Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a substrate; the flat layer is positioned on one side of the substrate; the pixel defining layer is located on the side, away from the substrate, of the flat layer and comprises a plurality of first openings which are spaced apart; the heightening layer is located on the side, close to the flat layer, of the pixel defining layer, the orthographic projection, on the substrate, of the heightening layer is located in the peripheral area of the orthographic projection, on the substrate, of the first opening, and the orthographic projection, on the substrate, of the heightening layer is overlapped with the orthographic projection, on the substrate, of the defining layer; wherein the pixel defining layer comprises a first part and a second part, the orthographic projection, on the substrate, of the first part is located in the orthographic projection, on the substrate, of the surface, away from the side of the substrate, of the heightening layer, and the second part is located on the side, away from the first opening, of the heightening layer; wherein the thickness of the first part is smaller than that of the second part.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] In the field of optoelectronic display technologies, an organic light-emitting diode (OLED) has many advantages such as active light emission, high brightness, high contrast, ultrathin, low power consumption, flexibility, and a wide operating temperature range, and is an advanced new mainstream flat panel display technology. Summary of the Invention

[0003] In a first aspect, a display panel is provided, including:

[0004] A substrate;

[0005] A planarization layer located on one side of the substrate;

[0006] A pixel definition layer located on a side of the planarization layer away from the substrate, including a plurality of spaced-apart first openings;

[0007] A spacer layer located on a side of the pixel definition layer close to the planarization layer, a positive projection of the spacer layer on the substrate is located in a peripheral area of a positive projection of the first opening on the substrate, and the positive projection of the spacer layer on the substrate overlaps with the positive projection of the definition layer on the substrate;

[0008] Wherein, the pixel definition layer includes a first portion and a second portion, a positive projection of the first portion on the substrate is located within a positive projection of a surface of the spacer layer away from the substrate on the substrate, and the second portion is located on a side of the spacer layer away from the first opening;

[0009] Wherein, a thickness of the first portion is less than a thickness of the second portion.

[0010] Exemplarily, the display panel further includes a first electrode layer, the first electrode layer includes a first electrode region and a second electrode region located around the first electrode region, and a positive projection of the first electrode region on the substrate overlaps with the positive projection of the first opening on the substrate;

[0011] Wherein, a thickness of the second electrode region is greater than a thickness of the first electrode region, and the spacer layer includes the second electrode region; and / or, the spacer layer is located on a side of the second electrode region away from the substrate.

[0012] Exemplarily, the material of the spacer layer includes polystyrene-based plastics.

[0013] Exemplarily, the thickness of the first part is 10% to 60% of the thickness of the second part.

[0014] Exemplarily, the thickness of the first part is less than the maximum thickness of the cushion layer.

[0015] Exemplarily, the thickness of the first part is 0.7 to 0.9 μm, and the thickness of the second part is 0.9 μm to 1.5 μm.

[0016] Exemplarily, the cushion layer includes a surface on a side away from the substrate, and a first sidewall and a second sidewall connected to the surface, the first sidewall being close to the first opening;

[0017] Wherein, the slope angle of the first sidewall is 45 to 80°, and the slope angle of the sidewall of the first part close to the first opening is 45 to 80°.

[0018] Exemplarily, the cushion layer includes a surface on a side away from the substrate, and a first sidewall and a second sidewall connected to the surface, the first sidewall being close to the first opening, and the second sidewall being away from the first opening;

[0019] Wherein, the pixel defining layer does not include a portion located on the first sidewall.

[0020] Exemplarily, in the orthographic projection of the pixel defining layer on the substrate, the boundary close to the first opening is located within the orthographic projection of the surface of the cushion layer on the side away from the substrate on the substrate.

[0021] Exemplarily, the display panel further includes a light-emitting element, and the light-emitting element includes:

[0022] A first electrode layer, located on one side of the substrate, including first electrode regions respectively corresponding to a plurality of the first openings, and the orthographic projection of the first electrode region on the substrate overlaps with the orthographic projection of the first opening on the substrate;

[0023] A light-emitting layer, located on a side of the first electrode layer away from the substrate;

[0024] A second electrode layer, located on a side of the light-emitting layer away from the substrate;

[0025] A light-shielding layer, located on a side of the second electrode layer away from the substrate, and the light-shielding layer includes second openings corresponding to the first openings;

[0026] A color conversion layer is located at the second opening, and a positive projection of the color conversion layer on the substrate substrate overlaps at least partially with a positive projection of the light-emitting layer on the substrate substrate.

[0027] Exemplarily, a positive projection of the light-shielding layer on the substrate substrate is located within a positive projection of the pixel defining layer on the substrate substrate.

[0028] Exemplarily, a positive projection of the light-shielding layer on the substrate substrate does not overlap with a positive projection of the pad layer on the substrate substrate; or, a positive projection of the light-shielding layer on the substrate substrate partially overlaps with a positive projection of the pad layer on the substrate substrate.

[0029] Exemplarily, the pad layer includes a first boundary close to the first opening, the light-shielding layer includes a second boundary close to the second opening, and a distance between positive projections of the first boundary and the second boundary on the substrate substrate is less than or equal to 6 μm.

[0030] Exemplarily, the pad layer includes a third boundary far from the first opening, the light-shielding layer includes a second boundary close to the second opening, and a distance between positive projections of the third boundary and the second boundary on the substrate substrate is 0.5 μm to 4 μm.

[0031] Exemplarily, in a direction of the pad layer facing the first opening, a size of the pad layer is less than or equal to 6 μm.

[0032] In a second aspect of the present disclosure, a display device is provided, including a display panel in any exemplary embodiment of the first aspect.

[0033] The display panel provided by the disclosure includes a substrate substrate, a planarization layer, a pixel defining layer, and a pad layer. Among them, the pixel defining layer includes a first opening, the pad layer is located in a peripheral area of the first opening, and is located on a side of the pixel defining layer close to the substrate substrate and overlaps with the pixel defining layer. Thus, the peripheral area of the first opening is raised. The pixel defining layer may include a first portion located on the pad layer and a second portion located on a side of the pad layer away from the first opening. Since the peripheral area of the first opening is raised, a thickness of the pixel defining layer above the pad layer can be thinned. After the pixel defining layer is thinned, a slope of a sidewall of the pixel defining layer near the first opening can be increased. In this way, when the display panel is in a dark state display, reflection of external light by the sidewall of the first opening (i.e., the sidewall of the pixel defining layer) can be reduced, and divergence of the reflected light at the sidewall of the first opening can be avoided, thereby avoiding formation of a diffraction aperture and improving display quality.

[0034] The above description is only an overview of the technical solution of the present disclosure. In order to better understand the technical means of the present disclosure, it can be implemented according to the content of the specification. In order to make the above and other purposes, features, and advantages of the present disclosure more obvious and understandable, the specific embodiments of the present disclosure are hereinafter specifically exemplified. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. It should be noted that the ratios in the drawings are only for illustration and do not represent the actual ratios.

[0036] Figure 1 Shows a top plan view schematic diagram of the display panel of this embodiment;

[0037] Figure 2a Shows a cross-sectional structure schematic diagram of the first electrode layer;

[0038] Figure 2b Shows a top plan view schematic diagram of the first electrode layer and the pixel defining layer;

[0039] Figure 3a and Figure 3b Respectively show the cross-sectional structure schematic diagrams between the spacer layer and the pixel defining layer;

[0040] Figures 4 - 7 Shows the cross-sectional structure schematic diagrams of four display panels along the Figure 1 AA' line;

[0041] Figures 8 - 11 Shows the cross-sectional structure schematic diagrams of several first electrode layers;

[0042] Figure 12 Shows a plan view schematic diagram of the pixel defining layer and the spacer layer;

[0043] Figure 13 and Figure 14 Show the plan view schematic diagrams of several light-shielding layers, pixel defining layers, and spacer layers. Detailed Embodiments

[0044] To make the above objects, features, and advantages of the present disclosure more apparent and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0045] In this specification, "electrically connected" and "coupled" include cases where components are connected together through elements having a certain electrical effect. There is no particular limitation on the "element having a certain electrical effect" as long as it can transfer electrical signals between the components to be connected. Examples of the "element having a certain electrical effect" include not only electrodes and wirings, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having various functions.

