Backlight module and display equipment

Abstract

The utility model discloses a backlight module which comprises a back plate, a light bar and a reflector plate. The lamp strip comprises a lamp panel installed on the back plate, a light-emitting part arranged on the lamp panel and a lens arranged on the outer side of the light-emitting part in a covering mode. The lens comprises a main body part and a compression joint pin protruding out of the outer wall of the main body part. The reflector plate is connected with the back plate, and a through hole corresponding to the lens is formed in the reflector plate; the reflector plate is also provided with an opening and closing seam communicated with the through hole, and the opening and closing seam is arranged opposite to the crimping pin; wherein the radius of a circumcircle passing through the outer edge of the crimping pin is larger than the aperture of the through hole, so that the crimping pin can penetrate through the opening and closing seam in the assembling process, and a part of structure at the peripheral edge of the through hole of the reflector plate is clamped between the lamp panel and the crimping pin. According to the technical scheme, the production cost of the backlight module can be reduced.

Description

Technical Field

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

[0002] As display devices are constantly updated, they are becoming more and more popular due to their lightness, thinness and low power consumption. The display screen of a liquid crystal display device itself does not emit light, and in order to realize the display function of the display screen, the liquid crystal display panel requires a backlight module to provide light source.

[0003] In related technology, backlight modules are categorized as direct-lit and edge-lit, depending on the location of the light source. Typically, the light source in a direct-lit backlight module is located on the backplane, and optical components transform the point light source into a uniform surface light source, driving the LCD screen for a uniform display. However, the backlight in a direct-lit backlight module uses screws or mechanical fastening to directly or indirectly secure the lens and reflector. This approach is not only inefficient but also expensive. Utility Model Content

[0004] The embodiments of the present application provide a backlight module, which can reduce the production cost of the backlight module.

[0005] In the first aspect, an embodiment of the present application provides a backlight module, which includes a back panel, a light strip and a reflective sheet; the light strip includes a light panel mounted on the back panel, a light-emitting component arranged on the light panel and a lens covered on the outside of the light-emitting component, the lens includes a main body and a press-fit foot protruding from the outer wall of the main body; the reflective sheet is connected to the back panel, and the reflective sheet is provided with a through hole corresponding to the lens; the reflective sheet also has an opening and closing seam connected to the through hole, and the opening and closing seam is arranged to align the press-fit foot; wherein, the radius of the circumscribed circle passing through the outer edge of the press-fit foot is greater than the aperture of the through hole, so that the press-fit foot can pass through the opening and closing seam during the assembly process, and part of the structure at the periphery of the through hole of the reflective sheet is clamped between the light panel and the press-fit foot.

[0006] In some embodiments, the opening and closing seam extends in a direction away from the through hole.

[0007] In some embodiments, the opening and closing seam extends in a direction away from the center of the through hole.

[0008] In some embodiments, a plurality of press-fitting feet are provided and are evenly spaced around the circumference of the main body. A plurality of opening and closing seams are also provided and are arranged one-to-one corresponding to the press-fitting feet.

[0009] In some embodiments, the plurality of opening and closing slits have the same length.

[0010] In some embodiments, the width of the opening and closing seam is 1 mm to 2 mm.

[0011] In some embodiments, the radius of the circumscribed circle passing through the outer edge of the press-fit foot is 0.2 mm to 0.4 mm larger than the radius of the through hole.

[0012] In some embodiments, the radius of the circumscribed circle passing through the outer edge of the press-fit foot is 0.3 mm larger than the radius of the through hole.

[0013] In some embodiments, the reflective sheet is connected to the back plate by at least one of snap connection, bonding, and screw connection.

[0014] In a second aspect, an embodiment of the present application provides a display device, which includes a display screen and a backlight module as described in any one of the above items, wherein the backlight module is connected to the rear side of the display screen.

[0015] In the backlight module of the embodiment of the present application, the reflector sheet further includes an opening and closing seam that connects to the through-hole. The opening and closing seam is aligned with the press-fit foot, and the radius of the circumscribed circle passing through the outer edge of the press-fit foot is larger than the diameter of the through-hole. This allows the press-fit foot to pass through the opening and closing seam during assembly, and allows a portion of the structure around the through-hole of the reflector sheet to be sandwiched between the light board and the press-fit foot. This arrangement secures the through-hole wall of the reflector sheet between the light board and the press-fit foot, preventing the reflector sheet from warping at this location and the generation of light shadows, thereby ensuring a good viewing experience.

