Backlight module and display device

Abstract

A backlight module comprises a reflector plate (10) and a lamp panel (20), the reflector plate (10) is provided with a body (11) and two side walls (12), the two side walls (12) are located on the two sides of the body (11) and are oppositely arranged, each side wall (12) is provided with at least one check block (13), the check blocks (13), the two side walls (12) and the bottom of the body (11) form a containing space, the two side edges of the lamp panel (20) are sunken to form at least one receding part (21), and the receding parts (21) are arranged in the containing space. At least one receding part (21) on the edge of each side of the lamp panel (20) corresponds to at least one check block (13) of one side wall (12), the lamp panel (20) is located in the containing space, and the check blocks (13) limit the lamp panel (20) on the reflector plate (10). The invention further discloses a display device which comprises a backlight module and a display panel (60), the display panel (60) is combined with the backlight module, and the lamp panel (20) faces the display panel (60).

Description

Backlight module and display device

[0001] This application claims priority to Chinese patent application No. 202311226119.6, filed on September 21, 2023, entitled “Backlight Module and Display Device,” and all of its contents are incorporated herein by reference. Technical Field

[0002] The invention relates to a backlight module and a display device comprising the backlight module. Background Art

[0003] Backlight modules are widely used to provide light sources for display devices. A direct-lit backlight module generally includes a backplate, a light panel, and a reflector. The light panel is disposed between the backplate and the reflector and projects light onto the reflector.

[0004] When assembling a backlight module, screws are used to set the light panel and reflector on the back panel to assemble the three together. However, the use of screws for assembly results in a backlight module with more components. More components will result in longer assembly and rework time, higher component costs, and longer cleaning time due to more burrs on the components. Therefore, this type of backlight module still has room for improvement.

[0005] Summary of the Invention

[0006] The main purpose of the present invention is to provide a backlight module and a display device, which can reduce the number of components of the backlight module to reduce the time required for assembly and rework, reduce the cost of components, and reduce the time required for cleaning caused by burrs.

[0007] To achieve the aforementioned objectives, the backlight module of the present invention comprises:

[0008] A reflector having a main body and two side walls, the two side walls being located on opposite sides of the main body, each of the side walls being provided with at least one stopper, and a receiving space being formed between the stopper, the two side walls, and the bottom of the main body; and

[0009] A light board, wherein the two side edges of the light board are respectively recessed to form at least one avoidance portion, the at least one avoidance portion of each side edge of the light board corresponds to the at least one stop block of the side wall, the light board is located in the accommodating space, and the stop block limits the light board to the reflective sheet.

[0010] The lamp panel of the backlight module of the present invention is arranged in the accommodating space of the reflective sheet, and the lamp panel is limited on the reflective sheet by the two side walls of the reflective sheet and the at least one stop block. Therefore, the lamp panel and the reflective sheet do not need to be fastened together with screws, which can reduce the use of components and materials, thereby reducing the assembly and rework time, reducing the component cost and reducing the cleaning time. It can also reduce the problem of poor assembly accuracy caused by the cooperation of multiple components and materials, and can improve the product yield.

[0011] When the light board is installed on the reflective sheet, the at least one avoidance portion of the light board is used to allow the at least one stop block of the reflective sheet to pass through, so that the light board is located in the accommodating space. Then, the light board is pushed sideways so that the at least one stop block abuts against the edge of the at least one avoidance portion, thereby limiting the light board to the reflective sheet.

[0012] To achieve the aforementioned objectives, the present invention further provides a display device comprising:

[0013] The above-mentioned backlight module; and

[0014] The display panel is combined with the backlight module, and the light board faces the display panel.

[0015] The display device of the present invention can reduce the use of components and materials by applying the backlight module, thereby reducing assembly defects caused by more components and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is an exploded schematic diagram of a reflective sheet and a light board of a preferred embodiment of a backlight module of the present invention.

[0017] FIG2 is a bottom-up plan view of the assembled reflector sheet and light panel of the backlight module of the present invention.