[0046] In this specification, "parallel" means a state where the angle formed by two straight lines is -10° or more and 10° or less, and thus also includes a state where the angle is -5° or more and 5° or less. Additionally, "perpendicular" means a state where the angle formed by two straight lines is 80° or more and 100° or less, and thus also includes an angle state of 85° or more and 95° or less.

[0047] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted in an open, inclusive sense, that is, "including, but not limited to".

[0048] In the embodiments of the present application, "same layer" refers to the relationship between multiple film layers formed from the same material after the same step (such as a single patterning process). In this specification, a polygon is not strictly defined and can be an approximate triangle, parallelogram, trapezoid, pentagon, hexagon, etc., and there may be some small deformations caused by tolerances.

[0049] In the embodiments of the present application, since the source and drain of a transistor are symmetric, the source and drain can be interchanged. In the embodiments of the present application, one of the source and drain of the transistor can also be referred to as the first pole, and the other of the source and drain can be referred to as the second pole.

[0050] In OLED display panels, with the popularization of OLED product applications and the increasing demand for perfect display effects, COE (Color On Encapsulation, depolarizing screen technology) that can effectively reduce power consumption and comprehensively improve color is increasingly used in products. COE technology consists of BM, R / G / B color filters and O / C cover layer (for flat surface). Among them, COE technology brings about an increase in the reflectivity of the screen in the dark state, and the increase in reflectivity will form a diffraction image due to the reflection of external light.

[0051] In view of this, the present disclosure provides a display panel and a display device, which raises the peripheral area of ​​the first opening so that the thickness of the portion of the pixel defining layer located in the peripheral area of ​​the first opening is reduced. The reduced thickness can increase the slope of the side wall of the pixel defining layer at the first opening, thereby avoiding diffraction caused by the divergence of reflected light when external light is reflected at this side wall.

[0052] The display panel according to the embodiment of the present disclosure is exemplarily described below with reference to the accompanying drawings.

[0053] In one embodiment, a display panel is provided. Figure 1 , Figure 3a , Figure 3b , Figures 4 - 7 As shown, Figure 1 FIG. 4 is a schematic top plan view of a display panel of the present embodiment, Figure 3a and Figure 3b The cross-sectional structure diagrams of the cushioning layer are shown respectively. Figures 4 - 7 Four display panels are shown along Figure 1 As shown in the above figure, the display panel in this embodiment may include:

[0054] Base substrate 11;

[0055] A flat layer 12, located on one side of the base substrate 11;

[0056] The pixel defining layer 13 is located on the side of the flat layer 12 away from the base substrate 11 and includes a plurality of spaced-apart first openings 31;

[0057] The padding layer 29 is located on a side of the pixel defining layer 13 close to the base substrate 11, and the orthographic projection of the padding layer 29 on the base substrate 11 is located in a peripheral area of ​​the orthographic projection of the first opening 31 on the base substrate 11, and the orthographic projection of the padding layer 29 on the base substrate 11 overlaps with the orthographic projection of the defining layer 13 on the base substrate;

[0058] Among them, the pixel defining layer 13 includes a first part 13a and a second part 13b. The orthographic projection of the first part 13a on the substrate is located within the orthographic projection of the surface of the pad layer 29 facing away from the substrate on the substrate 11, and the second part 13b is located on the side of the pad layer 29 facing away from the first opening 31;

[0059] Among them, the thickness of the first part 13a is less than the thickness of the second part 13b.

[0060] As Figure 1 shown, the substrate 11 may be a driving substrate. The substrate 11 may include a display area and a non-display area. The non-display area may partially or completely enclose the display area. The display area may include a plurality of sub-pixel areas P, and the plurality of sub-pixel areas P may be arranged in an array.

[0061] Among them, a light-emitting element may be provided in each sub-pixel area P. In the thickness direction y of the substrate 11, the light-emitting element may include an anode, a cathode, and a light-emitting layer 28 located between the anode and the cathode.

[0062] Among them, the substrate 11 may include a plurality of pixel driving circuits, and the plurality of pixel driving circuits may be located in the display area; each pixel driving circuit corresponds to a sub-pixel area. The pixel driving circuit may include a capacitor and at least one thin-film transistor. For example, the pixel driving circuit may include two transistors and one capacitor (2T1C); or, it may include four transistors and two capacitors (4T2C); or, it may include five transistors and two capacitors (5T2C); or, it may include six transistors and two capacitors (6T1C); or, it may include seven transistors and one capacitor (7T1C); or, it may include eight transistors and one capacitor (8T1C).

[0063] Among them, when the pixel driving circuit includes a plurality of thin-film transistors, the plurality of thin-film transistors may include a driving transistor connected to the anode of the light-emitting element.

[0064] Among them, the substrate 11 may further include a gate driving circuit GOA. The gate driving circuit may be located in the non-display area, and the gate driving circuit may be connected to the plurality of pixel driving circuits in the display area for providing a gate driving signal to the pixel driving circuits.

[0065] In some examples, the substrate 11 can be applied to an AMOLED (Active-matrix organic light-emitting diode) panel with LTPS (Low Temperature Poly-Silicon) - TFTs, or can also be applied to an AMOLED panel with IGZO (Indium Gallium Zinc Oxide) - TFTs.

[0066] As Figures 4 - 7 shown, a planarization layer 12 can also be included on one side of the substrate 11. The surface of the planarization layer 12 facing away from the substrate 11 can be a flat surface, and the orthographic projection of the planarization layer 12 on the substrate 11 can cover the display area and the non-display area.

[0067] As Figures 4 - 7 shown, the pixel defining layer 13 can be located on the side of the planarization layer 12 facing away from the substrate 11. The pixel defining layer 13 can include a first opening 31, and the first opening 31 corresponds to the sub-pixel region. In this way, the pixel defining layer 13 can define a plurality of sub-pixel regions. As Figure 3a shown, the shape of the orthographic projection of the pixel defining layer 13 on the substrate 11 can be grid-shaped, and each grid can be regarded as a first opening 31.

[0068] As Figure 3a 、 Figure 4 、 Figure 5 、 Figure 6 shown, the spacer layer 29 can be located on the side of the pixel defining layer 13 close to the substrate 11. As Figure 1 shown, the orthographic projection of the spacer layer 29 on the substrate 11 can be located in the peripheral region of the first opening 31, and the spacer layer 29 is used to increase the thickness of the pixel defining layer 13 in the peripheral region of the first opening 31.

[0069] Among them, the spacer layer 29 can be formed of an insulating material or a conductive material. When an insulating material is used, the spacer layer 29 can be an inorganic material.

[0070] Among them, the orthographic projection of the spacer layer 29 on the substrate can be annular, such as circular annular, elliptical annular, or polygonal annular.

[0071] Among them, the spacer layer 29 surrounds the edge region of the first opening 31, and the spacer layer forms a third opening 33. The third opening 33 and the first opening 31 together form a sub-pixel region for placing the light-emitting element.

[0072] In some examples, such as Figure 3aAs shown, the orthographic projection of the third opening 33 on the substrate 11 may be located within the orthographic projection of the first opening 31 on the substrate 11. In this way, the orthographic projection of the pad layer 29 on the substrate 11 may be located within the inner edge region of the first opening 31.

[0073] As Figure 3a shown, in a specific example, the orthographic projection of the pad layer 29 on the substrate 11 may partially overlap with the orthographic projection of the first opening on the substrate 11. For example, the pad layer 29 may include a portion located within the first opening 31 and a portion located outside the first opening 31.

[0074] In some examples, as Figure 3b shown, the orthographic projection of the third opening 33 on the substrate 11 may cover the orthographic projection of the first opening 31 on the substrate 11. In this way, the orthographic projection of the pad layer 29 on the substrate 11 may be located within the outer edge region of the first opening 31. For example, the orthographic projection of the pad layer 29 on the substrate 11 may enclose the orthographic projection of the first opening 31 on the substrate 11.

[0075] In an exemplary embodiment, as Figure 1 shown, the orthographic projection of the first opening 31 on the substrate 11 may be circular or elliptical or polygonal, and the orthographic projection of the pad layer 29 on the substrate 11 may be annular, for example, may be circular annular or elliptical annular, or the inner contour of the orthographic projection of the pad layer 29 on the substrate 11 is polygonal and the outer contour is circular or elliptical.

