Display board and display device

Abstract

SOLUTION: To provide a display board in which the display board includes a base board, a first metal signal line layer, and a metal touch layer, the first metal signal line layer is positioned in the base board, and includes first multiple metal signal lines extending along a first direction, multiple metal connection signal lines are included between each of two adjacent first metal signal lines, the metal connection signal lines connect the first two adjacent metal signal lines, a metal touch layer is positioned in a side separated from the base board of the first metal signal line layers and includes multiple crossing grid lines, at least one portion of the metal connection signal lines is parallel with the grid line of the metal touch layer, and a part parallel with the grid line of the metal touch layer of the metal connection signal lines overlaps with the grid line of the metal touch layer in a direction vertical to the base board.EFFECT: The metal connection signal lines of a display board are parallel with the grid line of a metal touch layer, and overlaps with the grid line of the metal touch layer, and a first metal signal line layer and the metal touch layer can reduce an area for blocking the display board.SELECTED DRAWING: Figure 2A

Description

[Technical Field]

[0001] The embodiments of the present disclosure relate to a display substrate and a display device. [Background technology]

[0002] Organic light-emitting diode (OLED) display panels have the advantages of light weight, active light emission, wide viewing angle, low driving voltage, high luminous efficiency, low power consumption, and fast response time, and have therefore been widely applied in various electronic products. Fingerprint detection has now become an important verification method for electronic products, and display fingerprint detection technology in particular helps realize narrow-frame designs for display panels. The industry is currently proposing an increasing number of display fingerprint detection solutions for electronic products, mainly including optical, ultrasonic, and capacitive display fingerprint detection, with optical display fingerprint detection technology being the most widely used. Optical display fingerprint detection technology uses light reflection to detect fingerprint circuits, and the captured fingerprint image is compared with an image in a database to achieve the purpose of fingerprint detection. Optical display fingerprint detection technology is particularly widely applied in OLED display panels. Summary of the Invention [Means for solving the problem]

[0003] An embodiment of the present disclosure provides a display substrate and a display device, in which at least a portion of the metal connection signal lines of the display substrate are parallel to and overlap with the grid lines of the metal touch layer, so as to reduce the area of ​​the light-transmitting gap of the display substrate that is blocked by the first metal signal line layer and the metal touch layer, thereby improving the display fingerprint detection sensitivity of the display device using the display substrate.

[0004] An embodiment of the present disclosure provides a display substrate, including: a base substrate; a first metal signal line layer located on the base substrate, the first metal signal lines extending along a first direction, a plurality of metal connection signal lines between every two adjacent first metal signal lines, the metal connection signal lines connecting the adjacent first metal signal lines; and a metal touch layer located on a side of the first metal signal line layer away from the base substrate, the first metal signal line layer including a plurality of intersecting grid lines, the plurality of grid lines forming a plurality of grids arranged in an array, at least a portion of the metal connection signal lines being parallel to the grid lines of the metal touch layer, and in a direction perpendicular to the base substrate, the portions of the metal connection signal lines parallel to the grid lines of the metal touch layer at least partially overlap with the grid lines of the metal touch layer.

[0005] In some examples, the metal interconnect signal line is a polygonal line and includes a first metal interconnect line segment and a second metal interconnect line segment that are connected to each other.

[0006] In some examples, the first metal connection lines extend along a second direction perpendicular to the first direction, and the second metal connection lines extend along a direction that forms an acute or obtuse angle with respect to the first direction.

[0007] In some examples, the second metal connection lines are parallel to the grid lines of the metal touch layer, and in a direction perpendicular to the base substrate, the second metal connection lines overlap the grid lines of the metal touch layer.

[0008] In some examples, the overlapping area between the second metal connection line segments and the grid lines in a direction perpendicular to the base substrate is greater than 50% of the area of ​​the metal connection signal lines.

[0009] In some examples, in a direction perpendicular to the base substrate, the first metal connection line segments at least partially overlap the grid lines located at corners of the grid.

[0010] In some examples, an overlap area between the first metal connection line segment and the grid line located at a corner of the grid is smaller than an overlap area between the second metal connection line segment and the metal touch layer grid line.

[0011] In some examples, the grid lines include a plurality of breakpoints, and the second metal connection line segments overlap at least some of the breakpoints in a direction perpendicular to the base substrate.

[0012] In some examples, the length of the second metal connection line segment is greater than the length of the first metal connection line segment.

[0013] In some examples, the display substrate includes a plurality of light-emitting elements arranged in an array, and a transparent gap is formed between adjacent light-emitting elements; in a direction perpendicular to the base substrate, the light-emitting elements are located between the metal touch layer and the first metal signal line layer; the grids correspond one-to-one to the light-emitting elements; the orthogonal projection of each light-emitting element on the base substrate is located within the orthogonal projection of the corresponding grid on the base substrate; and the area of ​​the orthogonal projection of the light-emitting element on the base substrate is smaller than the area of ​​the orthogonal projection of the corresponding grid on the base substrate.

[0014] In some examples, the light-emitting elements include red, green, and blue light-emitting elements, and in a direction perpendicular to the base substrate, a middle portion of the first metal connection line segment corresponding to the green light-emitting element does not overlap with the grid line, both ends of the first metal connection line segment corresponding to the green light-emitting element overlap with the grid line, the first metal connection line segment corresponding to the red light-emitting element completely overlaps with the grid line, a middle portion of the first metal connection line segment corresponding to the blue light-emitting element does not overlap with the grid line, and both ends of the first metal connection line segment corresponding to the blue light-emitting element overlap with the grid line.

[0015] In some examples, the display substrate further includes a second metal signal line layer located on a side of the first metal signal line layer closest to the base substrate, the second metal signal line layer including a plurality of second metal signal lines extending along the first direction, and the plurality of second metal signal lines electrically connected to the plurality of first metal signal lines.

[0016] In some examples, the metal connecting signal lines do not overlap the light emitting elements in a direction perpendicular to the base substrate.

[0017] In some examples, the display substrate further includes a pixel limiting layer, the pixel limiting layer including a plurality of apertures arranged in an array, the apertures corresponding one-to-one to the light-emitting elements, and the apertures in the pixel limiting layer limit the effective light-emitting area of ​​the light-emitting elements.

[0018] In some examples, the display substrate further includes a packaging layer that covers the light-emitting element, and the metal touch layer is located on a side of the packaging layer that is away from the base substrate.

[0019] In some examples, the display substrate further includes a data line, which is in the same layer as the second metal signal line layer, parallel to the second metal signal line, and insulated from the second metal signal line.

