Display module and display device

Abstract

The present application provides a display module and a display device, which relate to the field of display technology and are used to improve the problem of liquid crystal deflection and light leakage in the liquid crystal box caused by backplane warping. The display module includes: a liquid crystal box, a backlight module, a backplane, a fixed frame, and a middle frame. The backlight module and the liquid crystal box are stacked and both are located inside the backplane. The fixed frame is coated on the outer surface of the backplane and has an extrusion section. The middle frame is arranged inside the backplane and is arranged opposite to the extrusion section. The edge of the liquid crystal box is fixed by the extrusion section and the middle frame. The middle frame includes multiple frame edges, which are arranged on the backplane and include a plastic support layer and a flexible support layer. The plastic support layer is fixed to the backplane. The flexible support layer is arranged on the side of the plastic support layer facing the extrusion section. The flexible support layer and the extrusion section are arranged opposite to each other. The flexible support layer and the extrusion section have an extrusion tendency on both sides of the liquid crystal box in the thickness direction of the display module. The present application can improve the problem of light leakage in the liquid crystal box caused by backplane warping.

Description

Technical Field

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

[0002] At present, although the reliability requirements for LCDs are becoming increasingly higher and the quality of LCDs is also getting better and better, there are still some shortcomings. For example, the backlight source in the LCD will generate a certain amount of stress on the liquid crystal box installed on the backlight source, especially at the four corners of the backlight source. The back plate in the backlight source is prone to warping and is transmitted to the liquid crystal box through the middle frame, which then causes the liquid crystal in the liquid crystal box to deflect, resulting in light leakage in the liquid crystal box. Summary of the Invention

[0003] In view of this, the present application provides a display module and a display device to improve the problem of liquid crystal deflection and light leakage in the liquid crystal cell caused by backplane warping.

[0004] The technical solutions adopted by this application to solve the above technical problems are:

[0005] In a first aspect, an embodiment of the present application provides a display module, comprising:

[0006] Liquid crystal cell;

[0007] A backlight module is stacked with the liquid crystal cell;

[0008] a back plate having an opening and a receiving portion, wherein the liquid crystal box and the backlight module are located in the receiving portion, and the liquid crystal box is arranged close to the opening relative to the backlight module;

[0009] a fixing frame, the fixing frame being covered on the outer surface of the back plate, and the edge of the fixing frame extending and protruding toward the opening center of the accommodating portion to form an extrusion section;

[0010] a middle frame, disposed in the accommodating portion, the middle frame being arranged opposite to the extrusion section, and the edge portion of the liquid crystal cell being fixed by being clamped between the extrusion section and the middle frame;

[0011] In which, the middle frame includes multiple frame edges, and the multiple frame edges are connected end to end in sequence to make the middle frame a closed loop, or the multiple frame edges are connected in sequence to make the middle frame an open loop. The multiple frame edges are all arranged on the back panel, and the frame edges include a plastic support layer and a flexible support layer. The plastic support layer is fixed on the back panel, and the flexible support layer is arranged on the side of the plastic support layer facing the extrusion section. The flexible support layer and the extrusion section are arranged opposite to each other, and the elastic modulus of the plastic support layer is greater than the elastic modulus of the flexible support layer. The flexible support layer and the extrusion section have an extrusion tendency on both sides of the liquid crystal box in the thickness direction of the display module.

[0012] In some embodiments of the present application, the plastic support layer has a length direction, and at least two mounting grooves are formed on the side of the plastic support layer facing the liquid crystal box, and the two mounting grooves are arranged relatively spaced apart along the length direction. The flexible support layer is arranged in the mounting groove and connected to the plastic support layer. The plastic support layer is provided with a first surface on the side facing the liquid crystal box, and the first surface is located between the two mounting grooves arranged at intervals. The flexible support layer is provided with a second surface on the side facing the liquid crystal box, and the first surface is connected to and flush with the second surface.

[0013] In some embodiments of the present application, the groove wall of the mounting groove is a first curved surface and the first curved surface is smoothly connected to the first surface; a second curved surface is provided on the side of the flexible support layer facing the plastic support layer; the second curved surface is oriented and connected to the first curved surface and the shape is adapted.

[0014] In some embodiments of the present application, the first curved surface is convex toward the liquid crystal box, and the second curved surface is concave toward the liquid crystal box.

