Display panel and display device

Abstract

This application relates to a display panel and a display device. The display panel includes a substrate, a partition structure disposed on one side of the substrate, the partition structure defining a plurality of partition openings; light-emitting units at least partially located within the partition openings; a first encapsulation layer located on the side of the light-emitting units away from the substrate, the first encapsulation layer including a plurality of encapsulation portions corresponding to the light-emitting units, and the encapsulation portions extending from the side of the partition structure to the side of the partition structure away from the substrate; a light extraction layer located on the side of the first encapsulation layer opposite to the substrate; the light extraction layer including a plurality of first light extraction layers and second light extraction layers, the orthographic projection of the encapsulation portions on the substrate being located within the orthographic projection of the first light extraction layers on the substrate; the second light extraction layers located on the side of the first light extraction layers away from the light-emitting units, the refractive index of the first light extraction layers being greater than the refractive index of the second light extraction layers. Therefore, the display panel and display device provided in the embodiments of this application can improve the viewing angle display effect of the display panel and display device.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] Organic Light Emitting Diode (OLED) display technology is considered the most promising next-generation flat panel display technology. Compared to LCD technology, OLED technology has advantages such as low energy consumption, low cost, self-emissiveness, wide viewing angle, and fast response speed. However, current OLED display panels suffer from poor viewing angle performance. Summary of the Invention

[0003] Therefore, it is necessary to provide a display panel and display device that can improve the viewing angle display effect.

[0004] In a first aspect, embodiments of this application provide a display panel, comprising: a substrate; a partition structure disposed on one side of the substrate, the partition structure defining a plurality of partition openings; a plurality of light-emitting units, wherein at least a portion of the light-emitting units are located within the partition openings; a first encapsulation layer located on the side of the light-emitting units away from the substrate, the first encapsulation layer comprising a plurality of encapsulation portions corresponding to the light-emitting units, and the encapsulation portions extending from the side of the partition structure to the side of the partition structure away from the substrate; and a light extraction layer located on the side of the first encapsulation layer opposite to the substrate; wherein the light extraction layer comprises a first light extraction layer and a second light extraction layer, the first light extraction layer comprising a plurality of encapsulation portions, and the orthographic projection of the encapsulation portions on the substrate being located within the orthographic projection of the first light extraction layer on the substrate; the second light extraction layer being located on the side of the first light extraction layer away from the light-emitting units, and the refractive index of the first light extraction layer being greater than the refractive index of the second light extraction layer.

[0005] The display panel provided in this application embodiment, by providing a light extraction layer, allows at least a portion of the light emitted by the light unit to be deflected along the direction from the light-emitting unit to the partition structure after passing through the light extraction layer. This allows the at least a portion of the light to compensate for the light blocked by the partition structure and enter the user's eyes, thereby alleviating the phenomenon of low display brightness when the user views the display panel at a wide viewing angle, and thus improving the viewing angle display effect of the display panel. Furthermore, the orthographic projection of the encapsulation portion on the substrate lies within the orthographic projection of the first light extraction layer on the substrate, thereby expanding the coverage area of ​​the first light extraction layer. This further allows more light emitted by the light-emitting unit to pass through the first light extraction layer, causing more light to pass through the interface and be deflected along the direction from the light-emitting unit to the partition structure, thereby improving the viewing angle display effect of the display panel.

[0006] In one embodiment, the encapsulation portion includes a first extension located on the side of the partition structure away from the substrate;

[0007] Preferably, the material of the first encapsulation layer is an inorganic material.

[0008] In this way, by setting the first extension, it is possible to prevent the packaging part from failing to completely cover the light-emitting unit due to process errors, thereby improving the packaging effect of the packaging part.

[0009] In one embodiment, the extension length of the first extension is greater than or equal to 2 μm.

[0010] This results in a larger extension length for the first extension portion, which is beneficial for further improving the encapsulation effect of the encapsulation portion and also improving the display effect.

[0011] In one embodiment, along the thickness direction of the substrate, there is a gap between the first extension and the side of the partition structure away from the substrate, the first light extraction layer is in contact with the encapsulation portion, and the first light extraction layer is also located in the gap.

[0012] This can alleviate the peeling phenomenon between the first extension and the partition structure.

[0013] In one embodiment, the second light extraction layer is reused as a second encapsulation layer;

[0014] Preferably, the display panel further includes a third encapsulation layer, which is located on the side of the light extraction layer away from the substrate;

[0015] Preferably, the material of the third encapsulation layer is an inorganic material.

[0016] This eliminates the need for a separate second encapsulation layer, which simplifies the manufacturing process and structure of the display panel and facilitates its thinning and lightening.

[0017] In one embodiment, the display panel further includes a second encapsulation layer and a third encapsulation layer, both of which are located on the side of the light extraction layer away from the substrate, with the second encapsulation layer located between the light extraction layer and the third encapsulation layer.

[0018] Preferably, the refractive index of the second encapsulation layer is less than or equal to the refractive index of the second light extraction layer;

[0019] Preferably, the refractive index of the second encapsulation layer is greater than 1.4 and less than or equal to 1.5;

[0020] Preferably, the second encapsulation layer is an organic material;

[0021] Preferably, the material of the third encapsulation layer is an inorganic material.

[0022] In one embodiment, the display panel further includes a second encapsulation layer and a third encapsulation layer, both of which are located on the side of the light extraction layer facing the substrate, with the second encapsulation layer located between the first encapsulation layer and the third encapsulation layer.

[0023] Preferably, the second encapsulation layer is an organic material;

[0024] Preferably, the material of the third encapsulation layer is an inorganic material.

[0025] In one embodiment, along a cross-section parallel to the substrate, the cross-sectional dimensions of the first light extraction layer gradually decrease in the direction from the first light extraction layer to the second light extraction layer.

[0026] This makes it less likely for total internal reflection to occur at the interface, which helps to improve the light output of the display panel.

[0027] In one embodiment, the surface of the first light extraction layer that is attached to the second light extraction layer is an arc surface, and the arc surface protrudes in the direction away from the substrate.

[0028] In this way, because the transition of the curved surface is relatively smooth, the difference in the deflection angle between two adjacent beams of light emitted by the light-emitting unit when passing through the interface is small, which is beneficial to improving the uniformity of display brightness when viewing the display panel at a wide viewing angle.

[0029] In one embodiment, the incident point of the light emitted by the light-emitting unit at the interface and the center of curvature corresponding to the incident point are located on the same side of the center of the light-emitting unit; or, the orthographic projection of the center of curvature corresponding to the incident point of the light emitted by the light-emitting unit at the interface onto the substrate overlaps with the orthographic projection of the center of the light-emitting unit onto the substrate; wherein, the interface is the interface between the first light extraction layer and the second light extraction layer; the center of curvature corresponding to the incident point is located on the side of the light-emitting unit facing the substrate.

