Backlight module and display device
By adding a buffer component to the backlight module, the problem of collision and expansion between the light-emitting functional layer and the surrounding structure is solved, thus achieving protection of the display device and improvement of image quality.
Patent Information
- Application Number
- CN202520144313.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-21
AI Technical Summary
During the transportation and use of display devices, the light-emitting functional layer is prone to collisions and expansion with the surrounding structure, resulting in damage and loss of image quality.
A first buffer is added between the back panel and the light-emitting functional layer, and/or a second buffer is added between the mounting frame and the light-emitting functional layer, using these buffers to absorb the impact caused by collision and thermal expansion.
It effectively buffers the luminescent functional layer from impacts during transportation and thermal expansion during use, preventing damage and improving image quality.
Smart Images
Figure CN223842541U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of display technology, and in particular to a backlight module and display device. Background Technology
[0002] Typically, display devices such as televisions and monitors mainly consist of a display module and a backlight module. The display module is used to display images, while the backlight module provides a light source for the display module.
[0003] With the continuous advancement of display technology, the thickness of display devices has been gradually reduced. To achieve this reduction, the space between the light-emitting functional layer and its surrounding structure in the backlight module has been minimized. During transportation, if the journey is bumpy, the light-emitting functional layer and its surrounding structure may collide, potentially damaging the optical material layers inside the backlight module.
[0004] In addition, during the use of the display device, the light-emitting functional layer in the backlight module generates heat, which causes the internal temperature of the backlight module to rise. This leads to the thermal expansion of the light-emitting functional layer, and the deformation caused by the expansion can cause the light-emitting functional layer to collide with its surrounding structure, thereby affecting the display quality. Utility Model Content
[0005] The purpose of this utility model embodiment is to provide a backlight module and display device to improve the problems of damage caused by collisions between the light-emitting functional layer and surrounding structures, as well as image quality degradation. The specific technical solution is as follows:
[0006] This utility model provides a backlight module, which includes: a back plate, a light-emitting functional layer, and a mounting frame;
[0007] The back panel includes a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall together forming an accommodating space;
[0008] The light-emitting functional layer is disposed within the accommodating space;
[0009] The mounting frame is located at the top of the edge of the light-emitting functional layer and is used to cooperate with the side wall of the back plate to fix the light-emitting functional layer.
[0010] A first buffer is provided between the side of the edge of the light-emitting functional layer and the side wall of the back plate; and / or, a second buffer is provided at the connection between the mounting frame and the top of the edge of the light-emitting functional layer.
[0011] In some embodiments of this utility model, the light-emitting functional layer includes: a light-emitting layer, a diffuser plate, and a backing film material arranged sequentially away from the bottom wall;
[0012] The first buffer is disposed between the side wall of the back plate and the side of the edge of the diffuser plate;
[0013] The second buffer is disposed between the top edge of the back panel membrane and the mounting frame.
[0014] In some embodiments of this utility model, a plurality of positioning hooks are provided on the inner side of the back plate sidewall;
[0015] The back panel membrane material has a positioning through hole at the positioning hook, and the positioning hook passes through the positioning through hole.
[0016] The light-emitting layer and the diffuser plate have gaps between their sides facing the back plate sidewall and the positioning hooks;
[0017] The first buffer is disposed in the gap between the positioning lug and the diffuser plate.
[0018] In some embodiments of this utility model, the light-emitting layer includes: a lamp board and a reflective paper located on the side of the lamp board away from the bottom wall of the back plate, with the lamp beads on the lamp board passing through the reflective paper toward the diffuser plate.
[0019] In some embodiments of this utility model, the first buffer is a silicone pad;
[0020] The silicone pad is fixed to the positioning hook by adhesive.
[0021] In some embodiments of this utility model, the Shore hardness of the silicone pad is 30-50 degrees.
[0022] In some embodiments of this utility model, the second buffer is a foam strip; the foam strip is fixed to the side of the mounting frame near the back panel membrane by adhesive.
[0023] In some embodiments of this utility model, the Shore hardness of the foam strip is 20-40 degrees.
[0024] In some embodiments of this utility model, the foam strip is arranged as a continuous whole or as multiple segments spaced apart.
