Electroluminescent display substrate and display device

Abstract

An electroluminescent display substrate and a display device are provided. The display substrate comprises: a base substrate; a display light-emitting element disposed on the base substrate, the display light-emitting element comprising a light-emitting layer for emitting light; a packaging structure disposed on the base substrate and covering the display light-emitting element; a light-shielding structure disposed on a side of the packaging structure away from the base substrate; and an opening, the opening at least passing through the packaging structure. The light-shielding structure comprises a first light-shielding portion and a second light-shielding portion extending continuously, the vertical distance between the first light-shielding portion and the base substrate being greater than the vertical distance between the light-emitting layer of the display light-emitting element and the base substrate, and the vertical distance between the second light-shielding portion and the base substrate being less than the vertical distance between the light-emitting layer of the display light-emitting element and the base substrate.

Description

[0001] This application is a divisional application of the Chinese invention patent application with application number 201911009276.5 (application date: October 22, 2019; invention name: electroluminescent display substrate and display device). Technical Field

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

[0003] With the advancement of technology, special-shaped screens and full-screen displays have gradually come into everyone's view in recent years. Whether it is a special-shaped screen or a full-screen display, the purpose is to increase the screen-to-body ratio of the display device. So, in order to achieve a higher screen-to-body ratio, some openings (such as openings) need to be reserved for some additional components (such as cameras, sensors, etc.) at some positions of the display screen. In an electroluminescent display device such as an OLED display device, the light emitted by the light-emitting device will be transmitted to the edge of the opening, causing the human eye to observe light leakage at the edge of the opening. Summary of the invention

[0004] In one aspect, an electroluminescent display substrate is provided, comprising:

[0005] substrate substrate;

[0006] A display light-emitting element disposed on the base substrate, wherein the display light-emitting element comprises a light-emitting layer for emitting light;

[0007] A packaging structure disposed on the base substrate and covering the display light-emitting element;

[0008] A light shielding structure disposed on a side of the packaging structure away from the substrate; and

[0009] an opening, wherein the opening at least penetrates the packaging structure,

[0010] The orthographic projection of the light shielding structure on the base substrate is located between the orthographic projection of the light emitting layer of the display light emitting element on the base substrate and the orthographic projection of the opening on the base substrate.

[0011] The light-shielding structure includes a first light-shielding portion and a second light-shielding portion extending continuously, the substrate includes a first surface close to the display light-emitting element and the light-shielding structure, a vertical distance between the first light-shielding portion and the first surface of the substrate substrate is greater than a vertical distance between a light-emitting layer of the display light-emitting element and the first surface of the substrate substrate, and a vertical distance between the second light-shielding portion and the first surface of the substrate substrate is less than a vertical distance between the light-emitting layer of the display light-emitting element and the first surface of the substrate substrate.

[0012] For example, the light-emitting layer of the display light-emitting element includes a first surface close to the base substrate, and the vertical distance between the second light-shielding portion and the first surface of the base substrate is smaller than the vertical distance between the first surface of the light-emitting layer and the first surface of the base substrate.

[0013] For example, the electroluminescent display substrate further comprises a touch structure disposed on a side of the packaging structure away from the base substrate, wherein the touch structure comprises: a first touch layer disposed on a side of the packaging structure away from the base substrate; and a second touch layer disposed on a side of the first touch layer away from the base substrate.

[0014] The first touch layer includes a first touch structure close to the opening, and the first touch structure constitutes the light shielding structure.

[0015] For example, the electroluminescent display substrate also includes a touch structure arranged on a side of the packaging structure away from the base substrate, wherein the touch structure includes: a first touch layer arranged on a side of the packaging structure away from the base substrate; and a second touch layer arranged on a side of the first touch layer away from the base substrate, the second touch layer includes a second touch structure near the opening, and the second touch structure constitutes the shading structure.

[0016] For example, the first touch layer includes a plurality of first touch wires disposed in the same layer, and the first touch structure is a first touch wire among the plurality of first touch wires that is close to the opening.

[0017] For example, the first touch layer includes a plurality of first touch wires disposed in the same layer, and the first touch structure is a dummy touch wire disposed in the same layer as the plurality of first touch wires and close to the opening.

[0018] For example, the second touch layer includes a plurality of second touch wires disposed in the same layer, and the second touch structure is a second touch wire among the plurality of second touch wires that is close to the opening.

[0019] For example, the second touch layer includes a plurality of second touch wires disposed in the same layer, and the second touch structure is a dummy touch wire disposed in the same layer as the plurality of second touch wires and close to the opening.

[0020] For example, the touch control structure further includes a touch control insulating layer disposed on a side of the first touch control layer away from the base substrate, and the touch control insulating layer covers the first touch control structure.

[0021] For example, the touch control structure further includes a touch control covering layer disposed on a side of the second touch control layer away from the base substrate, and the touch control covering layer covers the second touch control structure.

[0022] For example, the packaging structure includes:

[0023] A first inorganic encapsulation layer disposed on a side of the display light-emitting element away from the base substrate;

[0024] an organic encapsulation layer disposed on a side of the first inorganic encapsulation layer away from the base substrate; and

[0025] A second inorganic encapsulation layer is disposed on a side of the organic encapsulation layer away from the base substrate,

[0026] The orthographic projection area of ​​the organic encapsulation layer on the base substrate is smaller than the orthographic projection area of ​​each of the first inorganic encapsulation layer and the second inorganic encapsulation layer on the base substrate.

[0027] The orthographic projection of the first light shielding portion on the base substrate overlaps with the orthographic projection of the organic encapsulation layer on the base substrate, and the orthographic projection of the second light shielding portion on the base substrate does not overlap with the orthographic projection of the organic encapsulation layer on the base substrate.

[0028] For example, the electroluminescent display substrate further includes: an isolation structure disposed on the base substrate, wherein the orthographic projection of the isolation structure on the base substrate is located between the orthographic projection of the light-emitting layer of the display light-emitting element on the base substrate and the orthographic projection of the opening on the base substrate,

[0029] The orthographic projection of the light shielding structure on the base substrate overlaps with the orthographic projection of the isolation structure on the base substrate.

[0030] For example, the electroluminescent display substrate further includes: a barrier layer disposed between the packaging structure and the touch control structure, wherein the light shielding structure is located on a surface of the barrier layer away from the base substrate.