[0030] Preferably, the radius of curvature of the incident point of the light emitted by the light-emitting unit at the interface is greater than the maximum distance between the light-emitting layer of the light-emitting unit and the incident point;

[0031] Preferably, the radius of curvature of the incident point of the light emitted by the light-emitting unit at the interface is greater than or equal to 3 μm.

[0032] This results in a larger radius of curvature for the curved surface, making it relatively gentle and flat. This allows the center of the curved surface to be located on the side of the light-emitting layer facing the substrate, so that the light-emitting layer of a light-emitting unit is more located to the left of the normal. The light from the light-emitting layer located to the left of the normal will diffuse towards a wider viewing angle, thus increasing the amount of light diffused over a wider viewing angle and improving the viewing angle range.

[0033] In one embodiment, the refractive index of the first light extraction layer is greater than or equal to 1.5 and less than or equal to 1.8.

[0034] In one embodiment, the refractive index of the second light extraction layer is greater than 1.4 and less than or equal to 1.5.

[0035] In one embodiment, the refractive index of the first encapsulation layer is greater than the refractive index of the first light extraction layer;

[0036] Preferably, the refractive index of the first encapsulation layer is greater than or equal to 1.8 and less than 1.9.

[0037] In one embodiment, at least one of the first light extraction layer and the second light extraction layer is made of an organic material;

[0038] Preferably, both the first light extraction layer and the second light extraction layer are organic materials;

[0039] Preferably, the material of the first light extraction layer is a resin material or polyimide;

[0040] Preferably, the material of the second light extraction layer is a resin material or polyimide.

[0041] In one embodiment, the partition structure includes a blocking portion and a first isolation portion, the first isolation portion being located on the side of the blocking portion facing the substrate, and the outer contour of the orthographic projection of the blocking portion on the substrate being located outside the outer contour of the orthographic projection of the first isolation portion on the substrate.

[0042] Preferably, the light-emitting unit includes a first electrode, a light-emitting layer, and a second electrode arranged sequentially in a direction away from the substrate. The first electrode is disposed on the side of the partition structure facing the substrate, and the light-emitting layer and the second electrode are located inside the partition opening.

[0043] Preferably, the second electrode is electrically connected to the isolation structure.

[0044] In this way, the partition structure can isolate the light-emitting layer during the process of forming the light-emitting unit.

[0045] In one embodiment, the partition structure includes a second isolation portion located on the side of the first isolation portion away from the blocking portion, and the outer contour of the orthographic projection of the second isolation portion on the substrate is located outside the outer contour of the orthographic projection of the first isolation portion on the substrate.

[0046] In this way, by setting up a first isolation part, a second isolation part, and a blocking part in a stacked manner, the resistance of the isolation structure can be reduced, thereby reducing the power consumption of the display panel.

[0047] In one embodiment, the materials of the blocking portion and the first isolation portion include conductive materials;

[0048] Preferably, the material of the first isolation part includes at least one of aluminum, copper, and silver;

[0049] Preferably, the material of the blocking part includes at least one of titanium and molybdenum;

[0050] Preferably, the first isolation portion is electrically connected to the second electrode.

[0051] In one embodiment, the material of the second isolation portion includes a conductive material;

[0052] Preferably, the material of the second isolation portion includes at least one of titanium and molybdenum;

[0053] Preferably, at least one of the first isolation portion and the second isolation portion is electrically connected to the second electrode.

[0054] In one embodiment, the display panel further includes a pixel defining layer located between the partition structure and the substrate. The pixel defining layer defines a plurality of pixel openings, which are correspondingly disposed with a plurality of partition openings. The orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the partition openings on the substrate.

[0055] Secondly, embodiments of this application provide a display device, including the display panel described in the first aspect above.

[0056] The display device provided in this application includes a display panel. By providing a light extraction layer, at least a portion of the light emitted by the light-emitting unit is deflected along the direction from the light-emitting unit to the partition structure after passing through the light extraction layer. This allows the at least a portion of the light to compensate for the light blocked by the partition structure and enter the user's eyes, thereby alleviating the phenomenon of low display brightness when the user views the display panel at a wide viewing angle, and thus improving the viewing angle display effect of the display panel. In addition, the orthographic projection of the encapsulation portion on the substrate is located within the orthographic projection of the first light extraction layer on the substrate, thereby expanding the coverage area of ​​the first light extraction layer. This further allows more light emitted by the light-emitting unit to pass through the first light extraction layer, so that more light passes through the interface and is deflected along the direction from the light-emitting unit to the partition structure, thereby improving the viewing angle display effect of the display panel. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1This is a partial cross-sectional view of a display panel provided in an embodiment of this application.

[0059] Figure 2a Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0060] Figure 2b Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0061] Figure 3 Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0062] Figure 4 This is a partial top view of the partition structure and light-emitting unit provided in the embodiments of this application.

[0063] Figure 5 Another partial cross-sectional view of the display panel provided in an embodiment of this application.

[0064] Explanation of reference numerals in the attached drawings: 100, display panel; 110, substrate; 120, partition structure; 121, first isolation portion; 122, blocking portion; 123, partition opening; 130, light-emitting unit; 131, first electrode; 132, second electrode; 133, light-emitting layer; 140, light extraction layer; 141, first light extraction layer; 142, second light extraction layer; 143, interface; 150, encapsulation layer; 151, first encapsulation layer; 1511, encapsulation portion; 1511a, first extension portion; 152, second encapsulation layer; 153, third encapsulation layer; 160, pixel limiting layer; 171, gap. Detailed Implementation

[0065] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0066] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, this does not indicate any order, quantity, or importance, but is merely used to distinguish different components. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Words such as “comprising” or “including” mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0068] Organic Light Emitting Diode (OLED) display technology is considered the most promising next-generation flat panel display technology. Compared with liquid crystal display technology, OLED display technology has advantages such as low energy consumption, low cost, self-emissiveness, wide viewing angle, and fast response speed.

[0069] In a related OLED display panel, the display panel may include a substrate and a partition structure and multiple light-emitting units disposed on the substrate. The partition structure defines multiple partition openings, and the multiple light-emitting units are correspondingly disposed within the multiple partition openings. The partition structure may include a first partition portion and a blocking portion, and the blocking portion may be located on the side of the first partition portion facing away from the substrate. The outer contour of the orthographic projection of the blocking portion on the substrate is located outside the orthographic projection of the outer contour of the first partition portion on the substrate. For example, the material of the partition structure may include a metallic material.

[0070] However, since the partition structure is made of metal, which is a non-transparent material, when some of the light emitted by the light-emitting unit is directed toward the partition structure, the partition structure will block that part of the light, preventing it from continuing to shine out. This results in a low display brightness when the user views the display panel from a wide viewing angle, leading to a poor viewing angle display effect of the display panel.