[0076] Among them, the outer contour of the orthographic projection of the pad layer 29 on the substrate 11 and the outer contour of the orthographic projection of the first opening on the substrate 11 may be conformal. For example, if the outer contour of the orthographic projection of the first opening on the substrate 11 is circular, then the outer contour of the orthographic projection of the pad layer on the substrate 11 is also circular. In one example, the center of the orthographic projection of the pad layer on the substrate 11 coincides with the center of the orthographic projection of the first opening on the substrate 11.

[0077] Among them, the inner contour of the orthographic projection of the pad layer 29 on the substrate 11 is also called the first boundary 291, and the outer contour of the orthographic projection of the pad layer on the substrate 11 is also called the third boundary 292.

[0078] In this embodiment, the surface of the pad layer 29 facing away from the substrate 11 may be in direct contact with the bottom surface of the pixel defining layer 13 close to the substrate 11.

[0079] Among them, the pixel defining layer 13 may include a first portion 13a and a second portion 13c, as Figure 3aAs shown, the first part 13a is located on the side of the cushion layer 29 away from the substrate 11, and the orthographic projection of the first part 13a on the substrate 11 is located within the orthographic projection on the substrate 11 of the surface of the cushion layer 29 on the side away from the substrate 11. The orthographic projection of the second part 13c on the substrate 11 is located on the side of the orthographic projection of the cushion layer 29 on the substrate 11 that is away from the orthographic projection of the first electrode region 26a on the substrate 11.

[0080] It should be noted that the orthographic projection on the substrate 11 of the surface of the cushion layer 29 on the side away from the substrate 11 can refer to the orthographic projection on the substrate 11 of the top surface of the cushion layer 29. For example, the cushion layer 29 can include the surface on the side away from the substrate 11, as well as a first side wall 263 and a second side wall 264 connected to the surface. The first side wall 263 is close to the first opening 31, and the second side wall 264 is away from the first opening 31. Among them, the first part 13a can refer to the orthographic projection part on the substrate 11 of the surface of the cushion layer 29.

[0081] In one example, please refer to Figure 3a as shown. Figure 3a The cross-sectional structure diagram of the pixel defining layer 13 and the first electrode layer 26 is shown. As Figure 3a shown, the pixel defining layer 13 can further include a third part 13b located on the second side wall 264 of the cushion layer 29. The third part 13b is located between the first part 13a and the second part 13c. In the direction of the first part 13a towards the second part 13c, the linear distance from the surface of the third part 13b on the side away from the substrate to the second side wall 264 gradually increases, such as showing a linear increasing trend.

[0082] In one example, please refer to Figure 3b as shown. The pixel defining layer 13 can further include a fourth part 13d located on the first side wall 263 of the cushion layer 29. In this way, the fourth part 13d can be located on the side of the first part 13a close to the first opening 31, and the thickness of the fourth part 13d can be less than or equal to the thickness h1 of the first part 13a. In this case, the fourth part serves as the side wall of the first opening 31, and the slope of the fourth part can be equivalent to the slope of the first side wall 263. Increasing the slope of the first side wall 263 can increase the slope of the fourth part to improve the diffraction phenomenon.

[0083] In this way, the orthographic projection of the first part 13a on the substrate 11 can be located within the orthographic projection of the cushion layer 29 on the substrate 11.

[0084] Among them, the second part 13c of the pixel defining layer 13 has no overlap with the orthographic projection of the cushion layer 29 on the substrate 11. Please refer to Figure 2bAs shown, when viewed in the planar direction of the substrate 11, the second portion 13c is located on the side of the pad layer 29 away from the first opening 31. In one case, the second portion 13c can also be the portion of the pixel defining layer 13 between two adjacent pad layers 29 in position.

[0085] As Figure 3a and Figure 3b shown, the maximum thickness h3 of the second portion 13c can be the sum of the thickness h1 of the first portion 13a and the thickness h2 of the pad layer 29.

[0086] In this embodiment, the pixel defining layer 13 can be made of an opaque material. For example, the pixel defining material can be a black insulating material.

[0087] In this embodiment, the pad layer 29 can be formed of a material with a reflective effect, such as a white material, which can reflect the light of the light-emitting element located in the first opening 31 to improve the light extraction rate of the light.

[0088] In some examples, the pad layer 29 can be formed of a PS (Polystyrene) - based plastic. Among them, the PS material is a colorless and transparent thermoplastic plastic, which has the characteristics of rigidity, transparency, and strong water resistance.

[0089] Of course, in some other examples, other insulating materials can also be used for formation.

[0090] In an exemplary embodiment, a light-emitting element can also be provided at the first opening 31. The light-emitting element can be any one of an organic light-emitting diode (OLED), a light-emitting diode (LED), a quantum dot light-emitting diode (QLED), a micro-LED (including: mini-LED or micro-LED), etc.

[0091] In some exemplary embodiments, taking the light-emitting element as an organic light-emitting diode as an example, as Figure 7 shown, the display panel further includes a first electrode layer 26. The first electrode layer 26 includes a first electrode region 26a and a second electrode region 26b located around the first electrode region. The orthographic projection of the first electrode region 26a on the substrate overlaps with the orthographic projection of the first opening 31 on the substrate 11;

[0092] Among them, as Figure 6 and 7 shown, the thickness of the second electrode region 26b is greater than the thickness of the first electrode region 26a, and the pad layer 29 includes the second electrode region 26b; and / or, asFigure 4 and Figure 5 As shown in Figure 5 , the cushion layer is located on the side of the second electrode region 26b facing away from the substrate 11.

[0093] Wherein, when the cushion layer 29 is located on the side of the second electrode region 26b facing away from the substrate, the thickness of the cushion layer 29 is greater than the thickness of the second electrode region 26b and greater than the thickness of the first electrode region 26a; in this example, as Figures 4 - 5 shown, the thicknesses of the first electrode region 26a and the second electrode region 26b can be the same. Or, in some other examples, the thickness of the first electrode region 26a can be less than the thickness of the second electrode region 26b.

[0094] In this embodiment, as Figure 6 and Figure 7 shown, when the cushion layer 29 includes the second electrode region 26b, the second electrode region 26b can be used as the cushion layer 29. Then, when forming the pixel defining layer 13 and the first electrode layer 26, the first electrode layer 26 can be formed first, and then, the pixel defining layer 13 can be formed on the side of the first electrode layer 26 facing away from the substrate 11. Since the thickness h2 of the second electrode region 26b in the first electrode layer 26 is greater than the thickness of the first electrode region 26a, the thickness of the pixel defining layer 13 in the region near the first opening 31 is relatively thin, and the thickness h1 of the first part 13a in the pixel defining layer 13 is less than the thickness h3 of the second part 13c. In this way, the slope of the side wall of the pixel defining layer 13 near the first opening 31 is relatively high, which can reduce the divergence of the reflected light of the external light by the side wall of the pixel defining layer 13, thereby avoiding the formation of a diffraction aperture at the side wall of the first opening 31, and thus improving the display quality of the display panel.

[0095] Wherein, the first electrode layer 26 can be located on the side of the planarization layer 12 facing away from the substrate 11 and on the side of the pixel defining layer 13 close to the substrate 11. As Figures 4 - 7 shown, the orthographic projection of the first electrode layer 26 on the substrate 11 can cover the orthographic projection of the first opening 31 on the substrate 11.

[0096] As Figures 4 - 7 shown, the first electrode layer 26 can include a first electrode region 26a located at the first opening 31 and a second electrode region 26b located around the first electrode region 26a. The orthographic projection of the first electrode region 26a on the substrate 11 can overlap with the orthographic projection of the first opening 31 on the substrate 11. As Figures 4 - 7 shown, the orthographic projection of the first electrode region 26a on the substrate 11 can cover the orthographic projection of the first opening 31 on the substrate 11, or the orthographic projection of the first electrode region 26a on the substrate 11 can fall within the orthographic projection of the first opening 31 on the substrate 11.

[0097] Among them, the second electrode region 26b is located in the peripheral region of the first electrode region 26a, such as Figure 2a and Figure 2b shown, the orthographic projection of the second electrode region 26b on the substrate 11 can enclose the orthographic projection of the first electrode region 26a on the substrate 11.

