Display device and its manufacturing method

Abstract

This application provides a display device and its manufacturing method. The display device includes a flexible display panel and a protective layer assembly. The flexible display panel includes a first flat area, a bending area, and a second flat area. The protective layer assembly includes a first protective layer and a second protective layer, wherein the elastic modulus of the first protective layer is greater than that of the second protective layer. This application ensures the protective effect on the panel by setting a double protective layer. Furthermore, the elastic modulus of the first protective layer is greater than that of the second protective layer, allowing for the formation of a stronger protective layer on the inner side, thereby enhancing the protective strength of the panel's bending area. The manufacturing method of this application can release stress during bonding, preventing cracks and forming a stronger protective layer after bonding.

Description

Technical Field

[0001] This application relates to the field of displays, and more particularly to a display device and a method for manufacturing it. Background Technology

[0002] For OLED display devices, UV sealing is performed on the panel bonding area to improve the strength of the bonding area.

[0003] In the current bonding process, the panel and the UV adhesive layer are bent together. In order to reduce bending stress and prevent cracks from forming at the top of the panel, the strength or elastic modulus of the UV adhesive cannot be too high. Therefore, the UV adhesive layer has limited protective effect on the bonding area. Summary of the Invention

[0004] This application provides a display device and a manufacturing method that can improve the protection effect on the bending area of ​​a flexible display panel.

[0005] In a first aspect, embodiments of this application provide a display device, including a flexible display panel and a protective layer assembly. The flexible display panel includes a first flat area, a bent area, and a second flat area. The first flat area and the second flat area are disposed opposite each other in a first direction. The bent area is located between the first flat area and the second flat area along a second direction. The first direction and the second direction intersect. The protective layer assembly includes a first protective layer and a second protective layer. The first protective layer is stacked on the bent area and is located outside the bent area. At least a portion of the second protective layer is stacked on the side of the first protective layer away from the bent area. The elastic modulus of the first protective layer is greater than the elastic modulus of the second protective layer.

[0006] Secondly, embodiments of this application provide a method for manufacturing a display device, including providing a flexible display panel, the flexible display panel including a first flat area, a bending area and a second flat area; disposing a first protective layer on the bending area, the first protective layer including a plurality of particles, each particle including a shell and a solidified substance disposed within the shell; disposing a second protective layer on the first protective layer; and executing preset conditions to destroy the shell of the particles and solidify the solidified substance in the particles to form a first filling portion.

[0007] The display device and manufacturing method of the present application embodiments have at least the following beneficial effects:

[0008] The protective layer group of the display device in this application includes a first protective layer and a second protective layer. This application ensures the protection effect of the panel by setting a double protective layer. The elastic modulus of the first protective layer is greater than that of the second protective layer, which can form a stronger protective layer on the inner side to improve the protection strength of the panel bending area. The second protective layer is set on the outer side of the first protective layer away from the bending area, which can provide protection for the first protective layer and the panel, thereby ensuring the display effect of the panel. In this application, by setting two protective layers with different elastic moduli, the elastic modulus of the outer second protective layer is less than that of the first protective layer, which can reduce the overall bending difficulty and provide a certain protection effect. The elastic modulus of the first protective layer is greater than that of the second protective layer, which can form a stronger first protective layer on the inner side after bending to ensure structural strength. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 These are schematic diagrams of display devices according to some embodiments of this application;

[0011] Figure 2 yes Figure 1 A schematic diagram at point A in the middle;

[0012] Figure 3 yes Figure 1 Another schematic diagram at point A in the middle;

[0013] Figure 4 These are schematic diagrams of display devices according to other embodiments of this application;

[0014] Figure 5 These are schematic diagrams of display devices according to some embodiments of this application;

[0015] Figure 6 yes Figure 5 A diagram showing the process before binding;

[0016] Figure 7 This is a schematic diagram of the flexible display panel before it is bonded, according to some embodiments of this application;

[0017] Figure 8 yes Figure 7 A schematic diagram at point B in the middle;

[0018] Figure 9 This is a flowchart of a method for manufacturing a display device according to some embodiments of this application;

[0019] Figure 10 This is a flowchart of a method for manufacturing a display device according to other embodiments of this application;

[0020] Figure 11 This is a flowchart of a method for manufacturing a display device according to some embodiments of this application;

[0021] The attached figures are labeled as follows:

