Display panel and display device

Abstract

The application relates to a display panel and a display device. The display panel comprises a substrate, a positioning mark arranged on one side of the substrate, and a protection structure arranged on one side of the substrate. The protection structure comprises a dam and a protection layer. The dam forms an accommodation space, and at least part of the protection layer is located in the accommodation space. The protection layer is located on the side of the positioning mark away from the substrate, and the orthographic projection of the protection layer on the substrate covers the orthographic projection of the positioning mark on the substrate. The application is beneficial to improving the manufacturing yield and manufacturing efficiency.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display technology is considered the most promising new flat-panel display technology for the next generation. Compared with liquid crystal display technology, OLED display technology has advantages such as low energy consumption, low cost, self-luminescence, wide viewing angle, and fast response speed.

[0003] Traditional display panel manufacturing typically uses a fine metal mask (FMM) to pattern luminescent pixels. FMM technology is mature and boasts extensive mass production experience. However, it also suffers from limitations such as limited precision, high development costs, and long development cycles. FMM-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-area scalability, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe FMM-free technology for reference.

[0004] However, the manufacturing yield and efficiency of current OLED display panels need to be improved. Summary of the Invention

[0005] Based on this, it is necessary to provide a display panel and a display device that can improve manufacturing yield and manufacturing efficiency.

[0006] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0007] substrate;

[0008] an alignment mark, provided on one side of the substrate;

[0009] a protective structure disposed on one side of the substrate, the protective structure comprising a dam and a protective layer, the dam enclosing a receiving space, at least a portion of the protective layer being located within the receiving space;

[0010] The protective layer is located on a side of the alignment mark facing away from the substrate, and an orthographic projection of the protective layer on the substrate covers an orthographic projection of the alignment mark on the substrate.

[0011] The display panel provided in the embodiments of the present application utilizes a dam and a protective layer to form a protective structure. The dam encloses a space that facilitates the installation of the protective layer. The protective layer is located on the side of the alignment mark facing away from the substrate, and its orthographic projection covers the alignment mark. Thus, during the display panel manufacturing process, the protective layer protects the alignment mark, preventing damage to the alignment mark by the etching solution, ensuring the integrity of the alignment mark. This not only facilitates alignment in subsequent processes but also improves alignment accuracy, thereby increasing manufacturing yield and efficiency.

[0012] In one embodiment, the orthographic projection of the dam on the substrate surrounds at least a portion of the periphery of the orthographic projection of the alignment mark on the substrate.

[0013] In one embodiment, the orthographic projection of the dam on the substrate surrounds the entire periphery of the orthographic projection of the alignment mark on the substrate.

[0014] In one embodiment, the dam comprises a plurality of sub-dams, and the sub-dams are arranged in a ring shape and are sequentially spaced apart;

[0015] Alternatively, the orthographic projection of the dam on the substrate is an open loop shape, the two ends of the open loop shape are a starting end and an ending end, and there is an opening between the starting end and the ending end;

[0016] Alternatively, the orthographic projection shape of the dam on the substrate is a closed ring.

[0017] In one embodiment, the ratio of the thickness of the protective layer in the accommodation space to the thickness of the dam is between 0.6 and 1;

[0018] And / or, the light transmittance of the protective layer is greater than 30%.

[0019] In one embodiment, the protective layer is an inkjet printed film layer;

[0020] The material of the protective layer includes acrylic acid, polyethylene terephthalate, polycarbonate, and photosensitive resin;

[0021] The material of the dam includes organic material or metal.

[0022] In one embodiment, the reflectivity of the protective layer is lower than the reflectivity of the alignment mark.

[0023] In one embodiment, the display panel further includes:

[0024] An isolation structure is provided on one side of the substrate, and the isolation structure encloses and forms a plurality of isolation openings;

[0025] A plurality of light-emitting devices are provided on one side of the substrate and are arranged corresponding to the plurality of isolation openings, with at least a portion of each light-emitting device being arranged within the corresponding isolation opening; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked in a direction away from the substrate; the second electrode is electrically connected to the isolation structure;

[0026] The alignment mark and the first electrode are provided in the same layer and made of the same material.

[0027] In one embodiment, the display panel has a display area and a frame area surrounding the display area, the light emitting device and the isolation opening are located in the display area, and the alignment mark and the protection structure are located in the frame area.

[0028] In one embodiment, the dam and the isolation structure are provided in the same layer and with the same material.

[0029] In one embodiment, the display panel further includes a pixel defining layer, wherein the pixel defining layer encloses a plurality of pixel openings, and the plurality of pixel openings are correspondingly connected to the plurality of isolation openings;

[0030] The pixel defining layer is located between the isolation structure and the substrate, and between the protection structure and the alignment mark.