[0098] Among them, the second electrode region 26b is located on the side of the pixel defining layer 13 close to the substrate 11. When the second electrode region 26b is used as a pad layer, the surface of the side facing away from the substrate 11 can be in direct contact with the pixel defining layer 13.

[0099] Such as Figure 2a shown, the thickness h2 of the second electrode region 26b is greater than the thickness of the first electrode region 26a. In this way, the peripheral region of the first electrode layer 26 is raised.

[0100] In an exemplary embodiment, such as Figure 2b shown, the orthographic projection of the first electrode region 26a on the substrate 11 can be circular, elliptical or polygonal, and the orthographic projection of the second electrode region 26b on the substrate 11 can be annular. For example, it can be circular annular or elliptical annular, or the inner contour line of the orthographic projection of the second electrode region 26b on the substrate 11 is polygonal and the outer contour line is circular.

[0101] Among them, the outer contour of the orthographic projection of the second electrode region 26b on the substrate 11 can be conformal to the outer contour of the orthographic projection of the first electrode region 26a on the substrate 11. For example, if the outer contour of the orthographic projection of the first electrode region 26a on the substrate 11 is circular, then the outer contour of the orthographic projection of the second electrode region 26b on the substrate 11 is also circular. In one example, the projections of the centers of the first electrode region 26a and the second electrode region 26b on the substrate 11 coincide.

[0102] Among them, the inner contour of the orthographic projection of the second electrode region 26b on the substrate 11 is also called the first boundary 291, and the outer contour of the orthographic projection of the second electrode region 26b on the substrate 11 is also called the third boundary 292.

[0103] In an exemplary embodiment, such as Figure 2b shown, the area of the orthographic projection of the first electrode region 26a on the substrate 11 is larger than the area of the orthographic projection of the second electrode region 26b on the substrate 11. For example, when the orthographic projection of the first electrode region 26a on the substrate 11 is circular and the orthographic projection of the second electrode region 26b on the substrate 11 is circular annular, the diameter of the first electrode region 26a can be greater than the dimension of the second electrode region 26b in the radial direction of the first electrode region 26a.

[0104] Among them, the first electrode layer 26 can serve as the anode of the light-emitting element; in another example, the first electrode layer 26 can serve as the cathode of the light-emitting element.

[0105] Among them, the material of the first electrode layer 26 can include at least one of a light-transmitting conductive material and a metal conductive material with a reflective effect.

[0106] In an exemplary embodiment, the materials of the first electrode region 26a and the second electrode region 26b in the first electrode layer 26 can be the same. In this way, the first electrode region 26a and the second electrode region 26b can be disposed in the same layer. When forming the first electrode layer 26, a conductive layer can be first patterned and then etched to etch out the first electrode region 26a, thereby obtaining the first electrode region 26a and the second electrode region 26b.

[0107] In an exemplary embodiment, the materials of the first electrode region 26a and the second electrode region 26b can be different. In this way, the first electrode region 26a and the second electrode region 26b can be formed in multiple processes. For example, the first electrode region 26a is first formed, and then the second electrode region 26b is formed around the first electrode region 26a. Alternatively, the second electrode region 26b is first formed, and then the first electrode region 26a is formed in the region enclosed by the second electrode region 26b.

[0108] In an exemplary embodiment, the pad layer 29 can also be located on the side of the second electrode region 26b away from the substrate 11. In this way, the pad layer 29 can be located between the pixel defining layer 13 and the second electrode region 26b. In this example, the maximum thickness h2 of the pad layer 29 can be greater than or equal to the thickness of the first electrode region 26a.

[0109] In this embodiment, as Figure 4 and Figure 5 shown, the orthographic projection of the pad layer 29 on the substrate can partially overlap with the orthographic projection of the second electrode region 26b on the substrate.

[0110] Next, the thicknesses of the first part 13a and the second part 13c of the pixel defining layer 13 will be described.

[0111] In some embodiments, the thickness h1 of the first part 13a can be 10% to 60% of the thickness h3 of the second part 13c.

[0112] As shown in FIG. 2- Figure 7 shown, the thickness h1 of the first part 13a of the pixel defining layer 13 is less than the thickness h3 of the second part 13c. In one example, the thickness h3 of the second part 13c can be the sum of the thickness h1 of the first part 13a and the maximum thickness h2 of the pad layer 29.

[0113] Among them, the thickness h1 of the first part 13a is 0.1 to 0.6 times the thickness h3 of the second part 13c, and the maximum thickness h2 of the cushion layer 29 can be 0.4 to 0.9 times the thickness h3 of the second part 13c. In this way, most of the thickness at the edge of the pixel defining layer 13 can be raised by the cushion layer 29, so that the part of the pixel defining layer 13 above the cushion layer 29 is thinned.

[0114] Among them, the thickness h1 of the first part 13a can be 0.1 times the thickness of the second part 13c, and the maximum thickness h2 of the cushion layer 29 can be 0.9 times the thickness of the second part 13c.

[0115] Among them, the thickness h1 of the first part 13a can be 0.2 times the thickness of the second part 13c, and the maximum thickness h2 of the cushion layer 29 can be 0.8 times the thickness of the second part 13c.

[0116] Among them, the thickness h1 of the first part 13a can be 0.4 times the thickness of the second part 13c, and the maximum thickness h2 of the cushion layer 29 can be 0.6 times the thickness of the second part 13c.

[0117] Among them, the thickness h1 of the first part 13a can be 0.5 times the thickness of the second part 13c, and the maximum thickness h2 of the cushion layer 29 can be 0.5 times the thickness of the second part 13c.

[0118] Among them, the thickness h1 of the first part 13a can be 0.6 times the thickness of the second part 13c, and the maximum thickness h2 of the cushion layer 29 can be 0.4 times the thickness of the second part 13c.

[0119] In an exemplary embodiment, the thickness h1 of the first part 13a can be 0.3 to 0.9 μm, the thickness h3 of the second part 13c is 0.9 to 1.5 μm, and the thickness h2 of the cushion layer 29 can be 0.6 to 1.2 μm.

[0120] Specifically, the thickness h1 of the first part 13a can further be 0.7 to 0.9 μm.

[0121] For example, the thickness h1 of the first part 13a can be 0.7 μm, the thickness h2 of the cushion layer 29 can be 0.6 μm, and the thickness h3 of the second part 13c can be 1.3 μm; or, the thickness h1 of the first part 13a can be 0.8 μm, the thickness h2 of the cushion layer 29 can be 0.6 μm, and the thickness h3 of the second part 13c can be 1.4 μm; or, the thickness h1 of the first part 13a is 0.8 μm, the thickness h2 of the cushion layer 29 is 0.7 μm, and the thickness h3 of the second part 13c can be 1.5 μm.

[0122] Specifically, the thickness h2 of the cushion layer 29 can be 0.6 to 0.8 μm, such as 0.6 μm, 0.65 μm, 0.7 μm, 0.75 μm, 0.8 μm.

[0123] In an exemplary embodiment, the thickness h1 of the first portion 13a can be less than the maximum thickness of the cushion layer 29.

[0124] In this embodiment, when the cushion layer 29 is located on the side of the first electrode layer away from the substrate 11 and overlaps with the substrate 11, such as Figures 4 - 5 shown, the maximum thickness h2 of the cushion layer 29 can refer to: the maximum vertical distance between the surface of the cushion layer 29 away from the substrate 11 and the surface of the planarization layer 12 away from the substrate 11.

[0125] Wherein, when the thickness h1 of the first portion 13a is less than the maximum thickness of the cushion layer 29, in the thickness direction y of the substrate 11, the cushion layer 29 occupies more space of the pixel defining layer 13, so that the thickness h1 of the first portion 13a is at least less than 0.5 times the thickness h3 of the second portion 13c, so that the thickness of the pixel defining layer 13 around the first opening 31 is thinner, thereby increasing the slope of the edge sidewall of the pixel defining layer 13 to optimize the improvement of the diffraction effect.

[0126] In some embodiments, as shown in FIG. 2- Figure 7 shown, the pixel defining layer 13 may not include the portion located on the sidewall of the cushion layer 29 close to the first opening 31, that is, does not include the fourth portion.