[0025] In some embodiments of this utility model, the mounting frame is provided with a mounting slot on its side, and the back plate is provided with a mounting buckle on its side wall; for fixing the mounting frame to the back plate.
[0026] This utility model also provides a display device, including the backlight module described in any of the above embodiments.
[0027] Beneficial effects:
[0028] This utility model provides a backlight module and display device, which uses a back plate and a mounting frame to fix the light-emitting functional layer. Simultaneously, a first buffer is added between the back plate and the light-emitting functional layer, and / or a second buffer is added between the mounting frame and the light-emitting functional layer. When a collision occurs during transportation or when the light-emitting functional layer expands due to heat during use, the first and second buffers can effectively absorb the impact, thereby improving the problem of damage to the light-emitting functional layer caused by collisions and image quality degradation.
[0029] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0031] Figure 1 This is an exploded view of the backlight module provided in this application;
[0032] Figure 2 for Figure 1 The front view of the backlight module shown;
[0033] Figure 3 for Figure 1 A magnified view of the area at position M1 in the middle;
[0034] Figure 4 for Figure 2 A cross-sectional view of the backlight module at point AA;
[0035] Figure 5 for Figure 1 The diagram shows the positional relationship between the backplate film, backplate, positioning hooks and first buffer in the backlight module.
[0036] Figure 6 for Figure 1 The diagram shows the positional relationship between the positioning hook, the first buffer, and the diffuser in the backlight module.
[0037] Figure 7 for Figure 6 The diagram shows the positional relationships from another perspective;
[0038] Figure 8 for Figure 1 A schematic diagram showing the distribution of the first buffer component on the backplate in the backlight module shown.
[0039] Figure 9for Figure 8 A partial enlarged view of the first buffer component when it is fixed to the back plate;
[0040] Figure 10 for Figure 2 Cross-sectional view of the backlight module at point BB shown;
[0041] Figure 11 for Figure 2 Cross-sectional view of the backlight module shown at the CC position;
[0042] Figure 12 for Figure 1 A schematic diagram showing the distribution of the second buffer component on the mounting frame in the backlight module;
[0043] Figure 13 for Figure 12 Side view of the backlight module shown at position M2;
[0044] Figure 14 for Figure 12 A magnified view of the area at position M3 in the middle;
[0045] Figure 15 for Figure 2 Cross-sectional view of the backlight module at the DD section shown;
[0046] Figure 16 for Figure 1 A bottom view of the light-emitting layer in the backlight module shown;
[0047] Figure 17 for Figure 1 Top view of the light-emitting layer in the backlight module shown;
[0048] Figure 18 for Figure 16 The diagram shows the structure of the lamp panel in the light-emitting layer.
[0049] Figure 19 for Figure 16 The diagram shows the structure of the reflective paper in the light-emitting layer.
[0050] Figure 20 for Figure 1 The diagram shows the structure of the backlight module in which the backplate and the mounting frame are fixedly connected by mounting clips and mounting slots.
[0051] Figure label:
[0052] Back panel 1, bottom wall 11, side wall 12, positioning hook 121, mounting buckle 13;
[0053] 2. Light-emitting functional layer, 21. Light-emitting layer, 211 lamp board, 2111 lamp bead, 212 reflective paper, 22 diffuser plate, 23 backing film, 231 positioning through hole;
[0054] Install the plastic frame 3 and the mounting slot 31;
[0055] First buffer 41, second buffer 42. Detailed Implementation
[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on this application are within the protection scope of the present utility model.
[0057] This utility model provides a backlight module, such as Figure 1 and Figure 2 As shown, Figure 1 This is an exploded view of the backlight module provided in this application; Figure 2 for Figure 1 The backlight module shown is a front view. The backlight module includes: a backplate 1, a light-emitting functional layer 2, and a mounting frame 3; the backplate 1 includes a bottom wall 11 and a side wall 12 connected to the bottom wall 11, the bottom wall 11 and the side wall 12 together forming an accommodating space; the light-emitting functional layer 2 is disposed within the accommodating space; the mounting frame 3 is disposed at the top edge of the light-emitting functional layer 2, for cooperating with the side wall 12 of the backplate 1 to fix the light-emitting functional layer 2; a first buffer 41 is disposed between the side edge of the light-emitting functional layer 2 and the side wall of the backplate 1; and / or, a second buffer 42 is disposed at the connection between the mounting frame 3 and the top edge of the light-emitting functional layer 2.