[0015] In some embodiments of the present application, the plastic support layer has a length direction, and along the length direction, the thickness of the plastic support layer in the thickness direction gradually increases from both sides of the plastic support layer toward the middle of the plastic support layer; in the length direction, along one side of the plastic support layer toward the middle, the thickness of the flexible support layer in the thickness direction gradually decreases.

[0016] In some embodiments of the present application, the length of the first surface is L, the length of the second surface is C, and C is ≤ 1 / 2L.

[0017] In some embodiments of the present application, the maximum thickness of the plastic supporting layer in the thickness direction is H, the maximum thickness of the flexible supporting layer in the thickness direction is h, and h<1 / 2H.

[0018] In some embodiments of the present application, the plastic support layer and the flexible support layer are an integrally formed structure.

[0019] In some embodiments of the present application, the display module also includes a reflective sheet, a light guide plate and an optical film layer. The reflective sheet is arranged on the back panel, the light guide plate is arranged on the side of the reflective sheet away from the back panel, and the optical film layer is arranged on the side of the light guide plate away from the back panel.

[0020] In a second aspect, an embodiment of the present application provides a display device comprising the display module as described in the first aspect.

[0021] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0022] Embodiments of the present application provide a display module and a display device, wherein the middle frame is composed of a plastic support layer and a flexible support layer. The flexible support layer has elastic properties and contacts the liquid crystal cell. The flexible support layer and the fixed frame together squeeze and fix the edge of the liquid crystal cell. When the back plate warps and is transmitted to the liquid crystal cell through the middle frame, the flexible support layer is deformed by the stress transmitted by the back plate, so that the flexible support layer remains flat, the edge of the liquid crystal cell does not tilt, and the liquid crystal inside the liquid crystal cell does not deflect, thereby improving the problem of light leakage in the liquid crystal cell caused by the warping of the back plate. Specifically, the flexible support layer and the squeezing section are arranged relative to each other to define a fixed space for fixing the liquid crystal cell, clamping the edge of the liquid crystal cell. The flexible support layer is made of an elastic material. When the back plate warps and transmits stress to the flexible support layer, the flexible support layer can deform under the stress of the warping back plate and the reaction force of the liquid crystal cell, thereby maintaining flatness, thereby preventing the liquid crystal inside the liquid crystal cell from deflecting and achieving the purpose of preventing light leakage of the liquid crystal cell. In addition, in addition to using a flexible support layer with elastic properties, a plastic support layer with plastic properties needs to be set under the flexible support layer to strengthen the strength of the middle frame, so that the middle frame has sufficient supporting strength, and the distance between the middle frame and the extrusion section can be more accurately controlled and set, which is convenient for fixing the liquid crystal box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings of the embodiments. Obviously, the drawings described below only relate to some embodiments of the present application and are not intended to limit the present application.

[0024] Figure 1 A schematic cross-sectional view of the display module provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the side structure of the frame and liquid crystal cell assembly provided in an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the side structure of the plastic support layer provided in an embodiment of the present application;

[0027] Figure 4 This is a schematic diagram of the side structure of the flexible support layer provided in an embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of the top structure of the middle frame provided in the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. Back panel; 2. Middle frame; 21. Frame edge; 211. Plastic support layer; 2111. Mounting groove; 21111. First curved surface; 2112. First surface; 212. Flexible support layer; 2121. Second surface; 2122. Second curved surface; 3. Liquid crystal box; 4. Fixed frame; 41. Extrusion section; 5. Backlight module; 51. Reflector; 52. Light guide plate; 53. Optical film layer; 54. Shading layer; 6. First polarizer; 7. Second polarizer. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0033] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, known structures and processes are not described in detail to avoid obscuring the description of the present application with unnecessary detail. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles disclosed herein.

[0034] See Figure 1 and Figure 5 , an embodiment of the present application provides a display module, comprising:

[0035] Liquid crystal cell 3;

[0036] A backlight module 5 is stacked with the liquid crystal cell 3;

[0037] The back panel 1 has an opening and a receiving portion. The liquid crystal box 3 and the backlight module 5 are located in the receiving portion. The liquid crystal box 3 is arranged close to the opening relative to the backlight module 5.

