Display panel, display device and preparation method of display panel

Abstract

The embodiment of the invention provides a display panel, a display device and a preparation method of the display panel, the display panel comprises a substrate, a dam structure, a pixel definition layer, a light emitting device layer and a protection piece, the dam structure is arranged on one side of the substrate, and the dam structure comprises a first dam located in a non-display area; the pixel definition layer comprises a pixel opening located in the display area and a first opening located in the non-display area, and the orthographic projection of the first opening on the substrate is at least partially overlapped with the orthographic projection of the first dam on the substrate; the light-emitting device layer comprises a plurality of light-emitting units located in the display area. The protection part is located on the side, away from the substrate, of the first dam and located on the side, facing the substrate, of the pixel defining layer, and the orthographic projection of the protection part on the substrate and the orthographic projection of the first opening on the substrate are at least partially overlapped. According to the dam structure, collapse of the dam structure is reduced or avoided through the protection part.

Description

TECHNICAL FIELD

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

[0002] Organic light emitting diodes (OLED) and display panels based on light emitting diode (LED) technology have been widely used in mobile phones, televisions, notebook computers, desktop computers and other consumer electronic products due to their high image quality, power saving, thin body and wide application range. However, the existing display panel still needs to be improved. SUMMARY

[0003] Embodiments of the present application provide a display panel, a display device and a preparation method of the display panel, aiming to optimize the technical problem that the dam structure is easily damaged in the preparation process of the display panel.

[0004] Embodiments of the first aspect of the present application provide a display panel, the display panel having a display area and a non-display area, the non-display area being arranged around at least part of the display area; the display panel comprising:

[0005] a substrate;

[0006] a dam structure arranged on one side of the substrate, the dam structure comprising a first dam located in the non-display area;

[0007] a pixel definition layer arranged on a side of the dam structure away from the substrate, the pixel definition layer comprising a pixel opening located in the display area and a first opening located in the non-display area, the first opening at least partially overlapping the first dam in the orthographic projection of the substrate;

[0008] a light emitting device layer comprising a plurality of light emitting units located in the display area, at least part of the light emitting units being arranged in the pixel opening;

[0009] a protection member located on a side of the first dam away from the substrate and on a side of the pixel definition layer facing the substrate, the protection member at least partially overlapping the first opening in the orthographic projection of the substrate.

[0010] According to any one of the preceding embodiments of the first aspect of the present application, the protection member comprises an inorganic material.

[0011] According to any one of the preceding embodiments of the first aspect of the present application, the light emitting unit comprises a first electrode and a light emitting part, the first electrode being arranged on a side of the light emitting part close to the substrate, and the protection member being arranged in the same layer as the first electrode.

[0012] According to any one of the preceding embodiments of the first aspect of the application, the first dam comprises an organic material.

[0013] According to any one of the preceding embodiments of the first aspect of the application, the protection member comprises a first surface and a second surface arranged opposite to each other, and a side surface connected to the first surface, the first surface is arranged on a side of the second surface away from the substrate, and the pixel definition layer covers at least part of the side surface.

[0014] According to any one of the preceding embodiments of the first aspect of the application, the pixel definition layer extends along a surface of the first dam away from the substrate to the first surface.

[0015] According to any one of the preceding embodiments of the first aspect of the application, the display panel further comprises a first encapsulation layer, the first encapsulation layer is located on a side of the light-emitting device layer away from the substrate, a projection of the first encapsulation layer on the substrate covers a projection of the dam structure on the substrate, and the protection member is arranged between the first dam and the first encapsulation layer.

[0016] According to any one of the preceding embodiments of the first aspect of the application, the first encapsulation layer comprises a first sub-part and a second sub-part connected to each other, the first sub-part is located in the display area, and the second sub-part is located in the non-display area, the second sub-part is in contact with a surface of the pixel definition layer away from the substrate and extends along the pixel definition layer to the first opening.

[0017] According to any one of the preceding embodiments of the first aspect of the application, the second sub-part located in the first opening is in contact with a surface of the protection member away from the substrate.

[0018] According to any one of the preceding embodiments of the first aspect of the application, the display panel further comprises a second encapsulation layer, the second encapsulation layer is at least partially arranged in the display area, the second encapsulation layer is arranged between the light-emitting device layer and the first encapsulation layer, and the first dam is located on a side of the second encapsulation layer close to the non-display area.

[0019] According to any one of the preceding embodiments of the first aspect of the application, an edge of the second encapsulation layer close to the non-display area is overlapped with a projection of the first dam on the substrate, the pixel definition layer comprises a raised portion in contact with a surface of the first dam away from the substrate, the edge of the second encapsulation layer close to the non-display area is located on a side of the raised portion away from the substrate, and the edge of the second encapsulation layer close to the non-display area is located on a side of the first dam away from the substrate.

[0020] According to any one of the preceding embodiments of the first aspect of the application, the first encapsulation layer is an inorganic material layer, and the second encapsulation layer is an organic material layer.

[0021] According to any one of the preceding embodiments of the first aspect of the application, the display panel further comprises a third encapsulation layer, the third encapsulation layer is located between the light-emitting device layer and the second encapsulation layer, and the third encapsulation layer comprises a plurality of encapsulation portions arranged at intervals, a projection of the encapsulation portion on the substrate is overlapped with a projection of the light-emitting unit on the substrate.

[0022] According to any of the foregoing embodiments of the first aspect of this application, the third encapsulation layer is an inorganic material layer.

[0023] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the first dam on the substrate.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the number of first openings is multiple, a first dam is arranged around the display area, and multiple first openings are arranged at intervals around the display area.

[0025] According to any of the foregoing embodiments of the first aspect of this application, the number of protective members is multiple, and the multiple protective members are provided in a one-to-one correspondence with the first opening.

[0026] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the protective member on the substrate is located within the orthographic projection of the first dam on the substrate.

[0027] According to any of the foregoing embodiments of the first aspect of this application, the dam structure further includes a second dam located in the non-display area, the second dam being spaced apart from the first dam, and the second dam being located on the side of the first dam away from the display area.

[0028] According to any of the foregoing embodiments of the first aspect of this application, the substrate includes a first conductive layer, a pixel definition layer is located on the side of the first conductive layer away from the substrate, and a first dam is located between the pixel definition layer and the first conductive layer.

[0029] According to any of the foregoing embodiments of the first aspect of this application, a second opening is formed by the first dam and the second dam spaced apart, and a pixel definition layer extends into the second opening and contacts the first conductive layer.

[0030] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the pixel definition layer on the substrate covers the orthographic projection of the second dam on the substrate.

[0031] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes an isolation structure located on the side of the pixel definition layer away from the substrate. The isolation structure has a plurality of isolation openings that communicate with the pixel openings, and at least a portion of the light-emitting unit is located within the isolation openings.

[0032] According to any of the foregoing embodiments of the first aspect of this application, the isolation structure includes a first isolation layer and a second isolation layer stacked together, the first isolation layer being disposed on the side of the second isolation layer close to the substrate, and the orthographic projection of the first isolation layer on the substrate being located within the orthographic projection of the second isolation layer on the substrate.

[0033] According to any of the foregoing embodiments of the first aspect of this application, in the display area, the surface of the second isolation layer facing away from the substrate has a smaller projected area on the substrate than the surface of the second isolation layer facing towards the substrate.

