Backlight module and display equipment

Abstract

The utility model discloses a backlight module and a display device, the backlight module comprises a back plate, a middle frame, an optical assembly and a plurality of fasteners, and the outer side wall of the back plate is provided with a plurality of threaded holes; a plurality of first through holes penetrate through the middle frame; the optical assembly comprises reflection paper, a diffusion plate and an optical film, the optical film comprises a film body and a plurality of lugs vertically connected with the two ends of the film body respectively, the reflection paper, the diffusion plate and the film body are sequentially stacked on the back plate from bottom to top, the lugs are clamped between the middle frame and the back plate, and second penetrating holes are formed in the lugs in a penetrating mode; and each fastener sequentially penetrates through the corresponding first through hole and the corresponding second through hole and then is in threaded connection with the corresponding threaded hole. According to the utility model, the lugs in the optical film are fixed on the outer side wall surface of the back plate, the optical film can be mounted without too large mounting space, and the structural design can ensure that a very small gap is reserved between the film main body in the optical film and the back plate, so that the ultra-narrow and ultra-thin design of the display equipment is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic device structures, in particular to a backlight module and a display device. Background Art

[0002] At present, in existing image display device products such as computer liquid crystal screens and televisions, user requirements are becoming more and more demanding, and more people choose ultra-narrow and ultra-thin display devices. In order to achieve an ultra-narrow, ultra-thin and aesthetically pleasing design, higher requirements are put forward for the structure of the display device. In the film fixing structure inside the display device, the film is a key component, and the stability and reliability of film installation directly affect the performance and service life of the display device.

[0003] In the traditional film fixing structure, generally, a method such as Figure 1 shown in pressing riveting posts 10 is adopted. The riveting posts 10 are pressed on the back plate 20 and the riveting posts 10 are used as lugs 30, or a method such as Figure 2 shown is adopted to flanging a part of the structure of the back plate 20 as the lug 30, and the film is suspended on the lug 30 through the hanging holes thereon. However, both of the above two methods require a large installation space, which will increase the BM areas on both left and right sides of the display device. For some display devices with limited space, the traditional film fixing structure is not suitable and cannot be effectively installed and implemented. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a backlight module and a display device to solve the technical problem that in the existing film fixing structure, generally, a method of pressing riveting posts is adopted, the riveting posts are pressed on the back plate and the riveting posts are used as lugs, or a part of the structure of the back plate is flanged as the lug, and the film is suspended on the lug through the hanging holes thereon. Both of these two methods require a large installation space, which will increase the BM areas on both left and right sides of the display device. For some display devices with limited space, the traditional film fixing structure is not suitable and cannot be effectively installed and implemented.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a backlight module, including:

[0007] A back plate, on the outer side wall of which a plurality of threaded holes are provided;

[0008] A middle frame, which is provided with a plurality of first through holes penetrating therethrough;

[0009] Optical component, the optical component includes a reflective paper, a diffusion plate, and an optical film. The optical film includes a film body and a plurality of lugs respectively perpendicularly connected to both ends of the film body. The reflective paper, the diffusion plate, and the film body are sequentially stacked on the back plate from bottom to top. The lugs are clamped between the middle frame and the back plate, and the lugs are provided with second through holes;

[0010] A plurality of fasteners, each of the fasteners respectively passes through the corresponding first through hole and the second through hole in sequence and is threadedly connected to the corresponding threaded hole.

[0011] Further, a stitching line is provided at the connection between the film body and the lugs, and the lugs are perpendicular to the film body through the stitching line.

[0012] Further, the backlight module further includes a double-sided adhesive, and the lugs are adhered to the outer side wall of the back plate through the double-sided adhesive.

[0013] Further, the back plate includes a substrate and a support plate perpendicularly connected to the edge of the substrate. At least one protruding portion is provided on the surface of the substrate facing the reflective paper, and the protruding portion abuts against the reflective paper. The lugs are clamped between the middle frame and the support plate, and the threaded holes are provided on the support plate.

[0014] Further, the back plate further includes a plurality of positioning blocks, each of the positioning blocks protrudes from the surface of the support plate away from the protruding portion. The middle frame is further provided with a plurality of positioning holes, and the positioning holes are spaced from the first through holes. Each of the positioning blocks is respectively inserted into each of the positioning holes.

