Display panel, display device and preparation method of display panel

Abstract

The invention relates to the technical field of display, and particularly provides a display panel, a display device and a preparation method of the display panel, and the display panel comprises a substrate and an isolation structure; the isolation structure is located on one side of the substrate and comprises a supporting part and a crown part, the crown part is located on the side, back to the substrate, of the supporting part, the side, back to the crown part, of the supporting part is a first surface, the side, back to the supporting part, of the crown part is a second surface, and an isolation opening is formed in the isolation structure; the end, close to the isolation opening, of the crown part inclines towards the direction close to the substrate, the isolation opening comprises a first opening, a second opening and a third opening, and the distance between the orthographic projection of the end, close to the first opening, of the first surface on the substrate and the orthographic projection of the end, close to the first opening, of the second surface on the substrate is a first length; the distance between the orthographic projection of one end, close to the second opening, of the first surface on the substrate and the orthographic projection of one end, close to the second opening, of the second surface on the substrate is a second length; the distance between the orthographic projection of one end, close to the third opening, of the first surface on the substrate and the orthographic projection of one end, close to the third opening, of the second surface on the substrate is a third length, the first length is not smaller than the second length, and the second length is not smaller than the third length.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and more specifically, to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] Organic Light Emitting Diode (OLED) and flat-panel display devices based on technologies such as OLED have the advantages of high image quality, power saving, thin body and wide application range, and are widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc., becoming the mainstream in display devices.

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

[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, embodiments of the present application provide a display panel, a display device, and a method for manufacturing a display panel to improve the performance of the display panel.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: in the first aspect, a display panel is provided, comprising a substrate and an isolation structure; the isolation structure is located on one side of the substrate, the isolation structure comprises a support portion and a crown portion, the crown portion is located on the side of the support portion facing away from the substrate, the side of the support portion facing away from the crown portion has a first surface, and the side of the crown portion facing away from the support portion has a second surface, an isolation opening is opened on the isolation structure, the isolation opening is formed by enclosing the support portion and the crown portion, and one end of the crown portion close to the isolation opening is inclined toward a direction close to the substrate;

[0007] The isolation opening includes a first opening, a second opening and a third opening, wherein the distance between the orthographic projection of one end of the first surface close to the first opening on the substrate and the orthographic projection of one end of the second surface close to the first opening on the substrate is a first length; the distance between the orthographic projection of one end of the first surface close to the second opening on the substrate and the orthographic projection of one end of the second surface close to the second opening on the substrate is a second length; the distance between the orthographic projection of one end of the first surface close to the third opening on the substrate and the orthographic projection of one end of the second surface close to the third opening on the substrate is a third length; wherein the first length is not less than the second length, and the second length is not less than the third length.

[0008] In the display panel provided in the embodiment of the present application, by setting one end of the crown near the isolation opening to be inclined toward the direction close to the substrate, it can help reduce the obstruction of the crown to the space below the isolation opening, thereby helping to optimize the distribution range of the evaporated material in the subsequent evaporation process, so that the film layer prepared by evaporation has a larger distribution area in the isolation opening, so that the light-emitting effect of the display panel is better, and the display effect and performance of the display panel are optimized; by adjusting the different projection spacings of the first surface and the second surface on the substrate in different isolation openings, the influence of the previous etching process on the subsequent evaporation process can be improved, the overlap effect of the film layer prepared by evaporation and the side wall of the isolation structure and the reliability of the overlap between the post-evaporation film layer and the side wall of the isolation structure can be improved, the display dark spot problem of the display panel can be improved, and the reliability and performance of the display panel can be improved.

[0009] Optionally, the crown portion includes a first sub-portion and a second sub-portion, the second sub-portion is located on a side of the first sub-portion close to the isolation opening; an end of the first sub-portion facing away from the base is a first end surface, an end of the second sub-portion facing away from the base is a second end surface, the second end surface is inclined relative to the base, and a side of the second end surface facing away from the base is connected to the first end surface and constitutes the first surface;

[0010] In a cross-sectional direction perpendicular to the base, an angle between a plane where the first end surface is located and a plane where the second end surface is located is an inclination angle, and the inclination angle is an acute angle.

[0011] Optionally, the inclination angle corresponding to the first opening is a first inclination angle, the inclination angle corresponding to the second opening is a second inclination angle, and the inclination angle corresponding to the third opening is a third inclination angle;

[0012] Wherein, the first inclination angle is not greater than the second inclination angle, and the second inclination angle is not greater than the third inclination angle.

[0013] Optionally, the first inclination angle is not greater than 40, the second inclination angle is in the range of 20° to 70°, and the third inclination angle is in the range of 50° to 89°.

[0014] Optionally, the first inclination angle, the second inclination angle and the third inclination angle are the same, the length of the second end face corresponding to the first opening is greater than the length of the second end face corresponding to the second opening, and the length of the second end face corresponding to the second opening is greater than the length of the second end face corresponding to the third opening.

[0015] Optionally, the first sub-section and the second sub-section are an integrated structure, and the second sub-section is arranged around the first sub-section.

[0016] Optionally, the display panel further comprises a pixel definition layer, wherein the pixel definition layer is located between the substrate and the isolation structure, and a pixel opening is formed on the pixel definition layer, wherein the pixel opening is arranged opposite to and connected to the isolation opening.

[0017] Optionally, the display panel further includes:

[0018] A display function layer is located on the substrate and includes a plurality of light emitting devices located in the corresponding isolation openings, and parts of the light emitting devices cover a side of the pixel definition layer facing away from the substrate through the pixel openings;

[0019] The encapsulation layer is located on a side of the isolation structure and the light-emitting device facing away from the substrate, and at least a portion of the encapsulation layer covering the side surface of the crown is closed to a portion covering the light-emitting device.

[0020] Optionally, the light emitting device comprises a first electrode, a light emitting functional layer and a second electrode sequentially stacked on the substrate;

[0021] The light-emitting functional layer and the second electrode of each of the light-emitting devices are located in the corresponding isolation opening, the first electrode of each of the light-emitting devices is located between the pixel definition layer and the substrate, and the first electrode is exposed from the corresponding pixel opening and contacts with the light-emitting functional layer.

[0022] Optionally, the second electrode covers a surface of the light-emitting functional layer that is away from the substrate and overlaps with an end of the support portion close to the substrate.

[0023] Optionally, the light-emitting functional layer comprises a first light-emitting functional layer, a second light-emitting functional layer and a third light-emitting functional layer having different light-emitting colors;

[0024] Wherein, at least one of the first light-emitting functional layer, the second light-emitting functional layer and the third light-emitting functional layer is disposed in each of the isolation openings.

[0025] Optionally, the wavelength of the light emitted from the first light-emitting functional layer is smaller than the wavelength of the light emitted from the second light-emitting functional layer, and the wavelength of the light emitted from the second light-emitting functional layer is smaller than the wavelength of the light emitted from the third light-emitting functional layer.

[0026] Optionally, the emergent light of the first light-emitting functional layer is blue light, the emergent light of the second light-emitting functional layer is green light, and the emergent light of the third light-emitting functional layer is red light.

[0027] Optionally, the encapsulation layer includes:

[0028] A first packaging portion, located on a side of the isolation structure facing away from the substrate;

[0029] A second packaging portion, located on a side of the light-emitting device facing away from the substrate and connected to the first packaging portion;

[0030] The second packaging portion covers the light emitting device and at least a portion of the isolation structure close to an outer wall of the isolation opening.

[0031] Optionally, in a direction perpendicular to the substrate, there is a gap between adjacent first packaging portions and a surface of the crown portion facing away from the substrate.

[0032] Optionally, the encapsulation layer defines a closed cavity on a side of the isolation structure facing the isolation opening.

[0033] Optionally, the orthographic projection of the support portion on the base is located within the orthographic projection of the crown portion on the base.

[0034] Optionally, the support portion includes at least two superimposed sub-support portions, and an orthographic projection of the sub-support portion farther from the substrate on the substrate is located within a range of an orthographic projection of the sub-support portion closer to the substrate on the substrate.

