Display panel, flexible display device and preparation method of display panel

Abstract

The invention provides a display panel, a flexible display device and a preparation method of the display panel, the display panel comprises a substrate, an isolation structure and a light-emitting functional layer, the isolation structure is arranged on one side of the substrate, and a plurality of opening structures are formed by enclosing. The light-emitting functional layer is arranged on one side of the substrate and comprises a plurality of light-emitting structures corresponding to the opening structures. Wherein the isolation structure is provided with a first stress release part, the first stress release part is provided with an opening part deviating from one side of the substrate, and the first stress release part penetrates into at least part of the isolation structure along the thickness direction of the substrate. In the embodiment of the invention, in the bending process, the first stress release part can generate larger deformation to meet the bending requirement, so that the deformation corresponding to at least part of structures in the isolation structure can be reduced, the deformation influence of the isolation structure on the light-emitting structure is further reduced, and the light-emitting efficiency of the light-emitting structure is improved. Therefore, the risk of abnormal display of the light-emitting structure due to bending deformation of the display panel is reduced, and the display reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display panel, a flexible display device, and a method for manufacturing a display panel. Background Art

[0002] Flat display panels, such as organic light emitting diode (OLED) display panels and display panels using light emitting diode (LED) devices, have been widely used in various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream display device. Summary of the Invention

[0003] The embodiments of the present application provide a display panel, a flexible display device, and a method for manufacturing a display panel, which can improve reliability.

[0004] In a first aspect, embodiments of the present application provide a display panel comprising a substrate, an isolation structure, and a light-emitting functional layer. The isolation structure is disposed on one side of the substrate and encloses a plurality of opening structures. The light-emitting functional layer is disposed on one side of the substrate and includes a plurality of light-emitting structures disposed corresponding to the opening structures. The isolation structure is provided with a first stress relief portion, the first stress relief portion having an opening facing away from the substrate, and the first stress relief portion penetrates at least a portion of the isolation structure along the thickness direction of the substrate.

[0005] In some embodiments, the isolation structure includes a first isolation portion and a second isolation portion stacked in sequence in a direction away from the substrate, and the first stress release portion is at least partially located in the second isolation portion.

[0006] In some embodiments, the first stress relief portion penetrates the first isolation portion.

[0007] In some embodiments, the first stress relief portion penetrates the second isolation portion.

[0008] In some embodiments, the display panel further comprises a first electrode layer disposed on a side of the light-emitting functional layer facing away from the substrate, the first electrode layer comprising a plurality of first electrodes spaced apart, the first isolation portion comprising a conductive material, the first electrode overlapping the conductive material of the first isolation portion.

[0009] In some embodiments, the display panel further includes a pixel definition layer disposed on one side of the substrate. The pixel definition layer includes a pixel defining portion and a pixel opening enclosed by the pixel defining portion. The isolation structure is located on a side of the pixel defining portion facing away from the substrate. The pixel defining portion is provided with a second stress relief portion, and the first stress relief portion is in communication with the second stress relief portion.

[0010] In some embodiments, an orthographic projection of the first stress relief portion on the substrate coincides with an orthographic projection of the second stress relief portion on the substrate.

[0011] In some embodiments, the display panel further comprises an encapsulation layer disposed on a side of the light-emitting functional layer facing away from the substrate, the encapsulation layer comprising a plurality of encapsulation portions disposed corresponding to the opening structures, gaps being provided between adjacent encapsulation portions, the gaps being connected to the first stress release portion.

[0012] In some embodiments, an orthographic projection of the first stress relief portion on the substrate is located within an orthographic projection of the gap on the substrate.

[0013] In some embodiments, the display panel further includes a flexible structure disposed in the first stress release portion.

[0014] In some embodiments, the flexible structure is at least partially located within the gap.

[0015] In some embodiments, a side of the flexible structure facing away from the substrate is flush with a side of the packaging portion facing away from the substrate.

[0016] In some embodiments, the flexible structure includes a light-blocking material.

[0017] In some embodiments, the display panel includes a main portion and a bent portion that are adjacent to each other, and at least a portion of the first stress release portion is disposed in the bent portion.

[0018] In some embodiments, there may be multiple first stress release portions, and the orthographic projection area of ​​a single first stress release portion on the substrate tends to gradually decrease in the direction from the bending portion to the main body portion.

[0019] In some embodiments, the depth of the first stress release portion decreases gradually from the bent portion toward the main body portion.

[0020] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel in any of the aforementioned embodiments.

[0021] In a third aspect, an embodiment of the present application provides a method for manufacturing a display panel, comprising:

[0022] An isolation structure is formed on one side of the substrate, wherein the isolation structure encloses a plurality of opening structures;

[0023] Removing a portion of the isolation structure so that a first stress release portion is provided in the isolation structure, wherein the first stress release portion has a first opening portion facing away from the substrate;

[0024] A light-emitting functional layer is sequentially formed on one side of the substrate, and the light-emitting functional layer includes a plurality of light-emitting structures arranged corresponding to the opening structures.

