CN218917873U - Backlight module with limiting structure - Google Patents

Abstract

The application relates to the technical field of liquid crystal display, and particularly discloses a backlight module with a limiting structure, wherein the backlight module with the limiting structure comprises a die casting, a lamp panel, an optical material and a middle iron frame, wherein the lamp panel, the optical material and the middle iron frame are arranged in the die casting; the lamp panel is provided with a lamp panel limiting hole, and the lamp panel limiting hole is sleeved on the limiting column, so that the lamp panel is limited and fixed in the X and Y directions; the optical material comprises a plurality of optical films and a diffusion plate, wherein the optical films are provided with first limit bumps, the diffusion plate is provided with second limit bumps, the first limit bumps and the second limit bumps are matched with the limit grooves, and the diffusion plate and the optical films are limited to move in the X and Y directions, so that the display effect of the backlight module is guaranteed. The display effect of the backlight module is guaranteed.

Description

Backlight module with limiting structure

Technical Field

The application relates to the technical field of liquid crystal display, in particular to a backlight module with a limiting structure.

Background

The backlight module is used as an important component of the liquid crystal display, provides enough brightness and uniformly distributed light sources for the liquid crystal display through the backlight module, and can be divided into a photometric type and a direct type according to the positions of the light sources.

The back plate and the iron frame of the existing backlight module are connected in a welding mode, so that the replacement of internal materials is inconvenient, and in the use process of the backlight module, a large amount of heat is generated by the light source, so that the light guide plate is heated and expanded, a certain space is reserved when the backlight module is assembled, but in the process of the heated and expanded, the positions of the light guide plate and the backlight materials are changed, and the display effect of the backlight module is influenced;

therefore, when the backlight module is used, the problem that the effect of the backlight module is affected due to the position deviation of the backlight material exists.

Disclosure of Invention

In order to ensure the display effect of the backlight module, the application provides the backlight module with the limiting structure.

The application provides a backlight unit with limit structure adopts following technical scheme:

a backlight module with a limiting structure, comprising:

the die casting comprises a back plate and side plates, wherein the side plates are fixedly arranged along the circumferential direction of the back plate, limiting grooves are formed in the inner side walls of the side plates in an inward concave manner, and limiting columns are formed in the back plate in an inward protruding manner;

the lamp panel is assembled in the die casting, a lamp panel limiting hole is formed in the lamp panel, and the lamp panel limiting hole is matched with the limiting column;

the optical material is assembled in the die casting and comprises a plurality of optical films and a diffusion plate, wherein first limit lugs are arranged on the optical films, second limit lugs are arranged on the diffusion plate, and the first limit lugs and the second limit lugs are matched with the limit grooves;

and the middle iron frame is detachably arranged on the die casting.

Based on the technical scheme, the middle iron frame is detachably connected with the die casting, so that the lamp panel and the optical materials can be replaced conveniently; the lamp panel limiting holes are matched with limiting columns on the die castings, and the lamp panel limiting holes are sleeved on the limiting columns, so that the lamp panels are limited and fixed in the X and Y directions, and the position of the lamp panels is prevented from shifting; the first limit protruding block and the second limit protruding block are matched with the limit groove, so that the diffusion plate and the optical membrane are limited to move in the X and Y directions, the displacement condition of the lamp panel and the optical material is improved, and the display effect of the backlight module is guaranteed.

Preferably, the light plate is provided with an LED lamp, the LED lamp is used for providing brightness, a heat-conducting glue is arranged between the light plate and the die casting, and the heat-conducting glue is used for adhering and fixing the light plate on the back plate.

Based on the technical scheme, the lamp panel is fixed on the backboard of the die casting through the heat conducting glue, so that the Z direction of the lamp panel is limited and fixed.

Preferably, the height of the limiting post is not smaller than the sum of the thicknesses of the lamp panel and the heat conducting glue, and the height of the limiting post is not larger than the sum of the heights of the lamp panel, the heat conducting glue and the LED lamp.

Based on the technical scheme, the height of the limiting column is not less than the sum of the thicknesses of the lamp panel and the heat-conducting glue, so that the limiting column can be used for limiting and fixing the lamp panel in the X and Y directions, and the height of the limiting column is not greater than the sum of the heights of the lamp panel, the heat-conducting glue and the LED lamp, so that the follow-up diffusion plate and the optical film can be flatly installed in the die casting.