[0015] Further, the middle frame includes a frame body and a side branch arm perpendicularly connected to one end of the frame body. The lugs are clamped between the side branch arm and the back plate, the first through holes are provided through the side branch arm, and the frame body covers the lugs and part of the film body.

[0016] Further, the backlight module further includes a first buffer pad, and the first buffer pad is installed on the surface of the frame body facing the optical film, and the first buffer pad is spaced from the optical film.

[0017] Further, the backlight module further includes a liquid crystal panel and a second buffer pad. The liquid crystal panel is located on the side of the frame body away from the optical film, and the liquid crystal panel is installed on the frame body through the second buffer pad.

[0018] Further, the backlight module further includes a light bar, and the light bar is installed on the back plate, and the light bar is correspondingly arranged with the side surface of the diffusion plate.

[0019] The present utility model further provides a display device, including the backlight module as described above.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] In the present utility model, the optical film includes a film body and a plurality of lugs perpendicularly connected to both ends of the film body respectively. The lugs are clamped between the middle frame and the back plate. A fastener can pass through the middle frame and the lugs in sequence and then be threadedly connected to the outer wall of the back plate, so as to fix the lugs in the optical film on the outer wall surface of the back plate. The installation of the optical film does not require a large installation space, the operation is simple, and the performance is stable and reliable. It is suitable for installing the optical film in some occasions with limited space. Moreover, this structural design can ensure that a very small gap is reserved between the film body in the optical film and the back plate, the BM area is small, and the ultra-narrow and ultra-thin design of the display device is realized. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a rivet post riveted on a back plate in a traditional film fixing structure;

[0023] Figure 2 It is a schematic structural diagram after flanging a part of the structure of the back plate in a traditional film fixing structure;

[0024] Figure 3 It is a partial cross-sectional view of the backlight module provided by an embodiment of the present utility model;

[0025] Figure 4 It is a partial cross-sectional view of the middle frame provided by an embodiment of the present utility model;

[0026] Figure 5 It is a schematic structural diagram of the optical film provided by an embodiment of the present utility model;

[0027] Figure 6 For Figure 5 A partial enlarged schematic view at A in

[0028] Figure 7 It is a schematic structural diagram of the back plate provided by an embodiment of the present utility model;

[0029] Figure 8 For Figure 7 A partial enlarged schematic view at B in

[0030] Figure 9 It is a schematic structural diagram of an optical component installed on a back plate provided by an embodiment of the present utility model;

[0031] Figure 10 For Figure 9 A partial enlarged schematic view at C in

[0032] Figure 11Schematic diagram of the structure after combining the optical component, backplane and middle frame provided by the embodiment of the present utility model;

[0033] Figure 12 is Figure 11 Partial enlarged schematic diagram at D in the figure;

[0034] Figure 13 Schematic diagram of the structure after combining the optical component, backplane, middle frame and fastener provided by the embodiment of the present utility model;

[0035] Figure 14 is Figure 13 Partial enlarged schematic diagram at E in the figure.

[0036] In the figure:

[0037] 10. Riveting post; 20. Backplane; 21. Flange; 22. Threaded hole; 23. Substrate; 231. Protrusion; 232. Bottom plate; 24. Support plate; 25. Positioning block; 30. Hanging ear; 40. Middle frame; 41. First through hole; 42. Positioning hole; 43. Frame body; 44. Side support arm; 50. Optical component; 51. Reflective paper; 52. Diffusion plate; 53. Optical film; 531. Film body; 532. Lug; 5321. Second through hole; 533. Stitching line; 60. Fastener; 70. First buffer pad; 80. Liquid crystal panel; 90. Second buffer pad. Specific embodiments

[0038] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of non-conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0039] Please refer to Figures 3 to 10 As shown, the embodiment of the present utility model discloses a backlight module, which is mainly applied to a display device. The backlight module includes a backplane 20, a middle frame 40, an optical component 50 and a plurality of fasteners 60. A plurality of threaded holes 22 are provided at intervals on the outer side wall of the backplane 20, and a plurality of first through holes 41 are provided through the middle frame 40, and each first through hole 41 is correspondingly arranged with each threaded hole 22.