[0025] In some embodiments, before removing part of the structure in the isolation structure, the method further includes:

[0026] forming a pixel definition layer on one side of the substrate, the pixel definition layer including a pixel defining portion and a pixel opening formed by the pixel defining portion, and the isolation structure being located on a side of the pixel defining portion facing away from the substrate;

[0027] Part of the structure in the isolation structure is removed, and part of the structure in the pixel defining portion is removed simultaneously, so as to form a second stress releasing portion in the pixel defining portion that is connected to the first stress releasing portion.

[0028] In some embodiments, after removing part of the structure in the isolation structure, the method further includes:

[0029] A flexible structure is formed by filling the first stress relief portion.

[0030] In a third aspect, an embodiment of the present application provides a method for manufacturing a display panel, comprising:

[0031] An isolation structure is formed on one side of the substrate, wherein the isolation structure encloses a plurality of opening structures;

[0032] A light-emitting functional layer and an encapsulation layer are sequentially formed on one side of the substrate, wherein the light-emitting functional layer includes a plurality of light-emitting structures arranged corresponding to the opening structures, and the encapsulation layer includes encapsulation parts arranged corresponding to the plurality of opening structures, with gaps being provided between adjacent encapsulation parts;

[0033] A portion of the structure of the isolation structure at a position corresponding to the gap is removed, so that the isolation structure is provided with a first stress release portion communicating with the gap.

[0034] The embodiments of the present application provide a display panel, a flexible display device, and a method for preparing a display panel. During the bending process, a larger deformation can be generated at the first stress release portion to meet the bending requirements. This can reduce the deformation corresponding to at least part of the structure in the isolation structure, thereby reducing the deformation effect of the isolation structure on the light-emitting structure, thereby reducing the risk of display abnormalities in the light-emitting structure due to bending and deformation of the display panel, and improving display reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 is a schematic cross-sectional structural diagram of a display panel provided in an embodiment of the present application;

[0037] Figure 2 This is a schematic top view of an isolation structure and a pixel defining portion in a display panel provided by an embodiment of the present application;

[0038] Figure 3 This is a schematic top view of the structure of an isolation structure and a pixel defining portion in another display panel provided by an embodiment of the present application;

[0039] Figure 4 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0040] Figure 5 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0041] Figure 6 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0042] Figure 7 is a schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0043] Figure 8 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0044] Figure 9 is a top view schematic diagram of another display panel provided in an embodiment of the present application;

[0045] Figure 10 is a structural schematic diagram of a display device provided in an embodiment of the present application;

[0046] Figure 11 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0047] Figures 12a to 12c This is a schematic diagram of the process structure of a method for manufacturing a display panel provided in an embodiment of the present application;

[0048] Figure 13 is a flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0049] Figures 14a to 14cThis is a schematic diagram of the process structure of another method for manufacturing a display panel provided in an embodiment of the present application;

[0050] Figure 15 is a flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0051] Figures 16a to 16c This is a schematic diagram of the process structure of another method for preparing a display panel provided in an embodiment of the present application.

[0052] Marking Description:

[0053] 10. Substrate;

[0054] 20. Isolation structure; 21. Opening structure; 22. First isolation portion; 23. Second isolation portion;

[0055] 30. Light-emitting functional layer; 31. Light-emitting structure;

[0056] 40. pixel definition layer; 41. pixel definition portion;

[0057] 50. First electrode layer; 51. First electrode;

[0058] 60. Second electrode layer; 61. Second electrode;

[0059] 70. Encapsulation layer; 71. Encapsulation unit;

[0060] 80. Flexible structure;

[0061] B1, main body; B2, bending part;

[0062] H1, first stress relief portion; H2, second stress relief portion;

[0063] K, first opening;

[0064] J, gap;

[0065] X, thickness direction. DETAILED DESCRIPTION

[0066] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0067] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0068] In related art, display panels can be provided with an isolation structure to isolate different light-emitting structures. However, this type of display panel is prone to display failure and other issues when bent or deformed. The inventors have discovered that this is because the isolation structure itself is rigid and the light-emitting structures are relatively close to each other. Therefore, during bending and deformation, the isolation structure can easily pull on adjacent light-emitting structures, causing some light-emitting structures to fail, impacting the display reliability of the display panel.

[0069] For this reason, see Figure 1 An embodiment of the present application provides a display panel, comprising a substrate 10, an isolation structure 20, and a light-emitting functional layer 30. The isolation structure 20 is disposed on one side of the substrate 10 and encloses a plurality of opening structures 21. The light-emitting functional layer 30 is disposed on one side of the substrate 10 and includes a plurality of light-emitting structures 31 disposed corresponding to the opening structures 21. The isolation structure 20 is provided with a first stress relief portion H1 having a first opening K facing away from the substrate 10. The first stress relief portion H1 penetrates at least a portion of the isolation structure 20 along the thickness direction X of the substrate 10.

