Backlight module and display device

Abstract

The utility model provides a backlight module and a display device. The backlight module comprises a back plate, a light guide plate and a light guide plate, the lamp panel is arranged on the back plate; the reflecting piece is arranged on the lamp panel, and a positioning hole is formed in the reflecting piece; the positioning piece comprises a base and a positioning column, the base is fixed to the back plate or the lamp panel, the positioning column is detachably connected to the base, and the positioning column penetrates through the positioning hole of the reflecting piece so as to limit the assembling position of the reflecting piece. The positioning piece in the backlight module can give consideration to the precise positioning of the reflecting piece and the display quality of the display device.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a backlight module and a display device. Background Technology

[0002] In the development of optical systems for display devices, the positioning and assembly technology of reflectors is crucial to optical performance and cost control, and has always been a focus of industry attention. Three-dimensional reflectors, due to their unique materials and meticulously designed three-dimensional shapes, have become a research hotspot in the field of optical technology. In practical applications, they can efficiently reflect light from LED chips, precisely control the light propagation path, optimize the uniformity of light distribution, and significantly improve the brightness levels and color reproduction accuracy of television images. Simultaneously, their three-dimensional structure can support diaphragms or diffusers, replacing traditional lamp support structures, reducing the number of optical system components, and lowering overall manufacturing costs.

[0003] However, positioning and assembly face challenges when three-dimensional reflectors replace traditional lamp supports. Due to their complex three-dimensional shape, precise positioning using conventional simple mechanical contact is difficult. If fixtures are used for positioning, they may lift up the diaphragm or diffuser plate. The flatness of the diaphragm is crucial to the display effect; lifting it will change the light path, causing problems such as bright spots, dark areas, color shift, and image distortion.

[0004] Therefore, how to balance the precise positioning of the reflector with the guarantee of display quality has become a key issue that urgently needs to be addressed. Utility Model Content

[0005] This application provides a backlight module and a display device, wherein the positioning component in the backlight module can balance the precise positioning of the reflector with the display quality of the display device.

[0006] This application provides a backlight module, including:

[0007] Back panel;

[0008] A light panel, wherein the light panel is disposed on the back panel;

[0009] A reflector is disposed on the lamp panel, and a positioning hole is provided on the reflector;

[0010] The positioning component includes a base and a positioning post. The base is fixed to the back plate or the lamp plate, and the positioning post is detachably connected to the base. The positioning post passes through the positioning hole of the reflector to define the assembly position of the reflector.

[0011] In some embodiments, the base is provided with a threaded hole, and one end of the positioning post is provided with an external thread. The positioning post is connected to the threaded hole through the external thread to form a threaded engagement.

[0012] In some embodiments, the base is provided with a limiting groove, and one end of the positioning post is provided with a snap-fit ​​part that matches the limiting groove. The snap-fit ​​part is embedded in the limiting groove to form a plug-in connection.

[0013] In some embodiments, the limiting groove is a cross-shaped groove, and the periphery of the snap-fit ​​portion is provided with a protruding structure that matches the cross-shaped groove.

[0014] In some embodiments, the base and the positioning post are integrally formed through a preset fracture zone, which is configured to fracture under lateral force to separate the base and the positioning post.

[0015] In some embodiments, the reflector is formed by an array of multiple lamp cup units, each of which has a reflective cavity, and adjacent lamp cup units are connected to form a connecting ridge, with the positioning hole located on the connecting ridge.

[0016] In some embodiments, the reflector further has a protrusion, which is a hollow structure, and is disposed on the connecting ridge line. The protrusion is disposed on the side of the reflector having the reflective cavity, and the positioning hole is disposed on the protrusion.

[0017] In some embodiments, the inner wall of the protrusion is provided with a guide slope, and the end of the positioning post away from the base is a tapered end, which matches the guide slope.

[0018] In some embodiments, the number of positioning holes is at least two, and the two positioning holes are spaced apart.

[0019] This application embodiment also provides a display device, including:

[0020] Back panel module, wherein the backlight module is the aforementioned backlight module;

[0021] The display panel is disposed on the light-emitting side of the backlight module.