[0020] In some examples, the metal touch layer includes a touch electrode bridge layer, an insulating layer, and a touch electrode layer that are stacked together, the insulating layer being located between the touch electrode bridge layer and the touch electrode layer, and the insulating layer including a via connecting the touch electrode bridge layer and the touch electrode layer.

[0021] In some examples, the first metal signal line is a power cord.

[0022] In some examples, the display substrate further includes at least one thin film transistor and a connection electrode located between the base substrate and the light-emitting element, the at least one thin film transistor including an active layer located on the base substrate, a gate electrode located on a side of the active layer away from the base substrate, and a source electrode and a drain electrode located on a side of the gate electrode away from the base substrate, the connection electrode being located between the at least one thin film transistor and the light-emitting element and being electrically connected to the drain electrode of the at least one thin film transistor and the light-emitting element, the first metal signal line layer being located in the same layer as the connection electrode, and the second metal signal line layer being located in the same layer as the source electrode.

[0023] In some examples, the base substrate is a flexible base substrate.

[0024] An embodiment of the present disclosure further provides a display device including the display substrate described above.

[0025] In some examples, the display device further includes a fingerprint sensor located on a side of the base substrate away from the first metal signal line layer and configured to detect a fingerprint on the display substrate. [Brief explanation of the drawings]

[0026] In order to more clearly describe the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments are briefly described below. Obviously, the drawings described below are only related to some embodiments of the present disclosure and are not intended to limit the present disclosure. [Figure 1] Figure 1 is a schematic diagram of an OLED display panel with display fingerprint detection function. [Figure 2A] FIG. 2A is a schematic plan view of a display substrate according to an embodiment of the present disclosure. [Figure 2B] FIG. 2B is a schematic cross-sectional view of the display substrate shown in FIG. 2A taken along line AA. [Figure 2C]FIG. 2C is a partially enlarged schematic diagram of the display substrate indicated by the dotted frame D in FIG. 2A. [Figure 3] FIG. 3 is a schematic plan view of the structure of a first metal signal line layer according to an embodiment of the present disclosure. [Figure 4] FIG. 4 is a schematic plan view of the metal touch layer according to an embodiment of the present disclosure. [Figure 5] FIG. 5 is a schematic plan view of the structure of a light-emitting device according to an embodiment of the present disclosure. [Figure 6] FIG. 6 is a partial schematic diagram of a planar structure of a display substrate according to an embodiment of the present disclosure. [Figure 7] FIG. 7 is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present disclosure, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of the embodiments. Based on the described embodiments of the present disclosure, any other embodiments that a person skilled in the art can obtain without inventive efforts fall within the scope of protection of the present disclosure.

[0028] Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meaning understood by those skilled in the art to which this disclosure belongs. The terms "first," "second," and similar terms used in this disclosure do not denote any order, number, or importance, but are merely used to distinguish different components. Similar terms such as "comprise" or "comprises" indicate that the elements or components described before the term cover the elements or components listed after the term and their equivalents, and do not exclude other elements or components. Similar terms such as "connect" or "coupled" are not limited to physical or mechanical connections, but also include electrical connections, whether direct or indirect. Terms such as "top," "bottom," "left," "right," and the like only refer to relative positions; if the absolute positions of the described objects change, the relative positions may change accordingly.

[0029] Display fingerprint detection methods generally use the light from the display panel itself as the light source, and fingerprint sensors are generally installed on the non-display side of the display panel or integrated into the functional layer of the display panel, thereby achieving display fingerprint detection. OLEDs have the property of actively emitting light, and their light emission can be further controlled or modulated as needed, which can facilitate fingerprint image collection and help improve the integration of electronic devices. Currently, OLED display panels usually use optical display fingerprint detection methods to achieve unlocking or other functions.

[0030] 1 is a schematic diagram of an OLED display panel with a display fingerprint detection function. As shown in FIG. 1, the OLED display panel includes a top film 21, a thin film packaging layer 22, a pixel unit array 23 and a base substrate 24.

[0031] The base substrate 24 provides protection and support for the other structural and functional layers disposed thereon, and may be, for example, a plastic or glass substrate.

[0032] The pixel unit array 23 is formed on a base substrate 24 and includes a plurality of pixel units arranged in a predetermined array. The light 101 emitted by the pixel units is used for display and is also used as light for display fingerprint detection.

[0033] The thin film packaging layer 22 covers the pixel unit array 23 to prevent external water vapor from entering the pixel unit array 23 and causing its aging or deterioration, and may be a multi-layer thin film packaging layer, for example, including an inorganic packaging layer and an organic packaging layer stacked one on top of the other.

[0034] The fingerprint sensor 25 for collecting fingerprint images is installed on the side of the base substrate 24 away from the pixel unit array 23 (i.e., the lower side in the figure) (for example, it is adhered to the side of the base substrate 24 away from the pixel unit array 23 with an optically transparent adhesive (OCA)), and is used to detect reflected light 102 for fingerprint detection reflected from the fingerprint 30 on the surface of the top film 21. The fingerprint sensor 25 has a certain area and includes, for example, a plurality of detection units arranged in a predetermined array.

[0035] If necessary, the OLED display panel may further include other structural or functional layers. For example, the OLED display panel may include a touch structure to realize a touch function. The touch structure may be, for example, built into the pixel unit array 23, formed on the top film 21, or formed on the package structure 22, etc., and may be, for example, a capacitive type, a resistive type, etc.

[0036] To realize the display fingerprint detection function, the top layer film 21, the thin film package 22 and the base substrate 24 are at least partially transparent or translucent, or a light-transmitting gap 231 is formed between adjacent pixel units in the pixel unit array 23, so that the reflected light of the fingerprint on the surface of the top layer film 21 can pass through the transparent / translucent film layer or the light-transmitting gap and enter the fingerprint sensor 25, thereby obtaining a fingerprint image.

[0037] The inventors of the present application have discovered that there are multiple types of metal wirings (such as power signal lines, gate signal lines, data signal lines, metal touch layers, touch signal lines, etc.) on the OLED display substrate, and when these multiple types of metal wirings are stacked, they will block the transparent / semi-transparent film layer or the transparent gap 231, thereby affecting the sensitivity of fingerprint detection.

