Backlight mounting structure and backlight module

Abstract

The utility model provides a kind of backlight mounting structure, including first frame body, second frame body and diffuser plate, first frame body includes substrate and by the edge of substrate bending formation in height direction first side plate, both around form mounting space, and mounting space is equipped with light-emitting component;Second frame body includes main part and be equipped with limiting portion on main part, main part is in close contact with first side plate inner side, and limiting portion is equipped with limiting groove;Diffuser plate includes the first positioning slot being equipped with the card protrusion of diffuser plate edge and being equipped with the first positioning slot being recessed to diffuser plate both sides to card protrusion;Diffuser plate and second frame body abut, and together be equipped in mounting space;Card protrusion is inserted in limiting groove, and limiting portion is simultaneously inserted into first positioning slot;The end of first side plate is equipped with second positioning slot, and limiting portion is engaged with second positioning slot.The backlight mounting structure ensures that diffuser plate and light-emitting component position is accurate, with good light output effect, and firmly fixed.The utility model also provides the backlight module including the backlight mounting structure.

Description

Technical Field

[0001] This utility model belongs to the field of display module technology, specifically relating to a backlight mounting structure and a backlight module. Background Technology

[0002] As the application scenarios of display devices continue to expand, their shapes are no longer limited to standard square or circular structures. As one of the core components, the backlight module also changes with the shape of the display device.

[0003] However, traditional backlight modules utilize a mounting structure on one side, such as a stepped boss, to embed the diffuser plate and optical film used for optical processing within a mounting bracket of the backlight module, or to place them within the display back panel. When the display device is no longer irregularly shaped, the above structure, if used to fix the diffuser plate and optical film within an irregular mounting bracket, is obviously no longer stable. Slippage is likely to occur during movement, thus affecting the light emission effect.

[0004] To ensure the stability of the diffuser plate and optical film, the mounting structure needs to be adapted to the actual shape of the mounting bracket, meaning that the same mounting structure is only suitable for one type of irregular backlight module. This requires adjustments to the production process according to different styles. For small-batch, customized irregular backlight modules, this means constantly changing the production plan and assembly process, resulting in low production efficiency. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a backlight mounting structure and a backlight module. A limiting part is provided on the second frame, which is then used to mount the light-emitting component to both the diffuser plate and the mounting structure of the first frame. This ensures accurate positioning of the light-emitting component and the diffuser plate, guaranteeing optimal light output. Furthermore, the backlight mounting structure is simple, securely fixed, and uses a standardized assembly method, resulting in high production efficiency. It is suitable for small-batch, irregularly shaped backlight modules.

[0006] The technical effect to be achieved by this utility model is realized through the following technical solution:

[0007] In a first aspect, this utility model provides a backlight mounting structure, comprising:

[0008] The first frame includes a substrate and a first side plate. The first side plate is formed by bending the edge of the substrate in the height direction. The substrate and the first side plate surround to form an installation space. The installation space is provided with a light-emitting component.

[0009] The second frame includes a main body and a limiting part disposed on the main body. The main body is closely attached to the inner side of the first side plate, and the limiting part is provided with a limiting groove.

[0010] A diffuser plate includes a protrusion and a first positioning groove. The protrusion is disposed on the edge of the diffuser plate, and the first positioning groove is disposed on both sides of the protrusion and recessed into the diffuser plate.

[0011] The diffuser plate abuts against the second frame and is disposed together with the second frame within the installation space; the latching protrusion is inserted into the limiting groove, and the limiting part is simultaneously engaged in the first positioning groove; the end of the first side plate is provided with a second positioning groove, and the limiting part is engaged in the second positioning groove on the side abutting against the first side plate.

[0012] In some implementations, the limiting part includes a supporting protrusion, which is disposed adjacent to the limiting groove. When the locking protrusion is inserted into the limiting groove, the supporting protrusion is locked into the first positioning groove.