[0016] During the assembly process, when the main body of the lens is passing through the through hole, since the radius of the circumscribed circle passing through the outer edge of the press-fit foot is greater than the aperture of the through hole, the press-fit foot of the lens is squeezed against the hole wall of the through hole to form an interference fit, so that the opening and closing seam set for the press-fit foot is squeezed and opened. After the main body of the lens is passing through the through hole, the opening and closing seam is closed, and the edge of the hole wall of the through hole is clamped between the light board and the press-fit foot, that is, part of the structure of the reflector is clamped between the light board and the press-fit foot, thereby realizing the clamping limit between the reflector, the lens and the back plate, facilitating the installation operation, thus eliminating the need for multiple people to position the reflector and the lens one by one and apply force to clamp them, reducing labor costs. By providing the opening and closing seam, the process of the lens passing through the through hole can be made easier to operate, and irreversible deformation around the through hole will not occur when passing through the through hole, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1This is a schematic diagram of the structure in which the reflector and the light bar are installed on the back panel in the related art;

[0019] Figure 2 This is a structural diagram of an embodiment of a backlight module of the present application;

[0020] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A shown in FIG.

[0021] Description of Figure Numbers:

[0022] 1. Backlight module; 10. Back panel; 20. Light bar; 21. Lens; 211. Main body; 212. Press-fit pin; 22. Light board; 30. Reflector; 31. Through hole; 32. Opening and closing seam.

[0023] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0025] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0026] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0028] As display devices continue to evolve, they are becoming increasingly popular due to their lightness, thinness, and low power consumption. Liquid crystal display devices (LCDs) do not emit light themselves, so to achieve their display function, the LCD panel requires a backlight module to provide light. Therefore, the backlight module is one of the key components of LCDs.

[0029] In related technologies, backlight modules are categorized as direct-lit and edge-lit, depending on the location of the light source. Typically, the light source in a direct-lit backlight module is located on the backplane, and optical components transform the point light source into a uniform surface light source, driving the LCD screen for a uniform display. However, direct-lit backlight modules employ screws or mechanical fastening to directly or indirectly secure the lens and reflector. This approach results in low production efficiency and high production costs.

[0030] like Figure 1 In the related art shown, when the reflector 30 is mounted on the back panel 10, double-sided tape or hot-melt pressure-sensitive adhesive is typically used to secure the reflector 30 on the side facing the back panel 10. However, since the reflector 30 needs to have through-holes 31 for the lens 21 to pass through, the double-sided tape will break at the corresponding through-holes 31, making the double-sided tape a non-integral structure and reducing the stability and integrity of the bonding. To prevent the edges of the reflector 30 with through-holes 31 formed therein from warping and forming light shadows due to the spacing of the double-sided tape, the reflector 30 and the lens 21 are secured together through a mechanical snap-fit. Specifically, a convex corner is first designed on the lens 21. After the reflector 30 and the PCB are stacked, the convex corner is pressed against the edge of the through-hole 31 to secure the reflector 30, thereby completing the installation of the reflector 30.

[0031] This arrangement prevents the reflective sheet 30 from partially tilting up to form a light shadow, which in turn affects the viewing effect. However, this solution requires multiple manual operations to press and engage them one by one to ensure the accuracy of the mechanical engagement. This operation is complicated and time-consuming. If too many light-emitting components are used in this solution, it will result in a huge waste of manpower, extremely high labor cost investment and impact on production efficiency, and greater difficulty in maintenance, resulting in higher after-sales costs for the product.

[0032] Alternatively, to save labor, the radius of the through hole 31 of the reflector 30 is set larger than the radius of the lens 21. As a result, there is a gap between the wall of the through hole 31 of the reflector 30 and the outer periphery of the lens 21. This solution is prone to causing an area on the side where the reflector 30 is connected to the back plate 10 without double-sided tape, causing the reflector 30 to directly bulge and cast a shadow, resulting in poor viewing quality.

[0033] To resolve the above issues, please refer to Figures 1 to 3The present application proposes a backlight module 1 (BLU, Backlight Unite), which is specifically a direct-type backlight module. The backlight module 1 is arranged on a display device, and the display device also includes a display screen. The display screen and the backlight module 1 are arranged relative to each other in the front and rear directions of the display device. The backlight module 1 is used to provide a light source for the display screen. In an embodiment of the present application, the backlight module 1 includes a back panel 10, a light bar 20 and a reflective sheet 30.

