Curved surface backlight module

Abstract

The utility model relates to the technical field of display equipment, and discloses a curved-surface backlight module which comprises a curved-surface die casting, a curved-surface back plate and a side wall arranged along the circumference of the curved-surface back plate, a diffusion plate limiting groove is formed in the inner wall of the side wall, and limiting silica gel is arranged in the diffusion plate limiting groove; the optical assembly comprises a diffusion plate, the diffusion plate comprises a diffusion plate limiting insertion block arranged on one side of the edge, and the diffusion plate limiting insertion block is matched with the limiting silica gel in an inserted mode. By means of the design that all the components are limited and fixed, the structure of the curved-surface backlight module can be stable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to display equipment technical field, concretely relates to a curved surface backlight module. BACKGROUND

[0002] At present, along with the development of display technology, display equipment is no longer limited to the structure of plane display, and the curved surface display structure has better viewing angle experience, but the mold and optical assembly of the curved surface display screen are curved due to its special form, and there may be stress difference between the parts of the curved surface backlight module in the use process, so it is difficult to fully fit.

[0003] The existing curved surface backlight module, especially the large size curved surface backlight module, the large size curved surface diffusion plate inside is prone to shaking and abnormal sound due to the existence of tolerance. During transportation, the relative shaking between the internal structures produces friction and generates chippings, which leads to the entry of chippings and foreign matters into the backlight, and easily affects the display effect of the backlight. UTILITY MODEL CONTENT

[0004] In order to solve the deficiencies of the prior art, the utility model provides a curved surface backlight module, which reduces vibration wear and increases overall structural stability by setting the limiting structure matched between the components.

[0005] The technical effects achieved by the utility model are realized through the following aspects:

[0006] The utility model provides a curved surface backlight module, which comprises:

[0007] The curved surface die casting comprises a curved surface back plate and a side wall arranged along the circumference of the curved surface back plate, an inner wall of the side wall is provided with a diffusion plate limiting groove, and the diffusion plate limiting groove is provided with limiting silica gel.

[0008] The optical assembly comprises a diffusion plate, the diffusion plate comprises a diffusion plate limiting plug-in block arranged on one side of the edge, and the diffusion plate limiting plug-in block is plug-in matched with the limiting silica gel.

[0009] In some implementation modes, the diffusion plate limiting plug-in blocks are multiple, and the multiple diffusion plate limiting plug-in blocks are arranged at intervals.

[0010] In some implementation modes, the diffusion plate is fixedly arranged on the side edge away from the diffusion plate limiting plug-in block through the fixing glue and the curved surface die casting.

[0011] In some implementation modes, the curved surface backlight module further comprises a lamp plate, the curved surface back plate is provided with a lamp plate limiting column, the lamp plate is provided with a lamp plate limiting hole matched with the lamp plate limiting column, and the lamp plate limiting hole is used for positioning the lamp plate on the curved surface die casting.

[0012] In some implementations, the lamp panel comprises a pinhole reflective film and an LED lamp providing light;

[0013] The pinhole reflective film is attached to the lamp panel, and the lamp beads of the LED lamp are located in each pinhole of the pinhole reflective film and pass through to the other side of the pinhole reflective film opposite to the lamp panel.

[0014] In some implementations, the edges of the lamp panel and the curved die casting are fixed by a heat-conducting adhesive.

[0015] In some implementations, the inner side of the side wall is provided with a reflective side film.

[0016] In some implementations, the optical assembly further comprises an optical film, the optical film comprising a film limiting plug, a film limiting groove and a film limiting hole, the inner wall of the side wall further being provided with a U-shaped silica gel groove and a film limiting column, the film limiting plug being matched with the U-shaped silica gel groove, a U-shaped silica gel sleeve being arranged between the film limiting plug and the U-shaped silica gel groove, the film limiting groove and the film limiting hole being matched with the film limiting column.

[0017] In some implementations, the curved backlight module further comprises a middle iron frame, the curved die casting further comprising a clamping groove, a U-shaped groove and a U-shaped limiting groove, the U-shaped limiting groove being provided with a middle iron frame limiting column, the middle iron frame comprising a protrusion, a middle iron frame limiting plug and a Z-shaped bending structure.

