the blue sub-pixel 13, also less than the distance between the green sub-pixel 11 and the red sub-pixel 12, and less than the distance between the green sub-pixel 11 and the blue sub-pixel 13. For example, a pair of green sub-pixels 11 is arranged along the second direction D2.

[0073] For example, one red sub-pixel 12 and one blue sub-pixel 13 are arranged between two adjacent green sub-pixel pairs in the second direction D2, and the red sub-pixel 12 and the blue sub-pixel 13 are arranged along the first direction D1.

[0074] FIG. 1BThe touch display panel provided by at least one embodiment of the present disclosure is shown. The display structure in the touch display panel adopts FIG. 1A The pixel arrangement structure shown; FIG. 1C for FIG. 1B Sectional view along section line AA'.

[0075] Combined with reference FIG. 1B and FIG. 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.

[0076] For example, if the touch display panel is an OLED display panel, the display structure 30 includes a plurality of sub-pixels, and the plurality of sub-pixels include the green sub-pixel 11, the red sub-pixel 12, and the blue sub-pixel 13 mentioned above. 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, or 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.

[0077] For clarity, FIG. 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 can be a driving transistor configured to operate 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 can also be a light-emission control transistor for controlling 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.

[0078] For example, the light emitting element 23 is an organic light emitting diode, which includes 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, the light emitting element 23 can further include auxiliary functional layers such as a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, and the like, in addition to the light emitting layer 233. For example, the light emitting element 23 is of a top emission structure, and the first electrode 231 has reflectivity while the second electrode 232 has transmissivity or semi-transmissivity. For example, the first electrode 231 is of a material with a high work function to serve as an anode, such as an ITO / Ag / ITO stacked structure; and the second electrode 232 is of a material with a low work function to serve as a cathode, such as a semi-transmissive metal or metal alloy material, such as an Ag / Mg alloy material.

[0079] 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, which is electrically connected to the first electrode 231 of the light emitting element 23. Embodiments of the present disclosure do not limit the type, material, and structure of the first transistor 24, which can be, for example, a top-gate type, a bottom-gate type, or the like, and 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)), or the like, and the first transistor 24 can be N-type or P-type.

[0080] The transistors employed in embodiments of the present disclosure can all be thin film transistors or field effect transistors or other switching devices with the same characteristics, and embodiments of the present disclosure are all described by way of example with thin film transistors. The source and drain of the transistors employed herein can be symmetrical in structure, so that the source and drain can be indistinguishable in structure. In embodiments of the present disclosure, in order to distinguish the two poles of the transistors other than the gate, one of the two poles is directly described as the first electrode, and the other is directly described as the second electrode.

[0081] In combination with FIGS. 1 and 2, FIG. 1B and FIG. 1C As shown in FIG. 2, the display structure 30 further includes a pixel defining layer 32 disposed on the first electrode 231 of the light emitting element 23, in which a plurality of openings 320 are formed to respectively expose the first electrodes 231 of the plurality of sub-pixels, thereby defining a pixel opening region of each sub-pixel, and the light emitting layer of the sub-pixel is formed in the pixel opening region, while the second electrode 232 is formed as a common electrode (i.e., shared by the plurality of sub-pixels). The pixel defining layer 32 includes the pixel opening region 110 of the green sub-pixel 11 (first sub-pixel), the pixel opening region 120 of the red sub-pixel 12 (second sub-pixel), and the pixel opening region 130 of the blue sub-pixel 13 (third sub-pixel).

[0082] The touch structure 40 comprises a first metal mesh layer 50 comprising a plurality of first metal meshes 52 defined by a plurality of first metal lines 51, a projection of the plurality of first metal lines 51 on the substrate 21 is located outside a projection of the pixel opening regions of the plurality of sub-pixels on the substrate 21, i.e. falls within a pixel separation region between the pixel opening regions on the substrate 21, which is a 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, separate the light emitting layers of each sub-pixel, and prevent color mixing.

[0083] As shown in FIG. 1, a projection of the mesh hole 520 of at least one first metal mesh 52 on the substrate 21 covers a projection of two pixel opening regions 110 of two adjacent green sub-pixels 11 (i.e. a pair of green sub-pixels) on the substrate 21, i.e. there is no first metal line 51 arranged between the two pixel opening regions 110. FIG. 1B As shown in FIG. 1, a center distance S1 of the pixel opening regions 110 of the two adjacent green sub-pixels 11 is less than a center distance of two pixel opening regions of two sub-pixels emitting light of the same other primary color. For example, the center distance S1 of the pixel opening regions 110 of the two adjacent green sub-pixels 11 is less than a center distance S2 of the pixel opening regions 120 of two adjacent red sub-pixels 12, or a center distance S3 of the pixel opening regions 130 of two blue sub-pixels 13.

[0084] FIG. 1B For example, the center distance of the pixel opening regions 110 of the two adjacent green sub-pixels 11 is less than a center distance of the pixel opening region 110 of any green sub-pixel 11 and the pixel opening region of an adjacent sub-pixel of another color. As shown in FIG. 1, the center distance of the pixel opening regions 110 of the two adjacent green sub-pixels 11 is less than a center distance S4 of the pixel opening region 110 of the green sub-pixel 11 and the pixel opening region 120 of the adjacent red sub-pixel 12, and less than a center distance S5 of the pixel opening region 110 of the green sub-pixel 11 and the pixel opening region 130 of the adjacent blue sub-pixel 13.

[0085] For example, the center distance of the pixel opening regions 110 of the two adjacent green sub-pixels 11 is less than a center distance of the pixel opening region 110 of any green sub-pixel 11 and the pixel opening region of an adjacent sub-pixel of another color. As shown in FIG. 1, the center distance of the pixel opening regions 110 of the two adjacent green sub-pixels 11 is less than a center distance S4 of the pixel opening region 110 of the green sub-pixel 11 and the pixel opening region 120 of the adjacent red sub-pixel 12, and less than a center distance S5 of the pixel opening region 110 of the green sub-pixel 11 and the pixel opening region 130 of the adjacent blue sub-pixel 13. FIG. 1B For example, as shown in FIG. 1, the center distance of the pixel opening regions 110 of the two adjacent green sub-pixels 11 is less than a center distance S4 of the pixel opening region 110 of the green sub-pixel 11 and the pixel opening region 120 of the adjacent red sub-pixel 12, and less than a center distance S5 of the pixel opening region 110 of the green sub-pixel 11 and the pixel opening region 130 of the adjacent blue sub-pixel 13.

[0086] FIG. 1B ​​As shown, the orthographic projections of the meshes 520 of the other first metal meshes 52 directly connected to the first metal mesh 52 on the substrate 21 each only cover the orthographic projection of the pixel opening area of ​​one sub-pixel on the substrate. This is because the sub-pixels adjacent to the green sub-pixel pair are all sub-pixels of other colors. The pixel opening areas of these sub-pixels of other colors are significantly spaced apart from the pixel opening areas of the adjacent sub-pixels. The one-to-one correspondence between these pixel opening areas and the first metal meshes 52 increases the density of the touch electrodes, thereby improving touch sensitivity.

[0087] For example, when a fine metal mask (FMM) evaporation process is used to prepare an organic light-emitting diode, the light-emitting layers of the two sub-pixels can be formed through one evaporation hole, thereby reducing the difficulty of the preparation process.

[0088] like FIG. 1B As shown, multiple first metal meshes 52 are arranged along a first direction D1 and a second direction D2. For example, each first metal mesh 52 is a polygon, such as a hexagon. Each first metal mesh 51 includes two opposing sides extending along the second direction D2. The lengths of these two sides can be the same or different, and the two sides include the longest side of the first metal mesh 52. That is, the longest side of each first metal mesh is parallel to the second direction D2. For example, the six sides of the first metal mesh 52 include three pairs of opposing sides, each pair of opposing sides being parallel to each other. For another example, except for the pair of sides parallel to the second direction D2, the other two pairs of opposing sides are not parallel to each other.

[0089] like FIG. 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 both hexagonal, and the shape of the pixel opening area of ​​the green sub-pixel 11 is a pentagon.

[0090] FIG. 1B The dotted lines in the figure illustrate the pixel opening area outlines of the pixel opening areas corresponding to each first metal grid 52 (i.e., the pixel opening areas 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 the mesh 520 of the first metal grid 52. The outer contours of the two pixel opening areas 110 are referred to as first pixel opening area outlines 115. The pixel opening area outline of the red sub-pixel is referred to as second pixel opening area outline 125, and the pixel opening area outline of the third sub-pixel is referred to as third pixel opening area outline 135. The first pixel opening area outline 115, the second pixel opening area outline 125, and the third pixel opening area outline 135 are all hexagonal and are adjacent to each other.

