Backlight module and display device

Abstract

The utility model provides a backlight module and a display device. The backlight module comprises a back plate, and a first through hole is formed in the back plate; the reflecting part and the back plate are arranged in a stacked mode, a second through hole is formed in the reflecting part, and the first through hole corresponds to the second through hole; the limiting piece comprises a first limiting part, a penetrating part and a second limiting part, the penetrating part is connected with the first limiting part and the second limiting part, the penetrating part penetrates through the first through hole and the second through hole, the first limiting part abuts against the side, away from the back plate, of the reflecting piece, and the second limiting part abuts against the side, away from the reflecting piece, of the back plate. According to the backlight module, the problem of a conventional fixing scheme at present can be solved, the assembly process is improved, the reliability and the maintainability are improved, the production process is simplified, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field especially relates to a backlight module and display device. BACKGROUND

[0002] Display device usually includes liquid crystal module and backlight module, and the backlight module provides stable and uniform backlight source for the liquid crystal module. The backlight module includes backboard, reflecting member, diffusion plate and optical film piece and other components, wherein the reflecting member is fixed with the backboard through double-sided adhesive tape, especially in the arc region of the backboard. However, this fixing mode faces the following technical challenges: the reinforcing rib of the backboard intersects with the double-sided adhesive tape, resulting in lack of support for the adhesive tape in these areas, causing the reflecting member to collapse or deform, affecting the display effect and structural stability; in order to ensure the stability of the reflecting member, high-adhesion adhesive tape needs to be used, but this selection increases the difficulty of rework, because high adhesion makes the separation process complex and time-consuming, which increases the production cost; the above-mentioned structural design and material selection problems lead to the decline of production efficiency, and the installation and fixation of the reflecting member become obstacles in the production process, which prolongs the manufacturing cycle and may further compress the production capacity due to the rework requirement.

[0003] In summary, the existing display device has significant technical defects in the fixation of the reflecting member, and a new type of backlight module is needed to enhance the structural stability, simplify the rework process and improve the overall production efficiency. SUMMARY

[0004] The backlight module and display device provided by the embodiments of the present application can solve the problems of the conventional fixation scheme, improve the assembly process, improve the reliability and maintainability, simplify the production process and improve the production efficiency.

[0005] The backlight module provided by the embodiments of the present application comprises:

[0006] A backboard, wherein a first through hole is arranged on the backboard;

[0007] A reflecting member, wherein the reflecting member is arranged in a stack with the backboard, a second through hole is arranged on the reflecting member, and the first through hole and the second through hole are arranged correspondingly;

[0008] A limiting piece, wherein the limiting piece comprises a first limiting part, a penetrating part and a second limiting part, the penetrating part is connected with the first limiting part and the second limiting part respectively, the penetrating part is arranged in the first through hole and the second through hole, the first limiting part is located on the side of the reflecting member away from the backboard, and the second limiting part abuts against the side of the backboard away from the reflecting member.

[0009] In some embodiments, the second limiting part is bent from one end of the penetrating part, the second limiting part has a free end away from the one end of the penetrating part, and the free end abuts against the back plate.

[0010] In some embodiments, the number of the second limiting parts is multiple, and each of the multiple second limiting parts is connected with the penetrating part and abuts against the back plate away from the side of the reflecting member.

[0011] In some embodiments, the number of the penetrating parts is the same as the number of the second limiting parts, the multiple penetrating parts are connected with the first limiting part, and the multiple penetrating parts are connected with the multiple second limiting parts one by one.

[0012] In some embodiments, the first limiting part is rod-shaped.

[0013] In some embodiments, the first limiting part is arranged in parallel with the plane in which the reflecting member is located.

[0014] In some embodiments, the projection of the first limiting part on the plane in which the reflecting member is located covers the first through hole.

[0015] In some embodiments, the backlight module further comprises a scattering layer arranged on the surface of the first limiting part.

[0016] In some embodiments, the back plate has a reinforcing rib.

[0017] Embodiments of the present application also provide a display device comprising the above backlight module.