[0034] According to any of the foregoing embodiments of the first aspect of this application, in the display area, the surface of the first isolation layer facing away from the substrate has a smaller projected area on the substrate than the surface of the second isolation layer facing towards the substrate.

[0035] According to any of the foregoing embodiments of the first aspect of this application, the light-emitting unit includes a first electrode, a light-emitting portion, and a second electrode stacked sequentially along a direction away from the substrate, wherein the second electrode overlaps with an isolation structure.

[0036] According to any of the foregoing embodiments of the first aspect of this application, a portion of the pixel definition layer is located between adjacent first electrodes.

[0037] A second aspect of this application also provides a display panel having a display area and a non-display area, the non-display area being at least partially disposed around the display area; the display panel includes:

[0038] substrate;

[0039] A dam structure is disposed on one side of the substrate, and the dam structure includes a first dam located in the non-display area;

[0040] An inorganic layer is disposed on the side of the dam structure away from the substrate. The inorganic layer includes a pixel opening in the display area and a first opening in the non-display area. The orthographic projection of the first opening on the substrate and the orthographic projection of the first dam on the substrate at least partially overlap.

[0041] The light-emitting device layer includes multiple light-emitting units located in the display area, and the light-emitting units are disposed within the pixel openings;

[0042] The first encapsulation layer is located on the side of the light-emitting device layer away from the substrate, and a portion of the first encapsulation layer is located within the first opening;

[0043] The second encapsulation layer is at least partially disposed in the display area. The second encapsulation layer is disposed between the light-emitting device layer and the first encapsulation layer. The first dam is located on the side of the second encapsulation layer closer to the non-display area.

[0044] The protective element is located in the non-display area. The orthographic projection of the protective element on the substrate at least partially overlaps with the orthographic projection of the first opening on the substrate. The protective element is disposed between the first dam and the inorganic layer.

[0045] According to any of the foregoing embodiments of the second aspect of this application, the inorganic layer is a pixel definition layer; the inorganic layer further includes a pixel opening located in the display area, and at least a portion of the light-emitting unit is disposed within the pixel opening.

[0046] According to any of the foregoing embodiments of the second aspect of this application, the light-emitting unit includes a first electrode and a light-emitting part, the first electrode is disposed on the side of the light-emitting part close to the substrate, and the protective member is disposed in the same layer as the first electrode.

[0047] An embodiment of the third aspect of this application also provides a method for manufacturing a display panel, the display panel having a display area and a non-display area, the non-display area being at least partially disposed around the display area; the manufacturing method includes:

[0048] A substrate is provided, and a dam structure is disposed on the substrate, the dam structure including a first dam located in a non-display area;

[0049] A protective element is installed on the first dam, and multiple first electrodes located in the display area are installed on one side of the substrate;

[0050] A pixel definition material layer and an isolation material layer are sequentially disposed on the substrate, with the pixel definition material layer covering the first electrode, the protective component, and the first dam.

[0051] The isolation material layer and the pixel definition material layer are patterned to obtain the isolation structure and the pixel definition layer. The pixel definition layer includes a pixel opening located in the display area and a first opening located in the non-display area. The orthographic projection of the first opening onto the substrate and the orthographic projection of the first dam onto the substrate at least partially overlap. The first electrode is exposed from the pixel opening.

[0052] According to any of the foregoing embodiments of the third aspect of this application, the preparation method further includes:

[0053] A light-emitting device layer is formed on one side of the substrate. The light-emitting device layer includes a plurality of light-emitting units located in the display area. The light-emitting units are disposed within the pixel opening.

[0054] A first encapsulation layer is formed on the side of the light-emitting device layer away from the substrate. The first encapsulation layer covers the orthogonal projection of the dam structure onto the orthogonal projection of the substrate. A protective element is disposed between the first dam and the first encapsulation layer.

[0055] According to any of the foregoing embodiments of the third aspect of this application, a protective member is provided on the first dam, and a plurality of first electrodes located in the display area are provided on one side of the substrate, including:

[0056] A first electrode material is disposed on one side of the substrate, and the first electrode material covers the first dam;

[0057] The first electrode material is patterned to obtain the protective component and the first electrode.

[0058] An embodiment of the fourth aspect of this application also provides a display device, including a display panel of any of the embodiments of the first and second aspects described above, or a display panel prepared of any of the embodiments of the third aspect described above.

[0059] In the display panel provided in this application, by setting a first opening in the pixel definition layer, some fluid material can be intercepted at the first opening during the fabrication of the display panel, thus avoiding or reducing the overflow of fluid material from the display area to the side of the first dam away from the display area; by setting the orthographic projection of the protective member on the substrate to at least partially overlap with the orthographic projection of the first opening on the substrate, the first dam is avoided or reduced from being exposed through the first opening during the fabrication process, thus avoiding or reducing damage to the first dam exposed through the first opening during the fabrication of the display panel, thereby enabling the functional layer on the side of the protective member away from the substrate to be continuously filmed at the first opening, thereby improving the quality of the display panel. Attached Figure Description

[0060] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application 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.

[0061] Figure 1 This is a schematic diagram of the planar structure of a display panel provided in some embodiments of this application;

[0062] Figure 2 This is a partial cross-sectional structural diagram of a display panel provided in some embodiments of this application;

[0063] Figure 3 This is a partial cross-sectional structural diagram of a display panel provided in some embodiments of this application;

[0064] Figure 4 This is a partial planar structural schematic diagram of a display panel provided in some embodiments of this application;

[0065] Figure 5 This is a schematic diagram of the planar structure of a display panel provided in some embodiments of this application;

[0066] Figure 6 This is a partial cross-sectional structural diagram of a display panel provided in some embodiments of this application;

[0067] Figure 7 This is a partial cross-sectional structural diagram of a display panel provided in some embodiments of this application.

[0068] Explanation of reference numerals in the attached figures:

[0069] 100. Display panel; AA. Display area; NA. Non-display area;

[0070] 1. Substrate; 11. Substrate; 12. Driving circuit layer; 13. Transistor; 131. Source; 132. Drain; 133. Gate; 134. Active layer; 135. First electrode plate; 136. Second electrode plate; 14. First conductive layer;

[0071] 2. Isolation structure; 21. First isolation layer; 22. Second isolation layer; 23. Isolation opening; 24. Third isolation layer;

[0072] 30. Protective component; 301. First surface; 302. First surface; 303. Side surface;

[0073] 3. Light-emitting unit; 31. First electrode; 32. Light-emitting part; 33. Second electrode;

[0074] 4. Pixel definition layer; 41. Pixel opening; 42. First opening; 43. Second opening; 44. Elevation section;

[0075] 5. Dam structure; 51. First dam; 52. Second dam;

[0076] 61. First encapsulation layer; 611. First section; 612. Second section; 62. Second encapsulation layer; 63. Third encapsulation layer; 631. Encapsulation section;

[0077] X, the first direction. Detailed Implementation

[0078] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0080] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0081] During the fabrication of the display panel, the dam structure releases moisture through a first opening in the pixel definition layer. In subsequent processes, the dam structure exposed through the first opening is easily damaged, resulting in partial loss of the dam structure. Other functional layers fabricated on the dam structure are prone to collapse at the missing points, leading to poor display panel functionality.

[0082] To address the aforementioned issues, this application provides a display panel, a display device, and a method for manufacturing the display panel. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel, display device, and method for manufacturing the display panel.