[0022] 10. Flexible display panel; 11. First flat area; 12. Bending area; 13. Second flat area;

[0023] 20. Protective layer group; 21. First protective layer; 211. First filler; 212. Second filler; 213. Crack; 214. Particle; 215. Outer shell; 216. Solidified substance; 22. Second protective layer; 30. Structural layer; 30a. First surface of structural layer; 30b. Second surface of structural layer; 31. First protective film layer; 32. Buffer layer; 33. First adhesive tape layer; 34. Second protective film layer;

[0024] 40. Cover plate;

[0025] 50. Second tape layer;

[0026] 60. Polarizing film;

[0027] 70. Conductive adhesive layer. Detailed Implementation

[0028] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] In the manufacturing of OLED display devices, UV sealing is performed on the panel bonding area to improve the strength of the bonding area.

[0031] During the bonding process, the panel and the UV adhesive layer are bent together. In order to reduce bending stress and prevent cracks from forming at the top of the panel, the strength or elastic modulus of the UV adhesive cannot be too high. Therefore, the UV adhesive layer has limited protective effect on the bonding area.

[0032] This application provides a display device and a manufacturing method that can release bending stress and form a stronger protective layer, thereby improving structural strength and enhancing the protection of the panel.

[0033] like Figure 1 As shown, the display device of this application embodiment will be introduced first. The display device of this application embodiment includes a flexible display panel 10 and a protective layer group 20. The flexible display panel 10 includes a first flat area 11, a bending area 12 and a second flat area 13. The first flat area 11 and the second flat area 13 are arranged opposite to each other in a first direction. The bending area 12 is located between the first flat area 11 and the second flat area 13 along a second direction. The first direction and the second direction are intersected. The protective layer group 20 includes a first protective layer 21 and a second protective layer 22. The first protective layer 21 is stacked on the bending area 12 and is located outside the bending area 12. At least a portion of the second protective layer 22 is stacked on the side of the first protective layer 21 away from the bending area 12. The elastic modulus of the first protective layer 21 is greater than the elastic modulus of the second protective layer 22.

[0034] In some embodiments, the first direction and the second direction are arranged perpendicularly to each other; in other embodiments, the first direction is configured as the thickness direction of the display device.

[0035] In some embodiments, such as Figure 1As shown, the first protective layer 21 is disposed between the bending area 12 and the second protective layer 22 along the second direction. The first protective layer 21 being located outside the bending area 12 means that the first protective layer 21 is located on the side of the bending area 12 away from the first straight area 11 along the second direction.

[0036] In some embodiments, the first flat area 11 and / or the second flat area 13 of the flexible display panel 10 are configured as the display area of ​​the display device, and pixel units for display are provided on the first flat area 11 and / or the second flat area 13. In other embodiments, the second flat area 13 can be used to bond chips, circuit boards, etc.

[0037] The protective layer group of the display device in this application embodiment includes a first protective layer 21 and a second protective layer 22. This application embodiment uses a double protective layer to ensure the protection of the panel. The elastic modulus of the first protective layer 21 is greater than that of the second protective layer 22, allowing for the formation of a stronger protective layer on the inner side, thus enhancing the protection of the bending area 12. The second protective layer 22 is disposed on the outer side of the first protective layer 21, away from the bending area 12, providing protection for both the first protective layer 21 and the flexible display panel 10, thereby ensuring the display effect of the panel. In this application embodiment, two protective layers with different elastic moduli are used. The elastic modulus of the outer second protective layer 22 is less than that of the first protective layer 21, which reduces the overall bending difficulty while providing a certain level of protection. The elastic modulus of the first protective layer 21 is greater than that of the second protective layer 22, allowing for the formation of a stronger first protective layer 21 on the inner side after bending, thus ensuring structural strength.

[0038] like Figure 1 and Figure 2 As shown, the first protective layer 21 includes a plurality of first filling portions 211, and the elastic modulus of the first filling portions 211 is greater than that of the second protective layer 22.

[0039] In some embodiments, the elastic modulus of the first filling portion 211 is 1.01 to 3 times that of the elastic modulus of the second protective layer 22, and in other embodiments, the elastic modulus of the first filling portion 211 is 2 to 3 times that of the elastic modulus of the second protective layer 22.