[0031] In another aspect, a display device is provided, comprising the electroluminescent display substrate mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present disclosure, the drawings of the embodiments will be briefly described below. It should be noted that the drawings described below only relate to some exemplary embodiments of the present disclosure, rather than limiting the present disclosure, wherein:

[0033] Figure 1 is a schematic cross-sectional view of an electroluminescent display substrate around an opening in the related art;

[0034] Figure 2 is a plan view of an electroluminescent display substrate according to an exemplary embodiment of the present disclosure;

[0035] Figure 3 The electroluminescent display substrate according to the exemplary embodiment of the present disclosure is Figure 2 A schematic cross-sectional view taken along line AA' in FIG.

[0036] Figure 4 is a plan view of an electroluminescent display substrate according to an exemplary embodiment of the present disclosure, wherein a touch control structure included in the electroluminescent display substrate according to an exemplary embodiment of the present disclosure is schematically shown;

[0037] Figure 5 The electroluminescent display substrate according to the exemplary embodiment of the present disclosure is Figure 4 A schematic cross-sectional view taken along line BB' in FIG.

[0038] Figure 6 The electroluminescent display substrate according to the exemplary embodiment of the present disclosure is Figure 4 A schematic cross-sectional view taken along line BB' in FIG.

[0039] Figure 7 is a flow chart of a method for preparing an electroluminescent display substrate according to an embodiment of the present disclosure; and

[0040] Figure 8 is a schematic diagram of a display device according to an embodiment of the present disclosure.

[0041] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of layers, structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0042] The technical solution of the present disclosure is further specifically described below through examples and in conjunction with the accompanying drawings. In the specification, the same or similar figure numbers indicate the same or similar parts. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the overall inventive concept of the present disclosure and should not be construed as a limitation of the present disclosure.

[0043] In addition, in the following detailed description, for the purpose of explanation, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details.

[0044] It should be noted that the terms “on…”, “formed on…” and “disposed on…” mentioned herein may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0045] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present disclosure.

[0046] In this document, unless otherwise specified, expressions such as “located on the same layer”, “arranged on the same layer”, etc. mean that two layers, parts, components, structures, elements or parts can be formed by the same composition process, and that the two layers, parts, components, elements or parts are generally formed of the same material.

[0047] Herein, unless otherwise specified, the expression "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, photoresist stripping, etc. The expression "one-time patterning process" means a process of forming patterned layers, components, members, etc. using one mask.

[0048] In this document, unless otherwise specified, the term "pseudo touch routing" refers to a routing that is electrically connected to a touch electrode and is used to transmit a touch signal; the term "pseudo touch routing" refers to a routing that is arranged on the same layer as a touch routing used to transmit a touch signal but is not used to transmit an actual touch signal.

[0049] Herein, unless otherwise specified, the expression “extending continuously” means that two parts extend continuously and without interruption, that is, the two parts form an integral structure.

[0050] Figure 1 FIG. 1 is a schematic cross-sectional view of an electroluminescent display substrate around an opening in the related art. Figure 1As shown, the display substrate may include: a base substrate 1, and a thin film transistor (TFT) 2, a display light emitting element 3, a packaging structure 4, and a light shielding structure 5 sequentially arranged on the base substrate 1. For example, the opening 7 may penetrate the base substrate and each film layer on the display substrate in a direction perpendicular to the base substrate 1. The display substrate may also include an isolation column 6 located between the opening 7 and the display light emitting element 3 to prevent water vapor and oxygen from passing through the side of the opening 7 (for example, Figure 1 The side HS indicated in the figure intrudes into the display light-emitting element.

[0051] For example, the display light emitting element 3 may include an OLED device, that is, may include an anode, a cathode, and an organic light emitting layer sandwiched between the anode and the cathode.

[0052] For example, the light shielding structure 5 may be made of a light-proof metal material.

[0053] The light emitted by the organic light-emitting layer of the display light-emitting element 3 will be emitted from the opening 7, resulting in the phenomenon of light leakage at the edge of the opening being observed by the human eye. In order to alleviate this light leakage phenomenon, the method generally adopted in the related art is to expand the coverage area of ​​the light-shielding structure 5, such as Figure 1 As shown, the width of the light shielding structure is increased so that the light shielding structure extends toward the side HS of the opening 7. In this way, a portion of the light emitted from the organic light emitting layer and emitted toward the opening 7 (for example Figure 1 The light L1) in the aperture 7 is blocked by the light shielding structure 5 to prevent it from being emitted from the aperture 7. Figure 1 As shown, a portion of the light emitted from the organic light emitting layer and emitted toward the opening 7 (eg Figure 1 The light rays L2, L3) in the image are not blocked by the light shielding structure 5, and they can still be emitted from the opening 7, so that the human eye can still observe the phenomenon of light leakage at the edge of the opening.

[0054] Figure 2 is a plan view of an electroluminescent display substrate according to an exemplary embodiment of the present disclosure, Figure 3 The electroluminescent display substrate according to the exemplary embodiment of the present disclosure is Figure 2 A schematic cross-sectional view taken along the line A-A' in FIG. Figure 2 As shown, the electroluminescent display substrate includes a display area AA and at least one opening 70 located in the display area AA. Figure 2 In the figure, two openings 70 are provided as an example for illustration, but it should be understood that the embodiments of the present disclosure are not limited thereto, and in other embodiments, fewer (for example, one) or more openings 70 may be provided.

[0055] It should be noted that the "opening" described in this article is an area on the display substrate used to install the hardware structure. For the convenience of explanation, it is referred to as an opening in this article, but the opening includes but is not limited to the following forms: through hole, groove, opening, etc. Optionally, the hardware structure may include one or more of the following structures: a front camera, a HOME button, an earpiece or a speaker. The specific installation method of the hardware structure is not particularly limited in the embodiment of the present disclosure. In addition, the shape of the opening can be determined according to the shape of the hardware structure to be installed. For example, the cross-section of the opening in the direction parallel to the base substrate of the display substrate can have one or more of the following shapes: circular, elliptical, rectangular, rounded rectangle, square, diamond, trapezoid, etc.