[0013] In some implementations, the support protrusion engages within the second positioning groove and does not protrude beyond the first side plate.

[0014] In some implementations, the main body includes a plugging protrusion disposed on the side of the main body facing the substrate. The substrate has a limiting hole that matches the plugging protrusion. When the limiting part is engaged with the second positioning groove, the plugging protrusion is inserted into and confined within the limiting hole.

[0015] In some implementations, a third frame is also included, which includes a second side panel and a folded edge. The second side panel is disposed around the outside of the first side panel, and the folded edge is formed by extending the edge of the second side panel toward the mounting space.

[0016] In some implementations, the folded edge has a blocking groove on the side facing the second frame, and the limiting part is inserted into the blocking groove in the height direction.

[0017] In some implementations, the folded edge is provided with a shaping insertion hole, which is provided along the connection between the folded edge and the second side plate. The end of the first side plate in the height direction extends outward away from the substrate to form a shaping boss, which is inserted into the shaping insertion hole.

[0018] In some implementations, the limiting groove is coplanar with the side of the main body away from the substrate; the backlight mounting structure also includes a fixing adhesive, which is disposed on the limiting groove and the main body in the height direction, and the diffuser is bonded and fixed to the second frame by the fixing adhesive.

[0019] Secondly, this utility model provides a backlight module disposed in an irregularly shaped display device, including a light-emitting component, a film component, and any of the backlight mounting structures described above;

[0020] The light-emitting component is disposed within the installation space. The light-emitting component includes a panel and a light-emitting element fixed on the panel. The panel is fixed on the substrate, and the light-emitting element faces the diffuser plate.

[0021] The diaphragm assembly is disposed on the side of the diffuser away from the substrate, and each diaphragm is provided with the same locking protrusion and the first positioning groove as the diffuser. The locking protrusion is inserted into the limiting groove, and the limiting part is simultaneously locked into the first positioning groove, thereby completing the positioning connection between the diaphragm assembly and the second frame.

[0022] In some implementations, the light-emitting component further includes a support column, which is disposed on the same side as the light-emitting element and abuts against the diffuser plate.

[0023] In summary, this utility model has at least the following advantages:

[0024] 1. The backlight mounting structure provided by this utility model first inserts the protruding part into the limiting groove, and the limiting part is simultaneously inserted into the first positioning groove to realize the positioning of the diffuser plate in the second frame. Then, the combination of the diffuser plate and the second frame is inserted into the second positioning groove through the limiting part, so that the diffuser plate can be accurately installed on the first frame, thereby ensuring the position of the light-emitting component and the diffuser plate and ensuring the final light output effect.

[0025] 2. The backlight mounting structure provided by this utility model can accurately position the diffuser plate and the first frame using only the limiting part. For irregularly shaped backlight modules, there is no need to use complex or precise limiting methods. Its structure is simple and the fixing is reliable.

[0026] 3. The backlight module provided by this utility model, after adopting the above-mentioned backlight mounting structure, can be installed in display devices of different shapes, provided that the installation is secure. Moreover, the assembly method of the backlight mounting structure is uniform, and the production efficiency is higher than that of existing solutions, making the backlight module more suitable for small-batch production. Attached Figure Description

[0027] Figure 1 This is an axonometric view of the backlight mounting structure of Example 1.

[0028] Figure 2 This is an exploded assembly view of the backlight mounting structure of Example 1.

[0029] Figure 3 This is an axial view of the second frame of Embodiment 1 facing the substrate.

[0030] Figure 4 This is an axonometric view of the backlight mounting structure in Example 2.

[0031] Figure 5 This is an exploded assembly view of the backlight mounting structure in Example 2.

[0032] Figure 6 for Figure 4 A schematic diagram of the structure at point B after being cut along section line AA.

[0033] Figure 7 This is an isometric view of the second frame with adhesive glue applied, as shown in Example 2.