[0040] The optical component 50 includes a reflective paper 51, a diffusion plate 52, and an optical film 53. The optical film 53 includes a film body 531 and a plurality of lugs 532 perpendicularly connected to both side ends of the film body 531. The lugs 532 are arranged at 90 degrees to the film body 531. The reflective paper 51, the diffusion plate 52, and the film body 531 are sequentially stacked on the inner wall of the backplate 20 from bottom to top. The lugs 532 are clamped between the inner side wall of the middle frame 40 and the outer side wall of the backplate 20. The lugs 532 are provided with second through holes 5321. The number of the fasteners 60, the first through holes 41, the second through holes 5321, and the threaded holes 22 can be determined according to the size and fixing requirements of the backlight module. In this embodiment, the number of the fasteners 60, the first through holes 41, the second through holes 5321, and the threaded holes 22 is four. The number of the second through holes 5321 matches the number of the lugs 532. Each fastener 60 sequentially passes through the corresponding first through hole 41 and second through hole 5321 and is threadedly connected to the corresponding threaded hole 22, so as to fix the lugs 532 in the optical film 53 on the outer side wall surface of the backplate 20. The optical film 53 does not require a large installation space during fixation and is suitable for installing the optical film 53 in some occasions with limited space, which can ensure a very small gap is reserved between the film body 531 in the optical film 53 and the backplate 20, realizing the ultra-narrow and ultra-thin design of the display device.

[0041] In some embodiments, the fastener 60 is a screw, the first through hole 41 is a countersunk hole, and the second through hole 5321 is a through hole. Designing the first through hole 41 as a countersunk hole can prevent the fastener 60 from protruding outside the middle frame 40 after fixation, increasing the aesthetics of the backlight module.

[0042] In this embodiment, a stitch line 533 is provided at the connection between the film body 531 and the lugs 532. Before installing the optical film 53, both the lugs 532 and the film body 531 are horizontally arranged. The optical film 53 reserves the stitch line 533, which can quickly bend the lugs 532 at will by 90 degrees, so that the lugs 532 are perpendicular to the film body 531 through the stitch line 533. Then, the lugs 532 in the optical film 53 are fixed on the outer side wall of the backplate 20 by using the fasteners 60, improving the fixing strength of the optical film 53 without complex assembly processes. At the same time, a very small gap is reserved between the film body 531 in the optical film 53 and the backplate 20. The smaller the gap between the film body 531 and the backplate 20, the more the ultra-narrow design of the frame or black edge of the backlight module can be realized.

[0043] In some embodiments, the backlight module further includes double-sided tape. The lugs 532 are adhered to the outer side wall of the backplate 20 through the double-sided tape, which can ensure the fixing accuracy of the optical film 53 before tightening the fasteners 60, prevent assembly errors caused by misalignment of the optical film 53, and improve the assembly accuracy of the backlight module.

[0044] Please further refer to Figure 3 and Figures 9 to 14 In this embodiment, the backplane 20 includes a substrate 23 and a support plate 24 vertically connected to the edge of the substrate 23. At least one protrusion 231 is provided on the side of the substrate 23 facing the reflective paper 51. The protrusion 231 abuts against the reflective paper 51 to adjust the installation position of the optical film 53, so that the lug 532 of the optical film 53 can be smoothly clamped between the middle frame 40 and the support plate 24 after being bent. The threaded hole 22 is provided on the support plate 24.

[0045] In some embodiments, the substrate 23 includes a bottom plate 232 and a plurality of spaced protrusions 231. The bottom plate 232 is provided with through holes. Each protrusion 231 is respectively connected to the inner wall of each through hole. The protrusion 231 is formed by stamping the substrate 23 on a stamping machine.

[0046] The backplane 20 further includes a plurality of positioning blocks 25. Each positioning block 25 protrudes from the side of the support plate 24 away from the protrusion 231. The middle frame 40 is also provided with a plurality of positioning holes 42. The positioning holes 42 are spaced from the first through hole 41. When the backplane 20 is fixed to the middle frame 40, at this time the lug 532 is clamped between the middle frame 40 and the backplane 20, and the positioning blocks 25 are staggered from the lug 532. Each positioning block 25 is respectively inserted into each positioning hole 42.