[0091] For example, the six sides of each first metal grid are parallel to the six sides of the corresponding pixel opening area outline.

[0092] For example, the two edges of the contours of two adjacent pixel opening areas that are close to each other are parallel to each other, and a first metal line 51 is disposed between them; the orthographic projections of the two edges of the contours of two adjacent pixel opening areas that are close to each other on the substrate 21 are both parallel to the orthographic projections of the first metal line 51 on the substrate 51, and are spaced at the same distance from the orthographic projections of the first metal line 51 on the substrate 21; 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 from the edge of the pixel opening area closest to the first metal line) is the same. This arrangement can prevent the first metal line from being too close to either of the two pixel opening areas, thereby adversely affecting the light in that pixel opening area; in addition, this arrangement ensures that the first metal line has the same effect on the light in the two pixel opening areas, thereby improving display uniformity.

[0093] For the convenience of description, the distance between the orthographic projections of two parallel and adjacent sides of two adjacent pixel opening area contours on the base substrate 21 is referred to as the distance between the two adjacent pixel opening area contours (PDL GAP).

[0094] For example, FIG. 1B As shown, in the first direction D1, the spacing t1 between adjacent second pixel opening area outlines 125 and third pixel opening area outlines 135, the spacing t2 between adjacent second pixel opening area outlines 125 and first pixel opening area outlines 115, and the spacing t3 between adjacent orthographic projections of first pixel opening area outlines 115 and 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.

[0095] For example, FIG. 1BAs shown, in the oblique direction which is neither parallel nor perpendicular to the second direction D2, the pitch k2 between the adjacent second pixel opening region contour 125 and the first pixel opening region contour 115 and the pitch k3 between the adjacent third pixel opening region contour 135 and the first pixel opening region contour 115 are substantially equal, and substantially equal to t1, t2, t3. For example, the pitch k1 between the adjacent second pixel opening region contour 125 and the third pixel opening region contour 135 in the oblique direction which is neither parallel nor perpendicular to the second direction D2 is the maximum value (PDLGAPmax) of the pitches between the pixel opening region contours; that is, the pitch k1 is greater than any of the other pitches (t1, t2, t3, k2, k3) between two adjacent pixel opening region contours. For example, the pitch t2 between the adjacent second pixel opening region contour 125 and the first pixel opening region contour 115 in the first direction D1 is the minimum value (PDLGAPmin) of the pitches between the pixel opening region contours; that is, the pitch t2 is smaller than any of the other pitches (t1, t3, k1, k2, k3) between two adjacent pixel opening region contours.

[0096] 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 pitch between two adjacent pixel opening region contours: (PDLGAPmax-PDLGAPmin)*0.5X

[0097] If the line width of the first metal line 51 or the second metal line 61 is too large (for example, relative to the pitch (PDLGAP) between the pixel opening region contours), it is easy to be too close to the pixel opening region and thus to block or reflect the light emitted by the pixel opening region, and it is also easy to be recognized by the human eye and thus to affect the display effect of the display panel; if the line width is too small, it is easy to cause disconnection and also to increase the resistance of the touch electrode. By satisfying the above relationship, the line width of the first metal line 51 or the second metal line 61 can be appropriately adjusted, thereby alleviating the above problems.

[0098] 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 of the first metal line 51 and the second metal line 61 can be minimized, thereby reducing the capacitive load on the touch electrode and improving the touch sensitivity. In addition, since the first touch sub-electrode and the second touch sub-electrode are both formed by the first metal line 51, setting the line width of the first metal line 51 to be larger can help to reduce the resistance of the touch sub-electrode, thereby further improving the touch sensitivity.

[0099] 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.

[0100] For example, referring to FIG. 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.

[0101] For example, as shown in FIG. 1B , 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 (e.g., the distance between two opposite vertices of the first metal grid in the second direction D2) y1 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 (e.g., the distance between two opposite vertices of the first metal grid in the second direction D2) y1 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 (e.g., the distance between two opposite vertices of the first metal grid in the second direction D2) y1 is 66.1 microns.

[0102] FIG. 1D The adjacent first pixel opening area outline 115, second pixel opening area outline 125, and third pixel opening area outline 135 and the first metal line 51 therebetween are shown. The adjacent first pixel opening area outline 115, second pixel opening area outline 125, and 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.

[0103] As shown in FIG. 1D , for example, the distance k1 between the adjacent second pixel opening area outline 125 and third pixel opening area outline 135, the distance k2 between the adjacent second pixel opening area outline 125 and first pixel opening area outline 115, and the distance t3 between the adjacent third pixel opening area outline 135 and first pixel opening area outline 115 in the orthographic projection of the substrate 21 are all different. Since the first metal line between adjacent pixel opening area outlines is located in the middle of the gap between the two pixel opening area outlines, this can cause the three first metal lines 51 between the three pixel opening area outlines 115, 125, and 135 to not intersect at a point, as shown in FIG. 1DAs shown, the three first metal lines 51 intersect with each other to define a triangle.

[0104] For example, FIG. 1D As shown, the first metal grid corresponding to the second pixel opening area outline 125 includes adjacent first and second sides x1 and x2, wherein the first side x1 is neither parallel nor orthogonal to the second direction D2, and the second side x1 is neither parallel 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 FIG. 1B As shown, for example, the areas of the pixel opening region 110 of the green sub-pixel 11, the pixel opening region 120 of the red sub-pixel 12, and the pixel opening region 130 of the blue sub-pixel 13 increase in sequence. For example, the area of ​​the pixel opening region 110 of the green sub-pixel 11 is the smallest. This is because the lifespan of the luminescent material of the green sub-pixel 11 is longer than that of the luminescent materials of the other color sub-pixels. Therefore, minimizing the area of ​​its pixel opening region 110 can improve the uniformity and stability of the light emission of the display panel.

[0105] For example, FIG. 1B As shown, the first metal mesh 52 covering the pixel opening area of ​​the two green sub-pixels is hexagonal, and the other first metal meshes 52 directly connected to the first metal mesh 52 are also hexagonal. However, this embodiment of the present disclosure is not limited to this. The first metal mesh can also be a quadrilateral, pentagon, or other shape.

[0106] like FIG. 1C As shown, the display structure 30 further includes a first encapsulation layer 33 located between the light-emitting element 23 and the touch-sensing structure 40. 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 damaging components such as the light-emitting element 23. For example, the encapsulation layer 33 can 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 comprising alternating layers of organic and inorganic thin films.

[0107] like FIG. 1CAs shown, the touch display panel 20 further comprises a buffer layer 22 between the display structure 30 and the touch structure 40. For example, the buffer layer 22 is formed on the first encapsulation layer 33, for improving the adhesion between the touch structure 40 and the display structure 30. For example, the buffer layer 22 is an inorganic insulating layer, and the material of the buffer layer 22 can be silicon nitride, silicon oxide or silicon oxynitride. For example, the buffer layer 22 can also comprise a structure of silicon oxide layer and silicon nitride layer stacked alternately.

[0108] For example, the touch display panel 20 can further comprise a cover plate 34 above the touch structure 40, which is for example a glass cover plate or an organic flexible cover plate.

[0109] In some other examples, a transparent protective layer such as transparent optical adhesive can also be used to replace the cover plate 34 to protect the touch structure 40.

[0110] For example, the substrate 21 can be a glass substrate, a silicon substrate or a flexible substrate, which can be formed by a plastic material with excellent heat resistance and durability, such as polyimide (PI), polycarbonate (PC), polyethylene terephthalate glycol (PET), polycarbonate, polyethylene, polyacrylate, polycarbonate, polyarylate, polyetherimide, polyethersulfone, polyethylene terephthalate glycol (PET), polyethylene (PE), polypropylene (PP), polysulfone (PSF), polymethyl methacrylate (PMMA), cellulose triacetate (TAC), cyclic olefin polymer (COP) and cyclic olefin copolymer (COC) and the like.

[0111] FIG. 2 Another pixel arrangement is shown in the schematic view of FIG. 6, which is different from the pixel arrangement shown in FIG. 5 in that two blue sub-pixels 13 or two red sub-pixels 12 are arranged between two green sub-pixel pairs adjacent in the first direction. FIG. 1A The pixel arrangement shown in FIG. 6 is different from the pixel arrangement shown in FIG. 5 in that two blue sub-pixels 13 or two red sub-pixels 12 are arranged between two green sub-pixel pairs adjacent in the first direction. FIG. 2 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.

[0112] Similarly, the pixel opening regions of the two green sub-pixels in the green sub-pixel pair can be exposed to the same first metal mesh 52, which will not be described herein again.

