Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel comprises a substrate, the partition structure is arranged on one side of the substrate, and a plurality of partition openings are defined by the partition structure; at least part of the light-emitting unit is located in the partition opening; the first packaging layer is located on the side, away from the substrate, of the light-emitting unit, the first packaging layer comprises a plurality of packaging parts, the packaging parts correspond to the light-emitting unit, and the packaging parts extend to the side, away from the substrate, of the partition structure from the side face of the partition structure; the light extraction layer is located on the side, away from the substrate, of the first packaging layer; the light extraction layer comprises a plurality of first light extraction layers and second light extraction layers, and the orthographic projection of the packaging part on the substrate is located in the orthographic projection of the first light extraction layers on the substrate; the second light extraction layer is located at one 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 that of the second light extraction layer. Therefore, according to the display panel and the display device provided by the embodiment of the invention, the visual angle display effect of the display panel and the display device can be improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display technology is regarded as the most promising new flat panel display technology of the next generation. Compared with liquid crystal display technology, OLED display technology has the advantages of low energy consumption, low cost, self-luminescence, wide viewing angle and fast response speed. However, the current OLED display panel has the problem of poor viewing angle display effect. Summary of the invention

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

[0004] In a first aspect, an embodiment of the present application provides a display panel, comprising: a substrate; a partition structure, the partition structure is arranged on one side of the substrate, and the partition structure defines a plurality of partition openings; a light-emitting unit, a plurality of light-emitting units are provided, and the light-emitting units are at least partially located in the partition openings; a first encapsulation layer, the first encapsulation layer is located on a side of the light-emitting unit away from the substrate, the first encapsulation layer comprises a plurality of encapsulation parts, the encapsulation parts correspond to the light-emitting units, and the encapsulation parts extend from the side of the partition structure to the side of the partition structure away from the substrate; a light extraction layer, the light extraction layer is located on a side of the first encapsulation layer away from the substrate; wherein the light extraction layer comprises a first light extraction layer and a second light extraction layer, a plurality of first light extraction layers are provided, and an orthographic projection of the encapsulation part on the substrate is located within an orthographic projection of the first light extraction layer on the substrate; the second light extraction layer is located on a 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 that of the second light extraction layer.

[0005] The display panel provided by the embodiment of the present application is provided with a light extraction layer, so that at least part of the light emitted by the light unit is deflected in the direction from the light unit to the partition structure after passing through the light extraction layer, so that at least part of the light can 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 watches the display panel at a large viewing angle, thereby improving the viewing angle display effect of the display panel. In addition, the orthographic projection of the packaging part on the substrate is located within the orthographic projection of the first light extraction layer on the substrate, so that the coverage range of the first light extraction layer can be expanded, so that the light emitted by the light unit can pass more through the first light extraction layer, so that more light passes through the interface and is deflected in the direction from the light unit to the partition structure, thereby improving the viewing angle display effect of the display panel.

[0006] In one embodiment, the packaging portion includes a first extension portion located on a 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 providing the first extension portion, it is possible to prevent the packaging portion from being unable to completely cover the light-emitting unit due to process errors, thereby improving the packaging effect of the packaging portion.

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

[0010] In this way, the extension length of the first extension portion is made larger, which is beneficial to further improve the packaging effect of the packaging portion, and also improves the display effect.

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

[0012] In this way, the peeling phenomenon between the first extension portion and the partition structure can be alleviated.

[0013] In one of the embodiments, the second light extraction layer is multiplexed as a second encapsulation layer;

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

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

[0016] In this way, there is no need to separately set up a second encapsulation layer, which is beneficial to simplifying the preparation process and structure of the display panel and is beneficial to making the display panel lighter and thinner.

[0017] In one embodiment, the display panel further includes a second encapsulation layer and a third encapsulation layer, the second encapsulation layer and the third encapsulation layer are both located on a side of the light extraction layer away from the substrate, and the second encapsulation layer is 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 in the range of 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, the second encapsulation layer and the third encapsulation layer are both located on the side of the light extraction layer facing the substrate, and the second encapsulation layer is 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 of the embodiments, along a cross section parallel to the substrate, a cross-sectional dimension of the first light extraction layer gradually decreases along a direction from the first light extraction layer to the second light extraction layer.

[0026] In this way, total reflection is less likely to occur at the interface, which is beneficial to improving the light extraction efficiency of the display panel.

[0027] In one embodiment, the surface of the first light extraction layer attached to the second light extraction layer is a curved surface, and the curved surface is convexly disposed in a direction away from the substrate.