[0038] In response to the above-mentioned problems, an embodiment of the present disclosure provides a display substrate and a display device. The display substrate includes a base substrate, a first metal signal line layer, and a metal touch layer. The first metal signal line layer is located on the base substrate and includes a plurality of first metal signal lines extending along a first direction, with a plurality of metal connection signal lines between every two adjacent first metal signal lines, the metal connection signal lines connecting the adjacent first metal signal lines. The metal touch layer is located on a side of the first metal signal line layer away from the base substrate and includes a plurality of intersecting grid lines, forming a plurality of grids arranged in an array. At least a portion of the metal connection signal lines is parallel to the grid lines of the metal touch layer, and in a direction perpendicular to the base substrate, the portions of the metal connection signal lines parallel to the grid lines of the metal touch layer overlap the grid lines of the metal touch layer. The metal connection signal lines of the display substrate are parallel to and overlap the grid lines of the metal touch layer, which can reduce the area of ​​the transparent / semi-transparent film layer or transparent gap of the display substrate that is blocked by the first metal signal line layer and the metal touch layer, thereby improving the display fingerprint detection sensitivity of the display device using the display substrate and realizing large-area display fingerprint recognition.

[0039] Hereinafter, a display substrate and a display device according to an embodiment of the present disclosure will be described with reference to the drawings.

[0040] An embodiment of the present disclosure provides a display substrate. Figure 2A is a schematic planar structural view of the display substrate according to the embodiment of the present disclosure, and Figure 2B is a schematic cross-sectional structural view of the display substrate taken along line AA of Figure 2A. Note that, in order to more clearly show the overlapping relationship between the first metal signal line layer and the metal touch layer, Figure 2A is a schematic planar structural view of the display substrate viewed from the non-display side toward the display side, and therefore, in Figure 2A, the first metal signal line layer is located on the upper surface of the metal touch layer.

[0041] As shown in FIGS. 2A and 2B, the display substrate includes a base substrate 100, a first metal signal line layer 200 having a first grid pattern located on the base substrate 100, a metal touch layer 300 having a second grid pattern located on the side of the first metal signal line layer 200 away from the base substrate 100, and a light emitting element 520 located between the first metal signal line layer 200 and the metal touch layer 300. FIG. 2A schematically shows the planar structures of the first metal signal line layer 200, the metal touch layer 300, and the light emitting element 520 of the display substrate, as well as their positional relationship. As shown in FIG. 2A, the first metal signal line layer 200 and the metal touch layer 300 overlap each other in a direction perpendicular to the base substrate 100 (i.e., a direction perpendicular to the XY plane in the figure). FIGS. 3 to 5 show the planar structures of the first metal signal line layer 200, the light emitting element 520, and the metal touch layer 300, respectively. 3 is a schematic plan view of the first metal signal line layer 200, FIG. 4 is a schematic plan view of the metal touch layer 300, and FIG. 5 is a schematic plan view of the light emitting device 520. As shown in FIG.

[0042] For example, as shown in FIGS. 2A and 3 , the first metal signal line layer 200 includes a plurality of first metal signal lines 210 extending along the first direction Y, and a plurality of metal connecting signal lines 220 are included between every two adjacent first metal signal lines 210, and adjacent first metal signal lines 210 are connected by the plurality of metal connecting signal lines 220, so that the plurality of first metal signal lines 210 and the plurality of metal connecting signal lines 220 form a first grid pattern of the first metal signal line layer 200.

[0043] For example, as shown in FIG. 4 , the metal touch layer 300 having the second grid pattern includes a plurality of interconnected grid lines 320, which form a plurality of array-shaped grids 310. For example, as shown in FIG. 4 , the grid lines 320 include a plurality of first grid lines 321 extending along a direction that forms an acute angle with the first direction Y, and a plurality of second grid lines 322 perpendicular to the first grid lines 321. The plurality of first grid lines 321 and the plurality of second grid lines 322 surround a plurality of rectangular grids 310. For example, as shown in FIG. 4 , the shapes and dimensions of the plurality of rectangular grids 310 are not completely identical. Of course, FIG. 4 is merely an example, and the embodiment of the present disclosure is not limited to the first grid lines 321 being perpendicular to the second grid lines 322. For example, the second grid lines 322 and the first grid lines 321 may intersect rather than be perpendicular to each other, and in this case, a plurality of parallelogram grids 310 are enclosed by the plurality of first grid lines 321 and the plurality of second grid lines 322.

[0044] 2A , at least a portion of the metal connection signal line 220 is parallel to the grid lines 320 of the metal touch layer 300, and in a direction perpendicular to the base substrate 100, the portion of the metal connection signal line 220 that is parallel to the grid lines 320 of the metal touch layer 300 overlaps with the grid lines 320 of the metal touch layer 300. For example, the parallel corresponding portions of the metal connection signal line 220 and the metal touch line 300 may completely overlap or may partially overlap. For example, the widths of the parallel corresponding portions of the metal connection signal line 220 and the grid lines 320 of the metal touch layer 300 may be the same or different. For example, in the parallel and corresponding portions of the metal connection signal lines 220 and the grid lines 320 of the metal touch layer 300, the orthogonal projection of the corresponding portions of the metal connection signal lines 220 on the base substrate may be completely located within the orthogonal projection of the corresponding portions of the grid lines 320 of the metal touch layer 300 on the base substrate, or the orthogonal projection of the corresponding portions of the grid lines 320 of the metal touch layer 300 on the base substrate may be completely located within the orthogonal projection of the corresponding portions of the metal connection signal lines 220 on the base substrate. In such cases, the light-blocking range of the grid lines and the metal connection signal lines of the metal touch layer can be reduced to the maximum. In some examples, in a direction perpendicular to the extension direction of the parallel and corresponding portions of the metal connection signal lines 220 and the grid lines 320 of the metal touch layer 300, the corresponding portions of the grid lines 320 of the metal touch layer 300 and the corresponding portions of the metal connection signal lines 220 are offset from each other, but at least partially overlap each other. In such cases, the light-blocking range of the grid lines and the metal connection signal lines of the metal touch layer can also be reduced.

[0045] In addition, although at least a portion of the metal connection signal line is parallel to the grid line of the metal touch layer, it is not necessarily absolutely parallel, and a certain error range is allowed. The portion of the metal connection signal line parallel to the grid line of the metal touch layer overlaps with the grid line of the metal touch layer, meaning that the orthogonal projection of the portion of the metal connection signal line parallel to the grid line of the metal touch layer on the base substrate at least partially overlaps with the orthogonal projection of the grid line of the metal touch layer on the base substrate.

[0046] As mentioned above, by at least partially overlapping the grid lines of the metal touch layer with the metal connecting signal lines in the above manner, both light blocking areas can be reduced.

