Display panel and display device

Abstract

This application relates to the field of display technology, and provides a display panel and display device. The display panel includes a substrate, an isolation structure, and a display functional layer. The isolation structure is located on one side of the substrate and encloses multiple isolation openings. The display functional layer includes multiple spaced-apart light-emitting devices, at least a portion of which are disposed within the isolation openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked together. The first electrode is located between the substrate and the light-emitting functional layer, and the second electrode is located on the side of the light-emitting functional layer facing away from the substrate. The first electrode has a reflective surface. At least a portion of the light-emitting devices located on the side of the reflective surface facing away from the substrate form a microcavity, and the order of the microcavity is greater than or equal to three. The display panel provided by this application improves both the light-emitting effect and the performance of the device.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat panel displays based on OLED technology are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, power saving, thin body, and wide application range, becoming the mainstream display device. In the traditional display panel manufacturing process, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also has problems such as limited precision, high development costs, and long development cycles. Fine metal mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance aspects, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A, and CN118781966A describe relevant content on the technology of not using fine metal masks, and are provided for reference.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] This application provides a display panel and a display device to improve the performance of the display panel to at least a certain extent.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, a display panel is provided, including a substrate, an isolation structure, and a display functional layer. The isolation structure is located on one side of the substrate and encloses a plurality of isolation openings. The display functional layer includes a plurality of spaced-apart light-emitting devices. At least a portion of the light-emitting devices is disposed within the isolation openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked together. The first electrode is located between the substrate and the light-emitting functional layer, and the second electrode is located on the side of the light-emitting functional layer facing away from the substrate. The first electrode has a reflective surface. At least a portion of the light-emitting device located on the side of the reflective surface facing away from the substrate forms a microcavity, and the order of the microcavity is greater than or equal to three.

[0006] In the display panel provided in this application embodiment, by making the order of the microcavity formed in the light-emitting device greater than or equal to three, the light-emitting effect of the light-emitting device can be optimized, making the display effect of the display panel better, and also helping to improve the service life of the display panel.

[0007] Optionally, the light-emitting functional layer includes at least a hole transport layer, a light-emitting layer, and an electron transport layer stacked together, and the thickness of at least one of the hole transport layer and the electron transport layer is greater than the thickness of the light-emitting layer along a direction perpendicular to the plane of the substrate.

[0008] Optionally, the light-emitting device has a first light-emitting device and a second light-emitting device with different light-emitting colors. The first light-emitting device is used to emit light of a first color, and the second light-emitting device is used to emit light of a second color. The resonant wavelength of the first color light is smaller than the resonant wavelength of the second color light.

[0009] Wherein, along the direction perpendicular to the plane where the substrate is located, the thickness of the microcavity of the first light-emitting device is a first thickness, the thickness of the microcavity of the second light-emitting device is a second thickness, and the first thickness is less than the second thickness.

[0010] Optionally, the first color light is blue, and the second color light is green.

[0011] Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0012] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0013] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0014] Optionally, the first color light is blue, and the second color light is red.

[0015] Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0016] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0017] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0018] Optionally, the first color light is green, and the second color light is red.

[0019] Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0020] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0021] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0022] Optionally, the light-emitting device further comprises a third light-emitting device for emitting a third color light, wherein the resonant wavelength of the second color light is smaller than the resonant wavelength of the third color light;

[0023] Wherein, along the direction perpendicular to the plane where the substrate is located, the thickness of the microcavity of the third light-emitting device is the third thickness, and the second thickness is less than the third thickness.

[0024] Optionally, the first color light is blue, the second color light is green, and the third color light is red.

[0025] Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to The third thickness is greater than or equal to

[0026] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to The third thickness is greater than or equal to

[0027] Optionally, the first thickness is greater than or equal to The second thickness is greater than or equal to The third thickness is greater than or equal to

[0028] Optionally, the microcavity of the light-emitting device is of the third order.

[0029] Optionally, the microcavity satisfies the following formula:

[0030]

[0031] Where n is the effective refractive index, and d is the thickness of the microcavity along the direction perpendicular to the plane of the substrate. λ is the phase shift dimension, m is the order of the microcavity, and λ is the target resonant wavelength.

[0032] Optionally, the value of n can range from 1.5 to 2.0.

[0033] Optionally, the value of n can be in the range of 1.7 to 1.8.

[0034] Optionally, when the light-emitting device emits blue light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0035] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0036] Optionally, when the light-emitting device emits green light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0037] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0038] Optionally, when the light-emitting device emits red light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0039] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0040] Optionally, the microcavity of the light-emitting device is of order four.

[0041] Optionally, when the light-emitting device emits blue light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0042] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0043] Optionally, when the light-emitting device emits green light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0044] Optionally, when the light-emitting device emits red light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0045] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0046] Optionally, the microcavity of the light-emitting device is of order five.

[0047] Optionally, when the light-emitting device emits blue light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0048] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0049] Optionally, when the light-emitting device emits green light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0050] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0051] Optionally, when the light-emitting device emits red light, the thickness range of the microcavity of the light-emitting device is [missing information].

[0052] Optionally, the thickness range of the microcavity of the light-emitting device is [missing information].

[0053] Optionally, along a direction perpendicular to the substrate, the distance between the side of the second electrode facing away from the substrate and the reflective surface is a first distance, and the distance between the side of the light-emitting layer facing the substrate and the reflective surface is a second distance, wherein the second distance is greater than or equal to 1 / 5 of the first distance.

[0054] Optionally, the second distance is less than or equal to 3 / 10 of the first distance.

[0055] Optionally, the second distance is 1 / 4 of the first distance.

[0056] Optionally, the distance between the side of the second electrode facing away from the substrate and the side of the light-emitting layer facing away from the substrate is a third distance, and the third distance is less than or equal to 4 / 5 of the first distance.

[0057] Optionally, the third distance is less than or equal to 3 / 4 of the first distance.

[0058] Optionally, the second distance is greater than or equal to 3 / 5 of the first distance.

[0059] Optionally, the second distance is less than or equal to 9 / 10 of the first distance.

[0060] Optionally, the second distance is 3 / 4 of the first distance.

[0061] Optionally, the distance between the side of the second electrode facing away from the substrate and the side of the light-emitting layer facing away from the substrate is a third distance, and the third distance is less than or equal to 2 / 5 of the first distance.

[0062] Optionally, the third distance is less than or equal to 1 / 4 of the first distance.

[0063] Optionally, the hole transport layer is located on the side of the light-emitting layer facing the substrate, and the electron transport layer is located on the side of the light-emitting layer facing away from the substrate.

[0064] Optionally, the electron transport layer overlaps with a portion of the sidewall of the isolation structure facing the isolation opening.

[0065] Optionally, along a direction perpendicular to the plane of the substrate, the orthographic projection of one end of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the hole transport layer on the substrate.

[0066] Optionally, along a direction perpendicular to the plane of the substrate, the orthographic projection of one end of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the light-emitting layer on the substrate.

[0067] Optionally, along a direction perpendicular to the plane of the substrate, the orthographic projection of one end of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the electron transport layer on the substrate.

[0068] Optionally, along a direction perpendicular to the plane of the substrate, the orthographic projection of one end of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the light-emitting functional layer on the substrate.

[0069] Optionally, the light-emitting functional layer further includes a functional material layer, which is located between the hole transport layer and the light-emitting layer.

[0070] Optionally, the light-emitting functional layer further includes a hole injection layer located on the side of the hole transport layer facing the substrate.

[0071] Optionally, the light-emitting functional layer further includes a hole-blocking layer located between the light-emitting layer and the electron transport layer.

[0072] Optionally, the light-emitting functional layer further includes an electron injection layer located on the side of the electron transport layer facing away from the substrate.

[0073] Optionally, the display panel further includes a pixel definition layer, which is located between the substrate and the isolation structure. The pixel definition layer has pixel openings, which are correspondingly disposed and connected to the isolation openings.

[0074] The first electrode is located between the substrate and the pixel definition layer, and a portion of its surface is exposed relative to the pixel opening. The light-emitting functional layer covers the pixel opening and is in contact with the first electrode. The second electrode covers at least a portion of the surface of the light-emitting functional layer on the side facing away from the substrate and overlaps with the side of the isolation structure facing the isolation opening.

[0075] Optionally, the display panel further includes an encapsulation layer located on the side of the isolation structure and the display functional layer facing away from the substrate, the encapsulation layer defining a closed chamber on the side of the isolation structure facing the isolation opening.

