Flexible display module and display device

Abstract

The application discloses a flexible display module and a display device. The flexible display module comprises a supporting assembly, a display panel and a cover plate. The display panel is located on one side of the supporting assembly. The cover plate is located on the side of the display panel away from the supporting assembly. The cover plate comprises a substrate layer and a hardening layer. The hardening layer is located on the side of the substrate layer away from the supporting assembly. The elastic modulus of the substrate layer is E1, and E1 is greater than or equal to 7 Gpa. According to the embodiments provided in the application, the flexible display module and the display device improve the wear resistance of the flexible display module.

Description

Technical Field

[0001] This application relates to the field of display modules, specifically to a flexible display module and a display device. Background Technology

[0002] Electronic devices with flexible display modules offer a large display area when unfolded and occupy less storage space when folded, leading to their increasingly widespread application. However, in related technologies, the steel wool used in flexible display modules has an abrasion resistance of ≤300 cycles. This poor abrasion resistance makes the surface of the flexible display module prone to wear, resulting in a decrease in display quality. Summary of the Invention

[0003] This application provides a flexible display module and a display device, with the aim of improving the wear resistance of the flexible display module.

[0004] An embodiment of the first aspect of this application provides a flexible display module, the flexible display module comprising:

[0005] Support components;

[0006] The display panel is located on one side of the supporting components;

[0007] The cover plate is located on the side of the display panel away from the support assembly. The cover plate includes a substrate layer and a hardening layer. The hardening layer is located on the side of the substrate layer away from the support assembly. The elastic modulus of the substrate layer is E1, where E1 ≥ 7 GPa.

[0008] According to an embodiment of the first aspect of this application, the hardened layer comprises at least 30% resin by weight percentage.

[0009] According to an embodiment of the first aspect of this application, the material for preparing the hardened layer includes acrylate, wherein the functionality of the acrylate is ≥6.

[0010] According to an embodiment of the first aspect of this application, the material for preparing the hardened layer also includes nano-inorganic particles.

[0011] According to the embodiments of the first aspect of this application, the nano-inorganic particles are one or more of silicon oxide, silicon nitride, aluminum oxide, aluminum nitride, and silicon carbide.

[0012] According to an embodiment of the first aspect of this application, the water droplet angle of the hardened layer away from the surface of the display panel is θ, where θ ≥ 110°.

[0013] According to an embodiment of the first aspect of this application, the flexible display module further includes:

[0014] An optical adhesive layer is located between the cover plate and the display panel. The thickness of the optical adhesive layer is H, with a thickness of 25μm≤H≤50μm.

[0015] According to the first aspect of this application, the room temperature modulus of the optical adhesive layer is greater than or equal to 35 kPa.

[0016] According to the embodiment of the first aspect of this application, the high temperature modulus of the optical adhesive layer is greater than or equal to 20 kPa.

[0017] According to an embodiment of the first aspect of this application, the flexible display module further includes:

[0018] A filter layer is located between the cover plate and the display panel. The filter layer includes multiple filter parts, and the orthographic projection of the filter parts on the support assembly at least partially overlaps with the orthographic projection of the light-emitting device of the display panel on the support assembly.

[0019] The filter layer also includes light-blocking sections, which are located between adjacent filter sections.

[0020] According to an embodiment of the first aspect of this application, the support component includes a first support layer, an adhesive layer, and a second support layer, wherein the adhesive layer bonds the first support layer and the second support layer.

[0021] According to an embodiment of the first aspect of this application, the first support layer is a metal layer.

[0022] According to an embodiment of the first aspect of this application, the adhesive layer is a double-sided adhesive layer.

[0023] An embodiment of the second aspect of this application also provides a display device, including:

[0024] The flexible display module provided in any of the embodiments of the first aspect described above.