[0113] For example, when the organic light-emitting diode is prepared by a fine metal mask (FMM) evaporation process, the light-emitting layer of the two adjacent red sub-pixels or blue sub-pixels can be formed through one evaporation hole, thereby reducing the difficulty of the preparation process.

[0114] In some other examples, since the human eye is least sensitive to the position of the blue sub-pixel 13, and the luminance effect of the blue sub-pixel is also the lowest, the two blue sub-pixels 13 adjacently arranged can be combined into one sub-pixel, i.e., they share the same light emitting element and the same pixel driving circuit, thereby reducing the process difficulty and saving the process cost. For example, the pixel opening areas of the two blue sub-pixels are also combined into one.

[0115] For example, the first metal mesh layer 50 includes a plurality of first touch sub-electrodes arranged along the first direction D1 and a plurality of first connection electrodes, the plurality of first touch sub-electrodes and the plurality of first connection electrodes are alternately distributed and electrically connected in sequence, forming a first touch electrode extending along the first direction; the first metal mesh layer 50 further includes a plurality of second touch sub-electrodes arranged along the second direction D2 and spaced from each other; 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 meshes 52 connected to each other.

[0116] For example, the touch structure further includes a second metal mesh layer, which is located in a layer different from the first metal mesh layer with respect to the substrate 21, and the two are separated by an insulating layer 70 (as shown in FIG. 1C For example, the second metal mesh layer is closer to the substrate.

[0117] Reference FIG. 1C Since the second electrode 232 is a common electrode for loading a constant power voltage, the second touch electrode 420 in the first metal mesh layer 50 needs to transmit the change amount of the touch sensing signal caused by touch, so as to realize the touch detection function, therefore, the first metal mesh layer is arranged to be farther away from the substrate, i.e., farther away from the second electrode 232, so as to avoid the influence of the constant signal in the second electrode 232 on the changing signal in the second touch electrode 420, and affect the accuracy of touch detection.

[0118] The second metal mesh layer includes a plurality of second metal meshes defined by a plurality of second metal lines, the orthogonal projection of the plurality of second metal lines on the substrate is located outside the orthogonal projection of the pixel opening area of the plurality of sub-pixels on the substrate, i.e., located within the orthogonal projection of the pixel spacing area on the substrate. The second metal mesh layer includes a plurality of second connection electrodes (i.e., bridge electrodes) spaced from each other, each of the plurality of second connection electrodes electrically connects adjacent second touch sub-electrodes to form a second touch electrode extending in the second direction. The second connection electrode includes a plurality of second metal meshes connected to each other.

[0119] FIG. 3A A schematic diagram of the touch structure 40 provided by at least one embodiment of the present disclosure is shown. As FIG. 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, embodiments of the present disclosure are not limited thereto. In other examples, the first touch electrodes 410 can be touch driving electrodes and the second touch electrodes 420 are touch sensing electrodes.

[0120] 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, each first touch sub-electrode 411 and each second touch sub-electrode 421 has a main body outline in the shape of a rhombus. In other examples, the first touch sub-electrodes 411 and the second touch sub-electrodes 421 can also be in other shapes, such as triangular, strip-shaped, etc. FIG. 3A

[0121] The first touch sub-electrodes 411 adjacent in the first direction D1 are electrically connected by a first connecting electrode (not shown) to form the first touch electrode 410, and the second touch sub-electrodes 421 adjacent in the second direction D2 are electrically connected by a second connecting electrode (not shown) to form the second touch electrode 420.

[0122] Each first touch electrode 410 and each second touch electrode 420 cross each other in an insulated manner and form a plurality of touch units 400 at the crossing, each touch unit including a portion of each of two first touch electrode portions connected at the crossing and at least a portion of each of two second touch electrode portions connected at the crossing. FIG. 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 including one first touch sub-electrode 411 and an area of ​​the second touch sub-electrode 421 on average. The intersection 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, it affects the coupling between the first touch electrode and the second touch electrode near the touch point, 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, and 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, while if it is too small, a false touch signal may be generated.

[0123] 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, approximately 4 mm; this is because the diameter of a human finger in contact with the touch panel is approximately 4 mm. For example, the pitch P 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, as well as the center-to-center distance between adjacent first touch sub-electrodes 411 and the center-to-center distance between adjacent second touch sub-electrodes 421.

[0124] For example, the first metal grid layer 50 further includes dummy electrodes. FIG. 3A As shown, the first touch sub-electrode 411 and the second touch sub-electrode 421 each include a hollow area, in which a dummy electrode 430 spaced apart 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.

[0125] For example, the touch area is usually rectangular (refer to FIG. 10 ), one of the touch drive electrode and the touch sensing electrode extends along the length of the rectangle, and the other extends along the width of the rectangle. The touch electrode extending along the length is longer and therefore has a greater load. To improve the touch sensitivity of the touch electrode structure, it is necessary to reduce the load on the touch electrode.

[0126] 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, FIG. 3A As shown in FIG, 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 in the hollow area that is provided on the same layer as the touch electrode, the uniformity of the film layer can be improved, thereby improving the product yield. In some embodiments, the hollow area and dummy electrode can be provided only in the longer second touch electrode, while the first touch electrode is not provided with such a design (as shown in FIG. FIG. 3B shown).

[0127] For example, each dummy electrode 430 has the same outline as the hollowed-out region in which it is located, that is, the dummy electrode and the touch sub-electrode in which it is located are nested with each other; a boundary region exists between the dummy electrode and the touch sub-electrode, and the dummy electrode and the touch sub-electrode are insulated from each other by the boundary region. 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 by a break formed by a broken first metal wire, that is, the first metal wire located in the boundary region 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.

[0128] The average size of the boundary region (the average spacing between the dummy electrodes and the touch electrodes) is the minimum size that meets the design rule, for example, 3 to 6 microns. This can improve the uniformity of the film layer where the electrodes are located and increase 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.

[0129] For example, FIG. 3A As shown, the boundary area extends along a curve, that is, the outline of the dummy electrode is a curved structure. For example, the outline 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 the dummy electrodes being too concentrated and causing blind spots. 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 a straight line structure, thereby increasing the mutual capacitance of the touch electrode.

[0130] FIG. 3B Schematic diagrams of touch structures provided by other embodiments of the present disclosure are shown. FIG. 3BAs shown, the first touch sub-electrode 411 and the second touch sub-electrode 421 each include a main body and a plurality of interdigital structures 440 extending from the main body, the first touch sub-electrode 411 and the adjacent second touch sub-electrode 421 are nested with each other in the first metal mesh 50 through the interdigital structures 440 to form mutual capacitance. The interdigital structures can increase the perimeter of the touch sub-electrode under the same area, thus effectively increasing the mutual capacitance without increasing the self-capacitance (capacitance 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 (e.g., rectangle), triangle, trapezoid, hexagon.

[0131] For example, the plurality of interdigital structures 440 are distributed on the periphery of the main body of the touch sub-electrode. For example, the main body is rectangular, and the number of the second interdigital structures 112 corresponding to each side is 3-10, for example, 6-10. In other examples, the main body can also be circular, and the plurality of interdigital structures 440 are uniformly distributed on the circumference of the circle.

[0132] FIG. 3B An enlarged schematic view of one touch unit 400 is shown on the right side. As shown, the adjacent first touch sub-electrodes 411 in the first direction D1 are connected by the first connecting electrodes 412 to form the first touch electrode 410 extending in the first direction D1, and the adjacent second touch sub-electrodes 421 in the second direction D2 are connected by the second connecting electrodes (not shown) to form the second touch electrode 420 extending in the second direction D2. FIG. 3B FIG. 3B

[0133] For example, the length of each interdigital structure 440 is 1 / 10-1 / 3 of the center distance of the adjacent first touch sub-electrode 411, i.e., the distance between the center points of the adjacent first touch sub-electrodes 411. For example, the center distance is the pitch P of the touch structure. For irregular interdigital structures, for example, the length can be the average length, the maximum length, or the minimum length of the interdigital structure 440.

[0134] For example, the width of each interdigital structure 440 is 1 / 10-1 / 4 of the center distance of the adjacent first touch sub-electrode 411, for example, 1 / 10-1 / 4 of the pitch P of the touch structure. For irregular interdigital structures, for example, the width can be the average width, the maximum width, or the minimum width of the interdigital structure 440.

[0135] For example, the spacing d between adjacent interdigital structures 440 is 1 / 20-1 / 10 of the pitch P of the touch structure. For the case where the spacing between adjacent interdigital structures is not uniform, for example, the spacing d can be the average spacing, the maximum spacing, or the minimum spacing of the interdigital structure 440. ​​

[0136] FIG. 4A An enlarged schematic view of one touch sub-electrode in the touch structure is shown, which can be the first touch sub-electrode 411 or the second touch sub-electrode 421. The following takes the first touch sub-electrode 411 as an example for illustration.