Preferably, a first installation step is concavely formed on one side of the side plate, facing the geometric center of the back plate, and is located below the limiting groove, diffusion plate fixing glue is arranged on the first installation step, and the diffusion plate is installed on the first installation step and fixedly connected with the die casting through the diffusion plate fixing glue.

Based on the technical scheme, the diffusion plate is fixed on the first mounting step by the diffusion plate fixing adhesive, so that the movement of the diffusion plate in the Z direction is limited.

Preferably, the diffusion plate is provided with diffusion plate silica gel, and the thickness of the diffusion plate silica gel is not smaller than the sum of the thicknesses of the optical films, so that the middle iron frame presses the diffusion plate on the die casting through the diffusion plate silica gel.

Based on the technical scheme, the thickness of the diffusion plate silica gel is not smaller than the sum of the thicknesses of the optical films, one end of the diffusion plate silica gel can be abutted against the middle iron frame, and the other end of the diffusion plate silica gel is abutted against the diffusion plate, so that the movement of the diffusion plate in the Z direction is further limited.

Preferably, a second mounting step is formed by extending one side of the side plate towards the geometric center of the back plate, the second mounting step is arranged above the first mounting step, the height of the second mounting step is the same as the thickness of the diffusion plate, and a film fixing adhesive is arranged on the second mounting step and used for fixing the optical film on the die casting.

Based on the technical scheme, the movement of the optical film in the Z direction is limited by the film fixing adhesive.

Preferably, the optical diaphragms are identical in shape, limiting clamping lugs are arranged on the optical diaphragms, diaphragm limiting columns are further arranged on the second mounting steps, and the limiting clamping lugs are matched with the diaphragm limiting columns;

or/and the optical film is provided with film pressing foam, and the film pressing foam is arranged between the middle iron frame and the optical film.

Based on the technical scheme, the limiting clamping lugs of the optical diaphragm are clamped with the diaphragm limiting columns, and the film pressing foam is abutted between the middle iron frame and the optical diaphragm, so that the X, Y and Z directions of the optical diaphragm are limited and fixed.

Preferably, the middle iron frame comprises a bottom plate, the edge position of the bottom plate upwards extends to form a buckling plate, a T-shaped buckle is arranged on the buckling plate, a T-shaped buckle groove is formed in the upper surface of the side plate, T-shaped fixing glue is arranged on the T-shaped buckle groove, and the T-shaped buckle is fixed in the T-shaped buckle groove through the T-shaped fixing glue.

Based on the technical scheme, the T-shaped buckle is fixed in the T-shaped buckle groove through the T-shaped fixing glue, so that the movement of the middle iron frame in the X, Y and Z directions is limited.

Preferably, a third mounting step is formed on the inner side wall of the side plate towards the geometric center of the back plate in an extending mode, the third mounting step is located on the first mounting step, and the height of the third mounting step is the same as the depth of the limiting groove.

Based on the technical scheme, the height of the third mounting step is the same as the depth of the limit groove, so that enough space is reserved for placing the diffusion plate and the optical film.

Preferably, the inner side wall of the side plate is provided with a built-in clamping groove, the outer side wall of the buckling plate is convexly provided with a first convex hull, and the first convex hull is matched with the built-in clamping groove;

or/and, be provided with the portion of bending on the bottom plate, be provided with the buckle on the portion of bending, be provided with the second convex closure on the curb plate, the second convex closure with buckle looks adaptation.

Based on the technical scheme, the first convex hull is matched with the built-in clamping groove, the second convex hull is matched with the buckle, so that the connection between the middle iron frame and the die casting is firmer, the movement of the middle iron frame in X, Y and Z directions is limited, the stress of the middle iron frame is more uniform, the phenomenon of outward scraping of the middle iron frame is better prevented, and therefore the limiting fixation stability of the structures such as the lamp panel, the diffusion plate and the optical film is ensured, and the normal display effect of the backlight module is ensured.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the light plate limiting hole is sleeved on the limiting column and used for limiting and fixing the light plate in the X and Y directions, the first limiting protruding block and the second limiting protruding block are matched with the limiting groove and used for limiting the movement of the diffusion plate and the optical membrane in the X and Y directions so as to improve the displacement condition of the light plate and the optical material and further ensure the display effect of the backlight module;

2. the height of the limiting column is not smaller than the sum of the thicknesses of the lamp panel and the heat-conducting glue, the height of the limiting column is not larger than the sum of the heights of the lamp panel, the heat-conducting glue and the LED lamp, and the diffusion plate and the optical material are convenient to install while the lamp panel is limited and fixed;

3. the thickness of the diffusion plate silica gel is not less than the sum of the thicknesses of the plurality of optical films so as to limit the movement of the diffusion plate in the Z direction.

