Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises an array substrate; the pixel limiting layer is arranged on the array substrate and defines pixel openings; the display layer comprises a light-emitting unit, and at least part of the light-emitting unit is exposed through the pixel opening; the packaging layer covers the pixel limiting layer and the display layer; the packaging layer comprises a first inorganic packaging layer, an organic packaging layer and a second inorganic packaging layer which are stacked in sequence; the organic packaging layer is located on the side, away from the array substrate, of the first inorganic packaging layer; the light extraction structure is arranged between the first inorganic packaging layer and the organic packaging layer and is used for improving the light extraction efficiency; and the orthographic projection of the light extraction structure on the array substrate and the orthographic projection of the pixel opening on the array substrate at least partially coincide. The light emitting efficiency of the display panel is high. And the thickness of the organic packaging layer can be correspondingly reduced, and the method can be applied to ultra-thin display.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Liquid Crystal Display (LCD) and Organic Light Emitting Diode (OLED) are the two mainstream display methods. Compared with LCD screens, OLED screens have the characteristics of simple structure, low power consumption, high contrast, thin thickness, bright colors, wide viewing angle, fast response speed, and wide operating temperature range. They are now widely used in commercial fields, communications fields, computer fields, consumer electronics fields, and industrial and transportation fields. However, the existing OLED has low light extraction efficiency. Summary of the invention

[0003] The present application provides a display panel and a display device, aiming to solve the problem of low light extraction efficiency of existing OLEDs.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a display panel, which includes: an array substrate, a pixel defining layer, a display layer, an encapsulation layer and a light extraction structure; the pixel defining layer is arranged on the array substrate and defines a pixel opening; the display layer includes a light-emitting unit, at least part of which is exposed through the pixel opening; the encapsulation layer covers the pixel defining layer and the display layer; and the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer stacked in sequence; the organic encapsulation layer is located on the side of the first inorganic encapsulation layer away from the array substrate; the light extraction structure is arranged between the first inorganic encapsulation layer and the organic encapsulation layer to improve the light extraction efficiency; and the orthographic projection of the light extraction structure on the array substrate at least partially overlaps with the orthographic projection of the pixel opening on the array substrate.

[0005] In one embodiment of the present application, the refractive index of the light extraction structure is greater than the refractive index of the organic encapsulation layer.

[0006] In one embodiment of the present application, the width of the vertical cross section of the light extraction structure gradually decreases in a direction away from the array substrate;

[0007] Preferably, the vertical cross-section of the light extraction structure is triangular, semi-elliptical or semi-circular.

[0008] In one embodiment of the present application, the orthographic projection of the light extraction structure on the array substrate is located within the range of the orthographic projection of the pixel opening on the array substrate;

[0009] Preferably, an area of ​​an orthographic projection of the light extraction structure on the array substrate is the same as an area of ​​an orthographic projection of the pixel opening on the array substrate.

[0010] In one embodiment of the present application, the organic encapsulation layer covers the light extraction structure and planarizes a surface of a side of the light extraction structure that is away from the array substrate.

[0011] In one embodiment of the present application, the maximum thickness of the light extraction structure is 3 μm-5 μm;

[0012] The thickness of the organic encapsulation layer is 11 μm-17 μm.

[0013] In one embodiment of the present application, it also includes:

[0014] A conductive layer, disposed on a surface of the packaging layer facing away from the array substrate;

[0015] A protective layer, disposed on a surface of the packaging layer facing away from the array substrate, covers the conductive layer, and flattens a surface of the conductive layer facing away from the packaging layer;

[0016] Preferably, the refractive index of the protective layer is smaller than the refractive index of the light extraction structure.

[0017] In one embodiment of the present application, the protective layer covers the entire surface of the encapsulation layer; or

[0018] The protection layer has a plurality of light outlets; the orthographic projections of the light outlets on the array substrate cover the orthographic projections of the pixel openings on the array substrate.

[0019] In one embodiment of the present application, one light extraction structure is disposed corresponding to each pixel opening.