[0018] FIG3 is a cross-sectional view of the reflective sheet and the light board of the backlight module of the present invention before assembly.

[0019] FIG4 is a schematic cross-sectional view of line AA in FIG2 .

[0020] FIG5 is a partially exploded schematic diagram of the reflector, light panel, and back panel of the backlight module of the present invention.

[0021] FIG6 is a bottom plan view of the back plate of the backlight module of the present invention.

[0022] FIG7 is a schematic cross-sectional view taken along line BB in FIG6 .

[0023] FIG8 is a partially enlarged schematic diagram of FIG7 .

[0024] FIG. 9 is a partial exploded schematic diagram of the backlight module of the present invention.

[0025] FIG10 is a partial three-dimensional schematic diagram of the backlight module of the present invention.

[0026] FIG11 is a schematic top plan view of the backlight module of the present invention.

[0027] FIG12 is a CC cross-sectional view of FIG11 , which includes a schematic diagram of a combination component of an outer frame and a reflective sheet.

[0028] FIG13 is a schematic cross-sectional view taken along line DD of FIG11 , which includes a schematic diagram of the combined components of the outer frame and the back plate.

[0029] FIG14 is a schematic cross-sectional view of a display device according to the present invention. DETAILED DESCRIPTION

[0030] Please refer to FIG. 1 to FIG. 4 , which illustrate a preferred embodiment of a backlight module according to the present invention, including a reflective sheet 10 and a light board 20 .

[0031] As shown in Figures 1 and 4, the reflector 10 has a main body 11 and two side walls 12. The two side walls 12 are located on both sides of the main body 11 and are arranged opposite to each other. Each side wall 12 is respectively provided with at least one stopper 13. An accommodating space 14 is formed between the stopper 13, the two side walls 12 and the bottom of the main body 11.

[0032] As shown in Figures 1, 2 and 4, the two side edges of the lamp board 20 are respectively recessed to form at least one avoidance portion 21. At least one avoidance portion 21 on each side edge of the lamp board 20 corresponds to at least one stop block 13 of the side wall 12. The lamp board 20 is located in the accommodating space 14, and the stop block 13 limits the light board 20 to the reflector 10.

[0033] When the lamp board 20 of the backlight module of the present invention is combined with the reflective sheet 10 from the bottom side of the reflective sheet 10, at least one avoidance portion 21 of the lamp board 20 allows at least one stop block 13 of the side wall 12 of the reflective sheet 10 to pass, so that the lamp board 20 can be accommodated in the accommodating space 14 of the reflective sheet 10, and the lamp board 20 is limited on the reflective sheet 10 by at least one stop block 13. Therefore, there is no need to fasten the lamp board 20 and the reflective sheet 10 with screws, which can reduce the use of components, thereby reducing the assembly and rework time and reducing the component cost. Since there are fewer components, the burrs that may be generated by the components will also be reduced, which can reduce the cleaning time, and can reduce the poor assembly accuracy caused by the cooperation of multiple components, thereby improving the product yield and reliability, and reducing the loss and work time caused by rework due to poor assembly.

[0034] As shown in Figures 3 and 4 , each side edge of the light board 20 is formed with at least one stopper 22, each of which is correspondingly adjacent to at least one avoidance portion 21. After the stopper 13 of the reflector sheet 10 passes through the at least one avoidance portion 21 along the coupling direction D3, the light board 20 moves within the accommodating space 14 along the first direction D1, causing the stopper 13 to be misaligned with the avoidance portion 21 and abutting against the stopper 22. Thus, after the light board 20 moves along the first direction D1, an interference relationship between the light board 20 and the reflector sheet 10 in other directions is created. For example, the light board 20 is restrained along the coupling direction D3, preventing it from dislodging along the coupling direction D3, thereby ensuring the assembly stability of the light board 20 and the reflector sheet 10. Furthermore, the two side walls 12 are spaced apart along the second direction D2, with the light board 20 located between the two side walls 12. Therefore, the light board 20 is also restrained along the second direction D2 by the two side walls 12, and the first direction D1 and the second direction D2 are not parallel to each other.

