TWI862079B - Backlight module and display device - Google Patents

Abstract

The backlight module of the present invention comprises a back plate and a frame, the frame is arranged on the back plate along a combination direction, the frame has a limiting structure, the backlight module of the present invention can further fix and limit multiple components to each other through the limiting structure of the back plate and the frame, for example, a reflector is arranged on the back plate and is combined with the limiting structure along the combination direction, a light guide plate has a mounting structure, the mounting structure corresponds to the limiting structure combined with the frame along the combination direction, the reflector is limited between the back plate and the light guide plate, at least one optical film is combined with the mounting structure of the light guide plate, a light strip is arranged on the back plate and is abutted and limited by the limiting structure, so the various components in the backlight module do not need to be fixed by adhesive tape, which can improve the convenience of assembly. The display device provided by the present invention also applies the backlight module.

Description

Backlight module and display device

The present invention relates to a backlight module, in particular to a backlight module capable of improving assembly convenience, and a display device using the backlight module.

Today's backlight modules usually include a backplane, a frame, a reflector, a light guide plate, a light-emitting element, and an optical film. When assembling the backlight module, the frame is combined with the backplane, and the light-emitting element is set in the backplane. Then, the reflector, light guide plate, and optical film are sequentially set on the backplane to complete the assembly operation.

However, currently, the light emitting element, reflector, light guide plate and optical film are respectively fixed with adhesive tapes, and a mounting fixture is required to accurately align the components, which makes the assembly process inconvenient and time-consuming. If rework is required, not only will there be adhesive residues on the surface of the components, which requires more manpower and hours to deal with the adhesive residue problem, but even during removal, the optical film and other fragile components are easily scratched and cannot be reused.

The main purpose of the present invention is to provide a backlight module that can fix multiple parts to each other and reduce the cost of tape or assembly jigs.

Another object of the present invention is to provide a display device that can be easily reassembled.

To achieve the above-mentioned purpose, the backlight module of the present invention includes: a back plate; a frame, which is arranged on the back plate along a coupling direction, and the frame has a limiting structure; a reflector, which is arranged on the back plate and has an assembly part, and the assembly part corresponds to the limiting structure of the frame along the coupling direction; and a light guide plate, which has a mounting structure, and the mounting structure corresponds to the limiting structure of the frame along the coupling direction to limit the assembly part, so as to limit the reflector between the back plate and the light guide plate.

The backlight module of the present invention can further fix and limit multiple parts to each other through the limiting structure of the back plate and the frame. For example, the reflector is combined with the limiting structure of the frame through the assembly part, and the light guide plate is combined with the limiting structure of the frame through the installation structure. Therefore, the assembly part of the reflector will be limited by the light guide plate and the frame, so the reflector and the light guide plate do not need to be fixed by adhesive tape, and the back plate, the reflector and the light guide plate are stacked and assembled in sequence in the combining direction, so as to achieve the purpose of reducing the cost of adhesive tape or assembly jigs.

To achieve the above-mentioned purpose, the present invention further provides a backlight module comprising: a back plate; a frame, which is arranged on the back plate along a coupling direction, and the frame has a limit structure; a light guide plate, which has a mounting structure, and the mounting structure forms a mounting groove, and the light guide plate is correspondingly coupled to the limit structure of the frame along the coupling direction, so that the limit structure of the frame extends into the mounting groove of the mounting structure; and at least one optical film, the at least one optical film has a mounting portion, the at least one optical film is arranged on the light guide plate, and the mounting portion is coupled to the mounting structure.

The backlight module of the present invention can fix and limit multiple parts to each other. For example, the at least one optical film is set on the light guide plate by the installation part being combined with the installation structure of the light guide plate, and the light guide plate is fixed by the concave-convex fit between the installation groove of the installation structure and the limiting structure of the frame. Therefore, the light guide plate and the at least one optical film do not need to be fixed by adhesive tape.