[0034] The backplate 10 is typically made of a thin metal or non-metallic sheet material, which can result in a certain lack of stiffness. Therefore, during manufacturing, multiple ribs are typically installed on the side of the backplate 10 facing the display screen, extending horizontally and vertically to enhance the stiffness and strength of the backplate 10. Consequently, when the light bar 20 is mounted on the backplate 10, it's common for the lens 21 to be positioned directly above or diagonally above the ribs, increasing the gap between the reflector 30 and the backplate 10. This gap is formed by the concave cavity between two adjacent ribs and the inner surface of the reflector 30.

[0035] The light bar 20 includes a lens 21, a light-emitting element, and a light board 22. The light board 22 is specifically a PCB (Printed Circuit Board). The light-emitting element is electrically connected to the PCB, and the electrical connection method includes but is not limited to welding, pin plugging, etc. The PCB is used to control the light emission of the light-emitting element. The types of light-emitting elements include but are not limited to lamp beads, light strips, etc. For example, in this embodiment, the light-emitting element can be a plurality of lamp beads, specifically LED lamp beads, which have the characteristics of local energy saving and consumption reduction and are relatively low in cost. The number and arrangement of the lamp beads can be flexibly selected according to actual needs, and this application does not impose any restrictions on this.

[0036] The light panel 22 is mounted on the back panel 10. The lens 21 and the light-emitting element are both mounted on the light panel 22. The lens 21 is an optical element based on the laws of light refraction and is typically made of a transparent material such as glass, crystal, or silicone. The lens 21 can be either a convex lens or a concave lens. A convex lens is thicker in the center than at the edges, while a concave lens is thicker in the opposite direction.

[0037] The lens 21 is arranged on the lamp board 22 and is covered on the outside of the light-emitting component. The light emitted by the light-emitting component will be emitted after being refracted by the lens 21. The lens 21 redistributes the light emitted by the light-emitting component to achieve better light distribution and uniformity, which can increase the light uniformity and increase the light output area, thereby improving the utilization rate of light. This design helps to shorten the light mixing distance and improve the performance of the backlight module 1. At the same time, since the light mixing distance is shortened, the thickness of the backlight module 1 can be greatly reduced, which is particularly important for the market trend of pursuing thin display devices. There are many ways to assemble the lens 21 and the lamp board 22. For example, in this embodiment, the lens 21 is bonded and fixed to the lamp board 22 by glue or double-sided tape. This installation method is simple, the connection is firm and reliable, and it will not cause physical damage (such as punching) to the lamp board 22 and the lens 21. It has high structural strength and low cost.

[0038] The lens 21 includes a main body 211 and a press-fit foot 212 protruding from the outer wall of the main body 211. The main body 211 is used to refract light emitted by the light-emitting element. The press-fit foot 212 can be connected to the light board 22 by means of gluing, screwing, etc., thereby fixing the lens 21 to the light board 22. Specifically, the press-fit foot 212 can protrude from the outer edge of the main body 211 and extend in a direction away from the central axis of the main body 211. The press-fit foot 212 can increase the contact area between the lens 21 and the light board 22, ensuring the stability and reliability of the connection between the two. The protruding shape of the press-fit foot 212 can include, but is not limited to, a convex hump, a boss, or a convex strip. The crimping foot 212 is arranged to protrude from the outer wall of the main body 211, so that when the lens 21 is fixed to the lamp board 22, the protruding structure of the crimping foot 212 can be used to connect with the lamp board 22, and it will not interfere with the specific structure of the main body 211 to affect the refraction effect, avoid direct force on the main body 211, and improve the structural strength.

[0039] The reflective sheet 30 is connected to the back panel 10. After the lens 21 refracts the light emitted by the light-emitting component, the light can then pass through the reflective sheet 30 and be emitted to the front side of the display device. Through the design of the reflective sheet 30, the loss of light in the backlight module 1 can be reduced, so that more light can be effectively utilized, thereby improving the overall performance of the backlight module 1.

[0040] The reflective sheet 30 is connected to the back panel 10 by at least one of a snap-on connection, an adhesive connection, and a screw connection. For example, the reflective sheet 30 facing the back panel 10 is fixed using double-sided tape or a hot-melt pressure-sensitive adhesive. This allows for easy manufacturing and low cost. Alternatively, the reflective sheet 30 and the back panel 10 are each punched with holes and screwed together using connectors such as screws. This provides increased structural strength and prevents the reflective sheet 30 from warping or loosening.