[0031] In one embodiment, the alignment mark is disposed in contact with the pixel defining layer; and / or the protection structure is disposed in contact with the pixel defining layer.

[0032] In one embodiment, the display panel further includes:

[0033] a plurality of packaging parts arranged at intervals, arranged corresponding to the plurality of light-emitting devices, the packaging parts being arranged on a side of the corresponding light-emitting device away from the substrate;

[0034] A first packaging layer is provided on a side of the plurality of packaging portions away from the substrate;

[0035] The second packaging layer is arranged on a side of the first packaging layer away from the substrate.

[0036] In one embodiment, the first encapsulation layer also covers the protection structure.

[0037] In one embodiment, the display panel further includes an array film layer, the array film layer includes multiple metal layers, and the alignment mark is provided in the same layer and made of the same material as one metal layer in the multiple metal layers;

[0038] The display panel has a display area and a border area arranged around the display area. The display panel also includes a plurality of light-emitting devices, which are arranged on a side of the array film layer away from the substrate and are located in the display area. The alignment mark and the protective structure are located in the border area.

[0039] In a second aspect, an embodiment of the present application provides a display panel, including:

[0040] substrate;

[0041] an alignment mark, provided on one side of the substrate;

[0042] An isolation structure is provided on one side of the substrate, and the isolation structure encloses and forms a plurality of isolation openings;

[0043] A plurality of light-emitting devices are provided on one side of the substrate and are arranged corresponding to the plurality of isolation openings, with at least a portion of each light-emitting device being arranged within the corresponding isolation opening; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked in a direction away from the substrate; the alignment mark is provided in the same layer and material as the first electrode;

[0044] The protection structure is provided on one side of the substrate, at least part of the protection structure is located on the side of the alignment mark away from the substrate, and the orthographic projection of the protection structure on the substrate covers the orthographic projection of the alignment mark on the substrate.

[0045] The display panel provided in the embodiments of the present application is provided with a protective structure, wherein the protective structure is located on the side of the alignment mark facing away from the substrate, and the orthographic projection of the protective structure covers the orthographic projection of the alignment mark. Thus, during the display panel manufacturing process, the protective structure protects the alignment mark, preventing damage to the alignment mark by the etching solution, ensuring the integrity of the alignment mark. This not only facilitates alignment in subsequent processes but also improves alignment accuracy, thereby increasing manufacturing yield and efficiency.

[0046] In one embodiment, the protective structure includes a dam and a protective layer, the dam is arranged to form a receiving space, and at least a portion of the protective layer is located in the receiving space;

[0047] The protective layer is located on a side of the alignment mark facing away from the substrate, and an orthographic projection of the protective layer on the substrate covers an orthographic projection of the alignment mark on the substrate.

[0048] In one embodiment, the display panel further includes a pixel defining layer, wherein the pixel defining layer encloses a plurality of pixel openings, and the plurality of pixel openings are correspondingly connected to the plurality of isolation openings;

[0049] The pixel defining layer is located between the isolation structure and the substrate, and between the protection structure and the alignment mark.

[0050] In one embodiment, the alignment mark is disposed in contact with the pixel defining layer; and / or the protection structure is disposed in contact with the pixel defining layer.

[0051] In a third aspect, the present application further provides a display device, which includes the display panel in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0053] Figure 1 A schematic plan view of a display panel provided in one embodiment of the present application.

[0054] Figure 2 for Figure 1 A schematic cross-sectional view of the alignment mark and protective structure in FIG.

[0055] Figure 3 for Figure 2 A plan view of the alignment marks and dams.

[0056] Figure 4 for Figure 2 Another plan view of the center alignment mark and embankment.

[0057] Figure 5 for Figure 2 Another plan view of the alignment mark and dam.

[0058] Figure 6 for Figure 1 Another cross-sectional structural diagram of the alignment mark and protective structure in FIG.

[0059] Figure 7 for Figure 1 A schematic cross-sectional view of a partial structure of a display panel is shown.

[0060] Figure 8 for Figure 1 Another cross-sectional schematic diagram of a partial structure of a display panel is shown.