[0034] Figure 8 This is an axial view of the backlight module in Example 3.

[0035] Figure 9 This is an exploded assembly view of the backlight module in Example 3.

[0036] Marked in the image:

[0037] 100. Backlight mounting structure;

[0038] 200. Backlight module;

[0039] 1. First frame; 11. Base plate; 111. Limiting insertion hole; 12. First side plate; 121. Second positioning groove; 122. Shaping boss; 13. Installation space.

[0040] 2. Second frame, 21. Main body, 211. Insertion protrusion, 22. Limiting part, 221. Limiting groove, 222. Supporting protrusion;

[0041] 3. Diffuser plate; 31. Snap protrusion; 32. First positioning groove;

[0042] 4. Third frame, 41. Second side panel, 42. Folded edge, 421. Blocking groove, 422. Shaping insertion hole;

[0043] 5. Fixing adhesive;

[0044] 6. Light-emitting components; 61. Panel; 62. Light-emitting elements; 63. Support columns;

[0045] 7. Diaphragm assembly;

[0046] Z, altitude direction. Detailed Implementation

[0047] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0048] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0049] 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.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0051] For ease of understanding, it should be noted that in the attached diagram, the Z-axis represents the height direction.

[0052] Example 1:

[0053] Please see Figures 1-2 This utility model provides a backlight mounting structure 100, which is mainly used in the backlight module of irregularly shaped display devices. The backlight mounting structure 100 includes a first frame 1, a second frame 2, and a diffuser plate 3.

[0054] Specifically, the first frame 1 includes a substrate 11 and a first side plate 12. The first side plate 12 is formed by bending the edge of the substrate 11 in the height direction Z. The substrate 11 and the first side plate 12 surround to form a mounting space 13. The mounting space 13 is provided with light-emitting components, emitting films, and other components. The second frame 2 includes a main body 21 and a limiting part 22 provided on the main body 21. The main body 21 is close to the inner side of the first side plate 12 and surrounds the mounting space 13 along the inner side of the first side plate 12. The limiting part 22 is provided with a limiting groove 221. The diffuser plate 3 includes a latching protrusion 31 and a first positioning groove 32. The latching protrusion 31 is provided on the edge of the diffuser plate 3, and the first positioning groove 32 is provided on both sides of the latching protrusion 31 and recessed into the diffuser plate 3.

[0055] More specifically, the diffuser plate 3 abuts against the second frame 2 and is disposed together with the second frame 2 within the mounting space 13. Between the diffuser plate 3 and the second frame 2, a latching protrusion 31 is inserted into a limiting groove 221, and a limiting part 22 simultaneously engages within a first positioning groove 32. This achieves accurate fixation of the diffuser plate 3 onto the second frame 2. A second positioning groove 121 is provided at the end of the first side plate 12, and the limiting part 22 engages within the second positioning groove 121 on the side abutting against the first side plate 12, thus completing the accurate fixation of the second frame 2 to the first frame 1.

[0056] With the cooperation of the locking protrusion 31 and the limiting part 22, and the limiting part 22 and the first positioning groove 32, the diffuser plate 3 is accurately and stably fixed on the second frame 2. Then, through the cooperation of the limiting part 22 and the second positioning groove 121, the second frame 2 and the first frame 1 are accurately fixed. Through the limiting part 22 of the second frame 2, the position of the diffuser plate 3 and the first frame 1 is effectively guaranteed, thereby ensuring that the position of the light-emitting component and the diffuser plate 3 set in the installation space 13 is accurate, and ensuring that the final light output effect is basically consistent with the design effect.

[0057] Compared with the existing fixing schemes for irregularly shaped backlight modules, the backlight mounting structure 100 provided in this embodiment only uses the limiting part 22 to accurately position the diffuser plate 3 and the first frame 1 respectively. The locking protrusion 31 and the first positioning groove 32 of the diffuser plate 3 form an "E"-shaped structure, which does not require a complex and precise fixing scheme, such as positioning along the edge of the frame of the irregularly shaped backlight module, to ensure accurate fixing of the diffuser plate 3. The structure is simpler and the fixing is more reliable.

