Folding display module and display device

Abstract

The invention relates to a folding display module and a display device.The folding display module comprises a display panel, a polaroid and a hardened coating, the polaroid is arranged on the light emitting side of the display panel, the side edge of the polaroid is arranged in an inwards-shrinking mode relative to the side edge of the display panel, and the hardened coating is arranged on the side edge of the polaroid in the direction away from the display panel; the polaroid at least comprises a polarization layer, a protection layer and a hardening layer which are arranged in a stacked mode, the hardening coating is arranged on the light emitting side of the display panel and at least wraps the peripheral side face of the polaroid, and the edge of the hardening coating is flush with the edge of the display panel; wherein the hardened coating and the hardened layer are separately arranged; according to the folding display module, on the basis that the extrusion resistance of the edge of the folding display module is improved, water vapor can be prevented from invading from the peripheral side face of the polaroid, so that the polaroid is prevented from being eroded by sweat, and the problem that the edge of the polaroid fades due to sweat erosion is solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a foldable display module and a display device. Background Art

[0002] When using mobile devices, sweat from the palms can easily invade the display screen; taking folding products as an example, at present, the hinge mechanism of the folding module has a bending performance, and there is a gap between the bending area and the overlap part of the screen, which cannot be 100% waterproof and sweat-proof. In the folding module, a foldable polarizer is usually set on the flexible display panel. The polarizer needs to go through a two-cut (laser cutting) process during the assembly and bonding process of the screen factory. After the side cutting, the side of the polarizer glue layer is directly exposed to the air; when conducting artificial sweat tests, sweat will invade from the side of the polarizer, causing the edge of the polarizer to fade due to sweat erosion. Summary of the invention

[0003] The embodiments of the present application provide a foldable display module and a display device, which can prevent water vapor from invading from the peripheral side of the polarizer while improving the anti-extrusion capability of the foldable display module at its edge.

[0004] In order to achieve the above object, according to a first aspect of the present application, a foldable display module is provided, comprising:

[0005] display panel; and

[0006] A polarizer, wherein the polarizer is arranged on the light-emitting side of the display panel, the edge of the polarizer is set inward compared with the edge of the display panel, and in the direction away from the display panel, the polarizer at least includes a polarizing layer, a protective layer and a hardening layer which are stacked;

[0007] A hardening coating, wherein the hardening coating is disposed on the light-emitting side of the display panel, the hardening coating at least covers the peripheral side surface of the polarizer, and the edge of the hardening coating is flush with the edge of the display panel;

[0008] Wherein, the hardening coating layer and the hardening layer are arranged separately.

[0009] In one embodiment, the elastic modulus of the hardened coating layer is greater than the elastic modulus of the hardened layer.

[0010] In one embodiment, the polarizer has a first surface facing away from the display panel;

[0011] The hardening coating comprises a first protection segment and a second protection segment, the first protection segment is arranged around the circumference of the second protection segment, the second protection segment covers the first surface of the polarizer, and the first protection segment covers the circumferential side of the polarizer;

[0012] Wherein, the first surface includes a surface of the hardened layer facing away from the protective layer.

[0013] In one embodiment, the elastic modulus of the first protection segment is greater than the elastic modulus of the second protection segment.

[0014] In one embodiment, the foldable display module has two flat areas and a bending area connecting the two flat areas;

[0015] The elastic modulus of the second protection segment at the flat area is greater than the elastic modulus of the second protection segment at the bending area.

[0016] In one embodiment, the second protection segment is hollowed out at a position corresponding to the bending area to form a mesh structure.

[0017] In one embodiment, the foldable display module further includes a first adhesive layer, which is disposed on a side of the hardening coating layer facing the display panel, and the first adhesive layer connects the hardening coating layer and the display panel.

[0018] In one embodiment, the thermal shrinkage rate of the hardened coating is the same as the thermal shrinkage rate of the polarizer.

[0019] In one embodiment, the material of the hardened coating at least includes polyurethane or polyacrylate.

[0020] According to a second aspect of the present application, a display device is provided, comprising the above-mentioned folding display module.