[0076] Optionally, the encapsulation layer includes a first encapsulation sub-part and a second encapsulation sub-part connected together, the first encapsulation sub-part covering at least a portion of the sidewall of the isolation structure facing the isolation opening, and the second encapsulation sub-part covering the side of the light-emitting device facing away from the substrate;

[0077] The closed chamber is defined at least at the connection between the first encapsulation sub-part and the second encapsulation sub-part.

[0078] Optionally, the first encapsulation sub-part and the second encapsulation sub-part are connected to form a closed region, and the closed region is located on the side of the closed chamber near the center of the isolation opening along a direction parallel to the plane of the substrate.

[0079] Optionally, within different isolation openings, the width of the closed region is positively correlated with the thickness of the microcavity of the light-emitting device.

[0080] Optionally, the encapsulation layer further includes a third encapsulation sub-part connected to the first encapsulation sub-part, the third encapsulation sub-part being located on the side of the isolation structure facing away from the substrate.

[0081] Optionally, a gap exists between the third encapsulation sub-part and the isolation structure along a direction perpendicular to the plane of the substrate.

[0082] Optionally, the isolation structure includes a first isolation portion and a second isolation portion arranged in layers, the second isolation portion being located on the side of the first isolation portion facing away from the substrate, and the first isolation portion and the second isolation portion forming the isolation opening;

[0083] Wherein, the orthographic projection of the first isolation portion on the substrate is located within the orthographic projection of the second isolation portion on the substrate.

[0084] Optionally, the first isolation portion includes a first isolation sub-portion and a second isolation sub-portion, wherein the second isolation sub-portion is located on the side of the first isolation sub-portion facing away from the substrate;

[0085] Wherein, the orthographic projection of the second isolation sub-part on the substrate is located within the orthographic projection of the first isolation sub-part on the substrate.

[0086] Optionally, the orthographic projection of the end of the second isolation sub-part near the second isolation portion on the substrate is located within the orthographic projection of the end of the second isolation sub-part near the first isolation sub-part on the substrate.

[0087] Optionally, the material of the first isolator sub-section includes molybdenum.

[0088] Optionally, the material of the second isolation sub-section includes aluminum.

[0089] Optionally, the material of the second isolation portion includes titanium.

[0090] Optionally, the display panel further includes a polarization layer located on the side of the light-emitting device facing away from the substrate.

[0091] Optionally, the polarization layer includes a plurality of polarization sub-parts, and along a direction perpendicular to the substrate, the orthogonal projection of the polarization sub-parts on the substrate at least partially coincides with the orthogonal projection of the light-emitting device on the substrate.

[0092] In a second aspect, this application also provides a display panel, including a substrate, an isolation structure, and a display functional layer. The isolation structure is located on one side of the substrate and encloses a plurality of isolation openings. The display functional layer includes a plurality of spaced-apart light-emitting devices, at least a portion of which is disposed within the isolation openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked together. The first electrode is located between the substrate and the light-emitting functional layer, and the second electrode is located on the side of the light-emitting functional layer facing away from the substrate. The first electrode has a reflective surface, and the distance between the side of the light-emitting device facing away from the substrate and the reflective surface is greater than or equal to...

[0093] In the display panel provided in this application embodiment, by adjusting the distance between the side of the light-emitting device facing away from the substrate and the reflective surface formed in the first electrode, the light-emitting effect of the light-emitting device can be optimized, thereby improving the display effect of the display panel and increasing the service life of the display panel.

[0094] In a third aspect, this application also provides a display device including the display panel described in any of the preceding claims.

[0095] The beneficial effects of the display panel and display device provided in this application are as follows: Compared with related technologies, the display panel provided in this application can improve the light emission effect of the light-emitting device by adjusting the thickness of some film layers constituting the light-emitting functional layer, such as adjusting the thickness of the hole transport layer and / or electron transport layer to be greater than the thickness of the light-emitting layer and making the microcavity order of the light-emitting device greater than or equal to three. This improves the display effect of the display panel and also helps to extend the service life of the display panel, giving the display panel better performance.

[0096] The display device provided in this application includes the above-mentioned display panel. Therefore, the display device has the beneficial effects of including at least one or more of the above-mentioned display panels. The specific effects are as described above and will not be repeated here. Attached Figure Description

[0097] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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.

[0098] Figure 1 This is a schematic diagram of the planar structure of the display surface provided in the embodiments of this application;

[0099] Figure 2 for Figure 1 The diagram shows an enlarged view of the structure of area A in the display panel.

[0100] Figure 3 for Figure 2 The diagram shows a first cross-sectional structure of the display panel.

[0101] Figure 4 for Figure 3 Enlarged view of the structure of region B in the middle;

[0102] Figure 5 for Figure 3 Another enlarged view of the structure of region B in the middle;

[0103] Figure 6 for Figure 2 The diagram shows a second cross-sectional structure of the display panel.

[0104] Figure 7 for Figure 6 Enlarged view of the structure of region C;

[0105] Figure 8 This is a schematic diagram of the planar structure of the display device provided in the embodiments of this application.

[0106] The following are the labeling elements in the figure:

[0107] 100. Display device; 10. Display panel;

[0108] 1. Substrate; 2. Isolation structure; 201. Isolation opening; 21. First isolation portion; 211. First isolation sub-portion; 212. Second isolation sub-portion; 22. Second isolation portion; 3. Light-emitting device; 31. First electrode; 311. Reflective surface; 32. Light-emitting functional layer; 321. Hole transport layer; 322. Light-emitting layer; 323. Electron transport layer; 324. Functional material layer; 325. Hole injection layer; 326. Hole blocking layer; 327. Electron injection layer; 33. Second electrode; 3001. Microcavity; 301. First light-emitting device; 302. Second light-emitting device; 303. Third light-emitting device; 4. Pixel definition layer; 401. Pixel opening; 5. Encapsulation layer; 501. Closed chamber; 502. Closed area; 51. First encapsulation sub-portion; 52. Second encapsulation sub-portion; 53. Third encapsulation sub-portion. Detailed Implementation

[0109] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0110] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0111] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0112] Furthermore, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features or their execution order, and the terms "first" and "second" are not necessarily different. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0113] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0114] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0115] As used herein, the term "substrate" refers to a material on which subsequent material layers are added to provide a support substrate for the layers above. In some embodiments, the substrate may be flexible, stretchable, foldable, bendable, or rollable, such that the display panel may be flexible, stretchable, foldable, bendable, or rollable. The substrate material may be formed from any suitable insulating material that is flexible, such as polyimide (PI), polycarbonate (P), polyethersulfone (PES), or polymeric materials such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyaryl compounds (PR), or glass fiber reinforced plastic (FRP). The substrate may be transparent, translucent, or opaque. In other embodiments, the substrate may also be rigid, made of a rigid insulating material, such as metal, ultrathin glass, plastic, or sapphire wafer. The substrate itself may be patterned. The material added to the substrate can be patterned, or it can remain unpatterned.

[0116] The terms "layer" or "element" used in this document can refer to a structural or functional layer of a certain thickness and covering a certain area, composed of different materials that make up the structure of a display panel. A layer or element can extend over a complete layer or element structure located below or above, or have a smaller extent than the layer or element structure located below or above. It should be noted that the dimensions of layers and areas may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when a layer or element is referred to as being "on" another layer or element, it can be directly on the other layer or element, or it can be a layer located between two structures. Additionally, it is understood that when a layer or element is referred to as being "below" another layer or element, it can be directly below the other layer or element, or it can be more than one intermediate layer or element. It is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between two layers or two elements, or it can be more than one intermediate layer or element. Moreover, a layer or element can be a region of a homogeneous or non-homogeneous continuous structure with a thickness less than the thickness of that continuous structure. For example, the layer may be located between the top and bottom surfaces of the continuous structure or between any pair of lateral planes at the top and bottom surfaces. The layer may extend laterally, vertically, and / or along a tapered surface. The substrate may be a layer, and may include one or more layers. For example, the interconnect layer may include one or more conductor and contact layers (forming contacts, interconnects, and / or vias therein) and one or more dielectric layers.

[0117] The display panel 10 includes an isolation structure 2, which separates the display functional layer to form spaced-apart light-emitting devices 3. This ensures that adjacent light-emitting devices 3 do not interfere with each other, thus improving the display effect of the display panel 10. However, after long-term research, the inventors have found that the display performance of existing light-emitting devices 3 is insufficient to meet the needs of high-end display devices. For example, high-end display devices may include professional monitors, high-end televisions, VR (Virtual Reality) devices, AR (Augmented Reality) devices, automotive display devices, and smart wearable glasses.

[0118] Based on this, the present application provides a display panel 10 and a display device 100 to at least alleviate or improve the above-mentioned technical problems, improve the display effect of the display panel 10, and make it have better performance.