[0056] like Figure 3 As shown, an electroluminescent display substrate such as an OLED display substrate may include: a base substrate 10, and a thin film transistor (TFT for short) 20, a display light-emitting element 30, a packaging structure 40, and a light-shielding structure 50 sequentially arranged on the base substrate 10. For example, the opening 70 may penetrate the various film layers on the base substrate and the display substrate in a direction perpendicular to the base substrate 10. Of course, the embodiments of the present disclosure are not limited to this. The opening may also be set as required to penetrate other film layers except the base substrate only in the thickness direction of the base substrate. The specific portion through which the opening penetrates may be set as required and is not specifically limited herein. In addition, the electroluminescent display substrate may also include film layers such as an insulating layer 21, a pixel defining layer 22, a conductive layer 23, and an insulating layer 24. These film layers may refer to the film layers in the relevant technology and will not be described in detail herein.

[0057] Continue to refer to Figure 3 The display substrate may further include an isolation structure 60 between the opening 70 and the display light emitting element 30 to prevent water vapor and oxygen from passing through the side of the opening 70 (eg Figure 3 The side HS indicated in the figure intrudes into the display light emitting element. Figure 2 In the plan view, the opening includes a closed annular shape, and the isolation structure 60 is arranged around the opening 70, so the isolation structure 60 also includes a closed annular shape. In addition, from the plan view, the shape of the isolation structure 60 is consistent with the shape of the opening 70. For example, Figure 2 The opening 70 at the lower middle part is circular, and the corresponding isolation structure 60 is also circular. The opening 70 at the upper part is rectangular, and the corresponding isolation structure 60 is also rectangular.

[0058] For example, the display light emitting element 30 may include an OLED device, that is, it may include an anode 31, a cathode 33, and an organic light emitting layer 32 sandwiched between the anode and the cathode. For example, the conductive layer 23 may be electrically connected to the source or drain of the thin film transistor 20 through a via 211 formed in the insulating layer 21, and the anode 31 may be electrically connected to the conductive layer 23 through a via 241 formed in the insulating layer 24, thereby achieving electrical connection with the source or drain of the thin film transistor 20.

[0059] For example, the encapsulation structure 40 may include a film layer formed by alternating inorganic layers and organic layers. For example, the encapsulation structure 40 may include a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43 arranged in sequence. The organic encapsulation layer 42 is located between the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43. The first inorganic encapsulation layer 41, the organic encapsulation layer 42, and the second inorganic encapsulation layer 43 all cover the display light-emitting element 30 to protect the display light-emitting element 30 from corrosion by water vapor and oxygen. Specifically, as Figure 3 As shown, the first inorganic encapsulation layer 41 is formed on the side of the display light-emitting element 30 away from the base substrate 10, the organic encapsulation layer 42 is formed on the side of the first inorganic encapsulation layer 41 away from the base substrate 10, and the second inorganic encapsulation layer 43 is formed on the side of the organic encapsulation layer 42 away from the base substrate 10.

[0060] like Figure 3 As shown, the isolation structure 60 may include a first isolation column 61 and a second isolation column 62, that is, more than two isolation columns are arranged on one side of the opening 70 to better prevent water vapor and oxygen from invading the display light-emitting element through the side of the opening 70. For example, the first isolation column 61 and the second isolation column 62 are both arranged between the opening 70 and the display light-emitting element 30, and the first isolation column 61 is closer to the opening 70 than the second isolation column 62.

[0061] For example, Figure 3 As shown, the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 not only cover the display light-emitting element 30, but also cover the first isolation column 61 and the second isolation column 62, and the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 extend to the side HS of the opening 70. The organic encapsulation layer 42 covers the display light-emitting element 30, but it does not cover the first isolation column 61 and the second isolation column 62, that is, the organic encapsulation layer 42 extends to the inner side of the second isolation column 62 (that is, the side of the second isolation column 62 away from the hole 70). Through such a setting, water vapor and oxygen can be prevented from invading the display light-emitting element through the side of the opening 70.

[0062] For example, the orthographic projection area of ​​the organic encapsulation layer 43 on the base substrate 10 is smaller than the orthographic projection area of ​​each of the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 on the base substrate 10. Figure 3 As shown, the thickness of the organic encapsulation layer 42 may decrease as it extends in the direction toward the opening 70, so that the height of the upper surface of the organic encapsulation layer 42 gradually decreases in the direction toward the opening 70. In a specific implementation, when the organic encapsulation layer 42 is formed, the amount of the organic material layer is increased so that an organic encapsulation layer 42 with sufficient thickness can be formed on the edge of the display area. However, in this case, the amount of the organic material backflow increases. Then, the organic encapsulation layer 42 may be formed all the way to the outside of the first isolation column 61 and the second isolation column 62, and therefore, the probability of the organic encapsulation layer 42 being exposed on the side HS of the opening 70 increases. As a result, water vapor and oxygen may penetrate through the exposed organic encapsulation layer 42 and invade the display light-emitting element, thereby possibly reducing the reliability of the display device. Therefore, in order not to extend the organic encapsulation layer 42 all the way to the outside of the first isolation column 61 and the second isolation column 62, the thickness of the organic encapsulation layer 42 may be reduced on the edge of the display area without increasing the amount of the organic material layer. Therefore, above the display light-emitting element 30, the thickness of the upper surface of the organic encapsulation layer 42 is relatively large to better cover the display light-emitting element 30; in the transition area between the display light-emitting element 30 and the isolation structure 60, the height of the upper surface of the organic encapsulation layer 42 gradually decreases, and the organic encapsulation layer 42 is not provided on the outer side of the second isolation column 62 to avoid the organic encapsulation layer 42 being exposed on the side HS of the opening 70.

[0063] like Figure 3 As shown, the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 extend to the side HS of the opening 70, and the organic encapsulation layer 42 extends to the inner side of the second isolation column 62. In this way, there is a height difference between the encapsulation structure 40 and the isolation structure 60. Specifically, there is a height difference between the surface of the second inorganic encapsulation layer 43 away from the base substrate 10 and the isolation structure 60.