[0061] Description of reference numerals:

[0062] 10. Display panel; 10a. Display area; 10b. Frame area; 11. Substrate; 12. Array film layer; 121. First insulating layer; 122. Second insulating layer; 123. Planarization layer; 13. Alignment mark; 14. Protective structure; 141. Dam; 1411. Sub-dam; 141a. Accommodation space; 141b. Opening; 142. Protective layer; 15. Isolation structure; 15a. Isolation opening; 151. Conductive portion; 152. Blocking portion; 16. Light-emitting device; 161. First electrode; 162. Light-emitting portion; 163. Second electrode; 17. Pixel defining layer; 181. Encapsulation portion; 182. First encapsulation layer; 183. Second encapsulation layer. DETAILED DESCRIPTION

[0063] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0064] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, they do not indicate any order, quantity or importance, but are simply used to distinguish different components. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. "Include" or "comprising" and similar words mean that the elements or objects that appear before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0066] As described in the background, the related art utilizes a fine metal mask-free process to manufacture OLED light-emitting devices. During the OLED light-emitting device manufacturing process, the alignment mark undergoes three etching steps, as each color of the light-emitting material and the corresponding encapsulation film layer are selectively etched once. However, during this etching process, the pixel defining layer above the alignment mark is overetched by the chemical solution, resulting in etching damage to the alignment mark. This not only affects the alignment of subsequent processes but also reduces alignment accuracy, thereby lowering manufacturing yield and efficiency.

[0067] In view of this, the embodiments of the present application provide a display panel and a display device, in which a protective structure is set above the alignment mark. In this way, during the preparation of the display panel, the protective structure protects the alignment mark, can prevent the etching solution from damaging the alignment mark, and ensure the integrity of the alignment mark. This not only facilitates alignment in subsequent processes, but also improves alignment accuracy, thereby improving manufacturing yield and manufacturing efficiency.

[0068] First, refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a display panel 10, which may be an organic light emitting diode display panel 10 (Organic Light Emitting Diode, referred to as OLED) or a quantum dot electroluminescent display panel 10 (Quantum Dot Light Emitting Diodes, referred to as QLED).

[0069] The display panel 10 includes a substrate 11, an alignment mark 13, and a protective structure 14. Both the alignment mark 13 and the protective structure 14 are located on one side of the substrate 11. The protective structure 14 includes a dam 141 and a protective layer 142. The dam 141 encloses a receiving space 141a, and at least a portion of the protective layer 142 is located within the receiving space 141a.

[0070] The protective layer 142 is located on the side of the alignment mark 13 facing away from the substrate 11 , and the orthographic projection of the protective layer 142 on the substrate 11 covers the orthographic projection of the alignment mark 13 on the substrate 11 . In other words, the protective layer 142 is located above the alignment mark 13 .

[0071] It should be noted that, during the process of manufacturing the display panel 10 , each mask layer needs to be aligned with the target structure layer using the alignment mark 13 .

[0072] Here, the protective structure 14 refers to a structure that protects the alignment mark 13 from being damaged by the etching process. Alternatively, the protective structure 14 refers to a structure that protects the alignment mark 13 and the film layer located above the alignment mark 13 from being damaged by the etching process.

[0073] It is understood that the substrate 11 can be a flexible substrate 11, such as a polyimide (PI) substrate 11, a polyethylene terephthalate (PET) substrate 11, or a polymethyl methacrylate (PMMA) substrate 11. The substrate 11 can also be a rigid substrate 11, such as glass. It should be noted that the substrate 11 may be provided with film structures such as an array film layer 12, a light-emitting device layer, an encapsulation layer, and a touch control layer, which are not described in detail in the present embodiment.

[0074] The display panel 10 provided in the embodiment of the present application forms a protective structure 14 by setting a dam 141 and a protective layer 142, wherein the dam 141 is arranged to form a receiving space 141a, and the receiving space 141a is used to set the protective layer 142. In some embodiments, the material of the protective layer 142 is an organic material, and the dam 141 is conducive to gathering the organic material together to solidify to form the protective layer 142, thereby preventing the organic material from overflowing to other areas. The protective layer 142 is located on the side of the alignment mark 13 away from the substrate 11, and the positive projection of the protective layer 142 covers the positive projection of the alignment mark 13. In this way, in the process of preparing the display panel 10, the protective layer 142 protects the alignment mark 13, can prevent the etching solution from damaging the alignment mark 13, and ensures the integrity of the alignment mark 13, which not only facilitates the alignment of subsequent processes, but also improves the alignment accuracy, thereby improving the manufacturing yield and manufacturing efficiency.

[0075] In one embodiment, referring to Figure 3 and Figure 4 As shown, the orthographic projection of the dam 141 on the substrate 11 surrounds at least a portion of the periphery of the orthographic projection of the alignment mark 13 on the substrate 11. This ensures that the accommodation space 141a formed by the dam 141 is located above the alignment mark 13, thereby ensuring that the protective layer 142 is located above the alignment mark 13.