[0047] In some examples, within the area where the metal touch layer is installed (i.e., the touch area), the length of the portion of the metal connection signal line 220 that is parallel to and overlaps the grid lines 320 of the metal touch layer occupies 50% or more of the total length of the metal connection signal line 220.

[0048] 2A , in a direction perpendicular to the base substrate 100, the first metal connection line segment 221 at least partially overlaps with the grid line 320 located at the corner of the grid 310. For example, the first metal connection line segment and the grid line at the corner overlap at multiple positions (one of the overlap positions is shown in the dotted rectangular box C in the figure). For example, the overlap area between the first metal connection line segment 221 and the grid line 320 located at the corner of the grid 310 is smaller than the overlap area between the second metal connection line segment 222 and the grid line 320 of the metal touch layer 300.

[0049] 2A and 4, the grid lines 320 of the metal touch layer include a plurality of breakpoints 321, and the second metal connection line segments 222 overlap at least some of the breakpoints 320 in a direction perpendicular to the base substrate. Note that while the breakpoints 320 that do not overlap the second metal connection line segments 222 are visible in FIG. 2A, the plurality of breakpoints 320 that overlap the second metal connection line segments 222 are not visible because the breakpoints 321 that overlap the second metal connection line segments 222 are blocked by the second metal connection line segments 222.

[0050] For example, the base substrate 100 may be an inorganic material such as a glass plate, a quartz plate, a metal plate, etc. For example, the material of the base substrate may further include an organic material, for example, the organic material may be a resin-based material such as polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate, and polyethylene naphthalate. The base substrate 100 may be a flexible substrate or a non-flexible substrate, and the embodiments of the present disclosure are not limited thereto.

[0051] For example, the materials of the first metal signal line layer 200 and the metal touch layer 300 may include metal materials or alloy materials, and may be a single-layer metal or a multi-layer metal stack. For example, the first metal signal line layer 200 and the metal touch layer 300 may both be made of a three-layer metal stack of titanium, aluminum, and titanium (Ti / Al / Ti).

[0052] FIG. 5 is a schematic planar view of the light-emitting element of the display substrate. For example, as shown in FIGS. 2A, 2B, and 5, the display substrate further includes a plurality of light-emitting elements 520 arranged in an array. In a direction perpendicular to the base substrate 100, the light-emitting elements 520 are located between the metal touch layer 300 and the first metal signal line layer 200. A light-transmitting gap 530 is formed between adjacent light-emitting elements 520, allowing the light 102 reflected by the display side (top in FIG. 2B) of the display substrate to pass through. Note that the light-transmitting gap 530 does not necessarily refer to a transparent gap, but may also be a light-transmitting area of ​​the display substrate. For example, the grids 310 of the metal touch layer may correspond one-to-one to the light-emitting elements 520, and the orthographic projection of each light-emitting element 520 on the base substrate 100 is located within the orthographic projection of the corresponding grid 310 on the base substrate 100, and the area of ​​the orthographic projection of the light-emitting element 520 on the base substrate 100 is smaller than the area of ​​the orthographic projection of the corresponding grid 310 on the base substrate 100. For example, as shown in FIG. 2A, the orthogonal projection of the light emitting element 520 on the base substrate 100 and the orthogonal projection of the corresponding grid 310 on the base substrate 100 jointly divide the light-transmitting gap 530 into a plurality of annular gaps.

[0053] FIG. 2C is a partially enlarged schematic diagram of the display substrate indicated by the dotted-line frame D in FIG. 2A. For example, as shown in FIGS. 2A, 2C, and 5, the light-emitting element 520 includes a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B. One red light-emitting element R, two green light-emitting elements G, and one blue light-emitting element B constitute one pixel unit (shown by the dotted-line frame in FIG. 5). As shown in FIG. 2A, the first metal connection line segment 221 corresponding to the green light-emitting element G incompletely overlaps with the grid line 320 in a direction perpendicular to the base substrate. For example, as shown in FIG. 2C, the middle portion 2211 of the first metal connection line segment 221 corresponding to the green light-emitting element G does not overlap with the grid line 320, and both ends 2212 of the first metal connection line segment 221 corresponding to the green light-emitting element G overlap with the grid line 320 at the bend. For example, as shown in FIG. 2C, the first metal connection line segment 221 corresponding to the red light-emitting element R completely overlaps with the grid line 320. For example, as shown in FIG. 2C , the middle portion 2213 of the first metal connection segment 221 corresponding to the blue light-emitting element B does not overlap with the grid line 320, while both ends 2214 of the first metal connection segment 221 corresponding to the blue light-emitting element B overlap with the grid line 320 at the corner.

[0054] The first metal connection line segment 221 corresponding to the green light emitting element G refers to the first metal connection line segment 221 of the grid where the green light emitting element G is located. The first metal connection line segments 221 corresponding to the red light emitting element R and the blue light emitting element B refer to the first metal connection line segments 221 located above the red light emitting element R and the blue light emitting element B in FIG. 2A along the first direction Y. The positions of the green light emitting element G, the red light emitting element R, and the blue light emitting element B may be interchanged, and the present disclosure does not limit this.

[0055] For example, a display substrate according to an embodiment of the present disclosure further includes a pixel confining layer 510. As shown in Figures 2A, 2B and 5, the pixel confining layer 510 includes a plurality of apertures 511 arranged in an array, the apertures 511 corresponding to the light emitting elements 520 one-to-one, and at least a portion of the light emitting elements 520 being located within the corresponding apertures 511. The light-transmitting gaps 530 are located between adjacent apertures 511.

[0056] Although FIG. 2B schematically illustrates a situation in which the light-emitting element 520 is disposed within the opening of the pixel confining layer 510, the embodiments of the present disclosure are not limited to this situation. For example, the light-emitting element 520 may include an electroluminescent layer and an anode and a cathode located on both sides of the electroluminescent layer. For example, the electroluminescent layer may be an organic light-emitting layer. For example, the organic light-emitting layer may be manufactured by a method such as vapor deposition or may be a continuous layer, but the portion of the organic light-emitting layer located within the opening 511 constitutes the effective light-emitting area of ​​the pixel unit. The light-emitting element 520 described in the embodiments of the present disclosure may include only the organic light-emitting layer located within the opening 511, i.e., the light-emitting element 520 may only comprise the effective light-emitting area of ​​the pixel unit. Furthermore, for example, the anode forming the light-emitting element 520 may be formed outside the opening of the pixel confining layer 510. The specific structure of the light-emitting element 520 will be further described below with reference to FIG. 7.