[0022] The backlight module and display device provided in this application include a backplate, a lamp plate, a reflector, and a positioning component. The reflector is disposed on the lamp plate and has a positioning hole. The positioning component includes a base and a positioning post. The base is fixed to the backplate or the lamp plate, and the positioning post is detachably connected to the base. The positioning post passes through the positioning hole of the reflector to define the assembly position of the reflector. After the positioning and assembly of the reflector are completed, the positioning post can be removed from the base, thereby avoiding the risk of the positioning post lifting the diaphragm or diffuser plate. Therefore, the positioning component in this backlight module can balance the accurate positioning of the three-dimensional reflector with the display quality of the display device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a first structure of a backlight module provided in an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of a second structure of the backlight module provided in an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of a first structure of the positioning element provided in an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the first structure of the positioning column provided in the embodiments of this application.

[0028] Figure 5 This is a schematic diagram of the first structure of the base provided in an embodiment of this application.

[0029] Figure 6 This is a schematic diagram of a first cross-sectional structure of the positioning element provided in the embodiments of this application.

[0030] Figure 7 This is a schematic diagram of a second structure of the positioning element provided in an embodiment of this application.

[0031] Figure 8 This is a schematic diagram of a second structure of the positioning column provided in an embodiment of this application.

[0032] Figure 9 This is a schematic diagram of a second structure of the base provided in an embodiment of this application.

[0033] Figure 10 This is a schematic diagram of a second cross-sectional structure of the positioning element provided in the embodiments of this application.

[0034] Figure 11 This is a schematic diagram of a third structure of the positioning element provided in an embodiment of this application.

[0035] Figure 12 This is a schematic diagram of the structure of the reflector provided in an embodiment of this application.

[0036] Figure 13 for Figure 12 A magnified schematic diagram of part A. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] In backlight modules, precise positioning of reflectors is fundamental to achieving high-quality optical performance. If a reflector is misaligned during assembly, the direction of light reflection will change, preventing the light from being evenly projected onto subsequent optical films. For example, if a reflector shifts horizontally, some light rays may deviate from their intended reflection path, resulting in increased light intensity in some areas and decreased intensity in others. This leads to noticeable uneven brightness on the display, severely impacting display quality. If a reflector rotates, the angle of light reflection will change, further disrupting the uniformity of light and potentially preventing some light rays from reaching the display panel, causing dark areas or missing image information on the screen.

[0039] To address the aforementioned technical problems, this application provides a backlight module and a display device, wherein the positioning component in the backlight module can balance the precise positioning of the reflector with the display quality of the display device. The following is a detailed description in conjunction with the accompanying drawings.

[0040] Please see Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of a first structure of a backlight module provided in an embodiment of this application. Figure 2 This is a schematic diagram of a second structure of the backlight module provided in an embodiment of this application.

[0041] In a backlight module 100 provided in this application embodiment, the backlight module 100 includes a back plate 10, a lamp plate 20, a reflector 30, and a positioning member 40.

[0042] The backlight module 100 is a key component of the display device, its function being to provide a uniform, stable, and sufficiently bright light source for the display panel. The display panel itself does not emit light; it relies on the light emitted by the backlight module 100 to pass through the liquid crystal molecules to display images. The performance of the backlight module 100 directly affects the display parameters of the liquid crystal display device, such as brightness, contrast ratio, and color uniformity. Common types of backlight modules 100 include direct-lit backlight modules and edge-lit backlight modules. The backlight module 100 in this embodiment is exemplified as a direct-lit backlight module.

[0043] The backplate 10 provides robust physical support for the entire light source system. The backplate 10 also functions as a heat dissipation unit. During operation, the light source generates a significant amount of heat; if this heat cannot be dissipated promptly, the light source temperature will rise, affecting its luminous efficiency, lifespan, and color stability. The backplate 10 typically undertakes a crucial heat dissipation task, and its heat dissipation performance is improved through optimized material and structural design. To support heat dissipation, the backplate 10 is designed with heat dissipation fins, ventilation holes, or employs heat pipe cooling technology. Heat dissipation fins increase the surface area of ​​the backplate 10, accelerating heat dissipation; ventilation holes promote airflow, improving heat dissipation efficiency.

[0044] The lamp panel 20 is stacked on the back panel 10. The lamp panel 20 is the actual platform supporting the light source, on which multiple light-emitting units, such as light-emitting diodes (LEDs) or other types of light sources, are arranged. The design of the light source layout directly affects the brightness uniformity, contrast, and color performance of the displayed image. In the backlight module 100, the LED chips on the lamp panel 20 are usually arranged in a matrix. By precisely controlling the brightness and color of each LED chip, high-precision local dimming can be achieved, improving the dynamic contrast and black purity of the image.

