A display panel, a display device, and a preparation method of a display panel

Abstract

The application provides a display panel, a display device and a preparation method of the display panel, and relates to the technical field of display panels. The display panel comprises a substrate, a light emitting element layer, a protective layer, a buffer layer and a refractive layer. The light emitting element layer comprises a plurality of light emitting elements. The protective layer has an opening corresponding to the position of the light emitting element. The inner wall of the opening is arranged in a direction away from the light emitting element. The buffer layer covers at least the surface of the protective layer away from the substrate and the inner wall of the opening. The refractive layer covers the buffer layer and fills the opening of the protective layer. The refractive index of the protective layer is less than the refractive index of the refractive layer. The refractive index of the buffer layer is greater than or equal to the refractive index of the protective layer, and the refractive index of the buffer layer is less than or equal to the refractive index of the refractive layer. The application introduces the buffer layer between the protective layer and the refractive layer, separates the protective layer and the refractive layer, avoids the swelling and profile deformation of the protective layer, avoids the peeling of the buffer layer and the protective layer and / or the refractive layer, and guarantees the light extraction efficiency of the display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display panel, in particular to a display panel, a display device and a preparation method of the display panel. BACKGROUND

[0002] With the increasing requirements of consumers and terminal manufacturers on the brightness and lifetime of active matrix organic light-emitting diode display screens, developing organic light-emitting diode materials and devices with higher efficiency has become the top priority of material and panel manufacturers. Micro lens array structure uses total reflection principle to adjust the incident angle of light reaching the cover plate interface, which is a research hotspot in recent years, and its light extraction efficiency is effectively improved. However, in actual projects, due to the poor compatibility of high refractive index materials and protective layer materials, the protective layer swells and deforms, and even the adjacent functional layers peel off. These situations will all lead to a decrease in light extraction efficiency. The possible physical process may be that the solvent of high refractive material penetrates into the protective layer, causing the protective layer to swell, deform or peel off.

[0003] In summary, it is necessary to improve the structure design of the display panel to completely improve the compatibility of high refractive materials and protective layer materials, which can expand the selection range of materials, improve performance and reduce costs. SUMMARY

[0004] The technical problem solved by the present application is the poor compatibility of protective layer materials and refractive layer materials in the micro lens structure of the display panel, the swelling and profile deformation of the protective layer, or the peeling of adjacent functional layers.

[0005] To solve the above technical problems, one technical solution adopted by the present application is: a display panel, comprising:

[0006] a substrate;

[0007] a light-emitting element layer disposed on the substrate, the light-emitting element layer comprising a plurality of arrayed light-emitting elements;

[0008] a protective layer disposed on a side of the light-emitting element layer away from the substrate; the protective layer has openings corresponding to positions of the light-emitting elements; inner walls of the openings are inclinedly disposed away from the light-emitting elements;

[0009] a buffer layer disposed on a side of the protective layer away from the substrate; the buffer layer covers at least a surface of the protective layer away from the substrate and inner walls of the openings;

[0010] a refractive layer disposed on a side of the buffer layer away from the substrate; the refractive layer covers the buffer layer and fills the openings of the protective layer;

[0011] wherein the refractive index of the protective layer is less than the refractive index of the refractive layer; the refractive index of the buffer layer is greater than or equal to the refractive index of the protective layer, and the refractive index of the buffer layer is less than or equal to the refractive index of the refractive layer.

[0012] Preferably, the protective layer is located around the light-emitting element.

[0013] Optionally, the protective layer comprises first shielding strips; a plurality of the first shielding strips are arranged alternately with a plurality of rows of the light-emitting elements.

[0014] Optionally, the protective layer comprises first shielding strips and second shielding strips; a plurality of the first shielding strips are arranged alternately with a plurality of rows of the light-emitting elements; a plurality of the second shielding strips are arranged alternately with a plurality of columns of the light-emitting elements.