[0018] The backlight module and the display device provided by the embodiments of the present application, the backlight module comprises a back plate, a reflecting member, and a limiting member, the reflecting member is arranged in layers with the back plate, the back plate is provided with a first through hole, the reflecting member is provided with a second through hole, the limiting member comprises a first limiting part, a penetrating part, and a second limiting part, the penetrating part of the limiting member is located in the first through hole of the back plate and the second through hole of the reflecting member, the first limiting part is arranged on the side of the reflecting member away from the back plate, and the second limiting part abuts against the side of the back plate away from the reflecting member, thereby effectively fixing the relative position of the back plate and the reflecting member. Above, the limiting member can replace the adhesive tape in the prior art, so that the installation, maintenance, or replacement of the back plate and the reflecting member is more reliable and convenient, and the overall production efficiency is greatly improved by simplifying the production process. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0020] Figure 1 A structure schematic diagram of a backlight module in the prior art.

[0021] Figure 2 A structure schematic diagram of a backboard in the prior art.

[0022] Figure 3 A structure schematic diagram of a backlight module provided by the embodiments of the present application.

[0023] Figure 4 A structure schematic diagram of a backboard provided by the embodiments of the present application.

[0024] Figure 5 A first structure schematic diagram of a limiting piece provided by the embodiments of the present application: Figure 5 (1) A state before the limiting piece fixes the backboard and the reflecting piece; Figure 5 (2) A first state of the limiting piece fixed on the backboard and the reflecting piece; Figure 5 (3) A second state of the limiting piece fixed on the backboard and the reflecting piece.

[0025] Figure 6 A second structure schematic diagram of a limiting piece provided by the embodiments of the present application: Figure 6 (1) A state before the limiting piece fixes the backboard and the reflecting piece; Figure 6 (2) A state of the limiting piece fixed on the backboard and the reflecting piece.

[0026] Figure 7 A third structure schematic diagram of a limiting piece provided by the embodiments of the present application: Figure 7 (1) A state before the limiting piece fixes the backboard and the reflecting piece; Figure 7 (2) A state of the limiting piece fixed on the backboard and the reflecting piece. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort also belong to the protection scope of the present application.

[0028] Please refer to Figure 1 and Figure 2, Figure 1 A structural schematic diagram of a backlight module in the prior art, Figure 2 A structural schematic diagram of a backboard in the prior art.

[0029] A display device usually comprises a liquid crystal module and a backlight module 2, which provides a stable and uniform backlight source for the liquid crystal module. The backlight module 2 comprises a backboard 21, a reflector, a diffusion plate, and an optical film, etc. The reflector is fixed with the backboard 21 by double-sided tape 22, especially in the arc-shaped area of the backboard 21. However, this fixing method faces the following technical challenges: the reinforcing ribs 211 of the backboard 21 intersect with the double-sided tape 22, resulting in a lack of support for the tape in these areas, causing the reflector to collapse or deform, affecting the display effect and structural stability; in order to ensure the stability of the reflector, high-adhesion tape needs to be used, but this choice increases the difficulty of rework, because high adhesion makes the separation process complex and time-consuming, increasing production costs; the above structural design and material selection problems lead to a decline in production efficiency, and the installation and fixation of the reflector become obstacles in the production process, prolonging the manufacturing cycle and possibly further compressing production capacity due to rework requirements.

[0030] In summary, the existing display device has significant technical defects in the fixation of the reflector, and there is an urgent need for a new backlight module to enhance structural stability, simplify the rework process, and improve overall production efficiency.

[0031] The backlight module and display device provided by the embodiments of the present application can solve the problems of the conventional fixation scheme, improve the assembly process, improve reliability and maintainability, simplify the production process, and improve production efficiency. The following will be described with reference to the accompanying drawings.

[0032] Please refer to Figure 3 , Figure 3 A structural schematic diagram of the backlight module provided by the embodiments of the present application. The backlight module 100 is a key component in a display device, mainly responsible for providing a uniform and high-brightness backlight source for the liquid crystal module of the display device, so that the display device can normally display images.