[0071] In view of at least one of the above problems, embodiments of this application provide a display panel and a display device that can improve the viewing angle display effect of the display panel and the display device.

[0072] The following will combine Figure 1-Figure 5 The display device provided in the embodiments of this application will be described.

[0073] This application provides a display device including a display panel 100. The display device can be an electronic paper device, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, smart bracelet, smartwatch, supercomputer, navigator, wireless device, personal digital assistant (PDA), handheld or portable computer, GPS receiver / navigator, camera, MP4 video player, camcorder, game console, clock, calculator, television monitor, computer monitor, automotive display (e.g., odometer display), cockpit controller and / or display, camera view display (e.g., display of a rearview camera in a vehicle), electronic billboard or sign, projector, and other mobile or fixed terminals.

[0074] For example, the display panel 100 can be an organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (Micro OLED) display panel, a light-emitting diode (LED) display panel, a quantum dot light-emitting diode (QLED) display panel, a mini light-emitting diode (MiniLED) display panel, a micro light-emitting diode (Micro LED) display panel, or a liquid crystal display (LCD) display panel, etc. This application uses an OLED display panel as an example for illustration.

[0075] See Figure 1The display panel 100 may have a first direction X, a second direction, and a third direction Z, all of which are different. The first direction X and the second direction can be any two different directions parallel to the display panel 100, and the third direction Z can be any direction intersecting a plane parallel to the display panel 100. For example, the first direction X, the second direction, and the third direction Z can be perpendicular to each other. For example, the first direction X can be the width direction of the display panel 100, the second direction can be the length direction of the display panel 100, and the third direction Z can be the thickness direction of the display panel 100. The length, width, and thickness in the embodiments of this application are merely for descriptive convenience and do not imply any limitation on the dimensions. For example, the width can be greater than, equal to, or less than the length. The orientation of the display panel 100 can be consistent with the orientation of the film layers such as the substrate 110.

[0076] The following describes the display panel 100 provided in the embodiments of this application.

[0077] See Figure 1 This application provides a display panel 100, which may include a substrate 110.

[0078] See Figure 1 and Figure 4 The display panel 100 may include a partition structure 120 and light-emitting units 130. The partition structure 120 may be disposed on one side of the substrate 110, and the partition structure 120 may define a partition opening 123. At least a portion of the light-emitting units 130 may be disposed within the partition opening 123. For example, the partition structure 120 may be grid-like in a top view. There may be multiple partition openings 123 and multiple light-emitting units 130, and multiple light-emitting units 130 may be correspondingly disposed within multiple partition openings 123. For example, at least one light-emitting unit 130 may be disposed within one partition opening 123. This application embodiment describes an example where at least a portion of one light-emitting unit 130 may be disposed within one partition opening 123.

[0079] It should be noted that the partition structure 120 can refer to an undercut structure that is larger at the top and smaller at the bottom, capable of separating the light-emitting layers 133 of adjacent light-emitting units 130. The partition structure 120 can be a structure formed by a single film layer or a structure formed by stacking multiple film layers. For example, when the partition structure 120 is a single-layer structure, the cross-sectional shape of the partition structure 120 can be an inverted trapezoid with a larger top and smaller bottom.

[0080] In some embodiments, see Figure 1The partition structure 120 may include a first isolation portion 121 and a blocking portion 122 stacked sequentially along a direction away from the substrate 110. The blocking portion 122 may be located on the side of the first isolation portion 121 facing away from the substrate 110. The outer contour of the orthographic projection of the blocking portion 122 on the substrate 110 is located outside the outer contour of the orthographic projection of the first isolation portion 121 on the substrate 110, that is, the orthographic projection of the first isolation portion 121 on the substrate 110 is located within the orthographic projection of the blocking portion 122 on the substrate 110. With this configuration, by making the outer contour of the orthographic projection of the blocking portion 122 on the substrate 110 outside the outer contour of the orthographic projection of the first isolation portion 121 on the substrate 110, it is equivalent to making the partition structure 120 form an undercut structure that is "larger at the top and smaller at the bottom", that is, the partition structure 120 has an "eaves". In this way, during the formation of the light-emitting layer 133 of the light-emitting unit 130, the partition structure 120 can isolate the light-emitting layer 133.

[0081] In some embodiments, the partition structure 120 may include a second isolation portion, which may be located on the side of the first isolation portion 121 opposite to the blocking portion 122. The outer contour of the orthographic projection of the second isolation portion on the substrate 110 may be located outside the outer contour of the orthographic projection of the first isolation portion 121 on the substrate 110. Thus, in embodiments where the partition structure 120 is made of a conductive material, the resistance of the partition structure 120 can be reduced by providing the stacked first isolation portion 121, second isolation portion, and blocking portion 122, thereby reducing the power consumption of the display panel 100. For example, the cross-sectional shape of the partition structure 120 formed by the first isolation portion 121, second isolation portion, and blocking portion 122 may be I-shaped.

[0082] For example, at least one of the first isolation portion 121, the second isolation portion, and the blocking portion 122 may be made of a conductive material (e.g., a metal). The material of at least one of the first isolation portion 121, the second isolation portion, and the blocking portion 122 may include metals such as titanium, silver, copper, aluminum, and molybdenum, or alloys, or conductive oxides (such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), aluminum zinc oxide (AZO), gallium zinc oxide, tantalum titanium oxide, tin oxide, cadmium oxide, and indium oxide, any one or more of these. In other examples, at least one of the first isolation portion 121, the second isolation portion, and the blocking portion 122 may be made of an insulating material; this embodiment of the application does not limit this.

[0083] For example, the material of the first isolation section may include at least one of aluminum, copper, and silver.

[0084] For example, the material of the barrier may include at least one of titanium and molybdenum.

[0085] For example, the material of the second isolation section may include at least one of titanium and molybdenum.

[0086] In embodiments where the material of the first isolation portion 121 is a conductive material, the second electrode 132 of the light-emitting unit 130 can be electrically connected to the partition structure 120. For example, the second electrode 132 can be electrically connected to the first isolation portion 121. In this way, the second electrodes 132 located in each partition opening 123 can be connected into a whole through the first isolation portion 121 and connected to the second power line for applying power voltage to the second electrode 132, thereby optimizing the wiring layout of the display panel 110.

[0087] In embodiments where the material of the second isolation section is a conductive material, the second electrode 132 of the light-emitting unit 130 can be electrically connected to the second isolation section. In this way, each second electrode 132 can be connected to the second power line through the second isolation section, thereby optimizing the wiring layout of the display panel 110.