[0076] Furthermore, the orthographic projections of the dam 141 and the protective layer 142 may have the following conditions:

[0077] In one example, the orthographic projection of the dam 141 on the substrate 11 surrounds at least a portion of the periphery of the orthographic projection of the protection layer 142 on the substrate 11. In other words, the dam 141 surrounds at least a portion of the periphery of the protection layer 142.

[0078] In another example, the orthographic projection of the dam 141 on the substrate 11 overlaps with the orthographic projection of the protection layer 142 on the substrate 11. In other words, a portion of the protection layer 142 is located in the receiving space 141a, and another portion of the protection layer 142 is located on the top surface of the dam 141.

[0079] In one embodiment, Figure 3 As shown, the orthographic projection of the dam 141 on the substrate 11 surrounds the entire periphery of the orthographic projection of the alignment mark 13 on the substrate 11. This ensures that the accommodation space 141a formed by the dam 141 is located directly above the alignment mark 13. Furthermore, the dam 141 is formed into a closed loop, which helps prevent the material of the protective layer 142 from overflowing.

[0080] In one embodiment, Figure 5 As shown, the dam 141 includes a plurality of sub-dams 1411, which are arranged in a circular manner and spaced apart in sequence, that is, there is a gap between two adjacent sub-dams 1411. This helps to reduce the material used for the dam 141 and lower the production cost.

[0081] It should be noted that, in order to reduce the risk of overflow of the material of the protection layer 142 , the gap between two adjacent sub-dams 1411 may be made smaller.

[0082] It is understandable that the shapes of the sub-dams 1411 may be the same or different, and the embodiment of the present application does not specifically limit the shape of the sub-dams 1411 .

[0083] In one embodiment, Figure 4 The orthographic projection of the dam 141 on the substrate 11 is an open loop shape, with the two ends of the open loop being the starting end and the ending end, and an opening 141b between the starting end and the ending end. Here, the "open loop" shape can be understood as a ring shape with an opening 141b.

[0084] It should be noted that the opening 141b can be used as a directional overflow port. During the process of making the protective layer 142, the material of the protective layer 142 can overflow toward a specific area, so that the protective layer 142 can cover the area outside the accommodating space 141a, thereby achieving the purpose of expanding the coverage area of ​​the protective layer 142 and enabling the protective layer 142 to protect a larger area.

[0085] In one embodiment, Figure 3 As shown, the orthographic projection of the dam 141 on the substrate 11 is in the shape of a closed ring, which is helpful in preventing the material of the protective layer 142 from overflowing to the greatest extent.

[0086] Exemplarily, the closed ring may be a triangular ring, a circular ring, a rectangular ring, etc.

[0087] In one embodiment, the ratio of the thickness of the protective layer 142 within the accommodation space 141a to the thickness of the dam 141 is between 0.6 and 1. For example, the ratio of the thickness of the protective layer 142 within the accommodation space 141a to the thickness of the dam 141 can be 0.6, 0.7, 0.8, 0.9, 1, or any value in between. This allows the protective layer 142 to have a certain thickness, thereby providing better protective performance.

[0088] In one embodiment, the light transmittance of the protective layer 142 is greater than 30%, so that the alignment mark 13 can reflect light, thereby facilitating alignment and grasping.

[0089] In a preferred embodiment, the light transmittance of the protective layer 142 is greater than 90%, which is more conducive to the alignment mark 13 reflecting light, further reducing the difficulty of alignment and improving the alignment accuracy.

[0090] In one embodiment, the protective layer 142 is an inkjet-printed film layer, which, on the one hand, helps to reduce the difficulty of manufacturing the protective layer 142 and, on the other hand, helps to achieve higher pattern accuracy.

[0091] For example, the material of the inkjet-printed film layer can be a transparent conductive polymer, a photosensitive resin, polycarbonate, polyethylene terephthalate, an acrylic resin, a fluorinated / silicon-modified resin, a nanocomposite material, etc. Among them, the transparent conductive polymer can be poly (3,4-ethylenedioxythiophene):polystyrene sulfonate), the photosensitive resin material can be a UV-curable transparent resin, and the nanocomposite material can be a transparent conductive ink (silver nanowire / graphene dispersion).

[0092] In one embodiment, the material of the protective layer 142 includes acrylic acid, polyethylene terephthalate, polycarbonate, photosensitive resin, etc. In this way, the protective layer 142 can have insulating properties, which is beneficial for reducing the generation of static electricity.

[0093] In a preferred embodiment, the material of the protection layer 142 includes acrylic acid.