[0020] In order to solve the above technical problem, another technical solution adopted by the present application is: to provide a display device, which includes the display panel involved above.

[0021] Beneficial effects of the embodiments of the present application: Different from the prior art, the display panel includes an array substrate, a pixel defining layer, a display layer, an encapsulation layer and a light extraction structure; the pixel defining layer is arranged on the array substrate and defines a pixel opening; the display layer includes a light emitting unit, at least part of which is exposed through the pixel opening; the encapsulation layer covers the pixel defining layer and the display layer; and the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer stacked in sequence; the organic encapsulation layer is located on the side of the first inorganic encapsulation layer away from the array substrate; the light extraction structure is arranged between the first inorganic encapsulation layer and the organic encapsulation layer to improve the light extraction efficiency; and the orthographic projection of the light extraction structure on the array substrate at least partially overlaps with the orthographic projection of the pixel opening on the array substrate. In the display panel, the light emitted from the display layer is first modulated by the light extraction structure and then emitted from the organic encapsulation layer and the second organic encapsulation layer of the encapsulation layer. The light emitted from the display layer has a shorter optical path to the light extraction structure, thereby effectively improving the light extraction efficiency of the display layer, and improving the light extraction color gamut and display quality. At the same time, the light extraction structure is arranged between the first inorganic encapsulation layer and the organic encapsulation layer. The light extraction structure can assist the organic encapsulation layer to play a certain filling role, thereby reducing the thickness of the organic encapsulation layer accordingly, so that the display panel can be applied to ultra-thin display and avoid affecting the display and touch effects of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0023] Figure 1 A simplified cross-sectional structural diagram of a display panel provided in one embodiment of the present application;

[0024] Figure 2 for Figure 1 A schematic diagram of the specific structure of the display panel shown;

[0025] Figure 3 A schematic diagram of the position of a light extraction structure and a pixel opening provided in an embodiment of the present application;

[0026] Figure 4 and Figure 5 A schematic diagram of a cross-sectional structure of a display panel provided in different embodiments of the present application;

[0027] Figure 6 A cross-sectional structural diagram of a display panel provided in another embodiment of the present application;

[0028] Figure 7A cross-sectional structural diagram of a display panel provided in yet another embodiment of the present application;

[0029] Figure 8 A simplified structural diagram of a display device provided in one embodiment of the present application.

[0030] Description of Reference Numerals

[0031] 10-display panel; 1-array substrate; 11-substrate; 12-thin film transistor; 2-pixel defining layer; 21-pixel opening; 3-light-emitting unit; 31-anode; 32-light-emitting layer; 33-cathode; 4-encapsulation layer; 41-first inorganic encapsulation layer; 42-organic encapsulation layer; 43-second inorganic encapsulation layer; 5-light extraction structure; 6-conductive layer; 7-protective layer; 71-light outlet. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0036] See also Figures 1 to 3 , Figure 1 A simplified cross-sectional structural diagram of a display panel provided in one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of the specific structure of the display panel shown; Figure 3 A schematic diagram of the position of a light extraction structure and a pixel opening provided in an embodiment of the present application. In this embodiment, a display panel 10 is provided, which includes an array substrate 1, a pixel defining layer 2, a display layer, an encapsulation layer 4 and a light extraction structure 5.

[0037] The array substrate 1 may be a thin film transistor substrate. The thin film transistor substrate includes a substrate 11 and a plurality of thin film transistors 12 (Thin Film Transistor, TFT) disposed on the substrate 11. The periphery of the thin film transistor 12, that is, the non-display area, is also provided with thin film transistor peripheral wiring. The substrate 11 may be formed of any suitable insulating material with flexibility, for example, may be formed of polymer materials such as polyimide (PI), polycarbonate (PC), polyether sulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyarylate (PAR) or glass fiber reinforced plastic (FRP). Of course, the substrate 11 may also be a rigid substrate. When the substrate 11 is a rigid substrate, its material may be glass or metal. The substrate 11 may be transparent, translucent or opaque.