To achieve the above-mentioned purpose, the present invention further provides a backlight module comprising: a back plate; a frame, which is arranged on the back plate along a coupling direction, and has a limiting wall and a limiting structure arranged at intervals, and a receiving gap is formed between the limiting structure and the limiting wall along a pushing direction; and a light strip, which is arranged on the back plate and extends into the receiving gap along the pushing direction, and the limiting structure abuts against the light strip to limit the light strip.

The backlight module of the present invention can fix and limit multiple parts to each other, wherein the frame is combined with the back plate along the combination direction, and the light strip is pushed into the limiting structure of the frame along the pushing direction and extends into the accommodating gap, so that the light strip is limited by the frame and the back plate together, so the light strip does not need to be fixed by adhesive tape.

To achieve the above-mentioned purpose, the present invention further provides a display device comprising: A backlight module as described above; and A display panel, which is disposed on the backlight module and is located on a side of the back plate opposite to the bonding direction.

The display device of the present invention is applied with the backlight module. Since the components in the backlight module do not need to be fixed by adhesive tape, and each component in the backlight module is limited or assembled by the limiting structure of the frame or the mounting structure of the light guide plate through different structures, the components do not need to be aligned by a fixture and can be accurately aligned and assembled. Therefore, the convenience of the overall assembly can be improved, the assembly time can be shortened, and the assembly yield can be improved. In addition, each component can be repeatedly disassembled and assembled, so the rework performance is good.

Please refer to Figures 1 to 5, which are a preferred embodiment of the backlight module of the present invention. The backlight module includes a back plate 10 and a frame 20. The frame 20 is arranged on the back plate 10 along a coupling direction D1. The frame 20 has a limiting structure 21. The backlight module can include different other components as required. The other components in the backlight module can be directly or indirectly limited by the limiting structure 21 of the frame 20, thereby providing a backlight module in which each component does not need to be fixed by adhesive tape, thereby improving the convenience of the overall assembly of the backlight module.

The following will describe the assembly and combination relationship of different components of the present invention, for example, the assembly and combination relationship between the back plate 10, the frame 20, a reflective sheet 30 and a light guide plate 40. Please refer to FIG. 5. The frame 20 is arranged on the back plate 10 along the combination direction D1, and the frame 20 has the limiting structure 21; the reflective sheet 30 is arranged on the back plate 10 and has an assembly part 31, and the assembly part 31 is arranged along the combination direction D1. D1 corresponds to the limiting structure 21 combined with the frame 20; the light guide plate 40 has a mounting structure 41, and the mounting structure 41 corresponds to the limiting structure 21 combined with the frame 20 along the combining direction D1 to limit the assembly part 31, so as to limit the reflective sheet 30 between the back plate 10 and the light guide plate 40. This embodiment mainly provides a structure for limiting the reflective sheet 30 through the light guide plate 40 and the frame 20. In more detail, the reflective sheet 30 is sandwiched between the back plate 10 and the light guide plate 40, and the edge of the reflective sheet 30 extends toward the frame 20 to form the assembly portion 31. At the same time, the edge of the light guide plate 40 corresponding to the assembly portion 31 also extends toward the frame 20 to form the mounting structure 41. After the assembly portion 31 of the reflective sheet 30 and the limiting structure 21 of the frame 20 are combined with each other, the light guide plate 40 is The mounting structure 41 of the frame 20 is combined with the limiting structure 21 of the frame 20 along the combining direction D1, so that the three components of the frame 20, the reflector 30 and the light guide plate 40 can be assembled and positioned. In this way, multiple components can be fixed and limited to each other, thereby reducing the cost of adhesive tape or assembly jigs, and when heavy work disassembly and assembly is required, it is also convenient for disassembly and separation without generating residual adhesive or increasing disassembly and assembly time. In one embodiment, the frame 20 can be combined with the back plate 10 by a convex buckle 23 of the frame 20 being combined with a notch 13 formed on the back plate 10.