[0045] The reflector 30 is generally made of a material with high reflectivity, such as a silver or aluminum reflective film plated on a polyethylene terephthalate (PET) substrate. Its function is to reflect the light emitted by the light-emitting unit in a specific direction, thereby improving the utilization rate of light. In the backlight module 100, the reflector 30 can reduce light leakage, allowing more light to be concentrated and projected onto the subsequent film 60, thereby improving the brightness of the backlight module 100.

[0046] A reflector 30 is mounted on the lamp plate 20, and a positioning hole 31 is provided on the reflector 30. The main function of the positioning hole 31 is to cooperate with the positioning element 40 to achieve precise positioning of the reflector 30 on the lamp plate 20. Through the precise matching of the positioning hole 31 and the positioning element 40, it can be ensured that the reflector 30 will not have positional deviations such as offset or rotation during assembly, and that the relative positional relationship between the reflector 30 and the lamp plate 20 meets the design requirements, thereby ensuring the subsequent optical performance. This reflector 30 can support the diffuser plate 50 and / or the diaphragm 60, and can replace the traditional lamp support structure, reducing the number of optical system components and lowering the overall manufacturing cost.

[0047] Please continue reading. Figure 1The positioning component 40 includes a base 41 and a positioning post 42. The base 41 is fixed to the back plate 10 or the light panel 20. The positioning post 42 is detachably connected to the base 41 and passes through the positioning hole 31 of the reflector 30 to define the assembly position of the reflector 30. The base 41 provides a stable support foundation for the positioning post 42, which is detachably connected to the base 41. Its size and shape are adapted to the positioning hole 31 on the reflector 30. The positioning post 42 passes through the positioning hole 31 of the reflector 30, defining the assembly position of the reflector 30 through physical constraints, ensuring that the reflector 30 is accurately positioned in three-dimensional space.

[0048] After the positioning and assembly of the reflector 30 are completed, the positioning post 42 can be removed from the base 41. The base 41 is hidden inside the reflector 30 and does not protrude from the surface of the reflector 30, thereby avoiding the risk of the positioning post 42 lifting the diaphragm 60 and / or the diffuser plate 50.

[0049] In this embodiment, the backlight module 100 not only ensures that the diaphragm 60 and diffuser plate 50 can be installed flatly within the backlight module 100, guaranteeing normal light propagation and stable optical performance, but also improves the assembly efficiency and yield of the backlight module 100. In actual production, the design of this detachable positioning component 40 can effectively reduce assembly defects caused by interference from the positioning post 42, thereby reducing production costs and improving production efficiency.

[0050] The base 41 is fixed to the back plate 10 or the lamp panel 20. Specifically, the base 41 can be fixed to the back plate 10 or the lamp panel 20 by welding, plugging, or bonding. Welding offers advantages such as strong connection and good electrical performance, making it suitable for applications with high reliability requirements. Plug-in connection facilitates the installation and removal of the lamp panel 20, making equipment maintenance and repair easier. Bonding can use materials such as thermally conductive adhesive, which not only secures the lamp panel 20 to the back plate 10 but also improves the heat transfer efficiency between them.

[0051] There can be multiple bases 41. In different scenarios, the bases 41 can be selectively fixed to the back plate 10 or the light panel 20. That is, in some cases, all bases 41 are set on the back plate 10; in other cases, all bases 41 are set on the light panel 20; and in still other cases, some bases 41 are set on the back plate 10 and some bases 41 are set on the light panel 20.

[0052] For example, in large display devices such as smart TVs, a common design to achieve a large size and ultra-thin profile is a base 41 fixed to a back panel 10. The back panel 10 is made of aluminum alloy and is formed through stamping and bending processes, providing stable support for the lamp panel 20 and other components. The base 41 is welded to the bottom of the back panel 10, forming a single integrated structure. This design ensures the stability of the TV while achieving an ultra-thin body, meeting consumers' demands for aesthetics and space utilization. Simultaneously, the heat dissipation fins and ventilation holes on the back panel 10 effectively dissipate the heat generated by the lamp panel 20, ensuring long-term stable operation of the TV.

