Backlight module, display module, and display apparatus

Abstract

The present application relates to the technical field of display apparatuses, and discloses a backlight module, a display module, and a display apparatus. The backlight module comprises: a back plate, the back plate comprising a bottom plate and a plurality of side plates connected to the bottom plate, and the plurality of side plates being sequentially connected end-to-end to form an accommodating space; and a light bar, a light guide plate, and an adapter member, which are located in the accommodating space. The adapter member comprises a first adapter plate, and the first adapter plate is located between the light guide plate and the bottom plate. The light guide plate is fixed to the side of the first adapter plate facing away from the bottom plate. The light bar is located between the light guide plate and a side plate, and is fixedly connected to the first adapter plate. The backlight module disclosed in the present application is capable of reducing fluctuations in the display brightness of the display module and improving the uniformity of display brightness.

Description

Backlight module, display module and display device

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411216830.8, filed on August 30, 2024, entitled "Backlight Module, Display Module and Display Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of display device technology, and in particular to a backlight module, a display module, and a display device. Background Technology

[0004] With the rapid development of the Internet of Things (IoT), LCD displays have been introduced in many outdoor or semi-outdoor environments such as gas stations, subway stations, and airports. These special environments place higher demands on display devices. For example, in situations with high ambient light levels, such as direct or oblique sunlight, current display devices typically employ a dual-sided LED strip edge-lit design to ensure brightness in order to improve the display effect.

[0005] The dual-sided LED strip light-incident design typically involves fixing the LED strip to the backplate, with sufficient expansion space between the LED strip and the light guide plate to ensure adequate expansion of the light guide plate. Limiting the movement of the light guide plate usually involves using rubber strips at the four corners of the backplate or bending the non-LED strip layer of the backplate. However, due to manufacturing tolerances of the backplate and light guide plate, the initial design gap between the light guide plate and the LED strip fluctuates between different production batches, resulting in significant differences in display brightness between different batches. Furthermore, when using rubber strips to limit the light guide plate, the light guide plate, when placed vertically, experiences compression due to its own weight or vibration, causing changes in the gap between the light guide plate and the LED strip, which also leads to significant fluctuations in the brightness uniformity of the display device. Summary of the Invention

[0006] This application provides a backlight module, a display module, and a display device for reducing the fluctuation of display brightness and improving the uniformity of display brightness.

[0007] In a first aspect, this application provides a backlight module, comprising:

[0008] The back panel includes a bottom plate and multiple side plates connected to the bottom plate, the multiple side plates being connected end to end in sequence to form an accommodating space;

[0009] The light strip, light guide plate, and adapter are located within the accommodating space;

[0010] The adapter includes a first adapter plate, which is located between the light guide plate and the base plate;

[0011] The light guide plate is fixed to the side of the first adapter plate opposite to the base plate;

[0012] The light strip is located between the light guide plate and the side plate, and the light strip is fixedly connected to the first adapter plate.

[0013] The backlight module provided in this application uses an adapter within the backplate. This adapter includes a first adapter plate, to which both the LED strip and the light guide plate are fixedly connected. This ensures that the LED strip and the light guide plate are relatively fixed, preventing relative displacement. When the light guide plate moves within the backplate, the gap between the light guide plate and the LED strip remains constant, significantly reducing fluctuations in the gap and improving the uniformity of display brightness. Furthermore, the displayed image remains stable, enhancing the display effect. In addition, compared to traditional backlight modules where the LED strip is fixed to the backplate, the LED strip and light guide plate in this application are both fixed to the first adapter. This avoids fluctuations in the initial design gap between the light guide plate and the LED strip due to manufacturing tolerances from different batches, further improving the uniformity of display brightness.

[0014] In some possible implementations, a first connector is also included, which includes a first connecting portion and a second connecting portion that are connected to each other. The first connecting portion is located between the first adapter portion and the base plate, and the second connecting portion is located between the light strip and the side plate.

[0015] The first adapter plate is fixed to the side of the first connecting part away from the base plate;

[0016] The light strip is fixed to the side of the second connecting part facing the light guide plate.

[0017] In some possible implementations, a resilient clip is also included for clamping the first adapter plate and the first connecting portion;

[0018] The elastic clip includes a first clip and a second clip disposed opposite to each other, and a third clip connecting the first clip and the second clip. The first clip is located on the side of the first adapter plate away from the base plate, the second clip is located on the side of the first connecting portion close to the base plate, and the third clip is located between the first clip and the second clip.

[0019] In some possible implementations, the first clip and the second clip are made of thin metal, and / or the thickness of the first clip and the second clip is 0.15 mm to 0.25 mm.

[0020] In some possible implementations, the first adapter plate is provided with a first hole, the first connecting part is provided with a first post, the first post passes through the first hole, the size of the first hole along a first direction is the same as the size of the first hole along a second direction, the first direction is the length direction of the light strip, and the second direction is the arrangement direction of the light strip and the light guide plate.

[0021] In some possible implementations, along the first direction, the first adapter plate is provided with at least one second hole on each side of the first hole, and the first connecting part is also provided with a second post corresponding to each of the second holes, the second post passing through the corresponding second hole;

[0022] The dimension of the second hole along the first direction is greater than the dimension of the first hole along the first direction, and the dimension of the second hole along the first direction is the same as the dimension of the first hole along the first direction.

[0023] In some possible implementations, the first connector is made of metal.

[0024] In some possible implementations, the adapter further includes a second adapter plate connected to the first adapter plate, the second adapter plate being located between the side plate and the light strip, and connected to the side of the first adapter plate facing the side plate;

[0025] The light strip is fixed to the side of the second adapter plate facing the light guide plate.

[0026] In some possible implementations, the second adapter plate is made of metal.

[0027] In some possible implementations, a heat dissipation clip is also included, the heat dissipation clip including a first heat dissipation plate located between the light strip and the second adapter plate, the first heat dissipation plate being fixed to the light strip.

[0028] In some possible implementations, the heat dissipation clip further includes a second heat dissipation plate connected to the first heat dissipation plate, the second heat dissipation plate being fixed to the side of the second adapter plate opposite to the base plate; or

[0029] The heat dissipation clip further includes a second heat dissipation plate and a third heat dissipation plate. The second heat dissipation plate is connected between the first heat dissipation plate and the third heat dissipation plate. The second heat dissipation plate is fixed to the side of the second adapter plate opposite to the base plate, and the third heat dissipation plate is fixed to the side of the second adapter plate opposite to the light strip; or

[0030] The heat dissipation clip also includes a second heat dissipation plate, a third heat dissipation plate, and a fourth heat dissipation plate connected in sequence. The second heat dissipation plate is connected to the first heat dissipation plate and fixed to the side of the second adapter plate away from the base plate. The third heat dissipation plate is fixed to the side of the second adapter plate away from the light strip. The fourth heat dissipation plate is fixed to the base plate, and there is a gap between the fourth heat dissipation plate and the side plate.

[0031] In some possible implementations, the adapter further includes a first limiting structure connected to the first adapter plate, the first limiting structure being located on the side of the second adapter plate facing the side plate, and the bottom plate having a second limiting structure, the first limiting structure and the second limiting structure cooperating to limit the bottom plate and the adapter;

[0032] When the heat dissipation clip includes a third heat dissipation plate, the heat dissipation plate is provided with a clearance groove for avoiding the first limiting structure and the second limiting structure.

[0033] In some possible implementations, the adapter includes a first connector connected to the first adapter plate, and the light strip includes a second connector located on the side away from the light guide plate, wherein the first connector and the second connector are engaged.

[0034] In some possible implementations, the light strip includes a carrier plate and a connecting plate connected to each other, the carrier plate being located between the light guide plate and the side plate, the connecting plate being located between the light guide plate and the base plate, and the first adapter plate and the connecting plate being an integrally formed structure.

[0035] In some possible implementations, the light strip includes a carrier plate and a connecting plate connected to each other, the carrier plate being located between the light guide plate and the side plate, the connecting plate being located between the light guide plate and the base plate, and the first adapter plate being located on the side of the connecting plate opposite to the base plate.

[0036] In some possible implementations, the first adapter plate has a recessed platform on the side facing the connecting plate, the connecting plate has a clearance groove, and the recessed platform is located in the clearance groove.

[0037] In some possible implementations, the adapter further includes at least one protrusion connected to the first adapter plate, the protrusion being located between the side plate and the light strip, and the side of the protrusion facing the side plate having a first groove;

[0038] The base plate is provided with a third column, which passes through the first groove.

[0039] In some possible implementations, the adapter further includes a second adapter plate connected to the first adapter plate, the second adapter plate being located between the light strip and the side plate;

[0040] The protrusion is fixed to the side of the second adapter plate facing the side plate; or

[0041] The protrusion is fixed to the side of the first adapter plate facing the side plate, and the second adapter plate is provided with a clearance structure for avoiding the protrusion.

[0042] In some possible implementations, the base plate is provided with a fourth post, the first adapter plate is provided with a third hole, the dimension of the third hole along the second direction is larger than the dimension of the third hole along the first direction, and the fourth post passes through the third hole;

[0043] Wherein, the first direction is the length direction of the light strip, and the second direction is the arrangement direction of the light strip and the light guide plate.

[0044] In some possible implementations, the ratio of the coefficient of thermal expansion of the first adapter plate to that of the light guide plate is 0.9 to 1.1.

[0045] In some possible implementations, the back panel includes a first side panel and a second side panel connected to each other, wherein the light strip is provided between the first side panel and the light guide plate, and no light strip is provided between the second side panel and the light guide plate;

[0046] The second side plate has a second groove along a third direction, and at least one limiting part is provided between the second groove and the light guide plate;

[0047] The light guide plate has at least two first protrusions on the side facing the second side plate. The at least two first protrusions are arranged along the second direction. A third groove is formed between two adjacent first protrusions. The limiting part passes through the third groove.