[0094] It's important to note that, on the one hand, acrylic materials offer high transparency (light transmittance exceeding 90%) and a refractive index close to that of glass (approximately 1.49), minimizing light scattering and reflection. Furthermore, acrylic materials cure quickly and are highly stable in high-temperature and high-humidity environments, resisting yellowing or delamination. Furthermore, through chemical modification (such as adjusting the monomer ratio and degree of cross-linking), acrylic materials can flexibly adjust parameters such as hardness, flexibility, and temperature resistance. Furthermore, acrylic materials can be processed through water-based or solvent-free processes, reducing VOC emissions. With a wide range of raw material sources, their overall cost is lower than alternative materials such as silicone and epoxy resins. Furthermore, modified acrylic materials (such as heat-resistant acrylic esters) maintain stable performance at high temperatures (150°C-200°C), preventing thermal deformation during panel manufacturing. Furthermore, by introducing elastic segments (such as polyurethane acrylates), acrylic materials can achieve high elasticity and low modulus, adapting to the repeated bending demands of foldable screens.

[0095] In one embodiment, the reflectivity of the protective layer 142 is lower than that of the alignment mark 13. It should be noted that during alignment, light reflected from the alignment mark 13 is captured for alignment. This arrangement reduces the reflectivity of the protective layer 142 during alignment, thereby minimizing the impact of the protective layer 142 on the reflected light signal from the alignment mark 13.

[0096] In one embodiment, the material of the protective layer 142 includes metal. This allows for a wider range of material options for the protective layer 142, facilitates utilizing existing film materials to manufacture the protective layer 142, and thus reduces manufacturing processes and reduces manufacturing costs.

[0097] In one embodiment, the orthographic projection of the alignment mark 13 on the substrate 11 is a cross or a V-shape. Of course, the orthographic projection of the alignment mark 13 on the substrate 11 can also be other shapes, which are not explained in detail in the embodiments of the present application.

[0098] In one embodiment, the material of the dam 141 includes organic material or metal. This can provide more choices for the material of the dam 141 and facilitate the use of materials in existing film layers to manufacture the dam 141, thereby reducing the manufacturing process and lowering the manufacturing cost.

[0099] In one embodiment, Figure 6 As shown, the display panel 10 further includes an array film layer 12, which includes multiple metal layers. The alignment mark 13 is provided in the same layer and material as one of the multiple metal layers. It should be noted that Figure 6 Only a portion of the array film layer 12 is shown, and the array film layer 12 is not shown in its entirety. Thus, in the subsequent film layer manufacturing process, the subsequent film layer can be aligned with the metal layer by grabbing the alignment mark 13 .

[0100] In one embodiment, referring to Figure 7 and Figure 8 As shown, the display panel 10 further includes an isolation structure 15 and multiple light-emitting devices 16. The isolation structure 15 is disposed on one side of the substrate 11 and encloses multiple isolation openings 15a. Multiple light-emitting devices 16 are disposed on one side of the substrate 11, corresponding to the isolation openings 15a. At least a portion of each light-emitting device 16 is disposed within the corresponding isolation opening 15a. The light-emitting devices 16 include a first electrode 161, a light-emitting portion 162, and a second electrode 163, stacked in a direction away from the substrate 11. The alignment mark 13 is provided on the same layer and made of the same material as the first electrode 161.

[0101] The first electrode 161 may be an anode, the second electrode 163 may be a cathode, and the light-emitting portion 162 includes at least a light-emitting layer (EML). In addition, the light-emitting portion 162 may include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole block layer (HBL), and an electron block layer (EBL). Alternatively, the light-emitting portion 162 may be a stacked light-emitting structure, that is, including at least two light-emitting layers and a charge generation layer (CGL) located between each adjacent light-emitting layer.

[0102] It is understandable that the alignment mark 13 and the first electrode 161 are provided in the same layer and the same material. In the process of manufacturing the subsequent film layer, the alignment of the subsequent film layer and the first electrode 161 can be achieved by grabbing the alignment mark 13 .

[0103] In one embodiment, the plurality of light emitting devices 16 include a first light emitting device, a second light emitting device, and a third light emitting device, and the first light emitting device, the second light emitting device, and the third light emitting device are respectively configured to emit light of different colors.

[0104] In one embodiment, the wavelength of light emitted by the first light emitting device is between 600 nm and 650 nm, the wavelength of light emitted by the second light emitting device is between 505 nm and 545 nm, and the wavelength of light emitted by the third light emitting device is between 440 nm and 480 nm.