For example, the assembly and combination relationship between the back plate 10, the frame 20, the light guide plate 40 and the at least one optical film 50 is shown in FIG. 5. The frame 20 is arranged on the back plate 10 along the combination direction D1, and the frame 20 has the limiting structure 21; the light guide plate 40 has the mounting structure 41, and the mounting structure 41 is formed with the mounting groove 411. The light guide plate 40 is aligned with the back plate 10 along the combination direction D1. It should be combined with the limiting structure 21 of the frame 20 so that the limiting structure 21 of the frame 20 extends into the mounting groove 411 of the mounting structure 41; the at least one optical film 50 has a mounting portion 51, the at least one optical film 50 is arranged on the light guide plate 40, and the mounting portion 51 is combined with the mounting structure 41. This embodiment mainly provides an assembly structure for mounting the light guide plate 40 on the frame 20. In more detail, the at least one optical film 50 is placed on the light guide plate 40, and the edge of the at least one optical film 50 extends toward the frame 20 to form the mounting portion 51. At the same time, the edge of the light guide plate 40 corresponding to the assembly portion 31 also extends toward the frame 20 to form the mounting structure 41. The mounting structure 41 is coupled to each other along the coupling direction D1, so that the three components of the frame 20, the light guide plate 40 and the at least one optical film 50 can be assembled and positioned. In this way, multiple components can be fixed to each other, thereby reducing the cost of tape or assembly jigs. When heavy work and disassembly are required, it is also convenient for disassembly and separation without generating residual glue or increasing the disassembly and assembly time.

For example, please refer to FIG. 6 and FIG. 7 for the assembly and combination relationship between the back plate 10, the frame 20 and the light strip 60. The backlight module includes the back plate 10, the frame 20 and the light strip 60. The frame 20 has a limiting wall 22 and the limiting structure 21 arranged at intervals, and an accommodating gap 11 is formed between the limiting structure 21 and the limiting wall 22 along a pushing direction D2; the light strip 60 is arranged on the back plate 10 and extends into the accommodating gap 11 along the pushing direction D2, and the limiting structure 21 abuts against the light strip 60 to limit the light strip 60. Since the light strip 60 is limited by the frame 20 and the back plate 10 , the light strip 60 does not need to be fixed by adhesive tape. This embodiment mainly provides a structure for limiting the light strip 60 by the back plate 10 and the frame 20 . In more detail, the frame 20 and the light strip 60 are simultaneously located on a surface of the back panel 10, and the light strip 60 is limited between the limiting wall 22 and the limiting structure 21 of the frame 20. In particular, by moving the light strip 60 along the pushing direction D2 to the accommodating gap 11 between the limiting wall 22 and the limiting structure 21, the three components of the back panel 10, the frame 20 and the light strip 60 are assembled and positioned. In this way, multiple components can be fixed and limited to each other, thereby reducing the cost of tape or assembly jigs. In addition, when heavy disassembly and assembly are required, it is also convenient for disassembly and separation without generating residual glue or increasing the disassembly and assembly time.

Based on the above assembly and combination relationship implementation between different components, the following features can be added according to product requirements.

As shown in FIG6 and FIG7, the light bar 60 extends between the back plate 10 and the limiting wall 22 of the frame 20 along the pushing direction D2, and the light bar 60 is formed with a supporting portion 61, and the limiting structure 21 of the frame 20 abuts against the supporting portion 61 of the light bar 60, so that the light bar 60 is limited in the pushing direction D2. As shown in FIG2, the light bar 60 extends along an extension direction D3, wherein the light bar 60 includes a plurality of light emitting elements 62, and the plurality of light emitting elements 62 are substantially arranged along the extension direction D3 and project light toward the light guide plate 40.