[0053] For example, micro projectors have extremely high requirements for the positional accuracy of the light source and the quality of optical imaging, so a solution where the base 41 is fixed to the lamp board 20 is often used. The lamp board 20 is made of a high-precision printed circuit board (PCB), which integrates multiple LED light sources and driving circuits. The base 41 is fixed to the lamp board 20 through precise machining and assembly processes to ensure the relative positional accuracy between the light source and the optical lens.

[0054] In some embodiments, please refer to Figures 3 to 6 , Figure 3 This is a schematic diagram of a first structure of the positioning element provided in an embodiment of this application. Figure 4 This is a schematic diagram of the first structure of the positioning column provided in the embodiments of this application. Figure 5 This is a schematic diagram of a first structure of the base provided in an embodiment of this application. Figure 6 This is a first cross-sectional structural diagram of the positioning component provided in this application embodiment. The base 41 has a threaded hole 411, and one end of the positioning pin 42 has an external thread 421. The positioning pin 42 is threadedly connected to the threaded hole 411 via the external thread 421. The threaded hole 411 is a specific hole structure formed on the base 41, with internal threads machined on its inner wall. The external thread 421 is a spiral protrusion structure provided at one end of the positioning pin 42, the shape, size, and pitch of which correspond to the threaded hole 411 on the base 41. The external thread 421 and the threaded hole 411 mesh with each other. By rotating the positioning pin 42, it moves along the axial direction of the threaded hole 411, thereby achieving the connection or disassembly of the positioning pin 42 and the base 41.

[0055] Threaded connections offer exceptional stability and reliability. During the assembly of the reflector 30, when the positioning pin 42 is screwed into the threaded hole 411 of the base 41, the tight engagement of the threads generates significant friction and axial force, effectively preventing the positioning pin 42 from loosening or falling off under external forces. For instance, on the assembly line of the backlight module 100, mechanical vibrations and human operation may cause impacts to the positioning pin 40. The threaded connection can withstand these external forces, ensuring that the positioning pin 42 remains firmly fixed to the base 41, providing reliable support for the precise positioning of the reflector 30.

[0056] Compared to traditional snap-fit ​​or interference fit connections, threaded connections are less prone to loosening during long-term use. Snap-fit ​​connections may lose elasticity after repeated assembly and disassembly, leading to a weakened connection; interference fit connections may loosen or break due to stress concentration during assembly. Threaded connections, through precise thread engagement, maintain a stable connection, significantly improving the reliability and lifespan of the backlight module 100.

[0057] The threaded connection also features convenient disassembly. After the reflector 30 is positioned and assembled, it can be easily unscrewed from the threaded hole 411 of the base 41 simply by rotating the positioning post 42 in the reverse direction. This disassembly method is simple to operate, requiring no special tools or complicated procedures, thus improving the assembly efficiency of the backlight module 100. Simultaneously, the threaded connection allows for precise disassembly, ensuring that the positioning post 42 does not damage or interfere with other surrounding components during unscrewing.

[0058] The threaded connection ensures that the positioning post 42 maintains high repeatability even after multiple assembly and disassembly. Because the thread size and shape are precisely designed and machined, the position of the positioning post 42 can be accurately repeated each time it is screwed into the threaded hole 411, provided the rotation angle and force are consistent. This is crucial for the assembly and production process of the backlight module 100, as in actual production, multiple backlight modules 100 often need to be assembled in batches, requiring consistent positioning accuracy for the reflectors 30 in each backlight module 100.

[0059] In this embodiment, the base 41 is provided with a threaded hole 411, and the positioning post 42 is connected to the threaded hole 411 by an external thread 421, which plays a crucial role in the backlight module 100. This design not only achieves a stable, reliable, and convenient detachable connection between the positioning post 42 and the base 41, but also provides strong support for the precise positioning of the reflector 30, while effectively avoiding the risk of the positioning post 42 lifting the diaphragm 60 or the diffuser plate 50.