[0041] The reflective sheet 30 is provided with a through hole 31 corresponding to the lens 21. The light-emitting component and the lens 21 covered on the outside of the light-emitting component can be passed through the through hole 31 and exposed from the through hole 31. The reflective sheet 30 of the technical solution of the present application is also provided with an opening and closing seam 32 connected to the through hole 31. The opening and closing seam 32 is arranged to align with the press-fitting foot 212, and the radius of the circumscribed circle passing through the outer edge of the press-fitting foot 212 is greater than the aperture of the through hole 31, so that the press-fitting foot 212 can pass through the opening and closing seam 32 during the assembly process, and part of the structure at the edge of the through hole 31 of the reflective sheet 30 is clamped between the light board 22 and the press-fitting foot 212.

[0042] With this arrangement, the wall of the through hole 31 of the reflective sheet 30 is fixed between the lamp board 22 and the press-fit foot 212, thereby preventing the reflective sheet 30 from warping at that location and preventing the generation of lamp shadows, thereby ensuring a good viewing experience. During the assembly process, when the main body 211 of the lens 21 is passing through the through hole 31, since the radius of the circumscribed circle passing through the outer edge of the pressing foot 212 is greater than the aperture of the through hole 31, the pressing foot 212 of the lens 21 is squeezed with the hole wall of the through hole 31 to perform an interference fit, so that the opening and closing seam 32 set for the pressing foot 212 is squeezed and opened. After the main body 211 of the lens 21 passes through the through hole 31, the opening and closing seam 32 is closed, and the edge of the hole wall of the through hole 31 is stuck between the lamp board 22 and the pressing foot 212, so that part of the structure of the reflector 30 is clamped between the lamp board 22 and the pressing foot 212, thereby realizing the clamping limit between the reflector 30, the lens 21 and the back panel 10, facilitating the installation operation. In this way, there is no need for multiple people to position and force the reflector 30 and the lens 21 one by one, reducing labor costs. The provision of the opening and closing slit 32 can make the process of the lens 21 passing through the through hole 31 easier to operate, and will not cause irreversible deformation around the through hole 31 when passing through the through hole 31, thereby reducing production costs.

[0043] Moreover, during the process of the light-emitting element emitting light, the heat emitted will cause the reflective sheet 30 to be deformed by heat. Since the reflective sheet 30 also has an opening and closing slit 32 connected to the through hole 31, the stress generated by the thermal deformation of the reflective sheet 30 will be released through the opening and closing slit 32, thereby avoiding deformation and causing the reflective sheet 30 to bulge, thereby avoiding the lamp shadow caused by the bulging of the reflective sheet 30. For the reflective lens, the utilization rate of light can be increased by about 2%, and at the same time, the reflective sheet 30 can be prevented from bulging and exerting pressure on the lens 21, thereby preventing the lens 21 from falling off.

[0044] On this basis, even if the lens 21 is located exactly at the rib position of the back panel 10, resulting in a large gap between the reflective sheet 30 and the back panel 10 and a light leakage defect, since part of the structure of the reflective sheet 30 is clamped between the light board 22 and the press-fit pin 212, the gap between the reflective sheet 30 and the lens 21 can be reduced, thereby effectively reducing the amount of light leakage and avoiding the generation of vertical and horizontal shadows on the entire machine, thereby achieving the purpose of improving and enhancing the display effect.

[0045] The reflective sheet 30 can be made of materials such as PET (polyethylene glycol terephthalate), which can reduce light loss and effectively utilize light through its high reflectivity, thereby improving the light efficiency of the backlight module 1. PET has excellent physical and mechanical properties, good flexibility and tensile strength, and is crack-resistant. During the opening and closing process of the opening and closing seam 32, it can ensure that the opening and closing seam 32 will not further crack due to excessive stress, thereby ensuring structural stability and ensuring stability and reliability for long-term use.

[0046] Please refer again Figure 2 and Figure 3 In some embodiments, the opening and closing slits 32 extend away from the through-hole 31. This disperses the forces acting on the opening and closing slits 32 during assembly, preventing excessive local stress from being concentrated along the opening and closing slits 32, which could cause material failure under relatively small external forces and reduce the load-bearing capacity of the opening and closing slits 32. When multiple opening and closing slits 32 are provided, each opening and closing slit 32 can extend in the same or different directions away from the through-hole 31.