[0048] Wherein, the second direction is the arrangement direction of the light guide plate and the light strip, and the third direction is the thickness direction of the light guide plate.

[0049] In some possible implementations, the opening direction of the second groove is not parallel to the opening direction of the third groove.

[0050] In some possible implementations, the limiting portion has a first surface on the side away from the base plate, and the light guide plate has a first plate surface on the side away from the base plate. The dimension between the first plate surface and the base plate in a third direction is less than or equal to the dimension between the first plate surface and the base plate in a third direction.

[0051] In some possible implementations, an optical film is also included, the optical film being located on the side of the light guide plate opposite to the base plate;

[0052] The at least one limiting portion includes a first limiting portion, the first limiting portion having a fourth groove along the third direction, the fourth groove having a hanging ear rib, the optical film including a second protrusion having a hanging ear hole, the second protrusion being located within the fourth groove, and the hanging ear rib passing through the hanging ear hole; and / or

[0053] The at least one limiting part includes a second limiting part, the second limiting part having a fifth groove along the third direction, and the optical film including a third protrusion located in the fifth groove.

[0054] In some possible implementations, an adhesive layer is also included, located between the light guide plate and the first adapter plate, wherein the light guide plate is fixed to the side of the first adapter plate opposite to the base plate by the adhesive layer.

[0055] In some possible implementations, a reflective sheet is also included, the reflective sheet being located between the light guide plate and the base plate;

[0056] The adhesive layer includes a first adhesive portion and a second adhesive portion located interconnected. The first adhesive portion bonds the reflective sheet, and the second adhesive portion bonds the light guide plate. The second adhesive portion is located between the first adhesive portion and the light strip. The orthographic projection of the first adhesive portion on the side plate at least partially overlaps with the orthographic projection of the second adhesive portion on the side plate. The dimension of the first adhesive portion in a third direction is smaller than the dimension of the second adhesive portion in the third direction; or...

[0057] The adhesive layer includes a first adhesive portion and a second adhesive portion located interconnected. The first adhesive portion is located on the side of the first adapter away from the base plate. The reflective sheet is bonded to the first adhesive portion. The second adhesive portion is located on the side of the first adhesive portion opposite to the first adapter. The light guide plate is bonded to the second adhesive portion. The orthographic projection of the first adhesive portion on the base plate and the orthographic projection of the second adhesive portion on the base plate at least partially overlap. The dimension of the first adhesive layer in the second direction is larger than the dimension of the second adhesive layer in the second direction.

[0058] Wherein, the second direction is the arrangement direction of the light guide plate and the light strip, and the third direction is the thickness direction of the light guide plate.

[0059] In some possible implementations, the light strip includes a carrier plate, a plurality of LED beads, and at least one limiting block, wherein the LED beads and the limiting block are fixed to the side of the carrier plate facing the light guide plate, the plurality of LED beads are spaced apart, and the limiting block is located between adjacent LED beads;

[0060] The height of the limiting block protruding from the carrier plate is greater than the height of the lamp bead protruding from the carrier plate, and the light guide plate abuts against the limiting block.

[0061] In some possible implementations, the light strip further includes a connector fixed to the side of the carrier plate facing the light guide plate;

[0062] The connector has a socket, and the base plate has an opening directly opposite the socket;

[0063] The plane containing the socket is the end face, the plane containing the outer surface of the base plate is the outer surface plane, the light guide plate has a second plate surface on the side facing the base plate, and the end face is located between the outer surface plane and the second plate surface;

[0064] The distance between the end face and the second plate surface in the third direction is less than or equal to the distance between the outer surface plane and the second plate surface in the third direction;

[0065] Wherein, the third direction refers to the thickness direction of the light guide plate.

[0066] In a second aspect, this application provides a display module, including a backlight module as described in any possible embodiment of the first aspect.

[0067] Thirdly, this application provides a display device including a display module as described in the second aspect. Attached Figure Description

[0068] Figure 1 is an exploded structural diagram of a backlight module in this application;

[0069] Figure 2 is a schematic diagram of a structure for assembling the adapter, light strip and light guide plate in this application;

[0070] Figure 3 is a schematic diagram of a structure for connecting the light strip and the adapter in this application;

[0071] Figure 4 is a schematic diagram of a structure for assembling the adapter, light strip and first connector in this application;

[0072] Figure 5 is another structural schematic diagram of the assembly of the adapter, light strip and first connector in this application;

[0073] Figure 6 is another structural schematic diagram of the assembly of the adapter, light strip and first connector in this application;

[0074] Figure 7 is a cross-sectional view of the backlight module in this application;

[0075] Figure 8 is another cross-sectional view of the backlight module in this application;

[0076] Figure 9 is another cross-sectional view of the backlight module in this application;

[0077] Figure 10 is a structural schematic diagram of the first adapter plate and the first connector in this application;

[0078] Figure 11 is an enlarged schematic diagram of the structure at point A in Figure 10;

[0079] Figure 12 is a schematic diagram of one structure of the elastic clip in this application;

[0080] Figure 13 is an enlarged schematic diagram of the structure at point B in Figure 10;

[0081] Figure 14 is an enlarged schematic diagram of the structure at point C in Figure 10;

[0082] Figure 15 is a schematic diagram of a structure for limiting the position between the first adapter and the back plate in this application;

[0083] Figure 16 is a top view of the structure shown in Figure 15;

[0084] Figure 17 is a schematic diagram of another structure for limiting the position between the first adapter and the back plate in this application;

[0085] Figure 18 is another cross-sectional view of the backlight module in this application;

[0086] Figure 19 is a top view of the adapter shown in Figure 18;

[0087] Figures 20a-20d are schematic diagrams of different structures for setting heat dissipation clips in the backlight module;

[0088] Figure 21 is a schematic diagram of one structure of the heat dissipation clip in Figure 20d;

[0089] Figure 22 is a partial structural schematic diagram of the heat sink clip in Figure 21;

[0090] Figure 23 is a schematic diagram of an overall structure of the back plate in this application;

[0091] Figure 24 is an enlarged schematic diagram of the structure at point D in Figure 23;

[0092] Figure 25 is a schematic diagram of an overall structure of the light guide plate in this application;

[0093] Figure 26 is a schematic diagram of a structure for assembling the light guide plate and the back plate in this application;

[0094] Figure 27 is an enlarged schematic diagram of the structure at point E in Figure 26;

[0095] Figure 28 is a schematic diagram of an overall structure of the optical film in this application;

[0096] Figure 29 is an enlarged schematic diagram of the structure at point F in Figure 28;

[0097] Figure 30 is an enlarged schematic diagram of the structure at point G in Figure 26;

[0098] Figure 31 is a schematic diagram of an assembly structure of the optical film and the backplate in this application;

[0099] Figure 32 is an enlarged schematic diagram of the structure at point H in Figure 31;

[0100] Figure 33 is an enlarged schematic diagram of the structure at point J in Figure 31;

[0101] Figure 34 is a schematic diagram of an overall structure of the light strip in this application;

[0102] Figure 35 is a schematic diagram of a structure after the light strip and light guide plate are assembled in this application;

[0103] Figure 36 is a schematic diagram of a structure on the back of the base plate facing the light strip connector in this application;

[0104] Figure 37 is a schematic diagram of another overall structure of the light strip in this application;

[0105] Figure 38 is a schematic diagram of a structure for assembling the first adapter plate with the light strip in Figure 37;

[0106] Figure 39 is a schematic diagram of a structure for assembling a light strip and a light guide plate in this application;

[0107] Figure 40 is a schematic diagram of one corner of the backlight module in this application.

[0108] In the diagram: 100 - Back plate; 110 - Bottom plate; 110a - Outer surface; 111 - Third post; 112 - Fourth post; 113 - Opening; 120 - Side plate; 120a - First side plate; 120b - Second side plate; 121 - Second groove; 130 - Limiting part; 130a - First limiting part; 130b - Second limiting part; 1301 - First surface; 1311 - Fourth groove; 1312 - Hanging lug; 1313 - Fifth groove ; 200-LED strip; 201-Second connector; 210-Carrier plate; 220-LED chip; 230-Limiting block; 240-Connector; 241-Socket; 250-Connecting plate; 251-Allowing groove; 300-Light guide plate; 300a-First surface; 301-First clearance surface; 302-Second clearance surface; 310-First boss; 320-Third groove; 400-Adapter; 401-First connector; 410 - First adapter plate; 411- Adhesive layer; 4111- First adhesive part; 4112- Second adhesive part; 413- First hole; 414- Second hole; 415- Protrusion; 416- First groove; 417- Third hole; 418- Countersunk platform; 420- Second adapter plate; 500- First connector; 510- First connecting part; 511- First post; 512- Second post; 520- Second connecting part; 521- Clearance hole; 600 - Reflective sheet; 700 - Elastic clip; 710 - First clip; 720 - Second clip; 730 - Third clip; 800 - Optical film; 810 - Second boss; 820 - Hanging ear hole; 830 - Third boss; 900 - Heat dissipation clip; 910 - First heat dissipation plate; 920 - Second heat dissipation plate; 930 - Third heat dissipation plate; 940 - Fourth heat dissipation plate; 950 - First clearance groove; 1000 - L-shaped rubber strip. Detailed Implementation

[0109] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0110] Referring to Figure 1, the display module in this application may include a back panel 100, a light strip 200, a light guide plate 300, and an adapter 400. The back panel 100 includes a base plate 110 and a plurality of side plates 120 connected to the base plate 110. The plurality of side plates 120 are connected end to end in sequence to cooperate with the base plate 110 to form an accommodating space. The aforementioned light strip 200, light guide plate 300, and adapter 400 are all disposed within the accommodating space.