[0127] Exemplarily, the cushion layer 29 may include a surface away from the substrate 11, and a first sidewall 263 and a second sidewall 264 connected to the surface, the first sidewall 263 is close to the first opening 31, and the second sidewall 264 is away from the first opening 31;

[0128] Wherein, as Figure 3a shown, the pixel defining layer 13 may not include the fourth portion located on the first sidewall 263.

[0129] In this way, the cushion layer 29 can form a third opening 33, as Figures 12 - 14 shown, the orthographic projection of the third opening 33 on the substrate 11 can be located within the orthographic projection of the first opening 31 of the pixel defining layer 13 on the substrate 11, so that the pixel defining layer 13 does not cover the sidewall of the cushion layer 29 close to the first opening 31.

[0130] Accordingly, the sidewalls of the openings in the sub-pixel region may include the first sidewall 263 of the cushion layer 29 and the third sidewall 133 of the pixel defining layer 13. The platform portion between the first sidewall 263 and the third sidewall 133 is the surface of the cushion layer 29 on the side facing away from the substrate.

[0131] In this embodiment, as Figures 4 - 7 shown, the light-emitting layer 28 of the light-emitting element may be in direct contact with the first sidewall 263 of the cushion layer 29. The second electrode layer 14 of the light-emitting element may be in direct contact with the first sidewall 263 of the cushion layer 29, a partial region of the surface of the cushion layer on the side facing away from the substrate substrate 11, the third sidewall 133 of the pixel defining layer, and the surface of the pixel defining layer 13 on the side facing away from the substrate substrate 11.

[0132] Since the pixel defining layer 13 does not include the portion near the first sidewall 263 of the cushion layer 29 close to the first opening 31, the thickness of the portion of the pixel defining layer 13 on the cushion layer 29 is very thin, and its slope will not form a slope attached to the first sidewall 263, thereby ensuring that the slope value can be increased to improve the diffraction effect.

[0133] In an example of this embodiment, the orthographic projection of the first portion 13a in the pixel defining layer 13 on the substrate substrate 11 may coincide with the orthographic projection of the surface of the cushion layer 29 on the substrate substrate 11.

[0134] In some other embodiments, as shown in FIG. 2- Figure 7 shown, when the pixel defining layer 13 does not include the portion located at the first sidewall 263, there may be a spacing between the first portion 13a in the pixel defining layer 13 and the surface boundary of the cushion layer 29. For example, the orthographic projection of the first portion 13a on the substrate substrate 11 may be located within the orthographic projection of the surface of the cushion layer 29 on the substrate substrate 11. As Figures 12 - 14 shown, the boundary 131 of the first portion 13a close to the first opening 31 is located within the surface of the cushion layer 29.

[0135] That is to say, there is a spacing between the boundary 131 (hereinafter referred to as the fourth boundary 131) of the first portion 13a close to the first opening 31 in the orthographic projection of the first portion 13a on the substrate substrate 11 and the boundary 291 (hereinafter referred to as the first boundary 291) of the surface of the cushion layer 29 on the side facing away from the substrate substrate 11 in the orthographic projection on the substrate substrate 11. That is, the orthographic projection of the first portion 13a on the substrate substrate 11 does not coincide with the surface of the cushion layer 29.

[0136] Among them, the fourth boundary 131 may also be referred to as the boundary of the pixel defining layer 13 close to the first opening 31.

[0137] Exemplarily, as Figure 12As shown, the cushioning layer 29 includes a first boundary 291 close to the first opening 31, and the first part 13a in the pixel defining layer 13 may include a fourth boundary 131 close to the first opening 31, wherein a distance a between an orthographic projection of the first boundary 291 on the base substrate 11 and an orthographic projection of the fourth boundary 131 on the base substrate 11 is greater than or equal to 0.5 μm, for example, may be 0.5 μm or may be 0.6 μm.

[0138] In an exemplary embodiment, the distance a between the orthographic projection of the first boundary 291 on the base substrate 11 and the orthographic projection of the fourth boundary 131 on the base substrate 11 may be less than the thickness h1 of the first portion 13a. For example, if the thickness h1 of the first portion 13a is 0.7-0.9 μm, the distance a may be 0.5 μm-0.69 μm.

[0139] In some embodiments, Figure 3a As shown, when the raising layer 29 includes a surface facing away from the substrate 11, and a first side wall 263 and a second side wall 264 connected to the surface, the first side wall 263, the second side wall 264 and the surface of the raising layer 29 can form a trapezoid, and the slope of the first side wall 263 and the slope of the second side wall 264 can be the same or different.

[0140] The slope angle of the first sidewall 263 may be the same as the slope angle of the sidewall of the pixel defining layer 13 close to the first opening 31 (hereinafter referred to as the third sidewall 133 ), or the slope angles of the first sidewall 263 and the sidewall 133 may be different.

[0141] Exemplarily, the slope angle of the first side wall 263 may be 45 to 80 degrees, and the slope angle of the third side wall 133 of the first portion 13 a close to the first opening 31 is 45 to 80 degrees.

[0142] For example, the slope angle of the first side wall 263 may be 45°, 55°, 60°, 65°, 70°, 75°, and 80°. In one example, the slope angle of the first side wall 263 may be 70° to 80°.

[0143] For example, the slope angle of the third side wall 133 may be 45°, 55°, 60°, 65°, 70°, 75°, and 80°. In one example, the slope angle of the third side wall 133 may be 70° to 75°.

[0144] In one example, the slope angle of the first sidewall 263 can be less than the slope angle of the third sidewall 133. For example, the slope angle of the first sidewall 263 is 70 degrees and the slope angle of the third sidewall 133 is 73 degrees, or the slope angle of the first sidewall 263 is 72 degrees and the slope angle of the third sidewall 133 is 73 degrees; or the slope angle of the first sidewall 263 is 74 degrees and the slope angle of the third sidewall 133 is 75 degrees.

[0145] In one example, the slope angle of the first sidewall 263 can be greater than the slope angle of the third sidewall 133. For example, the slope angle of the first sidewall 263 is 75 degrees and the slope angle of the third sidewall 133 is 73 degrees, or the slope angle of the first sidewall 263 is 74 degrees and the slope angle of the third sidewall 133 is 72 degrees; or the slope angle of the first sidewall 263 is 72 degrees and the slope angle of the third sidewall 133 is 70 degrees.

[0146] In one example, the slope angle of the first sidewall 263 can be equal to the slope angle of the third sidewall 133.

[0147] In one example, the angular difference between the slope angles of the first sidewall 263 and the third sidewall 133 can be 0 degree to 3 degrees. Thereby, the slope angles between the first sidewall 263 and the third sidewall 133 can be smoothly transitioned, the divergence of the reflected light of the sidewalls of the first opening 31 can be reduced, and the diffraction effect can be further improved.

[0148] In one embodiment, please refer to FIG. 2- Figure 7 As shown, the light-emitting element is located in the first opening 31, and includes a light-emitting layer 28 and a second electrode layer 14 located on the side of the light-emitting layer 28 away from the substrate 11. Among them, the orthographic projection of the second electrode layer 14 on the substrate 11 can entirely cover the substrate 11.

[0149] Among them, the distance h2 from the surface of the cushion layer 29 on the side away from the substrate 11 to the substrate 11 is greater than the distance from the surface of the light-emitting layer 28 on the side away from the substrate 11 to the substrate 11.

[0150] In this embodiment, the distance from the surface of the cushion layer 29 on the side away from the substrate 11 to the substrate 11 is greater than the distance from the surface of the light-emitting layer 28 on the side away from the substrate 11 to the substrate 11.

[0151] Among them, the distance from the surface of the cushion layer 29 on the side away from the substrate 11 to the substrate 11 may refer to: the maximum vertical distance from the surface of the cushion layer 29 on the side away from the substrate 11 to the substrate 11; the distance from the surface of the light-emitting layer 28 on the side away from the substrate 11 to the substrate 11 may refer to: the maximum vertical distance from the surface of the light-emitting layer 28 on the side away from the substrate 11 to the substrate 11.

[0152] In this way, the sidewall of the spacer layer 29 is in direct contact with the light-emitting layer 28, and the height of the sidewall of the spacer layer 29 is greater than the thickness of the light-emitting layer 28. Thus, when the light-emitting element emits light, the sidewall of the spacer layer 29 can reflect the light emitted by the light-emitting layer 28, and the reflected light can be emitted outwards through the first opening 31, thereby improving the light extraction efficiency of the light-emitting element.