[0025] In the flexible display module and display device provided in the embodiments of this application, a hardening layer is provided on one side of the substrate layer to improve the surface hardness of the cover plate and reduce the generation of scratches; by setting the elastic modulus of the substrate layer to E1≥7Gpa, the substrate layer is not easily worn by external forces, maintaining the appearance and optical performance of the cover plate and improving the wear resistance of the flexible display panel. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0027] Figure 1 This is a cross-sectional structural schematic diagram of the flexible display module provided in the first aspect embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the flexible display module provided in the first aspect embodiment of this application in its unfolded state;

[0029] Figure 3 The flexible display module provided in the first aspect of this application is in a bent state;

[0030] Figure 4 The flexible display module provided in the first aspect embodiment of this application is in the unrolled state;

[0031] Figure 5 The flexible display module provided in the first aspect embodiment of this application is in the rolled-up state;

[0032] Figure 6 This is a cross-sectional structural diagram of the flexible display module provided in the first aspect embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Supporting component; 11. First supporting layer; 12. Adhesive layer; 13. Second supporting layer; 2. Display panel; 3. Cover plate; 31. Substrate layer; 32. Hardening layer; 4. Optical adhesive layer; 5. Filter layer; 51. Filter part; 52. Light blocking part;

[0035] X, thickness direction. Detailed Implementation

[0036] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0037] 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.

[0038] 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.

[0039] Electronic devices with flexible display modules offer a large display area when unfolded and occupy less storage space when folded, leading to their increasingly widespread application. However, in related technologies, the steel wool used in flexible display modules has an abrasion resistance of ≤300 cycles. This poor abrasion resistance makes the surface of the flexible display module prone to wear, resulting in a decrease in display quality.

[0040] Existing solutions cannot adequately address the technical problems. To resolve these issues, this application provides a flexible display module and a display device. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the flexible display module and the display device.

[0041] Please see Figure 1 A flexible display module includes a support component 1, a display panel 2, and a cover plate 3. The display panel 2 is located on one side of the support component 1. The cover plate 3 is located on the side of the display panel 2 away from the support component 1. The cover plate 3 includes a substrate layer 31 and a hardening layer 32. The hardening layer 32 is located on the side of the substrate layer 31 away from the support component 1. The elastic modulus of the substrate layer 31 is E1, where E1 ≥ 7 GPa.

[0042] Flexible display modules can be used to display images, and they can be bent. Please refer to [link / reference]. Figure 2 and Figure 3 In some embodiments, the flexible display module has a folded state and a flat state. When the display device is folded, the bent display area 101 of the flexible display module is at least partially bent into an arc shape. The non-bent display areas 102 connected to the bent display area 101 in the flexible display module can be stacked, thereby reducing the volume of the flexible display module. When the bent display area 101 is unfolded, the bent display area 101 and the non-bent display areas 102 connected to the bent display area 101 can be flattened and displayed together. Please refer to [link / reference]. Figure 4 and Figure 5 In some embodiments, the flexible display module 100 has a wound state and a flat state. A portion of the flexible display module 100 can be wound onto the reel 200, thereby reducing the volume of the flexible display module. The reel 200 can also unwrap the flexible display module 100, thereby increasing the displayable volume of the flexible display module 100.

[0043] Please see Figure 1The display panel 2 includes a flexible substrate, a light-emitting device layer 21, and a driving circuit layer. The flexible substrate is made of flexible materials such as polyimide (PI). The light-emitting device layer 21 includes a pixel definition layer and multiple light-emitting devices 21. The pixel definition layer includes multiple pixel openings, and at least a portion of the light-emitting devices 21 is disposed in the pixel openings. Exemplarily, in this embodiment, organic light-emitting diodes (OLEDs) can be selected to fabricate the various light-emitting devices 21. Alternatively, the light-emitting devices 21 can be configured as micro light-emitting diodes (Micro-LEDs) or quantum light-emitting diodes (QLEDs). The driving circuit layer may include multiple sub-pixel control units for controlling whether the light-emitting devices 21 emit light and the duration of light emission. The driving circuit layer may include a gate metal layer, a source / drain metal layer, an active layer, etc. The display panel 2 in this embodiment may also include an encapsulation layer, a planarization layer, etc., which will not be described in detail here.

[0044] The flexible substrate is a flexible thin film and cannot stably support the various structural layers. These structural layers can be structures disposed on the flexible substrate in the display panel 2, such as the driving circuit layer and the light-emitting device layer 21, or they can be structures disposed on the display panel 2, such as the cover plate 3. The support component 1 can support the display panel 2. The support component 1 is not easily deformed when subjected to force, which can well ensure the bending shape of the flexible display module and further reinforce the structure of the flexible display module.