[0058] In some embodiments, the limiting part 22 includes a supporting protrusion 222, which is disposed adjacent to the limiting groove 221. When the locking protrusion 31 is inserted into the limiting groove 221, the supporting protrusion 222 is engaged in the first positioning groove 32. In this embodiment, the limiting groove 221 is disposed between two supporting protrusions 222. When the locking protrusion 31 is inserted into the limiting groove 221, the two supporting protrusions 222 also simultaneously enter the two first positioning grooves 32. By interlocking with each other, the positional accuracy of the second frame 2 and the diffuser plate 3 is further improved.

[0059] Furthermore, the support protrusion 222 extends towards the first side plate 12 and engages within the second positioning groove 121. This eliminates the need for a separate structure for the limiting part 22 to engage with the second positioning groove 121, simplifying the overall configuration of the limiting part 22 and reducing the difficulty of its molding. Simultaneously, to further improve positioning accuracy and ensure that the limiting part 22 does not interfere with other structures outside the first side plate 12, the support protrusion 222 does not protrude beyond the first side plate 12 after engaging with the second positioning groove 121.

[0060] Considering that the actual deviation of the second positioning groove 121 of the first frame 1 may be large due to different manufacturing processes, in order to improve installation accuracy while further reducing production difficulty and defect rate, in this embodiment, the main body 21 includes a plugging protrusion 211, which is disposed on the side of the main body 21 facing the substrate 11. The substrate 11 is provided with a limiting insertion hole 111 that matches the plugging protrusion 211. When the limiting part 22 is engaged with the second positioning groove 121, the plugging protrusion 211 is inserted into and confined within the limiting insertion hole 111.

[0061] Please Figures 1-2 Based on this, refer to Figure 3 The fixing method using the insertion protrusion 211 and the limiting insertion hole 111 makes it easier to ensure accuracy during the manufacturing process. With the insertion protrusion 211 and the limiting insertion hole 111, when the second frame 2 and the first frame 1 are fixedly installed, the limiting part 22 engages with the second positioning groove 121, providing coarse positioning and guidance. This ensures installation accuracy while reducing the difficulty of production and installation, and improving production efficiency.

[0062] Of course, if only one limiting part 22 is provided, the positioning effect will obviously be limited. Therefore, in this embodiment, the second frame 2 has multiple limiting parts 22. If the backlight module 200 is relatively regular in shape, such as Figures 1-3As shown, if the backlight mounting structure 100 is closer to a rectangle in shape, two limiting parts 22 can be set in two mutually perpendicular directions on the plane of the backlight mounting structure 100 to achieve precise positioning of the diffuser plate 3 and the first frame 1. If the shape is closer to a circle or ellipse, one limiting part 22 can be set in each of two non-parallel directions, which can also achieve a good positioning effect. However, the specific distribution method needs to be determined according to the shape of the irregular backlight module 200, which will not be elaborated here.

[0063] In summary, the backlight mounting structure provided in this embodiment first inserts the protruding part into the limiting groove, and the limiting part simultaneously engages into the first positioning groove to position the diffuser plate in the second frame. Then, the combination of the diffuser plate and the second frame is engaged together in the second positioning groove through the limiting part, so that the diffuser plate can be accurately installed on the first frame, thereby ensuring the position of the light-emitting component and the diffuser plate and ensuring the final light output effect.

[0064] Secondly, the backlight mounting structure can accurately position the diffuser plate and the first frame using only the limiting part. For irregularly shaped backlight modules, there is no need to use a complex and precise limiting method. Its structure is simple and the fixation is reliable.