[0083] like Figure 1 and Figure 2As shown, the first aspect of this application provides a display panel 100, which has a display area AA and a non-display area NA, with the non-display area NA disposed around at least a portion of the display area AA. The display panel 100 includes: a substrate 1, a dam structure 5, a pixel definition layer 4, a light-emitting device layer, and a protective member 30. The dam structure 5 is disposed on one side of the substrate 1 and includes a first dam 51 located in the non-display area NA. The pixel definition layer 4 is disposed on the side of the dam structure 5 away from the substrate 1 and includes a pixel opening 41 located in the display area AA and a first opening 42 located in the non-display area NA. The orthographic projection of the first opening 42 onto the substrate 1 at least partially overlaps with the orthographic projection of the first dam 51 onto the substrate 1. The light-emitting device layer includes a plurality of light-emitting units 3 located in the display area AA and the light-emitting units 3 disposed within the pixel opening 41. The protective member 30 is located on the side of the first dam 51 away from the substrate 1 and on the side of the pixel definition layer 4 facing the substrate 1. The orthographic projection of the protective member 30 onto the substrate 1 at least partially overlaps with the orthographic projection of the first opening 42 onto the substrate 1.

[0084] In the display panel 100 provided in this embodiment, the display panel 100 can be a display panel based on Organic Light Emitting Diode (OLED) technology. Multiple light-emitting units 3 are disposed in the display area AA, enabling the display area AA to emit light and display. The non-display area NA is not used for display and light emission, and no light-emitting units 3 are disposed in the non-display area NA. The signal lines used for electrically connecting the light-emitting units 3 can be distributed in the non-display area NA to reduce the space occupied by these signal lines in the display area AA, which is beneficial to increasing the distribution density of the light-emitting units 3 in the display area AA.

[0085] In the display panel 100 provided in this embodiment, the substrate 1 not only provides support for the isolation structure 2, but also provides electrical signals for the light-emitting device layer. The substrate 1 includes a substrate 11 and a driving circuit layer 12, which is disposed between the substrate 11 and the light-emitting device layer. The driving circuit layer 12 may include a pixel driving circuit. For example, the pixel driving circuit disposed on the driving circuit layer 12 includes a transistor 13 and a storage capacitor. The transistor 13 includes an active layer 134, a gate 133, a drain 132, and a source 131. The storage capacitor includes a first electrode 135 and a second electrode 136. A plurality of patterned conductive layers form the aforementioned transistor 13 and storage capacitor.

[0086] The pixel definition layer 4 encloses and forms a pixel opening 41 and a first opening 42. The pixel opening 41 defines the position, shape, and size of the light-emitting unit 3. The multiple light-emitting units 3 can be light-emitting units 3 capable of emitting different colors of light. For example, they can be red light-emitting units capable of emitting red light, green light-emitting units capable of emitting green light, and blue light-emitting units capable of emitting blue light. The first opening 42 is located in the non-display area NA. During the fabrication of the display panel 100, some processes involve fluid materials. The first opening 42 can contain the fluid material overflowing from the display area NA, preventing further outward overflow of the fluid material.

[0087] During the fabrication of the display panel 100, the first dam 51 and the protective element 30 can be fabricated first, followed by the pixel definition layer 4. Before fabricating the pixel definition layer 4, the first dam 51 is placed in a high-temperature environment. Moisture inside the first dam 51 can be discharged outward through the area not covered by the protective element 30, thus keeping the first dam 51 dry before fabricating the pixel definition layer 4. During the fabrication of the display panel 100, the first opening 42 can also effectively contain some of the fabrication material overflowing from the display area AA to the non-display area NA, thereby preventing further overflow of the fabrication material.

[0088] The orthographic projection of the protective member 30 onto the substrate 1 at least partially overlaps with the orthographic projection of the first opening 42 onto the substrate 1. The protective member 30 is disposed on the first dam 51, such that the protective member 30 can cover at least a portion of the first dam 51, preventing or reducing the exposure of the first dam 51 from the first opening 42. This prevents or reduces damage to the first dam 51 by some processes in the fabrication of the display panel 100 through the first opening 42, and prevents or reduces the collapse of the first dam 51 leading to uneven film formation of the functional layer on the side of the first dam 51 facing away from the substrate 1. Unless otherwise specified, the orthographic projection on the substrate 1 in this application is a projection along the first direction X. The first direction X can be the thickness direction of the display panel 100 or a direction perpendicular to the substrate 1.

[0089] In the display panel 100 provided in this application, by providing a first opening 42 in the pixel definition layer 4, some fluid material can be intercepted at the first opening 42 during the fabrication of the display panel 100, thus avoiding or reducing the overflow of fluid material from the display area AA to the side of the first dam 51 away from the display area AA; by providing that the orthographic projection of the protective member 30 on the substrate 1 at least partially overlaps with the orthographic projection of the first opening 42 on the substrate 1, the exposure of the first dam 51 through the first opening 42 during the fabrication process is avoided or reduced, thus avoiding or reducing damage to the first dam 51 exposed from the first opening 42 during the fabrication of the display panel 100, thereby enabling the functional layer on the side of the protective member 30 away from the substrate to be continuously filmed at the first opening 42, thereby improving the quality of the display panel 100.

[0090] In some embodiments, the protective element 30 comprises an inorganic material.

[0091] Compared to organic materials, inorganic materials have better density, which helps the protective component 30 block moisture and prevents the preparations used in the manufacturing process of the display panel 100 from damaging the first dam 51 through the protective component 30.

[0092] In other embodiments, the protective element 30 is a conductive element, and the protective element 30 has the function of preventing signals. For example, the protective element 30 can shield the mutual interference between the touch layer located on its side away from the substrate 11 and the drive circuit layer 12 located on its side close to the substrate 11.

[0093] Please refer to the following: Figure 3 and Figure 4 In some embodiments, the light-emitting unit 3 includes a first electrode 31 and a light-emitting part 32. The first electrode 31 is disposed on the side of the light-emitting part 32 close to the substrate 1, and the protective member 30 is disposed in the same layer as the first electrode 31.

[0094] The electrode material for fabricating the first electrode 31 can be laid on one side of the substrate 1, and the electrode material can be patterned to form multiple first electrodes 31 and protective elements 30. By setting the protective elements 30 in the same layer as the first electrodes 31, the step of fabricating the protective elements 30 separately is eliminated, simplifying the fabrication process.

[0095] In some embodiments, the first dam 51 comprises organic material.

[0096] The first dam 51 is made of organic materials, which simplifies the fabrication of the first dam 51 to the required thickness. Because the first dam 51 is made of organic materials, during the fabrication of the display panel 100, when using a dry etching process to pattern the pixel definition layer 4, the first dam 51 exposed from the first opening 42 is easily damaged. Therefore, a protective element 30 is provided to prevent damage to the first dam 51 during the dry etching process.

[0097] In some embodiments, the protective member 30 includes a first surface 301 and a second surface 302 disposed opposite to each other, and a side surface 303 connected to the first surface 301. The first surface 301 is disposed on the side of the second surface 302 away from the substrate 1, and the pixel definition layer 4 covers at least part of the side surface 303.

[0098] The protective element 30 can be prepared first, and then the pixel definition layer 4 with the first opening 42 can be prepared. The pixel definition layer 4 can cover part of the protective element 30. For example, the pixel definition layer 4 can cover at least part of the side 303 to reduce the contact of the side 303 with the preparation agent in subsequent processes, and avoid or reduce the damage of the preparation agent to the side 303.