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

[0029] In one of the embodiments, 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 on the substrate overlaps with the orthographic projection of the center of the light emitting unit on 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 corresponding to 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 corresponding to the incident point of the light emitted by the light emitting unit at the interface is greater than or equal to 3 μm.

[0032] In this way, the radius of curvature of the arc surface is larger, the arc surface is relatively smooth, and the arc surface presents a relatively flat arc shape, which is conducive to the center of the arc surface being 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 on the left side of the normal. The light of the light-emitting layer located on the left side of the normal will diffuse to a large viewing angle, so that more light is diffused at a large viewing angle, thereby improving the viewing angle display range.

[0033] In one embodiment, the refractive index of the first light extraction layer is in a range of 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, the material of at least one of the first light extraction layer and the second light extraction layer is an organic material;

[0038] Preferably, the first light extraction layer and the second light extraction layer are both made of 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 isolating portion, the first isolating portion is located on a side of the blocking portion facing the substrate, and an orthographic projection outer contour of the blocking portion on the substrate is located outside the orthographic projection outer contour of the first isolating portion on the substrate;

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

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

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

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

[0046] In this way, the partition structure can reduce the resistance of the partition structure by providing the stacked first isolation part, the second isolation part and the blocking part, thereby reducing the power consumption of the display panel.

[0047] In one embodiment, the material of the barrier portion and the first isolation portion includes a conductive material;

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

[0049] Preferably, the material of the barrier portion 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 isolating portion and the second isolating portion is electrically connected to the second electrode.

[0054] In one of the embodiments, the display panel also includes a pixel defining layer, which is located between the partition structure and the substrate. The pixel defining layer defines a plurality of pixel openings, and the plurality of pixel openings are arranged corresponding to the plurality of partition openings. The orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the partition opening on the substrate.

[0055] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel in the above-mentioned first aspect.

[0056] The display device provided in the embodiment of the present application includes a display panel, and a light extraction layer is provided so that at least part of the light emitted by the light unit is deflected in the direction from the light unit to the partition structure after passing through the light extraction layer, so that at least part of the light can 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 watches the display panel at a large viewing angle, thereby improving the viewing angle display effect of the display panel. In addition, the orthographic projection of the packaging part on the substrate is located within the orthographic projection of the first light extraction layer on the substrate, so that the coverage range of the first light extraction layer can be expanded, so that the light emitted by the light unit can pass through the first light extraction layer more, so that more light passes through the interface and is deflected in the direction from the light unit to the partition structure, thereby improving the viewing angle display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1A partial cross-sectional view of a display panel provided in an embodiment of the present application.

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

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

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

[0062] Figure 4 A partial top view of the partition structure and the light-emitting unit provided in an embodiment of the present application.

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

[0064] Explanation of the accompanying 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 defining layer; 171, gap. DETAILED DESCRIPTION

[0065] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0066] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, they do not represent any order, quantity or importance, but are only used to distinguish different components. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present application, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

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

[0069] In the relevant OLED display panel, the display panel may include a substrate and a partition structure and a plurality of light-emitting units arranged on the substrate, the partition structure defines a plurality of isolation openings, and the plurality of light-emitting units are correspondingly arranged in the plurality of isolation openings. The partition structure may include a first isolation portion and a blocking portion, and the blocking portion may be located on a side of the first isolation portion facing away from the substrate. The outer contour of the orthographic projection of the blocking portion on the substrate is located at the periphery of the orthographic projection of the outer contour of the first isolation portion on the substrate. For example, the material of the partition structure may include a metal material.

[0070] However, since the material of the partition structure is metal material, which is a non-light-transmitting material, when part of the light from the light-emitting unit is emitted toward the partition structure, the partition structure will block this part of the light and prevent it from continuing to be emitted, causing the user to experience lower display brightness when viewing the display panel at a wide viewing angle, thereby resulting in a poor viewing angle display effect of the display panel.

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

[0072] The following will be combined Figure 1-Figure 5 The display device provided in the embodiment of the present application is described.

[0073] The embodiment of the present application provides a display device, which includes a display panel 100. The display device can be an electronic paper, a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a smart bracelet, a smart watch, a super personal computer, a navigator, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camera, a game console, a clock, a calculator, a TV monitor, a computer monitor, a car display (e.g., an odometer display, etc.), a cockpit controller and / or display, a display of a camera view (e.g., a display of a rear-view camera in a vehicle), an electronic billboard or sign, a projector, and other mobile or fixed terminals.

[0074] Exemplarily, the display panel 100 may 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 (Mini LED) display panel, a micro light emitting diode (Micro LED) display panel, or a liquid crystal (LCD) display panel, etc. The embodiment of the present application is described by taking an OLED display panel as an example.