[0035] Furthermore, as shown in Figures 1 to 3, the reflector sheet 10 has a positioning portion 15. The positioning portion 15 is located between the two side walls 12 and, together with the stopper 13, the two side walls 12, and the bottom of the body 11, forms a housing space 14. The light board 20 can move along a first direction D1 until it abuts the positioning portion 15. The positioning portion 15 can stop the light board 20 in the first direction D1 to prevent it from falling out of the housing space 14, and ensures that at least one stopper 13 of the reflector sheet 10 abuts at least one stopper 22 of the light board 20, thereby improving the assembly stability of the light board 20. The positioning portion 15 can also preferably limit the light board 20 along the assembly direction D3, so that the light board 20 is also limited on the side opposite to the stopper 13.

[0036] Furthermore, each side wall 12 is provided with a plurality of stoppers 13 at intervals, and the side edges of the light panel 20 are formed with a plurality of avoidance portions 21 and a plurality of limiting portions 22 corresponding to the stoppers 13. Each stopper 13 cooperates with a avoidance portion 21 and a limiting portion 22, thereby enhancing the retaining effect of the reflector 10 on the light panel 20. Furthermore, if the backlight module has long and short sides, it is preferred that the two side walls 12 are located on the two opposing long sides of the backlight module, so that each side wall 12 can be provided with a greater number of stoppers 13, thereby further enhancing the retaining effect of the reflector 10 on the light panel 20.

[0037] As shown in Figure 5, the backlight module also includes a back panel 30, which is combined with the reflective sheet 10. The lamp panel 20 is located between the main body 11 of the reflective sheet 10 and the back panel 30, and is limited by the reflective sheet 10 and the back panel 30. For example, it is limited along the combination direction D3, and the back panel 30, the lamp panel 20 and the reflective sheet 10 do not need to be assembled through additional components, which can reduce the use of components. Among them, the back panel 30 can be assembled in the backlight module through different components, which will be explained in detail later.

[0038] Furthermore, as shown in Figures 5 and 6 , the back panel 30 has two side walls 31 formed along the edges of the back panel 30. These side walls 31 and the two side walls 12 of the reflector 10 are located at different positions and together surround the light panel 20. Thus, compared to conventional designs in which a back panel frame defines a housing space, the present invention utilizes the housing space jointly enclosed by the reflector 10 and the back panel 30 to position the light panel 20. Specifically, the two side walls 31 are spaced apart on the back panel 30 along the first direction D1, thereby allowing the back panel 30 to further position the light panel 20 along the first direction D1. Furthermore, there is no wall on the back panel 30 along the second direction D2, and the two side walls 12 of the reflective sheet 10 are spaced apart along the second direction D2. Therefore, the two side walls 31 and the two side walls 12 are located at different positions in the backlight module and do not overlap with each other. This is not only conducive to the narrow frame design of the backlight module, which can shorten the assembly time, but also can reduce the number of side walls of the back panel, thereby reducing the weight of the product.

[0039] Furthermore, as shown in Figures 6 and 7, at least one notch 32 is formed on each of the two side edges of the back panel 30. The position of the at least one notch 32 corresponds to the at least one block 13 of the two side walls 12 of the reflector 10, so that the block 13 can be located in the notch 32. Therefore, in the coupling direction D3, at least one block 13 and the back panel 30 are located at the same height position, so that the back panel 30 is closer to the light board 20 to enhance the limiting effect, and can reduce the overall thickness of the backlight module, which is conducive to the thin design of the backlight module.