[0033] The backlight module 100 comprises a backboard 10, a reflector 20, and a limiting piece 30. The backboard 10 is a basic support structure in the backlight module 100, and is usually used to mount and fix other components such as the reflector 20, a light source, etc.; the reflector 20 is located in the backlight module 100, and the reflector 20 is stacked with the backboard 10.

[0034] Please refer to Figure 4 , Figure 4The structure diagram of the backboard provided by the embodiment of the present application is shown in the figure. The backboard 10 comprises a plane part 11, a first wing part 12 and a second wing part 13, the first wing part 12 and the second wing part 13 extend out at an angle on both sides of the plane part 11. The light source of the backlight module 100 is arranged on the plane part 11; the reflecting member 20 is respectively arranged on the first wing part 12 and the second wing part 13, and the main function thereof is to reflect the light emitted by the light source outwards, thereby enhancing the brightness and uniformity of the backlight.

[0035] Please continue to refer to Figure 3 The limiting member 30 is used to fix the relative position of the backboard 10 and the reflecting member 20 in the backlight module 100, thereby preventing the two from loosening or mispositioning.

[0036] The first through hole 101 is arranged on the backboard 10, and the second through hole 201 is arranged on the reflecting member 20, and the first through hole 101 and the second through hole 201 are arranged correspondingly.

[0037] It can be understood that, in one case, the first through hole 101 and the second through hole 201 can be preset, that is, before the limiting member 30 fixes the reflecting member 20 to be assembled on the backboard 10, the first through hole 101 on the backboard 10 and the second through hole 201 on the reflecting member 20 can be aligned when the backboard 10 and the reflecting member 20 are arranged in a stack. In another case, the first through hole 101 is preset on the backboard 10, and when the limiting member 30 fixes the backboard 10 and the reflecting member 20, the reflecting member 20 can be punctured to form the second through hole 201, and then the backboard 10 and the reflecting member 20 are fixed relative to each other.

[0038] Please refer to Figure 5 , Figure 5 The first structure diagram of the limiting member provided by the embodiment of the present application is shown in the figure. Fig. (1) shows the state before the limiting member fixes the backboard and the reflecting member; Fig. (2) shows the first state of the limiting member fixed on the backboard and the reflecting member; and Fig. (3) shows the second state of the limiting member fixed on the backboard and the reflecting member.

[0039] The limiting member 30 comprises a first limiting part 301, a through part 302 and a second limiting part 303, the through part 302 is connected with the first limiting part 301 and the second limiting part 303 respectively, the through part 302 is arranged in the first through hole 101 and the second through hole 201, the first limiting part 301 is arranged on the side of the reflecting member 20 away from the backboard 10, and the second limiting part 303 abuts against the side of the backboard 10 away from the reflecting member 20, thereby ensuring that the reflecting member 20 will not displace or deform when subjected to external force.

[0040] Therefore, fixing the relative position of the back plate 10 and the reflecting member 20 by the limiting member 30 not only optimizes the assembly process, but also makes the assembly of the backlight module 100 more simple and fast, and significantly improves the reliability of the assembly and the convenience of the subsequent maintenance. Due to the reasonable structure design of the limiting member 30, the connection between each component is more firm, thereby reducing the failure rate caused by loosening or mispositioning. In addition, by simplifying the production process, the overall production efficiency is greatly improved, the production cost is reduced, and strong support is provided for the production and application of the backlight module 100.

[0041] In some embodiments, please refer to Figure 6 , Figure 6 The second structure diagram of the limiting member provided by the embodiment of the present application is shown in FIG. 1, which is the state before the limiting member fixes the back plate and the reflecting member. FIG. 2 is the state of the limiting member fixed on the back plate and the reflecting member. The first limiting part 301, the penetrating part 302 and the second limiting part 303 can form a " " shape. That is, the included angle between the first limiting part 301 and the penetrating part 302 is about 90°, and the included angle between the second limiting part 303 and the penetrating part 302 is about 90°, so that the penetrating part 302 can limit the translation mispositioning between the back plate 10 and the reflecting member 20, and the first limiting part 301 and the second limiting part 303 can limit the mispositioning between the back plate 10 and the reflecting member 20 in the thickness direction.