[0045] A cover plate 3 is disposed on one side of the display panel 2. The cover plate 3 protects the display panel 2 from damage caused by external forces. The cover plate 3 also prevents external impurities such as dust and moisture from entering the interior of the display panel 2. The cover plate 3 includes a substrate layer 31 and a hardening layer 32, with the hardening layer 32 formed on the substrate layer 31. The substrate layer 31 may include light-transmitting and bendable materials such as polyimide (PI) or ultra-thin glass (UTG). The hardening layer 32 may be light-transmitting and bendable materials such as acrylate or siloxane. Compared to the substrate layer 31, the hardening layer 32 has greater hardness, which improves the surface hardness of the cover plate 3, reduces scratches, and maintains the appearance and optical performance of the cover plate 3. Both the substrate layer 31 and the hardening layer 32 can be bent to accommodate the bending of the flexible display module.

[0046] The elastic modulus is an indicator of a material's resistance to elastic deformation. A higher elastic modulus indicates greater material rigidity. Under the same external force, the substrate layer 31 with a higher elastic modulus undergoes less elastic deformation. A higher elastic modulus also indicates higher material hardness. When subjected to the same external force for scratching, the substrate layer 31 with a higher elastic modulus can better resist the localized deformation caused by the scratch, making the cover plate 3 less susceptible to wear.

[0047] In this embodiment, a hardening layer 32 is provided on one side of the substrate layer 31 to improve the surface hardness of the cover plate 3 and reduce the generation of scratches; by setting the elastic modulus E1 of the substrate layer 31 to be ≥7Gpa, the substrate layer 31 is not easily worn by external forces, maintaining the appearance and optical performance of the cover plate 3 and improving the wear resistance of the flexible display panel 2.

[0048] In some embodiments, the hardened layer 32 comprises at least 30% resin by weight.

[0049] The resin can be synthesized by polymerization and cross-linking reactions of multiple monomers. The rigid structure in the resin can increase the hardness of the hardened layer 32. By setting the hardened layer 32 to include more than 30% resin, the hardness of the hardened layer 32 is increased by giving it a more rigid resin structure.

[0050] In some embodiments, the material used to prepare the hardened layer 32 includes acrylate, wherein the acrylate has a functionality of ≥6.

[0051] Acrylic esters can be obtained through polyurethane modification. Optionally, the functionality of the acrylate is 6, 9, 12, etc. An acrylate with a functionality ≥6 possesses high functionality. A three-dimensional network structure is formed by cross-linking the acrylate monomers, thereby generating an acrylic resin. The network structure in the acrylic resin gives it high hardness and good abrasion resistance. The highly cross-linked acrylic resin can effectively resist the erosion of chemical substances, allowing the cover plate to exhibit good stability when in contact with chemical organic solvents, acid and alkali solutions, etc. The hardened layer 32 prepared from the high-functionality acrylate exhibits good weather resistance. The network structure in the acrylate resin also reduces light scattering, thereby improving the transparency of the hardened layer 32.

[0052] Optionally, the acrylate is selected from one or more of aliphatic polyurethane acrylates, polyether polyurethane acrylates, polyester acrylates, fluorinated modified polyurethane acrylates, and epoxy modified polyurethane acrylates.

[0053] In some embodiments, the material used to prepare the hardened layer 32 further includes nano-inorganic particles.

[0054] Nano-inorganic particles are inorganic particles with a particle size in the nanometer range. Nano-inorganic particles have high hardness, which can improve the wear resistance of the hardened layer 32.

[0055] In some embodiments, the nano-inorganic particles are one or more selected from silicon oxide, silicon nitride, aluminum oxide, aluminum nitride, and silicon carbide. Preferably, the nano-inorganic particles are SiO2. More preferably, the nano-inorganic particles are Al2O3.

[0056] In some embodiments, the water droplet angle of the hardened layer 32 away from the surface of the display panel 2 is θ, where θ ≥ 110°.

[0057] The water droplet angle refers to the angle formed between the edge of a water droplet and the solid surface when the water droplet comes into contact with the solid surface. The larger the water droplet angle of the hardened layer 32 away from the surface of the display panel 2, the stronger the hydrophobicity of the hardened layer 32 away from the surface of the display panel 2.