[0047] Specifically, the through hole 31 can be circular, square, oval, or other irregular shapes. In the embodiment of the present application, the through hole 31 is circular, and the opening and closing slit 32 is on the same straight line as the center of the through hole 31, that is, the opening and closing slit 32 extends in a direction away from the center of the through hole 31. This can make the structure of each opening and closing slit 32 the same size, and the stress generated is more balanced. To further disperse the stress, when specifically designing the shape of the opening and closing slit 32, it can be formed by cutting along the radius of the through hole 31. This arrangement can make the stress distribution more uniform, avoid deformation caused by localized concentrated stress, and facilitate production and manufacturing. The shape is regular and does not require excessive measurement. During production, it is easy to align with the press-fit pin 212 on the lens 21, thereby reducing production costs.

[0048] In some embodiments, the number of crimping feet 212 can be one or more. In one embodiment of the present application, multiple crimping feet 212 are provided and are evenly spaced around the circumference of the main body 211. Multiple opening and closing seams 32 are also provided and correspond one-to-one to the crimping feet 212. For example, the crimping feet 212 and the opening and closing seams 32 are both provided to be 3, 4, 5, etc., thereby achieving uniform distribution of stress around the main body 211 and avoiding fatigue damage caused by excessive stress concentration. During the assembly process, multiple crimping feet 212 and the opening and closing seams 32 correspond one-to-one, thereby improving the crimping reliability and uniformity of the lens 21 to the reflector 30, avoiding warping of one side of the reflector 30 due to lack of constraint, and thus avoiding the generation of lamp shadows.

[0049] In some embodiments, the lengths of the multiple opening and closing slits 32 are the same, which can ensure that the stress generated by each opening and closing slit 32 during the opening and closing process is more balanced, ensuring consistency in the force applied. This can also simplify the manufacturing process, improve production efficiency, and thus reduce production costs. Of course, the shapes of the multiple opening and closing slits 32 can be the same or different. For example, the opening and closing slits 32 can be straight or arcuate. The shape, structure, and arrangement of the opening and closing slits 32 can be flexibly selected according to actual needs to meet different product styles and installation and processing requirements.

[0050] In some embodiments, the width of the opening and closing seam 32 is 1 mm to 2 mm. During the assembly process, the outer edge of the press-fit foot 212 needs to be interference-fitted with the wall of the through hole 31, so that the opening and closing seam 32 can be opened, so that the press-fit foot 212 can pass through the opening and closing seam 32 during the assembly process, and part of the structure of the reflector 30 is sandwiched between the light board 22 and the press-fit foot 212. Therefore, the width of the opening and closing seam 32 should not be designed to be too large, that is, greater than 2 mm. In this way, when subjected to external force, the press-fit foot 212 will easily pass through the opening and closing seam 32 again, causing the structure to detach. If the width of the opening and closing seam 32 is designed to be too small, it will make it difficult to open the opening and closing seam 32 during the assembly process, increasing the difficulty of assembly. A too small width will also increase the difficulty of production and manufacturing, thereby increasing costs. Therefore, the width of the opening and closing seam 32 can be selected to be 1 mm, 1.5 mm, 1.7 mm, or 2 mm, etc., and this application does not impose any restrictions on this.

[0051] In some embodiments, the radius of the circumscribed circle passing through the outer edge of the crimping foot 212 is 0.2 mm to 0.4 mm larger than the radius of the through hole 31. During the assembly process, the outer edge of the crimping foot 212 can be interference fit with the hole wall of the through hole 31, thereby opening the opening and closing seam 32, facilitating assembly, and reducing the opening size of the through hole 31, thereby reducing the risk of warping at the through hole 31, avoiding the generation of lamp shadows and increasing the reflective light rate, thereby improving the viewing effect. When the radius of the circumscribed circle passing through the outer edge of the crimping foot 212 is greater than 0.4 mm compared with the radius of the through hole 31, the stress received by the opening and closing seam 32 during squeezing and opening and closing will be greatly increased, which will increase the difficulty of interference fit between the outer edge of the crimping foot 212 and the hole wall of the through hole 31, thereby increasing labor costs; when the radius of the circumscribed circle passing through the outer edge of the crimping foot 212 is less than 0.2 mm compared with the radius of the through hole 31, the outer edge of the crimping foot 212 and the hole wall of the through hole 31 cannot be squeezed against each other to achieve interference fit, and the opening and closing seam 32 cannot be squeezed to open and close, which increases the difficulty of installation and thus increases labor costs.