[0111] The base plate 110 in this application can be a square structure, and the number of side plates 120 is four. Furthermore, the display module in this application can be applied to a single-light-strip 200 side-incident design or a double-light-strip 200 side-incident design. When applied to a double-light-strip 200 side-incident design, the two light strips 200 are respectively positioned close to a set of two opposing side plates 120, the light guide plate 300 is located between the two light strips 200, and the number of adapters 400 is the same as the number of light strips 200. To facilitate a detailed description of the display module scheme in this application, the following embodiments describe one side of the light strip 200 and its related structure. In addition, in the following embodiments, the length direction of the light strip 200 is defined as the first direction, i.e., the X direction; the arrangement direction of the light strip 200 and the light guide plate 300 is defined as the second direction, i.e., the Y direction; and the thickness direction of the light guide plate 300 is defined as the third direction, i.e., the Z direction.

[0112] Referring to Figures 1 and 2 together, the adapter 400 may include a first adapter plate 410, which is located between the light guide plate 300 and the base plate 110. The light guide plate 300 and the lamp strip 200 are both fixed to the side of the first adapter plate 410 away from the base plate 110.

[0113] Understandably, the display module in this application, by setting a first adapter plate 410, fixes both the light guide plate 300 and the lamp strip 200 onto the first adapter plate 410, ensuring a relatively fixed relationship between the light guide plate 300 and the lamp strip 200. When the light guide plate 300 moves relative to the back plate 100, the gap between the light guide plate 300 and the lamp strip 200 does not fluctuate, thereby reducing the fluctuation of the display brightness of the display module and improving the brightness uniformity of the display module. In addition, compared with the technical solution in the display module of the reference group that fixes the lamp strip 200 to the back plate 100, this application fixes the lamp strip 200 to the first adapter plate 410. This avoids fluctuations in the design gap between the light guide plate 300 and the lamp strip 200 caused by the manufacturing tolerances of the back plate 100 and the light guide plate 300 in different production batches, thereby improving the brightness uniformity of the display module.

[0114] Referring to Figure 3, the adapter 400 may further include a first connector 401 connected to the first adapter plate 410, and the light strip 200 includes a second connector 201 connected to the side of the light strip 200 facing away from the light guide plate 300. The first connector 401 and the second connector 201 are engaged with each other. In this case, the first adapter plate 410 and the light strip 200 are relatively fixed together by the first connector 401 and the second connector 201, thereby improving the fixing effect between the first adapter plate 410 and the light strip 200. For example, the first connector 401 may be a slot provided in the first adapter plate 410, with the opening of the slot facing the side plate 120, and the second connector 201 may be a T-shaped plug fixed to the light strip 200, with the T-shaped plug engaging in the slot, thereby fixing the light strip 200 to the first adapter plate 410.

[0115] In some embodiments, referring to FIG4, the display module of this application further includes a first connector 500, which may include a first connecting portion 510. The first connecting portion 510 is located between the first adapter plate 410 and the base plate 110, and the first adapter plate 410 is connected to the first connecting portion 510. In this application, the first connecting portion 510 can be used to support the overall structure of the first adapter plate 410, the light guide plate 300, and the light strip 200, so as to make the overall structure more stable. Furthermore, the thickness of the first connecting portion 510 can be adjusted to meet the height requirements of the light guide plate 300.

[0116] The side of the first connecting portion 510 facing the side plate 120 can be flush with the side of the first adapter plate 410 facing the side plate 120, or the side of the first connecting portion 510 facing the side plate 120 can protrude beyond the side of the first adapter plate 410 facing the side plate 120. As shown in the foregoing embodiments and FIG. 3, when the first adapter plate 410 and the light strip 200 are fixed by the first connector 401 and the second connector 201, the first adapter plate 410 can be fixed to the first connecting portion 510, and the first connector 401 can be disposed at the part of the first connecting portion 510 that protrudes from the first adapter plate 410 and is located on the side of the first connecting portion 510 away from the bottom plate 110. The second connector 201 is fixed to the side of the light strip 200 away from the light guide plate 300. When the first connector 401 and the second connector 201 are engaged, the first adapter plate 410, the first connecting part 510, the light guide plate 300 and the light strip 200 can form a relatively fixed integral structure.

[0117] In some embodiments, referring to FIG5, the backlight module of this application further includes a first connector 500, which may include a second connector 520, the second connector 520 being fixed to the side of the lamp strip 200 facing away from the light guide plate 300. Since the second connector 520 is relatively fixed to the lamp strip 200, the structural strength of the lamp strip 200 can be improved, thereby enhancing the fixing effect between the lamp strip 200 and the first adapter plate 410. It is worth noting that a certain gap is maintained between the second connector 520 and the side plate 120 to allow for an expansion gap when the light guide plate 300 expands.

[0118] In this application, the surface of the second connecting portion 520 facing the base plate 110 can contact the surface of the base plate 110. In this case, the second connecting portion 520 can be made of a material with good thermal conductivity; for example, the material of the second connecting portion 520 is metal. When the light strip 200 generates heat, the heat can be transferred to the second connecting portion 520, and then from the second connecting portion 520 to the base plate 110, thereby improving the heat dissipation effect of the light strip 200.

[0119] In some embodiments, referring to FIG6, the backlight module of this application further includes a first connector 500, which includes a first connecting portion 510 and a second connecting portion 520. The first connecting portion 510 is fixedly connected to the second connecting portion 520, and the first connecting portion 510 is perpendicular to the second connecting portion 520. In this case, the first connector 500 has an overall L-shaped structure. The first connecting portion 510 is located between the first adapter plate 410 and the base plate 110. The first adapter plate 410 is connected to the side of the first adapter portion facing away from the base plate 110. The light strip 200 can also be glued to the side of the second connecting portion 520 facing the light guide plate 300.

[0120] The first connecting part 510 and the second connecting part 520 can be an integral structure to ensure the overall structural stability of the first connecting member 500. Thus, when both the light strip 200 and the first adapter plate 410 are mounted on the first connecting member 500, the first adapter plate 400 not only provides support for the light strip 200, the first adapter plate 410, and the light guide plate 300, thereby improving the structural stability between them, but also enhances the relative fixation effect between the light strip 200 and the light guide plate 300.

[0121] In this application, the first connector 500 can be made of metal, and the LED strip 200 can be attached to the second connector 520 using thermally conductive adhesive. In this case, the first connector 500 has good thermal conductivity; the heat generated by the LED strip 200 can first be transferred to the second connector 520, then from the second connector 520 to the first connector 510, and finally from the first connector 510 to the base plate 110, ultimately dissipating the heat outside the backplate 100. Because the contact area between the second connector 520 and the base plate 110 is large, by making the first connector 500 also a heat sink, the heat dissipation efficiency of the backlight module can be improved, which helps to reduce the temperature of the backplate 100.

[0122] Furthermore, referring to Figure 7, the first adapter plate 410 has an adhesive layer 411 on the side opposite to the base plate 110, and the light guide plate 300 is bonded to the adhesive layer 411 so that the light guide plate 300 is fixed relative to the first adapter plate 410.

[0123] Specifically, the end face of the adhesive layer 411 near the light strip 200 can be flush with the end face of the light guide plate 300 near the light strip, and the end face of the adhesive layer 411 away from the light strip 200 can be flush with the end face of the first adapter plate 410 away from the light strip 200. This increases the bonding area between the adhesive layer 411 and the light guide plate 300, thereby further improving the bonding effect.

[0124] Based on this, referring to Figure 8, the backlight module also includes a reflective sheet 600, which is located between the light guide plate 300 and the base plate 110. The reflective sheet 600 is fixed to the side of the first adapter plate 410 facing away from the base plate 110. Thus, by fixing the light strip 200, reflective sheet 600, and light guide plate 300 to the first adapter plate 410, the light strip 200, reflective sheet 600, light guide plate 300, and first adapter plate 410 can form a single integrated component, thereby improving the structural stability of the component.

[0125] As an optional implementation, as shown in FIG8, the adhesive layer 411 may include a first adhesive portion 4111 and a second adhesive portion 4112 arranged along the Z direction, wherein the first adhesive portion 4111 is located between the second adhesive portion 4112 and the first adapter plate 410. The orthographic projection of the first adhesive portion 4111 on the base plate 110 at least partially overlaps with the orthographic projection of the second adhesive portion 4112 on the base plate 110, and along the Y direction, the width of the first adhesive portion 4111 is greater than the width of the second adhesive portion 4112. In this case, when the reflective sheet 600 and the light guide plate 300 are respectively fixed to the first adapter plate 410, the reflective sheet 600 is adhered to the first adhesive portion 4111, and the light guide plate 300 is adhered to the second adhesive portion 4112.

[0126] The thickness of the first adhesive portion 4111 can be the same as the thickness of the reflective sheet 600. When the reflective sheet 600 is pasted onto the first adhesive portion 4111, the two sides of the reflective sheet 600 can be respectively attached to the first adhesive portion 4111 and the light guide plate 300, so that the light guide plate 300 and the first adhesive portion 4111 cooperate to limit the reflective sheet 600 in the Z direction.

[0127] The thickness of the first adhesive layer 411 can be designed according to the actual product usage requirements. For example, when it is determined that the thickness of the second adhesive layer 412 is the same as the thickness of the reflector 600, the thickness of the first adhesive layer 411 can be designed so that after the light guide plate 300 is pasted on the second adhesive layer 412, the light guide plate 300 can be directly aligned with the lamp beads 220 on the lamp strip 200.