[0088] In embodiments where both the first isolation portion 121 and the second isolation portion are made of conductive materials, the second electrode 132 of the light-emitting unit 130 can be electrically connected to at least one of the first isolation portion 121 and the second isolation portion, thereby improving the connection stability between the second electrode 132 and the isolation structure 120. It can also be electrically connected to the second power line through at least one of the first isolation portion 121 and the second isolation portion, thereby optimizing the wiring layout of the display panel 110. For example, the second electrode 132 of the light-emitting unit 130 is connected to both the first isolation portion 121 and the second isolation portion.

[0089] The structure of the partition structure 120 is described in patents PCT / CN2023 / 134518, 202310759370.2, 202310740412.8, 202310707209.0, 202311346196.5, and 202310909421.5 for reference.

[0090] The pixel limiting layer 160 provided in the embodiments of this application will be described below.

[0091] In some embodiments, see Figure 1The display panel 100 may include a pixel defining layer 160. The pixel defining layer 160 may be disposed on the side of the partition structure 120 near the substrate 110, and the partition structure 120 may be disposed on the surface of the pixel defining layer 160 away from the substrate 110. The pixel defining layer 160 may have a pixel opening, and the pixel opening and the partition opening 123 may be correspondingly disposed, that is, the pixel opening and the partition opening 123 are connected, and the light-emitting area of ​​the light-emitting unit 130 may be located within the pixel opening. In this way, by providing the pixel defining layer 160, it is convenient to set the light-emitting unit 130 on the substrate 110. For example, the orthographic projection of the pixel opening on the substrate 110 may be located within the orthographic projection of the partition opening 123 on the substrate 110.

[0092] In this context, the "light-emitting area" of the light-emitting unit 130 can refer to the region on the light-emitting unit 130 that plays a primary role in emitting light. A first electrode 131 of the light-emitting unit 130 can be disposed on the side of the pixel opening closest to the substrate 110, and the light-emitting layer 133 located within the pixel opening is in contact with the first electrode 131. The light-emitting layer 133 located outside the pixel opening is not in direct contact with the first electrode 131, and the light emitted by this portion of the light-emitting layer 133 is weaker or even non-emitting. Therefore, the "light-emitting area" can refer to the region located within the pixel opening where the light-emitting layer 133 is in direct contact with the first electrode 131.

[0093] In some embodiments, the pixel limiting layer 160 may not be provided on the substrate 110, which can help simplify the structure of the display panel 100, reduce the manufacturing cost of the display panel 100, and help make the display panel 100 thinner and lighter.

[0094] The following describes the light-emitting unit 130 provided in the embodiments of this application.

[0095] In some embodiments, see Figure 1 The light-emitting unit 130 may include a first electrode 131, a light-emitting functional part, and a second electrode 132 sequentially stacked along a direction away from the substrate 110. The first electrode 131 may be located on the side of the light-emitting functional part facing the substrate 110; for example, the first electrode 131 may be located on the side of the partition structure 120 facing the substrate 110. At least a portion of the light-emitting layer 133 of the light-emitting functional part and at least a portion of the second electrode 132 may be located within the partition opening 123. One of the first electrode 131 and the second electrode 132 may be an anode, and the other of the first electrode 131 and the second electrode 132 may be a cathode. In this embodiment, the first electrode 131 is described as an anode and the second electrode 132 is a cathode.

[0096] For example, the first electrode 131 can be electrically connected to a pixel driving circuit, which can be electrically connected to a first power line. The second electrode 132 can be electrically connected to a second power line. One of the first and second power lines is used to transmit a high voltage, and the other is used to transmit a low voltage. For example, the first power line is used to transmit a high voltage, and the second power line is used to transmit a low voltage.

[0097] In embodiments where the partition structure 120 includes a conductive material, the second electrode 132 can be electrically connected to the partition structure 120. This facilitates the electrical connection of the second electrode 132 to the second power line via the partition structure 120, thereby optimizing the wiring layout of the display panel 100.

[0098] For example, the light-emitting functional unit may include at least an emission layer (EML) 133, and may also include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole block layer (HBL), and an electron block layer (EBL). Alternatively, the light-emitting functional unit may also be a stacked emission layer 133, that is, including at least two emission layers 133 and a charge generation layer (CGL) located between each adjacent emission layer 133.

[0099] The light extraction layer 140 provided in the embodiments of this application will be described below.

[0100] In some embodiments, see Figure 1 The display panel 100 may include a light extraction layer 140, which may be located on the side of the first encapsulation layer 151 facing away from the substrate 110. For example, the light extraction layer 140 may include a first light extraction layer 141 and a second light extraction layer 142. The first light extraction layer 141 may be located on the side of the second light extraction layer 142 facing the light-emitting unit 130, and the refractive index of the first light extraction layer 141 may be greater than the refractive index of the second light extraction layer 142.

[0101] This setting, combined with Figure 1 , Figure 2aTaking incident light ray R2 illuminating interface 143 to form outgoing light ray C2, and incident light ray R3 illuminating interface 143 to form outgoing light ray C3 as examples, when the light emitted by the light-emitting unit 130 illuminates the interface 143 between the first light extraction layer 141 and the second light extraction layer 142, since the refractive index of the first light extraction layer 141 is greater than that of the second light extraction layer 142, the angle between the incident light ray R2 and the normal perpendicular to interface 143 (i.e., the incident angle) is smaller than the angle between the outgoing light ray C2 and the normal perpendicular to interface 143 (i.e., the outgoing angle). This causes the outgoing light ray C2 to deflect relative to the incident light ray R2 along the direction from the light-emitting unit 130 to the partition structure 120 (the principle of outgoing light ray C3 and incident light ray R3 is similar and will not be repeated here). This is equivalent to... This causes at least a portion of the emitted light rays passing through the interface 143 to deflect relative to the incident light rays along the direction from the light-emitting unit 130 to the partition structure 120. This allows the at least a portion of the emitted light rays to compensate for the light R4 blocked by the partition structure 120 and enter the user's eyes from the display panel 100. In other words, through the refraction effect between the first light extraction layer 141 and the second light extraction layer 142, at least a portion of the light rays emitted through the light extraction layer 140 diffuses in all directions, thereby alleviating the phenomenon of low display brightness when the user views the display panel 100 at a wide viewing angle, and thus improving the viewing angle display effect of the display panel 100 and the display device.

[0102] The interface 143 can be the surface of the first light extraction layer 141 attached to one side of the second light extraction layer 142, and / or the interface 143 can be the surface of the second light extraction layer 142 attached to one side of the first light extraction layer 141.

[0103] It should be noted that, see Figure 2b When the material of the partition structure 120 has poor light transmittance (e.g., the partition structure 120 is made of metal), the incident light ray R4 cannot be emitted from the display panel 100 because it is blocked by the partition structure 120, and therefore cannot reach the user's eyes. Both the incident light ray R1 and the outgoing light ray C1 are perpendicular to the interface 143. The directions of the incident light ray R1 and the outgoing light ray C1 can be the same, that is, the outgoing light ray C1 does not deflect relative to the incident light ray R1, which is beneficial for improving the display brightness at the viewing angle and improving the display effect of the display panel 100. This application mainly discusses the case where some of the incident light rays passing through the interface 143 are not perpendicular to the interface 143. For example, incident light ray R2, incident light ray R3, outgoing light ray C2, and outgoing light ray C3.