[0040] In some embodiments, a plurality of first filling portions 211 are spaced apart. In other embodiments, the plurality of first filling portions 211 are interconnected to form a whole layer of first protective layer 21. The projection of the first protective layer 21 along the second direction completely covers the bending area 12 of the flexible display panel 10.

[0041] In this embodiment, by providing multiple first filler portions 211 with higher elastic modulus in the first protective layer 21, a stronger first protective layer 21 can be formed on the side near the bending area 12, resulting in better structural strength and protection. Furthermore, the first protective layer 21 formed by multiple first filler portions 211 can provide higher strength protection for the bending area 12 from multiple locations. In some actual production, different numbers or densities of first filler portions 211 can be provided for different locations in the bending area 12 to enhance the protection effect at a specified location. For example, for a target location on the bending area 12, more or denser first filler portions 211 can be provided than at other locations, thereby effectively improving the protection effect at that target location.

[0042] In some embodiments, such as Figure 2 As shown, the projection of a plurality of first filling portions 211 along the second direction onto the flexible display panel 10 covers at least one-tenth of the area of ​​the bending region 12.

[0043] In some embodiments, a plurality of first filling portions 211 are spaced apart, and the projected area of ​​all the first filling portions 211 along the second direction accounts for at least one-tenth of the area of ​​the bending region 12. For example, the projected area of ​​all the first filling portions 211 along the second direction accounts for at least one-fifth of the area of ​​the bending region 12. In other embodiments, the projected area of ​​all the first filling portions 211 along the second direction accounts for at least two-fifths of the area of ​​the bending region 12.

[0044] In this embodiment, by limiting the projection ratio of the first filling part 211 on the bending area 12, the first filling part 211 can cover a larger area of ​​the bending area 12, resulting in a stronger first protective layer 21 and better protection for the bending area 12. In this embodiment, the projection ratio of multiple first filling parts 211 on the bending area 12 can be set according to requirements, and the value of the projection ratio can be adjusted for different products or designs to meet production needs.

[0045] The projected area S1 of the single first filling portion 211 along the second direction on the flexible display panel 10 satisfies the condition that the area S2 of the bending region 12 satisfies the condition that the first filling portion 211 projects onto the flexible display panel 10 along the second direction.

[0046] The projected area of ​​a single first filling portion 211 along the second direction on the bending region 12 is S1, and the area of ​​the bending region 12 of the flexible display panel 10 is S2. In some embodiments,

[0047] In this embodiment, the area ratio of a single first filling part 211 to the bending area 12 is defined. The smaller first filling part 211 can provide higher strength protection for the bending area 12 at multiple locations. The first protective layer 21 formed by multiple smaller first filling parts 211 has higher strength and is easier to achieve in terms of manufacturing process. Furthermore, the size of the first filling part 211 is selected to facilitate the multiple first filling parts 211 to be dispersed as much as possible on the outside of the bending area, enabling multi-point reinforcement and multi-point protection.

[0048] like Figure 2 As shown, the first protective layer 21 also includes a second filling portion 212, and a plurality of first filling portions 211 are spaced apart, with the second filling portion 212 disposed between the plurality of first filling portions 211.

[0049] In some embodiments, the second filling portion 212 is disposed between two adjacent first filling portions 211. In other embodiments, a plurality of first filling portions 211 are embedded in the second filling portion 212, and the first filling portions 211 are located on the side of the second filling portion 212 close to the bending area 12 along the second direction.

[0050] like Figure 2 As shown, the first filling portion 211 and the second filling portion 212 are connected to each other to form a first protective layer 21. The projection of the first protective layer 21 in the second direction at least completely covers the bending area 12. In some embodiments, the first protective layer 21 has a planar structure and is fitted to one side of the bending area 12.

[0051] The first protective layer 21 in this embodiment includes a first filling portion 211 and a second filling portion 212. The first filling portion 211 serves as a reinforcing part, with a larger elastic modulus and higher strength, which makes the overall strength of the first protective layer 21 higher. The second filling portion 212 is disposed between the first filling portions 211, serving to connect the first filling portions 211. The first filling portion 211 and the second filling portion 212 in this embodiment can form a dense and high-strength first protective layer 21 on the inner side, thereby providing better protection for the bending area 12.

[0052] like Figure 3 As shown, the second filling part 212 is provided with a crack 213, and at least a portion of the first filling part 211 is provided in the crack 213.