[0057] 2B , the pixel limiting layer 510 is a layer having a certain light transmittance, and the pixel limiting layer 510 between the light emitting elements 520 may allow the reflected light 102 to pass through. That is, the pixel limiting layer 510 between the light emitting elements 520 may be a light-transmitting gap 530.

[0058] For example, the material of the pixel limiting layer 510 may include organic insulating materials such as polyimide, polyamide, acrylic resin, benzocyclobutene, or phenolic resin, or inorganic insulating materials such as silicon oxide, silicon nitride, etc., and the embodiments of the present disclosure are not limited thereto.

[0059] In the display substrate according to an embodiment of the present disclosure, at least a portion of the metal connection signal lines is parallel to and overlaps with the grid lines of the metal touch layer, thereby reducing the area of ​​the light-transmitting gap of the display substrate that is blocked by the metal connection signal lines and the metal touch layer, thereby improving the display fingerprint detection sensitivity of the display device using the display substrate and realizing large-area display fingerprint recognition. In addition, by at least partially overlapping the grid lines of the metal touch layer with the metal connection signal lines, the area required for installing non-light-transmitting circuits can be further reduced, thereby improving the pixel aperture ratio of the display substrate.

[0060] For example, as shown in FIG. 2A , the light-emitting element 520 is rectangular, and the grid 310 is also rectangular. Of course, the shapes of the light-emitting element 520 and the grid 310 are not limited to rectangular. For example, although the shapes and dimensions of the light-emitting elements shown in FIGS. 2A and 5 are the same, the embodiments of the present disclosure are not limited thereto. Depending on actual needs, the shapes and dimensions of different light-emitting elements 520 may not be completely identical, and accordingly, the shapes and dimensions of the grid 310 may not be completely identical.

[0061] FIG. 6 is a partial schematic diagram of the planar structure of the display substrate, illustrating the structures of the light-emitting element 520 and the grid 310 of the metal touch layer. For example, as shown in FIG. 6, the light-emitting element 520 of the display substrate is a rectangular light-emitting element, including a first light-emitting element 5201 and a second light-emitting element 5202 having different dimensions. The grid 310 of the touch metal layer 300 is a rectangular grid, including a first grid 3101 and a second grid 3102 having different dimensions. The first light-emitting element 5201 corresponds to the first grid 3101, and the second light-emitting element 5202 corresponds to the second grid 3102. For example, the area of ​​the first light-emitting element 5201 is larger than the area of ​​the second light-emitting element 5202, and therefore the area of ​​the first grid 3101 is also larger than the area of ​​the second grid 3102. This allows the light-transmitting area around each pixel to be as large as possible, thereby ensuring sensitivity in fingerprint detection.

[0062] For example, the display substrate includes a pixel driving circuit for driving the light-emitting element 520. The first metal signal lines 210 are power cords for the pixel driving circuit and are configured to provide power signals to the pixel driving circuit, such as high-voltage power signals (VDD signals), low-voltage power signals (VSS signals), or current power signals. The plurality of first metal signal lines 210 and the plurality of metal connecting signal lines 220 form a first grid pattern of the first metal signal line layer 200, which can ensure uniformity of voltage or current signals in a second direction X perpendicular to the first direction Y of the display substrate, thereby improving screen display quality.

[0063] 2A and 2B , the display substrate according to an embodiment of the present disclosure further includes a second metal signal line layer 400 located on a side of the first metal signal line layer 200 that is closer to the base substrate 100. A first planarization layer 570 is included between the second metal signal line layer 400 and the first metal signal line layer 200, and a plurality of vias 610 are formed in the first planarization layer 570. The second metal signal line layer 400 includes a plurality of second metal signal lines 410 extending along the first direction Y. The second metal signal lines 410 correspond one-to-one to the first metal signal lines 210 and overlap each other in a direction perpendicular to the base substrate, and each second metal signal line 410 is electrically connected to the corresponding first metal signal line 210 by the via 610. The second metal signal line 410 is also a power cord, such as a positive power cord (VDD power cord), of a pixel driving circuit, and is configured to provide a power signal to the light emitting element 520.

[0064] For example, the material of the second metal signal line layer 400 may include a metal material or an alloy material, and may be a single-layer metal or a multi-layer metal stack. For example, the first metal signal line layer 200 and the metal touch layer 300 may both be made of a three-layer metal stack of titanium, aluminum, and titanium (Ti / Al / Ti).

[0065] In the display substrate according to an embodiment of the present disclosure, the second metal signal lines are electrically connected to the first metal signal lines in a one-to-one correspondence. In this way, the first metal signal line 210 and the second metal signal line 410 are connected in parallel using a two-layer metal wiring scheme (e.g., a power supply positive electrode for a pixel driving circuit), which reduces resistance and ensures signal uniformity in the first direction Y of the display substrate, thereby improving screen display quality.

[0066] 2A illustrates a case in which the width of the second metal signal line 410 in the second direction X is smaller than the width of the first metal signal line 210 in the second direction X, but this is not limited thereto. For example, the width of the second metal signal line 410 in the second direction X may be equal to the width of the first metal signal line 210 in the second direction X, and in this case, the orthogonal projection of the second metal signal line 410 on the base substrate 100 essentially overlaps with the orthogonal projection of the first metal signal line 210 on the base substrate 100. For another example, the width of the second metal signal line 410 in the second direction X may be larger than the width of the first metal signal line 210 in the second direction X. For another example, the width of the second metal signal line 410 or the first metal signal line 210 in the second direction X may vary at different positions, and the width of the second metal signal line 410 may be larger than the width of the first metal signal line 210 at some positions, but may be smaller than the width of the first metal signal line 210 at other positions.

[0067] 2A and 3, the metal connection signal line 220 is a bent line and includes a first metal connection line segment 221 and a second metal connection line segment 222 that are connected to each other. The first metal connection line segment 221 extends along a second direction X that is perpendicular to the first direction Y, and the second metal connection line segment 222 extends along a direction that forms an acute or obtuse angle with respect to the first direction Y.

[0068] 2A , the second metal connection line segments 222 are parallel to the grid lines 320 of the metal touch layer 300 and overlap with the metal touch layer 300 in a direction perpendicular to the base substrate 100. Although FIG. 2A illustrates a case in which the width of the second metal connection line segments 222 is equal to the width of the grid lines 320 of the metal touch layer 300, this is not limiting. For example, the width of the second metal connection line segments 222 may be smaller than or larger than the width of the grid lines 320 of the metal touch layer 300. For example, the width of the second metal connection line segments 222 is equal to or smaller than the width of the grid lines 320 of the metal touch layer 300, and the orthogonal projection of the second metal connection line segments 222 on the base substrate 100 is located within the orthogonal projection of the metal touch layer 300 on the base substrate 100.