[0070] The substrate 10 primarily serves as a support and bearing structure, with other film layers stacked sequentially on the substrate 10. The stacking mentioned here refers to the sequential arrangement of the other film layers along the thickness direction X of the substrate 10. The substrate 10 may include a variety of film layer structures, and the specific film layer structure of the substrate 10 is not limited in this embodiment of the present application. Furthermore, to meet bending requirements, the substrate 10 may be a flexible substrate 10, i.e., the substrate 10 includes a flexible material.

[0071] The light-emitting functional layer 30 is provided on one side of the substrate 10, and the light-emitting functional layer 30 includes a plurality of light-emitting structures 31. For example, a pixel definition layer 40 is further provided in the display panel, and the pixel definition layer 40 includes a pixel defining portion 41 and a pixel opening formed by the pixel defining portion 41. The light-emitting structures 31 can be provided in different pixel openings. Furthermore, the display panel is further provided with two electrode layers on both sides of the light-emitting functional layer 30 in the thickness direction X. The first electrode layer 50 is located on the side of the light-emitting functional layer 30 facing away from the substrate 10, and the second electrode layer 60 is located on the side of the light-emitting functional layer 30 facing the substrate 10. The second electrode layer 60 includes a plurality of second electrodes 61, and the second electrodes 61 are at least partially exposed to the pixel opening. Among them, the first electrode 51 can be a cathode, and the second electrode 61 can be an anode.

[0072] For example, the plurality of light-emitting structures 31 include, but are not limited to, a red light-emitting structure 31 for emitting red light, a green light-emitting structure 31 for emitting green light, and a blue light-emitting structure 31 for emitting blue light. Each light-emitting structure 31 may include a stacked hole injection layer (HIL), a hole transport layer (HTL), a light-emitting layer, an electron injection layer (EIL), and an electron transport layer (ETL).

[0073] The isolation structure 20 and the light-emitting functional layer 30 are arranged on the same side of the substrate 10. For example, the isolation structure 20 is arranged on the side of the pixel defining portion 41 away from the substrate 10, and the opening structure 21 formed by the isolation structure 20 can be arranged corresponding to the pixel opening formed by the pixel defining portion 41, wherein one opening structure 21 can only cover one pixel opening, or one opening structure 21 can also cover multiple pixel openings at the same time, and the embodiments of the present application do not limit this.

[0074] The presence of the isolation structure 20 can separate the light-emitting structures 31 at different opening structure 21 positions during the display panel preparation process, and separate the different first electrodes 51 corresponding to different light-emitting structures 31, so that the first electrode layer 50 includes multiple first electrodes 51 arranged at intervals, thereby selectively achieving independent control or non-independent control of different first electrodes 51.

[0075] It should be noted that the phrase "the light-emitting structure 31 is disposed corresponding to the opening structure 21" mentioned in the embodiments of the present application means that the orthographic projection of the light-emitting structure 31 on the substrate 10 at least partially overlaps with the orthographic projection of the opening structure 21 on the substrate 10, and the non-light-emitting structure 31 is not required to be located within the opening structure 21. Specifically, one opening structure 21 may correspond to only one light-emitting structure 31, or one opening structure 21 may correspond to multiple light-emitting structures 31 simultaneously, and this is not limited in the embodiments of the present application.

[0076] In addition, the embodiment of the present application does not limit the relative positional relationship between the pixel definition layer 40 and the isolation structure 20. For example, at least part of the structure of the isolation structure 20 can be provided on the same layer as the pixel definition portion 41; or the isolation structure 20 can also be located on the side of the pixel definition portion 41 away from the substrate 10. Figure 1 FIG. 1 is a schematic structural diagram showing a case where the isolation structure 20 is located on a side of the pixel defining portion 41 facing away from the substrate 10 .

[0077] To meet the requirements of bending deformation, the present embodiment provides a first stress relief portion H1 in the isolation structure 20. The first stress relief portion H1 can have various forms. For example, the first stress relief portion H1 can be a hole structure, or the first stress relief portion H1 can also be a slot structure. The first stress relief portion H1 can extend along the thickness direction X, or the extension direction of the first stress relief portion H1 can also intersect the thickness direction X, which is not limited in the present embodiment.

[0078] And the first stress release portion H1 can completely or partially penetrate the isolation structure 20. Specifically, when the first stress release portion H1 completely penetrates the isolation structure 20, the first stress release portion H1 can have two opening portions including the first opening portion K; when the first stress release portion H1 only penetrates part of the structure of the isolation structure 20, the first stress release portion H1 will only have one opening portion, the first opening portion K.

[0079] Combined with attachment Figure 1 It can be seen that the different structures in the isolation structure 20 are arranged on both sides of the first stress release portion H1, and the different light-emitting structures 31 are usually located on different sides of the first stress release portion H1. During the bending process, a larger deformation can be generated at the first stress release portion H1 to meet the bending needs. This can reduce the deformation corresponding to at least part of the structure in the isolation structure 20, and then reduce the deformation effect of the isolation structure 20 on the light-emitting structure 31, thereby reducing the risk of display abnormalities in the light-emitting structure 31 due to bending and deformation of the display panel, and improving display reliability.