[0018] The protrusion is matched with the clamping groove, for clamping and cooperating the middle iron frame with the curved die casting, the middle iron frame limiting plug is matched with the U-shaped groove, the Z-shaped bending structure comprising a limiting hole, the Z-shaped bending structure being inlaid and connected with the U-shaped limiting groove, and the limiting hole is nested on the middle iron frame limiting column.

[0019] In some implementations, the middle iron frame further comprises a wrapping adhesive and the fixing adhesive, the wrapping adhesive being used for connecting the middle iron frame limiting plug with the curved die casting, and the fixing adhesive being arranged between the side wall and the middle iron frame.

[0020] In summary, the present application has at least the following advantages:

[0021] The curved backlight module provided by this utility model uses a diffuser plate that is inserted and fitted into a diffuser plate limiting slot to fix the diffuser plate onto the curved die-cast part. Within the limiting slot, a limiting silicone sealant designed to match the diffuser plate insert securely presses and fixes the diffuser plate, preventing it from loosening or popping up, which could affect the optical performance of the curved backlight module. Furthermore, the limiting silicone sealant acts as a flexible buffer between components, effectively preventing frictional wear and chipping between structures. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of the diffuser plate and the curved die-cast part in Embodiment 1 of this utility model.

[0023] Figure 2 This is a partial structural schematic diagram of the curved die-cast part of Embodiment 1 of this utility model.

[0024] Figure 3 This is an exploded structural diagram of the lamp plate and curved die-cast part of Embodiment 2 of this utility model.

[0025] Figure 4 This is a partial structural diagram of the lamp panel in Embodiment 2 of this utility model.

[0026] Figure 5 This is an exploded structural diagram of the curved backlight module of Embodiment 2 of this utility model.

[0027] Figure 6 This is a schematic diagram of the curved die-cast part according to Embodiment 2 of this utility model.

[0028] Figure 7 This is an exploded structural diagram of the iron frame and curved die-cast part in Embodiment 3 of this utility model.

[0029] Marked in the image:

[0030] 1. Curved die-cast part; 11. Curved back plate; 111. Lamp panel limiting post; 12. Side wall; 121. Diffuser limiting groove; 122. Slot; 123. U-shaped groove; 124. U-shaped limiting groove; 1241. Central iron frame limiting post; 125. Diaphragm limiting post; 126. U-shaped silicone groove; 127. U-shaped silicone sleeve; 15. Reflective side film; 2. Lamp panel; 21. Pinhole reflective film; 22. Thermal conductive adhesive; 23. 1. Lamp beads; 24. Lamp board limiting hole; 3. Optical components; 31. Diffuser plate; 311. Diffuser plate limiting insert; 312. Limiting silicone; 32. Optical diaphragm; 321. Diaphragm limiting insert; 322. Diaphragm limiting groove; 323. Diaphragm limiting hole; 4. Central iron frame; 41. Protrusion; 42. Central iron frame limiting insert; 43. Z-shaped bending structure; 431. Limiting hole; 5. Fixing adhesive; 6. Wrapping adhesive. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. The described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0033] It should be noted that, in order to facilitate the description of the present application, in the following examples and drawings, the coordinate system of Figure 1 is used, and the direction indicated by the arrow of the x-axis is right, the direction indicated by the arrow of the y-axis is front, and the direction indicated by the arrow of the z-axis is up.

[0034] Example 1:

[0035] Please refer to Figures 1-2 , the curved surface backlight module of the present application comprises: a curved surface die casting 1, which comprises a curved surface back plate 11 and a side wall 12 arranged along the circumference of the curved surface back plate 11, an inner wall of the side wall 12 is provided with a diffusion plate limiting groove 121, and a limiting silica gel 312 is arranged in the diffusion plate limiting groove 121; and an optical assembly 3, which comprises a diffusion plate 31, the diffusion plate 31 comprises a diffusion plate limiting plug 311 arranged on one side of the edge, and the diffusion plate limiting plug 311 is plug-in matched with the limiting silica gel 312.