[0069] In the display substrate according to one embodiment of the present disclosure, the second metal connecting lines are parallel to and overlap the grid lines of the metal touch layer, which can reduce the area of ​​the transparent gaps of the display substrate that are blocked by the second metal connecting lines, thereby improving the sensitivity of fingerprint detection on the display of the display device using the display substrate and realizing fingerprint recognition on a large area of ​​the display.

[0070] 2A and 3, the length of the second metal connection line segment 222 is greater than or equal to the length of the first metal connection line segment 221. That is, the portion of the second metal connection line 220 overlapping with the metal touch layer is greater than the portion not overlapping with the metal touch layer, or the overlapping area between the second metal connection line segment 222 and the grid lines 320 of the metal touch layer in the direction perpendicular to the base substrate 100 is greater than 50% of the area of ​​the metal connection signal line 220. In this way, the second metal connection line serves to reduce the area blocking the light-transmitting gap of the display substrate, thereby improving the display fingerprint detection sensitivity of the display device using the display substrate and realizing large-area display fingerprint recognition.

[0071] For example, as shown in FIGS. 2A and 3, the metal connecting signal line 220 does not overlap the light emitting element 520, which helps to improve the pixel aperture ratio of the display substrate.

[0072] For example, Figure 2B further illustrates the structures of light-emitting elements 520 and switching elements 540. For example, as shown in Figure 2B, a display substrate according to one embodiment of the present disclosure further includes at least one switching element 540, where each light-emitting element 520 has a corresponding switching element 540 that controls the light-emitting element 520 to be turned on or off. Also, as will be described, a pixel circuit that controls each light-emitting element 520 may include multiple switching elements, and for simplicity, Figure 2B illustrates only one switching element.

[0073] 2B, the switching element 540 is a thin film transistor 540. The thin film transistor 540 includes an active layer 543 located on the base substrate 100, a gate electrode 544 located on the side of the active layer 543 away from the base substrate 100, and a source electrode and a drain electrode 541 located on the side of the gate electrode 544 away from the base substrate.

[0074] For example, as shown in Figure 2B, the display substrate according to the embodiment of the present disclosure further includes a connection electrode 580. The connection electrode is located between the thin film transistor and the light emitting element, and is electrically connected to the drain electrode of the thin film transistor and the light emitting element, respectively.

[0075] For example, the first metal signal line layer 200 is disposed in the same layer as the connection electrode 580, and the second metal signal line layer 400 is disposed in the same layer as the source electrode or drain electrode.

[0076] The light-emitting element 520 is located on the side of the thin film transistor 540 away from the base substrate 100. Each light-emitting element 520 further includes an anode 522, an electroluminescent layer 521, and a cathode 523 stacked along a direction perpendicular to the base substrate, with the electroluminescent layer 521 located between the anode 522 and the cathode 523, and capable of emitting light through the cooperation of the anode and the cathode. For example, the anodes 522 of each light-emitting element are insulated from each other. The cathodes 523 of each light-emitting element are connected to each other to form a continuous cathode layer. For example, the anode 522 may be a pixel electrode, allowing the brightness of each light-emitting element to be independently controlled for display.

[0077] 2B, the active layer of the thin film transistor 540 includes a source electrode region, a drain electrode region, and a channel region located between the source electrode region and the drain electrode region. The thin film transistor 540 includes a source electrode and a drain electrode 541, and the source electrode and the drain electrode are electrically connected to the source electrode region and the drain electrode region, respectively, by vias. The gate electrode overlaps the channel region located between the source electrode region and the drain electrode region in the active layer in a direction perpendicular to the base substrate 100.

[0078] 2A , the display substrate further includes a plurality of data lines 542 extending along a first direction Y. The data lines 542 are configured to provide data signals to the pixel driving circuits. For example, unlike the two-layer wiring structure in which the first metal signal line 210 and the second metal signal line 410 are connected in parallel, the data lines 542 use a single-layer metal wiring structure.

[0079] For example, the data line 542 is disposed in the same layer as the second metal signal line 410, and is parallel to and insulated from the second metal signal line 410. For example, the width of the data line 542 is smaller than the width of the second metal signal line 410.

[0080] For example, the material of the data line 542 and the source and drain electrodes 541 may include a metal material or an alloy material, and may be a single-layer metal or a multi-layer metal stack, such as a three-layer metal stack of titanium, aluminum, and titanium (Ti / Al / Ti). The data line 542 and the source and drain electrodes 541 may be disposed in the same layer as the second metal signal line 410 and manufactured using the same patterning process, thereby simplifying the manufacturing process of the display substrate and saving manufacturing costs.

[0081] 2B , the display substrate further includes a first planarization layer 570, which is located above the source and drain electrodes 541 and is used to planarize the surface of the thin film transistor facing away from the base substrate. A connection electrode 580 is formed on the first planarization layer 570, and the connection electrode 580 overlaps with the anode 522 in a direction perpendicular to the base substrate. The display substrate further includes a second planarization layer 590, which is located between the anode 522 and the connection electrode 580 and is used to planarize the surface of the connection electrode 580 facing away from the base substrate. The connection electrode 580 is electrically connected to the source and drain electrodes 541 by vias, and the anode 522 is electrically connected to the connection electrode 580 by vias, thereby achieving electrical connection between the anode 522 and the source and drain electrodes 541. The connection electrode can avoid forming vias with larger diameters that directly communicate with the first and second planarization layers, thereby improving the electrical connection quality of the vias.

[0082] For example, the connection electrode 580 is located in the first metal signal line layer 200, i.e., the connection electrode 580 is disposed in the same layer as the first metal signal line 210 and the metal connecting signal line 220. In this way, the connection electrode, the first metal signal line, and the metal connecting signal line can be manufactured using the same patterning process, thereby simplifying the manufacturing process of the display substrate and saving manufacturing costs.

[0083] 2B , the display substrate further includes a first buffer layer 110 located between the base substrate 100 and the active layer 543. The display substrate further includes a passivation layer 620 located between the first planarization layer 570 and the source and drain electrodes 541. The display substrate further includes a second buffer layer 740 located on the second inorganic package layer 730.