Drawings

Fig. 1 is an exploded view of a backlight module with a limiting structure according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a portion of a backlight module with a limiting structure according to an embodiment of the present disclosure, which is mainly used for connecting a lamp panel and a die casting;

FIG. 3 is a schematic diagram of the combined structure of FIG. 2;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view showing an exploded structure of die castings and diffusion plates according to an embodiment of the present application;

FIG. 6 is a schematic view showing the structure of a die casting according to an embodiment of the present application;

FIG. 7 is an enlarged view of portion B of FIG. 6;

FIG. 8 is an enlarged view of portion C of FIG. 6;

FIG. 9 is a schematic diagram showing the structure of FIG. 6 from different viewing angles;

FIG. 10 is an enlarged view of portion D of FIG. 9;

fig. 11 is a schematic diagram illustrating a partial explosion structure of a backlight module with a limiting structure according to an embodiment of the disclosure;

FIG. 12 is an enlarged view of portion E of FIG. 11;

FIG. 13 is an enlarged view of portion F of FIG. 11;

fig. 14 is a schematic diagram of a partially exploded structure of a backlight module with a limiting structure according to an embodiment of the present disclosure, and mainly shows a structure of an optical film;

fig. 15 is an enlarged view of a portion G of fig. 14;

FIG. 16 is a schematic view showing the structure of a die casting and a middle iron frame according to an embodiment of the present application;

FIG. 17 is an enlarged view of portion H of FIG. 16;

fig. 18 shows an enlarged view of the portion I in fig. 16.

Reference numerals illustrate: 10. a die casting; 11. a back plate; 111. a limit column; 12. a side plate; 121. a limit groove; 122. t-shaped buckling groove; 123. a clamping groove is arranged in the inner part; 13. a first side plate; 131. a first limit groove; 14. a second side plate; 141. the second limit groove; 142. a second convex hull; 15. a first mounting step; 16. a second mounting step; 161. a membrane limit column; 17. a third mounting step; 18. t-shaped fixing glue; 20. a middle iron frame; 21. a bottom plate; 22. a buckling plate; 221. t-shaped buckle; 222. a first convex hull; 23. a bending part; 231. a buckle; 30. a lamp panel; 31. a lamp panel limiting hole; 32. an LED lamp; 40. a heat-conducting adhesive; 50. an optical material; 51. a diffusion plate; 511. the second limit bump; 512. diffusion plate fixing glue; 513. diffusion plate silica gel; 52. an optical film; 521. a light-splitting film; 522. a diffusion film; 523. a lower brightness enhancement film; 524. a medium brightness enhancement film; 525. a privacy film; 526. a first limit bump; 527. film fixing glue; 528. pressing film foam; 529. limiting clamping lugs; 60. a reflection cover; 70. a reflective cover fixing adhesive; 80. and a bag Bian Jiao.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-18.

The embodiment of the application discloses a backlight module with a limiting structure.

Referring to fig. 1, a backlight module with a limiting structure includes a die casting 10 and a detachable middle iron frame 20 disposed on the die casting 10, a receiving space is formed between the die casting 10 and the middle iron frame 20, a lamp panel 30 and an optical material 50 are sequentially disposed in the receiving space from bottom to top, the lamp panel 30 provides light rays, the light rays uniformly emit out after passing through the optical material 50, and the lamp panel 30 and the optical material 50 are clamped with the die casting 10, so that the display effect of the backlight module is ensured.

Referring to fig. 2, the die casting 10 includes a back plate 11 and a side plate 12, the side plate 12 is fixedly disposed at the peripheral edge position of the back plate 11, and the upper, middle and lower parts of the back plate 11 are provided with limiting posts 111, and the lamp panel 30 is provided with lamp panel limiting holes 31 corresponding to the limiting posts 111 one by one, and the lamp panel limiting holes 31 are sleeved on the limiting posts 111, so that the lamp panel 30 is limited and fixed in the X and Y directions through the limiting posts 111.