[0058] In this embodiment, the back plate 1 and the mounting frame 3 are used to fix the light-emitting functional layer 2. Simultaneously, a first buffer 41 is added between the back plate 1 and the light-emitting functional layer 2, and / or a second buffer 42 is added between the mounting frame 3 and the light-emitting functional layer 2. When a collision occurs during transportation or when the light-emitting functional layer 2 expands due to heat during use, the first buffer 41 and the second buffer 42 can effectively absorb the impact, thereby improving the damage to the light-emitting functional layer 2 caused by collisions and the resulting image quality degradation.
[0059] In some embodiments of this utility model, such as Figure 1 As shown, the light-emitting functional layer 2 includes: a light-emitting layer 21, a diffuser plate 22 and a back plate film 23 arranged sequentially away from the bottom wall 11; a first buffer 41 is disposed between the side wall 12 of the back plate 1 and the side of the edge of the diffuser plate 22; and a second buffer 42 is disposed between the top of the edge of the back plate film 23 and the mounting frame 3.
[0060] In this embodiment, the light-emitting layer 21 in the light-emitting functional layer 2 emits light toward the diffuser plate 22 and the back sheet film 23. The diffuser plate 22 and the back sheet film 23 modulate the incident light, and the modulated light is emitted from the back sheet film 23, making the light more uniform.
[0061] When a collision tendency arises between the diffuser plate 22 and the side wall 12 of the back plate 1, the presence of the first buffer 41 causes the diffuser plate 22 to collide with the first buffer 41 preferentially. The first buffer 41 can absorb the impact of the collision, thereby improving the damage caused by the collision of the light-emitting functional layer 2 and the problem of image quality degradation.
[0062] A second buffer 42 is provided between the back panel film 23 and the mounting frame 3 to buffer the collision between them. At the same time, the friction of the second buffer 42 can effectively limit the deformation of the back panel film 23 along the extension direction of the second buffer 42, thereby improving the problem of arching caused by thermal expansion of the display functional layer 2 during use.
[0063] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, Figure 3 for Figure 1 A magnified view of the area at position M1 in the middle; Figure 4 for Figure 2 The diagram shows a cross-sectional view of the backlight module at point AA. Multiple positioning lugs 121 are provided on the inner side of the sidewall 12 of the backplate 1; the backplate film 23 has positioning through holes 231 at the positioning lugs 121, through which the positioning lugs 121 pass. Figures 5 to 7 As shown, Figure 5 for Figure 1 The diagram shows the positional relationship between the backplate film, backplate, positioning hooks and first buffer in the backlight module. Figure 6 for Figure 1 The diagram shows the positional relationship between the positioning hook, the first buffer, and the diffuser in the backlight module. Figure 7 for Figure 6 The diagram shows the positional relationship from another perspective. The light-emitting layer 21 and the diffuser plate 22 have gaps between their sides facing the side wall 12 of the back plate 1 and the positioning ear 121; the first buffer 41 is disposed in the gap between the positioning ear 121 and the diffuser plate 22.
[0064] In this embodiment, see Figure 3 and Figure 4The positioning lugs 121 provided on the backplate 1 can position the light-emitting functional layer 2 and restrict its movement along the horizontal plane. In the light-emitting functional layer 2, the backplate film 23 is provided with positioning through holes 231. During installation, the positioning through holes 231 are fitted onto the positioning lugs 121 of the backplate 1, thereby realizing the installation and positioning of the backplate film 23.
[0065] Also see Figure 6 and Figure 7 A first buffer 41 is provided in the gap between the diffuser plate 22 and the positioning ear 121. When there is a tendency for the diffuser plate 22 to collide with the positioning ear 121, the presence of the first buffer 41 causes the diffuser plate 22 to collide with the first buffer 41 first. The first buffer 41 can absorb the impact of the collision, thereby improving the damage caused by the collision of the light-emitting functional layer 2 and the problem of image quality degradation.