[0058] The surface of the hardened layer 32 facing away from the display panel 2 can be treated by, for example, by modifying it with low surface energy materials, creating micron-level grooves, increasing the water droplet angle θ to ≥110°, reducing the adhesion of liquid dirt to the surface, preventing moisture from remaining for extended periods, and protecting the electronic components inside the flexible display module from damage by a humid environment. Optionally, the water droplet angle θ can be 110°, 120°, 130°, etc.

[0059] In some embodiments, the flexible display module further includes an optical adhesive layer 4, which is located between the cover plate 3 and the display panel 2, and the thickness of the optical adhesive layer 4 is H, 25μm≤H≤50μm.

[0060] The optical adhesive layer 4 bonds the cover plate 3 and the display panel 2 together, preventing delamination or displacement between them. The optical adhesive layer 4 also provides cushioning, dispersing external forces on the cover plate 3. Furthermore, the optical adhesive layer 4 has high light transmittance, allowing light emitted from the display panel 2 to pass through it and escape. In some embodiments, the optical adhesive layer 4 is a transparent optical adhesive (OCA).

[0061] The thicker the optical adhesive layer 4 (H), the better its cushioning effect. When the flexible display panel 2 is bent, the optical adhesive layer 4 is deformed by the pressure of the bent cover plate 3. The thicker the optical adhesive layer 4 (H), the greater the deformation caused by pressure, the greater the friction on the surface of the cover plate 3, and the lower the wear resistance of the cover plate 3. Conversely, the thinner the optical adhesive layer 4 (H), the smaller the deformation caused by pressure, the less friction on the surface of the cover plate 3, and the higher the wear resistance of the cover plate 3. A thickness of 25μm < H < 50μm is set to ensure that the optical adhesive layer 4 can stably bond the cover plate 3 and the display panel 2, and to minimize the deformation caused by pressure, thus improving the wear resistance of the cover plate 3. Optionally, H can be 25μm, 30μm, 40μm, 45μm, 50μm, etc.

[0062] In some embodiments, the room temperature modulus E2 of the optical adhesive layer 4 is greater than or equal to 35 kPa.

[0063] In some embodiments, the high temperature modulus E3 of the optical adhesive layer 4 is greater than or equal to 20 kPa.

[0064] Low-temperature modulus refers to the modulus of a material at a lower temperature. High-temperature modulus refers to the modulus of a material at a higher temperature. The terms "lower temperature" and "higher temperature" are relative and do not represent the actual measured temperature. The temperature corresponding to the low-temperature modulus is lower than the temperature corresponding to the high-temperature modulus. Optionally, the low-temperature modulus is the modulus of the material at 25°C, and the high-temperature modulus is the modulus of the material at 60°C.

[0065] Increasing the modulus of the optical adhesive layer 4 is beneficial to improving the wear resistance of the flexible display module. Optionally, the room temperature modulus E2 is 35 kPa, 36 kPa, 38 kPa, 40 kPa, etc. Optionally, the high temperature modulus E3 is 20 kPa, 23 kPa, 25 kPa, 28 kPa, etc.

[0066] Please see Figure 6 In some embodiments, the flexible display module further includes a filter layer 5, which is located between the cover plate 3 and the display panel 2. The filter layer 5 includes a plurality of filter parts 51, and the orthographic projection of the filter parts 51 on the support component 1 at least partially overlaps with the orthographic projection of the light-emitting device 21 of the display panel 2 on the support component 1.

[0067] The multiple light-emitting devices 21 can be light-emitting devices 21 capable of emitting light of different colors. For example, they can be red light-emitting devices 21 capable of emitting red light, green light-emitting devices 21 capable of emitting green light, and blue light-emitting devices 21 capable of emitting blue light. The filter sections 51 corresponding to the light-emitting devices 21 emitting different colors of light are different. For example, the filter section 51 corresponding to the light-emitting device 21 emitting red light can transmit red light and block light of other colors except red light. The filter section 51 corresponding to the light-emitting device 21 emitting green light can transmit green light and block light of other colors except green light. The filter section 51 corresponding to the light-emitting device 21 emitting blue light can transmit blue light and block light of other colors except blue light.