[0035] Optionally, the orthographic projection of the sub-support portion closest to the base on the base is located within the range of the orthographic projection of the crown portion on the base.

[0036] Optionally, in the normal cross section of the display panel, a cross-sectional profile of a portion of the support portion located between two adjacent isolation openings is one of a rectangle, a trapezoid and an inverted trapezoid.

[0037] In a second aspect, an embodiment of the present application further provides a method for preparing a display panel, comprising:

[0038] providing a substrate;

[0039] An isolation structure is prepared on one side of the substrate, the isolation structure includes a support portion and a crown portion, the crown portion is located on the side of the support portion facing away from the substrate, the side of the support portion facing away from the crown portion has a first surface, and the side of the crown portion facing away from the support portion has a second surface, an isolation opening is opened on the isolation structure, the isolation opening is formed by enclosing the support portion and the crown portion, and one end of the crown portion close to the isolation opening is inclined toward the direction close to the substrate; the isolation opening includes a first opening, a second opening and a third opening, the distance between the orthographic projection of one end of the first surface close to the first opening on the substrate and the orthographic projection of one end of the second surface close to the first opening on the substrate is a first length; the distance between the orthographic projection of one end of the first surface close to the second opening on the substrate and the orthographic projection of one end of the second surface close to the second opening on the substrate is a second length; the distance between the orthographic projection of one end of the first surface close to the third opening on the substrate and the orthographic projection of one end of the second surface close to the third opening on the substrate is a third length;

[0040] The first length is not less than the second length, and the second length is not less than the third length.

[0041] In the method for preparing a display panel provided in an embodiment of the present application, by adjusting the inclination of one end of the crown near the isolation opening toward the direction of the substrate, and at the same time limiting the different spacings between the orthographic projections of the first surface and the second surface on the substrate in different isolation openings, the distribution area of ​​the subsequent evaporated film layer can be expanded to a certain extent, and the influence of the preceding etching process on the subsequent evaporation process can be reduced, so as to improve the poor overlap defects of the side walls of the isolation structure caused by etching retreat, thereby achieving the purpose of improving the display effect and performance of the display panel.

[0042] Optionally, after the step of preparing an isolation structure on one side of the substrate and enclosing the isolation structure to form an isolation opening, the method further includes:

[0043] A light emitting device is prepared in the isolation opening, and a packaging layer covering the isolation structure is prepared on a side of the light emitting device that is away from the substrate.

[0044] Optionally, preparing a light-emitting device in the isolation opening, and preparing an encapsulation layer covering the isolation structure on a side of the light-emitting device facing away from the substrate, comprises:

[0045] Preparing a display material layer on the isolation structure, forming an encapsulation material layer on the side of the display material layer facing away from the substrate, etching and patterning the encapsulation material layer and the display material layer to form a light-emitting device located in the first opening, and an encapsulation layer covering the first opening;

[0046] Preparing a display material layer on the isolation structure, forming an encapsulation material layer on the side of the display material layer facing away from the substrate, etching and patterning the encapsulation material layer and the display material layer to form a light-emitting device located in the second opening, and an encapsulation layer covering the second opening;

[0047] A display material layer is prepared on the isolation structure, and an encapsulation material layer is formed on the side of the display material layer facing away from the substrate. The encapsulation material layer and the display material layer are etched and patterned to form a light-emitting device located in the third opening and an encapsulation layer covering the third opening.

[0048] In a third aspect, an embodiment of the present application further provides a display device, comprising any of the display panels described above.

[0049] In the embodiment provided in the present application, the display device has the above-mentioned display panel, and thus has at least the advantages of the above-mentioned display panel. The specific effects are described above and will not be repeated here.

[0050] The beneficial effects of the display panel, display device and display panel manufacturing method provided in the present application are: compared with the related art, the display panel provided in the present application can make the light-emitting functional layer and the second electrode located in the isolation opening have a larger size by adjusting the crown morphology of the isolation structure, so as to ensure that the second electrode can achieve effective overlap with the side wall of the isolation structure facing the isolation opening, thereby reducing the display dark spot failure of the display panel caused by poor overlap of the second electrode; in addition, the above structure can also enable the display panel to form a larger light-emitting area, so as to optimize the light-emitting effect and performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0052] Figure 1 A schematic plan view of a display panel provided in an embodiment of the present application;

[0053] Figure 2 A schematic diagram of the cross-sectional structure of area A in a display panel provided in one embodiment of the present application;

[0054] Figure 3 for Figure 2 A magnified view of the structure in the middle B area;

[0055] Figure 4A schematic diagram of the cross-sectional structure of region A in a display panel provided by another embodiment of the present application;

[0056] Figure 5 for Figure 4 A magnified view of the structure of the middle C area;

[0057] Figure 6 A flow chart of a method for preparing a display panel provided in an embodiment of the present application;

[0058] Figure 7 A simplified structural diagram of a display device provided in an embodiment of the present application.

[0059] Among them, the reference numerals in the figure are:

[0060] 1. substrate; 2. isolation structure; 201. isolation opening; 201a. first opening; 201b. second opening; 201c. third opening; 202. first surface; 203. second surface; 21. support portion; 211. sub-support portion; 22. crown portion; 221. first sub-portion; 2211. first end surface; 222. second sub-portion; 2221. second end surface; 3. pixel definition layer; 301. pixel opening; 4. light-emitting device; 41. first electrode; 42. light-emitting functional layer; 42a. first light-emitting functional layer; 42b. second light-emitting functional layer; 42c. third light-emitting functional layer; 43. second electrode; 5. encapsulation layer; 51. first encapsulation portion; 52. second encapsulation portion;

[0061] 10. Display panel; 100. Display device; S. Closed chamber. DETAILED DESCRIPTION

[0062] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0063] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0064] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0066] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0069] The term "layer" used in the text may refer to a material portion including an area with a certain thickness. A layer may extend over the entire underlying structure or overlying structure, or may have a range smaller than the range of the underlying or overlying structure. In addition, a layer may be an area of ​​a homogeneous or inhomogeneous continuous structure, the thickness of which is less than the thickness of the continuous structure. For example, a layer may be located between the top surface and the bottom surface of the continuous structure or between any paired lateral planes at the top surface and the bottom surface. A layer may extend laterally, vertically and / or along a tapered surface. A substrate may be a layer, may include one or more layers therein, and / or may have one or more layers located thereon, above it and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductors and a contact layer (forming contacts, interconnects and / or vias therein) and one or more dielectric layers.

[0070] In the process of implementing the present application, the inventors discovered the following problems in the related art: some pixel units have display anomalies, which affect the display effect of the display panel 10 to a certain extent and ultimately affect its performance.

[0071] Based on this, an embodiment of the present application provides a display panel 10 to alleviate or improve the above technical problems at least to a certain extent and improve the reliability of the display panel 10 .

[0072] See also Figure 1-Figure 3 The display panel 10 provided in the embodiment of the present application includes a substrate 1 and an isolation structure 2; wherein the isolation structure 2 is located on the substrate 1 and has an isolation opening 201, and the isolation structure 2 includes a support portion 21 and a crown portion 22, and the crown portion 22 is located on the side of the support portion 21 facing away from the substrate 1. The isolation opening 201 is formed by enclosing the support portion 21 and the crown portion 22.

[0073] The contents of the isolation structure 2 mentioned below are further described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A for reference.

[0074] See also Figure 2-Figure 3 The side of the support portion 21 of the isolation structure 2 facing away from the crown portion 22 has a first surface 202, and the side of the crown portion 22 of the isolation structure 2 facing away from the support portion 21 has a second surface 203. The orthographic projection area of ​​the crown portion 22 on the substrate 1 is equivalent to the orthographic projection area of ​​the second surface 203 on the substrate 1, and the orthographic projection area of ​​the support portion 21 on the substrate 1 is equivalent to the orthographic projection area of ​​the first surface 202 on the substrate 1.