[0104] In some embodiments, the orthographic projection of the first light extraction layer 141 on the substrate 110 may at least partially lie within the orthographic projection of the second light extraction layer 142 on the substrate 110, so that the light emitted by the light-emitting unit 130 can sequentially enter the first light extraction layer 141 and the second light extraction layer 142 and illuminate the interface 143. This allows at least a portion of the light to compensate for the light R4 blocked by the partition structure 120 entering the user's eyes, thereby alleviating the phenomenon of low display brightness when the user views the display panel 100 at a wide viewing angle and improving the viewing angle display effect of the display panel 100.

[0105] For example, the second light extraction layer 142 can cover the first light extraction layer 141, so that when the light emitted by the light-emitting unit 130 shines on the interface between the first light extraction layer 141 and the second light extraction layer 142, part of the light is deflected at the interface along the direction from the light-emitting unit 130 to the partition structure 120, thereby improving the viewing angle display effect of the display panel 100.

[0106] In other embodiments, the side of the second light extraction layer 142 facing away from the substrate 110 can be a plane, thereby making the structure of the side of the second light extraction layer 142 facing away from the substrate 110 simpler and reducing the fabrication difficulty of the second light extraction layer 142.

[0107] For example, the first light extraction layer 141 may also be located on the side of at least part of the partition structure 120 opposite to the substrate 110. The orthographic projection of the first light extraction layer 141 on the substrate 110 and the orthographic projection of the partition structure 120 on the substrate 110 may at least partially overlap, thereby expanding the coverage area of ​​the first light extraction layer 141. This allows more light emitted by the light-emitting unit 130 to pass through the first light extraction layer 141, so that more light passes through the interface 143 and is deflected along the direction from the light-emitting unit 130 to the partition structure 120, thereby improving the viewing angle display effect of the display panel 100. For example, see... Figure 1 The orthographic projection of the first light extraction layer 141 on the substrate 110 can cover the edge of the orthographic projection of the partition structure 120 on the substrate 110.

[0108] For example, see Figure 1 There can be multiple first light extraction layers 141, and multiple first light extraction layers 141 can be correspondingly configured with multiple light-emitting units 130. For example, one first light extraction layer 141 can be correspondingly configured with at least one light-emitting unit 130.

[0109] For example, along a cross section parallel to the substrate 110, the cross-sectional dimensions of the first light extraction layer 141 gradually decrease from the first light extraction layer 141 to the second light extraction layer 142. When the incident light rays R2 and R3 emitted by the light-emitting unit 130 pass through the interface 143, the incident angle between the incident light rays R2 and R3 and the interface 143 is small, making it less likely for total internal reflection to occur at the interface 143. This helps to improve the light extraction efficiency of the display panel 100. In addition, it also has a significant improvement effect on ultra-wide viewing angle displays.

[0110] For example, the surfaces on which the first light extraction layer 141 and the second light extraction layer 142 are bonded can protrude in a direction away from the substrate 110. For instance, the surfaces on which the first light extraction layer 141 and the second light extraction layer 142 are bonded can be curved surfaces. Figure 1 (or conical surface)

[0111] In the embodiment where the surfaces of the first light extraction layer 141 and the second light extraction layer 142 are curved, the transition of the curved surface is relatively smooth, so that the difference in the deflection angle between two adjacent beams of light emitted by the light-emitting unit 130 when passing through the interface 143 is small. This is beneficial to improving the uniformity of the display brightness when viewing the display panel 100 at a wide viewing angle, thereby improving the viewing angle display effect of the display panel 100.

[0112] See Figure 2a Normals F2 and F3 intersect at point O. The light-emitting layer 133 of a light-emitting unit 130 can respectively include regions corresponding to OA (i.e., defined by normals) Figure 2a The left side region of the luminescent layer 133 and the OB region (i.e. Figure 2a The first and second light-emitting parts (in the right region of the light-emitting layer 133) have a point O that can be the center of curvature O corresponding to a portion of the arc surface. It is worth noting that the surfaces on which the first light extraction layer 141 and the second light extraction layer 142 are attached are arc surfaces, and the center of curvature O corresponding to the arc surface can be one or more.

[0113] In some specific embodiments, the incident point of the light emitted by the light-emitting unit 130 at the interface 143 is located on the same side of the center a of the light-emitting unit 130 as the center O of the curvature circle corresponding to the incident point; or, the orthographic projection of the center O of the curvature circle corresponding to the incident point of the light emitted by the light-emitting unit 130 at the interface 143 onto the substrate 110 overlaps with the orthographic projection of the center a of the light-emitting unit 130 onto the substrate 110, and the center O of the curvature circle corresponding to the incident point of the light emitted by the light emitted by the light-emitting unit 130 at the interface 143 is located on the side of the light-emitting unit 130 facing the substrate 110, that is, the center O of the curvature circle corresponding to the incident point is located below the light-emitting unit 130. For example, combined with Figure 2aThe point of incidence of the light emitted from the light-emitting unit 130 at the interface 143 between the center of curvature O and the light-emitting unit 130 (e.g., Figure 2a The intersection points of incident rays R2 and R3 with interface 143 are both located to the right of center a of light-emitting unit 130. This allows the area of ​​the first light-emitting part on the left to be larger than the area of ​​the second light-emitting part on the right, resulting in more light rays from the light-emitting layer 133 of light-emitting unit 130 being located to the left of the normal. The light rays from the light-emitting layer 133 located to the left of the normal diffuse towards a wider viewing angle, thus improving the viewing angle display range. Here, center a of light-emitting unit 130 is the exact center of light-emitting unit 130; the center of curvature O corresponding to the incident point refers to the center of curvature O corresponding to the arc surface of the region where the incident point is located.

[0114] For example, the radius of curvature corresponding to the incident point of the light emitted by the light-emitting unit 130 at the interface 143 can be greater than the maximum distance between the light-emitting layer 133 of the light-emitting unit 130 and the incident point, so that the center of curvature O corresponding to the incident point can be located on the side of the light-emitting unit 130 facing the substrate 110, and the area of ​​the first light-emitting part located on the first side corresponding to the normal can be greater than the area of ​​the second light-emitting part located on the second side, so that the light-emitting layer 133 of the light-emitting unit 130 is more located on the first side of the normal; for example Figure 2a This allows the area of ​​the first light-emitting part located on the left side of the normal to be larger than the area of ​​the second light-emitting part located on the right side, so that the light-emitting layer 133 of a light-emitting unit 130 is located more on the left side of the normal. The light from the light-emitting layer 133 located on the left side of the normal will diffuse towards a wider viewing angle, thereby increasing the amount of light diffused at a wider viewing angle and improving the viewing angle display range.