[0080] It should be noted that the number and size of the first stress release portions H1 are not limited in the present embodiment. Figure 1 and Figure 2 As shown, the number of the first stress release portion H1 can be one, and the orthographic projections of the isolation structure 20 and the first stress release portion H1 on the substrate 10 can both be a mesh structure. Figure 1 and Figure 3 As shown, there may be multiple first stress release portions H1 , which are disposed between adjacent light emitting structures 31 , and the orthographic projection of a single first stress release portion H1 on the substrate 10 may be square, circular or some other shapes.

[0081] In some embodiments, as Figure 1 As shown, the isolation structure 20 includes a first isolation portion 22 and a second isolation portion 23 which are sequentially stacked in a direction away from the substrate 10 , and the first stress release portion H1 is at least partially located in the second isolation portion 23 .

[0082] The isolation structure 20 includes at least a first isolation portion 22 and a second isolation portion 23. The second isolation portion 23 is located on the side of the first isolation portion 22 facing away from the substrate 10. The embodiment of the present application does not limit the dimensional relationship between the first isolation portion 22 and the second isolation portion 23. For example, the orthographic projection of the first isolation portion 22 on the substrate 10 is located within the orthographic projection of the second isolation portion 23 on the substrate 10.

[0083] The first stress relief portion H1 is at least partially located within the second isolation portion 23. The first stress relief portion H1 may only penetrate a portion of the second isolation portion 23, or the first stress relief portion H1 may completely penetrate the second isolation portion 23. When the first stress relief portion H1 completely penetrates the second isolation portion 23, the first stress relief portion H1 may also penetrate at least a portion of the first isolation portion 22, which is not limited in this embodiment of the present application. Optionally, the first stress relief portion H1 penetrates the second isolation portion 23.

[0084] Further, in some optional embodiments, see Figure 4 The first stress release portion H1 passes through the first isolation portion 22, that is, the first stress release portion H1 completely passes through the isolation structure 20. This design enables the first stress release portion H1 to have a larger extension depth, so that during the bending and deformation process of the display panel, the first stress release portion H1 can have a greater degree of deformation, thereby further reducing the degree of deformation at other positions in the isolation structure 20, reducing the impact on the light-emitting structure 31, and improving display reliability.

[0085] Of course, in other embodiments, the first stress relief portion H1 may be disposed only within the first isolation portion 22, i.e., the first stress relief portion H1 does not penetrate the second isolation portion 23. This is not a limitation of the present invention. As long as the first stress relief portion H1 is disposed within the isolation structure 20 to meet the bending requirements of the display panel, the arrangement is satisfactory.

[0086] In some embodiments, the display panel further includes a first electrode layer 50 disposed on a side of the light-emitting functional layer 30 facing away from the substrate 10. The first electrode layer 50 includes a plurality of spaced-apart first electrodes 51. The first isolation portion 22 includes a conductive material, and the first electrodes 51 overlap the conductive material of the first isolation portion 22.

[0087] As can be seen from the above, the first electrodes 51 corresponding to different light-emitting structures 31 are spaced apart from each other due to the presence of the isolation structure 20. Based on this, the different first electrodes 51 can be selectively controlled independently or non-independently according to actual needs.

[0088] Furthermore, in the embodiment of the present application, the first isolation portion 22 includes a conductive material, and the first electrode 51 overlaps the conductive material in the first isolation portion 22. This design allows at least some adjacent first electrodes 51 to be electrically connected to each other via the first isolation portion 22. Furthermore, according to actual use needs, some or all of the first electrodes 51 can be electrically connected to achieve zoned or full-surface drive control of the first electrodes 51.

[0089] In some embodiments, see Figure 5 The display panel further includes a pixel definition layer 40 disposed on one side of the substrate 10. The pixel definition layer 40 includes a pixel defining portion 41 and a pixel opening enclosed by the pixel defining portion 41. The isolation structure 20 is located on the side of the pixel defining portion 41 facing away from the substrate 10. The pixel defining portion 41 is provided with a second stress relief portion H2, and the first stress relief portion H1 is connected to the second stress relief portion H2.

[0090] The pixel defining portion 41 encloses a plurality of pixel openings, and the plurality of light emitting structures 31 are disposed within the plurality of pixel openings. The pixel defining portion 41 is located on the side of the isolation structure 20 facing the substrate 10 , and the first isolation portion 22 in the isolation structure 20 may contact the pixel defining portion 41 .

[0091] On this basis, the embodiment of the present application is provided with a second stress release portion H2 in the pixel defining portion 41, and the second stress release portion H2 can be connected to the first stress release portion H1. Similarly, the second stress release portion H2 also has a variety of forms. For example, the second stress release portion H2 can be a hole structure, or the second stress release portion H2 can also be a groove structure. Specifically, the first stress release portion H1 needs to completely penetrate the first isolation portion 22 and the second isolation portion 23, and the orthographic projection of the second stress release portion H2 on the substrate 10 is at least partially overlapped with the orthographic projection of the first stress release portion H1 on the substrate 10. Among them, the second stress release portion H2 can completely penetrate the pixel defining portion 41, or the second stress release portion H2 can only penetrate part of the structure in the pixel defining portion 41, or the orthographic projection of the second stress release portion H2 on the substrate 10 can also be a mesh or other groove-like structure, and the embodiment of the present application is not limited to this.