[0119] Please see Figures 1-3 This application provides a display panel 10, which includes a substrate 1, an isolation structure 2 and a display functional layer. The isolation structure 2 is located on one side of the substrate 1 and encloses a plurality of isolation openings 201. The display functional layer includes a plurality of spaced light-emitting devices 3, at least a portion of which are disposed within the isolation openings 201.

[0120] For details, please refer to Figure 2 and Figure 3 The portion of the film layer of the light-emitting device 3 located within the isolation opening 201 is spaced apart from the isolation structure 2.

[0121] Please see Figure 3 The light-emitting device 3 includes a first electrode 31, a light-emitting functional layer 32, and a second electrode 33 stacked together. The first electrode 31 is located between the substrate 1 and the light-emitting functional layer 32, and the second electrode 33 is located on the side of the light-emitting functional layer 32 facing away from the substrate 1. The first electrode 31 has a reflective surface 311. The portion of the light-emitting device 3 located on the side of the reflective surface 311 facing away from the substrate 1 forms a microcavity 3001, and the order of the microcavity 3001 is greater than or equal to three.

[0122] Optionally, please refer to Figure 4 The light-emitting functional layer 32 located between the first electrode 31 and the second electrode 33 includes at least a hole transport layer 321, a light-emitting layer 322 and an electron transport layer 323 stacked together. Along the direction perpendicular to the plane of the substrate 1, the thickness of at least one of the hole transport layer 321 and the electron transport layer 323 is greater than the thickness of the light-emitting layer 322.

[0123] In the display panel 10 provided in this application embodiment, by setting the thickness of at least one of the hole transport layer 321 and electron transport layer 323 constituting the light-emitting device 3 to be greater than the thickness of the light-emitting layer 322, the order of the microcavity 3001 formed in the light-emitting device 3 can be greater than or equal to three, thereby optimizing the light-emitting effect of the light-emitting device 3, making the display effect of the display panel 10 better, and also helping to improve the service life of the display panel 10.

[0124] The aforementioned microcavity 3001 refers to a structure located within the light-emitting device 3 that enables the light emitted by the light-emitting device 3 to produce the microcavity 3001 effect. Light emitted from the light-emitting functional layer 32 of the light-emitting device 3 can be emitted after multiple reflections and interferences within the microcavity 3001, thereby improving the light-emitting effect of the light-emitting device 3. Based on the microcavity 3001 structure, the wavelength, intensity distribution, and emission angle of the light emitted from the light-emitting functional layer 32 in the light-emitting device 3 can all be adjusted, thereby achieving the effects of improving luminous efficiency, improving color purity, and realizing specific light-emitting modes.

[0125] The resonant wavelength refers to the wavelength of light that, under specific conditions, produces a resonance phenomenon when light propagates within an optical system with resonant characteristics, such as the microcavity 3001 mentioned above.

[0126] Specifically, when light travels back and forth within the microcavity 3001 for one cycle, and the optical path difference is exactly an integer multiple of the wavelength, constructive interference occurs, enhancing the light of that wavelength. This specific wavelength is called the resonant wavelength. In the light-emitting device 3, the resonant wavelength plays a crucial role in its luminous efficiency and color rendering performance. By adjusting the structure and parameters of the microcavity 3001, the light-emitting device 3 can achieve efficient light emission at a specific resonant wavelength.

[0127] For example, by rationally designing the structure of the microcavity 3001, light of a specific wavelength can form constructive interference within the microcavity 3001, enhancing the emission intensity of that wavelength of light, while light of other wavelengths may be suppressed due to destructive interference, thereby achieving narrowband light emission and improving the color saturation of the light emitted by the light-emitting device 3.

[0128] For example, by rationally designing the microcavity 3001 structure, the direction of light propagation can be controlled, allowing more light to be emitted from the light-emitting device 3 at an angle favorable for emission, reducing the absorption and scattering losses of light inside the light-emitting device 3, thereby improving the overall light emission efficiency of the light-emitting device 3, reducing power consumption, and increasing display brightness.

[0129] Based on the interference modes of light within the microcavity 3001, the order can be used to describe the optical characteristics of the microcavity 3001. Physically speaking, the order of the microcavity 3001 represents the relationship between the optical path difference and the wavelength during a round trip of light propagating along a specific path within the microcavity 3001. When the order requirement is met, light can form stable interference modes within the microcavity 3001.

[0130] Corresponding to different orders, light exhibits different interference maxima and minima distributions within the microcavity 3001, thus determining the microcavity 3001's selectivity and enhancement characteristics for different wavelengths of light. For example, when the order is one, the first-order microcavity 3001 has a specific interference enhancement effect on light of a particular wavelength; when the order is two, the interference characteristics and light control effect of the second-order microcavity 3001 differ from the first-order mode. Furthermore, as the order of the microcavity 3001 increases, its spectral selectivity becomes more refined, and the number and position of interference peaks change accordingly, enabling more complex optical control functions.

[0131] It is also important to note that microcavities 3001 of the same order, fabricated based on different variations and combinations of film thickness, will exhibit different luminous effects. These differences primarily manifest in luminous intensity, spectral characteristics, and emission angle. For example, regarding luminous intensity, when the microcavity 3001's structural design allows for constructive interference of light within it, it enhances the luminous intensity of the corresponding light-emitting device 3. Furthermore, when the microcavity 3001's structural design induces different interferences within it, the spectrum changes, enabling precise spectral control. This can be achieved through multi-peak spectra or broadband spectra within specific wavelength ranges to meet diverse optical application requirements. Finally, when the microcavity 3001's structural design increases or decreases the emission angle within it, different emission modes, such as wide-angle emission or narrow-angle focusing, can be realized to adapt to various display and lighting scenarios.

[0132] In the embodiments of this application, the prepared third-order microcavity 3001 has a high external coupling efficiency, thus achieving higher luminous efficiency; in terms of emission spectrum, it is easier to obtain a narrower emission spectrum under the same wavelength conditions, thereby achieving higher color purity. In addition, the emission wavelength can be controlled more precisely; in terms of angular color stability, its wavelength shift is small within a certain angular range, exhibiting better angular color stability; in terms of operational lifespan, its operational stability is longer as the size of the microcavity 3001 increases.

[0133] Please see Figure 3The reflective surface 311 formed on the first electrode 31 can be located on the side of the first electrode 31 facing away from the substrate 1, or it can be located at the middle position of the first electrode 31 in the thickness direction. For ease of observation, the accompanying drawings of this application show the reflective surface 311 as the side of the first electrode 31 facing away from the substrate 1. Of course, Figure 3 The structure of the reflective surface 311 is only schematic and is not intended to limit the actual formation location of the reflective surface 311.

[0134] For example, please refer to Figure 3 The material of the first electrode 31 includes metallic silver. Therefore, the first electrode 31 includes a silver metal layer, and the reflective surface 311 can be formed on the side surface of the silver metal layer facing away from the substrate 1.

[0135] For example, the material of the first electrode 31 also includes indium tin oxide (ITO), forming an ITO layer. ITO material has good conductivity, providing a smooth transport channel for charge carriers (holes), allowing holes to be smoothly injected from the first electrode 31 into the light-emitting functional layer 32. ITO material also has high light transmittance; the ITO layer covers the side of the silver metal layer facing away from the substrate 1, at which point the reflective surface 311 can be formed at the contact surface between the silver metal layer and the ITO layer.

[0136] For example, the material of the first electrode 31 may also include indium zinc oxide (IZO), forming an IZO layer. IZO is a transparent conductive oxide that can be used as a substitute for ITO, exhibiting similar high light transmittance. Furthermore, IZO offers better flexibility and mechanical stability, making it suitable for use in flexible display panels 10 compared to ITO. When using an IZO layer instead of an ITO layer, the IZO layer covers the side of the silver metal layer facing away from the substrate 1, at which point a reflective surface 311 can be formed at the contact surface between the silver metal layer and the IZO layer.

[0137] In order to reduce the leakage current problem of the light-emitting functional layer 32 under the power-on state and further improve the display effect, the light-emitting functional layer 32 and the isolation structure 2 are set at intervals. At this time, in the direction perpendicular to the plane of the substrate 1, the orthographic projection of the end of the isolation structure 2 near the substrate 1 on the substrate 1 and the orthographic projection of the light-emitting functional layer 32 on the substrate 1 are set at intervals.