[0064] Continue to refer to Figure 3, the orthographic projection of the light-shielding structure 50 on the substrate substrate 10 is located between the orthographic projection of the organic light-emitting layer 32 of the display light-emitting element 30 on the substrate substrate 10 and the orthographic projection of the opening 70 on the substrate substrate 10. The light-shielding structure 50 is disposed on the encapsulation structure 40, that is, located on the surface of the encapsulation structure 40 away from the substrate substrate 10. Specifically, the light-shielding structure 50 can be disposed on the surface of the second inorganic encapsulation layer 43 away from the substrate substrate 10. There is a height difference between the surface of the second inorganic encapsulation layer 43 away from the substrate substrate 10 and the isolation structure 60, so that when the light-shielding structure 50 extends on the surface of the second inorganic encapsulation layer 43 away from the substrate substrate 10, it can extend from a position higher than the display light-emitting element 30 to a position lower than the display light-emitting element 30. The light-emitting layer 32 of the display light-emitting element 30 includes a first surface close to the substrate substrate 10 (that is, the lower surface in the figure) and a second surface away from the substrate substrate 10 (that is, the upper surface in the figure), as shown in FIG. Figure 3 As shown, the dotted line HL indicates the height position of the first surface of the light emitting layer 32, and the dotted line HH indicates the height position of the second surface of the light emitting layer 32. Figure 3 In the illustrated embodiment, when the light-shielding structure 50 extends on the surface of the second inorganic encapsulation layer 43 away from the base substrate 10, it extends from a position higher than the light-emitting layer 32 to a position lower than the light-emitting layer 32. More specifically, a portion of the light-shielding structure 50 is located above the dotted line HH, and another portion of the light-shielding structure 50 is located below the dotted line HH.

[0065] like Figure 3 As shown, the light shielding structure 50 may include a first light shielding portion 51 and a second light shielding portion 52 that extend continuously. The orthographic projection of the first light shielding portion 51 on the substrate substrate 10 overlaps with the orthographic projection of the organic encapsulation layer 42 on the substrate substrate 10. The orthographic projection of the second light shielding portion 52 on the substrate substrate 10 does not overlap with the orthographic projection of the organic encapsulation layer 42 on the substrate substrate 10, and the orthographic projection of the second light shielding portion 52 on the substrate substrate 10 falls within the orthographic projection of each of the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 on the substrate substrate 10, and the orthographic projection of the second light shielding portion 52 on the substrate substrate 10 is located between the orthographic projection of the organic encapsulation layer 42 on the substrate substrate 10 and the orthographic projection of the opening 70 on the substrate substrate 10. In this way, as Figure 3As shown, the first light shielding portion 51 is located at a position higher than the organic light emitting layer 32 of the display light emitting element 30, and the second light shielding portion 52 is located at a position lower than the organic light emitting layer 32 of the display light emitting element 30, and even at a position lower than the first surface of the organic light emitting layer 32. In other words, the vertical distance between the first light shielding portion 51 and the base substrate 10 is greater than the vertical distance between the display light emitting element 30 and the base substrate 10, and the vertical distance between the second light shielding portion 52 and the base substrate 10 is less than the vertical distance between the display light emitting element 30 and the base substrate 10. More specifically, the vertical distance between the first light shading portion 51 and the upper surface of the substrate 10 is greater than the vertical distance between the organic light emitting layer 32 of the display light emitting element 30 and the upper surface of the substrate 10, and the vertical distance between the second light shading portion 52 and the upper surface of the substrate 10 is smaller than the vertical distance between the organic light emitting layer 32 of the display light emitting element 30 and the upper surface of the substrate 10. In fact, the vertical distance between the second light shading portion 52 and the upper surface of the substrate 10 is smaller than the vertical distance between the first surface (i.e., the lower surface) of the organic light emitting layer 32 and the upper surface of the substrate 10.

[0066] By setting it up like this, Figure 3 As shown, the light (eg, Figure 3 The light beams L1, L2, L3) in the light source will be blocked by the light shielding structure 50 (including the first light shielding portion 51 and the second light shielding portion 52) to prevent them from being emitted from the opening 70. In particular, for example Figure 3 The light L2 and L3 in the organic light emitting layer can be shielded by the second light shielding portion 52 which is lower than the organic light emitting layer 32, and these light rays are prevented from being emitted from the opening 70. In this way, the light leakage phenomenon at the edge of the opening can be significantly reduced or even avoided.

[0067] Figure 4 is a plan view of an electroluminescent display substrate according to an exemplary embodiment of the present disclosure, which schematically shows a touch control structure included in the electroluminescent display substrate according to an exemplary embodiment of the present disclosure, Figure 5 The electroluminescent display substrate according to the exemplary embodiment of the present disclosure is Figure 4 A schematic cross-sectional view taken along line BB' in FIG.

[0068] Reference Figure 4, the touch structure 150 may include a plurality of touch electrodes 80 and a plurality of touch traces 90 electrically connected to the plurality of touch electrodes 80. Exemplarily, the touch electrode 80 may include a first touch electrode 81 and a second touch electrode 82. The first touch electrode 81 and the second touch electrode 82 may be alternately arranged so that they may not overlap each other in the display area. For example, the first touch electrode 81 and the second touch electrode 82 may be arranged on different layers. Of course, in other embodiments, the first touch electrode 81 and the second touch electrode 82 may be arranged on the same layer. For example, the first touch electrode 81 may be one of the touch drive electrode and the touch sensing electrode, and the second touch electrode 82 may be the other of the touch drive electrode and the touch sensing electrode.

[0069] Continue to refer to Figure 4 , the touch trace 90 may include a first touch trace 91 and a second touch trace 92. The first touch electrode 81 may be electrically connected to the first touch trace 91, and the second touch electrode 82 may be electrically connected to the second touch trace 92. For example, the first touch trace 91 and the first touch electrode 81 may be disposed on the same layer, and the second touch trace 92 and the second touch electrode 82 may be disposed on the same layer, but the embodiments of the present disclosure are not limited thereto.

[0070] For example, the first touch electrode 81 and the second touch electrode 82 may have a certain transmittance so that light emitted from the organic light emitting layer 32 can be transmitted through the first touch electrode 81 and the second touch electrode 82. For example, the first touch electrode 81 and the second touch electrode 82 may be made of a thin metal layer such as indium tin oxide (ITO), indium zinc oxide (IZO), or silver nanowires, or a transparent conductive material such as a metal mesh or a carbon nanotube, but the embodiments of the present disclosure are not limited thereto.

[0071] For example, the first touch wiring 91 and the second touch wiring 92 may be made of a material such as molybdenum (M o ), silver (Ag), titanium (Ti), copper (Cu), and aluminum (Al), that is, they are made of opaque conductive metal materials.

[0072] Reference Figure 5 The electroluminescent display substrate may include a base substrate 10, a thin film transistor 20 disposed on the base substrate 10, a first insulating layer 110, a conductive layer 120, a second insulating layer 130, a display light-emitting element 30, a packaging structure 40, a touch control structure 150 and an isolation structure 60.