[0092] During the display panel bending process, the second stress relief portion H2 can deform along with the first stress relief portion H1. This can simultaneously reduce the deformation of the isolation structure 20 located on a different side of the first stress relief portion H1 and the deformation of the pixel defining portion 41 located on a different side of the second stress relief portion H2. This can further reduce the impact of display panel deformation on the light-emitting structure 31, thereby reducing the risk of failure of the light-emitting structure 31 and improving the light-emitting reliability of the display panel.

[0093] In some embodiments, the orthographic projection of the first stress relief portion H1 on the substrate 10 coincides with the orthographic projection of the second stress relief portion H2 on the substrate 10. This design allows the first stress relief portion H1 and the second stress relief portion H2 to be simultaneously formed during the display panel manufacturing process through processes such as excavation. This improves the light-emitting reliability of the display panel while simplifying the display panel manufacturing process and increasing the display panel manufacturing efficiency.

[0094] In some embodiments, see Figure 6 The display panel further includes an encapsulation layer 70 disposed on a side of the light-emitting functional layer 30 facing away from the substrate 10. The encapsulation layer 70 includes a plurality of encapsulation portions 71 disposed corresponding to the opening structures 21. A gap J is provided between adjacent encapsulation portions 71, and the gap J is connected to the first stress release portion H1.

[0095] The encapsulation layer 70 is located on the side of the light-emitting functional layer 30 that is located behind the substrate 10. Furthermore, the encapsulation layer 70 is located on the side of the first electrode layer 50 that is away from the substrate 10. The encapsulation layer 70 is primarily used to protect components such as the light-emitting structure 31, thereby reducing the risk of water, oxygen, and the like invading the light-emitting structure 31 and improving the reliability of the display panel.

[0096] The encapsulation layer 70 includes a plurality of spaced-apart encapsulation portions 71, which are arranged correspondingly to the opening structures 21. The corresponding arrangement mentioned here means that the orthographic projection of the encapsulation portion 71 on the substrate 10 at least partially overlaps with the orthographic projection of the opening structure 21 on the substrate 10, and the encapsulation portion 71 is at least partially located within the opening structure 21. Because the encapsulation portion 71 and the light-emitting structure 31 are independently arranged corresponding to the opening structure 21, the encapsulation portion 71 can achieve independent encapsulation of different light-emitting structures 31, thereby improving encapsulation reliability.

[0097] Furthermore, a gap J exists between adjacent light-emitting structures 31. This gap J is located on the side of the first opening K facing away from the substrate 10, and is connected to the first stress relief portion H1. That is, the orthographic projection of the gap J on the substrate 10 at least partially overlaps with the orthographic projection of the first stress relief portion H1 on the substrate 10. This design can reduce the impact between adjacent encapsulation portions 71 when the display panel bends and deforms, lowering the risk of cracks in the encapsulation layer 70 due to bending, and improving encapsulation reliability. Optionally, the orthographic projection of the first stress relief portion H1 on the substrate 10 lies within the orthographic projection of the gap J on the substrate 10.

[0098] In some embodiments, see Figure 7 , the display panel further includes a flexible structure 80 disposed in the first stress release portion H1.

[0099] The flexible structure 80 includes a flexible material that can produce flexible deformation when subjected to force. In the embodiment of the present application, the flexible structure 80 is disposed within the first stress release portion H1, so that when the display panel bends, the flexible structure 80 can also be deformed. The flexible structure 80 can be in contact with the inner wall of the first stress release portion H1, or the flexible structure 80 can be not in contact with the interior of the first stress release portion H1. In other words, the deformation amount of the flexible structure 80 can be the same as or different from that of the first stress release portion H1, and the embodiment of the present application does not limit this.

[0100] In addition, during use of the display panel, the presence of the flexible structure 80 can play a certain supporting role, thereby reducing the occurrence of problems such as local depression of the display panel caused by the presence of the first stress release portion H1 of the display panel, and improving the reliability of the display panel.

[0101] It should be noted that when the display panel has both the first stress release portion H1 and the second stress release portion H2, the flexible structure 80 can be set only in the first stress release portion H1, or the flexible structure 80 can exist in both the first stress release portion H1 and the second stress release portion H2; similarly, when the display panel has both the first stress release portion H1 and the gap J, the flexible structure 80 can be set only in the first stress release portion H1, or the flexible structure 80 can exist in both the first stress release portion H1 and the gap J.

[0102] Optionally, see Figure 8 The flexible structure 80 is at least partially located in the gap J. Furthermore, the display panel simultaneously has a first stress release portion H1, a second stress release portion H2 and a gap J, and the flexible structure 80 is simultaneously arranged in the first stress release portion H1, the second stress release portion H2 and the gap J.