[0075] Among them, one end of the crown 22 close to the isolation opening 201 is inclined toward the direction of the base 1 relative to the area above the connecting portion, so as to reduce the orthographic projection area of ​​the crown 22 on the base 1 within a certain range. At this time, the outer contour range of the orthographic projection area of ​​the crown 22 on the base 1 is reduced to a certain extent.

[0076] The isolation openings 201 include a first opening 201 a , a second opening 201 b and a third opening 201 c . The three types of isolation openings 201 can be classified according to the order in which the light emitting device 4 is prepared.

[0077] Specifically, the distance between the orthographic projection of one end of the first surface 202 close to the first opening 201a on the substrate 1 and the orthographic projection of one end of the second surface 203 close to the first opening 201a on the substrate 1 is the first length; the distance between the orthographic projection of one end of the first surface 202 close to the second opening 201b on the substrate 1 and the orthographic projection of one end of the second surface 203 close to the second opening 201b on the substrate 1 is the second length; the distance between the orthographic projection of one end of the first surface 202 close to the third opening 201c on the substrate 1 and the orthographic projection of one end of the second surface 203 close to the third opening 201c on the substrate 1 is the third length. The first length is not less than the second length, and the second length L2 is not less than the third length.

[0079] Under the premise that the overall size of the crown 22 remains unchanged, the orthographic projection area of ​​the crown 22 on the base 1 is reduced (i.e. Figure 3 The range indicated by d in the figure) can reduce the shielding range of the crown 22 on the vapor-deposited film layer in the subsequent process, and make the film layer prepared by the vapor deposition process have a larger distribution area in the isolation opening 201, so as to make the light-emitting effect of the display panel 10 better and optimize the display effect and performance of the display panel 10; in addition, the above structure can also improve the overlapping effect of the film layer prepared by the subsequent vapor deposition process and the side wall of the isolation structure 2, improve the overlapping reliability of the vapor-deposited film layer and the side wall of the isolation structure 2, improve the display dark spot problem of the display panel 10, and improve the reliability and performance of the display panel 10.

[0080] In the subsequent evaporation process, the distribution area of ​​the film layer structure prepared by evaporation in the isolation opening 201 is affected by the shielding of the crown 22. Under the premise that the shielding area of ​​the crown 22 is reduced, the distribution area of ​​the evaporated film layer in the isolation opening 201 can be increased, so that the evaporated film layer prepared in the isolation opening 201 can be better overlapped on the side wall of the isolation structure 2 near the isolation opening 201.

[0081] See also Figure 2 and Figure 3 The crown portion 22 includes a first sub-portion 221 and a second sub-portion 222 , wherein the second sub-portion 222 is located on a side of the first sub-portion 221 close to the isolation opening 201 .

[0082] Specifically, when an isolation opening 201 is opened on one side of the crown 22, the second sub-portion 222 is located on the side of the first sub-portion 221 close to the isolation opening 201; when isolation openings 201 are opened on both opposite sides of the crown 22, the second sub-portion 222 is formed on both opposite sides of the first sub-portion 221; when isolation openings 201 are opened on the circumferential side of the crown 22, the second sub-portion 222 is arranged around the first sub-portion 221.

[0083] See also Figure 2 and Figure 3 The end of the first sub-portion 221 facing away from the substrate 1 is a first end surface 2211, and the end of the second sub-portion 222 facing away from the substrate 1 is a second end surface 2221. The second end surface 2221 is inclined relative to the substrate 1 and the side of the second end surface 2221 facing away from the substrate 1 is connected to the first end surface 2211 and constitutes the first surface 202 mentioned above.

[0084] In the cross-sectional direction perpendicular to the substrate 1, that is, the cross-sectional direction of the display panel 10, the second sub-portion 222 is inclined relative to the first sub-portion 221 toward the side close to the substrate 1. Under the premise that the size of the second sub-portion 222 remains unchanged, the second sub-portion 222 is inclined relative to the first sub-portion 221 toward the side close to the substrate 1, so that the positive projection range of the second sub-portion 222 on the substrate 1 can be reduced, and the projection area of ​​the crown portion 22 can be reduced, so as to improve the distribution area and distribution range of the film layer prepared by the subsequent evaporation process.

[0085] See also Figure 2 and Figure 3 , the orthographic projection of the support portion 21 on the base 1 is located within the orthographic projection of the crown portion 22 on the base 1. At this time, the end of the crown portion 22 near the isolation opening 201 can be tilted downward and does not contact the support portion 21.

[0086] Specifically, the crown portion 22 includes a first sub-portion 221 and a second sub-portion 222 , and the first sub-portion 221 and the second sub-portion 222 are an integrated structure.

[0087] Specifically, in the normal cross section of the display panel 10 , the cross-sectional profile of the portion of the support portion 21 located between two adjacent isolation openings 201 is one of a rectangle, a trapezoid, and an inverted trapezoid.

[0088] At least part of the support portion 21 is a conductive structure, especially only one side of the substrate 1. In some embodiments, the support portion 21 is a single-layer structure, and in other embodiments, the support portion 21 can be a multi-layer structure.

[0089] When the support portion 21 is a multi-layer structure, the support portion 21 may include at least two stacked sub-support portions 211. The orthographic projection of the sub-support portion 211 far from the substrate 1 on the substrate 1 is located within the orthographic projection range of the sub-support portion 211 close to the substrate 1 on the substrate 1.

[0090] A certain film layer obtained by the above evaporation can overlap with the sub-support part 211 close to the substrate 1, or can overlap with two sub-support parts 211 at the same time. The film layer can be an electrode.

[0091] See also Figure 3 The support portion 21 in the figure is made of two sub-support portions 211 which are overall rectangular structures or regular trapezoidal structures, wherein the sub-support portion 211 near the base 1 is relatively thin, and the sub-support portion 211 near the crown 22 is relatively thick.

[0092] Specifically, the orthographic projection of the sub-support portion 211 closest to the base 1 on the base 1 is located within the range of the orthographic projection of the crown portion 22 on the base 1 .

[0093] In some embodiments, the side wall of the sub-support portion 211 far from the substrate 1 toward the isolation opening 201 is offset toward a direction away from the isolation opening 201 relative to the side wall of the sub-support portion 211 close to the substrate 1, thereby making the cross-sectional side wall of the isolation structure 2 present a shape similar to an eave / brimstone.

[0094] Of course, in other similar embodiments, the size and projection relationship between the sub-support portions 211 and the crown portion 22 stacked in sequence may also be adaptively adjusted according to actual processing requirements.

[0095] In some embodiments, the sub-support portion 211 and the crown portion 22 may be an integrally formed structure, or may be formed by stacking different materials.

[0096] Specifically, the material of the crown 22 includes metal titanium, which is a titanium metal layer; the material of the sub-support portion 211 attached to the crown 22 includes metal aluminum, which is an aluminum metal layer; the material of the sub-support portion 211 closest to the substrate 1 includes metal molybdenum, which is a molybdenum metal layer.

[0097] See also Figure 3 The surface of the first sub-portion 221 facing away from the base 1 is the first end surface 2211, and the surface of the second sub-portion 222 facing away from the base 1 is the second end surface 2221. The angle between the plane where the first end surface 2211 is located and the plane where the second end surface 2221 is located is the inclination angle θ, and the inclination angle θ is an acute angle.

[0098] It should be noted that the inclination angle of the crown portion 22 toward the base 1 can be adjusted according to actual processing requirements.

[0099] In some embodiments, the sizes of the second sub-portions 222 of all the crowns 22 can be set to be consistent. In this case, the inclination angles of the second sub-portions 222 of all the crowns 22 toward the base 1 can be set to be consistent, or the inclination angles of some crowns 22 toward the base 1 can be set to be different.

[0100] In some embodiments, the isolation openings 201 may be classified according to the order in which the related film layers are prepared in the related isolation openings 201 .