[0099] In some embodiments, the pixel definition layer 4 extends along the surface of the first dam 51 away from the substrate 1 to the first surface 301.

[0100] The pixel definition layer 4 can extend from the side 303 to the edge of the first surface 301, thereby ensuring that the pixel definition layer 4 effectively covers the side 303.

[0101] In some embodiments, the display panel 100 further includes a first encapsulation layer 61, which is located on the side of the light-emitting device layer away from the substrate 1. The orthographic projection of the first encapsulation layer 61 onto the substrate 1 covers the orthographic projection of the dam structure 5 onto the substrate 1. The protective member 30 is disposed between the first dam 51 and the first encapsulation layer 61.

[0102] The first encapsulation layer 61 can be made of organic and / or inorganic materials. The first encapsulation layer 61 helps improve the water and oxygen isolation capability of the light-emitting device layer. The first encapsulation layer 61 can extend from the display area AA to the non-display area NA and is located on the side of the light-emitting device layer facing away from the substrate 1, thereby achieving full-area encapsulation of the display area AA and the non-display area NA. The first encapsulation layer 61 located in the display area AA can encapsulate the side of the light-emitting device layer and the isolation structure 2 facing away from the substrate 1, preventing external water and oxygen from entering the light-emitting unit 3 from the side of the light-emitting device layer and the isolation structure 2 facing away from the substrate 1, thus affecting the display and light emission of the light-emitting unit 3. The first encapsulation layer 61 located in the non-display area NA is stacked on the side of the pixel definition layer 4 facing away from the substrate 1, preventing external water and oxygen from entering the display area AA from the non-display area NA, thus affecting the display and light emission of the light-emitting unit 3. The protective element 30 is provided to prevent or reduce the first dam 51 from being exposed through the first opening 42 during the manufacturing process, thereby preventing or reducing damage to the first dam 51 exposed through the first opening 42 during the manufacturing process of the display panel 100, so that the first encapsulation layer 61 can be continuously formed at the first opening 42, thereby improving the encapsulation performance of the first encapsulation layer 61.

[0103] In some embodiments, the first encapsulation layer 61 includes a first portion 611 and a second portion 612 connected to each other. The first portion 611 is located in the display area AA, and the second portion 612 is located in the non-display area NA. The second portion 612 contacts the surface of the pixel definition layer 4 away from the substrate 1 and extends along the pixel definition layer 4 into the first opening 42.

[0104] The encapsulation material used to prepare the first encapsulation layer 61 is partially located in the display area AA, forming a first portion 611, and partially located in the non-display area NA, forming a second portion 612. The second portion 612 extends along the pixel definition layer 4 into the first opening 42, so that the pixel definition layer 4 can protect a portion of the first dam 51 from damage during the preparation of the display panel 100.

[0105] In some embodiments, the second portion 612 located within the first opening 42 contacts the surface of the protective member 30 away from the substrate 1.

[0106] The first dam 51, the protective component 30, and the second section 612 are supported in sequence, so that the second section 612 can be continuously distributed at the first opening 42, thus avoiding the second section 612 from breaking at the first opening 42 and causing the encapsulation to fail.

[0107] In some embodiments, the display panel 100 further includes a second encapsulation layer 62, which is at least partially disposed in the display area AA. The second encapsulation layer 62 is disposed between the light-emitting device layer and the first encapsulation layer 61, and the first dam 51 is located on the side of the second encapsulation layer 62 closer to the non-display area.

[0108] The first encapsulation layer 61 and the second encapsulation layer 62 can be made of materials with different physical and chemical properties, thereby improving the encapsulation performance of the display panel 100. The first dam 51 is located on the side of the second encapsulation layer 62 closer to the non-display area NA, that is, the first dam 51 can prevent the second encapsulation layer 62 from extending along the display area to the non-display area NA, and the first dam 51 can prevent water vapor from entering the display area AA from the non-display area NA.

[0109] In some embodiments, the orthographic projection of the edge of the second encapsulation layer 62 near the non-display area NA on the substrate 1 overlaps with the orthographic projection of the first dam 51 on the substrate. The pixel definition layer 4 includes a raised portion 44 that contacts the surface of the first dam 51 away from the substrate 1. The edge of the second encapsulation layer 62 near the non-display area NA is located on the side of the raised portion 44 away from the substrate 1.

[0110] The first dam 51, the raised portion 44, and the second encapsulation layer 62 can be formed sequentially and stacked together. The raised portion 44 helps to increase the total height of the stacked first dam 51 and raised portion 44. The encapsulation material used to form the second encapsulation layer 62 can be coated on one side of the substrate 1. The first dam 51 blocks the flow of the encapsulation material, so that the edge of the second encapsulation layer 62 near the non-display area NA is located on the side of the first dam 51 away from the substrate 1. The distance from the surface of the second encapsulation layer 62 away from the substrate 1 to the substrate 1 can be greater than the distance from the surface of the raised portion 44 away from the substrate 1 to the substrate 1. When preparing the second encapsulation layer 62, the encapsulation material used to prepare the second encapsulation layer 62 can be piled up in the display area AA. The first dam 51 and the raised portion 44 block part of the encapsulation material from flowing into the non-display area NA, and part of the encapsulation material overflows to the side of the raised portion 44 away from the substrate 1, so that the edge of the second encapsulation layer 62 near the non-display area NA is located on the side of the raised portion 44 away from the substrate 1.

[0111] In some embodiments, the first encapsulation layer 61 is an inorganic material layer, and the second encapsulation layer 62 is an organic material layer.

[0112] Compared to inorganic materials, organic materials have better flexibility, enabling the second encapsulation layer 62 to achieve planarization. Compared to organic material layers, inorganic material layers have better water and oxygen barrier capabilities. By encapsulating the light-emitting device layer together with both organic and inorganic material layers, the overall water and oxygen resistance of the display panel 100 is improved.

[0113] During the fabrication of the second encapsulation layer 62, by setting a first opening 42 in the pixel definition layer 4, when the encapsulation material for fabricating the second encapsulation layer 62 overflows to the first dam 51, the encapsulation material can be intercepted at the first opening 42, thereby preventing or reducing the overflow of the encapsulation material from the display area AA to the side of the first dam 51 away from the display area AA.

[0114] In some embodiments, the display panel 100 further includes a third encapsulation layer 63, which is located between the light-emitting device layer and the second encapsulation layer 62. The third encapsulation layer 63 includes a plurality of encapsulation portions 631 spaced apart, and the orthographic projection of the encapsulation portion 631 on the substrate 1 overlaps with the orthographic projection of the light-emitting unit 3 on the substrate 1.

[0115] The third encapsulation layer 63 is disposed on the display area AA. The third encapsulation layer 63 can be made of inorganic materials. The second encapsulation layer 62 and the third encapsulation layer 63 are made of different materials, so that the second encapsulation layer 62 and the third encapsulation layer 63 can have different properties to improve the water and oxygen resistance of the display panel 100. The encapsulation part 631 and the light-emitting unit 3 can be arranged in a one-to-one correspondence, that is, one encapsulation part 631 is used to encapsulate one light-emitting unit 3.

[0116] In some embodiments, the orthographic projection of the first opening 42 on the substrate 1 is located within the orthographic projection of the first dam 51 on the substrate 1, so as to reduce the size of the first opening 42 relative to the first dam 51.

