Display panel, display panel manufacturing method and rollable display device

Abstract

This invention discloses a display panel, a method for manufacturing the display panel, and a rollable display device. The display panel includes a light-emitting layer and an encapsulation layer disposed on the light-emitting side of the light-emitting layer. The encapsulation layer includes a first organic encapsulation layer and a second organic encapsulation layer stacked along the thickness direction of the display panel. The opposing surfaces of the first and second organic encapsulation layers each have staggered protrusions, and the first and second organic encapsulation layers are interlocked through these protrusions. When the display panel is bent or flexed, the protrusions of the first and second organic encapsulation layers deform and interact under external force, thereby mitigating the curling stress caused by bending or flexing the display panel, preventing problems such as encapsulation layer breakage, and improving the reliability of the display panel encapsulation.

Description

Technical Field

[0001] This invention belongs to the field of electronic product technology, and particularly relates to a display panel, a method for preparing the display panel, and a rollable display device. Background Technology

[0002] With the gradual development of electronic technology, people have increasingly higher demands for the foldability of electronic devices such as mobile phones and computers. For mobile terminals such as mobile phones, smartwatches, and smart bracelets, increasing the size of the display panel can improve the display effect and bring users a better visual experience. However, increasing the size of the display panel will lead to an increase in the space occupied by the mobile terminal, which is not only inconvenient to carry or wear, but also affects the aesthetics of the product.

[0003] To address this issue, a flexible display panel was designed. Users can roll and fold the panel as needed to reduce its size and improve portability. Alternatively, the flexible display can be unfolded to achieve a larger display screen. However, due to limitations of existing display panel films, the encapsulation film is prone to breakage during rolling, affecting the panel's lifespan.

[0004] Therefore, there is an urgent need for a new display panel, a display panel manufacturing method, and a rollable display device. Summary of the Invention

[0005] This invention provides a display panel, a method for manufacturing the display panel, and a rollable display device. When the display panel is bent or flexed, the protrusions of the first organic encapsulation layer and the second organic encapsulation layer deform and interact with each other under external force to alleviate the curling stress caused by bending or flexing the display panel, avoid problems such as breakage of the encapsulation layer, and improve the reliability of the display panel encapsulation.

[0006] One embodiment of the present invention provides a display panel, including: a light-emitting layer; and an encapsulation layer disposed on the light-emitting side of the light-emitting layer. The encapsulation layer includes a first organic encapsulation layer and a second organic encapsulation layer stacked along the thickness direction of the display panel. The second organic encapsulation layer is located on the side of the first organic encapsulation layer away from the light-emitting layer. The opposing surfaces of the first organic encapsulation layer and the second organic encapsulation layer are respectively provided with staggered protrusions. The first organic encapsulation layer and the second organic encapsulation layer are fitted together through the protrusions.

[0007] According to one aspect of the present invention, the deformation properties of the first organic encapsulation layer are greater than those of the second organic encapsulation layer; or, the deformation properties of the first organic encapsulation layer are less than those of the second organic encapsulation layer.

[0008] According to one aspect of the present invention, the protrusion includes a first protrusion disposed on the first organic encapsulation layer and a second protrusion disposed on the second organic encapsulation layer, a first groove corresponding to the second protrusion is provided between adjacent first protrusions, and a second groove corresponding to the first protrusion is provided between adjacent second protrusions; the lengths of the first protrusion and the second protrusion along the thickness direction of the display panel are 1 μm to 3 μm.

[0009] According to one aspect of the invention, the cross-sectional area of ​​the first protrusion gradually decreases in the direction from the first organic encapsulation layer to the second organic encapsulation layer; and / or, the cross-sectional area of ​​the second protrusion gradually decreases in the direction from the second organic encapsulation layer to the first organic encapsulation layer; preferably, both the first protrusion and the second protrusion are trapezoidal or triangular or curved-edge patterns including at least one curved edge.

[0010] According to one aspect of the present invention, the encapsulation layer further includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, wherein the first inorganic encapsulation layer is disposed between the first organic encapsulation layer and the light-emitting layer, and the second inorganic encapsulation layer is disposed on the side of the second organic encapsulation layer opposite to the light-emitting layer.