[0015] Preferably, the protective layer comprises shielding blocks, a plurality of the shielding blocks are arranged at intervals along the circumference of the light-emitting element.

[0016] Optionally, the shielding blocks comprise first shielding blocks and second shielding blocks, two of the first shielding blocks are arranged on opposite sides of the light-emitting element along a first direction, and two of the second shielding blocks are arranged on opposite sides of the light-emitting element along a second direction, the second direction being perpendicular to the first direction.

[0017] More preferably, the first shielding strip, the second shielding strip, or the shielding block has a trapezoidal or plano-convex lens shape in cross section; wherein the convex part of the plano-convex lens shape is away from the side of the substrate facing the light-emitting element layer.

[0018] Preferably, the buffer layer also covers the part of the light-emitting element layer exposed through the opening; or the buffer layer has an opening corresponding to the opening.

[0019] Preferably, the material for forming the protective layer comprises one or more of acrylic organic polymers, siloxane organic polymers, and polyimide organic polymers; and / or

[0020] The material for forming the refractive layer comprises one or more of polymethyl methacrylate and polyphenylsulfone terephthalamide.

[0021] Preferably, the refractive layer is further doped with inorganic particles; the refractive index of the inorganic particles is higher than the refractive index of the buffer layer.

[0022] Optionally, the refractive layer is prepared by inkjet printing.

[0023] Preferably, the material for forming the buffer layer comprises SiO x , SiOx N y and SiN x one or more of SiO

[0024] Optionally, the buffer layer is prepared by evaporation or chemical vapor deposition.

[0025] To solve the above technical problems, another technical solution adopted by the present application is: a preparation method of a display panel, comprising:

[0026] providing a substrate, setting a light emitting element layer on the substrate, the light emitting element layer comprising a plurality of arrayed light emitting elements;

[0027] preparing a whole-layer protection layer on a side of the light emitting element layer away from the substrate, patterning the protection layer so that the protection layer has an opening corresponding to the position of the light emitting element;

[0028] setting a buffer layer on a side of the protection layer away from the substrate; the buffer layer covering at least the surface of the protection layer away from the substrate and the inner wall of the opening;

[0029] setting a refractive layer on a side of the buffer layer away from the substrate;

[0030] wherein the refractive index of the buffer layer is greater than or equal to the refractive index of the protection layer, and the refractive index of the buffer layer is less than or equal to the refractive index of the refractive layer; the refractive index of the refractive layer is greater than the refractive index of the protection layer.

[0031] Preferably, the refractive layer is prepared by inkjet printing.

[0032] Optionally, the forming material of the protection layer comprises one or more of acrylic organic polymer, siloxane organic polymer and polyimide organic polymer; and / or

[0033] the forming material of the refractive layer comprises one or more of polymethyl methacrylate and polyphenylsulfone terephthalamide;

[0034] the forming material of the buffer layer comprises one or more of SiO x , SiO x N y and SiN x .

[0035] Beneficial Effects: The display panel provided by this invention includes: a substrate, a light-emitting element layer, a protective layer, a buffer layer, and a refractive layer. The light-emitting element layer includes multiple light-emitting elements; the protective layer has openings corresponding to the positions of the light-emitting elements; the inner walls of the openings are inclined away from the light-emitting elements; the buffer layer at least covers the surface of the protective layer away from the substrate and the inner walls of the openings; the refractive layer covers the buffer layer and fills the openings of the protective layer; wherein, the refractive index of the protective layer is less than the refractive index of the refractive layer; the refractive index of the buffer layer is greater than or equal to the refractive index of the protective layer, and the refractive index of the buffer layer is less than or equal to the refractive index of the refractive layer. In the specific embodiments of this application, a buffer layer is introduced between the protective layer and the refractive layer to separate the protective layer and the refractive layer, avoiding problems such as swelling and contour deformation of the protective layer, and avoiding peeling between the buffer layer and the protective layer and / or the refractive layer, thus ensuring the light extraction efficiency of the display panel. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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, wherein:

[0037] Figure 1 This is a schematic diagram of the first structure of the display panel provided in the embodiments of this application;

[0038] Figure 2 This is a schematic diagram of the first structure of the protective layer of the display panel provided in the embodiments of this application;

[0039] Figure 3 This is a schematic diagram of a second structure of the protective layer of the display panel provided in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of a third structure of the protective layer of the display panel provided in the embodiments of this application;

[0041] Figure 5 This is a schematic diagram of a second structure of the display panel provided in an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the structure of the display device provided in the embodiments of this application. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0044] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] Please see Figure 1 , Figure 1 This is a schematic diagram of the first structure of the display panel provided in the embodiments of this application.

[0048] See Figure 1This application provides a display panel, including a substrate 10, a light-emitting element layer 20, a protective layer 30, a buffer layer 40, and a refractive layer 50. The light-emitting element layer 20 is disposed on the substrate 10 and includes a plurality of light-emitting elements 21 arranged in an array. The protective layer 30 is disposed on the side of the light-emitting element layer 20 away from the substrate 10, and the protective layer 30 has an opening corresponding to the position of the light-emitting element 21; the inner wall of the opening is inclined away from the light-emitting element 21. Further, the protective layer 30 is located around the light-emitting element 21. In a specific embodiment of this application, the angle between the inner wall of the opening and the bottom surface is an acute angle. This arrangement makes the width or diameter of the opening on the side away from the substrate 10 larger than the width or diameter on the side closer to the substrate 10, facilitating the emission of light rays. It is understood that if the angle between the inner wall of the opening and the bottom surface is an obtuse angle, making the width or diameter of the opening on the side away from the substrate 10 smaller than the width or diameter on the side closer to the substrate 10, it is not conducive to the emission of light rays. The refractive layer 50 is disposed on the side of the protective layer 30 away from the substrate 10.

[0049] Specifically, the display panel provided in this application embodiment can be an organic light-emitting display panel, which has the advantages of self-illumination, high brightness, wide viewing angle, and fast response. It does not require a backlight and can use a thin organic material coating as the light-emitting unit. When current passes through, these organic materials emit light. Organic light-emitting display panels can be made lighter and thinner, with a wider viewing angle, and can significantly save energy. The substrate 10 provided in this application embodiment can include a substrate and a device layer. The substrate can be a flexible substrate or a rigid substrate; this application does not specifically limit it. The device layer is disposed on the substrate and can include several thin-film transistor devices and circuit wiring (not shown). The device layer is a structure known to those skilled in the art, and this application will not elaborate further. The light-emitting element layer 20 provided in this application embodiment can include an anode, a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, an electron injection layer, and a cathode (not shown). The organic light-emitting layer includes a blue light-emitting layer, a green light-emitting layer, a red light-emitting layer, and may also include other color light-emitting layers. The light-emitting element layer 20 is a structure known to those skilled in the art, and this application will not elaborate further.

[0050] The protective layer 30 and the refractive layer 50 in the specific embodiments of this application are configured to cause large-angle light emitted by multiple light-emitting elements 21 to undergo total internal reflection at the junction of the protective layer 30 and the refractive layer 50, thereby converging the large-angle light towards the central area and finally emitting it to the outside of the display panel, reducing the light loss of the light-emitting elements 21. To achieve the converging effect of large-angle light, there are certain requirements for the refractive index of the materials of the protective layer 30 and the refractive layer 50. Specifically, the refractive index of the protective layer 30 is less than the refractive index of the refractive layer 50.

[0051] Specifically, the protective layer 30 is formed from one or more of acrylic organic polymers, siloxane organic polymers, and polyimide organic polymers. The refractive layer 50 is formed from one or more of polymethyl methacrylate and polyphenylene sulfone terephthalamide. Furthermore, the refractive layer 50 is prepared by inkjet printing. If the protective layer 30 and the refractive layer 50 are in direct contact, the solvent introduced by the inkjet-printed refractive layer 50 can easily penetrate the protective layer 30, causing swelling, contour deformation, or even peeling of the protective layer 30 from the refractive layer 50, resulting in low light extraction efficiency.