[0060] In other embodiments, please continue to refer to Figures 7 to 10 , Figure 7 This is a schematic diagram of a second structure of the positioning element provided in an embodiment of this application. Figure 8 This is a schematic diagram of a second structure of the positioning post provided in an embodiment of this application. Figure 9 This is a schematic diagram of a second structure of the base provided in an embodiment of this application. Figure 10 This is a second cross-sectional structural diagram of the positioning component provided in this application embodiment. The base 41 has a limiting groove 412, and one end of the positioning post 42 has a snap-fit ​​portion 422 that matches the limiting groove 412. The snap-fit ​​portion 422 is embedded in the limiting groove 412 to form a plug-in connection. The limiting groove 412 is a specific recessed structure formed on the base 41, designed to provide precise receiving and limiting space for the snap-fit ​​portion 422 of the positioning post 42. The snap-fit ​​portion 422 is a protruding structure provided at one end of the positioning post 42, the shape of which matches the limiting groove 412 on the base 41. When the positioning post 42 is inserted into the base 41, the snap-fit ​​portion 422 can be embedded in the limiting groove 412, achieving connection between the positioning post 42 and the base 41 through shape matching. The repeatability of the plug-in connection allows the positioning post 42 to be disassembled and reassembled multiple times without affecting its connection performance. As long as the snap-fit ​​part 422 and the limiting groove 412 are not damaged, the positioning post 42 can always maintain a precise positioning effect, reducing the maintenance cost and difficulty of the backlight module 100.

[0061] Please continue reading. Figure 9 The limiting groove 412 is a cross-shaped groove, and the periphery of the engaging part 422 is provided with a protruding structure that matches the cross-shaped groove. This design can limit the positioning post 42 from multiple directions. In the horizontal plane, the two mutually perpendicular channels of the cross-shaped groove restrict the movement and rotation of the positioning post 42 in the X-axis and Y-axis directions, respectively, ensuring that the positioning post 42 maintains a stable position in the horizontal direction. In the vertical direction, the supporting effect of the groove wall can prevent the positioning post 42 from wobbling up and down, thereby achieving precise positioning of the positioning post 42 in three-dimensional space.

[0062] In other embodiments, please refer to Figure 11 , Figure 11 This is a schematic diagram of a third structure of the positioning member provided in the embodiments of this application. The base 41 and the positioning post 42 are integrally formed through a preset fracture zone 43. The preset fracture zone 43 is configured to fracture when subjected to lateral force in order to separate the base 41 and the positioning post 42.

[0063] The pre-designed fracture zone 43 is a deliberately designed weak area in the integral structure of the base 41 and the positioning post 42. By changing the geometry, thickness, material, or internal microstructure of the materials, the strength of the pre-designed fracture zone 43 is made significantly lower than that of the main body of the base 41 and the positioning post 42. When subjected to an external force in a specific direction (lateral in this embodiment), the pre-designed fracture zone 43 will fracture preferentially, thereby achieving the separation of the base 41 and the positioning post 42. The design of the pre-designed fracture zone 43 requires precise calculation of its stress threshold to ensure stable connection during normal assembly and use, while reliably fracturing when separation is required.

[0064] Lateral force refers to the force perpendicular to the axis of the positioning post 42. In the assembly and use of the backlight module 100, lateral force may come from mechanical operation, external collision, or lateral pressure applied to the positioning post 42 during specific process steps. The preset fracture zone 43 is specifically configured to fracture when subjected to such lateral force, thereby achieving controllable separation of the base 41 and the positioning post 42, meeting the operational requirements under different production stages or maintenance needs.

[0065] One-piece molding refers to the process where the base 41 and the positioning post 42 are formed into a single structure simultaneously through injection molding, die casting, or other processing techniques during a single manufacturing process. This molding method ensures good initial connection strength and integrity between the base 41 and the positioning post 42, avoiding precision errors and loose connections that can occur when assembling multiple components. The one-piece molded structure also offers better consistency in material distribution and stress transmission, providing a reliable foundation for the precise positioning of the positioning post 42.

[0066] The base 41 and the positioning post 42 are integrally formed through a pre-set fracture zone 43. In the initial state, this structure has extremely high connection strength and stability. The integral forming process eliminates assembly gaps between the base 41 and the positioning post 42, and the material is continuously distributed, effectively resisting various external forces during assembly, such as mechanical vibration and handling impacts. During the assembly stage of the reflector 30, the positioning post 42 can be firmly fixed to the base 41, providing a precise positioning reference for the reflector 30.

[0067] The presence of the pre-set fracture zone 43 allows for controlled separation of the base 41 and the positioning post 42 when needed. When the reflector 30 is positioned and assembled, or when specific maintenance operations are required on the backlight module 100, simply applying an appropriate lateral force to the positioning post 42 will cause the pre-set fracture zone 43 to fracture as designed, thus separating the base 41 from the positioning post 42. This separation method is simple, precise, and will not damage other surrounding components.