[0073] For example, the first insulating layer 110 may be at least one layer selected from an interlayer insulating layer, a gate insulating layer, a buffer layer, and a barrier layer. Specifically, the first insulating layer 110 may be a single layer or multilayer structure including silicon oxide or silicon nitride.

[0074] The thin film transistor 20 is disposed on the base substrate 10 , and may include an active layer, a gate, a source electrode, and a drain electrode. The specific structure thereof may refer to the structure of an existing thin film transistor, and will not be described in detail herein.

[0075] The conductive layer 120 is disposed on a side of the first insulating layer 110 away from the base substrate 10. For example, it can be electrically connected to the source or drain of the thin film transistor 20. Figure 5 As shown, a via 1101 is formed in the first insulating layer 110, and the conductive layer 120 can be electrically connected to the source or drain of the thin film transistor 20 through the via. For another example, the source or drain of the thin film transistor 20 can constitute the conductive layer 120. The embodiments of the present disclosure are not particularly limited to this.

[0076] The second insulating layer 130 is disposed on the side of the conductive layer 120 away from the base substrate 10. The second insulating layer 130 may also be a single layer or multi-layer structure including silicon oxide or silicon nitride. Figure 5 As shown, a via hole 1301 is formed in the second insulating layer 130 .

[0077] The display light emitting element 30 is disposed on a side of the second insulating layer 130 away from the base substrate 10, and may include a first electrode 31, a second electrode 33, and an organic light emitting layer 32 sandwiched between the first electrode and the second electrode. Figure 5 As shown, a via 1301 may be formed in the second insulating layer 130, and the anode 31 is electrically connected to the conductive layer 120 through the via 1301. For example, the first electrode may be one of the anode and the cathode, and the second electrode may be the other of the anode and the cathode. The first electrode 31 may be electrically connected to the conductive layer 120 through the via 1301, thereby achieving electrical connection with the source or drain of the thin film transistor 20.

[0078] The encapsulation structure 40 may include a film layer formed by alternating inorganic layers and organic layers. For example, the encapsulation structure 40 may include a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43. The encapsulation structure 40 may refer to the detailed description above and will not be repeated here.

[0079] The touch control structure 150 is disposed on a side of the package structure 40 away from the base substrate 10. Figure 5As shown, the electroluminescent display substrate may further include a barrier layer 160 disposed between the encapsulation structure 40 and the touch control structure 150. The barrier layer 160 is disposed on the surface of the second inorganic encapsulation layer 43 of the encapsulation structure 40 away from the base substrate 10, and the orthographic projection of the barrier layer 160 on the base substrate 10 covers the orthographic projection of the second inorganic encapsulation layer 43 on the base substrate 10. For example, the barrier layer 160 may include a polymer material. It should be understood that due to the height difference of the encapsulation structure 40, the barrier layer 160 disposed on the encapsulation structure 40 will also extend from a position higher than the display light-emitting element 30 to a position lower than the display light-emitting element 30.

[0080] Combination Figure 4 and Figure 5 The touch structure 150 may include a first touch layer 151, a touch insulating layer 153, a second touch layer 152 and a touch cover layer 154. The first touch layer 151 may include a plurality of first touch traces 91 disposed in the same layer, and the second touch layer 152 may include a plurality of second touch traces 92 disposed in the same layer.

[0081] Specifically, the first touch layer 151 is disposed on the surface of the barrier layer 160 away from the base substrate 10, the touch insulating layer 153 is disposed on the side of the first touch layer 151 away from the base substrate 10, the second touch layer 152 is disposed on the side of the touch insulating layer 153 away from the base substrate 10, and the touch cover layer 154 is disposed on the side of the second touch layer 152 away from the base substrate 10. The orthographic projection of the touch insulating layer 153 on the base substrate 10 covers the orthographic projection of the first touch layer 151 on the base substrate 10, for example, the touch insulating layer 153 may be a single-layer or multi-layer structure including silicon oxide or silicon nitride. The touch cover layer 154 covers both the first touch layer 151 and the second touch layer 152 to protect the touch wiring.

[0082] The inventor has found through research that when the touch line is directly formed on the inorganic packaging layer of the packaging structure, the bonding force between the touch line and the inorganic packaging layer is poor, and there is a risk that the touch line will fall off the inorganic packaging layer. By providing a barrier layer 160 between the packaging structure 40 and the touch structure 150, the touch line is formed on the barrier layer 160, which increases the bonding force between the two, thereby reducing the risk of the touch line falling off.

[0083] like Figure 5As shown, the orthographic projection of the isolation structure 60 on the base substrate 10 is located between the orthographic projection of the organic light-emitting layer 32 of the display light-emitting element 30 on the base substrate 10 and the orthographic projection of the opening 70 on the base substrate 10, and the orthographic projection of the light-shielding structure 50 on the base substrate 10 overlaps with the orthographic projection of the isolation structure 60 on the base substrate 10. For example, the isolation structure 60 may include at least one isolation column and at least one cofferdam structure. Figure 5 In the illustrated embodiment, two isolation columns 61, 62 and two cofferdam structures 63, 64 are exemplarily shown, however, the embodiments of the present disclosure are not limited thereto, and the isolation structure 60 may include a larger number of isolation columns and a larger number of cofferdam structures. For example, the material of the isolation column and the cofferdam structure may be photoresist, and the isolation column and the cofferdam structure may be obtained by a photolithography process. For another example, the material of the isolation column and the cofferdam structure may be inorganic materials such as silicon nitride and silicon oxide, and the isolation column and the cofferdam structure may be obtained by a dry etching process. In the actual manufacturing process, in order to save process, the isolation column and the cofferdam structure may be made with other film layers through the same patterning process, for example, the isolation column and the cofferdam structure may be composed of a single film layer, or may be composed of multiple film layers stacked. By providing the isolation column and the cofferdam structure, the path for water vapor and oxygen to invade the display light-emitting element is further extended, thereby improving the packaging reliability.

[0084] Continue to refer to Figure 5 , the light shielding structure 50 may include a first touch structure located in the first touch layer 151 and close to the opening 70. For example, the first touch layer 151 includes a plurality of first touch traces 91 arranged in the same layer, and the first touch structure is a first touch trace close to the opening 70 among the plurality of first touch traces 91. It should be noted that the first touch trace close to the opening 70 may transmit a touch signal, that is, the first touch trace close to the opening 70 is used for both transmitting a touch signal and shielding light.