[0117] Please see Figure 5 In some embodiments, there are multiple first openings 42, a first dam 51 is arranged around the display area AA, and multiple first openings 42 are arranged at intervals around the display area AA.

[0118] Multiple first openings 42 are provided to help prevent the fabrication material from overflowing from the display area AA to the non-display area NA. The first encapsulation layer 61, partially located within the first opening 42, undergoes multiple bends at the opening 42, which reduces or prevents cracks in the first encapsulation layer 61 from extending from one side of the first opening 42 to the other, thus improving the encapsulation performance of the first encapsulation layer 61. A first dam 51 is provided around the display area AA so that the periphery of the display area AA is blocked from the entry of water and oxygen.

[0119] In some embodiments, there are multiple protective elements 30, and each of the multiple protective elements 30 is provided in a one-to-one correspondence with the first opening 42.

[0120] There can be multiple protective elements 30, each corresponding to the first opening 42. That is, one protective element 30 is used to cover the part of the first dam 51 exposed from the first opening 42.

[0121] In other embodiments, the protective element 30 is arranged around the display area AA.

[0122] The protective element 30 can be arranged in a ring around the display area AA, and multiple first openings 42 can be respectively arranged corresponding to the protective element 30.

[0123] In some embodiments, the orthographic projection of the protective member 30 onto the substrate 1 is located within the orthographic projection of the first dam 51 onto the substrate 1.

[0124] By setting the protective member 30 so that its orthographic projection on the substrate 1 is located within the orthographic projection of the first dam 51 on the substrate 1, the protrusion of the protective member 30 from the first dam 51 can be avoided from affecting the setting of other structures.

[0125] In some embodiments, the dam structure 5 further includes a second dam 52 located in the non-display area NA, the second dam 52 being spaced apart from the first dam 51, and the second dam 52 being located on the side of the first dam 51 away from the display area AA.

[0126] The second dam 52 is located on the side of the first dam 51 away from the display area AA, allowing the display panel 100 to achieve multi-layered blocking of external water and oxygen from entering the display area through the first dam 51 and the second dam 52. The first dam 51 and the second dam 52 can be made of the same material or can be made simultaneously.

[0127] Please see Figure 4 In some embodiments, the minimum distance from the surface of the first dam 51 away from the substrate 1 to the substrate 1 is H1, and the minimum distance from the surface of the second dam 52 away from the substrate 1 to the substrate 1 is H2, where H1 < H2.

[0128] The second dam 52 is located on the side of the first dam 51 away from the display area AA, and H1 < H2 is set so that the second dam 52 can block water oxygen from entering more areas compared to the first dam 51.

[0129] In some embodiments, the substrate 1 includes a first conductive layer 14, a pixel definition layer 4 is located on the side of the first conductive layer 14 away from the substrate 1, and a first dam 51 is located between the pixel definition layer 4 and the first conductive layer 14.

[0130] The first conductive layer 14 is a conductive layer forming the aforementioned source 131 and drain 132, or it can be a conductive layer used for connection with vias of the source 131 and drain 132. A first dam 51 can be disposed on the first conductive layer 14 to facilitate the fabrication of the desired structure of the first dam 51 and to insulate the first conductive layer 14. Optionally, the substrate 1 further includes a second conductive layer 15 located on the side of the first conductive layer 14 near the substrate, with the second dam 52 covering the ends of the first conductive layer 14 and the second conductive layer 15 that are opposite to the display area AA.

[0131] In some embodiments, the first dam 51 and the second dam 52 form a second opening 43 at intervals, and the pixel definition layer 4 extends into the second opening 43 and contacts the first conductive layer 14.

[0132] The first dam 51 and the second dam 52 form a second opening 43, which makes the path for water and oxygen to enter the display area from the outside have multiple bends, which helps to increase the path length and helps to block water and oxygen from entering the display area.

[0133] In some embodiments, the orthographic projection of the pixel definition layer 4 onto the substrate 1 covers the orthographic projection of the second dam 52 onto the substrate 1.

[0134] Since the second dam 52 is located on the side of the first dam 51 away from the display area AA, and the second dam 52 is spaced apart from the first dam 51, it is difficult for the small amount of water vapor remaining in the second dam 52 to move to the first dam 51. Therefore, the pixel definition layer 4 does not need to provide an opening for water vapor discharge for the second dam 52.

[0135] Please refer to the following: Figure 6 In some embodiments, the display panel 100 further includes an isolation structure 2 located on the side of the pixel definition layer 4 away from the substrate 1. The isolation structure 2 has a plurality of isolation openings 23 communicating with the pixel openings 41, and at least a portion of the light-emitting unit 3 is located within the isolation openings 23.

[0136] The isolation structure 2 is described in patents CN118251982A, 202410864269.8, PT / N2024 / 09R407, PCT / CNP02A09R217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A, which are provided for reference.

[0137] The isolation structure 2 can be directly disposed on the side of the pixel definition layer 4 facing away from the substrate 1, and the isolation structure 2 is supported by the pixel definition layer 4. The isolation structure 2 forms a plurality of isolation openings 23, and adjacent isolation openings 23 are spaced apart by the isolation structure 2. The number of isolation openings 23 can correspond one-to-one with the number of light-emitting units 3.

[0138] The encapsulation portion 631 may be entirely disposed within the isolation opening 23, or may extend partially to the outside of the isolation opening 23. The edge of the encapsulation portion 631 overlaps with the isolation structure 2 to avoid or reduce the formation of a gap between the encapsulation portion 631 and the isolation structure 2 that allows water and oxygen to pass through.

[0139] In some embodiments, the isolation structure 2 includes a first isolation layer 21 and a second isolation layer 22 stacked together. The first isolation layer 21 is disposed on the side of the second isolation layer 22 close to the substrate 1, and the orthographic projection of the first isolation layer 21 on the substrate 1 is located within the orthographic projection of the second isolation layer 22 on the substrate 1.

[0140] The isolation structure 2 encloses and forms an isolation opening 23 to define the area where the light-emitting device layer is disposed. The isolation structure 2 includes a first isolation layer 21 and a second isolation layer 22 stacked together. The orthographic projection of the first isolation layer 21 on the substrate 1 is located within the orthographic projection of the second isolation layer 22 on the substrate 1, such that the cross-sectional area of ​​the isolation structure 2 at the end away from the substrate 1 is larger, and the cross-sectional area of ​​the isolation structure 2 at the end closer to the substrate 1 is smaller. Along the direction from the isolation structure 2 to the substrate 1, the second isolation layer 22 completely blocks the first isolation layer 21.

[0141] When fabricating the light-emitting unit 3, the light-emitting material A used to fabricate the light-emitting unit 3 can be deposited onto the isolation structure 2 using vapor deposition technology. Because the second isolation layer 22 blocks the first isolation layer 21, the light-emitting material A used to fabricate the light-emitting unit 3 experiences a significant drop at the edge of the second isolation layer 22. The light-emitting material A falling into the isolation opening 23 and the light-emitting material A falling onto the second isolation layer 22 are difficult to connect, resulting in breakage and the formation of light-emitting materials A spaced apart within adjacent isolation openings 23. Compared to the related technologies that use photomasks to deposit the light-emitting device layer, this application, by setting the first isolation layer 21 and the second isolation layer 22, allows the light-emitting unit 3 located within the isolation opening 23 to be fabricated without a metal photomask, thus saving the cost of fabricating a metal photomask. Compared to fabricating the light-emitting device layer using a high-precision metal photomask, directly fabricating the high-precision isolation structure 2 is easier to achieve, making the structure of the display panel 100 provided by this application less demanding on the fabrication process, and resulting in better consistency of the fabricated display panel 100.