[0036] Specifically, the curved backlight module comprises a curved die casting 1, the bottom of the curved die casting 1 is a curved backboard 11, a side wall 12 is vertically arranged on the circumference of the curved backboard 11, the curved backboard 11 and the side wall 12 are of an integrated structure, and the curved die casting 1 is optionally but not limited to integrally formed by injection molding, so that the structure of the curved die casting 1 is more stable. A diffusion plate limiting plug 311 is arranged on a long edge of a diffusion plate 31, a diffusion plate limiting groove 121 capable of cooperating with the diffusion plate limiting plug 311 is arranged on the curved die casting 1, the diffusion plate limiting groove 121 corresponds to the diffusion plate limiting plug 311 in position, the diffusion plate limiting plug 311 is fixedly inserted into the diffusion plate limiting groove 121, limiting silica gel 312 is arranged in the diffusion plate limiting groove 121, the diffusion plate limiting plug 311 is inserted into the diffusion plate limiting groove 121 through the limiting silica gel 312, and the diffusion plate limiting plug 311 and the limiting silica gel 312 are in interference fit, so that the diffusion plate 31 is fixedly limited in the x-axis, y-axis or z-axis direction, preventing the connection of the diffusion plate 31 from loosening or the diffusion plate 31 from deviating and affecting the overall optical effect.

[0037] In order to cope with the connection of the large-size diffusion plate 31, in some embodiments, the diffusion plate limiting plug 311 is a plurality of diffusion plate limiting plugs 311, the plurality of diffusion plate limiting plugs 311 are arranged at intervals, the number of the diffusion plate limiting plugs 311 on the diffusion plate is optionally but not limited to five, and the five diffusion plate limiting plugs 311 are symmetrically arranged along the long edge center line of the diffusion plate 31. Five diffusion plate limiting grooves 121 for the diffusion plate limiting plug 311 are correspondingly arranged on the side wall 12 of the curved die casting 1. The plurality of diffusion plate limiting plugs 311 are arranged at intervals to facilitate the stress balance of the diffusion plate 31 under compression, so as to avoid uneven stress on the plate surface of the diffusion plate 31 and affect the light output effect of the curved backlight module.

[0038] In some embodiments, the diffusion plate 31 is fixedly abutted with the curved die casting 1 on the side edge away from the diffusion plate limiting plug 311 through the fixing glue 5.

[0039] Specifically, the diffusion plate limiting plug 311 is arranged at the edge of one side of the diffusion plate 31, the diffusion plate limiting plug 311 is used to fixedly insert one side of the diffusion plate 31, and the other side of the diffusion plate 31 is first buckled by static friction, and then the fixing glue 5 is arranged between the diffusion plate 31 and the side wall 12 abutting the curved die casting 1, so as to bond and fix the diffusion plate 31 to the curved die casting 1, thereby limiting and fixing the z-direction of the large-size diffusion plate 31, avoiding the diffusion plate 31 from jumping off and affecting the overall use.

[0040] In the embodiment, the diffusion plate 31 is fixed on the curved surface pressure casting 1 by the diffusion plate limiting plug and the diffusion plate limiting slot 121, and a plurality of diffusion plate limiting plugs 311 are arranged on one side of the diffusion plate 31 in the length direction, so that the plate surface of the diffusion plate 31 is uniformly pressed, the limiting silica gel 312 is arranged in the diffusion plate limiting slot 121, the diffusion plate limiting plug 311 is inserted into the diffusion plate limiting slot 121 through the limiting silica gel 312, the diffusion plate 31 is prevented from falling off from the curved surface pressure casting 1, the limiting silica gel 312 can provide a buffering effect for the diffusion plate 31, and the structure assembly is prevented from being rubbed and falling off, and the fixing glue 5 is arranged on the other side of the diffusion plate 31 in the length direction, so that the diffusion plate 31 is more stable.

[0041] Embodiment 2

[0042] The embodiment is further structure optimization of the curved surface backlight module, please refer to Figures 3-6 .

[0043] In some embodiments, as shown in Figure 3 , the curved surface backlight module further comprises a lamp plate 2, the curved surface back plate 11 is provided with a lamp plate limiting column 111, the lamp plate 2 is provided with a lamp plate limiting hole 24 matched with the lamp plate limiting column 111, and the lamp plate limiting hole 24 is used for positioning the lamp plate 2 on the curved surface pressure casting 1.

[0044] Specifically, the curved surface back plate 11 is provided with the lamp plate limiting column 111, the lamp plate limiting column 111 is used for fixing and limiting the lamp plate 2, the lamp plate 2 is provided with the lamp plate limiting hole 24 at the edge, the lamp plate limiting column 111 on the curved surface pressure casting 1 is arranged in the lamp plate limiting hole 24, the lamp plate 2 is limited and fixed in the x-axis or y-axis direction, and the lamp plate 2 is prevented from being displaced or assembled to be offset during transportation.