[0047] Please continue to refer to Figures 3 to 5 In this embodiment, the middle frame 40 includes a frame body 43 and a side support arm 44 vertically connected to one end of the frame body 43. The cross-section of the middle frame 40 is an "L" - shaped structure. The side support arm 44 is perpendicular to the edge of the frame body 43. The lug 532 is clamped between the side support arm 44 and the backplane 20. The first through hole 41 is provided through the side support arm 44. The backplane 20 and the middle frame 40 only need to reserve hole positions on the side, without stamping complex structures or installing additional connecting parts, thereby improving the quality of the backlight module, reducing the production cost, and the frame body 43 covers the lug 532 and part of the film body 531 to form a smaller BM area, and a narrow border structure design can be realized.

[0048] The backlight module further includes a first buffer pad 70. The first buffer pad 70 is installed on the side of the frame body 43 facing the optical film 53. The first buffer pad 70 is spaced from the optical film 53 to protect the optical film 53 and prevent the optical film 53 from being damaged when it collides with the frame body 43. The first buffer pad 70 can be a buffer sponge.

[0049] The backlight module further includes a liquid crystal panel 80 and a second buffer pad 90. The liquid crystal panel 80 is located on the side of the frame body 43 away from the optical film 53. The liquid crystal panel 80 is mounted on the frame body 43 through the second buffer pad 90 to fix the liquid crystal panel 80 on the middle frame 40. The second buffer pad 90 can be a buffer sponge. The first buffer pad 70 and the second buffer pad 90 can enhance the flexibility of the backlight module.

[0050] The backlight module further includes a light bar, which is installed on the inner wall of the back plate 20. The light bar is arranged corresponding to the side surface of the diffusion plate 52. The light emitted by the light bar can be refracted and reflected by the optical component 50 and then emitted.

[0051] In this embodiment, the light bar is used to emit light. A part of the light enters the diffusion plate 52 and then propagates upward, and another part of the light enters the diffusion plate 52 and then propagates downward. The reflective paper 51 will turn the downward light and make it propagate upward to form dot matrix light. The optical film 53 will correct the propagation direction of the light and convert the dot matrix light into a surface array light. Finally, the light enters the liquid crystal panel 80. The liquid crystal panel 80 is powered on to generate an image. The back plate 20 is used to protect the reflective paper 51 to prevent it from being collided by foreign objects.

[0052] The present utility model also discloses a display device, including the backlight module as described above. In this embodiment, the side-in type module is used as an example for description. Of course, the direct-lit type module structure is also applicable.

[0053] Installation principle of the backlight module:

[0054] First, install the light bar on the inner side wall of the back plate 20, and then stack the reflective paper 51, the diffusion plate 52 and the optical film 53 on the protruding part 231 of the back plate 20 in sequence from bottom to top. Bend the lug 532 on the optical film 53 by 90 degrees and attach it to the outer side wall of the back plate 20. The light bar is spaced from the side surface of the diffusion plate 52. Then, install the first buffer pad 70 on the side of the frame body 43 of the middle frame 40 facing the optical film 53. The lug 532 is clamped between the inner side wall of the middle frame 40 and the outer side wall of the back plate 20. Use the fastener 60 to pass through the first through hole 41 of the middle frame 40 and the second through hole 5321 of the lug 532 in sequence and then threadedly connect with the threaded hole 22 in the back plate 20, so as to fix the lug 532 in the optical film 53 on the outer side wall surface of the back plate 20. Finally, install the liquid crystal panel 80 on the frame body 43 of the middle frame 40 through the second buffer pad 90 to complete the assembly.