[0011] According to one aspect of the present invention, a first adhesive layer is further provided between the first inorganic encapsulation layer and the first organic encapsulation layer; and / or, a second adhesive layer is further provided between the second inorganic encapsulation layer and the second organic encapsulation layer.

[0012] According to one aspect of the present invention, the thickness of the first inorganic encapsulation layer and the second inorganic encapsulation layer is 0.5 μm to 1 μm; and / or, the thickness of the first adhesive layer and the second adhesive layer is 1.5 μm to 2.5 μm; and / or, the thickness of the first organic encapsulation layer and the second organic encapsulation layer is 3.5 μm to 4.5 μm.

[0013] Another aspect of the present invention provides a method for manufacturing a display panel, comprising the following steps: providing a light-emitting layer; forming an encapsulation layer on the light-emitting side of the light-emitting layer, the encapsulation layer comprising a first organic encapsulation layer and a second organic encapsulation layer stacked along the thickness direction of the display panel, wherein the first organic encapsulation layer and the second organic encapsulation layer respectively form staggered protrusions on opposite sides of their surfaces, and the first organic encapsulation layer and the second organic encapsulation layer are fitted together through the protrusions.

[0014] According to another aspect of the present invention, the step of forming an encapsulation layer on the light-emitting side of the light-emitting layer includes: forming a first organic encapsulation material layer on the light-emitting side of the light-emitting layer; pressing the surface of the first organic encapsulation material layer away from the light-emitting layer using a pressing member having a third protrusion to form the first organic encapsulation layer having a first protrusion; forming a second organic encapsulation layer on the side of the first organic encapsulation layer away from the light-emitting layer, the second organic encapsulation layer having a second protrusion that engages with the first protrusion.

[0015] Another aspect of the present invention provides a rollable display device, comprising: the display panel described in any of the above embodiments.

[0016] Compared with the prior art, the display panel provided in this embodiment of the invention includes a light-emitting layer and an encapsulation layer. The first and second organic encapsulation layers of the encapsulation layer each have staggered protrusions on their opposite surfaces. This allows the protrusions of the first and second organic encapsulation layers to interlock, effectively increasing the contact area between them and thus increasing the deformable space of the protrusions. When the display panel is bent or flexed, the protrusions of the first and second organic encapsulation layers deform and interact under external force, mitigating the curling stress caused by bending or flexing the display panel, preventing problems such as encapsulation layer breakage, and improving the reliability of the display panel encapsulation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a film layer structure diagram of a display panel provided in one embodiment of the present invention;

[0019] Figure 2 This is a film layer structure diagram of a display panel provided in another embodiment of the present invention;

[0020] Figure 3 This is a flowchart of a display panel manufacturing method provided in one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure during the manufacturing process of a display panel according to an embodiment of the present invention;

[0022] Figure 5This is a schematic diagram of the structure during the manufacturing process of a display panel according to another embodiment of the present invention;

[0023] Figure 6 This is a structural schematic diagram of the display panel manufacturing process provided in another embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure during the manufacturing process of a display panel according to another embodiment of the present invention.

[0025] In the attached image:

[0026] 1-Light-emitting layer; 2-Encapsulation layer; 21-First organic encapsulation layer; 22-Second organic encapsulation layer; 23-First inorganic encapsulation layer; 24-Second inorganic encapsulation layer; 25-First adhesive layer; 26-Second adhesive layer; 3-Substrate; 4-Pressed component; T-Protrusion; T1-First protrusion; T2-Second protrusion; T3-Third protrusion. Detailed Implementation

[0027] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention 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 the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0028] 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 said element.

[0029] 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.

[0030] Various modifications and variations can be made to this invention without departing from its spirit or scope, as will be apparent to those skilled in the art. Therefore, this invention is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this invention can be combined with each other without contradiction.

[0031] This invention provides a display panel, a method for manufacturing the display panel, and a rollable display device. The following description will be provided in conjunction with the accompanying drawings. Figures 1 to 7 Various embodiments of the display panel, the method for manufacturing the display panel, and the rollable display device are described.

[0032] Please see Figure 1 The display panel provided in this embodiment of the invention includes: a light-emitting layer 1; and an encapsulation layer 2 disposed on the light-emitting side of the light-emitting layer 1. The encapsulation layer 2 includes a first organic encapsulation layer 21 and a second organic encapsulation layer 22 stacked along the thickness direction of the display panel. The second organic encapsulation layer 22 is located on the side of the first organic encapsulation layer 21 away from the light-emitting layer 1. The surfaces of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 on opposite sides are respectively provided with staggered protrusions T. The first organic encapsulation layer 21 and the second organic encapsulation layer 22 are fitted together through the protrusions T.