[0021] In the folding display module of the embodiment of the present application, a polarizer is arranged on the light-emitting side of the display panel, and the polarizer includes a polarizing layer, a protective layer and a hardening layer which are stacked. The polarizing layer has polarization performance, the protective layer protects the polarizing layer from physical damage, moisture and chemical corrosion, and the hardening layer improves the surface hardness of the polarizer to prevent scratches and wear; the edge of the polarizer is set inward compared to the edge of the display panel, and a hardening coating is coated on at least the peripheral side of the polarizer. By setting the edge of the hardening coating flush with the edge of the display panel, the anti-extrusion ability of the edge of the folding display module is improved; at the same time, the peripheral side of the polarizer is coated with a hardening coating, which can prevent water vapor from invading from the peripheral side of the polarizer, thereby preventing sweat from corroding the polarizer, solving the problem of fading of the edge of the polarizer caused by sweat corrosion, and further improving the weather resistance of the folding display module.

[0022] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0024] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0025] Figure 1 It is a film layer diagram of a folding display module in the prior art;

[0026] Figure 2 A linear graph of dye loss at the side of a polarizer in the prior art;

[0027] Figure 3 A first film layer diagram of a foldable display module provided in an embodiment of the present application;

[0028] Figure 4 A film layer diagram of the first type of polarizer (incoming state) provided in an embodiment of the present application;

[0029] Figure 5 A first film layer diagram of the polarizer (laminated state) provided in an embodiment of the present application;

[0030] Figure 6 A first film layer diagram of a foldable display module provided in an embodiment of the present application;

[0031] Figure 7 A film layer diagram of the first type of polarizer (incoming state) provided in an embodiment of the present application;

[0032] Figure 8 A first film layer diagram of the polarizer (laminated state) provided in an embodiment of the present application;

[0033] Fig. 9 A plan view of a foldable display module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] The present application provides a foldable display module 100 and a display device. The following are detailed descriptions. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0036] In a first aspect, the present invention provides a foldable display module 100. Figure 3 The folding display module 100 includes a display panel 1, a polarizer 2 and a hardening coating 3. The polarizer 2 is arranged on the light-emitting side of the display panel 1. The edge of the polarizer 2 is retracted compared to the edge of the display panel 1. In the direction away from the display panel 1, the polarizer 2 at least includes a stacked polarizing layer 21, a protective layer 22 and a hardening layer 23. The hardening coating 3 is arranged on the light-emitting side of the display panel 1. The hardening coating 3 at least covers the peripheral side surface 2a of the polarizer 2. The edge of the hardening coating 3 is flush with the edge of the display panel 1; wherein the hardening coating 3 and the hardening layer 23 are separately arranged.

[0037] It is known that in the prior art, see Figure 1 and Figure 2 , because the foldable display module 100' has bending performance, there is a gap between the overlapped position of the cover plate 4' of the foldable display module 100' and the display panel 1' at the position corresponding to the bending area, and it is not possible to achieve 100% waterproof. At the same time, in order to ensure the neatness of the edge of the foldable display module 100', after the various film layers of the foldable display module 100' are bonded, the foldable display module 100' needs to be cut as a whole. However, after cutting, the side of the polarizer 2' is exposed, and sweat will invade from the side of the polarizer 2', destroying the boric acid bridge in the polarization layer of the polarizer 2', thereby causing the dye ([I3] - and [I5] - ) is lost and faded, and the acid-base environment will also accelerate the loss of the dye, and then corrosion and fading will occur at the edge of the polarizer 2', resulting in a white edge with a width of 1 to 3 mm.

[0038] In this application, please refer to Figures 3 to 5The polarizer 2 includes a polarizing layer 21, a protective layer 22 and a hardening layer 23 which are stacked. The polarizing layer 21 has polarization performance. The protective layer 22 protects the polarizing layer 21 from physical damage, moisture and chemical corrosion. The hardening layer 23 increases the surface hardness of the polarizer 2 to prevent scratches and wear. The edge of the polarizer 2 is set inward compared to the edge of the display panel 1. The hardening coating 3 at least covers the peripheral side surface 2a of the polarizer 2. The folding display module 100 also includes a cover plate 4, a first optical adhesive layer 5 and a back plate assembly 6. The cover plate 4 is arranged on the side of the polarizer 2 away from the display panel 1. The first optical adhesive layer 5 connects the cover plate 4 and the polarizer 2. The back plate assembly 6 is arranged on the back side of the display panel 1.