[0101] For details, please refer to Figure 2 The isolation opening 201 includes three different types corresponding to different patterning orders, namely, the first opening 201a, the second opening 201b and the third opening 201c. The inclination angle corresponding to the first opening 201a is the first inclination angle, the inclination angle corresponding to the second opening 201b is the second inclination angle, and the inclination angle corresponding to the third opening 201c is the third inclination angle; wherein the first inclination angle is not greater than the second inclination angle, and the second inclination angle is not greater than the third inclination angle.

[0102] In some embodiments, the opening shapes corresponding to the first opening 201a, the second opening 201b and the third opening 201c are the same. In this case, the first inclination angle, the second inclination angle and the third inclination angle are kept consistent. Accordingly, the size of the orthographic projection of the second sub-portion 222 of the crown 22 on the substrate 1 (i.e. Figure 3 The size indicated by d in the figure should remain consistent.

[0103] In other similar embodiments, when the opening shapes corresponding to the first opening 201a, the second opening 201b and the third opening 201c are different, and the angles of the first inclination angle, the second inclination angle and the third inclination angle are different, the first inclination angle is not greater than the second inclination angle, and the second inclination angle is not greater than the third inclination angle, and accordingly, the orthographic projection size of the second sub-portion 222 of the crown portion 22 on the base 1 is also different. The orthographic projection size of the second sub-portion 222 arranged corresponding to the first opening 201a on the base 1 is defined as d1, the orthographic projection size of the second sub-portion 222 arranged corresponding to the second opening 201b on the base 1 is defined as d2, and the orthographic projection size of the second sub-portion 222 arranged corresponding to the third opening 201c on the base 1 is defined as d3, wherein d1 is not greater than d2, and d2 is not greater than d3.

[0104] Specifically, the first opening 201a, the second opening 201b and the third opening 201c are evenly distributed in different areas of the isolation structure 2 according to a certain rule. Among them, any one or more of the first opening 201a, the second opening 201b and the third opening 201c may be distributed around the first opening 201a. In other words, the types of two adjacent isolation openings 201 may be the same or different. Therefore, the inclination amplitude (including the inclination angle and the size of the inclination portion, etc.) of the crown 22 of the isolation structure 2 located between two adjacent isolation openings 201 toward the side of the substrate 1 may be the same, or there may be certain differences.

[0105] Therefore, the above-mentioned d1 can be understood as the orthographic projection size of the second sub-portion 222 on the side of the first opening 201a corresponding to the isolation structure 2 that defines the first opening 201a on the substrate 1; d2 can be understood as the orthographic projection size of the second sub-portion 222 on the side of the second opening 201b corresponding to the isolation structure 2 that defines the second opening 201b on the substrate 1; d3 can be understood as the orthographic projection size of the second sub-portion 222 on the side of the third opening 201c corresponding to the isolation structure 2 that defines the third opening 201c on the substrate 1.

[0106] See also Figure 2The three isolation openings 201 arranged in sequence in the figure are respectively the first opening 201a, the second opening 201b and the third opening 201c. The angle value of the first inclination angle corresponding to the first opening 201a in the figure is not greater than the angle value of the second inclination angle corresponding to the second opening 201b, and the angle value of the second inclination angle is not greater than the angle value of the third inclination angle corresponding to the third opening 201c.

[0107] Specifically, the first inclination angle ≤ the second inclination angle ≤ the third inclination angle.

[0108] In some embodiments, the first inclination angle can be set to be no greater than 40°, and its specific numerical range can be adjusted as needed. For example, the angle value of the first inclination angle can be any value of 5°, 10°, 15°, 20°, 25°, 30°, etc.

[0109] Similarly, the second inclination angle can be set in the range of 20° to 70°, and its specific value range can be adjusted according to actual needs. For example, the angle can be any value among 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc.

[0110] Similarly, the value range of the third tilt angle is 50° to 89°, and its specific value range can be adjusted according to actual needs. For example, the angle can be any value of 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 89°, etc. It should be noted that the angle of the first tilt angle should not be greater than the angle of the second tilt angle, and the angle of the second tilt angle should not be greater than the angle of the third tilt angle.

[0111] In other similar embodiments, the sizes of the second sub-portions 222 of some crowns 22 may be inconsistent with the second sub-portions 222 of other crowns 22. In this case, the inclination angles of the second sub-portions 222 of different crowns 22 toward the substrate 1 may be flexibly adjusted as needed to ensure that the distribution range of the prepared evaporated film layer meets the design requirements.

[0112] Specifically, in some embodiments, the first inclination angle, the second inclination angle and the third inclination angle can be set to be the same. In this case, the length of the second end face 2221 corresponding to the first opening 201a is adjusted to be greater than the length of the second end face 2221 corresponding to the second opening 201b, and the length of the second end face 2221 corresponding to the second opening 201b is adjusted to be greater than the length of the second end face 2221 corresponding to the third opening 201c, so that the first length is greater than the second length, and the second length is greater than the third length.

[0113] See also Figure 2The display panel 10 provided in the embodiment of the present application further includes a pixel definition layer 3 , the pixel definition layer 3 is located on one side of the substrate 1 , and the isolation structure 2 partially covers the pixel definition layer 3 .

[0114] The pixel definition layer 3 is located between the substrate 1 and the isolation structure 2 , and a pixel opening 301 is formed thereon. The pixel opening 301 is arranged opposite to and connected to the isolation opening 201 .

[0115] The pixel definition layer 3 is an inorganic layer that can be used to define the pixel range to ensure that each pixel is independent of each other. It can also block the water vapor in the substrate 1 to prevent external factors such as water and oxygen from corroding the related film layer located on the side of the pixel definition part facing away from the substrate 1.

[0116] The orthographic projection area of ​​the pixel opening 301 on the substrate 1 is spaced apart from the orthographic projection area of ​​the crown portion 22 on the substrate 1 .

[0117] See also Figure 4 and Figure 5 The display panel 10 provided in the embodiment of the present application further includes a display function layer and an encapsulation layer 5 .

[0118] Specifically, the display function layer is located on the substrate 1 and includes a plurality of light-emitting devices 4 located in corresponding isolation openings 201, the encapsulation layer 5 is located on the side of the isolation structure 2 and the light-emitting device 4 facing away from the substrate 1, and at least part of the area covered by the encapsulation layer 5 on the side of the crown 22 is connected to the area covering the light-emitting device 4 and remains closed.

[0119] In some embodiments, the encapsulation layer 5 can be prepared by chemical vapor deposition (CVD) technology, which can deposit a relatively uniform and dense thin film on the surface of the substrate (i.e., the base 1 having the above-mentioned isolation structure 2 and the light-emitting device 4) through a chemical reaction to achieve encapsulation and protection of the display panel 10 device.

[0120] The encapsulation layer 5 may include at least one of an organic material and an inorganic material.

[0121] The encapsulation layer 5 is used to cover the side of the isolation structure 2 facing away from the substrate 1, and to cover the side of the light emitting device 4 facing away from the substrate 1. Each light emitting device 4 is arranged corresponding to the isolation opening 201, and the isolation opening 201 can be used to limit the corresponding light emitting device 4.

[0122] Specifically, the light emitting device 4 is a multi-layer structure, part of its film layer can cover the side of the pixel definition layer 3 facing away from the substrate 1 through the pixel opening 301 , and part of the film layer is located between the pixel opening 301 and the substrate 1 .

[0123] See also Figure 5The light-emitting device 4 includes a first electrode 41, a light-emitting functional layer 42, and a second electrode 43 which are sequentially stacked on the substrate 1; the light-emitting functional layer 42 and the second electrode 43 of each light-emitting device 4 are located in the corresponding isolation opening 201, the second electrode 43 is located on the side of the light-emitting functional layer 42 facing away from the substrate 1 and covers the light-emitting functional layer 42, the first electrode 41 of each light-emitting device 4 is located on the substrate 1 and on the side of the pixel definition layer 3 facing the substrate 1, and the first electrode 41 is exposed from the corresponding pixel opening 301 and contacts the light-emitting functional layer 42.