[0115] In some specific embodiments, the radius of curvature of the incident point of the light emitted by the light-emitting unit 130 at the interface 143 can be greater than or equal to 3μm, thereby making the radius of curvature of the arc surface larger, making the arc surface more gentle, and the arc surface presents a relatively flat arc shape. This is beneficial to make the intersection point O of the normal F2 and the normal F2 located below the light-emitting layer 133 (that is, the intersection point O is located on the side of the light-emitting layer 133 facing the substrate 110). This allows the area of ​​the first light-emitting part on the left side to be larger than the area of ​​the second light-emitting part on the right side, so that the light-emitting layer 133 of a light-emitting unit 130 is more located to the left of the normal. The light from the light-emitting layer 133 located to the left of the normal will diffuse towards a wider viewing angle, thereby making more light diffused over a wider viewing angle, thus improving the viewing angle display range.

[0116] For example, the radius of curvature corresponding to the incident point of the light emitted by the light-emitting unit 130 at the interface 143 can be 3μm, 3.2μm, 3.5μm, 3.6μm, 3.7μm, 3.9μm, 4μm, 4.2μm, 4.5μm, 4.7μm, 5μm, 5.2μm...

[0117] It is worth noting that the left and right sides in the above embodiments are relative to the normal corresponding to the incident point, and are not specifically limited thereto.

[0118] In other embodiments, the side of the first light extraction layer 141 facing away from the substrate 110 can be a plane, thereby making the structure of the side of the first light extraction layer 141 facing away from the substrate 110 simpler and reducing the fabrication difficulty of the first light extraction layer 141.

[0119] In some specific embodiments, at least one of the first light extraction layer 141 and the second light extraction layer 142 may be made of an organic material (e.g., an organic transparent material), which helps to buffer stress within the inorganic film layer. When both the first light extraction layer 141 and the second light extraction layer 142 are made of organic materials, their bonding force is strong, and peeling is less likely to occur. For example, at least one of the first light extraction layer 141 and the second light extraction layer 142 may be made of a resin material or polyimide. For example, both the first light extraction layer 141 and the second light extraction layer 142 may be made of resin materials.

[0120] For example, the refractive index of the first light extraction layer 141 can be greater than or equal to 1.5 and less than or equal to 1.8. For instance, the refractive index of the first light extraction layer 141 can be 1.5, 1.6, 1.7, 1.8 or any value between 1.5 and 1.8.

[0121] For example, the refractive index of the second light extraction layer 142 may be greater than 1.4 and less than or equal to 1.5. For instance, the refractive index of the first light extraction layer 141 may be 1.41, 1.45, 1.5 or any value between 1.4 and 1.5.

[0122] The following description explains that the multiple encapsulation layers 150 provided in the embodiments of this application are all located on the side of the light extraction layer 140 facing the substrate 110.

[0123] In some embodiments, see Figure 3 Multiple encapsulation layers 150 (first encapsulation layer 151, second encapsulation layer 152 and third encapsulation layer 153) can all be located on the side of the light extraction layer 140 facing the substrate 110. In this way, since the light extraction layer 140 is located outside the multiple encapsulation layers 150, there is no need to consider the influence of the light extraction layer 140 on the encapsulation effect of the multiple encapsulation layers 150, which is beneficial to broaden the material selection of the light extraction layer 140.

[0124] The following describes how the second light extraction layer 142 provided in the embodiments of this application is reused as the second encapsulation layer 152.

[0125] In some embodiments, see Figure 1 The second light extraction layer 142 can be reused as the second encapsulation layer 152, thus eliminating the need for a separate second encapsulation layer 152. This simplifies the manufacturing process and structure of the display panel 100 and makes the display panel 100 thinner and lighter.

[0126] See Figure 1 The first encapsulation layer 151 may be located on the side of the first light extraction layer 141 facing the light-emitting unit 130. In an embodiment where the refractive index of the first encapsulation layer 151 is greater than that of the first light extraction layer 141, the light emitted by the light-emitting unit 130 can be deflected along the direction from the light-emitting unit 130 to the partition structure 120 when it enters the first light extraction layer 141 from the first encapsulation layer 151, thereby improving the viewing angle of the display panel 100 and the display device. The principle is similar to that of the first light extraction layer 141 and the second light extraction layer 142, and will not be described in detail here. Furthermore, the refractive indices of the first encapsulation layer 151, the first light extraction layer 141, and the second light extraction layer 142 decrease sequentially from the substrate 110 toward the light-emitting unit 130. The first light extraction layer 141 can serve as a transition, making the refractive index differences between the first encapsulation layer 151 and the first light extraction layer 141, and between the first light extraction layer 141 and the second light extraction layer 142, smaller than the refractive index difference between the first encapsulation layer 151 and the second light extraction layer 142. When light passes through two layers with smaller refractive index differences, total internal reflection is less likely to occur compared to when light passes through two layers with larger refractive index differences, which is beneficial to improving the light extraction efficiency of the display panel 100. Secondly, the shape of the surface of the first light extraction layer 141 attached to the second light extraction layer 142 can be set to be more regular to alleviate the phenomenon that the light emission angle is difficult to control due to the irregular surface shape of the first encapsulation layer 151 on the side facing away from the substrate 110.

[0127] For example, the first light extraction layer 141 can contact the encapsulation portion 1511, and the orthographic projection of the encapsulation portion 1511 on the substrate 110 is located within the orthographic projection of the first light extraction layer 141 on the substrate 110. That is, the first light extraction layer 141 can cover the side of the encapsulation portion 1511 facing away from the substrate 110 and the side of the encapsulation portion 1511. In other words, the first light extraction layer 141 completely covers the encapsulation portion 1511, which is beneficial to realize that the light emitted by the light-emitting unit 130 is deflected along the direction from the light-emitting unit 130 to the partition structure 120 when it enters the first light extraction layer 141 from the encapsulation portion 1511. The principle is similar to that of the second light extraction layer 142 covering the first light extraction layer 141, and will not be described again. In addition, the bonding force between the first light extraction layer 141 and the partition structure 120, and the bonding force between the first light extraction layer 141 and the second light extraction layer 142 can be greater than the bonding force between the second light extraction layer 142 and the partition structure 120. This can alleviate the peeling phenomenon caused by the weak bonding force between the second light extraction layer 142 and the partition structure 120, and improve the stability between the various film layers of the display panel 100.