[0068] In this embodiment, the base 41 and the positioning post 42 are integrally formed through a preset fracture zone 43. The preset fracture zone 43 breaks when subjected to lateral force to achieve separation. This design has many significant advantages in the backlight module 100. It not only provides a high-strength and stable connection in the initial stage to ensure the accurate positioning of the reflector 30, but also enables controllable separation when needed, avoiding the risk of the positioning post 42 lifting the diaphragm 60 or the diffuser plate 50. At the same time, it simplifies the production process and reduces production costs.

[0069] Please continue reading. Figure 12 , Figure 12 This is a schematic diagram of the structure of the reflector provided in an embodiment of this application. The reflector 30 is formed by an array of multiple lamp cup units 32. The lamp cup unit 32 is the basic building block of the reflector 30, and is usually a groove structure with a certain geometric shape, such as a parabola or ellipsoid. Each lamp cup unit 32 has a reflective cavity 321. The multiple lamp cup units 32 can be integrally formed. Each lamp cup unit 32 includes a bottom wall and a side wall. The bottom wall has a lamp hole, and the light-emitting unit passes through the lamp hole to be disposed in the reflective cavity 321. The side wall is connected to the bottom wall and together forms the reflective cavity 321.

[0070] The internal surface of the reflector 30 undergoes special treatment (such as coating with a high-reflectivity film) to efficiently reflect and focus the light emitted from the light source, causing the light to propagate in a specific direction and improving the utilization rate and optical performance of the light. Multiple lamp cup units 32 are arranged in an array according to a certain pattern to jointly constitute the reflector 30, realizing the reflection and control of light from a large-area light source.

[0071] Please continue reading. Figure 12 as well as Figure 13 , Figure 13 for Figure 12 A magnified schematic diagram of part A. Adjacent lamp cup units 32 are connected to form a connecting ridge line 33. Specifically, the sidewalls of adjacent lamp cup units 32 are connected to form the connecting ridge line 33. It can be understood that the connecting ridge line 33 is the boundary line between adjacent lamp cup units 32, connecting the individual lamp cup units 32 into a whole. The shape, width, and height of the connecting ridge line 33 have a significant impact on the overall performance of the reflector 30. A reasonable design of the connecting ridge line 33 can enhance the structural strength of the reflector 30 while ensuring the independent reflection function of the lamp cup unit 32, avoiding deformation or damage caused by local stress concentration.

[0072] The positioning hole 31 is located on the connecting ridge 33 and is a key structure used to cooperate with the positioning post 42 to achieve precise positioning of the reflector 30. The shape (e.g., circular, square), size, and positional accuracy of the positioning hole 31 directly determine the positioning accuracy of the reflector 30 on the lamp panel 20. Through the precise cooperation between the positioning post 42 and the positioning hole 31, it can be ensured that each lamp cup unit 32 can be accurately aligned with the light source, so that the light reflection path meets the design requirements, thereby improving the overall display quality of the backlight module 100.

[0073] The connecting ridge 33 is located between adjacent lamp cup units 32 and is the boundary area of ​​the lamp cup units 32. It does not directly participate in the light reflection process. Setting the positioning hole 31 on the connecting ridge 33 will not damage the curved surface shape and reflection structure inside the lamp cup unit 32, thereby ensuring that the light can be reflected and focused inside the lamp cup unit 32 according to the designed path.

[0074] During the assembly of the reflector 30 and the lamp panel 20, the positioning post 42, after being inserted into the positioning hole 31, can accurately determine the position and angle of the reflector 30 in the horizontal plane. Due to the structural stability of the connecting ridge 33, the positioning hole 31 is not easily deformed or displaced when subjected to external forces, thus ensuring the accuracy and reliability of positioning. For example, in the backlight module 100 of a precision optical instrument, the positioning accuracy requirement for the reflector 30 is extremely high. The positioning hole 31, located on the connecting ridge 33, can meet this high-precision positioning requirement and ensure that the reflection path of the light is accurate.

[0075] The design of the positioning hole 31 on the connecting ridge 33 also provides flexibility to adapt to different assembly processes. Whether it is manual assembly or automated assembly, the positioning hole 31 on the connecting ridge 33 can provide a clear positioning mark for the positioning post 42. During manual assembly, the operator can intuitively observe the position of the positioning hole 31 and quickly and accurately insert the positioning post 42 into the positioning hole 31.