[0084] For example, the anode 522 may include a reflective layer, and the cathode 523 may include a transparent or semi-transparent layer. For example, the area of ​​the anode 522 may be larger than the area of ​​the electroluminescent layer 521 located in the opening 511, and the light-transmitting gap 530 between adjacent light-emitting elements 520 may also refer to the gap between adjacent anodes 522. This allows the anode 522 to reflect light emitted from the electroluminescent layer 521 in the light-emitting element 520, and this portion of the light passes through the cathode 523 and is emitted to the external environment, thereby improving the light output efficiency. At the same time, the anode 522 may include a reflective layer, which may further prevent the light-emitting element from emitting light downward and entering the fingerprint sensor together with the fingerprint reflection light, thereby interfering with fingerprint detection and affecting the sensitivity and accuracy of fingerprint detection.

[0085] In addition, the dimensions of the light-emitting element may refer to the dimensions of the anode of each light-emitting element. Generally, the dimensions of the anode are larger than the effective light-emitting area of ​​the light-emitting element, but the area around the anode of the light-emitting element is set up as a transparent gap, allowing light to pass through for fingerprint detection.

[0086] For example, the material of the anode 522 may include at least one transparent conductive oxide material, such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), etc. The anode 522 may also include a metal with high reflectivity, such as silver (Ag), as a reflective layer.

[0087] For example, for an OLED, the material of the electroluminescent layer 521 may include a small molecule organic material or a polymer molecule organic material, may be a fluorescent or phosphorescent light-emitting material, may emit red light, green light, blue light, or may emit white light, and if necessary, the electroluminescent layer may further include functional layers such as an electron injection layer, an electron transport layer, a hole injection layer, a hole transport layer, etc.

[0088] For example, the cathode 523 may include various conductive materials, such as lithium (Li), aluminum (Al), magnesium (Mg), silver (Ag), or other metallic materials.

[0089] For example, as shown in FIG. 2B , the display substrate further includes a package layer 700 covering the light-emitting element 520. The metal touch layer 300 is located on the side of the package layer 700 away from the base substrate 100. The package layer 700 seals the light-emitting element 520, thereby reducing or preventing deterioration of the light-emitting element 520 due to moisture or oxygen in the environment. The package layer 700 may have a single-layer structure or a multi-layer structure, where the multi-layer structure includes a stack of inorganic and organic layers. For example, as shown in FIG. 2B , the package layer 700 includes a first inorganic package layer 710, an organic package layer 720, and a second inorganic package layer 730, which are sequentially arranged.

[0090] For example, the material of the package layer may include insulating materials such as silicon nitride, silicon oxide, silicon oxynitride, polymer resin, etc. Inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride are highly dense and can prevent the intrusion of water, oxygen, etc. The material of the organic package layer may be a polymer material containing a desiccant or a polymer material that can block water vapor, such as a polymer resin, which can flatten the surface of the display substrate and relieve stress on the first inorganic package layer and the second inorganic package layer, and may further include a water-absorbing material such as a desiccant, which can absorb substances such as water and oxygen that have infiltrated inside.

[0091] 2B , the display substrate further includes a second buffer layer 740 located on the side of the second inorganic package layer 730 that faces away from the base substrate 100. For example, the display substrate further includes an insulating layer 750 located on the side of the second buffer layer 740 that faces away from the base substrate 100. For example, the insulating layer 750 may be a silicon nitride layer.

[0092] For example, the display substrate according to the embodiment of the present disclosure has a touch function, which is realized by a metal touch layer 300. The touch structure for realizing the touch function may be a self-capacitance type or a mutual capacitance type. The self-capacitance type touch structure includes a plurality of self-capacitance electrodes arranged in an array (located on the same layer), each electrically connected to a touch processing circuit (touch chip) by a touch conductor. When a touch is made, a change in the capacitance of the self-capacitance electrodes due to, for example, the approach of a finger is detected to realize position detection. The mutual capacitance type touch structure includes a plurality of first touch signal lines extending along a first direction and a plurality of second touch signal lines extending along a second direction, both of which are electrically connected to the touch processing circuit (touch chip) by touch conductors. The first direction and the second direction intersect each other to form an opening, thereby forming a touch capacitance at the intersection of the first touch signal line and the second touch signal line. When a touch is made, a change in the touch capacitance due to, for example, the approach of a finger is detected to realize position detection. The embodiment of the present disclosure will be described using a mutual capacitance type touch structure as an example.

[0093] The metal touch layer 300 includes a stacked touch electrode bridge layer, a touch electrode insulating layer, and a touch electrode layer. The touch electrode layer includes a plurality of driving electrodes and a plurality of sensing electrodes that are insulated from each other. A second grid pattern of the metal touch layer is located on the touch electrode layer, and a plurality of metal grids in the second grid pattern form one driving electrode or one sensing electrode, and the plurality of driving electrodes are connected to form a driving electrode line, and the plurality of sensing electrodes are connected to form a sensing electrode line. The touch electrode insulating layer is located between the touch electrode bridge layer and the touch electrode layer, and includes a plurality of vias. The multiple vias electrically connect the touch electrode bridge layer and the touch electrode layer, thereby serving as driving electrodes or sensing electrodes of the bridge touch electrode layer.

[0094] 2B, the metal touch layer 300 is located on the package layer 700. Forming the touch structure directly on the package layer, such as fabricating a metal touch grid directly on the second inorganic package layer 730, can help improve the integration density of the display substrate, thereby reducing the thickness of the display substrate and improving the folding performance of the display substrate.

[0095] For example, as shown in Figure 2B, the display substrate further includes a cover plate 800. The cover plate 800 is a substrate or film layer made of, for example, glass or plastic, and is used to provide support and protection for the display substrate and may also be used to allow users to perform touch operations.

[0096] An embodiment of the present disclosure provides a display device including the display substrate 10 according to any one of the above embodiments.

[0097] FIG. 7 is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure. In some examples, as shown in FIG. 7, the display device further includes a fingerprint sensor 20 located on the side of the base substrate 100 away from the first metal signal line layer 200 and configured to detect a fingerprint 30 on the display substrate 10. For example, the fingerprint sensor 20 is attached to the side of the base substrate 100 away from the first metal signal line layer 200 (i.e., the bottom side in the figure) using an optically transparent adhesive (OCA) and is used to detect reflected light 102 for fingerprint detection reflected from the surface of the cover plate 800. The fingerprint sensor 20 has a certain area and includes multiple regions corresponding to light-emitting elements. The fingerprint sensor 20 is coupled to a fingerprint detection processing device (e.g., an integrated circuit chip) by, for example, conductive wires, so that the collected fingerprint image can be transmitted to the fingerprint detection processing device in the form of a data signal. The fingerprint sensor 20 may be any suitable type of fingerprint sensor, such as a charge-coupled device (CCD) type or a complementary metal-oxide semiconductor (CMOS) type image sensor.