[0052] Therefore, in this specific embodiment, a buffer layer 40 is introduced, which is disposed between the protective layer 30 and the refractive layer 50; the buffer layer 40 at least covers the surface of the protective layer 30 away from the substrate 10 and the inner wall of the opening of the protective layer 30. Specifically, in this embodiment, the buffer layer 40 covers the protective layer 30 and the opening between the protective layers 30. The material forming the buffer layer 40 includes: SiO x SiO x N y and SiN x One or more of the following. The buffer layer 40 is provided to separate the protective layer 30 and the refractive layer 50, to prevent the solvent introduced by the refractive layer 50 from seeping into the protective layer 30, to prevent the protective layer 30 from swelling, deforming and peeling, and to ensure the light extraction efficiency of the display panel.

[0053] Furthermore, the buffer layer 40 is prepared by vapor deposition or chemical vapor deposition, simplifying the fabrication process and improving the bonding strength between the buffer layer 40 and the protective layer 30, and between the buffer layer 40 and the refractive layer 50. In some specific embodiments, the thickness of the buffer layer 40 can be 10nm to 1000nm, for example, any one of 10nm, 250nm, 500nm, 750nm, and 1000nm. It is understood that if the thickness of the buffer layer 40 is too small, such as 5nm, it has little impact on increasing the bonding strength between the buffer layer 40 and the protective layer 30 and / or the refractive layer 50; if the thickness of the buffer layer 40 is too large, such as 1500nm, it will significantly increase the production capacity. To ensure that the light extraction effect remains unchanged, there are certain requirements for the refractive index of the buffer layer 40. Specifically, the refractive index of the buffer layer 40 is greater than or equal to the refractive index of the protective layer 30, and the refractive index of the buffer layer 40 is less than or equal to the refractive index of the refractive layer 50. For example, the refractive index of the buffer layer 40 can be equal to the refractive index of the protective layer 30, or equal to the refractive index of the refractive layer 50, or it can be between the refractive index of the protective layer 30 and the refractive index of the refractive layer 50.

[0054] In some specific embodiments, the display panel of this application further includes an encapsulation layer 60, which is disposed on the side of the light-emitting element layer 20 away from the substrate 10. The encapsulation layer 60 may include multiple layers of organic thin films and multiple layers of inorganic thin films stacked alternately, mainly used to prevent water, oxygen, and other substances in the external environment from corroding the light-emitting layer. The surface of the encapsulation layer 60 is an inorganic encapsulation film, such as silicon oxide or other inorganic oxides, thereby extending the service life of the light-emitting element layer 20. The encapsulation layer 60 is a structure known to those skilled in the art, and will not be described in detail in this application.

[0055] In some specific embodiments, the display panel of this application may further include a touch layer 70, which is disposed on the side of the encapsulation layer 60 away from the substrate 10. The touch layer 70 includes a plurality of touch electrodes, which are staggered with the plurality of light-emitting elements 21 to avoid affecting the light emission effect of the light-emitting elements 21.

[0056] In some specific embodiments, the display panel may further include a polarizer 80, which is disposed on the side of the refractive layer 50 away from the substrate 10. The polarizer 80 may include multiple layers of organic thin films and multiple layers of inorganic thin films alternately stacked. In this embodiment, the polarizer 80 includes a protective film 81, a pressure-sensitive adhesive layer 82, and a polarizing layer 83. The pressure-sensitive adhesive layer 82 may be formed of PSA (polyphenylene sulfone terephthalamide fiber). In some specific embodiments, the refractive index of at least one functional layer in the polarizer 80 may be less than the refractive index of the refractive layer 50, so that the light emitted by the light-emitting element 21 undergoes a certain degree of light scattering when passing through the polarizer 80, thereby increasing the light-emitting area of ​​the display panel.