[0137] As shown in FIG. 4A , the first touch sub-electrode 411 includes a main body 413 and a plurality of interdigital structures 440 connected to the main body 413, which are distributed around the periphery of the main body 413. The main body 413 includes a plurality of edges, for example, a rectangle; for example, the number of interdigital structures 440 corresponding to each edge is 3-10, for example, 6-10.

[0138] For example, as shown in FIG. 4A , the dummy electrode 430 in the first touch sub-electrode 411 includes an interdigital structure 460. At least one interdigital structure 460 and the extension direction of at least one interdigital structure 440 of the first touch sub-electrode 411 are parallel to each other.

[0139] For example, the interdigital structure 440 or the interdigital structure 460 can be regular or irregular in shape, for example, can include at least one of the following: rectangle, triangle, trapezoid. As shown in FIG. 4A , each interdigital structure 460 is a combination of two rectangles, i.e., a convex shape; this further increases the edge length of the first touch electrode 411 compared to a single rectangle shape.

[0140] FIG. 4B An enlarged schematic view of one touch sub-electrode in the touch structure is shown, which can be the first touch sub-electrode 411 or the second touch sub-electrode 421. The following takes the first touch sub-electrode 411 as an example for illustration. FIG. 4B As shown in FIG. 4B , along the first direction D1, adjacent first touch sub-electrodes 411 are electrically connected to each other by the first connecting electrode 412 to form the first touch electrode 410 located in the first metal mesh layer 50; along the second direction D2, adjacent second touch sub-electrodes 421 are electrically connected to each other by the second connecting electrode 422 located in the second metal mesh layer 60 to form the second touch electrode 420. The first touch sub-electrode 411 and the second touch sub-electrode 421 are nested and isolated from each other in the first metal mesh layer 50 by the interdigital structure 440. As shown in , the boundary line of the first touch sub-electrode 411 and the second touch sub-electrode 421 is zigzag-shaped due to the presence of the interdigital structure.

[0141] FIG. 5A An enlarged schematic view of FIG. 3B and FIG. 4B A region, which is the intersection of the first touch sub-electrode 411 and the second touch sub-electrode 421, i.e., a bridging region; FIG. 5B is shown.FIG. 5A a cross-sectional view along the section line B-B’, FIG. 5D is FIG. 5A a cross-sectional view along the section line D-D’, FIG. 5B and FIG. 5D the specific details of the display structure are omitted in

[0142] FIG. 5A In the light color mesh, the first metal mesh in the first metal mesh layer 50 is schematically shown, the first metal mesh 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 each include a plurality of first metal meshes 52 connected to each other; FIG. 5A In the dark color mesh, the second metal mesh in the second metal mesh layer 60 is schematically shown, the second metal mesh layer 60 includes the second connecting electrode 422, the second connecting electrode 422 includes a plurality of second metal meshes 62 connected to each other.

[0143] For example, two ends of the second connecting electrode 422 are respectively electrically connected to two adjacent second touch sub-electrodes 421 in the second direction D2 through the via 71 in the insulating layer 70, thereby electrically connecting the two adjacent second touch sub-electrodes 421 in the second direction D2. FIG. 5A In the figure, the connection region C of both is shown.

[0144] For example, as FIG. 5A shown, the two adjacent second touch sub-electrodes 421 in the second direction D2 are electrically connected through the two second connecting electrodes 422. The arrangement of such a double-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. In the detection process, when it is detected that one channel of the two second connecting electrodes 422 has a short circuit failure, even if the channel is cut off (for example, by laser cutting), the circuit structure can still work normally through the other channel.

[0145] For example, the plurality of first metal lines 51 in at least two first metal meshes 52 in the second touch sub-electrode 421 respectively overlap with the plurality of second metal lines 61 in at least two second metal meshes 62 in each of the plurality of second connecting electrodes 422 in the orthographic projection of the second metal mesh layer 60, so that the at least two first metal meshes 52 have a plurality of vertices overlapping with the at least two second metal meshes 62, the plurality of vertices include a plurality of connection vertices, and a plurality of vias 71 are respectively located at the plurality of connection vertices, that is, the plurality of vias 71 are arranged one-to-one with the plurality of connection vertices, and the vertex of the first metal mesh 52 where the via is arranged is called a connection vertex.

[0146] 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.

[0147] It should also be noted that the vertices adjacent to each connected vertex are vertices that are directly adjacent to the connected vertex through a metal line. As shown in 5A, when the first metal grid and the second metal grid are hexagonal, the number of vertices adjacent to each connected vertex is at most three.

[0148] For example, the at least two second metal grids 62 are edge metal grids located at the ends of the second connection electrode 422; the at least two first metal grids 52 are edge metal grids located at the ends of the second touch electrode 421. The first metal grids 52 and the second metal grids 62 are both polygonal.

[0149] like FIG. 5A As shown, the second connecting electrode 422 is electrically connected to the second touch sub-electrode 421 through the second metal line 61a in the edge second metal grid 62a located at each end and the first metal line 51a in the adjacent edge first metal grid 52a.

[0150] For example, the second metal line 61a is located on the side of the edge second metal grid 62a closest to the second touch sub-electrode 421. For example, the first metal line 51a is located on the side of the edge first metal grid 52a closest to the second connecting electrode 422. This arrangement can minimize the overlap between the second touch sub-electrode 421 and the second connecting electrode 422, thereby reducing the capacitive load on the touch sub-electrode and improving touch sensitivity.

[0151] For example, combined with FIG. 5A and FIG. 5B As shown, the second connection electrode 422 is located at each end of the polygonal edge of the second metal grid 62a, and at least two second metal lines 61a of the adjacent polygonal edge of the second touch sub-electrode 421 overlap in a direction perpendicular to the substrate, and are electrically connected through the via 71 in the insulating layer, so that the second connection electrode 422 is electrically connected to the second touch sub-electrode 421. For example, FIG. 5A and 5BAs shown, the at least two first metal wires 51a and the at least two second metal wires 61a overlap with each other in a direction perpendicular to the substrate 21, so that the edge first metal mesh 52a has a plurality of vertices 53 overlapping with the edge second metal mesh 62a, the plurality of vertices 53 including a plurality of connection vertices 53a, and the via 71 is located at one 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 mesh 52a and the plurality of vertices 63 of the edge second metal mesh 62a overlap with each other in a direction perpendicular to the substrate 21, and each via 71 corresponds to a pair of overlapping vertices 53 / vertices 63.

[0152] It should be noted that, in FIG. 5A , the first metal mesh layer 50 is closer to the viewer, so the second metal wires 61a in the edge second metal mesh 62a overlapping with the edge first metal mesh 52a are blocked by the first metal wires 51a in the edge first metal mesh 52a, however, for the convenience of description, FIG. 5A , the second metal wires 61a and the metal contact pad 65 are specially shown.

[0153] For example, in the first metal mesh, at most one of the vertices 53 adjacent to each connection vertex 53a (the two adjacent vertices are located at both ends of one first metal wire 51) is the connection vertex 53a, that is, in the first metal mesh layer, there is no three consecutive vertices that are connection vertices.

[0154] It should be noted that the vertices adjacent to each connection vertex refer to the vertices adjacent to the connection vertex directly through one metal wire. As shown in 5A, in the case of hexagonal first metal mesh and second metal mesh, the number of vertices adjacent to each connection vertex is at most three.

[0155] For example, as shown in FIG. 5A and 5B For each second connection electrode 422, four first metal wires 51a in the edge first metal mesh 52a of the three polygons and four second metal wires 61a in the edge second metal mesh 62a of the two polygons overlap with each other in a direction perpendicular to the substrate 21, so that the edge first metal mesh 52a has five vertices 53 overlapping with the edge second metal mesh 62a, and the four first metal wires 51a sequentially connect (for example, in the first direction) the five vertices 53 into a W shape; the five vertices 53 are sequentially numbered as the first vertex, the second vertex, the third vertex, the fourth vertex, and the fifth vertex. For example, the first vertex, the second vertex, the fourth vertex, and the fifth vertex are provided with vias 71 and are connection vertices 53a, FIG. 5AThe connection vertex 53a is indicated by a dot. The four connection vertices 53a 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 connection vertices 53a are not located on a straight line. As shown in FIG. 5A the connection vertices 53a are located on two straight lines.

[0156] For example, the effective channel can be understood as the first metal line 51 directly connected to the connection vertex 53a and necessary for 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 line 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 of the connection vertices 53a, without passing through the first metal line 51.