[0038] a fixing frame 4 , the fixing frame 4 covering the outer surface of the back plate 1 , and the edge of the fixing frame 4 extending toward the center of the opening of the accommodating portion to form an extrusion section 41 ;

[0039] The middle frame 2 is disposed in the accommodating portion. The middle frame 2 is disposed opposite to the extrusion section 41 . The edge of the liquid crystal cell 3 is fixed by being clamped between the extrusion section 41 and the middle frame 2 .

[0040] In which, the middle frame 2 includes multiple frame edges 21, and the multiple frame edges 21 are connected end to end in sequence to make the middle frame 2 a closed loop, or the multiple frame edges 21 are connected in sequence to make the middle frame 2 an open loop. The multiple frame edges 21 are all arranged on the back plate 1, and the frame edges 21 include a plastic support layer 211 and a flexible support layer 212. The plastic support layer 211 is fixed on the back plate 1, and the flexible support layer 212 is arranged on the side of the plastic support layer 211 facing the extrusion section 41. The flexible support layer 212 is arranged opposite to the extrusion section 41. The elastic modulus of the plastic support layer 211 is greater than the elastic modulus of the flexible support layer 212. The flexible support layer 212 and the extrusion section 41 have an extrusion tendency on both sides of the liquid crystal box 3 in the thickness direction of the display module.

[0041] It should be noted that the back plate 1 is shaped like a box with an unsealed top, while the fixed frame 4 surrounds the outer side of the back plate 1, also in the shape of an unsealed box. Furthermore, the fixed frame 4 has an extrusion section 41 extending from one unsealed side. The projection of this extrusion section 41 toward the liquid crystal cell 3 covers the edge of the liquid crystal cell 3, so that the extrusion section 41 and the middle frame 2, when positioned opposite each other, can clamp and secure the liquid crystal cell 3.

[0042] The liquid crystal cell provided in this application improves the material and structure of the middle frame 2, giving it a certain degree of deformation capability. When the back plate 1 warps, the characteristics of the middle frame 2 ensure that the corners of the liquid crystal cell 3 remain flat and prevent tilting, thereby effectively preventing the shifting of the liquid crystal within the liquid crystal cell 3. The structure of the middle frame 2 will be described in detail in subsequent embodiments.

[0043] Furthermore, the backlight module 5 includes a reflective sheet 51, a light guide plate 52, and an optical film layer 53. The reflective sheet 51 is disposed on the back panel 1, the light guide plate 52 is disposed on the side of the reflective sheet 51 facing away from the back panel 1, and the optical film layer 53 is disposed on the side of the light guide plate 52 facing away from the back panel 1. Furthermore, a light shielding layer 54 is disposed on the optical film layer 53. The light shielding layer 54 is located at the edge of the optical film layer 53 and extends to the side of the middle frame 2 facing the liquid crystal cell 3. A first polarizer 6 and a second polarizer 7 are also disposed on the upper and lower sides of the liquid crystal cell 3, respectively.

[0044] To better understand how the display module effectively prevents light leakage caused by the warping of the back panel 1, the following is a detailed introduction to the main structure of the middle frame 2 that achieves this effect:

[0045] The technical means provided in this application are mainly that the middle frame 2 is composed of a plastic support layer 211 and a flexible support layer 212, and the flexible support layer 212 has elastic properties and is in contact with the liquid crystal box 3, and the flexible support layer 212 and the fixed frame 4 jointly squeeze and fix the edge of the liquid crystal box 3. When the back plate 1 is warped and transmitted to the liquid crystal box 3 through the middle frame 2, the flexible support layer 212 is deformed by the stress transmitted by the back plate 1, so that the flexible support layer 212 remains flat, the edge of the liquid crystal box 3 will not be tilted, and the liquid crystal in the liquid crystal box 3 will not be deflected, thereby improving the problem of light leakage in the liquid crystal box 3 due to the warping of the back plate 1. Specifically, the flexible support layer 212 and the extrusion section 41 are positioned relative to each other to define a fixed space for securing the liquid crystal cell 3. The edges of the liquid crystal cell 3 are then clamped. The flexible support layer 212 is then made of an elastic material. When the back panel 1 warps and transfers stress to the flexible support layer 212, the flexible support layer 212 deforms under the stress of the warping of the back panel 1 and the reaction force of the liquid crystal cell 3, thereby maintaining its flatness. This prevents deflection of the liquid crystal within the liquid crystal cell 3 and achieves the purpose of preventing light leakage from the liquid crystal cell. Furthermore, in addition to the elastic flexible support layer 212, a plastic support layer 211 with plastic properties is also provided beneath the flexible support layer 212 to strengthen the middle frame 2, ensuring sufficient support strength. This also allows for more accurate control of the distance between the middle frame 2 and the extrusion section 41, facilitating securement of the liquid crystal cell 3.