The back plate 10 has a bearing surface 12, and the light bar 60 is arranged on the bearing surface 12. The limiting structure 21 of the frame 20 has a bottom surface 212 and a guide surface 213. There is a gap between the guiding surface 213 and the bearing surface 12 that gradually shrinks along the pushing direction D2. When the top of the abutting portion 61 of the light bar 60 moves along the pushing direction D2 and contacts the guiding surface 213 of the limiting structure 21, the smoothness of pushing the light bar 60 can be improved by the guiding surface 213. The limiting structure 21 will be pushed by the light bar 60 and elastically displaced in a direction opposite to the coupling direction D1. When the top of the abutting portion 61 of the light bar 60 moves along the pushing direction D2 and contacts the guiding surface 213 of the limiting structure 21, the smoothness of pushing the light bar 60 can be improved by the guiding surface 213. After leaving the limiting structure 21 and entering the accommodating gap 11, the limiting structure 21 elastically returns to abut against the bottom surface 212 of the limiting structure 21 and the bearing surface 12 of the back plate 10, and the limiting structure 21 abuts against the side of the abutting portion 61 of the light bar 60 to limit the light bar 60 in the pushing direction D2, or the bottom surface 212 of the limiting structure 212 can abut against the top of the abutting portion 61 of the light bar 60 to press the light bar 60 against the bearing surface 12 of the back plate 10 to limit the light bar 60. In this way, the purpose of surely limiting the light bar 60 between the back plate 10 and the limiting structure 21 of the frame 20 can be achieved.

In addition, as shown in FIG. 5 , since the reflective sheet 30 of the backlight module of the present invention is combined with the limiting structure 21 of the frame 20 through the assembly part 31, and the light guide plate 40 is further combined with the limiting structure 21 of the frame 20 through the installation structure 41, the assembly part 31 of the reflective sheet 30 can achieve the purpose of limiting by the light guide plate 40 and the frame 20, so the reflective sheet 30 and the light guide plate 40 do not need to be fixed by adhesive tape, and since the light strip 60 is independent of the assembly relationship between the reflective sheet 30 and the light guide plate 40, the backlight module can be installed with light-emitting units assembled in different ways according to product requirements.

Preferably, the assembly portion 31 of the reflector 30 is formed with an assembly hole 311, and the limiting structure 21 of the frame 20 is formed with a limiting column 211. The reflector 30 is fixed by inserting the limiting column 211 of the limiting structure 21 of the frame 20 through the assembly hole 311 of the assembly portion 31. The mounting structure 41 of the light guide plate 40 is formed with a mounting groove 411. The limiting column 211 of the limiting structure 21 passes through the assembly hole 311 of the assembly portion 31 and then extends into the mounting groove 411 of the mounting structure 41, thereby improving the assembly stability of the reflector 30, and a concave-convex fit is formed between the limiting structure 21 and the mounting structure 41, which can improve the assembly stability of the light guide plate 40 and improve the effect of limiting the reflector 30. In addition, the limiting column 211 is a polygonal column, the contour of the assembly hole 311 of the assembly part 31 is a polygon corresponding to the limiting column 211, and the inner contour of the mounting groove 411 is also a polygon corresponding to the limiting column 211, so that the accuracy and convenience of installing and aligning the reflector 30 and the light guide plate 40 can be improved.

Furthermore, as shown in FIG. 4, FIG. 5 and FIG. 8, the limiting wall 22 is formed with a slot 221, and the mounting structure 41 of the light guide plate 40 is protruded to form a mounting hook 412. When the mounting structure 41 is correspondingly coupled to the limiting structure 21 of the frame 20 along the coupling direction D1, the mounting hook 412 extends into the slot 221 of the limiting wall 22, so that the light guide plate 40 can be limited by the limiting structure 21 of the frame 20 and the limiting wall 22, and the The end of the mounting hook 412 of the mounting structure 41 extends into the limiting wall 22 along the pushing direction D2, and then protrudes along the combining direction D1 and extends into the slot 221 of the limiting wall 22, thereby preventing the mounting structure 41 from detaching from the limiting wall 22 along the pushing direction D2. In addition, the mounting hook 412 and the mounting slot 411 of the mounting structure 41 are arranged in a straight line in the pushing direction D2, which can further improve the assembly stability of the light guide plate 40.