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

[0076] The display panel 100 provided in the embodiment of the present application is described below.

[0077] See also Figure 1 An embodiment of the present application provides a display panel 100 , and the display panel 100 may include a substrate 110 .

[0078] See also Figure 1 and Figure 4 , the display panel 100 may include a partition structure 120 and a light-emitting unit 130, the partition structure 120 may be arranged 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 unit 130 may be arranged in the partition opening 123. For example, the partition structure 120 may be in a grid shape in a top view. There may be multiple partition openings 123, there may be multiple light-emitting units 130, and multiple light-emitting units 130 may be correspondingly arranged in multiple partition openings 123. For example, at least one light-emitting unit 130 may be arranged in a partition opening 123. The embodiment of the present application is described by taking the example that at least a portion of a light-emitting unit 130 may be arranged in a partition opening 123.

[0079] It should be noted that the partition structure 120 may refer to an undercut structure that is "large at the top and small at the bottom" and can separate the light-emitting layers 133 of adjacent light-emitting units 130. The partition structure 120 may be a structure formed by a single film layer, or a structure formed by stacking multiple film layers. Exemplarily, when the partition structure 120 is a single-layer structure, the cross-sectional shape of the partition structure 120 may be an inverted trapezoid that is "large at the top and small at the bottom".

[0080] In some embodiments, see Figure 1The partition structure 120 may include a first isolation portion 121 and a blocking portion 122 which are sequentially stacked in a direction away from the substrate 110, and the blocking portion 122 may be located on the side of the first isolation portion 121 away from the substrate 110. The orthographic projection outer contour of the blocking portion 122 on the substrate 110 is located outside the orthographic projection outer contour 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. In this way, by making the orthographic projection outer contour of the blocking portion 122 on the substrate 110 located outside the orthographic projection outer contour of the first isolation portion 121 on the substrate 110, it is equivalent to forming an undercut structure of the partition structure 120 with a "large upper part and small lower part", that is, the partition structure 120 has an "eaves", so that in the process of forming 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, the second isolation portion may be located on a side of the first isolation portion 121 away from the blocking portion 122, and 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 an embodiment where the material of the partition structure 120 is a conductive material, the partition structure 120 may reduce the resistance of the partition structure 120 by providing the stacked first isolation portion 121, the second isolation portion and the 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, the second isolation portion and the blocking portion 122 may be an I-shaped.

[0082] Exemplarily, the material of at least one of the first isolation portion 121, the second isolation portion and the blocking portion 122 may be a conductive material (for example, 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, molybdenum, or alloys, or conductive oxides (such as indium tin oxide (Indium Tin Oxide, referred to as ITO), indium zinc oxide (Indium Zinc Oxide, referred to as IZO), zinc oxide (ZnO), aluminum zinc oxide (Aluminum Zinc Oxid; referred to as AZO)), zinc gallium oxide, titanium tantalum oxide, tin oxide, cadmium oxide, indium oxide, any one or more. In other examples, the material of at least one of the first isolation portion 121, the second isolation portion and the blocking portion 122 may be an insulating material, which is not limited in the embodiments of the present application.

[0083] For example, the material of the first isolation portion 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 portion may include at least one of titanium and molybdenum.

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

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

[0088] In an embodiment in which the materials of the first isolation portion 121 and the second isolation portion are both 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 partition structure 120, and 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 arrangement 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 defining layer 160 provided in the embodiment of the present application is described below.

[0091] In some embodiments, see Figure 1, the display panel 100 may include a pixel defining layer 160, the pixel defining layer 160 may be arranged on a side of the partition structure 120 close to the substrate 110, and the partition structure 120 is arranged on the surface of the pixel defining layer 160 away from the substrate 110. A pixel opening may be provided on the pixel defining layer 160, and the pixel opening and the partition opening 123 may be arranged correspondingly, 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 in the pixel opening. In this way, by providing the pixel defining layer 160, it is convenient to arrange 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] The "light-emitting area" of the light-emitting unit 130 may refer to: an area on the light-emitting unit 130 that mainly emits light. The first electrode 131 of the light-emitting unit 130 may be provided on the side of the pixel opening close to the substrate 110, and the light-emitting layer 133 located in 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 part of the light-emitting layer 133 is weak or even does not emit light. Therefore, the "light-emitting area" may refer to the area where the light-emitting layer 133 located in the pixel opening and in direct contact with the first electrode 131 is located.

[0093] In some embodiments, the pixel defining layer 160 may not be disposed 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 lighter and thinner.