[0039] In order to improve the anti-extrusion ability of the folding display module 100 at its edge, it is necessary to cut the folding display module 100 after the lamination is completed to ensure that the edge of the folding display module 100 is neat. After the folding display module 100 is cut, the edge of the hardening coating 3 is flush with the edge of the display panel 1, so that the anti-extrusion ability of the folding display module 100 at its edge can be improved; at the same time, since after the folding display module 100 is cut, the edge of the hardening coating 3 is flush with the edge of the display panel 1, that is, the peripheral side surface 2a of the polarizer 2 is still covered with the hardening coating 3, it can prevent water vapor from invading from the peripheral side surface 2a of the polarizer 2, thereby preventing sweat from corroding the polarizer 2, solving the problem of fading of the edge of the polarizer 2 caused by sweat erosion, and thus improving the weather resistance of the folding display module 100.

[0040] See also Figure 4 and Figure 5 , and before the polarizer 2 is laminated to the display panel 1, the polarizer 2 further includes release films 25 located on both sides of the polarizer 2. When the polarizer 2 is laminated to the display panel 1, the release films 25 are torn off from the polarizer 2; at the same time, the hardening coating 3 has sufficient cutting space at the position corresponding to the edge of the folding display module 100; after the edge of the folding display module 100 is cut, the width W of the hardening coating 3 is set to 0.5 mm to 1 mm in the direction away from the side surface 2a of the polarizer 2; in this way, while ensuring that the edge of the folding display module 100 is neat, the effect of the hardening coating 3 in blocking sweat can be improved.

[0041] It should be noted that the present application does not impose any specific restrictions on the structure of the cover plate 4. The cover plate 4 includes two parts: a main body and a protective layer. The main body can be set to UTG (full name in English: Ultra-Thin Glass, Chinese abbreviation: ultra-thin glass), PET (full name in English: Polyethylene Terephthalate, Chinese abbreviation: polyethylene terephthalate); the protective layer can be set to PW (full name in English: protect window, Chinese abbreviation: cover material protective film), and CWO (full name in English: Chemically Weakened Oxide), and the material of the protective layer includes but is not limited to one of PET (full name in English: polyethylene glycol terephthalate, Chinese abbreviation: polyethylene terephthalate) and CPI (full name in English: Colorless Polyimide, Chinese abbreviation: transparent polyimide).

[0042] Similarly, the present application does not specifically limit the structure of the backplane assembly 6. The backplane assembly 6 includes a backplane 61 and a buffer support layer 62; the backplane 61 is disposed on the back side of the display panel 1; the buffer support layer 62 is disposed on the side of the backplane 61 away from the display panel 1; the buffer support layer 62 includes but is not limited to BFL / SUS, BFL / Ti alloy, or BFL / carbon fiber.

[0043] See also Figures 3 to 5 In the first embodiment of the present application, the polarizer 2 is arranged on the light-emitting side of the display panel 1, and the edge of the polarizer 2 is retracted compared to the edge of the display panel 1. In the direction away from the display panel 1, the polarizer 2 includes a stacked polarizing layer 21, a protective layer 22 and a hardening layer 23, and the hardening coating 3 includes a first protective segment 31, and the first protective segment 31 covers the peripheral side surface 2a of the polarizer 2; in this way, water vapor can be prevented from invading from the peripheral side surface 2a of the polarizer 2, thereby preventing sweat from corroding the polarizer 2, and further solving the problem of fading of the edge of the polarizer 2 caused by sweat erosion.

[0044] See also Figures 6 to 8In the second embodiment of the present application, the polarizer 2 is arranged on the light-emitting side of the display panel 1, and the edge of the polarizer 2 is retracted compared to the edge of the display panel 1. In the direction away from the display panel 1, the polarizer 2 includes a stacked polarizing layer 21, a protective layer 22 and a hardening layer 23, and the polarizer 2 has a first surface 2b away from the display panel 1; the hardening coating 3 includes a first protective segment 31 and a second protective segment 32, the first protective segment 31 is arranged around the circumference of the second protective segment 32, and the second protective segment 3 2 covers the first surface 2b of the polarizer 2, and the first protective segment 31 covers the peripheral side surface 2a of the polarizer 2; wherein the first surface 2b includes a side surface of the hardening layer 23 away from the protective layer 22; by providing the first protective segment 31 and the second protective segment 32, the wrapping ability of the hardening coating 3 on the polarizer 2 is improved, and the invasion of water vapor from the peripheral side surface 2a of the polarizer 2 can be further prevented, thereby further preventing the erosion of the polarizer 2 by sweat, thereby solving the problem of fading of the edge of the polarizer 2 caused by sweat erosion.