[0142] In some embodiments, within the display area AA, the surface of the second isolation layer 22 facing away from the substrate 1 has a smaller projected area on the substrate 1 than the surface of the second isolation layer 22 approaching the substrate 1 has a smaller projected area on the substrate 1.

[0143] The second isolation layer 22 extends outward by a predetermined distance relative to the first isolation layer 21. That is, the surface of the second isolation layer 22 facing away from the substrate 1 has a smaller orthogonal projection area on the substrate 1 than the surface of the second isolation layer 22 facing the substrate 1. This results in the second isolation layer 22 having an inclined ramp structure, so as to define the pattern of the light-emitting unit 3 through the second isolation layer 22.

[0144] In some embodiments, within the display area AA, the cross-sectional area of ​​the second isolation layer 22 gradually decreases in the direction away from the substrate 1.

[0145] Optionally, the cross-section of the second isolation layer 22 is a trapezoid with the bottom edge facing the substrate 1, so that the second isolation layer 22 has a sloping surface, which is beneficial to the material being broken at the edge of the partition, forming a state in which part of the material is located on the second isolation layer 22 and part of the material is located in the isolation opening 23.

[0146] In some embodiments, within the display area AA, the surface of the first isolation layer 21 facing away from the substrate 1 has a smaller projected area on the substrate 1 than the surface of the second isolation layer 22 facing away from the substrate 1.

[0147] That is, the second isolation layer 22 extends outward relative to the first isolation layer 21 to restrict the pattern of the light-emitting unit 3. The area of ​​the second isolation layer 22 is larger than that of the first isolation layer 21, and it is completely covered by the first isolation layer 21. At this time, the first isolation layer 21 is recessed relative to the second isolation layer 22 in a direction away from the isolation opening 23. When the light-emitting unit 3 is fabricated, at least part of the material used to fabricate the light-emitting unit 3 has a large drop at the edge of the isolation structure 2, and the first isolation layer 21 is recessed. The material used to fabricate the light-emitting unit 3 is difficult to connect on the outside of the isolation structure 2, resulting in breakage and forming mutually isolated light-emitting units 3.

[0148] Optionally, within the display area AA, the isolation structure 2 is in the form of a grid, and the isolation openings 23 are arranged in an array to improve the light emission uniformity of the set light-emitting units 3.

[0149] Please refer to the following: Figure 7 In some embodiments, the isolation structure 2 further includes a third isolation layer 24 stacked on top of the first isolation layer 21 on the side close to the substrate 1. In the display area AA, the orthographic projection of the first isolation layer 21 on the substrate 1 is located within the orthographic projection of the third isolation layer 24 on the substrate 1.

[0150] Within the display area AA, the cross-section of the isolation structure 2 can be I-shaped. Optionally, the projected area of ​​the first isolation layer 21 on the substrate 1 is smaller than the projected area of ​​the third isolation layer 24 on the substrate 1.

[0151] The cross-section of the first isolation layer 21 can be trapezoidal, increasing the size of the isolation opening 23. The cross-sectional shape of the first isolation layer 21 can be a regular trapezoid, which on the one hand provides stable support for the second isolation layer 22, and on the other hand reduces the contact area between the first isolation layer 21 and the second isolation layer 22. The orthographic projection of the first isolation layer 21 on the substrate 1 lies within the orthographic projection of the third isolation layer 24 on the substrate 1, allowing the third isolation layer 24 to stably support the first isolation layer 21. This enables the first isolation layer 21 to be recessed relative to the second isolation layer 22 in a direction away from the central axis of the isolation opening 23, facilitating the disconnection of the light-emitting device layer at the isolation structure 2. Etching waste generated from etching the first isolation layer 21 falls onto the third isolation layer 24, making cleaning easier.

[0152] In some embodiments, the light-emitting unit 3 includes a first electrode 31, a light-emitting part 32, and a second electrode 33 stacked sequentially in a direction away from the substrate 1, and the second electrode 33 overlaps with the isolation structure 2.

[0153] One of the first electrode 31 and the second electrode 33 can be a cathode and the other can be an anode. The first electrode 31 and the second electrode 33 are respectively connected to the light-emitting unit 3 and used to drive the light-emitting unit 3 to emit light. The encapsulation part 631 can cover the side of the second electrode 33 facing away from the substrate 1. The encapsulation part 631 can reduce or prevent water and oxygen from entering the light-emitting unit 3 and improve the service life of the light-emitting unit 3. Optionally, the first electrode 31 is an anode and the second electrode 33 is a cathode.

[0154] In some embodiments, the second electrode 33 is electrically connected to the isolation structure 2.

[0155] The edge of the second electrode 33 overlaps with the first isolation layer 21, so that the first isolation layer 21 can supply power to the second electrode 33 and also enable adjacent second electrodes 33 to conduct electricity, thereby forming a surface electrode that conducts electricity across the entire surface.

[0156] In other embodiments, the second electrode 33 is electrically connected to the third isolation layer 24. The third isolation layer 24 is made of molybdenum metal; and / or the first isolation layer 21 is made of aluminum metal; and / or the second isolation layer 22 is made of titanium metal.

[0157] In some embodiments, the orthographic projection of the pixel opening 41 on the substrate 1 is located within the orthographic projection range of the isolation opening 23 on the substrate 1.

[0158] The area of ​​the isolation opening 23 is larger than the area of ​​the pixel opening 41, which can reduce the impact of the isolation structure 2 on the viewing angle of the light emitted by the light-emitting device.

[0159] Optionally, there may be multiple pixel openings 41, which are spaced apart. The isolation structure 2 may be disposed on at least a portion of the pixel defining portion between two adjacent pixel openings 41. Optionally, the isolation structure 2 may be disposed around at least a portion of the pixel openings 41.

[0160] In some embodiments, a portion of the pixel definition layer 4 is located between adjacent first electrodes 31, that is, the pixel definition layer 4 has the function of insulating adjacent first electrodes 31, so that the light emission of the corresponding light-emitting part 32 can be controlled by each first electrode 31.

[0161] An embodiment of the second aspect of this application also provides a display panel 100, please refer to... Figures 1 to 4 The display panel 100 has a display area AA and a non-display area NA, with the non-display area NA at least partially surrounding the display area AA. The display panel 100 includes: a substrate 1, a dam structure 5, an inorganic layer, a light-emitting device layer, a first encapsulation layer 61, a second encapsulation layer 62, and a protective element 30. The dam structure 5 is disposed on one side of the substrate 1 and includes a first dam 51 located in the non-display area NA. The inorganic layer is disposed on the side of the dam structure 5 facing away from the substrate 1. The pixel definition layer 4 includes a first opening 42 located in the non-display area NA, and the orthographic projection of the first opening 42 onto the substrate 1 at least partially overlaps with the orthographic projection of the first dam 51 onto the substrate 1. The light-emitting device layer includes multiple elements located in the display area AA. The light-emitting unit 3 in area AA is disposed within the pixel opening 41; the first encapsulation layer 61 is located on the side of the light-emitting device layer away from the substrate 1, and the orthographic projection of the first encapsulation layer 61 on the substrate 1 covers the orthographic projection of the dam structure 5 on the substrate 1; the second encapsulation layer 62 is at least partially disposed in the display area AA, and the second encapsulation layer 62 is disposed between the light-emitting device layer and the first encapsulation layer 61, and the first dam 51 is located on the side of the second encapsulation layer 62 closer to the non-display area; the protective member 30 is located in the non-display area NA, and the orthographic projection of the protective member 30 on the substrate 1 at least partially overlaps with the orthographic projection of the first opening 42 on the substrate 1, and the protective member 30 is disposed between the first dam 51 and the first encapsulation layer 61.