[0124] It should be noted that the orthographic projection of the above-mentioned light-emitting functional layer 42 on the substrate 1 is located within the orthographic projection range of the second electrode 43 on the substrate 1. At this time, the second electrode 43 can overlap with the end of the support portion 21 close to the substrate 1. At the same time, the orthographic projection of the light-emitting functional layer 42 on the substrate 1 is spaced apart from the orthographic projection of the support portion 21 on the substrate 1.

[0125] In some embodiments, the first electrode 41 is one of an anode and a cathode, and the second electrode 43 is the other. The second electrode 43 located in the isolation opening 201 needs to be connected to the conductive isolation structure 2 .

[0126] Specifically, the sub-support portion 211 on the side of the isolation structure 2 close to the substrate 1 is set as a conductive structure, and the second electrode 43 overlaps the side wall of the sub-support portion 211 facing the isolation opening 201. Alternatively, multiple sub-support portions 211 arranged in a stacked manner can also be set as conductive structures, in which case the second electrode 43 can overlap the side walls of the multiple sub-support portions 211 pointing to the isolation opening 201.

[0127] The orthographic projection of the second electrode 43 on the substrate 1 partially overlaps with the orthographic projection of the support portion 21 in the isolation structure 2 on the substrate 1 .

[0128] The light-emitting functional layer 42 can be made of organic small molecule light-emitting materials, complex light-emitting materials, and high molecular polymers. Different light-emitting functional layers 42 can be used to emit light of different colors. Generally speaking, the light-emitting functional layer 42 includes three types and is used to emit red, green, and blue light respectively under power-on conditions.

[0129] Specifically, the light-emitting functional layer 42 comprises a first light-emitting functional layer 42a, a second light-emitting functional layer 42b and a third light-emitting functional layer 42c, which emit light of different colors. The wavelength of the light emitted by the first light-emitting functional layer 42a is smaller than the wavelength of the light emitted by the second light-emitting functional layer 42b, and the wavelength of the light emitted by the second light-emitting functional layer 42b is smaller than the wavelength of the light emitted by the third light-emitting functional layer 42c.

[0130] Specifically, the emitted light of the first light emitting functional layer 42a is blue light, the emitted light of the second light emitting functional layer 42b is green light, and the emitted light of the third light emitting functional layer 42c is red light.

[0131] Wherein, at least one of the first light-emitting functional layer 42 a , the second light-emitting functional layer 42 b and the third light-emitting functional layer 42 c is disposed in any isolation opening 201 .

[0132] See also Figure 4 and Figure 5 , only one of the first light-emitting functional layer 42a, the second light-emitting functional layer 42b and the third light-emitting functional layer 42c is provided in each of the isolation openings 201. When preparing the light-emitting devices 4 in each isolation opening 201, it is only necessary to ensure that the light emitted by the light-emitting devices 4 in the same type of isolation openings 201 has the same color when powered on.

[0133] In some embodiments, the first opening 201a is provided with a first light-emitting functional layer 42a, the second opening 201b is provided with a second light-emitting functional layer 42b, and the third opening 201c is provided with a third light-emitting functional layer 42c. Of course, the corresponding relationship between each isolation opening 201 and each light-emitting functional layer 42 can be adaptively adjusted according to actual processing needs, and this embodiment only provides one example.

[0134] When preparing the display panel 10, the light-emitting device 4 and the encapsulation layer 5 can be prepared in the corresponding first opening 201a, second opening 201b and third opening 201c in the order of the first light-emitting functional layer 42a, the second light-emitting functional layer 42b and the third light-emitting functional layer 42c. During the preparation process, the preparation process of the front light-emitting device 4 will etch the side wall of the isolation structure 2 facing the isolation opening 201 without the corresponding light-emitting device 4, causing the relevant side wall to recede.

[0135] Specifically, in the process of preparing the light-emitting device 4 in the first opening 201a, the relevant film layers evaporated into the second opening 201b and the third opening 201c need to be removed by etching, and this step will further etch the sidewalls of the second opening 201b and the second opening 201b, so that part of the sidewalls in the isolation structure 2 retreat toward the side away from the isolation opening 201, especially the sidewalls of the sub-support portion 211 connected to the crown portion 22. Similarly, in the process of preparing the light-emitting device 4 in the second opening 201b, the relevant film layers evaporated into the first opening 201a and the third opening 201c need to be removed by etching, and this process will further etch the isolation at the third opening 201c, so that the sidewalls of the isolation structure 2 opposite to the third opening 201c further retreat in the direction away from the third opening 201c.

[0136] Therefore, without changing the evaporation range of the second electrode 43 in the subsequent process, the above process will cause the second electrode 43 prepared by the subsequent process to have a poor overlap defect with the side wall of the isolation structure 2, which will lead to dark spot failures and reduce the reliability and performance of the display panel 10.

[0137] When the crown 22 is tilted at one end near the isolation opening 201, the blocking and separation effect of the crown 22 on the second electrode 43 prepared by vapor deposition can be reduced, so that the area of ​​the second electrode 43 prepared in the corresponding isolation opening 201 is larger, thereby making it easier to overlap with the side wall of the isolation structure 2, thereby reducing the probability of pixel dark spot failure.

[0138] Specifically, in some embodiments, in order to make the light-emitting device 4 obtained by the post-process have a larger evaporation range, the crown 22 on the second opening 201b and / or the third opening 201c corresponding to the post-process may be set to have a larger inclination angle.

[0139] The larger the inclination angle is, the larger the vapor deposition range of the second electrode 43 opposite to the opening is.

[0140] In this embodiment, the third inclination angle may be set to be greater than the second inclination angle, and the second inclination angle may be set to be greater than the first inclination angle, so that the evaporation range of the subsequent process is greater than the evaporation range of the preceding process.

[0141] A larger evaporation range in the post-process can improve the distribution area of ​​the second electrode 43 prepared by evaporation, and can reduce the difficulty of overlapping the second electrode 43 with the side wall of the isolation structure 2, thereby improving the dark spot problem of the display panel 10 and improving the reliability and performance of the display panel 10.

[0142] After the light emitting device 4 is prepared, the encapsulation layer 5 covers the light emitting device 4 and the corresponding isolation opening 201 to achieve encapsulation and protection of the light emitting device 4 and the isolation opening 201 .

[0143] In some embodiments, the encapsulation layer 5 includes a first encapsulation portion 51 and a second encapsulation portion 52 . The first encapsulation portion 51 is located on a side of the isolation structure 2 facing away from the substrate 1 and forms a continuous film layer with the second encapsulation portion 52 .

[0144] The second packaging portion 52 is located on a side of the light emitting device 4 facing away from the substrate 1 , and extends along the side wall of the isolation structure 2 toward the isolation opening 201 until it is connected to the first packaging portion 51 .

[0145] Specifically, in a direction perpendicular to the substrate 1 , there is a gap between adjacent first packaging portions 51 and a surface of the crown portion 22 facing away from the substrate 1 .

[0146] See also Figure 5There is a gap between the first packaging part 51 and the first end face 2211, and there is a gap between the first packaging part 51 and the second end face 2221; the second packaging part 52 covers the side of the light-emitting device 4 facing away from the substrate 1, and covers at least part of the outer wall of the isolation structure 2 close to the isolation opening 201.

[0147] Specifically, the second encapsulation layer 5 located in the isolation opening 201 defines a closed chamber S.

[0148] See also Figure 4 and Figure 5 During the preparation of the encapsulation layer 5, the film thickness of the encapsulation layer 5 gradually increases. Influenced by the shape of the isolation opening 201, when the second encapsulation layer 5 that covers the side of the crown 22 and the part that covers the side of the light-emitting device 4 facing away from the substrate 1 gradually grows and thickens, the partial space between the lower part of the second sub-portion 222 and the upper part of the second electrode 43 can be wrapped by the gradually thickening second encapsulation layer 5, and a closed chamber S that is closed from the external environment is defined and formed.

[0149] See also Figure 5 The closed chamber S is formed by the folded and connected second packaging parts 52. The folded and contacted part of the second packaging parts 52 is defined as a closed area, which is indicated by a dotted line in the figure.