[0033] The display panel provided in this embodiment of the invention includes a light-emitting layer 1 and an encapsulation layer 2. The first organic encapsulation layer 21 and the second organic encapsulation layer 2 have staggered protrusions T on opposite surfaces. This means the protrusions T of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 can interlock, effectively increasing the contact area between the two layers and thus increasing the deformable space of the protrusions T. Specifically, when the display panel is bent or flexed, the protrusions T of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 deform and interact under external force, mitigating the curling stress caused by bending or flexing the display panel, preventing breakage of the encapsulation layer 2, and improving the reliability of the display panel encapsulation.

[0034] In this embodiment, the light-emitting layer 1 of the display panel is the film layer used for light emission display. The structure of the light-emitting layer 1 varies depending on the type of display panel. Specifically, the display panel provided in this embodiment can be an organic light-emitting diode (OLED) display panel, a liquid crystal panel, or a miniature flat panel display panel (Mini-LED or Micro-LED), etc.

[0035] Both the first organic encapsulation layer 21 and the second organic encapsulation layer 22 are made of organic materials. The main advantage of using organic materials to prepare the first organic encapsulation layer 21 and the second organic encapsulation layer 22 is that they have better flatness, which allows for planarization and facilitates the subsequent growth of inorganic films using methods such as chemical vapor deposition, physical vapor deposition, or atomic layer deposition. Furthermore, organic materials can be used to prepare thicker organic materials using existing processes, and they also exhibit good bending resistance. Optionally, both the first organic encapsulation layer 21 and the second organic encapsulation layer 22 can be made of organic resins, such as acrylates.

[0036] Optionally, the display panel also includes a substrate 3, which is disposed on the side of the light-emitting layer 1 away from the encapsulation layer 2. The substrate 3 may be a flexible substrate, and the flexible substrate may be made of PI (Polyimide). The substrate 3 is used to support the film layer devices thereon.

[0037] In some optional embodiments, the deformation properties of the first organic encapsulation layer 21 are greater than those of the second organic encapsulation layer 22; or, the deformation properties of the first organic encapsulation layer 21 are less than those of the second organic encapsulation layer 22.

[0038] It should be noted that the deformation properties of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 are different, which will cause the first organic encapsulation layer 21 and the second organic encapsulation layer 22 to deform to different degrees when the display panel is bent or flexed. This will result in deformation separation between the protrusions T of the first organic encapsulation layer 21 and the second organic encapsulation layer 22, so as to generate a certain deformation space between the first organic encapsulation layer 21 and the second organic encapsulation layer 22 to fully release the curling stress.

[0039] Specifically, the deformation properties of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 can be adjusted by using materials with different cohesion values. Cohesion value, also known as adhesion, is the mutual attraction between adjacent parts within the same substance. This mutual attraction is a manifestation of the molecular forces between molecules of the same substance. For example, if the cohesion value of the material used in the first organic encapsulation layer 21 is less than that of the material used in the second organic encapsulation layer 22, the deformation properties of the first organic encapsulation layer 21 can be greater than those of the second organic encapsulation layer 22.

[0040] In some optional embodiments, the protrusion T includes a first protrusion T1 disposed on the first organic encapsulation layer 21 and a second protrusion T2 disposed on the second organic encapsulation layer 22. There is a first groove corresponding to the second protrusion T2 between adjacent first protrusions T1 and between adjacent second protrusions T2. There is a second groove corresponding to the first protrusion T1 between adjacent second protrusions T2. The length of the first protrusion T1 and the second protrusion T2 along the thickness direction of the display panel is 1μm to 3μm.

[0041] It is understood that the first protrusion T1 of the first organic encapsulation layer 21 extends from the first organic encapsulation layer 21 towards the second organic encapsulation layer 22, while the second protrusion T2 of the second organic encapsulation layer 22 extends from the second organic encapsulation layer 22 towards the first organic encapsulation layer 21. The first protrusion T1 extends into the second groove between adjacent second protrusions T2, and the second protrusion T2 extends into the first groove between adjacent first protrusions T1, thereby achieving mutual interlocking between the first organic encapsulation layer 21 and the second organic encapsulation layer 22. To ensure the interlocking effect, specifically, the length of the first protrusion T1 and the second protrusion T2 along the thickness direction of the display panel is 2μm.