[0162] In the display panel 100 provided in this application, by providing a first opening 42 in the inorganic layer, when the encapsulation material used to prepare the second encapsulation layer 62 overflows, the encapsulation material can be intercepted at the first opening 42, preventing or reducing the overflow of fluid material from the display area to the side of the first dam 51 away from the display area; providing the first opening 42 in the non-display area NA is beneficial to increasing the distribution density of the light-emitting unit 3 in the display area; by providing that the orthographic projection of the protective member 30 on the substrate 1 at least partially overlaps with the orthographic projection of the first opening 42 on the substrate 1, the first dam 51 is prevented or reduced from being exposed through the first opening 42 during the preparation process, thus preventing or reducing damage to the first dam 51 exposed from the first opening 42 during the preparation of the display panel 100, enabling the first encapsulation layer 61 to form a continuous film at the first opening 42, improving the encapsulation performance of the display panel 100, and increasing the service life of the display panel 100.

[0163] In some embodiments, the inorganic layer is a pixel definition layer 4; the inorganic layer also includes a pixel opening 41 located in the display area AA, and at least a portion of the light-emitting unit 3 is disposed within the pixel opening 41.

[0164] In some embodiments, the light-emitting unit 3 includes a first electrode 31 and a light-emitting part 32. The first electrode 31 is disposed on the side of the light-emitting part 32 close to the substrate 1, and the protective member 30 is disposed in the same layer as the first electrode 31, thereby simplifying the manufacturing process.

[0165] An embodiment of the third aspect of this application also provides a method for manufacturing a display panel, the display panel 100 having a display area AA and a non-display area NA, the non-display area NA being disposed around at least a portion of the display area AA; the manufacturing method includes:

[0166] S100, a substrate 1 is provided, and a dam structure 5 is provided on the substrate 1. The dam structure 5 includes a first dam 51 located in a non-display area.

[0167] S200, a protective element 30 is provided on the first dam 51, and a plurality of first electrodes 31 located in the display area are provided on one side of the substrate 1;

[0168] S300, a pixel definition material layer and an isolation material layer are sequentially disposed on the substrate 1, and the pixel definition material layer covers the first electrode 31, the protective member 30 and the first dam 51;

[0169] S400, the isolation material layer and the pixel definition material layer are patterned to obtain the isolation structure 2 and the pixel definition layer 4. The pixel definition layer 4 includes a pixel opening 41 located in the display area and a first opening 42 located in the non-display area. The orthographic projection of the first opening 42 on the substrate 1 at least partially overlaps with the orthographic projection of the first dam 51 on the substrate 1. The first electrode 31 is exposed from the pixel opening 41.

[0170] Between S200 and S300, the process may also include drying the dam structure 5 to remove water vapor from the dam structure 5.

[0171] In S400, the pixel definition material layer is used to fabricate the pixel definition layer 4. The pixel definition material layer can be patterned using a dry etching process, allowing the dam structure 5 to be exposed from the first opening 42.

[0172] In S400, the isolation material layer and pixel definition material layer can be patterned using wet and dry etching processes to obtain the required isolation structure 2 and pixel definition layer 4. The isolation material layer and pixel definition material layer located in the non-display area NA do not need to form pixel openings 41 and isolation openings 23. Photoresist can be used to cover the isolation material layer and pixel definition material layer located in the non-display area NA. After the isolation structure 2 and pixel definition layer 4 are fabricated, the photoresist can be removed.

[0173] The etching solution used in forming the isolation structure 2, the preparation used to remove excess light-emitting material in the preparation of the light-emitting unit 3, and the photoresist are all blocked by the protective component 30, thereby preventing the preparation from entering the dam structure 5 and thus preventing or reducing the collapse of the prepared first dam 51. The protective component 30 can also protect the first dam 51 from etching damage, thereby preventing or reducing the collapse of the prepared first dam 51.

[0174] In some embodiments, the preparation method further includes:

[0175] S500, a light-emitting device layer is formed on one side of the substrate 1. The light-emitting device layer includes a plurality of light-emitting units 3 located in the display area AA. The light-emitting units 3 are disposed in the pixel opening 41.

[0176] S600, a first encapsulation layer 61 is formed on the side of the light-emitting device layer away from the substrate 1. The orthographic projection of the first encapsulation layer 61 onto the substrate 1 covers the orthographic projection of the dam structure 5 onto the substrate. The protective member 30 is disposed between the first dam 51 and the first encapsulation layer 61.

[0177] In S500, the light-emitting unit 3, excluding the first electrode 31, is prepared in steps, and light-emitting units 3 of different colors can be prepared in stages. For example: a first light-emitting material is deposited by vapor deposition, and the light-emitting material located in the first isolation opening 23 is retained to form a first light-emitting unit 3 for emitting light of the first color. The light-emitting material in the other isolation openings 23 is removed. Then, a second light-emitting material is deposited by vapor deposition, and the light-emitting material located in the second isolation opening 23 is retained to form a first light-emitting unit 3 for emitting light of the second color. The light-emitting material in the other isolation openings 23 is removed. This process is repeated until the desired type of light-emitting unit 3 is obtained.

[0178] In some embodiments, S200 includes:

[0179] S201, a first electrode 31 material is disposed on one side of the substrate 1, and the first electrode 31 material covers the first dam 51;

[0180] S202, the material of the first electrode 31 is patterned to obtain the protective component 30 and the first electrode 31.

[0181] The protective component 30 and the first electrode 31 are prepared together, thereby simplifying the preparation process.

[0182] An embodiment of the fourth aspect of this application also provides a display device. Referring to Figures 1 and 2, the display device includes a display panel 100 prepared according to any of the embodiments of the first or second aspect, or any of the embodiments of the third aspect. Since the display device provided by the embodiment of the fourth aspect of this application includes a display panel 100 prepared according to any of the embodiments of the first or second aspect, or any of the embodiments of the third aspect, the display device provided by the embodiment of the fourth aspect of this application has the beneficial effects of the display panel 100 prepared according to any of the embodiments of the first or second aspect, or any of the embodiments of the third aspect, which will not be elaborated further here.

[0183] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0184] The embodiments described above are not exhaustive and do not limit the invention to specific examples. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that, The display panel has a display area and a non-display area, the non-display area being disposed around at least a portion of the display area; the display panel includes: substrate; A dam structure is disposed on one side of the substrate, the dam structure including a first dam located in the non-display area; A pixel definition layer is disposed on the side of the dam structure away from the substrate. The pixel definition layer includes a pixel opening located in the display area and a first opening located in the non-display area. The orthographic projection of the first opening on the substrate and the orthographic projection of the first dam on the substrate at least partially overlap. The light-emitting device layer includes a plurality of light-emitting units located in the display area, at least a portion of the light-emitting units being disposed within the pixel opening; A protective element is located on the side of the first dam away from the substrate and on the side of the pixel definition layer facing the substrate. The orthographic projection of the protective element on the substrate at least partially overlaps with the orthographic projection of the first opening on the substrate.