[0038] See also Figure 2 The thin film transistor 12 includes a gate, a source, a drain, and an active layer. A gate insulating layer may be provided between the active layer and the gate, an interlayer insulating layer may be provided between the gate and the source and the drain, a passivation layer may be provided on the side of the source and the drain away from the gate, and a planarization layer may be provided on the side of the passivation layer away from the source and the drain, wherein the planarization layer may be an organic encapsulation layer such as acrylic, polyimide or benzocyclopentene.

[0039] The pixel defining layer 2 (PDL) can be formed on one side of the array substrate 1 by evaporation or deposition of organic materials such as polyimide (PI), polyamide, benzocyclopentene (BCB), acrylic resin or phenolic resin. In one embodiment, the material of the pixel defining layer 2 includes a light absorbing material, which can prevent the light emitted by two adjacent light emitting units 3 from crosstalk. In a specific embodiment, the pixel defining layer 2 defines a plurality of pixel openings 21; the pixel openings 21 can be square, other rectangular or circular.

[0040] The display layer is disposed on the array substrate 1 and includes a plurality of light-emitting units 3, at least part of which is exposed through the pixel opening 21 for emitting light. One pixel opening 21 may correspond to one light-emitting unit 3. The light-emitting unit 3 specifically includes an anode 31 disposed on the surface of the array substrate 1, and a light-emitting layer 32, a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, and a cathode 33, which are sequentially disposed on the surface of the anode 31 away from the array substrate 1. The light-emitting unit 3 may be an organic light-emitting diode (OLED).

[0041] The number of the light emitting units 3 may be one or more. When the number of the light emitting units 3 is more than one, the light emitting color of some light emitting units 3 is red, the light emitting color of some light emitting units 3 is green, and the light emitting color of some light emitting units 3 is blue. It should be noted that the color of the light emitted by the light emitting unit 3 is not limited to red, green, and blue, but may also be yellow or other colors, which are not limited here.

[0042] The encapsulation layer 4 covers the display layer and the pixel defining layer 2, and is used to prevent oxygen and external water vapor from entering the display layer. The encapsulation layer 4 includes a plurality of inorganic encapsulation layers and at least one organic encapsulation layer arranged in a stacked manner. The at least one organic encapsulation layer is arranged between the plurality of inorganic encapsulation layers, and the plurality of inorganic encapsulation films form a closed space that seals the organic encapsulation layer. It should be understood that the inorganic encapsulation layer can minimize or completely prevent the penetration of moisture, oxygen and / or hydrogen into the array layer and the light-emitting layer 32. Therefore, as an embodiment, the inorganic encapsulation layer and the organic encapsulation layer can be alternately stacked, and the inorganic encapsulation layer can be set as the topmost and bottommost layers of the encapsulation unit. The outermost inorganic encapsulation layer can completely cover the organic encapsulation layer, thereby forming a barrier space that can block the entry of water and oxygen.

[0043] In one application scenario, the encapsulation layer 4 includes a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43. The first inorganic encapsulation layer 41 covers the light-emitting unit 3 and the pixel defining layer 2. The thickness of the first inorganic encapsulation layer 41 may be about 0.8 μm to 1.2 μm. For example, the thickness of the first inorganic encapsulation layer 41 may be about 1.0 μm.

[0044] The organic encapsulation layer 42 may be disposed on a surface of the first inorganic encapsulation layer 41 facing away from the array substrate 1 ; and the organic encapsulation layer 42 may have a sufficiently large thickness (eg, may have a thickness of approximately 30,000 angstroms) to planarize the steps formed by the pixel defining layer 2 .

[0045] The organic encapsulation layer 42 may include at least one of epoxy resin, acrylate and polyurethane acrylate. At least part of the second inorganic encapsulation layer 43 is disposed on a surface of the organic encapsulation layer 42 facing away from the first inorganic encapsulation layer 41. The material of the first inorganic encapsulation layer 41 and / or the second inorganic encapsulation layer 43 may specifically include an inorganic material, such as a silicon nitride layer (SiN). The material of the organic encapsulation layer 42 may specifically include an organic material.