[0138] Please see Figure 4The stacked light-emitting functional layer 32 includes a hole transport layer 321 (HTL), a light-emitting layer 322 (EML), and an electron transport layer 323 (ETL) along its thickness direction (i.e., the direction perpendicular to the plane where the substrate 1 is located). The hole transport layer 321 is located on the side of the light-emitting layer 322 facing the substrate 1 and is located between the light-emitting layer 322 and the first electrode 31. The electron transport layer 323 is located on the side of the light-emitting layer 322 facing away from the substrate 1 and is located between the light-emitting layer 322 and the second electrode 33.

[0139] Hole transport layer 321 is used to transport holes injected from the first electrode 31, enabling the holes to reach the light-emitting layer 322; the light-emitting layer 322 is used to emit light under energized conditions, and its emission color varies depending on the material; electron transport layer 323 is used to transport electrons injected from the second electrode 33, enabling the electrons to reach the light-emitting layer 322. The light-emitting layer 322 can be made of organic light-emitting materials or the like.

[0140] Specifically, the orthographic projection of the end of the isolation structure 2 near the substrate 1 on the substrate 1 is spaced apart from the orthographic projection of the hole transport layer 321 on the substrate 1.

[0141] Specifically, the orthographic projection of the end of the isolation structure 2 near the substrate 1 on the substrate 1 is spaced apart from the orthographic projection of the light-emitting layer 322 on the substrate 1.

[0142] Specifically, the orthographic projection of the end of the isolation structure 2 near the substrate 1 on the substrate 1 is spaced apart from the orthographic projection of the electron transport layer 323 on the substrate 1.

[0143] Of course, in some cases, the electron transport layer 323 can also be configured to overlap with a portion of the sidewall of the isolation structure 2 facing the isolation opening 201. The overlap between the electron transport layer 323 located on the side of the light-emitting layer 322 facing away from the substrate 1 and the isolation structure 2 will not cause leakage defects.

[0144] Please see Figure 4 Taking the third-order microcavity 3001 as an example, the relative thicknesses of the hole transport layer 321, the light-emitting layer 322, and the electron transport layer 323 in the light-emitting functional layer 32 constituting the light-emitting device 3 are explained.

[0145] Using the reflective surface 311 formed on the first electrode 31 as a boundary, along a direction perpendicular to the substrate 1, the distance between the side of the second electrode 33 facing away from the substrate 1 and the reflective surface 311 is the first distance (the first distance is the thickness of the microcavity 3001), and the distance between the side of the light-emitting layer 322 facing the substrate 1 and the reflective surface 311 is the second distance. The second distance is greater than or equal to 1 / 5 of the first distance, and less than or equal to 3 / 10 of the first distance. At this time, the thickness of the hole transport layer 321 and the thickness of the light-emitting layer 322 remain unchanged, while the thickness of the electron transport layer 323 increases.

[0146] Specifically, the second distance is 1 / 4 of the first distance. The distance between the side of the second electrode 33 facing away from the substrate 1 and the side of the light-emitting layer 322 facing away from the substrate 1 is set as the third distance. In this case, the third distance is less than or equal to 4 / 5 of the first distance.

[0147] Specifically, the third distance can be further restricted to be less than or equal to 3 / 4 of the first distance.

[0148] In this embodiment, the increased thickness of the electron transport layer 323 not only alters the order of the microcavity 3001, increasing its order, but also enhances electron transport capability, thereby increasing luminescence intensity. Furthermore, it influences carrier recombination positions and electric field distribution within the luminescent layer 322 to some extent. If electron transport accelerates, the recombination region becomes closer to the interface between the luminescent layer 322 and the hole transport layer 321, causing changes in the wavelength and bandwidth of the spectrum, ultimately adjusting color purity. Simultaneously, these changes can alter the scattering and propagation paths of light within microwaves, thereby adjusting the emission angle to a certain extent.

[0149] When the thickness of each film layer in the light-emitting functional layer 32 is adjusted to increase the thickness of the hole transport layer 321 while keeping the thicknesses of the light-emitting layer 322 and the electron transport layer 323 unchanged, the second distance mentioned above is greater than or equal to 3 / 5 of the first distance.

[0150] Specifically, the second distance is less than or equal to 9 / 10 of the first distance. At this time, the third distance is less than or equal to 2 / 5 of the first distance, and the size of the third distance gradually decreases as the size of the second distance increases.

[0151] You can set the second distance to 3 / 4 of the first distance. In this case, the third distance will be less than or equal to 1 / 4 of the first distance.

[0152] In this embodiment, the thickness variation of the hole transport layer 321 can also affect the display effect of the light-emitting device 3 in terms of luminous intensity, spectral characteristics and luminous angle, which will not be elaborated here.

[0153] Of course, the thickness of the hole transport layer 321 and the electron transport layer 323 can be increased as needed, while the thickness of the light-emitting layer 322 remains unchanged. The relative relationships between the first distance, the second distance, and the third distance vary depending on the actual thickness of the hole transport layer 321 and the electron transport layer 323.

[0154] For details, please refer to Figure 5 The light-emitting functional layer 32 also includes other film layers, such as at least one of the functional material layer 324 (Prime), hole injection layer 325 (HIL), hole blocking layer 326 (HBL), and electron injection layer (EIL).

[0155] Specifically, the functional material layer 324 is located between the hole transport layer 321 and the light-emitting layer 322, and is used to optimize the performance of the light-emitting layer 322. Its material composition changes with the material of the light-emitting layer 322.

[0156] Specifically, the hole injection layer 325 is located on the side of the hole transport layer 321 facing the substrate 1, that is, between the hole transport layer 321 and the first electrode 31, and is used to reduce the potential barrier for holes to be injected from the first electrode 31 into the light-emitting layer 322 and improve the hole injection efficiency.

[0157] Specifically, the hole blocking layer 326 is located between the light-emitting layer 322 and the electron transport layer 323, and is used to prevent holes from diffusing from the hole transport layer 321 to the electron transport layer 323, so that electrons and holes can recombine effectively in the light-emitting layer 322.

[0158] Specifically, the electron injection layer 327 is located on the side of the electron transport layer 323 facing away from the substrate 1, that is, between the electron transport layer 323 and the second electrode 33, and is used to reduce the potential barrier for electrons to be injected from the second electrode 33 into the light-emitting layer 322 and improve the electron injection efficiency.

[0159] Depending on the material of the light-emitting layer 322, the light-emitting device 3 can emit light of different colors when energized.

[0160] Specifically, the light-emitting device 3 has a first light-emitting device 301 and a second light-emitting device 302 with different light-emitting colors. The first light-emitting device 301 is used to emit light of the first color, and the second light-emitting device 302 is used to emit light of the second color. The resonant wavelength of the first color light is smaller than the resonant wavelength of the second color light.

[0161] Please see Figure 3Along the direction perpendicular to the plane where the substrate 1 is located, the thickness of the microcavity 3001 of the first light-emitting device 301 is the first thickness, and the thickness of the microcavity 3001 of the second light-emitting device 302 is the second thickness, and the first thickness is less than the second thickness.

[0162] For example, when the first color light is blue and the second color light is green, the first thickness is greater than or equal to Preferred to be greater than or equal to The second thickness is greater than or equal to Preferred to be greater than or equal to

[0163] Specifically, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0164] The order of the microcavity 3001 is affected by its thickness. Under the condition that the emission color is the same, the order of the microcavity 3001 is directly proportional to its thickness.

[0165] Since the emitted light from the first light-emitting device 301 is different from that from the second light-emitting device 302, under the same order, the larger the wavelength of the light-emitting device 3, the greater the thickness of its microcavity 3001.

[0166] In this embodiment, the microcavity 3001 satisfies the following formula:

[0167]

[0168] Where n is the effective refractive index (in some cases, it can also be written as n0). eff ), where d is the thickness of the microcavity 3001 along the direction perpendicular to the plane of substrate 1. λ is the phase shift dimension, m is the order of the microcavity 3001, and λ is the target resonant wavelength.

[0169] Specifically, the effective refractive index refers to the refractive index of the medium within the microcavity 3001. It represents the ratio of the speed of light propagating in this medium to the speed of light in a vacuum. Different materials have different refractive indices; the refractive index of common organic materials is generally around 1.5 to 2.0. In this embodiment, the value of n can be set to a range of 1.5 to 2.0, for example, n can be any value among 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, etc. In other similar embodiments, the value of n can be set to a range of 1.7 to 1.8 depending on the material.

[0170] Specifically, phase shift refers to the phase shift generated by light at the microcavity 3001 reflection interface. Its magnitude is related to factors such as the material and structure of the reflection interface and the incident angle of the light, and its actual value can be obtained through measurement. Alternatively, it can be calculated based on Fresnel's formula, and the calculation method has been disclosed in related technologies. Of course, the phase shift dimension can also be set to 0.