[0042] Please see Figure 1 and Figure 2 To improve the fitting effect of the first protrusion T1 and the second protrusion T2, in some optional embodiments, the cross-sectional area of ​​the first protrusion T1 gradually decreases in the direction from the first organic encapsulation layer 21 to the second organic encapsulation layer 22; and / or, the cross-sectional area of ​​the second protrusion T2 gradually decreases in the direction from the second organic encapsulation layer 22 to the first organic encapsulation layer 21. Specifically, the first protrusion T1 and the second protrusion T2 are fitted and overlapped in a sawtooth structure to avoid relative displacement between the first organic encapsulation layer 21 and the second organic encapsulation layer 22 in the plane parallel to the substrate 3, thereby improving the reliability of the encapsulation.

[0043] Optionally, both the first protrusion T1 and the second protrusion T2 are trapezoidal, triangular, or curved shapes including at least one curved edge. Specifically, the first protrusion T1 and the second protrusion T2 can be trapezoidal in shape with rounded corners on each side. The angle and radius of the rounded corners are not particularly limited and can be selected according to actual needs. Using rounded corners or curved chamfers can effectively reduce burrs and other problems generated during manufacturing, and can reduce the risk of damage to the corners of the first protrusion T1 and the second protrusion T2 when the display panel is bent or folded.

[0044] To ensure the encapsulation effect of the encapsulation layer 2, in some optional embodiments, the encapsulation layer 2 further includes a first inorganic encapsulation layer 23 and a second inorganic encapsulation layer 24. The first inorganic encapsulation layer 23 is disposed between the first organic encapsulation layer 21 and the light-emitting layer 1, and the second inorganic encapsulation layer 24 is disposed on the side of the second organic encapsulation layer 22 away from the light-emitting layer 1.

[0045] It should be noted that the first inorganic encapsulation layer 23 and the second inorganic encapsulation layer 24 can specifically be made of inorganic materials such as silicon oxide, silicon nitride, aluminum oxide, and titanium oxide. Among them, silicon nitride and aluminum oxide have better refractive indices (density) than silicon oxide and titanium oxide, therefore, silicon nitride and aluminum oxide have better water and oxygen barrier properties than silicon oxide and titanium oxide. Of course, the materials of the first inorganic encapsulation layer 23 and the second inorganic encapsulation layer 24 are not limited to the above embodiments, and other materials with good water and oxygen barrier properties can also be used.

[0046] Please continue reading. Figure 1 and Figure 2 In this embodiment, the encapsulation layer 2 specifically includes a first inorganic encapsulation layer 23, a first organic encapsulation layer 21, a second organic encapsulation layer 22, and a second inorganic encapsulation layer 24 stacked sequentially. That is, the encapsulation layer 2 adopts the form of TFE (Thin-Film Encapsulation), and the display panel is encapsulated by the combination of organic encapsulation materials and inorganic encapsulation materials.

[0047] Please see Figure 2 To prevent the separation of the various film layers of the encapsulation layer 2 due to large differences in cohesion when the display panel is rolled to a small radius, in some optional embodiments, a first adhesive layer 25 is provided between the first inorganic encapsulation layer 23 and the first organic encapsulation layer 21; and / or, a second adhesive layer 26 is provided between the second inorganic encapsulation layer 24 and the second organic encapsulation layer 22.

[0048] Understandably, the first adhesive layer 25 effectively bonds the first inorganic encapsulation layer 23 and the first organic encapsulation layer 21, improving their bonding strength. Similarly, the second adhesive layer 26 also improves the bonding strength of the second inorganic encapsulation layer 24 and the second organic encapsulation layer 22. Furthermore, to ensure the light transmittance of the display panel, both the first and second adhesive layers 25 and 26 are made of adhesives with high light transmittance. For example, the first and second adhesive layers 25 can be made of PSA (pressure sensitive adhesive).