[0085] Optionally, the first touch structure may be a dummy touch line disposed on the same layer as the plurality of first touch lines 91 and close to the opening 70. In other words, the first touch line close to the opening 70 may be a dummy touch line, i.e., no actual touch signal is transmitted thereon. In this case, the dummy touch line close to the opening 70 is disposed on the same layer as the first touch line 91 for transmitting the touch signal, so as to shield light.

[0086] That is, the light shielding structure 50 includes a first touch line arranged near the opening 70 or a dummy touch line arranged in the same layer as the first touch line 91. The width of the touch line used for the light shielding structure is greater than the width of the second touch line 92. That is, the width of the touch line used for the light shielding structure is set to be wide enough so that it extends from a position higher than the display light emitting element 30 to a position lower than the display light emitting element 30.

[0087] like Figure 5 As shown, the touch line used for the light shielding structure includes a first portion 911 and a second portion 912 extending continuously, the orthographic projection of the first portion 911 of the touch line on the base substrate 10 overlaps with the orthographic projection of the organic encapsulation layer 42 on the base substrate 10, the orthographic projection of the second portion 912 of the touch line on the base substrate 10 does not overlap with the orthographic projection of the organic encapsulation layer 42 on the base substrate 10, and the orthographic projection of the second portion 912 of the touch line on the base substrate 10 falls within the orthographic projection of each of the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 on the base substrate 10. In this way, the first portion 911 of the touch line is located at a position higher than the display light-emitting element 30, and the second portion 912 of the touch line is located at a position lower than the display light-emitting element 30. More specifically, the vertical distance between the first portion 911 of the touch trace and the upper surface of the base substrate 10 is greater than the vertical distance between the organic light-emitting layer 32 of the display light-emitting element 30 and the upper surface of the base substrate 10, and the vertical distance between the second portion 912 of the touch trace and the upper surface of the base substrate 10 is less than the vertical distance between the organic light-emitting layer 32 of the display light-emitting element 30 and the upper surface of the base substrate 10.

[0088] In this embodiment, the first portion 911 of the touch line disposed near the opening 70 constitutes the first light shielding portion 51, and the second portion 912 of the touch line disposed near the opening 70 constitutes the second light shielding portion 52, that is, the touch line disposed near the opening 70 can constitute the light shielding structure 50. By such a configuration, the light emitted from the organic light emitting layer 32 and emitted toward the opening 70 (for example Figure 5 The light beams L1, L2, and L3 in the image are blocked by the touch wiring arranged near the opening 70, so as to be prevented from being emitted from the opening 70. Specifically, for example Figure 5The light L2 and L3 in the organic light emitting layer 32 can be blocked by the second part 912 which is lower than the organic light emitting layer 32, and these light rays are prevented from being emitted from the opening 70. In this way, the light leakage phenomenon existing at the edge of the opening can be significantly reduced or even avoided. In addition, by setting a first touch line or a pseudo touch line close to the opening as the shading structure, the shading structure and the first touch line can be formed by the same composition process, so the number of composition processes will not be increased, and it is beneficial to save manufacturing costs. In addition, when the display substrate according to the embodiment of the present disclosure is assembled with a cover substrate such as a color film substrate, since the light emitted by the light emitting layer can be completely blocked from propagating in the opening by being arranged on the display substrate, it is not necessary to additionally set a shading element such as black ink on the cover substrate, which can simplify the manufacturing process of the cover substrate, reduce the manufacturing cost of the cover substrate, and do not require a high bonding accuracy when the display substrate and the cover substrate are assembled, which is beneficial to the entire manufacturing process.

[0089] Figure 6 The electroluminescent display substrate according to the exemplary embodiment of the present disclosure is Figure 4 The following is a schematic cross-sectional view of the line BB' in FIG. Figure 6 The embodiment shown is Figure 5 The difference between the embodiments shown is that Figure 6 Other structures in the embodiment shown can refer to the above Figure 5 Description of the illustrated embodiment.

[0090] Reference Figure 6 The touch insulating layer 153 is disposed on the side of the barrier layer 160 away from the base substrate 10 and covers the first touch layer 151. Due to the height difference of the package structure 40, the touch insulating layer 153 disposed on the package structure 40 also extends from a position higher than the display light emitting element 30 to a position lower than the display light emitting element 30.

[0091] Continue to refer to Figure 6 , the light shielding structure 50 may include a second touch structure located in the second touch layer 152 and close to the opening 70. For example, the second touch layer 152 includes a plurality of second touch traces 92 arranged in the same layer, and the first touch structure is a first touch trace close to the opening 70 among the plurality of second touch traces 92. It should be noted that the second touch trace close to the opening 70 may transmit a touch signal, that is, the second touch trace close to the opening 70 is used for both transmitting a touch signal and shielding light.

[0092] Optionally, the second touch structure may be a dummy touch line disposed on the same layer as the plurality of second touch lines 92 and close to the opening 70. In other words, the second touch line close to the opening 70 may be a dummy touch line, i.e., no actual touch signal is transmitted thereon. In this case, the dummy touch line close to the opening 70 is disposed on the same layer as the second touch line 92 for transmitting the touch signal, so as to shield light.

[0093] That is, the light shielding structure 50 includes a second touch line arranged near the opening 70 or a dummy touch line arranged in the same layer as the second touch line 92. The width of the second touch line used as the light shielding structure is greater than the width of the first touch line 91. That is, the width of the touch line used as the light shielding structure is set to be wide enough so that it extends from a position higher than the display light emitting element 30 to a position lower than the display light emitting element 30.

[0094] like Figure 6 As shown, the touch line used as the light shielding structure includes a first portion 921 and a second portion 922 extending continuously, the orthographic projection of the first portion 921 of the touch line on the substrate substrate 10 overlaps with the orthographic projection of the organic encapsulation layer 42 on the substrate substrate 10, the orthographic projection of the second portion 922 of the touch line on the substrate substrate 10 does not overlap with the orthographic projection of the organic encapsulation layer 42 on the substrate substrate 10, and the orthographic projection of the second portion 922 of the touch line on the substrate substrate 10 falls within the orthographic projection of each of the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 on the substrate substrate 10. In this way, the first portion 921 of the touch line is located at a position higher than the display light-emitting element 30, and the second portion 922 of the touch line is located at a position lower than the display light-emitting element 30. More specifically, the vertical distance between the first portion 921 of the touch trace and the upper surface of the base substrate 10 is greater than the vertical distance between the organic light-emitting layer 32 of the display light-emitting element 30 and the upper surface of the base substrate 10, and the vertical distance between the second portion 922 of the touch trace and the upper surface of the base substrate 10 is less than the vertical distance between the organic light-emitting layer 32 of the display light-emitting element 30 and the upper surface of the base substrate 10.