[0053] In some embodiments, when the bending area 12, the first protective layer 21 and the second protective layer 22 are bent and bound, the second filling portion 212 of the first protective layer 21 forms a crack 213 due to bending, and at least a portion of the first filling portion 211 fills the crack 213.

[0054] In some embodiments, the portion of the first filling part 211 that fills the crack 213 is in close contact with the inner wall of the crack 213, thereby increasing the structural strength of the first protective layer 21.

[0055] In this embodiment of the application, by filling at least a portion of the first filling part 211 with the crack 213 in the second filling part 212, a dense first protective layer 21 can be formed, thereby improving the structural strength and protective effect. That is, in this embodiment of the application, the first filling part 211 can fill the crack 213 caused by bending, avoiding the occurrence of cracks in the protective layer group 2 after bending, which would cause a decrease in strength or water and oxygen intrusion and other adverse phenomena.

[0056] The material of the second protective layer 22 includes one or more of ultraviolet curable adhesive and thermosetting adhesive; the material of the first filler 211 includes one or more of ultraviolet curable adhesive and thermosetting adhesive; the material of the second filler 212 is the same as that of the second protective layer 22.

[0057] In some embodiments, the material of the second protective layer 22 includes UV-curable adhesive, the material of the first filler portion 211 includes UV-curable adhesive, and the material of the second filler portion 212 includes UV-curable adhesive.

[0058] In some embodiments, at least a portion of the second protective layer 22 is stacked along the second direction on the side of the first protective layer 21 away from the bending region 12. Specifically, at least a portion of the second protective layer 22 is stacked along the second direction on the side of the second filling portion 212 away from the bending region 12, and the thickness of the second protective layer 22 in the second direction is 2 to 6 times, for example, 3 times or 4 times, the thickness of the first protective layer 21.

[0059] In some embodiments, at least a portion of the second protective layer 22 extends along the second direction and is disposed on the first flat area 11 and the second flat area 13. In some embodiments, one side of the first protective layer 21 is disposed on the bending area 12, and the remaining sides of the first protective layer 21 are all wrapped by the second protective layer 22.

[0060] In this embodiment, the materials of the first protective layer 21 and the second protective layer 22 are readily available and the production cost is controllable. Furthermore, since the second protective layer 22 is coated and formed on the side of the second filling portion 212 away from the bending area 12, and the material of the second filling portion 212 is the same as that of the second protective layer 22, the bonding surface between the second filling portion 212 and the second protective layer 22 can be more uniform and the bonding strength is higher. Moreover, the second protective layer 22 can be prepared using the same material after the first protective layer 21 is prepared, which can simplify the manufacturing process.

[0061] like Figure 4As shown, the display device in this embodiment of the application further includes a structural layer 30, which is disposed between the first flat area 11 and the second flat area 13 along a first direction. The first flat area 11 is disposed on the first surface 30a of the structural layer, the second flat area 13 is disposed on the second surface 30b of the structural layer, and the bending area 12 is located on one side of the structural layer 30 along a second direction.

[0062] like Figure 5 As shown, the structural layer 30 includes a first protective film layer 31, a buffer layer 32, a first adhesive tape layer 33, and a second protective film layer 34, which are stacked sequentially along a first direction. The side of the first protective film layer 31 facing away from the buffer layer 32 along the first direction is configured as the first surface 30a of the structural layer, and the side of the second protective film layer 34 facing away from the first adhesive tape layer 33 along the first direction is configured as the second surface 30b of the structural layer.

[0063] like Figure 5 As shown, a first protective film layer 31 is stacked on the first flat area 11, a buffer layer 32 is stacked on the side of the first protective film layer 31 away from the first flat area 11, a first adhesive tape layer 33 is stacked on the side of the buffer layer 32 away from the first protective film layer 31, and a second protective film layer 34 is stacked on the side of the first adhesive tape layer 33 away from the buffer layer 32. The first adhesive tape layer 33 bonds the buffer layer 32 and the second protective film layer 34 along the first direction, thereby stabilizing the structure.

[0064] like Figure 6 As shown, before the display device is bonded, the first structural layer 30 is stacked on the first flat area 11, and the second structural layer 30 is stacked on the second flat area 13. The first structural layer 30 includes a first protective film layer 31, a buffer layer 32, and a first adhesive tape layer 33. Figure 6 (Not shown in the diagram), the second part of the structural layer 30 includes a second protective film layer 34.