[0171] It is important to note that m is a positive integer. In actual calculations, if the calculated m is a non-positive integer when other terms are known, it needs to be rounded down, or further analysis needs to be performed based on the specific circumstances.

[0172] Define the resonant wavelength of the first color light as 435.8 nm, then the first thickness of the first light-emitting device 301 with a third-order microcavity 3001 structure is... Considering processing errors, its thickness is approximately

[0173] Specifically, the first thickness range of the first light-emitting device 301 with a third-order microcavity 3001 is... The machining error at this point is ±20%.

[0174] Specifically, the first thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the first light-emitting device 301 is three.

[0175] When calculating the thickness of the microcavity 3001, let n be 1.7. The value is 0.

[0176] With the resonant wavelength of the first color light remaining constant, when the order of the microcavity 3001 is fourth, the first thickness of the first light-emitting device 301 is [value missing]. Considering processing errors, its thickness is approximately

[0177] Specifically, the first thickness range of the first light-emitting device 301 with a fourth-order microcavity 3001 is...

[0178] Specifically, the first thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the first light-emitting device 301 is four.

[0179] With the resonant wavelength of the first color light remaining constant, when the order of the microcavity 3001 is fifth, the first thickness of the first light-emitting device 301 is [value missing]. Considering processing errors, its thickness is approximately

[0180] Specifically, the first thickness range of the first light-emitting device 301 with a fifth-order microcavity 3001 is...

[0181] Specifically, the first thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the first light-emitting device 301 is five.

[0182] Similarly, when the order of the microcavity 3001 is sixth or higher, the thickness of the first light-emitting device 301 is further increased.

[0183] Define the resonant wavelength of the second color light as 546.1 nm, then the second thickness of the second light-emitting device 302 with a third-order microcavity 3001 structure is... Considering processing errors, its thickness is approximately

[0184] Specifically, the second thickness range of the second light-emitting device 302 with the third-order microcavity 3001 is...

[0185] Specifically, the second thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the second light-emitting device 302 is three.

[0186] With the resonant wavelength of the second color light remaining constant, when the order of the microcavity 3001 is fourth, the second thickness of the second light-emitting device 302 is [value missing]. Considering processing errors, its thickness is approximately

[0187] Specifically, the second thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the second light-emitting device 302 is four.

[0188] With the resonant wavelength of the second color light remaining constant, when the order of the microcavity 3001 is fifth, the second thickness of the second light-emitting device 302 is [value missing]. Considering processing errors, its thickness is approximately

[0189] Specifically, the second thickness range of the second light-emitting device 302 with a fifth-order microcavity 3001 is...

[0190] Specifically, the second thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the second light-emitting device 302 is five.

[0191] Of course, it should be noted that when the order of the microcavity 3001 is the same, the second thickness of the second light-emitting device 302 is always greater than the first thickness of the first light-emitting device 301.

[0192] For example, when the first color light is blue and the second color light is red, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0193] Specifically, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0194] The first thickness of the first light-emitting device 301 with different orders can be found in the previous text.

[0195] Define the resonant wavelength of the second color light as 700 nm, then the second thickness of the second light-emitting device 302 with a third-order microcavity 3001 structure is... Considering processing errors, its thickness is approximately

[0196] Specifically, the second thickness range of the second light-emitting device 302 with the third-order microcavity 3001 is...

[0197] Specifically, the second thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the second light-emitting device 302 is three.

[0198] With the resonant wavelength of the second color light remaining constant, when the order of the microcavity 3001 is fourth, the second thickness of the second light-emitting device 302 is [value missing]. Considering processing errors, its thickness is approximately

[0199] Specifically, the second thickness range of the second light-emitting device 302 with the fourth-order microcavity 3001 is...

[0200] Specifically, the second thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the second light-emitting device 302 is four.

[0201] With the resonant wavelength of the second color light remaining constant, when the order of the microcavity 3001 is fifth, the second thickness of the second light-emitting device 302 is [value missing]. Considering processing errors, its thickness is approximately

[0202] Specifically, the second thickness range of the second light-emitting device 302 with a fifth-order microcavity 3001 is...

[0203] Specifically, the second thickness can be set to... Any value in the above, as long as it satisfies that the order of the microcavity 3001 of the second light-emitting device 302 is five.

[0204] Of course, it should be noted that when the order of the microcavity 3001 is the same, the second thickness of the second light-emitting device 302 is always greater than the first thickness of the first light-emitting device 301.

[0205] For example, when the first color light is green and the second color light is red, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0206] Specifically, the first thickness is greater than or equal to The second thickness is greater than or equal to

[0207] At this point, the first thickness of the first light-emitting device 301 with different orders and the second thickness of the second light-emitting device 302 with different orders can be referred to the previous text, and will not be repeated here.

[0208] Please see Figure 3 The light-emitting device 3 also has a third light-emitting device 303, which is used to emit a third color light. The resonant wavelength of the second color light is less than the resonant wavelength of the third color light. Along the direction perpendicular to the plane of the substrate 1, the thickness of the microcavity 3001 of the third light-emitting device 303 is the third thickness, and the second thickness is less than the third thickness.

[0209] For example, the first color light is blue, the second color light is green, the third color light is red, and the first thickness is greater than or equal to... The second thickness is greater than or equal to The third thickness is greater than or equal to

[0210] Specifically, the first thickness is greater than or equal to The second thickness is greater than or equal to The third thickness is greater than or equal to

[0211] The following section uses the third-order microcavity 3001 of the light-emitting device 3 as an example to illustrate the thickness of the microcavity 3001 in different light-emitting devices 3.

[0212] Define the resonant wavelength of the first color light as 435.8 nm, the resonant wavelength of the second color light as 546.1 nm, and the resonant wavelength of the third color light as 700 nm. Then, the first thickness range of the first light-emitting device 301 with a third-order microcavity 3001 is... It can be limited to (its thickness can be taken as) The second thickness range of the second light-emitting device 302 with a third-order microcavity 3001 is any value in the range of 3001. It can be limited to (its thickness can be taken as) The third thickness range of the third light-emitting device 303 with a third-order microcavity 3001 is any value in the range of 3001. It can be limited to (its thickness can be taken as) (any value in etc.)

[0213] For example, the order of the microcavity 3001 of the light-emitting device 3 is defined as fourth order: when the light-emitting color of the light-emitting device 3 is blue, the thickness range of the microcavity 3001 of the light-emitting device 3 is... Specifically, the thickness range of the light-emitting device 3 with a fourth-order microcavity 3001 is... (its thickness can be taken as) (Any value in etc.). When the light-emitting device 3 emits green light, the thickness range of the microcavity 3001 of the light-emitting device 3 is... (its thickness can be taken as) (Any value in etc.). When the light-emitting device 3 emits red light, the thickness range of the microcavity 3001 of the light-emitting device 3 is... Specifically, the thickness range of the light-emitting device 3 with a fourth-order microcavity 3001 is... (its thickness can be taken as) (any value in etc.)

[0214] For example, the order of the microcavity 3001 of the light-emitting device 3 is defined as fifth order: when the light-emitting color of the light-emitting device 3 is blue, the thickness range of the microcavity 3001 of the light-emitting device 3 is... Specifically, the thickness range of the light-emitting device 3 with a fifth-order microcavity 3001 is... (its thickness can be taken as) (any value in etc.); when the light-emitting color of the light-emitting device 3 is green, then the thickness range of the microcavity 3001 of the light-emitting device 3 is... Specifically, the thickness range of the light-emitting device 3 with a fifth-order microcavity 3001 is... (its thickness can be taken as) (any value in etc.); when the light-emitting color of the light-emitting device 3 is red, then the thickness range of the microcavity 3001 of the light-emitting device 3 is... Specifically, the thickness range of the light-emitting device 3 is... (its thickness can be taken as) (any value in etc.)

[0215] Please see Figure 3 The display panel 10 provided in this application embodiment also includes a pixel definition layer 4 located between the substrate 1 and the isolation structure 2. The pixel definition layer 4 has a pixel opening 401, which is correspondingly disposed and connected to the isolation opening 201.

[0216] Specifically, the pixel definition layer 4 is made of inorganic materials and can be used to define the pixel range, ensuring that each light-emitting device 3 located in different isolation openings 201 can remain independent of each other. At the same time, it can also block the water vapor formed in the substrate 1 and other film layers from eroding other related film layers located on the side of the pixel definition layer 4 facing away from the substrate 1, which helps to improve the reliability of the display panel 10.

[0217] In the direction perpendicular to the plane of substrate 1, the initial thickness of pixel definition layer 4 is basically the same at various positions.