[0046] See Figure 1 and Figure 5In some embodiments, the middle frame 2 includes three frame edges 21, which are connected in sequence along the circumference of the display module and form an open loop. Each frame edge 21 has a plastic support layer 211 and a flexible support layer 212. In another embodiment, the middle frame 2 may also include four frame edges 21, which are connected in sequence and form a closed loop. Similarly, each frame edge 21 has a plastic support layer 211 and a flexible support layer 212. Of course, in other embodiments, the middle frame 2 may also have five frame edges 21, six frame edges 21, etc. The specific number is not limited and can be selected according to the actual requirements of the display module. In addition, whether the middle frame 2 is a closed loop or an open loop can also be selected according to actual conditions and is not limited.

[0047] In some embodiments, see Figures 2 to 4 The plastic support layer 211 has at least two mounting grooves 2111 formed along its length and on its side facing the liquid crystal cell 3. In this embodiment, each plastic support layer 211 has two mounting grooves 2111 spaced apart from each other along its length. A flexible support layer 212 is disposed within the mounting grooves 2111 and connected to the plastic support layer 211. The side of the plastic support layer 211 facing the liquid crystal cell 3 has a first surface 2112 located between the two spaced-apart mounting grooves 2111. The side of the flexible support layer 212 facing the liquid crystal cell 3 has a second surface 2121 connected and flush with the first surface 2112. By forming the mounting grooves 2111 on the plastic support layer 211 and disposing the flexible support layer 212 within the mounting grooves 2111, and utilizing the elastic deformation properties of the flexible support layer 212, the deformation of the flexible support layer 212 can prevent the liquid crystal cell 3 from tilting. The first surface 2112 and the second surface 2121 are initially flush, further ensuring that the surface supporting the liquid crystal cell 3 is flat, thereby preventing the liquid crystal in the liquid crystal cell 3 from shifting. It should be noted that the plastic support layer 211 and the flexible support layer 212 are not merely in contact, but are fixedly connected. Preferably, in this embodiment, the plastic support layer 211 and the flexible support layer 212 are integrally formed, which allows for better precision control compared to attaching the flexible support layer 212 to the plastic support layer 211.

[0048] It should be noted that the number and location of the mounting grooves 2111 are not limited in this embodiment. As long as the mounting grooves 2111 are arranged along the circumference of the middle frame 2, especially at the corners of the middle frame 2, that is, at both ends of each frame edge 21 of the middle frame 2, the requirements are met. Because the warping of the back panel 1 is mainly at the corners, the mounting grooves 2111 are only required to be arranged at the corners of the middle frame 2. As for the other mounting grooves 2111 arranged along the circumference of the middle frame 2, they are further preferably used to prevent warping of other parts of the back panel 1 and cause deflection of the liquid crystal in the liquid crystal cell 3. The shape of the mounting grooves 2111 can be rectangular, trapezoidal, fan-shaped, or other irregular shapes, as long as the mounting grooves 2111 can be used to install the flexible supporting layer 212 and ensure that the second surface 2121 of the flexible supporting layer 212 is flush with the first surface 2112. Furthermore, more preferably, the flexible support layer 212 is disposed on both sides of the plastic support layer 211 in the longitudinal direction. When the back panel 1 warps, it generally warps from the sides toward the center, with the edges being the most severely warped. Therefore, the flexible support layer 212 is disposed on both sides of the plastic support layer 211 to effectively prevent the deflection caused by the warping of the back panel 1. Furthermore, the plastic support layer 211 in the middle portion provides support, preventing the middle frame 2 from warping along with the back panel 1.

[0049] In some embodiments, see Figure 3 and Figure 4 The groove wall of the mounting groove 2111 is a first curved surface 21111 and the first curved surface 21111 is smoothly connected to the first surface 2112, so that there is no angle at the connection between the first curved surface 21111 and the first surface 2112, which is conducive to the connection between the flexible support layer 212 and the first surface 2112 after being placed in the mounting groove 2111; the flexible support layer 212 is provided with a second curved surface 2122 on the side facing the plastic support layer 211; the second curved surface 2122 is in shape contact and connection with the first curved surface 21111 and is adapted in shape, so that the flexible support layer 212 can be completely matched in the mounting groove 2111.