[0150] Under the premise of keeping the deposition time consistent, the earlier the second packaging part 52 is in contact during the deposition preparation process, the longer the width of the closed area in the second packaging part 52 finally prepared will be.

[0151] The timing of the second packaging part 52 contacting each other during the deposition process is limited by the inclination angle of the second sub-part 222. The larger the inclination angle of the second sub-part 222, the earlier the contact timing, and the correspondingly longer the width of the closed area formed on the second packaging part 52.

[0152] The width of the closed area in the first opening 201a is defined as L1, the width of the closed area in the second opening 201b is defined as L2, and the width of the closed area in the third opening 201c is defined as L3.

[0153] The size relationship among the first opening 201a, the second opening 201b and the third opening 201c is as mentioned above and will not be described again here.

[0154] When the opening shapes corresponding to the first opening 201a, the second opening 201b and the third opening 201c are the same, and under the premise of the same preparation process, the sizes of L1, L2 and L3 formed in the different isolation openings 201 are basically the same (due to the influence of processing technology and errors, there is a possibility of incomplete consistency).

[0155] When the size relationship between the three different inclination angles corresponding to the first opening 201a, the second opening 201b and the third opening 201c satisfies the following condition: the first inclination angle ≤ the second inclination angle ≤ the third inclination angle, then L3 ≥ L2 ≥ L1. In other words, the larger the inclination angle of the first sub-section 221, the larger the corresponding closed area width.

[0156] It should be noted that, due to the influence of processing errors, the relationship between the closed area width and the inclination angle of the first sub-section 221 may not strictly follow a proportional relationship or other mathematical relationships. The above expression only represents the variation trend of the closed area width.

[0157] Similarly, the size of the closed chamber S formed in the second packaging part 52 is also related to the inclination angle of the second sub-part 222. On the premise that the size of the second sub-part 222 remains the same, the larger the inclination angle, the earlier the second packaging part 52 is folded, and the smaller the space of the closed chamber S is.

[0158] It should be noted that due to the influence of processing errors, the relationship between the spatial size of the closed chamber SS and the inclination angle of the second sub-section 222 may not strictly follow a proportional relationship or other mathematical relationships. The above description only represents the size change trend of the closed chamber SS.

[0159] In this embodiment or other similar embodiments, the side of the encapsulation layer 5 facing away from the substrate 1 is further provided with at least one of a planarization layer, an organic encapsulation film layer, an inorganic encapsulation film layer, a touch layer, an organic adhesive layer, and a cover plate.

[0160] Taking the planarization layer as an example, the material of the planarization layer may include at least one of an organic material and an inorganic material, for example, an organic polymer (such as polyimide, acrylic resin, etc.) or an inorganic material (such as silicon oxide, silicon nitride, etc.).

[0161] The planarization layer made of organic material can be prepared by IJP (Ink-Jet Printing) and other technologies. Part of the planarization layer can flow into the isolation opening 201 and improve the flatness of the display panel 10 by filling the isolation opening 201, while also providing certain protection for the related film layers located thereunder; the other part of the planarization layer can also cover the first encapsulation part 51 and fill the gap formed between the first encapsulation part 51 and the isolation structure 2. The surface of the planarization layer finally prepared on the side facing away from the substrate 1 is a flat surface.

[0162] It can be understood that the display panel 10 provided in the embodiment of the present application can adjust the shape of the crown 22 of the isolation structure 2 so that the light-emitting functional layer 42 and the second electrode 43 located in the isolation opening 201 have a larger area, so as to ensure that the second electrode 43 can be effectively overlapped with the side wall of the isolation structure 2 facing the isolation opening 201, thereby reducing the display dark spot failure of the display panel 10 caused by poor overlap of the second electrode 43; in addition, the above structure can also enable the display panel 10 to form a larger light-emitting area, so as to optimize the light-emitting effect and performance of the display panel 10.

[0163] In a second aspect, the embodiment of the present application further provides a method for preparing a display panel 10, comprising:

[0164] Providing a substrate 1;

[0165] An isolation structure 2 is prepared on one side of a substrate 1. The isolation structure 2 includes a stacked support portion 21 and a crown portion 22. The crown portion 22 is located on the side of the support portion 21 facing away from the substrate 1. The side of the support portion 21 facing away from the crown portion 22 has a first surface 202, and the side of the crown portion 22 facing away from the support portion 21 has a second surface 203. An isolation opening 201 is opened on the isolation structure 2. The isolation opening 201 is formed by enclosing the support portion 21 and the crown portion 22. One end of the crown portion 22 close to the isolation opening 201 is inclined toward the direction close to the substrate 1. The isolation opening 201 includes a first opening 201a, a second opening 201b and a third opening 201c. 1c, the distance between the orthographic projection of one end of the first surface 202 close to the first opening 201a on the substrate 1 and the orthographic projection of one end of the second surface 203 close to the first opening 201a on the substrate 1 is the first length; the distance between the orthographic projection of one end of the first surface 202 close to the second opening 201b on the substrate 1 and the orthographic projection of one end of the second surface 203 close to the second opening 201b on the substrate 1 is the second length; the distance between the orthographic projection of one end of the first surface 202 close to the third opening 201c on the substrate 1 and the orthographic projection of one end of the second surface 203 close to the third opening 201c on the substrate 1 is the third length;

[0166] The first length is not less than the second length, and the second length is not less than the third length.

[0167] In the preparation method of the display panel 10 provided in the embodiment of the present application, by adjusting the end of the crown 22 near the isolation opening 201 to tilt toward the direction of the substrate 1, and at the same time limiting the different spacings between the orthographic projections of the first surface and the second surface on the substrate in different isolation openings, the distribution area of ​​the subsequent evaporated film layer can be expanded to a certain extent, and the influence of the previous etching process on the post-evaporation process can be reduced, so as to improve the poor overlap defects of the side wall of the isolation structure 2 caused by etching retreat, thereby achieving the purpose of improving the display effect and performance of the display panel 10.

[0168] In some embodiments, after preparing an isolation structure 2 on one side of the substrate 1 and enclosing the isolation structure 2 to form the isolation opening 201, the method further includes:

[0169] A light emitting device 4 is prepared in the isolation opening 201 , and a packaging layer 5 covering the isolation structure 2 is prepared on the side of the light emitting device 4 facing away from the substrate 1 .

[0170] At least one light emitting device 4 is disposed in any isolation opening 201 .

[0171] The light emitting device 4 is prepared in the isolation opening 201, and the encapsulation layer 5 covering the isolation structure 2 is prepared on the side of the light emitting device 4 facing away from the substrate 1, including:

[0172] A display material layer is prepared on the isolation structure 2, and an encapsulation material layer is formed on the side of the display material layer facing away from the substrate 1, and the encapsulation material layer and the display material layer are etched and patterned to form a light-emitting device 4 located in the first opening 201a, and an encapsulation layer 5 covering the first opening 201a;

[0173] A display material layer is prepared on the isolation structure 2, and an encapsulation material layer is formed on the side of the display material layer facing away from the substrate 1, and the encapsulation material layer and the display material layer are etched and patterned to form a light-emitting device 4 located in the second opening 201b, and an encapsulation layer 5 covering the second opening 201b;

[0174] A display material layer is prepared on the isolation structure 2, and an encapsulation material layer is formed on the side of the display material layer facing away from the substrate 1. The encapsulation material layer and the display material layer are etched and patterned to form a light-emitting device 4 located in the third opening 201c, and an encapsulation layer 5 covering the third opening 201c.

[0175] Specifically, when preparing the light emitting device 4 located in the first opening 201a, the following steps are included:

[0176] After the display material layer and the encapsulation layer 5 are prepared on the display panel 10 by evaporation and CVD sedimentation, the first opening 201a and the encapsulation layer 5 covering the peripheral isolation structure 2 are covered with photoresist for protection, and then the encapsulation layer 5 and the display material layer that are not covered by the photoresist are removed by etching in a graphical manner, and then the photoresist is removed to prepare the light-emitting device 4 in the first opening 201a and the encapsulation layer 5 covering the light-emitting device 4 and the first opening 201a.