[0094] The light emitting unit 130 provided in the embodiment of the present application is described below.

[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 which are sequentially stacked in a direction away from the substrate 110. The first electrode 131 may be located on a side of the light-emitting functional part facing the substrate 110; for example, the first electrode 131 may be located on a 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. The embodiment of the present application is described by taking the first electrode 131 as an anode and the second electrode 132 as a cathode as an example.

[0096] Exemplarily, the first electrode 131 may be electrically connected to a pixel driving circuit, and the pixel driving circuit may be electrically connected to a first power line. The second electrode 132 may be electrically connected to a second power line. One of the first power line and the second power line 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 the embodiment where the partition structure 120 includes a conductive material, the second electrode 132 may be electrically connected to the partition structure 120. In this way, the second electrode 132 is conveniently electrically connected to the second power line through the partition structure 120, thereby optimizing the wiring arrangement of the display panel 100.

[0098] Exemplarily, the light-emitting functional part may include at least a light-emitting layer 133 (Emission layer, EML), 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 blocking layer (HBL) and an electron blocking layer (EBL). Alternatively, the light-emitting functional part may also be a stacked light-emitting layer 133, that is, including at least two light-emitting layers 133 and a charge generation layer (CGL) located between each adjacent light-emitting layer 133.

[0099] The light extraction layer 140 provided in the embodiment of the present application is described below.

[0100] In some embodiments, see Figure 1 The display panel 100 may include a light extraction layer 140, and the light extraction layer 140 may be located on the side of the first encapsulation layer 151 away from the substrate 110. Exemplarily, the light extraction layer 140 may include a first light extraction layer 141 and a second light extraction layer 142, and 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 2a, taking the example of incident light R2 irradiating the interface 143 to form an outgoing light C2, and taking the example of incident light R3 irradiating the interface 143 to form an outgoing light C3. When the light emitted by the light-emitting unit 130 irradiates 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 the refractive index of the second light extraction layer 142, the angle between the incident light R2 and the normal perpendicular to the interface 143 (i.e., the incident angle) is smaller than the angle between the outgoing light C2 and the normal perpendicular to the interface 143 (i.e., the exit angle), thereby causing the outgoing light C2 to deflect relative to the incident light R2 along the direction from the light-emitting unit 130 to the partition structure 120 (in addition, the principles of the outgoing light C3 and the incident light R3 are similar and will not be repeated), which is equivalent to , so that at least part of the outgoing light passing through the interface 143 is deflected relative to the incident light along the direction from the light-emitting unit 130 to the partition structure 120, so that the at least part of the outgoing light can compensate for the light R4 blocked by the partition structure 120 and be emitted from the display panel 100 to enter the user's eyes, that is, through the refraction effect between the first light extraction layer 141 and the second light extraction layer 142, at least part of the light emitted through the light extraction layer 140 is diffused to the surroundings, thereby alleviating the phenomenon of low display brightness when the user watches the display panel 100 at a large viewing angle, thereby improving the viewing angle display effect of the display panel 100 and the display device.

[0102] The interface 143 may be a surface where the first light extraction layer 141 is bonded to the second light extraction layer 142 , and / or the interface 143 may be a surface where the second light extraction layer 142 is bonded to 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 (for example, the partition structure 120 is made of metal), the incident light ray R4 cannot be emitted from the display panel 100 due to being blocked by the partition structure 120, and therefore cannot illuminate the user's eyes. The incident light ray R1 and the outgoing light ray C1 are both perpendicular to the interface 143, and 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 to improving the display brightness at the normal viewing angle and improving the display effect of the display panel 100. The embodiments of the present application mainly discuss the situation where some of the incident light rays passing through the interface 143 are not perpendicular to the interface 143. For example, the incident light ray R2, the incident light ray R3, the outgoing light ray C2, and the outgoing light ray C3.

[0104] In some embodiments, at least a portion of the orthographic projection of the first light extraction layer 141 on the substrate 110 can be located 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 enter the first light extraction layer 141 and the second light extraction layer 142 in sequence and irradiate the interface 143, so that at least a portion of the light can compensate for the light R4 blocked by the partition structure 120 and enter the user's eyes, thereby alleviating the phenomenon of low display brightness when the user watches the display panel 100 at a wide viewing angle, thereby improving the viewing angle display effect of the display panel 100.

[0105] Exemplarily, 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 is irradiated to 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 surface of the second light extraction layer 142 facing away from the substrate 110 can be a plane, so that the structure of the surface of the second light extraction layer 142 facing away from the substrate 110 is relatively simple, thereby reducing the difficulty of preparing the second light extraction layer 142.