[0050] Furthermore, the first curved surface 21111 is convex toward the liquid crystal cell 3, while the second curved surface 2122 is concave toward the liquid crystal cell 3. Compared to a configuration in which the first curved surface 21111 is concave and the second curved surface 2122 is convex, the flexible supporting layer 212 is better able to withstand stress when the middle frame 2 warps due to warping of the back plate 1, effectively reducing the effect of stress on the liquid crystal cell 3. It should also be noted that in this embodiment, the installation groove 2111 is an arc-shaped groove, i.e., the groove wall is the first curved surface 21111, and the flexible supporting layer 212 has the second curved surface 2122. This also helps reduce stress on the liquid crystal cell 3 compared to a rectangular or other angled structure.

[0051] In some embodiments, the plastic support layer 211 has a lengthwise direction, and along the lengthwise direction, the thickness of the plastic support layer 211 in the thickness direction of the display module gradually increases from both sides of the plastic support layer 211 toward the middle of the plastic support layer 211; and along the lengthwise direction, the thickness of the flexible support layer 212 gradually decreases from one side toward the middle of the plastic support layer 211. By limiting the thickness variation of the plastic support layer 211 in the lengthwise direction, a mounting groove 2111 for mounting the flexible support layer 212 is defined. The thickness of the plastic support layer 211 gradually varies along the length, with a gradual change. Compared to a direct step-type thickness variation, the thickness variation is smoother. When the flexible support layer 212 located in the mounting groove 2111 is subjected to a force caused by the warping of the back panel 1, the stress generated at the connection between the plastic support layer 211 and the flexible support layer 212 is reduced, which helps the flexible support layer 212 and the plastic support layer 211 remain flat under the force.

[0052] In some embodiments, see Figures 2 to 4 , the length of the first surface 2112 is L, and the length of the second surface 2121 is C, where C ≤ 1 / 2L. The length of the side of the middle frame 2 is the length of the two second surfaces 2121 plus the length of one first surface 2112. The two second surfaces 2121 are located on both sides of the first surface 2112, that is, the length of the side of the middle frame 2 is 2C + L. By limiting C ≤ 1 / 2L, which is equivalent to limiting the length of the second surface 2121 to be less than or equal to one-quarter of the length of the side of the middle frame 2, it is avoided that the length of the second surface 2121 is too long, far exceeding the range where the back panel 1 may warp, resulting in material waste and reduced strength. Because the length of the second surface 2121 is too long, the length of the first surface 2112 used for support will be too short, thus affecting the strength of the middle frame 2. Limiting the length of the second surface 2121 to within one-fourth of the total length of the frame edge is also beneficial in ensuring the flatness of the first surface 2112 and the second surface 2121 during the manufacturing process. This is because the longer the second surface 2121, the more difficult it is to control the flatness of the junction between the second surface 2121 and the first surface 2112. Furthermore, if the second surface 2121 is too long, when the backplane 1 warps, not only will part of the second surface 2121 be wasted in material and fail to buffer the stress of warping, but only a small portion of the second surface 2121 will deform to buffer the stress, while other parts of the second surface 2121 will experience deformation opposite to the warping, resulting in unevenness between the first surface 2112 and the second surface 2121.

[0053] In some embodiments, see Figure 2The maximum thickness of the plastic support layer 211 is H, and the maximum thickness of the flexible support layer 212 is h, where h<1 / 2H. That is, in this embodiment, the maximum thickness of the flexible support layer 212 is limited to less than half the maximum thickness of the plastic support layer 211. This prevents the maximum thickness of the flexible support layer 212 from being too thick, which would cause the portion of the liquid crystal cell 3 placed on the flexible support layer 212 and the portion placed on the plastic support layer 211 to be non-planar, resulting in the liquid crystal cell 3 being tilted.

[0054] In some embodiments, the material of the flexible support layer 212 can be silicone or other soft elastic materials, without specific limitation; the material of the plastic support layer 211 is generally PC plastic to enhance the strength of the middle frame 2, especially the strength of the first surface 2112, so that the first surface 2112 and the second surface 2121 form a more obvious contrast in strength, which facilitates the deformation of the second surface 2121 to buffer the warping of the back panel 1.