[0046] See also Figure 2 and Figure 3 , the light extraction structure 5 is arranged between the first inorganic encapsulation layer 41 and the organic encapsulation layer 42, and the orthographic projection of the light extraction structure 5 on the array substrate 1 at least partially overlaps with the orthographic projection of the pixel opening 21 on the array substrate 1. The light extraction structure 5 is configured to modulate the light emitted from the display layer to effectively improve the light extraction efficiency of the display layer. At the same time, the light extraction structure 5 is arranged between the first inorganic encapsulation layer 41 and the organic encapsulation layer 42; compared with the solution of arranging the light extraction structure 5 between the organic encapsulation layer 42 and the second inorganic encapsulation layer 43, the light extraction structure 5 can assist the organic encapsulation layer 42 to play a certain leveling role, thereby reducing the thickness of the organic encapsulation layer 42 accordingly, so that the display panel 10 can be applied to ultra-thin display, and avoid affecting the display and touch effects of the display panel 10.

[0047] In a specific embodiment, the organic encapsulation layer 42 covers the light extraction structure 5 and flattens the surface of the light extraction structure 5 on one side facing away from the array substrate 1. The maximum thickness of the light extraction structure 5 is 3 μm-5 μm; for example, it can be 3 μm, 4 μm or 5 μm, etc. The thickness of the organic encapsulation layer 42 can be 11 μm-17 μm. For example, it can be 11 μm, 12 μm, 15 μm or 17 μm, etc.

[0048] In some embodiments, the refractive index of the light extraction structure 5 is greater than the refractive index of the organic encapsulation layer 42; and / or the width W of the vertical cross section of the light extraction structure 5 gradually decreases in the direction away from the array substrate 1. In this way, after the light emitted by the light emitting unit 3 is incident on the light extraction structure 5 through the first inorganic encapsulation layer 41, the light can be refracted at the interface between the light extraction structure 5 and the organic encapsulation layer 42, and this scheme can make more light with a small incident angle refracted in the area corresponding to the pixel opening 21 (i.e., the light emitting side of the light emitting unit 3), thereby effectively improving the light extraction efficiency of the light emitting unit 3 and the light emission at a positive viewing angle, thereby improving the efficiency of the OLED device and reducing power consumption. At the same time, the width W of the vertical cross section of the light extraction structure 5 gradually decreases in the direction away from the array substrate 1, so that the light extraction structure 5 itself can play a certain light-gathering role, so that more light is emitted from the light emitting side of the light emitting unit 3, thereby further improving the light extraction efficiency of the light emitting side of the light emitting unit 3 and the light emission at a positive viewing angle. Among them, the positive viewing angle refers to the light emitting surface directly facing the pixel opening 21.

[0049] Specifically, the high-refractive-index light extraction structure 5 forms a structure similar to a convex lens, and combined with the light-gathering structure formed by the low-refractive-index organic encapsulation layer 42, it can not only gather light and improve the light extraction efficiency by about 10%, but also reduce the total thickness of the laminated display panel 10 through the filling effect of the high-refractive-index light extraction structure 5, and can be applied to ultra-thin displays. In addition, the stress and strain of the three-layer structure of the encapsulation layer 4 can be reduced, the product yield can be improved, and the life and reliability of the display panel 10 can be improved.

[0050] Among them, see Figure 4 and Figure 5 , Figure 4 and Figure 5 Schematic diagram of the cross-sectional structure of the display panel provided in different embodiments of the present application; the vertical cross-section of the light extraction structure 5 may be semi-elliptical (eg Figure 1 ), triangle (such as Figure 4 ) or semicircular (such as Figure 5 ). For example, the light extraction structure 5 can be a convex lens structure or a structure similar to a convex lens.