[0103] In some embodiments, the side of the flexible structure 80 facing away from the substrate 10 is flush with the side of the encapsulation portion 71 facing away from the substrate 10. This design allows the surface of the flexible structure 80 facing away from the substrate 10 and a portion of the structure of the surface of the encapsulation portion 71 facing away from the substrate 10 to be on the same plane, thereby reducing the difficulty of preparing subsequent film layers on the side of the encapsulation layer 70 facing away from the substrate 10.

[0104] In some embodiments, the flexible structure 80 comprises a light-blocking material.

[0105] As can be seen from the accompanying drawings, the first stress relief portion H1 can be located between adjacent light-emitting structures 31, and the flexible structure 80 can also be located between adjacent light-emitting structures 31. At least some of the adjacent light-emitting structures 31 can be used to emit light of different colors. Based on this, in the embodiment of the present application, the flexible structure 80 is configured to include a light-shielding material to reduce the risk of color mixing between the light emitted by adjacent light-emitting structures 31, thereby improving the display quality of the display panel.

[0106] In some embodiments, see Figure 1 and Figure 9 The display panel includes a main body portion B1 and a bending portion B2 that are adjacent to each other, and at least a portion of the first stress release portion H1 is disposed in the bending portion B2.

[0107] In an embodiment of the present application, the display panel may be a flexible display panel designed to meet bending requirements. At least a portion of the film layer in the substrate 10 may comprise a flexible material. The display panel includes a main body portion B1 and a bending portion B2. Typically, there are multiple main bodies B1, with the bending portions B2 located between adjacent main bodies B1. During use, the display panel can be transformed into different configurations by bending the bending portions B2 to meet different transportation and usage requirements.

[0108] During the display panel bending process, at the main body portion B1, the light-emitting structure 31 and the pixel definition layer 40 and other film structures are not subject to bending stress, or are subject to relatively small bending stress. However, at the bend portion B2, the light-emitting structure 31 and other film structures are subject to relatively large bending stress, which can easily lead to problems such as failure of the light-emitting structure 31.

[0109] In view of this, the embodiment of the present application sets at least part of the first stress release portion H1 at the bending portion B2, so that at the bending portion B2, the first stress release portion H1 can be used to reduce the deformation of at least part of the structure in the isolation structure 20, reduce the bending effect on the light-emitting structure 31 in the bending portion B2, and improve the light-emitting reliability.

[0110] It should be noted that in the embodiment of the present application, the number of first stress relief portions H1 may be one or more. When only one first stress relief portion H1 is provided, at least part of the first stress relief portion H1 must be located within the bend portion B2. When multiple first stress relief portions H1 are provided, at least part of the first stress relief portions H1 must be located within the bend portion B2.

[0111] In some embodiments, there may be multiple first stress release portions H1 , and the orthographic projection area of ​​a single first stress release portion H1 on the substrate 10 tends to gradually decrease in the direction from the bending portion B2 to the main body portion B1 .

[0112] As can be seen from the foregoing, during the bending of the display panel, the bend portion B2 is subjected to greater bending stress than the main body portion B1. Based on this, the embodiment of the present application adjusts the size of a single first stress relief portion H1 so that the orthographic projection of the first stress relief portion H1 within and around the bend portion B2 is larger on the substrate 10, while the orthographic projection of the first stress relief portion H1 farther from the bend portion B2 is smaller on the substrate 10. For example, if the first stress relief portion H1 is a circular hole, the hole diameter of the first stress relief portion H1 is larger the closer to the bend portion B2, and smaller the hole diameter of the first stress relief portion H1 farther from the bend portion B2.

[0113] This design allows the first stress relief portion H1 at and near the bend portion B2 to experience greater deformation under external forces, thereby meeting the bending requirements of the display panel, reducing the bending effects on film structures such as the light-emitting structure 31, and improving the reliability of the display panel. Similarly, in other embodiments, the depth of the first stress relief portion H1 gradually decreases from the bend portion B2 toward the main body portion B1.

[0114] Second, see Figure 10, an embodiment of the present application provides a display device, comprising the display panel in any of the aforementioned embodiments.

[0115] The display device provided in the embodiment of the present application has the beneficial effects of the display panel in any of the aforementioned embodiments. For details, please refer to the aforementioned description of the beneficial effects of the display panel, which will not be repeated in the embodiment of the present application.

[0116] Thirdly, please refer to Figure 11 12 , an embodiment of the present application provides a method for manufacturing a display panel, including:

[0117] S100: forming an isolation structure on one side of the substrate.

[0118] See also Figure 12a In step S100, an isolation structure 20 is formed on one side of the substrate 10 and encloses a plurality of opening structures 21. Exemplarily, the isolation structure 20 includes a first isolation portion 22 and a second isolation portion 23 that are stacked.

[0119] S110: removing a portion of the isolation structure so that a first stress release portion is provided in the isolation structure.