[0128] Alternatively, as another optional implementation, referring to FIG9, the adhesive layer 411 may include a first adhesive portion 4111 and a second adhesive portion 4112 arranged along the Y direction, with the second adhesive portion 4112 located between the first adhesive portion 4111 and the light strip 300. The orthographic projection of the first adhesive portion 4111 on the side plate 120 at least partially overlaps with the orthographic projection of the second adhesive portion 4112 on the side plate 120, and the dimension of the first adhesive portion 4111 in the Z direction is smaller than the dimension of the second adhesive portion 4112 in the Z direction. When the light guide plate 300 and the reflector are fixed to the first adapter plate 410 through the adhesive layer 411, the reflector 600 is bonded to the first adhesive portion 4111, and the light guide plate 300 is bonded to the second adhesive portion 4112.

[0129] Furthermore, since the display module in this application can be used in outdoor or semi-outdoor environments, the temperature environment in which the display module is located varies greatly. Under such circumstances, the light guide plate 300 will inevitably undergo thermal expansion and contraction due to temperature changes. To prevent the light guide plate 300 from shifting relative to the first adapter plate 410 during expansion, thus deteriorating the adhesion between the light guide plate 300 and the second adhesive layer 412, the expansion coefficient of the first adapter plate 410 can be made similar to that of the light guide plate 300. In this way, when the light guide plate 300 expands or contracts, the first adapter plate 410 can deform synchronously with the light guide plate 300, thereby improving the adhesion between the light guide plate 300 and the second adhesive layer 412.

[0130] Specifically, the ratio of the coefficient of thermal expansion of the first adapter plate 410 to that of the light guide plate 300 can be 0.9 to 1.1, thereby ensuring that the first adapter plate 410 can expand or contract synchronously with the light guide plate 300. For example, the material of the first adapter plate 410 can be similar to that of the light guide plate 300. If the material of the light guide plate 300 is PC plastic, then the material of the first adapter plate 410 can be PC plastic, PVC, etc.

[0131] Furthermore, referring to Figure 10, which only shows a portion of the structure of the first connector 500 in the X direction and does not represent the entire first connector 500, the backlight module in this application also includes an elastic clip 700, which can be used to simultaneously clamp the first adapter plate 410 and the first connecting portion 510, thereby limiting the first adapter plate 410 and the first connecting portion 510 in the Z direction and preventing the first adapter plate 410 from deforming relative to the first connecting portion 510.

[0132] Specifically, referring to Figures 11 and 12, the elastic clip 700 may include a first clip 710 and a second clip 720 opposite to each other, and a third clip 730 connected between the first clip 710 and the second clip 720. In this case, the elastic clip 700 has an overall U-shaped structure. The first clip 710 is located on the side of the first adapter plate 410 facing away from the first connecting portion 510, and the second clip 720 is located on the side of the first connecting portion 510 facing the base plate 110, and can be in contact with the surface of the first connecting portion 510 facing the base plate 110. Under the clamping action of the first clip 710 and the second clip 720, the first adapter plate 410 and the first connecting portion 510 are fixed in the Z direction, thereby effectively preventing the first adapter plate 410 from tilting relative to the first connecting portion 510, and also not affecting the free expansion of the first adapter plate 410 along the X direction on the first connecting portion 510.

[0133] The width of the first adapter plate 410 along the Y direction can be the same as the width of the first connecting portion 510 along the Y direction. That is, the side of the first adapter plate 410 facing away from the side plate 120 is flush with the side of the first connecting portion 510 facing away from the side plate 120. The third clamping piece 730 can also be attached to the surface of the first adapter plate 410 and the side of the first connecting portion 510 facing away from the side plate 120 to further limit the first adapter plate 410 and the first connecting portion 510 in the Y direction, thereby ensuring the stability of the structure between the first adapter plate 410 and the first connecting portion 510.

[0134] As an optional implementation, both the first clip 710 and the second clip 720 can be made of thin metal. For example, the first clip 710 and the second clip 720 can be made of stainless steel. The thickness of the first clip 710 and the second clip 720 can be 0.15mm to 0.25mm. For example, the thickness of the first clip 710 and the second clip 720 can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, or 0.25mm, thereby ensuring that the elastic clip 700 is both strong and elastic.

[0135] In this application, the elastic clip 700 can be one, two, or more. For example, when there is one elastic clip 700, it can be disposed at the end of the first adapter plate 410. When there are two elastic clips 700, they can be disposed at the two ends of the first adapter plate 410 along the X direction. When there are multiple elastic clips 700, they can be distributed at intervals along the X direction at different locations of the first adapter plate 410. As shown in FIG10, since an adhesive layer 411 is provided for fixing the light guide plate 300, there is a certain distance between the light guide plate 300 and the first adapter plate 410. When the elastic clip 700 is clamped on the side surface of the first adapter plate 410 facing the light guide plate 300, since the thickness of the first clip 710 is small, the elastic clip 700 will not come into contact with the light guide plate 300, thereby interfering with the light guide plate 300. In other words, the elastic clip 700 in this application is located on the side of the light guide plate 300 facing the base plate 110. In addition, when multiple elastic clips 700 are provided, the adhesive layer 411 can also be designed in a segmented manner in the X direction to ensure that there is a gap between two adjacent adhesive layers 411, so as to facilitate the installation of the elastic clips 700.

[0136] It is worth noting that, not only as shown in Figure 11, the first adapter plate 410 and the first connecting part 510 are clamped together by the elastic clip 700 to limit their movement in the Z direction, but also as shown in Figure 4, when the first connector 500 includes only the first connecting part 510, the first connecting part 510 and the first adapter plate 410 can be clamped together by the elastic clip 700.

[0137] As mentioned above, the material of the first connector 500 can be metal, so as to serve as a heat dissipation component. When the first adapter 400 is connected to the first connector 500, in order to facilitate the thermal expansion and contraction of the first adapter 400 relative to the first connector 500, a corresponding limiting structure and positioning structure can also be provided between the first adapter 400 and the first connector 500 to limit the expansion gap between the first adapter 400 and the first connector 500.

[0138] In some embodiments, referring to Figures 10 and 13 together, a first hole 413 is provided at the center of the first adapter plate 410 along the X direction, and the first hole 413 penetrates the first adapter plate 410 along the Z direction. Correspondingly, a first post 511 protruding from the surface of the first adapter plate 410 is provided on the side of the first connecting portion 510 facing the first adapter plate 410, and the first post 511 passes through the first hole 413. In the initial state, the first post 511 and the first hole 413 can be coaxially arranged, and the distance between the first post 511 and the first hole 413 in the X and Y directions is the same. For example, the gap between the inner wall of the first post 511 and the first hole 413 in the X and Y directions is 0.1 mm to 0.15 mm, so as to achieve precise positioning between the first post 511 and the first hole 413.

[0139] Furthermore, referring to Figures 10, 13, and 14, along the X-direction, the first adapter 400 may also have second holes 414 on both sides of the first hole 413, with the second holes 414 penetrating the first adapter plate 410 along the Z-direction. The first connecting portion 510 has second posts 512 corresponding one-to-one with the second holes 414, each second post 512 passing through the second hole 414. The diameter of the second post 512 is the same as the diameter of the first post 511. The size of the second hole 414 in the X-direction is larger than the size of the first hole 413 in the X-direction, and the size of the second hole 414 in the Y-direction is the same as the size of the first hole 413 in the Y-direction, thereby positioning the second posts 512 and the second holes 414 in the Y-direction.

[0140] As an optional implementation, the first hole in this application can be a circular hole, and the second hole can be a racetrack-shaped hole. In this case, the length S1 of the second hole 414 along the X direction can be calculated based on the length L1 of the distance between the second hole 414 and the first hole 413 set by the first adapter 400, so as to ensure the expansion gap of the first adapter plate 410. In a specific implementation, S1 can satisfy the following formula: S1≥(L1*expansion coefficient of the first adapter plate 410*temperature difference Δt+0.3mm)*2, where the temperature difference Δt is the absolute value of (the extreme temperature during product operation or storage -25℃).

[0141] The second holes 414 on both sides of the first hole 413 can be arranged symmetrically with the first hole 413 as the center, so as to facilitate the calculation of the length S1 of each second hole 414. Furthermore, the number of second holes 414 on each side of the first hole 413 can be designed according to actual needs, that is, there can be one, two, three, etc., second holes 414 on each side of the first hole 413.

[0142] As mentioned above, the adhesive layer 411 can be segmented. When the first hole 413 and multiple second holes 414 are provided, to avoid interference between the first post 511 and the second post 512 and the adhesive layer 411 provided on the first adapter plate 410, the adhesive layer 411 can also avoid the first hole 413 and the second hole 414 when it is segmented. In this way, the first adapter 400 and the first connecting part 510 can be well limited, and the fixing effect between the reflector 600 and the first adapter 400 can also be guaranteed.

[0143] In some embodiments, referring to Figures 15 and 16, the first adapter plate 410 has at least one protrusion 415 on the side facing the side plate 120, the protrusion 415 being located on the side of the light strip 200 facing the side plate 120. When two or more protrusions 415 are provided, the protrusions 415 are spaced apart along the X direction. The side of the protrusion 415 facing the side plate 120 has a first groove 416, the opening of the first groove 416 facing the side plate 120. Correspondingly, the base plate 110 has a third post 111, the third post 111 passing through the first groove 416, to limit the back plate 100 and the assembly through the third post 111 and the first groove 416.

[0144] Correspondingly, the second connecting part 520 is provided with a clearance hole 521 for avoiding the protrusion 415, so that the protrusion 415 can extend out from the clearance hole 521 and thus engage with the third post 111 provided on the base plate 110.