[0218] The first electrode 31 constituting the light-emitting device 3 is located between the substrate 1 and the pixel definition layer 4. A portion of the surface of the first electrode 31 facing away from the substrate 1 is exposed through the pixel opening 401. The light-emitting functional layer 32 covers the surface of the pixel definition layer 4 facing away from the substrate 1 and passes through the pixel opening 401 to contact the first electrode 31. The second electrode 33 covers at least a portion of the surface of the light-emitting functional layer 32 facing away from the substrate 1 and overlaps with the side of the isolation structure 2 facing the isolation opening 201 to achieve electrical connection.

[0219] Specifically, when the overlap structure between the second electrode 33 and the isolation structure 2 is a double-sided overlap, the orthogonal projection of the light-emitting functional layer 32 on the substrate 1 is located within the orthogonal projection of the second electrode 33 on the substrate 1; when the overlap structure between the second electrode 33 and the isolation structure 2 is a single-sided overlap, the orthogonal projection of the light-emitting functional layer 32 on the substrate 1 and the orthogonal projection of the second electrode 33 on the substrate 1 partially overlap.

[0220] Specifically, the orthographic projection of the pixel opening 401 on the substrate 1 is located within the orthographic projection of the isolation opening 201 on the substrate 1.

[0221] Please see Figure 3In the direction perpendicular to the plane of the substrate 1, the overall cross-sectional shape of the isolation structure 2 formed between two adjacent isolation openings 201 is similar to a rectangular or trapezoidal structure, or its cross-sectional shape can also present a "wider at the top and narrower at the bottom" shape, i.e., an inverted trapezoid.

[0222] The isolation structure 2 can be a single-layer structure or a multi-layer structure.

[0223] In some embodiments, the isolation structure 2 is a stacked structure, including a first isolation portion 21 and a second isolation portion 22 arranged in a stacked manner, wherein the second isolation portion 22 is located on the side of the first isolation portion 21 facing away from the substrate 1, and the first isolation portion 21 and the second isolation portion 22 enclose and form an isolation opening 201.

[0224] Please see Figure 3 The orthographic projection of the first isolation portion 21 on the substrate 1 is located within the orthographic projection of the second isolation portion 22 on the substrate 1.

[0225] Specifically, the first isolation portion 21 can be a single-layer structure or a multi-layer structure. When the first isolation portion 21 is a multi-layer structure, it includes a first isolation sub-portion 211 and a second isolation sub-portion 212 stacked together, with the second isolation sub-portion 212 located on the side of the first isolation sub-portion 211 facing away from the substrate 1; wherein, the orthographic projection of the second isolation sub-portion 212 on the substrate 1 is located within the orthographic projection of the first isolation sub-portion 211 on the substrate 1.

[0226] In some embodiments, the second isolation sub-part 212 located between the first isolation sub-part 211 and the second isolation part 22 has a rectangular or trapezoidal structure.

[0227] Specifically, the second isolation sub-section 212 has a trapezoidal structure. The orthographic projection of the end of the second isolation sub-section 212 near the second isolation section 22 on the substrate 1 is located within the orthographic projection of the end of the second isolation sub-section 212 near the first isolation sub-section 211 on the substrate 1.

[0228] The sidewall of the second isolation sub-part 212 near the isolation opening 201 is offset relative to the sidewall of the second isolation part 22 and the sidewall of the first isolation sub-part 211 near the isolation opening 201 in a direction away from the center of the isolation opening 201, so as to form an undercut structure between the second isolation sub-part 212 and the second isolation part 22.

[0229] Of course, in other similar embodiments, the shape of the isolation structure 2 can also be adapted to the processing requirements.

[0230] It should be noted that the material of the aforementioned isolation structure 2 includes conductive material, so that the light-emitting devices 3 in adjacent isolation openings 201 can be electrically connected through the isolation structure 2, so as to facilitate independent control of different light-emitting devices 3 in the display panel 10.

[0231] Specifically, the material of the second isolation section 22 includes titanium, forming a titanium metal layer; the material of the second isolation subsection 212 includes aluminum, forming an aluminum metal layer; and the material of the first isolation subsection 211 includes molybdenum, forming a molybdenum metal layer.

[0232] Since the light-emitting device 3 needs to be connected to the isolation structure 2 to achieve electrical connection, the thickness of the first isolation sub-part 211 located on the side of the isolation structure 2 near the substrate 1 should not be too thick, so as not to affect the integrity of the relevant conductive film layer (such as the second electrode 33).

[0233] Please see Figure 6 The display panel 10 provided in this embodiment of the application further includes an encapsulation layer 5, which is used to encapsulate the isolation structure 2 and the display function layer.

[0234] Specifically, the encapsulation layer 5 is located on the side of the isolation structure 2 and the display function layer facing away from the substrate 1.

[0235] The display functional layer includes multiple spaced-apart light-emitting devices 3. Since the microcavities 3001 within the light-emitting devices 3 in this embodiment have an order greater than or equal to three, and the thickness of the light-emitting functional layer 32 constituting the light-emitting devices 3 is increased, the sealing difficulty of the encapsulation layer 5 at the isolation opening 201 is reduced due to the increased thickness of the light-emitting devices 3, while other structures remain unchanged. During the fabrication of the encapsulation layer 5, the encapsulation material attached to the sidewall of the isolation structure 2 facing the isolation opening 201 and the encapsulation material attached to the side of the light-emitting devices 3 facing away from the substrate 1 gradually thicken and approach each other as the encapsulation process progresses, making it easier to achieve mutual contact and sealing. A closed cavity 501 can be formed within the sealed area. Furthermore, as the encapsulation process continues, the thickness of the sealing area outside the closed cavity 501 gradually increases, which not only helps improve the encapsulation effect of the encapsulation layer 5 and reduces the possibility of display dark spots on the display panel 10 due to encapsulation defects, but also reduces the possibility of etching damage to the encapsulation layer 5 caused by subsequent etching processes.

[0236] In this embodiment, if the packaging process is not changed, the thickness of the packaging film layer located on the side of the closed cavity 501 near the middle of the isolation opening 201 can be effectively increased to improve the packaging effect; or, the packaging process can be improved by shortening the packaging process time and / or reducing the amount of packaging material, thereby reducing the manufacturing cost of the display panel 10 without reducing the packaging performance.

[0237] For details, please refer to Figure 6 and Figure 7 The encapsulation layer 5 defines a closed chamber 501 on the side of the isolation structure 2 facing the isolation opening 201.

[0238] The encapsulation layer 5 includes a first encapsulation sub-part 51 and a second encapsulation sub-part 52 connected together. The first encapsulation sub-part 51 covers at least a portion of the sidewall of the isolation structure 2 facing the isolation opening 201, and the second encapsulation sub-part 52 covers the side of the light-emitting device 3 facing away from the substrate 1. At least a portion of the outer surfaces of the first encapsulation sub-part 51 and the second encapsulation sub-part 52 are in contact with each other and maintain close contact, and the connection between the two defines a closed cavity 501.

[0239] In other words, the closed chamber 501 is formed at the connection between the first encapsulation sub-part 51 and the second encapsulation sub-part 52.

[0240] In addition to the closed chamber 501, a closed area 502 is also formed at the connection between the first package sub-part 51 and the second package sub-part 52. Along the direction parallel to the plane where the substrate 1 is located, the closed area 502 is located on the side of the closed chamber 501 near the middle of the isolation opening 201. That is, the closed area 502 is located on the side of the closed chamber 501 near the center of the isolation opening 201.

[0241] In some embodiments, the closed chamber 501 may be an annular chamber, in which case the closed area 502 is an annular structure located on the side (i.e., the inner side) of the closed chamber 501 near the middle of the isolation opening 201.

[0242] Due to the thickness of the light-emitting device 3, the thicker the light-emitting device 3, the smaller the distance between the side of the light-emitting device 3 facing away from the substrate 1 and the side of the second isolation portion 22 facing the substrate 1. Correspondingly, the earlier the first packaging sub-part 51 and the second packaging sub-part 52 come into contact during the packaging process, the smaller the space of the formed closed cavity 501; similarly, the wider the formed closed area 502.

[0243] The space of the closed chamber 501 refers to a measure of the size of an object or spatial range in three-dimensional space (length, width, and height). In this embodiment, it is used to describe the size of the space occupied by the closed chamber 501 or the range of the spatial area occupied by the closed chamber 501. The width of the closed area 502 refers to the dimension of the closed area 502 in the direction from the center of the isolation opening 201 to the periphery.