[0157] Through the above arrangement, each connection vertex 53a can generate an effective channel, thereby minimizing the overlap of the first metal line 51a and the second metal line 52a.

[0158] For example, FIG. 5C The left side shows an example of a vertex 63 of the second metal mesh 62 not provided with a via hole, and the right side shows an example of a vertex 63a (corresponding to the connection vertex 53a) of the second metal mesh 62 provided with a via hole 71. As shown in FIG. 5C In order to make the first metal line 51 form good contact with the second metal line 61 at the connection vertex 53a through the via hole 71, the second metal mesh layer 60 forms a metal contact pad 65 with a larger area at the vertex 63a, resulting in an area of the vertex 63a larger than that of the original vertex 63. Similarly, the first metal mesh layer 50 also forms a metal contact pad at the connection vertex 53a. For example, 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 the size of the first metal line 51 or the second metal line 61. Therefore, the arrangement of the via hole 71 causes the overlap area of the first metal line 51 and the second metal line 52 to increase.

[0159] Through the above arrangement, each connection vertex 53a can generate an effective channel, thereby minimizing the overlap of the first metal line 51a and the second metal line 52a.

[0160] In some examples, for example, each of the adjacent vertices 53 to each connection vertex 53a in the edge first metal mesh 52a is not a connection vertex. For example, for each second connection electrode 422, the number of the vertices 53 in the edge first metal mesh 52a which are not connection vertices is not less than 5. FIG. 5A For each second connection electrode 422 shown, the above-mentioned No. 1 vertex, No. 3 vertex and No. 5 vertex can be set as connection vertices, and the three connection vertices form three effective channels. For example, the plurality of connection vertices are located on a straight line.

[0161] For example, for each second connection electrode 422, the number of the vertices of the edge second metal mesh 62a which overlap with the edge first metal mesh 52a is not less than 5, and the number of the connection vertices is not less than 3.

[0162] For example, the first metal wire 51 directly connected to each connection vertex 53a is complete, that is, the first metal wire 51 is connected between two vertices of the first metal mesh 52 without any breakage in between. For example, the first metal mesh 52 in which each connection vertex 53a is located is complete, that is, all the first metal wires 51 in the first metal mesh 52 are complete. Such a configuration can improve the transmission efficiency and effectiveness of the touch signal input from the second touch sub-electrode 421 to the second connection electrode 422.

[0163] For example, each second connection electrode 422 includes at least two connection lines (first connection lines), FIG. 5A For example, one connection line 64 is shown in the figure. The connection line 64 is composed of a plurality of second metal wires 61 which are sequentially connected at the head and tail, and the two ends of the connection line 64 correspond to a vertex 63a of a second metal mesh 62 respectively, and are electrically connected to a connection vertex 53a of a first metal mesh 52 through a via 71, thereby effectively transmitting the signal between two adjacent second touch sub-electrodes 421. For example, the plurality of connection lines 64 do not share (overlap) any second metal wire 61.

[0164] For example, as shown in the figure, FIG. 5AAs shown, each second connecting 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 connecting electrode 422, and connect the edge second metal grids 62a at both ends of the second connecting electrode 422. The plurality of intermediate second metal grids 62b are connected in sequence, and each intermediate second metal grid 62a only includes 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 51 is located at the edge of the second connecting 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 FIG. 5A As shown, each second connecting electrode 422 includes two connecting lines 64 .

[0165] For example, FIG. 5A As shown, the positive projection of each first connecting electrode 412 in 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. FIG. 5A The dotted line in FIG. 4 shows the range of the first connection electrode 412. FIG. 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 further 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.

[0166] For example, FIG. 5A As shown, the second metal meshes 62 in the second connection electrodes 422 are all complete meshes, and no second metal lines 61 in the second metal meshes 62 have any breaks. This is because the number of metal meshes in the second connection electrodes 422 is relatively small, which can improve the yield of the second connection electrodes 422 and ensure effective signal transmission.

[0167] For example, FIG. 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, for example, at least one edge is missing, so that the second metal wires 61 do not overlap with the first metal wires 51.

[0168] For example, as shown in FIG. 4A, each first touch sub-electrode 411 is electrically connected to the adjacent first connection electrode 412 through at least one connection line 51b (second connection line) composed of a plurality of first metal lines 51 connected in sequence from head to tail. FIG. 5A For example, as shown in FIG. 4A, each first touch sub-electrode 411 is electrically connected to the adjacent first connection electrode 412 through at least one connection line 51b (second connection line) composed of a plurality of first metal lines 51 connected in sequence from head to tail. FIG. 5E The connection line 51b shown in FIG. 4B includes three first metal lines 51. For example, each first metal line 51 in the connection line 51b overlaps the second metal line 61 in the second connection electrode 422 in a direction perpendicular to the substrate, thereby not affecting the pixel aperture ratio.

[0169] FIG. 3B Another example of the enlarged schematic view of the A area in FIG. 4B is shown. FIG. 4B and FIG. 5E Another example of the enlarged schematic view of the A area in FIG. 4B is shown. FIG. 5E The first touch electrode 410 including the first touch sub-electrode 411 and the first connection electrode 412 and the second touch sub-electrode 421 in the second touch electrode 420 each include a plurality of first metal meshes 52 connected to each other, as shown by the light-colored mesh in FIG. 4B. That is, the light-colored mesh is the first metal mesh 52 in the first metal mesh layer 50. FIG. 5A The second connection electrode 422 in the second touch electrode 420 includes a plurality of second metal meshes 62 connected to each other, as shown by the dark-colored mesh in FIG. 4B. That is, the dark-colored mesh is the second metal mesh 62 in the second metal mesh layer 60. The range of the first connection electrode 412 is circled by a dashed line in the figure.

[0170] Unlike the embodiment shown in FIG. 4B, the embodiment shown in FIG. 4C has a larger number of intermediate second metal meshes 62b included in the second connection electrode 422, and a larger number of connection lines 51b (three are shown in the figure) electrically connecting each first touch sub-electrode 411 to the adjacent first connection electrode 412. FIG. 5E As shown in FIG. 4C, the plurality of connection lines 51b are spaced apart from each other, and the first metal lines 51 in the two adjacent connection lines 51b are not directly connected by a first metal line 51. FIG. 5E As shown in FIG. 4C, the plurality of connection lines 51b are spaced apart from each other, and the first metal lines 51 in the two adjacent connection lines 51b are not directly connected by a first metal line 51. FIG. 5E It should be noted that, in FIG. 4C, the first metal mesh layer 50 is closer to the viewer, and therefore the second metal line 61a in the edge second metal mesh 62a that overlaps the edge first metal mesh 52a is blocked by the first metal line 51a in the edge first metal mesh 52a. However, for ease of illustration,

[0171] FIG. 5E It should be noted that, in FIG. 4C, the first metal mesh layer 50 is closer to the viewer, and therefore the second metal line 61a in the edge second metal mesh 62a that overlaps the edge first metal mesh 52a is blocked by the first metal line 51a in the edge first metal mesh 52a. However, for ease of illustration, FIG. 5A ​The second metal line 61 a and the metal contact pad 65 are specifically shown in FIG.

[0172] For example, FIG. 5E 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 fractures (notches) formed at the ends away from the first connection electrode 412. FIG. 5A As shown, the first connection electrode 412 also includes an edge first metal wire with a middle break, which separates a first metal wire 51 into two first metal wire segments. 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. FIG. 6A and 5D As 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 .

[0173] This arrangement minimizes the overlap of the metal lines in the first touch sub-electrode 411 and the second connecting electrode 422, thereby reducing the mutual capacitance between them. When the mutual capacitance between the first touch electrode 410 and the second touch electrode 420 changes due to a touch signal, the change is easier to detect due to the smaller baseline mutual capacitance value, thereby improving the sensitivity of touch detection.

[0174] FIG. 6B and FIG. 3B Shown respectively FIG. 5D Two examples of the enlarged schematic diagram of area B, which 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. Area B is the isolation area of ​​the four touch sub-electrodes.

[0175] For example, FIG. 6A 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.

[0176] FIG. 6AThe shown metal grids are all located in the first metal grid layer, i.e., are all first metal grids, wherein the light-colored grid represents the first metal grid in the adjacent first touch sub-electrode 411, and the dark-colored grid represents the first metal grid in the adjacent two second touch sub-electrodes 421.