[0105] In one embodiment, Figure 1As shown, the display panel 10 includes a display area 10a and a border area 10b surrounding the display area 10a. The light-emitting device 16 and the isolation opening 15a are located in the display area 10a, and the alignment mark 13 and the protective structure 14 are located in the border area 10b. It should be noted that the alignment mark 13 can be located at any position in the border area 10b, and the embodiment of the present application does not specifically limit the number and location of the alignment mark 13.

[0106] In one embodiment, the isolation structure 15 includes a conductive portion 151 and a blocking portion 152 stacked in a direction away from the substrate 11 , and the orthographic projection outer contour of the blocking portion 152 on the substrate 11 is located outside the orthographic projection outer contour of the conductive portion 151 on the substrate 11 .

[0107] In one embodiment, the second electrode 163 is electrically connected to the isolation structure 15 . In this way, the isolation structure 15 can serve as an auxiliary electrode to transmit power signals, which is beneficial for reducing the number of film layers in the display panel 10 .

[0108] In one embodiment, Figure 8 As shown, the dam 141 is made of the same material as the isolation structure 15. Thus, during the process of manufacturing the isolation structure 15, the dam 141 is manufactured simultaneously. Compared with the existing process, this process does not require any additional steps and only requires replacing one mask, which helps reduce manufacturing costs.

[0109] Specifically, the dam 141 also includes a conductive portion 151 and a blocking portion 152. The orthographic projection outer contour of the blocking portion 152 on the substrate 11 is located outside the orthographic projection outer contour of the conductive portion 151 on the substrate 11. In other words, the dam 141 also has an undercut structure.

[0110] In one embodiment, Figure 7 As shown, the bank 141 is made of an organic material. Thus, the bank 141 is an insulating structure, which is beneficial for reducing the metal content in the border area 10b, thereby reducing static electricity.

[0111] In one embodiment, the display panel 10 further includes a pixel defining layer 17, which encloses a plurality of pixel openings, each of which is in communication with the plurality of isolation openings 15a. The pixel defining layer 17 is located between the isolation structure 15 and the substrate 11, and between the protective structure 14 and the alignment mark 13. In other words, the pixel defining layer 17 located in the border region 10b covers the alignment mark 13. In this way, the pixel defining layer 17 can protect the alignment mark 13 and prevent damage to the alignment mark 13 caused by the etching solution.

[0112] In one embodiment, the alignment mark 13 is disposed in contact with the pixel defining layer 17 ; in other words, no other film layer is disposed between the alignment mark 13 and the pixel defining layer 17 .

[0113] In one embodiment, the protection structure 14 is disposed in contact with the pixel defining layer 17. In other words, no other film layer is disposed between the protection structure 14 and the pixel defining layer 17.

[0114] In one embodiment, the display panel 10 further includes a plurality of spaced-apart encapsulation portions 181, a first encapsulation layer 182, and a second encapsulation layer 183. The plurality of encapsulation portions 181 are arranged corresponding to the plurality of light-emitting devices 16, and the encapsulation portions 181 are arranged on the side of the corresponding light-emitting devices 16 facing away from the substrate 11. In one example, the encapsulation portions 181 are arranged in a one-to-one correspondence with the light-emitting devices 16. The first encapsulation layer 182 is arranged on the side of the plurality of encapsulation portions 181 facing away from the substrate 11. The second encapsulation layer 183 is arranged on the side of the first encapsulation layer 182 facing away from the substrate 11. Specifically, the first encapsulation layer 182 covers the exposed surfaces of the first encapsulation portion 181 and the isolation structure 15.

[0115] The above configuration is beneficial to improving the packaging performance of the display panel 10 and extending the display life.

[0116] In one embodiment, the first encapsulation layer 182 further covers the protection structure 14 ; in other words, the first encapsulation layer 182 is in direct contact with the protection structure 14 .

[0117] In one embodiment, the encapsulation portion 181 and the second encapsulation layer 183 are made of inorganic materials, and the first encapsulation layer 182 is made of organic materials.

[0118] In one embodiment, the display panel 10 includes a substrate 11, an isolation structure 15, a protective structure 14, an alignment mark 13, and a plurality of light-emitting devices 16. The alignment mark 13 and the isolation structure 15 are provided on one side of the substrate 11, and the isolation structure 15 encloses a plurality of isolation openings 15a. The plurality of light-emitting devices 16 are provided on one side of the substrate 11 and are arranged corresponding to the plurality of isolation openings 15a, with at least a portion of each light-emitting device 16 being provided within the corresponding isolation opening 15a. The light-emitting device 16 includes a first electrode 161, a light-emitting portion 162, and a second electrode 163 stacked in a direction away from the substrate 11; the alignment mark 13 and the first electrode 161 are provided in the same layer and material. The protective structure 14 is provided on one side of the substrate 11, with at least a portion of the protective structure 14 being located on the side of the alignment mark 13 facing away from the substrate 11, and the orthographic projection of the protective structure 14 on the substrate 11 covers the orthographic projection of the alignment mark 13 on the substrate 11.