[0040] In addition, as shown in Figures 1, 7 and 8, the reflector 10 has at least one combining column 16, and the at least one combining column 16 is provided on the main body 11 and extends toward the back panel 30. The back panel 30 has at least one claw structure 33, and the at least one claw structure 33 clamps at least one combining column 16, so that the back panel 30 and the reflector 10 are assembled and combined. In detail, the back panel 30 moves toward the reflector 10 along the combining direction D3 and passes through at least one through hole 23 of the lamp board 20, so that the at least one claw structure 33 clamps at least one combining column 16, which can also limit the lamp board 20.

[0041] The at least one claw structure 33 includes a plurality of spaced apart clamping jaws 331. The plurality of clamping jaws 331 are resilient. The plurality of clamping jaws 331 of the at least one claw structure 33 pass through the light board 20 and collectively clamp the at least one coupling column 16. When the plurality of clamping jaws 331 of the at least one claw structure 33 contact the at least one coupling column 16, the at least one coupling column 16 opens the plurality of clamping jaws 331, which then move closer to the edge of the through-hole 23 of the light board 20, thereby limiting the position of the light board 20. Furthermore, because the plurality of clamping jaws 331 of the at least one claw structure 33 are resilient, the at least one claw structure 33 is not damaged when the back panel 30 needs to be removed for rework. Therefore, the device can be repeatedly disassembled and re-used without the waste generated when removing screws and the time-consuming cleaning process, effectively improving rework convenience.

[0042] Furthermore, the body 11 of the reflector sheet 10 has multiple reflector cups 17, and the light panel 20 has multiple light-emitting units 24 arranged at intervals. Each light-emitting unit 24 extends into a corresponding reflector cup 17. At least one coupling column 16 is formed between adjacent reflector cups 17 and located on the side of the reflector sheet 10 facing the back panel 30, thereby not affecting the optical quality. Furthermore, the back panel 30 is provided with multiple claw structures 33 at intervals, and the reflector sheet 10 has multiple corresponding coupling columns 16. Each claw structure 33 clamps a coupling column 16. By increasing the number of claw structures 33, the assembly stability of the back panel 30 can be improved.

[0043] As shown in Figures 9 to 11 , the backlight module further includes an outer frame 40 having a plurality of first buckles 41 spaced apart from one another along a first axis. The reflector 10 has a plurality of second buckles 18 located on two sidewalls 12 . The first buckles 41 are respectively engaged with the second buckles 18 , thereby coupling the outer frame 40 to the reflector 10 . Therefore, the outer frame 40 does not require additional components for assembly, thereby improving assembly convenience. In this embodiment, the first axis is parallel to the first direction D1 .

[0044] In addition, as shown in Figures 9 and 12, in this embodiment, the first buckle portion 41 is in the shape of a hole, and the second buckle portion 18 is in the shape of a convex buckle. When the outer frame 40 is combined with the reflector 10 in the opposite direction of the combination direction D3, the convex buckle of each second buckle portion 18 extends into the corresponding hole of the first buckle portion 41, so that the first buckle portion 41 and the second buckle portion 18 are combined with each other and limited. In other embodiments, the first buckle portion 41 can be in the shape of a convex buckle, and the second buckle portion 18 can be in the shape of a hole, which can also enable the first buckle portion 41 to be combined with the second buckle portion 18.

[0045] 9 and 10 , the outer frame 40 has a plurality of first coupling portions 42 , which are spaced apart from each other on the second axis. The first axis and the second axis are not parallel to each other. The back panel 30 has a plurality of second coupling portions 34 , which are respectively coupled to the plurality of second coupling portions 34 , thereby coupling the outer frame 40 to the back panel 30 . Therefore, the outer frame 40 is coupled to the reflective sheet 10 and the back panel 30 , respectively, and the back panel 30 can also be coupled to the reflective sheet 10 through the outer frame 40 . By coupling the plurality of components to each other, the overall assembly stability of the backlight module can be improved. Preferably, in this embodiment, the second axis is parallel to the second direction D2 . The plurality of second coupling portions 34 are formed on the side walls 31 of the back panel 30 , and the two side walls 31 and the two side walls 12 of the reflective sheet 10 are located at different positions. Therefore, different sides of the outer frame 40 are coupled to the reflective sheet 10 and the back panel 30 , respectively, thereby improving the assembly stability of the outer frame 40 .