[0051] The refractive index of the light extraction structure 5 may be greater than 1.92. For example, the refractive index of the light extraction structure 5 may be about 2.0. The material of the light extraction structure 5 may include acrylic resin and inorganic particles doped in the acrylic resin; wherein the inorganic particles may be zirconium oxide. The refractive index of the first inorganic encapsulation layer 41, the organic encapsulation layer 42, and the second inorganic encapsulation layer 43 is about 1.5.

[0052] In some embodiments, Figure 1As shown, the orthographic projection of the light extraction structure 5 on the array substrate 1 is within the range of the orthographic projection of the pixel opening 21 on the array substrate 1. Compared with the solution in which the light extraction structure 5 is disposed on the first inorganic encapsulation layer 41 as a whole layer, this solution has a better light focusing effect and can enable more light to be emitted from the orthographic viewing angle. In a specific embodiment, the area of ​​the orthographic projection of the light extraction structure 5 on the array substrate 1 is the same as the area of ​​the orthographic projection of the pixel opening 21 on the array substrate 1.

[0053] See also Figure 6 , Figure 6 A cross-sectional structural diagram of a display panel provided in another embodiment of the present application; in some embodiments, the display panel 10 further includes a conductive layer 6 and a protective layer 7. The conductive layer 6 is disposed on a surface of the packaging layer 4 that faces away from the array substrate 1. The conductive layer 6 may be a metal layer, such as a copper layer. The conductive layer 6 may be used to implement a touch function. The protective layer 7 is disposed on a surface of the packaging layer 4 that faces away from the array substrate 1, and covers the conductive layer 6, and is used to protect and flatten the surface of the conductive layer 6 that faces away from the packaging layer 4. Specifically, the protective layer 7 wraps the circumferential side wall of the conductive layer 6 and the surface of the conductive layer 6 that faces away from the array substrate 1.

[0054] The refractive index of the protective layer 7 is smaller than the refractive index of the light extraction structure 5. Thus, in the process of preparing the protective layer 7, the leveling effect of the protective layer 7 is better, which is conducive to the flattening of the surface of the conductive layer 6. The material of the protective layer 7 can be acrylic resin.

[0055] In some embodiments, the protective layer 7 covers the entire surface of the encapsulation layer 4. In this way, in the process of preparing the protective layer 7, it is not necessary to pattern the protective layer 7, and the leveling effect of the protective layer 7 is better.

[0056] In other embodiments, see Figure 7 , Figure 7 A cross-sectional structural diagram of a display panel provided in another embodiment of the present application; the protective layer 7 has a plurality of light outlets 71; the orthographic projection of the light outlets 71 on the array substrate 1 covers the orthographic projection of the pixel openings 21 on the array substrate 1. In this way, the protective layer 7 can be prevented from affecting the light extraction efficiency of the light emitting unit 3, thereby improving the optical benefit.

[0057] In a specific embodiment, the orthographic projection of the light outlet 71 on the array substrate 1 coincides with the orthographic projection of the pixel opening 21 on the array substrate 1. In this way, the protective layer 7 can be prevented from affecting the light extraction efficiency, and the conductive layer 6 can be protected to the greatest extent.

[0058] In some embodiments, the pixel defining layer 2 defines a plurality of pixel openings 21 , each pixel opening 21 is provided with at least one light emitting unit 3 , and each pixel opening 21 may be provided with a corresponding light extraction structure 5 .