[0107] Exemplarily, the first light extraction layer 141 may also be located on the side of at least part of the partition structure 120 away from the substrate 110, and the orthographic projection of the first light extraction layer 141 on the substrate 110 may at least partially overlap with the orthographic projection of the partition structure 120 on the substrate 110, thereby expanding the coverage of the first light extraction layer 141, so that more light emitted by the light emitting unit 130 can pass through the first light extraction layer 141, so that more light passes through the interface 143 and is deflected in 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 may cover the edge of the orthographic projection of the partition structure 120 on the substrate 110 .

[0108] For example, see Figure 1 There may be a plurality of first light extraction layers 141 , and the plurality of first light extraction layers 141 may be disposed correspondingly to the plurality of light emitting units 130 . For example, one first light extraction layer 141 may be disposed correspondingly to at least one light emitting unit 130 .

[0109] Illustratively, along a cross section parallel to the substrate 110, the cross-sectional size of the first light extraction layer 141 gradually decreases along the direction from the first light extraction layer 141 to the second light extraction layer 142. When the incident light R2 and the incident light R3 emitted by the light-emitting unit 130 pass through the interface 143, the incident angles between the incident light R2 and the incident light R3 and the interface 143 are smaller, and total reflection is not likely to occur at the interface 143, which is beneficial to improving the light output rate of the display panel 100. In addition, it also has a significant improvement effect on ultra-wide viewing angle display.

[0110] Exemplarily, the surface where the first light extraction layer 141 and the second light extraction layer 142 are bonded together can be convexly arranged in a direction away from the substrate 110. For example, the surface where the first light extraction layer 141 and the second light extraction layer 142 are bonded together can be a curved surface ( Figure 1 ) or a conical surface.

[0111] In an embodiment where the surface where the first light extraction layer 141 and the second light extraction layer 142 are bonded is a curved surface, since the transition of the curved surface is relatively smooth, the difference in deflection angles between two adjacent light beams emitted by the light emitting unit 130 when passing through the interface 143 is relatively small, which is beneficial to improving the uniformity of 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 also Figure 2a , the normal line F2 and the normal line F3 intersect at point O, and the light-emitting layer 133 of a light-emitting unit 130 can include areas corresponding to OA divided by the normal lines (i.e. Figure 2a The left region of the light emitting layer 133) and the OB region (i.e. Figure 2a The first light-emitting portion and the second light-emitting portion (the right area of ​​the light-emitting layer 133 in FIG), point O can be the center of curvature O corresponding to the partial arc surface. It is worth noting that the surface where the first light extraction layer 141 and the second light extraction layer 142 are bonded is a curved surface, and the center of curvature O corresponding to the curved 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 and the curvature center O corresponding to the incident point are located on the same side of the center a of the light emitting unit 130; or, the orthographic projection of the curvature center O corresponding to the incident point of the light emitted by the light emitting unit 130 at the interface 143 on the substrate 110 overlaps with the orthographic projection of the center a of the light emitting unit 130 on the substrate 110, and the curvature center O corresponding to the incident point of the light emitted by the light emitting unit 130 at the interface 143 is located on the side of the corresponding light emitting unit 130 facing the substrate 110, that is, the curvature center O corresponding to the incident point is located below the light emitting unit 130. For example, in combination with Figure 2a, the center of curvature O and the incident point of the light emitted by the light emitting unit 130 at the interface 143 (such as Figure 2a The intersection of the incident light ray R2, the incident light ray R3 and the interface 143 are all located on the right side of the center a of the light-emitting unit 130, so that the area of ​​the first light-emitting portion located on the left side is larger than the area of ​​the second light-emitting portion located on the right side, so that more light of the light-emitting layer 133 of a light-emitting unit 130 is located on the left side of the normal line, and the light of the light-emitting layer 133 located on the left side of the normal line will diffuse to a large viewing angle, so that more light diffuses at a large viewing angle, thereby improving the viewing angle display range. Among them, the center a of the light-emitting unit 130 is the exact center of the 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 in the area 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 may 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 may be located on the side of the light-emitting unit 130 facing the substrate 110, so that the area of ​​the first light-emitting portion located on the first side corresponding to the normal line is greater than the area of ​​the second light-emitting portion located on the second side, so that the light-emitting layer 133 of a light-emitting unit 130 is more located on the first side of the normal line; for example Figure 2a The area of ​​the first light-emitting portion located on the left side corresponding to the normal can be made larger than the area of ​​the second light-emitting portion located on the right side, so that the light-emitting layer 133 of a light-emitting unit 130 is more located on the left side of the normal, and the light of the light-emitting layer 133 located on the left side of the normal will diffuse to a large viewing angle, so that more light is diffused at a large viewing angle, thereby improving the viewing angle display range.