[0055] The present application also provides a display device comprising a display module as described in any of the above embodiments. Because the display device comprises the display module described in the above embodiments, it also has the structure and beneficial effects of the display module. The derivation process of the specific structure and beneficial effects can be found in the above embodiments and will not be repeated here.

[0056] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0057] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0058] Similarly, it should be noted that, in order to simplify the description of this application and thus facilitate understanding of one or more embodiments of the application, the foregoing description of the embodiments of this application sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, the features of an embodiment may be fewer than all the features of the individual embodiments disclosed above.

[0059] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, and documents, cited in this application is hereby incorporated by reference in its entirety, except for any application history that is inconsistent with or conflicts with this application, and any document (currently or subsequently appended to this application) that limits the broadest scope of the claims of this application. It should be noted that if the descriptions, definitions, and / or terminology used in the accompanying materials are inconsistent with or conflict with the content of this application, the descriptions, definitions, and / or terminology used in this application will control.

Claims

1. A display module, characterized in that: include: Liquid crystal cell; A backlight module is stacked with the liquid crystal cell; a back plate having an opening and a receiving portion, wherein the liquid crystal box and the backlight module are located in the receiving portion, and the liquid crystal box is arranged close to the opening relative to the backlight module; a fixing frame, the fixing frame being covered on the outer surface of the back plate, and the edge of the fixing frame extending and protruding toward the opening center of the accommodating portion to form an extrusion section; a middle frame, disposed in the accommodating portion, the middle frame being arranged opposite to the extrusion section, and the edge portion of the liquid crystal cell being fixed by being clamped between the extrusion section and the middle frame; The middle frame includes a plurality of frame edges, which are sequentially connected end to end to form a closed loop or sequentially connected to form an open loop. The plurality of frame edges are all provided on the back panel, and the frame edges include a plastic support layer and a flexible support layer. The plastic support layer is fixedly provided on the back panel, and the flexible support layer is provided on a side of the plastic support layer facing the extrusion segment. The flexible support layer and the extrusion segment are arranged opposite to each other, and the elastic modulus of the plastic support layer is greater than the elastic modulus of the flexible support layer. The flexible support layer and the extrusion segment have an extrusion tendency on both sides of the liquid crystal box in the thickness direction of the display module. The plastic support layer has a length direction, and at least two mounting grooves are formed on a side of the plastic support layer facing the liquid crystal box, and the two mounting grooves are spaced apart from each other along the length direction. The flexible support layer is arranged in the mounting grooves and connected to the plastic support layer. The plastic support layer has a first surface on a side facing the liquid crystal box, and the first surface is located between the two spaced-apart mounting grooves. The flexible support layer has a second surface on a side facing the liquid crystal box, and the first surface is connected to and flush with the second surface. The plastic support layer has a length direction, and along the length direction, the thickness of the plastic support layer in the thickness direction gradually increases from both sides of the plastic support layer toward the middle of the plastic support layer; in the length direction, along one side of the plastic support layer toward the middle, the thickness of the flexible support layer in the thickness direction gradually decreases.

2. The display module according to claim 1, wherein: The groove wall of the mounting groove is a first arcuate surface and the first arcuate surface is smoothly connected to the first surface; the flexible support layer is provided with a second arcuate surface on the side facing the plastic support layer; the second arcuate surface is alignably connected to the first arcuate surface and has a matching shape.

3. The display module according to claim 2, wherein: The first curved surface is convex toward the liquid crystal box, and the second curved surface is concave toward the liquid crystal box.

4. The display module according to claim 1, wherein: The length of the first surface is L, the length of the second surface is C, and C is ≤ 1 / 2L.

5. The display module according to claim 1, wherein: The maximum thickness of the plastic supporting layer in the thickness direction is H, the maximum thickness of the flexible supporting layer in the thickness direction is h, and h is less than 1 / 2H.

6. The display module according to claim 1, wherein: The plastic supporting layer and the flexible supporting layer are an integrally formed structure.

7. The display module according to claim 1, wherein: The display module further includes a reflective sheet, a light guide plate and an optical film layer. The reflective sheet is arranged on the back plate, the light guide plate is arranged on the side of the reflective sheet away from the back plate, and the optical film layer is arranged on the side of the light guide plate away from the back plate.

8. A display device, characterized in that: The display module comprises the display module as claimed in any one of claims 1 to 7.

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