[0065] like Figure 5 and Figure 6 As shown, in this embodiment, when the display device is bonded, the bending area 12 of the flexible display panel 10 and the protective layer group 20 are bent so that the first flat area 11 and the second flat area 13 are arranged in parallel, and the side of the second protective film layer 34 facing away from the second flat area 13 is connected to the side of the first tape layer 33 along the first direction.

[0066] In some embodiments, the bending region 12 of the flexible display panel 10 is located on one side of the structural layer 30 along the second direction.

[0067] The display device of this application embodiment is provided with a structural layer 30, which supports the first flat area 11 and the second flat area 13, and also plays a role in stabilizing the shape after binding. After bending, the first tape layer 33 bonds the buffer layer 32 and the second protective film layer 34 together, which enables the first flat area 11 and the second flat area 13 to maintain a relatively parallel state, thereby achieving structural stability. The buffer layer 32 of the structural layer 30 can buffer the force on the display device to ensure the normal operation of the display device.

[0068] like Figure 5 and Figure 6 As shown, the display device in this embodiment of the application further includes a cover plate 40, a second adhesive tape layer 50 (e.g., an OCA adhesive layer), a polarizer 60, and a conductive adhesive layer 70. The polarizer 60 is stacked on the side of the first flat region 11 facing away from the first protective film layer 31 along the first direction, and the side of the polarizer 60 along the second direction is attached to the sidewall of the second protective layer 22. The second adhesive tape layer 50 is stacked on the side of the polarizer 60 facing away from the first flat region 11 along the first direction, the cover plate 40 is stacked on the side of the second adhesive tape layer 50 facing away from the polarizer 60 along the first direction, and the conductive adhesive layer 70 is stacked on the side of the second flat region 13 facing away from the second protective film layer 34 along the first direction. At least a portion of the conductive adhesive layer 70 overlaps the outside of the second protective layer 22.

[0069] See Figures 7 to 9 This application also provides a method for manufacturing a display device, comprising:

[0070] Step S100: As Figure 7 As shown, a flexible display panel 10 is provided. The flexible display panel 10 includes a first flat area 11, a bending area 12, and a second flat area 13. The bending area 12 of the flexible display panel 10 is connected to the first flat area 11 and the second flat area 13 respectively.

[0071] Step S200: As Figure 8 As shown, a first protective layer 21 is provided on the bending area 12. The first protective layer 21 includes a plurality of particles 214. Each particle 214 includes a shell 215 and a solidified substance 216 disposed within the shell 215. The solidified substance 216 of the particles 214 can be used to solidify and form a first filling part 211.

[0072] Step S300: Deposit a second protective layer 22 on the first protective layer 21;

[0073] Step S400: Execute preset conditions to destroy the outer shell 215 of particle 214, and solidify the solidified substance 216 in particle 214 to form a first filling part 211. Specifically: after the outer shell 215 of particle 214 breaks, the solidified substance 216 has fluidity for a certain period of time, and the solidified substance 216 can flow and fill the voids and cracks 213 to form the first filling part 211 (e.g., Figure 3 (As shown).

[0074] In the preparation method of this application embodiment, by setting multiple particles 214 on the bending area 12, when the preset conditions are executed, the outer shell 215 of the particles 214 is destroyed to release stress and prevent cracks from forming at the arc top of the flexible display panel 10. After the outer shell 215 of the particles 214 is destroyed, the solidified substance 216 inside the outer shell 215 flows out and fills the gap and solidifies to form a first filling part 211. The first filling part 21 formed by multiple particles is combined to form a first protective layer 21 with higher strength, which can improve the structural strength.

[0075] In some embodiments, the shell 215 of the particle 214 is made of one or more of polyester resin, polyimide, and polyvinyl chloride.

[0076] In some embodiments, the curing substance 216 includes one or more of UV-curable adhesives and thermosetting adhesives.

[0077] The preset conditions include one or more of light, heat, or applied force.

[0078] In some embodiments, after a force is applied, the outer shell 215 of the particle 214 is subjected to the force, which causes the outer shell 215 of the particle 214 to break.

[0079] In some embodiments, after the particle 214 is exposed to light, the outer shell 215 of the particle 214 is irradiated by light (e.g., UV light) and melts or is destroyed.

[0080] In some embodiments, after the particle 214 is heated, the outer shell 215 of the particle 214 melts and releases the solidified substance 216 inside the outer shell 215.