[0115] In some specific embodiments, 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 or equal to 3μm, so that the radius of curvature of the arc surface is larger, the arc surface is relatively flat, and the arc surface presents a relatively flat arc morphology, which is conducive to making the intersection O of the normal line F2 and the normal line F2 located below the light-emitting layer 133 (that is, the intersection O is located on the side of the light-emitting layer 133 facing the substrate 110), so that the area of ​​the first light-emitting portion located on the left side is larger than the area of ​​the second light-emitting portion located on the right side, so that the light-emitting layer 133 of a light-emitting unit 130 is more located on the left side of the normal, and the light of the light-emitting layer 133 located on the left side of the normal will diffuse to a large viewing angle, so that more light is diffused at a large viewing angle, thereby improving the viewing angle display range.

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

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

[0118] In other embodiments, the surface of the first light extraction layer 141 facing away from the substrate 110 can be a plane, so that the structure of the surface of the first light extraction layer 141 facing away from the substrate 110 is relatively simple, which can reduce the difficulty of preparing the first light extraction layer 141.

[0119] In some specific embodiments, the material of at least one of the first light extraction layer 141 and the second light extraction layer 142 may be an organic material (e.g., an organic transparent material), which is beneficial for buffering the stress in the inorganic film layer. When the materials of the first light extraction layer 141 and the second light extraction layer 142 are both organic materials, the bonding force between the two is strong and it is not easy to peel off. For example, the material of at least one of the first light extraction layer 141 and the second light extraction layer 142 is a resin material or polyimide. For example, the first light extraction layer 141 and the second light extraction layer 142 may both be resin materials.

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

[0121] Exemplarily, 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 example, 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 describes that the multiple encapsulation layers 150 provided in the embodiment of the present 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 (the first encapsulation layer 151, the second encapsulation layer 152 and the 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 conducive to broadening the selectivity of the material of the light extraction layer 140.

[0124] The following describes how the second light extraction layer 142 provided in the embodiment of the present application is multiplexed into 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, so there is no need to set up the second encapsulation layer 152 separately, which is beneficial to simplifying the preparation process and structure of the display panel 100 and facilitating the thinning of the display panel 100.

[0126] See also 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 the refractive index of the first light extraction layer 141, the light emitted by the light emitting unit 130 may be deflected along the direction from the light emitting unit 130 to the partition structure 120 when entering the first light extraction layer 141 from the first encapsulation layer 151, thereby facilitating the improvement of the viewing angle display effect 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. In addition, the refractive indexes of the first encapsulation layer 151, the first light extraction layer 141, and the second light extraction layer 142 decrease in sequence from the substrate 110 toward the light emitting unit 130. The first light extraction layer 141 can serve as a transition, so that the refractive index difference between the first encapsulation layer 151 and the first light extraction layer 141, and the refractive index difference between the first light extraction layer 141 and the second light extraction layer 142 are smaller than the refractive index difference between the first encapsulation layer 151 and the second light extraction layer 142. When light passes through two film layers with a smaller refractive index difference than when light passes through two film layers with a larger refractive index difference, it is less likely to be totally reflected, which is beneficial to improving the light extraction rate 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 relatively regular, so as to alleviate the phenomenon that the light output angle is difficult to control due to the irregular shape of the surface of the first encapsulation layer 151 facing away from the substrate 110.

[0127] Exemplarily, the first light extraction layer 141 can be in contact with the packaging part 1511, and the orthographic projection of the packaging part 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 surface of the packaging part 1511 facing away from the substrate 110 and the side surface of the packaging part 1511, that is, the first light extraction layer 141 completely covers the packaging part 1511, which is conducive to the light emitted by the light-emitting unit 130 being deflected along the direction from the light-emitting unit 130 to the partition structure 120 when entering the first light extraction layer 141 from the packaging part 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 repeated here. 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, thereby alleviating the peeling phenomenon caused by the weak bonding force between the second light extraction layer 142 and the partition structure 120 and improving the stability between the various film layers of the display panel 100.

[0128] In an embodiment in which a third encapsulation layer 153 is provided, the third encapsulation layer 153 can be located on the side of the light extraction layer 140 facing away from the substrate 110. By disposing 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, which is also beneficial to making the display panel 100 lighter and thinner.

[0129] The following describes that the light extraction layer 140 provided in the embodiment of the present application is disposed between the second encapsulation layer 152 and the first encapsulation layer 151 .