[0049] Due to the limitations of the overall thickness of the display panel, the overall thickness of the encapsulation layer 2 should not be too large. In some optional embodiments, the thickness of the first inorganic encapsulation layer 23 and the second inorganic encapsulation layer 24 is 0.5μm to 1μm; and / or, the thickness of the first adhesive layer 25 and the second adhesive layer 26 is 1.5μm to 2.5μm; and / or, the thickness of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 is 3.5μm to 4.5μm.

[0050] Specifically, the thickness of the first inorganic encapsulation layer 23 and the second inorganic encapsulation layer 24 is 1 μm, the thickness of the first adhesive layer 25 and the second adhesive layer 26 is 2 μm, and the thickness of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 is 4 μm. Therefore, the overall thickness of the encapsulation layer 2 is 14 μm, which meets the TFE design thickness requirements. Of course, the thickness of each film layer of the encapsulation layer 2 is not limited to the values ​​in the above embodiment and can be adjusted according to actual needs.

[0051] Please see Figure 3 This invention also provides a method for manufacturing a display panel, comprising the following steps:

[0052] S110: Provides light-emitting layer 1, such as Figure 4 As shown;

[0053] S120: An encapsulation layer 2 is formed on the light-emitting side of the light-emitting layer 1. The encapsulation layer 2 includes a first organic encapsulation layer 21 and a second organic encapsulation layer 22 stacked along the thickness direction of the display panel. The second organic encapsulation layer is located on the side of the first organic encapsulation layer away from the light-emitting layer. Alternating protrusions T are formed on the opposite surfaces of the first organic encapsulation layer 21 and the second organic encapsulation layer 22. The first organic encapsulation layer 21 and the second organic encapsulation layer 22 are fitted together through the protrusions T. Figure 1 As shown.

[0054] The display panel manufacturing method provided in this embodiment of the invention forms staggered protrusions T on opposite surfaces of the first organic encapsulation layer 21 and the second organic encapsulation layer 22, respectively. This allows the protrusions T of the first and second organic encapsulation layers 21 and 22 to interlock, thereby achieving the connection between the first and second organic encapsulation layers 21 and 22. When the display panel is bent or flexed, the protrusions T of the first and second organic encapsulation layers 21 and 22 deform and interact under external force, thus mitigating the curling stress caused by bending or flexing the display panel and preventing problems such as breakage of the encapsulation layer 2, thereby improving the reliability of the display panel encapsulation.

[0055] In step S110, depending on the type of display panel, the light-emitting layer 1 can be an OLED light-emitting layer 1 or a Micro-LED light-emitting layer 1, etc.

[0056] In step S120, staggered protrusions T can be formed on opposite sides of the first organic encapsulation layer 21 and the second organic encapsulation layer 22 by means of etching or jig processing.

[0057] In some optional embodiments, the step of forming the encapsulation layer 2 on the light-emitting side of the light-emitting layer 1 includes: forming a first organic encapsulation material layer on the light-emitting side of the light-emitting layer 1, such as... Figure 5 As shown; the first organic encapsulation material layer on the side away from the light-emitting layer 1 is pressed together by the pressing member 4 having the third protrusion T3 to form the first organic encapsulation layer 21 having the first protrusion T1, as shown. Figure 6 As shown; a second organic encapsulation layer 22 is formed on the side of the first organic encapsulation layer 21 opposite to the light-emitting layer 1. The second organic encapsulation layer 22 has a second protrusion T2 that engages with the first protrusion T1, as shown. Figure 7 As shown.

[0058] It is understandable that the third protrusion T3 and the second protrusion T2 of the press-fit part 4 have the same shape and size, so that the third protrusion T3 presses out the first groove on the first organic encapsulation material layer, and the first protrusion T1 is formed between the adjacent first grooves. Then, the second organic encapsulation layer 22 is coated on the side of the first organic encapsulation layer 21 away from the light-emitting layer 1. The part of the second organic encapsulation layer 22 that fills the first groove is the second protrusion T2 formed. The preparation process is simple and easy to operate.

[0059] This invention also provides a rollable display device, including: the display panel in any of the above embodiments.

[0060] The rollable display device provided in this embodiment of the invention has the technical effects of the display panel in any of the above embodiments. Explanations of structures and terms identical or corresponding to those in the above embodiments will not be repeated here. The rollable display device provided in this embodiment of the invention can be applied to mobile phones, or to any electronic product with display functionality, including but not limited to the following categories: televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, automotive displays, medical devices, industrial control equipment, touch interactive terminals, etc. This embodiment of the invention does not impose any special limitations on these categories.