[0128] In the embodiment where a third encapsulation layer 153 is provided, the third encapsulation layer 153 may be located on the side of the light extraction layer 140 away from the substrate 110. By placing the light extraction layer 140 between the first encapsulation layer 151 and the third encapsulation layer 153, the light extraction layer 140 can be better protected, and it is also beneficial to make the display panel 100 thinner and lighter.

[0129] The following describes the optical extraction layer 140 provided in the embodiments of this application, which is disposed between the second encapsulation layer 152 and the first encapsulation layer 151.

[0130] See Figure 2b The display panel 100 may include a first encapsulation layer 151, a second encapsulation layer 152, and a third encapsulation layer 153 arranged sequentially along the direction away from the substrate 110. The second encapsulation layer 152 and the third encapsulation layer 153 may both be located on the side of the light extraction layer 140 away from the substrate 110. The second encapsulation layer 152 may be located between the light extraction layer 140 and the third encapsulation layer 153. In this case, the second light extraction layer 142 is not reused as the second encapsulation layer 152, that is, the second light extraction layer 142 and the second encapsulation layer 152 are set separately, thereby improving the encapsulation effect.

[0131] For example, the refractive index of the second encapsulation layer 152 can be less than or equal to the refractive index of the second light extraction layer 142, which is beneficial to make the light emitted by the light-emitting unit 130 deflected along the direction from the light-emitting unit 130 to the partition structure 120 when it enters the second encapsulation layer 152 from the second light extraction layer 142. The principle is similar to that of the second light extraction layer 142 covering the first light extraction layer 141, and will not be described again.

[0132] For example, the refractive index of the second encapsulation layer 152 can be greater than 1.4 and less than or equal to 1.5. For instance, the refractive index of the second encapsulation layer 152 can be 1.41, 1.45, 1.5, or any value between 1.4 and 1.5.

[0133] The first encapsulation layer 151 provided in the embodiments of this application will be described below.

[0134] See Figures 1-3 The first encapsulation layer 151 can be located on the side of the light-emitting unit 130 away from the substrate 110. The first encapsulation layer 151 includes a plurality of encapsulation portions 1511, which can correspond to the light-emitting unit 130. The encapsulation portions 1511 can extend from the side of the partition structure 120 to the side of the partition structure away from the substrate 110, thereby making the encapsulation portions 1511 provide better protection for the light-emitting unit 130. The light extraction layer 140 can be located on the side of the first encapsulation layer 151 opposite to the substrate 110.

[0135] For example, see Figure 1 The encapsulation portion 1511 may include a first extension portion 1511a located on the side of the partition structure 120 away from the substrate 110. By providing the first extension portion 1511a, process errors can prevent the encapsulation portion 1511 from failing to completely cover the light-emitting unit 130, thereby improving the encapsulation effect of the encapsulation portion 1511.

[0136] For example, the extension length of the first extension 1511a can be greater than or equal to 2μm, thereby making the extension length of the first extension 1511a larger, which is beneficial to further improve the packaging effect of the packaging portion 1511. For example, the extension length of the first extension 1511a can be 2μm, 3μm, 4μm or any value greater than 2μm.

[0137] For example, see Figure 1 The orthographic projection of the encapsulation unit 1511 on the substrate 110 is located within the orthographic projection of the first light extraction layer 141 on the substrate 110, thereby expanding the coverage area of ​​the first light extraction layer 141. This allows more light emitted by the light-emitting unit 130 to pass through the first light extraction layer 141, so that more light passes through the interface 143 and is deflected along the direction from the light-emitting unit 130 to the partition structure 120, thereby improving the viewing angle display effect of the display panel 100.

[0138] See Figure 1 and Figure 5 ,exist Figure 5In this embodiment, the first light extraction layer 141 can contact the encapsulation portion 1511. The first light extraction layer 141 only covers a portion of the encapsulation portion 1511 (e.g., the middle portion), and does not cover another portion of the encapsulation portion 1511 (e.g., the edge portion). A sudden change in the optical path will exist between the middle portion covered by the first light extraction layer 141 and the edge portion not covered by the first light extraction layer 141 (at this time, the optical path difference between the light ray R5 passing through the middle portion and the light ray R6 passing through the edge portion is large), resulting in higher brightness at a certain viewing angle, thus affecting the display effect. This embodiment expands the coverage area of ​​the first light extraction layer 141 by completely covering the orthographic projection of the encapsulation portion 151 on the substrate 110 with the orthographic projection of the first light extraction layer 141 on the substrate 110. This allows the first light extraction layer 141 to cover the sudden change in the optical path, thereby avoiding the occurrence of the sudden change and improving the uniformity of brightness at different viewing angles, thus enhancing the display effect.

[0139] For example, see Figure 1 Along the thickness direction of the substrate 110, there may be a gap 171 between the first extension 1511a and the side of the partition structure 120 away from the substrate. The first light extraction layer 141 may contact the encapsulation portion 1511 and may also be located in the gap 171, thereby alleviating the peeling phenomenon between the first extension 1511a and the partition structure 120.

[0140] In some embodiments, the material of the second encapsulation layer 152 may be an organic material, so that the second encapsulation layer 152 can buffer the stress of the inorganic film layer.

[0141] In some embodiments, at least one of the first encapsulation layer 151 and the third encapsulation layer 153 may be made of an inorganic material, thereby facilitating effective barrier against water and oxygen; for example, it may be at least one of silicon nitride or silicon oxide.

[0142] In some embodiments, the refractive index of the first encapsulation layer 151 may be greater than the refractive index of the first light extraction layer 141. For example, the refractive index of the first encapsulation layer may be greater than or equal to 1.8 and less than 1.9. For example, the refractive index of the first encapsulation layer may be 1.8, 1.83, 1.85, 1.87, 1.89 or any value between 1.8 and 1.9.

[0143] In some embodiments, the second encapsulation layer 152 may be prepared by coating or other methods.

[0144] In some embodiments, at least one of the first encapsulation layer 151 and the third encapsulation layer 153 may be prepared by a deposition process, such as atomic layer deposition (ALD), physical vapor deposition (PVD), or chemical vapor deposition (CVD).

[0145] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0146] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0147] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: substrate; A partition structure is disposed on one side of the substrate, and the partition structure defines a plurality of partition openings; The light-emitting unit is provided in multiple ways, and at least part of the light-emitting unit is located within the partition opening; A first encapsulation layer is located on the side of the light-emitting unit away from the substrate. The first encapsulation layer includes a plurality of encapsulation portions, each of which corresponds to the light-emitting unit and extends from the side of the partition structure to the side of the partition structure away from the substrate. A light extraction layer is located on the side of the first encapsulation layer away from the substrate; wherein the light extraction layer includes a first light extraction layer and a second light extraction layer, a plurality of first light extraction layers are provided, and the orthographic projection of the encapsulation portion on the substrate is located within the orthographic projection of the first light extraction layer on the substrate; the second light extraction layer is located on the side of the first light extraction layer away from the light-emitting unit, and the refractive index of the first light extraction layer is greater than the refractive index of the second light extraction layer.