Referring to fig. 2 and 3, a plurality of LED lamps 32 are arranged on a lamp panel 30 in an array manner, the LED lamps 32 are used for providing light, a heat-conducting adhesive 40 is arranged between the lamp panel 30 and a back plate 11, and the lamp panel 30 is fixed on the back plate 11 through the heat-conducting adhesive 40, so that limit fixation of the lamp panel 30 in the Z direction is realized.

Referring to fig. 4, the height of the limiting post 111 is not less than the sum of the thicknesses of the lamp panel 30 and the heat conductive paste 40 to achieve the limiting fixation of the lamp panel 30 in the X and Y directions, and the height of the limiting post 111 is not greater than the sum of the thicknesses of the lamp panel 30, the heat conductive paste 40 and the LED lamp 32 to facilitate the installation of the optical material 50 on the lamp panel 30.

Referring to fig. 1 and 5, the optical material 50 includes a diffusion plate 51 and a plurality of optical films 52 having identical shapes, the diffusion plate 51 is disposed above the lamp panel 30, the optical films 52 are disposed above the diffusion plate 51, a plurality of second limiting protrusions 511 are disposed on three sides of the diffusion plate 51, and limiting grooves 121 are formed on the side plates 12, and the limiting grooves 121 are adapted to the second limiting protrusions 511, so as to limit movement of the diffusion plate 51 in X and Y directions.

Referring to fig. 6, 7 and 8, the side plate 12 includes two first side plates 13 and two second side plates 14, the first side plates 13 and the second side plates 14 are vertically disposed, the limiting groove 121 includes a first limiting groove 131 and a second limiting groove 141, the first limiting groove 131 is formed by inward recessing of inner sidewalls of the two first side plates 13, the second limiting groove 141 is formed by inward recessing of inner sidewalls of one of the second side plates 14, and the first limiting groove 131 and the second limiting groove 141 are uniformly adapted to the second limiting protrusions 511, thereby limiting movement of the diffusion plate 51 in the X and Y directions.

Referring to fig. 8, 9 and 10, the side plate 12 is concavely formed toward the inside with a first mounting step 15, the first mounting step 15 is located under the first and second limiting grooves 131 and 141, the diffusion plate 51 is mounted on the first mounting step 15, a diffusion plate fixing glue 512 is provided on the first mounting step 15, the diffusion plate fixing glue 512 is provided on the opposite side of the second limiting groove 141, and the diffusion plate 51 is fixed on the first mounting step 15 by the diffusion plate fixing glue 512, thereby restricting movement of the diffusion plate 51 in the Z direction.

Referring to fig. 10, 11 and 12, a diffusion plate silica gel 513 is disposed on the diffusion plate 51, the diffusion plate silica gel 513 is disposed on the same side as the diffusion plate fixing gel 512, and the thickness of the diffusion plate silica gel 513 is not less than the sum of the thicknesses of the plurality of optical films 52, so that one end of the diffusion plate silica gel 513 is abutted against the diffusion plate 51, and the other end of the diffusion plate silica gel 513 is abutted against the middle iron frame 20, thereby restricting movement of the diffusion plate 51 in the Z direction.

Referring to fig. 7, 10 and 14, first limit protrusions 526 are provided at both ends of the optical film 52, the first limit protrusions 526 are disposed opposite to the first limit grooves 131, and movement of the optical film 52 in X and Y directions is limited by the first limit grooves 131; a second mounting step 16 is provided above the first mounting step 15, the second mounting step 16 has the same height as the thickness of the diffusion plate 51, and a film fixing adhesive 527 is provided on the second mounting step 16 so that the optical film 52 adjacent to the diffusion plate 51 is provided on the film fixing adhesive 527, thereby restricting the movement of the optical film 52 in the Z direction.

Referring to fig. 14 and 15, the optical film sheet 52 is provided with a foam film 528, the foam film 528 is provided on the optical film sheet 52 adjacent to the middle iron frame 20, and the foam film 528 is provided between the middle iron frame 20 and the optical film sheet 52, so that the Z-direction of the optical film sheet 52 is limited and fixed.

Referring to fig. 10 and 15, the optical film 52 is provided with a limiting clip 529, and the second mounting step 16 is provided with a film limiting post 161, and the film limiting post 161 is disposed corresponding to the limiting clip 529, so as to limit the movement of the optical film 52 in the X and Y directions.