[0057] Please see Figures 2-4 , Figure 2 This is a schematic diagram of the first structure of the protective layer of the display panel provided in the embodiments of this application. Figure 3 This is a schematic diagram of a second structure of the protective layer of the display panel provided in an embodiment of this application. Figure 4 This is a schematic diagram of a third structure of the protective layer of the display panel provided in the embodiments of this application.

[0058] See Figure 2 In this embodiment, the protective layer 30 includes first shielding strips 31; multiple first shielding strips 31 are alternately arranged with multiple rows of light-emitting elements 21. Specifically, the alternate arrangement in this embodiment refers to a first shielding strip 31 corresponding to the pixel isolation structure between two adjacent rows of light-emitting elements 21, and a row of light-emitting elements 21 corresponding to the opening between two adjacent rows of first shielding strips 31. This arrangement simplifies the fabrication process of the protective layer 30 and reduces the difficulty of the manufacturing process. It can be understood that the first shielding strips 31 and the light-emitting elements 21 are different layers; the alternate arrangement in this embodiment refers to the arrangement of the first shielding strips 31 and the light-emitting elements 21 on the substrate 10 in their orthogonal projections.

[0059] See Figure 3 In this embodiment, the protective layer 30 includes a first shielding strip 31 and a second shielding strip 32; a plurality of first shielding strips 31 are alternately arranged with a plurality of rows of light-emitting elements 21; a plurality of second shielding strips 32 are alternately arranged with a plurality of columns of light-emitting elements 21.

[0060] The alternating arrangement of multiple first shielding strips 31 and multiple rows of light-emitting elements 21 refers to the pixel isolation structure corresponding to one first shielding strip 31 and two adjacent rows of light-emitting elements 21, and the opening corresponding to one row of light-emitting elements 21 and two adjacent rows of first shielding strips 31. Similarly, the alternating arrangement of multiple second shielding strips 32 and multiple columns of light-emitting elements 21 refers to the pixel isolation structure corresponding to one second shielding strip 32 and two adjacent columns of light-emitting elements 21, and the opening corresponding to one column of light-emitting elements 21 and two adjacent columns of second shielding strips 32. It can be understood that the first shielding strips 31 and the light-emitting elements 21 are on different layers. The alternating arrangement in this embodiment refers to the arrangement of the first shielding strips 31, second shielding strips 32, and light-emitting elements 21 on the orthographic projection of different layers onto the substrate 10. This arrangement allows the large-angle light rays from multiple light-emitting elements 21 to undergo total internal reflection at the junction of the first shielding strip 31 and the refractive layer 50, and at the junction of the second shielding strip 32 and the refractive layer 50, thereby converging the large-angle light rays towards the central area and finally emitting them to the outside of the display panel, reducing the light loss of the light-emitting elements 21.

[0061] In some specific embodiments, the protective layer 30 includes shielding blocks 33, and multiple shielding blocks 33 are arranged at intervals along the circumference of the light-emitting element 21. This arrangement makes the side area of ​​the multiple shielding blocks 33 smaller than the side area of ​​the first shielding strip 31 and / or the second shielding strip 32, which is beneficial to improving the firmness of the bond between the shielding blocks 33 and the buffer layer 40.

[0062] See Figure 4 In this embodiment, the blocking block 33 includes a first blocking block 331 and a second blocking block 332. The two first blocking blocks 331 are disposed on opposite sides of the light-emitting element 21 along a first direction X, and the two second blocking blocks 332 are disposed on opposite sides of the light-emitting element 21 along a second direction Y, where the second direction Y is perpendicular to the first direction X. Further, the size of the first blocking block 331 along the second direction Y is larger than the minimum size of the two second blocking blocks 332 along the second direction Y, and / or the size of the second blocking block 332 along the first direction X is larger than the minimum size of the two first blocking blocks 331 along the first direction X. This arrangement allows the first blocking blocks 331 and the second blocking blocks 332 to effectively block the light emitted from the light-emitting element 21, improving the display effect of the display panel.