[0145] In this application, taking the setting of a protrusion 415 as an example, the protrusion 415 is located in the middle of the first adapter plate 410 in the X direction. In the initial state of the backlight module, the third pillar 111 can be located in the middle of the first groove 416 in the X direction. At this time, in the Y direction, the gap S2 between the third pillar 111 and the inner wall of the first groove 416 near the first adapter plate 410 can satisfy: S2≥(Y direction length of light guide plate 300*expansion coefficient of light guide plate 300*temperature difference Δt+0.3mm) / 2, where the temperature difference Δt is the absolute value of (the extreme temperature during product operation or storage -25℃). Through the above design, when the backlight module is designed with dual light strips 200, the sum of S2 on both sides can meet the expansion requirements of the light guide plate 300 in the Y direction.

[0146] Alternatively, to limit the expansion gap between the first adapter plate 410 and the back plate 100 in the Y direction, in some embodiments, referring to FIG17, the first adapter plate 410 is provided with a third hole 417. The third hole 417 is located in the middle of the first adapter plate 410 in the X direction and extends through the first adapter plate 410 in the Z direction. The first connecting portion 510 is also provided with a corresponding clearance hole (not shown in the figure) opposite to the third hole 417. The shape of the clearance hole is the same as that of the third hole 417. Correspondingly, the base plate 110 is provided with a fourth post 112, which passes through the clearance hole and the third hole 417.

[0147] The third hole 417 can be, for example, a racetrack-shaped hole. In this case, the major axis of the third hole 417 extends along the Y direction, meaning that the dimension of the third hole 417 along the Y direction is larger than its dimension along the X direction. When the backlight module is in its initial state, the fourth pillar 112 is located at the center of the third hole 417 along the Y direction. Along the Y direction, the gap S3 between the fourth pillar 112 and one sidewall of the third hole 417 can satisfy: S3 ≥ (Y-direction length of light guide plate 300 * expansion coefficient of light guide plate 300 * temperature difference Δt + 0.3mm) / 2, where the temperature difference Δt is the absolute value of (the extreme temperature during product operation or storage -25℃). Through the above design, adding the S3 values ​​from both sides satisfies the expansion requirements of the light guide plate 300 in the Y direction for reliable operation.

[0148] It is worth noting that in the aforementioned embodiments, as shown in Figure 17, both the first hole 413 and the third hole 417 are provided in the middle of the first adapter plate 410. In actual implementation, their positions do not conflict. The middle of the first adapter plate 410 can be understood as all the areas included in the middle after extending a certain distance to both sides along the X direction with the center of the first adapter plate 410 as the center of symmetry. Therefore, when the first hole 413 and the second hole 417 are provided, their positions are not necessarily at the absolute center of the first adapter plate 410.

[0149] In some embodiments, referring to FIG18, the adapter 400 includes a first adapter plate 410 and a second adapter plate 420. The second adapter plate 420 is connected to the side of the first adapter plate 410 facing the back plate 100, and is located between the light strip 200 and the side plate 120. The light guide plate 300 is bonded to the side of the first adapter plate 410 away from the bottom plate 110 via an adhesive layer 411, and the light strip 200 is fixed to the side of the second adapter plate 420 facing the light guide plate 300.

[0150] As an optional implementation, the first adapter plate 410 and the second adapter plate 420 can be designed as a single unit. In this way, the adapter 400 not only provides fixed support for the light guide plate 300 and the LED strip 200, but also facilitates the improvement of the internal stability of the backlight module. Alternatively, as another optional implementation, the second adapter 400 can be made of metal, and the LED strip 200 can be fixed to the second adapter 400. The heat generated by the LED strip 200 can be transferred to the base plate 110 through the second adapter 400, thereby achieving a good heat dissipation effect.

[0151] Referring to Figures 18 and 19 in this application, the first adapter plate 410 has at least one protrusion 415 on the side facing the side plate 120. The protrusion 415 has a first groove 416 on the side facing the side plate 120, and the bottom plate 110 has a third post 111 passing through the first groove 416. Specifically, the protrusion 415 can be fixed to the side of the second adapter plate 420 facing the side plate 120, meaning that the protrusion 415 protrudes from the surface of the second adapter plate 420. Furthermore, there is a certain gap between the protrusion 415 and the side plate 120 to provide an expansion gap for the light guide plate 300.

[0152] Regarding the positional relationship between the third column 111 and the first groove 416 in Figure 19, please refer to the content described in the previous embodiment regarding the third column 111 and the first groove 416 in Figure 16. Therefore, it will not be repeated here.

[0153] Alternatively, as another implementation, the protrusion 415 can be directly connected to the side of the first adapter plate 410 facing the back plate 120. In this case, the second adapter plate 420 is provided with a clearance structure for avoiding the protrusion 415, which is similar to the structure shown in FIG. 16. In addition, the side of the protrusion 415 facing the back plate 120 can be flush with the side of the second adapter plate 420 facing the back plate, or the side of the protrusion 415 facing the back plate 120 can also protrude from the surface of the side of the second adapter plate 420 facing the back plate.

[0154] Furthermore, in this application, the adapter 400 can also be limited between the first adapter 400 and the back plate 100 by providing a third hole 417 in the middle of the first adapter 400 as described in the foregoing embodiments and FIG. 17, and by having a fourth post 112 provided on the base plate 110 pass through the third hole 417. The positional relationship between the third hole 417 and the fourth post 112 can also be referred to the description in the foregoing embodiments, and will not be repeated here.

[0155] It is worth noting that, apart from the specific form of the adapter 400 and the connection relationship between the adapter 400 and the light strip 200, which are different from those in the previous embodiments, the other structures, such as the connection between the light guide plate 300 and the reflector 600, are the same as those in the previous embodiments, so they will not be described again here.

[0156] Furthermore, in this application, referring to Figures 20a to 20d, in order to improve the heat dissipation effect of the backlight module, a heat dissipation clip 900 is also provided, which can be used to dissipate heat from the light strip 200.

[0157] Specifically, as one implementation scheme, referring to Figure 20a, the heat dissipation clip 900 includes a first heat dissipation plate 910, which is located between the light strip 200 and the second adapter plate 420. Exemplarily, the opposite sides of the first heat dissipation plate 910 can be fixed to the light strip 200 and the second adapter plate 420 respectively by adhesive, thereby securing the first heat dissipation plate 910. The heat generated by the light strip 200 during operation can be transferred to the first heat dissipation plate 910 to reduce the temperature of the light strip 200 and ensure stable operation of the light strip 200.

[0158] As another implementation, referring to FIG20b, the heat sink 900 includes a first heat sink 910 and a second heat sink 920. The first heat sink 910 is located between the light strip 200 and the second adapter plate 420, and the second heat sink 920 is located on the side of the second adapter plate 420 facing away from the base plate 110. The first heat sink 910 and the second heat sink 920 are connected to each other. Exemplarily, they can be an integral structure to improve the overall structural stability of the heat sink 900.

[0159] The first heat sink 910 can be glued to the LED strip 200 and the second adapter plate 420 on opposite sides, and the second heat sink 920 can also be glued to the second adapter plate 420, thus forming a relatively fixed integral structure with the heat sink 900, LED strip 200, and second adapter plate 420. The heat generated by the LED strip 200 is transferred to the first heat sink 910, and then from the first heat sink 910 to the second heat sink 920. This increases the heat dissipation area of ​​the heat sink 900, thereby improving heat dissipation efficiency.

[0160] As another implementation, referring to FIG20c, the heat dissipation clip 900 includes a first heat dissipation plate 910, a second heat dissipation plate 920, and a third heat dissipation plate 930 connected in sequence. The third heat dissipation plate 910 is located between the light strip 200 and the second adapter plate 420, the second heat dissipation plate 920 is located on the side of the second adapter plate 420 facing away from the base plate 110, and the third heat dissipation plate 930 is located on the side of the second adapter plate 420 facing the side plate 120. Exemplarily, the opposite sides of the first heat dissipation plate 910 can be respectively fixed to the light strip 200 and the second adapter plate 420 by adhesive. The second heat dissipation plate 920 can also be fixed to the side of the second adapter plate 420 facing away from the base plate 110 by adhesive, and the third heat dissipation plate 930 can also be fixed to the side of the second adapter plate 420 facing the side plate 120 by adhesive. Furthermore, there is a certain gap between the third heat dissipation plate 930 and the side plate 120 to provide an expansion gap for the light guide plate 300.

[0161] Alternatively, the first heat sink 910, the second heat sink 920, and the third heat sink 930 can also be a single integrated structure. Since the heat sink 900 has a U-shaped overall structure, and can be made of an elastic material, it can be clamped onto the second adapter plate 420, thus fixing the heat sink 900 to the second adapter plate 420. In this case, the LED strip 200 can be fixed to the first heat sink 910 with thermally conductive adhesive, thereby achieving effective heat conduction.

[0162] In addition, the end of the third heat sink 930 away from the second heat sink 920 can also contact the base plate 110. While setting the third heat sink 930 to increase the heat dissipation area, the third heat sink 930 can also make thermal contact with the base plate 110, thereby dissipating heat out of the backlight module through the base plate 110 to improve heat dissipation efficiency.

[0163] As another implementation scheme, referring to Figures 20d and 21, the heat dissipation clip 900 includes a first heat dissipation plate 910, a second heat dissipation plate 920, a third heat dissipation plate 930, and a fourth heat dissipation plate 940. The first heat dissipation plate 910 and the third heat dissipation plate 930 face each other, and the second heat dissipation plate 920 is connected between the first heat dissipation plate 910 and the third heat dissipation plate 930 to form a U-shaped structure. The first heat dissipation plate 910, the second heat dissipation plate 920, the third heat dissipation plate 930, and the fourth heat dissipation plate 940 can be an integral structure. The formed U-shaped structure is clamped to the second adapter plate 420 from the side facing away from the base plate 110 to ensure that the heat dissipation clip 900 is relatively fixed to the second adapter plate 420.