Referring to fig. 8 and 13, the middle iron frame 20 includes a bottom plate 21 and a fastening plate 22 disposed at the peripheral edge of the bottom plate 21, T-shaped fastening grooves 122 are formed in the fastening plate 22, T-shaped fastening grooves 122 are formed in the upper surface of the side plate 12, the T-shaped fastening grooves 122 are formed in the two first side plates 13 and the second side plate 14 far from the second mounting step 16, T-shaped fixing glue 18 is disposed in the T-shaped fastening grooves 122, and the T-shaped fastening 221 is fixed in the T-shaped fastening grooves 122 through the T-shaped fixing glue 18, so that movement of the middle iron frame 20 in X, Y and Z directions is limited.

Referring to fig. 10, the inner side wall of the side plate 12 is formed with a third mounting step 17 extending toward the back plate 11, the third mounting step 17 is located above the first mounting step 15, and the height of the third mounting step 17 is equal to the depth of the first limiting groove 131; the side plate 12 is provided with a built-in clamping groove 123, the built-in clamping groove 123 is located above the third mounting step 17, the outer side wall of the buckling plate 22 protrudes outwards to form a first convex hull 222, and the first convex hull 222 is clamped with the built-in clamping groove 123, so that the movement of the middle iron frame 20 is limited.

Referring to fig. 16, 17 and 18, a bending portion 23 is provided on the bottom plate 21, a buckle 231 is provided on the bending portion 23, a second convex hull 142 is provided on the second side plate 14, the second convex hull 142 is located at one side close to the second mounting step 16, and the buckle 231 is clamped with the second mounting step 16, so that connection between the die casting 10 and the middle iron frame 20 is fastened.

Referring to fig. 18, the outer portion of the bending portion 23 is provided with a binding glue 80, a portion of the binding glue 80 is attached to the bending portion 23, and another portion of the binding glue 80 is attached to the die casting 10, thereby reinforcing the connection between the die casting 10 and the middle iron frame 20.

Referring to fig. 1, the optical films 52 are a light splitting film 521, a diffusion film 522, a lower intensifying film 523, a middle intensifying film 524, and a peep preventing film 525, respectively, and the light splitting film 521, the diffusion film 522, the lower intensifying film 523, the middle intensifying film 524, and the peep preventing film 525 are sequentially disposed from bottom to top, so that the display effect of the backlight module is better.

Referring to fig. 1, a reflective cover 60 and a reflective cover fixing glue 70 are disposed between a lamp panel 30 and a diffusion plate 51, the reflective cover 60 is matched with the lamp panel 30, and the reflective cover 60 is fixed with the lamp panel 30 through the reflective cover fixing glue 70, so that the reflective cover 60 moves in the Z direction now, and the problem of poor display effect caused by displacement of the reflective cover 60 is avoided.

The implementation principle of the backlight module with the limiting structure in the embodiment of the application is as follows: the lamp panel limiting holes 31 on the lamp panel 30 are sleeved on the limiting columns 111, and the lamp panel 30 is fixed on the die casting 10 through the heat conducting glue 40, so that the movement of the lamp panel 30 in the X, Y and Z directions is limited; the second limit bump 511 on the diffusion plate 51 is adapted to the first limit groove 131 and the second limit groove 141, so as to limit and fix the diffusion plate 51 in the X and Y directions, the diffusion plate 51 is fixed on the first mounting step 15 by the diffusion plate fixing glue 512, and the middle iron frame 20 is used for limiting the movement of the diffusion plate 51 in the Z direction by pressing the diffusion plate silica gel 513; the first limiting bump 526 of the optical film 52 is matched with the first limiting groove 131, and the limiting clamping lug 529 is matched with the film limiting column 161, so that movement of the optical film 52 in the X and Y directions is limited, movement of the optical film 52 in the Z direction is limited through the film fixing glue 527 and the film pressing foam 528, and the display effect of the backlight module is ensured by limiting the positions of the lamp panel 30, the diffusion plate 51 and the optical film 52 on the die casting 10.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. A backlight module with a limiting structure is characterized by comprising:

the die casting (10) comprises a back plate (11) and side plates (12), wherein the side plates (12) are fixedly arranged along the circumferential direction of the back plate (11), limiting grooves (121) are formed in the inner side wall boxes of the side plates (12) in a recessed mode, and limiting columns (111) are formed in the back plate (11) in an inward protruding mode;

the lamp panel (30) is assembled in the die casting (10), a lamp panel limiting hole (31) is formed in the lamp panel (30), and the lamp panel limiting hole (31) is matched with the limiting column (111);

the optical material (50) is assembled in the die casting (10), the optical material (50) comprises a plurality of optical films (52) and a diffusion plate (51), a first limit lug (526) is arranged on the optical films (52), a second limit lug (511) is arranged on the diffusion plate (51), and the first limit lug (526) and the second limit lug (511) are matched with the limit groove (121);

the middle iron frame (20) is detachably arranged on the die casting (10).