[0120] See also Figure 12b In step S110, a portion of the structure in the isolation structure 20 is removed from the side of the isolation structure 20 facing away from the substrate 10, so that the formed first stress relief portion H1 has a first opening K facing away from the substrate 10. The embodiment of the present application does not limit the size parameters of the first stress relief portion H1. For example, the first stress relief portion H1 can completely penetrate the isolation structure 20, or can only penetrate a portion of the structure in the isolation structure 20.

[0121] S120: forming a light-emitting functional layer on one side of the substrate.

[0122] See also Figure 12c In step S120 , the light emitting structure 31 in the light emitting functional layer 30 may be formed by evaporation or the like. There are multiple light emitting structures 31 , and the multiple light emitting structures 31 are respectively arranged corresponding to the opening structures 21 .

[0123] In the embodiment of the present application, the isolation structure 20 is hollowed out so that a larger deformation can be generated at the first stress release portion H1 during the bending process to meet the bending requirements. This can reduce the deformation corresponding to at least part of the structure in the isolation structure 20, thereby reducing the deformation effect of the isolation structure 20 on the light-emitting structure 31, thereby reducing the risk of display abnormalities in the light-emitting structure 31 due to bending deformation of the display panel and improving display reliability.

[0124] In some embodiments, see Figure 13As shown in FIG14 , before step S110, the method further includes:

[0125] S130: forming a pixel definition layer on one side of the substrate.

[0126] See also Figure 14a In step S130, the pixel definition layer 40 and the isolation structure 20 are formed on the same side of the substrate 10. The pixel definition layer 40 includes a pixel defining portion 41 and a pixel opening formed by the pixel defining portion 41. The isolation structure 20 is located on the side of the pixel defining portion 41 away from the substrate 10. The pixel opening is used to accommodate the light-emitting structure formed subsequently.

[0127] The present invention does not limit the order of preparing steps S130 and S110. For example, the pixel definition layer 40 may be formed first, and then the isolation structure 20 may be formed on the side of the pixel definition layer 40 facing away from the substrate 10. Alternatively, a full-surface pixel definition material layer may be formed first, and then the isolation structure 20 may be formed on the side of the pixel definition material layer facing away from the substrate 10. Finally, the pixel definition material layer may be patterned to form the pixel definition layer 40.

[0128] See also Figure 14b In step S110, a portion of the structure in the pixel defining portion 41 is simultaneously removed to form a second stress relief portion H2 in the pixel defining portion 41 that is connected to the first stress relief portion H1. In this case, the first stress relief portion H1 completely penetrates the isolation structure 20, while the second stress relief portion H2 can completely penetrate the pixel defining portion 41 or only penetrate a portion of the structure in the pixel defining portion 41, which is not limited in this embodiment of the present application.

[0129] In the embodiment of the present application, the provision of the second stress relief portion H2 reduces the deformation of at least a portion of the pixel defining portion 41 during the display panel bending process, thereby further reducing the impact of display panel deformation on the light-emitting structure 31. This reduces the risk of failure of the light-emitting structure 31 and improves the light-emitting reliability of the display panel. Furthermore, the simultaneous formation of the first stress relief portion H1 and the second stress relief portion H2 simplifies the display panel manufacturing process and improves display panel manufacturing efficiency.

[0130] In some embodiments, the preparation method further comprises:

[0131] S140: Filling the first stress release portion to form a flexible structure.

[0132] See also Figure 14cIn step S140, the presence of the flexible structure 80 can play a certain supporting role, thereby reducing the occurrence of problems such as local depression of the display panel caused by the presence of the first stress release portion H1 of the display panel, and improving the reliability of the display panel.

[0133] For the fourth aspect, please refer to Figure 15 16 , an embodiment of the present application provides a method for manufacturing a display panel, including:

[0134] S200: forming an isolation structure on one side of the substrate.

[0135] See also Figure 16a In step S200 , an isolation structure 20 is formed on one side of the substrate 10 and encloses a plurality of opening structures 21 .

[0136] S210: forming a light-emitting functional layer and an encapsulation layer in sequence on one side of the substrate.

[0137] See also Figure 16b In step S210, the light-emitting functional layer 30 includes a plurality of light-emitting structures 31 disposed corresponding to the opening structures 21, and the encapsulation layer 70 includes an encapsulation portion 71 disposed corresponding to the plurality of opening structures 21, with gaps J being provided between adjacent encapsulation portions 71. The light-emitting structures 31 in the light-emitting functional layer 30 are configured to provide light-emitting functions, and the encapsulation portions 71 in the encapsulation layer 70 are disposed corresponding to the light-emitting structures 31 to achieve independent encapsulation of the light-emitting structures 31.

[0138] S220: removing a portion of the isolation structure at a position corresponding to the gap, so that the isolation structure is provided with a first stress release portion communicating with the gap.

[0139] See also Figure 16c In step S220, the encapsulation portion 71 can be used as a shielding layer to remove the portion of the isolation structure 20 not covered by the encapsulation portion 71, namely, the portion of the isolation structure 20 corresponding to the gap J, thereby forming the first stress relief portion H1. This design allows the first stress relief portion H1 to be formed without adding additional film layers or using additional masks, thus simplifying the display panel manufacturing process.