[0164] Specifically, the first heat sink 910 is located between the LED strip 200 and the second adapter plate 420. The second heat sink 920 is located on the side of the second adapter plate 420 away from the base plate 110. The third heat sink 930 is located on the side of the second adapter plate 420 away from the LED strip 200. The fourth heat sink 940 is connected to the side of the third heat sink 930 away from the second heat sink 920 and can be attached to the base plate 110. The LED strip 200 can be attached to the first heat sink 910 with thermally conductive adhesive. At this time, the heat generated by the LED strip 200 can be transferred sequentially from the first heat sink 910 to the third heat sink 930, the third heat sink 930, and the fourth heat sink 940, and finally the heat is transferred away from the base plate 110. Because the fourth heat sink 940 is attached to the base plate 120, the contact area between the fourth heat sink 940 and the base plate 110 can be increased, thereby improving the heat dissipation effect.

[0165] Alternatively, the two opposite sides of the first heat sink 910 can be fixed to the lamp strip 200 and the second adapter plate 420 respectively by adhesive. The second heat sink 920 and the third heat sink 930 can also be fixed to the second adapter plate 420 by adhesive. A certain gap is left between the fourth heat sink 940 and the side plate 120 to provide an expansion gap for the light guide plate 300.

[0166] In Figures 20a to 20d, the first heat sink 910, the second heat sink 920, the third heat sink 930, and the fourth heat sink 940 can all be made of metal to ensure good heat dissipation.

[0167] In this application, the adapter 400 may further include a first limiting structure (not shown in the figure) connected to the first adapter plate 410. The first limiting structure is located on the side of the second adapter plate 420 opposite to the light strip 200. The base plate 110 is provided with a second limiting structure (not shown in the figure). The first limiting structure and the second limiting structure cooperate with each other to limit the distance between the first adapter plate 410 and the base plate 110. The first limiting structure may be, for example, a protrusion 415 and a first groove 416 as shown in FIG. 19, and the second limiting structure may be, for example, a third post 111 as shown in FIG. 19. Since the first limiting structure protrudes from the side surface of the second adapter plate 420 away from the light strip 200, in order to facilitate the fixed connection between the third heat sink 930 and the second adapter plate 420, referring to Figure 22, the third heat sink 930 is provided with a relief groove 950 for avoiding the first limiting structure and the second limiting structure, so that the first limiting structure and the second limiting structure can protrude from the surface of the third heat sink 930 without affecting the limiting effect between the first adapter plate 410 and the base plate 110.

[0168] It is worth noting that the structure of any of the heat dissipation clips 900 shown in Figures 20a to 20d can be applied not only to the backlight module shown in Figure 18, but also to the structure of the heat dissipation clips 900 when the backlight module has the structure shown in Figure 5 or Figure 6, in order to dissipate heat from the light strip 200.

[0169] In the reference design, when the backlight module is subjected to mechanical vibration, the light guide plate will displace in both the X and Y directions due to the compression of the rubber strip or the large amount of movement in the Y direction of the bending edge limit, which can easily cause scratches and defects. Therefore, in the backlight module of this application, after the first adapter 400, first connector 500, light guide plate 300, lamp strip 200, and reflector 600 are assembled to form a component, a limiting structure can be set to limit the component and prevent large displacement of the component within the backplate 100.

[0170] As described in the previous embodiments, a first groove 416 is provided in the first adapter plate 410, and the component and the back plate 100 are limited by the third post 111 passing through the first groove 416. Referring back to Figure 16, when the backlight module is in the initial state, the third post 111 is located in the middle of the first groove 416 along the X direction. At this time, there is a certain gap between the third post 111 and the two opposite sidewalls of the first groove 416 arranged along the X direction. For example, the gap between the third post 111 and the sidewall of the first groove 416 is 0.1mm to 0.15mm, thereby limiting the movement of the component relative to the back plate 100 in the X direction to only 0.1mm to 0.15mm.

[0171] As an optional implementation scheme, referring to Figures 23 to 27, when limiting the component and the backplate 100 in the Y direction, the backplate 100 includes a first side plate 120a and a second side plate 120b. A light strip 200 is provided between the first side plate 120a and the light guide plate 300, while no light strip 200 is provided between the second side plate 120b and the light guide plate 300. The second side plate 120b has a second groove 121 along a third direction. At least one limiting portion 130 is provided between the second groove 121 and the light guide plate 300. The light guide plate 300 has at least two first protrusions 310 on the side facing the second side plate 120b. These at least two first protrusions 310 are arranged along the Y direction, and a third groove 320 is formed between any two adjacent first protrusions 310. In this application, the example of a limiting portion 130 between the second groove 121 and the light guide plate 300, and two first protrusions 310 on the light guide plate 300, will be used for explanation.

[0172] The opening of the second groove 121 is not parallel to the opening of the third groove 320. Specifically, the opening of the second groove 121 is located on the side of the second side plate 120b away from the bottom plate 110, and the opening of the third groove 320 is located on the side of the first boss 310 facing the second side plate 120b. The limiting part 130 passes through the third groove 320 to achieve the limiting function between the light guide plate 300 and the second side plate 120b.

[0173] When the backlight module is in the initial state, referring to FIG27, in the Y direction, the gap d1 between the side wall of the third groove 320 and the limiting part 130 can be 0.1mm to 0.15mm, thereby limiting the amount of movement of the component relative to the back plate 100 in the Y direction to only 0.1mm to 0.15mm.

[0174] It is understandable that limiting the movement of the component during vibration to 0.1mm to 0.15mm results in higher mechanical stability, as the displacement is smaller.

[0175] In addition, along the X direction, there is a certain gap between the limiting part 130 and the bottom wall of the third groove 320 to meet the expansion requirements of the light guide plate 300 in the X direction. Specifically, when designing the gap S4 between the limiting part 130 and the bottom of the third groove, S4 can satisfy: S4 ≥ (length of light guide plate 300 in the X direction * expansion coefficient of light guide plate 300 * temperature difference Δt + 0.3mm) / 2, where the temperature difference Δt is the absolute value of (the extreme temperature during product operation or storage -25℃). Through the above design, when the backlight module is designed with dual light strips 200, adding the S4 on both sides can meet the reliable expansion requirements of the light guide plate 300 in the X direction.

[0176] Referring again to Figures 26 and 27, the limiting portion 130 has a first surface 1301 on the side facing away from the base plate 110, and the light guide plate 300 has a first plate surface 300a on the side facing away from the base plate 110. The dimension between the first plate surface 300a and the base plate 100 in the Z direction is less than or equal to the dimension between the first surface 1301 and the base plate 100 in the Z direction. That is, the side of the limiting portion 300 away from the base plate 110 protrudes beyond the side of the light guide plate 300 facing away from the base plate 110, or the side of the limiting portion away from the base plate 110 is flush with the side of the light guide plate 300 facing away from the base plate 110.

[0177] Furthermore, referring together with Figures 27 to 33, the backlight module in this application also includes an optical film 800, which is located on the side of the light guide plate 300 away from the base plate 110.

[0178] As shown in Figures 29, 30, and 33, the limiting portion 130 disposed between the second groove 121 and the light guide plate 300 includes a first limiting portion 103a. The first limiting portion 130a has a fourth groove 1311 along the Z direction. A hanging ear rib 1312 is provided in the fourth groove 1311. Along the Y direction, the hanging ear rib 1312 can be located in the middle of the fourth groove 1311. Correspondingly, the optical film 800 has a second boss 810. The second boss 810 has a hanging ear hole 820, which passes through the second boss 810 along the Z direction. The second boss 810 is located in the fourth groove 1311, and the hanging ear rib 1312 passes through the hanging ear hole 820.

[0179] Alternatively, as shown in Figures 27, 28, and 32, the limiting portion 130 disposed between the second groove 121 and the light guide plate 300 includes a second limiting portion 103b, and the second limiting portion 130b has a fifth groove 1313 along the Z direction. Correspondingly, the optical film 800 has a third protrusion 830, which is located within the fifth groove 1313.

[0180] It is worth noting that, in the limiting portions 130 arranged along the X direction in this application, both limiting portions 130 can be designed as the first limiting portion 130a, or both limiting portions 130 can be designed as the second limiting portion 130b, or the limiting portion 130 on one side can be designed as the first limiting portion 130a, and the limiting portion 130 on the other side can be designed as the second limiting portion 130b.

[0181] Referring to Figure 33, when the backlight module is in its initial state, the lug 1312 can be located in the middle of the lug hole 820 along the X direction. At this time, the gap d2 between the inner wall of the lug hole 820 and the lug 1312 along the X direction can be 0.1mm to 0.15mm, which limits the movement of the optical film 800 in the X direction to only 0.1mm to 0.15mm. In addition, along the Y direction, the gap d3 between the second boss 810 and the inner wall of the film limiting groove 1311 can be 0.1mm to 0.15mm, thereby limiting the movement of the optical film 800 in the Y direction to only 0.1mm to 0.15mm. Thus, through the precise positioning design in the X and Y directions, the movement of the optical film 800 during vibration is controlled within 0.1mm to 0.15mm, which is beneficial to improving the mechanical stability of the backlight module.

[0182] Referring also to Figures 34 and 35, Figure 34 shows only a portion of the structure of the light strip in the X direction. The light strip 200 in this application specifically includes a carrier plate 210, a plurality of LEDs 220, at least one limiting block 230, and a connector 240. The LEDs 220, limiting blocks 230, and connector 240 are all disposed on the side of the carrier plate 210 facing the light guide plate 300. The plurality of LEDs 220 are spaced apart, and the limiting blocks 230 are disposed between adjacent LEDs 220.