[0045] In order to improve the utilization rate of the light source, in some embodiments, as shown in Figure 4 , the lamp plate 2 comprises a small hole reflective film 21 and an LED lamp for providing light; the small hole reflective film 21 is attached to the lamp plate 2, and the lamp beads 23 of the LED lamp are arranged in each small hole of the small hole reflective film 21 and are arranged on the other side of the small hole reflective film 21 opposite to the lamp plate 2.

[0046] Specifically, the MINI LED lamp is arranged on the light-emitting side of the lamp panel 2, and the lamp beads 23 are arranged in an array for packaging. An IC component for controlling the lamp panel 2 is arranged on the back of the lamp panel 2. The IC component is used for partitioned control and display of the MINI LED lamp, so as to improve the dynamic display effect of the light source. A small-pore reflective film 21 is attached to the light-emitting side of the lamp panel 2, so that the lamp beads 23 are located in the small pores of the small-pore reflective film 21. The light emitted by the lamp beads 23 is diffused by the small-pore reflective film 21, so that the light emitted by the LED lamp is more divergent, the utilization rate of the light source is improved, and the phenomenon that the light between adjacent lamp beads 23 is weak and dark areas are easily formed is better improved, so that the emitted light is more divergent and uniform.

[0047] In order to improve the stability of the lamp panel 2, in some embodiments, the edges of the lamp panel 2 and the curved die casting 1 are fixed by the heat-conducting glue 22.

[0048] Specifically, the heat-conducting glue 22 is arranged between the lamp panel 2 and the die casting. The heat-conducting glue 22 not only fixes the lamp panel 2 in the curved die casting 1, but also conducts the heat generated by the lamp panel 2 to the curved die casting 1 in time, and then conducts the heat to the external environment by the curved die casting 1, so as to improve the heat dissipation efficiency, avoid damage to the internal circuit caused by heat accumulation, and increase the service life of the lamp panel 2.

[0049] In some embodiments, the inner side of the side wall 12 is provided with a reflective side film 15.

[0050] Specifically, the reflective side film 15 is attached to the inner side of the side wall 12 of the die casting. The reflective side film 15 is arranged on the four side walls 12, so as to better reflect the light emitted by the lamp panel 2 to the diffusion plate 31 and the optical film 32, avoid brightness loss, improve the utilization rate of the light source, improve the phenomenon that the curved backlight module is dark around, and improve the overall brightness and surface uniformity of the curved backlight module.

[0051] In some embodiments, please refer to Figure 5 and Figure 6 The optical assembly further includes an optical film 32. The optical film 32 includes a film limiting plug 321, a film limiting groove 322, and a film limiting hole 323. The inner wall of the side wall 12 is further provided with a U-shaped silica gel groove 126 and a film limiting column 125. The film limiting plug 321 is matched with the U-shaped silica gel groove 126. A U-shaped silica gel sleeve 127 is arranged between the film limiting plug 321 and the U-shaped silica gel groove 126. The film limiting groove 322 and the film limiting hole 323 are matched with the film limiting column 125.

[0052] Specifically, an optical component 3 is arranged on the light-emitting side above the lamp panel 2. The optical component 3 is arranged with a diffuser plate 31 and multiple optical films 32 in sequence. Film fixing adhesive 5 is attached between each layer of optical films 32 to stick and fix the optical films 32 together, so as to limit and fix the optical films 32 in the z-axis direction and prevent the optical films 32 of the curved backlight module from jumping off in the z-axis direction. The optical films 32 can be selected, but are not limited to, privacy films, brightness enhancement films, light diffusing films and beam splitting films. A film limiting insert 321 is provided at the middle of one long edge of the optical film 32, which is inserted into the U-shaped silicone groove 126 provided on the inner side wall 12 of the curved die-cast part 1 to limit and fix the optical films 32 in the x-axis or y-axis direction, so as to prevent the optical films 32 of the large-size curved backlight module from shifting. A U-shaped silicone sleeve 127 is installed inside the U-shaped silicone groove 126 on the die-cast part, located between the diaphragm limiting insert 321 and the U-shaped silicone groove 126, so that the diaphragm limiting insert 321 on the optical diaphragm 32 is inserted with an interference fit to achieve limiting and fixing. A diaphragm limiting hole 323 is provided at each end of the optical diaphragm 32, and a diaphragm limiting groove 322 is provided at the middle position of the longitudinal edge of the optical diaphragm 32. The diaphragm limiting groove 322 and the diaphragm limiting hole 323 are both nested on the diaphragm limiting post 125 of the curved back plate 11 to limit and fix the optical diaphragm 32 in the x-axis or y-axis direction.