[0045] It can be seen from the first and second embodiments of the present application that the hardening coating 3 is disposed on the outer side of the polarizer 2. It can be seen that, since the hardening coating 3 at least covers the peripheral side surface 2a of the polarizer 2, the hardening coating 3 cannot be achieved by coating on a large roll of raw materials of the polarizer 2. The large roll of raw materials of the polarizer 2 can only be cut into small pieces of polarizer 2 according to the size of the display panel 1, and then the hardening coating 3 is disposed on the cut polarizer 2; and the hardening coating 3 is disposed on the outer side of the polarizer 2, which can simplify the coating process of the hardening coating 3.

[0046] The present application does not impose any specific restrictions on the formation method of the hardened coating 3. The hardened coating 3 can be set as an ultra-thin hardened coating; the hardened coating 3 can be made by a spraying process or a hanging coating process.

[0047] The present application does not impose any specific restrictions on the material of the hardened coating 3. The material of the hardened coating 3 includes, but is not limited to, polyurethane or polyacrylate. The hardened coating 3 is formed by polyurethane or polyacrylate. On the one hand, the hardened coating 3 has good water-blocking performance; on the other hand, the hardened coating 3 can have different elastic moduli by adjusting the curing process of the hardened coating 3, thereby meeting different product requirements.

[0048] Take “the hardening coating 3 includes a first protective segment 31 and a second protective segment 32 , the first protective segment 31 covers the peripheral side surface 2a of the polarizer 2 , and the second protective segment 32 covers the first surface 2b of the polarizer 2 ” as an example for explanation.

[0049] The coating material is made of polyurethane or polyacrylate as the main material; the coating material is applied to the first surface 2b and the peripheral side surface 2a of the polarizer 2 to form a hardened coating layer; the hardened coating layer is UV cured to form the hardened coating layer 3.

[0050] To ensure that the hardening coating 3 completely covers the first surface 2b and the peripheral side surface 2a of the polarizer 2, the thickness T of the hardening coating 3 is set to 3μm~5μm in the thickness direction of the folding display module 100; at the same time, the hardening coating 3 is formed by UV curing, and the thickness T of the hardening coating 3 is set to 3μm~5μm, which can ensure that the hardening coating 3 is fully cured.

[0051] In addition, the polarizer 2 further includes an adhesive layer 24; the adhesive layer 24 is not only used to adhere the film layers of the polarizer 2, but also to attach the polarizer 2 to the light-emitting side of the display panel 1. Based on the structure and manufacturing process of the polarizer 2, the polarizer 2 will shrink when heated. By setting the thermal shrinkage rate of the hardening coating 3 to be the same as the thermal shrinkage rate of the polarizer 2, when the polarizer 2 is heated, the hardening coating 3 can shrink synchronously, so that the hardening coating 3 can wrap the first surface 2b and the peripheral side surface 2a of the polarizer 2, thereby ensuring the strength of the hardening coating 3.

[0052] As mentioned above, the polarizer 2 also includes an adhesive layer 24; the adhesive layer 24 is not only used to adhere the film layers of the polarizer 2, but also to adhere the polarizer 2 to the light-emitting side of the display panel 1. In order to further prevent water vapor from invading from the peripheral side 2a of the polarizer 2, the folding display module 100 also includes a first adhesive layer 7, which is arranged on the side of the hardening coating 3 facing the display panel 1, and the first adhesive layer 7 connects the hardening coating 3 and the display panel 1. By providing the first adhesive layer 7, on the one hand, the hardening coating 3 and the display panel 1 are connected, thereby improving the bonding strength between the polarizer assembly 2 and the display panel 1; on the other hand, the first adhesive layer 7 seals the hardening coating 3 and the display panel 1, further preventing water vapor from invading from the peripheral side 2a of the polarizer 2.