[0153] Among them, the second electrode layer 14 can entirely cover the pixel defining layer 13, and the second electrode layer 14 can be formed of a light-transmissive conductive material.

[0154] In an exemplary embodiment, as shown in FIG. 2- Figure 7 As shown, the display panel may further include a light-shielding layer 23 and a color conversion layer 24 on a side of the light-emitting element away from the substrate 11. The light-shielding layer 23 may include a second opening 32 corresponding to the first opening 31, and the color conversion layer 24 is located at the second opening 32.

[0155] Among them, as shown in FIG. 2- Figure 7 As shown, the orthographic projection of the color conversion layer 24 on the substrate 11 and the orthographic projection of the light-emitting layer 28 on the substrate 11 at least partially overlap. For example, the orthographic projection of the color conversion layer 24 on the substrate 11 may cover the orthographic projection of the light-emitting layer 28 on the substrate 11. To ensure the aperture ratio, the orthographic projection of the second opening 32 on the substrate 11 may cover the orthographic projection of the first opening 31 on the substrate 11.

[0156] In this embodiment, the light-emitting colors of all the light-emitting elements may be the same. For example, all the light-emitting devices emit blue light; or for another example, all the light-emitting devices emit white light.

[0157] Among them, the color conversion layer 24 may be a color filter, such as including a red color filter, a green color filter, and a blue color filter; or for another example, the color conversion layer 24 may include quantum dot layers (QD Film) of different colors, such as a red quantum dot layer, a green quantum dot layer, and a white resin layer. For example, the blue light emitted by the light-emitting element emits red light after passing through the red quantum dot layer, emits green light after passing through the green quantum dot layer, and emits blue light after passing through the white resin layer, thereby realizing color display.

[0158] Of course, in some other examples, multiple light-emitting elements may include a green light-emitting element that emits green light, a red light-emitting element that emits red light, and a blue light-emitting element that emits blue light. Among them, the color conversion layer 24 may include a green color film corresponding to the green light-emitting element, a red color film corresponding to the red light-emitting element, and a blue color film corresponding to the blue light-emitting element. Through the color conversion layer 24, the quality of the light-emitting color of the display panel can be ensured.

[0159] In some examples, such as Figures 2a - 7As shown, between the light-emitting element and the light-shielding layer 23, there may further be included a first encapsulation layer 15, a second encapsulation layer 16 located on the side of the first encapsulation layer 15 away from the substrate 11, a third encapsulation layer 17 located on the side of the protective layer away from the substrate 11, a film buffer layer 18 located on the side of the third encapsulation layer 17 away from the substrate 11, a first metal layer 19 located on the side of the TBL layer 18 away from the substrate 11, an insulating layer 20 located on the side of the first metal layer 19 away from the substrate 11, a second metal layer 21 located on the side of the insulating layer 20 away from the substrate 11, an organic layer 22 located on the side of the second metal layer away from the substrate, and the light-shielding layer 23 and the color conversion layer 24 are located on the side of the organic layer 22 away from the substrate 11.

[0160] Wherein, in some examples, on the side of the pixel defining layer 13 away from the substrate 11, there is further included a support post 27, and the second electrode layer 14 may be located on the side of the support post 27 away from the substrate 11. The support post 27 can support the used mask plate when forming the light-emitting layer 28. After forming the light-emitting layer 28, the support post 27 can be removed, or not removed. In the case of not being removed, the second electrode layer 14 is formed on the side of the support post 27 away from the substrate 11.

[0161] In an exemplary embodiment, as Figure 13 shown and Figure 14 shown, the orthographic projection of the pixel defining layer 13 on the substrate 11 may cover the orthographic projection of the light-shielding layer 23 on the substrate 11. Thus, the area of the second opening of the light-shielding layer 23 may be larger than the area of the first opening, thereby increasing the light-emitting area of the light emitted by the light-emitting element, and thus improving the light-emitting efficiency of the display panel.

[0162] In some embodiments, as Figure 5 and Figure 7 shown, the orthographic projection of the light-shielding layer 23 on the substrate 11 may have no overlap with the orthographic projection of the pad layer 29 on the substrate 11. Thus, the opening area of the second opening 32 can be increased, thereby increasing the light-transmitting area and improving the light-emitting efficiency. In this example, if the surface on the side of the pixel defining layer 13 away from the substrate 11 is flat, then the surface of the second electrode layer 14 formed on the side of the pixel defining layer 13 away from the substrate 11 is flat, and the reflection of the second electrode layer 14 on external light is uniform. In this way, the aperture ratio can be increased through the above setting of the light-shielding layer.

[0163] In some embodiments, as Figure 4 and Figure 6As shown, the orthographic projection of the light-shielding layer 23 on the substrate 11 may overlap with the orthographic projection of the pad layer 29 on the substrate 11. Thus, the shielding effect on the external light reflected by the recess can be increased, and the display quality in the dark state can be improved. In this example, if the surface on the side of the pixel defining layer 13 away from the substrate 11 is recessed toward the substrate 11, the surface of the second electrode layer 14 formed on the side of the pixel defining layer 13 away from the substrate 11 is also recessed toward the substrate 11. In this way, the second electrode layer 14 reflects external light in the recessed area. Thus, through the overlap between the light-shielding layer 23 and the pad layer 29, the light-shielding layer 23 can block the external light reflected by the recess, and the generation of reflection apertures can be further avoided.

[0164] In the above embodiment, the surface of the pixel defining layer 13 on the side away from the substrate 11 may be substantially flat. For example, the difference between the vertical distances from different positions on the surface of the pixel defining layer 13 on the side away from the substrate 11 to the substrate may be less than a preset value, and the preset value may be 1 / 50 - 1 / 20 of the maximum vertical distance from the surface of the pixel defining layer 13 on the side away from the substrate 11 to the substrate.

[0165] In an example of this embodiment, as shown in 4- Figure 7 , Figures 13 - 14 As shown, the pad layer 29 includes a first boundary 291 near one side of the first opening 31, the light-shielding layer 23 includes a second boundary 231 near the second opening 32, and the distance between the orthographic projections of the first boundary 291 and the second boundary 231 on the substrate 11 is less than or equal to 6 μm.

[0166] In one example, as shown in Figure 5 and Figure 7 and Figure 13 As shown, the orthographic projection of the light-shielding layer 23 on the substrate 11 does not overlap with the orthographic projection of the pad layer 29 on the substrate 11. In this case, the second boundary 231 is located outside the orthographic projection of the pad layer 29, and the distance between the two may be less than or equal to 6 μm and greater than the size of the pad layer 29 in the target direction.

[0167] In one example, as shown in Figure 4 , Figure 6 and Figure 14 As shown, the orthographic projection of the light-shielding layer 23 on the substrate 11 overlaps with the orthographic projection of the pad layer 29 on the substrate 11. In this case, the second boundary 231 is located within the orthographic projection of the pad layer 29, and the distance between the two may be less than or equal to 6 μm and less than the size of the pad layer 29 in the target direction.

[0168] Among them, the target direction refers to the arrangement direction of the first opening 31 and the pad layer 29, as shown in Figure 2- Figure 7in the x direction.

[0169] In an example of this embodiment, the size of the cushion layer 29 in the target direction is less than or equal to 6 μm, that is, the distance between the first boundary 291 and the third boundary 292 of the cushion layer 29 is less than or equal to 6 μm.

[0170] As Figure 4 and Figure 6 shown, the size of the cushion layer 29 in the target direction may refer to the sizes of regions a, b, and c in the figure. As Figure 5 and Figure 7 shown, the size of the cushion layer 29 in the target direction may refer to the sizes of regions a and b in the figure.

[0171] Among them, region a is the region between the first boundary 291 of the cushion layer 29 and the fourth boundary 131 of the pixel defining layer 13, region b is the region between the fourth boundary 131 of the pixel defining layer 13 and the second boundary 231 of the light shielding layer 23, and region c is the region between the second boundary 231 of the light shielding layer 23 and the second boundary 292 of the cushion layer 29.