[0081] In some embodiments, light can be applied after applying force, or heat can be applied after applying force, or both light and heat can be applied after applying force.

[0082] In this embodiment, executing preset conditions can destroy the outer shell 215 of the particle 214 to release stress and cause the solidified substance 216 inside the outer shell 215 to flow out. The solidified substance 216 can form a first filling part 211 with a higher elastic modulus, thereby making the first protective layer 21 inside the bending area 12 stronger. The preset conditions include one or more of light, heating or applied force, which can make all particles 214 completely break under the action of multiple combinations, achieving a better stress release effect and obtaining a high-strength first protective layer 21.

[0083] The applied force in the preset conditions is specifically: bending the bending area 12, the first protective layer 21 and the second protective layer 22 so that the outer shell 215 of the particle 214 is subjected to the applied force and breaks, and the solidified material 216 inside the outer shell 215 flows out and solidifies to form the first filling part 211.

[0084] In some embodiments, the bending area 12, the first protective layer 21 and the second protective layer 22 are bent together, thereby exerting a force on the outer shell 215 of the particle 214. The outer shell 215 of the particle 214 breaks after being subjected to the force, thereby releasing the stress generated by bending.

[0085] In this embodiment, a force can be applied to the outer shell 215 of the particle 214 during bending and binding, causing the outer shell 215 of the particle 214 to break. This can release the stress during the binding process in a timely manner, preventing cracks from forming. Furthermore, stress is released and a high-strength first protective layer 21 is formed during the binding process. The manufacturing process is simple and requires no other processes or equipment; it can be operated according to the normal bending process.

[0086] See Figure 10 The present application discloses a method for manufacturing a display device, comprising:

[0087] Step S100: Provide a flexible display panel 10, which includes a first flat area 11, a bending area 12, and a second flat area 13; the bending area 12 of the flexible display panel 10 is connected to the first flat area 11 and the second flat area 13 respectively.

[0088] Step S200: Set a first protective layer 21 on the bending area 12;

[0089] Step S300: Deposit a second protective layer 22 on the first protective layer 21;

[0090] Step S310: A first part of the structural layer 30 is provided on the first flat area 11, and a second part of the structural layer 30 is provided on the second flat area 13. The first part of the structural layer 30 includes a first protective film layer 31, a buffer layer 32 and a first adhesive tape layer 33, and the second part of the structural layer 30 includes a second protective film layer 34.

[0091] Step S410: Execute preset conditions to destroy the outer shell 215 of the particle 214, and solidify the solidified substance 216 in the particle 214 to form the first filling part 211. Specifically, bend the bending area 12, the first protective layer 21 and the second protective layer 22 so that the outer shell 215 of the particle 214 is subjected to force and breaks, and the solidified substance 216 in the outer shell 215 flows out and solidifies to form the first filling part 211.

[0092] See Figure 11 The present application discloses a method for manufacturing a display device, comprising:

[0093] Step S100: Provide a flexible display panel 10, which includes a first flat area 11, a bending area 12, and a second flat area 13; the bending area 12 of the flexible display panel 10 is connected to the first flat area 11 and the second flat area 13 respectively.

[0094] Step S210: A first protective layer 21 is formed on the bending area 12. Specifically, an adhesive liquid doped with multiple particles 214 is applied to the bending area 12. The cured substance 216 in the particles 214 is used to form a first filling part 211, and the adhesive liquid is used to form a second filling part 212. The first protective layer 21 is formed by connecting the first filling part 211 and the second filling part 212. The doping concentration of the particles 214 is 2.5% ± 0.5%. In some embodiments, the doping concentration of the particles 214 is 2.5% ± 1%. In some embodiments, adhesive liquids with different particle 214 doping concentrations can be applied to different positions on the bending area 12 according to different needs.

[0095] Step S300: A second protective layer 22 is formed on the first protective layer 21. Specifically, a UV adhesive liquid without particles 214 is coated on the first protective layer 21 to form the second protective layer 22.

[0096] Step S310: A first structural layer 30 is provided on the first flat area 11, and a second structural layer 30 is provided on the second flat area 13; the first structural layer 30 includes a first protective film layer 31, a buffer layer 32 and a first adhesive tape layer 33, and the second structural layer 30 includes a second protective film layer 34.