[0055] Beneficial effects of the backlight module:

[0056] 1. In the backlight module, a fastener 60 is used to fix the lug 532 in the optical film 53 on the outer side wall surface of the back plate 20. The installation operation is simple, and the performance is stable and reliable. At the same time, this structure can ensure a very small gap is reserved between the film body 531 in the optical film 53 and the back plate 20, achieving an ultra-narrow and ultra-thin design;

[0057] 2. The structure is simplified. The back plate 20 and the middle frame 40 only need to reserve hole positions on the side, without stamping complex structures or installing additional connecting parts, improving the product quality and reducing the production cost;

[0058] 3. The assembly is simple. The optical film 53 reserves a stitching line 533, and the lug 532 can be folded at will by 90 degrees. The middle frame 40 is assembled to fix it, without complex assembly processes;

[0059] 4. Space is saved. The lug 532 is directly fixed on the outer side surface of the back plate 20, reducing the space of the lug 532 inside the back plate 20 and reducing the gap between the film body 531 and the back plate 20;

[0060] 5. It is firm and reliable. Using the fastener 60 to fix the optical film 53 can effectively prevent the optical film 53 from loosening and falling off during use.

[0061] In summary, in the present utility model, the optical film 53 includes a film body 531 and a plurality of lugs 532 that are perpendicularly connected to both ends of the film body 531 respectively. The lugs 532 are clamped between the middle frame 40 and the back plate 20. The fastener 60 can pass through the middle frame 40 and the lug 532 in sequence and then be threadedly connected to the back plate 20, so as to fix the lug 532 in the optical film 53 on the outer side wall surface of the back plate 20. The installation of the optical film 53 does not require too much installation space, the operation is simple, and the performance is stable and reliable. It is suitable for installing the optical film 53 in some occasions with limited space. And this structural design can ensure a very small gap is reserved between the film body 531 in the optical film 53 and the back plate 20, the BM area is small, achieving the ultra-narrow and ultra-thin design of the display device.

[0062] The above embodiments are only the preferred embodiments of the present utility model, and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model belong to the scope of protection required by the present utility model.

Claims

1. A backlight module, characterized in that: include: A back plate, wherein the outer side wall of the back plate is provided with a plurality of threaded holes; A middle frame, wherein the middle frame is provided with a plurality of first through holes; An optical component, the optical component includes a reflective paper, a diffuser plate and an optical film, the optical film includes a film body and a plurality of lugs respectively connected perpendicularly to two ends of the film body, the reflective paper, the diffuser plate and the film body are sequentially stacked on the back plate from bottom to top, the lug is clamped between the middle frame and the back plate, and the lug is penetrated by a second through hole; A plurality of fasteners are provided, each of which passes through the corresponding first through-hole and second through-hole in sequence and is threadedly connected with the corresponding threaded hole.

2. The backlight module according to claim 1, characterized in that: A saddle line is provided at the connection between the diaphragm body and the lug, and the lug is perpendicular to the diaphragm body through the saddle line.

3. The backlight module according to claim 1, characterized in that: The backlight module further comprises a double-sided adhesive tape, and the lug is bonded to the outer side wall of the back plate via the double-sided adhesive tape.

4. The backlight module according to claim 1, characterized in that: The back plate includes a substrate and a support plate vertically connected to the edge of the substrate. The substrate is provided with at least one protrusion on a side facing the reflective paper, and the protrusion abuts against the reflective paper. The lug is clamped between the middle frame and the support plate, and the threaded hole is provided on the support plate.

5. The backlight module according to claim 4, characterized in that: The back plate also includes a plurality of positioning blocks, each of which is protruding from a side of the support plate away from the protruding portion. The middle frame is also penetrated by a plurality of positioning holes, which are spaced apart from the first perforations, and each of the positioning blocks is inserted into each of the positioning holes.

6. The backlight module according to claim 1, characterized in that: The middle frame includes a frame body and a side arm vertically connected to one end of the frame body, the lug is clamped between the side arm and the back plate, the first through hole is penetrated on the side arm, and the frame body covers the lug and part of the diaphragm body.

7. The backlight module according to claim 6, characterized in that: The backlight module further includes a first buffer pad, which is installed on a surface of the frame body facing the optical film, and the first buffer pad is spaced apart from the optical film.

8. The backlight module according to claim 6, characterized in that: The backlight module further includes a liquid crystal panel and a second buffer pad. The liquid crystal panel is located on a side of the frame away from the optical film. The liquid crystal panel is mounted on the frame via the second buffer pad.

9. The backlight module according to claim 1, characterized in that: The backlight module further comprises a light bar, which is mounted on the back plate and is arranged corresponding to the side surface of the diffusion plate.

10. A display device, characterized in that: It comprises the backlight module as described in any one of claims 1 to 9.

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