[0063] In the specific embodiments of this application, the cross-sectional shape of the first shielding strip 31, the second shielding strip 32, or the shielding block 33 is trapezoidal or plano-convex lens-shaped; wherein, the convex part of the plano-convex lens-shaped part faces the side of the light-emitting element layer 20 away from the substrate 10. The side of the trapezoid away from the substrate 10 can be set as a rounded corner (not shown in the figure), so that the interface between the protective layer 30 and the buffer layer 40 is firmly bonded and not easily peeled off.

[0064] Please see Figure 5 , Figure 5 This is a schematic diagram of a second structure of the display panel provided in an embodiment of this application.

[0065] See Figure 5 The display panel provided in this embodiment is the same as Figure 1 The difference in the display panel shown is that the buffer layer 40 has openings corresponding to the openings of the protective layer 30, and the buffer layer 40 only covers the surface of the protective layer 30 away from the substrate 10 and the inner wall of the openings of the protective layer 30, thereby reducing the impact on the light emission of the light-emitting element 21. In some specific embodiments, the thickness of the buffer layer 40 is the same everywhere, so as not to affect the light extraction of the display panel.

[0066] In this embodiment, the refractive layer 50 covers the buffer layer 40 and fills the opening of the protective layer 30. The buffer layer 40 and the refractive layer 50 form a plurality of arrayed microlens structures. The light emitted by the plurality of light-emitting elements 21 undergoes total internal reflection at the boundary of the arrayed microlens structures, thereby converging and focusing large-angle light towards the central region, reducing large-angle light loss and total internal reflection loss between film layers, which is beneficial to improving the forward light efficiency and light extraction efficiency of the display panel. Furthermore, in this embodiment, the refractive layer 50 is also doped with inorganic particles 51 to improve the light extraction effect of the display panel. Furthermore, the inorganic particles 51 are nanoscale in size, and the refractive index of the inorganic particles 51 is higher than or equal to the refractive index of the buffer layer 40. In some specific embodiments, the inorganic particles include one or both of nanoscale titanium dioxide and nanoscale zirconium oxide.

[0067] This application provides a specific embodiment of a method for manufacturing a display panel, including the following steps:

[0068] S1. Provide a substrate 10, and provide a light-emitting element layer 20 on the substrate 10. The light-emitting element layer 20 includes a plurality of light-emitting elements 21 arranged in an array.

[0069] S2. A whole protective layer 30 is prepared on the side of the light-emitting element layer 20 away from the substrate 10. The protective layer 30 is patterned. The patterned protective layer 30 has an opening at the position corresponding to the light-emitting element 21. The inner wall of the opening is inclined in the direction away from the light-emitting element 21.

[0070] S3. A buffer layer 40 is prepared on the side of the protective layer 30 away from the substrate 10 by means of vapor deposition or chemical vapor deposition. The buffer layer 40 at least covers the surface of the protective layer 30 away from the substrate 10 and the inner wall of the opening.

[0071] S4. A refractive layer 50 is prepared on the side of the buffer layer 40 away from the substrate 10 by inkjet printing, and the refractive layer 50 is cured by photocuring or thermal curing.