[0076] When the reflector 30 has only one positioning hole 31, and this positioning hole 31 cooperates with the positioning post 42, although it can restrict the translational movement of the reflector 30 in two perpendicular directions (such as the X-axis and Y-axis) in the plane to a certain extent, it cannot effectively constrain its rotational degree of freedom around the positioning post 42. During the assembly of the backlight module 100, if the reflector 30 rotates, the relative angle between the lamp cup unit 32 and the light source will change, resulting in a deviation in the direction of light reflection.

[0077] There are at least two positioning holes 31, which are spaced apart and cooperate with the corresponding positioning posts 42 to constrain the reflector 30 from two different positions. These two positioning holes 31 are equivalent to two independent fixing points, and together they can effectively restrict the rotational freedom of the reflector 30 in the plane.

[0078] The two spaced positioning holes 31 cooperate with the positioning posts 42 to provide a more stable support structure for the reflector 30. When subjected to external forces, the two positioning points can share the external forces, reducing the force on a single positioning point and lowering the possibility of wobbling or loosening between the positioning holes 31 and the positioning posts 42.

[0079] The positioning holes 31 can be three or more, and their arrangement on the reflector 30 should be asymmetrical, meaning the relative positional relationship between the positioning holes 31 is unique, thus preventing incorrect installation. If the reflector 30 is attempted to be installed in the wrong direction or position, the correspondence between the positioning holes 31 and the positioning posts 42 will be disrupted, making assembly impossible. For example, in a triangular layout, the three positioning holes 31 form a triangle with different side lengths, angles, and other geometric parameters. During assembly, successful assembly is only possible when the reflector 30 is placed in the correct orientation, ensuring a one-to-one correspondence between the three positioning holes 31 and the three positioning posts 42. If the reflector 30 is rotated 180° (i.e., installed in reverse), the positional relationship between the positioning holes 31 and the positioning posts 42 will be mismatched, preventing insertion and thus preventing incorrect assembly.

[0080] In some cases, the reflector 30 also has a protrusion 34, which is a hollow structure. The protrusion 34 is disposed on the connecting ridge 33 and on the side of the reflector 30 with the reflecting cavity 321. The positioning hole 31 is disposed on the protrusion 34. The protrusion 34 has a hollow columnar structure and extends perpendicular to the main plane of the reflector 30. This protrusion 34 facilitates the positioning of the positioning post 42 and improves assembly efficiency.

[0081] The inner wall of the protrusion 34 is provided with a guide slope, which gradually narrows inward from the entrance end of the protrusion 34, that is, the back of the lamp panel 20 with the reflector cavity 321, forming a funnel-shaped opening. The end of the positioning post 42 away from the base 41 is a tapered end, which matches the guide slope. When the positioning post 42 approaches the positioning hole 31, the tapered end first contacts the guide slope. As the positioning post 42 continues to be inserted, the guide slope will gradually guide the positioning post 42 into the center position of the positioning hole 31.

[0082] The tapered end and the guide ramp have an automatic alignment function. Even if there is a certain deviation between the initial position of the positioning pin 42 and the positioning hole 31, the tapered end will automatically slide along the ramp to the correct position after contacting the guide ramp, achieving fast and accurate alignment. This greatly reduces the assembly precision requirements for assemblers and improves assembly efficiency.

[0083] Please continue reading. Figure 2The backlight module 100 also includes a diffuser plate 50, which is disposed on the side of the reflector 30 away from the lamp panel 20. The reflector 30, through reasonable design of its shape, material, and installation method (such as the lamp cup unit 32 mentioned above), possesses sufficient strength and stability to directly support the diffuser plate 50. For example, the reflector 30 can be made of a metal sheet of a certain thickness or a high-strength plastic material, and a specific support structure can be manufactured through a molding process. This reflector 30 can support the diffuser plate 50, replacing the traditional lamp support structure, reducing the number of optical system components, and lowering the overall manufacturing cost.

[0084] Please continue reading. Figure 2 The backlight module 100 also includes a diaphragm 60, which is disposed on the side of the diffuser plate 50 away from the reflector. The backlight module 100 transmits, diffuses, and modulates light through optical elements such as the diffuser plate 50 and the diaphragm 60 to produce uniformly distributed light.