[0244] The isolation opening 201 used to encapsulate the first light-emitting device 301 is defined as the first opening, the isolation opening 201 used to encapsulate the second light-emitting device 302 is defined as the second opening, and the isolation opening 201 used to encapsulate the third light-emitting device 303 is defined as the third opening. When the microcavity 3001 has the same order, the thickness of the first light-emitting device 301 is less than the thickness of the second light-emitting device 302, and the thickness of the second light-emitting device 302 is less than the thickness of the third light-emitting device 303. In this case, the size of the closed cavity 501 formed in the first opening is greater than the size of the closed cavity 501 formed in the second opening, and the size of the closed cavity 501 formed in the second opening is greater than the size of the closed cavity 501 formed in the third opening; the size of the closed region 502 formed in the first opening is less than the size of the closed region 502 formed in the second opening, and the size of the closed region 502 formed in the second opening is less than the size of the closed region 502 formed in the third opening.

[0245] When the order of the microcavity 3001 is the same, the width of the closed region 502 within different isolation openings 201 is positively correlated with the thickness of the microcavity 3001 of the light-emitting device 3.

[0246] It should be noted that, due to manufacturing errors, the relationship between the width of the closed region 502 and the thickness of the light-emitting device 3 may not strictly follow a direct proportional relationship or other mathematical relationships. The above description only represents the dimensional variation trend of the closed region 502.

[0247] To ensure that the encapsulation layer 5 is a continuous film structure and has a better encapsulation effect, in some embodiments, the encapsulation layer 5 further includes a third encapsulation sub-part 53, which is located on the side of the isolation structure 2 facing away from the substrate 1 and is connected to the first encapsulation sub-part 51.

[0248] It should be noted that the end of the third package sub-part 53 connected to the first package sub-part 51 is located on the side of the closed region 502 facing away from the substrate 1.

[0249] That is, the connection between the third encapsulation sub-part 53 and the first encapsulation sub-part 51 is adjacent to the end of the first encapsulation sub-part 51 and the second encapsulation sub-part 52 that forms a closed cavity 501.

[0250] Please see Figure 6 Along the direction perpendicular to the plane where the substrate 1 is located, there is a gap between the third package sub-part 53 and the isolation structure 2.

[0251] When manufacturing the display panel 10, the light-emitting devices 3 and the encapsulation layer 5 can be fabricated sequentially in the order of the first light-emitting device 301, the second light-emitting device 302, and the third light-emitting device 303. If the encapsulation layer 5 fails, the etching process in subsequent processes will etch the exposed portions of the already fabricated light-emitting devices 3 and the isolation structure 2, resulting in dark spot defects and affecting the yield and reliability of the display panel 10. Due to the structural changes in the light-emitting devices 3, the encapsulation performance of the encapsulation layer 5 is improved, thus effectively reducing the possibility of etching damage to the encapsulation layer 5 and the light-emitting devices 3 fabricated in the previous process, leading to failure, during subsequent processes.

[0252] In this embodiment or other similar embodiments, the encapsulation layer 5 is further provided with at least one of the following film layer structures on the side facing away from the substrate: a planarization layer, an organic encapsulation film layer, an inorganic encapsulation film layer, a touch layer, an organic adhesive layer, and a cover plate.

[0253] Taking the planarization layer as an example, the material of the planarization layer may include at least one of organic materials and inorganic materials. For example, organic polymers (such as polyimide, acrylic resin, etc.) or inorganic materials (such as silicon oxide, silicon nitride, etc.).

[0254] The planarization layer made of organic materials can be prepared using techniques such as IJP (Ink-Jet Printing). Part of the planarization layer can flow into the aforementioned isolation opening 201, and by filling the isolation opening 201, it improves the flatness of the display panel 10, while also providing some protection to the related film layers located below it.

[0255] In some embodiments, in order to further improve the display effect of the display panel 10, a polarization layer may be added as needed. The polarization layer is located on the side of the light-emitting device 3 facing away from the substrate 1.

[0256] Specifically, the polarization layer can be positioned on the side of the planarization layer facing away from the substrate 1.

[0257] For example, the polarization layer includes a plurality of polarizing sub-parts, and the orthographic projection of the polarizing sub-parts on the substrate 1 along a direction perpendicular to the substrate 1 at least partially overlaps with the orthographic projection of the light-emitting device 3 on the substrate 1.

[0258] The structure of the polarization layer has been disclosed in related technologies. In this embodiment, the polarization layer can be used to realize 3D display, and also helps to reduce the reflection of ambient light on the surface of the display panel 10, so as to improve the contrast and readability of the display panel 10 under different lighting conditions; in addition, the polarization layer can also be used to polarize the light emitted by the display panel 10, thereby improving the display effect of the display panel 10 to a certain extent and giving the display panel 10 a certain privacy protection function.

[0259] In a second aspect, this application also provides a display panel 10, which includes a substrate 1, an isolation structure 2, and a display functional layer. The isolation structure 2 is located on one side of the substrate 1 and encloses a plurality of isolation openings 201. The display functional layer includes a plurality of spaced-apart light-emitting devices 3, at least a portion of which is disposed within the isolation openings 201. Each light-emitting device 3 includes a first electrode 31, a light-emitting functional layer 32, and a second electrode 33 stacked together. The first electrode 31 is located between the substrate 1 and the light-emitting functional layer 32, and the second electrode 33 is located on the side of the light-emitting functional layer 32 facing away from the substrate 1. The first electrode 31 has a reflective surface 311, and the distance between the side of the light-emitting device 3 facing away from the substrate 1 and the reflective surface 311 is greater than or equal to the distance between them.

[0260] By setting the distance between the reflective surface 311 in the light-emitting device 3 and the side of the light-emitting device 3 facing away from the substrate 1 to be greater than or equal to... This allows the light-emitting device 3 to meet the design requirements of a third-order microcavity 3001. When the light-emitting device 3 has a third-order microcavity 3001, the light-emitting effect of the light-emitting device 3 can be significantly optimized, resulting in a better display effect for the display panel 10, and also helping to improve the lifespan of the display panel 10. Of course, as the thickness of the light-emitting device 3 further increases, the light-emitting device 3 can also form a microcavity 3001 structure with an even higher order.

[0261] Other structures of the display panel 10 in this embodiment can be found in the preceding text and will not be repeated here.

[0262] In a third aspect, this application also provides a display device 100, please refer to... Figure 8 The display device 100 includes the display panel 10 described in any of the preceding claims.

[0263] For details regarding the specific structure of the display panel 10, please refer to the specific description in the foregoing embodiments, which will not be repeated here.

[0264] The display device 100 provided in this embodiment can be a mobile phone, laptop, tablet computer, smartwatch, smart bracelet, smart wearable glasses, navigator, monitor, personal digital assistant (PDA), professional monitor, high-end TV, VR (Virtual Reality) device, AR (Augmented Reality) device, in-vehicle display device, or other products or components with display functions.

[0265] Since the display device 100 has the aforementioned display panel 10, the display device 100 has at least the beneficial effects of any one or more of the aforementioned display panels 10. The specific effects are as described above and will not be repeated here.

[0266] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: Substrate; An isolation structure is located on one side of the substrate, and the isolation structure encloses and forms a plurality of isolation openings; The display functional layer includes a plurality of spaced light-emitting devices, at least a portion of which is disposed within the isolation opening. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked together. The first electrode is located between the substrate and the light-emitting functional layer, and the second electrode is located on the side of the light-emitting functional layer facing away from the substrate. The first electrode has a reflective surface, and at least a portion of the light-emitting device located on the side of the reflective surface facing away from the substrate forms a microcavity, wherein the order of the microcavity is greater than or equal to three.

2. The display panel according to claim 1, characterized in that, The light-emitting device has a first light-emitting device and a second light-emitting device with different light-emitting colors. The first light-emitting device is used to emit light of a first color, and the second light-emitting device is used to emit light of a second color. The resonant wavelength of the first color light is smaller than the resonant wavelength of the second color light. Wherein, along the direction perpendicular to the plane where the substrate is located, the thickness of the microcavity of the first light-emitting device is a first thickness, the thickness of the microcavity of the second light-emitting device is a second thickness, and the first thickness is less than the second thickness; Preferably, the first color light is blue, and the second color light is green; Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Alternatively, the first color light is blue, and the second color light is red; Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Alternatively, the first color light is green, and the second color light is red; Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to 3. The display panel according to claim 2, characterized in that, The light-emitting device also has a third light-emitting device, which is used to emit a third color light, wherein the resonant wavelength of the second color light is smaller than the resonant wavelength of the third color light; Wherein, along the direction perpendicular to the plane where the substrate is located, the thickness of the microcavity of the third light-emitting device is the third thickness, and the second thickness is less than the third thickness; Preferably, the first color light is blue, the second color light is green, and the third color light is red; Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to The third thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to The third thickness is greater than or equal to Preferably, the first thickness is greater than or equal to The second thickness is greater than or equal to The third thickness is greater than or equal to 4. The display panel according to claim 3, characterized in that, The microcavity of the light-emitting device is of order three; Preferably, the microcavity satisfies the following formula: Where n is the effective refractive index, and d is the thickness of the microcavity along the direction perpendicular to the plane of the substrate. λ is the phase shift dimension, m is the order of the microcavity, and λ is the target resonant wavelength. Preferably, the value of n ranges from 1.5 to 2.0; Preferably, the value of n is in the range of 1.7 to 1.