[0095] In this embodiment, the first portion 921 of the touch line disposed near the opening 70 constitutes the first light shielding portion 51, and the second portion 922 of the touch line disposed near the opening 70 constitutes the second light shielding portion 52, that is, the touch line disposed near the opening 70 can constitute the light shielding structure 50. By such a configuration, the light emitted from the organic light emitting layer 32 and emitted toward the opening 70 (for example Figure 6 The light beams L1, L2, and L3 in the image are blocked by the touch wiring arranged near the opening 70, so as to be prevented from being emitted from the opening 70. Specifically, for example Figure 6The light L2 and L3 in the organic light emitting layer 32 can be shielded by the second portion 922 which is lower than the organic light emitting layer 32, and these light rays are prevented from being emitted from the opening 70. In this way, the light leakage phenomenon existing at the edge of the opening can be significantly reduced or even avoided. In addition, by setting a second touch line or a pseudo touch line close to the opening as the shading structure, the shading structure and the second touch line can be formed by the same composition process, so the number of composition processes will not be increased additionally, and it is beneficial to save manufacturing costs.

[0096] Figure 7 1 is a flow chart of a method for preparing an electroluminescent display substrate according to an embodiment of the present disclosure. Figure 5 and Figure 7 , the preparation method can be performed according to the following steps. It should be noted that, according to some embodiments of the present disclosure, some of the following steps can be performed individually or in combination, and can be performed in parallel or sequentially, and are not limited to the specific operation sequence described below.

[0097] In step S101, various film layers of a thin film transistor are sequentially formed on a base substrate 10 to form Figure 5 The thin film transistor, the first insulating layer 110, the conductive layer 120, the second insulating layer 130 and the isolation structure 60 are shown in FIG.

[0098] In step S102 , a display light emitting element 30 is formed on the base substrate 10 .

[0099] In step S103 , a packaging structure 40 is formed on the base substrate 10 , so that the packaging structure 40 packages the display light emitting element 30 .

[0100] In step S104 , a barrier layer 160 is formed on a side of the package structure 40 away from the base substrate 10 .

[0101] In step S105 , a touch structure 150 is formed on a side of the barrier layer 160 away from the base substrate 10 .

[0102] For example, a first touch layer 151, a touch insulating layer 153, a second touch layer 152 and a touch cover layer 154 are sequentially formed on the surface of the barrier layer 160 away from the base substrate 10. The first touch layer 151 includes a plurality of first touch wires 91 disposed in the same layer, and a first touch wire close to the opening 70 among the plurality of first touch wires 91 is formed to be wide enough so that the touch wire includes a first portion 911 and a second portion 912 extending continuously, the first portion 911 of the touch wire is located at a position higher than the display light emitting element 30, and the second portion 912 of the touch wire is located at a position lower than the display light emitting element 30, so as to form the light shielding structure 50.

[0103] In step S106 , an opening 70 penetrating the base substrate 10 and each film layer on the base substrate 10 is formed in the region surrounded by the isolation structure 60 .

[0104] For example, laser, stamping or other cutting processes may be used to remove portions of the film layers and the substrate in the area surrounded by the isolation structure 60 to form the opening 70 .

[0105] In the above-mentioned preparation method, the packaging reliability of the display substrate can be improved without changing the existing process flow.

[0106] It should be noted that the above embodiments are merely illustrative of the preparation method according to the embodiments of the present disclosure. The specific execution process of each step or the order of the steps may be changed without departing from the technical concept of the present disclosure.

[0107] It should be understood that the above-mentioned preparation method provided in the embodiment of the present disclosure should have the same characteristics and advantages as the display substrate provided in the embodiment of the present disclosure. Therefore, the characteristics and advantages of the above-mentioned preparation method provided in the embodiment of the present disclosure can refer to the characteristics and advantages of the display substrate described above, and will not be repeated here.

[0108] The embodiment of the present disclosure also provides a display device, comprising the electroluminescent display substrate provided by the above embodiment. Figure 8 , which shows a plan view of a display device according to an embodiment of the present disclosure, and the display device 1000 may include any of the display substrates described above, and in particular, it may be a display device with at least one opening. For example, the display device may be any product or component with a display function, such as a smart phone, a wearable smart watch, smart glasses, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a car display, an e-book, or the like.

[0109] Although some embodiments of the general inventive concept of the present disclosure have been illustrated and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general inventive concept of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. An electroluminescent display substrate, characterized in that: include: substrate substrate; A display light-emitting element disposed on the base substrate, wherein the display light-emitting element comprises a light-emitting layer for emitting light; A packaging structure disposed on the base substrate and covering the display light-emitting element; A light shielding structure disposed on a side of the packaging structure away from the substrate; An opening, wherein the opening at least passes through the packaging structure; and An isolation structure is provided on the substrate. The orthographic projection of the light shielding structure on the base substrate is located between the orthographic projection of the light emitting layer of the display light emitting element on the base substrate and the orthographic projection of the opening on the base substrate. The light shielding structure comprises a first light shielding portion and a second light shielding portion extending continuously, the base substrate comprises a first surface close to the display light emitting element and the light shielding structure, and a vertical distance between the first light shielding portion and the first surface of the base substrate is greater than a vertical distance between the second light shielding portion and the first surface of the base substrate; The encapsulation structure comprises a first inorganic encapsulation layer disposed on a side of the display light-emitting element away from the base substrate and a second inorganic encapsulation layer disposed on a side of the first inorganic encapsulation layer away from the base substrate, wherein the orthographic projection of the second light-shielding portion on the base substrate falls within the orthographic projection of each of the first inorganic encapsulation layer and the second inorganic encapsulation layer on the base substrate; The isolation structure includes at least one cofferdam structure, the cofferdam structure is located between the opening and the display light-emitting element, and the orthographic projection of the shading structure on the base substrate overlaps with the orthographic projection of the cofferdam structure on the base substrate.