[0066] In some embodiments of this utility model, such as Figure 8 and Figure 9 As shown, Figure 8 for Figure 1 A schematic diagram showing the distribution of the first buffer component on the backplate in the backlight module shown. Figure 9 for Figure 8 A partial enlarged view of the first buffer component 41 fixed to the back plate. The first buffer component 41 is a silicone pad; the silicone pad is fixed to the positioning lug 121 by adhesive.
[0067] In this embodiment, the hardness of the silicone pad can be 30-50 degrees (Shore A hardness standard). For example, a KE951 silicone pad with a hardness of 45 degrees can be selected, using a single-sided adhesive of model VHB_3M4920, and fixed to the positioning hook 121. See Figure 8 Four first buffers 41 can be respectively disposed on both sides of the back plate 1 to buffer the lateral movement of the diffuser plate 22. This embodiment does not limit the material of the silicone pad; in actual use, the material of the silicone pad can be selected according to actual needs.
[0068] The dimensions of the first buffer 41 are set based on the dimensions between the diffuser plate 22 and the positioning ear 121. For example, when the distance between the diffuser plate 22 and the positioning ear 121 is 2.5mm, the width of the first buffer 41 can be set to 2.0mm, and the gap between the first buffer 41 and the positioning ear 121 can be set to 0.5mm. When the thickness of the diffuser plate is 2.8mm, the thickness of the first buffer 41 can be set to 2.3mm, and the gap between the first buffer 41 and the backing membrane 23 can be set to 0.5mm. When the length of the positioning ear is 14mm, the length of the first buffer 41 can be set to the same 14mm as the positioning ear.
[0069] In actual use, the selection of silicone pad material, size and distribution of the first buffer 41 can be adjusted according to actual needs. For example, the first buffer 41 can be set at the positioning lug 121 on each side wall 12 of the back plate 1, as long as it can buffer the collision of the diffuser plate 22.
[0070] In some embodiments of this utility model, such as Figure 10 and Figure 11 As shown, Figure 10 for Figure 2 Cross-sectional view of the backlight module at point BB shown; Figure 11 for Figure 2 The diagram shows a cross-sectional view of the backlight module at the CC position. The second buffer 42 is a foam strip; the foam strip is fixed to the mounting frame 3 near the backplate membrane 23 by adhesive. The foam strip can be arranged as a continuous whole or in multiple intermittent segments.
[0071] In this embodiment, the hardness of the foam strip can be between 20 and 40 degrees (the hardness standard is Shore A). For example, liquid polysulfide rubber (PSR) foam with a hardness of 30 degrees can be used as the material for the foam strip. The coefficient of friction of PSR foam is 0.35. The foam strip is bonded to the mounting frame 3 using single-sided adhesive of model JM610Y. This embodiment does not limit the material of the foam strip; in actual use, the material of the foam strip can be selected according to actual needs.
[0072] like Figures 12 to 14 As shown, Figure 12 for Figure 1 A schematic diagram showing the distribution of the second buffer component on the mounting frame in the backlight module; Figure 13 for Figure 12 Side view of the backlight module shown at position M2; Figure 14 for Figure 12 A magnified view of the area at position M3. PSR foam can be distributed around the mounting frame 3, and is tightly fitted to the backing membrane 23 via the mounting frame 3. When the backing membrane 23 tends to collide with the mounting frame 3 in the vertical direction, the backing membrane 23 preferentially collides with the second buffer 42. The second buffer 42 can cushion the impact generated by the collision with the backing membrane 23.
[0073] Meanwhile, since the second buffer 42 is closely attached to the back sheet membrane 23, the second buffer 42 restricts the deformation of the back sheet membrane 23 along the extension direction of the second buffer 42 through friction, making it difficult for the back sheet membrane 23 to move in the horizontal direction or to arch.
[0074] In some embodiments of this utility model, see Figure 15 , Figure 15 for Figure 2 The diagram shows a cross-sectional view of the backlight module at the DD position. By simultaneously incorporating a first buffer 41 and a second buffer 42 into the backlight module, the effects of both embodiments described above can be achieved.
[0075] In some implementations of this application, such as Figure 16 and Figure 17 As shown, Figure 16 for Figure 1 A bottom view of the light-emitting layer in the backlight module shown; Figure 17 for Figure 1 The diagram shows a top view of the light-emitting layer in the backlight module. The light-emitting layer 21 includes a lamp panel 211 and a reflective paper 212 located on the side of the lamp panel 211 away from the bottom wall 11 of the back panel 1. The LED beads 2111 on the lamp panel 211 pass through the reflective paper 212 toward the diffuser plate.