[0097] Step S410: Execute preset conditions to destroy the outer shell 215 of the particle 214, and solidify the solidified substance 216 in the particle 214 to form the first filling part 211. Specifically, bend the bending area 12, the first protective layer 21 and the second protective layer 22 so that the outer shell 215 of the particle 214 is subjected to force and breaks, and the solidified substance 216 in the outer shell 215 flows out and solidifies to form the first filling part 211.

[0098] In this embodiment, particles 214 are coated onto the bending area 12 by means of coating, which is a simple manufacturing process. In the preparation of the second protective layer 22, it is only necessary to continue coating the UV adhesive without particles 214 to form the second protective layer 22, which is simple and quick. In addition, during bending and binding, multiple particles 214 are subjected to the stress generated by bending, which causes the outer shell 215 of the particles 214 to be squeezed and thus achieve the effect of stress release. Furthermore, the solidified material 216 inside the particles 214 can fill the space originally occupied by the outer shell 215 and the cracks 213 generated by the first protective layer 21 during bending, so that a stronger first protective layer 21 can be formed on the side near the bending area 12 after bending, thereby improving the protective effect. In addition, in this embodiment, the stronger first protective layer 21 is formed after bending, which will not cause a large bending stress.

[0099] The above description is merely a specific implementation of this application. 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 this application 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 this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A display device, characterized in that, include: A flexible display panel includes a first flat area, a bent area, and a second flat area. The first flat area and the second flat area are disposed opposite to each other in a first direction. The bent area is located between the first flat area and the second flat area along a second direction. The first direction and the second direction intersect. A protective layer group includes a first protective layer and a second protective layer. The first protective layer is stacked on the bending region and is located outside the bending region. At least a portion of the second protective layer is stacked on the side of the first protective layer away from the bending region. The elastic modulus of the first protective layer is greater than that of the second protective layer. The first protective layer includes multiple particles, each particle having a shell and a solidified substance disposed within the shell. After a preset condition is executed, the shell of the particle is destroyed, and the solidified substance in the particle solidifies to form a first filling part.

2. The display device according to claim 1, characterized in that, The first protective layer includes a plurality of first filling portions, wherein the elastic modulus of the first filling portions is greater than that of the second protective layer.

3. The display device according to claim 2, characterized in that, The projection of the plurality of the first filling portions onto the flexible display panel along the second direction covers at least one-tenth of the area of ​​the bending region.

4. The display device according to claim 1, characterized in that, The projected area S1 of the first filling portion along the second direction on the flexible display panel satisfies the following condition:

5. The display device according to any one of claims 2-4, characterized in that, The first protective layer further includes a second filling portion, and a plurality of first filling portions are spaced apart, with the second filling portion disposed between the plurality of first filling portions.

6. The display device according to claim 5, characterized in that, The second filling portion is provided with a slit, and at least a portion of the first filling portion is disposed within the slit.

7. The display device according to claim 5, characterized in that, The material of the second protective layer includes one or more of UV-curable adhesive and thermosetting adhesive; the material of the first filler includes one or more of UV-curable adhesive and thermosetting adhesive; the material of the second filler is the same as the material of the second protective layer.

8. The display device according to claim 1, characterized in that, It also includes a structural layer, which is disposed between the first straight area and the second straight area along a first direction. The first straight area is disposed on the first surface of the structural layer, the second straight area is disposed on the second surface of the structural layer, and the bending area is located on one side of the structural layer along a second direction.

9. A method for manufacturing a display device, characterized in that, include: A flexible display panel is provided, the flexible display panel including a first flat area, a bending area and a second flat area; A first protective layer is provided on the bending area. The first protective layer includes multiple particles, each particle including a shell and a solidified substance disposed within the shell. A second protective layer is provided on top of the first protective layer; The preset conditions are executed, which destroys the outer shell of the particle and solidifies the solidified material inside the particle to form the first filling part.

10. The preparation method according to claim 9, characterized in that, The preset conditions include one or more of light, heating, or applied force.

11. The preparation method according to claim 10, characterized in that, The applied force includes bending the bending area, the first protective layer, and the second protective layer so that the outer shell of the particle is subjected to the applied force and breaks, and the solidified material inside the outer shell flows out and solidifies to form the first filling part.

12. The preparation method according to any one of claims 9-11, characterized in that, A liquid adhesive containing multiple particles is applied to the bending area to form a first protective layer.

Images