[0183] The height of the limiting block 230 protruding from the carrier plate 210 is greater than the height of the lamp bead 220 protruding from the carrier plate 210. This prevents the light guide plate 300 from colliding with the lamp bead 220 and causing damage to the lamp bead 220. Since the light strip 200 and the light guide plate 300 are relatively fixed in this application, as an optional implementation, when the light guide plate 300, the light strip 200, and the adapter 400 are assembled, the light guide plate 300 can abut against the limiting block 230. This minimizes the gap between the light guide plate 300 and the lamp bead 220, thereby improving light input efficiency. For example, in a conventional light strip 200, the height of the lamp bead 220 is 0.6 mm, and the height of the limiting block 230 is 0.7 mm. With the above design, the gap between the light guide plate 300 and the lamp bead 220 can be reduced to 0.1 mm. Taking a 27-inch display device as an example, in the reference group of products, the gap between the light guide plate 300 and the lamp bead 220 is 0.45mm. When the gap is reduced to 0.1mm, the light input efficiency can be increased from the original 84.3% to 95.2%. It can be seen that the light input efficiency has been significantly improved.

[0184] Referring to Figure 35, connector 240 is located at one end of carrier plate 210. Since connector 240 is located on the side of carrier plate 210 facing light guide plate 300, to avoid interference between connector 240 and light guide plate 300, a clearance structure for avoiding interference between the connector 240 and the light guide plate 300 is also provided at the end of the light guide plate 300 near connector 240. Specifically, the clearance structure may include a first clearance surface 301 and a second clearance surface 302 that are interconnected, wherein the first clearance surface 301 is parallel to the X direction and the second clearance surface 302 is parallel to the Y direction. It can be understood that the first clearance surface 301 can be regarded as a structure formed by the side of the light guide plate 300 parallel to the Y direction being recessed in the X direction, and the second clearance surface 302 can be regarded as a structure formed by the side of the light guide plate 300 parallel to the X direction being recessed in the Y direction. In this way, an L-shaped notch is formed at the corner of the light guide plate 300 near connector 240, and connector 240 can be located within this notch.

[0185] There is a certain gap between the first clearance surface 301 and the connector 240, and there is also a certain gap between the second clearance surface 301 and the connector 240, so as to provide an expansion gap for the light guide plate 300.

[0186] Referring to Figure 36, the base plate 110 has an opening 113 opposite to the connector 240, and the connector 240 has a socket 241 for connecting to an external power source. The socket 241 is positioned facing the opening 113 so that it can be plugged into the external power source through the opening 113. The base plate 110 has an inner surface facing the light guide plate 300 and an outer surface 110a facing away from the light guide plate 300. The side of the light guide plate 300 facing the base plate 110 has a second plate surface (not shown in the figure). For ease of description, the outer surface 110a of the base plate 110 is defined as the outer surface plane, and the plane containing the socket 241 of the connector 240 is defined as the end face. The end face is located between the outer surface plane and the second plate surface, and the dimension between the end face and the second plate surface in the Z direction is less than or equal to the dimension between the outer surface plane and the second plate surface in the Z direction. In other words, when the outer surface 110a of the base plate 110 is placed upwards, the outer surface 110a is higher than the surface of the port 241 of the connector 240. Compared with the scheme in the reference group products where the connector 240 is placed outside the back plate 100, this application places the connector 240 inside the back plate 100, which can help reduce the overall height of the display module, thereby facilitating the thinner and lighter design of the product.

[0187] In some embodiments, referring to FIG37, the light strip 200 may include a carrier plate 210 and a connecting plate 250 connected to each other, wherein the carrier plate 210 is located between the light guide plate 300 and the side plate 120, and the connecting plate 250 is located between the light guide plate 300 and the base plate 110. Of course, the light strip 200 in this application also includes LED beads 220, limiting blocks 230 and connectors 240. The connection between the LED beads 220, limiting blocks 230 and connectors 240 and the carrier plate 210 can be referred to the structure described in FIG34, which will not be repeated here.

[0188] Referring to Figures 37 and 38, the first adapter plate 410 is located on the side of the connecting plate 250 facing away from the base plate 100. The first adapter plate 410 has a recessed platform 418 on the side facing the connecting plate 250, and the connecting plate 250 has a relief groove 251 opposite to the recessed platform 418. The relief groove 251 can be set through the connecting plate 250 in the Z direction, and the recessed platform 418 is located in the relief groove 251 to facilitate the positioning of the first adapter plate 410.

[0189] In this embodiment, when the backlight module is in its initial state, the recessed platform 418 can be located in the middle of the clearance groove 2111 along the X direction. At this time, a certain gap is maintained between the recessed platform 418 and the inner walls of the clearance groove 251 on both sides opposite to each other along the X direction. Furthermore, along the Y direction, a certain gap is also maintained between the end of the recessed platform 418 facing the second connecting plate 212 and the inner wall of the clearance groove 251.

[0190] For example, in the X direction, the gap d5 between the recessed platform 418 and the inner wall of the recessed groove 251 can be 0.1mm to 0.15mm, and in the Y direction, the gap between the recessed platform 418 and the inner wall of the recessed groove 2111 can also be 0.1mm to 0.15mm, so as to limit the amount of movement of the light guide plate 300 relative to the back plate 100 and minimize the amount of movement of the light guide plate 300.

[0191] To facilitate the Z-direction limiting of the connecting plate 250 and the first adapter plate 410, this application may also provide an elastic clamping piece 700 as shown in Figures 11 and 12. The elastic clamping piece 700 can be used to clamp the connecting plate 250 and the first adapter plate 410, thereby fixing the adapter plate 250 and the first adapter plate 410 relatively in the Z-direction.

[0192] Additionally, as shown in Figure 4, a first connecting portion 510 may be provided between the connecting plate 250 and the base plate 110 in this application. Alternatively, as shown in Figure 5, a second connecting portion 520 may be provided on the side of the carrier plate 210 away from the light guide plate 300. The material of the second connecting portion 520 may also be a metal material with good thermal conductivity to improve the heat dissipation effect of the lamp strip 200. Alternatively, as shown in Figure 6, a first connecting portion 510 may be provided between the connecting plate 250 and the base plate 110, and a second connecting portion 520 may be provided on the side of the carrier plate 210 away from the light guide plate 300. The first connecting portion 510 and the second connecting portion 520 are connected to each other so that the first connecting portion 510 and the second connecting portion 520 can fix and support the lamp strip 200 and the first adapter plate 410. Of course, when the materials of the first connecting portion 510 and the second connecting portion 520 are metal materials with good thermal conductivity, they can also achieve a good heat dissipation effect.

[0193] It is worth noting that when the first connecting part 510 is provided on the side of the connecting plate 250 facing the bottom plate as shown in Figure 4 or Figure 6, and the elastic clamping piece 700 shown in Figure 11 and Figure 12 is further provided, the elastic clamping piece 700 can simultaneously clamp the first connecting part 510, the connecting plate 250 and the first adapter plate 410, so that the three are limited in the Z direction.

[0194] In some embodiments, referring to FIG39, when the light strip 200 includes a carrier plate 210 located between the light guide plate 300 and the side plate 120 and a connecting plate 250 located between the light guide plate 300 and the bottom plate 110, the first adapter plate 410 is different from the one shown in FIG38, which is disposed on the side of the connecting plate 250 away from the bottom plate 110. Instead, the first adapter plate 410 and the connecting plate 250 are injection molded as a single unit. That is, the connecting plate 250 serves as both part of the light strip 200 and the first adapter plate 410. In this case, the light guide plate 300 is fixed to the side of the connecting plate 250 away from the bottom plate 110.

[0195] Furthermore, referring to Figure 40, L-shaped rubber strips 1000 are attached to the four corners of the back plate 100. In the Y direction, the L-shaped rubber strips 1000 are located between the lamp strip 200 and the side plate 120, and abut against the lamp strip 200. In the X direction, the L-shaped rubber strips 1000 are located between the light guide plate 300 and the side plate 120, and abut against the light guide plate 300. The L-shaped rubber strips 1000 can deform. When the light guide plate 300 expands in the X or Y direction, it can push the lamp strip 200 to compress the L-shaped rubber strips 1000 together. In this way, the L-shaped rubber strips 1000 provide effective expansion space for the light guide plate 300.

[0196] It should be noted that when the second connecting part 520 as shown in Figure 5 or Figure 6 or the second adapter plate 420 as shown in Figure 18 is provided between the light strip 200 and the side plate 120, the L rubber strip abuts against the second connecting part 520 or the second adapter plate 420.

[0197] Based on the same inventive concept, this application may also provide a display module, which includes a backlight module as described in any of the foregoing embodiments.

[0198] Based on the same inventive concept, this application may also provide a display device, the display module including the display module described in the foregoing embodiments.

[0199] In summary, the backlight module, display module, and display device in this application not only reduce the brightness fluctuation of the light guide plate and ensure the stability of the display image, but also improve the light input efficiency, enhance the internal mechanical stability of the backlight module, and reduce the risk of scratches.

[0200] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A backlight module, wherein, include: The back panel includes a bottom plate and multiple side plates connected to the bottom plate, the multiple side plates being connected end to end in sequence to form an accommodating space; The light strip, light guide plate, and adapter are located within the accommodating space; The adapter includes a first adapter plate, which is located between the light guide plate and the base plate; The light guide plate is fixed to the side of the first adapter plate opposite to the base plate; The light strip is located between the light guide plate and the side plate, and the light strip is fixedly connected to the first adapter plate.

2. The backlight module according to claim 1, wherein, It also includes a first connector, which includes a first connecting part and a second connecting part that are connected to each other. The first connecting part is located between the first adapter part and the base plate, and the second connecting part is located between the light strip and the side plate. The first adapter plate is fixed to the side of the first connecting part away from the base plate; The light strip is fixed to the side of the second connecting part facing the light guide plate.