[0076] In this embodiment, the light-emitting layer 21 includes a lamp panel 211 and a reflective paper 212. See also... Figure 18 and Figure 19 , Figure 18 for Figure 16 The diagram shows the structure of the lamp panel in the light-emitting layer. Figure 19 for Figure 16 The diagram shows the structure of the reflective paper in the light-emitting layer. Lamp beads 2111, passing through the reflective paper 212 on the lamp plate 211, are used to emit light. Since some of the light emitted by the lamp beads 2111 towards the diffuser plate 22 is reflected back towards the lamp plate 211 after passing through the diffuser plate 22 and the backing film 23, the light reflected towards the lamp plate 211 changes direction under the action of the reflective paper 212 and is emitted again towards the diffuser plate 22 and the backing film 23, thus improving the light-gathering ability.
[0077] In some implementations of this application, see [link to relevant documentation]. Figure 20 , Figure 20 for Figure 1 The diagram shows the structure of the backlight module in which the backplate and the mounting frame are fixedly connected by mounting clips and mounting slots. The mounting frame 3 has a mounting slot 31 on its side, and the backplate 1 has a mounting clip 13 on its side wall 12; these are used to fix the mounting frame 3 and the backplate 1 in place.
[0078] In this embodiment, the mounting frame 3 and the back plate 1 are fixedly connected by mounting buckles 13 and mounting slots 31.
[0079] This application also provides a display device, including the backlight module described in any of the above embodiments.
[0080] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.
Claims
1. A backlight module, characterized in that, include: Back panel, light-emitting functional layer, and mounting frame; The back panel includes a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall together forming an accommodating space; The light-emitting functional layer is disposed within the accommodating space; The mounting frame is located at the top of the edge of the light-emitting functional layer and is used to cooperate with the side wall of the back plate to fix the light-emitting functional layer. A first buffer is provided between the side of the edge of the light-emitting functional layer and the side wall of the back plate; and / or, a second buffer is provided at the connection between the mounting frame and the top of the edge of the light-emitting functional layer.
2. The backlight module according to claim 1, characterized in that, The light-emitting functional layer includes: a light-emitting layer, a diffuser plate, and a backing film material arranged sequentially away from the bottom wall; The first buffer is disposed between the side wall of the back plate and the side of the edge of the diffuser plate; The second buffer is disposed between the top edge of the back panel membrane and the mounting frame.
3. The backlight module according to claim 2, characterized in that, Multiple positioning hooks are provided on the inner side of the back plate sidewall; The back panel membrane material has a positioning through hole at the positioning hook, and the positioning hook passes through the positioning through hole. The light-emitting layer and the diffuser plate have gaps between their sides facing the back plate sidewall and the positioning hooks; The first buffer is disposed in the gap between the positioning lug and the diffuser plate.
4. The backlight module according to claim 3, characterized in that, The light-emitting layer includes: a lamp panel and a reflective paper located on the side of the lamp panel away from the bottom wall of the back panel, with the lamp beads on the lamp panel passing through the reflective paper toward the diffuser plate.
5. The backlight module according to claim 3 or 4, characterized in that, The first buffer is a silicone pad; The silicone pad is fixed to the positioning hook by adhesive.
6. The backlight module according to claim 5, characterized in that, The silicone pad has a Shore hardness of 30-50 degrees.
7. The backlight module according to claim 2, characterized in that, The second cushioning component is a foam strip; the foam strip is fixed to the side of the mounting frame near the back panel membrane by adhesive.
8. The backlight module according to claim 7, characterized in that, The Shore hardness of the foam strip is 20-40 degrees.
9. The backlight module according to claim 7, characterized in that, The foam strips are either arranged in a continuous strip or in multiple spaced segments.
10. The backlight module according to claim 1, characterized in that, The mounting frame has a mounting slot on its side, and the back plate has a mounting buckle on its side wall; these are used to fix the mounting frame to the back plate.
11. A display device, characterized in that, Includes the backlight module according to any one of claims 1 to 10.