[0046] In addition, as shown in Figures 9 and 13, in this embodiment, the first connecting portion 42 is in the shape of an opening, and the second connecting portion 34 is in the shape of a fastener. When the outer frame 40 is connected to the reflector 10 in the opposite direction of the connection direction D3, the outer frame 40 will be connected to the back plate 30, so that the fastener of each second connecting portion 34 extends into the corresponding opening of the first connecting portion 42, so that the first connecting portion 42 and the second connecting portion 34 are connected to each other and limited. In other embodiments, the first connecting portion 42 can be in the shape of a fastener, and the second connecting portion 34 can be in the shape of an opening, so that the first connecting portion 42 and the second connecting portion 34 can also be connected.

[0047] In summary, after the lamp panel 20 is limited along the coupling direction D3 so that the lamp panel 20 does not fall out along the coupling direction D3, the next step is to fix the reflective sheet 10 between the back panel 30 and the outer frame 40. As shown in Figures 7 and 8, in the coupling direction D3, the back panel 30 moves toward the reflective sheet 10 along the coupling direction D3 and passes through at least one through hole 23 of the lamp panel 20, so that at least one claw structure 33 of the back panel 30 clamps at least one coupling column 16 of the reflective sheet 10. On the other hand, as shown in Figure 12, in the first direction D1, the first buckle 41 of the outer frame 40 and the second buckle 18 of the reflective sheet 10 are coupled to each other and limited. On the other hand, as shown in Figure 13, in the second direction D2, the first coupling portion 42 of the outer frame 40 and the second coupling portion 34 of the back panel 30 are coupled to each other and limited. Therefore, this embodiment can use a composite component structure to achieve the support and fixation effect of the mechanism design.

[0048] As shown in Figures 9 and 10, the backlight module further includes at least one optical film 50. The at least one optical film 50 is located on the side of the reflector 10 away from the light board 20 and is located between the outer frame 40 and the reflector 10. Therefore, the outer frame 40 and the reflector 10 can be used to limit the position, thereby improving the assembly stability of the at least one optical film 50.

[0049] Please refer to Figure 14, which is a preferred embodiment of the display device provided by the present invention, which includes a backlight module and a display panel 60. The display panel 60 is combined with the backlight module, and the lamp board 20 faces the display panel 60, so the lamp board 20 can cast light on the display panel 60. The display device of the present invention uses a backlight module to reduce the use of components and reduce the residual burrs and foreign matter, and can be easily cleaned, thereby reducing costs and assembly and rework time, and reducing rework time and material costs caused by poor assembly. The assembly time of the backlight module is about 15 seconds, and the disassembly and rework time is about 5 seconds. The assembly time of the conventional backlight module assembled with screws is about 25 seconds, and the disassembly and rework time is about 15 seconds. It is obvious that the backlight module can indeed reduce the assembly and rework time.

[0050] In summary, the backlight module utilizes a structural design to combine and assemble the reflector 10, the light panel 20, the back panel 30, the outer frame 40 and at least one optical film 50, thereby reducing the use of components, thereby reducing component costs, reducing assembly and rework time and cleaning time, and avoiding poor assembly accuracy caused by the coordination of multiple components to assemble, thereby improving product yield and avoiding rework.

[0051] The above descriptions are merely preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of protection of the present invention should fall within the scope of the present invention.