[0042] The cross-sectional area of the penetrating part 302 and the second limiting part 303 can be the same, so as to be penetrated in the first through hole 101 and the second through hole 201. That is, the limiting member 30 can be rod-shaped, for example, at least the penetrating part 302 and the first limiting part 301 are rod parts. The rod-shaped limiting member 30 directly penetrates the reflecting sheet (penetrates the reflecting sheet to form the second through hole 201 or penetrates the second through hole 201 pre-set on the reflecting sheet), and the first through hole 101 of the back plate 10, and the second limiting part 303 and / or the first limiting part 301 are bent towards the reflecting sheet and the back plate 10 to fix the relative position of the reflecting sheet and the back plate 10.

[0043] In some cases, please continue to refer to Figure 3, the diameter of the first through hole 101 is larger than the diameter of the penetrating portion 302, so that the penetrating portion 302 can drive the reflecting member 20 to move slightly within the first through hole 101 to adapt to the deformation of the elongation or shortening of the reflecting member 20 at different temperatures. For example, the slight gap between the first through hole 101 and the penetrating portion 302 provides the reflecting member 20 with the necessary space for movement. When the temperature rises, the reflecting member 20 may slightly elongate due to thermal expansion; on the contrary, when the temperature decreases, the reflecting member 20 may shorten. Because the diameter of the first through hole 101 is designed to be larger, the penetrating portion 302 can smoothly translate within the first through hole 101, thereby driving the reflecting member 20 to make corresponding slight adjustments. This design ensures that the reflecting member 20 can maintain accurate positions at different temperatures, thereby maintaining the overall performance of the display device. By introducing the design of the first through hole 101 and the penetrating portion 302, even if the reflecting member 20 material with a relatively high thermal expansion coefficient is used, similar performance can be achieved to some extent. This not only reduces the cost, but also increases the flexibility of material selection.

[0044] Please continue to refer to Figure 5 and Figure 6 , the second limiting portion 303 is bent from one end of the penetrating portion 302, and the bending design of the second limiting portion 303 enhances the stability of the structure, prevents it from shaking or deviating during operation, and also makes the entire structure more compact and robust. The free end 3031 of the second limiting portion 303 away from the penetrating portion 302 abuts against the back plate 10 to fix the relative position of the back plate 10 and the reflecting member 20 in the thickness direction. The abutment of the free end 3031 and the back plate 10 also plays a role in buffering and shock absorption. During the operation of the backlight module 100, it may encounter adverse factors such as vibration and impact. By abutting the free end 3031 with the back plate 10, the relative shaking of the back plate 10 and the reflecting member 20 can be avoided, improving the durability of the device.

[0045] The number of second limiting portions 303 is multiple, and the multiple second limiting portions 303 are respectively connected with the penetrating portion 302 and abut against the side of the back plate 10 away from the reflecting member 20.

[0046] In some cases, the number of the penetrating portion 302 is one. The second limiting portion 303 can increase the action point with the back plate 10 and improve the balance of the force. The design of the second limiting portion 303 can stably support the reflecting member 20 and resist external interference.

[0047] In other cases, the number of the penetrating portion 302 and the second limiting portion 303 is the same, multiple penetrating portions 302 are connected with the first limiting portion 301, and multiple penetrating portions 302 are connected with multiple second limiting portions 303 one by one. Not only does this design disperse the force and torque, reducing the load pressure of individual components, but it also provides higher structural redundancy.

[0048] For example, the number of the through portions 302 and the second limiting portions 303 is two, and the number of the first through holes 101 and the second through holes 201 is also two. The rotation tendency of the back plate 10 and the reflecting member 20 can be inhibited by the two through portions 302.