[0172] In this example, the difference between the distance between the orthographic projections of the first boundary 291 and the second boundary 231 on the substrate 11 and the size of the cushion layer 29 in the target direction may be less than the size of the cushion layer 29 in the target direction.

[0173] Exemplarily, as Figure 5 , Figure 7 and Figure 13 shown, the orthographic projection of the light shielding layer 23 on the substrate 11 does not overlap with the orthographic projection of the cushion layer 29 on the substrate 11. The second boundary 231 is located outside the orthographic projection of the cushion layer 29, and the distance between them may be less than or equal to 6 μm and greater than the size of the cushion layer 29 in the target direction. For example, the distance between the first boundary 291 and the second boundary 231 may be 6 μm, and the size of the cushion layer 29 in the target direction may be 5 μm.

[0174] Again exemplarily, as Figure 4 , Figure 6 and Figure 14 shown, Figure 14 shows a plan view of the light shielding layer 23, the pixel defining layer 13, and the first electrode layer 26. The orthographic projection of the light shielding layer 23 on the substrate 11 overlaps with the orthographic projection of the cushion layer 29 on the substrate 11. The second boundary 231 is located within the orthographic projection of the cushion layer 29, and the distance between them may be 5 μm. The size of the cushion layer 29 in the target direction may be 6 μm.

[0175] In an example of this embodiment, the spacer layer 29 includes a third boundary 292 away from the first electrode region 26a, the light-shielding layer 23 includes a second boundary 231 near the second opening 32, and the distance between the orthographic projections of the third boundary 292 and the second boundary 231 on the substrate 11 is 0.5 μm to 4 μm.

[0176] Exemplarily, as Figure 5 , Figure 7 and Figure 13 shown, the orthographic projection of the light-shielding layer 23 on the substrate 11 does not overlap with the orthographic projection of the spacer layer 29 on the substrate 11. The second boundary 231 is located outside the orthographic projection of the spacer layer 29. The third boundary 292 is the side boundary of the spacer layer 29 facing away from the first opening 31, and the second boundary 231 is located on the side of the third boundary 292 facing away from the first opening 31. Among them, the distance c between the third boundary 292 and the second boundary 231 can be 0.5 μm, 1 μm, 2 μm, 3 μm, 3.5 μm, 4 μm.

[0177] Exemplarily, as Figure 4 , Figure 6 and Figure 14 shown, the orthographic projection of the light-shielding layer 23 on the substrate 11 overlaps with the orthographic projection of the spacer layer 29 on the substrate 11. The second boundary 231 is located on the side of the third boundary 292 near the first opening 31. Among them, the distance between the third boundary 292 and the second boundary 231 can be 0.5 μm, 1 μm, 2 μm, 3 μm, 3.5 μm, 4 μm.

[0178] In an example, the situation where the orthographic projection of the light-shielding layer 23 on the substrate 11 overlaps with the orthographic projection of the spacer layer 29 on the substrate 11 is called the first situation, and the situation where the orthographic projection of the light-shielding layer 23 on the substrate 11 does not overlap with the orthographic projection of the spacer layer 29 on the substrate 11 is called the second situation. Among them, in the first situation, the distance between the third boundary 292 and the second boundary 231 can be less than the distance between the third boundary 292 and the second boundary 231 in the second situation. In this way, while ensuring that the light-shielding layer 23 blocks the reflected light of the second electrode layer 14 to external light, the light-emitting area of the light-emitting element can be ensured as much as possible, and the light extraction efficiency can be ensured.

[0179] Of course, the above size values are only for exemplary illustration and do not represent a limitation to this application.

[0180] Next, the morphology of the first electrode layer 26 will be exemplarily described. It should be noted that the thickness of the first electrode region 26a in the first electrode layer 26 with the following morphology is less than the thickness of the second electrode region 26b. The second electrode region 26b can be used as the spacer layer 29, or a spacer layer 29 can be further provided on the side of the second electrode region 26b facing away from the substrate 11.

[0181] In one embodiment, as Figure 2a , Figure 6 shown, the first electrode layer 26 may include a first sub - electrode 261 and a second sub - electrode 262. Among them, the first sub - electrode 261 includes a part located in the first electrode region 26a and a part located in the second electrode region 26b. The second sub - electrode 262 is located in the second electrode region 26b. In the second electrode region 26b, the first sub - electrode 261 and the second sub - electrode 262 are stacked in the thickness direction y of the substrate 11.

[0182] Among them, in the second electrode region 26b, the orthographic projection of the first sub - electrode 261 on the substrate 11 overlaps with the orthographic projection of the second sub - electrode 262 on the substrate 11. For example, as Figure 6 and Figure 8 shown, in the second electrode region 26b, the orthographic projection of the first sub - electrode 261 on the substrate 11 may cover the orthographic projection of the second sub - electrode 262 on the substrate 11. In this case, as Figure 6 shown, the second sub - electrode 262 may be located on the side of the first sub - electrode 261 away from the substrate 11. Or, as Figure 11 shown, the second sub - electrode 262 is located on the side of the first sub - electrode 261 close to the substrate 11.

[0183] In this embodiment, the first electrode layer 26 can increase the thickness of the peripheral region through the second sub - electrode 262.

[0184] In an exemplary embodiment, both the first sub - electrode 261 and the second sub - electrode 262 may be single - film - layer structures, or the first sub - electrode 261 is a multi - film - layer structure and the second sub - electrode 262 is a single - film - layer structure; or the first sub - electrode 261 is a single - film - layer structure and the second sub - electrode 262 is a multi - film - layer structure; or both the first sub - electrode 261 and the second sub - electrode 262 are multi - film - layer structures.

[0185] Among them, the single - film - layer structure refers to a structure that only contains one layer of conductive material, and the multi - film - layer structure refers to a film - layer structure that contains at least two layers of conductive materials and the types of the multiple layers of conductive materials are not completely the same.

[0186] Among them, in the case where both the first sub - electrode 261 and the second sub - electrode 262 are multi - film - layer structures, the first sub - electrode 261 and the second sub - electrode 262 may include the same film - layer structure.

[0187] Exemplarily, as Figure 8As shown, the first sub-electrode 261 may include a first conductive material 601, a second conductive material 602, and a third conductive material 603 stacked in the thickness direction y of the substrate 11, and the second sub-electrode 262 may include a fourth conductive material 604, a fifth conductive material 605, and a sixth conductive material 606 stacked in the thickness direction y of the substrate 11, with the fourth conductive material 604 located between the fifth conductive material 605 and the sixth conductive material 606;

[0188] Among them, the first conductive material 601 and the fifth conductive material 605 are made of the same material, the second conductive material 602 and the fourth conductive material 604 are made of the same material, and the third conductive material 603 and the sixth conductive material 606 are made of the same material.

[0189] In this example, if the fifth conductive material 605 and the sixth conductive material 606 include a transparent conductive material, then the first conductive material 601 and the third conductive material 603 may include a transparent conductive material, and the second conductive material 602 and the fourth conductive material 604 may include a metal material.

[0190] In this example, the first conductive material 601 and the fifth conductive material 605 have the same thickness, the thickness of the second conductive material 602 may be less than the thickness of the fourth conductive material 604, and the thickness of the third conductive material 603 may be the same as the thickness of the sixth conductive material 606.

[0191] Among them, the thickness of the fifth conductive material 605 and the thickness of the sixth conductive material 606 may be less than the thickness of the fourth conductive material 604.

[0192] In an exemplary embodiment, as Figures 9 - 11 shown, the first sub-electrode 261 and the second sub-electrode 262 may include different film layer structures. For example, as Figure 9 and Figure 11 shown, the first sub-electrode 261 may include a first conductive material 601, a second conductive material 602, and a third conductive material 603 stacked in the thickness direction y of the substrate 11, and the second sub-electrode 262 may include a single metal conductive layer, such as the fourth conductive material 604.

[0193] Again, for example, as Figure 10 shown, the first sub-electrode 261 may include a first conductive material 601, a second conductive material 602, and a third conductive material 603 stacked in the thickness direction y of the substrate 11, and the second sub-electrode 262 may include two conductive layers, namely the fourth conductive material 604 and the fifth conductive material 605.