[0059] The display panel 10 provided in this embodiment includes an array substrate 1, a pixel defining layer 2, a display layer, an encapsulation layer 4 and a light extraction structure 5; the pixel defining layer 2 is arranged on the array substrate 1 and defines a pixel opening 21; the display layer includes a light-emitting unit 3, at least part of the light-emitting unit 3 is exposed through the pixel opening 21; the encapsulation layer 4 covers the pixel defining layer 2 and the display layer; and the encapsulation layer 4 includes an inorganic encapsulation layer 4, an organic encapsulation layer 42 and a second inorganic encapsulation layer 43 stacked in sequence; the organic encapsulation layer 42 is located on the side of the first inorganic encapsulation layer 41 away from the array substrate 1; the light extraction structure 5 is arranged between the first inorganic encapsulation layer 41 and the organic encapsulation layer 42, and the orthographic projection of the light extraction structure 5 on the array substrate 1 at least partially overlaps with the orthographic projection of the pixel opening 21 on the array substrate 1. In the display panel 10, the light emitted from the display layer is first modulated by the light extraction structure 5, and then emitted from the organic encapsulation layer 42 and the second organic encapsulation layer 42 of the encapsulation layer 4. The light emitted from the display layer has a shorter optical path to the light extraction structure 5, thereby effectively improving the light extraction efficiency of the display layer, and improving the light extraction color gamut and display quality. At the same time, the light extraction structure 5 is arranged between the first inorganic encapsulation layer 41 and the organic encapsulation layer 42, and the light extraction structure 5 can assist the organic encapsulation layer 42 to play a certain leveling role, thereby correspondingly reducing the thickness of the organic encapsulation layer 42, so that the display panel 10 can be applied to ultra-thin display, and avoid affecting the display and touch effects of the display panel 10.

[0060] See also Figure 8 , Figure 8 A simplified structural diagram of a display device provided in one embodiment of the present application. In this embodiment, a display device is provided, which includes the display panel 10 involved in the above embodiment. The specific structure and function of the display panel 10 can be found in the above related description, which will not be repeated here. The display device can be a product or component with a display function such as a mobile phone, a tablet computer, a laptop computer and a television. The display device also includes a mainboard, a control circuit, etc. These structures are the same or similar to the relevant structures of the existing display device. For details, please refer to the prior art and will not be repeated here.

[0061] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: include: An array substrate; A pixel defining layer is disposed on the array substrate and defines a pixel opening; The display layer includes a light emitting unit, at least a portion of which is exposed through the pixel opening; an encapsulation layer, covering the pixel defining layer and the display layer; and the encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer stacked in sequence; the organic encapsulation layer is located on a side of the first inorganic encapsulation layer away from the array substrate; The light extraction structure is arranged between the first inorganic encapsulation layer and the organic encapsulation layer to improve the light extraction efficiency; and the orthographic projection of the light extraction structure on the array substrate at least partially overlaps with the orthographic projection of the pixel opening on the array substrate.

2. The display panel according to claim 1, characterized in that: The refractive index of the light extraction structure is greater than the refractive index of the organic encapsulation layer.

3. The display panel according to claim 1 or 2, characterized in that: The width of the vertical cross section of the light extraction structure gradually decreases in a direction away from the array substrate; Preferably, the vertical cross-section of the light extraction structure is triangular, semi-elliptical or semi-circular.

4. The display panel according to claim 3, characterized in that: The orthographic projection of the light extraction structure on the array substrate is located within the range of the orthographic projection of the pixel opening on the array substrate; Preferably, an area of ​​an orthographic projection of the light extraction structure on the array substrate is the same as an area of ​​an orthographic projection of the pixel opening on the array substrate.

5. The display panel according to claim 4, characterized in that: The organic encapsulation layer covers the light extraction structure and flattens a surface of the light extraction structure on one side facing away from the array substrate.

6. The display panel according to claim 4, characterized in that: The maximum thickness of the light extraction structure is 3 μm-5 μm; The thickness of the organic encapsulation layer is 11 μm-17 μm.

7. The display panel according to claim 1, characterized in that: Also includes: A conductive layer, disposed on a surface of the packaging layer facing away from the array substrate; A protective layer, disposed on a surface of the packaging layer facing away from the array substrate, covers the conductive layer, and flattens a surface of the conductive layer facing away from the packaging layer; Preferably, the refractive index of the protective layer is smaller than the refractive index of the light extraction structure.

8. The display panel according to claim 7, characterized in that: The protective layer covers the entire surface of the encapsulation layer; or The protection layer has a plurality of light outlets; the orthographic projections of the light outlets on the array substrate cover the orthographic projections of the pixel openings on the array substrate.

9. The display panel according to claim 1, characterized in that: Each of the pixel openings is correspondingly provided with a light extraction structure.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1 to 9.

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