[0072] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

[0073] See Figure 6 The display device provided in this application embodiment includes the display panel in the above embodiment. The display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0074] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0075] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0076] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display panel, characterized in that, include: substrate; A light-emitting element layer is disposed on the substrate, and the light-emitting element layer includes a plurality of light-emitting elements arranged in an array; A protective layer is disposed on the side of the light-emitting element layer away from the substrate; the protective layer has an opening corresponding to the position of the light-emitting element; the inner wall of the opening is inclined in the direction away from the light-emitting element; the material forming the protective layer includes one or more of acrylic organic polymers, siloxane organic polymers, and polyimide organic polymers. A buffer layer is disposed on the side of the protective layer away from the substrate; the buffer layer at least covers the surface of the protective layer away from the substrate and the inner wall of the opening; the material forming the buffer layer includes: SiO2. x SiO x N y and SiN x One or more of the following; the thickness of the buffer layer is the same everywhere, and the thickness of the buffer layer is 10nm~1000nm; A refractive layer is disposed on the side of the buffer layer away from the substrate; the refractive layer covers the buffer layer and fills the opening of the protective layer; the refractive layer is formed of one or more of polymethyl methacrylate and polyphenylene sulfone terephthalamide; the refractive layer is prepared by inkjet printing. Wherein, the refractive index of the protective layer is less than the refractive index of the refractive layer; the refractive index of the buffer layer is greater than or equal to the refractive index of the protective layer, and the refractive index of the buffer layer is less than or equal to the refractive index of the refractive layer.

2. The display panel according to claim 1, characterized in that, The protective layer is located around the light-emitting element.

3. The display panel according to claim 1, characterized in that, The protective layer includes a first shielding strip; multiple first shielding strips are alternately arranged with multiple rows of light-emitting elements.

4. The display panel according to claim 1, characterized in that, The protective layer includes a first shielding strip and a second shielding strip; multiple first shielding strips are alternately arranged with multiple rows of light-emitting elements; multiple second shielding strips are alternately arranged with multiple columns of light-emitting elements.

5. The display panel according to claim 1, characterized in that, The protective layer includes shielding blocks, and a plurality of shielding blocks are arranged at circumferential intervals along the light-emitting element.

6. The display panel according to claim 5, characterized in that, The blocking block includes a first blocking block and a second blocking block. The two first blocking blocks are disposed on opposite sides of the light-emitting element along a first direction, and the two second blocking blocks are disposed on opposite sides of the light-emitting element along a second direction, which is perpendicular to the first direction.

7. The display panel according to claim 5, characterized in that, The protective layer includes a first shielding strip and a second shielding strip; the cross-sectional shape of the first shielding strip, the second shielding strip, or the shielding block is trapezoidal or plano-convex lens-shaped; wherein the convex portion of the plano-convex lens-shaped block faces the side of the light-emitting element layer away from the substrate.

8. The display panel according to claim 1, characterized in that, The buffer layer also covers the portion of the light-emitting element layer exposed through the opening; or the buffer layer has an opening corresponding to the opening.

9. The display panel according to claim 1, characterized in that, The refractive layer is also doped with inorganic particles; the refractive index of the inorganic particles is higher than that of the buffer layer.

10. The display panel according to claim 1, characterized in that, The buffer layer is prepared by vapor deposition or chemical vapor deposition.

11. A method for manufacturing a display panel, characterized in that, include: A substrate is provided, and a light-emitting element layer is disposed on the substrate, the light-emitting element layer comprising a plurality of light-emitting elements arranged in an array; A protective layer is formed on the side of the light-emitting element layer away from the substrate, and the protective layer is patterned so that the protective layer has an opening corresponding to the position of the light-emitting element; the material forming the protective layer includes one or more of acrylic organic polymers, siloxane organic polymers, and polyimide organic polymers. A buffer layer is disposed on the side of the protective layer away from the substrate; the buffer layer at least covers the surface of the protective layer away from the substrate and the inner wall of the opening; the material forming the buffer layer includes: SiO x SiO x N y and SiN x One or more of the following; the thickness of the buffer layer is the same everywhere, and the thickness of the buffer layer is 10nm~1000nm; A refractive layer is disposed on the side of the buffer layer away from the substrate; the refractive layer is formed of one or more of polymethyl methacrylate and polyphenylene sulfone terephthalamide; the refractive layer is prepared by inkjet printing. Wherein, the refractive index of the buffer layer is greater than or equal to the refractive index of the protective layer, and the refractive index of the buffer layer is less than or equal to the refractive index of the refractive layer; the refractive index of the refractive layer is greater than the refractive index of the protective layer.

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