[0061] The above are merely specific embodiments of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

[0062] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

Claims

1. A display panel, characterized in that, include: Emissive layer; An encapsulation layer is disposed on the light-emitting side of the light-emitting layer. The encapsulation layer includes a first organic encapsulation layer and a second organic encapsulation layer stacked along the thickness direction of the display panel. The second organic encapsulation layer is located on the side of the first organic encapsulation layer away from the light-emitting layer. The opposing surfaces of the first organic encapsulation layer and the second organic encapsulation layer are respectively provided with staggered protrusions. The first organic encapsulation layer and the second organic encapsulation layer are fitted together through the protrusions. The protrusions include a first protrusion on the first organic encapsulation layer and a second protrusion on the second organic encapsulation layer. There is a first groove corresponding to the second protrusion between adjacent first protrusions, and there is a second groove corresponding to the first protrusion between adjacent second protrusions. The lengths of the first protrusion and the second protrusion along the thickness direction of the display panel are 1 μm to 3 μm; The deformation properties of the first organic encapsulation layer are greater than those of the second organic encapsulation layer. Alternatively, the deformation properties of the first organic encapsulation layer are less than those of the second organic encapsulation layer.

2. The display panel according to claim 1, characterized in that, In the direction from the first organic encapsulation layer to the second organic encapsulation layer, the cross-sectional area of ​​the first protrusion gradually decreases; and / or, In the direction from the second organic encapsulation layer to the first organic encapsulation layer, the cross-sectional area of ​​the second protrusion gradually decreases.

3. The display panel according to claim 2, characterized in that, Both the first protrusion and the second protrusion are trapezoidal or triangular or curved shapes including at least one curved edge.

4. The display panel according to claim 1, characterized in that, The encapsulation layer further includes a first inorganic encapsulation layer and a second inorganic encapsulation layer. The first inorganic encapsulation layer is disposed between the first organic encapsulation layer and the light-emitting layer, and the second inorganic encapsulation layer is disposed on the side of the second organic encapsulation layer opposite to the light-emitting layer.

5. The display panel according to claim 4, characterized in that, A first adhesive layer is further provided between the first inorganic encapsulation layer and the first organic encapsulation layer; and / or, A second adhesive layer is also provided between the second inorganic encapsulation layer and the second organic encapsulation layer.

6. The display panel according to claim 5, characterized in that, The thicknesses of the first inorganic encapsulation layer and the second inorganic encapsulation layer are 0.5 μm to 1 μm; and / or, The thicknesses of the first adhesive layer and the second adhesive layer are 1.5 μm to 2.5 μm; and / or, The thickness of the first organic encapsulation layer and the second organic encapsulation layer is 3.5 μm to 4.5 μm.

7. A method for manufacturing a display panel, characterized in that, The method for preparing the display panel according to any one of claims 1 to 6 comprises the following steps: Provide a light-emitting layer; An encapsulation layer is formed on the light-emitting side of the light-emitting layer. The encapsulation layer includes a first organic encapsulation layer and a second organic encapsulation layer stacked along the thickness direction of the display panel. The opposing surfaces of the first organic encapsulation layer and the second organic encapsulation layer are respectively provided with staggered protrusions. The first organic encapsulation layer and the second organic encapsulation layer are fitted together through the protrusions. The deformation performance of the first organic encapsulation layer is greater than that of the second organic encapsulation layer, or the deformation performance of the first organic encapsulation layer is less than that of the second organic encapsulation layer.

8. The method for manufacturing a display panel according to claim 7, characterized in that, The step of forming an encapsulation layer on the light-emitting side of the light-emitting layer includes: A first organic encapsulation material layer is formed on the light-emitting side of the light-emitting layer; The first organic encapsulation material layer is pressed against the surface of the light-emitting layer away from the first light-emitting layer by a pressing member having a third protrusion, so as to form the first organic encapsulation layer having a first protrusion. A second organic encapsulation layer is formed on the side of the first organic encapsulation layer opposite to the light-emitting layer, and the second organic encapsulation layer has a second protrusion that interlocks with the first protrusion.

9. A rollable display device, characterized in that, include: The display panel according to any one of claims 1 to 6.

Images