[0085] This application provides a display device. As a communication interface between users and information, the display device has become the mainstream display method due to its superior characteristics such as high space utilization, low electromagnetic interference and no radiation. It is widely used in information communication tools such as televisions, smartphones, and tablets. In this application, the display panel itself does not emit light, but the backlight module 100 provides the light source for the display panel.

[0086] The display device can be at least one of the following: a television set (TV), a smartphone, a tablet computer, a mobile phone, a video phone, an e-book reader, a desktop PC, a laptop PC, a netbook computer, a workstation, a server, a personal digital assistant, a portable multimedia player, an MP3 player, a mobile medical device, a camera, a game console, a digital camera, a car navigation system, an electronic billboard, an ATM, or a wearable device. The display device described in this application is primarily based on a television set as an example.

[0087] The display device includes a backlight module 100 and a display panel. The backlight module 100 is the same as the one described in the above embodiment, and the display panel is disposed on the light-emitting side of the backlight module 100. The light emitted by the backlight module 100 needs to be evenly distributed onto the display panel to ensure the brightness and color uniformity of the displayed image. The backlight module 100 transmits, diffuses, and regulates the light, enabling the light to be evenly distributed across the entire surface of the display panel.

[0088] In the backlight module 100 and display device provided in this application embodiment, the backlight module 100 includes a back plate 10, a lamp plate 20, a reflector 30, and a positioning member 40. The reflector 30 is disposed on the lamp plate 20 and has a positioning hole 31. The positioning member 40 includes a base 41 and a positioning post 42. The base 41 is fixed to the back plate 10 or the lamp plate 20, and the positioning post 42 is detachably connected to the base 41. The positioning post 42 passes through the positioning hole 31 of the reflector 30 to define the assembly position of the reflector 30. After the positioning and assembly of the reflector 30 are completed, the positioning post 42 can be removed from the base 41, thereby avoiding the risk of the positioning post 42 lifting the diaphragm 60 or the diffuser plate 50. Therefore, the positioning member 40 in the backlight module 100 can balance the accurate positioning of the three-dimensional reflector 30 with the display quality of the display device.

[0089] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0090] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0091] The backlight module and display device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A backlight module, characterized in that, include: Back panel; A light panel, wherein the light panel is disposed on the back panel; A reflector is disposed on the lamp panel, and a positioning hole is provided on the reflector; The positioning component includes a base and a positioning post. The base is fixed to the back plate or the lamp plate, and the positioning post is detachably connected to the base. The positioning post passes through the positioning hole of the reflector to define the assembly position of the reflector.

2. The backlight module according to claim 1, characterized in that, The base is provided with a threaded hole, and one end of the positioning post is provided with an external thread. The positioning post is connected to the threaded hole through the external thread to form a threaded engagement.

3. The backlight module according to claim 1, characterized in that, The base is provided with a limiting groove, and one end of the positioning post is provided with a snap-fit ​​part that matches the limiting groove. The snap-fit ​​part is embedded in the limiting groove to form a plug-in connection.

4. The backlight module according to claim 3, characterized in that, The limiting groove is a cross-shaped groove, and the periphery of the snap-fit ​​part is provided with a protruding structure that matches the cross-shaped groove.

5. The backlight module according to claim 1, characterized in that, The base and the positioning post are integrally formed through a preset fracture zone, which is configured to fracture under lateral force to separate the base and the positioning post.

6. The backlight module according to any one of claims 1 to 5, characterized in that, The reflector is formed by an array of multiple lamp cup units, each of which has a reflective cavity. Adjacent lamp cup units are connected to form a connecting ridge, and the positioning hole is located on the connecting ridge.

7. The backlight module according to claim 6, characterized in that, The reflector also has a protrusion, which is a hollow structure. The protrusion is disposed on the connecting ridge line and on the side of the reflector having the reflective cavity. The positioning hole is disposed on the protrusion.

8. The backlight module according to claim 7, characterized in that, The inner wall of the protrusion is provided with a guide slope, and the end of the positioning post away from the base is a tapered end, which matches the guide slope.

9. The backlight module according to any one of claims 1 to 5, characterized in that, The number of positioning holes is at least two, and the two positioning holes are spaced apart.

10. A display device, characterized in that, include: A backlight module, wherein the backlight module is the backlight module according to any one of claims 1 to 9; The display panel is disposed on the light-emitting side of the backlight module.

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