[0177] As shown in FIG. 1, the first touch sub-electrodes 411 and the second touch sub-electrodes 421 are adjacent to each other, and a plurality of first metal lines 51 located in the boundary area between the two are each composed of a plurality of spaces 510, each of which is located in the middle of the first metal line 51 in which it is located and separates the first metal line 51 in which it is located into two first metal line segments 51f, one of which belongs to the first touch sub-electrode 411 and the other of which belongs to the second touch sub-electrode 421, thereby insulating the adjacent first touch sub-electrode 411 and the second touch sub-electrode 421. FIG. 6A

[0178] It should be noted that the first metal line segment belonging to a touch sub-electrode in the embodiments of the present disclosure means that there is an electrical connection relationship between the first metal line segment and the touch sub-electrode.

[0179] In the touch structure provided in at least one embodiment of the present disclosure, the adjacent and insulated touch sub-electrodes (for example, between the adjacent first touch sub-electrode and the second touch sub-electrode, between the two second touch sub-electrodes adjacent in the first direction, and between the two first touch sub-electrodes adjacent in the second direction) are insulated by the spaces formed by the broken lines of the metal lines; compared with the insulation by the dummy electrodes, this kind of setting can maximize the setting area of the touch electrodes and improve the density of the touch electrodes, thereby improving the touch sensitivity.

[0180] For example, as shown in FIG. 1, the edge metal grid of each touch sub-electrode is incomplete, i.e., includes a part of the first metal grid, and the edge metal grids of the adjacent touch sub-electrodes match each other to define the first metal grid. FIG. 6A

[0181] For example, at least one first metal grid includes three first metal grid portions insulated from each other, and the three first metal grid portions respectively belong to a first touch sub-electrode and two second touch sub-electrodes 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 first metal grid portions insulated from each other.

[0182] As shown in FIG. 1, the edge metal grid of each touch sub-electrode is incomplete, i.e., includes a part of the first metal grid, and the edge metal grids of the adjacent touch sub-electrodes match each other to define the first metal grid. FIG. 6B and FIG. 6A As shown in FIG. 1, the edge metal grid of each touch sub-electrode is incomplete, i.e., includes a part of the first metal grid, and the edge metal grids of the adjacent touch sub-electrodes match each other to define the first metal grid. FIG. 6B and FIG. 6A ​​In some embodiments, each of the two first metal grids 52c in the dashed circle comprises three first metal grid portions insulated from each other, which belong to three touch sub-electrodes insulated from each other respectively, the three touch sub-electrodes comprising two first touch sub-electrodes 411 adjacent in the second direction D2 and one second touch sub-electrode 421 between the two first touch sub-electrodes (as shown in FIG. 6B FIG. 6A), or the three touch sub-electrodes comprising two second touch sub-electrodes 421 adjacent in the first direction D1 and one first touch sub-electrode 411 between the two second touch sub-electrodes (as shown in FIG. 6A FIG. 6B). Such design makes the arrangement more compact while effectively insulating the touch sub-electrodes, thereby improving the touch sensitivity.

[0183] For example, as shown in FIG. 6A and 6B , there is a break 510 on each of the three edges of each metal grid 52c, thereby dividing the metal grid into three portions.

[0184] For example, as shown in FIG. 6A and 6B , the first metal grid 52c is a polygon, for example, a hexagon, which comprises two edges parallel to the second direction D2 and opposite to each other, and the first metal line 51 on at least one of the edges of the first metal grid 52c has a break, thereby dividing the first metal line into two first metal line segments 51f. For example, as shown in FIG. 6B , the two first metal line segments 51f belong to two first touch sub-electrodes 411 adjacent in the second direction D2 respectively. For example, as shown in FIG. 6A , the two first metal line segments 51f belong to a first touch sub-electrode 411 and a second touch sub-electrode 421 adjacent respectively.

[0185] For example, as shown in FIG. 6A and 6B , the polygons of the two first metal grids 52c share an edge, that is, the two first metal grids 52c share a first metal line 51g, and the first metal line 51g has a break 520, which separates the first metal line 51g into two first metal line segments spaced apart.

[0186] For example, as shown in FIG. 6BAs 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. Two first metal line segments in the shared first metal line 51g belong to two first touch sub-electrodes 411 adjacent in the second direction D2 respectively; that is, the two first touch sub-electrodes 411 adjacent in the second direction D2 are directly adjacent through a break or spaced apart from each other through a break. For example, two second touch sub-electrodes 421 adjacent in the first direction D1 are spaced apart from each other by a part of the two first touch sub-electrodes 411 adjacent in the second direction D2.

[0187] For example, as shown in FIG. 6A, 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. Two first metal line segments in the shared first metal line 51g belong to two second touch sub-electrodes 421 adjacent in the first direction D1 respectively; that is, the two second touch sub-electrodes 421 adjacent in the first direction D1 are directly adjacent through a break or spaced apart from each other through a break. For example, two first touch sub-electrodes 411 adjacent in the second direction D2 are spaced apart from each other by a part of the two second touch sub-electrodes 421 adjacent in the first direction D1. FIG. 6A For example, as shown in FIG. 6A, 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. Two first metal line segments in the shared first metal line 51g belong to two second touch sub-electrodes 421 adjacent in the first direction D1 respectively; that is, the two second touch sub-electrodes 421 adjacent in the first direction D1 are directly adjacent through a break or spaced apart from each other through a break. For example, two first touch sub-electrodes 411 adjacent in the second direction D2 are spaced apart from each other by a part of the two second touch sub-electrodes 421 adjacent in the first direction D1.

[0188] FIG. 6A For example, as shown in FIG. 6A, 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. Two first metal line segments in the shared first metal line 51g belong to two second touch sub-electrodes 421 adjacent in the first direction D1 respectively; that is, the two second touch sub-electrodes 421 adjacent in the first direction D1 are directly adjacent through a break or spaced apart from each other through a break. For example, two first touch sub-electrodes 411 adjacent in the second direction D2 are spaced apart from each other by a part of the two second touch sub-electrodes 421 adjacent in the first direction D1. 6B As shown in FIG. 6A and FIG. 6B, each first metal grid portion includes two first metal line segments 51f, or only includes two first metal line segments 51f; or includes one complete first metal line 51 and two first metal line segments 51f, the first metal line 51 being connected between the two first metal line segments; or includes two complete first metal lines 51 and two first metal line segments 51f, the two first metal lines 51 being connected between the two first metal line segments 51f.

[0189] FIG. 6B As shown in FIG. 6A and FIG. 6B, each first metal grid portion includes two first metal line segments 51f, or only includes two first metal line segments 51f; or includes one complete first metal line 51 and two first metal line segments 51f, the first metal line 51 being connected between the two first metal line segments; or includes two complete first metal lines 51 and two first metal line segments 51f, the two first metal lines 51 being connected between the two first metal line segments 51f. FIG. 7A As shown in FIG. 6A and FIG. 6B, each first metal grid portion includes two first metal line segments 51f, or only includes two first metal line segments 51f; or includes one complete first metal line 51 and two first metal line segments 51f, the first metal line 51 being connected between the two first metal line segments; or includes two complete first metal lines 51 and two first metal line segments 51f, the two first metal lines 51 being connected between the two first metal line segments 51f.

[0190] ​​The inventors find that, at the boundary of the first touch sub-electrode and the second touch sub-electrode, there are breaks of the metal lines with high density per unit area due to insulation by the broken lines. When these breaks have certain regular continuity, the difference in reflection of ambient light at the breaks and the metal lines is obvious, resulting in a 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.

[0191] The touch structure provided by at least one embodiment of the present disclosure includes a plurality of first breaks on a first metal line at a boundary region of a first touch sub-electrode and a second touch sub-electrode. The plurality of first breaks includes a plurality of first breaks on a first line, the plurality of first breaks being respectively on a plurality of first metal lines intersecting the first line, the first line extending substantially in a direction. There is at least one first metal line between at least two first breaks, the at least one first metal line intersecting the first line, and the at least one first metal line not having a break at the intersection with the first line.

[0192] With this arrangement, the continuity of the breaks at the boundary region can be effectively broken, and the purpose of shadow elimination can be achieved.

[0193] It should be noted that the first line can be a straight line or a curve extending substantially in a direction, for example, a broken line. Due to process fluctuations, the plurality of first breaks may not be strictly on a straight line, but fluctuate up and down relative to the straight line. As long as the curve extends substantially in a fixed direction, this embodiment also falls within the protection scope of the present disclosure.

[0194] In some examples, the first line is a first straight line. For example, the plurality of first breaks are respectively on a plurality of first metal lines orthogonal to the first straight line.

[0195] The touch structure provided by at least one embodiment of the present disclosure will be exemplarily described below with the first line being a first straight line as an example, however, this does not limit the present disclosure.