[0053] In this invention's curved backlight module, the optical diaphragm 32 also adopts a similar design to the limiting structure of the diffuser plate 31. A U-shaped silicone sleeve 127 is provided between the diaphragm limiting insert 321 and the U-shaped silicone groove 126 for insertion, limiting, and fixing, making it suitable for the installation and fixing of large-size curved optical components 3. A small-hole reflective film 21 is provided on the lamp plate 2, and a reflective side film 15 is provided around the side wall 12, which improves the utilization rate of the light source and achieves more uniform brightness of the curved backlight module.

[0054] Example 3:

[0055] This embodiment further optimizes the structure of the central iron frame 4 based on the above embodiment. Please refer to [link / reference]. Figure 7 .

[0056] To better secure the optical components, in some embodiments, the curved backlight module further includes a central iron frame 4, and the curved die-cast part 1 further includes a slot 122, a U-shaped groove 123, and a U-shaped limiting groove 124. The U-shaped limiting groove 124 is provided with a central iron frame limiting post 1241. The central iron frame 4 includes a protrusion 41, a central iron frame limiting insert 42, and a Z-shaped bending structure 43. The protrusion 41 is adapted to the slot 122 for engaging the central iron frame 4 with the curved die-cast part 1. The central iron frame limiting insert 42 is adapted to the U-shaped groove 123. The Z-shaped bending structure 43 includes a limiting hole 431. The Z-shaped bending structure 43 is embedded in the U-shaped limiting groove 124, causing the limiting hole 431 to be nested on the central iron frame limiting post 1241.

[0057] Specifically, a central iron frame 4 is provided above the optical component 3. The central iron frame 4 fixes the optical component 3 and the lamp plate 2 to the curved die-cast part 1. The central iron frame 4 and the curved die-cast part 1 are detachably connected. The central iron frame 4 is provided with multiple protrusions 41, which are distributed at intervals on each side of the central iron frame 4. The protrusions 41 are adapted to the slots 122 on the curved die-cast part 1 and achieve snap-fit ​​for limiting and fixing, thereby limiting and fixing the overall structure of the central iron frame 4 in the x-axis, y-axis or z-axis direction. The central iron frame 4 is provided with central iron frame limiting blocks 42 on both short sides. The central iron frame limiting blocks 42 are adapted to the U-shaped grooves 123 on the curved die-cast part 1 and realize insertion limiting and fixing. Five strips of fixing adhesive are provided in the U-shaped grooves 123 to bond and fix the central iron frame limiting blocks 42 in the U-shaped grooves 123, so as to limit and fix the central iron frame 4 in the z-axis direction and prevent the central iron frame 4 from loosening. The central iron frame 4 has Z-shaped bending structures 43 on both sides along its length, which are inserted into the U-shaped limiting grooves 124 on the curved die-cast part 1. The hollow part of the Z-shaped bending structure 43 is a limiting hole 431, which is nested on the central iron frame limiting post 1241 in the U-shaped limiting groove 124. In addition, the Z-shaped bending structure fixing adhesive is provided on the U-shaped limiting groove 124 to bond and fix the Z-shaped bending structure 43 on the central iron frame 4, thereby achieving limiting and fixing of the central iron frame 4 in the x-axis, y-axis or z-axis direction. This avoids the central iron frame 4 from drooping outward due to its thin or soft structure, which would affect the optical effect and structural stability of the curved backlight module.

[0058] In some embodiments, the central iron frame 4 further includes an adhesive 6 and a fixing adhesive 5. The adhesive 6 is used to connect the central iron frame limiting block 42 and the curved die-cast part 1, and the fixing adhesive 5 is disposed between the side wall 12 and the central iron frame 4.