Furthermore, since the at least one optical film 50 is disposed on the light guide plate 40 and fixed by the mounting portion 51 coupled to the mounting structure 41 , the at least one optical film 50 does not need to be fixed by gluing, which can improve the convenience of assembly and rework. Preferably, the at least one optical film 50 has an opening 501, which is formed on the mounting portion 51, and the mounting structure 41 extends into the opening 501 to fix the at least one optical film 50. Furthermore, before assembling the light guide plate 40, the at least one optical film 50 is mounted on the mounting structure 41 through the opening 501. The mounting hook 412 of the mounting structure 41 will pass through the opening 501 of the at least one optical film 50 and then extend into the slot 221 of the limiting wall 22. Therefore, the at least one optical film 50 is also limited by the mounting hook 412 through the mounting portion 51, thereby improving the assembly stability of the at least one optical film 50. In addition, the reflective sheet 30 can be installed in the backlight module through other assembly methods. For example, the reflective sheet 30 is directly disposed on the back plate 10 and is located between the light guide plate 40 and the back plate 10 to provide a light reflection effect.

In summary, since the various components in the backlight module do not need to be fixed by adhesive tape, and the various components in the backlight module are assembled with the limiting structure 21 of the frame 20 or the mounting structure 41 of the light guide plate 40 through different structures, there is no need to align the components through a fixture to accurately align them, so the convenience of the overall assembly of the backlight module can be improved, the assembly time can be shortened, and the assembly yield can be improved. Moreover, each component can be repeatedly disassembled and assembled, so the reworkability is good. Furthermore, each component in the backlight module has a different assembly relationship, which can be increased or decreased according to product requirements, thereby improving the flexibility of the invention.

Please refer to FIG. 9 , which is a preferred embodiment of the display device of the present invention, comprising a backlight module and a display panel 70 , which is disposed on the backlight module and located on a side of the back plate 10 opposite to the combining direction D1 . The backlight module can project light onto the display panel 70 .

The display device of the present invention is applied with the backlight module. Since the components in the backlight module do not need to be fixed by pasting, the convenience of the overall assembly can be improved, the assembly time can be shortened, and the assembly yield can be improved. In addition, in the backlight module, the frame 20 can include a plurality of the limit structures 21, the light guide plate 40 can include a plurality of the mounting structures 41, the reflective sheet 30 can include a plurality of the assembly parts 31, and the at least one optical film 50 can include a plurality of the installation parts 51, that is, the backlight module can include a plurality of assembly structures to meet the assembly requirements of different products. Preferably, the assembly structure is formed at the corner of the backlight module and is located outside the visible area of the display device to avoid affecting the visual effect.

10: back plate 11: accommodation gap 12: bearing surface 13: notch 20: frame 21: limit structure 211: limit column 212: bottom surface 213: guide surface 22: limit wall 221: slot 23: convex buckle 30: reflector 31: assembly part 311: assembly hole 40: light guide plate 41: mounting structure 411: mounting slot 412: mounting hook 50: optical film 501: opening 51: mounting part 60: light strip 61: abutment part 62: light emitting element 70: display panel D1: coupling direction D2: pushing direction D3: extension direction

Figure 1: A three-dimensional schematic diagram of a preferred embodiment of the backlight module of the present invention. Figure 2: A partial three-dimensional schematic diagram of the backlight module of the present invention. Figure 3: A three-dimensional exploded schematic diagram of the backlight module of the present invention. Figure 4: A top view of the backlight module of the present invention. Figure 5: A cross-sectional schematic diagram of A-A in Figure 4. Figure 6: A schematic diagram of the assembly of the light strip of the backlight module of the present invention. Figure 7: A schematic diagram of the light strip of the backlight module of the present invention after assembly. Figure 8: A schematic diagram of the assembly of the light guide plate of the backlight module of the present invention. Figure 9: A side cross-sectional schematic diagram of a preferred embodiment of the display device of the present invention.