[0053] In one embodiment of the present application, the elastic modulus of the hardened coating layer 3 is greater than the elastic modulus of the hardened layer 23 .

[0054] Taking "the hardening coating 3 includes a first protective segment 31, and the first protective segment 31 covers the peripheral side surface 2a of the polarizer 2" as an example, the elastic modulus of the hardening coating 3 is greater than the elastic modulus of the hardening layer 23. When impacted, the hardening coating 3 has a smaller elastic deformation, so that the hardening coating 3 has better support for the cover plate 4, thereby improving the anti-extrusion ability of the folding display module 100 at its edge.

[0055] Take “the hardening coating 3 includes a first protective segment 31 and a second protective segment 32 , the first protective segment 31 covers the peripheral side surface 2a of the polarizer 2 , and the second protective segment 32 covers the first surface 2b of the polarizer 2 ” as an example for explanation.

[0056] It can be known that, in the folding display module 100, since most of the film layer materials are polymer materials, the front impact resistance of the folding display module 100 is poor; when the front of the folding display module 100 is squeezed by foreign objects or impacted by external forces, the display panel 1 will easily produce bright spots or black spots due to local deformation.

[0057] The elastic modulus of the hardened coating 3 is set to be greater than the elastic modulus of the hardened layer 23, that is, the elastic moduli of the first protective segment 31 and the second protective segment 32 are both greater than the elastic modulus of the hardened layer 23; the first protective segment 31 has better support for the cover plate 4, thereby improving the anti-extrusion ability of the folding display module 100 at its edge; and the second protective segment 32 covers the first surface 2b of the polarizer 2, and the elastic modulus of the second protective segment 32 is greater than the elastic modulus of the hardened layer 23, so that the front impact resistance of the folding display module 100 can be significantly improved, and when the folding display module 100 is squeezed by foreign objects or impacted by external forces, it can prevent the display panel 1 from generating bright spots or black spots due to extrusion and impact.

[0058] At the same time, the elastic modulus of the first protective segment 31 is set to be greater than the elastic modulus of the second protective segment 32; that is, on the hardening coating 3, the first protective segment 31 has the largest elastic modulus, and when subjected to extrusion and impact, the first protective segment 31 can provide greater supporting force, which can not only improve the anti-extrusion ability of the folding display module 100 at its edge; but also improve the stability of the first protective segment 31 covering the peripheral side surface 2a of the polarizer 2, and further prevent water vapor from invading from the peripheral side surface 2a of the polarizer 2.

[0059] In one embodiment of the present application, the foldable display module 100 has two flat areas A and a bending area B connecting the two flat areas A; the elastic modulus of the second protective segment 32 at the flat area A is greater than the elastic modulus at the bending area B.

[0060] The elastic modulus at the position corresponding to the flat area A is greater than the elastic modulus at the position corresponding to the bending area B; when subjected to extrusion and impact, the elastic deformation of the second protective segment 32 at the position of the flat area A is smaller, which is beneficial to improving the mechanical properties and impact performance of the folding display module 100 on the front; the second protective segment 32 has a larger elastic deformation at the position of the bending area B, and the second protective segment 32 has better flexibility at the position of the bending area B, is easier to bend, and can ensure the folding performance of the folding display module 100.

[0061] The present application does not impose any specific restrictions on the formation method of the hardened coating 3 having different elastic moduli in parts. It can be by setting different thicknesses, using different processes, or setting special structures.

[0062] It is understandable that hardness and elastic modulus are two important mechanical performance indicators in material science, which respectively reflect the response characteristics of materials under different loading conditions. Hardness is the ability of a material to resist local plastic deformation; elastic modulus is the ability of a material to resist deformation within the elastic range; generally, materials with higher hardness also have higher elastic modulus, because both hardness and elastic modulus are related to the atomic bonding force of the material. The stronger the atomic bonding force, the stronger the material's ability to resist deformation, so the hardness and elastic modulus will be higher. In other words, the purpose of regionalizing the elastic modulus on the hardened coating 3 can be achieved by adjusting the hardness of the local position on the hardened coating 3.