[0068] By setting the filter layer 51, external light can be effectively prevented from entering the display panel 2, and color shift problems of various colors of light at wide viewing angles can also be reduced. The filter layer 5 can be a COE (Color filter on encapsulation) structure. Compared with setting a polarizer (POL) on one side of the display panel 2 for filtering, the filter layer 5 can eliminate the step of composite material of each layer in the polarizer, so that the filter layer 5 has a smaller thickness than the polarizer.

[0069] When the flexible display module is in a folded or rolled-up state, the adhesive on the polarizer will increase the deformation of the flexible display module under stress, resulting in increased friction on the cover plate 3, which is detrimental to improving the wear resistance of the flexible display module. The filter layer 5 eliminates the need for an adhesive layer, thereby improving the wear resistance of the flexible display module.

[0070] In some embodiments, the filter layer 5 further includes a light blocking portion 52, which is located between adjacent filter portions 51.

[0071] The light-blocking part 52 is made of an opaque material. By providing the light-blocking part 52, the mixing of different colors of light in the flexible display module can be reduced. Optionally, the orthographic projection of the light-blocking part 52 on the support assembly 1 does not overlap with the orthographic projection of the light-emitting device 21 of the display panel 2 on the support assembly 1.

[0072] In some embodiments, the support component 1 includes a first support layer 11, an adhesive layer 12, and a second support layer 13, wherein the adhesive layer 12 adheres to the first support layer 11 and the second support layer 13.

[0073] The support component 1 can be composed of multiple layers. The first support component 1 is disposed on the side of the second support component 1 that faces away from the flexible display module. When the flexible display module is in a folded or rolled-up state, the first support layer 11, the adhesive layer 12, and the second support layer 13 are bent together. The first support layer 11 and the second support layer 13 can structurally reinforce the flexible display module and ensure the bending shape of the flexible display module.

[0074] In some embodiments, the first support layer 11 is a metal layer.

[0075] The first support layer 11 can be a rigid material such as stainless steel (e.g., SUS) or titanium. Rigid materials have high modulus and are not easily deformed under stress, which can well ensure the bending shape of the flexible display module and further reinforce the structure of the flexible display module. Optionally, the second support layer 13 is a barrier protection film (BPF).

[0076] In some embodiments, the adhesive layer 12 is a double-sided adhesive layer.

[0077] When the flexible display module is in a bent or rolled-up state, the double-sided adhesive layer has less extrusion deformation compared to an adhesive layer that is coated on the first support layer 11 and then cured, which is beneficial to improving the wear resistance of the flexible display module.

[0078] In some embodiments, the flexible display module further includes a pressure-sensitive adhesive layer. Applying pressure to the pressure-sensitive adhesive layer causes it to become adhesive. Therefore, when the flexible display module needs to be bent or folded, the cohesive strength of the pressure-sensitive adhesive layer ensures that it will not tear due to stretching, thereby maintaining the structural integrity of the flexible display module.

[0079] To verify the effects achievable by the above embodiments, the following embodiments and comparative examples are provided for illustration:

[0080] Set up experimental groups 1 to 7. In each of the experimental groups 1 to 7, a new functional layer is added to the later experimental groups compared to the earlier experimental groups.

[0081] In Experiment 1, a PSA layer, a substrate layer, and a hardening layer were stacked sequentially.

[0082] Experimental group 2 consisted of PSA, optical adhesive layer, substrate layer and hardening layer stacked sequentially;

[0083] Experimental group 3 consisted of PSA, optical adhesive layer, polarizer layer, substrate layer and hardening layer stacked sequentially;

[0084] Experimental group 4 consisted of PSA, display panel, polarizer layer, optical adhesive layer, substrate layer and hardening layer stacked sequentially.

[0085] Experimental group 5 consists of PSA, second support layer, display panel, polarizer layer, optical adhesive layer, substrate layer and hardening layer stacked in sequence;

[0086] Experimental group 6 consists of PSA, double-sided adhesive layer, second support layer, display panel, polarizer layer, optical adhesive layer, substrate layer and hardening layer stacked in sequence;

[0087] Experimental group 7 consists of PSA, first support component, double-sided adhesive layer, second support layer, display panel, polarizer layer, optical adhesive layer, substrate layer and hardening layer stacked in sequence.