[0052] Reference Signs List

[0053] 10: Reflective sheet

[0054] 11:Ontology

[0055] 12: Side Wall

[0056] 13: Stopper

[0057] 14: Storage space

[0058] 15: Positioning part

[0059] 16: Binding column

[0060] 17: Reflection cup

[0061] 18: Second buckle

[0062] 20: Light board

[0063] 21: Avoidance

[0064] 22: Limiting part

[0065] 23:Through hole

[0066] 24: Light-emitting unit

[0067] 30: Back panel

[0068] 31: Side Wall

[0069] 32: Gap

[0070] 33: Claw structure

[0071] 331: Gripper

[0072] 34: Second joint

[0073] 40: Outer frame

[0074] 41: First buckle

[0075] 42: First joint

[0076] 50: Optical film

[0077] 60: Display panel

[0078] D1: First direction

[0079] D2: Second direction

[0080] D3: Binding direction.

Claims

1. A backlight module, comprising: A reflector, the reflector having a main body and two side walls, the two side walls are located on both sides of the main body and are arranged opposite to each other, each of the side walls is respectively provided with at least one stopper, and an accommodation space is formed between the stopper, the two side walls and the bottom of the main body; and A light board, wherein the two side edges of the light board are respectively recessed to form at least one avoidance portion, the at least one avoidance portion of each side edge of the light board corresponds to the at least one stopper of the side wall, the light board is located in the accommodating space, and the stopper limits the light board to be located on the reflective sheet.

2. The backlight module according to claim 1, wherein: At least one limiting portion is formed on each side edge of the lamp board, and the at least one limiting portion corresponds to and is adjacent to the at least one avoiding portion. After the at least one avoiding portion allows the blocking block of the reflective sheet to pass through along the combining direction, the lamp board moves along the first direction in the accommodating space, so that the blocking block is misaligned with the avoiding portion and abuts against the limiting portion.

3. The backlight module according to claim 1, wherein: The reflector sheet has a positioning portion, which is located between the two side walls and is framed together with the stopper, the two side walls and the bottom of the body to form the accommodating space. The lamp panel can move along a first direction to abut against the positioning portion.

4. The backlight module according to claim 1, wherein: The backlight module comprises a back plate, the back plate is combined with the reflective sheet, the light board is located between the body of the reflective sheet and the back plate, and is limited by the reflective sheet and the back plate.

5. The backlight module according to claim 4, wherein: The reflector sheet has at least one combining column, which is arranged on the body and extends toward the back plate. The back plate has at least one claw structure, which clamps the at least one combining column to assemble and combine the back plate with the reflector sheet.

6. The backlight module according to claim 5, wherein: Each of the at least one claw structure has a plurality of clamping claws arranged at intervals, and the plurality of clamping claws are elastic. The plurality of clamping claws of the at least one claw structure pass through the lamp board and clamp the at least one combining column together.

7. The backlight module according to claim 4, wherein: At least one notch is formed on two side edges of the back plate respectively, and the positions of the at least one notch respectively correspond to the at least one stopper on the two side walls of the reflector sheet, so that the stopper is located in the notch.

8. The backlight module according to claim 4, wherein: The back plate has two side walls, the two side walls are formed at the edge of the back plate, and the two side walls and the two side walls of the reflection sheet are located at different positions and surround the light board together.

9. The backlight module according to any one of claims 1 to 8, wherein: The backlight module includes an outer frame, the outer frame has a plurality of first buckles, the plurality of first buckles are spaced apart from each other on a first axis, the reflector has a plurality of second buckles, the plurality of second buckles are located on the two side walls, and the plurality of first buckles are respectively combined with the plurality of second buckles.

10. The backlight module according to claim 9, wherein: The outer frame has a plurality of first combining parts, the plurality of first combining parts are spaced apart from each other on a second axis, the first axis and the second axis are not parallel to each other, and the back plate has a plurality of second combining parts, the plurality of first combining parts are respectively correspondingly combined with the plurality of second combining parts.

11. The backlight module according to claim 9, wherein: The backlight module comprises at least one optical film, and the at least one optical film is located on a side of the reflective sheet away from the light board and between the outer frame and the reflective sheet.

12. A display device, comprising: The backlight module according to any one of claims 1 to 11; and The display panel is combined with the backlight module, and the light board faces the display panel.

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