2. The display panel according to claim 1, characterized in that, The encapsulation portion includes a first extension located on the side of the partition structure away from the substrate.

3. The display panel according to claim 1, characterized in that, The material of the first encapsulation layer is an inorganic material.

4. The display panel according to claim 2, characterized in that, The extension length of the first extension is greater than or equal to 2 μm.

5. The display panel according to claim 2, characterized in that, Along the thickness direction of the substrate, there is a gap between the first extension and the side of the partition structure away from the substrate, the first light extraction layer is in contact with the encapsulation portion, and the first light extraction layer is also located in the gap.

6. The display panel according to any one of claims 1-5, characterized in that, The second light extraction layer is reused as the second encapsulation layer.

7. The display panel according to claim 6, characterized in that, The display panel further includes a third encapsulation layer located on the side of the light extraction layer away from the substrate.

8. The display panel according to claim 7, characterized in that, The material of the third encapsulation layer is an inorganic material.

9. The display panel according to any one of claims 1-5, characterized in that, The display panel further includes a second encapsulation layer and a third encapsulation layer, both of which are located on the side of the light extraction layer away from the substrate, with the second encapsulation layer located between the light extraction layer and the third encapsulation layer.

10. The display panel according to claim 9, characterized in that, The refractive index of the second encapsulation layer is less than or equal to the refractive index of the second light extraction layer.

11. The display panel according to claim 9, characterized in that, The refractive index of the second encapsulation layer is greater than 1.4 and less than or equal to 1.

5.

12. The display panel according to claim 9, characterized in that, The second encapsulation layer is an organic material.

13. The display panel according to claim 9, characterized in that, The material of the third encapsulation layer is an inorganic material.

14. The display panel according to any one of claims 1-4, characterized in that, The display panel further includes a second encapsulation layer and a third encapsulation layer, both of which are located on the side of the light extraction layer facing the substrate, with the second encapsulation layer located between the first encapsulation layer and the third encapsulation layer.

15. The display panel according to claim 14, characterized in that, The second encapsulation layer is an organic material.

16. The display panel according to claim 14, characterized in that, The material of the third encapsulation layer is an inorganic material.

17. The display panel according to any one of claims 1-5, characterized in that, Along a cross section parallel to the substrate, the cross-sectional dimensions of the first light extraction layer gradually decrease from the first light extraction layer to the second light extraction layer.

18. The display panel according to any one of claims 1-5, characterized in that, The surface of the first light extraction layer that is attached to the second light extraction layer is an arc surface, and the arc surface is convex in the direction away from the substrate.

19. The display panel according to claim 18, characterized in that, The incident point of the light emitted by the light-emitting unit at the interface and the center of curvature corresponding to the incident point are located on the same side of the center of the light-emitting unit, or the orthographic projection of the center of curvature corresponding to the incident point of the light emitted by the light-emitting unit at the interface onto the substrate overlaps with the orthographic projection of the center of the light-emitting unit onto the substrate; wherein, the interface is the interface between the first light extraction layer and the second light extraction layer; the center of curvature corresponding to the incident point is located on the side of the light-emitting unit facing the substrate.

20. The display panel according to claim 19, characterized in that, The radius of curvature of the incident point of the light emitted by the light-emitting unit at the interface is greater than the maximum distance between the light-emitting layer of the light-emitting unit and the incident point.

21. The display panel according to claim 19, characterized in that, The radius of curvature of the incident point of the light emitted by the light-emitting unit at the interface is greater than or equal to 3 μm.

22. The display panel according to any one of claims 1-5, characterized in that, The refractive index of the first light extraction layer is greater than or equal to 1.5 and less than or equal to 1.

8.

23. The display panel according to any one of claims 1-5, characterized in that, The refractive index of the second light extraction layer is greater than 1.4 and less than or equal to 1.

5.

24. The display panel according to any one of claims 1-5, characterized in that, The refractive index of the first encapsulation layer is greater than the refractive index of the first light extraction layer.

25. The display panel according to claim 24, characterized in that, The refractive index of the first encapsulation layer is greater than or equal to 1.8 and less than 1.

9.

26. The display panel according to any one of claims 1-5, characterized in that, At least one of the first light extraction layer and the second light extraction layer is made of an organic material.

27. The display panel according to claim 26, characterized in that, Both the first light extraction layer and the second light extraction layer are organic materials.

28. The display panel according to claim 26, characterized in that, The material of the first light extraction layer is a resin material or polyimide.

29. The display panel according to claim 26, characterized in that, The material of the second light extraction layer is a resin material or polyimide.

30. The display panel according to claim 1, characterized in that, The partition structure includes a blocking portion and a first isolation portion. The first isolation portion is located on the side of the blocking portion facing the substrate. The outer contour of the orthographic projection of the blocking portion on the substrate is located outside the outer contour of the orthographic projection of the first isolation portion on the substrate.

31. The display panel according to claim 30, characterized in that, The light-emitting unit includes a first electrode, a light-emitting layer, and a second electrode arranged sequentially in a direction away from the substrate. The first electrode is disposed on the side of the partition structure facing the substrate, and the light-emitting layer and the second electrode are located inside the partition opening.

32. The display panel according to claim 31, characterized in that, The second electrode is electrically connected to the isolation structure.

33. The display panel according to claim 31, characterized in that, The partition structure includes a second isolation portion, which is located on the side of the first isolation portion away from the blocking portion. The outer contour of the orthographic projection of the second isolation portion on the substrate is located outside the outer contour of the orthographic projection of the first isolation portion on the substrate.

34. The display panel according to claim 30, characterized in that, The materials of the blocking portion and the first isolation portion include conductive materials.

35. The display panel according to claim 30, characterized in that, The material of the first isolation part includes at least one of aluminum, copper, and silver.

36. The display panel according to claim 30, characterized in that, The material of the blocking part includes at least one of titanium and molybdenum.

37. The display panel according to claim 31, characterized in that, The first isolation section is electrically connected to the second electrode.

38. The display panel according to claim 33, characterized in that, The material of the second isolation section includes a conductive material.

39. The display panel according to claim 38, characterized in that, The material of the second isolation section includes at least one of titanium and molybdenum.

40. The display panel according to claim 38, characterized in that, At least one of the first isolation portion and the second isolation portion is electrically connected to the second electrode.

41. The display panel according to claim 1, characterized in that, The display panel further includes a pixel defining layer located between the partition structure and the substrate. The pixel defining layer defines a plurality of pixel openings, which are correspondingly arranged with the plurality of partition openings. The orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the partition openings on the substrate.

42. A display device, characterized in that, Includes the display panel as described in any one of claims 1-41.

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