[0063] Based on the above-mentioned embodiment of "using polyurethane or polyacrylate as the main material to make a coating material; applying the coating material to the first surface 2b and the peripheral side surface 2a of the polarizer 2 to form a coating layer; UV curing the coating to form the hardened coating 3"; after applying the coating to the first surface 2b and the peripheral side surface 2a of the polarizer 2, the first protection segment 31 and the second protection segment 32 are respectively cured in different areas using a mask. The first protection segment 31 has the highest degree of curing, and in the second protection segment 32, the degree of curing at the position corresponding to the flat area A is the second highest, and the degree of curing at the position corresponding to the bending area B is the lowest; thereby, the hardness of the first protection segment 31 is greater than that of the second protection segment 32; on the second protection segment 32, the hardness at the position corresponding to the flat area A is greater than the hardness at the position corresponding to the bending area B.

[0064] That is to say, by curing the local positions of the hardened coating 3 to different degrees, the local positions of the hardened coating 3 have different hardnesses, so that the hardened coating 3 has better water-blocking performance and better supporting performance, and has better flexibility at the position corresponding to the bending area B, which is easier to bend and can ensure the folding performance of the folding display module 100.

[0065] In addition, in order to further reduce the third elastic modulus of the second protection segment 32 at the bending zone B, please refer to Fig. 9 The second protective segment 32 is hollowed out at the position corresponding to the bending zone B; by hollowing out the second protective segment 32 at the position corresponding to the bending zone B, the second protective segment 32 is more likely to deform at the position of the bending zone B, which is more conducive to the release of the bending stress of the folding display module 100.

[0066] Furthermore, at the position corresponding to the bending zone B, the second protection segment 32 may be provided with a mesh structure 33 or a hollow structure of other shapes, as long as the third elastic modulus of the second protection segment 32 at the bending zone B can be reduced.

[0067] In a second aspect, an embodiment of the present application provides a display device, the display device comprising a foldable display module 100. It should be noted that the foldable display module 100 is configured as the above-mentioned foldable display module 100, that is, the foldable display module 100 includes all the technical features of the above-mentioned foldable display module 100, and the display device includes all the embodiments of the above-mentioned foldable display module 100, and also has all the technical effects of the above-mentioned embodiments, which will not be described one by one here.

[0068] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0071] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A foldable display module, characterized in that: include: Display panel; as well as, A polarizer, wherein the polarizer is arranged on the light-emitting side of the display panel, the edge of the polarizer is set inward compared with the edge of the display panel, and in the direction away from the display panel, the polarizer at least includes a polarizing layer, a protective layer and a hardening layer which are stacked; A hardening coating, wherein the hardening coating is disposed on the light-emitting side of the display panel, the hardening coating at least covers the peripheral side surface of the polarizer, and the edge of the hardening coating is flush with the edge of the display panel; Wherein, the hardening coating layer and the hardening layer are arranged separately.

2. The foldable display module according to claim 1, wherein: The elastic modulus of the hardened coating layer is greater than the elastic modulus of the hardened layer.

3. The foldable display module according to claim 1, wherein: The polarizer has a first surface facing away from the display panel; The hardening coating comprises a first protection segment and a second protection segment, the first protection segment is arranged around the circumference of the second protection segment, the second protection segment covers the first surface of the polarizer, and the first protection segment covers the circumferential side of the polarizer; Wherein, the first surface includes a surface of the hardened layer facing away from the protective layer.

4. The foldable display module according to claim 3, wherein: The elastic modulus of the first protection segment is greater than the elastic modulus of the second protection segment.

5. The foldable display module according to claim 3, wherein: The foldable display module has two flat areas and a bending area connecting the two flat areas; The elastic modulus of the second protection segment at the flat area is greater than the elastic modulus of the second protection segment at the bending area.

6. The foldable display module according to claim 5, characterized in that: The second protection segment is hollowed out at a position corresponding to the bending area to form a mesh structure.

7. The foldable display module according to claim 1, wherein: The foldable display module further includes a first adhesive layer, which is disposed on a side of the hardening coating layer facing the display panel, and the first adhesive layer connects the hardening coating layer and the display panel.

8. The foldable display module according to claim 1, wherein: The thermal shrinkage rate of the hardened coating is the same as the thermal shrinkage rate of the polarizer.

9. The foldable display module according to claim 1, wherein: The material of the hardened coating includes at least polyurethane or polyacrylate.

10. A display device, characterized in that: It comprises a folding display module as described in any one of claims 1 to 9.

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