[0049] In some cases, please continue to refer to Figure 3 , Figure 5 and Figure 6 , the first limiting portion 301 is arranged in parallel with the plane where the reflecting member 20 is located. It can be understood that when the first limiting portion 301 abuts against the plane where the reflecting member 20 is located, the contact area is larger, the pressure exerted by the first limiting portion 301 on the reflecting member 20 is reduced, and the situation that scratches or damage occurs on the surface of the reflecting member 20 is reduced. Therefore, by arranging the first limiting portion 301 in parallel with the plane where the reflecting member 20 is located, potential physical damage can be effectively isolated, and the high-precision optical properties of the reflecting member 20 can be maintained. In this case, the limiting member 30 can be in the form of a rod, and the number of the through portions 302 and the second limiting portions 303 can be one or more.

[0050] In other cases, please refer to Figure 7 , Figure 7 , the third structure of the limiting member provided in the embodiments of the present application is shown in FIGS. (1) and (2). The projection of the first limiting portion 301 on the plane where the reflecting member 20 is located covers the first through hole 101, and the first limiting portion 301 abuts against the side of the reflecting member 20 away from the back plate 10, so as to increase the acting area of the first limiting portion 301 on the reflecting member 20. Without increasing additional materials or weight, the overall rigidity and durability of the structure can be effectively improved, and in particular, when facing environmental factors such as temperature changes, vibrations or external impacts, the risk of displacement or deformation of the reflecting member 20 can be significantly reduced. For example, as shown in Figure 7 , the projection of the first limiting portion 301 on the plane where the reflecting member 20 is located is in the form of a circle. The circular projection not only facilitates accurate manufacturing and positioning, but also can provide a uniform and extensive contact interface, reduce the pressure exerted by the first limiting portion 301 on the reflecting member 20, and reduce the situation that scratches or damage occurs on the surface of the reflecting member 20. In this case, the limiting member 30 can be in the form of a nail, for example, the first limiting portion 301 is in the form of a circle, and the through portions 302 and the second limiting portions 303 are in the form of rods.

[0051] The backlight module 100 also includes a scattering layer disposed on the surface of the first limiting portion 301. The scattering layer forms a diffuse reflection, reducing the impact on visual effects. In the backlight module 100, although the first limiting portion 301 mainly plays a role in limiting and fixing, if its surface is not treated, it may become a source of light reflection, especially in the case of strong light or sensitive viewing angle. These reflected lights may form glare or bright spots, interfere with the visual perception of the viewer, and reduce the overall texture and clarity of the picture.

[0052] The scattering layer can be a matte coating. Through the special design of its microstructure, the incident light is scattered multiple times on the surface of the coating instead of being specularly reflected. This diffuse reflection effect effectively reduces the intensity of direct reflected light, making the light more uniformly distributed throughout the field of view. In this way, not only is the local brightness caused by the reflection of the limiting portion avoided, but the overall uniformity of the picture and the viewing comfort are also improved.

[0053] The back plate 10 has reinforcing ribs. As a protruding structure inside or on the surface of the back plate 10, the main function of the reinforcing rib is to increase the rigidity and strength of the back plate 10, preventing it from deforming under long-term use or external force. Through reasonable layout and size design, the reinforcing rib can effectively disperse and resist stress from all directions, ensuring that the backlight module 100 maintains its designed shape and size accuracy, which is crucial for maintaining the correct alignment of optical components and ensuring image quality.

[0054] In addition, the reinforcing rib also helps to improve the heat dissipation efficiency of the back plate 10. When the backlight module 100 is working, the light source or other electronic components will generate heat, which will affect the performance and lifespan of the backlight module 100 if the heat cannot be dissipated in time. The design of the reinforcing rib can optimize the heat conduction path on the surface of the back plate 10, increase the contact area with the heat sink or external heat dissipation structure, and thus accelerate the transfer and dissipation of heat, keeping the backlight module 100 within a suitable working temperature range.

[0055] The embodiments of the present application also provide a display device, which can be any display device displaying either motion (e.g., video) or still (e.g., still images), and either text or graphics. More specifically, the embodiments are contemplated to be implemented in or associated with a variety of electronic devices such as, but not limited to, mobile telephones, wireless display devices, personal data assistants, handheld or portable computers, global positioning system receivers / navigators, cameras, video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automobile displays (e.g., odometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rear view cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images for a piece of jewelry), and the like. By way of example, the aforementioned display device can be a television (e.g., a liquid crystal television, etc.) or the like.