[0140] Although the embodiments disclosed in this application are as described above, the contents described are merely embodiments adopted to facilitate understanding of this application and are not intended to limit the present invention. Any person skilled in the art to which this application belongs may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application. However, the scope of protection of this application shall still be based on the scope defined by the appended claims.

[0141] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the replacement of other connection methods described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the scope of protection of this application.

Claims

1. A display panel, characterized in that: include: substrate; An isolation structure is disposed on one side of the substrate and encloses a plurality of opening structures; A light-emitting functional layer is arranged on one side of the substrate, and the light-emitting functional layer includes a plurality of light-emitting structures arranged corresponding to the opening structures; The isolation structure is provided with a first stress release portion, the first stress release portion has a first opening portion away from the substrate, and the first stress release portion penetrates into at least a portion of the isolation structure along the thickness direction of the substrate.

2. The display panel according to claim 1, characterized in that: The isolation structure comprises a first isolation portion and a second isolation portion which are sequentially stacked in a direction away from the substrate, and the first stress release portion is at least located in the second isolation portion; Preferably, the first stress release portion passes through the second isolation portion; Preferably, the first stress release portion passes through the first isolation portion; Preferably, the display panel further comprises a first electrode layer arranged on a side of the light-emitting functional layer away from the substrate, and the first electrode layer comprises a plurality of first electrodes arranged at intervals; The first isolation portion includes a conductive material, and the first electrode overlaps the conductive material of the first isolation portion.

3. The display panel according to claim 2, characterized in that: It also includes a pixel definition layer disposed on one side of the substrate, the pixel definition layer includes a pixel definition portion and a pixel opening formed by the pixel definition portion, and the isolation structure is located on a side of the pixel definition portion away from the substrate; The pixel defining portion is provided with a second stress releasing portion, and the first stress releasing portion is connected to the second stress releasing portion; Preferably, an orthographic projection of the first stress release portion on the substrate coincides with an orthographic projection of the second stress release portion on the substrate.

4. The display panel according to claim 1, characterized in that: It also includes an encapsulation layer disposed on a side of the light-emitting functional layer away from the substrate, the encapsulation layer including a plurality of encapsulation portions disposed corresponding to the plurality of opening structures; A gap is provided between adjacent packaging parts, and the gap is connected to the first stress release part; Preferably, the orthographic projection of the first stress release portion on the substrate is located within the orthographic projection of the gap on the substrate.

5. The display panel according to claim 4, characterized in that: Also included is a flexible structure disposed within the first stress relief portion; Preferably, the flexible structure is at least partially located within the gap; Preferably, a side of the flexible structure facing away from the substrate is flush with a side of the packaging portion facing away from the substrate; Preferably, the flexible structure comprises a light-shielding material.

6. The display panel according to claim 1, characterized in that: The display panel comprises a main body portion and a bending portion which are adjacently arranged, and at least a part of the first stress release portion is arranged in the bending portion; Preferably, there are multiple first stress release portions, and in the direction from the bending portion to the main body portion, the orthographic projection area of ​​a single first stress release portion on the substrate tends to gradually decrease; Preferably, in a direction from the bending portion to the main body portion, the depth of the first stress release portion tends to gradually decrease.

7. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 6.

8. A method for preparing a display panel, characterized in that: include: An isolation structure is formed on one side of the substrate, wherein the isolation structure encloses a plurality of opening structures; Removing a portion of the isolation structure so that a first stress release portion is provided in the isolation structure, wherein the first stress release portion has a first opening portion facing away from a side of the substrate; A light-emitting functional layer is sequentially formed on one side of the substrate, wherein the light-emitting functional layer includes a plurality of light-emitting structures arranged corresponding to the opening structure.

9. The preparation method according to claim 8, characterized in that: Before removing part of the structure in the isolation structure, the method further includes: forming a pixel definition layer on one side of the substrate, the pixel definition layer comprising a pixel definition portion and a pixel opening formed by the pixel definition portion, and the isolation structure is located on a side of the pixel definition portion away from the substrate; The removing of a part of the structure in the isolation structure and the removing of a part of the structure in the pixel defining portion simultaneously form a second stress releasing portion in the pixel defining portion which is connected with the first stress releasing portion; Preferably, after removing part of the structure in the isolation structure, the method further comprises: A flexible structure is formed by filling the first stress release portion.

10. A method for preparing a display panel, characterized in that: include: An isolation structure is formed on one side of the substrate, wherein the isolation structure encloses a plurality of opening structures; A light-emitting functional layer and an encapsulation layer are sequentially formed on one side of the substrate, wherein the light-emitting functional layer includes a plurality of light-emitting structures arranged corresponding to the opening structures, and the encapsulation layer includes encapsulation parts arranged corresponding to the plurality of opening structures, and gaps are provided between adjacent encapsulation parts; A portion of the structure in the isolation structure at a position corresponding to the gap is removed so that the isolation structure is provided with a first stress release portion communicating with the gap.

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