[0065] Example 2:

[0066] Please Figures 1-3 Based on this, refer to Figures 4-6 This embodiment further optimizes upon embodiment 1, providing a backlight mounting structure 100. The difference lies in that the backlight mounting structure 100 also includes a third frame 4, which includes a second side plate 41 and a folded edge 42. The second side plate 41 is arranged around the outside of the first side plate 12, and the folded edge 42 extends from the edge of the second side plate 41 toward the mounting space 13.

[0067] Above the diffuser 3 in the height direction Z, the backlight module is equipped with a diaphragm assembly 7 for optimizing light output. The third frame 4 is installed and fixed to the first frame 1, and the diaphragm assembly 7 is pressed against the diffuser 3 by the folded edge 42, thereby completing the fixation of the diaphragm assembly 7. At the same time, the diffuser 3 is clamped in the height direction Z to fix the position of the diffuser 3 in the height direction Z.

[0068] In a further embodiment, the folded edge 42 has a blocking groove 421 on the side facing the second frame 2, and the limiting part 22 is inserted into the blocking groove 421 in the height direction Z. When the backlight module is subjected to a sudden external force, such as a drop or impact, the third frame 4 can provide external protection against the detachment of the second frame 2 because the limiting part 22 is inserted into the blocking groove 421. Without affecting the installation of the diaphragm assembly 7 and the diffuser plate 3, even if the second frame 2 has a tendency to detach, the positional deviation of the diaphragm assembly 7 and the diffuser plate 3 can be minimized. At the same time, after setting the blocking groove 421, the thickness of the backlight module can be further reduced, and the height of the limiting part 22 does not affect the contact between the folded edge 42 and the diaphragm assembly 7.

[0069] In other embodiments, the folded edge 42 is provided with a shaping insertion hole 422, which is provided along the connection between the folded edge 42 and the second side plate 41. The end of the first side plate 12 in the height direction Z extends outward away from the substrate 11 to form a shaping boss 122, which is inserted into the shaping insertion hole 422. The folded edge 42 extends from the second side plate 41 into the mounting space 13 in a small dimension, so the third frame 4 is generally annular and its structural strength is relatively weak. By inserting the shaping boss 122 into the shaping insertion hole 422, the first frame 1 provides support and shaping for the shape of the third frame 4, preventing the third frame 4 from deforming due to external conditions during use. The shaping insertion hole 422 is provided at the connection between the folded edge 42 and the second side plate 41, which effectively reduces the size of the backlight mounting structure 100 and makes the whole structure compact and fits snugly.

[0070] like Figure 7 As shown, in this embodiment, the limiting groove 221 and the side of the main body 21 away from the substrate 11 are coplanar. When the locking protrusion 31 is inserted into the limiting groove 221, the edge of the second frame 2 can completely fit with the edge of the diffuser plate 3, providing a larger support surface for the diffuser plate 3 and reducing the deformation of the diffuser plate 3. The backlight mounting structure 100 also includes a fixing adhesive 5, which is disposed on the limiting groove 221 and the main body 21 in the height direction Z. The diffuser plate 3 is bonded and fixed to the second frame 2 by the fixing adhesive 5. The locking protrusion 31, the first positioning groove 32 and the limiting part 22 cooperate to fix the position of the diffuser plate 3 and the second frame 2 on the plane, while the fixing adhesive 5 sticks the diffuser plate 3 into the second frame 2 in the height direction Z, restricting the movement of the diffuser plate 3 and making the diffuser plate 3 completely fixed during installation.

[0071] Continue reading Figures 4-7In some embodiments, the first frame 1 is a bent metal part, and the shape of the substrate 11 and the first side plate 12 is achieved by cutting, shaping and bending the metal plate. The second frame 2 and the third frame 4 are injection molded or die-cast parts. In this embodiment, the second frame 2 and the third frame 4 are both injection molded parts. Injection molding can reduce the overall weight of the backlight mounting structure 100. At the same time, after being installed with the first frame 1, the shape of the second frame 2 and the third frame 4 can also be guaranteed, with less deformation.