2. The display panel according to claim 1, characterized in that, The protective component comprises inorganic materials; Preferably, the light-emitting unit includes a first electrode and a light-emitting part, the first electrode is disposed on the side of the light-emitting part close to the substrate, and the protective member is disposed in the same layer as the first electrode; Preferably, the first dam comprises organic materials.

3. The display panel according to claim 1, characterized in that, The protective element includes a first surface and a second surface disposed opposite to each other, and a side surface connected to the first surface. The first surface is disposed on the side of the second surface away from the substrate, and the pixel definition layer covers at least part of the side surface. Preferably, the pixel definition layer extends along the surface of the first dam away from the substrate to the first surface.

4. The display panel according to claim 1, characterized in that, The display panel also includes: The first encapsulation layer is located on the side of the light-emitting device layer facing away from the substrate. The orthographic projection of the first encapsulation layer on the substrate covers the orthographic projection of the dam structure on the substrate. The protective member is disposed between the first dam and the first encapsulation layer. Preferably, the first encapsulation layer includes a first portion and a second portion connected to each other, the first portion being located in the display area, the second portion being located in the non-display area, the second portion contacting the surface of the pixel definition layer opposite to the substrate and extending along the pixel definition layer into the first opening; Preferably, the second portion located within the first opening contacts the surface of the protective member that is away from the substrate.

5. The display panel according to claim 4, characterized in that, The display panel further includes a second encapsulation layer, which is at least partially disposed in the display area. The second encapsulation layer is disposed between the light-emitting device layer and the first encapsulation layer, and the first dam is located on the side of the second encapsulation layer closer to the non-display area. Preferably, the first encapsulation layer is an inorganic material layer, and the second encapsulation layer is an organic material layer; Preferably, the display panel further includes a third encapsulation layer, which is located between the light-emitting device layer and the second encapsulation layer. The third encapsulation layer includes a plurality of spaced-apart encapsulation portions, and the orthographic projection of the encapsulation portions on the substrate overlaps with the orthographic projection of the light-emitting unit on the substrate. Preferably, the third encapsulation layer is an inorganic material layer.

6. The display panel according to claim 1, characterized in that, The orthographic projection of the first opening on the substrate is located within the orthographic projection of the first dam on the substrate; Preferably, there are multiple first openings, the first dam is arranged around the display area, and the multiple first openings are arranged at intervals around the display area; Preferably, there are multiple protective components, and each of the multiple protective components is provided in a one-to-one correspondence with the first opening; Preferably, the orthographic projection of the protective member onto the substrate is located within the orthographic projection of the first dam onto the substrate.

7. The display panel according to claim 1, characterized in that, The dam structure also includes a second dam located in the non-display area, the second dam being spaced apart from the first dam, and the second dam being located on the side of the first dam away from the display area.

8. The display panel according to claim 7, characterized in that, The substrate includes a first conductive layer, the pixel definition layer is located on the side of the first conductive layer opposite to the substrate, and the first dam is located between the pixel definition layer and the first conductive layer.

9. The display panel according to claim 1, characterized in that, The display panel further includes an isolation structure located on the side of the pixel definition layer opposite to the substrate. The isolation structure has multiple isolation openings that communicate with the pixel openings, and at least a portion of the light-emitting unit is located within the isolation openings. Preferably, the isolation structure includes a first isolation layer and a second isolation layer stacked together, the first isolation layer being disposed on the side of the second isolation layer close to the substrate, and the orthographic projection of the first isolation layer on the substrate being located within the orthographic projection of the second isolation layer on the substrate; Preferably, within the display area, the projected area of ​​the surface of the second isolation layer facing away from the substrate on the substrate is smaller than the projected area of ​​the surface of the second isolation layer facing away from the substrate on the substrate. Preferably, within the display area, the projected area of ​​the surface of the first isolation layer facing away from the substrate on the substrate is smaller than the projected area of ​​the surface of the second isolation layer facing away from the substrate on the substrate.

10. The display panel according to claim 9, characterized in that, The light-emitting unit includes a first electrode, a light-emitting part, and a second electrode stacked sequentially along a direction away from the substrate, wherein the second electrode overlaps with the isolation structure. Preferably, a portion of the pixel definition layer is located between adjacent first electrodes.

11. A display panel, characterized in that, The display panel has a display area and a non-display area, the non-display area being disposed around at least a portion of the display area; the display panel includes: substrate; A dam structure is disposed on one side of the substrate, the dam structure including a first dam located in the non-display area; An inorganic layer is disposed on the side of the dam structure away from the substrate. The inorganic layer includes a first opening located in the non-display area. The orthographic projection of the first opening on the substrate and the orthographic projection of the first dam on the substrate at least partially overlap. The light-emitting device layer includes a plurality of light-emitting units located in the display area; A first encapsulation layer is located on the side of the light-emitting device layer facing away from the substrate, and a portion of the first encapsulation layer is located within the first opening; A second encapsulation layer is at least partially disposed in the display area, the second encapsulation layer is disposed between the light-emitting device layer and the first encapsulation layer, and the first dam is located on the side of the second encapsulation layer closer to the non-display area; A protective element is located in the non-display area, wherein the orthographic projection of the protective element on the substrate at least partially overlaps with the orthographic projection of the first opening on the substrate, and the protective element is disposed between the first dam and the inorganic layer.

12. The display panel according to claim 11, characterized in that, The inorganic layer is a pixel definition layer; the inorganic layer also includes a pixel opening located in the display area, and at least a portion of the light-emitting unit is disposed within the pixel opening; Preferably, the light-emitting unit includes a first electrode and a light-emitting part, the first electrode is disposed on the side of the light-emitting part close to the substrate, and the protective member is disposed in the same layer as the first electrode.

13. A method for manufacturing a display panel, characterized in that, The display panel has a display area and a non-display area, wherein the non-display area is disposed around at least a portion of the display area; the manufacturing method includes: A substrate is provided, on which a dam structure is disposed, the dam structure including a first dam located in the non-display area; A protective element is installed on the first dam, and a plurality of first electrodes located in the display area are provided on one side of the substrate; A pixel definition material layer and an isolation material layer are sequentially disposed on the substrate, wherein the pixel definition material layer covers the first electrode, the protective member, and the first dam. The isolation material layer and the pixel definition material layer are patterned to obtain an isolation structure and a pixel definition layer. The pixel definition layer includes a pixel opening located in the display area and a first opening located in the non-display area. The orthographic projection of the first opening on the substrate and the orthographic projection of the first dam on the substrate at least partially overlap. The first electrode is exposed from the pixel opening.

14. The method for manufacturing a display panel according to claim 13, characterized in that, The step of setting a protective element on the first dam and setting a plurality of first electrodes located in the display area on one side of the substrate includes: A first electrode material is disposed on one side of the substrate, and the first electrode material covers the first dam; The first electrode material is patterned to obtain the protective component and the first electrode.

15. A display device, characterized in that, It includes a display panel as described in any one of claims 1 to 12, or a display panel prepared by the preparation method as described in any one of claims 13 to 14.

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