[0194] Exemplarily, as Figures 8 - 11 shown, the first sub-electrode 261 may be a multi-film layer structure, including a transparent conductive material and a metal conductive material, and the second sub-electrode 262 may be a single-film layer structure or a multi-film layer structure, and the second sub-electrode 262 includes a metal conductive material.

[0195] Exemplarily, as Figure 9 and Figure 11 shown, the first sub - electrode 261 includes a first conductive material 601, a second conductive material 602, and a third conductive material 603 stacked in the thickness direction y of the substrate 11, and the second sub - electrode 262 includes a fourth conductive material 604;

[0196] Among them, the first conductive material 601 and the third conductive material 603 include a light - transmissive conductive material, and the second conductive material 602 and the fourth conductive material 604 include a metal material. In this way, the first sub - electrode 261 at the first opening 31 is composed of a composite of a light - transmissive conductive material and a metal material, and the second sub - electrode 262 can be formed of a metal material to improve the reflection of the light emitted by the light - emitting layer 28 and increase the light extraction efficiency.

[0197] Among them, the second conductive material 602 and the fourth conductive material 604 can be different metal materials or the same metal materials.

[0198] Among them, the materials of the first conductive material 601 and the third conductive material 603 can be the same or different.

[0199] Among them, the thickness of the second conductive material 602 can be less than the thickness of the fourth conductive material 604, so as to raise the peripheral height of the first electrode layer 26 through the fourth conductive material 604.

[0200] In an exemplary embodiment, the second sub - electrode 262 can also include a light - transmissive conductive material. As Figure 10 shown, the second sub - electrode 262 can further include a fifth conductive material 605, and the fourth conductive material 604 and the fifth conductive material 605 can be stacked in the thickness direction y of the substrate 11.

[0201] Among them, the fifth conductive material 605 includes a light - transmissive conductive material, and the second sub - electrode 262 is located between the first conductive material 601 and the second conductive material 602 of the first sub - electrode 261.

[0202] In this way, the film layer in the direction of the vertical distance h2 from the side of the spacer layer 29 away from the substrate to the substrate can be a film layer structure in which a light - transmissive conductive material and a metal are alternately arranged, that is, in each adjacent two conductive materials in the second electrode region 26b, one conductive material is a metal material and the other conductive material is a light - transmissive conductive material.

[0203] Similarly, in each adjacent two conductive materials in the first sub - electrode 261, one conductive material is a metal material and the other conductive material is a light - transmissive conductive material.

[0204] In the above - mentioned embodiments, the metal material can include metal materials such as silver, copper, and gold.

[0205] In the above embodiments, the light-transmissive conductive material may be a metal oxide material, such as indium tin oxide material.

[0206] In some embodiments, such as Figure 8 and Figure 9 shown, in the second electrode region 26b, the second sub-electrode 262 may be located on the side of the first sub-electrode 261 away from the substrate 11; or, as Figure 11 shown, the second sub-electrode 262 may be located on the side of the first sub-electrode 261 close to the substrate 11.

[0207] Based on the same inventive concept, the embodiments of the present disclosure also provide a display device, which may include Figures 1 - 14 any one of the above-mentioned display panels.

[0208] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference may be made to each other.

[0209] Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the said element.

[0210] The above has introduced in detail a display panel and a display device provided by the present disclosure. Specific examples are used in this article to elaborate on the principle and implementation manner of the present disclosure. The description of the above embodiments is only used to help understand the method and its core idea of the present disclosure; at the same time, for those of ordinary skill in the art, according to the idea of the present disclosure, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present disclosure.

[0211] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0212] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

[0213] As used herein, the terms "one embodiment", "an embodiment", or "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. In addition, it should be noted that the examples of the phrase "in one embodiment" herein do not necessarily all refer to the same embodiment.

[0214] In the specification provided herein, a number of specific details are set forth. However, it can be understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0215] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim listing several devices, several of these devices may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

[0216] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not intended to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A display panel, characterized in that: include: substrate substrate; A flat layer, located on one side of the substrate; A pixel defining layer, located on a side of the planar layer away from the substrate, comprising a plurality of spaced-apart first openings; a cushioning layer, located on a side of the pixel defining layer close to the flat layer, the orthographic projection of the cushioning layer on the base substrate being located in a peripheral area of ​​the orthographic projection of the first opening on the base substrate, and the orthographic projection of the cushioning layer on the base substrate overlapping with the orthographic projection of the pixel defining layer on the base substrate; The pixel defining layer includes a first portion and a second portion, wherein the orthographic projection of the first portion on the base substrate is located within the orthographic projection of a surface of the elevating layer away from the base substrate on the base substrate, and the second portion is located on a side of the elevating layer away from the first opening; Wherein, the thickness of the first portion is smaller than the thickness of the second portion.

2. The display panel according to claim 1, characterized in that: The display panel further includes a first electrode layer, the first electrode layer includes a first electrode region and a second electrode region located around the first electrode region, and an orthographic projection of the first electrode region on the base substrate overlaps with an orthographic projection of the first opening on the base substrate; The thickness of the second electrode region is greater than that of the first electrode region, and the padding layer includes the second electrode region; and / or the padding layer is located on a side of the second electrode region away from the base substrate.

3. The display panel according to claim 1 or 2, characterized in that: The material of the cushioning layer includes polystyrene plastics.

4. The display panel according to claim 1 or 2, characterized in that: The thickness of the first portion is 10% to 60% of the thickness of the second portion.

5. The display panel according to claim 1 or 2, characterized in that: The thickness of the first portion is smaller than the maximum thickness of the raising layer.

6. The display panel according to claim 1 or 2, characterized in that: The thickness of the first portion is 0.7-0.9 μm, and the thickness of the second portion is 0.9 μm-1.5 μm.

7. The display panel according to claim 1 or 2, characterized in that: The elevation layer comprises a surface facing away from the substrate, and a first side wall and a second side wall connected to the surface, wherein the first side wall is close to the first opening; The slope angle of the first side wall is 45-80°, and the slope angle of the side wall of the first part close to the first opening is 45-80°.

8. The display panel according to claim 1 or 2, characterized in that: The elevation layer includes a surface facing away from the substrate, and a first side wall and a second side wall connected to the surface, wherein the first side wall is close to the first opening, and the second side wall faces away from the first opening; The pixel defining layer does not include a portion located on the first side wall.

9. The display panel according to claim 8, characterized in that: The pixel defining layer is close to the boundary of the first opening in the orthographic projection on the base substrate, and the surface of the elevation layer on the side away from the base substrate is within the orthographic projection on the base substrate.

10. The display panel according to any one of claims 1 or 2, 4-9, characterized in that: The display panel further includes a light emitting element, and the light emitting element includes: A first electrode layer, located at one side of the base substrate, comprises first electrode regions corresponding to the plurality of first openings respectively, wherein an orthographic projection of the first electrode region on the base substrate overlaps an orthographic projection of the first opening on the base substrate; A light-emitting layer, located on a side of the first electrode layer away from the substrate; A second electrode layer is located on a side of the light-emitting layer away from the base substrate; The light shielding layer is located on a side of the second electrode layer away from the base substrate, and the light shielding layer includes a second opening corresponding to the first opening.

11. The display panel according to claim 10, characterized in that: The orthographic projection of the light shielding layer on the base substrate is located within the orthographic projection of the pixel defining layer on the base substrate.

12. The display panel according to claim 10, characterized in that: The orthographic projection of the light-shielding layer on the base substrate has no overlap with the orthographic projection of the raising layer on the base substrate; or, the orthographic projection of the light-shielding layer on the base substrate partially overlaps with the orthographic projection of the raising layer on the base substrate.

13. The display panel according to claim 10, characterized in that: The elevation layer includes a first boundary close to the first opening, the light shielding layer includes a second boundary close to the second opening, and a distance between orthographic projections of the first boundary and the second boundary on the base substrate is less than or equal to 6 μm.

14. The display panel according to claim 10, characterized in that: The elevation layer includes a third boundary away from the first opening, the light shielding layer includes a second boundary close to the second opening, and a distance between orthographic projections of the third boundary and the second boundary on the base substrate is 0.5 μm to 4 μm.

15. The display panel according to claim 1, characterized in that: In a direction from the raising layer to the first opening, a size of the raising layer is less than or equal to 6 μm.

16. A display device, characterized in that: Comprising the display panel described in any one of claims 1-15.

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