[0196] FIG. 7B A shadow schematic diagram for a metal line break design. As shown in the figure, a plurality of breaks 510' on a plurality of metal lines 51' are continuously on a straight line without interruption in the middle, for example, there is no metal line in the middle of the plurality of breaks 510', and there is no break at the intersection of the metal line and the straight line. The arrangement of the metal lines produces a visually obvious shadow (shadow NG).

[0197] FIG. 8Analog diagram of shadow elimination design of touch structure provided by at least one embodiment of the present disclosure. As shown in the diagram, multiple breaks 510 on multiple parallel metal lines are located on a straight line L orthogonal to the metal lines, and the metal line 51 between at least two breaks 510 located on the straight line L does not have a break at the intersection with the straight line, thereby significantly improving the shadow problem (shadow OK).

[0198] FIG. 8 A schematic diagram of a touch structure provided by at least some embodiments of the present disclosure is shown. FIG. 8 The right side shows a schematic diagram of a touch unit in the touch structure, FIG. 8 The left side shows an enlarged schematic diagram of the boundary area of the first touch sub-electrode 411 and the second touch sub-electrode 421 of the touch structure; for example, the light grid shows the first metal grid in the first touch sub-electrode 411, and the dark grid shows the first metal grid in the second touch sub-electrode 421.

[0199] As FIG. 8 shown, in the boundary area of the first touch sub-electrode 411 and the second touch sub-electrode 421, there are multiple first breaks 510a located on a first straight line L1, and the multiple first breaks are respectively located on multiple first metal lines 51 orthogonal to the first straight line L1, and the multiple 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 the two first metal lines circled in FIG. 8 ), which intersects the first straight line L1 and has no break at the intersection.

[0200] By providing the first metal line 51c, the continuity of the multiple breaks 510a located on the first straight line L1 is broken, effectively achieving the effect of shadow elimination.

[0201] It should be noted that the multiple first breaks described above refer to the breaks between two touch sub-electrodes (such as adjacent first 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.

[0202] For example, the first straight line L1 is parallel to the first direction D1, i.e., 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.

[0203] For example, the first metal line 51e directly connected with one end of the first metal line 51c has a breakage, so that the first touch sub-electrode 411 and the second touch sub-electrode 421 are insulated; the first metal line directly connected with the other end of the first metal line 51c has at least one breakage, so that the first metal line 51c and the main body part of the touch sub-electrode (e.g. FIG. 8 as shown in the second touch sub-electrode 421) to which the first metal line 51c belongs are electrically connected.

[0204] For example, the first metal mesh 51 is a polygon with more than four sides, e.g. a pentagon or a hexagon, which can diversify the extension direction of the sides of the metal mesh, so that the arrangement of the breakages on the metal lines is not easy to have regular continuity. However, this does not limit the embodiments of the present disclosure.

[0205] As shown in FIG. 9 , the first metal mesh is a hexagon; the extension direction of the first metal line 51e is inclined to the extension direction of the first metal line 51c; for example, the extension direction of the first metal line 51e is neither parallel nor perpendicular to the first direction D1.

[0206] FIG. 8 A schematic diagram of a touch structure provided by another embodiment of the present disclosure is shown, which shows the boundary area of the first touch sub-electrode 411 and the second touch sub-electrode 421 of the touch structure; for example, the light-colored mesh shows the first metal mesh in the first touch sub-electrode 411, and the dark-colored mesh shows the first metal mesh in the second touch sub-electrode 421. A first straight line L1 is shown in the diagram. FIG. 8 Unlike the embodiment shown in FIG. 8 , the first metal mesh in this embodiment is a quadrilateral, e.g. a rectangle. For specific details, please refer to the description of the embodiment shown in

[0207] For example, there is also a breakage in the first metal line 51 inside the first touch sub-electrode 411 or the second touch sub-electrode 421, so as to reduce the difference in reflection and light emission between the first metal line inside the touch sub-electrode and the first metal line at the boundary, and improve the user experience. For example, the breakage inside the touch sub-electrode divides the first metal line into two first metal line segments, and the two first metal line segments belong to the same touch sub-electrode.

[0208] For example, the density of the breakage inside the touch sub-electrode is comparable to the density of the breakage at the boundary, so as to improve the display uniformity and the process uniformity.

[0209] For example, the design rules of the breakage inside the touch sub-electrode are similar to the design rules of the breakage at the boundary.

[0210] For example, the breakage 510 is located in the middle of the first metal line 51.

[0211] The following describes the embodiments of the present disclosure in combination with FIG. 8 The breakage inside the first touch sub-electrode is exemplarily described for the breakage inside the touch sub-electrode of the touch structure provided by the embodiments of the present disclosure.

[0212] For example, as shown in FIG. 8 For example, the breakage of the first metal line inside the first touch sub-electrode 411 includes a plurality of second breakages 510b on the second straight line L2, and the plurality of second breakages 510b are respectively located on a plurality of first metal lines 51 orthogonal to the second straight line L2; at least one first metal line 51d exists between at least two second breakages 510b, the first metal line 51d intersects the second straight line L2, and the first metal line 51d does not have breakage at the intersection with the second straight line.

[0213] For example, the second straight line L2 is parallel to the first direction D1.

[0214] This arrangement can effectively break the continuity of the breakage inside the touch sub-electrode and achieve the design of shadow elimination.

[0215] For example, as shown in FIG. 8 For example, in the interior of the first touch sub-electrode 411, at most two first metal lines of each first metal grid have breakage, thereby ensuring effective electrical connection.

[0216] For example, the demarcation area between the dummy electrode 430 in the touch sub-electrode (the first touch sub-electrode or the second touch sub-electrode) and the touch sub-electrode can also be designed with similar breakage. For example, a plurality of first metal lines located in the demarcation area between the touch sub-electrode and the dummy electrode respectively include a plurality of breakages, each of the plurality of breakages separates the first metal line where it is located into two first metal line segments, one of which belongs to the touch sub-electrode and the other of which belongs to the dummy electrode, thereby insulating the touch sub-electrode and the dummy electrode. The plurality of breakages include a plurality of third breakages on a third straight line, and the plurality of third breakages are respectively located on a plurality of first metal lines intersecting the third straight line; at least one first metal line exists between at least two third breakages, each of the at least one first metal line intersects the third straight line, and each of the at least one first metal line does not have breakage at the intersection with the third straight line. For example, the third straight line can be a straight line parallel to the first direction D1. FIG. 10 The left enlarged schematic view can be understood similarly as the demarcation area between the touch sub-electrode and the dummy electrode (for example FIG. 10 For example, as shown in the enlarged schematic view on the right, the breakage of the first metal line in the demarcation area between the touch sub-electrode and the dummy electrode includes a plurality of fourth breakages 510c on a fourth straight line L4, and the plurality of fourth breakages 510c are respectively located on a plurality of first metal lines 51 orthogonal to the fourth straight line L4; at least one first metal line 51d exists between at least two fourth breakages 510c, the first metal line 51d intersects the fourth straight line L4, and the first metal line 51d does not have breakage at the intersection with the fourth straight line.

[0217] This arrangement can effectively break the continuity of the boundary between the touch sub-electrode and the dummy electrode inside it, and achieve the design of shadow elimination.

[0218] The embodiments of the present disclosure also provide a touch panel comprising the above touch structure.

[0219] FIG. 10 A schematic diagram of a touch panel according to at least one embodiment of the present disclosure is shown in FIG. 8. As shown in FIG. 8, the touch panel 80 comprises 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 electrodes 410 extend along the width direction of the rectangle, and the second touch electrodes 420 extend along the length direction of the rectangle. For the sake of clarity, the structures of the first touch electrodes and the second touch electrodes are not shown in detail. FIG. 10

[0220] For example, as shown in FIG. 8, the touch panel 80 further comprises 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 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 electrodes 410 are touch driving electrodes, and the second touch electrodes 420 are touch sensing electrodes, but the embodiments of the present disclosure are not limited thereto. FIG. 10

[0221] The touch integrated circuit is, for example, a touch chip, which is configured to provide touch driving signals to the second touch electrodes 420 in the touch panel 80, receive touch sensing signals from the first touch electrodes 410, and process the touch sensing signals, for example, provide the processed data / signals to a system controller to realize touch sensing functions.

[0222] For example, as shown in FIG. 8, one end of the plurality of signal lines 450 connected to the touch integrated circuit can be arranged on the same side (for example, the lower side in FIG. 8) of the touch area 301, which can facilitate the connection with the touch integrated circuit. FIG. 10 FIG. 11

[0223] For example, as shown in FIG. 8, since the second touch electrodes 420 are longer than the first touch electrodes 410 and have a larger load, in order to improve the signal transmission speed, one signal line 450 can be arranged at each end of one first touch electrode 410, and the touch integrated circuit can simultaneously input touch driving signals to one second touch electrode 420 through the two signal lines 450 (double-sided driving) during operation, so that the signal loading speed on the second touch electrode 420 is improved, thereby improving the detection speed. ​ ​​​​​

[0224] For example, the material of the first metal mesh layer 50 or the second metal mesh layer 60 includes a metal material such as aluminum, molybdenum, copper, silver, or an alloy material of these metal materials, for example, an APC material.