[0119] The display panel 10 provided in the embodiment of the present application is provided with a protective structure 14. The protective structure 14 is located on the side of the alignment mark 13 facing away from the substrate 11, and the orthographic projection of the protective structure 14 covers the orthographic projection of the alignment mark 13. Thus, during the fabrication of the light-emitting device 16, the protective structure 14 protects the alignment mark 13, preventing damage to the alignment mark 13 by the etching solution, thereby ensuring the integrity of the alignment mark 13. This not only facilitates alignment in subsequent processes but also improves alignment accuracy, thereby increasing manufacturing yield and efficiency.

[0120] Specifically, the light-emitting material and the second electrode material of the first light-emitting device are first evaporated on the entire surface, and then the inorganic packaging material is made. Then, the light-emitting material, the second electrode material and the inorganic packaging material in the area to be removed are wet-removed. During this process, the protective structure 14 protects the alignment mark 13. Then, the light-emitting material and the second electrode material of the second light-emitting device are evaporated on the entire surface, and then the inorganic packaging material is made. Then, the light-emitting material, the second electrode material and the inorganic packaging material in the area to be removed are wet-removed. During this process, the protective structure 14 protects the alignment mark 13. Then, the light-emitting material and the second electrode material of the third light-emitting device are evaporated on the entire surface, and then the inorganic packaging material is made. Then, the light-emitting material, the second electrode material and the inorganic packaging material in the area to be removed are wet-removed. During this process, the protective structure 14 protects the alignment mark 13. In this way, the protective structure 14 can protect the alignment mark 13 during the three wet etching processes.

[0121] In one embodiment, the protective structure 14 includes a dam 141 and a protective layer 142. The dam 141 encloses a receiving space 141a, and at least a portion of the protective layer 142 is located within the receiving space 141a. The protective layer 142 is located on the side of the alignment mark 13 facing away from the substrate 11, and the orthographic projection of the protective layer 142 on the substrate 11 covers the orthographic projection of the alignment mark 13 on the substrate 11.

[0122] The protective structure 14 is formed by providing a dam 141 and a protective layer 142. The dam 141 encloses a receiving space 141a for providing the protective layer 142. In some embodiments, the protective layer 142 is made of an organic material. The dam 141 facilitates the aggregation and solidification of the organic material to form the protective layer 142, thereby preventing the organic material from overflowing into other areas.

[0123] In one embodiment, the display panel 10 further includes a pixel-defining layer 17. The pixel-defining layer 17 encloses a plurality of pixel openings, which are connected to the plurality of isolation openings 15a. The pixel-defining layer 17 is located between the isolation structure 15 and the substrate 11, and between the protective structure 14 and the alignment mark 13.

[0124] In one embodiment, the alignment mark 13 is disposed in contact with the pixel defining layer 17 .

[0125] In one embodiment, the protection structure 14 is disposed in contact with the pixel defining layer 17 .

[0126] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel in any of the above embodiments.

[0127] The display device can be a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a television monitor, a flat-panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, etc.

[0128] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0129] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0130] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; an alignment mark, provided on one side of the substrate; a protective structure disposed on one side of the substrate, the protective structure comprising a dam and a protective layer, the dam enclosing a receiving space, and the protective layer being located within the receiving space; The protective layer is located on a side of the alignment mark facing away from the substrate, and the orthographic projection of the protective layer on the substrate covers the orthographic projection of the alignment mark on the substrate; The dam includes a plurality of sub-dams, which are arranged in a ring shape and spaced apart in sequence; or, the orthographic projection shape of the dam on the substrate is an open loop shape, the annular ends of the open loop shape are a starting end and an ending end respectively, and there is an opening between the starting end and the ending end; or, the orthographic projection shape of the dam on the substrate is a closed loop shape.

2. The display panel according to claim 1, wherein: The orthographic projection of the dam on the substrate surrounds at least a portion of an outer periphery of the orthographic projection of the alignment mark on the substrate.

3. The display panel according to claim 2, wherein: The orthographic projection of the dam on the substrate surrounds the entire periphery of the orthographic projection of the alignment mark on the substrate.

4. The display panel according to claim 1, wherein: The ratio of the thickness of the protective layer in the accommodation space to the thickness of the dam is between 0.6 and 1; And / or, the light transmittance of the protective layer is greater than 30%.