2. The backlight module with the limiting structure according to claim 1, wherein an LED lamp (32) is arranged on the lamp panel (30), the LED lamp (32) is used for providing brightness, a heat-conducting glue (40) is arranged between the lamp panel (30) and the die casting (10), and the heat-conducting glue (40) is used for adhering and fixing the lamp panel (30) on the back plate (11).

3. The backlight module with the limiting structure according to claim 2, wherein the height of the limiting post (111) is not less than the sum of the thicknesses of the lamp panel (30) and the heat conducting glue (40), and the height of the limiting post (111) is not greater than the sum of the heights of the lamp panel (30), the heat conducting glue (40) and the LED lamp (32).

4. The backlight module with the limiting structure according to claim 1, wherein a first mounting step (15) is concavely formed on one side of the side plate (12) facing the geometric center of the back plate (11), the first mounting step (15) is located below the limiting groove (121), a diffusion plate fixing adhesive (512) is arranged on the first mounting step (15), and the diffusion plate (51) is mounted on the first mounting step (15) and is fixedly connected with the die casting (10) through the diffusion plate fixing adhesive (512).

5. The backlight module with the limiting structure according to claim 1, wherein a diffusion plate silica gel (513) is disposed on the diffusion plate (51), and the thickness of the diffusion plate silica gel (513) is not smaller than the sum of the thicknesses of the plurality of optical films (52), so that the middle iron frame (20) presses the diffusion plate (51) on the die casting (10) through the diffusion plate silica gel (513).

6. The backlight module with the limiting structure according to claim 4, wherein a second mounting step (16) is formed by extending one side of the side plate (12) towards the geometric center of the back plate (11), the second mounting step (16) is arranged above the first mounting step (15), the height of the second mounting step (16) is the same as the thickness of the diffusion plate (51), a film fixing adhesive (527) is arranged on the second mounting step (16), and the film fixing adhesive (527) is used for fixing the optical film (52) on the die casting (10).

7. The backlight module with the limiting structure according to claim 6, wherein the shapes of the optical films (52) are identical, a limiting clamping lug (529) is arranged on the optical film (52), a film limiting column (161) is further arranged on the second mounting step (16), and the limiting clamping lug (529) is matched with the film limiting column (161);

or/and, the optical film (52) is provided with film pressing foam (528), and the film pressing foam (528) is arranged between the middle iron frame (20) and the optical film (52).

8. The backlight module with the limiting structure according to claim 1, wherein the middle iron frame (20) comprises a bottom plate (21), a buckling plate (22) is formed by extending upwards from the edge position of the bottom plate (21), a T-shaped buckle (221) is arranged on the buckling plate (22), a T-shaped buckle groove (122) is formed in the upper surface of the side plate (12), a T-shaped fixing adhesive (18) is arranged on the T-shaped buckle groove (122), and the T-shaped buckle (221) is fixed in the T-shaped buckle groove (122) through the T-shaped fixing adhesive (18).

9. A backlight module with a limiting structure according to claim 4, wherein a third mounting step (17) is formed on the inner side wall of the side plate (12) towards the geometric center of the back plate (11), the third mounting step (17) is located on the first mounting step (15), and the height of the third mounting step (17) is the same as the depth of the limiting groove (121).

10. The backlight module with the limiting structure according to claim 8, wherein an inner side wall of the side plate (12) is provided with an inner clamping groove (123), a first convex hull (222) is formed on an outer side wall of the buckling plate (22) in a protruding manner, and the first convex hull (222) is matched with the inner clamping groove (123);

or/and, be provided with bending portion (23) on bottom plate (21), be provided with buckle (231) on bending portion (23), be provided with second convex closure (142) on curb plate (12), second convex closure (142) with buckle (231) looks adaptation.

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