2. The electroluminescent display substrate according to claim 1, wherein: The isolation structure includes two cofferdam structures, the two cofferdam structures are arranged at an interval, and the orthographic projection of the second light shielding portion on the base substrate overlaps with the orthographic projection of the portion between the two cofferdam structures on the base substrate.

3. The electroluminescent display substrate according to claim 1, wherein: The light-emitting layer of the display light-emitting element includes a first surface close to the base substrate, and a vertical distance between the second light-shielding portion and the first surface of the base substrate is smaller than a vertical distance between the first surface of the light-emitting layer and the first surface of the base substrate.

4. The electroluminescent display substrate according to claim 1, wherein: The light-emitting layer of the display light-emitting element includes a first surface close to the base substrate, and a vertical distance between the first light-shielding portion and the first surface of the base substrate is greater than a vertical distance between the first surface of the light-emitting layer and the first surface of the base substrate.

5. The electroluminescent display substrate according to claim 1, further comprising a touch control structure disposed on a side of the packaging structure away from the base substrate, wherein: The touch control structure comprises: a first touch control layer arranged on a side of the packaging structure away from the base substrate; and a second touch control layer arranged on a side of the first touch control layer away from the base substrate. The first touch layer includes a first touch structure close to the opening, the second touch layer includes a second touch structure close to the opening, and the first touch structure constitutes the light shielding structure.

6. The electroluminescent display substrate according to claim 1, further comprising a touch control structure disposed on a side of the packaging structure away from the base substrate, wherein: The touch structure includes: a first touch layer arranged on a side of the packaging structure away from the base substrate; and a second touch layer arranged on a side of the first touch layer away from the base substrate, the first touch layer includes a first touch structure close to the opening, the second touch layer includes a second touch structure close to the opening, and the second touch structure constitutes the light-shielding structure.

7. The electroluminescent display substrate according to claim 5, wherein: The first touch layer includes a plurality of first touch wires disposed in the same layer, and the first touch structure is a first touch wire among the plurality of first touch wires that is close to the opening.

8. The electroluminescent display substrate according to claim 5, wherein: The first touch layer includes a plurality of first touch lines arranged in the same layer, the first touch structure is a dummy touch line arranged in the same layer as the plurality of first touch lines and close to the opening, and the dummy touch line is not used to transmit actual touch signals.

9. The electroluminescent display substrate according to claim 6, wherein: The second touch layer includes a plurality of second touch wires disposed in the same layer, and the second touch structure is a second touch wire among the plurality of second touch wires that is close to the opening.

10. The electroluminescent display substrate according to claim 6, wherein: The second touch layer includes a plurality of second touch lines arranged in the same layer, and the second touch structure is a dummy touch line arranged in the same layer as the plurality of second touch lines and close to the opening, and the dummy touch line is not used to transmit actual touch signals.

11. The electroluminescent display substrate according to claim 7 or 8, wherein: The width of the light shielding structure is greater than the width of the first touch control wiring.

12. The electroluminescent display substrate according to claim 9 or 10, wherein: The width of the light shielding structure is greater than the width of the second touch control wiring.

13. The electroluminescent display substrate according to any one of claims 5 to 10, wherein: The touch structure further includes a touch insulating layer disposed on a side of the first touch layer away from the base substrate, and the touch insulating layer covers the first touch structure; the touch structure further includes a touch covering layer disposed on a side of the second touch layer away from the base substrate, and the touch covering layer covers the second touch structure.

14. The electroluminescent display substrate according to any one of claims 5 to 10, wherein: The packaging structure comprises: An organic encapsulation layer is disposed on a side of the first inorganic encapsulation layer away from the base substrate; The second inorganic encapsulation layer is arranged on a side of the organic encapsulation layer away from the base substrate, and an area of ​​an orthographic projection of the organic encapsulation layer on the base substrate is smaller than an area of ​​an orthographic projection of each of the first inorganic encapsulation layer and the second inorganic encapsulation layer on the base substrate. The orthographic projection of the first light shielding portion on the base substrate overlaps with the orthographic projection of the organic encapsulation layer on the base substrate, and the orthographic projection of the second light shielding portion on the base substrate does not overlap with the orthographic projection of the organic encapsulation layer on the base substrate.

15. A display device, characterized in that: An electroluminescent display substrate comprising any one of claims 1-14.

16. An electroluminescent display substrate, characterized in that: include: substrate substrate; A display light-emitting element disposed on the base substrate, wherein the display light-emitting element comprises a light-emitting layer for emitting light; A packaging structure disposed on the base substrate and covering the display light-emitting element; A light shielding structure disposed on a side of the packaging structure away from the substrate; and an opening, wherein the opening at least penetrates the packaging structure, The orthographic projection of the light shielding structure on the base substrate is located between the orthographic projection of the light emitting layer of the display light emitting element on the base substrate and the orthographic projection of the opening on the base substrate. The light shielding structure comprises a first light shielding portion and a second light shielding portion extending continuously, the base substrate comprises a first surface close to the display light emitting element and the light shielding structure, and a vertical distance between the first light shielding portion and the first surface of the base substrate is greater than a vertical distance between the second light shielding portion and the first surface of the base substrate; The encapsulation structure comprises a first inorganic encapsulation layer disposed on a side of the display light-emitting element away from the base substrate and a second inorganic encapsulation layer disposed on a side of the first inorganic encapsulation layer away from the base substrate, wherein the orthographic projection of the second light-shielding portion on the base substrate falls within the orthographic projection of each of the first inorganic encapsulation layer and the second inorganic encapsulation layer on the base substrate; The display substrate further comprises a touch structure disposed on a side of the packaging structure away from the base substrate, wherein the touch structure comprises: a first touch layer disposed on a side of the packaging structure away from the base substrate and a second touch layer disposed on a side of the first touch layer away from the base substrate, The light shielding structure is located on the first touch control layer and / or the second touch control layer.

17. The electroluminescent display substrate according to claim 16, wherein: The first touch layer includes a plurality of first touch lines arranged in the same layer, the first touch structure is a dummy touch line arranged in the same layer as the plurality of first touch lines and close to the opening, and the dummy touch line is not used to transmit actual touch signals.

18. The electroluminescent display substrate according to claim 16, wherein: The second touch layer includes a plurality of second touch lines arranged in the same layer, and the second touch structure is a dummy touch line arranged in the same layer as the plurality of second touch lines and close to the opening, and the dummy touch line is not used to transmit actual touch signals.

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