[0072] Example 3:

[0073] Please Figures 1-7 Based on the above Figures 8-9 This embodiment provides a backlight module 200, which is disposed in an irregularly shaped display device. The backlight module 200 includes a light-emitting component 6, a diaphragm component 7, and the backlight mounting structure 100 described in Embodiment 1 or Embodiment 2.

[0074] Specifically, the light-emitting component 6 is disposed in the installation space 13. The light-emitting component 6 includes a panel 61 and a light-emitting element 62 fixed on the panel 61. The panel 61 is fixed on the substrate 11, and the light-emitting element 62 faces the diffuser plate 3.

[0075] The diaphragm assembly 7 is disposed on the side of the diffuser plate 3 away from the substrate 11, and each diaphragm is provided with the same snap-fit ​​protrusion 31 and first positioning groove 32 as the diffuser plate 3. The snap-fit ​​protrusion 31 is inserted into the limiting groove 221, and the limiting part 22 is simultaneously snapped into the first positioning groove 32, thereby completing the positioning connection between the diaphragm assembly 7 and the second frame 2.

[0076] In this embodiment, the light-emitting element 62 is a Mini LED bead, which achieves regional brightness control through independent control, ensuring precise and delicate brightness control of the local display. In some embodiments, optical quality issues such as dark areas and shadows may occur, which can be resolved by using a current compensation design for the light-emitting element 62. In other embodiments, the light-emitting element 62 can also be other light-emitting devices, such as ring-shaped light-emitting elements or strip-shaped light-emitting elements.

[0077] The diaphragm assembly 7 and the diffuser plate 3 are provided with the same latching protrusion 31 and first positioning groove 32, which facilitates their installation together with the diffuser plate 3 within the second frame 2. This eliminates the need for complex positioning structures on the second frame 2 or the first frame 1, reducing production costs and improving assembly efficiency. If a third frame 4 is provided, the folded edge 42 of the third frame 4 can fix the diaphragm assembly 7 in the height direction Z, pressing the diaphragm assembly 7 firmly onto the diffuser plate 3. This ensures that the positions of the diffuser plate 3 and the diaphragm assembly 7 do not shift during use within the backlight module 200.

[0078] Furthermore, for display screens with large display areas, if the diffuser plate 3 is only supported by its edge abutting against the second frame 2, the diffuser plate 3 near the center may collapse and bend downwards due to gravity, causing deformation and distortion of the actual optical processing effect of the diffuser plate 3, affecting the final light entering the diaphragm assembly 7. Therefore, in this embodiment, the light-emitting assembly 6 also includes a support column 63, which is disposed on the same side as the light-emitting element 62 and abuts against the diffuser plate 3. By using multiple support columns 63 to support the diffuser plate 3 in the installation space 13, the collapse of the diffuser plate 3 is reduced, thereby reducing the light emission deviation of the diffuser plate 3.

[0079] In summary, the backlight module provided in this embodiment, with its precise positioning of the diffuser plate and the first frame, can be installed in display devices of different shapes while ensuring a secure installation. Furthermore, the standardized assembly method of the backlight mounting structure results in high production efficiency, making the backlight module more suitable for small-batch production.