[0088]

[0089] Simulation force analysis was performed on experimental groups 1 to 7, and the deformation and friction were measured. The results are shown in Table 1. The newly added functional layer is the functional layer added in the later experimental group relative to the earlier experimental group. The change in deformation is the difference between the deformation of the later experimental group and the deformation of the earlier experimental group. The change in friction is the difference between the friction of the later experimental group and the friction of the earlier experimental group.

[0090] As shown in Table 1, the number of superimposed functional layers is basically positively correlated with the surface friction of the cover plate. The increase in the thickness of the functional layer prepared with adhesive material leads to a significant increase in the surface friction of the cover plate, which exacerbates the wear failure of the cover plate.

[0091] The addition of optical adhesive layer and double-sided adhesive layer significantly improves the surface friction of the cover plate, which has a significant impact on the wear resistance of the flexible display module.

[0092] The addition of a polarizing layer and a second support component improves the friction of the cover plate surface, but has a secondary impact on the wear resistance of the flexible display module.

[0093] The addition of the display panel and the first support component has no significant impact on the wear resistance of the flexible display module.

[0094] The multi-layered structure of Experiment 1 can be regarded as a cover plate, and the multi-layered structure of Experiment 7 can be regarded as a display module using a polarizer. From the friction force detected in Experiment 1 and Experiment 7, it can be seen that the friction force of the display module using a polarizer is about 10 times that of a single cover plate. This indicates that by adjusting the modulus of each layer in the flexible display module, the friction force on the cover plate surface can be affected, thereby improving the wear resistance of the cover plate set in the flexible display module.

[0095] The flexible display module provided in this application was subjected to a steel wool abrasion test, and the steel wool abrasion resistance was ≥2500 times.

[0096] The embodiments described above are not exhaustive and do not limit the invention to specific examples. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A flexible display module, characterized in that, The flexible display module includes: Support components; The display panel is located on one side of the support component; A cover plate is located on the side of the display panel away from the support assembly. The cover plate includes a substrate layer and a hardening layer. The hardening layer is located on the side of the substrate layer away from the support assembly. The elastic modulus of the substrate layer is E1, where E1 ≥ 7 GPa.

2. The flexible display module according to claim 1, characterized in that, The hardened layer comprises at least 30% resin by weight percentage.

3. The flexible display module according to claim 2, characterized in that, The material used to prepare the hardened layer includes acrylate, wherein the acrylate has a functionality of ≥6.

4. The flexible display module according to claim 3, characterized in that, The material used to prepare the hardened layer also includes nano-inorganic particles; Preferably, the nano-inorganic particles are one or more of silicon oxide, silicon nitride, aluminum oxide, aluminum nitride, and silicon carbide.

5. The flexible display module according to claim 1, characterized in that, The angle of the water droplet on the surface of the hardened layer away from the display panel is θ, where θ ≥ 110°.

6. The flexible display module according to claim 1, characterized in that, The flexible display module also includes: An optical adhesive layer is located between the cover plate and the display panel, and the thickness of the optical adhesive layer is H, 25μm≤H≤50μm; Preferably, the room temperature modulus of the optical adhesive layer is greater than or equal to 35 kPa; Preferably, the high-temperature modulus of the optical adhesive layer is greater than or equal to 20 kPa.

7. The flexible display module according to claim 1, characterized in that, The flexible display module also includes: A filter layer is located between the cover plate and the display panel. The filter layer includes a plurality of filter parts, and the orthographic projection of the filter parts on the support assembly at least partially overlaps with the orthographic projection of the light-emitting device of the display panel on the support assembly. The filter layer further includes light blocking portions, which are located between adjacent filter portions.

8. The flexible display module according to claim 1, characterized in that, The support assembly includes a first support layer, an adhesive layer, and a second support layer, wherein the adhesive layer bonds the first support layer and the second support layer. Preferably, the first support layer is a metal layer.

9. The flexible display module according to claim 8, characterized in that, The adhesive layer is a double-sided adhesive layer.

10. A display device, characterized in that, include: The flexible display module as described in any one of claims 1-9.

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