[0225] For example, the width (the size along the length direction of the metal line) of each break is 5.2 microns.

[0226] For example, the material of the insulating layer 70 can be an inorganic insulating material, for example, the inorganic insulating material is a transparent material. For example, the inorganic insulating material is an oxide of silicon such as silicon oxide, silicon nitride, silicon oxynitride, or a nitride or oxynitride of silicon, or a metal nitride insulating material such as aluminum oxide or titanium nitride.

[0227] For example, the material of the insulating layer 70 can 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 OCA optical glue. For example, the organic insulating material can include polyimide (PI), acrylate, epoxy resin, polymethyl methacrylate (PMMA), or the like.

[0228] The embodiments of the present disclosure also provide an electronic device including the above-described touch control structure 40, the above-described touch control display panel 20, or the above-described touch control panel 80. For example, the electronic device is a touch control display device integrated with a touch control function, which can be any product or component with a display function and a touch control function, such as a display, an OLED panel, an OLED television, electronic paper, a mobile phone, a tablet computer, a notebook computer, a digital photo frame, a navigator, or the like.

[0229] ​ 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 control display device including a touch control panel 80 and a display panel 81, and the display panel 81 and the touch control panel 80 are arranged in a stack. The display panel 81 includes a display area 802 and a non-display area 801. For example, the display area 301 and the touch control area 801 are aligned with and correspond to each other, and the non-display area 802 and the non-touch control area 302 are aligned with and correspond to each other. The display panel 81 and the touch control panel 80 are fixed to each other, for example, by adhesive, or are integrally formed, that is, the touch control panel 80 is directly formed on the display panel 81 with the display panel 81 as a substrate.

[0230] The above merely provides exemplary embodiments of the present disclosure, but is not intended to limit the protection scope of the present disclosure, which is defined by the appended claims.

Claims

1. A touch display panel comprising a base substrate and a display structure and a touch structure stacked on the base substrate. in, The display structure includes a plurality of pixel opening areas, the plurality of pixel opening areas are arranged along a first direction and a second direction, the first direction and the second direction intersecting; The touch structure includes a first metal grid layer, the first metal grid layer includes a plurality of first metal grids defined by a plurality of first metal lines, and the orthographic projections of the plurality of first metal lines on the base substrate are located outside the orthographic projections of the plurality of pixel opening areas on the base substrate; The orthographic projection of each mesh of the at least one first metal grid on the base substrate covers the orthographic projection of two adjacent pixel opening areas among the plurality of pixel opening areas on the base substrate, and the two adjacent pixel opening areas are both configured to emit light of a first primary color; The center distance between the two adjacent pixel opening areas is smaller than the center distance between the two pixel opening areas emitting light of the same other basic color; The orthographic projections of meshes of other first metal grids directly connected to the at least one first metal grid in the first direction on the base substrate each only cover the orthographic projection of one pixel opening area on the base substrate; The plurality of first metal grids are arranged along the first direction and the second direction; Each of the plurality of first metal grids is a polygon with four or more sides; the longest sides of at least two first metal grids extend in parallel with each other and along the second direction.

2. The touch display panel according to claim 1, wherein: An area of ​​at least one of the two adjacent pixel opening regions is smaller than an area of ​​a pixel opening region that emits light of other basic colors.

3. The touch display panel according to claim 2, wherein: The areas of the two adjacent pixel opening regions are equal and are both smaller than the areas of the pixel opening regions of the sub-pixels emitting light of other basic colors.

4. The touch display panel according to claim 1, wherein: The first basic color is green.

5. The touch display panel according to any one of claims 1 to 4, wherein: The pixel opening area contour of the pixel opening area corresponding to each first metal grid is a polygon with four or more sides, and each side of each first metal grid is parallel to each side of the corresponding pixel opening area contour in a one-to-one correspondence.

6. The touch display panel according to claim 5, wherein: The two sides of the contours of two adjacent pixel opening areas that are close to each other are parallel to each other, and a first metal line is arranged between them; the orthographic projections of the two sides of the contours of two adjacent pixel opening areas that are close to each other on the substrate are parallel to the orthographic projection of the first metal line on the substrate, and the spacing between them and the orthographic projection of the first metal line on the substrate is the same.

7. The touch display panel according to any one of claims 1 to 4, wherein: The multiple pixel opening areas also include a pixel opening area configured to emit light of a second basic color and a pixel opening area configured to emit light of a third basic color, and the areas of the pixel opening area emitting light of the first basic color, the pixel opening area emitting light of the second basic color, and the pixel opening area emitting light of the third basic color increase sequentially.

8. The touch display panel according to claim 7, wherein: The first basic color is green, the second basic color is red, and the third basic color is blue.

9. The touch display panel according to claim 8, wherein: The first metal grid corresponding to the pixel opening area emitting light of the second basic color includes a first side and a second side, the first side is neither parallel to nor orthogonal to the first direction or the second direction, and the second side is neither parallel to nor orthogonal to the first direction or the second direction; the first side is longer than the second side.

10. The touch display panel according to any one of claims 1 to 4, wherein: The first metal grid layer includes a plurality of first touch sub-electrodes and a plurality of first connecting electrodes arranged along the 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 further includes a plurality of second touch sub-electrodes sequentially arranged along a second direction and spaced apart from each other; Each of the plurality of first touch sub-electrodes and each of the plurality of second touch sub-electrodes are spaced apart from each other and respectively include a plurality of first metal meshes.

11. The touch display panel according to claim 10, wherein: The touch structure further includes a second metal grid layer; 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 second metal grid layer includes a plurality of second metal grids defined by a plurality of second metal lines, wherein the orthographic projections of the plurality of second metal lines on the base substrate are located outside the orthographic projections of the plurality of pixel opening areas on the base substrate; The second metal grid layer includes a plurality of second connecting electrodes spaced apart from each other, each of the plurality of second connecting electrodes being 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.

12. The touch display panel according to claim 11, wherein: The multiple second metal lines in at least two second metal grids in each of at least part of the second connecting electrodes overlap with the multiple first metal lines of at least two first metal grids of the adjacent second touch sub-electrodes in a direction perpendicular to the base substrate, so that the at least two first metal grids have multiple vertices overlapping with the at least two second metal grids, and each of the multiple vias is located at a vertex.

13. The touch display panel according to claim 12, wherein: The at least two second metal grids are edge metal grids of the second connection electrodes, and the at least two first metal grids are edge metal grids of the second touch electrodes.

14. The touch display panel according to claim 13, wherein: At least some of the adjacent second touch sub-electrodes are electrically connected via two second connecting electrodes. The two second connection electrodes are spaced apart from each other and symmetrical with respect to a central axis extending in the second direction; Furthermore, an orthographic projection of at least part of each of the first connecting electrodes on the second metal grid layer is located in a gap between the two second connecting electrodes between adjacent second touch sub-electrodes.

15. The touch display panel according to claim 10, 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.

16. A touch display panel comprising a base substrate and a display structure and a touch structure stacked on the base substrate. in, The display structure includes a plurality of pixel opening areas, the plurality of pixel opening areas are arranged along a first direction and a second direction, the first direction and the second direction intersecting; The touch structure includes a first metal grid layer, the first metal grid layer includes a plurality of first metal grids defined by a plurality of first metal lines, and the orthographic projections of the plurality of first metal lines on the base substrate are located outside the orthographic projections of the plurality of pixel opening areas on the base substrate; The orthographic projection of each mesh of the at least one first metal grid on the base substrate covers the orthographic projection of two adjacent pixel opening areas among the plurality of pixel opening areas on the base substrate, and the two adjacent pixel opening areas are both configured to emit light of a first primary color; A line connecting the centers of the two adjacent pixel opening areas is parallel to the second direction, and an orthographic projection of the line connecting the centers on a plane perpendicular to the second direction is outside an orthographic projection of a pixel opening area emitting light of other primary colors on the plane perpendicular to the second direction; The orthographic projection of each of the two adjacent pixel opening areas on the plane perpendicular to the first direction overlaps with the orthographic projection of at least one pixel opening area emitting light of the second basic color on the plane perpendicular to the first direction and the orthographic projection of at least one pixel opening area emitting light of the third basic color on the plane perpendicular to the first direction.

17. An electronic device comprising the touch display panel according to any one of claims 1 to 16.

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