[0080] The above description is merely an example and illustration of the structure of this utility model, and while the description is quite specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. A backlight mounting structure, characterized in that, include: The first frame (1) includes a substrate (11) and a first side plate (12). The first side plate (12) is formed by bending the edge of the substrate (11) in the height direction (Z). The substrate (11) and the first side plate (12) surround to form an installation space (13). The installation space (13) is provided with a light-emitting component (6). The second frame (2) includes a main body (21) and a limiting part (22) provided on the main body (21). The main body (21) is closely attached to the inner side of the first side plate (12), and the limiting part (22) is provided with a limiting groove (221). A diffuser plate (3) includes a protrusion (31) and a first positioning groove (32). The protrusion (31) is disposed on the edge of the diffuser plate (3), and the first positioning groove (32) is disposed on both sides of the protrusion (31) and recessed into the diffuser plate (3). The diffuser plate (3) abuts against the second frame (2) and is disposed together with the second frame (2) in the installation space (13); the latch (31) is inserted into the limiting groove (221), and the limiting part (22) is simultaneously inserted into the first positioning groove (32); the end of the first side plate (12) is provided with a second positioning groove (121), and the limiting part (22) is inserted into the second positioning groove (121) on the side abutting against the first side plate (12).

2. The backlight mounting structure according to claim 1, characterized in that, The limiting part (22) includes a supporting protrusion (222), which is disposed adjacent to the limiting groove (221). When the locking protrusion (31) is inserted into the limiting groove (221), the supporting protrusion (222) is locked into the first positioning groove (32).

3. The backlight mounting structure according to claim 2, characterized in that, The support protrusion (222) is engaged in the second positioning groove (121) and does not protrude from the first side plate (12).

4. The backlight mounting structure according to claim 3, characterized in that, The main body (21) includes a plug-in protrusion (211), which is disposed on the side of the main body (21) facing the substrate (11). The substrate (11) is provided with a limiting insertion hole (111) that matches the plug-in protrusion (211). When the limiting part (22) is engaged with the second positioning groove (121), the plug-in protrusion (211) is inserted into and confined within the limiting insertion hole (111).

5. The backlight mounting structure according to claim 1, characterized in that, It also includes a third frame (4), which includes a second side plate (41) and a folded edge (42). The second side plate (41) is arranged around the outside of the first side plate (12), and the folded edge (42) is formed by extending from the edge of the second side plate (41) toward the mounting space (13).

6. The backlight mounting structure according to claim 5, characterized in that, The folded edge (42) has a blocking groove (421) on the side facing the second frame (2), and the limiting part (22) is inserted into the blocking groove (421) in the height direction (Z).

7. The backlight mounting structure according to claim 5, characterized in that, The folded edge (42) is provided with a shaping insertion hole (422). The shaping insertion hole (422) is provided along the connection between the folded edge (42) and the second side plate (41). The end of the first side plate (12) in the height direction (Z) extends outward away from the substrate (11) to form a shaping boss (122). The shaping boss (122) is inserted into the shaping insertion hole (422).

8. The backlight mounting structure according to claim 1, characterized in that, The limiting groove (221) and the main body (21) are coplanar on the side away from the substrate (11); the backlight mounting structure (100) also includes a fixing adhesive (5), which is disposed on the limiting groove (221) and the main body (21) in the height direction (Z), and the diffuser plate (3) is bonded and fixed to the second frame (2) by the fixing adhesive (5).

9. A backlight module, disposed within an irregularly shaped display device, characterized in that, It includes a light-emitting component (6), a diaphragm component (7), and a backlight mounting structure (100) as described in any one of claims 1-8; The light-emitting component (6) is disposed in the installation space (13). The light-emitting component (6) includes a panel (61) and a light-emitting element (62) fixed on the panel (61). The panel (61) is fixed on the substrate (11). The light-emitting element (62) faces the diffuser plate (3). The diaphragm assembly (7) is disposed on the side of the diffuser plate (3) away from the substrate (11), and each diaphragm is provided with the same locking protrusion (31) and the first positioning groove (32) as the diffuser plate (3). The locking protrusion (31) is inserted into the limiting groove (221), and the limiting part (22) is simultaneously locked into the first positioning groove (32), thereby completing the positioning connection between the diaphragm assembly (7) and the second frame (2).

10. The backlight module according to claim 9, characterized in that, The light-emitting component (6) also includes a support column (63), which is disposed on the same side as the light-emitting element (62) and abuts against the diffuser plate (3).

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