8.

5. The display panel according to claim 4, characterized in that, When the light-emitting device emits blue light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information]. And / or, when the light-emitting device emits green light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information]. And / or, when the light-emitting device emits red light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information].

6. The display panel according to claim 3, characterized in that, The microcavity of the light-emitting device is of order four; Preferably, when the light-emitting device emits blue light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information]. And / or, when the light-emitting device emits green light, the thickness range of the microcavity of the light-emitting device is [missing information]. And / or, when the light-emitting device emits red light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information].

7. The display panel according to claim 3, characterized in that, The microcavity of the light-emitting device is of order five; Preferably, when the light-emitting device emits blue light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information]. And / or, when the light-emitting device emits green light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information]. And / or, when the light-emitting device emits red light, the thickness range of the microcavity of the light-emitting device is [missing information]. Preferably, the thickness range of the microcavity of the light-emitting device is [missing information].

8. The display panel according to claim 1, characterized in that, The light-emitting functional layer includes at least a hole transport layer, a light-emitting layer, and an electron transport layer stacked together. Along a direction perpendicular to the plane of the substrate, the thickness of at least one of the hole transport layer and the electron transport layer is greater than the thickness of the light-emitting layer. Preferably, along a direction perpendicular to the substrate, the distance between the side of the second electrode facing away from the substrate and the reflective surface is a first distance, and the distance between the side of the light-emitting layer facing the substrate and the reflective surface is a second distance, wherein the second distance is greater than or equal to 1 / 5 of the first distance; Preferably, the second distance is less than or equal to 3 / 10 of the first distance; Preferably, the second distance is 1 / 4 of the first distance.

9. The display panel according to claim 8, characterized in that, The distance between the side of the second electrode facing away from the substrate and the side of the light-emitting layer facing away from the substrate is a third distance, and the third distance is less than or equal to 4 / 5 of the first distance; Preferably, the third distance is less than or equal to 3 / 4 of the first distance.

10. The display panel according to claim 8, characterized in that, The second distance is greater than or equal to 3 / 5 of the first distance; Preferably, the second distance is less than or equal to 9 / 10 of the first distance; Preferably, the second distance is 3 / 4 of the first distance; Preferably, the distance between the side of the second electrode facing away from the substrate and the side of the light-emitting layer facing away from the substrate is a third distance, and the third distance is less than or equal to 2 / 5 of the first distance; Preferably, the third distance is less than or equal to 1 / 4 of the first distance.

11. The display panel according to claim 8, characterized in that, The hole transport layer is located on the side of the light-emitting layer facing the substrate, and the electron transport layer is located on the side of the light-emitting layer facing away from the substrate; Preferably, the electron transport layer overlaps with a portion of the sidewall of the isolation structure facing the isolation opening; or, along a direction perpendicular to the plane of the substrate, the orthographic projection of one end of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the electron transport layer on the substrate. Preferably, along a direction perpendicular to the plane of the substrate, the orthographic projection of one end of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the hole transport layer on the substrate; Preferably, along a direction perpendicular to the plane of the substrate, the orthographic projection of one end of the isolation structure near the substrate on the substrate is spaced apart from the orthographic projection of the light-emitting layer on the substrate; Preferably, along a direction perpendicular to the plane of the substrate, the orthographic projection of the end of the isolation structure closest to the substrate on the substrate is spaced apart from the orthographic projection of the light-emitting functional layer on the substrate.

12. The display panel according to claim 11, characterized in that, The light-emitting functional layer further includes a functional material layer, which is located between the hole transport layer and the light-emitting layer; Preferably, the light-emitting functional layer further includes a hole injection layer, which is located on the side of the hole transport layer facing the substrate; Preferably, the light-emitting functional layer further includes a hole-blocking layer, which is located between the light-emitting layer and the electron transport layer; Preferably, the light-emitting functional layer further includes an electron injection layer, which is located on the side of the electron transport layer facing away from the substrate.

13. The display panel according to any one of claims 1-12, characterized in that, The display panel further includes a pixel definition layer, which is located between the substrate and the isolation structure. The pixel definition layer has pixel openings, which are correspondingly arranged and connected to the isolation openings. The first electrode is located between the substrate and the pixel definition layer, and a portion of its surface is exposed relative to the pixel opening. The light-emitting functional layer covers the pixel opening and is in contact with the first electrode. The second electrode covers at least a portion of the surface of the light-emitting functional layer on the side facing away from the substrate and overlaps with the side of the isolation structure facing the isolation opening.

14. The display panel according to claim 13, characterized in that, The display panel further includes an encapsulation layer located on the side of the isolation structure and the display functional layer facing away from the substrate, the encapsulation layer defining a closed chamber on the side of the isolation structure facing the isolation opening.

15. The display panel according to claim 14, characterized in that, The encapsulation layer includes a first encapsulation sub-part and a second encapsulation sub-part connected to each other. The first encapsulation sub-part covers at least a portion of the sidewall of the isolation structure facing the isolation opening, and the second encapsulation sub-part covers the side of the light-emitting device facing away from the substrate. Wherein, at least a portion of the connection between the first encapsulation sub-part and the second encapsulation sub-part defines the closed cavity; Preferably, the first encapsulation sub-part and the second encapsulation sub-part are connected to form a closed area, and the closed area is located on the side of the closed chamber near the middle of the isolation opening along a direction parallel to the plane of the substrate; Preferably, within different isolation openings, the width of the closed region is positively correlated with the thickness of the microcavity of the light-emitting device.

16. The display panel according to claim 15, characterized in that, The encapsulation layer further includes a third encapsulation sub-part connected to the first encapsulation sub-part, the third encapsulation sub-part being located on the side of the isolation structure facing away from the substrate; Preferably, there is a gap between the third encapsulation sub-part and the isolation structure along a direction perpendicular to the plane of the substrate.

17. The display panel according to any one of claims 1-12, characterized in that, The isolation structure includes a first isolation portion and a second isolation portion arranged in a stacked manner, the second isolation portion being located on the side of the first isolation portion facing away from the substrate, and the first isolation portion and the second isolation portion forming the isolation opening; Wherein, the orthographic projection of the first isolation portion on the substrate is located within the orthographic projection of the second isolation portion on the substrate; Preferably, the first isolation portion includes a first isolation sub-portion and a second isolation sub-portion, wherein the second isolation sub-portion is located on the side of the first isolation sub-portion facing away from the substrate; Wherein, the orthographic projection of the second isolation sub-part on the substrate is located within the orthographic projection of the first isolation sub-part on the substrate; Preferably, the orthographic projection of the end of the second isolation sub-part near the second isolation portion on the substrate is located within the orthographic projection of the end of the second isolation sub-part near the first isolation sub-part on the substrate; Preferably, the material of the first isolation sub-part includes molybdenum; Preferably, the material of the second isolation sub-part includes aluminum; Preferably, the material of the second isolation portion includes titanium.

18. The display panel according to claim 1, characterized in that, The display panel further includes a polarization layer, which is located on the side of the light-emitting device that faces away from the substrate; Preferably, the polarization layer includes a plurality of polarizing sub-parts, and the orthographic projection of the polarizing sub-parts on the substrate along a direction perpendicular to the substrate at least partially coincides with the orthographic projection of the light-emitting device on the substrate.

19. A display panel, characterized in that, include: Substrate; An isolation structure is located on one side of the substrate, and the isolation structure encloses and forms a plurality of isolation openings; The display functional layer includes a plurality of spaced light-emitting devices, at least a portion of which are disposed within the isolation opening. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked together. The first electrode is located between the substrate and the light-emitting functional layer, and the second electrode is located on the side of the light-emitting functional layer facing away from the substrate. The first electrode has a reflective surface, and the distance between the side of the light-emitting device facing away from the substrate and the reflective surface is greater than or equal to...

20. A display device, characterized in that, The display panel includes any one of claims 1-19.

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