3. The backlight module according to claim 2, wherein, It also includes an elastic clip for clamping the first adapter plate and the first connecting part; The elastic clip includes a first clip and a second clip disposed opposite to each other, and a third clip connecting the first clip and the second clip. The first clip is located on the side of the first adapter plate away from the base plate, the second clip is located on the side of the first connecting portion close to the base plate, and the third clip is located between the first clip and the second clip.

4. The backlight module according to claim 3, wherein, The first clip and the second clip are made of thin metal, and / or the thickness of the first clip and the second clip is 0.15mm to 0.25mm.

5. The backlight module according to any one of claims 2 to 4, wherein, The first adapter plate has a first hole, and the first connecting part has a first post. The first post passes through the first hole. The size of the first hole along the first direction is the same as the size of the first hole along the second direction. The first direction is the length direction of the light strip, and the second direction is the arrangement direction of the light strip and the light guide plate.

6. The backlight module according to claim 5, wherein, Along the first direction, the first adapter plate is provided with at least one second hole on each side of the first hole, and the first connecting part is also provided with a second post corresponding to each of the second holes, and the second post passes through the corresponding second hole; The dimension of the second hole along the first direction is greater than the dimension of the first hole along the first direction, and the dimension of the second hole along the first direction is the same as the dimension of the first hole along the first direction.

7. The backlight module according to any one of claims 2 to 6, wherein, The first connector is made of metal.

8. The backlight module according to claim 1, wherein, The adapter also includes a second adapter plate connected to the first adapter plate. The second adapter plate is located between the side plate and the light strip, and is connected to the side of the first adapter plate facing the side plate. The light strip is fixed to the side of the second adapter plate facing the light guide plate.

9. The backlight module according to claim 8, wherein, The material of the second adapter plate is metal.

10. The backlight module according to claim 8, wherein, It also includes a heat dissipation clip, which includes a first heat dissipation plate located between the light strip and the second adapter plate, and the first heat dissipation plate is fixed to the light strip.

11. The backlight module according to claim 10, wherein, The heat dissipation clip also includes a second heat dissipation plate connected to the first heat dissipation plate, and the second heat dissipation plate is fixed to the side of the second adapter plate away from the base plate; or The heat dissipation clip further includes a second heat dissipation plate and a third heat dissipation plate. The second heat dissipation plate is connected between the first heat dissipation plate and the third heat dissipation plate. The second heat dissipation plate is fixed to the side of the second adapter plate opposite to the base plate, and the third heat dissipation plate is fixed to the side of the second adapter plate opposite to the light strip; or The heat dissipation clip also includes a second heat dissipation plate, a third heat dissipation plate, and a fourth heat dissipation plate connected in sequence. The second heat dissipation plate is connected to the first heat dissipation plate and fixed to the side of the second adapter plate away from the base plate. The third heat dissipation plate is fixed to the side of the second adapter plate away from the light strip. The fourth heat dissipation plate is fixed to the base plate, and there is a gap between the fourth heat dissipation plate and the side plate.

12. The backlight module according to claim 11, wherein, The adapter also includes a first limiting structure connected to the first adapter plate. The first limiting structure is located on the side of the second adapter plate facing the side plate. The bottom plate is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to limit the bottom plate and the adapter. When the heat dissipation clip includes a third heat dissipation plate, the heat dissipation plate is provided with a clearance groove for avoiding the first limiting structure and the second limiting structure.

13. The backlight module according to claim 1, wherein, The adapter includes a first connector connected to the first adapter plate, and the light strip includes a second connector located on the side away from the light guide plate. The first connector and the second connector are engaged and connected.

14. The backlight module according to claim 1, wherein, The light strip includes a carrier plate and a connecting plate that are connected to each other. The carrier plate is located between the light guide plate and the side plate, and the connecting plate is located between the light guide plate and the bottom plate. The first adapter plate and the connecting plate are integrally formed.

15. The backlight module according to claim 1, wherein, The light strip includes a carrier plate and a connecting plate connected to each other. The carrier plate is located between the light guide plate and the side plate, and the connecting plate is located between the light guide plate and the base plate. The first adapter plate is located on the side of the connecting plate opposite to the base plate.

16. The backlight module according to claim 15, wherein, The first adapter plate has a recessed platform on the side facing the connecting plate, the connecting plate has a clearance groove, and the recessed platform is located in the clearance groove.

17. The backlight module according to any one of claims 1 to 16, wherein, The adapter also includes at least one protrusion connected to the first adapter plate, the protrusion being located between the side plate and the light strip, and the side of the protrusion facing the side plate having a first groove; The base plate is provided with a third column, which passes through the first groove.

18. The backlight module according to claim 17, wherein, The adapter also includes a second adapter plate connected to the first adapter plate, the second adapter plate being located between the light strip and the side plate; The protrusion is fixed to the side of the second adapter plate facing the side plate; or The protrusion is fixed to the side of the first adapter plate facing the side plate, and the second adapter plate is provided with a clearance structure for avoiding the protrusion.

19. The backlight module according to any one of claims 1 to 18, wherein, The base plate is provided with a fourth post, and the first adapter plate is provided with a third hole. The dimension of the third hole along the second direction is larger than the dimension of the third hole along the first direction, and the fourth post passes through the third hole. Wherein, the first direction is the length direction of the light strip, and the second direction is the arrangement direction of the light strip and the light guide plate.

20. The backlight module according to any one of claims 1 to 19, wherein, The ratio of the coefficient of thermal expansion of the first adapter plate to that of the light guide plate is 0.9 to 1.

1.

21. The backlight module according to any one of claims 1 to 20, wherein, The back panel includes a first side panel and a second side panel that are connected to each other. The light strip is provided between the first side panel and the light guide plate, while the light strip is not provided between the second side panel and the light guide plate. The second side plate has a second groove along a third direction, and at least one limiting part is provided between the second groove and the light guide plate; The light guide plate has at least two first protrusions on the side facing the second side plate. The at least two first protrusions are arranged along the second direction. A third groove is formed between two adjacent first protrusions. The limiting part passes through the third groove. Wherein, the second direction is the arrangement direction of the light guide plate and the light strip, and the third direction is the thickness direction of the light guide plate.

22. The backlight module according to claim 21, wherein, The opening direction of the second groove is not parallel to the opening direction of the third groove.

23. The backlight module according to claim 22, wherein, The limiting part has a first surface on the side away from the base plate, and the light guide plate has a first plate surface on the side away from the base plate. The dimension between the first plate surface and the base plate along a third direction is less than or equal to the dimension between the first plate surface and the base plate along a third direction.

24. The backlight module according to claim 23, wherein, It also includes an optical film located on the side of the light guide plate opposite to the base plate; The at least one limiting portion includes a first limiting portion, the first limiting portion having a fourth groove along the third direction, the fourth groove having a hanging ear rib, the optical film including a second protrusion having a hanging ear hole, the second protrusion being located within the fourth groove, and the hanging ear rib passing through the hanging ear hole; and / or The at least one limiting part includes a second limiting part, the second limiting part having a fifth groove along the third direction, and the optical film including a third protrusion located in the fifth groove.

25. The backlight module according to any one of claims 1 to 24, wherein, It also includes an adhesive layer located between the light guide plate and the first adapter plate, wherein the light guide plate is fixed to the side of the first adapter plate opposite to the base plate by the adhesive layer.

26. The backlight module according to claim 25, wherein, It also includes a reflective sheet, which is located between the light guide plate and the base plate; The adhesive layer includes a first adhesive portion and a second adhesive portion located interconnected. The first adhesive portion bonds the reflective sheet, and the second adhesive portion bonds the light guide plate. The second adhesive portion is located between the first adhesive portion and the light strip. The orthographic projection of the first adhesive portion on the side plate at least partially overlaps with the orthographic projection of the second adhesive portion on the side plate. The dimension of the first adhesive portion in a third direction is smaller than the dimension of the second adhesive portion in the third direction; or... The adhesive layer includes a first adhesive portion and a second adhesive portion located interconnected. The first adhesive portion is located on the side of the first adapter away from the base plate. The reflective sheet is bonded to the first adhesive portion. The second adhesive portion is located on the side of the first adhesive portion opposite to the first adapter. The light guide plate is bonded to the second adhesive portion. The orthographic projection of the first adhesive portion on the base plate and the orthographic projection of the second adhesive portion on the base plate at least partially overlap. The dimension of the first adhesive layer in the second direction is larger than the dimension of the second adhesive layer in the second direction. Wherein, the second direction is the arrangement direction of the light guide plate and the light strip, and the third direction is the thickness direction of the light guide plate.

27. The backlight module according to any one of claims 1 to 26, wherein, The light strip includes a carrier plate, a plurality of LED beads and at least one limiting block. The LED beads and the limiting block are fixed to the side of the carrier plate facing the light guide plate. The plurality of LED beads are spaced apart, and the limiting block is located between adjacent LED beads. The height of the limiting block protruding from the carrier plate is greater than the height of the lamp bead protruding from the carrier plate, and the light guide plate abuts against the limiting block.

28. The backlight module according to claim 27, wherein, The light strip also includes a connector, which is fixed to the side of the carrier plate facing the light guide plate; The connector has a socket, and the base plate has an opening directly opposite the socket; The plane containing the socket is the end face, the plane containing the outer surface of the base plate is the outer surface plane, the light guide plate has a second plate surface on the side facing the base plate, and the end face is located between the outer surface plane and the second plate surface; The distance between the end face and the second plate surface in the third direction is less than or equal to the distance between the outer surface plane and the second plate surface in the third direction; Wherein, the third direction refers to the thickness direction of the light guide plate.

29. A display module, wherein, Includes the backlight module as described in any one of claims 1 to 28.

30. A display device, wherein, Includes the display module as described in claim 29.

Images