[0177] The above process is repeated to prepare the light emitting device 4 and the encapsulation layer 5 in the second opening 201 b and the third opening 201 c respectively.

[0178] Please refer to the flowchart of the manufacturing method of the display panel 10 provided in the embodiment of the present application. Figure 6 , the preparation method comprises:

[0179] Step S1, preparing an isolation structure 2 on one side of a substrate 1, the isolation structure 2 encloses an isolation opening 201, the isolation structure 2 includes a support portion 21 and a crown portion 22, the crown portion 22 is located on the side of the support portion 21 facing away from the substrate 1, and at least part of the crown portion 22 is inclined toward the substrate 1 at one end thereof close to the isolation opening 201; the support portion 21 has a first surface 202 on the side facing away from the crown portion 22, and the crown portion 22 has a second surface 203 on the side facing away from the support portion 21, the isolation opening 201 includes a first opening 201a, a second opening 201b and a third opening 201c, and the first surface 202 is close to the first opening 201a at one end thereof on the substrate 1. 1 and the orthographic projection of the second surface 203 near the first opening 201a on the substrate 1 is a first length; the distance between the orthographic projection of the first surface 202 near the second opening 201b on the substrate 1 and the orthographic projection of the second surface 203 near the second opening 201b on the substrate 1 is a second length; the distance between the orthographic projection of the first surface 202 near the third opening 201c on the substrate 1 and the orthographic projection of the second surface 203 near the third opening 201c on the substrate 1 is a third length; wherein the first length is not less than the second length, and the second length is not less than the third length.

[0180] Step S2 , preparing a light emitting device 4 in the isolation opening 201 , and preparing a packaging layer 5 covering the isolation structure 2 on the side of the light emitting device 4 facing away from the substrate 1 .

[0181] The light emitting device 4 comprises a first electrode 41, a light emitting functional layer 42 and a second electrode 43, wherein the light emitting functional layer 42 comprises a first light emitting functional layer 42a, a second light emitting functional layer 42b and a third light emitting functional layer 42c with different light emitting colors.

[0182] In some embodiments, the wavelength of light emitted from the first light-emitting functional layer 42a is smaller than the wavelength of light emitted from the second light-emitting functional layer 42b, and the wavelength of light emitted from the second light-emitting functional layer 42b is smaller than the wavelength of light emitted from the third light-emitting functional layer 42c.

[0183] Specifically, the emitted light of the first light emitting functional layer 42a is blue light, the emitted light of the second light emitting functional layer 42b is green light, and the emitted light of the third light emitting functional layer 42c is red light.

[0184] Accordingly, the light emitting device 4 also includes a first light emitting device, a second light emitting device and a third light emitting device with different light emitting colors. When preparing light emitting devices 4 in different isolation openings 201, light emitting devices 4 with different light emitting colors can be selected in sequence for preparation according to design requirements.

[0185] In some embodiments, step S2 includes:

[0186] Step S21, preparing a first display material layer on the isolation structure 2, forming an encapsulation material layer on the side of the first display material layer facing away from the substrate 1, etching and patterning the encapsulation material layer and the first display material layer to form a first light-emitting device located in the first opening 201a, and an encapsulation layer 5 covering the first opening 201a;

[0187] Step S22, preparing a second display material layer on the isolation structure 2, forming an encapsulation material layer on the side of the second display material layer facing away from the substrate 1, etching and patterning the encapsulation material layer and the second display material layer to form a second light-emitting device located in the second opening 201b, and an encapsulation layer 5 covering the second opening 201b;

[0188] Step S23, prepare a third display material layer on the isolation structure 2, form an encapsulation material layer on the side of the third display material layer facing away from the substrate 1, etch and pattern the encapsulation material layer and the third display material layer to form a third light-emitting device located in the third opening 201c, and an encapsulation layer 5 covering the third opening 201c.

[0189] It should be noted that the preparation order of the light emitting devices 4 in each isolation opening 201 in the above step S2 is determined according to the orthographic projection distance of the first surface 202 and the second surface 203 close to the isolation opening 201. As the distance decreases, the light emitting devices 4 are prepared in sequence in the corresponding isolation openings 201.

[0190] The manufacturing method can be used to manufacture the display panel 10 provided in the above embodiments. The other structures of the display panel 10 can be found in the above description and will not be described again.

[0191] It can be understood that the preparation method of the display panel 10 provided in the embodiment of the present application can increase the coverage area of ​​the second electrode 43 prepared by the post-process by adjusting the shape of the crown 22 to make it tilted and adjusting different crowns 22 to have different tilt angles, and improve the overlap yield between the second electrode 43 and the side wall of the isolation structure 2, so as to reduce the dark spot failure of the display panel 10 caused by poor overlap of the second electrode 43, help improve the reliability of the prepared display panel 10, and improve the display effect and performance of the display panel 10.

[0192] In a third aspect, the present application embodiment further provides a display device 100, see Figure 7 The display device 100 includes any one of the display panels 10 described above.

[0193] The display device 100 provided in this embodiment can be a mobile phone, a notebook, a tablet computer, a smart watch, a smart bracelet, a navigator, a display, a personal digital assistant (PDA), and other products or components with display functions.

[0194] Since the display device 100 has the above-mentioned display panel 10 , it has at least one or more advantages and beneficial effects of the above-mentioned display panel 10 . The specific effects are described above and will not be repeated here.

[0195] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: Base (1); An isolation structure (2) is located on one side of the base (1), the isolation structure (2) comprises a support portion (21) and a crown portion (22), the crown portion (22) is located on the side of the support portion (21) facing away from the base (1), the side of the support portion (21) facing away from the crown portion (22) has a first surface (202), and the side of the crown portion (22) facing away from the support portion (21) has a second surface (203), an isolation opening (201) is provided on the isolation structure (2), the isolation opening (201) is formed by enclosing the support portion (21) and the crown portion (22), and an end of the crown portion (22) close to the isolation opening (201) is inclined towards a direction close to the base (1); The isolation opening (201) comprises a first opening (201a), a second opening (201b) and a third opening (201c); the distance between the orthographic projection of one end of the first surface (202) close to the first opening (201a) on the substrate (1) and the orthographic projection of one end of the second surface (203) close to the first opening (201a) on the substrate (1) is a first length; the distance between the orthographic projection of one end of the first surface (202) close to the second opening (201b) on the substrate (1) and the orthographic projection of one end of the second surface (203) close to the second opening (201b) on the substrate (1) is a second length; the distance between the orthographic projection of one end of the first surface (202) close to the third opening (201c) on the substrate (1) and the orthographic projection of one end of the second surface (203) close to the third opening (201c) on the substrate (1) is a third length; The first length is not less than the second length, and the second length is not less than the third length.

2. The display panel according to claim 1, characterized in that: The crown portion (22) comprises a first sub-portion (221) and a second sub-portion (222), wherein the second sub-portion (222) is located on a side of the first sub-portion (221) close to the isolation opening (201); an end of the first sub-portion (221) facing away from the base (1) is a first end surface (2211), and an end of the second sub-portion (222) facing away from the base (1) is a second end surface (2221), the second end surface (2221) is inclined relative to the base (1), and a side of the second end surface (2221) facing away from the base (1) is connected to the first end surface (2211) and forms the first surface (202); In a cross-sectional direction perpendicular to the base (1), an angle between a plane where the first end face (2211) is located and a plane where the second end face (2221) is located is an inclination angle, and the inclination angle is an acute angle.

3. The display panel according to claim 2, characterized in that: The inclination angle corresponding to the first opening (201a) is a first inclination angle, the inclination angle corresponding to the second opening (201b) is a second inclination angle, and the inclination angle corresponding to the third opening (201c) is a third inclination angle; Wherein, the first inclination angle is not greater than the second inclination angle, and the second inclination angle is not greater than the third inclination angle.