10: Back panel

11: Accommodation gap

12: Loading surface

13: Notch

20: Frame

21: Limiting structure

211: Limiting column

212: Bottom

213: Guiding surface

22: Limiting wall

221: Card slot

23: convex buckle

30: Reflective sheet

31: Assembly Department

311: Assembly hole

40: Light guide plate

41: Installation structure

411: Mounting slot

412: Installation hook

50: Optical film

501: Opening

51: Installation Department

60: Light bar

61: Abutment

D1: Binding direction

D2: Push direction

D3: Extension direction

Claims (9)

A backlight module comprises: a back plate; a frame, the frame is arranged on the back plate along a coupling direction, the frame has a limiting structure; a reflective sheet, the reflective sheet is arranged on the back plate and has an assembly part, the assembly part corresponds to the limiting structure of the frame along the coupling direction; and a light guide plate, the reflective sheet has a mounting structure, the mounting structure corresponds to the limiting structure of the frame along the coupling direction and limits the assembly part to limit the reflective sheet between the back plate and the light guide plate; wherein the frame has a limiting wall, the limiting wall and the limiting structure are arranged at intervals, the limiting wall is formed with a slot, the mounting structure of the light guide plate protrudes to form a mounting hook, when the mounting structure corresponds to the limiting structure of the frame along the coupling direction, the mounting hook extends into the slot of the limiting wall. As described in claim 1, the assembly part of the reflector sheet is formed with an assembly hole, the limiting structure of the frame is formed with a limiting column, the assembly hole of the assembly part of the reflector sheet is sleeved on the limiting column of the limiting structure, the mounting structure of the light guide plate is formed with a mounting groove, and the limiting column extends into the mounting groove. A backlight module as described in claim 1, wherein the backlight module comprises at least one optical film, the at least one optical film has an opening, the at least one optical film is disposed on the light guide plate, and the mounting structure extends into the opening. A backlight module comprises: a back plate; a frame, the frame is arranged on the back plate along a coupling direction, the frame has a limit structure; a light guide plate, the light guide plate has a mounting structure, the mounting structure forms a mounting groove, the light guide plate is correspondingly coupled to the limit structure of the frame along the coupling direction, so that the limit structure of the frame extends into the mounting groove of the mounting structure; and at least one optical film, the at least one optical film has a mounting portion, the at least one optical film is arranged The light guide plate is provided with a mounting portion coupled to the mounting structure; wherein the mounting portion of the at least one optical film is formed with an opening, the frame has a limiting wall, the limiting wall and the limiting structure are arranged at intervals, the limiting wall is formed with a slot, the mounting structure of the light guide plate is protruded to form a mounting hook, when the mounting structure is coupled to the limiting structure of the frame along the coupling direction, the mounting hook passes through the opening of the at least one optical film and extends into the slot of the limiting wall. The backlight module as described in claim 4, wherein the backlight module comprises a reflective sheet, which is disposed on the back plate and between the light guide plate and the back plate. A backlight module comprises: a back plate; a frame, the frame is arranged on the back plate along a combination direction, the frame has a limiting wall and a limiting structure arranged at intervals, and a receiving gap is formed between the limiting structure and the limiting wall along a pushing direction; and a light bar, the light bar is arranged on the back plate and extends into the receiving gap along the pushing direction, the limiting structure abuts against the light bar to limit the light bar; wherein the light bar extends between the limiting wall of the back plate and the frame along the pushing direction, the light bar is formed with a supporting part, the limiting structure of the frame abuts against the supporting part of the light bar, so that the light bar is limited in the pushing direction. As described in claim 6, the back panel has a bearing surface, the light strip is arranged on the bearing surface, the limiting structure of the frame has a bottom surface and a guide surface, the bottom surface of the limiting structure abuts against the bearing surface of the back panel, and there is a gap between the guide surface and the bearing surface that gradually shrinks along the pushing direction. A backlight module as described in claim 6 or 7, wherein the backlight module comprises a reflective sheet, a light guide plate and at least one optical film sheet, the reflective sheet is located on the back plate and combined with the limiting structure of the frame, the light guide plate is located on the reflective sheet and combined with the limiting structure of the frame to limit the reflective sheet, and the at least one optical film sheet is combined with the light guide plate. A display device, comprising: a backlight module as described in any one of claims 1 to 8; and a display panel, which is disposed on the backlight module and located on a side of the backplane opposite to the combining direction.

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