[0130] See also Figure 2b The display panel 100 may include a first encapsulation layer 151, a second encapsulation layer 152 and a third encapsulation layer 153 which are sequentially arranged in a direction away from the substrate 110. The second encapsulation layer 152 and the third encapsulation layer 153 may 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. At this time, the second light extraction layer 142 is not multiplexed as the second encapsulation layer 152, that is, the second light extraction layer 142 and the second encapsulation layer 152 are separately arranged, thereby improving the encapsulation effect.

[0131] Exemplarily, 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 conducive to the deflection of the light emitted by the light emitting unit 130 along the direction from the light emitting unit 130 to the partition structure 120 when entering 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 repeated here.

[0132] Exemplarily, the refractive index of the second encapsulation layer 152 may be greater than 1.4 and less than or equal to 1.5. For example, the refractive index of the second encapsulation layer 152 may 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 embodiment of the present application is described below.

[0134] See also Figure 1-Figure 3 The first encapsulation layer 151 may be located on a side of the light emitting unit 130 away from the substrate 110. The first encapsulation layer 151 includes a plurality of encapsulation parts 1511. The encapsulation parts 1511 may correspond to the light emitting unit 130. The encapsulation parts 1511 may extend from the side of the partition structure 120 to the side of the partition structure away from the substrate 110, so that the encapsulation parts 1511 have a better protection effect on the light emitting unit 130. The light extraction layer 140 may be located on a side of the first encapsulation layer 151 away from the substrate 110.

[0135] For example, see Figure 1 The packaging part 1511 may include a first extension part 1511a located on the side of the partition structure 120 away from the substrate 110. By setting the first extension part 1511a, it is possible to prevent the packaging part 1511 from being unable to completely cover the light-emitting unit 130 due to process errors, thereby improving the packaging effect of the packaging part 1511.

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

[0137] For example, see Figure 1 The orthographic projection of the packaging part 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 of the first light extraction layer 141, so that more light emitted by the light-emitting unit 130 can pass through the first light extraction layer 141, so that more light passes through the interface 143 and is deflected in 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 also Figure 1 and Figure 5 ,exist Figure 5In the embodiment, the first light extraction layer 141 may be in contact with the encapsulation part 1511, and the first light extraction layer 141 only covers part of the encapsulation part 1511 (for example, the middle part), and the first light extraction layer 141 does not cover another part of the encapsulation part 1511 (for example, the edge part). There will be a sudden change area of ​​the light path between the middle part covered by the first light extraction layer 141 and the edge part not covered by the first light extraction layer 141 (at this time, the light path difference between the light R5 passing through the middle part and the light R6 passing through the edge part is large), which will cause a certain viewing angle to be large in brightness, thereby affecting the display effect. In the embodiment of the present application, the coverage range of the first light extraction layer 141 can be expanded by completely covering the positive projection of the encapsulation part 151 on the substrate 110 with the orthographic projection of the first light extraction layer 141 on the substrate 110, so that the sudden change area of ​​the light path can be covered by the first light extraction layer 141, thereby avoiding the appearance of the sudden change area, which is beneficial to improving the uniformity of the viewing angle display brightness and improving the display effect.

[0139] For example, see Figure 1 Along the thickness direction of the substrate 110, a gap 171 may be provided between the first extension portion 1511a and the surface of the partition structure 120 away from the substrate, the first light extraction layer 141 may be in contact with the encapsulation portion 1511, and the first light extraction layer 141 may also be located in the gap 171, thereby alleviating the peeling phenomenon between the first extension portion 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, the material of at least one of the first encapsulation layer 151 and the third encapsulation layer 153 may be an inorganic material, so as to effectively block 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 in a range of 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] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0146] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: substrate; A partition structure, the partition structure is arranged on one side of the substrate, and the partition structure defines a plurality of partition openings; A light emitting unit, wherein a plurality of light emitting units are provided and at least a portion of the light emitting units are located in the partition opening; a first encapsulation layer, the first encapsulation layer being located at a side of the light-emitting unit away from the substrate, the first encapsulation layer comprising a plurality of encapsulation parts, the encapsulation parts corresponding to the light-emitting unit, and the encapsulation parts extending from a side of the partition structure to a side of the partition structure away from the substrate; A light extraction layer, wherein the light extraction layer is located on a side of the first encapsulation layer away from the substrate; wherein the light extraction layer comprises a first light extraction layer and a second light extraction layer, a plurality of the 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 a 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 packaging portion includes a first extension portion located on a side of the partition structure away from the substrate; Preferably, the material of the first encapsulation layer is an inorganic material.