[0059] Specifically, a fixing adhesive 5 is provided between the central iron frame 4 and the inner side wall 12 of the curved die-cast part 1 to bond and fix the central iron frame 4 to the curved die-cast part 1, thereby fixing the central iron frame 4 in the z-axis direction and preventing it from loosening. An adhesive 6 is provided above the central iron frame limiting block 42 to connect the central iron frame limiting block 42 and the curved die-cast part 1, limiting and fixing the central iron frame 4 in the z-axis direction and preventing it from loosening or warping. Of course, the fixing adhesive 5 and the adhesive 6 can also be implemented in other ways to achieve a better fixing effect on the central iron frame 4; this application does not limit this.

[0060] In this embodiment, the frame of the central iron frame 4 is provided with a protrusion 41, a central iron frame limiting block 42, and a Z-shaped bending structure 43, which are respectively inserted and cooperated with the slot 122, U-shaped groove 123, and U-shaped limiting groove 124 on the curved die-casting part 1 to achieve the limiting and fixing of the central iron frame 4 in the x-axis, y-axis, or z-axis direction. Then, a fixing adhesive 5 and a wrapping adhesive 6 are provided between the central iron frame 4 and the curved die-casting part 1 to fix the central iron frame 4 in the z-axis direction and prevent loosening and warping.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0063] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0064] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0065] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A curved backlight module, characterized in that, include: A curved die-cast part includes a curved back plate and a sidewall arranged along the circumference of the curved back plate. A diffuser plate limiting groove is provided on the inner wall of the sidewall, and limiting silicone is provided within the diffuser plate limiting groove. An optical component includes a diffuser plate, the diffuser plate including a diffuser plate limiting insert disposed on one side of its edge, the diffuser plate limiting insert engaging with the limiting silicone.

2. The curved backlight module according to claim 1, characterized in that, The diffuser plate limiting blocks are multiple, and the multiple diffuser plate limiting blocks are arranged at intervals.

3. The curved backlight module according to claim 1, characterized in that, The diffuser plate is fixed to the curved die-cast part by adhesive on the side edge away from the diffuser plate limiting block.

4. The curved backlight module according to claim 1, characterized in that, The curved backlight module also includes a lamp plate, the curved back plate is provided with lamp plate limiting posts, the lamp plate is provided with lamp plate limiting holes adapted to the lamp plate limiting posts, and the lamp plate limiting holes are used for positioning the lamp plate on the curved die casting.

5. The curved backlight module according to claim 4, characterized in that, The light panel includes a pinhole reflective film and LED lights that provide illumination; The pinhole reflective film is attached to the lamp panel, and the LED beads are located in each of the pinholes of the pinhole reflective film and extend to the other side of the pinhole reflective film opposite to the lamp panel.

6. The curved backlight module according to claim 5, characterized in that, The edge of the lamp panel is fixed to the curved die-cast part with thermally conductive adhesive.

7. The curved backlight module according to claim 1, characterized in that, The inner side of each sidewall is provided with a reflective membrane.

8. The curved backlight module according to claim 1, characterized in that, The optical component further includes an optical diaphragm, which includes a diaphragm limiting block, a diaphragm limiting groove, and a diaphragm limiting hole. The inner wall of the sidewall is also provided with a U-shaped silicone groove and a diaphragm limiting post. The diaphragm limiting block is adapted to the U-shaped silicone groove, and a U-shaped silicone sleeve is provided between the diaphragm limiting block and the U-shaped silicone groove. The diaphragm limiting groove and the diaphragm limiting hole are both adapted to the diaphragm limiting post.

9. The curved backlight module according to claim 1, characterized in that, The curved backlight module also includes a central iron frame, and the curved die-cast part also includes a slot, a U-shaped groove and a U-shaped limiting groove. The U-shaped limiting groove is provided with a central iron frame limiting post. The central iron frame includes a protrusion, a central iron frame limiting insert and a Z-shaped bending structure. The protrusion is adapted to the slot for engaging the central iron frame with the curved die-cast part. The central iron frame limiting block is adapted to the U-shaped groove. The Z-shaped bending structure includes a limiting hole. The Z-shaped bending structure is embedded in the U-shaped limiting groove, causing the limiting hole to be nested on the central iron frame limiting post.

10. The curved backlight module according to claim 9, characterized in that, The central iron frame also includes an adhesive and a fixing adhesive. The adhesive is used to connect the central iron frame limiting block to the curved die-cast part, and the fixing adhesive is disposed between the side wall and the central iron frame.

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