4. The display panel according to claim 3, characterized in that: The first inclination angle is not greater than 40°, the second inclination angle is in the range of 20° to 70°, and the third inclination angle is in the range of 50° to 89°.

5. The display panel according to claim 3, characterized in that: The first inclination angle, the second inclination angle and the third inclination angle are the same, the length of the second end surface (2221) corresponding to the first opening (201a) is greater than the length of the second end surface (2221) corresponding to the second opening (201b), and the length of the second end surface (2221) corresponding to the second opening (201b) is greater than the length of the second end surface (2221) corresponding to the third opening (201c).

6. The display panel according to claim 2, characterized in that: The first sub-section (221) and the second sub-section (222) are an integrated structure, and the second sub-section (222) is arranged around the first sub-section (221).

7. The display panel according to any one of claims 1 to 6, characterized in that: The display panel (10) further comprises a pixel definition layer (3), wherein the pixel definition layer (3) is located between the substrate (1) and the isolation structure (2), and a pixel opening (301) is provided on the pixel definition layer (3), wherein the pixel opening (301) is arranged opposite to and connected to the isolation opening (201).

8. The display panel according to claim 7, characterized in that: The display panel (10) further comprises: A display function layer, located on the substrate (1) and comprising a plurality of light-emitting devices (4) located in the corresponding isolation openings (201), wherein portions of the light-emitting devices (4) cover a side of the pixel definition layer (3) facing away from the substrate (1) through the pixel openings (301); The encapsulation layer (5) is located on the side of the isolation structure (2) and the light-emitting device (4) facing away from the substrate (1), and at least part of the encapsulation layer (5) covering the side of the crown (22) is closed to the part covering the light-emitting device (4).

9. The display panel according to claim 8, characterized in that: The light-emitting device (4) comprises a first electrode (41), a light-emitting functional layer (42) and a second electrode (43) which are sequentially stacked on the substrate (1); The light-emitting functional layer (42) and the second electrode (43) of each light-emitting device (4) are located in the corresponding isolation opening (201), the first electrode (41) of each light-emitting device (4) is located between the pixel definition layer (3) and the substrate (1), and the first electrode (41) is exposed from the corresponding pixel opening (301) and is in contact with the light-emitting functional layer (42).

10. The display panel according to claim 9, characterized in that: The second electrode (43) covers the surface of the light-emitting functional layer (42) on the side facing away from the substrate (1) and overlaps with an end of the support portion (21) close to the substrate (1).

11. The display panel according to claim 9, characterized in that: The light-emitting functional layer (42) comprises a first light-emitting functional layer (42a), a second light-emitting functional layer (42b) and a third light-emitting functional layer (42c) emitting light of different colors; Wherein, at least one of the first light-emitting functional layer (42a), the second light-emitting functional layer (42b) and the third light-emitting functional layer (42c) is disposed in each of the isolation openings (201); Preferably, the wavelength of the light emitted by the first light-emitting functional layer (42a) is smaller than the wavelength of the light emitted by the second light-emitting functional layer (42b), and the wavelength of the light emitted by the second light-emitting functional layer (42b) is smaller than the wavelength of the light emitted by the third light-emitting functional layer (42c); Preferably, the output light of the first light-emitting functional layer (42a) is blue light, the output light of the second light-emitting functional layer (42b) is green light, and the output light of the third light-emitting functional layer (42b) is red light.

12. The display panel according to claim 8, characterized in that: The encapsulation layer (5) comprises: A first packaging portion (51) is located on a side of the isolation structure (2) facing away from the substrate (1); A second packaging portion (52), located on a side of the light-emitting device (4) facing away from the substrate (1), and connected to the first packaging portion (51); The second packaging portion (52) covers the light-emitting device (4) and at least a portion of an outer wall of the isolation structure (2) close to the isolation opening (201).

13. The display panel according to claim 12, characterized in that: In a direction perpendicular to the substrate (1), there is a gap between adjacent first packaging portions (51) and a surface of a side of the crown portion (22) facing away from the substrate (1).

14. The display panel according to claim 8, characterized in that: The encapsulation layer (5) defines a closed chamber (S) on a side of the isolation structure (2) facing the isolation opening (201).

15. The display panel according to claim 1, characterized in that: The orthographic projection of the support portion (21) on the base (1) is located within the orthographic projection of the crown portion (22) on the base (1); Preferably, the support portion (21) comprises at least two superimposed sub-support portions (211), and an orthographic projection of the sub-support portion (211) farther from the substrate (1) on the substrate (1) is located within the range of an orthographic projection of the sub-support portion (211) closer to the substrate (1) on the substrate (1); Preferably, the orthographic projection of the sub-support portion (211) closest to the base (1) on the base (1) is located within the range of the orthographic projection of the crown portion (22) on the base (1); Preferably, in the normal cross section of the display panel (10), the cross-sectional profile of the portion of the support portion (21) located between two adjacent isolation openings (201) is one of a rectangle, a trapezoid and an inverted trapezoid.

16. A method for preparing a display panel, characterized in that: include: Providing a substrate (1); An isolation structure (2) is prepared on one side of the substrate (1), the isolation structure (2) comprising a support portion (21) and a crown portion (22), the crown portion (22) being located on the side of the support portion (21) facing away from the substrate (1), the side of the support portion (21) facing away from the crown portion (22) comprising a first surface (202), and the side of the crown portion (22) facing away from the support portion (21) comprising a second surface (203), an isolation opening (201) is provided on the isolation structure (2), the isolation opening (201) is formed by enclosing the support portion (21) and the crown portion (22), and an end of the crown portion (22) close to the isolation opening (201) is inclined towards a direction close to the substrate (1); the isolation opening (201) comprises a first opening (201a), a second opening (201b) and a third opening (201c). 01c), the distance between the orthographic projection of one end of the first surface (202) close to the first opening (201a) on the substrate (1) and the orthographic projection of one end of the second surface (203) close to the first opening (201a) on the substrate (1) is a first length; the distance between the orthographic projection of one end of the first surface (202) close to the second opening (201b) on the substrate (1) and the orthographic projection of one end of the second surface (203) close to the second opening (201b) on the substrate (1) is a second length; the distance between the orthographic projection of one end of the first surface (202) close to the third opening (201c) on the substrate (1) and the orthographic projection of one end of the second surface (203) close to the third opening (201c) on the substrate (1) is a third length; The first length is not less than the second length, and the second length is not less than the third length.

17. The method for preparing a display panel according to claim 16, characterized in that: After the step of preparing an isolation structure (2) on one side of the substrate (1), wherein the isolation structure (2) encloses an isolation opening (201), the method further comprises: A light-emitting device (4) is prepared in the isolation opening (201), and a packaging layer (5) covering the isolation structure (2) is prepared on the side of the light-emitting device (4) facing away from the substrate (1).

18. The method for preparing a display panel according to claim 17, characterized in that: The method of preparing a light-emitting device (4) in the isolation opening (201), and preparing an encapsulation layer (5) covering the isolation structure (2) on a side of the light-emitting device (4) facing away from the substrate (1), comprises: Preparing a display material layer on the isolation structure (2), forming an encapsulation material layer on the side of the display material layer facing away from the substrate (1), etching and patterning the encapsulation material layer and the display material layer to form a light-emitting device (4) located in the first opening (201a), and an encapsulation layer (5) covering the first opening (201a); Preparing a display material layer on the isolation structure (2), forming an encapsulation material layer on the side of the display material layer facing away from the substrate (1), etching and patterning the encapsulation material layer and the display material layer to form a light-emitting device (4) located in the second opening (201b), and an encapsulation layer (5) covering the second opening (201b); A display material layer is prepared on the isolation structure (2), an encapsulation material layer is formed on the side of the display material layer facing away from the substrate (1), and the encapsulation material layer and the display material layer are etched and patterned to form a light-emitting device (4) located in the third opening (201c), and an encapsulation layer (5) covering the third opening (201c).

19. A display device, characterized in that: A display panel (10) comprising any one of claims 1 to 15.

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