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

4. 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 portion and the surface of the partition structure away from the substrate, the first light extraction layer is in contact with the packaging portion, and the first light extraction layer is also located in the gap.

5. The display panel according to any one of claims 1 to 4, characterized in that: The second light extraction layer is multiplexed into a second encapsulation layer; Preferably, the display panel further comprises a third encapsulation layer, and the third encapsulation layer is located on a side of the light extraction layer away from the substrate; Preferably, the material of the third encapsulation layer is an inorganic material.

6. The display panel according to any one of claims 1 to 4, characterized in that: The display panel further includes a second encapsulation layer and a third encapsulation layer, wherein the second encapsulation layer and the third encapsulation layer are both located on a side of the light extraction layer away from the substrate, and the second encapsulation layer is located between the light extraction layer and the third encapsulation layer; Preferably, the refractive index of the second encapsulation layer is less than or equal to the refractive index of the second light extraction layer; Preferably, the refractive index of the second encapsulation layer is in the range of greater than 1.4 and less than or equal to 1.5; Preferably, the second encapsulation layer is an organic material; Preferably, the material of the third encapsulation layer is an inorganic material.

7. The display panel according to any one of claims 1 to 3, further comprising a second encapsulation layer and a third encapsulation layer, wherein the second encapsulation layer and the third encapsulation layer are both located on a side of the light extraction layer facing the substrate, and the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer; Preferably, the second encapsulation layer is an organic material; Preferably, the material of the third encapsulation layer is an inorganic material.

8. The display panel according to any one of claims 1 to 4, characterized in that: Along a cross section parallel to the substrate, a cross-sectional dimension of the first light extraction layer gradually decreases along a direction from the first light extraction layer to the second light extraction layer.

9. The display panel according to any one of claims 1 to 4, characterized in that: The surface of the first light extraction layer attached to the second light extraction layer is a curved surface, and the curved surface is convexly arranged in a direction away from the substrate.

10. The display panel according to claim 9, 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 on the substrate overlaps with the orthographic projection of the center of the light emitting unit on 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; Preferably, the radius of curvature corresponding to 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; Preferably, the radius of curvature corresponding to the incident point of the light emitted by the light emitting unit at the interface is greater than or equal to 3 μm.

11. The display panel according to any one of claims 1 to 4, characterized in that: The refractive index of the first light extraction layer is in a range of greater than or equal to 1.5 and less than or equal to 1.

8.

12. The display panel according to any one of claims 1 to 4, 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.

13. The display panel according to any one of claims 1 to 4, characterized in that: The refractive index of the first encapsulation layer is greater than the refractive index of the first light extraction layer; Preferably, the refractive index of the first encapsulation layer is greater than or equal to 1.8 and less than 1.

9.

14. The display panel according to any one of claims 1 to 4, wherein a material of at least one of the first light extraction layer and the second light extraction layer is an organic material; Preferably, the first light extraction layer and the second light extraction layer are both made of organic materials; Preferably, the material of the first light extraction layer is a resin material or polyimide; Preferably, the material of the second light extraction layer is a resin material or polyimide.

15. The display panel according to claim 1, characterized in that: The partition structure comprises a blocking portion and a first isolating portion, wherein the first isolating portion is located on a side of the blocking portion facing the substrate, and an orthographic projection outer contour of the blocking portion on the substrate is located outside an orthographic projection outer contour of the first isolating portion on the substrate; Preferably, the light-emitting unit comprises a first electrode, a light-emitting layer, and a second electrode sequentially arranged in a direction away from the substrate, the first electrode is arranged on a side of the partition structure facing the substrate, and the light-emitting layer and the second electrode are located in the partition opening; Preferably, the second electrode is electrically connected to the partition structure.

16. The display panel according to claim 15, characterized in that: The partition structure includes a second isolation portion, which is located on a side of the first isolation portion away from the blocking portion, and an orthographic projection outer contour of the second isolation portion on the substrate is located outside the orthographic projection outer contour of the first isolation portion on the substrate.

17. The display panel according to claim 15, characterized in that: The material of the blocking part and the first isolation part includes a conductive material; Preferably, the material of the first isolation portion includes at least one of aluminum, copper and silver; Preferably, the material of the barrier portion includes at least one of titanium and molybdenum; Preferably, the first isolation portion is electrically connected to the second electrode.

18. The display panel according to claim 16, characterized in that: The material of the second isolation portion includes a conductive material; Preferably, the material of the second isolation portion includes at least one of titanium and molybdenum; Preferably, at least one of the first isolation portion and the second isolation portion is electrically connected to the second electrode.

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

20. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1-19.

Images