5. The display panel according to claim 1, wherein: The protective layer is an inkjet printed film layer; The material of the protective layer includes acrylic acid, polyethylene terephthalate, polycarbonate, and photosensitive resin; The material of the dam includes organic material or metal.

6. The display panel according to claim 1, wherein: The light reflectivity of the protective layer is lower than the light reflectivity of the alignment mark.

7. The display panel according to any one of claims 1 to 6, characterized in that: The display panel further includes: An isolation structure is provided on one side of the substrate, and the isolation structure encloses and forms a plurality of isolation openings; A plurality of light-emitting devices are provided on one side of the substrate and are arranged corresponding to the plurality of isolation openings, with at least a portion of each light-emitting device being arranged within the corresponding isolation opening; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked in a direction away from the substrate; the second electrode is electrically connected to the isolation structure; The alignment mark and the first electrode are provided in the same layer and made of the same material.

8. The display panel according to claim 7, wherein: The display panel has a display area and a frame area surrounding the display area. The light emitting device and the isolation opening are located in the display area. The alignment mark and the protection structure are located in the frame area.

9. The display panel according to claim 7, wherein: The dam and the isolation structure are provided in the same layer and made of the same material.

10. The display panel according to claim 7, wherein: The display panel further includes a pixel defining layer, wherein the pixel defining layer encloses a plurality of pixel openings, and the plurality of pixel openings are correspondingly connected to the plurality of isolation openings; The pixel defining layer is located between the isolation structure and the substrate, and between the protection structure and the alignment mark.

11. The display panel according to claim 10, wherein: The alignment mark is disposed in contact with the pixel defining layer; and / or the protection structure is disposed in contact with the pixel defining layer.

12. The display panel according to claim 7, wherein: The display panel further includes: a plurality of packaging parts arranged at intervals, arranged corresponding to the plurality of light-emitting devices, the packaging parts being arranged on a side of the corresponding light-emitting device away from the substrate; A first packaging layer is provided on a side of the plurality of packaging portions away from the substrate; The second packaging layer is arranged on a side of the first packaging layer away from the substrate.

13. The display panel according to claim 12, wherein: The first encapsulation layer also covers the protection structure.

14. The display panel according to any one of claims 1 to 6, characterized in that: The display panel further includes an array film layer, the array film layer includes multiple metal layers, and the alignment mark is provided in the same layer and the same material as one metal layer in the multiple metal layers; The display panel has a display area and a border area arranged around the display area. The display panel also includes a plurality of light-emitting devices, which are arranged on a side of the array film layer away from the substrate and are located in the display area. The alignment mark and the protective structure are located in the border area.

15. A display panel, characterized in that: include: substrate; an alignment mark, provided on one side of the substrate; An isolation structure is provided on one side of the substrate, and the isolation structure encloses and forms a plurality of isolation openings; A plurality of light-emitting devices are provided on one side of the substrate and are arranged corresponding to the plurality of isolation openings, with at least a portion of each light-emitting device being arranged within the corresponding isolation opening; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked in a direction away from the substrate; the alignment mark is provided in the same layer and material as the first electrode; A protective structure is provided on one side of the substrate, at least a portion of the protective structure is located on a side of the alignment mark facing away from the substrate, and an orthographic projection of the protective structure on the substrate covers an orthographic projection of the alignment mark on the substrate; the protective structure includes a dam and a protective layer, the dam is arranged to form an accommodating space, and the protective layer is located within the accommodating space; wherein the protective layer is located on a side of the alignment mark facing away from the substrate, and an orthographic projection of the protective layer on the substrate covers an orthographic projection of the alignment mark on the substrate; The dam includes a plurality of sub-dams, which are arranged in a ring shape and spaced apart in sequence; or, the orthographic projection shape of the dam on the substrate is an open loop shape, the annular ends of the open loop shape are a starting end and an ending end respectively, and there is an opening between the starting end and the ending end; or, the orthographic projection shape of the dam on the substrate is a closed loop shape.

16. The display panel according to claim 15, wherein: The display panel further includes a pixel defining layer, wherein the pixel defining layer encloses a plurality of pixel openings, and the plurality of pixel openings are correspondingly connected to the plurality of isolation openings; The pixel defining layer is located between the isolation structure and the substrate, and between the protection structure and the alignment mark.

17. The display panel according to claim 16, wherein: The alignment mark is disposed in contact with the pixel defining layer; and / or the protection structure is disposed in contact with the pixel defining layer.

18. A display device, characterized in that: Comprising the display panel according to any one of claims 1 to 17.

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