[0098] For example, the display device according to the embodiment of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, or a car navigation system.

[0099] The points that need to be explained are as follows:

[0100] First, the drawings of the embodiments of the present disclosure relate only to the structures related to the embodiments of the present disclosure, and other structures may refer to conventional designs.

[0101] (2) As long as there is no conflict, the embodiments and features of the embodiments of the present disclosure may be combined with each other to obtain new embodiments.

[0102] The above are specific embodiments of the present disclosure and are not intended to limit the scope of protection of the present disclosure. Any modifications or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be governed by the claims.

Claims

1. A display substrate, A base substrate; a first metal signal line layer located on the base substrate, the first metal signal line layer including a plurality of first metal signal lines extending along a first direction, the first metal signal line layer including a plurality of metal connection signal lines between every two adjacent first metal signal lines, the metal connection signal lines connecting the adjacent first metal signal lines; a metal touch layer located on a side of the first metal signal line layer away from the base substrate, the metal touch layer including a plurality of intersecting grid lines, the plurality of grid lines being arranged in an array to form a plurality of grids; a display substrate, wherein at least a portion of the metal connection signal line is parallel to a grid line of the metal touch layer, and in a direction perpendicular to the base substrate, the portion of the metal connection signal line parallel to the grid line of the metal touch layer at least partially overlaps the grid line of the metal touch layer.

2. 2. The display substrate of claim 1, wherein the metal connection signal line is a bent line and includes a first metal connection line segment and a second metal connection line segment that are connected to each other.

3. The display substrate of claim 2 , wherein the first metal connection lines extend along a second direction perpendicular to the first direction, and the second metal connection lines extend along a direction that forms an acute or obtuse angle with the first direction.

4. 4. The display substrate according to claim 2, wherein the second metal connection lines are parallel to the grid lines of the metal touch layer, and overlap the grid lines of the metal touch layer in a direction perpendicular to the base substrate.

5. 5. The display substrate of claim 4, wherein an overlap area between the second metal connection line segment and the grid line in a direction perpendicular to the base substrate is greater than 50% of an area of ​​the metal connection signal line.

6. 6. The display substrate of claim 2, wherein the first metal connection line segments at least partially overlap the grid lines located at corners of the grid in a direction perpendicular to the base substrate.

7. 7. The display substrate of claim 6, wherein an overlap area between the first metal connection line segment and the grid line located at a corner of the grid is smaller than an overlap area between the second metal connection line segment and the grid line of the metal touch layer.

8. 8. The display substrate of claim 4, wherein the grid lines include a plurality of breakpoints, and the second metal connection line segments overlap at least some of the breakpoints in a direction perpendicular to the base substrate.

9. 9. The display substrate of claim 2, wherein the second metal connecting line segments have a length greater than that of the first metal connecting line segments.

10. 10. The display substrate according to claim 1, comprising: a plurality of light-emitting elements arranged in an array, wherein a transparent gap is formed between adjacent light-emitting elements; in a direction perpendicular to the base substrate, the light-emitting elements are located between the metal touch layer and the first metal signal line layer; the grids correspond one-to-one to the light-emitting elements; the orthogonal projection of each light-emitting element on the base substrate is located within the orthogonal projection of the corresponding grid on the base substrate; and the area of ​​the orthogonal projection of the light-emitting element on the base substrate is smaller than the area of ​​the orthogonal projection of the corresponding grid on the base substrate.

11. the light emitting elements include red light emitting elements, green light emitting elements, and blue light emitting elements, and in a direction perpendicular to the base substrate, a middle portion of the first metal connecting line segment corresponding to the green light emitting element does not overlap with the grid line, and both ends of the first metal connecting line segment corresponding to the green light emitting element overlap with the grid line; the first metal connection line segments corresponding to the red light emitting elements completely overlap the grid lines; 11. The display substrate of claim 10, wherein a middle portion of the first metal connecting line corresponding to the blue light emitting element does not overlap with the grid line, and both ends of the first metal connecting line corresponding to the blue light emitting element overlap with the grid line.

12. A display substrate according to any one of claims 1 to 11, further comprising a second metal signal line layer located on the side of the first metal signal line layer closest to the base substrate, the second metal signal line layer including a plurality of second metal signal lines extending along the first direction, and the plurality of second metal signal lines being electrically connected to the plurality of first metal signal lines.

13. The display substrate of claim 10 , wherein the metal connection signal lines do not overlap the light emitting elements in a direction perpendicular to the base substrate.

14. 12. The display substrate according to claim 10, further comprising a pixel limiting layer, the pixel limiting layer including a plurality of openings arranged in an array, the openings corresponding one-to-one to the light-emitting elements, and the openings in the pixel limiting layer limit an effective light-emitting area of ​​the light-emitting elements.

15. The display substrate according to claim 10 or 11, further comprising a package layer covering the light emitting element, the metal touch layer being located on a side of the package layer away from the base substrate.

16. The display substrate according to any one of claims 2 to 15, further comprising a data line, the data line being in the same layer as the second metal signal line layer, parallel to the second metal signal line and insulated from the second metal signal line.

17. 17. The display substrate according to claim 1, wherein the metal touch layer includes a touch electrode bridge layer, an insulating layer, and a touch electrode layer, which are stacked together, the insulating layer being located between the touch electrode bridge layer and the touch electrode layer, and the insulating layer including a via connecting the touch electrode bridge layer and the touch electrode layer.

18. 18. The display substrate according to claim 1, wherein the first metal signal line is a positive power cord.

19. The light-emitting element further includes at least one thin film transistor and a connection electrode located between the base substrate and the light-emitting element; the at least one thin film transistor includes an active layer located on the base substrate, a gate electrode located on a side of the active layer away from the base substrate, and a source electrode and a drain electrode located on a side of the gate electrode away from the base substrate, the connecting electrode is located between the at least one thin film transistor and the light emitting element, and is electrically connected to the drain electrode of the at least one thin film transistor and the light emitting element; The display substrate of claim 12 , wherein the first metal signal line layer is disposed on the same layer as the connection electrode, and the second metal signal line layer is disposed on the same layer as the source electrode.

20. 20. The display substrate according to claim 1, wherein the base substrate is a flexible base substrate.

21. A display device comprising the display substrate according to any one of claims 1 to 20.

22. 22. The display device of claim 21, further comprising a fingerprint sensor located on a side of the base substrate away from the first metal signal line layer and configured to detect a fingerprint on the display substrate.

Images