[0056] The display device includes the backlight module 100 described above, which provides a uniform and efficient backlight.

[0057] The display device also includes a liquid crystal module, which is disposed on the light emitting side of the backlight module 100. The liquid crystal module is a component composed of a liquid crystal layer, a polarizer, an electrode, etc., and is used to control the passing or not passing of light, thereby displaying an image.

[0058] The liquid crystal module can more accurately control the passing or not passing of light, thereby realizing more delicate and clear image display. Since the liquid crystal module cooperates closely with the backlight module 100, the loss and interference of light in the transmission process are reduced, the brightness and contrast of the display device are improved, which helps to reduce the energy consumption of the display device and prolong the service life.

[0059] The backlight module 100 and the display device provided by the embodiments of the present application, the backlight module 100 includes a back plate 10, a reflection member 20 and a limiting piece 30, the reflection member 20 is stacked with the back plate 10. The back plate 10 is provided with a first through hole 101, the reflection member 20 is provided with a second through hole 201, the limiting piece 30 includes a first limiting part 301, a through part 302 and a second limiting part 303, the through part 302 of the limiting piece 30 is located in the first through hole 101 of the back plate 10 and the second through hole 201 of the reflection member 20, the first limiting part 301 is arranged on the side of the reflection member 20 away from the back plate 10, and the second limiting part 303 is in abutment with the side of the back plate 10 away from the reflection member 20, thereby effectively fixing the relative position of the back plate 10 and the reflection member 20. Above, the limiting piece 30 can replace the adhesive tape in the prior art, so that the installation, maintenance or replacement of the back plate 10 and the reflection member 20 is more reliable and convenient, and the overall production efficiency is greatly improved by simplifying the production process.

[0060] In the above-described embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0061] In the description of the present application, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0062] The backlight module and the display device provided by the embodiments of the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only for helping understanding the present application. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application, and the above description of the present application should not be understood as limiting the present application.

Claims

1. A backlight module, characterized in that, The application relates to a backlight module. The backlight module comprises a back plate, a reflecting member and a limiting member. The back plate is provided with a first through hole. The reflecting member is arranged in a laminated mode with the back plate, and is provided with a second through hole.

2. The backlight module of claim 1, wherein, The limiting member comprises a first limiting part, a penetrating part and a second limiting part.

3. The backlight module of claim 1, wherein, The penetrating part is connected with the first limiting part and the second limiting part respectively.

4. The backlight module of claim 3, wherein, The penetrating part penetrates the first through hole and the second through hole.

5. The backlight module according to any one of claims 1 to 4, wherein, The first limiting part is located on a side of the reflecting member away from the back plate.

6. The backlight module of claim 5, wherein, The second limiting part is in abutment with a side of the back plate away from the reflecting member.

7. The backlight module according to any one of claims 1 to 4, wherein, The second limiting part is bent from one end of the penetrating part.

8. The backlight module of any one of claims 1 to 4, wherein, The second limiting part has a free end away from the penetrating part.

9. The backlight module of any one of claims 1 to 4, wherein, The free end is in abutment with the back plate.

10. A display device, characterized by comprising: The number of the second limiting parts is plural. Each of the plural second limiting parts is connected with the penetrating part and is in abutment with the side of the back plate away from the reflecting member. The number of the penetrating parts is the same as that of the second limiting parts. The plural penetrating parts are connected with the first limiting part. The plural penetrating parts are connected with the plural second limiting parts one by one. The first limiting part is in a rod shape. The first limiting part is arranged in parallel with a plane in which the reflecting member is located. The projection of the first limiting part on the plane in which the reflecting member is located covers the first through hole. A scattering layer is arranged on the surface of the first limiting part. The back plate is provided with a reinforcing rib. The backlight module comprises the back plate, the reflecting member and the limiting member. The backlight module comprises the back plate, the reflecting member and the limiting member.

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