[0052] Specifically, the radius of the circumscribed circle passing through the outer edge of the press-fit foot 212 is 0.3 mm larger than the radius of the through hole 31. This arrangement makes the radius of the through hole 31 smaller and ensures that during the assembly process, the outer edge of the press-fit foot 212 and the hole wall of the through hole 31 can have a certain interference fit relationship, so that the opening and closing seam 32 can be smoothly opened to allow the reflector 30 to be clamped between the back panel 10 and the lens 21, while avoiding the gap between the reflector 30 and the lens 21 being too large, which leads to an increase in light leakage.

[0053] This application also provides a display device, which may be an interactive tablet. The display device includes a display screen and a backlight module 1. The specific structure of the backlight module 1 is similar to that of the above-mentioned embodiments. Since the present display device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be detailed here.

[0054] Among them, the backlight module 1 is connected to the back side of the display screen, and the display screen can be a liquid crystal display (LCD), a plasma display panel (PDP), an active matrix organic electroluminescent display (AMOLED), etc. When the display screen in the embodiment of the present application is a liquid crystal display screen, its working principle is that there are control circuits and drive circuits around the liquid crystal material. When the electrodes in the liquid crystal display screen generate an electric field, the liquid crystal molecules will be twisted, thereby regularly refracting the light passing through it (the optical rotation of the liquid crystal material), and then being filtered by the polarizer and displayed on the screen, thereby realizing the display of the image.

[0055] However, because liquid crystal molecules themselves do not emit light, displays typically require an additional backlight source. This primary light source system is referred to as a backlight module 1. Backlight module 1 is used to provide sufficient brightness and evenly distributed light to enable the display screen to properly display images. Currently, the primary backlight sources used in liquid crystal displays include cold cathode fluorescent lamps (CCFLs) and light emitting diodes (LEDs). LEDs, due to their advantages such as high brightness, high color purity, long life, excellent reliability, and lack of mercury pollution, are gradually becoming an increasingly popular backlight source.

[0056] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0057] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A backlight module, characterized in that: include: Back panel; A light bar comprising a light board mounted on the back panel, a light emitting element provided on the light board, and a lens covering the outside of the light emitting element, wherein the lens comprises a main body and a press-fit foot protruding from an outer wall of the main body; and A reflective sheet connected to the back plate, the reflective sheet having a through hole corresponding to the lens; the reflective sheet also having an opening and closing seam connected to the through hole, the opening and closing seam being arranged in alignment with the press-fit pin; Among them, the radius of the circumscribed circle passing through the outer edge of the crimping foot is larger than the aperture of the through hole, so that the crimping foot can pass through the opening and closing seam during the assembly process, and part of the structure at the periphery of the through hole of the reflector plate is clamped between the light board and the crimping foot.

2. The backlight module according to claim 1, wherein: The opening and closing seam extends in a direction away from the through hole.

3. The backlight module according to claim 2, wherein: The opening and closing seam extends in a direction away from the center of the through hole.

4. The backlight module according to claim 2, wherein: The pressing feet are provided in plurality and are evenly spaced around the circumference of the main body. The opening and closing seams are also provided in plurality and are arranged in one-to-one correspondence with the pressing feet.

5. The backlight module according to claim 4, wherein: The lengths of the plurality of opening and closing seams are the same.

6. The backlight module according to any one of claims 1 to 5, wherein: The width of the opening and closing seam is 1 mm to 2 mm.

7. The backlight module according to any one of claims 1 to 5, wherein: The radius of the circumscribed circle passing through the outer edge of the pressing foot is 0.2 mm to 0.4 mm larger than the radius of the through hole.

8. The backlight module according to claim 7, wherein: The radius of the circumscribed circle passing through the outer edge of the pressing foot is 0.3 mm larger than the radius of the through hole.

9. The backlight module according to any one of claims 1 to 5, wherein: The reflective sheet is connected to the back plate by at least one of a clamping connection, a bonding connection, and a screw connection.

10. A display device, characterized in that: include: Display screen; as well as The backlight module according to any one of claims 1 to 9, wherein the backlight module is connected to the rear side of the display screen.

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